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 int 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 int ext3_unfreeze(struct super_block
*sb
);
64 static void ext3_write_super (struct super_block
* sb
);
65 static int ext3_freeze(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 * Try to release metadata pages (indirect blocks, directories) which are
688 * mapped via the block device. Since these pages could have journal heads
689 * which would prevent try_to_free_buffers() from freeing them, we must use
690 * jbd layer's try_to_free_buffers() function to release them.
692 static int bdev_try_to_free_page(struct super_block
*sb
, struct page
*page
,
695 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
697 WARN_ON(PageChecked(page
));
698 if (!page_has_buffers(page
))
701 return journal_try_to_free_buffers(journal
, page
,
703 return try_to_free_buffers(page
);
707 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
708 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
710 static int ext3_write_dquot(struct dquot
*dquot
);
711 static int ext3_acquire_dquot(struct dquot
*dquot
);
712 static int ext3_release_dquot(struct dquot
*dquot
);
713 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
714 static int ext3_write_info(struct super_block
*sb
, int type
);
715 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
716 char *path
, int remount
);
717 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
718 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
719 size_t len
, loff_t off
);
720 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
721 const char *data
, size_t len
, loff_t off
);
723 static struct dquot_operations ext3_quota_operations
= {
724 .initialize
= dquot_initialize
,
726 .alloc_space
= dquot_alloc_space
,
727 .alloc_inode
= dquot_alloc_inode
,
728 .free_space
= dquot_free_space
,
729 .free_inode
= dquot_free_inode
,
730 .transfer
= dquot_transfer
,
731 .write_dquot
= ext3_write_dquot
,
732 .acquire_dquot
= ext3_acquire_dquot
,
733 .release_dquot
= ext3_release_dquot
,
734 .mark_dirty
= ext3_mark_dquot_dirty
,
735 .write_info
= ext3_write_info
,
736 .alloc_dquot
= dquot_alloc
,
737 .destroy_dquot
= dquot_destroy
,
740 static struct quotactl_ops ext3_qctl_operations
= {
741 .quota_on
= ext3_quota_on
,
742 .quota_off
= vfs_quota_off
,
743 .quota_sync
= vfs_quota_sync
,
744 .get_info
= vfs_get_dqinfo
,
745 .set_info
= vfs_set_dqinfo
,
746 .get_dqblk
= vfs_get_dqblk
,
747 .set_dqblk
= vfs_set_dqblk
751 static const struct super_operations ext3_sops
= {
752 .alloc_inode
= ext3_alloc_inode
,
753 .destroy_inode
= ext3_destroy_inode
,
754 .write_inode
= ext3_write_inode
,
755 .dirty_inode
= ext3_dirty_inode
,
756 .delete_inode
= ext3_delete_inode
,
757 .put_super
= ext3_put_super
,
758 .write_super
= ext3_write_super
,
759 .sync_fs
= ext3_sync_fs
,
760 .freeze_fs
= ext3_freeze
,
761 .unfreeze_fs
= ext3_unfreeze
,
762 .statfs
= ext3_statfs
,
763 .remount_fs
= ext3_remount
,
764 .clear_inode
= ext3_clear_inode
,
765 .show_options
= ext3_show_options
,
767 .quota_read
= ext3_quota_read
,
768 .quota_write
= ext3_quota_write
,
770 .bdev_try_to_free_page
= bdev_try_to_free_page
,
773 static const struct export_operations ext3_export_ops
= {
774 .fh_to_dentry
= ext3_fh_to_dentry
,
775 .fh_to_parent
= ext3_fh_to_parent
,
776 .get_parent
= ext3_get_parent
,
780 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
781 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
782 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
783 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
784 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
, Opt_bh
,
785 Opt_commit
, Opt_journal_update
, Opt_journal_inum
, Opt_journal_dev
,
786 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
787 Opt_data_err_abort
, Opt_data_err_ignore
,
788 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
789 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_quota
, Opt_noquota
,
790 Opt_ignore
, Opt_barrier
, Opt_err
, Opt_resize
, Opt_usrquota
,
794 static const match_table_t tokens
= {
795 {Opt_bsd_df
, "bsddf"},
796 {Opt_minix_df
, "minixdf"},
797 {Opt_grpid
, "grpid"},
798 {Opt_grpid
, "bsdgroups"},
799 {Opt_nogrpid
, "nogrpid"},
800 {Opt_nogrpid
, "sysvgroups"},
801 {Opt_resgid
, "resgid=%u"},
802 {Opt_resuid
, "resuid=%u"},
804 {Opt_err_cont
, "errors=continue"},
805 {Opt_err_panic
, "errors=panic"},
806 {Opt_err_ro
, "errors=remount-ro"},
807 {Opt_nouid32
, "nouid32"},
808 {Opt_nocheck
, "nocheck"},
809 {Opt_nocheck
, "check=none"},
810 {Opt_debug
, "debug"},
811 {Opt_oldalloc
, "oldalloc"},
812 {Opt_orlov
, "orlov"},
813 {Opt_user_xattr
, "user_xattr"},
814 {Opt_nouser_xattr
, "nouser_xattr"},
816 {Opt_noacl
, "noacl"},
817 {Opt_reservation
, "reservation"},
818 {Opt_noreservation
, "noreservation"},
819 {Opt_noload
, "noload"},
822 {Opt_commit
, "commit=%u"},
823 {Opt_journal_update
, "journal=update"},
824 {Opt_journal_inum
, "journal=%u"},
825 {Opt_journal_dev
, "journal_dev=%u"},
826 {Opt_abort
, "abort"},
827 {Opt_data_journal
, "data=journal"},
828 {Opt_data_ordered
, "data=ordered"},
829 {Opt_data_writeback
, "data=writeback"},
830 {Opt_data_err_abort
, "data_err=abort"},
831 {Opt_data_err_ignore
, "data_err=ignore"},
832 {Opt_offusrjquota
, "usrjquota="},
833 {Opt_usrjquota
, "usrjquota=%s"},
834 {Opt_offgrpjquota
, "grpjquota="},
835 {Opt_grpjquota
, "grpjquota=%s"},
836 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
837 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
838 {Opt_grpquota
, "grpquota"},
839 {Opt_noquota
, "noquota"},
840 {Opt_quota
, "quota"},
841 {Opt_usrquota
, "usrquota"},
842 {Opt_barrier
, "barrier=%u"},
843 {Opt_resize
, "resize"},
847 static ext3_fsblk_t
get_sb_block(void **data
)
849 ext3_fsblk_t sb_block
;
850 char *options
= (char *) *data
;
852 if (!options
|| strncmp(options
, "sb=", 3) != 0)
853 return 1; /* Default location */
855 /*todo: use simple_strtoll with >32bit ext3 */
856 sb_block
= simple_strtoul(options
, &options
, 0);
857 if (*options
&& *options
!= ',') {
858 printk("EXT3-fs: Invalid sb specification: %s\n",
864 *data
= (void *) options
;
868 static int parse_options (char *options
, struct super_block
*sb
,
869 unsigned int *inum
, unsigned long *journal_devnum
,
870 ext3_fsblk_t
*n_blocks_count
, int is_remount
)
872 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
874 substring_t args
[MAX_OPT_ARGS
];
885 while ((p
= strsep (&options
, ",")) != NULL
) {
890 token
= match_token(p
, tokens
, args
);
893 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
896 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
899 set_opt (sbi
->s_mount_opt
, GRPID
);
902 clear_opt (sbi
->s_mount_opt
, GRPID
);
905 if (match_int(&args
[0], &option
))
907 sbi
->s_resuid
= option
;
910 if (match_int(&args
[0], &option
))
912 sbi
->s_resgid
= option
;
915 /* handled by get_sb_block() instead of here */
