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[vlan] Provide vlan_netdev_rx() and vlan_netdev_rx_err()

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The Hermon driver uses vlan_find() to identify the appropriate VLAN
device for packets that are received with the VLAN tag already
stripped out by the hardware.  Generalise this capability and expose
it for use by other network card drivers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2019-04-27 20:12:01 +01:00
parent afee77d816
commit fe680c8228
4 changed files with 84 additions and 21 deletions
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34
src/net/netdevice.c
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@@ -1126,15 +1126,35 @@ __weak unsigned int vlan_tag ( struct net_device *netdev __unused ) {
}
/**
* Identify VLAN device (when VLAN support is not present)
* Add VLAN tag-stripped packet to queue (when VLAN support is not present)
*
* @v trunk Trunk network device
* @v tag VLAN tag
* @ret netdev VLAN device, if any
* @v netdev Network device
* @v tag VLAN tag, or zero
* @v iobuf I/O buffer
*/
__weak struct net_device * vlan_find ( struct net_device *trunk __unused,
unsigned int tag __unused ) {
return NULL;
__weak void vlan_netdev_rx ( struct net_device *netdev, unsigned int tag,
struct io_buffer *iobuf ) {
if ( tag == 0 ) {
netdev_rx ( netdev, iobuf );
} else {
netdev_rx_err ( netdev, iobuf, -ENODEV );
}
}
/**
* Discard received VLAN tag-stripped packet (when VLAN support is not present)
*
* @v netdev Network device
* @v tag VLAN tag, or zero
* @v iobuf I/O buffer, or NULL
* @v rc Packet status code
*/
__weak void vlan_netdev_rx_err ( struct net_device *netdev,
unsigned int tag __unused,
struct io_buffer *iobuf, int rc ) {
netdev_rx_err ( netdev, iobuf, rc );
}
/** Networking stack process */