netdev - [PATCH net-next v3 08/32] net: Convert sysctl_pernet

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Date:   Tue, 13 Feb 2018 12:27:13 +0300
From:   Kirill Tkhai <ktkhai@...tuozzo.com>
To:     davem@...emloft.net, vyasevic@...hat.com,
        kstewart@...uxfoundation.org, pombredanne@...b.com,
        vyasevich@...il.com, mark.rutland@....com,
        gregkh@...uxfoundation.org, adobriyan@...il.com, fw@...len.de,
        nicolas.dichtel@...nd.com, xiyou.wangcong@...il.com,
        roman.kapl@...go.com, paul@...l-moore.com, dsahern@...il.com,
        daniel@...earbox.net, lucien.xin@...il.com,
        mschiffer@...verse-factory.net, rshearma@...cade.com,
        netdev@...r.kernel.org, ktkhai@...tuozzo.com,
        ebiederm@...ssion.com, avagin@...tuozzo.com,
        gorcunov@...tuozzo.com, eric.dumazet@...il.com,
        stephen@...workplumber.org, ktkhai@...tuozzo.com
Subject: [PATCH net-next v3 08/32] net: Convert sysctl_pernet_ops

This patch starts to convert pernet_subsys, registered
from core initcalls.

Methods sysctl_net_init() and sysctl_net_exit() initialize
net::sysctls table of a namespace.

pernet_operations::init()/exit() methods from the rest
of the list do not touch net::sysctls of strangers,
so it's safe to execute sysctl_pernet_ops's methods
in parallel with any other pernet_operations.

Signed-off-by: Kirill Tkhai <ktkhai@...tuozzo.com>
Acked-by: Andrei Vagin <avagin@...tuozzo.com>
---
 net/sysctl_net.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/net/sysctl_net.c b/net/sysctl_net.c
index 9aed6fe1bf1a..f424539829b7 100644
--- a/net/sysctl_net.c
+++ b/net/sysctl_net.c
@@ -89,6 +89,7 @@ static void __net_exit sysctl_net_exit(struct net *net)
 static struct pernet_operations sysctl_pernet_ops = {
 	.init = sysctl_net_init,
 	.exit = sysctl_net_exit,
+	.async = true,
 };
 
 static struct ctl_table_header *net_header;