Commit 38617c64 authored by Aleksey Senin's avatar Aleksey Senin Committed by Roland Dreier
Browse files

RDMA/addr: Add support for translating IPv6 addresses 



Add support for translating AF_INET6 addresses to the IB address
translation service.  This requires using struct sockaddr_storage
instead of struct sockaddr wherever an IPv6 address might be stored,
and adding cases to handle IPv6 in addition to IPv4 to the various
translation functions.

Signed-off-by: default avatarAleksey Senin <aleksey@alst60.(none)>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 061e41fd

drivers/infiniband/core/addr.c

+151 −45
Original line number Diff line number Diff line
@@ -41,6 +41,8 @@ 
#include <net/neighbour.h>

#include <net/route.h>

#include <net/netevent.h>

#include <net/addrconf.h>

#include <net/ip6_route.h>

#include <rdma/ib_addr.h>



MODULE_AUTHOR("Sean Hefty");
@@ -49,8 +51,8 @@ MODULE_LICENSE("Dual BSD/GPL"); 


struct addr_req {

	struct list_head list;

	struct sockaddr src_addr;

	struct sockaddr dst_addr;

	struct sockaddr_storage src_addr;

	struct sockaddr_storage dst_addr;

	struct rdma_dev_addr *addr;

	struct rdma_addr_client *client;

	void *context;
@@ -113,15 +115,32 @@ 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;



	switch (addr->sa_family) {

	case AF_INET:

		dev = ip_dev_find(&init_net,

			((struct sockaddr_in *) addr)->sin_addr.s_addr);



	dev = ip_dev_find(&init_net, ip);

		if (!dev)

		return -EADDRNOTAVAIL;

			return ret;



		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);
@@ -156,22 +175,37 @@ 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 (dst_in->sa_family == AF_INET)  {

		fl.nl_u.ip4_u.daddr =

			((struct sockaddr_in *) dst_in)->sin_addr.s_addr;



		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_in *src_in,

static int addr4_resolve_remote(struct sockaddr_in *src_in,

			       struct sockaddr_in *dst_in,

			       struct rdma_dev_addr *addr)

{
@@ -220,10 +254,51 @@ 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;

	struct sockaddr_in *src_in, *dst_in;

	struct sockaddr *src_in, *dst_in;

	struct list_head done_list;



	INIT_LIST_HEAD(&done_list);
@@ -231,8 +306,8 @@ static void process_req(struct work_struct *work) 
	mutex_lock(&lock);

	list_for_each_entry_safe(req, temp_req, &req_list, list) {

		if (req->status == -ENODATA) {

			src_in = (struct sockaddr_in *) &req->src_addr;

			dst_in = (struct sockaddr_in *) &req->dst_addr;

			src_in = (struct sockaddr *) &req->src_addr;

			dst_in = (struct sockaddr *) &req->dst_addr;

			req->status = addr_resolve_remote(src_in, dst_in,

							  req->addr);

			if (req->status && time_after_eq(jiffies, req->timeout))
@@ -251,41 +326,72 @@ static void process_req(struct work_struct *work) 


	list_for_each_entry_safe(req, temp_req, &done_list, list) {

		list_del(&req->list);

		req->callback(req->status, &req->src_addr, req->addr,

			      req->context);

		req->callback(req->status, (struct sockaddr *) &req->src_addr,

			req->addr, req->context);

		put_client(req->client);

		kfree(req);

	}

}



static int addr_resolve_local(struct sockaddr_in *src_in,

			      struct sockaddr_in *dst_in,

static int addr_resolve_local(struct sockaddr *src_in,

			      struct sockaddr *dst_in,

			      struct rdma_dev_addr *addr)

{

	struct net_device *dev;

	__be32 src_ip = src_in->sin_addr.s_addr;

	__be32 dst_ip = dst_in->sin_addr.s_addr;

	int ret;



	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->sin_family = dst_in->sin_family;

		src_in->sin_addr.s_addr = dst_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((struct sockaddr *)dst_in, addr);

			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((struct sockaddr *)src_in, addr);

			ret = rdma_translate_ip(src_in, addr);

			if (!ret)

				memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);

		}



		dev_put(dev);

	} else {

		struct in6_addr *a;



		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);

		}

	}



	return ret;

}
@@ -296,7 +402,7 @@ int rdma_resolve_ip(struct rdma_addr_client *client, 
				     struct rdma_dev_addr *addr, void *context),

		    void *context)

{

	struct sockaddr_in *src_in, *dst_in;

	struct sockaddr *src_in, *dst_in;

	struct addr_req *req;

	int ret = 0;
@@ -313,8 +419,8 @@ int rdma_resolve_ip(struct rdma_addr_client *client, 
	req->client = client;

	atomic_inc(&client->refcount);



	src_in = (struct sockaddr_in *) &req->src_addr;

	dst_in = (struct sockaddr_in *) &req->dst_addr;

	src_in = (struct sockaddr *) &req->src_addr;

	dst_in = (struct sockaddr *) &req->dst_addr;



	req->status = addr_resolve_local(src_in, dst_in, addr);

	if (req->status == -EADDRNOTAVAIL)

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