[PATCH] ext4: When reading from fallocated blocks make sure we return zero.

Aneesh Kumar K.V
2008-02-15T18:16:59Z

fallocate blocks are considered as sparse area and read from them should
return zero. ext4_ext_get_blocks should return zero for read request.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
fs/ext4/extents.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 3efbfd1..5b22f71 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2379,8 +2379,14 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
}
if (create == EXT4_CREATE_UNINITIALIZED_EXT)
goto out;
- if (!create)
+ if (!create) {
+ /*
+ * read request should return zero blocks
+ * allocated
+ */
+ allocated = 0;
goto out2;
+ }

ret = ext4_ext_convert_to_initialized(handle, inode,
path, iblock,
--
1.5.4.1.97.g40aab-dirty