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/config.h>
20 #include <linux/module.h>
21 #include <linux/string.h>
23 #include <linux/time.h>
24 #include <linux/jbd.h>
25 #include <linux/ext3_fs.h>
26 #include <linux/ext3_jbd.h>
27 #include <linux/slab.h>
28 #include <linux/init.h>
29 #include <linux/blkdev.h>
30 #include <linux/parser.h>
31 #include <linux/smp_lock.h>
32 #include <linux/buffer_head.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>
40 #include <asm/uaccess.h>
46 static int ext3_load_journal(struct super_block
*, struct ext3_super_block
*);
47 static int ext3_create_journal(struct super_block
*, struct ext3_super_block
*,
49 static void ext3_commit_super (struct super_block
* sb
,
50 struct ext3_super_block
* es
,
52 static void ext3_mark_recovery_complete(struct super_block
* sb
,
53 struct ext3_super_block
* es
);
54 static void ext3_clear_journal_err(struct super_block
* sb
,
55 struct ext3_super_block
* es
);
56 static int ext3_sync_fs(struct super_block
*sb
, int wait
);
57 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
59 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
);
60 static int ext3_statfs (struct super_block
* sb
, struct kstatfs
* buf
);
61 static void ext3_unlockfs(struct super_block
*sb
);
62 static void ext3_write_super (struct super_block
* sb
);
63 static void ext3_write_super_lockfs(struct super_block
*sb
);
66 * Wrappers for journal_start/end.
68 * The only special thing we need to do here is to make sure that all
69 * journal_end calls result in the superblock being marked dirty, so
70 * that sync() will call the filesystem's write_super callback if
73 handle_t
*ext3_journal_start_sb(struct super_block
*sb
, int nblocks
)
77 if (sb
->s_flags
& MS_RDONLY
)
78 return ERR_PTR(-EROFS
);
80 /* Special case here: if the journal has aborted behind our
81 * backs (eg. EIO in the commit thread), then we still need to
82 * take the FS itself readonly cleanly. */
83 journal
= EXT3_SB(sb
)->s_journal
;
84 if (is_journal_aborted(journal
)) {
85 ext3_abort(sb
, __FUNCTION__
,
86 "Detected aborted journal");
87 return ERR_PTR(-EROFS
);
90 return journal_start(journal
, nblocks
);
94 * The only special thing we need to do here is to make sure that all
95 * journal_stop calls result in the superblock being marked dirty, so
96 * that sync() will call the filesystem's write_super callback if
99 int __ext3_journal_stop(const char *where
, handle_t
*handle
)
101 struct super_block
*sb
;
105 sb
= handle
->h_transaction
->t_journal
->j_private
;
107 rc
= journal_stop(handle
);
112 __ext3_std_error(sb
, where
, err
);
116 void ext3_journal_abort_handle(const char *caller
, const char *err_fn
,
117 struct buffer_head
*bh
, handle_t
*handle
, int err
)
120 const char *errstr
= ext3_decode_error(NULL
, err
, nbuf
);
123 BUFFER_TRACE(bh
, "abort");
128 if (is_handle_aborted(handle
))
131 printk(KERN_ERR
"%s: aborting transaction: %s in %s\n",
132 caller
, errstr
, err_fn
);
134 journal_abort_handle(handle
);
137 /* Deal with the reporting of failure conditions on a filesystem such as
138 * inconsistencies detected or read IO failures.
140 * On ext2, we can store the error state of the filesystem in the
141 * superblock. That is not possible on ext3, because we may have other
142 * write ordering constraints on the superblock which prevent us from
143 * writing it out straight away; and given that the journal is about to
144 * be aborted, we can't rely on the current, or future, transactions to
145 * write out the superblock safely.
147 * We'll just use the journal_abort() error code to record an error in
148 * the journal instead. On recovery, the journal will compain about
149 * that error until we've noted it down and cleared it.
152 static void ext3_handle_error(struct super_block
*sb
)
154 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
156 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
157 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
159 if (sb
->s_flags
& MS_RDONLY
)
162 if (test_opt (sb
, ERRORS_RO
)) {
163 printk (KERN_CRIT
"Remounting filesystem read-only\n");
164 sb
->s_flags
|= MS_RDONLY
;
166 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
168 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
170 journal_abort(journal
, -EIO
);
172 if (test_opt(sb
, ERRORS_PANIC
))
173 panic("EXT3-fs (device %s): panic forced after error\n",
175 ext3_commit_super(sb
, es
, 1);
178 void ext3_error (struct super_block
* sb
, const char * function
,
179 const char * fmt
, ...)
184 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
189 ext3_handle_error(sb
);
192 static const char *ext3_decode_error(struct super_block
* sb
, int errno
,
199 errstr
= "IO failure";
202 errstr
= "Out of memory";
205 if (!sb
|| EXT3_SB(sb
)->s_journal
->j_flags
& JFS_ABORT
)
206 errstr
= "Journal has aborted";
208 errstr
= "Readonly filesystem";
211 /* If the caller passed in an extra buffer for unknown
212 * errors, textualise them now. Else we just return
215 /* Check for truncated error codes... */
216 if (snprintf(nbuf
, 16, "error %d", -errno
) >= 0)
225 /* __ext3_std_error decodes expected errors from journaling functions
226 * automatically and invokes the appropriate error response. */
228 void __ext3_std_error (struct super_block
* sb
, const char * function
,
234 /* Special case: if the error is EROFS, and we're not already
235 * inside a transaction, then there's really no point in logging
237 if (errno
== -EROFS
&& journal_current_handle() == NULL
&&
238 (sb
->s_flags
& MS_RDONLY
))
241 errstr
= ext3_decode_error(sb
, errno
, nbuf
);
242 printk (KERN_CRIT
"EXT3-fs error (device %s) in %s: %s\n",
243 sb
->s_id
, function
, errstr
);
245 ext3_handle_error(sb
);
249 * ext3_abort is a much stronger failure handler than ext3_error. The
250 * abort function may be used to deal with unrecoverable failures such
251 * as journal IO errors or ENOMEM at a critical moment in log management.
253 * We unconditionally force the filesystem into an ABORT|READONLY state,
254 * unless the error response on the fs has been set to panic in which
255 * case we take the easy way out and panic immediately.
258 void ext3_abort (struct super_block
* sb
, const char * function
,
259 const char * fmt
, ...)
263 printk (KERN_CRIT
"ext3_abort called.\n");
266 printk(KERN_CRIT
"EXT3-fs error (device %s): %s: ",sb
->s_id
, function
);
271 if (test_opt(sb
, ERRORS_PANIC
))
272 panic("EXT3-fs panic from previous error\n");
274 if (sb
->s_flags
& MS_RDONLY
)
277 printk(KERN_CRIT
"Remounting filesystem read-only\n");
278 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
279 sb
->s_flags
|= MS_RDONLY
;
280 EXT3_SB(sb
)->s_mount_opt
|= EXT3_MOUNT_ABORT
;
281 journal_abort(EXT3_SB(sb
)->s_journal
, -EIO
);
284 void ext3_warning (struct super_block
* sb
, const char * function
,
285 const char * fmt
, ...)
290 printk(KERN_WARNING
"EXT3-fs warning (device %s): %s: ",
297 void ext3_update_dynamic_rev(struct super_block
*sb
)
299 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
301 if (le32_to_cpu(es
->s_rev_level
) > EXT3_GOOD_OLD_REV
)
304 ext3_warning(sb
, __FUNCTION__
,
305 "updating to rev %d because of new feature flag, "
306 "running e2fsck is recommended",
309 es
->s_first_ino
= cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO
);
310 es
->s_inode_size
= cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE
);
311 es
->s_rev_level
= cpu_to_le32(EXT3_DYNAMIC_REV
);
312 /* leave es->s_feature_*compat flags alone */
313 /* es->s_uuid will be set by e2fsck if empty */
316 * The rest of the superblock fields should be zero, and if not it
317 * means they are likely already in use, so leave them alone. We
318 * can leave it up to e2fsck to clean up any inconsistencies there.
323 * Open the external journal device
325 static struct block_device
*ext3_blkdev_get(dev_t dev
)
327 struct block_device
*bdev
;
328 char b
[BDEVNAME_SIZE
];
330 bdev
= open_by_devnum(dev
, FMODE_READ
|FMODE_WRITE
);
336 printk(KERN_ERR
"EXT3: failed to open journal device %s: %ld\n",
337 __bdevname(dev
, b
), PTR_ERR(bdev
));
342 * Release the journal device
344 static int ext3_blkdev_put(struct block_device
*bdev
)
347 return blkdev_put(bdev
);
350 static int ext3_blkdev_remove(struct ext3_sb_info
*sbi
)
352 struct block_device
*bdev
;
355 bdev
= sbi
->journal_bdev
;
357 ret
= ext3_blkdev_put(bdev
);
358 sbi
->journal_bdev
= NULL
;
363 static inline struct inode
*orphan_list_entry(struct list_head
*l
)
365 return &list_entry(l
, struct ext3_inode_info
, i_orphan
)->vfs_inode
;
368 static void dump_orphan_list(struct super_block
*sb
, struct ext3_sb_info
*sbi
)
372 printk(KERN_ERR
"sb orphan head is %d\n",
373 le32_to_cpu(sbi
->s_es
->s_last_orphan
));
375 printk(KERN_ERR
"sb_info orphan list:\n");
376 list_for_each(l
, &sbi
->s_orphan
) {
377 struct inode
*inode
= orphan_list_entry(l
);
379 "inode %s:%ld at %p: mode %o, nlink %d, next %d\n",
380 inode
->i_sb
->s_id
, inode
->i_ino
, inode
,
381 inode
->i_mode
, inode
->i_nlink
,
386 static void ext3_put_super (struct super_block
* sb
)
388 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
389 struct ext3_super_block
*es
= sbi
->s_es
;
392 ext3_xattr_put_super(sb
);
393 journal_destroy(sbi
->s_journal
);
394 if (!(sb
->s_flags
& MS_RDONLY
)) {
395 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
396 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
397 BUFFER_TRACE(sbi
->s_sbh
, "marking dirty");
398 mark_buffer_dirty(sbi
->s_sbh
);
399 ext3_commit_super(sb
, es
, 1);
402 for (i
= 0; i
< sbi
->s_gdb_count
; i
++)
403 brelse(sbi
->s_group_desc
[i
]);
404 kfree(sbi
->s_group_desc
);
405 percpu_counter_destroy(&sbi
->s_freeblocks_counter
);
406 percpu_counter_destroy(&sbi
->s_freeinodes_counter
);
407 percpu_counter_destroy(&sbi
->s_dirs_counter
);
410 for (i
= 0; i
< MAXQUOTAS
; i
++)
411 kfree(sbi
->s_qf_names
[i
]);
414 /* Debugging code just in case the in-memory inode orphan list
415 * isn't empty. The on-disk one can be non-empty if we've
416 * detected an error and taken the fs readonly, but the
417 * in-memory list had better be clean by this point. */
418 if (!list_empty(&sbi
->s_orphan
))
419 dump_orphan_list(sb
, sbi
);
420 J_ASSERT(list_empty(&sbi
->s_orphan
));
422 invalidate_bdev(sb
->s_bdev
, 0);
423 if (sbi
->journal_bdev
&& sbi
->journal_bdev
!= sb
->s_bdev
) {
425 * Invalidate the journal device's buffers. We don't want them
426 * floating about in memory - the physical journal device may
427 * hotswapped, and it breaks the `ro-after' testing code.
