All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jarod Wilson <jarod@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Jarod Wilson <jarod@redhat.com>,
	Jay Vosburgh <j.vosburgh@gmail.com>,
	Veaceslav Falico <vfalico@gmail.com>,
	Andy Gospodarek <andy@greyhouse.net>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Thomas Davis <tadavis@lbl.gov>,
	netdev@vger.kernel.org
Subject: [PATCH 3/4] bond_alb: don't tx balance multicast traffic either
Date: Tue, 18 May 2021 17:08:48 -0400	[thread overview]
Message-ID: <20210518210849.1673577-4-jarod@redhat.com> (raw)
In-Reply-To: <20210518210849.1673577-1-jarod@redhat.com>

Multicast traffic going out the non-primary interface can come back in
through the primary interface in alb mode. When there's a bridge sitting
on top of the bond, with virtual machines behind it, attached to vnetX
interfaces also acting as bridge ports, this can cause problems. The
multicast traffic ends up rewriting the bridge forwarding database
entries, replacing a vnetX entry in the fdb with the bond instead, at
which point, we lose traffic. If we don't tx balance multicast traffic, we
don't break connectivity.

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Thomas Davis <tadavis@lbl.gov>
Cc: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
---
 drivers/net/bonding/bond_alb.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index ce8257c7cbea..4df661b77252 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -1422,6 +1422,7 @@ struct slave *bond_xmit_alb_slave_get(struct bonding *bond,
 		const struct iphdr *iph;
 
 		if (is_broadcast_ether_addr(eth_data->h_dest) ||
+		    is_multicast_ether_addr(eth_data->h_dest) ||
 		    !pskb_network_may_pull(skb, sizeof(*iph))) {
 			do_tx_balance = false;
 			break;
@@ -1441,7 +1442,8 @@ struct slave *bond_xmit_alb_slave_get(struct bonding *bond,
 		/* IPv6 doesn't really use broadcast mac address, but leave
 		 * that here just in case.
 		 */
-		if (is_broadcast_ether_addr(eth_data->h_dest)) {
+		if (is_broadcast_ether_addr(eth_data->h_dest) ||
+		    is_multicast_ether_addr(eth_data->h_dest)) {
 			do_tx_balance = false;
 			break;
 		}
-- 
2.30.2


  parent reply	other threads:[~2021-05-18 21:09 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-18 21:08 [PATCH 0/4] bond_alb: support VMs behind bridges better Jarod Wilson
2021-05-18 21:08 ` [PATCH 1/4] bonding: add pure source-mac-based tx hashing option Jarod Wilson
2021-05-19  9:01   ` Nikolay Aleksandrov
2021-05-18 21:08 ` [PATCH 2/4] bond_alb: don't rewrite bridged non-local MACs Jarod Wilson
2021-05-19 22:31   ` Jay Vosburgh
2021-05-18 21:08 ` Jarod Wilson [this message]
2021-05-19 18:45   ` [PATCH 3/4] bond_alb: don't tx balance multicast traffic either Jay Vosburgh
2021-05-18 21:08 ` [PATCH 4/4] bond_alb: put all slaves into promisc Jarod Wilson
2021-05-19 16:47   ` Jay Vosburgh
2021-05-21 13:27 ` [PATCH net-next v2 0/4] bonding/balance-alb: support VMs behind bridges better Jarod Wilson
2021-05-21 13:27   ` [PATCH net-next v2 1/4] bonding: add pure source-mac-based tx hashing option Jarod Wilson
2021-05-21 13:39     ` Nikolay Aleksandrov
2021-05-21 13:41       ` Nikolay Aleksandrov
2021-05-21 18:01       ` Jay Vosburgh
2021-05-21 13:27   ` [PATCH net-next v2 2/4] bonding/balance-lb: don't rewrite bridged non-local MACs Jarod Wilson
2021-05-21 17:58     ` Jay Vosburgh
2021-05-21 13:27   ` [PATCH net-next v2 3/4] bonding/balance-alb: don't tx balance multicast traffic either Jarod Wilson
2021-05-21 17:02     ` Jay Vosburgh
2021-05-21 13:27   ` [PATCH net-next v2 4/4] bonding/balance-alb: put all slaves into promisc Jarod Wilson
2021-05-21 17:01     ` Jay Vosburgh

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210518210849.1673577-4-jarod@redhat.com \
    --to=jarod@redhat.com \
    --cc=andy@greyhouse.net \
    --cc=davem@davemloft.net \
    --cc=j.vosburgh@gmail.com \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=tadavis@lbl.gov \
    --cc=vfalico@gmail.com \
    --subject='Re: [PATCH 3/4] bond_alb: don'\''t tx balance multicast traffic either' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.