916 /* *sb_block = match_int(&args[0]); */
919 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
920 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
921 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
924 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
925 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
926 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
929 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
930 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
931 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
934 set_opt (sbi
->s_mount_opt
, NO_UID32
);
937 clear_opt (sbi
->s_mount_opt
, CHECK
);
940 set_opt (sbi
->s_mount_opt
, DEBUG
);
943 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
946 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
948 #ifdef CONFIG_EXT3_FS_XATTR
950 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
952 case Opt_nouser_xattr
:
953 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
957 case Opt_nouser_xattr
:
958 printk("EXT3 (no)user_xattr options not supported\n");
961 #ifdef CONFIG_EXT3_FS_POSIX_ACL
963 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
966 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
971 printk("EXT3 (no)acl options not supported\n");
974 case Opt_reservation
:
975 set_opt(sbi
->s_mount_opt
, RESERVATION
);
977 case Opt_noreservation
:
978 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
980 case Opt_journal_update
:
982 /* Eventually we will want to be able to create
983 a journal file here. For now, only allow the
984 user to specify an existing inode to be the
987 printk(KERN_ERR
"EXT3-fs: cannot specify "
988 "journal on remount\n");
991 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
993 case Opt_journal_inum
:
995 printk(KERN_ERR
"EXT3-fs: cannot specify "
996 "journal on remount\n");
999 if (match_int(&args
[0], &option
))
1003 case Opt_journal_dev
:
1005 printk(KERN_ERR
"EXT3-fs: cannot specify "
1006 "journal on remount\n");
1009 if (match_int(&args
[0], &option
))
1011 *journal_devnum
= option
;
1014 set_opt (sbi
->s_mount_opt
, NOLOAD
);
1017 if (match_int(&args
[0], &option
))
1022 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
1023 sbi
->s_commit_interval
= HZ
* option
;
1025 case Opt_data_journal
:
1026 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
1028 case Opt_data_ordered
:
1029 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
1031 case Opt_data_writeback
:
1032 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
1035 if ((sbi
->s_mount_opt
& EXT3_MOUNT_DATA_FLAGS
)
1038 "EXT3-fs: cannot change data "
1039 "mode on remount\n");
1043 sbi
->s_mount_opt
&= ~EXT3_MOUNT_DATA_FLAGS
;
1044 sbi
->s_mount_opt
|= data_opt
;
1047 case Opt_data_err_abort
:
1048 set_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1050 case Opt_data_err_ignore
:
1051 clear_opt(sbi
->s_mount_opt
, DATA_ERR_ABORT
);
1060 if (sb_any_quota_loaded(sb
) &&
1061 !sbi
->s_qf_names
[qtype
]) {
1063 "EXT3-fs: Cannot change journaled "
1064 "quota options when quota turned on.\n");
1067 qname
= match_strdup(&args
[0]);
1070 "EXT3-fs: not enough memory for "
1071 "storing quotafile name.\n");
1074 if (sbi
->s_qf_names
[qtype
] &&
1075 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
1077 "EXT3-fs: %s quota file already "
1078 "specified.\n", QTYPE2NAME(qtype
));
1082 sbi
->s_qf_names
[qtype
] = qname
;
1083 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
1085 "EXT3-fs: quotafile must be on "
1086 "filesystem root.\n");
1087 kfree(sbi
->s_qf_names
[qtype
]);
1088 sbi
->s_qf_names
[qtype
] = NULL
;
1091 set_opt(sbi
->s_mount_opt
, QUOTA
);
1093 case Opt_offusrjquota
:
1096 case Opt_offgrpjquota
:
1099 if (sb_any_quota_loaded(sb
) &&
1100 sbi
->s_qf_names
[qtype
]) {
1101 printk(KERN_ERR
"EXT3-fs: Cannot change "
1102 "journaled quota options when "
1103 "quota turned on.\n");
1107 * The space will be released later when all options
1108 * are confirmed to be correct
1110 sbi
->s_qf_names
[qtype
] = NULL
;
1112 case Opt_jqfmt_vfsold
:
1113 qfmt
= QFMT_VFS_OLD
;
1115 case Opt_jqfmt_vfsv0
:
1118 if (sb_any_quota_loaded(sb
) &&
1119 sbi
->s_jquota_fmt
!= qfmt
) {
1120 printk(KERN_ERR
"EXT3-fs: Cannot change "
1121 "journaled quota options when "
1122 "quota turned on.\n");
1125 sbi
->s_jquota_fmt
= qfmt
;
1129 set_opt(sbi
->s_mount_opt
, QUOTA
);
1130 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
1133 set_opt(sbi
->s_mount_opt
, QUOTA
);
1134 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1137 if (sb_any_quota_loaded(sb
)) {
1138 printk(KERN_ERR
"EXT3-fs: Cannot change quota "
1139 "options when quota turned on.\n");
1142 clear_opt(sbi
->s_mount_opt
, QUOTA
);
1143 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1144 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1151 "EXT3-fs: quota options not supported.\n");
1155 case Opt_offusrjquota
:
1156 case Opt_offgrpjquota
:
1157 case Opt_jqfmt_vfsold
:
1158 case Opt_jqfmt_vfsv0
:
1160 "EXT3-fs: journaled quota options not "
1167 set_opt(sbi
->s_mount_opt
, ABORT
);
1170 if (match_int(&args
[0], &option
))
1173 set_opt(sbi
->s_mount_opt
, BARRIER
);
1175 clear_opt(sbi
->s_mount_opt
, BARRIER
);
1181 printk("EXT3-fs: resize option only available "
1185 if (match_int(&args
[0], &option
) != 0)
1187 *n_blocks_count
= option
;
1190 set_opt(sbi
->s_mount_opt
, NOBH
);
1193 clear_opt(sbi
->s_mount_opt
, NOBH
);
1197 "EXT3-fs: Unrecognized mount option \"%s\" "
1198 "or missing value\n", p
);
1203 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1204 if ((sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
) &&
1205 sbi
->s_qf_names
[USRQUOTA
])
1206 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1208 if ((sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
) &&
1209 sbi
->s_qf_names
[GRPQUOTA
])
1210 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1212 if ((sbi
->s_qf_names
[USRQUOTA
] &&
1213 (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)) ||
1214 (sbi
->s_qf_names
[GRPQUOTA
] &&
1215 (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
))) {
1216 printk(KERN_ERR
"EXT3-fs: old and new quota "
1217 "format mixing.\n");
1221 if (!sbi
->s_jquota_fmt
) {
1222 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1223 "not specified.\n");
1227 if (sbi
->s_jquota_fmt
) {
1228 printk(KERN_ERR
"EXT3-fs: journaled quota format "
1229 "specified with no journaling "
1238 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1241 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1244 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1245 printk (KERN_ERR
"EXT3-fs warning: revision level too high, "
1246 "forcing read-only mode\n");
1251 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1252 printk (KERN_WARNING
"EXT3-fs warning: mounting unchecked fs, "
1253 "running e2fsck is recommended\n");
1254 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1255 printk (KERN_WARNING
