f2fs_io: support compress blocks ioctls

Adds to support below three commands to operate reserved blocks
in compressed inode.
- get_cblocks
- release_cblocks
- reserve_cblocks

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2 files changed