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Btrfs: add mount option to force UUID tree checking 

This should never be needed, but since all functions are there
to check and rebuild the UUID tree, a mount option is added that
allows to force this check and rebuild procedure.

Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Stefan Behrens 2013-08-15 17:11:24 +02:00 committed by Chris Mason
parent 70f8017547
commit f420ee1e92
3 changed files with 10 additions and 2 deletions
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1
fs/btrfs/ctree.h
View File

@ -1998,6 +1998,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22)
#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23)
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)

3
fs/btrfs/disk-io.c
View File

@ -2929,7 +2929,8 @@ int open_ctree(struct super_block *sb,
close_ctree(tree_root);
return ret;
}
} else if (check_uuid_tree) {
} else if (check_uuid_tree ||
btrfs_test_opt(tree_root, RESCAN_UUID_TREE)) {
pr_info("btrfs: checking UUID tree\n");
ret = btrfs_check_uuid_tree(fs_info);
if (ret) {

8
fs/btrfs/super.c
View File

@ -321,7 +321,7 @@ enum {
Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache,
Opt_no_space_cache, Opt_recovery, Opt_skip_balance,
Opt_check_integrity, Opt_check_integrity_including_extent_data,
Opt_check_integrity_print_mask, Opt_fatal_errors,
Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
Opt_commit_interval,
Opt_err,
};
@ -362,6 +362,7 @@ static match_table_t tokens = {
{Opt_check_integrity, "check_int"},
{Opt_check_integrity_including_extent_data, "check_int_data"},
{Opt_check_integrity_print_mask, "check_int_print_mask=%d"},
{Opt_rescan_uuid_tree, "rescan_uuid_tree"},
{Opt_fatal_errors, "fatal_errors=%s"},
{Opt_commit_interval, "commit=%d"},
{Opt_err, NULL},
@ -572,6 +573,9 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
case Opt_space_cache:
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
break;
case Opt_rescan_uuid_tree:
btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE);
break;
case Opt_no_space_cache:
printk(KERN_INFO "btrfs: disabling disk space caching\n");
btrfs_clear_opt(info->mount_opt, SPACE_CACHE);
@ -979,6 +983,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",space_cache");
else
seq_puts(seq, ",nospace_cache");
if (btrfs_test_opt(root, RESCAN_UUID_TREE))
seq_puts(seq, ",rescan_uuid_tree");
if (btrfs_test_opt(root, CLEAR_CACHE))
seq_puts(seq, ",clear_cache");
if (btrfs_test_opt(root, USER_SUBVOL_RM_ALLOWED))