1256 "EXT3-fs warning: mounting fs with errors, "
1257 "running e2fsck is recommended\n");
1258 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1259 le16_to_cpu(es
->s_mnt_count
) >=
1260 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1261 printk (KERN_WARNING
1262 "EXT3-fs warning: maximal mount count reached, "
1263 "running e2fsck is recommended\n");
1264 else if (le32_to_cpu(es
->s_checkinterval
) &&
1265 (le32_to_cpu(es
->s_lastcheck
) +
1266 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1267 printk (KERN_WARNING
1268 "EXT3-fs warning: checktime reached, "
1269 "running e2fsck is recommended\n");
1271 /* @@@ We _will_ want to clear the valid bit if we find
1272 inconsistencies, to force a fsck at reboot. But for
1273 a plain journaled filesystem we can keep it set as
1274 valid forever! :) */
1275 es
->s_state
&= cpu_to_le16(~EXT3_VALID_FS
);
1277 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1278 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1279 le16_add_cpu(&es
->s_mnt_count
, 1);
1280 es
->s_mtime
= cpu_to_le32(get_seconds());
1281 ext3_update_dynamic_rev(sb
);
1282 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1284 ext3_commit_super(sb
, es
, 1);
1285 if (test_opt(sb
, DEBUG
))
1286 printk(KERN_INFO
"[EXT3 FS bs=%lu, gc=%lu, "
1287 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1289 sbi
->s_groups_count
,
1290 EXT3_BLOCKS_PER_GROUP(sb
),
1291 EXT3_INODES_PER_GROUP(sb
),
1294 printk(KERN_INFO
"EXT3 FS on %s, ", sb
->s_id
);
1295 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1296 char b
[BDEVNAME_SIZE
];
1298 printk("external journal on %s\n",
1299 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1301 printk("internal journal\n");
1306 /* Called at mount-time, super-block is locked */
1307 static int ext3_check_descriptors(struct super_block
*sb
)
1309 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1312 ext3_debug ("Checking group descriptors");
1314 for (i
= 0; i
< sbi
->s_groups_count
; i
++) {
1315 struct ext3_group_desc
*gdp
= ext3_get_group_desc(sb
, i
, NULL
);
1316 ext3_fsblk_t first_block
= ext3_group_first_block_no(sb
, i
);
1317 ext3_fsblk_t last_block
;
1319 if (i
== sbi
->s_groups_count
- 1)
1320 last_block
= le32_to_cpu(sbi
->s_es
->s_blocks_count
) - 1;
1322 last_block
= first_block
+
1323 (EXT3_BLOCKS_PER_GROUP(sb
) - 1);
1325 if (le32_to_cpu(gdp
->bg_block_bitmap
) < first_block
||
1326 le32_to_cpu(gdp
->bg_block_bitmap
) > last_block
)
1328 ext3_error (sb
, "ext3_check_descriptors",
1329 "Block bitmap for group %d"
1330 " not in group (block %lu)!",
1332 le32_to_cpu(gdp
->bg_block_bitmap
));
1335 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < first_block
||
1336 le32_to_cpu(gdp
->bg_inode_bitmap
) > last_block
)
1338 ext3_error (sb
, "ext3_check_descriptors",
1339 "Inode bitmap for group %d"
1340 " not in group (block %lu)!",
1342 le32_to_cpu(gdp
->bg_inode_bitmap
));
1345 if (le32_to_cpu(gdp
->bg_inode_table
) < first_block
||
1346 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
- 1 >
1349 ext3_error (sb
, "ext3_check_descriptors",
1350 "Inode table for group %d"
1351 " not in group (block %lu)!",
1353 le32_to_cpu(gdp
->bg_inode_table
));
1358 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1359 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1364 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1365 * the superblock) which were deleted from all directories, but held open by
1366 * a process at the time of a crash. We walk the list and try to delete these
1367 * inodes at recovery time (only with a read-write filesystem).
1369 * In order to keep the orphan inode chain consistent during traversal (in
1370 * case of crash during recovery), we link each inode into the superblock
1371 * orphan list_head and handle it the same way as an inode deletion during
1372 * normal operation (which journals the operations for us).
1374 * We only do an iget() and an iput() on each inode, which is very safe if we
1375 * accidentally point at an in-use or already deleted inode. The worst that
1376 * can happen in this case is that we get a "bit already cleared" message from
1377 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1378 * e2fsck was run on this filesystem, and it must have already done the orphan
1379 * inode cleanup for us, so we can safely abort without any further action.
1381 static void ext3_orphan_cleanup (struct super_block
* sb
,
1382 struct ext3_super_block
* es
)
1384 unsigned int s_flags
= sb
->s_flags
;
1385 int nr_orphans
= 0, nr_truncates
= 0;
1389 if (!es
->s_last_orphan
) {
1390 jbd_debug(4, "no orphan inodes to clean up\n");
1394 if (bdev_read_only(sb
->s_bdev
)) {
1395 printk(KERN_ERR
"EXT3-fs: write access "
1396 "unavailable, skipping orphan cleanup.\n");
1400 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1401 if (es
->s_last_orphan
)
1402 jbd_debug(1, "Errors on filesystem, "
1403 "clearing orphan list.\n");
1404 es
->s_last_orphan
= 0;
1405 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1409 if (s_flags
& MS_RDONLY
) {
1410 printk(KERN_INFO
"EXT3-fs: %s: orphan cleanup on readonly fs\n",
1412 sb
->s_flags
&= ~MS_RDONLY
;
1415 /* Needed for iput() to work correctly and not trash data */
1416 sb
->s_flags
|= MS_ACTIVE
;
1417 /* Turn on quotas so that they are updated correctly */
1418 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1419 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1420 int ret
= ext3_quota_on_mount(sb
, i
);
1423 "EXT3-fs: Cannot turn on journaled "
1424 "quota: error %d\n", ret
);
1429 while (es
->s_last_orphan
) {
1430 struct inode
*inode
;
1432 inode
= ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
));
1433 if (IS_ERR(inode
)) {
1434 es
->s_last_orphan
= 0;
1438 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1440 if (inode
->i_nlink
) {
1442 "%s: truncating inode %lu to %Ld bytes\n",
1443 __func__
, inode
->i_ino
, inode
->i_size
);
1444 jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
1445 inode
->i_ino
, inode
->i_size
);
1446 ext3_truncate(inode
);
1450 "%s: deleting unreferenced inode %lu\n",
1451 __func__
, inode
->i_ino
);
1452 jbd_debug(2, "deleting unreferenced inode %lu\n",
1456 iput(inode
); /* The delete magic happens here! */
1459 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1462 printk(KERN_INFO
"EXT3-fs: %s: %d orphan inode%s deleted\n",
1463 sb
->s_id
, PLURAL(nr_orphans
));
1465 printk(KERN_INFO
"EXT3-fs: %s: %d truncate%s cleaned up\n",
1466 sb
->s_id
, PLURAL(nr_truncates
));
1468 /* Turn quotas off */
1469 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1470 if (sb_dqopt(sb
)->files
[i
])
1471 vfs_quota_off(sb
, i
, 0);
1474 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1478 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1479 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1480 * We need to be 1 filesystem block less than the 2^32 sector limit.
