diff options
| author | Ursula Braun <ursula.braun@de.ibm.com> | 2010-10-01 02:51:13 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-10-03 22:08:42 -0700 |
| commit | 10651db75a94c54a34bbf85fbee334d1114da3fb (patch) | |
| tree | 79a641d41ffd541635997fd1bdda9715930b8841 /drivers/s390/net/qeth_l3_main.c | |
| parent | a069ec917457e44e214fc34e50acd185110fa81b (diff) | |
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/qeth_l3_main.c')
| -rw-r--r-- | drivers/s390/net/qeth_l3_main.c | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index 5b79f573bd93..c094707fcbff 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; |