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
;
442 kfree(sbi
->s_blockgroup_lock
);
447 static struct kmem_cache
*ext3_inode_cachep
;
450 * Called inside transaction, so use GFP_NOFS
452 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
454 struct ext3_inode_info
*ei
;
456 ei
= kmem_cache_alloc(ext3_inode_cachep
, GFP_NOFS
);
459 #ifdef CONFIG_EXT3_FS_POSIX_ACL
460 ei
->i_acl
= EXT3_ACL_NOT_CACHED
;
461 ei
->i_default_acl
= EXT3_ACL_NOT_CACHED
;
463 ei
->i_block_alloc_info
= NULL
;
464 ei
->vfs_inode
.i_version
= 1;
465 return &ei
->vfs_inode
;
468 static void ext3_destroy_inode(struct inode
*inode
)
470 if (!list_empty(&(EXT3_I(inode
)->i_orphan
))) {
471 printk("EXT3 Inode %p: orphan list check failed!\n",
473 print_hex_dump(KERN_INFO
, "", DUMP_PREFIX_ADDRESS
, 16, 4,
474 EXT3_I(inode
), sizeof(struct ext3_inode_info
),
478 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
481 static void init_once(void *foo
)
483 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
485 INIT_LIST_HEAD(&ei
->i_orphan
);
486 #ifdef CONFIG_EXT3_FS_XATTR
487 init_rwsem(&ei
->xattr_sem
);
489 mutex_init(&ei
->truncate_mutex
);
490 inode_init_once(&ei
->vfs_inode
);
493 static int init_inodecache(void)
495 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
496 sizeof(struct ext3_inode_info
),
497 0, (SLAB_RECLAIM_ACCOUNT
|
500 if (ext3_inode_cachep
== NULL
)
505 static void destroy_inodecache(void)
507 kmem_cache_destroy(ext3_inode_cachep
);
510 static void ext3_clear_inode(struct inode
*inode
)
512 struct ext3_block_alloc_info
*rsv
= EXT3_I(inode
)->i_block_alloc_info
;
513 #ifdef CONFIG_EXT3_FS_POSIX_ACL
514 if (EXT3_I(inode
)->i_acl
&&
515 EXT3_I(inode
)->i_acl
!= EXT3_ACL_NOT_CACHED
) {
516 posix_acl_release(EXT3_I(inode
)->i_acl
);
517 EXT3_I(inode
)->i_acl
= EXT3_ACL_NOT_CACHED
;
519 if (EXT3_I(inode
)->i_default_acl
&&
520 EXT3_I(inode
)->i_default_acl
!= EXT3_ACL_NOT_CACHED
) {
521 posix_acl_release(EXT3_I(inode
)->i_default_acl
);
522 EXT3_I(inode
)->i_default_acl
= EXT3_ACL_NOT_CACHED
;
525 ext3_discard_reservation(inode
);
526 EXT3_I(inode
)->i_block_alloc_info
= NULL
;
531 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
533 #if defined(CONFIG_QUOTA)
534 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
536 if (sbi
->s_jquota_fmt
)
537 seq_printf(seq
, ",jqfmt=%s",
538 (sbi
->s_jquota_fmt
== QFMT_VFS_OLD
) ? "vfsold": "vfsv0");
540 if (sbi
->s_qf_names
[USRQUOTA
])
541 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
543 if (sbi
->s_qf_names
[GRPQUOTA
])
544 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
546 if (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
)
547 seq_puts(seq
, ",usrquota");
549 if (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)
550 seq_puts(seq
, ",grpquota");
556 * - it's set to a non-default value OR
557 * - if the per-sb default is different from the global default
559 static int ext3_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
561 struct super_block
*sb
= vfs
->mnt_sb
;
562 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
563 struct ext3_super_block
*es
= sbi
->s_es
;
564 unsigned long def_mount_opts
;
566 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
568 if (sbi
->s_sb_block
!= 1)
569 seq_printf(seq
, ",sb=%lu", sbi
->s_sb_block
);
570 if (test_opt(sb
, MINIX_DF
))
571 seq_puts(seq
, ",minixdf");
572 if (test_opt(sb
, GRPID
))
573 seq_puts(seq
, ",grpid");
574 if (!test_opt(sb
, GRPID
) && (def_mount_opts
& EXT3_DEFM_BSDGROUPS
))
575 seq_puts(seq
, ",nogrpid");
576 if (sbi
->s_resuid
!= EXT3_DEF_RESUID
||
577 le16_to_cpu(es
->s_def_resuid
) != EXT3_DEF_RESUID
) {
578 seq_printf(seq
, ",resuid=%u", sbi
->s_resuid
);
580 if (sbi
->s_resgid
!= EXT3_DEF_RESGID
||
581 le16_to_cpu(es
->s_def_resgid
) != EXT3_DEF_RESGID
) {
582 seq_printf(seq
, ",resgid=%u", sbi
->s_resgid
);
584 if (test_opt(sb
, ERRORS_RO
)) {
585 int def_errors
= le16_to_cpu(es
->s_errors
);
587 if (def_errors
== EXT3_ERRORS_PANIC
||
588 def_errors
== EXT3_ERRORS_CONTINUE
) {
589 seq_puts(seq
, ",errors=remount-ro");
592 if (test_opt(sb
, ERRORS_CONT
))
593 seq_puts(seq
, ",errors=continue");
594 if (test_opt(sb
, ERRORS_PANIC
))
595 seq_puts(seq
, ",errors=panic");
596 if (test_opt(sb
, NO_UID32
))
597 seq_puts(seq
, ",nouid32");
598 if (test_opt(sb
, DEBUG
))
599 seq_puts(seq
, ",debug");
600 if (test_opt(sb
, OLDALLOC
))
601 seq_puts(seq
, ",oldalloc");
602 #ifdef CONFIG_EXT3_FS_XATTR
603 if (test_opt(sb
, XATTR_USER
))
604 seq_puts(seq
, ",user_xattr");
605 if (!test_opt(sb
, XATTR_USER
) &&
606 (def_mount_opts
& EXT3_DEFM_XATTR_USER
)) {
607 seq_puts(seq
, ",nouser_xattr");
610 #ifdef CONFIG_EXT3_FS_POSIX_ACL
611 if (test_opt(sb
, POSIX_ACL
))
612 seq_puts(seq
, ",acl");
613 if (!test_opt(sb
, POSIX_ACL
) && (def_mount_opts
& EXT3_DEFM_ACL
))
614 seq_puts(seq
, ",noacl");
616 if (!test_opt(sb
, RESERVATION
))
617 seq_puts(seq
, ",noreservation");
618 if (sbi
->s_commit_interval
) {
619 seq_printf(seq
, ",commit=%u",
620 (unsigned) (sbi
->s_commit_interval
/ HZ
));
622 if (test_opt(sb
, BARRIER
))
623 seq_puts(seq
, ",barrier=1");
624 if (test_opt(sb
, NOBH
))
625 seq_puts(seq
, ",nobh");
627 if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
)
628 seq_puts(seq
, ",data=journal");
629 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
)
630 seq_puts(seq
, ",data=ordered");
631 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)
632 seq_puts(seq
, ",data=writeback");
634 if (test_opt(sb
, DATA_ERR_ABORT
))
635 seq_puts(seq
, ",data_err=abort");
637 ext3_show_quota_options(seq
, sb
);
643 static struct inode
*ext3_nfs_get_inode(struct super_block
*sb
,
644 u64 ino
, u32 generation
)
648 if (ino
< EXT3_FIRST_INO(sb
) && ino
!= EXT3_ROOT_INO
)
649 return ERR_PTR(-ESTALE
);
650 if (ino
> le32_to_cpu(EXT3_SB(sb
)->s_es
->s_inodes_count
))
651 return ERR_PTR(-ESTALE
);
653 /* iget isn't really right if the inode is currently unallocated!!