1482 static loff_t
ext3_max_size(int bits
)
1484 loff_t res
= EXT3_NDIR_BLOCKS
;
1488 /* This is calculated to be the largest file size for a
1489 * dense, file such that the total number of
1490 * sectors in the file, including data and all indirect blocks,
1491 * does not exceed 2^32 -1
1492 * __u32 i_blocks representing the total number of
1493 * 512 bytes blocks of the file
1495 upper_limit
= (1LL << 32) - 1;
1497 /* total blocks in file system block size */
1498 upper_limit
>>= (bits
- 9);
1501 /* indirect blocks */
1503 /* double indirect blocks */
1504 meta_blocks
+= 1 + (1LL << (bits
-2));
1505 /* tripple indirect blocks */
1506 meta_blocks
+= 1 + (1LL << (bits
-2)) + (1LL << (2*(bits
-2)));
1508 upper_limit
-= meta_blocks
;
1509 upper_limit
<<= bits
;
1511 res
+= 1LL << (bits
-2);
1512 res
+= 1LL << (2*(bits
-2));
1513 res
+= 1LL << (3*(bits
-2));
1515 if (res
> upper_limit
)
1518 if (res
> MAX_LFS_FILESIZE
)
1519 res
= MAX_LFS_FILESIZE
;
1524 static ext3_fsblk_t
descriptor_loc(struct super_block
*sb
,
1525 ext3_fsblk_t logic_sb_block
,
1528 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1529 unsigned long bg
, first_meta_bg
;
1532 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1534 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1536 return (logic_sb_block
+ nr
+ 1);
1537 bg
= sbi
->s_desc_per_block
* nr
;
1538 if (ext3_bg_has_super(sb
, bg
))
1540 return (has_super
+ ext3_group_first_block_no(sb
, bg
));
1544 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1546 struct buffer_head
* bh
;
1547 struct ext3_super_block
*es
= NULL
;
1548 struct ext3_sb_info
*sbi
;
1550 ext3_fsblk_t sb_block
= get_sb_block(&data
);
1551 ext3_fsblk_t logic_sb_block
;
1552 unsigned long offset
= 0;
1553 unsigned int journal_inum
= 0;
1554 unsigned long journal_devnum
= 0;
1555 unsigned long def_mount_opts
;
1566 sbi
= kzalloc(sizeof(*sbi
), GFP_KERNEL
);
1570 sbi
->s_blockgroup_lock
=
1571 kzalloc(sizeof(struct blockgroup_lock
), GFP_KERNEL
);
1572 if (!sbi
->s_blockgroup_lock
) {
1576 sb
->s_fs_info
= sbi
;
1577 sbi
->s_mount_opt
= 0;
1578 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1579 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1580 sbi
->s_sb_block
= sb_block
;
1584 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1586 printk(KERN_ERR
"EXT3-fs: unable to set blocksize\n");
1591 * The ext3 superblock will not be buffer aligned for other than 1kB
1592 * block sizes. We need to calculate the offset from buffer start.
1594 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1595 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1596 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1598 logic_sb_block
= sb_block
;
1601 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1602 printk (KERN_ERR
"EXT3-fs: unable to read superblock\n");
1606 * Note: s_es must be initialized as soon as possible because
1607 * some ext3 macro-instructions depend on its value
1609 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1611 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1612 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1615 /* Set defaults before we parse the mount options */
1616 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1617 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1618 set_opt(sbi
->s_mount_opt
, DEBUG
);
1619 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1620 set_opt(sbi
->s_mount_opt
, GRPID
);
1621 if (def_mount_opts
& EXT3_DEFM_UID16
)
1622 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1623 #ifdef CONFIG_EXT3_FS_XATTR
1624 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1625 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1627 #ifdef CONFIG_EXT3_FS_POSIX_ACL
1628 if (def_mount_opts
& EXT3_DEFM_ACL
)
1629 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1631 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1632 sbi
->s_mount_opt
|= EXT3_MOUNT_JOURNAL_DATA
;
1633 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1634 sbi
->s_mount_opt
|= EXT3_MOUNT_ORDERED_DATA
;
1635 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1636 sbi
->s_mount_opt
|= EXT3_MOUNT_WRITEBACK_DATA
;
1638 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1639 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1640 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_CONTINUE
)
1641 set_opt(sbi
->s_mount_opt
, ERRORS_CONT
);
1643 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1645 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1646 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1648 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1650 if (!parse_options ((char *) data
, sb
, &journal_inum
, &journal_devnum
,
1654 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1655 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
1657 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1658 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1659 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1660 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1662 "EXT3-fs warning: feature flags set on rev 0 fs, "
1663 "running e2fsck is recommended\n");
1665 * Check feature flags regardless of the revision level, since we
1666 * previously didn't change the revision level when setting the flags,
1667 * so there is a chance incompat flags are set on a rev 0 filesystem.
1669 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1671 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount because of "
1672 "unsupported optional features (%x).\n",
1673 sb
->s_id
, le32_to_cpu(features
));
1676 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1677 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1678 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount RDWR because of "
1679 "unsupported optional features (%x).\n",
1680 sb
->s_id
, le32_to_cpu(features
));
1683 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1685 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1686 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1688 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1689 blocksize
, sb
->s_id
);
1693 hblock
= bdev_hardsect_size(sb
->s_bdev
);
1694 if (sb
->s_blocksize
!= blocksize
) {
1696 * Make sure the blocksize for the filesystem is larger
1697 * than the hardware sectorsize for the machine.
1699 if (blocksize
< hblock
) {
1700 printk(KERN_ERR
"EXT3-fs: blocksize %d too small for "
1701 "device blocksize %d.\n", blocksize
, hblock
);
1706 if (!sb_set_blocksize(sb
, blocksize
)) {
1707 printk(KERN_ERR
"EXT3-fs: bad blocksize %d.\n",
1711 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1712 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1713 bh
= sb_bread(sb
, logic_sb_block
);
1716 "EXT3-fs: Can't read superblock on 2nd try.\n");
1719 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1721 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1723 "EXT3-fs: Magic mismatch, very weird !\n");
1728 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1730 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1731 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1732 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1734 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1735 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1736 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1737 (!is_power_of_2(sbi
->s_inode_size
)) ||
1738 (sbi
->s_inode_size
> blocksize
)) {
1740 "EXT3-fs: unsupported inode size: %d\n",
1745 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1746 le32_to_cpu(es
->s_log_frag_size
);
1747 if (blocksize
!= sbi
->s_frag_size
) {
1749 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1750 sbi
->s_frag_size
, blocksize
);
1753 sbi
->s_frags_per_block
= 1;