429 sync_blockdev(sbi
->journal_bdev
);
430 invalidate_bdev(sbi
->journal_bdev
, 0);
431 ext3_blkdev_remove(sbi
);
433 sb
->s_fs_info
= NULL
;
438 static kmem_cache_t
*ext3_inode_cachep
;
441 * Called inside transaction, so use GFP_NOFS
443 static struct inode
*ext3_alloc_inode(struct super_block
*sb
)
445 struct ext3_inode_info
*ei
;
447 ei
= kmem_cache_alloc(ext3_inode_cachep
, SLAB_NOFS
);
450 #ifdef CONFIG_EXT3_FS_POSIX_ACL
451 ei
->i_acl
= EXT3_ACL_NOT_CACHED
;
452 ei
->i_default_acl
= EXT3_ACL_NOT_CACHED
;
454 ei
->i_block_alloc_info
= NULL
;
455 ei
->vfs_inode
.i_version
= 1;
456 return &ei
->vfs_inode
;
459 static void ext3_destroy_inode(struct inode
*inode
)
461 kmem_cache_free(ext3_inode_cachep
, EXT3_I(inode
));
464 static void init_once(void * foo
, kmem_cache_t
* cachep
, unsigned long flags
)
466 struct ext3_inode_info
*ei
= (struct ext3_inode_info
*) foo
;
468 if ((flags
& (SLAB_CTOR_VERIFY
|SLAB_CTOR_CONSTRUCTOR
)) ==
469 SLAB_CTOR_CONSTRUCTOR
) {
470 INIT_LIST_HEAD(&ei
->i_orphan
);
471 #ifdef CONFIG_EXT3_FS_XATTR
472 init_rwsem(&ei
->xattr_sem
);
474 init_MUTEX(&ei
->truncate_sem
);
475 inode_init_once(&ei
->vfs_inode
);
479 static int init_inodecache(void)
481 ext3_inode_cachep
= kmem_cache_create("ext3_inode_cache",
482 sizeof(struct ext3_inode_info
),
483 0, SLAB_RECLAIM_ACCOUNT
,
485 if (ext3_inode_cachep
== NULL
)
490 static void destroy_inodecache(void)
492 if (kmem_cache_destroy(ext3_inode_cachep
))
493 printk(KERN_INFO
"ext3_inode_cache: not all structures were freed\n");
496 static void ext3_clear_inode(struct inode
*inode
)
498 struct ext3_block_alloc_info
*rsv
= EXT3_I(inode
)->i_block_alloc_info
;
499 #ifdef CONFIG_EXT3_FS_POSIX_ACL
500 if (EXT3_I(inode
)->i_acl
&&
501 EXT3_I(inode
)->i_acl
!= EXT3_ACL_NOT_CACHED
) {
502 posix_acl_release(EXT3_I(inode
)->i_acl
);
503 EXT3_I(inode
)->i_acl
= EXT3_ACL_NOT_CACHED
;
505 if (EXT3_I(inode
)->i_default_acl
&&
506 EXT3_I(inode
)->i_default_acl
!= EXT3_ACL_NOT_CACHED
) {
507 posix_acl_release(EXT3_I(inode
)->i_default_acl
);
508 EXT3_I(inode
)->i_default_acl
= EXT3_ACL_NOT_CACHED
;
511 ext3_discard_reservation(inode
);
512 EXT3_I(inode
)->i_block_alloc_info
= NULL
;
516 static inline void ext3_show_quota_options(struct seq_file
*seq
, struct super_block
*sb
)
518 #if defined(CONFIG_QUOTA)
519 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
521 if (sbi
->s_jquota_fmt
)
522 seq_printf(seq
, ",jqfmt=%s",
523 (sbi
->s_jquota_fmt
== QFMT_VFS_OLD
) ? "vfsold": "vfsv0");
525 if (sbi
->s_qf_names
[USRQUOTA
])
526 seq_printf(seq
, ",usrjquota=%s", sbi
->s_qf_names
[USRQUOTA
]);
528 if (sbi
->s_qf_names
[GRPQUOTA
])
529 seq_printf(seq
, ",grpjquota=%s", sbi
->s_qf_names
[GRPQUOTA
]);
531 if (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
)
532 seq_puts(seq
, ",usrquota");
534 if (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)
535 seq_puts(seq
, ",grpquota");
539 static int ext3_show_options(struct seq_file
*seq
, struct vfsmount
*vfs
)
541 struct super_block
*sb
= vfs
->mnt_sb
;
543 if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
)
544 seq_puts(seq
, ",data=journal");
545 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
)
546 seq_puts(seq
, ",data=ordered");
547 else if (test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)
548 seq_puts(seq
, ",data=writeback");
550 ext3_show_quota_options(seq
, sb
);
556 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
557 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
559 static int ext3_dquot_initialize(struct inode
*inode
, int type
);
560 static int ext3_dquot_drop(struct inode
*inode
);
561 static int ext3_write_dquot(struct dquot
*dquot
);
562 static int ext3_acquire_dquot(struct dquot
*dquot
);
563 static int ext3_release_dquot(struct dquot
*dquot
);
564 static int ext3_mark_dquot_dirty(struct dquot
*dquot
);
565 static int ext3_write_info(struct super_block
*sb
, int type
);
566 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
, char *path
);
567 static int ext3_quota_on_mount(struct super_block
*sb
, int type
);
568 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
569 size_t len
, loff_t off
);
570 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
571 const char *data
, size_t len
, loff_t off
);
573 static struct dquot_operations ext3_quota_operations
= {
574 .initialize
= ext3_dquot_initialize
,
575 .drop
= ext3_dquot_drop
,
576 .alloc_space
= dquot_alloc_space
,
577 .alloc_inode
= dquot_alloc_inode
,
578 .free_space
= dquot_free_space
,
579 .free_inode
= dquot_free_inode
,
580 .transfer
= dquot_transfer
,
581 .write_dquot
= ext3_write_dquot
,
582 .acquire_dquot
= ext3_acquire_dquot
,
583 .release_dquot
= ext3_release_dquot
,
584 .mark_dirty
= ext3_mark_dquot_dirty
,
585 .write_info
= ext3_write_info
588 static struct quotactl_ops ext3_qctl_operations
= {
589 .quota_on
= ext3_quota_on
,
590 .quota_off
= vfs_quota_off
,
591 .quota_sync
= vfs_quota_sync
,
592 .get_info
= vfs_get_dqinfo
,
593 .set_info
= vfs_set_dqinfo
,
594 .get_dqblk
= vfs_get_dqblk
,
595 .set_dqblk
= vfs_set_dqblk
599 static struct super_operations ext3_sops
= {
600 .alloc_inode
= ext3_alloc_inode
,
601 .destroy_inode
= ext3_destroy_inode
,
602 .read_inode
= ext3_read_inode
,
603 .write_inode
= ext3_write_inode
,
604 .dirty_inode
= ext3_dirty_inode
,
605 .delete_inode
= ext3_delete_inode
,
606 .put_super
= ext3_put_super
,
607 .write_super
= ext3_write_super
,
608 .sync_fs
= ext3_sync_fs
,
609 .write_super_lockfs
= ext3_write_super_lockfs
,
610 .unlockfs
= ext3_unlockfs
,
611 .statfs
= ext3_statfs
,
612 .remount_fs
= ext3_remount
,
613 .clear_inode
= ext3_clear_inode
,
614 .show_options
= ext3_show_options
,
616 .quota_read
= ext3_quota_read
,
617 .quota_write
= ext3_quota_write
,
621 static struct export_operations ext3_export_ops
= {
622 .get_parent
= ext3_get_parent
,
626 Opt_bsd_df
, Opt_minix_df
, Opt_grpid
, Opt_nogrpid
,
627 Opt_resgid
, Opt_resuid
, Opt_sb
, Opt_err_cont
, Opt_err_panic
, Opt_err_ro
,
628 Opt_nouid32
, Opt_nocheck
, Opt_debug
, Opt_oldalloc
, Opt_orlov
,
629 Opt_user_xattr
, Opt_nouser_xattr
, Opt_acl
, Opt_noacl
,
630 Opt_reservation
, Opt_noreservation
, Opt_noload
, Opt_nobh
,
631 Opt_commit
, Opt_journal_update
, Opt_journal_inum
,
632 Opt_abort
, Opt_data_journal
, Opt_data_ordered
, Opt_data_writeback
,
633 Opt_usrjquota
, Opt_grpjquota
, Opt_offusrjquota
, Opt_offgrpjquota
,
634 Opt_jqfmt_vfsold
, Opt_jqfmt_vfsv0
, Opt_quota
, Opt_noquota
,
635 Opt_ignore
, Opt_barrier
, Opt_err
, Opt_resize
, Opt_usrquota
,
639 static match_table_t tokens
= {
640 {Opt_bsd_df
, "bsddf"},
641 {Opt_minix_df
, "minixdf"},
642 {Opt_grpid
, "grpid"},
643 {Opt_grpid
, "bsdgroups"},
644 {Opt_nogrpid
, "nogrpid"},
645 {Opt_nogrpid
, "sysvgroups"},
646 {Opt_resgid
, "resgid=%u"},
647 {Opt_resuid
, "resuid=%u"},
649 {Opt_err_cont
, "errors=continue"},
650 {Opt_err_panic
, "errors=panic"},
651 {Opt_err_ro
, "errors=remount-ro"},
652 {Opt_nouid32
, "nouid32"},
653 {Opt_nocheck
, "nocheck"},
654 {Opt_nocheck
, "check=none"},
655 {Opt_debug
, "debug"},
656 {Opt_oldalloc
, "oldalloc"},
657 {Opt_orlov
, "orlov"},
658 {Opt_user_xattr
, "user_xattr"},
659 {Opt_nouser_xattr
, "nouser_xattr"},
661 {Opt_noacl
, "noacl"},
662 {Opt_reservation
, "reservation"},
663 {Opt_noreservation
, "noreservation"},
664 {Opt_noload
, "noload"},
666 {Opt_commit
, "commit=%u"},
667 {Opt_journal_update
, "journal=update"},
668 {Opt_journal_inum
, "journal=%u"},
669 {Opt_abort
, "abort"},
670 {Opt_data_journal
, "data=journal"},
671 {Opt_data_ordered
, "data=ordered"},
672 {Opt_data_writeback
, "data=writeback"},
673 {Opt_offusrjquota
, "usrjquota="},
674 {Opt_usrjquota
, "usrjquota=%s"},
675 {Opt_offgrpjquota
, "grpjquota="},
676 {Opt_grpjquota
, "grpjquota=%s"},
677 {Opt_jqfmt_vfsold
, "jqfmt=vfsold"},
678 {Opt_jqfmt_vfsv0
, "jqfmt=vfsv0"},
679 {Opt_grpquota
, "grpquota"},
680 {Opt_noquota
, "noquota"},
681 {Opt_quota
, "quota"},
682 {Opt_usrquota
, "usrquota"},
683 {Opt_barrier
, "barrier=%u"},
685 {Opt_resize
, "resize"},
