Merge tag 'uuid-for-4.13-2' of git://git.infradead.org/users/hch/uuid

[linux.git] / drivers / infiniband / core / addr.c

diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c
index a6cb379a4ebcb3060c93eb959aa3071d45f78b37..01236cef7bfb1affe07e4214cf6d8baf6ca2a2a1 100644 (file)
--- a/drivers/infiniband/core/addr.c
+++ b/drivers/infiniband/core/addr.c
@@ -268,6 +268,7 @@ int rdma_translate_ip(const struct sockaddr *addr,
                        return ret;
 
                ret = rdma_copy_addr(dev_addr, dev, NULL);
+               dev_addr->bound_dev_if = dev->ifindex;
                if (vlan_id)
                        *vlan_id = rdma_vlan_dev_vlan_id(dev);
                dev_put(dev);
@@ -280,6 +281,7 @@ int rdma_translate_ip(const struct sockaddr *addr,
                                          &((const struct sockaddr_in6 *)addr)->sin6_addr,
                                          dev, 1)) {
                                ret = rdma_copy_addr(dev_addr, dev, NULL);
+                               dev_addr->bound_dev_if = dev->ifindex;
                                if (vlan_id)
                                        *vlan_id = rdma_vlan_dev_vlan_id(dev);
                                break;
@@ -405,10 +407,10 @@ static int addr4_resolve(struct sockaddr_in *src_in,
        fl4.saddr = src_ip;
        fl4.flowi4_oif = addr->bound_dev_if;
        rt = ip_route_output_key(addr->net, &fl4);
-       if (IS_ERR(rt)) {
-               ret = PTR_ERR(rt);
-               goto out;
-       }
+       ret = PTR_ERR_OR_ZERO(rt);
+       if (ret)
+               return ret;
+
        src_in->sin_family = AF_INET;
        src_in->sin_addr.s_addr = fl4.saddr;
 
@@ -423,8 +425,6 @@ static int addr4_resolve(struct sockaddr_in *src_in,
 
        *prt = rt;
        return 0;
-out:
-       return ret;
 }
 
 #if IS_ENABLED(CONFIG_IPV6)
@@ -509,6 +509,11 @@ static int addr_resolve(struct sockaddr *src_in,
        struct dst_entry *dst;
        int ret;
 
+       if (!addr->net) {
+               pr_warn_ratelimited("%s: missing namespace\n", __func__);
+               return -EINVAL;
+       }
+
        if (src_in->sa_family == AF_INET) {
                struct rtable *rt = NULL;
                const struct sockaddr_in *dst_in4 =
@@ -522,8 +527,12 @@ static int addr_resolve(struct sockaddr *src_in,
                if (resolve_neigh)
                        ret = addr_resolve_neigh(&rt->dst, dst_in, addr, seq);
 
-               ndev = rt->dst.dev;
-               dev_hold(ndev);
+               if (addr->bound_dev_if) {
+                       ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
+               } else {
+                       ndev = rt->dst.dev;
+                       dev_hold(ndev);
+               }
 
                ip_rt_put(rt);
        } else {
@@ -539,14 +548,27 @@ static int addr_resolve(struct sockaddr *src_in,
                if (resolve_neigh)
                        ret = addr_resolve_neigh(dst, dst_in, addr, seq);
 
-               ndev = dst->dev;
-               dev_hold(ndev);
+               if (addr->bound_dev_if) {
+                       ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
+               } else {
+                       ndev = dst->dev;
+                       dev_hold(ndev);
+               }
 
                dst_release(dst);
        }
 
-       addr->bound_dev_if = ndev->ifindex;
-       addr->net = dev_net(ndev);
+       if (ndev->flags & IFF_LOOPBACK) {
+               ret = rdma_translate_ip(dst_in, addr, NULL);
+               /*
+                * Put the loopback device and get the translated
+                * device instead.
+                */
+               dev_put(ndev);
+               ndev = dev_get_by_index(addr->net, addr->bound_dev_if);
+       } else {
+               addr->bound_dev_if = ndev->ifindex;
+       }
        dev_put(ndev);
 
        return ret;