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 <asm/uaccess.h>
42 static int ext3_load_journal(struct super_block *, struct ext3_super_block *);
43 static int ext3_create_journal(struct super_block *, struct ext3_super_block *,
45 static void ext3_commit_super (struct super_block * sb,
46 struct ext3_super_block * es,
48 static void ext3_mark_recovery_complete(struct super_block * sb,
49 struct ext3_super_block * es);
50 static void ext3_clear_journal_err(struct super_block * sb,
51 struct ext3_super_block * es);
52 static int ext3_sync_fs(struct super_block *sb, int wait);
55 * Wrappers for journal_start/end.
57 * The only special thing we need to do here is to make sure that all
58 * journal_end calls result in the superblock being marked dirty, so
59 * that sync() will call the filesystem's write_super callback if
62 handle_t *ext3_journal_start_sb(struct super_block *sb, int nblocks)
66 if (sb->s_flags & MS_RDONLY)
67 return ERR_PTR(-EROFS);
69 /* Special case here: if the journal has aborted behind our
70 * backs (eg. EIO in the commit thread), then we still need to
71 * take the FS itself readonly cleanly. */
72 journal = EXT3_SB(sb)->s_journal;
73 if (is_journal_aborted(journal)) {
74 ext3_abort(sb, __FUNCTION__,
75 "Detected aborted journal");
76 return ERR_PTR(-EROFS);
79 return journal_start(journal, nblocks);
83 * The only special thing we need to do here is to make sure that all
84 * journal_stop calls result in the superblock being marked dirty, so
85 * that sync() will call the filesystem's write_super callback if
88 int __ext3_journal_stop(const char *where, handle_t *handle)
90 struct super_block *sb;
94 sb = handle->h_transaction->t_journal->j_private;
96 rc = journal_stop(handle);
101 __ext3_std_error(sb, where, err);
105 void ext3_journal_abort_handle(const char *caller, const char *err_fn,
106 struct buffer_head *bh, handle_t *handle, int err)
109 const char *errstr = ext3_decode_error(NULL, err, nbuf);
112 BUFFER_TRACE(bh, "abort");
117 if (is_handle_aborted(handle))
120 printk(KERN_ERR "%s: aborting transaction: %s in %s\n",
121 caller, errstr, err_fn);
123 journal_abort_handle(handle);
126 /* Deal with the reporting of failure conditions on a filesystem such as
127 * inconsistencies detected or read IO failures.
129 * On ext2, we can store the error state of the filesystem in the
130 * superblock. That is not possible on ext3, because we may have other
131 * write ordering constraints on the superblock which prevent us from
132 * writing it out straight away; and given that the journal is about to
133 * be aborted, we can't rely on the current, or future, transactions to
134 * write out the superblock safely.
136 * We'll just use the journal_abort() error code to record an error in
137 * the journal instead. On recovery, the journal will compain about
138 * that error until we've noted it down and cleared it.
141 static void ext3_handle_error(struct super_block *sb)
143 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
145 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
146 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
148 if (sb->s_flags & MS_RDONLY)
151 if (test_opt (sb, ERRORS_PANIC))
152 panic ("EXT3-fs (device %s): panic forced after error\n",
154 if (test_opt (sb, ERRORS_RO)) {
155 printk (KERN_CRIT "Remounting filesystem read-only\n");
156 sb->s_flags |= MS_RDONLY;
158 journal_t *journal = EXT3_SB(sb)->s_journal;
160 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
162 journal_abort(journal, -EIO);
164 ext3_commit_super(sb, es, 1);
167 void ext3_error (struct super_block * sb, const char * function,
168 const char * fmt, ...)
173 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
178 ext3_handle_error(sb);
181 const char *ext3_decode_error(struct super_block * sb, int errno, char nbuf[16])
187 errstr = "IO failure";
190 errstr = "Out of memory";
193 if (!sb || EXT3_SB(sb)->s_journal->j_flags & JFS_ABORT)
194 errstr = "Journal has aborted";
196 errstr = "Readonly filesystem";
199 /* If the caller passed in an extra buffer for unknown
200 * errors, textualise them now. Else we just return
203 /* Check for truncated error codes... */
204 if (snprintf(nbuf, 16, "error %d", -errno) >= 0)
213 /* __ext3_std_error decodes expected errors from journaling functions
214 * automatically and invokes the appropriate error response. */
216 void __ext3_std_error (struct super_block * sb, const char * function,
220 const char *errstr = ext3_decode_error(sb, errno, nbuf);
222 printk (KERN_CRIT "EXT3-fs error (device %s) in %s: %s\n",
223 sb->s_id, function, errstr);
225 ext3_handle_error(sb);
229 * ext3_abort is a much stronger failure handler than ext3_error. The
230 * abort function may be used to deal with unrecoverable failures such
231 * as journal IO errors or ENOMEM at a critical moment in log management.
233 * We unconditionally force the filesystem into an ABORT|READONLY state,
234 * unless the error response on the fs has been set to panic in which
235 * case we take the easy way out and panic immediately.
238 void ext3_abort (struct super_block * sb, const char * function,
239 const char * fmt, ...)
243 printk (KERN_CRIT "ext3_abort called.\n");
246 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
251 if (test_opt(sb, ERRORS_PANIC))
252 panic("EXT3-fs panic from previous error\n");
254 if (sb->s_flags & MS_RDONLY)
257 printk(KERN_CRIT "Remounting filesystem read-only\n");
258 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
259 sb->s_flags |= MS_RDONLY;
260 EXT3_SB(sb)->s_mount_opt |= EXT3_MOUNT_ABORT;
261 journal_abort(EXT3_SB(sb)->s_journal, -EIO);
264 /* Deal with the reporting of failure conditions while running, such as
265 * inconsistencies in operation or invalid system states.
267 * Use ext3_error() for cases of invalid filesystem states, as that will
268 * record an error on disk and force a filesystem check on the next boot.
270 NORET_TYPE void ext3_panic (struct super_block * sb, const char * function,
271 const char * fmt, ...)
276 printk(KERN_CRIT "EXT3-fs error (device %s): %s: ",sb->s_id, function);
281 /* this is to prevent panic from syncing this filesystem */
282 /* AKPM: is this sufficient? */
283 sb->s_flags |= MS_RDONLY;
284 panic ("EXT3-fs panic forced\n");
287 void ext3_warning (struct super_block * sb, const char * function,
288 const char * fmt, ...)
293 printk(KERN_WARNING "EXT3-fs warning (device %s): %s: ",
300 void ext3_update_dynamic_rev(struct super_block *sb)
302 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
304 if (le32_to_cpu(es->s_rev_level) > EXT3_GOOD_OLD_REV)
307 ext3_warning(sb, __FUNCTION__,
308 "updating to rev %d because of new feature flag, "
309 "running e2fsck is recommended",
312 es->s_first_ino = cpu_to_le32(EXT3_GOOD_OLD_FIRST_INO);
313 es->s_inode_size = cpu_to_le16(EXT3_GOOD_OLD_INODE_SIZE);
314 es->s_rev_level = cpu_to_le32(EXT3_DYNAMIC_REV);
315 /* leave es->s_feature_*compat flags alone */
316 /* es->s_uuid will be set by e2fsck if empty */
319 * The rest of the superblock fields should be zero, and if not it
320 * means they are likely already in use, so leave them alone. We
321 * can leave it up to e2fsck to clean up any inconsistencies there.
326 * Open the external journal device
328 static struct block_device *ext3_blkdev_get(dev_t dev)
330 struct block_device *bdev;
331 char b[BDEVNAME_SIZE];
333 bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE);
339 printk(KERN_ERR "EXT3: failed to open journal device %s: %ld\n",
340 __bdevname(dev, b), PTR_ERR(bdev));
345 * Release the journal device
347 static int ext3_blkdev_put(struct block_device *bdev)
350 return blkdev_put(bdev);
353 static int ext3_blkdev_remove(struct ext3_sb_info *sbi)
355 struct block_device *bdev;
358 bdev = sbi->journal_bdev;
360 ret = ext3_blkdev_put(bdev);
361 sbi->journal_bdev = NULL;
366 static inline struct inode *orphan_list_entry(struct list_head *l)
368 return &list_entry(l, struct ext3_inode_info, i_orphan)->vfs_inode;
371 static void dump_orphan_list(struct super_block *sb, struct ext3_sb_info *sbi)
375 printk(KERN_ERR "sb orphan head is %d\n",
376 le32_to_cpu(sbi->s_es->s_last_orphan));
378 printk(KERN_ERR "sb_info orphan list:\n");
379 list_for_each(l, &sbi->s_orphan) {
380 struct inode *inode = orphan_list_entry(l);
382 "inode %s:%ld at %p: mode %o, nlink %d, next %d\n",
383 inode->i_sb->s_id, inode->i_ino, inode,
384 inode->i_mode, inode->i_nlink,
389 void ext3_put_super (struct super_block * sb)
391 struct ext3_sb_info *sbi = EXT3_SB(sb);
392 struct ext3_super_block *es = sbi->s_es;
395 ext3_xattr_put_super(sb);
396 journal_destroy(sbi->s_journal);
397 if (!(sb->s_flags & MS_RDONLY)) {
398 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
399 es->s_state = cpu_to_le16(sbi->s_mount_state);
400 BUFFER_TRACE(sbi->s_sbh, "marking dirty");
401 mark_buffer_dirty(sbi->s_sbh);
402 ext3_commit_super(sb, es, 1);
405 for (i = 0; i < sbi->s_gdb_count; i++)
406 brelse(sbi->s_group_desc[i]);
407 kfree(sbi->s_group_desc);
408 percpu_counter_destroy(&sbi->s_freeblocks_counter);
409 percpu_counter_destroy(&sbi->s_freeinodes_counter);
410 percpu_counter_destroy(&sbi->s_dirs_counter);
413 for (i = 0; i < MAXQUOTAS; i++) {
414 if (sbi->s_qf_names[i])
415 kfree(sbi->s_qf_names[i]);
419 /* Debugging code just in case the in-memory inode orphan list
420 * isn't empty. The on-disk one can be non-empty if we've
421 * detected an error and taken the fs readonly, but the
422 * in-memory list had better be clean by this point. */
423 if (!list_empty(&sbi->s_orphan))
424 dump_orphan_list(sb, sbi);
425 J_ASSERT(list_empty(&sbi->s_orphan));
427 invalidate_bdev(sb->s_bdev, 0);
428 if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) {
430 * Invalidate the journal device's buffers. We don't want them
431 * floating about in memory - the physical journal device may
432 * hotswapped, and it breaks the `ro-after' testing code.
