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[vlan] Support automatic VLAN device creation 

Add the ability to automatically create a VLAN device for a specified
trunk device link-layer address and VLAN tag.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
pull/852/head
Michael Brown 2023-01-15 22:35:44 +00:00
parent 5a2fa6040e
commit f07630c74f
2 changed files with 49 additions and 0 deletions
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1
src/include/ipxe/vlan.h
View File

@ -80,6 +80,7 @@ extern int vlan_can_be_trunk ( struct net_device *trunk );
extern int vlan_create ( struct net_device *trunk, unsigned int tag,
unsigned int priority );
extern int vlan_destroy ( struct net_device *netdev );
extern void vlan_auto ( const void *ll_addr, unsigned int tag );
extern void vlan_netdev_rx ( struct net_device *netdev, unsigned int tag,
struct io_buffer *iobuf );
extern void vlan_netdev_rx_err ( struct net_device *netdev, unsigned int tag,

48
src/net/vlan.c
View File

@ -55,6 +55,12 @@ struct vlan_device {
unsigned int priority;
};
/** Automatic VLAN device link-layer address */
static uint8_t vlan_auto_ll_addr[ETH_ALEN];
/** Automatic VLAN tag */
static unsigned int vlan_auto_tag;
/**
* Open VLAN device
*
@ -447,6 +453,47 @@ int vlan_destroy ( struct net_device *netdev ) {
return 0;
}
/**
* Configure automatic VLAN device
*
* @v ll_addr Link-layer address
* @v tag VLAN tag
*/
void vlan_auto ( const void *ll_addr, unsigned int tag ) {
/* Record link-layer address and VLAN tag */
memcpy ( vlan_auto_ll_addr, ll_addr, ETH_ALEN );
vlan_auto_tag = tag;
}
/**
* Create automatic VLAN device
*
* @v trunk Trunk network device
* @ret rc Return status code
*/
static int vlan_probe ( struct net_device *trunk ) {
int rc;
/* Do nothing unless an automatic VLAN exists */
if ( ! vlan_auto_tag )
return 0;
/* Ignore non-trunk devices */
if ( ! vlan_can_be_trunk ( trunk ) )
return 0;
/* Ignore non-matching link-layer addresses */
if ( memcmp ( trunk->ll_addr, vlan_auto_ll_addr, ETH_ALEN ) != 0 )
return 0;
/* Create automatic VLAN device */
if ( ( rc = vlan_create ( trunk, vlan_auto_tag, 0 ) ) != 0 )
return rc;
return 0;
}
/**
* Handle trunk network device link state change
*
@ -503,6 +550,7 @@ static void vlan_remove ( struct net_device *trunk ) {
/** VLAN driver */
struct net_driver vlan_driver __net_driver = {
.name = "VLAN",
.probe = vlan_probe,
.notify = vlan_notify,
.remove = vlan_remove,
};