ext2fs_extent_open: If the inode is empty, initialize the extent tree

If the inode's i_block[] array is completely empty, create an empty
extent tree in the in-core inode and set the EXT4_EXTENT_FL inode
flag.  This makes it easy to create a new inode using extents.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
1 file changed