Commit c82481f7 authored Jun 18, 2019 by Ido Schimmel Committed by David S. Miller Jun 18, 2019

netlink: Add field to skip in-kernel notifications



The struct includes a 'skip_notify' flag that indicates if netlink
notifications to user space should be suppressed. As explained in commit
3b1137fe ("net: ipv6: Change notifications for multipath add to
RTA_MULTIPATH"), this is useful to suppress per-nexthop RTM_NEWROUTE
notifications when an IPv6 multipath route is added / deleted. Instead,
one notification is sent for the entire multipath route.

This concept is also useful for in-kernel notifications. Sending one
in-kernel notification for the addition / deletion of an IPv6 multipath
route - instead of one per-nexthop - provides a significant increase in
the insertion / deletion rate to underlying devices.

Add a 'skip_notify_kernel' flag to suppress in-kernel notifications.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 3de205cd

include/net/netlink.h

+3 −1

Original line number	Diff line number	Diff line
		@@ -381,12 +381,14 @@ struct nla_policy {
		* @nl_net: Network namespace
		* @portid: Netlink PORTID of requesting application
		* @skip_notify: Skip netlink notifications to user space
		* @skip_notify_kernel: Skip selected in-kernel notifications
		*/
		struct nl_info {
		struct nlmsghdr *nlh;
		struct net *nl_net;
		u32 portid;
		bool skip_notify;
		u8 skip_notify:1,
		skip_notify_kernel:1;
		};

		/**

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