655 * ext3_read_inode will return a bad_inode if the inode had been
656 * deleted, so we should be safe.
658 * Currently we don't know the generation for parent directory, so
659 * a generation of 0 means "accept any"
661 inode
= ext3_iget(sb
, ino
);
663 return ERR_CAST(inode
);
664 if (generation
&& inode
->i_generation
!= generation
) {
666 return ERR_PTR(-ESTALE
);
672 static struct dentry
*ext3_fh_to_dentry(struct super_block
*sb
, struct fid
*fid
,
673 int fh_len
, int fh_type
)
675 return generic_fh_to_dentry(sb
, fid
, fh_len
, fh_type
,
679 static struct dentry
*ext3_fh_to_parent(struct super_block
*sb
, struct fid
*fid
,
680 int fh_len
, int fh_type
)
682 return generic_fh_to_parent(sb
, fid
, fh_len
, fh_type
,
687 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
688 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
690 static int ext3_dquot_initialize(struct inode
*inode
, int type
);
691 static int ext3_dquot_drop(struct inode
*inode
);
692 static int ext3_write_dquot(struct dquot
*dquot
);
693 static int ext3_acquire_dquot(struct dquot
*dquot
);
694 static int ext3_release_dquot(struct dquot
*dquot
);
695 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
696 static int ext3_write_info(struct super_block
*sb
, int type
);
697 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
698 char *path
, int remount
);
699 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
700 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
701 size_t len
, loff_t off
);
702 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
703 const char *data
, size_t len
, loff_t off
);
705 static struct dquot_operations ext3_quota_operations
= {
706 .initialize
= ext3_dquot_initialize
,
707 .drop
= ext3_dquot_drop
,
708 .alloc_space
= dquot_alloc_space
,
709 .alloc_inode
= dquot_alloc_inode
,
710 .free_space
= dquot_free_space
,
711 .free_inode
= dquot_free_inode
,
712 .transfer
= dquot_transfer
,
713 .write_dquot
= ext3_write_dquot
,
714 .acquire_dquot
= ext3_acquire_dquot
,
715 .release_dquot
= ext3_release_dquot
,
716 .mark_dirty
= ext3_mark_dquot_dirty
,
717 .write_info
= ext3_write_info
,
718 .alloc_dquot
= dquot_alloc
,
719 .destroy_dquot
= dquot_destroy
,
722 static struct quotactl_ops ext3_qctl_operations
= {
723 .quota_on
= ext3_quota_on
,
724 .quota_off
= vfs_quota_off
,
725 .quota_sync
= vfs_quota_sync
,
726 .get_info
= vfs_get_dqinfo
,
727 .set_info
= vfs_set_dqinfo
,
728 .get_dqblk
= vfs_get_dqblk
,
729 .set_dqblk
= vfs_set_dqblk
733 static const struct super_operations ext3_sops
= {
734 .alloc_inode
= ext3_alloc_inode
,
735 .destroy_inode
= ext3_destroy_inode
,
736 .write_inode
= ext3_write_inode
,
737 .dirty_inode
= ext3_dirty_inode
,
738 .delete_inode
= ext3_delete_inode
,
739 .put_super
= ext3_put_super
,
740 .write_super
= ext3_write_super
,
741 .sync_fs
= ext3_sync_fs
,
742 .write_super_lockfs
= ext3_write_super_lockfs
,
743 .unlockfs
= ext3_unlockfs
,
744 .statfs
= ext3_statfs
,
745 .remount_fs
= ext3_remount
,
746 .clear_inode
= ext3_clear_inode
,
747 .show_options
= ext3_show_options
,
749 .quota_read
= ext3_quota_read
,
750 .quota_write
= ext3_quota_write
,
754 static const struct export_operations ext3_export_ops
= {
755 .fh_to_dentry
= ext3_fh_to_dentry
,
756 .fh_to_parent
= ext3_fh_to_parent
,
757 .get_parent
= ext3_get_parent
,
761 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
762 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
763 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
764 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
765 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
766 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
767 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
768 Opt_data_err_abort
, Opt_data_err_ignore
,
769 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
770 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_quota
, Opt_noquota
,
771 Opt_ignore
, Opt_barrier
, Opt_err
, Opt_resize
, Opt_usrquota
,
775 static const match_table_t tokens
= {
776 {Opt_bsd_df
, "bsddf"},
777 {Opt_minix_df
, "minixdf"},
778 {Opt_grpid
, "grpid"},
779 {Opt_grpid
, "bsdgroups"},
780 {Opt_nogrpid
, "nogrpid"},
781 {Opt_nogrpid
, "sysvgroups"},
782 {Opt_resgid
, "resgid=%u"},
783 {Opt_resuid
, "resuid=%u"},
785 {Opt_err_cont
, "errors=continue"},
786 {Opt_err_panic
, "errors=panic"},
787 {Opt_err_ro
, "errors=remount-ro"},
788 {Opt_nouid32
, "nouid32"},
789 {Opt_nocheck
, "nocheck"},
790 {Opt_nocheck
, "check=none"},
791 {Opt_debug
, "debug"},
792 {Opt_oldalloc
, "oldalloc"},
793 {Opt_orlov
, "orlov"},
794 {Opt_user_xattr
, "user_xattr"},
795 {Opt_nouser_xattr
, "nouser_xattr"},
797 {Opt_noacl
, "noacl"},
798 {Opt_reservation
, "reservation"},
799 {Opt_noreservation
, "noreservation"},
800 {Opt_noload
, "noload"},
803 {Opt_commit
, "commit=%u"},
804 {Opt_journal_update
, "journal=update"},
805 {Opt_journal_inum
, "journal=%u"},
806 {Opt_journal_dev
, "journal_dev=%u"},
807 {Opt_abort
, "abort"},
808 {Opt_data_journal
, "data=journal"},
809 {Opt_data_ordered
, "data=ordered"},
810 {Opt_data_writeback
, "data=writeback"},
811 {Opt_data_err_abort
, "data_err=abort"},
812 {Opt_data_err_ignore
, "data_err=ignore"},
813 {Opt_offusrjquota
, "usrjquota="},
814 {Opt_usrjquota
, "usrjquota=%s"},
815 {Opt_offgrpjquota
, "grpjquota="},
816 {Opt_grpjquota
, "grpjquota=%s"},
817 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
818 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
819 {Opt_grpquota
, "grpquota"},
820 {Opt_noquota
, "noquota"},
821 {Opt_quota
, "quota"},
822 {Opt_usrquota
, "usrquota"},
823 {Opt_barrier
, "barrier=%u"},
824 {Opt_resize
, "resize"},
828 static ext3_fsblk_t
get_sb_block(void **data
)
830 ext3_fsblk_t sb_block
;
831 char *options
= (char *) *data
;
833 if (!options
|| strncmp(options
, "sb=", 3) != 0)
834 return 1; /* Default location */
836 /*todo: use simple_strtoll with >32bit ext3 */
837 sb_block
= simple_strtoul(options
, &options
, 0);
838 if (*options
&& *options
!= ',') {
839 printk("EXT3-fs: Invalid sb specification: %s\n",
845 *data
= (void *) options
;
849 static int parse_options (char *options
, struct super_block
*sb
,
850 unsigned int *inum
, unsigned long *journal_devnum
,
851 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
853 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
855 substring_t args
[MAX_OPT_ARGS
];
866 while ((p
= strsep (&options
, ",")) != NULL
) {
871 token
= match_token(p
, tokens
, args
);
874 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
877 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
880 set_opt (sbi
->s_mount_opt
, GRPID
);
883 clear_opt (sbi
->s_mount_opt
, GRPID
);
886 if (match_int(&args
[0], &option
))
888 sbi
->s_resuid
= option
;
891 if (match_int(&args
[0], &option
))
893 sbi
->s_resgid
= option
;
896 /* handled by get_sb_block() instead of here */
897 /* *sb_block = match_int(&args[0]); */
900 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
901 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
902 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
905 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
906 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
907 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
910 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
911 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
912 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
915 set_opt (sbi
->s_mount_opt
, NO_UID32
);
918 clear_opt (sbi
->s_mount_opt
, CHECK
);
921 set_opt (sbi
->s_mount_opt
, DEBUG
);
924 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
927 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
929 #ifdef CONFIG_EXT3_FS_XATTR
931 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
933 case Opt_nouser_xattr
:
934 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
938 case Opt_nouser_xattr
:
939 printk("EXT3 (no)user_xattr options not supported\n");
942 #ifdef CONFIG_EXT3_FS_POSIX_ACL
944 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
947 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
952 printk("EXT3 (no)acl options not supported\n");
955 case Opt_reservation
:
956 set_opt(sbi
->s_mount_opt
, RESERVATION
);
958 case Opt_noreservation
:
959 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
961 case Opt_journal_update
:
963 /* Eventually we will want to be able to create
964 a journal file here. For now, only allow the
965 user to specify an existing inode to be the
968 printk(KERN_ERR
"EXT3-fs: cannot specify "
969 "journal on remount\n");
972 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
974 case Opt_journal_inum
:
976 printk(KERN_ERR
"EXT3-fs: cannot specify "
