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Commit 9636a56f authored by Noa Osherovich's avatar Noa Osherovich Committed by Doug Ledford
Browse files

IB/core: Add support for RoCEv2 multicast 



When creating address handle from multicast GID, set MAC according to
the appropriate formula instead of searching for it in the GID table:
- For IPv4 multicast GID use ip_eth_mc_map().
- For IPv6 multicast GID use ipv6_eth_mc_map().

Signed-off-by: default avatarNoa Osherovich <noaos@mellanox.com>
Reviewed-by: default avatarMoni Shoua <monis@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent be1d325a

drivers/infiniband/core/verbs.c

+12 −0
Original line number Diff line number Diff line
@@ -1244,6 +1244,18 @@ int ib_resolve_eth_dmac(struct ib_device *device, 
	if (rdma_link_local_addr((struct in6_addr *)grh->dgid.raw)) {

		rdma_get_ll_mac((struct in6_addr *)grh->dgid.raw,

				ah_attr->roce.dmac);

		return 0;

	}

	if (rdma_is_multicast_addr((struct in6_addr *)ah_attr->grh.dgid.raw)) {

		if (ipv6_addr_v4mapped((struct in6_addr *)ah_attr->grh.dgid.raw)) {

			__be32 addr = 0;



			memcpy(&addr, ah_attr->grh.dgid.raw + 12, 4);

			ip_eth_mc_map(addr, (char *)ah_attr->roce.dmac);

		} else {

			ipv6_eth_mc_map((struct in6_addr *)ah_attr->grh.dgid.raw,

					(char *)ah_attr->roce.dmac);

		}

	} else {

		union ib_gid		sgid;

		struct ib_gid_attr	sgid_attr;