From d0df6d6d4539241179a1ef5394787825bf05bbce Mon Sep 17 00:00:00 2001
From: Roland Dreier <rolandd@cisco.com>
Date: Fri, 22 Sep 2006 15:22:56 -0700
Subject: [PATCH] IPoIB: Create MCGs with all attributes required by RFC
RFC 4391 ("Transmission of IP over InfiniBand (IPoIB)") says:
If the IB multicast group does not already exist, one must be
created first with the IPoIB link MTU. The MGID MUST use the same
P_Key, Q_Key, SL, MTU, and HopLimit as those used in the
broadcast-GID. The rest of attributes SHOULD follow the values used
in the broadcast-GID as well.
However, the current IPoIB driver is only setting the attributes
required by the InfiniBand spec to create a multicast group, so in
particular the MTU and HopLimit are not being set. Add these
attributes when creating MCGs, and also set the Rate attribute, since
IPoIB pays attention to that attribute as well.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
---
.../infiniband/ulp/ipoib/ipoib_multicast.c | 20 ++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index fb3e4875a46d6..3faa1820f0e98 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -472,15 +472,25 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
if (create) {
comp_mask |=
- IB_SA_MCMEMBER_REC_QKEY |
- IB_SA_MCMEMBER_REC_SL |
- IB_SA_MCMEMBER_REC_FLOW_LABEL |
- IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
+ IB_SA_MCMEMBER_REC_QKEY |
+ IB_SA_MCMEMBER_REC_MTU_SELECTOR |
+ IB_SA_MCMEMBER_REC_MTU |
+ IB_SA_MCMEMBER_REC_TRAFFIC_CLASS |
+ IB_SA_MCMEMBER_REC_RATE_SELECTOR |
+ IB_SA_MCMEMBER_REC_RATE |
+ IB_SA_MCMEMBER_REC_SL |
+ IB_SA_MCMEMBER_REC_FLOW_LABEL |
+ IB_SA_MCMEMBER_REC_HOP_LIMIT;
rec.qkey = priv->broadcast->mcmember.qkey;
+ rec.mtu_selector = IB_SA_EQ;
+ rec.mtu = priv->broadcast->mcmember.mtu;
+ rec.traffic_class = priv->broadcast->mcmember.traffic_class;
+ rec.rate_selector = IB_SA_EQ;
+ rec.rate = priv->broadcast->mcmember.rate;
rec.sl = priv->broadcast->mcmember.sl;
rec.flow_label = priv->broadcast->mcmember.flow_label;
- rec.traffic_class = priv->broadcast->mcmember.traffic_class;
+ rec.hop_limit = priv->broadcast->mcmember.hop_limit;
}
init_completion(&mcast->done);
--
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