977 "journal on remount\n");
980 if (match_int(&args
[0], &option
))
984 case Opt_journal_dev
:
986 printk(KERN_ERR
"EXT3-fs: cannot specify "
987 "journal on remount\n");
990 if (match_int(&args
[0], &option
))
992 *journal_devnum
= option
;
995 set_opt (sbi
->s_mount_opt
, NOLOAD
);
998 if (match_int(&args
[0], &option
))
1003 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1004 sbi
->s_commit_interval
= HZ
* option
;
1006 case Opt_data_journal
:
1007 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1009 case Opt_data_ordered
:
1010 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1012 case Opt_data_writeback
:
1013 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1016 if ((sbi
->s_mount_opt
& EXT3_MOUNT_DATA_FLAGS
)
1019 "EXT3-fs: cannot change data "
1020 "mode on remount\n");
1024 sbi
->s_mount_opt
&= ~EXT3_MOUNT_DATA_FLAGS
;
1025 sbi
->s_mount_opt
|= data_opt
;
1028 case Opt_data_err_abort
:
1029 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1031 case Opt_data_err_ignore
:
1032 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1041 if (sb_any_quota_loaded(sb
) &&
1042 !sbi
->s_qf_names
[qtype
]) {
1044 "EXT3-fs: Cannot change journaled "
1045 "quota options when quota turned on.\n");
1048 qname
= match_strdup(&args
[0]);
1051 "EXT3-fs: not enough memory for "
1052 "storing quotafile name.\n");
1055 if (sbi
->s_qf_names
[qtype
] &&
1056 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
1058 "EXT3-fs: %s quota file already "
1059 "specified.\n", QTYPE2NAME(qtype
));
1063 sbi
->s_qf_names
[qtype
] = qname
;
1064 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
1066 "EXT3-fs: quotafile must be on "
1067 "filesystem root.\n");
1068 kfree(sbi
->s_qf_names
[qtype
]);
1069 sbi
->s_qf_names
[qtype
] = NULL
;
1072 set_opt(sbi
->s_mount_opt
, QUOTA
);
1074 case Opt_offusrjquota
:
1077 case Opt_offgrpjquota
:
1080 if (sb_any_quota_loaded(sb
) &&
1081 sbi
->s_qf_names
[qtype
]) {
1082 printk(KERN_ERR
"EXT3-fs: Cannot change "
1083 "journaled quota options when "
1084 "quota turned on.\n");
1088 * The space will be released later when all options
1089 * are confirmed to be correct
1091 sbi
->s_qf_names
[qtype
] = NULL
;
1093 case Opt_jqfmt_vfsold
:
1094 qfmt
= QFMT_VFS_OLD
;
1096 case Opt_jqfmt_vfsv0
:
1099 if (sb_any_quota_loaded(sb
) &&
1100 sbi
->s_jquota_fmt
!= qfmt
) {
1101 printk(KERN_ERR
"EXT3-fs: Cannot change "
1102 "journaled quota options when "
1103 "quota turned on.\n");
1106 sbi
->s_jquota_fmt
= qfmt
;
1110 set_opt(sbi
->s_mount_opt
, QUOTA
);
1111 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1114 set_opt(sbi
->s_mount_opt
, QUOTA
);
1115 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1118 if (sb_any_quota_loaded(sb
)) {
1119 printk(KERN_ERR
"EXT3-fs: Cannot change quota "
1120 "options when quota turned on.\n");
1123 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1124 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1125 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1132 "EXT3-fs: quota options not supported.\n");
1136 case Opt_offusrjquota
:
1137 case Opt_offgrpjquota
:
1138 case Opt_jqfmt_vfsold
:
1139 case Opt_jqfmt_vfsv0
:
1141 "EXT3-fs: journaled quota options not "
1148 set_opt(sbi
->s_mount_opt
, ABORT
);
1151 if (match_int(&args
[0], &option
))
1154 set_opt(sbi
->s_mount_opt
, BARRIER
);
1156 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1162 printk("EXT3-fs: resize option only available "
1166 if (match_int(&args
[0], &option
) != 0)
1168 *n_blocks_count
= option
;
1171 set_opt(sbi
->s_mount_opt
, NOBH
);
1174 clear_opt(sbi
->s_mount_opt
, NOBH
);
1178 "EXT3-fs: Unrecognized mount option \"%s\" "
1179 "or missing value\n", p
);
1184 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1185 if ((sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
) &&
1186 sbi
->s_qf_names
[USRQUOTA
])
1187 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1189 if ((sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
) &&
1190 sbi
->s_qf_names
[GRPQUOTA
])
1191 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1193 if ((sbi
->s_qf_names
[USRQUOTA
] &&
1194 (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)) ||
1195 (sbi
->s_qf_names
[GRPQUOTA
] &&
1196 (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
))) {
1197 printk(KERN_ERR
"EXT3-fs: old and new quota "
1198 "format mixing.\n");
1202 if (!sbi
->s_jquota_fmt
) {
1203 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1204 "not specified.\n");
1208 if (sbi
->s_jquota_fmt
) {
1209 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1210 "specified with no journaling "
1219 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1222 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1225 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1226 printk (KERN_ERR
"EXT3-fs warning: revision level too high, "
1227 "forcing read-only mode\n");
1232 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1233 printk (KERN_WARNING
"EXT3-fs warning: mounting unchecked fs, "
1234 "running e2fsck is recommended\n");
1235 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1236 printk (KERN_WARNING
1237 "EXT3-fs warning: mounting fs with errors, "
1238 "running e2fsck is recommended\n");
1239 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1240 le16_to_cpu(es
->s_mnt_count
) >=
1241 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1242 printk (KERN_WARNING
1243 "EXT3-fs warning: maximal mount count reached, "
1244 "running e2fsck is recommended\n");
1245 else if (le32_to_cpu(es
->s_checkinterval
) &&
1246 (le32_to_cpu(es
->s_lastcheck
) +
1247 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1248 printk (KERN_WARNING
1249 "EXT3-fs warning: checktime reached, "
1250 "running e2fsck is recommended\n");
1252 /* @@@ We _will_ want to clear the valid bit if we find
1253 inconsistencies, to force a fsck at reboot. But for
1254 a plain journaled filesystem we can keep it set as
1255 valid forever! :) */
1256 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1258 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1259 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1260 le16_add_cpu(&es
->s_mnt_count
, 1);
1261 es
->s_mtime
= cpu_to_le32(get_seconds());
1262 ext3_update_dynamic_rev(sb
);
1263 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1265 ext3_commit_super(sb
, es
, 1);
1266 if (test_opt(sb
, DEBUG
))
1267 printk(KERN_INFO
"[EXT3 FS bs=%lu, gc=%lu, "
1268 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1270 sbi
->s_groups_count
,
1271 EXT3_BLOCKS_PER_GROUP(sb
),
1272 EXT3_INODES_PER_GROUP(sb
),
1275 printk(KERN_INFO
"EXT3 FS on %s, ", sb
->s_id
);
1276 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1277 char b
[BDEVNAME_SIZE
];
1279 printk("external journal on %s\n",
1280 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1282 printk("internal journal\n");
1287 /* Called at mount-time, super-block is locked */
1288 static int ext3_check_descriptors(struct super_block
*sb
)
1290 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1293 ext3_debug ("Checking group descriptors");
1295 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1296 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1297 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1298 ext3_fsblk_t last_block
;
1300 if (i
== sbi
->s_groups_count
- 1)
1301 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1303 last_block
= first_block
+
1304 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1306 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1307 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1309 ext3_error (sb
, "ext3_check_descriptors",
1310 "Block bitmap for group %d"
1311 " not in group (block %lu)!",
1313 le32_to_cpu(gdp
->bg_block_bitmap
));
1316 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1317 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1319 ext3_error (sb
, "ext3_check_descriptors",
1320 "Inode bitmap for group %d"
1321 " not in group (block %lu)!",
1323 le32_to_cpu(gdp
->bg_inode_bitmap
));
1326 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1327 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1330 ext3_error (sb
, "ext3_check_descriptors",
1331 "Inode table for group %d"
1332 " not in group (block %lu)!",
1334 le32_to_cpu(gdp
->bg_inode_table
));
1339 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1340 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1345 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1346 * the superblock) which were deleted from all directories, but held open by
1347 * a process at the time of a crash. We walk the list and try to delete these
1348 * inodes at recovery time (only with a read-write filesystem).