688 static unsigned long get_sb_block(void **data
)
690 unsigned long sb_block
;
691 char *options
= (char *) *data
;
693 if (!options
|| strncmp(options
, "sb=", 3) != 0)
694 return 1; /* Default location */
696 sb_block
= simple_strtoul(options
, &options
, 0);
697 if (*options
&& *options
!= ',') {
698 printk("EXT3-fs: Invalid sb specification: %s\n",
704 *data
= (void *) options
;
708 static int parse_options (char * options
, struct super_block
*sb
,
709 unsigned long * inum
, unsigned long *n_blocks_count
, int is_remount
)
711 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
713 substring_t args
[MAX_OPT_ARGS
];
724 while ((p
= strsep (&options
, ",")) != NULL
) {
729 token
= match_token(p
, tokens
, args
);
732 clear_opt (sbi
->s_mount_opt
, MINIX_DF
);
735 set_opt (sbi
->s_mount_opt
, MINIX_DF
);
738 set_opt (sbi
->s_mount_opt
, GRPID
);
741 clear_opt (sbi
->s_mount_opt
, GRPID
);
744 if (match_int(&args
[0], &option
))
746 sbi
->s_resuid
= option
;
749 if (match_int(&args
[0], &option
))
751 sbi
->s_resgid
= option
;
754 /* handled by get_sb_block() instead of here */
755 /* *sb_block = match_int(&args[0]); */
758 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
759 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
760 set_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
763 clear_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
764 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
765 set_opt (sbi
->s_mount_opt
, ERRORS_RO
);
768 clear_opt (sbi
->s_mount_opt
, ERRORS_RO
);
769 clear_opt (sbi
->s_mount_opt
, ERRORS_PANIC
);
770 set_opt (sbi
->s_mount_opt
, ERRORS_CONT
);
773 set_opt (sbi
->s_mount_opt
, NO_UID32
);
776 clear_opt (sbi
->s_mount_opt
, CHECK
);
779 set_opt (sbi
->s_mount_opt
, DEBUG
);
782 set_opt (sbi
->s_mount_opt
, OLDALLOC
);
785 clear_opt (sbi
->s_mount_opt
, OLDALLOC
);
787 #ifdef CONFIG_EXT3_FS_XATTR
789 set_opt (sbi
->s_mount_opt
, XATTR_USER
);
791 case Opt_nouser_xattr
:
792 clear_opt (sbi
->s_mount_opt
, XATTR_USER
);
796 case Opt_nouser_xattr
:
797 printk("EXT3 (no)user_xattr options not supported\n");
800 #ifdef CONFIG_EXT3_FS_POSIX_ACL
802 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
805 clear_opt(sbi
->s_mount_opt
, POSIX_ACL
);
810 printk("EXT3 (no)acl options not supported\n");
813 case Opt_reservation
:
814 set_opt(sbi
->s_mount_opt
, RESERVATION
);
816 case Opt_noreservation
:
817 clear_opt(sbi
->s_mount_opt
, RESERVATION
);
819 case Opt_journal_update
:
821 /* Eventually we will want to be able to create
822 a journal file here. For now, only allow the
823 user to specify an existing inode to be the
826 printk(KERN_ERR
"EXT3-fs: cannot specify "
827 "journal on remount\n");
830 set_opt (sbi
->s_mount_opt
, UPDATE_JOURNAL
);
832 case Opt_journal_inum
:
834 printk(KERN_ERR
"EXT3-fs: cannot specify "
835 "journal on remount\n");
838 if (match_int(&args
[0], &option
))
843 set_opt (sbi
->s_mount_opt
, NOLOAD
);
846 if (match_int(&args
[0], &option
))
851 option
= JBD_DEFAULT_MAX_COMMIT_AGE
;
852 sbi
->s_commit_interval
= HZ
* option
;
854 case Opt_data_journal
:
855 data_opt
= EXT3_MOUNT_JOURNAL_DATA
;
857 case Opt_data_ordered
:
858 data_opt
= EXT3_MOUNT_ORDERED_DATA
;
860 case Opt_data_writeback
:
861 data_opt
= EXT3_MOUNT_WRITEBACK_DATA
;
864 if ((sbi
->s_mount_opt
& EXT3_MOUNT_DATA_FLAGS
)
867 "EXT3-fs: cannot change data "
868 "mode on remount\n");
872 sbi
->s_mount_opt
&= ~EXT3_MOUNT_DATA_FLAGS
;
873 sbi
->s_mount_opt
|= data_opt
;
883 if (sb_any_quota_enabled(sb
)) {
885 "EXT3-fs: Cannot change journalled "
886 "quota options when quota turned on.\n");
889 qname
= match_strdup(&args
[0]);
892 "EXT3-fs: not enough memory for "
893 "storing quotafile name.\n");
896 if (sbi
->s_qf_names
[qtype
] &&
897 strcmp(sbi
->s_qf_names
[qtype
], qname
)) {
899 "EXT3-fs: %s quota file already "
900 "specified.\n", QTYPE2NAME(qtype
));
904 sbi
->s_qf_names
[qtype
] = qname
;
905 if (strchr(sbi
->s_qf_names
[qtype
], '/')) {
907 "EXT3-fs: quotafile must be on "
908 "filesystem root.\n");
909 kfree(sbi
->s_qf_names
[qtype
]);
910 sbi
->s_qf_names
[qtype
] = NULL
;
913 set_opt(sbi
->s_mount_opt
, QUOTA
);
915 case Opt_offusrjquota
:
918 case Opt_offgrpjquota
:
921 if (sb_any_quota_enabled(sb
)) {
922 printk(KERN_ERR
"EXT3-fs: Cannot change "
923 "journalled quota options when "
924 "quota turned on.\n");
928 * The space will be released later when all options
929 * are confirmed to be correct
931 sbi
->s_qf_names
[qtype
] = NULL
;
933 case Opt_jqfmt_vfsold
:
934 sbi
->s_jquota_fmt
= QFMT_VFS_OLD
;
936 case Opt_jqfmt_vfsv0
:
937 sbi
->s_jquota_fmt
= QFMT_VFS_V0
;
941 set_opt(sbi
->s_mount_opt
, QUOTA
);
942 set_opt(sbi
->s_mount_opt
, USRQUOTA
);
945 set_opt(sbi
->s_mount_opt
, QUOTA
);
946 set_opt(sbi
->s_mount_opt
, GRPQUOTA
);
949 if (sb_any_quota_enabled(sb
)) {
950 printk(KERN_ERR
"EXT3-fs: Cannot change quota "
951 "options when quota turned on.\n");
954 clear_opt(sbi
->s_mount_opt
, QUOTA
);
955 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
956 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
964 case Opt_offusrjquota
:
965 case Opt_offgrpjquota
:
966 case Opt_jqfmt_vfsold
:
967 case Opt_jqfmt_vfsv0
:
969 "EXT3-fs: journalled quota options not "
976 set_opt(sbi
->s_mount_opt
, ABORT
);
979 if (match_int(&args
[0], &option
))
982 set_opt(sbi
->s_mount_opt
, BARRIER
);
984 clear_opt(sbi
->s_mount_opt
, BARRIER
);
990 printk("EXT3-fs: resize option only available "
994 if (match_int(&args
[0], &option
) != 0)
996 *n_blocks_count
= option
;
999 set_opt(sbi
->s_mount_opt
, NOBH
);
1003 "EXT3-fs: Unrecognized mount option \"%s\" "
1004 "or missing value\n", p
);
1009 if (sbi
->s_qf_names
[USRQUOTA
] || sbi
->s_qf_names
[GRPQUOTA
]) {
1010 if ((sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
) &&
1011 sbi
->s_qf_names
[USRQUOTA
])
1012 clear_opt(sbi
->s_mount_opt
, USRQUOTA
);
1014 if ((sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
) &&
1015 sbi
->s_qf_names
[GRPQUOTA
])
1016 clear_opt(sbi
->s_mount_opt
, GRPQUOTA
);
1018 if ((sbi
->s_qf_names
[USRQUOTA
] &&
1019 (sbi
->s_mount_opt
& EXT3_MOUNT_GRPQUOTA
)) ||
1020 (sbi
->s_qf_names
[GRPQUOTA
] &&
1021 (sbi
->s_mount_opt
& EXT3_MOUNT_USRQUOTA
))) {
1022 printk(KERN_ERR
"EXT3-fs: old and new quota "
1023 "format mixing.\n");
1027 if (!sbi
->s_jquota_fmt
) {
1028 printk(KERN_ERR
"EXT3-fs: journalled quota format "
1029 "not specified.\n");
1033 if (sbi
->s_jquota_fmt
) {
1034 printk(KERN_ERR
"EXT3-fs: journalled quota format "
1035 "specified with no journalling "
1044 static int ext3_setup_super(struct super_block
*sb
, struct ext3_super_block
*es
,
1047 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1050 if (le32_to_cpu(es
->s_rev_level
) > EXT3_MAX_SUPP_REV
) {
1051 printk (KERN_ERR
"EXT3-fs warning: revision level too high, "
1052 "forcing read-only mode\n");
1057 if (!(sbi
->s_mount_state
& EXT3_VALID_FS
))
1058 printk (KERN_WARNING
"EXT3-fs warning: mounting unchecked fs, "
1059 "running e2fsck is recommended\n");
1060 else if ((sbi
->s_mount_state
& EXT3_ERROR_FS
))
1061 printk (KERN_WARNING
1062 "EXT3-fs warning: mounting fs with errors, "
1063 "running e2fsck is recommended\n");
1064 else if ((__s16
) le16_to_cpu(es
->s_max_mnt_count
) >= 0 &&
1065 le16_to_cpu(es
->s_mnt_count
) >=
1066 (unsigned short) (__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1067 printk (KERN_WARNING
1068 "EXT3-fs warning: maximal mount count reached, "
1069 "running e2fsck is recommended\n");
1070 else if (le32_to_cpu(es
->s_checkinterval
) &&
1071 (le32_to_cpu(es
->s_lastcheck
) +
1072 le32_to_cpu(es
->s_checkinterval
) <= get_seconds()))
1073 printk (KERN_WARNING
1074 "EXT3-fs warning: checktime reached, "
1075 "running e2fsck is recommended\n");
1077 /* @@@ We _will_ want to clear the valid bit if we find
1078 inconsistencies, to force a fsck at reboot. But for
1079 a plain journaled filesystem we can keep it set as
1080 valid forever! :) */
1081 es
->s_state
= cpu_to_le16(le16_to_cpu(es
->s_state
) & ~EXT3_VALID_FS
);
