From d1178cbcdcf91900ccf10a177350d7945703c151 Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Fri, 21 Aug 2015 17:34:13 -0600 Subject: [PATCH] IB/ipoib: Suppress warning for send only join failures We expect send only joins to fail, it just means there are no listeners for the group. The correct thing to do is silently drop the packet at source. Eg avahi will full join 224.0.0.251 which causes a send only IGMP packet to 224.0.0.22, and then a warning level kmessage like this: ib0: sendonly multicast join failed for ff12:401b:ffff:0000:0000:0000:0000:0016, status -22 If there is no IP router listening to IGMP. Signed-off-by: Jason Gunthorpe Signed-off-by: Doug Ledford --- drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index 5e2db3b7c8bb..09a1748f9d13 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -393,8 +393,13 @@ static int ipoib_mcast_join_complete(int status, goto out_locked; } } else { - if (mcast->logcount++ < 20) { - if (status == -ETIMEDOUT || status == -EAGAIN) { + bool silent_fail = + test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && + status == -EINVAL; + + if (mcast->logcount < 20) { + if (status == -ETIMEDOUT || status == -EAGAIN || + silent_fail) { ipoib_dbg_mcast(priv, "%smulticast join failed for %pI6, status %d\n", test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", mcast->mcmember.mgid.raw, status); @@ -403,6 +408,9 @@ static int ipoib_mcast_join_complete(int status, test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) ? "sendonly " : "", mcast->mcmember.mgid.raw, status); } + + if (!silent_fail) + mcast->logcount++; } if (test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags) && -- 2.20.1