[PATCH 6/7] ext4: punch hole should be restarted after transaction restart

[Dmitry Monakhov <dmonakhov@openvz.org>]

ext4_ext_rm_leaf() may return -EAGAIN due to transaction restart,
repeat attempt in that case.

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
---
 fs/ext4/extents.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5cce39a..a77cde2 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3795,7 +3795,7 @@ static int get_implied_cluster_alloc(struct super_block *sb,
 int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 			struct ext4_map_blocks *map, int flags)
 {
-	struct ext4_ext_path *path = NULL;
+	struct ext4_ext_path *path;
 	struct ext4_extent newex, *ex, *ex2;
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	ext4_fsblk_t newblock = 0;
@@ -3811,6 +3811,9 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 		  map->m_lblk, map->m_len, inode->i_ino);
 	trace_ext4_ext_map_blocks_enter(inode, map->m_lblk, map->m_len, flags);
 
+again:
+	path = NULL;
+
 	/* check in cache */
 	if (!(flags & EXT4_GET_BLOCKS_PUNCH_OUT_EXT) &&
 		ext4_ext_in_cache(inode, map->m_lblk, &newex)) {
@@ -3904,6 +3907,8 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 			}
 			ret = ext4_ext_handle_punched_extent(handle, inode,
 							map, path);
+			if (ret == -EAGAIN)
+				goto again;
 			return ret;
 		}
 	}
-- 
1.7.1