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Commit d18c5d19 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

net: ipv4: Notify about changes to ip_forward_update_priority 



Drivers may make offloading decision based on whether
ip_forward_update_priority is enabled or not. Therefore distribute
netevent notifications to give them a chance to react to a change.

Signed-off-by: default avatarPetr Machata <petrm@mellanox.com>
Reviewed-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 432e05d3

include/net/netevent.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ enum netevent_notif_type { 
	NETEVENT_DELAY_PROBE_TIME_UPDATE, /* arg is struct neigh_parms ptr */

	NETEVENT_IPV4_MPATH_HASH_UPDATE, /* arg is struct net ptr */

	NETEVENT_IPV6_MPATH_HASH_UPDATE, /* arg is struct net ptr */

	NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE, /* arg is struct net ptr */

};



int register_netevent_notifier(struct notifier_block *nb);

net/ipv4/sysctl_net_ipv4.c

+18 −1
Original line number Diff line number Diff line
@@ -201,6 +201,23 @@ static int ipv4_ping_group_range(struct ctl_table *table, int write, 
	return ret;

}



static int ipv4_fwd_update_priority(struct ctl_table *table, int write,

				    void __user *buffer,

				    size_t *lenp, loff_t *ppos)

{

	struct net *net;

	int ret;



	net = container_of(table->data, struct net,

			   ipv4.sysctl_ip_fwd_update_priority);

	ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);

	if (write && ret == 0)

		call_netevent_notifiers(NETEVENT_IPV4_FWD_UPDATE_PRIORITY_UPDATE,

					net);



	return ret;

}



static int proc_tcp_congestion_control(struct ctl_table *ctl, int write,

				       void __user *buffer, size_t *lenp, loff_t *ppos)

{
@@ -668,7 +685,7 @@ static struct ctl_table ipv4_net_table[] = { 
		.data		= &init_net.ipv4.sysctl_ip_fwd_update_priority,

		.maxlen		= sizeof(int),

		.mode		= 0644,

		.proc_handler   = proc_dointvec_minmax,

		.proc_handler   = ipv4_fwd_update_priority,

		.extra1		= &zero,

		.extra2		= &one,

	},