Re: openvswitch MTU patch needed in 4.10 stable

[David Miller]

From: Stephen Hemminger 
Date: Tue, 9 May 2017 08:46:56 -0700

> Could you queue the patch to stable?

It speeds things along if you actually specify the SHA1 ID of the
specific commit being requested for a -stable backport.

I did this work, but you could have taken a brief amount of time so
that this would not have been necessary.

Thanks.

openvswitch MTU patch needed in 4.10 stable

[Stephen Hemminger]

Could you queue the patch to stable?

Begin forwarded message:

Date: Tue, 09 May 2017 08:21:46 +
From: bugzilla-dae...@bugzilla.kernel.org
To: step...@networkplumber.org
Subject: [Bug 195695] New: openvswitch: Set internal device max mtu to 
ETH_MAX_MTU


https://bugzilla.kernel.org/show_bug.cgi?id=195695

Bug ID: 195695
   Summary: openvswitch: Set internal device max mtu to
ETH_MAX_MTU
   Product: Networking
   Version: 2.5
Kernel Version: 4.10
  Hardware: All
OS: Linux
  Tree: Mainline
Status: NEW
  Severity: normal
  Priority: P1
 Component: Other
  Assignee: step...@networkplumber.org
  Reporter: en...@basis-consulting.com
Regression: No

Can not use jumbo frames with openvswitch bridge in kernel 4.10. This is fixed
in kernel 4.11:

Commit 91572088e3fd ("net: use core MTU range checking in core net
infra") changed the openvswitch internal device to use the core net
infra for controlling the MTU range, but failed to actually set the
max_mtu as described in the commit message, which now defaults to
ETH_DATA_LEN.

This patch fixes this by setting max_mtu to ETH_MAX_MTU after
ether_setup() call.

Fixes: 91572088e3fd ("net: use core MTU range checking in core net infra")
Signed-off-by: Jarno Rajahalme 
Signed-off-by: David S. Miller 

Diffstat (limited to 'net/openvswitch/vport-internal_dev.c')
-rw-r--r--
net/openvswitch/vport-internal_dev.c
2



1 files changed, 2 insertions, 0 deletions
diff --git a/net/openvswitch/vport-internal_dev.c
b/net/openvswitch/vport-internal_dev.c
index 09141a1..89193a6 100644
--- a/net/openvswitch/vport-internal_dev.c
+++ b/net/openvswitch/vport-internal_dev.c
@@ -149,6 +149,8 @@ static void do_setup(struct net_device *netdev)
 {
ether_setup(netdev);

+   netdev->max_mtu = ETH_MAX_MTU;
+
netdev->netdev_ops = _dev_netdev_ops;

netdev->priv_flags &= ~IFF_TX_SKB_SHARING;

Br.
Endre Vaade

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