On Tue, Nov 11, 2014 at 09:21:30AM +0100, Michal Kubecek wrote:
Large receive offloading is known to cause problems if received packets
are passed to other host. Therefore the kernel disables it by calling
dev_disable_lro() whenever a network device is enslaved in a bridge or
forwarding is enabled for it (or globally). For virtual devices we need
to disable LRO on the underlying physical device (which is actually
receiving the packets).
Current dev_disable_lro() code handles this propagation for a vlan
(including 802.1ad nested vlan), macvlan or a vlan on top of a macvlan.
This patch adds LRO disabling propagation for
- macvlan on top of a vlan or any stacked combination of those
- bonding
- teaming
All of these drivers use the netdev_upper and friends, so why not make it
generic with netdev_for_each_all_lower() in dev_disable_lro()?
In the bonding and teaming case, it is necessary to disable LRO not only
on slaves when dev_disable_lro() is called but also on any slave (port)
added later.
Michal Kubecek (3):
net: handle more general stacking in dev_disable_lro()
team: add helper to check if device is a team master
net: propagate LRO disabling to bond and team slaves
drivers/net/bonding/bond_main.c | 3 +++
drivers/net/team/team.c | 6 +++++-
include/linux/netdevice.h | 7 +++++++
net/core/dev.c | 31 ++++++++++++++++++++++---------
4 files changed, 37 insertions(+), 10 deletions(-)
--
1.8.4.5
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