[ofa-general] [PATCH RFC] IPv6 address support in rdma_translate_ip

[Aleksey Senin]

The problem that IPv6 address not catched by this function.
There is ip_dev_find function in the kernel for IPv4 protocol, but no analog for IPv6.
The solution is to use ipv6_chk_addr function for each network device found in the system.
The small problem that the same action  ( ip_dev_find ) executed in another place ( addr_resolve_local ),
so it may be better write local, static no exported ipv6_dev_find function and used it 
from addr_resolve_local and rdma_translate_ip instead write the same code twice.




Signed-off-by: Aleksey Senin <alekseys at voltaire.com>
---
 drivers/infiniband/core/addr.c |   30 +++++++++++++++++++++++-------
 1 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index b59ad53..f95d21f 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -41,6 +41,7 @@
 #include <net/neighbour.h>
 #include <net/route.h>
 #include <net/netevent.h>
+#include <net/addrconf.h>
 #include <rdma/ib_addr.h>
 
 MODULE_AUTHOR("Sean Hefty");
@@ -113,15 +114,30 @@ EXPORT_SYMBOL(rdma_copy_addr);
 int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
 {
 	struct net_device *dev;
-	__be32 ip = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
-	int ret;
+	int ret = -EADDRNOTAVAIL;
 
-	dev = ip_dev_find(&init_net, ip);
-	if (!dev)
-		return -EADDRNOTAVAIL;
+	switch (addr->sa_family) {
+	case AF_INET:
+		dev = ip_dev_find(&init_net,
+			((struct sockaddr_in *) addr)->sin_addr.s_addr);
 
-	ret = rdma_copy_addr(dev_addr, dev, NULL);
-	dev_put(dev);
+		if (!dev)
+			return -EADDRNOTAVAIL;
+
+		ret = rdma_copy_addr(dev_addr, dev, NULL);
+		dev_put(dev);
+		break;
+	case AF_INET6:
+		for_each_netdev(&init_net, dev) {
+			if (ipv6_chk_addr(&init_net, &((struct sockaddr_in6 *) addr)->sin6_addr, dev, 1)) {
+				ret = rdma_copy_addr(dev_addr, dev, NULL);
+				break;
+			}
+		}
+		break;
+	default:
+		break;
+	}
 	return ret;
 }
 EXPORT_SYMBOL(rdma_translate_ip);
-- 
1.5.6.dirty