net: Convert icmpv6_sk_ops, ndisc_net_ops and igmp6_net_ops (1a2e9332) · Commits · 戴 / test

These pernet_operations create and destroy net::ipv6.icmp_sk socket, used to send ICMP or error reply. Nobody can dereference the socket to handle a packet before net is initialized, as there is no routing; nobody can do that in parallel with exit, as all of devices are moved to init_net or destroyed and there are no packets it-flight. So, it's possible to mark these pernet_operations as async. The same for ndisc_net_ops and for igmp6_net_ops. The last one also creates and destroys /proc entries. Signed-off-by:

Kirill Tkhai <ktkhai@virtuozzo.com> Signed-off-by:

David S. Miller <davem@davemloft.net>

net/ipv6/icmp.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -997,6 +997,7 @@ static void __net_exit icmpv6_sk_exit(struct net *net)
		static struct pernet_operations icmpv6_sk_ops = {
		.init = icmpv6_sk_init,
		.exit = icmpv6_sk_exit,
		.async = true,
		};

		int __init icmpv6_init(void)

net/ipv6/mcast.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2997,6 +2997,7 @@ static void __net_exit igmp6_net_exit(struct net *net)
		static struct pernet_operations igmp6_net_ops = {
		.init = igmp6_net_init,
		.exit = igmp6_net_exit,
		.async = true,
		};

		int __init igmp6_init(void)

net/ipv6/ndisc.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1882,6 +1882,7 @@ static void __net_exit ndisc_net_exit(struct net *net)
		static struct pernet_operations ndisc_net_ops = {
		.init = ndisc_net_init,
		.exit = ndisc_net_exit,
		.async = true,
		};

		int __init ndisc_init(void)

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