From: Jiri Pirko <jiri@resnulli.us>
To: Vlad Buslov <vladbu@mellanox.com>
Cc: netdev@vger.kernel.org, davem@davemloft.net, jhs@mojatatu.com,
xiyou.wangcong@gmail.com, pablo@netfilter.org,
kadlec@blackhole.kfki.hu, fw@strlen.de, ast@kernel.org,
daniel@iogearbox.net, edumazet@google.com, keescook@chromium.org,
linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org,
coreteam@netfilter.org, kliteyn@mellanox.com
Subject: Re: [PATCH 14/14] net: sched: implement delete for all actions
Date: Wed, 16 May 2018 11:48:50 +0200 [thread overview]
Message-ID: <20180516094850.GF1972@nanopsycho> (raw)
In-Reply-To: <1526308035-12484-15-git-send-email-vladbu@mellanox.com>
Mon, May 14, 2018 at 04:27:15PM CEST, vladbu@mellanox.com wrote:
>Implement delete function that is required to delete actions without
>holding rtnl lock. Use action API function that atomically deletes action
>only if it is still in action idr. This implementation prevents concurrent
>threads from deleting same action twice.
>
>Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
>---
> net/sched/act_bpf.c | 8 ++++++++
> net/sched/act_connmark.c | 8 ++++++++
> net/sched/act_csum.c | 8 ++++++++
> net/sched/act_gact.c | 8 ++++++++
> net/sched/act_ife.c | 8 ++++++++
> net/sched/act_ipt.c | 16 ++++++++++++++++
> net/sched/act_mirred.c | 8 ++++++++
> net/sched/act_nat.c | 8 ++++++++
> net/sched/act_pedit.c | 8 ++++++++
> net/sched/act_police.c | 8 ++++++++
> net/sched/act_sample.c | 8 ++++++++
> net/sched/act_simple.c | 8 ++++++++
> net/sched/act_skbedit.c | 8 ++++++++
> net/sched/act_skbmod.c | 8 ++++++++
> net/sched/act_tunnel_key.c | 8 ++++++++
> net/sched/act_vlan.c | 8 ++++++++
> 16 files changed, 136 insertions(+)
>
>diff --git a/net/sched/act_bpf.c b/net/sched/act_bpf.c
>index 0bf4ecf..36f7f66 100644
>--- a/net/sched/act_bpf.c
>+++ b/net/sched/act_bpf.c
>@@ -394,6 +394,13 @@ static int tcf_bpf_search(struct net *net, struct tc_action **a, u32 index,
> return tcf_idr_search(tn, a, index);
> }
>
>+static int tcf_bpf_delete(struct net *net, u32 index)
>+{
>+ struct tc_action_net *tn = net_generic(net, bpf_net_id);
>+
>+ return tcf_idr_find_delete(tn, index);
>+}
>+
> static struct tc_action_ops act_bpf_ops __read_mostly = {
> .kind = "bpf",
> .type = TCA_ACT_BPF,
>@@ -404,6 +411,7 @@ static struct tc_action_ops act_bpf_ops __read_mostly = {
> .init = tcf_bpf_init,
> .walk = tcf_bpf_walker,
> .lookup = tcf_bpf_search,
>+ .delete = tcf_bpf_delete,
I wonder, right before this patch, how the idr index got removed?
delete op is NULL and I didn't find anyone else to do it.
Also, after this patch, does it make sense to have following check in
tcf_action_del_1()?
if (ops->delete)
err = ops->delete(net, index);
Looks like ops->delete is non-null for all.
Seems to me that you need to introduce this patch filling up the delete
op in all acts and only after that introduce a code that actually calls
it.
[...]
