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[PATCH][v4][18/24] IPoIB IPv6 support

To: linux-kernel@xxxxxxxxxxxxxxx
Subject: [PATCH][v4][18/24] IPoIB IPv6 support
From: Roland Dreier <roland@xxxxxxxxxxx>
Date: Sun, 19 Dec 2004 22:15:14 -0800
Cc: openib-general@xxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <200412192215.vegmgBmv5xungHlQ@xxxxxxxxxxx>
Sender: netdev-bounce@xxxxxxxxxxx
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@xxxxxxx>
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxx>


--- 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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