434 sync_blockdev(sbi->journal_bdev);
435 invalidate_bdev(sbi->journal_bdev, 0);
436 ext3_blkdev_remove(sbi);
438 sb->s_fs_info = NULL;
443 static kmem_cache_t *ext3_inode_cachep;
446 * Called inside transaction, so use GFP_NOFS
448 static struct inode *ext3_alloc_inode(struct super_block *sb)
450 struct ext3_inode_info *ei;
452 ei = kmem_cache_alloc(ext3_inode_cachep, SLAB_NOFS);
455 #ifdef CONFIG_EXT3_FS_POSIX_ACL
456 ei->i_acl = EXT3_ACL_NOT_CACHED;
457 ei->i_default_acl = EXT3_ACL_NOT_CACHED;
459 ei->i_rsv_window.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
460 ei->vfs_inode.i_version = 1;
461 return &ei->vfs_inode;
464 static void ext3_destroy_inode(struct inode *inode)
466 kmem_cache_free(ext3_inode_cachep, EXT3_I(inode));
469 static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags)
471 struct ext3_inode_info *ei = (struct ext3_inode_info *) foo;
473 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
474 SLAB_CTOR_CONSTRUCTOR) {
475 INIT_LIST_HEAD(&ei->i_orphan);
476 #ifdef CONFIG_EXT3_FS_XATTR
477 init_rwsem(&ei->xattr_sem);
479 init_MUTEX(&ei->truncate_sem);
480 inode_init_once(&ei->vfs_inode);
484 static int init_inodecache(void)
486 ext3_inode_cachep = kmem_cache_create("ext3_inode_cache",
487 sizeof(struct ext3_inode_info),
488 0, SLAB_RECLAIM_ACCOUNT,
490 if (ext3_inode_cachep == NULL)
495 static void destroy_inodecache(void)
497 if (kmem_cache_destroy(ext3_inode_cachep))
498 printk(KERN_INFO "ext3_inode_cache: not all structures were freed\n");
501 static void ext3_clear_inode(struct inode *inode)
503 #ifdef CONFIG_EXT3_FS_POSIX_ACL
504 if (EXT3_I(inode)->i_acl &&
505 EXT3_I(inode)->i_acl != EXT3_ACL_NOT_CACHED) {
506 posix_acl_release(EXT3_I(inode)->i_acl);
507 EXT3_I(inode)->i_acl = EXT3_ACL_NOT_CACHED;
509 if (EXT3_I(inode)->i_default_acl &&
510 EXT3_I(inode)->i_default_acl != EXT3_ACL_NOT_CACHED) {
511 posix_acl_release(EXT3_I(inode)->i_default_acl);
512 EXT3_I(inode)->i_default_acl = EXT3_ACL_NOT_CACHED;
515 ext3_discard_reservation(inode);
520 #define QTYPE2NAME(t) ((t)==USRQUOTA?"user":"group")
521 #define QTYPE2MOPT(on, t) ((t)==USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA))
523 static int ext3_dquot_initialize(struct inode *inode, int type);
524 static int ext3_dquot_drop(struct inode *inode);
525 static int ext3_write_dquot(struct dquot *dquot);
526 static int ext3_acquire_dquot(struct dquot *dquot);
527 static int ext3_release_dquot(struct dquot *dquot);
528 static int ext3_mark_dquot_dirty(struct dquot *dquot);
529 static int ext3_write_info(struct super_block *sb, int type);
530 static int ext3_quota_on(struct super_block *sb, int type, int format_id, char *path);
531 static int ext3_quota_on_mount(struct super_block *sb, int type);
532 static int ext3_quota_off_mount(struct super_block *sb, int type);
534 static struct dquot_operations ext3_quota_operations = {
535 .initialize = ext3_dquot_initialize,
536 .drop = ext3_dquot_drop,
537 .alloc_space = dquot_alloc_space,
538 .alloc_inode = dquot_alloc_inode,
539 .free_space = dquot_free_space,
540 .free_inode = dquot_free_inode,
541 .transfer = dquot_transfer,
542 .write_dquot = ext3_write_dquot,
543 .acquire_dquot = ext3_acquire_dquot,
544 .release_dquot = ext3_release_dquot,
545 .mark_dirty = ext3_mark_dquot_dirty,
546 .write_info = ext3_write_info
549 static struct quotactl_ops ext3_qctl_operations = {
550 .quota_on = ext3_quota_on,
551 .quota_off = vfs_quota_off,
552 .quota_sync = vfs_quota_sync,
553 .get_info = vfs_get_dqinfo,
554 .set_info = vfs_set_dqinfo,
555 .get_dqblk = vfs_get_dqblk,
556 .set_dqblk = vfs_set_dqblk
560 static struct super_operations ext3_sops = {
561 .alloc_inode = ext3_alloc_inode,
562 .destroy_inode = ext3_destroy_inode,
563 .read_inode = ext3_read_inode,
564 .write_inode = ext3_write_inode,
565 .dirty_inode = ext3_dirty_inode,
566 .delete_inode = ext3_delete_inode,
567 .put_super = ext3_put_super,
568 .write_super = ext3_write_super,
569 .sync_fs = ext3_sync_fs,
570 .write_super_lockfs = ext3_write_super_lockfs,
571 .unlockfs = ext3_unlockfs,
572 .statfs = ext3_statfs,
573 .remount_fs = ext3_remount,
574 .clear_inode = ext3_clear_inode,
577 struct dentry *ext3_get_parent(struct dentry *child);
578 static struct export_operations ext3_export_ops = {
579 .get_parent = ext3_get_parent,
583 Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid,
584 Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro,
585 Opt_nouid32, Opt_check, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
586 Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
587 Opt_reservation, Opt_noreservation, Opt_noload,
588 Opt_commit, Opt_journal_update, Opt_journal_inum,
589 Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
590 Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
591 Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0,
592 Opt_tagxid, Opt_barrier, Opt_ignore, Opt_err, Opt_resize,
595 static match_table_t tokens = {
596 {Opt_bsd_df, "bsddf"},
597 {Opt_minix_df, "minixdf"},
598 {Opt_grpid, "grpid"},
599 {Opt_grpid, "bsdgroups"},
600 {Opt_nogrpid, "nogrpid"},
601 {Opt_nogrpid, "sysvgroups"},
602 {Opt_resgid, "resgid=%u"},
603 {Opt_resuid, "resuid=%u"},
605 {Opt_err_cont, "errors=continue"},
606 {Opt_err_panic, "errors=panic"},
607 {Opt_err_ro, "errors=remount-ro"},
608 {Opt_nouid32, "nouid32"},
609 {Opt_nocheck, "nocheck"},
610 {Opt_nocheck, "check=none"},
611 {Opt_check, "check"},
612 {Opt_debug, "debug"},
613 {Opt_oldalloc, "oldalloc"},
614 {Opt_orlov, "orlov"},
615 {Opt_user_xattr, "user_xattr"},
616 {Opt_nouser_xattr, "nouser_xattr"},
618 {Opt_noacl, "noacl"},
619 {Opt_reservation, "reservation"},
620 {Opt_noreservation, "noreservation"},
621 {Opt_noload, "noload"},
622 {Opt_commit, "commit=%u"},
623 {Opt_journal_update, "journal=update"},
624 {Opt_journal_inum, "journal=%u"},
625 {Opt_abort, "abort"},
626 {Opt_data_journal, "data=journal"},
627 {Opt_data_ordered, "data=ordered"},
628 {Opt_data_writeback, "data=writeback"},
629 {Opt_offusrjquota, "usrjquota="},
630 {Opt_usrjquota, "usrjquota=%s"},
631 {Opt_offgrpjquota, "grpjquota="},
632 {Opt_grpjquota, "grpjquota=%s"},
633 {Opt_jqfmt_vfsold, "jqfmt=vfsold"},
634 {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"},
635 {Opt_tagxid, "tagxid"},
636 {Opt_ignore, "grpquota"},
637 {Opt_ignore, "noquota"},
638 {Opt_ignore, "quota"},
639 {Opt_ignore, "usrquota"},
640 {Opt_barrier, "barrier=%u"},
642 {Opt_resize, "resize"},
645 static unsigned long get_sb_block(void **data)
647 unsigned long sb_block;
648 char *options = (char *) *data;
650 if (!options || strncmp(options, "sb=", 3) != 0)
651 return 1; /* Default location */
653 sb_block = simple_strtoul(options, &options, 0);
654 if (*options && *options != ',') {
655 printk("EXT3-fs: Invalid sb specification: %s\n",
661 *data = (void *) options;
665 static int parse_options (char * options, struct super_block *sb,
