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Subject[PATCH][v4][18/24] IPoIB IPv6 support
Add ipv6_ib_mc_map() to convert IPv6 multicast addresses to IPoIB
hardware addresses, and add support for autoconfiguration for devices
with type ARPHRD_INFINIBAND.

The mapping for multicast addresses is described in
http://www.ietf.org/internet-drafts/draft-ietf-ipoib-ip-over-infiniband-08.txt

Signed-off-by: Nitin Hande <Nitin.Hande@Sun.Com>
Signed-off-by: Roland Dreier <roland@topspin.com>


--- linux-bk.orig/include/net/if_inet6.h 2004-12-19 21:09:54.000000000 -0800
+++ linux-bk/include/net/if_inet6.h 2004-12-19 22:04:17.213162542 -0800
@@ -266,5 +266,20 @@
{
buf[0] = 0x00;
}
+
+static inline void ipv6_ib_mc_map(struct in6_addr *addr, char *buf)
+{
+ buf[0] = 0; /* Reserved */
+ buf[1] = 0xff; /* Multicast QPN */
+ buf[2] = 0xff;
+ buf[3] = 0xff;
+ buf[4] = 0xff;
+ buf[5] = 0x12; /* link local scope */
+ buf[6] = 0x60; /* IPv6 signature */
+ buf[7] = 0x1b;
+ buf[8] = 0; /* P_Key */
+ buf[9] = 0;
+ memcpy(buf + 10, addr->s6_addr + 6, 10);
+}
#endif
#endif
--- linux-bk.orig/net/ipv6/addrconf.c 2004-12-19 21:09:51.000000000 -0800
+++ linux-bk/net/ipv6/addrconf.c 2004-12-19 22:04:17.215162248 -0800
@@ -48,6 +48,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/if_arcnet.h>
+#include <linux/if_infiniband.h>
#include <linux/route.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
@@ -1095,6 +1096,12 @@
memset(eui, 0, 7);
eui[7] = *(u8*)dev->dev_addr;
return 0;
+ case ARPHRD_INFINIBAND:
+ if (dev->addr_len != INFINIBAND_ALEN)
+ return -1;
+ memcpy(eui, dev->dev_addr + 12, 8);
+ eui[0] |= 2;
+ return 0;
}
return -1;
}
@@ -1794,7 +1801,8 @@
if ((dev->type != ARPHRD_ETHER) &&
(dev->type != ARPHRD_FDDI) &&
(dev->type != ARPHRD_IEEE802_TR) &&
- (dev->type != ARPHRD_ARCNET)) {
+ (dev->type != ARPHRD_ARCNET) &&
+ (dev->type != ARPHRD_INFINIBAND)) {
/* Alas, we support only Ethernet autoconfiguration. */
return;
}
--- linux-bk.orig/net/ipv6/ndisc.c 2004-12-19 21:09:20.000000000 -0800
+++ linux-bk/net/ipv6/ndisc.c 2004-12-19 22:04:17.216162100 -0800
@@ -260,6 +260,9 @@
case ARPHRD_ARCNET:
ipv6_arcnet_mc_map(addr, buf);
return 0;
+ case ARPHRD_INFINIBAND:
+ ipv6_ib_mc_map(addr, buf);
+ return 0;
default:
if (dir) {
memcpy(buf, dev->broadcast, dev->addr_len);
-
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