aboutsummaryrefslogtreecommitdiff
path: root/drivers/s390/net
diff options
context:
space:
mode:
authorUrsula Braun <ursula.braun@de.ibm.com>2010-10-01 02:51:13 +0000
committerDavid S. Miller <davem@davemloft.net>2010-10-03 22:08:42 -0700
commit10651db75a94c54a34bbf85fbee334d1114da3fb (patch)
tree79a641d41ffd541635997fd1bdda9715930b8841 /drivers/s390/net
parenta069ec917457e44e214fc34e50acd185110fa81b (diff)
downloadlinux-linaro-android-10651db75a94c54a34bbf85fbee334d1114da3fb.tar.gz
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: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net')
-rw-r--r--drivers/s390/net/qeth_l2_main.c2
-rw-r--r--drivers/s390/net/qeth_l3_main.c27
2 files changed, 15 insertions, 14 deletions
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 01c3c1f7787..847e8797073 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -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;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index 5b79f573bd9..c094707fcbf 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -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;