Commit c7c0bbea authored Sep 27, 2017 by Yotam Gigi Committed by David S. Miller Sep 27, 2017

net: ipmr: Add MFC offload indication



Allow drivers, registered to the fib notification chain indicate whether a
multicast MFC route is offloaded or not, similarly to unicast routes. The
indication of whether a route is offloaded is done using the mfc_flags
field on an mfc_cache struct, and the information is sent to the userspace
via the RTNetlink interface only.

Currently, MFC routes are either offloaded or not, thus there is no need to
add per-VIF offload indication.

Signed-off-by: Yotam Gigi <yotamg@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent b362053a

include/linux/mroute.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -90,9 +90,11 @@ struct mr_table {

		/* mfc_flags:
		* MFC_STATIC - the entry was added statically (not by a routing daemon)
		* MFC_OFFLOAD - the entry was offloaded to the hardware
		*/
		enum {
		MFC_STATIC = BIT(0),
		MFC_OFFLOAD = BIT(1),
		};

		struct mfc_cache_cmp_arg {

net/ipv4/ipmr.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -2268,6 +2268,9 @@ static int __ipmr_fill_mroute(struct mr_table mrt, struct sk_buff skb,
		nla_put_u32(skb, RTA_IIF, mrt->vif_table[c->mfc_parent].dev->ifindex) < 0)
		return -EMSGSIZE;

		if (c->mfc_flags & MFC_OFFLOAD)
		rtm->rtm_flags \|= RTNH_F_OFFLOAD;

		if (!(mp_attr = nla_nest_start(skb, RTA_MULTIPATH)))
		return -EMSGSIZE;