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Commit 935ef2d7 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
Browse files

RDMA/cma: Use neigh_event_send() to start neighbour discovery 



Calling arp_send() to initiate neighbour discovery (ND) doesn't do the
full ND protocol.  Namely, it doesn't handle retransmitting the arp
request if it is dropped. The function neigh_event_send() does all
this.  Without doing full ND, RDMA address resolution fails in the
presence of dropped ARP broadcast packets.

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Acked-by: default avatarSean Hefty <sean.hefty@intel.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 3a31c419

drivers/infiniband/core/addr.c

+1 −2
Original line number Diff line number Diff line
@@ -161,8 +161,7 @@ static void addr_send_arp(struct sockaddr_in *dst_in) 
	if (ip_route_output_key(&rt, &fl))

		return;



	arp_send(ARPOP_REQUEST, ETH_P_ARP, rt->rt_gateway, rt->idev->dev,

		 rt->rt_src, NULL, rt->idev->dev->dev_addr, NULL);

	neigh_event_send(rt->u.dst.neighbour, NULL);

	ip_rt_put(rt);

}