666 unsigned long * inum, unsigned long *n_blocks_count, int is_remount)
668 struct ext3_sb_info *sbi = EXT3_SB(sb);
670 substring_t args[MAX_OPT_ARGS];
680 while ((p = strsep (&options, ",")) != NULL) {
685 token = match_token(p, tokens, args);
688 clear_opt (sbi->s_mount_opt, MINIX_DF);
691 set_opt (sbi->s_mount_opt, MINIX_DF);
694 set_opt (sbi->s_mount_opt, GRPID);
697 clear_opt (sbi->s_mount_opt, GRPID);
700 if (match_int(&args[0], &option))
702 sbi->s_resuid = option;
705 if (match_int(&args[0], &option))
707 sbi->s_resgid = option;
710 /* handled by get_sb_block() instead of here */
711 /* *sb_block = match_int(&args[0]); */
714 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
715 clear_opt (sbi->s_mount_opt, ERRORS_RO);
716 set_opt (sbi->s_mount_opt, ERRORS_PANIC);
719 clear_opt (sbi->s_mount_opt, ERRORS_CONT);
720 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
721 set_opt (sbi->s_mount_opt, ERRORS_RO);
724 clear_opt (sbi->s_mount_opt, ERRORS_RO);
725 clear_opt (sbi->s_mount_opt, ERRORS_PANIC);
726 set_opt (sbi->s_mount_opt, ERRORS_CONT);
729 set_opt (sbi->s_mount_opt, NO_UID32);
731 #ifndef CONFIG_INOXID_NONE
734 printk(KERN_ERR "EXT3-fs: cannot specify "
735 "tagxid on remount\n");
738 set_opt (sbi->s_mount_opt, TAG_XID);
742 #ifdef CONFIG_EXT3_CHECK
743 set_opt (sbi->s_mount_opt, CHECK);
746 "EXT3 Check option not supported\n");
750 clear_opt (sbi->s_mount_opt, CHECK);
753 set_opt (sbi->s_mount_opt, DEBUG);
756 set_opt (sbi->s_mount_opt, OLDALLOC);
759 clear_opt (sbi->s_mount_opt, OLDALLOC);
761 #ifdef CONFIG_EXT3_FS_XATTR
763 set_opt (sbi->s_mount_opt, XATTR_USER);
765 case Opt_nouser_xattr:
766 clear_opt (sbi->s_mount_opt, XATTR_USER);
770 case Opt_nouser_xattr:
771 printk("EXT3 (no)user_xattr options not supported\n");
774 #ifdef CONFIG_EXT3_FS_POSIX_ACL
776 set_opt(sbi->s_mount_opt, POSIX_ACL);
779 clear_opt(sbi->s_mount_opt, POSIX_ACL);
784 printk("EXT3 (no)acl options not supported\n");
787 case Opt_reservation:
788 set_opt(sbi->s_mount_opt, RESERVATION);
790 case Opt_noreservation:
791 clear_opt(sbi->s_mount_opt, RESERVATION);
793 case Opt_journal_update:
795 /* Eventually we will want to be able to create
796 a journal file here. For now, only allow the
797 user to specify an existing inode to be the
800 printk(KERN_ERR "EXT3-fs: cannot specify "
801 "journal on remount\n");
804 set_opt (sbi->s_mount_opt, UPDATE_JOURNAL);
806 case Opt_journal_inum:
808 printk(KERN_ERR "EXT3-fs: cannot specify "
809 "journal on remount\n");
812 if (match_int(&args[0], &option))
817 set_opt (sbi->s_mount_opt, NOLOAD);
820 if (match_int(&args[0], &option))
825 option = JBD_DEFAULT_MAX_COMMIT_AGE;
826 sbi->s_commit_interval = HZ * option;
828 case Opt_data_journal:
829 data_opt = EXT3_MOUNT_JOURNAL_DATA;
831 case Opt_data_ordered:
832 data_opt = EXT3_MOUNT_ORDERED_DATA;
834 case Opt_data_writeback:
835 data_opt = EXT3_MOUNT_WRITEBACK_DATA;
838 if ((sbi->s_mount_opt & EXT3_MOUNT_DATA_FLAGS)
841 "EXT3-fs: cannot change data "
842 "mode on remount\n");
846 sbi->s_mount_opt &= ~EXT3_MOUNT_DATA_FLAGS;
847 sbi->s_mount_opt |= data_opt;
857 if (sb_any_quota_enabled(sb)) {
859 "EXT3-fs: Cannot change journalled "
860 "quota options when quota turned on.\n");
863 if (sbi->s_qf_names[qtype]) {
865 "EXT3-fs: %s quota file already "
866 "specified.\n", QTYPE2NAME(qtype));
869 sbi->s_qf_names[qtype] = match_strdup(&args[0]);
870 if (!sbi->s_qf_names[qtype]) {
872 "EXT3-fs: not enough memory for "
873 "storing quotafile name.\n");
876 if (strchr(sbi->s_qf_names[qtype], '/')) {
878 "EXT3-fs: quotafile must be on "
879 "filesystem root.\n");
880 kfree(sbi->s_qf_names[qtype]);
881 sbi->s_qf_names[qtype] = NULL;
885 case Opt_offusrjquota:
888 case Opt_offgrpjquota:
891 if (sb_any_quota_enabled(sb)) {
892 printk(KERN_ERR "EXT3-fs: Cannot change "
893 "journalled quota options when "
894 "quota turned on.\n");
897 if (sbi->s_qf_names[qtype]) {
898 kfree(sbi->s_qf_names[qtype]);
899 sbi->s_qf_names[qtype] = NULL;
902 case Opt_jqfmt_vfsold:
903 sbi->s_jquota_fmt = QFMT_VFS_OLD;
905 case Opt_jqfmt_vfsv0:
906 sbi->s_jquota_fmt = QFMT_VFS_V0;
911 case Opt_offusrjquota:
912 case Opt_offgrpjquota:
913 case Opt_jqfmt_vfsold:
914 case Opt_jqfmt_vfsv0:
916 "EXT3-fs: journalled quota options not "
921 set_opt(sbi->s_mount_opt, ABORT);
924 if (match_int(&args[0], &option))
927 set_opt(sbi->s_mount_opt, BARRIER);
929 clear_opt(sbi->s_mount_opt, BARRIER);
934 if (!n_blocks_count) {
935 printk("EXT3-fs: resize option only available "
939 match_int(&args[0], &option);
940 *n_blocks_count = option;
944 "EXT3-fs: Unrecognized mount option \"%s\" "
945 "or missing value\n", p);
950 if (!sbi->s_jquota_fmt && (sbi->s_qf_names[USRQUOTA] ||
951 sbi->s_qf_names[GRPQUOTA])) {
953 "EXT3-fs: journalled quota format not specified.\n");
961 static int ext3_setup_super(struct super_block *sb, struct ext3_super_block *es,
964 struct ext3_sb_info *sbi = EXT3_SB(sb);
967 if (le32_to_cpu(es->s_rev_level) > EXT3_MAX_SUPP_REV) {
968 printk (KERN_ERR "EXT3-fs warning: revision level too high, "
969 "forcing read-only mode\n");
974 if (!(sbi->s_mount_state & EXT3_VALID_FS))
975 printk (KERN_WARNING "EXT3-fs warning: mounting unchecked fs, "
976 "running e2fsck is recommended\n");
977 else if ((sbi->s_mount_state & EXT3_ERROR_FS))
979 "EXT3-fs warning: mounting fs with errors, "
980 "running e2fsck is recommended\n");
981 else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 &&
982 le16_to_cpu(es->s_mnt_count) >=
983 (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count))
985 "EXT3-fs warning: maximal mount count reached, "
986 "running e2fsck is recommended\n");
987 else if (le32_to_cpu(es->s_checkinterval) &&
988 (le32_to_cpu(es->s_lastcheck) +
989 le32_to_cpu(es->s_checkinterval) <= get_seconds()))
991 "EXT3-fs warning: checktime reached, "
992 "running e2fsck is recommended\n");
994 /* @@@ We _will_ want to clear the valid bit if we find
995 inconsistencies, to force a fsck at reboot. But for
996 a plain journaled filesystem we can keep it set as
998 es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & ~EXT3_VALID_FS);
1000 if (!(__s16) le16_to_cpu(es->s_max_mnt_count))
1001 es->s_max_mnt_count = cpu_to_le16(EXT3_DFL_MAX_MNT_COUNT);
1002 es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1);
1003 es->s_mtime = cpu_to_le32(get_seconds());
1004 ext3_update_dynamic_rev(sb);
1005 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1007 ext3_commit_super(sb, es, 1);
1008 if (test_opt(sb, DEBUG))
1009 printk(KERN_INFO "[EXT3 FS bs=%lu, gc=%lu, "
1010 "bpg=%lu, ipg=%lu, mo=%04lx]\n",
1012 sbi->s_groups_count,
1013 EXT3_BLOCKS_PER_GROUP(sb),
1014 EXT3_INODES_PER_GROUP(sb),
1017 printk(KERN_INFO "EXT3 FS on %s, ", sb->s_id);
1018 if (EXT3_SB(sb)->s_journal->j_inode == NULL) {
1019 char b[BDEVNAME_SIZE];
1021 printk("external journal on %s\n",
1022 bdevname(EXT3_SB(sb)->s_journal->j_dev, b));
1024 printk("internal journal\n");