1083 if (!(__s16
) le16_to_cpu(es
->s_max_mnt_count
))
1084 es
->s_max_mnt_count
= cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT
);
1085 es
->s_mnt_count
=cpu_to_le16(le16_to_cpu(es
->s_mnt_count
) + 1);
1086 es
->s_mtime
= cpu_to_le32(get_seconds());
1087 ext3_update_dynamic_rev(sb
);
1088 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
1090 ext3_commit_super(sb
, es
, 1);
1091 if (test_opt(sb
, DEBUG
))
1092 printk(KERN_INFO
"[EXT3 FS bs=%lu, gc=%lu, "
1093 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1095 sbi
->s_groups_count
,
1096 EXT3_BLOCKS_PER_GROUP(sb
),
1097 EXT3_INODES_PER_GROUP(sb
),
1100 printk(KERN_INFO
"EXT3 FS on %s, ", sb
->s_id
);
1101 if (EXT3_SB(sb
)->s_journal
->j_inode
== NULL
) {
1102 char b
[BDEVNAME_SIZE
];
1104 printk("external journal on %s\n",
1105 bdevname(EXT3_SB(sb
)->s_journal
->j_dev
, b
));
1107 printk("internal journal\n");
1112 /* Called at mount-time, super-block is locked */
1113 static int ext3_check_descriptors (struct super_block
* sb
)
1115 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1116 unsigned long block
= le32_to_cpu(sbi
->s_es
->s_first_data_block
);
1117 struct ext3_group_desc
* gdp
= NULL
;
1121 ext3_debug ("Checking group descriptors");
1123 for (i
= 0; i
< sbi
->s_groups_count
; i
++)
1125 if ((i
% EXT3_DESC_PER_BLOCK(sb
)) == 0)
1126 gdp
= (struct ext3_group_desc
*)
1127 sbi
->s_group_desc
[desc_block
++]->b_data
;
1128 if (le32_to_cpu(gdp
->bg_block_bitmap
) < block
||
1129 le32_to_cpu(gdp
->bg_block_bitmap
) >=
1130 block
+ EXT3_BLOCKS_PER_GROUP(sb
))
1132 ext3_error (sb
, "ext3_check_descriptors",
1133 "Block bitmap for group %d"
1134 " not in group (block %lu)!",
1136 le32_to_cpu(gdp
->bg_block_bitmap
));
1139 if (le32_to_cpu(gdp
->bg_inode_bitmap
) < block
||
1140 le32_to_cpu(gdp
->bg_inode_bitmap
) >=
1141 block
+ EXT3_BLOCKS_PER_GROUP(sb
))
1143 ext3_error (sb
, "ext3_check_descriptors",
1144 "Inode bitmap for group %d"
1145 " not in group (block %lu)!",
1147 le32_to_cpu(gdp
->bg_inode_bitmap
));
1150 if (le32_to_cpu(gdp
->bg_inode_table
) < block
||
1151 le32_to_cpu(gdp
->bg_inode_table
) + sbi
->s_itb_per_group
>=
1152 block
+ EXT3_BLOCKS_PER_GROUP(sb
))
1154 ext3_error (sb
, "ext3_check_descriptors",
1155 "Inode table for group %d"
1156 " not in group (block %lu)!",
1158 le32_to_cpu(gdp
->bg_inode_table
));
1161 block
+= EXT3_BLOCKS_PER_GROUP(sb
);
1165 sbi
->s_es
->s_free_blocks_count
=cpu_to_le32(ext3_count_free_blocks(sb
));
1166 sbi
->s_es
->s_free_inodes_count
=cpu_to_le32(ext3_count_free_inodes(sb
));
1171 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1172 * the superblock) which were deleted from all directories, but held open by
1173 * a process at the time of a crash. We walk the list and try to delete these
1174 * inodes at recovery time (only with a read-write filesystem).
1176 * In order to keep the orphan inode chain consistent during traversal (in
1177 * case of crash during recovery), we link each inode into the superblock
1178 * orphan list_head and handle it the same way as an inode deletion during
1179 * normal operation (which journals the operations for us).
1181 * We only do an iget() and an iput() on each inode, which is very safe if we
1182 * accidentally point at an in-use or already deleted inode. The worst that
1183 * can happen in this case is that we get a "bit already cleared" message from
1184 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1185 * e2fsck was run on this filesystem, and it must have already done the orphan
1186 * inode cleanup for us, so we can safely abort without any further action.
1188 static void ext3_orphan_cleanup (struct super_block
* sb
,
1189 struct ext3_super_block
* es
)
1191 unsigned int s_flags
= sb
->s_flags
;
1192 int nr_orphans
= 0, nr_truncates
= 0;
1196 if (!es
->s_last_orphan
) {
1197 jbd_debug(4, "no orphan inodes to clean up\n");
1201 if (EXT3_SB(sb
)->s_mount_state
& EXT3_ERROR_FS
) {
1202 if (es
->s_last_orphan
)
1203 jbd_debug(1, "Errors on filesystem, "
1204 "clearing orphan list.\n");
1205 es
->s_last_orphan
= 0;
1206 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1210 if (s_flags
& MS_RDONLY
) {
1211 printk(KERN_INFO
"EXT3-fs: %s: orphan cleanup on readonly fs\n",
1213 sb
->s_flags
&= ~MS_RDONLY
;
1216 /* Needed for iput() to work correctly and not trash data */
1217 sb
->s_flags
|= MS_ACTIVE
;
1218 /* Turn on quotas so that they are updated correctly */
1219 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1220 if (EXT3_SB(sb
)->s_qf_names
[i
]) {
1221 int ret
= ext3_quota_on_mount(sb
, i
);
1224 "EXT3-fs: Cannot turn on journalled "
1225 "quota: error %d\n", ret
);
1230 while (es
->s_last_orphan
) {
1231 struct inode
*inode
;
1234 ext3_orphan_get(sb
, le32_to_cpu(es
->s_last_orphan
)))) {
1235 es
->s_last_orphan
= 0;
1239 list_add(&EXT3_I(inode
)->i_orphan
, &EXT3_SB(sb
)->s_orphan
);
1241 if (inode
->i_nlink
) {
1243 "%s: truncating inode %ld to %Ld bytes\n",
1244 __FUNCTION__
, inode
->i_ino
, inode
->i_size
);
1245 jbd_debug(2, "truncating inode %ld to %Ld bytes\n",
1246 inode
->i_ino
, inode
->i_size
);
1247 ext3_truncate(inode
);
1251 "%s: deleting unreferenced inode %ld\n",
1252 __FUNCTION__
, inode
->i_ino
);
1253 jbd_debug(2, "deleting unreferenced inode %ld\n",
1257 iput(inode
); /* The delete magic happens here! */
1260 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1263 printk(KERN_INFO
"EXT3-fs: %s: %d orphan inode%s deleted\n",
1264 sb
->s_id
, PLURAL(nr_orphans
));
1266 printk(KERN_INFO
"EXT3-fs: %s: %d truncate%s cleaned up\n",
1267 sb
->s_id
, PLURAL(nr_truncates
));
1269 /* Turn quotas off */
1270 for (i
= 0; i
< MAXQUOTAS
; i
++) {
1271 if (sb_dqopt(sb
)->files
[i
])
1272 vfs_quota_off(sb
, i
);
1275 sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
1278 #define log2(n) ffz(~(n))
1281 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1282 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1283 * We need to be 1 filesystem block less than the 2^32 sector limit.
1285 static loff_t
ext3_max_size(int bits
)
1287 loff_t res
= EXT3_NDIR_BLOCKS
;
1288 /* This constant is calculated to be the largest file size for a
1289 * dense, 4k-blocksize file such that the total number of
1290 * sectors in the file, including data and all indirect blocks,
1291 * does not exceed 2^32. */
1292 const loff_t upper_limit
= 0x1ff7fffd000LL
;
1294 res
+= 1LL << (bits
-2);
1295 res
+= 1LL << (2*(bits
-2));
1296 res
+= 1LL << (3*(bits
-2));
1298 if (res
> upper_limit
)
1303 static unsigned long descriptor_loc(struct super_block
*sb
,
1304 unsigned long logic_sb_block
,
1307 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1308 unsigned long bg
, first_data_block
, first_meta_bg
;
1311 first_data_block
= le32_to_cpu(sbi
->s_es
->s_first_data_block
);
1312 first_meta_bg
= le32_to_cpu(sbi
->s_es
->s_first_meta_bg
);
1314 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_META_BG
) ||
1316 return (logic_sb_block
+ nr
+ 1);
1317 bg
= sbi
->s_desc_per_block
* nr
;
1318 if (ext3_bg_has_super(sb
, bg
))
1320 return (first_data_block
+ has_super
+ (bg
* sbi
->s_blocks_per_group
));
1324 static int ext3_fill_super (struct super_block
*sb
, void *data
, int silent
)
1326 struct buffer_head
* bh
;
1327 struct ext3_super_block
*es
= NULL
;
1328 struct ext3_sb_info
*sbi
;
1329 unsigned long block
;
1330 unsigned long sb_block
= get_sb_block(&data
);
1331 unsigned long logic_sb_block
;
1332 unsigned long offset
= 0;
1333 unsigned long journal_inum
= 0;
1334 unsigned long def_mount_opts
;
1343 sbi
= kmalloc(sizeof(*sbi
), GFP_KERNEL
);
1346 sb
->s_fs_info
= sbi
;
1347 memset(sbi
, 0, sizeof(*sbi
));
1348 sbi
->s_mount_opt
= 0;
1349 sbi
->s_resuid
= EXT3_DEF_RESUID
;
1350 sbi
->s_resgid
= EXT3_DEF_RESGID
;
1354 blocksize
= sb_min_blocksize(sb
, EXT3_MIN_BLOCK_SIZE
);
1356 printk(KERN_ERR
"EXT3-fs: unable to set blocksize\n");
1361 * The ext3 superblock will not be buffer aligned for other than 1kB
1362 * block sizes. We need to calculate the offset from buffer start.
