Commit 45b90ec9 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

ipv6: addrconf_disable_policy() optimization 



Writing over /proc/sys/net/ipv6/conf/default/disable_policy
does not need to hold RTNL.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Reviewed-by: default avatarJiri Pirko <jiri@nvidia.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 624d5aec

net/ipv6/addrconf.c

+6 −7
Original line number Diff line number Diff line
@@ -6693,20 +6693,19 @@ void addrconf_disable_policy_idev(struct inet6_dev *idev, int val) 
static

int addrconf_disable_policy(struct ctl_table *ctl, int *valp, int val)

{

	struct net *net = (struct net *)ctl->extra2;

	struct inet6_dev *idev;

	struct net *net;



	if (valp == &net->ipv6.devconf_dflt->disable_policy) {

		WRITE_ONCE(*valp, val);

		return 0;

	}



	if (!rtnl_trylock())

		return restart_syscall();



	WRITE_ONCE(*valp, val);



	net = (struct net *)ctl->extra2;

	if (valp == &net->ipv6.devconf_dflt->disable_policy) {

		rtnl_unlock();

		return 0;

	}



	if (valp == &net->ipv6.devconf_all->disable_policy)  {

		struct net_device *dev;