• Tejun Heo's avatar
    blkcg: move conf/stat file handling code to policies · 60c2bc2d
    Tejun Heo authored
    
    
    blkcg conf/stat handling is convoluted in that details which belong to
    specific policy implementations are all out in blkcg core and then
    policies hook into core layer to access and manipulate confs and
    stats.  This sadly achieves both inflexibility (confs/stats can't be
    modified without messing with blkcg core) and complexity (all the
    call-ins and call-backs).
    
    The previous patches restructured conf and stat handling code such
    that they can be separated out.  This patch relocates the file
    handling part.  All conf/stat file handling code which belongs to
    BLKIO_POLICY_PROP is moved to cfq-iosched.c and all
    BKLIO_POLICY_THROTL code to blk-throtl.c.
    
    The move is verbatim except for blkio_update_group_{weight|bps|iops}()
    callbacks which relays conf changes to policies.  The configuration
    settings are handled in policies themselves so the relaying isn't
    necessary.  Conf setting functions are modified to directly call
    per-policy update functions and the relaying mechanism is dropped.
    
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    60c2bc2d