tmp_suning_uos_patched/net/sched
Daniel Borkmann ea7f8277f9 net, cls: allow for deleting all filters for given parent
Add a possibility where the user can just specify the parent and
all filters under that parent are then being purged. Currently,
for example for scripting, one needs to specify pref/prio to have
a well-defined number for 'tc filter del' command for addressing
the previously created instance or additionally filter handle in
case of priorities being the same. Improve usage by allowing the
option for tc to specify the parent and removing the whole chain
for that given parent.

Example usage after patch, no tc changes required:

  # tc qdisc replace dev foo clsact
  # tc filter add dev foo egress bpf da obj ./bpf.o
  # tc filter add dev foo egress bpf da obj ./bpf.o
  # tc filter show dev foo egress
  filter protocol all pref 49151 bpf
  filter protocol all pref 49151 bpf handle 0x1 bpf.o:[classifier] direct-action
  filter protocol all pref 49152 bpf
  filter protocol all pref 49152 bpf handle 0x1 bpf.o:[classifier] direct-action
  # tc filter del dev foo egress
  # tc filter show dev foo egress
  #

Previously, RTM_DELTFILTER requests with invalid prio of 0 were
rejected, so only netlink requests with RTM_NEWTFILTER and NLM_F_CREATE
flag were allowed where the kernel would auto-generate a pref/prio.
We can piggyback on that and use prio of 0 as a wildcard for
requests of RTM_DELTFILTER.

For notifying tc netlink monitoring users (e.g. libnl uses this
for caching), there are two options, that is, sending individual
tfilter_notify() notifications for each tcf_proto, or sending a
single one indicating wildcard removal. I tried both and there
are pros and cons for each, eventually I decided for sending
individual tfilter_notify(), so that user space can support this
seamlessly and there won't be a mess of changing each and every
application to make sure expectations from the kernel won't break
when they don't understand single notification. Since linear chains
don't really scale, I expect only a handful of classifiers to be
attached at max for a given parent anyway.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-06-10 18:11:01 -07:00
..
act_api.c net: sched: do not acquire qdisc spinlock in qdisc/class stats dump 2016-06-07 16:37:14 -07:00
act_bpf.c net sched: indentation and other OCD stylistic fixes 2016-06-07 15:53:54 -07:00
act_connmark.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_csum.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_gact.c net sched: indentation and other OCD stylistic fixes 2016-06-07 15:53:54 -07:00
act_ife.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_ipt.c net sched: indentation and other OCD stylistic fixes 2016-06-07 15:53:54 -07:00
act_meta_mark.c Support to encoding decoding skb mark on IFE action 2016-03-01 17:15:23 -05:00
act_meta_skbprio.c Support to encoding decoding skb prio on IFE action 2016-03-01 17:15:23 -05:00
act_mirred.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_nat.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_pedit.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_police.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
act_simple.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_skbedit.c net sched actions: aggregate dumping of actions timeinfo 2016-06-07 15:53:43 -07:00
act_vlan.c net sched: indentation and other OCD stylistic fixes 2016-06-07 15:53:54 -07:00
cls_api.c net, cls: allow for deleting all filters for given parent 2016-06-10 18:11:01 -07:00
cls_basic.c net_sched: destroy proto tp when all filters are gone 2015-03-09 15:35:55 -04:00
cls_bpf.c bpf: wire in data and data_end for cls_act_bpf 2016-05-06 16:01:54 -04:00
cls_cgroup.c cls_cgroup: factor out classid retrieval 2015-07-20 12:41:30 -07:00
cls_flow.c sched: cls_flow: use skb_to_full_sk() helper 2015-11-08 20:56:39 -05:00
cls_flower.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
cls_fw.c net: revert "net_sched: move tp->root allocation into fw_init()" 2015-09-24 14:33:30 -07:00
cls_route.c net_sched: destroy proto tp when all filters are gone 2015-03-09 15:35:55 -04:00
cls_rsvp6.c
cls_rsvp.c
cls_rsvp.h net_sched: convert rsvp to call tcf_exts_destroy from rcu callback 2015-08-26 11:01:45 -07:00
cls_tcindex.c net_sched: convert tcindex to call tcf_exts_destroy from rcu callback 2015-08-26 11:01:44 -07:00
cls_u32.c net: cls_u32: be more strict about skip-sw flag for knodes 2016-06-08 21:43:14 -07:00
em_canid.c net: sched: remove tcf_proto from ematch calls 2014-10-06 18:02:32 -04:00
em_cmp.c
em_ipset.c netfilter: x_tables: Pass struct net in xt_action_param 2015-09-18 21:58:14 +02:00
em_meta.c qdisc: constify meta_type_ops structures 2016-04-14 00:35:30 -04:00
em_nbyte.c net: sched: remove tcf_proto from ematch calls 2014-10-06 18:02:32 -04:00
em_text.c net: Remove state argument from skb_find_text() 2015-02-22 15:59:54 -05:00
em_u32.c
ematch.c ematch: Fix auto-loading of ematch modules. 2015-02-20 15:30:56 -05:00
Kconfig Support to encoding decoding skb prio on IFE action 2016-03-01 17:15:23 -05:00
Makefile Support to encoding decoding skb prio on IFE action 2016-03-01 17:15:23 -05:00
sch_api.c net: sched: do not acquire qdisc spinlock in qdisc/class stats dump 2016-06-07 16:37:14 -07:00
sch_atm.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_blackhole.c net/sched: make sch_blackhole.c explicitly non-modular 2015-10-09 07:52:28 -07:00
sch_cbq.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_choke.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_codel.c codel: split into multiple files 2016-04-25 16:44:27 -04:00
sch_drr.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_dsmark.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_fifo.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_fq_codel.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_fq.c net_sched: update hierarchical backlog too 2016-02-29 17:02:33 -05:00
sch_generic.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_gred.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_hfsc.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_hhf.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_htb.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_ingress.c net: sched: fix tc_should_offload for specific clsact classes 2016-06-07 16:59:53 -07:00
sch_mq.c net: sched: do not acquire qdisc spinlock in qdisc/class stats dump 2016-06-07 16:37:14 -07:00
sch_mqprio.c net: sched: do not acquire qdisc spinlock in qdisc/class stats dump 2016-06-07 16:37:14 -07:00
sch_multiq.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_netem.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_pie.c net_sched: update hierarchical backlog too 2016-02-29 17:02:33 -05:00
sch_plug.c sched: remove qdisc_rehape_fail 2016-06-08 23:58:51 -07:00
sch_prio.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_qfq.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_red.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_sfb.c net_sched: update hierarchical backlog too 2016-02-29 17:02:33 -05:00
sch_sfq.c sched: remove qdisc->drop 2016-06-08 23:58:52 -07:00
sch_tbf.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-10 11:52:24 -07:00
sch_teql.c net: sched: fix skb->protocol use in case of accelerated vlan path 2015-01-13 17:51:08 -05:00