[ofa-general] [RMDA CM IPv6 support. PATCHv5 1/2]IPv6 IB addr resolution
Aleksey Senin
alekseys at voltaire.com
Mon Dec 1 05:16:44 PST 2008
Set from two patches for support IPv6 protocol in RMDA CM
Changes:
Use two patches instead of six.
This patch adds IPv6 support for IB address resolution.
>From da89c2a9ce0b2309362208f167fa2582f2f0d929 Mon Sep 17 00:00:00 2001
From: Aleksey Senin <alekseys at voltaire.com>
Date: Mon, 1 Dec 2008 13:55:01 +0200
Subject: [PATCH] IB addr IPv6 support
Support for network discovery in addr_send_arp function.
Local IPv6 address resolution.
Added remote IPv6 address resolusion for RDMA CM.
Function addr_resolve_remote used as wrapper for two other functions:
addr4_resolve_remote ( original addr_resolve_remote )
addr6_resolve_remote ( new function )
Signed-off-by: Aleksey Senin <alekseys at voltaire.com>
:100644 100644 f95d21f... d9170c6... M drivers/infiniband/core/addr.c
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index f95d21f..d9170c6 100644
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -43,6 +43,7 @@
#include <net/netevent.h>
#include <net/addrconf.h>
#include <rdma/ib_addr.h>
+#include <net/ip6_route.h>
MODULE_AUTHOR("Sean Hefty");
MODULE_DESCRIPTION("IB Address Translation");
@@ -172,27 +173,42 @@ static void queue_req(struct addr_req *req)
mutex_unlock(&lock);
}
-static void addr_send_arp(struct sockaddr_in *dst_in)
+static void addr_send_arp(struct sockaddr *dst_in)
{
struct rtable *rt;
struct flowi fl;
- __be32 dst_ip = dst_in->sin_addr.s_addr;
+ struct dst_entry *dst;
memset(&fl, 0, sizeof fl);
- fl.nl_u.ip4_u.daddr = dst_ip;
- if (ip_route_output_key(&init_net, &rt, &fl))
- return;
+ if (dst_in->sa_family == AF_INET) {
+ fl.nl_u.ip4_u.daddr =
+ ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
- neigh_event_send(rt->u.dst.neighbour, NULL);
- ip_rt_put(rt);
+ if (ip_route_output_key(&init_net, &rt, &fl))
+ return;
+
+ neigh_event_send(rt->u.dst.neighbour, NULL);
+ ip_rt_put(rt);
+
+ } else {
+ fl.nl_u.ip6_u.daddr =
+ ((struct sockaddr_in6 *)dst_in)->sin6_addr;
+
+ dst = ip6_route_output(&init_net, NULL, &fl);
+ if (!dst)
+ return;
+
+ neigh_event_send(dst->neighbour, NULL);
+ dst_release(dst);
+ }
}
-static int addr_resolve_remote(struct sockaddr *src_in,
- struct sockaddr *dst_in,
+static int addr4_resolve_remote(struct sockaddr_in *src_in,
+ struct sockaddr_in *dst_in,
struct rdma_dev_addr *addr)
{
- __be32 src_ip = ((struct sockaddr_in *)src_in)->sin_addr.s_addr;
- __be32 dst_ip = ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
+ __be32 src_ip = src_in->sin_addr.s_addr;
+ __be32 dst_ip = dst_in->sin_addr.s_addr;
struct flowi fl;
struct rtable *rt;
struct neighbour *neigh;
@@ -223,8 +239,8 @@ static int addr_resolve_remote(struct sockaddr *src_in,
}
if (!src_ip) {
- src_in->sa_family = dst_in->sa_family;
- ((struct sockaddr_in *)src_in)->sin_addr.s_addr = rt->rt_src;
+ src_in->sin_family = dst_in->sin_family;
+ src_in->sin_addr.s_addr = rt->rt_src;
}
ret = rdma_copy_addr(addr, neigh->dev, neigh->ha);
@@ -236,6 +252,47 @@ out:
return ret;
}
+static int addr6_resolve_remote(struct sockaddr_in6 *src_in,
+ struct sockaddr_in6 *dst_in,
+ struct rdma_dev_addr *addr)
+{
+ struct flowi fl;
+ struct neighbour *neigh;
+ struct dst_entry *dst;
+ int ret = -ENODATA;
+
+ memset(&fl, 0, sizeof fl);
+ fl.nl_u.ip6_u.daddr = dst_in->sin6_addr;
+ fl.nl_u.ip6_u.saddr = src_in->sin6_addr;
+
+ dst = ip6_route_output(&init_net, NULL, &fl);