1350 * In order to keep the orphan inode chain consistent during traversal (in
1351 * case of crash during recovery), we link each inode into the superblock
1352 * orphan list_head and handle it the same way as an inode deletion during
1353 * normal operation (which journals the operations for us).
1355 * We only do an iget() and an iput() on each inode, which is very safe if we
1356 * accidentally point at an in-use or already deleted inode. The worst that
1357 * can happen in this case is that we get a "bit already cleared" message from
1358 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1359 * e2fsck was run on this filesystem, and it must have already done the orphan
1360 * inode cleanup for us, so we can safely abort without any further action.
1362 static void ext3_orphan_cleanup (struct super_block
* sb
,
1363 struct ext3_super_block
* es
)
1365 unsigned int s_flags
= sb
->s_flags
;
1366 int nr_orphans
= 0, nr_truncates
= 0;
1370 if (!es
->s_last_orphan
) {
1371 jbd_debug(4, "no orphan inodes to clean up\n");
1375 if (bdev_read_only(sb
->s_bdev
)) {
1376 printk(KERN_ERR
"EXT3-fs: write access "
1377 "unavailable, skipping orphan cleanup.\n");
1381 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1382 if (es
->s_last_orphan
)
1383 jbd_debug(1, "Errors on filesystem, "
1384 "clearing orphan list.\n");
1385 es
->s_last_orphan
= 0;
1386 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1390 if (s_flags
& MS_RDONLY
) {
1391 printk(KERN_INFO
"EXT3-fs: %s: orphan cleanup on readonly fs\n",
1393 sb
->s_flags
&= ~MS_RDONLY
;
1396 /* Needed for iput() to work correctly and not trash data */
1397 sb
->s_flags
|= MS_ACTIVE
;
1398 /* Turn on quotas so that they are updated correctly */
1399 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1400 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1401 int ret
= ext3_quota_on_mount(sb
, i
);
1404 "EXT3-fs: Cannot turn on journaled "
1405 "quota: error %d\n", ret
);
1410 while (es
->s_last_orphan
) {
1411 struct inode
*inode
;
1413 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1414 if (IS_ERR(inode
)) {
1415 es
->s_last_orphan
= 0;
1419 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1421 if (inode
->i_nlink
) {
1423 "%s: truncating inode %lu to %Ld bytes\n",
1424 __func__
, inode
->i_ino
, inode
->i_size
);
1425 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1426 inode
->i_ino
, inode
->i_size
);
1427 ext3_truncate(inode
);
1431 "%s: deleting unreferenced inode %lu\n",
1432 __func__
, inode
->i_ino
);
1433 jbd_debug(2, "deleting unreferenced inode %lu\n",
1437 iput(inode
); /* The delete magic happens here! */
1440 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1443 printk(KERN_INFO
"EXT3-fs: %s: %d orphan inode%s deleted\n",
1444 sb
->s_id
, PLURAL(nr_orphans
));
1446 printk(KERN_INFO
"EXT3-fs: %s: %d truncate%s cleaned up\n",
1447 sb
->s_id
, PLURAL(nr_truncates
));
1449 /* Turn quotas off */
1450 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1451 if (sb_dqopt(sb
)->files
[i
])
1452 vfs_quota_off(sb
, i
, 0);
1455 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1459 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1460 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1461 * We need to be 1 filesystem block less than the 2^32 sector limit.
1463 static loff_t
ext3_max_size(int bits
)
1465 loff_t res
= EXT3_NDIR_BLOCKS
;
1469 /* This is calculated to be the largest file size for a
1470 * dense, file such that the total number of
1471 * sectors in the file, including data and all indirect blocks,
1472 * does not exceed 2^32 -1
1473 * __u32 i_blocks representing the total number of
1474 * 512 bytes blocks of the file
1476 upper_limit
= (1LL << 32) - 1;
1478 /* total blocks in file system block size */
1479 upper_limit
>>= (bits
- 9);
1482 /* indirect blocks */
1484 /* double indirect blocks */
1485 meta_blocks
+= 1 + (1LL << (bits
-2));
1486 /* tripple indirect blocks */
1487 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1489 upper_limit
-= meta_blocks
;
1490 upper_limit
<<= bits
;
1492 res
+= 1LL << (bits
-2);
1493 res
+= 1LL << (2*(bits
-2));
1494 res
+= 1LL << (3*(bits
-2));
1496 if (res
> upper_limit
)
1499 if (res
> MAX_LFS_FILESIZE
)
1500 res
= MAX_LFS_FILESIZE
;
1505 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1506 ext3_fsblk_t logic_sb_block
,
1509 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1510 unsigned long bg
, first_meta_bg
;
1513 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1515 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1517 return (logic_sb_block
+ nr
+ 1);
1518 bg
= sbi
->s_desc_per_block
* nr
;
1519 if (ext3_bg_has_super(sb
, bg
))
1521 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1525 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1527 struct buffer_head
* bh
;
1528 struct ext3_super_block
*es
= NULL
;
1529 struct ext3_sb_info
*sbi
;
1531 ext3_fsblk_t sb_block
= get_sb_block(&data
);
1532 ext3_fsblk_t logic_sb_block
;
1533 unsigned long offset
= 0;
1534 unsigned int journal_inum
= 0;
1535 unsigned long journal_devnum
= 0;
1536 unsigned long def_mount_opts
;
1547 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1551 sbi
->s_blockgroup_lock
=
1552 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1553 if (!sbi
->s_blockgroup_lock
) {
1557 sb
->s_fs_info
= sbi
;
1558 sbi
->s_mount_opt
= 0;
1559 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1560 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1561 sbi
->s_sb_block
= sb_block
;
1565 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1567 printk(KERN_ERR
"EXT3-fs: unable to set blocksize\n");
1572 * The ext3 superblock will not be buffer aligned for other than 1kB
1573 * block sizes. We need to calculate the offset from buffer start.