1754 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1755 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1756 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1757 if (EXT3_INODE_SIZE(sb
) == 0 || EXT3_INODES_PER_GROUP(sb
) == 0)
1759 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1760 if (sbi
->s_inodes_per_block
== 0)
1762 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1763 sbi
->s_inodes_per_block
;
1764 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1766 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1767 sbi
->s_addr_per_block_bits
= ilog2(EXT3_ADDR_PER_BLOCK(sb
));
1768 sbi
->s_desc_per_block_bits
= ilog2(EXT3_DESC_PER_BLOCK(sb
));
1769 for (i
=0; i
< 4; i
++)
1770 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1771 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1772 i
= le32_to_cpu(es
->s_flags
);
1773 if (i
& EXT2_FLAGS_UNSIGNED_HASH
)
1774 sbi
->s_hash_unsigned
= 3;
1775 else if ((i
& EXT2_FLAGS_SIGNED_HASH
) == 0) {
1776 #ifdef __CHAR_UNSIGNED__
1777 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH
);
1778 sbi
->s_hash_unsigned
= 3;
1780 es
->s_flags
|= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH
);
1785 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1787 "EXT3-fs: #blocks per group too big: %lu\n",
1788 sbi
->s_blocks_per_group
);
1791 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1793 "EXT3-fs: #fragments per group too big: %lu\n",
1794 sbi
->s_frags_per_group
);
1797 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1799 "EXT3-fs: #inodes per group too big: %lu\n",
1800 sbi
->s_inodes_per_group
);
1804 if (le32_to_cpu(es
->s_blocks_count
) >
1805 (sector_t
)(~0ULL) >> (sb
->s_blocksize_bits
- 9)) {
1806 printk(KERN_ERR
"EXT3-fs: filesystem on %s:"
1807 " too large to mount safely\n", sb
->s_id
);
1808 if (sizeof(sector_t
) < 8)
1809 printk(KERN_WARNING
"EXT3-fs: CONFIG_LBD not "
1814 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1816 sbi
->s_groups_count
= ((le32_to_cpu(es
->s_blocks_count
) -
1817 le32_to_cpu(es
->s_first_data_block
) - 1)
1818 / EXT3_BLOCKS_PER_GROUP(sb
)) + 1;
1819 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1820 EXT3_DESC_PER_BLOCK(sb
);
1821 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1823 if (sbi
->s_group_desc
== NULL
) {
1824 printk (KERN_ERR
"EXT3-fs: not enough memory\n");
1828 bgl_lock_init(sbi
->s_blockgroup_lock
);
1830 for (i
= 0; i
< db_count
; i
++) {
1831 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1832 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1833 if (!sbi
->s_group_desc
[i
]) {
1834 printk (KERN_ERR
"EXT3-fs: "
1835 "can't read group descriptor %d\n", i
);
1840 if (!ext3_check_descriptors (sb
)) {
1841 printk(KERN_ERR
"EXT3-fs: group descriptors corrupted!\n");
1844 sbi
->s_gdb_count
= db_count
;
1845 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1846 spin_lock_init(&sbi
->s_next_gen_lock
);
1848 err
= percpu_counter_init(&sbi
->s_freeblocks_counter
,
1849 ext3_count_free_blocks(sb
));
1851 err
= percpu_counter_init(&sbi
->s_freeinodes_counter
,
1852 ext3_count_free_inodes(sb
));
1855 err
= percpu_counter_init(&sbi
->s_dirs_counter
,
1856 ext3_count_dirs(sb
));
1859 printk(KERN_ERR
"EXT3-fs: insufficient memory\n");
1863 /* per fileystem reservation list head & lock */
1864 spin_lock_init(&sbi
->s_rsv_window_lock
);
1865 sbi
->s_rsv_window_root
= RB_ROOT
;
1866 /* Add a single, static dummy reservation to the start of the
1867 * reservation window list --- it gives us a placeholder for
1868 * append-at-start-of-list which makes the allocation logic
1869 * _much_ simpler. */
1870 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1871 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1872 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1873 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1874 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1877 * set up enough so that it can read an inode
1879 sb
->s_op
= &ext3_sops
;
1880 sb
->s_export_op
= &ext3_export_ops
;
1881 sb
->s_xattr
= ext3_xattr_handlers
;
1883 sb
->s_qcop
= &ext3_qctl_operations
;
1884 sb
->dq_op
= &ext3_quota_operations
;
1886 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1890 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1891 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1892 EXT3_FEATURE_INCOMPAT_RECOVER
));
1895 * The first inode we look at is the journal inode. Don't try
1896 * root first: it may be modified in the journal!
1898 if (!test_opt(sb
, NOLOAD
) &&
1899 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1900 if (ext3_load_journal(sb
, es
, journal_devnum
))
1902 } else if (journal_inum
) {
1903 if (ext3_create_journal(sb
, es
, journal_inum
))
1908 "ext3: No journal on filesystem on %s\n",
1913 /* We have now updated the journal if required, so we can
1914 * validate the data journaling mode. */
1915 switch (test_opt(sb
, DATA_FLAGS
)) {
1917 /* No mode set, assume a default based on the journal
1918 capabilities: ORDERED_DATA if the journal can
1919 cope, else JOURNAL_DATA */
1920 if (journal_check_available_features
1921 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1922 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1924 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1927 case EXT3_MOUNT_ORDERED_DATA
:
1928 case EXT3_MOUNT_WRITEBACK_DATA
:
1929 if (!journal_check_available_features
1930 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1931 printk(KERN_ERR
"EXT3-fs: Journal does not support "
1932 "requested data journaling mode\n");
1939 if (test_opt(sb
, NOBH
)) {
1940 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1941 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option - "
1942 "its supported only with writeback mode\n");
1943 clear_opt(sbi
->s_mount_opt
, NOBH
);
1947 * The journal_load will have done any necessary log recovery,
1948 * so we can safely mount the rest of the filesystem now.
1951 root
= ext3_iget(sb
, EXT3_ROOT_INO
);
1953 printk(KERN_ERR
"EXT3-fs: get root inode failed\n");
1954 ret
= PTR_ERR(root
);
1957 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1959 printk(KERN_ERR
"EXT3-fs: corrupt root inode, run e2fsck\n");
1962 sb
->s_root
= d_alloc_root(root
);
1964 printk(KERN_ERR
"EXT3-fs: get root dentry failed\n");
1970 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
1972 * akpm: core read_super() calls in here with the superblock locked.
1973 * That deadlocks, because orphan cleanup needs to lock the superblock
1974 * in numerous places. Here we just pop the lock - it's relatively
1975 * harmless, because we are now ready to accept write_super() requests,
1976 * and aviro says that's the only reason for hanging onto the
1979 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
1980 ext3_orphan_cleanup(sb
, es
);
1981 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
1983 printk (KERN_INFO
"EXT3-fs: recovery complete.\n");
1984 ext3_mark_recovery_complete(sb
, es
);
1985 printk (KERN_INFO
"EXT3-fs: mounted filesystem with %s data mode.\n",
1986 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
1987 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
1995 printk(KERN_ERR
"VFS: Can't find ext3 filesystem on dev %s.\n",
2000 journal_destroy(sbi
->s_journal
);
2002 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
2003 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
2004 percpu_counter_destroy(&sbi
->s_dirs_counter
);
2006 for (i
= 0; i
< db_count
; i
++)
2007 brelse(sbi
->s_group_desc
[i
]);
2008 kfree(sbi
->s_group_desc
);
2011 for (i
= 0; i
< MAXQUOTAS
; i
++)
2012 kfree(sbi
->s_qf_names
[i
]);
2014 ext3_blkdev_remove(sbi
);
2017 sb
->s_fs_info
= NULL
;
2024 * Setup any per-fs journal parameters now. We'll do this both on
2025 * initial mount, once the journal has been initialised but before we've
2026 * done any recovery; and again on any subsequent remount.
