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Commit 843fcf35 authored by Miao Xie's avatar Miao Xie Committed by Josef Bacik
Browse files

Btrfs: fix missing release of the space/qgroup reservation in start_transaction() 



When we fail to start a transaction, we need to release the reserved free space
and qgroup space, fix it.

Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
Reviewed-by: default avatarJan Schmidt <list.btrfs@jan-o-sch.net>
Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
parent 0a3404dc

fs/btrfs/transaction.c

+19 −8
Original line number Diff line number Diff line
@@ -333,12 +333,14 @@ start_transaction(struct btrfs_root *root, u64 num_items, int type, 
					  &root->fs_info->trans_block_rsv,

					  num_bytes, flush);

		if (ret)

			return ERR_PTR(ret);

			goto reserve_fail;

	}

again:

	h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);

	if (!h)

		return ERR_PTR(-ENOMEM);

	if (!h) {

		ret = -ENOMEM;

		goto alloc_fail;

	}



	/*

	 * If we are JOIN_NOLOCK we're already committing a transaction and
@@ -365,11 +367,7 @@ start_transaction(struct btrfs_root *root, u64 num_items, int type, 
	if (ret < 0) {

		/* We must get the transaction if we are JOIN_NOLOCK. */

		BUG_ON(type == TRANS_JOIN_NOLOCK);



		if (type < TRANS_JOIN_NOLOCK)

			sb_end_intwrite(root->fs_info->sb);

		kmem_cache_free(btrfs_trans_handle_cachep, h);

		return ERR_PTR(ret);

		goto join_fail;

	}



	cur_trans = root->fs_info->running_transaction;
@@ -410,6 +408,19 @@ start_transaction(struct btrfs_root *root, u64 num_items, int type, 
	if (!current->journal_info && type != TRANS_USERSPACE)

		current->journal_info = h;

	return h;



join_fail:

	if (type < TRANS_JOIN_NOLOCK)

		sb_end_intwrite(root->fs_info->sb);

	kmem_cache_free(btrfs_trans_handle_cachep, h);

alloc_fail:

	if (num_bytes)

		btrfs_block_rsv_release(root, &root->fs_info->trans_block_rsv,

					num_bytes);

reserve_fail:

	if (qgroup_reserved)

		btrfs_qgroup_free(root, qgroup_reserved);

	return ERR_PTR(ret);

}



struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,