1575 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1576 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1577 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1579 logic_sb_block
= sb_block
;
1582 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1583 printk (KERN_ERR
"EXT3-fs: unable to read superblock\n");
1587 * Note: s_es must be initialized as soon as possible because
1588 * some ext3 macro-instructions depend on its value
1590 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1592 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1593 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1596 /* Set defaults before we parse the mount options */
1597 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1598 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1599 set_opt(sbi
->s_mount_opt
, DEBUG
);
1600 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1601 set_opt(sbi
->s_mount_opt
, GRPID
);
1602 if (def_mount_opts
& EXT3_DEFM_UID16
)
1603 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1604 #ifdef CONFIG_EXT3_FS_XATTR
1605 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1606 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1608 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1609 if (def_mount_opts
& EXT3_DEFM_ACL
)
1610 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1612 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1613 sbi
->s_mount_opt
|= EXT3_MOUNT_JOURNAL_DATA
;
1614 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1615 sbi
->s_mount_opt
|= EXT3_MOUNT_ORDERED_DATA
;
1616 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1617 sbi
->s_mount_opt
|= EXT3_MOUNT_WRITEBACK_DATA
;
1619 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1620 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1621 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1622 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1624 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1626 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1627 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1629 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1631 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1635 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1636 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
1638 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1639 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1640 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1641 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1643 "EXT3-fs warning: feature flags set on rev 0 fs, "
1644 "running e2fsck is recommended\n");
1646 * Check feature flags regardless of the revision level, since we
1647 * previously didn't change the revision level when setting the flags,
1648 * so there is a chance incompat flags are set on a rev 0 filesystem.
1650 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1652 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount because of "
1653 "unsupported optional features (%x).\n",
1654 sb
->s_id
, le32_to_cpu(features
));
1657 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1658 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1659 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount RDWR because of "
1660 "unsupported optional features (%x).\n",
1661 sb
->s_id
, le32_to_cpu(features
));
1664 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1666 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1667 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1669 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1670 blocksize
, sb
->s_id
);
1674 hblock
= bdev_hardsect_size(sb
->s_bdev
);
1675 if (sb
->s_blocksize
!= blocksize
) {
1677 * Make sure the blocksize for the filesystem is larger
1678 * than the hardware sectorsize for the machine.
1680 if (blocksize
< hblock
) {
1681 printk(KERN_ERR
"EXT3-fs: blocksize %d too small for "
1682 "device blocksize %d.\n", blocksize
, hblock
);
1687 if (!sb_set_blocksize(sb
, blocksize
)) {
1688 printk(KERN_ERR
"EXT3-fs: bad blocksize %d.\n",
1692 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1693 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1694 bh
= sb_bread(sb
, logic_sb_block
);
1697 "EXT3-fs: Can't read superblock on 2nd try.\n");
1700 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1702 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1704 "EXT3-fs: Magic mismatch, very weird !\n");
1709 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1711 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1712 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1713 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1715 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1716 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1717 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1718 (!is_power_of_2(sbi
->s_inode_size
)) ||
1719 (sbi
->s_inode_size
> blocksize
)) {
1721 "EXT3-fs: unsupported inode size: %d\n",
1726 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1727 le32_to_cpu(es
->s_log_frag_size
);
1728 if (blocksize
!= sbi
->s_frag_size
) {
1730 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1731 sbi
->s_frag_size
, blocksize
);
1734 sbi
->s_frags_per_block
= 1;
1735 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1736 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1737 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1738 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1740 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1741 if (sbi
->s_inodes_per_block
== 0)
1743 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1744 sbi
->s_inodes_per_block
;
1745 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1747 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1748 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1749 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1750 for (i
=0; i
< 4; i
++)
1751 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1752 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1754 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1756 "EXT3-fs: #blocks per group too big: %lu\n",
1757 sbi
->s_blocks_per_group
);
1760 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1762 "EXT3-fs: #fragments per group too big: %lu\n",
1763 sbi
->s_frags_per_group
);
1766 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1768 "EXT3-fs: #inodes per group too big: %lu\n",
1769 sbi
->s_inodes_per_group
);
1773 if (le32_to_cpu(es
->s_blocks_count
) >
1774 (sector_t
)(~0ULL) >> (sb
->s_blocksize_bits
- 9)) {
1775 printk(KERN_ERR
"EXT3-fs: filesystem on %s:"
1776 " too large to mount safely\n", sb
->s_id
);
1777 if (sizeof(sector_t
) < 8)
1778 printk(KERN_WARNING
"EXT3-fs: CONFIG_LBD not "
1783 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1785 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1786 le32_to_cpu(es
->s_first_data_block
) - 1)
1787 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1788 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1789 EXT3_DESC_PER_BLOCK(sb
);
1790 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1792 if (sbi
->s_group_desc
== NULL
) {
1793 printk (KERN_ERR
"EXT3-fs: not enough memory\n");
1797 bgl_lock_init(sbi
->s_blockgroup_lock
);
1799 for (i
= 0; i
< db_count
; i
++) {
1800 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1801 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1802 if (!sbi
->s_group_desc
[i
]) {
1803 printk (KERN_ERR
"EXT3-fs: "
1804 "can't read group descriptor %d\n", i
);
1809 if (!ext3_check_descriptors (sb
)) {
1810 printk(KERN_ERR
"EXT3-fs: group descriptors corrupted!\n");
1813 sbi
->s_gdb_count
= db_count
;
1814 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1815 spin_lock_init(&sbi
->s_next_gen_lock
);
1817 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1818 ext3_count_free_blocks(sb
));
1820 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1821 ext3_count_free_inodes(sb
));
1824 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1825 ext3_count_dirs(sb
));
1828 printk(KERN_ERR
"EXT3-fs: insufficient memory\n");
1832 /* per fileystem reservation list head & lock */
1833 spin_lock_init(&sbi
->s_rsv_window_lock
);
1834 sbi
->s_rsv_window_root
= RB_ROOT
;
1835 /* Add a single, static dummy reservation to the start of the
1836 * reservation window list --- it gives us a placeholder for
1837 * append-at-start-of-list which makes the allocation logic
1838 * _much_ simpler. */
1839 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1840 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1841 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1842 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1843 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1846 * set up enough so that it can read an inode
1848 sb
->s_op
= &ext3_sops
;
1849 sb
->s_export_op
= &ext3_export_ops
;
1850 sb
->s_xattr
= ext3_xattr_handlers
;
1852 sb
->s_qcop
= &ext3_qctl_operations
;
1853 sb
->dq_op
= &ext3_quota_operations
;
1855 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1859 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1860 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1861 EXT3_FEATURE_INCOMPAT_RECOVER
));
1864 * The first inode we look at is the journal inode. Don't try
1865 * root first: it may be modified in the journal!
1867 if (!test_opt(sb
, NOLOAD
) &&
1868 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1869 if (ext3_load_journal(sb
, es
, journal_devnum
))
1871 } else if (journal_inum
) {
1872 if (ext3_create_journal(sb
, es
, journal_inum
))
1877 "ext3: No journal on filesystem on %s\n",
1882 /* We have now updated the journal if required, so we can
1883 * validate the data journaling mode. */
1884 switch (test_opt(sb
, DATA_FLAGS
)) {
1886 /* No mode set, assume a default based on the journal
1887 capabilities: ORDERED_DATA if the journal can
1888 cope, else JOURNAL_DATA */
1889 if (journal_check_available_features
1890 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1891 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1893 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1896 case EXT3_MOUNT_ORDERED_DATA
:
1897 case EXT3_MOUNT_WRITEBACK_DATA
:
1898 if (!journal_check_available_features
1899 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1900 printk(KERN_ERR
"EXT3-fs: Journal does not support "
1901 "requested data journaling mode\n");
1908 if (test_opt(sb
, NOBH
)) {
1909 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1910 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option - "
1911 "its supported only with writeback mode\n");
1912 clear_opt(sbi
->s_mount_opt
, NOBH
);
1916 * The journal_load will have done any necessary log recovery,
1917 * so we can safely mount the rest of the filesystem now.