2028 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
2030 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2032 if (sbi
->s_commit_interval
)
2033 journal
->j_commit_interval
= sbi
->s_commit_interval
;
2034 /* We could also set up an ext3-specific default for the commit
2035 * interval here, but for now we'll just fall back to the jbd
2038 spin_lock(&journal
->j_state_lock
);
2039 if (test_opt(sb
, BARRIER
))
2040 journal
->j_flags
|= JFS_BARRIER
;
2042 journal
->j_flags
&= ~JFS_BARRIER
;
2043 if (test_opt(sb
, DATA_ERR_ABORT
))
2044 journal
->j_flags
|= JFS_ABORT_ON_SYNCDATA_ERR
;
2046 journal
->j_flags
&= ~JFS_ABORT_ON_SYNCDATA_ERR
;
2047 spin_unlock(&journal
->j_state_lock
);
2050 static journal_t
*ext3_get_journal(struct super_block
*sb
,
2051 unsigned int journal_inum
)
2053 struct inode
*journal_inode
;
2056 /* First, test for the existence of a valid inode on disk. Bad
2057 * things happen if we iget() an unused inode, as the subsequent
2058 * iput() will try to delete it. */
2060 journal_inode
= ext3_iget(sb
, journal_inum
);
2061 if (IS_ERR(journal_inode
)) {
2062 printk(KERN_ERR
"EXT3-fs: no journal found.\n");
2065 if (!journal_inode
->i_nlink
) {
2066 make_bad_inode(journal_inode
);
2067 iput(journal_inode
);
2068 printk(KERN_ERR
"EXT3-fs: journal inode is deleted.\n");
2072 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
2073 journal_inode
, journal_inode
->i_size
);
2074 if (!S_ISREG(journal_inode
->i_mode
)) {
2075 printk(KERN_ERR
"EXT3-fs: invalid journal inode.\n");
2076 iput(journal_inode
);
2080 journal
= journal_init_inode(journal_inode
);
2082 printk(KERN_ERR
"EXT3-fs: Could not load journal inode\n");
2083 iput(journal_inode
);
2086 journal
->j_private
= sb
;
2087 ext3_init_journal_params(sb
, journal
);
2091 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
2094 struct buffer_head
* bh
;
2098 int hblock
, blocksize
;
2099 ext3_fsblk_t sb_block
;
2100 unsigned long offset
;
2101 struct ext3_super_block
* es
;
2102 struct block_device
*bdev
;
2104 bdev
= ext3_blkdev_get(j_dev
);
2108 if (bd_claim(bdev
, sb
)) {
2110 "EXT3: failed to claim external journal device.\n");
2111 blkdev_put(bdev
, FMODE_READ
|FMODE_WRITE
);
2115 blocksize
= sb
->s_blocksize
;
2116 hblock
= bdev_hardsect_size(bdev
);
2117 if (blocksize
< hblock
) {
2119 "EXT3-fs: blocksize too small for journal device.\n");
2123 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
2124 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
2125 set_blocksize(bdev
, blocksize
);
2126 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
2127 printk(KERN_ERR
"EXT3-fs: couldn't read superblock of "
2128 "external journal\n");
2132 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
2133 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
2134 !(le32_to_cpu(es
->s_feature_incompat
) &
2135 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
2136 printk(KERN_ERR
"EXT3-fs: external journal has "
2137 "bad superblock\n");
2142 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
2143 printk(KERN_ERR
"EXT3-fs: journal UUID does not match\n");
2148 len
= le32_to_cpu(es
->s_blocks_count
);
2149 start
= sb_block
+ 1;
2150 brelse(bh
); /* we're done with the superblock */
2152 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
2153 start
, len
, blocksize
);
2155 printk(KERN_ERR
"EXT3-fs: failed to create device journal\n");
2158 journal
->j_private
= sb
;
2159 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
2160 wait_on_buffer(journal
->j_sb_buffer
);
2161 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
2162 printk(KERN_ERR
"EXT3-fs: I/O error on journal device\n");
2165 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
2166 printk(KERN_ERR
"EXT3-fs: External journal has more than one "
2167 "user (unsupported) - %d\n",
2168 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
2171 EXT3_SB(sb
)->journal_bdev
= bdev
;
2172 ext3_init_journal_params(sb
, journal
);
2175 journal_destroy(journal
);
2177 ext3_blkdev_put(bdev
);
2181 static int ext3_load_journal(struct super_block
*sb
,
2182 struct ext3_super_block
*es
,
2183 unsigned long journal_devnum
)
2186 unsigned int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
2189 int really_read_only
;
2191 if (journal_devnum
&&
2192 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2193 printk(KERN_INFO
"EXT3-fs: external journal device major/minor "
2194 "numbers have changed\n");
2195 journal_dev
= new_decode_dev(journal_devnum
);
2197 journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
2199 really_read_only
= bdev_read_only(sb
->s_bdev
);
2202 * Are we loading a blank journal or performing recovery after a
2203 * crash? For recovery, we need to check in advance whether we
2204 * can get read-write access to the device.
2207 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
2208 if (sb
->s_flags
& MS_RDONLY
) {
2209 printk(KERN_INFO
"EXT3-fs: INFO: recovery "
2210 "required on readonly filesystem.\n");
2211 if (really_read_only
) {
2212 printk(KERN_ERR
"EXT3-fs: write access "
2213 "unavailable, cannot proceed.\n");
2216 printk (KERN_INFO
"EXT3-fs: write access will "
2217 "be enabled during recovery.\n");
2221 if (journal_inum
&& journal_dev
) {
2222 printk(KERN_ERR
"EXT3-fs: filesystem has both journal "
2223 "and inode journals!\n");
2228 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
2231 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
2235 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
2236 err
= journal_update_format(journal
);
2238 printk(KERN_ERR
"EXT3-fs: error updating journal.\n");
2239 journal_destroy(journal
);
2244 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
2245 err
= journal_wipe(journal
, !really_read_only
);
2247 err
= journal_load(journal
);
2250 printk(KERN_ERR
"EXT3-fs: error loading journal.\n");
2251 journal_destroy(journal
);
2255 EXT3_SB(sb
)->s_journal
= journal
;
2256 ext3_clear_journal_err(sb
, es
);
2258 if (journal_devnum
&&
2259 journal_devnum
!= le32_to_cpu(es
->s_journal_dev
)) {
2260 es
->s_journal_dev
= cpu_to_le32(journal_devnum
);
2263 /* Make sure we flush the recovery flag to disk. */
2264 ext3_commit_super(sb
, es
, 1);
2270 static int ext3_create_journal(struct super_block
* sb
,
2271 struct ext3_super_block
* es
,
2272 unsigned int journal_inum
)
2277 if (sb
->s_flags
& MS_RDONLY
) {
2278 printk(KERN_ERR
"EXT3-fs: readonly filesystem when trying to "
2279 "create journal.\n");
2283 journal
= ext3_get_journal(sb
, journal_inum
);
2287 printk(KERN_INFO
"EXT3-fs: creating new journal on inode %u\n",
2290 err
= journal_create(journal
);
2292 printk(KERN_ERR
"EXT3-fs: error creating journal.\n");
2293 journal_destroy(journal
);
2297 EXT3_SB(sb
)->s_journal
= journal
;
2299 ext3_update_dynamic_rev(sb
);
2300 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2301 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2303 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2306 /* Make sure we flush the recovery flag to disk. */
2307 ext3_commit_super(sb
, es
, 1);
2312 static int ext3_commit_super(struct super_block
*sb
,
2313 struct ext3_super_block
*es
,
2316 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2321 es
->s_wtime
= cpu_to_le32(get_seconds());
2322 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2323 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2324 BUFFER_TRACE(sbh
, "marking dirty");
2325 mark_buffer_dirty(sbh
);
2327 error
= sync_dirty_buffer(sbh
);
2333 * Have we just finished recovery? If so, and if we are mounting (or
2334 * remounting) the filesystem readonly, then we will end up with a
2335 * consistent fs on disk. Record that fact.
2337 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2338 struct ext3_super_block
* es
)
2340 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2342 journal_lock_updates(journal
);
2343 if (journal_flush(journal
) < 0)
2347 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2348 sb
->s_flags
& MS_RDONLY
) {
2349 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2351 ext3_commit_super(sb
, es
, 1);
2356 journal_unlock_updates(journal
);
2360 * If we are mounting (or read-write remounting) a filesystem whose journal
2361 * has recorded an error from a previous lifetime, move that error to the
2362 * main filesystem now.
