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linux/net/sched
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Eric Dumazet 69b7dca1a9 net_sched: fix pfifo_head_drop behavior vs backlog 
commit 6c0d54f189 upstream.

When the qdisc is full, we drop a packet at the head of the queue,
queue the current skb and return NET_XMIT_CN

Now we track backlog on upper qdiscs, we need to call
qdisc_tree_reduce_backlog(), even if the qlen did not change.

Fixes: 2ccccf5fb4 ("net_sched: update hierarchical backlog too")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
History 2016-08-22 22:38:15 +01:00
..
act_api.c net: sched: fix refcount imbalance in actions 2015-08-25 10:13:54 +01:00
act_csum.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_gact.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_ipt.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_mirred.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_nat.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_pedit.c act_pedit: check binding before calling tcf_hash_release() 2015-08-25 10:13:55 +01:00
act_police.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_simple.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
act_skbedit.c net_sched: act: move tcf_hashinfo_init() into tcf_register_action() 2014-02-12 19:23:32 -05:00
cls_api.c net_sched: copy exts->type in tcf_exts_change() 2014-10-15 12:05:30 +02:00
cls_basic.c sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_bpf.c net: cls_bpf: fix auto generation of per list handles 2015-03-20 09:36:24 +00:00
cls_cgroup.c sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_flow.c sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_fw.c sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_route.c sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_rsvp.c [NET_SCHED]: Remove unnecessary includes 2007-07-10 22:16:41 -07:00
cls_rsvp.h sched, cls: check if we could overwrite actions when changing a filter 2014-04-27 23:42:39 -04:00
cls_rsvp6.c [NET_SCHED]: Remove unnecessary includes 2007-07-10 22:16:41 -07:00
cls_tcindex.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-05-24 00:32:30 -04:00
cls_u32.c net_sched: avoid generating same handle for u32 filters 2014-07-20 20:49:17 -07:00
em_canid.c net: em_canid: Ematch rule to match CAN frames according to their identifiers 2012-07-04 13:07:05 +02:00
em_cmp.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_ipset.c em_ipset: use dev_net() accessor 2013-10-18 16:23:06 -04:00
em_meta.c net: Change skb_get_rxhash to skb_get_hash 2013-12-17 16:36:21 -05:00
em_nbyte.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_text.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
em_u32.c net_sched: cleanups 2011-01-19 23:31:12 -08:00
ematch.c ematch: Fix auto-loading of ematch modules. 2015-03-12 16:27:28 +00:00
Kconfig net: pkt_sched: PIE AQM scheme 2014-01-06 15:13:01 -05:00
Makefile net: pkt_sched: PIE AQM scheme 2014-01-06 15:13:01 -05:00
sch_api.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_atm.c net_sched: return nla_nest_end() instead of skb->len 2014-03-13 15:39:20 -04:00
sch_blackhole.c pkt_sched: Add qdisc->ops->peek() implementation. 2008-10-31 00:45:55 -07:00
sch_cbq.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_choke.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_codel.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_drr.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_dsmark.c net_sched: introduce qdisc_replace() helper 2016-08-22 22:38:15 +01:00
sch_fifo.c net_sched: fix pfifo_head_drop behavior vs backlog 2016-08-22 22:38:15 +01:00
sch_fq.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_fq_codel.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_generic.c net-sysfs: expose number of carrier on/off changes 2014-03-31 16:24:52 -04:00
sch_gred.c net_sched: replace pr_warning with pr_warn 2013-12-31 13:50:56 -05:00
sch_hfsc.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_hhf.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_htb.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_ingress.c net_sched: return nla_nest_end() instead of skb->len 2014-03-13 15:39:20 -04:00
sch_mq.c pkt_sched: give visibility to mq slave qdiscs 2013-12-09 19:54:47 -05:00
sch_mqprio.c pkt_sched: give visibility to mq slave qdiscs 2013-12-09 19:54:47 -05:00
sch_multiq.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_netem.c netem: fix a use after free 2016-08-22 22:38:15 +01:00
sch_pie.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_plug.c net_sched: sch_plug: plug_qdisc_ops is static 2012-02-13 16:04:40 -05:00
sch_prio.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_qfq.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_red.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_sfb.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_sfq.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_tbf.c net_sched: update hierarchical backlog too 2016-08-22 22:38:15 +01:00
sch_teql.c sch_teql: Convert over to dev_neigh_lookup_skb(). 2012-07-05 01:09:06 -07:00