1026 #ifdef CONFIG_EXT3_CHECK
1027 if (test_opt (sb, CHECK)) {
1028 ext3_check_blocks_bitmap (sb);
1029 ext3_check_inodes_bitmap (sb);
1035 /* Called at mount-time, super-block is locked */
1036 static int ext3_check_descriptors (struct super_block * sb)
1038 struct ext3_sb_info *sbi = EXT3_SB(sb);
1039 unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block);
1040 struct ext3_group_desc * gdp = NULL;
1044 ext3_debug ("Checking group descriptors");
1046 for (i = 0; i < sbi->s_groups_count; i++)
1048 if ((i % EXT3_DESC_PER_BLOCK(sb)) == 0)
1049 gdp = (struct ext3_group_desc *)
1050 sbi->s_group_desc[desc_block++]->b_data;
1051 if (le32_to_cpu(gdp->bg_block_bitmap) < block ||
1052 le32_to_cpu(gdp->bg_block_bitmap) >=
1053 block + EXT3_BLOCKS_PER_GROUP(sb))
1055 ext3_error (sb, "ext3_check_descriptors",
1056 "Block bitmap for group %d"
1057 " not in group (block %lu)!",
1059 le32_to_cpu(gdp->bg_block_bitmap));
1062 if (le32_to_cpu(gdp->bg_inode_bitmap) < block ||
1063 le32_to_cpu(gdp->bg_inode_bitmap) >=
1064 block + EXT3_BLOCKS_PER_GROUP(sb))
1066 ext3_error (sb, "ext3_check_descriptors",
1067 "Inode bitmap for group %d"
1068 " not in group (block %lu)!",
1070 le32_to_cpu(gdp->bg_inode_bitmap));
1073 if (le32_to_cpu(gdp->bg_inode_table) < block ||
1074 le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >=
1075 block + EXT3_BLOCKS_PER_GROUP(sb))
1077 ext3_error (sb, "ext3_check_descriptors",
1078 "Inode table for group %d"
1079 " not in group (block %lu)!",
1081 le32_to_cpu(gdp->bg_inode_table));
1084 block += EXT3_BLOCKS_PER_GROUP(sb);
1088 sbi->s_es->s_free_blocks_count=cpu_to_le32(ext3_count_free_blocks(sb));
1089 sbi->s_es->s_free_inodes_count=cpu_to_le32(ext3_count_free_inodes(sb));
1094 /* ext3_orphan_cleanup() walks a singly-linked list of inodes (starting at
1095 * the superblock) which were deleted from all directories, but held open by
1096 * a process at the time of a crash. We walk the list and try to delete these
1097 * inodes at recovery time (only with a read-write filesystem).
1099 * In order to keep the orphan inode chain consistent during traversal (in
1100 * case of crash during recovery), we link each inode into the superblock
1101 * orphan list_head and handle it the same way as an inode deletion during
1102 * normal operation (which journals the operations for us).
1104 * We only do an iget() and an iput() on each inode, which is very safe if we
1105 * accidentally point at an in-use or already deleted inode. The worst that
1106 * can happen in this case is that we get a "bit already cleared" message from
1107 * ext3_free_inode(). The only reason we would point at a wrong inode is if
1108 * e2fsck was run on this filesystem, and it must have already done the orphan
1109 * inode cleanup for us, so we can safely abort without any further action.
1111 static void ext3_orphan_cleanup (struct super_block * sb,
1112 struct ext3_super_block * es)
1114 unsigned int s_flags = sb->s_flags;
1115 int nr_orphans = 0, nr_truncates = 0;
1119 if (!es->s_last_orphan) {
1120 jbd_debug(4, "no orphan inodes to clean up\n");
1124 if (EXT3_SB(sb)->s_mount_state & EXT3_ERROR_FS) {
1125 if (es->s_last_orphan)
1126 jbd_debug(1, "Errors on filesystem, "
1127 "clearing orphan list.\n");
1128 es->s_last_orphan = 0;
1129 jbd_debug(1, "Skipping orphan recovery on fs with errors.\n");
1133 if (s_flags & MS_RDONLY) {
1134 printk(KERN_INFO "EXT3-fs: %s: orphan cleanup on readonly fs\n",
1136 sb->s_flags &= ~MS_RDONLY;
1139 /* Needed for iput() to work correctly and not trash data */
1140 sb->s_flags |= MS_ACTIVE;
1141 /* Turn on quotas so that they are updated correctly */
1142 for (i = 0; i < MAXQUOTAS; i++) {
1143 if (EXT3_SB(sb)->s_qf_names[i]) {
1144 int ret = ext3_quota_on_mount(sb, i);
1147 "EXT3-fs: Cannot turn on journalled "
1148 "quota: error %d\n", ret);
1153 while (es->s_last_orphan) {
1154 struct inode *inode;
1157 ext3_orphan_get(sb, le32_to_cpu(es->s_last_orphan)))) {
1158 es->s_last_orphan = 0;
1162 list_add(&EXT3_I(inode)->i_orphan, &EXT3_SB(sb)->s_orphan);
1164 if (inode->i_nlink) {
1166 "%s: truncating inode %ld to %Ld bytes\n",
1167 __FUNCTION__, inode->i_ino, inode->i_size);
1168 jbd_debug(2, "truncating inode %ld to %Ld bytes\n",
1169 inode->i_ino, inode->i_size);
1170 ext3_truncate(inode);
1174 "%s: deleting unreferenced inode %ld\n",
1175 __FUNCTION__, inode->i_ino);
1176 jbd_debug(2, "deleting unreferenced inode %ld\n",
1180 iput(inode); /* The delete magic happens here! */
1183 #define PLURAL(x) (x), ((x)==1) ? "" : "s"
1186 printk(KERN_INFO "EXT3-fs: %s: %d orphan inode%s deleted\n",
1187 sb->s_id, PLURAL(nr_orphans));
1189 printk(KERN_INFO "EXT3-fs: %s: %d truncate%s cleaned up\n",
1190 sb->s_id, PLURAL(nr_truncates));
1192 /* Turn quotas off */
1193 for (i = 0; i < MAXQUOTAS; i++) {
1194 if (sb_dqopt(sb)->files[i])
1195 ext3_quota_off_mount(sb, i);
1198 sb->s_flags = s_flags; /* Restore MS_RDONLY status */
1201 #define log2(n) ffz(~(n))
1204 * Maximal file size. There is a direct, and {,double-,triple-}indirect
1205 * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks.
1206 * We need to be 1 filesystem block less than the 2^32 sector limit.
1208 static loff_t ext3_max_size(int bits)
1210 loff_t res = EXT3_NDIR_BLOCKS;
1211 res += 1LL << (bits-2);
1212 res += 1LL << (2*(bits-2));
1213 res += 1LL << (3*(bits-2));
1215 if (res > (512LL << 32) - (1 << bits))
1216 res = (512LL << 32) - (1 << bits);
1220 static unsigned long descriptor_loc(struct super_block *sb,
1221 unsigned long logic_sb_block,
1224 struct ext3_sb_info *sbi = EXT3_SB(sb);
1225 unsigned long bg, first_data_block, first_meta_bg;
1228 first_data_block = le32_to_cpu(sbi->s_es->s_first_data_block);
1229 first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg);
1231 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_META_BG) ||
1233 return (logic_sb_block + nr + 1);
1234 bg = sbi->s_desc_per_block * nr;
1235 if (ext3_bg_has_super(sb, bg))
1237 return (first_data_block + has_super + (bg * sbi->s_blocks_per_group));
1241 static int ext3_fill_super (struct super_block *sb, void *data, int silent)
1243 struct buffer_head * bh;
1244 struct ext3_super_block *es = NULL;
1245 struct ext3_sb_info *sbi;
1246 unsigned long block;
1247 unsigned long sb_block = get_sb_block(&data);
1248 unsigned long logic_sb_block;
1249 unsigned long offset = 0;
1250 unsigned long journal_inum = 0;
1251 unsigned long def_mount_opts;
1260 sbi = kmalloc(sizeof(*sbi), GFP_KERNEL);
1263 sb->s_fs_info = sbi;
1264 memset(sbi, 0, sizeof(*sbi));
1265 sbi->s_mount_opt = 0;
1266 sbi->s_resuid = EXT3_DEF_RESUID;
1267 sbi->s_resgid = EXT3_DEF_RESGID;
1269 blocksize = sb_min_blocksize(sb, EXT3_MIN_BLOCK_SIZE);
1271 printk(KERN_ERR "EXT3-fs: unable to set blocksize\n");
1276 * The ext3 superblock will not be buffer aligned for other than 1kB
1277 * block sizes. We need to calculate the offset from buffer start.
