Commit 10651db7 authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

qeth: tagging with VLAN-ID 0 



This patch adapts qeth to handle tagged frames with VLAN-ID 0 and
with or without priority information in the tag. It enables qeth to
receive priority-tagged frames on a base interface, for example from
z/OS, without configuring an additional VLAN interface.

Signed-off-by: default avatarUrsula Braun <ursula.braun@de.ibm.com>
Signed-off-by: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a069ec91

drivers/s390/net/qeth_l2_main.c

+2 −0
Original line number Diff line number Diff line
@@ -310,6 +310,8 @@ static void qeth_l2_vlan_rx_add_vid(struct net_device *dev, unsigned short vid) 
	struct qeth_vlan_vid *id;



	QETH_CARD_TEXT_(card, 4, "aid:%d", vid);

	if (!vid)

		return;

	if (card->info.type == QETH_CARD_TYPE_OSM) {

		QETH_CARD_TEXT(card, 3, "aidOSM");

		return;

drivers/s390/net/qeth_l3_main.c

+13 −14
Original line number Diff line number Diff line
@@ -2013,13 +2013,14 @@ static void qeth_l3_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) 
	qeth_l3_set_multicast_list(card->dev);

}



static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card,

			struct sk_buff *skb, struct qeth_hdr *hdr)

static inline int qeth_l3_rebuild_skb(struct qeth_card *card,

			struct sk_buff *skb, struct qeth_hdr *hdr,

			unsigned short *vlan_id)

{

	unsigned short vlan_id = 0;

	__be16 prot;

	struct iphdr *ip_hdr;

	unsigned char tg_addr[MAX_ADDR_LEN];

	int is_vlan = 0;



	if (!(hdr->hdr.l3.flags & QETH_HDR_PASSTHRU)) {

		prot = htons((hdr->hdr.l3.flags & QETH_HDR_IPV6)? ETH_P_IPV6 :
@@ -2082,8 +2083,9 @@ static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card, 


	if (hdr->hdr.l3.ext_flags &

	    (QETH_HDR_EXT_VLAN_FRAME | QETH_HDR_EXT_INCLUDE_VLAN_TAG)) {

		vlan_id = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME)?

		*vlan_id = (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_VLAN_FRAME) ?

		 hdr->hdr.l3.vlan_id : *((u16 *)&hdr->hdr.l3.dest_addr[12]);

		is_vlan = 1;

	}



	switch (card->options.checksum_type) {
@@ -2104,7 +2106,7 @@ static inline __u16 qeth_l3_rebuild_skb(struct qeth_card *card, 
			skb->ip_summed = CHECKSUM_NONE;

	}



	return vlan_id;

	return is_vlan;

}



static int qeth_l3_process_inbound_buffer(struct qeth_card *card,
@@ -2114,6 +2116,7 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card, 
	struct sk_buff *skb;

	struct qeth_hdr *hdr;

	__u16 vlan_tag = 0;

	int is_vlan;

	unsigned int len;



	*done = 0;
@@ -2129,16 +2132,12 @@ static int qeth_l3_process_inbound_buffer(struct qeth_card *card, 
		skb->dev = card->dev;

		switch (hdr->hdr.l3.id) {

		case QETH_HEADER_TYPE_LAYER3:

			vlan_tag = qeth_l3_rebuild_skb(card, skb, hdr);

			is_vlan = qeth_l3_rebuild_skb(card, skb, hdr,

						      &vlan_tag);

			len = skb->len;

			if (vlan_tag && !card->options.sniffer)

				if (card->vlangrp)

					vlan_gro_receive(&card->napi,

						card->vlangrp, vlan_tag, skb);

				else {

					dev_kfree_skb_any(skb);

					continue;

				}

			if (is_vlan && !card->options.sniffer)

				vlan_gro_receive(&card->napi, card->vlangrp,

					vlan_tag, skb);

			else

				napi_gro_receive(&card->napi, skb);

			break;

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