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Commit e23dd9cd authored by Frank Pavlic's avatar Frank Pavlic Committed by Jeff Garzik
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[PATCH] s390: fakell for high speed token ring 

[patch 8/10] s390: fakell for high speed token ring.

From: Michael Holzheu <holzheu@de.ibm.com>

Implement fake-link-layer for high speed token ring. Without it
token ring packages get leading ethernet headers, which confuses
dhcp.
Signed-off-by: default avatarFrank Pavlic <pavlic@de.ibm.com>
parent d801145d
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Showing with 114 additions and 27 deletions
drivers/s390/net/qeth.h
View file @ e23dd9cd
......@@ -24,7 +24,7 @@
#include "qeth_mpc.h"
#define VERSION_QETH_H "$Revision: 1.136 $"
#define VERSION_QETH_H "$Revision: 1.137 $"
#ifdef CONFIG_QETH_IPV6
#define QETH_VERSION_IPV6 ":IPv6"
......@@ -288,7 +288,8 @@ qeth_is_ipa_enabled(struct qeth_ipa_info *ipa, enum qeth_ipa_funcs func)
#define QETH_TX_TIMEOUT 100 * HZ
#define QETH_HEADER_SIZE 32
#define MAX_PORTNO 15
#define QETH_FAKE_LL_LEN ETH_HLEN
#define QETH_FAKE_LL_LEN_ETH ETH_HLEN
#define QETH_FAKE_LL_LEN_TR (sizeof(struct trh_hdr)-TR_MAXRIFLEN+sizeof(struct trllc))
#define QETH_FAKE_LL_V6_ADDR_POS 24
/*IPv6 address autoconfiguration stuff*/
......
drivers/s390/net/qeth_main.c
View file @ e23dd9cd
/*
*
* linux/drivers/s390/net/qeth_main.c ($Revision: 1.207 $)
* linux/drivers/s390/net/qeth_main.c ($Revision: 1.209 $)
*
* Linux on zSeries OSA Express and HiperSockets support
*
......@@ -12,7 +12,7 @@
* Frank Pavlic (pavlic@de.ibm.com) and
* Thomas Spatzier <tspat@de.ibm.com>
*
* $Revision: 1.207 $ $Date: 2005/04/01 21:40:40 $
* $Revision: 1.209 $ $Date: 2005/04/18 11:58:48 $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -80,7 +80,7 @@ qeth_eyecatcher(void)
#include "qeth_eddp.h"
#include "qeth_tso.h"
#define VERSION_QETH_C "$Revision: 1.207 $"
#define VERSION_QETH_C "$Revision: 1.209 $"
static const char *version = "qeth S/390 OSA-Express driver";
/**
......@@ -2152,9 +2152,15 @@ qeth_get_next_skb(struct qeth_card *card, struct qdio_buffer *buffer,
if (!skb_len)
return NULL;
if (card->options.fake_ll){
if (!(skb = qeth_get_skb(skb_len + QETH_FAKE_LL_LEN)))
goto no_mem;
skb_pull(skb, QETH_FAKE_LL_LEN);
if(card->dev->type == ARPHRD_IEEE802_TR){
if (!(skb = qeth_get_skb(skb_len+QETH_FAKE_LL_LEN_TR)))
goto no_mem;
skb_reserve(skb,QETH_FAKE_LL_LEN_TR);
} else {
if (!(skb = qeth_get_skb(skb_len+QETH_FAKE_LL_LEN_ETH)))
goto no_mem;
skb_reserve(skb,QETH_FAKE_LL_LEN_ETH);
}
} else if (!(skb = qeth_get_skb(skb_len)))
goto no_mem;
data_ptr = element->addr + offset;
......@@ -2229,14 +2235,68 @@ qeth_type_trans(struct sk_buff *skb, struct net_device *dev)
}
static inline void
qeth_rebuild_skb_fake_ll(struct qeth_card *card, struct sk_buff *skb,
qeth_rebuild_skb_fake_ll_tr(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
struct trh_hdr *fake_hdr;
struct trllc *fake_llc;
struct iphdr *ip_hdr;
QETH_DBF_TEXT(trace,5,"skbfktr");
skb->mac.raw = skb->data - QETH_FAKE_LL_LEN_TR;
/* this is a fake ethernet header */
fake_hdr = (struct trh_hdr *) skb->mac.raw;
/* the destination MAC address */
switch (skb->pkt_type){
case PACKET_MULTICAST:
switch (skb->protocol){
#ifdef CONFIG_QETH_IPV6
case __constant_htons(ETH_P_IPV6):
ndisc_mc_map((struct in6_addr *)
skb->data + QETH_FAKE_LL_V6_ADDR_POS,
fake_hdr->daddr, card->dev, 0);
break;
#endif /* CONFIG_QETH_IPV6 */
case __constant_htons(ETH_P_IP):
ip_hdr = (struct iphdr *)skb->data;
ip_tr_mc_map(ip_hdr->daddr, fake_hdr->daddr);
break;
default:
memcpy(fake_hdr->daddr, card->dev->dev_addr, TR_ALEN);
}
break;
case PACKET_BROADCAST:
memset(fake_hdr->daddr, 0xff, TR_ALEN);
break;
default:
memcpy(fake_hdr->daddr, card->dev->dev_addr, TR_ALEN);
}
/* the source MAC address */
