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    xfs: convert buffer verifiers to an ops structure. · 1813dd64
    Dave Chinner 提交于
    To separate the verifiers from iodone functions and associate read
    and write verifiers at the same time, introduce a buffer verifier
    operations structure to the xfs_buf.
    
    This avoids the need for assigning the write verifier, clearing the
    iodone function and re-running ioend processing in the read
    verifier, and gets rid of the nasty "b_pre_io" name for the write
    verifier function pointer. If we ever need to, it will also be
    easier to add further content specific callbacks to a buffer with an
    ops structure in place.
    
    We also avoid needing to export verifier functions, instead we
    can simply export the ops structures for those that are needed
    outside the function they are defined in.
    
    This patch also fixes a directory block readahead verifier issue
    it exposed.
    
    This patch also adds ops callbacks to the inode/alloc btree blocks
    initialised by growfs. These will need more work before they will
    work with CRCs.
    Signed-off-by: NDave Chinner <dchinner@redhat.com>
    Reviewed-by: NPhil White <pwhite@sgi.com>
    Signed-off-by: NBen Myers <bpm@sgi.com>
    1813dd64
xfs_buf.h 11.7 KB