netdev - Re: How does vlan driver pass vlan info to the h/w ethernet driver

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Date:   Mon, 01 May 2017 10:57:36 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     heyen2000@...il.com
Cc:     andrew@...n.ch, netdev@...r.kernel.org
Subject: Re: How does vlan driver pass vlan info to the h/w ethernet driver

From: carl h <heyen2000@...il.com>
Date: Mon, 1 May 2017 10:52:17 -0400

> But i can't see how the vlan info propagates down to the switch driver.

Which "VLAN info" are you talking about?

The VLANs configured onto the device itself or the per-packet VLAN
info.

Per-device VLAN configuration is communicated to the netdev driver
via netdev_ops->ndo_vlan_{add,kill}_vid().

Per-packet VLAN information is stored in skb->vlan_{proto,tci}.