1279 if (blocksize != EXT3_MIN_BLOCK_SIZE) {
1280 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1281 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1283 logic_sb_block = sb_block;
1286 if (!(bh = sb_bread(sb, logic_sb_block))) {
1287 printk (KERN_ERR "EXT3-fs: unable to read superblock\n");
1291 * Note: s_es must be initialized as soon as possible because
1292 * some ext3 macro-instructions depend on its value
1294 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1296 sb->s_magic = le16_to_cpu(es->s_magic);
1297 if (sb->s_magic != EXT3_SUPER_MAGIC)
1300 /* Set defaults before we parse the mount options */
1301 def_mount_opts = le32_to_cpu(es->s_default_mount_opts);
1302 if (def_mount_opts & EXT3_DEFM_DEBUG)
1303 set_opt(sbi->s_mount_opt, DEBUG);
1304 if (def_mount_opts & EXT3_DEFM_BSDGROUPS)
1305 set_opt(sbi->s_mount_opt, GRPID);
1306 if (def_mount_opts & EXT3_DEFM_UID16)
1307 set_opt(sbi->s_mount_opt, NO_UID32);
1308 if (def_mount_opts & EXT3_DEFM_XATTR_USER)
1309 set_opt(sbi->s_mount_opt, XATTR_USER);
1310 if (def_mount_opts & EXT3_DEFM_ACL)
1311 set_opt(sbi->s_mount_opt, POSIX_ACL);
1312 if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_DATA)
1313 sbi->s_mount_opt |= EXT3_MOUNT_JOURNAL_DATA;
1314 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_ORDERED)
1315 sbi->s_mount_opt |= EXT3_MOUNT_ORDERED_DATA;
1316 else if ((def_mount_opts & EXT3_DEFM_JMODE) == EXT3_DEFM_JMODE_WBACK)
1317 sbi->s_mount_opt |= EXT3_MOUNT_WRITEBACK_DATA;
1319 if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_PANIC)
1320 set_opt(sbi->s_mount_opt, ERRORS_PANIC);
1321 else if (le16_to_cpu(sbi->s_es->s_errors) == EXT3_ERRORS_RO)
1322 set_opt(sbi->s_mount_opt, ERRORS_RO);
1324 sbi->s_resuid = le16_to_cpu(es->s_def_resuid);
1325 sbi->s_resgid = le16_to_cpu(es->s_def_resgid);
1327 set_opt(sbi->s_mount_opt, RESERVATION);
1329 if (!parse_options ((char *) data, sb, &journal_inum, NULL, 0))
1332 if (EXT3_SB(sb)->s_mount_opt & EXT3_MOUNT_TAG_XID)
1333 sb->s_flags |= MS_TAGXID;
1334 sb->s_flags |= MS_ONE_SECOND;
1335 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
1336 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
1338 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV &&
1339 (EXT3_HAS_COMPAT_FEATURE(sb, ~0U) ||
1340 EXT3_HAS_RO_COMPAT_FEATURE(sb, ~0U) ||
1341 EXT3_HAS_INCOMPAT_FEATURE(sb, ~0U)))
1343 "EXT3-fs warning: feature flags set on rev 0 fs, "
1344 "running e2fsck is recommended\n");
1346 * Check feature flags regardless of the revision level, since we
1347 * previously didn't change the revision level when setting the flags,
1348 * so there is a chance incompat flags are set on a rev 0 filesystem.
1350 features = EXT3_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP);
1352 printk(KERN_ERR "EXT3-fs: %s: couldn't mount because of "
1353 "unsupported optional features (%x).\n",
1354 sb->s_id, le32_to_cpu(features));
1357 features = EXT3_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP);
1358 if (!(sb->s_flags & MS_RDONLY) && features) {
1359 printk(KERN_ERR "EXT3-fs: %s: couldn't mount RDWR because of "
1360 "unsupported optional features (%x).\n",
1361 sb->s_id, le32_to_cpu(features));
1364 blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size);
1366 if (blocksize < EXT3_MIN_BLOCK_SIZE ||
1367 blocksize > EXT3_MAX_BLOCK_SIZE) {
1369 "EXT3-fs: Unsupported filesystem blocksize %d on %s.\n",
1370 blocksize, sb->s_id);
1374 hblock = bdev_hardsect_size(sb->s_bdev);
1375 if (sb->s_blocksize != blocksize) {
1377 * Make sure the blocksize for the filesystem is larger
1378 * than the hardware sectorsize for the machine.
1380 if (blocksize < hblock) {
1381 printk(KERN_ERR "EXT3-fs: blocksize %d too small for "
1382 "device blocksize %d.\n", blocksize, hblock);
1387 sb_set_blocksize(sb, blocksize);
1388 logic_sb_block = (sb_block * EXT3_MIN_BLOCK_SIZE) / blocksize;
1389 offset = (sb_block * EXT3_MIN_BLOCK_SIZE) % blocksize;
1390 bh = sb_bread(sb, logic_sb_block);
1393 "EXT3-fs: Can't read superblock on 2nd try.\n");
1396 es = (struct ext3_super_block *)(((char *)bh->b_data) + offset);
1398 if (es->s_magic != cpu_to_le16(EXT3_SUPER_MAGIC)) {
1400 "EXT3-fs: Magic mismatch, very weird !\n");
1405 sb->s_maxbytes = ext3_max_size(sb->s_blocksize_bits);
1407 if (le32_to_cpu(es->s_rev_level) == EXT3_GOOD_OLD_REV) {
1408 sbi->s_inode_size = EXT3_GOOD_OLD_INODE_SIZE;
1409 sbi->s_first_ino = EXT3_GOOD_OLD_FIRST_INO;
1411 sbi->s_inode_size = le16_to_cpu(es->s_inode_size);
1412 sbi->s_first_ino = le32_to_cpu(es->s_first_ino);
1413 if ((sbi->s_inode_size < EXT3_GOOD_OLD_INODE_SIZE) ||
1414 (sbi->s_inode_size & (sbi->s_inode_size - 1)) ||
1415 (sbi->s_inode_size > blocksize)) {
1417 "EXT3-fs: unsupported inode size: %d\n",
1422 sbi->s_frag_size = EXT3_MIN_FRAG_SIZE <<
1423 le32_to_cpu(es->s_log_frag_size);
1424 if (blocksize != sbi->s_frag_size) {
1426 "EXT3-fs: fragsize %lu != blocksize %u (unsupported)\n",
1427 sbi->s_frag_size, blocksize);
1430 sbi->s_frags_per_block = 1;
1431 sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group);
1432 sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
1433 sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
1434 if (EXT3_INODE_SIZE(sb) == 0)
1436 sbi->s_inodes_per_block = blocksize / EXT3_INODE_SIZE(sb);
1437 if (sbi->s_inodes_per_block == 0)
1439 sbi->s_itb_per_group = sbi->s_inodes_per_group /
1440 sbi->s_inodes_per_block;
1441 sbi->s_desc_per_block = blocksize / sizeof(struct ext3_group_desc);
1443 sbi->s_mount_state = le16_to_cpu(es->s_state);
1444 sbi->s_addr_per_block_bits = log2(EXT3_ADDR_PER_BLOCK(sb));
1445 sbi->s_desc_per_block_bits = log2(EXT3_DESC_PER_BLOCK(sb));
1446 for (i=0; i < 4; i++)
1447 sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]);
1448 sbi->s_def_hash_version = es->s_def_hash_version;
1450 if (sbi->s_blocks_per_group > blocksize * 8) {
1452 "EXT3-fs: #blocks per group too big: %lu\n",
1453 sbi->s_blocks_per_group);
1456 if (sbi->s_frags_per_group > blocksize * 8) {
1458 "EXT3-fs: #fragments per group too big: %lu\n",
1459 sbi->s_frags_per_group);
1462 if (sbi->s_inodes_per_group > blocksize * 8) {
1464 "EXT3-fs: #inodes per group too big: %lu\n",
1465 sbi->s_inodes_per_group);
1469 if (EXT3_BLOCKS_PER_GROUP(sb) == 0)
1471 sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) -
1472 le32_to_cpu(es->s_first_data_block) +
1473 EXT3_BLOCKS_PER_GROUP(sb) - 1) /
1474 EXT3_BLOCKS_PER_GROUP(sb);
1475 db_count = (sbi->s_groups_count + EXT3_DESC_PER_BLOCK(sb) - 1) /
1476 EXT3_DESC_PER_BLOCK(sb);
1477 sbi->s_group_desc = kmalloc(db_count * sizeof (struct buffer_head *),
1479 if (sbi->s_group_desc == NULL) {
1480 printk (KERN_ERR "EXT3-fs: not enough memory\n");
1484 percpu_counter_init(&sbi->s_freeblocks_counter);
1485 percpu_counter_init(&sbi->s_freeinodes_counter);
1486 percpu_counter_init(&sbi->s_dirs_counter);
1487 bgl_lock_init(&sbi->s_blockgroup_lock);
1489 for (i = 0; i < db_count; i++) {
1490 block = descriptor_loc(sb, logic_sb_block, i);
1491 sbi->s_group_desc[i] = sb_bread(sb, block);
1492 if (!sbi->s_group_desc[i]) {
1493 printk (KERN_ERR "EXT3-fs: "
1494 "can't read group descriptor %d\n", i);
1499 if (!ext3_check_descriptors (sb)) {
1500 printk (KERN_ERR "EXT3-fs: group descriptors corrupted !\n");
1503 sbi->s_gdb_count = db_count;
1504 get_random_bytes(&sbi->s_next_generation, sizeof(u32));
1505 spin_lock_init(&sbi->s_next_gen_lock);
1506 /* per fileystem reservation list head & lock */
1507 spin_lock_init(&sbi->s_rsv_window_lock);
1508 sbi->s_rsv_window_root = RB_ROOT;
1509 /* Add a single, static dummy reservation to the start of the
1510 * reservation window list --- it gives us a placeholder for
1511 * append-at-start-of-list which makes the allocation logic
1512 * _much_ simpler. */
1513 sbi->s_rsv_window_head.rsv_start = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1514 sbi->s_rsv_window_head.rsv_end = EXT3_RESERVE_WINDOW_NOT_ALLOCATED;
1515 atomic_set(&sbi->s_rsv_window_head.rsv_alloc_hit, 0);
1516 atomic_set(&sbi->s_rsv_window_head.rsv_goal_size, 0);
1517 ext3_rsv_window_add(sb, &sbi->s_rsv_window_head);
1520 * set up enough so that it can read an inode
1522 sb->s_op = &ext3_sops;
1523 sb->s_export_op = &ext3_export_ops;
1524 sb->s_xattr = ext3_xattr_handlers;
1526 sb->s_qcop = &ext3_qctl_operations;
1527 sb->dq_op = &ext3_quota_operations;
1529 INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
1533 needs_recovery = (es->s_last_orphan != 0 ||
1534 EXT3_HAS_INCOMPAT_FEATURE(sb,
1535 EXT3_FEATURE_INCOMPAT_RECOVER));
1538 * The first inode we look at is the journal inode. Don't try
1539 * root first: it may be modified in the journal!