+ if (!dst)
+ return ret;
+
+ if (dst->dev->flags & IFF_NOARP) {
+ ret = rdma_copy_addr(addr, dst->dev, NULL);
+ } else {
+ neigh = dst->neighbour;
+ if (neigh && (neigh->nud_state & NUD_VALID))
+ ret = rdma_copy_addr(addr, neigh->dev, neigh->ha);
+ }
+
+ dst_release(dst);
+ return ret;
+}
+
+static int addr_resolve_remote(struct sockaddr *src_in,
+ struct sockaddr *dst_in,
+ struct rdma_dev_addr *addr)
+{
+ if (src_in->sa_family == AF_INET) {
+ return addr4_resolve_remote((struct sockaddr_in *)src_in,
+ (struct sockaddr_in *)dst_in, addr);
+ } else
+ return addr6_resolve_remote((struct sockaddr_in6 *)src_in,
+ (struct sockaddr_in6 *)dst_in, addr);
+}
+
static void process_req(struct work_struct *work)
{
struct addr_req *req, *temp_req;
@@ -279,29 +336,58 @@ static int addr_resolve_local(struct sockaddr *src_in,
struct rdma_dev_addr *addr)
{
struct net_device *dev;
- __be32 src_ip = ((struct sockaddr_in *)src_in)->sin_addr.s_addr;
- __be32 dst_ip = ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
- int ret;
+ int ret = -EADDRNOTAVAIL;
- dev = ip_dev_find(&init_net, dst_ip);
- if (!dev)
- return -EADDRNOTAVAIL;
+ if (dst_in->sa_family == AF_INET) {
+ __be32 src_ip = ((struct sockaddr_in *)src_in)->sin_addr.s_addr;
+ __be32 dst_ip = ((struct sockaddr_in *)dst_in)->sin_addr.s_addr;
+
+ dev = ip_dev_find(&init_net, dst_ip);
+ if (!dev)
+ return -EADDRNOTAVAIL;
- if (ipv4_is_zeronet(src_ip)) {
- src_in->sa_family = dst_in->sa_family;
- ((struct sockaddr_in *)src_in)->sin_addr.s_addr = dst_ip;
- ret = rdma_copy_addr(addr, dev, dev->dev_addr);
- } else if (ipv4_is_loopback(src_ip)) {
- ret = rdma_translate_ip(dst_in, addr);
- if (!ret)
- memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ if (ipv4_is_zeronet(src_ip)) {
+ src_in->sa_family = dst_in->sa_family;
+ ((struct sockaddr_in *)src_in)->sin_addr.s_addr = dst_ip;
+ ret = rdma_copy_addr(addr, dev, dev->dev_addr);
+ } else if (ipv4_is_loopback(src_ip)) {
+ ret = rdma_translate_ip(dst_in, addr);
+ if (!ret)
+ memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ } else {
+ ret = rdma_translate_ip(src_in, addr);
+ if (!ret)
+ memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ }
+ dev_put(dev);
} else {
- ret = rdma_translate_ip(src_in, addr);
- if (!ret)
- memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ struct in6_addr *a = &((struct sockaddr_in6 *)dst_in)->sin6_addr;
+
+ for_each_netdev(&init_net, dev)
+ if (ipv6_chk_addr(&init_net, &((struct sockaddr_in6 *) addr)->sin6_addr, dev, 1))
+ break;
+
+ if (!dev)
+ return -EADDRNOTAVAIL;
+
+ a = &((struct sockaddr_in6 *)src_in)->sin6_addr;
+
+ if (ipv6_addr_any(a)) {
+ src_in->sa_family = dst_in->sa_family;
+ ((struct sockaddr_in6 *)src_in)->sin6_addr =
+ ((struct sockaddr_in6 *)dst_in)->sin6_addr;
+ ret = rdma_copy_addr(addr, dev, dev->dev_addr);
+ } else if (ipv6_addr_loopback(a)) {
+ ret = rdma_translate_ip(dst_in, addr);
+ if (!ret)
+ memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ } else {
+ ret = rdma_translate_ip(src_in, addr);
+ if (!ret)
+ memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
+ }
}
- dev_put(dev);
return ret;
}
@@ -344,7 +430,7 @@ int rdma_resolve_ip(struct rdma_addr_client *client,
case -ENODATA:
req->timeout = msecs_to_jiffies(timeout_ms) + jiffies;
queue_req(req);
- addr_send_arp((struct sockaddr_in *)dst_in);
+ addr_send_arp(dst_in);
break;
default:
ret = req->status;
--
1.5.6
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