Commit 8cd2807f authored by Miao Xie's avatar Miao Xie Committed by Chris Mason
Browse files

Btrfs: fix wrong return value of btrfs_wait_for_commit() 



If the id of the existed transaction is more than the one we specified, it
means the specified transaction was commited, so we should return 0, not
EINVAL.

Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
parent ff7c1d33

fs/btrfs/transaction.c

+8 −7
Original line number Diff line number Diff line
@@ -456,28 +456,31 @@ static noinline void wait_for_commit(struct btrfs_root *root, 
int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)

{

	struct btrfs_transaction *cur_trans = NULL, *t;

	int ret;

	int ret = 0;



	ret = 0;

	if (transid) {

		if (transid <= root->fs_info->last_trans_committed)

			goto out;



		ret = -EINVAL;

		/* find specified transaction */

		spin_lock(&root->fs_info->trans_lock);

		list_for_each_entry(t, &root->fs_info->trans_list, list) {

			if (t->transid == transid) {

				cur_trans = t;

				atomic_inc(&cur_trans->use_count);

				ret = 0;

				break;

			}

			if (t->transid > transid)

			if (t->transid > transid) {

				ret = 0;

				break;

			}

		}

		spin_unlock(&root->fs_info->trans_lock);

		ret = -EINVAL;

		/* The specified transaction doesn't exist */

		if (!cur_trans)

			goto out;  /* bad transid */

			goto out;

	} else {

		/* find newest transaction that is committing | committed */

		spin_lock(&root->fs_info->trans_lock);
@@ -497,9 +500,7 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid) 
	}



	wait_for_commit(root, cur_trans);



	put_transaction(cur_trans);

	ret = 0;

out:

	return ret;

}