1364 if (blocksize
!= EXT3_MIN_BLOCK_SIZE
) {
1365 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1366 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1368 logic_sb_block
= sb_block
;
1371 if (!(bh
= sb_bread(sb
, logic_sb_block
))) {
1372 printk (KERN_ERR
"EXT3-fs: unable to read superblock\n");
1376 * Note: s_es must be initialized as soon as possible because
1377 * some ext3 macro-instructions depend on its value
1379 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1381 sb
->s_magic
= le16_to_cpu(es
->s_magic
);
1382 if (sb
->s_magic
!= EXT3_SUPER_MAGIC
)
1385 /* Set defaults before we parse the mount options */
1386 def_mount_opts
= le32_to_cpu(es
->s_default_mount_opts
);
1387 if (def_mount_opts
& EXT3_DEFM_DEBUG
)
1388 set_opt(sbi
->s_mount_opt
, DEBUG
);
1389 if (def_mount_opts
& EXT3_DEFM_BSDGROUPS
)
1390 set_opt(sbi
->s_mount_opt
, GRPID
);
1391 if (def_mount_opts
& EXT3_DEFM_UID16
)
1392 set_opt(sbi
->s_mount_opt
, NO_UID32
);
1393 if (def_mount_opts
& EXT3_DEFM_XATTR_USER
)
1394 set_opt(sbi
->s_mount_opt
, XATTR_USER
);
1395 if (def_mount_opts
& EXT3_DEFM_ACL
)
1396 set_opt(sbi
->s_mount_opt
, POSIX_ACL
);
1397 if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_DATA
)
1398 sbi
->s_mount_opt
|= EXT3_MOUNT_JOURNAL_DATA
;
1399 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_ORDERED
)
1400 sbi
->s_mount_opt
|= EXT3_MOUNT_ORDERED_DATA
;
1401 else if ((def_mount_opts
& EXT3_DEFM_JMODE
) == EXT3_DEFM_JMODE_WBACK
)
1402 sbi
->s_mount_opt
|= EXT3_MOUNT_WRITEBACK_DATA
;
1404 if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_PANIC
)
1405 set_opt(sbi
->s_mount_opt
, ERRORS_PANIC
);
1406 else if (le16_to_cpu(sbi
->s_es
->s_errors
) == EXT3_ERRORS_RO
)
1407 set_opt(sbi
->s_mount_opt
, ERRORS_RO
);
1409 sbi
->s_resuid
= le16_to_cpu(es
->s_def_resuid
);
1410 sbi
->s_resgid
= le16_to_cpu(es
->s_def_resgid
);
1412 set_opt(sbi
->s_mount_opt
, RESERVATION
);
1414 if (!parse_options ((char *) data
, sb
, &journal_inum
, NULL
, 0))
1417 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
1418 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
1420 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
&&
1421 (EXT3_HAS_COMPAT_FEATURE(sb
, ~0U) ||
1422 EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~0U) ||
1423 EXT3_HAS_INCOMPAT_FEATURE(sb
, ~0U)))
1425 "EXT3-fs warning: feature flags set on rev 0 fs, "
1426 "running e2fsck is recommended\n");
1428 * Check feature flags regardless of the revision level, since we
1429 * previously didn't change the revision level when setting the flags,
1430 * so there is a chance incompat flags are set on a rev 0 filesystem.
1432 features
= EXT3_HAS_INCOMPAT_FEATURE(sb
, ~EXT3_FEATURE_INCOMPAT_SUPP
);
1434 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount because of "
1435 "unsupported optional features (%x).\n",
1436 sb
->s_id
, le32_to_cpu(features
));
1439 features
= EXT3_HAS_RO_COMPAT_FEATURE(sb
, ~EXT3_FEATURE_RO_COMPAT_SUPP
);
1440 if (!(sb
->s_flags
& MS_RDONLY
) && features
) {
1441 printk(KERN_ERR
"EXT3-fs: %s: couldn't mount RDWR because of "
1442 "unsupported optional features (%x).\n",
1443 sb
->s_id
, le32_to_cpu(features
));
1446 blocksize
= BLOCK_SIZE
<< le32_to_cpu(es
->s_log_block_size
);
1448 if (blocksize
< EXT3_MIN_BLOCK_SIZE
||
1449 blocksize
> EXT3_MAX_BLOCK_SIZE
) {
1451 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1452 blocksize
, sb
->s_id
);
1456 hblock
= bdev_hardsect_size(sb
->s_bdev
);
1457 if (sb
->s_blocksize
!= blocksize
) {
1459 * Make sure the blocksize for the filesystem is larger
1460 * than the hardware sectorsize for the machine.
1462 if (blocksize
< hblock
) {
1463 printk(KERN_ERR
"EXT3-fs: blocksize %d too small for "
1464 "device blocksize %d.\n", blocksize
, hblock
);
1469 sb_set_blocksize(sb
, blocksize
);
1470 logic_sb_block
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) / blocksize
;
1471 offset
= (sb_block
* EXT3_MIN_BLOCK_SIZE
) % blocksize
;
1472 bh
= sb_bread(sb
, logic_sb_block
);
1475 "EXT3-fs: Can't read superblock on 2nd try.\n");
1478 es
= (struct ext3_super_block
*)(((char *)bh
->b_data
) + offset
);
1480 if (es
->s_magic
!= cpu_to_le16(EXT3_SUPER_MAGIC
)) {
1482 "EXT3-fs: Magic mismatch, very weird !\n");
1487 sb
->s_maxbytes
= ext3_max_size(sb
->s_blocksize_bits
);
1489 if (le32_to_cpu(es
->s_rev_level
) == EXT3_GOOD_OLD_REV
) {
1490 sbi
->s_inode_size
= EXT3_GOOD_OLD_INODE_SIZE
;
1491 sbi
->s_first_ino
= EXT3_GOOD_OLD_FIRST_INO
;
1493 sbi
->s_inode_size
= le16_to_cpu(es
->s_inode_size
);
1494 sbi
->s_first_ino
= le32_to_cpu(es
->s_first_ino
);
1495 if ((sbi
->s_inode_size
< EXT3_GOOD_OLD_INODE_SIZE
) ||
1496 (sbi
->s_inode_size
& (sbi
->s_inode_size
- 1)) ||
1497 (sbi
->s_inode_size
> blocksize
)) {
1499 "EXT3-fs: unsupported inode size: %d\n",
1504 sbi
->s_frag_size
= EXT3_MIN_FRAG_SIZE
<<
1505 le32_to_cpu(es
->s_log_frag_size
);
1506 if (blocksize
!= sbi
->s_frag_size
) {
1508 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1509 sbi
->s_frag_size
, blocksize
);
1512 sbi
->s_frags_per_block
= 1;
1513 sbi
->s_blocks_per_group
= le32_to_cpu(es
->s_blocks_per_group
);
1514 sbi
->s_frags_per_group
= le32_to_cpu(es
->s_frags_per_group
);
1515 sbi
->s_inodes_per_group
= le32_to_cpu(es
->s_inodes_per_group
);
1516 if (EXT3_INODE_SIZE(sb
) == 0)
1518 sbi
->s_inodes_per_block
= blocksize
/ EXT3_INODE_SIZE(sb
);
1519 if (sbi
->s_inodes_per_block
== 0)
1521 sbi
->s_itb_per_group
= sbi
->s_inodes_per_group
/
1522 sbi
->s_inodes_per_block
;
1523 sbi
->s_desc_per_block
= blocksize
/ sizeof(struct ext3_group_desc
);
1525 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
1526 sbi
->s_addr_per_block_bits
= log2(EXT3_ADDR_PER_BLOCK(sb
));
1527 sbi
->s_desc_per_block_bits
= log2(EXT3_DESC_PER_BLOCK(sb
));
1528 for (i
=0; i
< 4; i
++)
1529 sbi
->s_hash_seed
[i
] = le32_to_cpu(es
->s_hash_seed
[i
]);
1530 sbi
->s_def_hash_version
= es
->s_def_hash_version
;
1532 if (sbi
->s_blocks_per_group
> blocksize
* 8) {
1534 "EXT3-fs: #blocks per group too big: %lu\n",
1535 sbi
->s_blocks_per_group
);
1538 if (sbi
->s_frags_per_group
> blocksize
* 8) {
1540 "EXT3-fs: #fragments per group too big: %lu\n",
1541 sbi
->s_frags_per_group
);
1544 if (sbi
->s_inodes_per_group
> blocksize
* 8) {
1546 "EXT3-fs: #inodes per group too big: %lu\n",
1547 sbi
->s_inodes_per_group
);
1551 if (EXT3_BLOCKS_PER_GROUP(sb
) == 0)
1553 sbi
->s_groups_count
= (le32_to_cpu(es
->s_blocks_count
) -
1554 le32_to_cpu(es
->s_first_data_block
) +
1555 EXT3_BLOCKS_PER_GROUP(sb
) - 1) /
1556 EXT3_BLOCKS_PER_GROUP(sb
);
1557 db_count
= (sbi
->s_groups_count
+ EXT3_DESC_PER_BLOCK(sb
) - 1) /
1558 EXT3_DESC_PER_BLOCK(sb
);
1559 sbi
->s_group_desc
= kmalloc(db_count
* sizeof (struct buffer_head
*),
1561 if (sbi
->s_group_desc
== NULL
) {
1562 printk (KERN_ERR
"EXT3-fs: not enough memory\n");
1566 percpu_counter_init(&sbi
->s_freeblocks_counter
);
1567 percpu_counter_init(&sbi
->s_freeinodes_counter
);
1568 percpu_counter_init(&sbi
->s_dirs_counter
);
1569 bgl_lock_init(&sbi
->s_blockgroup_lock
);
1571 for (i
= 0; i
< db_count
; i
++) {
1572 block
= descriptor_loc(sb
, logic_sb_block
, i
);
1573 sbi
->s_group_desc
[i
] = sb_bread(sb
, block
);
1574 if (!sbi
->s_group_desc
[i
]) {
1575 printk (KERN_ERR
"EXT3-fs: "
1576 "can't read group descriptor %d\n", i
);
1581 if (!ext3_check_descriptors (sb
)) {
1582 printk (KERN_ERR
"EXT3-fs: group descriptors corrupted !\n");
1585 sbi
->s_gdb_count
= db_count
;
1586 get_random_bytes(&sbi
->s_next_generation
, sizeof(u32
));
1587 spin_lock_init(&sbi
->s_next_gen_lock
);
1588 /* per fileystem reservation list head & lock */
1589 spin_lock_init(&sbi
->s_rsv_window_lock
);
1590 sbi
->s_rsv_window_root
= RB_ROOT
;
1591 /* Add a single, static dummy reservation to the start of the
1592 * reservation window list --- it gives us a placeholder for
1593 * append-at-start-of-list which makes the allocation logic
1594 * _much_ simpler. */
1595 sbi
->s_rsv_window_head
.rsv_start
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1596 sbi
->s_rsv_window_head
.rsv_end
= EXT3_RESERVE_WINDOW_NOT_ALLOCATED
;
1597 sbi
->s_rsv_window_head
.rsv_alloc_hit
= 0;
1598 sbi
->s_rsv_window_head
.rsv_goal_size
= 0;
1599 ext3_rsv_window_add(sb
, &sbi
->s_rsv_window_head
);
1602 * set up enough so that it can read an inode
1604 sb
->s_op
= &ext3_sops
;
1605 sb
->s_export_op
= &ext3_export_ops
;
1606 sb
->s_xattr
= ext3_xattr_handlers
;
1608 sb
->s_qcop
= &ext3_qctl_operations
;
1609 sb
->dq_op
= &ext3_quota_operations
;
1611 INIT_LIST_HEAD(&sbi
->s_orphan
); /* unlinked but open files */
1615 needs_recovery
= (es
->s_last_orphan
!= 0 ||
1616 EXT3_HAS_INCOMPAT_FEATURE(sb
,
1617 EXT3_FEATURE_INCOMPAT_RECOVER
));
1620 * The first inode we look at is the journal inode. Don't try
1621 * root first: it may be modified in the journal!
