nvmet-rdma: use generic inet_pton_with_scope

Instead of parsing address strings, use a generic
helper. This also adds ipv6 (with address scopes)
support.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
index 88bb5814c264f57fcfa4e2e21f5d025a4305f00d..99c69018a35f4419b3dc3a14576c373c044e661a 100644 (file)
--- a/drivers/nvme/target/rdma.c
+++ b/drivers/nvme/target/rdma.c
@@ -1432,12 +1432,16 @@ restart:
 static int nvmet_rdma_add_port(struct nvmet_port *port)
 {
        struct rdma_cm_id *cm_id;
-       struct sockaddr_in addr_in;
-       u16 port_in;
+       struct sockaddr_storage addr = { };
+       __kernel_sa_family_t af;
        int ret;
 
        switch (port->disc_addr.adrfam) {
        case NVMF_ADDR_FAMILY_IP4:
+               af = AF_INET;
+               break;
+       case NVMF_ADDR_FAMILY_IP6:
+               af = AF_INET6;
                break;
        default:
                pr_err("address family %d not supported\n",
@@ -1445,13 +1449,13 @@ static int nvmet_rdma_add_port(struct nvmet_port *port)
                return -EINVAL;
        }
 
-       ret = kstrtou16(port->disc_addr.trsvcid, 0, &port_in);
-       if (ret)
+       ret = inet_pton_with_scope(&init_net, af, port->disc_addr.traddr,
+                       port->disc_addr.trsvcid, &addr);
+       if (ret) {
+               pr_err("malformed ip/port passed: %s:%s\n",
+                       port->disc_addr.traddr, port->disc_addr.trsvcid);
                return ret;
-
-       addr_in.sin_family = AF_INET;
-       addr_in.sin_addr.s_addr = in_aton(port->disc_addr.traddr);
-       addr_in.sin_port = htons(port_in);
+       }
 
        cm_id = rdma_create_id(&init_net, nvmet_rdma_cm_handler, port,
                        RDMA_PS_TCP, IB_QPT_RC);
@@ -1460,20 +1464,32 @@ static int nvmet_rdma_add_port(struct nvmet_port *port)
                return PTR_ERR(cm_id);
        }
 
-       ret = rdma_bind_addr(cm_id, (struct sockaddr *)&addr_in);
+       /*
+        * Allow both IPv4 and IPv6 sockets to bind a single port
+        * at the same time.
+        */
+       ret = rdma_set_afonly(cm_id, 1);
+       if (ret) {
+               pr_err("rdma_set_afonly failed (%d)\n", ret);
+               goto out_destroy_id;
+       }
+
+       ret = rdma_bind_addr(cm_id, (struct sockaddr *)&addr);
        if (ret) {
-               pr_err("binding CM ID to %pISpc failed (%d)\n", &addr_in, ret);
+               pr_err("binding CM ID to %pISpcs failed (%d)\n",
+                       (struct sockaddr *)&addr, ret);
                goto out_destroy_id;
        }
 
        ret = rdma_listen(cm_id, 128);
        if (ret) {
-               pr_err("listening to %pISpc failed (%d)\n", &addr_in, ret);
+               pr_err("listening to %pISpcs failed (%d)\n",
+                       (struct sockaddr *)&addr, ret);
                goto out_destroy_id;
        }
 
-       pr_info("enabling port %d (%pISpc)\n",
-               le16_to_cpu(port->disc_addr.portid), &addr_in);
+       pr_info("enabling port %d (%pISpcs)\n",
+               le16_to_cpu(port->disc_addr.portid), (struct sockaddr *)&addr);
        port->priv = cm_id;
        return 0;