• Tao Ma's avatar
    ocfs2: Add CoW support. · 6f70fa51
    Tao Ma authored
    This patch try CoW support for a refcounted record.
    
    the whole process will be:
    1. Calculate how many clusters we need to CoW and where we start.
       Extents that are not completely encompassed by the write will
       be broken on 1MB boundaries.
    2. Do CoW for the clusters with the help of page cache.
    3. Change the b-tree structure with the new allocated clusters.
    Signed-off-by: default avatarTao Ma <tao.ma@oracle.com>
    6f70fa51
alloc.h 11.5 KB