Re: [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it

Krzysztof Halasa wrote:

Patrick McHardy <[email protected]> writes:

I think there is one more case that matters, which is briding
from a device with VLAN stripping for a VLAN not configured
locally. The tag will be stripped and will be lost for forwarded
packets.

I think we should drop such packets on RX. Anyway we shouldn't
forward them.

I believe you misunderstand the configuration I was thinking about:

eth0.1000        br0
    |             |
eth0 with VLAN stripping

Its slightly different that I thought though, __vlan_hwaccel_rx
drops packets for unknown vids, so as soon as you configure a VLAN
locally on the same device that is used for a bridge, no VLAN
packets will be forwarded at all.

Slightly inconsistent with how other layered devices work, but
can be avoided by adding the VLAN to br0.

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---

• References:
  • Re: expected behavior of PF_PACKET on NETIF_F_HW_VLAN_RX device?
    • From: Rick Jones <[email protected]>
  • [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it
    • From: "Dave Johnson" <[email protected]>
  • Re: [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it
    • From: Patrick McHardy <[email protected]>
  • Re: [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it
    • From: David Miller <[email protected]>
  • Re: [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it
    • From: Patrick McHardy <[email protected]>
  • Re: [PATCH 1/2] NET: Re-add VLAN tag for devices incapable of keeping it
    • From: Krzysztof Halasa <[email protected]>

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