1541 if (!test_opt(sb, NOLOAD) &&
1542 EXT3_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
1543 if (ext3_load_journal(sb, es))
1545 } else if (journal_inum) {
1546 if (ext3_create_journal(sb, es, journal_inum))
1551 "ext3: No journal on filesystem on %s\n",
1556 /* We have now updated the journal if required, so we can
1557 * validate the data journaling mode. */
1558 switch (test_opt(sb, DATA_FLAGS)) {
1560 /* No mode set, assume a default based on the journal
1561 capabilities: ORDERED_DATA if the journal can
1562 cope, else JOURNAL_DATA */
1563 if (journal_check_available_features
1564 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE))
1565 set_opt(sbi->s_mount_opt, ORDERED_DATA);
1567 set_opt(sbi->s_mount_opt, JOURNAL_DATA);
1570 case EXT3_MOUNT_ORDERED_DATA:
1571 case EXT3_MOUNT_WRITEBACK_DATA:
1572 if (!journal_check_available_features
1573 (sbi->s_journal, 0, 0, JFS_FEATURE_INCOMPAT_REVOKE)) {
1574 printk(KERN_ERR "EXT3-fs: Journal does not support "
1575 "requested data journaling mode\n");
1583 * The journal_load will have done any necessary log recovery,
1584 * so we can safely mount the rest of the filesystem now.
1587 root = iget(sb, EXT3_ROOT_INO);
1588 sb->s_root = d_alloc_root(root);
1590 printk(KERN_ERR "EXT3-fs: get root inode failed\n");
1594 if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) {
1597 printk(KERN_ERR "EXT3-fs: corrupt root inode, run e2fsck\n");
1601 ext3_setup_super (sb, es, sb->s_flags & MS_RDONLY);
1603 * akpm: core read_super() calls in here with the superblock locked.
1604 * That deadlocks, because orphan cleanup needs to lock the superblock
1605 * in numerous places. Here we just pop the lock - it's relatively
1606 * harmless, because we are now ready to accept write_super() requests,
1607 * and aviro says that's the only reason for hanging onto the
1610 EXT3_SB(sb)->s_mount_state |= EXT3_ORPHAN_FS;
1611 ext3_orphan_cleanup(sb, es);
1612 EXT3_SB(sb)->s_mount_state &= ~EXT3_ORPHAN_FS;
1614 printk (KERN_INFO "EXT3-fs: recovery complete.\n");
1615 ext3_mark_recovery_complete(sb, es);
1616 printk (KERN_INFO "EXT3-fs: mounted filesystem with %s data mode.\n",
1617 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_JOURNAL_DATA ? "journal":
1618 test_opt(sb,DATA_FLAGS) == EXT3_MOUNT_ORDERED_DATA ? "ordered":
1621 percpu_counter_mod(&sbi->s_freeblocks_counter,
1622 ext3_count_free_blocks(sb));
1623 percpu_counter_mod(&sbi->s_freeinodes_counter,
1624 ext3_count_free_inodes(sb));
1625 percpu_counter_mod(&sbi->s_dirs_counter,
1626 ext3_count_dirs(sb));
1632 printk(KERN_ERR "VFS: Can't find ext3 filesystem on dev %s.\n",
1637 journal_destroy(sbi->s_journal);
1639 for (i = 0; i < db_count; i++)
1640 brelse(sbi->s_group_desc[i]);
1641 kfree(sbi->s_group_desc);
1644 for (i = 0; i < MAXQUOTAS; i++)
1645 kfree(sbi->s_qf_names[i]);
1647 ext3_blkdev_remove(sbi);
1650 sb->s_fs_info = NULL;
1656 * Setup any per-fs journal parameters now. We'll do this both on
1657 * initial mount, once the journal has been initialised but before we've
1658 * done any recovery; and again on any subsequent remount.
1660 static void ext3_init_journal_params(struct super_block *sb, journal_t *journal)
1662 struct ext3_sb_info *sbi = EXT3_SB(sb);
1664 if (sbi->s_commit_interval)
1665 journal->j_commit_interval = sbi->s_commit_interval;
1666 /* We could also set up an ext3-specific default for the commit
1667 * interval here, but for now we'll just fall back to the jbd
1670 spin_lock(&journal->j_state_lock);
1671 if (test_opt(sb, BARRIER))
1672 journal->j_flags |= JFS_BARRIER;
1674 journal->j_flags &= ~JFS_BARRIER;
1675 spin_unlock(&journal->j_state_lock);
1678 static journal_t *ext3_get_journal(struct super_block *sb, int journal_inum)
1680 struct inode *journal_inode;
1683 /* First, test for the existence of a valid inode on disk. Bad
1684 * things happen if we iget() an unused inode, as the subsequent
1685 * iput() will try to delete it. */
1687 journal_inode = iget(sb, journal_inum);
1688 if (!journal_inode) {
1689 printk(KERN_ERR "EXT3-fs: no journal found.\n");
1692 if (!journal_inode->i_nlink) {
1693 make_bad_inode(journal_inode);
1694 iput(journal_inode);
1695 printk(KERN_ERR "EXT3-fs: journal inode is deleted.\n");
1699 jbd_debug(2, "Journal inode found at %p: %Ld bytes\n",
1700 journal_inode, journal_inode->i_size);
1701 if (is_bad_inode(journal_inode) || !S_ISREG(journal_inode->i_mode)) {
1702 printk(KERN_ERR "EXT3-fs: invalid journal inode.\n");
1703 iput(journal_inode);
1707 journal = journal_init_inode(journal_inode);
1709 printk(KERN_ERR "EXT3-fs: Could not load journal inode\n");
1710 iput(journal_inode);
1713 journal->j_private = sb;
1714 ext3_init_journal_params(sb, journal);
1718 static journal_t *ext3_get_dev_journal(struct super_block *sb,
1721 struct buffer_head * bh;
1725 int hblock, blocksize;
1726 unsigned long sb_block;
1727 unsigned long offset;
1728 struct ext3_super_block * es;
1729 struct block_device *bdev;
1731 bdev = ext3_blkdev_get(j_dev);
1735 if (bd_claim(bdev, sb)) {
1737 "EXT3: failed to claim external journal device.\n");
1742 blocksize = sb->s_blocksize;
1743 hblock = bdev_hardsect_size(bdev);
1744 if (blocksize < hblock) {
1746 "EXT3-fs: blocksize too small for journal device.\n");
1750 sb_block = EXT3_MIN_BLOCK_SIZE / blocksize;
1751 offset = EXT3_MIN_BLOCK_SIZE % blocksize;
1752 set_blocksize(bdev, blocksize);
1753 if (!(bh = __bread(bdev, sb_block, blocksize))) {
1754 printk(KERN_ERR "EXT3-fs: couldn't read superblock of "
1755 "external journal\n");
1759 es = (struct ext3_super_block *) (((char *)bh->b_data) + offset);
1760 if ((le16_to_cpu(es->s_magic) != EXT3_SUPER_MAGIC) ||
1761 !(le32_to_cpu(es->s_feature_incompat) &
1762 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
1763 printk(KERN_ERR "EXT3-fs: external journal has "
1764 "bad superblock\n");
1769 if (memcmp(EXT3_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) {
1770 printk(KERN_ERR "EXT3-fs: journal UUID does not match\n");
1775 len = le32_to_cpu(es->s_blocks_count);
1776 start = sb_block + 1;
1777 brelse(bh); /* we're done with the superblock */
1779 journal = journal_init_dev(bdev, sb->s_bdev,
1780 start, len, blocksize);
1782 printk(KERN_ERR "EXT3-fs: failed to create device journal\n");
1785 journal->j_private = sb;
1786 ll_rw_block(READ, 1, &journal->j_sb_buffer);
1787 wait_on_buffer(journal->j_sb_buffer);
1788 if (!buffer_uptodate(journal->j_sb_buffer)) {
1789 printk(KERN_ERR "EXT3-fs: I/O error on journal device\n");
1792 if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) {
1793 printk(KERN_ERR "EXT3-fs: External journal has more than one "
1794 "user (unsupported) - %d\n",
1795 be32_to_cpu(journal->j_superblock->s_nr_users));
1798 EXT3_SB(sb)->journal_bdev = bdev;
1799 ext3_init_journal_params(sb, journal);
1802 journal_destroy(journal);
1804 ext3_blkdev_put(bdev);
1808 static int ext3_load_journal(struct super_block * sb,
1809 struct ext3_super_block * es)
1812 int journal_inum = le32_to_cpu(es->s_journal_inum);
1813 dev_t journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
1815 int really_read_only;
1817 really_read_only = bdev_read_only(sb->s_bdev);
1820 * Are we loading a blank journal or performing recovery after a
1821 * crash? For recovery, we need to check in advance whether we
1822 * can get read-write access to the device.
