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https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
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: Aleksey Senin <aleksey@alst60.(none)> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Aleksey Senin
Roland Dreier
parent
061e41fdb5
commit
38617c64bf
1 changed files with 150 additions and 44 deletions
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@ -41,6 +41,8 @@
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#include <net/neighbour.h>
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#include <net/route.h>
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#include <net/netevent.h>
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#include <net/addrconf.h>
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#include <net/ip6_route.h>
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#include <rdma/ib_addr.h>
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MODULE_AUTHOR("Sean Hefty");
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@ -49,8 +51,8 @@ MODULE_LICENSE("Dual BSD/GPL");
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struct addr_req {
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struct list_head list;
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struct sockaddr src_addr;
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struct sockaddr dst_addr;
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struct sockaddr_storage src_addr;
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struct sockaddr_storage dst_addr;
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struct rdma_dev_addr *addr;
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struct rdma_addr_client *client;
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void *context;
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@ -113,15 +115,32 @@ EXPORT_SYMBOL(rdma_copy_addr);
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int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
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{
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struct net_device *dev;
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__be32 ip = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
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int ret;
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int ret = -EADDRNOTAVAIL;
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dev = ip_dev_find(&init_net, ip);
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if (!dev)
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return -EADDRNOTAVAIL;
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switch (addr->sa_family) {
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case AF_INET:
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dev = ip_dev_find(&init_net,
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((struct sockaddr_in *) addr)->sin_addr.s_addr);
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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dev_put(dev);
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if (!dev)
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return ret;
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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dev_put(dev);
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break;
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case AF_INET6:
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for_each_netdev(&init_net, dev) {
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if (ipv6_chk_addr(&init_net,
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&((struct sockaddr_in6 *) addr)->sin6_addr,
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dev, 1)) {
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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break;
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}
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}
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break;
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default:
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(rdma_translate_ip);
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@ -156,22 +175,37 @@ static void queue_req(struct addr_req *req)
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mutex_unlock(&lock);
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}
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static void addr_send_arp(struct sockaddr_in *dst_in)
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static void addr_send_arp(struct sockaddr *dst_in)
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{
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struct rtable *rt;
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struct flowi fl;
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__be32 dst_ip = dst_in->sin_addr.s_addr;
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struct dst_entry *dst;
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memset(&fl, 0, sizeof fl);
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fl.nl_u.ip4_u.daddr = dst_ip;
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if (ip_route_output_key(&init_net, &rt, &fl))
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return;
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if (dst_in->sa_family == AF_INET) {
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fl.nl_u.ip4_u.daddr =
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((struct sockaddr_in *) dst_in)->sin_addr.s_addr;
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neigh_event_send(rt->u.dst.neighbour, NULL);
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ip_rt_put(rt);
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if (ip_route_output_key(&init_net, &rt, &fl))
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return;
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neigh_event_send(rt->u.dst.neighbour, NULL);
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ip_rt_put(rt);
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} else {
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fl.nl_u.ip6_u.daddr =
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((struct sockaddr_in6 *) dst_in)->sin6_addr;
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dst = ip6_route_output(&init_net, NULL, &fl);
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if (!dst)
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return;
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neigh_event_send(dst->neighbour, NULL);
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dst_release(dst);
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}
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}
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static int addr_resolve_remote(struct sockaddr_in *src_in,
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static int addr4_resolve_remote(struct sockaddr_in *src_in,
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struct sockaddr_in *dst_in,
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struct rdma_dev_addr *addr)
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{
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@ -220,10 +254,51 @@ static int addr_resolve_remote(struct sockaddr_in *src_in,
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return ret;
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}
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static int addr6_resolve_remote(struct sockaddr_in6 *src_in,
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struct sockaddr_in6 *dst_in,
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struct rdma_dev_addr *addr)
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{
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struct flowi fl;
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struct neighbour *neigh;
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struct dst_entry *dst;
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int ret = -ENODATA;
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memset(&fl, 0, sizeof fl);
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fl.nl_u.ip6_u.daddr = dst_in->sin6_addr;
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fl.nl_u.ip6_u.saddr = src_in->sin6_addr;
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dst = ip6_route_output(&init_net, NULL, &fl);
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if (!dst)
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return ret;
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if (dst->dev->flags & IFF_NOARP) {
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ret = rdma_copy_addr(addr, dst->dev, NULL);
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} else {
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neigh = dst->neighbour;
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if (neigh && (neigh->nud_state & NUD_VALID))
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ret = rdma_copy_addr(addr, neigh->dev, neigh->ha);
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}
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dst_release(dst);
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return ret;
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}
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static int addr_resolve_remote(struct sockaddr *src_in,
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struct sockaddr *dst_in,
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struct rdma_dev_addr *addr)
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{
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if (src_in->sa_family == AF_INET) {
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return addr4_resolve_remote((struct sockaddr_in *) src_in,
