linux/net/8021q
Pedro Garcia ad1afb0039 vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet)
- Without the 8021q module loaded in the kernel, all 802.1p packets 
(VLAN 0 but QoS tagging) are silently discarded (as expected, as 
the protocol is not loaded).
 
- Without this patch in 8021q module, these packets are forwarded to 
the module, but they are discarded also if VLAN 0 is not configured,
which should not be the default behaviour, as VLAN 0 is not really
a VLANed packet but a 802.1p packet. Defining VLAN 0 makes it almost
impossible to communicate with mixed 802.1p and non 802.1p devices on
the same network due to arp table issues.

- Changed logic to skip vlan specific code in vlan_skb_recv if VLAN 
is 0 and we have not defined a VLAN with ID 0, but we accept the 
packet with the encapsulated proto and pass it later to netif_rx.

- In the vlan device event handler, added some logic to add VLAN 0 
to HW filter in devices that support it (this prevented any traffic
in VLAN 0 to reach the stack in e1000e with HW filter under 2.6.35,
and probably also with other HW filtered cards, so we fix it here).

- In the vlan unregister logic, prevent the elimination of VLAN 0 
in devices with HW filter.

- The default behaviour is to ignore the VLAN 0 tagging and accept
the packet as if it was not tagged, but we can still define a 
VLAN 0 if desired (so it is backwards compatible).

Signed-off-by: Pedro Garcia <pedro.netdev@dondevamos.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-07-18 15:38:44 -07:00
..
Kconfig vlan: Add GVRP support 2008-07-05 21:26:57 -07:00
Makefile vlan: uninline __vlan_hwaccel_rx 2008-07-08 03:23:36 -07:00
vlan.c vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet) 2010-07-18 15:38:44 -07:00
vlan.h vlan: 64 bit rx counters 2010-06-28 23:24:31 -07:00
vlan_core.c vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet) 2010-07-18 15:38:44 -07:00
vlan_dev.c vlan_dev: VLAN 0 should be treated as "no vlan tag" (802.1p packet) 2010-07-18 15:38:44 -07:00
vlan_gvrp.c vlan: TCI related type and naming cleanups 2008-07-08 03:24:44 -07:00
vlan_netlink.c vlan: support "loose binding" to the underlying network device 2009-11-26 16:00:36 -08:00
vlanproc.c net: fix 64 bit counters on 32 bit arches 2010-07-07 14:58:56 -07:00
vlanproc.h [VLAN]: Add a net argument to proc init and cleanup calls. 2008-04-16 00:51:12 -07:00