linux-kernel - [PATCH 19 of 33] IB/ipath - Discard multicast packets without a GRH

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Date:	Thu, 15 Mar 2007 14:45:03 -0700
From:	Bryan O'Sullivan <bos@...hscale.com>
To:	rdreier@...co.com
Cc:	openib-general@...nfabrics.org, linux-kernel@...r.kernel.org
Subject: [PATCH 19 of 33] IB/ipath - Discard multicast packets without a GRH

# HG changeset patch
# User Bryan O'Sullivan <bos@...hscale.com>
# Date 1173994465 25200
# Node ID c96d13efde155eb60dc0eca0bd56e81ecd36281b
# Parent  878b6054e9ca5327db9c9438f66265afaf88b055
IB/ipath - Discard multicast packets without a GRH

This patch fixes a bug where multicast packets without a GRH
were not being dropped as per the IB spec.

Signed-off-by: Ralph Campbell <ralph.campbell@...gic.com>
Signed-off-by: Bryan O'Sullivan <bryan.osullivan@...gic.com>

diff -r 878b6054e9ca -r c96d13efde15 drivers/infiniband/hw/ipath/ipath_verbs.c
--- a/drivers/infiniband/hw/ipath/ipath_verbs.c	Thu Mar 15 14:34:25 2007 -0700
+++ b/drivers/infiniband/hw/ipath/ipath_verbs.c	Thu Mar 15 14:34:25 2007 -0700
@@ -438,6 +438,10 @@ void ipath_ib_rcv(struct ipath_ibdev *de
 		struct ipath_mcast *mcast;
 		struct ipath_mcast_qp *p;
 
+		if (lnh != IPATH_LRH_GRH) {
+			dev->n_pkt_drops++;
+			goto bail;
+		}
 		mcast = ipath_mcast_find(&hdr->u.l.grh.dgid);
 		if (mcast == NULL) {
 			dev->n_pkt_drops++;
@@ -445,8 +449,7 @@ void ipath_ib_rcv(struct ipath_ibdev *de
 		}
 		dev->n_multicast_rcv++;
 		list_for_each_entry_rcu(p, &mcast->qp_list, list)
-			ipath_qp_rcv(dev, hdr, lnh == IPATH_LRH_GRH, data,
-				     tlen, p->qp);
+			ipath_qp_rcv(dev, hdr, 1, data, tlen, p->qp);
 		/*
 		 * Notify ipath_multicast_detach() if it is waiting for us
 		 * to finish.
-
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