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(struct sockaddr_in *) dst_in, addr);
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} else
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return addr6_resolve_remote((struct sockaddr_in6 *) src_in,
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(struct sockaddr_in6 *) dst_in, addr);
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}
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static void process_req(struct work_struct *work)
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{
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struct addr_req *req, *temp_req;
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struct sockaddr_in *src_in, *dst_in;
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struct sockaddr *src_in, *dst_in;
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struct list_head done_list;
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INIT_LIST_HEAD(&done_list);
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@ -231,8 +306,8 @@ static void process_req(struct work_struct *work)
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mutex_lock(&lock);
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list_for_each_entry_safe(req, temp_req, &req_list, list) {
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if (req->status == -ENODATA) {
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src_in = (struct sockaddr_in *) &req->src_addr;
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dst_in = (struct sockaddr_in *) &req->dst_addr;
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src_in = (struct sockaddr *) &req->src_addr;
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dst_in = (struct sockaddr *) &req->dst_addr;
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req->status = addr_resolve_remote(src_in, dst_in,
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req->addr);
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if (req->status && time_after_eq(jiffies, req->timeout))
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@ -251,41 +326,72 @@ static void process_req(struct work_struct *work)
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list_for_each_entry_safe(req, temp_req, &done_list, list) {
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list_del(&req->list);
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req->callback(req->status, &req->src_addr, req->addr,
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req->context);
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req->callback(req->status, (struct sockaddr *) &req->src_addr,
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req->addr, req->context);
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put_client(req->client);
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kfree(req);
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}
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}
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static int addr_resolve_local(struct sockaddr_in *src_in,
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struct sockaddr_in *dst_in,
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static int addr_resolve_local(struct sockaddr *src_in,
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struct sockaddr *dst_in,
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struct rdma_dev_addr *addr)
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{
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struct net_device *dev;
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__be32 src_ip = src_in->sin_addr.s_addr;
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__be32 dst_ip = dst_in->sin_addr.s_addr;
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int ret;
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dev = ip_dev_find(&init_net, dst_ip);
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if (!dev)
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return -EADDRNOTAVAIL;
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if (dst_in->sa_family == AF_INET) {
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__be32 src_ip = ((struct sockaddr_in *) src_in)->sin_addr.s_addr;
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__be32 dst_ip = ((struct sockaddr_in *) dst_in)->sin_addr.s_addr;
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if (ipv4_is_zeronet(src_ip)) {
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src_in->sin_family = dst_in->sin_family;
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src_in->sin_addr.s_addr = dst_ip;
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ret = rdma_copy_addr(addr, dev, dev->dev_addr);
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} else if (ipv4_is_loopback(src_ip)) {
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ret = rdma_translate_ip((struct sockaddr *)dst_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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dev = ip_dev_find(&init_net, dst_ip);
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if (!dev)
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return -EADDRNOTAVAIL;
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if (ipv4_is_zeronet(src_ip)) {
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src_in->sa_family = dst_in->sa_family;
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((struct sockaddr_in *) src_in)->sin_addr.s_addr = dst_ip;
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ret = rdma_copy_addr(addr, dev, dev->dev_addr);
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} else if (ipv4_is_loopback(src_ip)) {
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ret = rdma_translate_ip(dst_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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} else {
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ret = rdma_translate_ip(src_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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}
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dev_put(dev);
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} else {
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ret = rdma_translate_ip((struct sockaddr *)src_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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struct in6_addr *a;
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for_each_netdev(&init_net, dev)
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if (ipv6_chk_addr(&init_net,
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&((struct sockaddr_in6 *) addr)->sin6_addr,
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dev, 1))
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break;
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if (!dev)
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return -EADDRNOTAVAIL;
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a = &((struct sockaddr_in6 *) src_in)->sin6_addr;
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if (ipv6_addr_any(a)) {
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src_in->sa_family = dst_in->sa_family;
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((struct sockaddr_in6 *) src_in)->sin6_addr =
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((struct sockaddr_in6 *) dst_in)->sin6_addr;
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ret = rdma_copy_addr(addr, dev, dev->dev_addr);
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} else if (ipv6_addr_loopback(a)) {
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ret = rdma_translate_ip(dst_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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} else {
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ret = rdma_translate_ip(src_in, addr);
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if (!ret)
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memcpy(addr->dst_dev_addr, dev->dev_addr, MAX_ADDR_LEN);
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}
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}
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dev_put(dev);
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return ret;
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}
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@ -296,7 +402,7 @@ int rdma_resolve_ip(struct rdma_addr_client *client,
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struct rdma_dev_addr *addr, void *context),
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void *context)
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{
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struct sockaddr_in *src_in, *dst_in;
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struct sockaddr *src_in, *dst_in;
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struct addr_req *req;
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int ret = 0;
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@ -313,8 +419,8 @@ int rdma_resolve_ip(struct rdma_addr_client *client,
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req->client = client;
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atomic_inc(&client->refcount);
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src_in = (struct sockaddr_in *) &req->src_addr;
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dst_in = (struct sockaddr_in *) &req->dst_addr;
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src_in = (struct sockaddr *) &req->src_addr;
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dst_in = (struct sockaddr *) &req->dst_addr;
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req->status = addr_resolve_local(src_in, dst_in, addr);
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if (req->status == -EADDRNOTAVAIL)
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