2364 static void ext3_clear_journal_err(struct super_block
* sb
,
2365 struct ext3_super_block
* es
)
2371 journal
= EXT3_SB(sb
)->s_journal
;
2374 * Now check for any error status which may have been recorded in the
2375 * journal by a prior ext3_error() or ext3_abort()
2378 j_errno
= journal_errno(journal
);
2382 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2383 ext3_warning(sb
, __func__
, "Filesystem error recorded "
2384 "from previous mount: %s", errstr
);
2385 ext3_warning(sb
, __func__
, "Marking fs in need of "
2386 "filesystem check.");
2388 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2389 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2390 ext3_commit_super (sb
, es
, 1);
2392 journal_clear_err(journal
);
2397 * Force the running and committing transactions to commit,
2398 * and wait on the commit.
2400 int ext3_force_commit(struct super_block
*sb
)
2405 if (sb
->s_flags
& MS_RDONLY
)
2408 journal
= EXT3_SB(sb
)->s_journal
;
2410 ret
= ext3_journal_force_commit(journal
);
2415 * Ext3 always journals updates to the superblock itself, so we don't
2416 * have to propagate any other updates to the superblock on disk at this
2417 * point. (We can probably nuke this function altogether, and remove
2418 * any mention to sb->s_dirt in all of fs/ext3; eventual cleanup...)
2420 static void ext3_write_super (struct super_block
* sb
)
2422 if (mutex_trylock(&sb
->s_lock
) != 0)
2427 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2432 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2434 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2440 * LVM calls this function before a (read-only) snapshot is created. This
2441 * gives us a chance to flush the journal completely and mark the fs clean.
2443 static int ext3_freeze(struct super_block
*sb
)
2449 if (!(sb
->s_flags
& MS_RDONLY
)) {
2450 journal
= EXT3_SB(sb
)->s_journal
;
2452 /* Now we set up the journal barrier. */
2453 journal_lock_updates(journal
);
2456 * We don't want to clear needs_recovery flag when we failed
2457 * to flush the journal.
2459 error
= journal_flush(journal
);
2463 /* Journal blocked and flushed, clear needs_recovery flag. */
2464 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2465 error
= ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2472 journal_unlock_updates(journal
);
2477 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2478 * flag here, even though the filesystem is not technically dirty yet.
2480 static int ext3_unfreeze(struct super_block
*sb
)
2482 if (!(sb
->s_flags
& MS_RDONLY
)) {
2484 /* Reser the needs_recovery flag before the fs is unlocked. */
2485 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2486 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2488 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2493 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2495 struct ext3_super_block
* es
;
2496 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2497 ext3_fsblk_t n_blocks_count
= 0;
2498 unsigned long old_sb_flags
;
2499 struct ext3_mount_options old_opts
;
2505 /* Store the original options */
2506 old_sb_flags
= sb
->s_flags
;
2507 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2508 old_opts
.s_resuid
= sbi
->s_resuid
;
2509 old_opts
.s_resgid
= sbi
->s_resgid
;
2510 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2512 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2513 for (i
= 0; i
< MAXQUOTAS
; i
++)
2514 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2518 * Allow the "check" option to be passed as a remount option.
2520 if (!parse_options(data
, sb
, NULL
, NULL
, &n_blocks_count
, 1)) {
2525 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
)
2526 ext3_abort(sb
, __func__
, "Abort forced by user");
2528 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2529 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
2533 ext3_init_journal_params(sb
, sbi
->s_journal
);
2535 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2536 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2537 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
) {
2542 if (*flags
& MS_RDONLY
) {
2544 * First of all, the unconditional stuff we have to do
2545 * to disable replay of the journal when we next remount
2547 sb
->s_flags
|= MS_RDONLY
;
2550 * OK, test if we are remounting a valid rw partition
2551 * readonly, and if so set the rdonly flag and then
2552 * mark the partition as valid again.
2554 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2555 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2556 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2559 * We have to unlock super so that we can wait for
2563 ext3_mark_recovery_complete(sb
, es
);
2567 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2568 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2569 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2570 "remount RDWR because of unsupported "
2571 "optional features (%x).\n",
2572 sb
->s_id
, le32_to_cpu(ret
));
2578 * If we have an unprocessed orphan list hanging
2579 * around from a previously readonly bdev mount,
2580 * require a full umount/remount for now.
2582 if (es
->s_last_orphan
) {
2583 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2584 "remount RDWR because of unprocessed "
2585 "orphan inode list. Please "
2586 "umount/remount instead.\n",
2593 * Mounting a RDONLY partition read-write, so reread
2594 * and store the current valid flag. (It may have
2595 * been changed by e2fsck since we originally mounted
2598 ext3_clear_journal_err(sb
, es
);
2599 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2600 if ((err
= ext3_group_extend(sb
, es
, n_blocks_count
)))
2602 if (!ext3_setup_super (sb
, es
, 0))
2603 sb
->s_flags
&= ~MS_RDONLY
;
2607 /* Release old quota file names */
2608 for (i
= 0; i
< MAXQUOTAS
; i
++)
2609 if (old_opts
.s_qf_names
[i
] &&
2610 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2611 kfree(old_opts
.s_qf_names
[i
]);
2615 sb
->s_flags
= old_sb_flags
;
2616 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2617 sbi
->s_resuid
= old_opts
.s_resuid
;
2618 sbi
->s_resgid
= old_opts
.s_resgid
;
2619 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2621 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2622 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2623 if (sbi
->s_qf_names
[i
] &&
2624 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2625 kfree(sbi
->s_qf_names
[i
]);
2626 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2632 static int ext3_statfs (struct dentry
* dentry
, struct kstatfs
* buf
)
2634 struct super_block
*sb
= dentry
->d_sb
;
2635 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2636 struct ext3_super_block
*es
= sbi
->s_es
;
2639 if (test_opt(sb
, MINIX_DF
)) {
2640 sbi
->s_overhead_last
= 0;
2641 } else if (sbi
->s_blocks_last
!= le32_to_cpu(es
->s_blocks_count
)) {
2642 unsigned long ngroups
= sbi
->s_groups_count
, i
;
2643 ext3_fsblk_t overhead
= 0;
2647 * Compute the overhead (FS structures). This is constant
2648 * for a given filesystem unless the number of block groups
2649 * changes so we cache the previous value until it does.
2653 * All of the blocks before first_data_block are
2656 overhead
= le32_to_cpu(es
->s_first_data_block
);
2659 * Add the overhead attributed to the superblock and
2660 * block group descriptors. If the sparse superblocks
2661 * feature is turned on, then not all groups have this.
2663 for (i
= 0; i
< ngroups
; i
++) {
2664 overhead
+= ext3_bg_has_super(sb
, i
) +
2665 ext3_bg_num_gdb(sb
, i
);
2670 * Every block group has an inode bitmap, a block
2671 * bitmap, and an inode table.
