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Commit e2e62697 authored by Jason Gunthorpe's avatar Jason Gunthorpe Committed by Roland Dreier
Browse files

RDMA/cma: Fix AF_INET6 support in multicast joining 



If joining to an AF_INET6 address, we need to map the address to a MGID
in the same way as the IP stack.  The old code would just fall through to
the IPv4 case and generate garbage.

Signed-off-by: default avatarJason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 1c9b2819

drivers/infiniband/core/cma.c

+5 −0
Original line number Diff line number Diff line
@@ -2691,6 +2691,11 @@ static void cma_set_mgid(struct rdma_id_private *id_priv, 
								 0xFF10A01B)) {

		/* IPv6 address is an SA assigned MGID. */

		memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);

	} else if ((addr->sa_family == AF_INET6)) {

		ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);

		if (id_priv->id.ps == RDMA_PS_UDP)

			mc_map[7] = 0x01;	/* Use RDMA CM signature */

		*mgid = *(union ib_gid *) (mc_map + 4);

	} else {

		ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);

		if (id_priv->id.ps == RDMA_PS_UDP)