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>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 98af8379895a..e15280989188 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;
         }