1825 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER)) {
1826 if (sb->s_flags & MS_RDONLY) {
1827 printk(KERN_INFO "EXT3-fs: INFO: recovery "
1828 "required on readonly filesystem.\n");
1829 if (really_read_only) {
1830 printk(KERN_ERR "EXT3-fs: write access "
1831 "unavailable, cannot proceed.\n");
1834 printk (KERN_INFO "EXT3-fs: write access will "
1835 "be enabled during recovery.\n");
1839 if (journal_inum && journal_dev) {
1840 printk(KERN_ERR "EXT3-fs: filesystem has both journal "
1841 "and inode journals!\n");
1846 if (!(journal = ext3_get_journal(sb, journal_inum)))
1849 if (!(journal = ext3_get_dev_journal(sb, journal_dev)))
1853 if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) {
1854 err = journal_update_format(journal);
1856 printk(KERN_ERR "EXT3-fs: error updating journal.\n");
1857 journal_destroy(journal);
1862 if (!EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER))
1863 err = journal_wipe(journal, !really_read_only);
1865 err = journal_load(journal);
1868 printk(KERN_ERR "EXT3-fs: error loading journal.\n");
1869 journal_destroy(journal);
1873 EXT3_SB(sb)->s_journal = journal;
1874 ext3_clear_journal_err(sb, es);
1878 static int ext3_create_journal(struct super_block * sb,
1879 struct ext3_super_block * es,
1884 if (sb->s_flags & MS_RDONLY) {
1885 printk(KERN_ERR "EXT3-fs: readonly filesystem when trying to "
1886 "create journal.\n");
1890 if (!(journal = ext3_get_journal(sb, journal_inum)))
1893 printk(KERN_INFO "EXT3-fs: creating new journal on inode %d\n",
1896 if (journal_create(journal)) {
1897 printk(KERN_ERR "EXT3-fs: error creating journal.\n");
1898 journal_destroy(journal);
1902 EXT3_SB(sb)->s_journal = journal;
1904 ext3_update_dynamic_rev(sb);
1905 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1906 EXT3_SET_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL);
1908 es->s_journal_inum = cpu_to_le32(journal_inum);
1911 /* Make sure we flush the recovery flag to disk. */
1912 ext3_commit_super(sb, es, 1);
1917 static void ext3_commit_super (struct super_block * sb,
1918 struct ext3_super_block * es,
1921 struct buffer_head *sbh = EXT3_SB(sb)->s_sbh;
1925 es->s_wtime = cpu_to_le32(get_seconds());
1926 es->s_free_blocks_count = cpu_to_le32(ext3_count_free_blocks(sb));
1927 es->s_free_inodes_count = cpu_to_le32(ext3_count_free_inodes(sb));
1928 BUFFER_TRACE(sbh, "marking dirty");
1929 mark_buffer_dirty(sbh);
1931 sync_dirty_buffer(sbh);
1936 * Have we just finished recovery? If so, and if we are mounting (or
1937 * remounting) the filesystem readonly, then we will end up with a
1938 * consistent fs on disk. Record that fact.
1940 static void ext3_mark_recovery_complete(struct super_block * sb,
1941 struct ext3_super_block * es)
1943 journal_t *journal = EXT3_SB(sb)->s_journal;
1945 journal_lock_updates(journal);
1946 journal_flush(journal);
1947 if (EXT3_HAS_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER) &&
1948 sb->s_flags & MS_RDONLY) {
1949 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
1951 ext3_commit_super(sb, es, 1);
1953 journal_unlock_updates(journal);
1957 * If we are mounting (or read-write remounting) a filesystem whose journal
1958 * has recorded an error from a previous lifetime, move that error to the
1959 * main filesystem now.
1961 static void ext3_clear_journal_err(struct super_block * sb,
1962 struct ext3_super_block * es)
1968 journal = EXT3_SB(sb)->s_journal;
1971 * Now check for any error status which may have been recorded in the
1972 * journal by a prior ext3_error() or ext3_abort()
1975 j_errno = journal_errno(journal);
1979 errstr = ext3_decode_error(sb, j_errno, nbuf);
1980 ext3_warning(sb, __FUNCTION__, "Filesystem error recorded "
1981 "from previous mount: %s", errstr);
1982 ext3_warning(sb, __FUNCTION__, "Marking fs in need of "
1983 "filesystem check.");
1985 EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
1986 es->s_state |= cpu_to_le16(EXT3_ERROR_FS);
1987 ext3_commit_super (sb, es, 1);
1989 journal_clear_err(journal);
1994 * Force the running and committing transactions to commit,
1995 * and wait on the commit.
1997 int ext3_force_commit(struct super_block *sb)
2002 if (sb->s_flags & MS_RDONLY)
2005 journal = EXT3_SB(sb)->s_journal;
2007 ret = ext3_journal_force_commit(journal);
2012 * Ext3 always journals updates to the superblock itself, so we don't
2013 * have to propagate any other updates to the superblock on disk at this
2014 * point. Just start an async writeback to get the buffers on their way
2017 * This implicitly triggers the writebehind on sync().
2020 void ext3_write_super (struct super_block * sb)
2022 if (down_trylock(&sb->s_lock) == 0)
2027 static int ext3_sync_fs(struct super_block *sb, int wait)
2032 if (journal_start_commit(EXT3_SB(sb)->s_journal, &target)) {
2034 log_wait_commit(EXT3_SB(sb)->s_journal, target);
2040 * LVM calls this function before a (read-only) snapshot is created. This
2041 * gives us a chance to flush the journal completely and mark the fs clean.
2043 void ext3_write_super_lockfs(struct super_block *sb)
2047 if (!(sb->s_flags & MS_RDONLY)) {
2048 journal_t *journal = EXT3_SB(sb)->s_journal;
2050 /* Now we set up the journal barrier. */
2051 journal_lock_updates(journal);
2052 journal_flush(journal);
2054 /* Journal blocked and flushed, clear needs_recovery flag. */
2055 EXT3_CLEAR_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2056 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2061 * Called by LVM after the snapshot is done. We need to reset the RECOVER
2062 * flag here, even though the filesystem is not technically dirty yet.
2064 void ext3_unlockfs(struct super_block *sb)
2066 if (!(sb->s_flags & MS_RDONLY)) {
2068 /* Reser the needs_recovery flag before the fs is unlocked. */
2069 EXT3_SET_INCOMPAT_FEATURE(sb, EXT3_FEATURE_INCOMPAT_RECOVER);
2070 ext3_commit_super(sb, EXT3_SB(sb)->s_es, 1);
2072 journal_unlock_updates(EXT3_SB(sb)->s_journal);
2076 int ext3_remount (struct super_block * sb, int * flags, char * data)
2078 struct ext3_super_block * es;
2079 struct ext3_sb_info *sbi = EXT3_SB(sb);
2081 unsigned long n_blocks_count = 0;
2084 * Allow the "check" option to be passed as a remount option.