1920 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
1922 printk(KERN_ERR
"EXT3-fs: get root inode failed\n");
1923 ret
= PTR_ERR(root
);
1926 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1928 printk(KERN_ERR
"EXT3-fs: corrupt root inode, run e2fsck\n");
1931 sb
->s_root
= d_alloc_root(root
);
1933 printk(KERN_ERR
"EXT3-fs: get root dentry failed\n");
1939 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
1941 * akpm: core read_super() calls in here with the superblock locked.
1942 * That deadlocks, because orphan cleanup needs to lock the superblock
1943 * in numerous places. Here we just pop the lock - it's relatively
1944 * harmless, because we are now ready to accept write_super() requests,
1945 * and aviro says that's the only reason for hanging onto the
1948 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
1949 ext3_orphan_cleanup(sb
, es
);
1950 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
1952 printk (KERN_INFO
"EXT3-fs: recovery complete.\n");
1953 ext3_mark_recovery_complete(sb
, es
);
1954 printk (KERN_INFO
"EXT3-fs: mounted filesystem with %s data mode.\n",
1955 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
1956 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
1964 printk(KERN_ERR
"VFS: Can't find ext3 filesystem on dev %s.\n",
1969 journal_destroy(sbi
->s_journal
);
1971 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
1972 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
1973 percpu_counter_destroy(&sbi
->s_dirs_counter
);
1975 for (i
= 0; i
< db_count
; i
++)
1976 brelse(sbi
->s_group_desc
[i
]);
1977 kfree(sbi
->s_group_desc
);
1980 for (i
= 0; i
< MAXQUOTAS
; i
++)
1981 kfree(sbi
->s_qf_names
[i
]);
1983 ext3_blkdev_remove(sbi
);
1986 sb
->s_fs_info
= NULL
;
1993 * Setup any per-fs journal parameters now. We'll do this both on
1994 * initial mount, once the journal has been initialised but before we've
1995 * done any recovery; and again on any subsequent remount.
1997 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
1999 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2001 if (sbi
->s_commit_interval
)
2002 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2003 /* We could also set up an ext3-specific default for the commit
2004 * interval here, but for now we'll just fall back to the jbd
2007 spin_lock(&journal
->j_state_lock
);
2008 if (test_opt(sb
, BARRIER
))
2009 journal
->j_flags
|= JFS_BARRIER
;
2011 journal
->j_flags
&= ~JFS_BARRIER
;
2012 if (test_opt(sb
, DATA_ERR_ABORT
))
2013 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2015 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2016 spin_unlock(&journal
->j_state_lock
);
2019 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2020 unsigned int journal_inum
)
2022 struct inode
*journal_inode
;
2025 /* First, test for the existence of a valid inode on disk. Bad
2026 * things happen if we iget() an unused inode, as the subsequent
2027 * iput() will try to delete it. */
2029 journal_inode
= ext3_iget(sb
, journal_inum
);
2030 if (IS_ERR(journal_inode
)) {
2031 printk(KERN_ERR
"EXT3-fs: no journal found.\n");
2034 if (!journal_inode
->i_nlink
) {
2035 make_bad_inode(journal_inode
);
2036 iput(journal_inode
);
2037 printk(KERN_ERR
"EXT3-fs: journal inode is deleted.\n");
2041 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2042 journal_inode
, journal_inode
->i_size
);
2043 if (!S_ISREG(journal_inode
->i_mode
)) {
2044 printk(KERN_ERR
"EXT3-fs: invalid journal inode.\n");
2045 iput(journal_inode
);
2049 journal
= journal_init_inode(journal_inode
);
2051 printk(KERN_ERR
"EXT3-fs: Could not load journal inode\n");
2052 iput(journal_inode
);
2055 journal
->j_private
= sb
;
2056 ext3_init_journal_params(sb
, journal
);
2060 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2063 struct buffer_head
* bh
;
2067 int hblock
, blocksize
;
2068 ext3_fsblk_t sb_block
;
2069 unsigned long offset
;
2070 struct ext3_super_block
* es
;
2071 struct block_device
*bdev
;
2073 bdev
= ext3_blkdev_get(j_dev
);
2077 if (bd_claim(bdev
, sb
)) {
2079 "EXT3: failed to claim external journal device.\n");
2080 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
2084 blocksize
= sb
->s_blocksize
;
2085 hblock
= bdev_hardsect_size(bdev
);
2086 if (blocksize
< hblock
) {
2088 "EXT3-fs: blocksize too small for journal device.\n");
2092 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2093 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2094 set_blocksize(bdev
, blocksize
);
2095 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2096 printk(KERN_ERR
"EXT3-fs: couldn't read superblock of "
2097 "external journal\n");
2101 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
2102 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2103 !(le32_to_cpu(es
->s_feature_incompat
) &
2104 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2105 printk(KERN_ERR
"EXT3-fs: external journal has "
2106 "bad superblock\n");
2111 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2112 printk(KERN_ERR
"EXT3-fs: journal UUID does not match\n");
2117 len
= le32_to_cpu(es
->s_blocks_count
);
2118 start
= sb_block
+ 1;
2119 brelse(bh
); /* we're done with the superblock */
2121 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2122 start
, len
, blocksize
);
2124 printk(KERN_ERR
"EXT3-fs: failed to create device journal\n");
2127 journal
->j_private
= sb
;
2128 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
2129 wait_on_buffer(journal
->j_sb_buffer
);
2130 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
2131 printk(KERN_ERR
"EXT3-fs: I/O error on journal device\n");
2134 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2135 printk(KERN_ERR
"EXT3-fs: External journal has more than one "
2136 "user (unsupported) - %d\n",
2137 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2140 EXT3_SB(sb
)->journal_bdev
= bdev
;
2141 ext3_init_journal_params(sb
, journal
);
2144 journal_destroy(journal
);
2146 ext3_blkdev_put(bdev
);
2150 static int ext3_load_journal(struct super_block
*sb
,
2151 struct ext3_super_block
*es
,
2152 unsigned long journal_devnum
)
2155 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2158 int really_read_only
;
2160 if (journal_devnum
&&
2161 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2162 printk(KERN_INFO
"EXT3-fs: external journal device major/minor "
2163 "numbers have changed\n");
2164 journal_dev
= new_decode_dev(journal_devnum
);
2166 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2168 really_read_only
= bdev_read_only(sb
->s_bdev
);
2171 * Are we loading a blank journal or performing recovery after a
2172 * crash? For recovery, we need to check in advance whether we
2173 * can get read-write access to the device.
2176 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2177 if (sb
->s_flags
& MS_RDONLY
) {
2178 printk(KERN_INFO
"EXT3-fs: INFO: recovery "
2179 "required on readonly filesystem.\n");
2180 if (really_read_only
) {
2181 printk(KERN_ERR
"EXT3-fs: write access "
2182 "unavailable, cannot proceed.\n");
2185 printk (KERN_INFO
"EXT3-fs: write access will "
2186 "be enabled during recovery.\n");
2190 if (journal_inum
&& journal_dev
) {
2191 printk(KERN_ERR
"EXT3-fs: filesystem has both journal "
2192 "and inode journals!\n");
2197 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2200 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2204 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2205 err
= journal_update_format(journal
);
2207 printk(KERN_ERR
"EXT3-fs: error updating journal.\n");
2208 journal_destroy(journal
);
2213 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2214 err
= journal_wipe(journal
, !really_read_only
);
2216 err
= journal_load(journal
);
2219 printk(KERN_ERR
"EXT3-fs: error loading journal.\n");
2220 journal_destroy(journal
);
2224 EXT3_SB(sb
)->s_journal
= journal
;
2225 ext3_clear_journal_err(sb
, es
);
2227 if (journal_devnum
&&
2228 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2229 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2232 /* Make sure we flush the recovery flag to disk. */
2233 ext3_commit_super(sb
, es
, 1);
2239 static int ext3_create_journal(struct super_block
* sb
,
2240 struct ext3_super_block
* es
,
2241 unsigned int journal_inum
)
2246 if (sb
->s_flags
& MS_RDONLY
) {
2247 printk(KERN_ERR
"EXT3-fs: readonly filesystem when trying to "
2248 "create journal.\n");
2252 journal
= ext3_get_journal(sb
, journal_inum
);
2256 printk(KERN_INFO
"EXT3-fs: creating new journal on inode %u\n",
2259 err
= journal_create(journal
);
2261 printk(KERN_ERR
"EXT3-fs: error creating journal.\n");
2262 journal_destroy(journal
);
2266 EXT3_SB(sb
)->s_journal
= journal
;
2268 ext3_update_dynamic_rev(sb
);
2269 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2270 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2272 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2275 /* Make sure we flush the recovery flag to disk. */
2276 ext3_commit_super(sb
, es
, 1);
2281 static void ext3_commit_super (struct super_block
* sb
,
2282 struct ext3_super_block
* es
,
2285 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2289 es
->s_wtime
= cpu_to_le32(get_seconds());
2290 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2291 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2292 BUFFER_TRACE(sbh
, "marking dirty");
2293 mark_buffer_dirty(sbh
);
2295 sync_dirty_buffer(sbh
);
2300 * Have we just finished recovery? If so, and if we are mounting (or
2301 * remounting) the filesystem readonly, then we will end up with a
2302 * consistent fs on disk. Record that fact.