next prev parent reply other threads:[~2018-05-16 9:49 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-14 14:27 [PATCH 00/14] Modify action API for implementing lockless actions Vlad Buslov
2018-05-14 14:27 ` [PATCH 01/14] net: sched: use rcu for action cookie update Vlad Buslov
2018-05-14 15:10 ` Jiri Pirko
2018-05-14 23:39 ` kbuild test robot
2018-05-14 14:27 ` [PATCH 02/14] net: sched: change type of reference and bind counters Vlad Buslov
2018-05-14 15:11 ` Jiri Pirko
2018-05-19 21:04 ` Marcelo Ricardo Leitner
2018-05-20 10:55 ` Vlad Buslov
2018-05-14 14:27 ` [PATCH 03/14] net: sched: add 'delete' function to action ops Vlad Buslov
2018-05-14 15:12 ` Jiri Pirko
2018-05-14 16:30 ` Jiri Pirko
2018-05-14 14:27 ` [PATCH 04/14] net: sched: implement unlocked action init API Vlad Buslov
2018-05-14 15:16 ` Jiri Pirko
2018-05-19 21:11 ` Marcelo Ricardo Leitner
2018-05-14 14:27 ` [PATCH 05/14] net: sched: always take reference to action Vlad Buslov
2018-05-14 16:23 ` Jiri Pirko
2018-05-14 18:49 ` Vlad Buslov
2018-05-15 8:58 ` Jiri Pirko
2018-05-15 11:52 ` Vlad Buslov
2018-05-15 1:38 ` kbuild test robot
2018-05-15 1:38 ` [RFC PATCH] net: sched: __tcf_idr_check() can be static kbuild test robot
2018-05-14 14:27 ` [PATCH 06/14] net: sched: implement reference counted action release Vlad Buslov
2018-05-14 16:28 ` Jiri Pirko
2018-05-14 16:47 ` Jiri Pirko
2018-05-14 19:07 ` Vlad Buslov
2018-05-15 9:03 ` Jiri Pirko
2018-05-15 9:16 ` Vlad Buslov
2018-05-19 21:43 ` Marcelo Ricardo Leitner
2018-05-20 6:22 ` Jiri Pirko
2018-05-20 10:59 ` Vlad Buslov
2018-05-14 14:27 ` [PATCH 07/14] net: sched: use reference counting action init Vlad Buslov
2018-05-15 11:24 ` Jiri Pirko
2018-05-15 11:32 ` Vlad Buslov
2018-05-15 11:39 ` Jiri Pirko
2018-05-15 11:41 ` Vlad Buslov
2018-05-15 11:57 ` Jiri Pirko
2018-05-15 12:00 ` Vlad Buslov
2018-05-14 14:27 ` [PATCH 08/14] net: sched: account for temporary action reference Vlad Buslov
2018-05-16 7:12 ` Jiri Pirko
2018-05-14 14:27 ` [PATCH 09/14] net: sched: don't release reference on action overwrite Vlad Buslov
2018-05-16 7:43 ` Jiri Pirko
2018-05-16 7:47 ` Vlad Buslov
2018-05-16 7:50 ` Jiri Pirko
2018-05-19 21:52 ` Marcelo Ricardo Leitner
2018-05-20 18:42 ` Vlad Buslov
2018-05-14 14:27 ` [PATCH 10/14] net: sched: extend act API for lockless actions Vlad Buslov
2018-05-16 7:50 ` Jiri Pirko
2018-05-16 8:16 ` Vlad Buslov
2018-05-16 8:56 ` Jiri Pirko
2018-05-16 9:39 ` Vlad Buslov
2018-05-19 22:17 ` Marcelo Ricardo Leitner
2018-05-14 14:27 ` [PATCH 11/14] net: core: add new/replace rate estimator lock parameter Vlad Buslov
2018-05-16 9:54 ` Jiri Pirko
2018-05-16 10:00 ` Vlad Buslov
2018-05-16 10:11 ` Jiri Pirko
2018-05-14 14:27 ` [PATCH 12/14] net: sched: retry action check-insert on concurrent modification Vlad Buslov
2018-05-16 9:59 ` Jiri Pirko
2018-05-16 11:55 ` Vlad Buslov
2018-05-16 12:26 ` Jiri Pirko
2018-05-16 12:43 ` Vlad Buslov
2018-05-16 13:21 ` Jiri Pirko
2018-05-16 13:52 ` Vlad Buslov
2018-05-16 14:13 ` Jiri Pirko
2018-05-16 14:26 ` Vlad Buslov
2018-05-16 14:55 ` Jiri Pirko
2018-05-19 22:35 ` Marcelo Ricardo Leitner
2018-05-14 14:27 ` [PATCH 13/14] net: sched: use unique idr insert function in unlocked actions Vlad Buslov
2018-05-16 9:50 ` Jiri Pirko
2018-05-16 9:54 ` Vlad Buslov
2018-05-19 22:20 ` Marcelo Ricardo Leitner
2018-05-20 21:13 ` Or Gerlitz
2018-05-20 21:33 ` Marcelo Ricardo Leitner
2018-05-20 21:40 ` Or Gerlitz
2018-05-20 22:43 ` Marcelo Ricardo Leitner
2018-05-14 14:27 ` [PATCH 14/14] net: sched: implement delete for all actions Vlad Buslov
2018-05-16 9:48 ` Jiri Pirko [this message]
2018-05-16 9:58 ` Vlad Buslov
2018-05-19 22:45 ` Marcelo Ricardo Leitner
2018-05-14 18:03 ` [PATCH 00/14] Modify action API for implementing lockless actions Jamal Hadi Salim
2018-05-14 20:46 ` Vlad Buslov
2018-05-15 18:25 ` Jamal Hadi Salim
2018-05-15 21:21 ` Vlad Buslov
2018-05-15 8:20 ` Jiri Pirko
2018-05-24 23:34 ` Cong Wang
2018-05-25 20:39 ` Vlad Buslov
2018-05-25 21:40 ` Cong Wang
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