2086 if (!parse_options(data, sb, &tmp, &n_blocks_count, 1))
2089 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2090 ext3_abort(sb, __FUNCTION__, "Abort forced by user");
2092 sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
2093 ((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
2097 ext3_init_journal_params(sb, sbi->s_journal);
2099 if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) ||
2100 n_blocks_count > le32_to_cpu(es->s_blocks_count)) {
2101 if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
2104 if (*flags & MS_RDONLY) {
2106 * First of all, the unconditional stuff we have to do
2107 * to disable replay of the journal when we next remount
2109 sb->s_flags |= MS_RDONLY;
2112 * OK, test if we are remounting a valid rw partition
2113 * readonly, and if so set the rdonly flag and then
2114 * mark the partition as valid again.
2116 if (!(es->s_state & cpu_to_le16(EXT3_VALID_FS)) &&
2117 (sbi->s_mount_state & EXT3_VALID_FS))
2118 es->s_state = cpu_to_le16(sbi->s_mount_state);
2120 ext3_mark_recovery_complete(sb, es);
2123 if ((ret = EXT3_HAS_RO_COMPAT_FEATURE(sb,
2124 ~EXT3_FEATURE_RO_COMPAT_SUPP))) {
2125 printk(KERN_WARNING "EXT3-fs: %s: couldn't "
2126 "remount RDWR because of unsupported "
2127 "optional features (%x).\n",
2128 sb->s_id, le32_to_cpu(ret));
2132 * Mounting a RDONLY partition read-write, so reread
2133 * and store the current valid flag. (It may have
2134 * been changed by e2fsck since we originally mounted
2137 ext3_clear_journal_err(sb, es);
2138 sbi->s_mount_state = le16_to_cpu(es->s_state);
2139 if ((ret = ext3_group_extend(sb, es, n_blocks_count)))
2141 if (!ext3_setup_super (sb, es, 0))
2142 sb->s_flags &= ~MS_RDONLY;
2148 int ext3_statfs (struct super_block * sb, struct kstatfs * buf)
2150 struct ext3_super_block *es = EXT3_SB(sb)->s_es;
2151 unsigned long overhead;
2154 if (test_opt (sb, MINIX_DF))
2157 unsigned long ngroups;
2158 ngroups = EXT3_SB(sb)->s_groups_count;
2162 * Compute the overhead (FS structures)
2166 * All of the blocks before first_data_block are
2169 overhead = le32_to_cpu(es->s_first_data_block);
2172 * Add the overhead attributed to the superblock and
2173 * block group descriptors. If the sparse superblocks
2174 * feature is turned on, then not all groups have this.
2176 for (i = 0; i < ngroups; i++)
2177 overhead += ext3_bg_has_super(sb, i) +
2178 ext3_bg_num_gdb(sb, i);
2181 * Every block group has an inode bitmap, a block
2182 * bitmap, and an inode table.
2184 overhead += (ngroups * (2 + EXT3_SB(sb)->s_itb_per_group));
2187 buf->f_type = EXT3_SUPER_MAGIC;
2188 buf->f_bsize = sb->s_blocksize;
2189 buf->f_blocks = le32_to_cpu(es->s_blocks_count) - overhead;
2190 buf->f_bfree = ext3_count_free_blocks (sb);
2191 buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count);
2192 if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count))
2194 buf->f_files = le32_to_cpu(es->s_inodes_count);
2195 buf->f_ffree = ext3_count_free_inodes (sb);
2196 buf->f_namelen = EXT3_NAME_LEN;
2200 /* Helper function for writing quotas on sync - we need to start transaction before quota file
2201 * is locked for write. Otherwise the are possible deadlocks:
2202 * Process 1 Process 2
2203 * ext3_create() quota_sync()
2204 * journal_start() write_dquot()
2205 * DQUOT_INIT() down(dqio_sem)
2206 * down(dqio_sem) journal_start()
2212 static inline struct inode *dquot_to_inode(struct dquot *dquot)
2214 return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]->f_dentry->d_inode;
2217 static int ext3_dquot_initialize(struct inode *inode, int type)
2222 /* We may create quota structure so we need to reserve enough blocks */
2223 handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS);
2225 return PTR_ERR(handle);
2226 ret = dquot_initialize(inode, type);
2227 err = ext3_journal_stop(handle);
2233 static int ext3_dquot_drop(struct inode *inode)
2238 /* We may delete quota structure so we need to reserve enough blocks */
2239 handle = ext3_journal_start(inode, 2*EXT3_QUOTA_INIT_BLOCKS);
2241 return PTR_ERR(handle);
2242 ret = dquot_drop(inode);
2243 err = ext3_journal_stop(handle);
2249 static int ext3_write_dquot(struct dquot *dquot)
2254 handle = ext3_journal_start(dquot_to_inode(dquot),
2255 EXT3_QUOTA_TRANS_BLOCKS);
2257 return PTR_ERR(handle);
2258 ret = dquot_commit(dquot);
2259 err = ext3_journal_stop(handle);
2265 static int ext3_acquire_dquot(struct dquot *dquot)
2270 handle = ext3_journal_start(dquot_to_inode(dquot),
2271 EXT3_QUOTA_INIT_BLOCKS);
2273 return PTR_ERR(handle);
2274 ret = dquot_acquire(dquot);
2275 err = ext3_journal_stop(handle);
2281 static int ext3_release_dquot(struct dquot *dquot)
2286 handle = ext3_journal_start(dquot_to_inode(dquot),
2287 EXT3_QUOTA_INIT_BLOCKS);
2289 return PTR_ERR(handle);
2290 ret = dquot_release(dquot);
2291 err = ext3_journal_stop(handle);
2297 static int ext3_mark_dquot_dirty(struct dquot *dquot)
2299 /* Are we journalling quotas? */
2300 if (EXT3_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] ||
2301 EXT3_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) {
2302 dquot_mark_dquot_dirty(dquot);
2303 return ext3_write_dquot(dquot);
2305 return dquot_mark_dquot_dirty(dquot);
2309 static int ext3_write_info(struct super_block *sb, int type)
2314 /* Data block + inode block */
2315 handle = ext3_journal_start(sb->s_root->d_inode, 2);
2317 return PTR_ERR(handle);
2318 ret = dquot_commit_info(sb, type);
2319 err = ext3_journal_stop(handle);
2326 * Turn on quotas during mount time - we need to find
2327 * the quota file and such...
2329 static int ext3_quota_on_mount(struct super_block *sb, int type)
2332 struct dentry *dentry;
2333 struct qstr name = { .name = EXT3_SB(sb)->s_qf_names[type],
2335 .len = strlen(EXT3_SB(sb)->s_qf_names[type])};
2337 dentry = lookup_hash(&name, sb->s_root);
2339 return PTR_ERR(dentry);
2340 err = vfs_quota_on_mount(type, EXT3_SB(sb)->s_jquota_fmt, dentry);
2343 /* We keep the dentry reference if everything went ok - we drop it
2344 * on quota_off time */
2348 /* Turn quotas off during mount time */
2349 static int ext3_quota_off_mount(struct super_block *sb, int type)
2352 struct dentry *dentry;
2354 dentry = sb_dqopt(sb)->files[type]->f_dentry;
2355 err = vfs_quota_off_mount(sb, type);
2356 /* We invalidate dentry - it has at least wrong hash... */
2357 d_invalidate(dentry);
2363 * Standard function to be called on quota_on
2365 static int ext3_quota_on(struct super_block *sb, int type, int format_id,
2369 struct nameidata nd;
2371 /* Not journalling quota? */
2372 if (!EXT3_SB(sb)->s_qf_names[USRQUOTA] &&
2373 !EXT3_SB(sb)->s_qf_names[GRPQUOTA])
2374 return vfs_quota_on(sb, type, format_id, path);
2375 err = path_lookup(path, LOOKUP_FOLLOW, &nd);
2378 /* Quotafile not on the same filesystem? */
2379 if (nd.mnt->mnt_sb != sb)
2381 /* Quotafile not of fs root? */
2382 if (nd.dentry->d_parent->d_inode != sb->s_root->d_inode)
2384 "EXT3-fs: Quota file not on filesystem root. "
2385 "Journalled quota will not work.\n");
2386 if (!ext3_should_journal_data(nd.dentry->d_inode))
2387 printk(KERN_WARNING "EXT3-fs: Quota file does not have "
2388 "data-journalling. Journalled quota will not work.\n");
2390 return vfs_quota_on(sb, type, format_id, path);
2395 static struct super_block *ext3_get_sb(struct file_system_type *fs_type,
2396 int flags, const char *dev_name, void *data)
2398 return get_sb_bdev(fs_type, flags, dev_name, data, ext3_fill_super);
2401 static struct file_system_type ext3_fs_type = {
2402 .owner = THIS_MODULE,
2404 .get_sb = ext3_get_sb,
2405 .kill_sb = kill_block_super,
2406 .fs_flags = FS_REQUIRES_DEV,
2409 static int __init init_ext3_fs(void)
2411 int err = init_ext3_xattr();
2414 err = init_inodecache();
2417 err = register_filesystem(&ext3_fs_type);
2422 destroy_inodecache();
2428 static void __exit exit_ext3_fs(void)
2430 unregister_filesystem(&ext3_fs_type);
2431 destroy_inodecache();
2435 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
2436 MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
2437 MODULE_LICENSE("GPL");
2438 module_init(init_ext3_fs)
2439 module_exit(exit_ext3_fs)