IB/addr: Simplify resolving IPv4 addresses
Merge resolve local/remote address resolution into a single data flow to ensure consistent access and use of the local routing tables. Based on work from: David Wilder <dwilder@us.ibm.com> Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Sean Hefty
Roland Dreier
Родитель
6f8372b69c
Коммит
923c100ef0
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@ -184,17 +184,6 @@ static void addr_send_arp(struct sockaddr *dst_in)
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memset(&fl, 0, sizeof fl);
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switch (dst_in->sa_family) {
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case 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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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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break;
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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case AF_INET6:
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{
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@ -215,7 +204,7 @@ static void addr_send_arp(struct sockaddr *dst_in)
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}
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}
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static int addr4_resolve_remote(struct sockaddr_in *src_in,
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static int addr4_resolve(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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@ -235,6 +224,16 @@ static int addr4_resolve_remote(struct sockaddr_in *src_in,
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if (ret)
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goto out;
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src_in->sin_family = AF_INET;
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src_in->sin_addr.s_addr = rt->rt_src;
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if (rt->idev->dev->flags & IFF_LOOPBACK) {
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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, addr->src_dev_addr, MAX_ADDR_LEN);
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goto put;
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}
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/* If the device does ARP internally, return 'done' */
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if (rt->idev->dev->flags & IFF_NOARP) {
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rdma_copy_addr(addr, rt->idev->dev, NULL);
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@ -242,19 +241,12 @@ static int addr4_resolve_remote(struct sockaddr_in *src_in,
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}
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neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->idev->dev);
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if (!neigh) {
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ret = -ENODATA;
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goto put;
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}
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if (!(neigh->nud_state & NUD_VALID)) {
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if (!neigh || !(neigh->nud_state & NUD_VALID)) {
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neigh_event_send(rt->u.dst.neighbour, NULL);
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ret = -ENODATA;
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if (neigh)
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goto release;
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}
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if (!src_ip) {
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src_in->sin_family = dst_in->sin_family;
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src_in->sin_addr.s_addr = rt->rt_src;
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goto put;
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}
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ret = rdma_copy_addr(addr, neigh->dev, neigh->ha);
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@ -305,12 +297,12 @@ static int addr6_resolve_remote(struct sockaddr_in6 *src_in,
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}
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#endif
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static int addr_resolve_remote(struct sockaddr *src_in,
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static int addr_resolve(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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return addr4_resolve((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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@ -330,8 +322,7 @@ static void process_req(struct work_struct *work)
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if (req->status == -ENODATA) {
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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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req->status = addr_resolve(src_in, dst_in, req->addr);
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if (req->status && time_after_eq(jiffies, req->timeout))
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req->status = -ETIMEDOUT;
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else if (req->status == -ENODATA)
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@ -363,32 +354,6 @@ static int addr_resolve_local(struct sockaddr *src_in,
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int ret;
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switch (dst_in->sa_family) {
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case AF_INET:
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{
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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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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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break;
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}
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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case AF_INET6:
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{
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@ -473,7 +438,7 @@ int rdma_resolve_ip(struct rdma_addr_client *client,
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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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req->status = addr_resolve_remote(src_in, dst_in, addr);
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req->status = addr_resolve(src_in, dst_in, addr);
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switch (req->status) {
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case 0:
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