tree 67373c29f348071727ab51c76c30b3ae886e4045
parent a9122886d9848d00a01888116a58624b9ba95cdc
author Konstantin Khlebnikov <khlebnikov@yandex-team.ru> 1529058451 +0300
committer David S. Miller <davem@davemloft.net> 1529192553 +0900

net_sched: blackhole: tell upper qdisc about dropped packets

When blackhole is used on top of classful qdisc like hfsc it breaks
qlen and backlog counters because packets are disappear without notice.

In HFSC non-zero qlen while all classes are inactive triggers warning:
WARNING: ... at net/sched/sch_hfsc.c:1393 hfsc_dequeue+0xba4/0xe90 [sch_hfsc]
and schedules watchdog work endlessly.

This patch return __NET_XMIT_BYPASS in addition to NET_XMIT_SUCCESS,
this flag tells upper layer: this packet is gone and isn't queued.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>