1623 if (!test_opt(sb
, NOLOAD
) &&
1624 EXT3_HAS_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
)) {
1625 if (ext3_load_journal(sb
, es
))
1627 } else if (journal_inum
) {
1628 if (ext3_create_journal(sb
, es
, journal_inum
))
1633 "ext3: No journal on filesystem on %s\n",
1638 /* We have now updated the journal if required, so we can
1639 * validate the data journaling mode. */
1640 switch (test_opt(sb
, DATA_FLAGS
)) {
1642 /* No mode set, assume a default based on the journal
1643 capabilities: ORDERED_DATA if the journal can
1644 cope, else JOURNAL_DATA */
1645 if (journal_check_available_features
1646 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
))
1647 set_opt(sbi
->s_mount_opt
, ORDERED_DATA
);
1649 set_opt(sbi
->s_mount_opt
, JOURNAL_DATA
);
1652 case EXT3_MOUNT_ORDERED_DATA
:
1653 case EXT3_MOUNT_WRITEBACK_DATA
:
1654 if (!journal_check_available_features
1655 (sbi
->s_journal
, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE
)) {
1656 printk(KERN_ERR
"EXT3-fs: Journal does not support "
1657 "requested data journaling mode\n");
1664 if (test_opt(sb
, NOBH
)) {
1665 if (sb
->s_blocksize_bits
!= PAGE_CACHE_SHIFT
) {
1666 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option "
1667 "since filesystem blocksize doesn't match "
1669 clear_opt(sbi
->s_mount_opt
, NOBH
);
1671 if (!(test_opt(sb
, DATA_FLAGS
) == EXT3_MOUNT_WRITEBACK_DATA
)) {
1672 printk(KERN_WARNING
"EXT3-fs: Ignoring nobh option - "
1673 "its supported only with writeback mode\n");
1674 clear_opt(sbi
->s_mount_opt
, NOBH
);
1678 * The journal_load will have done any necessary log recovery,
1679 * so we can safely mount the rest of the filesystem now.
1682 root
= iget(sb
, EXT3_ROOT_INO
);
1683 sb
->s_root
= d_alloc_root(root
);
1685 printk(KERN_ERR
"EXT3-fs: get root inode failed\n");
1689 if (!S_ISDIR(root
->i_mode
) || !root
->i_blocks
|| !root
->i_size
) {
1692 printk(KERN_ERR
"EXT3-fs: corrupt root inode, run e2fsck\n");
1696 ext3_setup_super (sb
, es
, sb
->s_flags
& MS_RDONLY
);
1698 * akpm: core read_super() calls in here with the superblock locked.
1699 * That deadlocks, because orphan cleanup needs to lock the superblock
1700 * in numerous places. Here we just pop the lock - it's relatively
1701 * harmless, because we are now ready to accept write_super() requests,
1702 * and aviro says that's the only reason for hanging onto the
1705 EXT3_SB(sb
)->s_mount_state
|= EXT3_ORPHAN_FS
;
1706 ext3_orphan_cleanup(sb
, es
);
1707 EXT3_SB(sb
)->s_mount_state
&= ~EXT3_ORPHAN_FS
;
1709 printk (KERN_INFO
"EXT3-fs: recovery complete.\n");
1710 ext3_mark_recovery_complete(sb
, es
);
1711 printk (KERN_INFO
"EXT3-fs: mounted filesystem with %s data mode.\n",
1712 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_JOURNAL_DATA
? "journal":
1713 test_opt(sb
,DATA_FLAGS
) == EXT3_MOUNT_ORDERED_DATA
? "ordered":
1716 percpu_counter_mod(&sbi
->s_freeblocks_counter
,
1717 ext3_count_free_blocks(sb
));
1718 percpu_counter_mod(&sbi
->s_freeinodes_counter
,
1719 ext3_count_free_inodes(sb
));
1720 percpu_counter_mod(&sbi
->s_dirs_counter
,
1721 ext3_count_dirs(sb
));
1728 printk(KERN_ERR
"VFS: Can't find ext3 filesystem on dev %s.\n",
1733 journal_destroy(sbi
->s_journal
);
1735 for (i
= 0; i
< db_count
; i
++)
1736 brelse(sbi
->s_group_desc
[i
]);
1737 kfree(sbi
->s_group_desc
);
1740 for (i
= 0; i
< MAXQUOTAS
; i
++)
1741 kfree(sbi
->s_qf_names
[i
]);
1743 ext3_blkdev_remove(sbi
);
1746 sb
->s_fs_info
= NULL
;
1753 * Setup any per-fs journal parameters now. We'll do this both on
1754 * initial mount, once the journal has been initialised but before we've
1755 * done any recovery; and again on any subsequent remount.
1757 static void ext3_init_journal_params(struct super_block
*sb
, journal_t
*journal
)
1759 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
1761 if (sbi
->s_commit_interval
)
1762 journal
->j_commit_interval
= sbi
->s_commit_interval
;
1763 /* We could also set up an ext3-specific default for the commit
1764 * interval here, but for now we'll just fall back to the jbd
1767 spin_lock(&journal
->j_state_lock
);
1768 if (test_opt(sb
, BARRIER
))
1769 journal
->j_flags
|= JFS_BARRIER
;
1771 journal
->j_flags
&= ~JFS_BARRIER
;
1772 spin_unlock(&journal
->j_state_lock
);
1775 static journal_t
*ext3_get_journal(struct super_block
*sb
, int journal_inum
)
1777 struct inode
*journal_inode
;
1780 /* First, test for the existence of a valid inode on disk. Bad
1781 * things happen if we iget() an unused inode, as the subsequent
1782 * iput() will try to delete it. */
1784 journal_inode
= iget(sb
, journal_inum
);
1785 if (!journal_inode
) {
1786 printk(KERN_ERR
"EXT3-fs: no journal found.\n");
1789 if (!journal_inode
->i_nlink
) {
1790 make_bad_inode(journal_inode
);
1791 iput(journal_inode
);
1792 printk(KERN_ERR
"EXT3-fs: journal inode is deleted.\n");
1796 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
1797 journal_inode
, journal_inode
->i_size
);
1798 if (is_bad_inode(journal_inode
) || !S_ISREG(journal_inode
->i_mode
)) {
1799 printk(KERN_ERR
"EXT3-fs: invalid journal inode.\n");
1800 iput(journal_inode
);
1804 journal
= journal_init_inode(journal_inode
);
1806 printk(KERN_ERR
"EXT3-fs: Could not load journal inode\n");
1807 iput(journal_inode
);
1810 journal
->j_private
= sb
;
1811 ext3_init_journal_params(sb
, journal
);
1815 static journal_t
*ext3_get_dev_journal(struct super_block
*sb
,
1818 struct buffer_head
* bh
;
1822 int hblock
, blocksize
;
1823 unsigned long sb_block
;
1824 unsigned long offset
;
1825 struct ext3_super_block
* es
;
1826 struct block_device
*bdev
;
1828 bdev
= ext3_blkdev_get(j_dev
);
1832 if (bd_claim(bdev
, sb
)) {
1834 "EXT3: failed to claim external journal device.\n");
1839 blocksize
= sb
->s_blocksize
;
1840 hblock
= bdev_hardsect_size(bdev
);
1841 if (blocksize
< hblock
) {
1843 "EXT3-fs: blocksize too small for journal device.\n");
1847 sb_block
= EXT3_MIN_BLOCK_SIZE
/ blocksize
;
1848 offset
= EXT3_MIN_BLOCK_SIZE
% blocksize
;
1849 set_blocksize(bdev
, blocksize
);
1850 if (!(bh
= __bread(bdev
, sb_block
, blocksize
))) {
1851 printk(KERN_ERR
"EXT3-fs: couldn't read superblock of "
1852 "external journal\n");
1856 es
= (struct ext3_super_block
*) (((char *)bh
->b_data
) + offset
);
1857 if ((le16_to_cpu(es
->s_magic
) != EXT3_SUPER_MAGIC
) ||
1858 !(le32_to_cpu(es
->s_feature_incompat
) &
1859 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV
)) {
1860 printk(KERN_ERR
"EXT3-fs: external journal has "
1861 "bad superblock\n");
1866 if (memcmp(EXT3_SB(sb
)->s_es
->s_journal_uuid
, es
->s_uuid
, 16)) {
1867 printk(KERN_ERR
"EXT3-fs: journal UUID does not match\n");
1872 len
= le32_to_cpu(es
->s_blocks_count
);
1873 start
= sb_block
+ 1;
1874 brelse(bh
); /* we're done with the superblock */
1876 journal
= journal_init_dev(bdev
, sb
->s_bdev
,
1877 start
, len
, blocksize
);
1879 printk(KERN_ERR
"EXT3-fs: failed to create device journal\n");
1882 journal
->j_private
= sb
;
1883 ll_rw_block(READ
, 1, &journal
->j_sb_buffer
);
1884 wait_on_buffer(journal
->j_sb_buffer
);
1885 if (!buffer_uptodate(journal
->j_sb_buffer
)) {
1886 printk(KERN_ERR
"EXT3-fs: I/O error on journal device\n");
1889 if (be32_to_cpu(journal
->j_superblock
->s_nr_users
) != 1) {
1890 printk(KERN_ERR
"EXT3-fs: External journal has more than one "
1891 "user (unsupported) - %d\n",
1892 be32_to_cpu(journal
->j_superblock
->s_nr_users
));
1895 EXT3_SB(sb
)->journal_bdev
= bdev
;
1896 ext3_init_journal_params(sb
, journal
);
1899 journal_destroy(journal
);
1901 ext3_blkdev_put(bdev
);
1905 static int ext3_load_journal(struct super_block
* sb
,
1906 struct ext3_super_block
* es
)
1909 int journal_inum
= le32_to_cpu(es
->s_journal_inum
);
1910 dev_t journal_dev
= new_decode_dev(le32_to_cpu(es
->s_journal_dev
));
1912 int really_read_only
;
1914 really_read_only
= bdev_read_only(sb
->s_bdev
);
1917 * Are we loading a blank journal or performing recovery after a
1918 * crash? For recovery, we need to check in advance whether we
1919 * can get read-write access to the device.
