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btrfs-progs: fsck: clear out log tree in repair mode 

Repair mode will commit transaction which will make us
fail to load log tree anymore.

Give a warning to common users, if they really want to
coninue, we will clear out log tree.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Wang Shilong 2014-04-24 11:19:16 +08:00 committed by David Sterba
parent 897c98de73
commit adfe8b5cfb
1 changed files with 33 additions and 0 deletions
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33
cmds-check.c
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@ -6551,6 +6551,22 @@ out:
return ret;
}
static int zero_log_tree(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
int ret;
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
return ret;
}
btrfs_set_super_log_root(root->fs_info->super_copy, 0);
btrfs_set_super_log_root_level(root->fs_info->super_copy, 0);
ret = btrfs_commit_transaction(trans, root);
return ret;
}
static struct option long_options[] = {
{ "super", 1, NULL, 's' },
{ "repair", 0, NULL, 0 },
@ -6670,6 +6686,23 @@ int cmd_check(int argc, char **argv)
}
root = info->fs_root;
/*
* repair mode will force us to commit transaction which
* will make us fail to load log tree when mounting.
*/
if (repair && btrfs_super_log_root(info->super_copy)) {
ret = ask_user("repair mode will force to clear out log tree, Are you sure?");
if (!ret) {
ret = 1;
goto close_out;
}
ret = zero_log_tree(root);
if (ret) {
fprintf(stderr, "fail to zero log tree\n");
goto close_out;
}
}
uuid_unparse(info->super_copy->fsid, uuidbuf);
if (qgroup_report) {
printf("Print quota groups for %s\nUUID: %s\n", argv[optind],