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Commit 396cf943 authored by Pravin B Shelar's avatar Pravin B Shelar Committed by Jesse Gross
Browse files

vlan: Move vlan_set_encap_proto() to vlan header file 



Open vSwitch needs this function for vlan handling.

Signed-off-by: default avatarPravin B Shelar <pshelar@nicira.com>
Signed-off-by: default avatarJesse Gross <jesse@nicira.com>
parent b4e16611

include/linux/if_vlan.h

+34 −0
Original line number Diff line number Diff line
@@ -310,6 +310,40 @@ static inline __be16 vlan_get_protocol(const struct sk_buff *skb) 


	return protocol;

}



static inline void vlan_set_encap_proto(struct sk_buff *skb,

					struct vlan_hdr *vhdr)

{

	__be16 proto;

	unsigned char *rawp;



	/*

	 * Was a VLAN packet, grab the encapsulated protocol, which the layer

	 * three protocols care about.

	 */



	proto = vhdr->h_vlan_encapsulated_proto;

	if (ntohs(proto) >= 1536) {

		skb->protocol = proto;

		return;

	}



	rawp = skb->data;

	if (*(unsigned short *) rawp == 0xFFFF)

		/*

		 * This is a magic hack to spot IPX packets. Older Novell

		 * breaks the protocol design and runs IPX over 802.3 without

		 * an 802.2 LLC layer. We look for FFFF which isn't a used

		 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware

		 * but does for the rest.

		 */

		skb->protocol = htons(ETH_P_802_3);

	else

		/*

		 * Real 802.2 LLC

		 */

		skb->protocol = htons(ETH_P_802_2);

}

#endif /* __KERNEL__ */



/* VLAN IOCTLs are found in sockios.h */

net/8021q/vlan_core.c

+0 −33
Original line number Diff line number Diff line
@@ -110,39 +110,6 @@ static struct sk_buff *vlan_reorder_header(struct sk_buff *skb) 
	return skb;

}



static void vlan_set_encap_proto(struct sk_buff *skb, struct vlan_hdr *vhdr)

{

	__be16 proto;

	unsigned char *rawp;



	/*

	 * Was a VLAN packet, grab the encapsulated protocol, which the layer

	 * three protocols care about.

	 */



	proto = vhdr->h_vlan_encapsulated_proto;

	if (ntohs(proto) >= 1536) {

		skb->protocol = proto;

		return;

	}



	rawp = skb->data;

	if (*(unsigned short *) rawp == 0xFFFF)

		/*

		 * This is a magic hack to spot IPX packets. Older Novell

		 * breaks the protocol design and runs IPX over 802.3 without

		 * an 802.2 LLC layer. We look for FFFF which isn't a used

		 * 802.2 SSAP/DSAP. This won't work for fault tolerant netware

		 * but does for the rest.

		 */

		skb->protocol = htons(ETH_P_802_3);

	else

		/*

		 * Real 802.2 LLC

		 */

		skb->protocol = htons(ETH_P_802_2);

}



struct sk_buff *vlan_untag(struct sk_buff *skb)

{

	struct vlan_hdr *vhdr;