1922 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
)) {
1923 if (sb
->s_flags
& MS_RDONLY
) {
1924 printk(KERN_INFO
"EXT3-fs: INFO: recovery "
1925 "required on readonly filesystem.\n");
1926 if (really_read_only
) {
1927 printk(KERN_ERR
"EXT3-fs: write access "
1928 "unavailable, cannot proceed.\n");
1931 printk (KERN_INFO
"EXT3-fs: write access will "
1932 "be enabled during recovery.\n");
1936 if (journal_inum
&& journal_dev
) {
1937 printk(KERN_ERR
"EXT3-fs: filesystem has both journal "
1938 "and inode journals!\n");
1943 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
1946 if (!(journal
= ext3_get_dev_journal(sb
, journal_dev
)))
1950 if (!really_read_only
&& test_opt(sb
, UPDATE_JOURNAL
)) {
1951 err
= journal_update_format(journal
);
1953 printk(KERN_ERR
"EXT3-fs: error updating journal.\n");
1954 journal_destroy(journal
);
1959 if (!EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
))
1960 err
= journal_wipe(journal
, !really_read_only
);
1962 err
= journal_load(journal
);
1965 printk(KERN_ERR
"EXT3-fs: error loading journal.\n");
1966 journal_destroy(journal
);
1970 EXT3_SB(sb
)->s_journal
= journal
;
1971 ext3_clear_journal_err(sb
, es
);
1975 static int ext3_create_journal(struct super_block
* sb
,
1976 struct ext3_super_block
* es
,
1981 if (sb
->s_flags
& MS_RDONLY
) {
1982 printk(KERN_ERR
"EXT3-fs: readonly filesystem when trying to "
1983 "create journal.\n");
1987 if (!(journal
= ext3_get_journal(sb
, journal_inum
)))
1990 printk(KERN_INFO
"EXT3-fs: creating new journal on inode %d\n",
1993 if (journal_create(journal
)) {
1994 printk(KERN_ERR
"EXT3-fs: error creating journal.\n");
1995 journal_destroy(journal
);
1999 EXT3_SB(sb
)->s_journal
= journal
;
2001 ext3_update_dynamic_rev(sb
);
2002 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2003 EXT3_SET_COMPAT_FEATURE(sb
, EXT3_FEATURE_COMPAT_HAS_JOURNAL
);
2005 es
->s_journal_inum
= cpu_to_le32(journal_inum
);
2008 /* Make sure we flush the recovery flag to disk. */
2009 ext3_commit_super(sb
, es
, 1);
2014 static void ext3_commit_super (struct super_block
* sb
,
2015 struct ext3_super_block
* es
,
2018 struct buffer_head
*sbh
= EXT3_SB(sb
)->s_sbh
;
2022 es
->s_wtime
= cpu_to_le32(get_seconds());
2023 es
->s_free_blocks_count
= cpu_to_le32(ext3_count_free_blocks(sb
));
2024 es
->s_free_inodes_count
= cpu_to_le32(ext3_count_free_inodes(sb
));
2025 BUFFER_TRACE(sbh
, "marking dirty");
2026 mark_buffer_dirty(sbh
);
2028 sync_dirty_buffer(sbh
);
2033 * Have we just finished recovery? If so, and if we are mounting (or
2034 * remounting) the filesystem readonly, then we will end up with a
2035 * consistent fs on disk. Record that fact.
2037 static void ext3_mark_recovery_complete(struct super_block
* sb
,
2038 struct ext3_super_block
* es
)
2040 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2042 journal_lock_updates(journal
);
2043 journal_flush(journal
);
2044 if (EXT3_HAS_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
) &&
2045 sb
->s_flags
& MS_RDONLY
) {
2046 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2048 ext3_commit_super(sb
, es
, 1);
2050 journal_unlock_updates(journal
);
2054 * If we are mounting (or read-write remounting) a filesystem whose journal
2055 * has recorded an error from a previous lifetime, move that error to the
2056 * main filesystem now.
2058 static void ext3_clear_journal_err(struct super_block
* sb
,
2059 struct ext3_super_block
* es
)
2065 journal
= EXT3_SB(sb
)->s_journal
;
2068 * Now check for any error status which may have been recorded in the
2069 * journal by a prior ext3_error() or ext3_abort()
2072 j_errno
= journal_errno(journal
);
2076 errstr
= ext3_decode_error(sb
, j_errno
, nbuf
);
2077 ext3_warning(sb
, __FUNCTION__
, "Filesystem error recorded "
2078 "from previous mount: %s", errstr
);
2079 ext3_warning(sb
, __FUNCTION__
, "Marking fs in need of "
2080 "filesystem check.");
2082 EXT3_SB(sb
)->s_mount_state
|= EXT3_ERROR_FS
;
2083 es
->s_state
|= cpu_to_le16(EXT3_ERROR_FS
);
2084 ext3_commit_super (sb
, es
, 1);
2086 journal_clear_err(journal
);
2091 * Force the running and committing transactions to commit,
2092 * and wait on the commit.
2094 int ext3_force_commit(struct super_block
*sb
)
2099 if (sb
->s_flags
& MS_RDONLY
)
2102 journal
= EXT3_SB(sb
)->s_journal
;
2104 ret
= ext3_journal_force_commit(journal
);
2109 * Ext3 always journals updates to the superblock itself, so we don't
2110 * have to propagate any other updates to the superblock on disk at this
2111 * point. Just start an async writeback to get the buffers on their way
2114 * This implicitly triggers the writebehind on sync().
2117 static void ext3_write_super (struct super_block
* sb
)
2119 if (down_trylock(&sb
->s_lock
) == 0)
2124 static int ext3_sync_fs(struct super_block
*sb
, int wait
)
2129 if (journal_start_commit(EXT3_SB(sb
)->s_journal
, &target
)) {
2131 log_wait_commit(EXT3_SB(sb
)->s_journal
, target
);
2137 * LVM calls this function before a (read-only) snapshot is created. This
2138 * gives us a chance to flush the journal completely and mark the fs clean.
2140 static void ext3_write_super_lockfs(struct super_block
*sb
)
2144 if (!(sb
->s_flags
& MS_RDONLY
)) {
2145 journal_t
*journal
= EXT3_SB(sb
)->s_journal
;
2147 /* Now we set up the journal barrier. */
2148 journal_lock_updates(journal
);
2149 journal_flush(journal
);
2151 /* Journal blocked and flushed, clear needs_recovery flag. */
2152 EXT3_CLEAR_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2153 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2158 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2159 * flag here, even though the filesystem is not technically dirty yet.
2161 static void ext3_unlockfs(struct super_block
*sb
)
2163 if (!(sb
->s_flags
& MS_RDONLY
)) {
2165 /* Reser the needs_recovery flag before the fs is unlocked. */
2166 EXT3_SET_INCOMPAT_FEATURE(sb
, EXT3_FEATURE_INCOMPAT_RECOVER
);
2167 ext3_commit_super(sb
, EXT3_SB(sb
)->s_es
, 1);
2169 journal_unlock_updates(EXT3_SB(sb
)->s_journal
);
2173 static int ext3_remount (struct super_block
* sb
, int * flags
, char * data
)
2175 struct ext3_super_block
* es
;
2176 struct ext3_sb_info
*sbi
= EXT3_SB(sb
);
2177 unsigned long n_blocks_count
= 0;
2178 unsigned long old_sb_flags
;
2179 struct ext3_mount_options old_opts
;
2185 /* Store the original options */
2186 old_sb_flags
= sb
->s_flags
;
2187 old_opts
.s_mount_opt
= sbi
->s_mount_opt
;
2188 old_opts
.s_resuid
= sbi
->s_resuid
;
2189 old_opts
.s_resgid
= sbi
->s_resgid
;
2190 old_opts
.s_commit_interval
= sbi
->s_commit_interval
;
2192 old_opts
.s_jquota_fmt
= sbi
->s_jquota_fmt
;
2193 for (i
= 0; i
< MAXQUOTAS
; i
++)
2194 old_opts
.s_qf_names
[i
] = sbi
->s_qf_names
[i
];
2198 * Allow the "check" option to be passed as a remount option.
2200 if (!parse_options(data
, sb
, NULL
, &n_blocks_count
, 1)) {
2205 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
)
2206 ext3_abort(sb
, __FUNCTION__
, "Abort forced by user");
2208 sb
->s_flags
= (sb
->s_flags
& ~MS_POSIXACL
) |
2209 ((sbi
->s_mount_opt
& EXT3_MOUNT_POSIX_ACL
) ? MS_POSIXACL
: 0);
2213 ext3_init_journal_params(sb
, sbi
->s_journal
);
2215 if ((*flags
& MS_RDONLY
) != (sb
->s_flags
& MS_RDONLY
) ||
2216 n_blocks_count
> le32_to_cpu(es
->s_blocks_count
)) {
2217 if (sbi
->s_mount_opt
& EXT3_MOUNT_ABORT
) {
2222 if (*flags
& MS_RDONLY
) {
2224 * First of all, the unconditional stuff we have to do
2225 * to disable replay of the journal when we next remount
2227 sb
->s_flags
|= MS_RDONLY
;
2230 * OK, test if we are remounting a valid rw partition
2231 * readonly, and if so set the rdonly flag and then
2232 * mark the partition as valid again.
2234 if (!(es
->s_state
& cpu_to_le16(EXT3_VALID_FS
)) &&
2235 (sbi
->s_mount_state
& EXT3_VALID_FS
))
2236 es
->s_state
= cpu_to_le16(sbi
->s_mount_state
);
2238 ext3_mark_recovery_complete(sb
, es
);
2241 if ((ret
= EXT3_HAS_RO_COMPAT_FEATURE(sb
,
2242 ~EXT3_FEATURE_RO_COMPAT_SUPP
))) {
2243 printk(KERN_WARNING
"EXT3-fs: %s: couldn't "
2244 "remount RDWR because of unsupported "
2245 "optional features (%x).\n",
2246 sb
->s_id
, le32_to_cpu(ret
));
2251 * Mounting a RDONLY partition read-write, so reread
2252 * and store the current valid flag. (It may have
2253 * been changed by e2fsck since we originally mounted
2256 ext3_clear_journal_err(sb
, es
);
2257 sbi
->s_mount_state
= le16_to_cpu(es
->s_state
);
2258 if ((ret
= ext3_group_extend(sb
, es
, n_blocks_count
))) {
2262 if (!ext3_setup_super (sb
, es
, 0))
2263 sb
->s_flags
&= ~MS_RDONLY
;
2267 /* Release old quota file names */
2268 for (i
= 0; i
< MAXQUOTAS
; i
++)
2269 if (old_opts
.s_qf_names
[i
] &&
2270 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2271 kfree(old_opts
.s_qf_names
[i
]);
2275 sb
->s_flags
= old_sb_flags
;
2276 sbi
->s_mount_opt
= old_opts
.s_mount_opt
;
2277 sbi
->s_resuid
= old_opts
.s_resuid
;
2278 sbi
->s_resgid
= old_opts
.s_resgid
;
2279 sbi
->s_commit_interval
= old_opts
.s_commit_interval
;
2281 sbi
->s_jquota_fmt
= old_opts
.s_jquota_fmt
;
2282 for (i
= 0; i
< MAXQUOTAS
; i
++) {
2283 if (sbi
->s_qf_names
[i
] &&
2284 old_opts
.s_qf_names
[i
] != sbi
->s_qf_names
[i
])
2285 kfree(sbi
->s_qf_names
[i
]);
2286 sbi
->s_qf_names
[i
] = old_opts
.s_qf_names
[i
];
2292 static int ext3_statfs (struct super_block
* sb
, struct kstatfs
* buf
)
2294 struct ext3_super_block
*es
= EXT3_SB(sb
)->s_es
;
2295 unsigned long overhead
;
2298 if (test_opt (sb
, MINIX_DF
))
2301 unsigned long ngroups
;
2302 ngroups
= EXT3_SB(sb
)->s_groups_count
;
2306 * Compute the overhead (FS structures)
2310 * All of the blocks before first_data_block are
2313 overhead
= le32_to_cpu(es
->s_first_data_block
);
2316 * Add the overhead attributed to the superblock and
2317 * block group descriptors. If the sparse superblocks
2318 * feature is turned on, then not all groups have this.
