• Joel Becker's avatar
    ocfs2: Validate metadata only when it's read from disk. · 970e4936
    Joel Becker authored
    Add an optional validation hook to ocfs2_read_blocks().  Now the
    validation function is only called when a block was actually read off of
    disk.  It is not called when the buffer was in cache.
    
    We add a buffer state bit BH_NeedsValidate to flag these buffers.  It
    must always be one higher than the last JBD2 buffer state bit.
    
    The dinode, dirblock, extent_block, and xattr_block validators are
    lifted to this scheme directly.  The group_descriptor validator needs to
    be split into two pieces.  The first part only needs the gd buffer and
    is passed to ocfs2_read_block().  The second part requires the dinode as
    well, and is called every time.  It's only 3 compares, so it's tiny.
    This also allows us to clean up the non-fatal gd check used by resize.c.
    It now has no magic argument.
    Signed-off-by: default avatarJoel Becker <joel.becker@oracle.com>
    Signed-off-by: default avatarMark Fasheh <mfasheh@suse.com>
    970e4936
buffer_head_io.h 2.36 KB