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ipv6: addrconf_disable_policy() optimization

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

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2024-02-28 13:54:36 +00:00
committed by David S. Miller
parent 624d5aec48
commit 45b90ec9a2
1 changed files with 6 additions and 7 deletions
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13
net/ipv6/addrconf.c
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@@ -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;