2304 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2305 struct ext3_super_block
* es
)
2307 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2309 journal_lock_updates(journal
);
2310 if (journal_flush(journal
) < 0)
2314 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2315 sb
->s_flags
& MS_RDONLY
) {
2316 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2318 ext3_commit_super(sb
, es
, 1);
2323 journal_unlock_updates(journal
);
2327 * If we are mounting (or read-write remounting) a filesystem whose journal
2328 * has recorded an error from a previous lifetime, move that error to the
2329 * main filesystem now.
2331 static void ext3_clear_journal_err(struct super_block
* sb
,
2332 struct ext3_super_block
* es
)
2338 journal
= EXT3_SB(sb
)->s_journal
;
2341 * Now check for any error status which may have been recorded in the
2342 * journal by a prior ext3_error() or ext3_abort()
2345 j_errno
= journal_errno(journal
);
2349 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2350 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2351 "from previous mount: %s", errstr
);
2352 ext3_warning(sb
, __func__
, "Marking fs in need of "
2353 "filesystem check.");
2355 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2356 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2357 ext3_commit_super (sb
, es
, 1);
2359 journal_clear_err(journal
);
2364 * Force the running and committing transactions to commit,
2365 * and wait on the commit.
2367 int ext3_force_commit(struct super_block
*sb
)
2372 if (sb
->s_flags
& MS_RDONLY
)
2375 journal
= EXT3_SB(sb
)->s_journal
;
2377 ret
= ext3_journal_force_commit(journal
);
2382 * Ext3 always journals updates to the superblock itself, so we don't
2383 * have to propagate any other updates to the superblock on disk at this
2384 * point. (We can probably nuke this function altogether, and remove
2385 * any mention to sb->s_dirt in all of fs/ext3; eventual cleanup...)
2387 static void ext3_write_super (struct super_block
* sb
)
2389 if (mutex_trylock(&sb
->s_lock
) != 0)
2394 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2398 ext3_force_commit(sb
);
2400 journal_start_commit(EXT3_SB(sb
)->s_journal
, NULL
);
2406 * LVM calls this function before a (read-only) snapshot is created. This
2407 * gives us a chance to flush the journal completely and mark the fs clean.
2409 static void ext3_write_super_lockfs(struct super_block
*sb
)
2413 if (!(sb
->s_flags
& MS_RDONLY
)) {
2414 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2416 /* Now we set up the journal barrier. */
2417 journal_lock_updates(journal
);
2420 * We don't want to clear needs_recovery flag when we failed
2421 * to flush the journal.
2423 if (journal_flush(journal
) < 0)
2426 /* Journal blocked and flushed, clear needs_recovery flag. */
2427 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2428 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2433 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2434 * flag here, even though the filesystem is not technically dirty yet.
2436 static void ext3_unlockfs(struct super_block
*sb
)
2438 if (!(sb
->s_flags
& MS_RDONLY
)) {
2440 /* Reser the needs_recovery flag before the fs is unlocked. */
2441 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2442 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2444 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2448 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2450 struct ext3_super_block
* es
;
2451 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2452 ext3_fsblk_t n_blocks_count
= 0;
2453 unsigned long old_sb_flags
;
2454 struct ext3_mount_options old_opts
;
2460 /* Store the original options */
2461 old_sb_flags
= sb
->s_flags
;
2462 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2463 old_opts
.s_resuid
= sbi
->s_resuid
;
2464 old_opts
.s_resgid
= sbi
->s_resgid
;
2465 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2467 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2468 for (i
= 0; i
< MAXQUOTAS
; i
++)
2469 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2473 * Allow the "check" option to be passed as a remount option.
2475 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2480 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
)
2481 ext3_abort(sb
, __func__
, "Abort forced by user");
2483 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2484 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
2488 ext3_init_journal_params(sb
, sbi
->s_journal
);
2490 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2491 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2492 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
) {
2497 if (*flags
& MS_RDONLY
) {
2499 * First of all, the unconditional stuff we have to do
2500 * to disable replay of the journal when we next remount
2502 sb
->s_flags
|= MS_RDONLY
;
2505 * OK, test if we are remounting a valid rw partition
2506 * readonly, and if so set the rdonly flag and then
2507 * mark the partition as valid again.
2509 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2510 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2511 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2514 * We have to unlock super so that we can wait for
2518 ext3_mark_recovery_complete(sb
, es
);
2522 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2523 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2524 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2525 "remount RDWR because of unsupported "
2526 "optional features (%x).\n",
2527 sb
->s_id
, le32_to_cpu(ret
));
2533 * If we have an unprocessed orphan list hanging
2534 * around from a previously readonly bdev mount,
2535 * require a full umount/remount for now.
2537 if (es
->s_last_orphan
) {
2538 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2539 "remount RDWR because of unprocessed "
2540 "orphan inode list. Please "
2541 "umount/remount instead.\n",
2548 * Mounting a RDONLY partition read-write, so reread
2549 * and store the current valid flag. (It may have
2550 * been changed by e2fsck since we originally mounted
2553 ext3_clear_journal_err(sb
, es
);
2554 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2555 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2557 if (!ext3_setup_super (sb
, es
, 0))
2558 sb
->s_flags
&= ~MS_RDONLY
;
2562 /* Release old quota file names */
2563 for (i
= 0; i
< MAXQUOTAS
; i
++)
2564 if (old_opts
.s_qf_names
[i
] &&
2565 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2566 kfree(old_opts
.s_qf_names
[i
]);
2570 sb
->s_flags
= old_sb_flags
;
2571 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2572 sbi
->s_resuid
= old_opts
.s_resuid
;
2573 sbi
->s_resgid
= old_opts
.s_resgid
;
2574 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2576 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2577 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2578 if (sbi
->s_qf_names
[i
] &&
2579 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2580 kfree(sbi
->s_qf_names
[i
]);
2581 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2587 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2589 struct super_block
*sb
= dentry
->d_sb
;
2590 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2591 struct ext3_super_block
*es
= sbi
->s_es
;
2594 if (test_opt(sb
, MINIX_DF
)) {
2595 sbi
->s_overhead_last
= 0;
2596 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2597 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2598 ext3_fsblk_t overhead
= 0;
2602 * Compute the overhead (FS structures). This is constant
2603 * for a given filesystem unless the number of block groups
2604 * changes so we cache the previous value until it does.
2608 * All of the blocks before first_data_block are
2611 overhead
= le32_to_cpu(es
->s_first_data_block
);
2614 * Add the overhead attributed to the superblock and
2615 * block group descriptors. If the sparse superblocks
2616 * feature is turned on, then not all groups have this.