2673 overhead
+= ngroups
* (2 + sbi
->s_itb_per_group
);
2674 sbi
->s_overhead_last
= overhead
;
2676 sbi
->s_blocks_last
= le32_to_cpu(es
->s_blocks_count
);
2679 buf
->f_type
= EXT3_SUPER_MAGIC
;
2680 buf
->f_bsize
= sb
->s_blocksize
;
2681 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - sbi
->s_overhead_last
;
2682 buf
->f_bfree
= percpu_counter_sum_positive(&sbi
->s_freeblocks_counter
);
2683 es
->s_free_blocks_count
= cpu_to_le32(buf
->f_bfree
);
2684 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2685 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2687 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2688 buf
->f_ffree
= percpu_counter_sum_positive(&sbi
->s_freeinodes_counter
);
2689 es
->s_free_inodes_count
= cpu_to_le32(buf
->f_ffree
);
2690 buf
->f_namelen
= EXT3_NAME_LEN
;
2691 fsid
= le64_to_cpup((void *)es
->s_uuid
) ^
2692 le64_to_cpup((void *)es
->s_uuid
+ sizeof(u64
));
2693 buf
->f_fsid
.val
[0] = fsid
& 0xFFFFFFFFUL
;
2694 buf
->f_fsid
.val
[1] = (fsid
>> 32) & 0xFFFFFFFFUL
;
2698 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2699 * is locked for write. Otherwise the are possible deadlocks:
2700 * Process 1 Process 2
2701 * ext3_create() quota_sync()
2702 * journal_start() write_dquot()
2703 * vfs_dq_init() down(dqio_mutex)
2704 * down(dqio_mutex) journal_start()
2710 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2712 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2715 static int ext3_write_dquot(struct dquot
*dquot
)
2719 struct inode
*inode
;
2721 inode
= dquot_to_inode(dquot
);
2722 handle
= ext3_journal_start(inode
,
2723 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2725 return PTR_ERR(handle
);
2726 ret
= dquot_commit(dquot
);
2727 err
= ext3_journal_stop(handle
);
2733 static int ext3_acquire_dquot(struct dquot
*dquot
)
2738 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2739 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2741 return PTR_ERR(handle
);
2742 ret
= dquot_acquire(dquot
);
2743 err
= ext3_journal_stop(handle
);
2749 static int ext3_release_dquot(struct dquot
*dquot
)
2754 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2755 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2756 if (IS_ERR(handle
)) {
2757 /* Release dquot anyway to avoid endless cycle in dqput() */
2758 dquot_release(dquot
);
2759 return PTR_ERR(handle
);
2761 ret
= dquot_release(dquot
);
2762 err
= ext3_journal_stop(handle
);
2768 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2770 /* Are we journaling quotas? */
2771 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2772 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2773 dquot_mark_dquot_dirty(dquot
);
2774 return ext3_write_dquot(dquot
);
2776 return dquot_mark_dquot_dirty(dquot
);
2780 static int ext3_write_info(struct super_block
*sb
, int type
)
2785 /* Data block + inode block */
2786 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2788 return PTR_ERR(handle
);
2789 ret
= dquot_commit_info(sb
, type
);
2790 err
= ext3_journal_stop(handle
);
2797 * Turn on quotas during mount time - we need to find
2798 * the quota file and such...
2800 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2802 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2803 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2807 * Standard function to be called on quota_on
2809 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2810 char *name
, int remount
)
2815 if (!test_opt(sb
, QUOTA
))
2817 /* When remounting, no checks are needed and in fact, name is NULL */
2819 return vfs_quota_on(sb
, type
, format_id
, name
, remount
);
2821 err
= kern_path(name
, LOOKUP_FOLLOW
, &path
);
2825 /* Quotafile not on the same filesystem? */
2826 if (path
.mnt
->mnt_sb
!= sb
) {
2830 /* Journaling quota? */
2831 if (EXT3_SB(sb
)->s_qf_names
[type
]) {
2832 /* Quotafile not of fs root? */
2833 if (path
.dentry
->d_parent
!= sb
->s_root
)
2835 "EXT3-fs: Quota file not on filesystem root. "
2836 "Journaled quota will not work.\n");
2840 * When we journal data on quota file, we have to flush journal to see
2841 * all updates to the file when we bypass pagecache...
2843 if (ext3_should_journal_data(path
.dentry
->d_inode
)) {
2845 * We don't need to lock updates but journal_flush() could
2846 * otherwise be livelocked...
2848 journal_lock_updates(EXT3_SB(sb
)->s_journal
);
2849 err
= journal_flush(EXT3_SB(sb
)->s_journal
);
2850 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2857 err
= vfs_quota_on_path(sb
, type
, format_id
, &path
);
2862 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2863 * acquiring the locks... As quota files are never truncated and quota code
2864 * itself serializes the operations (and noone else should touch the files)
2865 * we don't have to be afraid of races */
2866 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2867 size_t len
, loff_t off
)
2869 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2870 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2872 int offset
= off
& (sb
->s_blocksize
- 1);
2875 struct buffer_head
*bh
;
2876 loff_t i_size
= i_size_read(inode
);
2880 if (off
+len
> i_size
)
2883 while (toread
> 0) {
2884 tocopy
= sb
->s_blocksize
- offset
< toread
?
2885 sb
->s_blocksize
- offset
: toread
;
2886 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2889 if (!bh
) /* A hole? */
2890 memset(data
, 0, tocopy
);
2892 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2902 /* Write to quotafile (we know the transaction is already started and has
2903 * enough credits) */
2904 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2905 const char *data
, size_t len
, loff_t off
)
2907 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2908 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2910 int offset
= off
& (sb
->s_blocksize
- 1);
2912 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2913 size_t towrite
= len
;
2914 struct buffer_head
*bh
;
2915 handle_t
*handle
= journal_current_handle();
2918 printk(KERN_WARNING
"EXT3-fs: Quota write (off=%Lu, len=%Lu)"
2919 " cancelled because transaction is not started.\n",
2920 (unsigned long long)off
, (unsigned long long)len
);
2923 mutex_lock_nested(&inode
->i_mutex
, I_MUTEX_QUOTA
);
2924 while (towrite
> 0) {
2925 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2926 sb
->s_blocksize
- offset
: towrite
;
2927 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2930 if (journal_quota
) {
2931 err
= ext3_journal_get_write_access(handle
, bh
);
2938 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2939 flush_dcache_page(bh
->b_page
);
2942 err
= ext3_journal_dirty_metadata(handle
, bh
);
2944 /* Always do at least ordered writes for quotas */
2945 err
= ext3_journal_dirty_data(handle
, bh
);
2946 mark_buffer_dirty(bh
);
2957 if (len
== towrite
) {
2958 mutex_unlock(&inode
->i_mutex
);
2961 if (inode
->i_size
< off
+len
-towrite
) {
2962 i_size_write(inode
, off
+len
-towrite
);
2963 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
2966 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2967 ext3_mark_inode_dirty(handle
, inode
);
2968 mutex_unlock(&inode
->i_mutex
);
2969 return len
- towrite
;
2974 static int ext3_get_sb(struct file_system_type
*fs_type
,
2975 int flags
, const char *dev_name
, void *data
, struct vfsmount
*mnt
)
2977 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
, mnt
);
2980 static struct file_system_type ext3_fs_type
= {
2981 .owner
= THIS_MODULE
,
2983 .get_sb
= ext3_get_sb
,
2984 .kill_sb
= kill_block_super
,
2985 .fs_flags
= FS_REQUIRES_DEV
,
2988 static int __init
init_ext3_fs(void)
2990 int err
= init_ext3_xattr();
2993 err
= init_inodecache();
2996 err
= register_filesystem(&ext3_fs_type
);
3001 destroy_inodecache();
3007 static void __exit
exit_ext3_fs(void)
3009 unregister_filesystem(&ext3_fs_type
);
3010 destroy_inodecache();
3014 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
3015 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
3016 MODULE_LICENSE("GPL");
3017 module_init(init_ext3_fs
)
3018 module_exit(exit_ext3_fs
)