qemu: block: Use proper type for servers for VxHS disks

Original implementation used 'SocketAddress' equivalent from qemu for
the disk server field, while qemu documentation specifies
'InetSocketAddress'. The backing store parser uses the correct parsing
function but the formatter used the incorrect one (and also with the
legacy mode enabled which was wrong).

src/qemu/qemu_block.c

@@ -501,6 +501,40 @@ qemuBlockStorageSourceBuildHostsJSONSocketAddress(virStorageSourcePtr src,
 }
 
 
+/**
+ * qemuBlockStorageSourceBuildJSONInetSocketAddress
+ * @host: the virStorageNetHostDefPtr definition to build
+ *
+ * Formats @hosts into a json object conforming to the 'InetSocketAddress' type
+ * in qemu.
+ *
+ * Returns a virJSONValuePtr for a single server.
+ */
+static virJSONValuePtr
+qemuBlockStorageSourceBuildJSONInetSocketAddress(virStorageNetHostDefPtr host)
+{
+    virJSONValuePtr ret = NULL;
+    char *port = NULL;
+
+    if (host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("only TCP protocol can be converted to InetSocketAddress"));
+        return NULL;
+    }
+
+    if (virAsprintf(&port, "%u", host->port) < 0)
+        return NULL;
+
+    ignore_value(virJSONValueObjectCreate(&ret,
+                                          "s:host", host->name,
+                                          "s:port", port,
+                                          NULL));
+
+    VIR_FREE(port);
+    return ret;
+}
+
+
 static virJSONValuePtr
 qemuBlockStorageSourceGetGlusterProps(virStorageSourcePtr src)
 {
@@ -540,7 +574,7 @@ qemuBlockStorageSourceGetVxHSProps(virStorageSourcePtr src)
         return NULL;
     }
 
-    if (!(server = qemuBlockStorageSourceBuildJSONSocketAddress(src->hosts, true)))
+    if (!(server = qemuBlockStorageSourceBuildJSONInetSocketAddress(&src->hosts[0])))
         return NULL;
 
     /* VxHS disk specification example:

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-tlsx509-vxhs.args

@@ -23,7 +23,7 @@ server,nowait \
 -object tls-creds-x509,id=objvirtio-disk0_tls0,dir=/etc/pki/libvirt-vxhs,\
 endpoint=client,verify-peer=yes \
 -drive file.driver=vxhs,file.tls-creds=objvirtio-disk0_tls0,\
-file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,file.server.type=tcp,\
+file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,\
 file.server.host=192.168.0.1,file.server.port=9999,format=raw,if=none,\
 id=drive-virtio-disk0,cache=none \
 -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
@@ -31,13 +31,13 @@ id=virtio-disk0 \
 -object tls-creds-x509,id=objvirtio-disk1_tls0,dir=/etc/pki/libvirt-vxhs,\
 endpoint=client,verify-peer=yes \
 -drive file.driver=vxhs,file.tls-creds=objvirtio-disk1_tls0,\
-file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc252,file.server.type=tcp,\
+file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc252,\
 file.server.host=192.168.0.2,file.server.port=9999,format=raw,if=none,\
 id=drive-virtio-disk1,cache=none \
 -device virtio-blk-pci,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,\
 id=virtio-disk1 \
 -drive file.driver=vxhs,file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc253,\
-file.server.type=tcp,file.server.host=192.168.0.3,file.server.port=9999,\
+file.server.host=192.168.0.3,file.server.port=9999,format=raw,if=none,\
-format=raw,if=none,id=drive-virtio-disk2,cache=none \
+id=drive-virtio-disk2,cache=none \
 -device virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk2,\
 id=virtio-disk2

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-vxhs.args

@@ -21,7 +21,7 @@ server,nowait \
 -boot c \
 -usb \
 -drive file.driver=vxhs,file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,\
-file.server.type=tcp,file.server.host=192.168.0.1,file.server.port=9999,\
+file.server.host=192.168.0.1,file.server.port=9999,format=raw,if=none,\
-format=raw,if=none,id=drive-virtio-disk0,cache=none \
+id=drive-virtio-disk0,cache=none \
 -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
 id=virtio-disk0

tests/virstoragetest.c

@@ -1601,8 +1601,7 @@ mymain(void)
                        "</source>\n");
     TEST_BACKING_PARSE("json:{\"file\":{\"driver\":\"vxhs\","
                                        "\"vdisk-id\":\"c6718f6b-0401-441d-a8c3-1f0064d75ee0\","
-                                       "\"server\": { \"type\":\"tcp\","
+                                       "\"server\": {  \"host\":\"example.com\","
-                                                      "\"host\":\"example.com\","
                                                       "\"port\":\"9999\""
                                                    "}"
                                       "}"