• Zheng Liu's avatar
    ext4: add punching hole support for non-extent-mapped files · 8bad6fc8
    Zheng Liu authored
    This patch add supports for indirect file support punching hole.  It
    is almost the same as ext4_ext_punch_hole.  First, we invalidate all
    pages between this hole, and then we try to deallocate all blocks of
    this hole.
    
    A recursive function is used to handle deallocation of blocks.  In
    this function, it iterates over the entries in inode's i_blocks or
    indirect blocks, and try to free the block for each one of them.
    
    After applying this patch, xfstest #255 will not pass w/o extent because
    indirect-based file doesn't support unwritten extents.
    Signed-off-by: default avatarZheng Liu <wenqing.lz@taobao.com>
    Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
    8bad6fc8
indirect.c 50.6 KB