When the MAC address is not provided by the vdpa device virtio_net
driver assigns a random one without notifying the device.
The consequence, in the case of mlx5_vdpa, is the internal routing
tables of the device are not updated and this can block the
communication between two namespaces.
To fix this problem, use virtnet_send_command(VIRTIO_NET_CTRL_MAC)
to set the address from virtnet_probe() when the MAC address is
not provided by the device.
v3:
- update comments
- fail probe if VIRTIO_NET_CTRL_MAC_ADDR_SET fails
- move the virtnet_send_command() upper, inside the RTNL lock,
this simplifies the cleanup in case of error, and a future patch
from Jason adds an ASSERT_RTNL() in virtnet_send_command()
("virtio-net: convert rx mode setting to use workqueue")
- add a patch to disable F_STANDBY if F_MAC is not set
v2:
- remove vdpa_sim related fixes
- check virtio_has_feature(vdev, VIRTIO_NET_F_MAC) rather than
addr_assign_type
Laurent Vivier (2):
virtio_net: disable VIRTIO_NET_F_STANDBY if VIRTIO_NET_F_MAC is not
set
virtio_net: notify MAC address change on device initialization
drivers/net/virtio_net.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
--
2.39.1
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