• Paolo Abeni's avatar
    net: sched: introduce and use qstats read helpers · 5dd431b6
    Paolo Abeni authored
    Classful qdiscs can't access directly the child qdiscs backlog
    length: if such qdisc is NOLOCK, per CPU values should be
    accounted instead.
    
    Most qdiscs no not respect the above. As a result, qstats fetching
    for most classful qdisc is currently incorrect: if the child qdisc is
    NOLOCK, it always reports 0 len backlog.
    
    This change introduces a pair of helpers to safely fetch
    both backlog and qlen and use them in stats class dumping
    functions, fixing the above issue and cleaning a bit the code.
    
    DRR needs also to access the child qdisc queue length, so it
    needs custom handling.
    
    Fixes: c5ad119f ("net: sched: pfifo_fast use skb_array")
    Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    5dd431b6
sch_taprio.c 22.4 KB