This is a note to let you know that I've just added the patch titled
Revert "macvlan : fix checksums error when we are in bridge mode"
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-macvlan-fix-checksums-error-when-we-are-in-bridge-mode.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed May 28 20:24:34 PDT 2014
From: Vlad Yasevich <vyasevic@xxxxxxxxxx>
Date: Tue, 29 Apr 2014 10:09:51 -0400
Subject: Revert "macvlan : fix checksums error when we are in bridge mode"
From: Vlad Yasevich <vyasevic@xxxxxxxxxx>
[ Upstream commit f114890cdf84d753f6b41cd0cc44ba51d16313da ]
This reverts commit 12a2856b604476c27d85a5f9a57ae1661fc46019.
The commit above doesn't appear to be necessary any more as the
checksums appear to be correctly computed/validated.
Additionally the above commit breaks kvm configurations where
one VM is using a device that support checksum offload (virtio) and
the other VM does not.
In this case, packets leaving virtio device will have CHECKSUM_PARTIAL
set. The packets is forwarded to a macvtap that has offload features
turned off. Since we use CHECKSUM_UNNECESSARY, the host does does not
update the checksum and thus a bad checksum is passed up to
the guest.
CC: Daniel Lezcano <daniel.lezcano@xxxxxxx>
CC: Patrick McHardy <kaber@xxxxxxxxx>
CC: Andrian Nord <nightnord@xxxxxxxxx>
CC: Eric Dumazet <eric.dumazet@xxxxxxxxx>
CC: Michael S. Tsirkin <mst@xxxxxxxxxx>
CC: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Vlad Yasevich <vyasevic@xxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/macvlan.c | 3 ---
1 file changed, 3 deletions(-)
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -237,11 +237,9 @@ static int macvlan_queue_xmit(struct sk_
const struct macvlan_dev *vlan = netdev_priv(dev);
const struct macvlan_port *port = vlan->port;
const struct macvlan_dev *dest;
- __u8 ip_summed = skb->ip_summed;
if (vlan->mode == MACVLAN_MODE_BRIDGE) {
const struct ethhdr *eth = (void *)skb->data;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
/* send to other bridge ports directly */
if (is_multicast_ether_addr(eth->h_dest)) {
@@ -259,7 +257,6 @@ static int macvlan_queue_xmit(struct sk_
}
xmit_world:
- skb->ip_summed = ip_summed;
skb->dev = vlan->lowerdev;
return dev_queue_xmit(skb);
}
Patches currently in stable-queue which might be from vyasevic@xxxxxxxxxx are
queue-3.4/revert-macvlan-fix-checksums-error-when-we-are-in-bridge-mode.patch
queue-3.4/net-sctp-test-if-association-is-dead-in-sctp_wake_up_waiters.patch
queue-3.4/net-sctp-wake-up-all-assocs-if-sndbuf-policy-is-per-socket.patch
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