ext4: Split uninitialized extents for direct I/O
When writing into an unitialized extent via direct I/O, and the direct
I/O doesn't exactly cover the unitialized extent, split the extent
into uninitialized and initialized extents before submitting the I/O.
This avoids needing to deal with an ENOSPC error in the end_io
callback that gets used for direct I/O.
When the IO is complete, the written extent will be marked as initialized.
Singed-Off-By: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index c07a291..5332fd4 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -322,7 +322,7 @@
goto out;
if (ext4_ext_insert_extent(handle, orig_inode,
- orig_path, new_ext))
+ orig_path, new_ext, 0))
goto out;
}
@@ -333,7 +333,7 @@
goto out;
if (ext4_ext_insert_extent(handle, orig_inode,
- orig_path, end_ext))
+ orig_path, end_ext, 0))
goto out;
}
out: