• Tejun Heo's avatar
    blkcg: move body parsing from blkg_conf_prep() to its callers · 36aa9e5f
    Tejun Heo authored
    
    
    Currently, blkg_conf_prep() expects input to be of the following form
    
     MAJ:MIN NUM
    
    and reads the NUM part into blkg_conf_ctx->v.  This is quite
    restrictive and gets in the way in implementing blkcg interface for
    the unified hierarchy.  This patch updates blkg_conf_prep() so that it
    expects
    
     MAJ:MIN BODY_STR
    
    where BODY_STR is an arbitrary string.  blkg_conf_ctx->v is replaced
    with ->body which is a char pointer pointing to the start of BODY_STR.
    Parsing of the body is moved to blkg_conf_prep()'s callers.
    
    To allow using, for example, strsep() on blkg_conf_ctx->val, it is a
    non-const pointer and to accommodate that const is dropped from @input
    too.
    
    This doesn't cause any behavior changes.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Signed-off-by: default avatarJens Axboe <axboe@fb.com>
    36aa9e5f
blk-cgroup.h 21.8 KB