2618 for (i
= 0; i
< ngroups
; i
++) {
2619 overhead
+= ext3_bg_has_super(sb
, i
) +
2620 ext3_bg_num_gdb(sb
, i
);
2625 * Every block group has an inode bitmap, a block
2626 * bitmap, and an inode table.
2628 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2629 sbi
->s_overhead_last
= overhead
;
2631 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2634 buf
->f_type
= EXT3_SUPER_MAGIC
;
2635 buf
->f_bsize
= sb
->s_blocksize
;
2636 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2637 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2638 es
->s_free_blocks_count
= cpu_to_le32(buf
->f_bfree
);
2639 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2640 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2642 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2643 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2644 es
->s_free_inodes_count
= cpu_to_le32(buf
->f_ffree
);
2645 buf
->f_namelen
= EXT3_NAME_LEN
;
2646 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2647 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2648 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2649 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2653 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2654 * is locked for write. Otherwise the are possible deadlocks:
2655 * Process 1 Process 2
2656 * ext3_create() quota_sync()
2657 * journal_start() write_dquot()
2658 * DQUOT_INIT() down(dqio_mutex)
2659 * down(dqio_mutex) journal_start()
2665 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2667 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2670 static int ext3_dquot_initialize(struct inode
*inode
, int type
)
2675 /* We may create quota structure so we need to reserve enough blocks */
2676 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_INIT_BLOCKS(inode
->i_sb
));
2678 return PTR_ERR(handle
);
2679 ret
= dquot_initialize(inode
, type
);
2680 err
= ext3_journal_stop(handle
);
2686 static int ext3_dquot_drop(struct inode
*inode
)
2691 /* We may delete quota structure so we need to reserve enough blocks */
2692 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_DEL_BLOCKS(inode
->i_sb
));
2693 if (IS_ERR(handle
)) {
2695 * We call dquot_drop() anyway to at least release references
2696 * to quota structures so that umount does not hang.
2699 return PTR_ERR(handle
);
2701 ret
= dquot_drop(inode
);
2702 err
= ext3_journal_stop(handle
);
2708 static int ext3_write_dquot(struct dquot
*dquot
)
2712 struct inode
*inode
;
2714 inode
= dquot_to_inode(dquot
);
2715 handle
= ext3_journal_start(inode
,
2716 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2718 return PTR_ERR(handle
);
2719 ret
= dquot_commit(dquot
);
2720 err
= ext3_journal_stop(handle
);
2726 static int ext3_acquire_dquot(struct dquot
*dquot
)
2731 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2732 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2734 return PTR_ERR(handle
);
2735 ret
= dquot_acquire(dquot
);
2736 err
= ext3_journal_stop(handle
);
2742 static int ext3_release_dquot(struct dquot
*dquot
)
2747 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2748 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2749 if (IS_ERR(handle
)) {
2750 /* Release dquot anyway to avoid endless cycle in dqput() */
2751 dquot_release(dquot
);
2752 return PTR_ERR(handle
);
2754 ret
= dquot_release(dquot
);
2755 err
= ext3_journal_stop(handle
);
2761 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2763 /* Are we journaling quotas? */
2764 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2765 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2766 dquot_mark_dquot_dirty(dquot
);
2767 return ext3_write_dquot(dquot
);
2769 return dquot_mark_dquot_dirty(dquot
);
2773 static int ext3_write_info(struct super_block
*sb
, int type
)
2778 /* Data block + inode block */
2779 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2781 return PTR_ERR(handle
);
2782 ret
= dquot_commit_info(sb
, type
);
2783 err
= ext3_journal_stop(handle
);
2790 * Turn on quotas during mount time - we need to find
2791 * the quota file and such...
2793 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2795 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2796 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2800 * Standard function to be called on quota_on
2802 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2803 char *name
, int remount
)
2808 if (!test_opt(sb
, QUOTA
))
2810 /* When remounting, no checks are needed and in fact, name is NULL */
2812 return vfs_quota_on(sb
, type
, format_id
, name
, remount
);
2814 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2818 /* Quotafile not on the same filesystem? */
2819 if (path
.mnt
->mnt_sb
!= sb
) {
2823 /* Journaling quota? */
2824 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2825 /* Quotafile not of fs root? */
2826 if (path
.dentry
->d_parent
!= sb
->s_root
)
2828 "EXT3-fs: Quota file not on filesystem root. "
2829 "Journaled quota will not work.\n");
2833 * When we journal data on quota file, we have to flush journal to see
2834 * all updates to the file when we bypass pagecache...
2836 if (ext3_should_journal_data(path
.dentry
->d_inode
)) {
2838 * We don't need to lock updates but journal_flush() could
2839 * otherwise be livelocked...
2841 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2842 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2843 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2850 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2855 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2856 * acquiring the locks... As quota files are never truncated and quota code
2857 * itself serializes the operations (and noone else should touch the files)
2858 * we don't have to be afraid of races */
2859 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2860 size_t len
, loff_t off
)
2862 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2863 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2865 int offset
= off
& (sb
->s_blocksize
- 1);
2868 struct buffer_head
*bh
;
2869 loff_t i_size
= i_size_read(inode
);
2873 if (off
+len
> i_size
)
2876 while (toread
> 0) {
2877 tocopy
= sb
->s_blocksize
- offset
< toread
?
2878 sb
->s_blocksize
- offset
: toread
;
2879 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2882 if (!bh
) /* A hole? */
2883 memset(data
, 0, tocopy
);
2885 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2895 /* Write to quotafile (we know the transaction is already started and has
2896 * enough credits) */
2897 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2898 const char *data
, size_t len
, loff_t off
)
2900 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2901 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2903 int offset
= off
& (sb
->s_blocksize
- 1);
2905 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2906 size_t towrite
= len
;
2907 struct buffer_head
*bh
;
2908 handle_t
*handle
= journal_current_handle();
2911 printk(KERN_WARNING
"EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2912 " cancelled because transaction is not started.\n",
2913 (unsigned long long)off
, (unsigned long long)len
);
2916 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2917 while (towrite
> 0) {
2918 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2919 sb
->s_blocksize
- offset
: towrite
;
2920 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2923 if (journal_quota
) {
2924 err
= ext3_journal_get_write_access(handle
, bh
);
2931 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2932 flush_dcache_page(bh
->b_page
);
2935 err
= ext3_journal_dirty_metadata(handle
, bh
);
2937 /* Always do at least ordered writes for quotas */
2938 err
= ext3_journal_dirty_data(handle
, bh
);
2939 mark_buffer_dirty(bh
);
2950 if (len
== towrite
) {
2951 mutex_unlock(&inode
->i_mutex
);
2954 if (inode
->i_size
< off
+len
-towrite
) {
2955 i_size_write(inode
, off
+len
-towrite
);
2956 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
2959 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2960 ext3_mark_inode_dirty(handle
, inode
);
2961 mutex_unlock(&inode
->i_mutex
);
2962 return len
- towrite
;
2967 static int ext3_get_sb(struct file_system_type
*fs_type
,
2968 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
2970 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
, mnt
);
2973 static struct file_system_type ext3_fs_type
= {
2974 .owner
= THIS_MODULE
,
2976 .get_sb
= ext3_get_sb
,
2977 .kill_sb
= kill_block_super
,
2978 .fs_flags
= FS_REQUIRES_DEV
,
2981 static int __init
init_ext3_fs(void)
2983 int err
= init_ext3_xattr();
2986 err
= init_inodecache();
2989 err
= register_filesystem(&ext3_fs_type
);
2994 destroy_inodecache();
3000 static void __exit
exit_ext3_fs(void)
3002 unregister_filesystem(&ext3_fs_type
);
3003 destroy_inodecache();
3007 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3008 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3009 MODULE_LICENSE("GPL");
3010 module_init(init_ext3_fs
)
3011 module_exit(exit_ext3_fs
)