2320 for (i
= 0; i
< ngroups
; i
++) {
2321 overhead
+= ext3_bg_has_super(sb
, i
) +
2322 ext3_bg_num_gdb(sb
, i
);
2327 * Every block group has an inode bitmap, a block
2328 * bitmap, and an inode table.
2330 overhead
+= (ngroups
* (2 + EXT3_SB(sb
)->s_itb_per_group
));
2333 buf
->f_type
= EXT3_SUPER_MAGIC
;
2334 buf
->f_bsize
= sb
->s_blocksize
;
2335 buf
->f_blocks
= le32_to_cpu(es
->s_blocks_count
) - overhead
;
2336 buf
->f_bfree
= ext3_count_free_blocks (sb
);
2337 buf
->f_bavail
= buf
->f_bfree
- le32_to_cpu(es
->s_r_blocks_count
);
2338 if (buf
->f_bfree
< le32_to_cpu(es
->s_r_blocks_count
))
2340 buf
->f_files
= le32_to_cpu(es
->s_inodes_count
);
2341 buf
->f_ffree
= ext3_count_free_inodes (sb
);
2342 buf
->f_namelen
= EXT3_NAME_LEN
;
2346 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2347 * is locked for write. Otherwise the are possible deadlocks:
2348 * Process 1 Process 2
2349 * ext3_create() quota_sync()
2350 * journal_start() write_dquot()
2351 * DQUOT_INIT() down(dqio_sem)
2352 * down(dqio_sem) journal_start()
2358 static inline struct inode
*dquot_to_inode(struct dquot
*dquot
)
2360 return sb_dqopt(dquot
->dq_sb
)->files
[dquot
->dq_type
];
2363 static int ext3_dquot_initialize(struct inode
*inode
, int type
)
2368 /* We may create quota structure so we need to reserve enough blocks */
2369 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_INIT_BLOCKS(inode
->i_sb
));
2371 return PTR_ERR(handle
);
2372 ret
= dquot_initialize(inode
, type
);
2373 err
= ext3_journal_stop(handle
);
2379 static int ext3_dquot_drop(struct inode
*inode
)
2384 /* We may delete quota structure so we need to reserve enough blocks */
2385 handle
= ext3_journal_start(inode
, 2*EXT3_QUOTA_DEL_BLOCKS(inode
->i_sb
));
2387 return PTR_ERR(handle
);
2388 ret
= dquot_drop(inode
);
2389 err
= ext3_journal_stop(handle
);
2395 static int ext3_write_dquot(struct dquot
*dquot
)
2399 struct inode
*inode
;
2401 inode
= dquot_to_inode(dquot
);
2402 handle
= ext3_journal_start(inode
,
2403 EXT3_QUOTA_TRANS_BLOCKS(dquot
->dq_sb
));
2405 return PTR_ERR(handle
);
2406 ret
= dquot_commit(dquot
);
2407 err
= ext3_journal_stop(handle
);
2413 static int ext3_acquire_dquot(struct dquot
*dquot
)
2418 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2419 EXT3_QUOTA_INIT_BLOCKS(dquot
->dq_sb
));
2421 return PTR_ERR(handle
);
2422 ret
= dquot_acquire(dquot
);
2423 err
= ext3_journal_stop(handle
);
2429 static int ext3_release_dquot(struct dquot
*dquot
)
2434 handle
= ext3_journal_start(dquot_to_inode(dquot
),
2435 EXT3_QUOTA_DEL_BLOCKS(dquot
->dq_sb
));
2437 return PTR_ERR(handle
);
2438 ret
= dquot_release(dquot
);
2439 err
= ext3_journal_stop(handle
);
2445 static int ext3_mark_dquot_dirty(struct dquot
*dquot
)
2447 /* Are we journalling quotas? */
2448 if (EXT3_SB(dquot
->dq_sb
)->s_qf_names
[USRQUOTA
] ||
2449 EXT3_SB(dquot
->dq_sb
)->s_qf_names
[GRPQUOTA
]) {
2450 dquot_mark_dquot_dirty(dquot
);
2451 return ext3_write_dquot(dquot
);
2453 return dquot_mark_dquot_dirty(dquot
);
2457 static int ext3_write_info(struct super_block
*sb
, int type
)
2462 /* Data block + inode block */
2463 handle
= ext3_journal_start(sb
->s_root
->d_inode
, 2);
2465 return PTR_ERR(handle
);
2466 ret
= dquot_commit_info(sb
, type
);
2467 err
= ext3_journal_stop(handle
);
2474 * Turn on quotas during mount time - we need to find
2475 * the quota file and such...
2477 static int ext3_quota_on_mount(struct super_block
*sb
, int type
)
2479 return vfs_quota_on_mount(sb
, EXT3_SB(sb
)->s_qf_names
[type
],
2480 EXT3_SB(sb
)->s_jquota_fmt
, type
);
2484 * Standard function to be called on quota_on
2486 static int ext3_quota_on(struct super_block
*sb
, int type
, int format_id
,
2490 struct nameidata nd
;
2492 if (!test_opt(sb
, QUOTA
))
2494 /* Not journalling quota? */
2495 if (!EXT3_SB(sb
)->s_qf_names
[USRQUOTA
] &&
2496 !EXT3_SB(sb
)->s_qf_names
[GRPQUOTA
])
2497 return vfs_quota_on(sb
, type
, format_id
, path
);
2498 err
= path_lookup(path
, LOOKUP_FOLLOW
, &nd
);
2501 /* Quotafile not on the same filesystem? */
2502 if (nd
.mnt
->mnt_sb
!= sb
) {
2506 /* Quotafile not of fs root? */
2507 if (nd
.dentry
->d_parent
->d_inode
!= sb
->s_root
->d_inode
)
2509 "EXT3-fs: Quota file not on filesystem root. "
2510 "Journalled quota will not work.\n");
2512 return vfs_quota_on(sb
, type
, format_id
, path
);
2515 /* Read data from quotafile - avoid pagecache and such because we cannot afford
2516 * acquiring the locks... As quota files are never truncated and quota code
2517 * itself serializes the operations (and noone else should touch the files)
2518 * we don't have to be afraid of races */
2519 static ssize_t
ext3_quota_read(struct super_block
*sb
, int type
, char *data
,
2520 size_t len
, loff_t off
)
2522 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2523 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2525 int offset
= off
& (sb
->s_blocksize
- 1);
2528 struct buffer_head
*bh
;
2529 loff_t i_size
= i_size_read(inode
);
2533 if (off
+len
> i_size
)
2536 while (toread
> 0) {
2537 tocopy
= sb
->s_blocksize
- offset
< toread
?
2538 sb
->s_blocksize
- offset
: toread
;
2539 bh
= ext3_bread(NULL
, inode
, blk
, 0, &err
);
2542 if (!bh
) /* A hole? */
2543 memset(data
, 0, tocopy
);
2545 memcpy(data
, bh
->b_data
+offset
, tocopy
);
2555 /* Write to quotafile (we know the transaction is already started and has
2556 * enough credits) */
2557 static ssize_t
ext3_quota_write(struct super_block
*sb
, int type
,
2558 const char *data
, size_t len
, loff_t off
)
2560 struct inode
*inode
= sb_dqopt(sb
)->files
[type
];
2561 sector_t blk
= off
>> EXT3_BLOCK_SIZE_BITS(sb
);
2563 int offset
= off
& (sb
->s_blocksize
- 1);
2565 int journal_quota
= EXT3_SB(sb
)->s_qf_names
[type
] != NULL
;
2566 size_t towrite
= len
;
2567 struct buffer_head
*bh
;
2568 handle_t
*handle
= journal_current_handle();
2570 down(&inode
->i_sem
);
2571 while (towrite
> 0) {
2572 tocopy
= sb
->s_blocksize
- offset
< towrite
?
2573 sb
->s_blocksize
- offset
: towrite
;
2574 bh
= ext3_bread(handle
, inode
, blk
, 1, &err
);
2577 if (journal_quota
) {
2578 err
= ext3_journal_get_write_access(handle
, bh
);
2585 memcpy(bh
->b_data
+offset
, data
, tocopy
);
2586 flush_dcache_page(bh
->b_page
);
2589 err
= ext3_journal_dirty_metadata(handle
, bh
);
2591 /* Always do at least ordered writes for quotas */
2592 err
= ext3_journal_dirty_data(handle
, bh
);
2593 mark_buffer_dirty(bh
);
2606 if (inode
->i_size
< off
+len
-towrite
) {
2607 i_size_write(inode
, off
+len
-towrite
);
2608 EXT3_I(inode
)->i_disksize
= inode
->i_size
;
2611 inode
->i_mtime
= inode
->i_ctime
= CURRENT_TIME
;
2612 ext3_mark_inode_dirty(handle
, inode
);
2614 return len
- towrite
;
2619 static struct super_block
*ext3_get_sb(struct file_system_type
*fs_type
,
2620 int flags
, const char *dev_name
, void *data
)
2622 return get_sb_bdev(fs_type
, flags
, dev_name
, data
, ext3_fill_super
);
2625 static struct file_system_type ext3_fs_type
= {
2626 .owner
= THIS_MODULE
,
2628 .get_sb
= ext3_get_sb
,
2629 .kill_sb
= kill_block_super
,
2630 .fs_flags
= FS_REQUIRES_DEV
,
2633 static int __init
init_ext3_fs(void)
2635 int err
= init_ext3_xattr();
2638 err
= init_inodecache();
2641 err
= register_filesystem(&ext3_fs_type
);
2646 destroy_inodecache();
2652 static void __exit
exit_ext3_fs(void)
2654 unregister_filesystem(&ext3_fs_type
);
2655 destroy_inodecache();
2659 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
2660 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
2661 MODULE_LICENSE("GPL");
2662 module_init(init_ext3_fs
)
2663 module_exit(exit_ext3_fs
)