From 4b5829a8e3104c8bc115d926a0285d3ff9bcfc77 Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Wed, 5 Dec 2012 10:53:25 +0000
Subject: Btrfs: fix missing reserved space release in error path of delalloc
 reservation

We forget to release the reserved space in the error path of delalloc
reservatiom, fix it.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 98af837..e152809 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4559,6 +4559,9 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 		ret = btrfs_qgroup_reserve(root, num_bytes +
 					   nr_extents * root->leafsize);
 		if (ret) {
+			spin_lock(&BTRFS_I(inode)->lock);
+			calc_csum_metadata_size(inode, num_bytes, 0);
+			spin_unlock(&BTRFS_I(inode)->lock);
 			mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
 			return ret;
 		}
@@ -4594,6 +4597,10 @@ int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes)
 						      btrfs_ino(inode),
 						      to_free, 0);
 		}
+		if (root->fs_info->quota_enabled) {
+			btrfs_qgroup_free(root, num_bytes +
+						nr_extents * root->leafsize);
+		}
 		mutex_unlock(&BTRFS_I(inode)->delalloc_mutex);
 		return ret;
 	}
-- 
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