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linux/net/sched
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WANG Cong 3cd904ecbb net_sched: kill u32_node pointer in Qdisc 
It is ugly to hide a u32-filter-specific pointer inside Qdisc,
this breaks the TC layers:

1. Qdisc is a generic representation, should not have any specific
   data of any type

2. Qdisc layer is above filter layer, should only save filters in
   the list of struct tcf_proto.

This pointer is used as the head of the chain of u32 hash tables,
that is struct tc_u_hnode, because u32 filter is very special,
it allows to create multiple hash tables within one qdisc and
across multiple u32 filters.

Instead of using this ugly pointer, we can just save it in a global
hash table key'ed by (dev ifindex, qdisc handle), therefore we can
still treat it as a per qdisc basis data structure conceptually.

Of course, because of network namespaces, this key is not unique
at all, but it is fine as we already have a pointer to Qdisc in
struct tc_u_common, we can just compare the pointers when collision.

And this only affects slow paths, has no impact to fast path,
thanks to the pointer ->tp_c.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-25 17:19:10 -07:00
..
act_api.c rtnetlink: make rtnl_register accept a flags parameter 2017-08-09 16:57:38 -07:00
act_bpf.c bpf: expose prog id for cls_bpf and act_bpf 2017-06-21 15:14:23 -04:00
act_connmark.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_csum.c net: Remove all references to SKB_GSO_UDP. 2017-07-17 09:52:58 -07:00
act_gact.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_ife.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_ipt.c net: sched: fix NULL pointer dereference when action calls some targets 2017-08-18 16:25:49 -07:00
act_meta_mark.c
act_meta_skbprio.c
act_meta_skbtcindex.c
act_mirred.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_nat.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_pedit.c net/act_pedit: fix an error code 2017-06-14 15:24:18 -04:00
act_police.c net_sched: move tcf_lock down after gen_replace_estimator() 2017-06-14 14:39:19 -04:00
act_sample.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_simple.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_skbedit.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_skbmod.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
act_tunnel_key.c net: sched: act_tunnel_key: make UDP checksum configurable 2017-06-15 14:21:03 -04:00
act_vlan.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
cls_api.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
cls_basic.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_bpf.c net: sched: remove cops->tcf_cl_offload 2017-08-11 13:47:01 -07:00
cls_cgroup.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_flow.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_flower.c net: sched: cls_flower: fix ndo_setup_tc type for stats call 2017-08-16 14:29:41 -07:00
cls_fw.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_matchall.c net: sched: remove cops->tcf_cl_offload 2017-08-11 13:47:01 -07:00
cls_route.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_rsvp6.c
cls_rsvp.c
cls_rsvp.h net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_tcindex.c net_sched: use void pointer for filter handle 2017-08-07 14:12:17 -07:00
cls_u32.c net_sched: kill u32_node pointer in Qdisc 2017-08-25 17:19:10 -07:00
em_canid.c
em_cmp.c
em_ipset.c netfilter: x_tables: move hook state into xt_action_param structure 2016-11-03 10:56:21 +01:00
em_meta.c net: convert sock.sk_refcnt from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
em_nbyte.c
em_text.c
em_u32.c
ematch.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
Kconfig net: sched: select cls when cls_act is enabled 2017-06-05 10:56:36 -04:00
Makefile net/sched: Introduce sample tc action 2017-01-24 13:44:28 -05:00
sch_api.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_atm.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_blackhole.c
sch_cbq.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_choke.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
sch_codel.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
sch_drr.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_dsmark.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_fifo.c
sch_fq_codel.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_fq.c mm, tree wide: replace __GFP_REPEAT by __GFP_RETRY_MAYFAIL with more useful semantic 2017-07-12 16:26:03 -07:00
sch_generic.c qdisc: add tracepoint qdisc:qdisc_dequeue for dequeued SKBs 2017-08-16 14:10:10 -07:00
sch_gred.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
sch_hfsc.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_hhf.c treewide: use kv[mz]alloc* rather than opencoded variants 2017-05-08 17:15:13 -07:00
sch_htb.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_ingress.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_mq.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_mqprio.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_multiq.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_netem.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_pie.c netlink: pass extended ACK struct to parsing functions 2017-04-13 13:58:22 -04:00
sch_plug.c
sch_prio.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_qfq.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_red.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_sfb.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_sfq.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_tbf.c net_sched: remove tc class reference counting 2017-08-25 17:19:10 -07:00
sch_teql.c net: make ndo_get_stats64 a void function 2017-01-08 17:51:44 -05:00