if (hdr->hdr.l3.ext_flags & QETH_HDR_EXT_SRC_MAC_ADDR)
memcpy(fake_hdr->saddr, &hdr->hdr.l3.dest_addr[2], TR_ALEN);
else
memset(fake_hdr->saddr, 0, TR_ALEN);
fake_hdr->rcf=0;
fake_llc = (struct trllc*)&(fake_hdr->rcf);
fake_llc->dsap = EXTENDED_SAP;
fake_llc->ssap = EXTENDED_SAP;
fake_llc->llc = UI_CMD;
fake_llc->protid[0] = 0;
fake_llc->protid[1] = 0;
fake_llc->protid[2] = 0;
fake_llc->ethertype = ETH_P_IP;
}
static inline void
qeth_rebuild_skb_fake_ll_eth(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
struct ethhdr *fake_hdr;
struct iphdr *ip_hdr;
QETH_DBF_TEXT(trace,5,"skbfake");
skb->mac.raw = skb->data - QETH_FAKE_LL_LEN;
QETH_DBF_TEXT(trace,5,"skbfketh");
skb->mac.raw = skb->data - QETH_FAKE_LL_LEN_ETH;
/* this is a fake ethernet header */
fake_hdr = (struct ethhdr *) skb->mac.raw;
......@@ -2253,10 +2313,7 @@ qeth_rebuild_skb_fake_ll(struct qeth_card *card, struct sk_buff *skb,
#endif /* CONFIG_QETH_IPV6 */
case __constant_htons(ETH_P_IP):
ip_hdr = (struct iphdr *)skb->data;
if (card->dev->type == ARPHRD_IEEE802_TR)
ip_tr_mc_map(ip_hdr->daddr, fake_hdr->h_dest);
else
ip_eth_mc_map(ip_hdr->daddr, fake_hdr->h_dest);
ip_eth_mc_map(ip_hdr->daddr, fake_hdr->h_dest);
break;
default:
memcpy(fake_hdr->h_dest, card->dev->dev_addr, ETH_ALEN);
......@@ -2277,6 +2334,16 @@ qeth_rebuild_skb_fake_ll(struct qeth_card *card, struct sk_buff *skb,
fake_hdr->h_proto = skb->protocol;
}
static inline void
qeth_rebuild_skb_fake_ll(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
{
if (card->dev->type == ARPHRD_IEEE802_TR)
qeth_rebuild_skb_fake_ll_tr(card, skb, hdr);
else
qeth_rebuild_skb_fake_ll_eth(card, skb, hdr);
}
static inline void
qeth_rebuild_skb_vlan(struct qeth_card *card, struct sk_buff *skb,
struct qeth_hdr *hdr)
......@@ -3440,16 +3507,25 @@ qeth_fake_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, void *daddr, void *saddr,
unsigned len)
{
struct ethhdr *hdr;
if(dev->type == ARPHRD_IEEE802_TR){
struct trh_hdr *hdr;
hdr = (struct trh_hdr *)skb_push(skb, QETH_FAKE_LL_LEN_TR);
memcpy(hdr->saddr, dev->dev_addr, TR_ALEN);
memcpy(hdr->daddr, "FAKELL", TR_ALEN);
return QETH_FAKE_LL_LEN_TR;
} else {
struct ethhdr *hdr;
hdr = (struct ethhdr *)skb_push(skb, QETH_FAKE_LL_LEN_ETH);
memcpy(hdr->h_source, dev->dev_addr, ETH_ALEN);
memcpy(hdr->h_dest, "FAKELL", ETH_ALEN);
if (type != ETH_P_802_3)
hdr->h_proto = htons(type);
else
hdr->h_proto = htons(len);
return QETH_FAKE_LL_LEN_ETH;
hdr = (struct ethhdr *)skb_push(skb, QETH_FAKE_LL_LEN);
memcpy(hdr->h_source, dev->dev_addr, ETH_ALEN);
memcpy(hdr->h_dest, "FAKELL", ETH_ALEN);
if (type != ETH_P_802_3)
hdr->h_proto = htons(type);
else
hdr->h_proto = htons(len);
return QETH_FAKE_LL_LEN;
}
}
static inline int
......@@ -3882,9 +3958,15 @@ qeth_fill_header(struct qeth_card *card, struct qeth_hdr *hdr,
memcpy(hdr->hdr.l3.dest_addr, &skb->nh.ipv6h->daddr, 16);
}
} else { /* passthrough */
if (!memcmp(skb->data + sizeof(struct qeth_hdr),
if((skb->dev->type == ARPHRD_IEEE802_TR) &&
!memcmp(skb->data + sizeof(struct qeth_hdr) + 2,
skb->dev->broadcast, 6)) {
hdr->hdr.l3.flags = QETH_CAST_BROADCAST |
QETH_HDR_PASSTHRU;
} else if (!memcmp(skb->data + sizeof(struct qeth_hdr),
skb->dev->broadcast, 6)) { /* broadcast? */
hdr->hdr.l3.flags = QETH_CAST_BROADCAST | QETH_HDR_PASSTHRU;
hdr->hdr.l3.flags = QETH_CAST_BROADCAST |
QETH_HDR_PASSTHRU;
} else {
hdr->hdr.l3.flags = (cast_type == RTN_MULTICAST) ?
QETH_CAST_MULTICAST | QETH_HDR_PASSTHRU :
......@@ -4164,7 +4246,11 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
dev_kfree_skb_irq(skb);
return 0;
}
skb_pull(skb, QETH_FAKE_LL_LEN);
if(card->dev->type == ARPHRD_IEEE802_TR){
skb_pull(skb, QETH_FAKE_LL_LEN_TR);
} else {
skb_pull(skb, QETH_FAKE_LL_LEN_ETH);
}
}
}
cast_type = qeth_get_cast_type(card, skb);
......
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