[PATCH v2 2/2] net: Drop the NetLegacy structure, always use Netdev instead

[Thomas Huth <thuth@redhat.com>]

Now that the "name" parameter is gone, there is hardly any difference
between NetLegacy and Netdev anymore. Drop NetLegacy and always use
Netdev to simplify the code quite a bit.

Signed-off-by: Thomas Huth <thuth@redhat.com>
---
 net/net.c     | 74 ++++++++-------------------------------------------
 qapi/net.json | 48 +--------------------------------
 2 files changed, 12 insertions(+), 110 deletions(-)

diff --git a/net/net.c b/net/net.c
index a24da66e66..4177224939 100644
--- a/net/net.c
+++ b/net/net.c
@@ -967,13 +967,14 @@ static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
 
 static int net_client_init1(const void *object, bool is_netdev, Error **errp)
 {
-    Netdev legacy = {0};
-    const Netdev *netdev;
+    const Netdev *netdev = object;
     NetClientState *peer = NULL;
 
     if (is_netdev) {
-        netdev = object;
-
+        if (!netdev->has_id) {
+            error_setg(errp, QERR_MISSING_PARAMETER, "id");
+            return -1;
+        }
         if (netdev->type == NET_CLIENT_DRIVER_NIC ||
             !net_client_init_fun[netdev->type]) {
             error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
@@ -981,56 +982,11 @@ static int net_client_init1(const void *object, bool is_netdev, Error **errp)
             return -1;
         }
     } else {
-        const NetLegacy *net = object;
-        const NetLegacyOptions *opts = net->opts;
-        legacy.id = net->id;
-        netdev = &legacy;
-
-        /* Map the old options to the new flat type */
-        switch (opts->type) {
-        case NET_LEGACY_OPTIONS_TYPE_NONE:
+        if (netdev->type == NET_CLIENT_DRIVER_NONE) {
             return 0; /* nothing to do */
-        case NET_LEGACY_OPTIONS_TYPE_NIC:
-            legacy.type = NET_CLIENT_DRIVER_NIC;
-            legacy.u.nic = opts->u.nic;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_USER:
-            legacy.type = NET_CLIENT_DRIVER_USER;
-            legacy.u.user = opts->u.user;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_TAP:
-            legacy.type = NET_CLIENT_DRIVER_TAP;
-            legacy.u.tap = opts->u.tap;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_L2TPV3:
-            legacy.type = NET_CLIENT_DRIVER_L2TPV3;
-            legacy.u.l2tpv3 = opts->u.l2tpv3;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_SOCKET:
-            legacy.type = NET_CLIENT_DRIVER_SOCKET;
-            legacy.u.socket = opts->u.socket;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_VDE:
-            legacy.type = NET_CLIENT_DRIVER_VDE;
-            legacy.u.vde = opts->u.vde;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_BRIDGE:
-            legacy.type = NET_CLIENT_DRIVER_BRIDGE;
-            legacy.u.bridge = opts->u.bridge;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_NETMAP:
-            legacy.type = NET_CLIENT_DRIVER_NETMAP;
-            legacy.u.netmap = opts->u.netmap;
-            break;
-        case NET_LEGACY_OPTIONS_TYPE_VHOST_USER:
-            legacy.type = NET_CLIENT_DRIVER_VHOST_USER;
-            legacy.u.vhost_user = opts->u.vhost_user;
-            break;
-        default:
-            abort();
         }
-
-        if (!net_client_init_fun[netdev->type]) {
+        if (netdev->type == NET_CLIENT_DRIVER_HUBPORT ||
+            !net_client_init_fun[netdev->type]) {
             error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
                        "a net backend type (maybe it is not compiled "
                        "into this binary)");
@@ -1039,7 +995,7 @@ static int net_client_init1(const void *object, bool is_netdev, Error **errp)
 
         /* Do not add to a hub if it's a nic with a netdev= parameter. */
         if (netdev->type != NET_CLIENT_DRIVER_NIC ||
-            !opts->u.nic.has_netdev) {
+            !netdev->u.nic.has_netdev) {
             peer = net_hub_add_port(0, NULL, NULL);
         }
     }
@@ -1143,21 +1099,13 @@ static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)
         }
     }
 
-    if (is_netdev) {
-        visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
-    } else {
-        visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err);
-    }
+    visit_type_Netdev(v, NULL, (Netdev **)&object, &err);
 
     if (!err) {
         ret = net_client_init1(object, is_netdev, &err);
     }
 
-    if (is_netdev) {
-        qapi_free_Netdev(object);
-    } else {
-        qapi_free_NetLegacy(object);
-    }
+    qapi_free_Netdev(object);
 
 out:
     error_propagate(errp, err);
diff --git a/qapi/net.json b/qapi/net.json
index fc7c95f6d8..e344825c43 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -453,7 +453,7 @@
 #        'l2tpv3' - since 2.1
 ##
 { 'union': 'Netdev',
-  'base': { 'id': 'str', 'type': 'NetClientDriver' },
+  'base': { '*id': 'str', 'type': 'NetClientDriver' },
   'discriminator': 'type',
   'data': {
     'nic':      'NetLegacyNicOptions',
@@ -467,52 +467,6 @@
     'netmap':   'NetdevNetmapOptions',
     'vhost-user': 'NetdevVhostUserOptions' } }
 
-##
-# @NetLegacy:
-#
-# Captures the configuration of a network device; legacy.
-#
-# @id: identifier for monitor commands
-#
-# @opts: device type specific properties (legacy)
-#
-# Since: 1.2
-##
-{ 'struct': 'NetLegacy',
-  'data': {
-    '*id':   'str',
-    'opts':  'NetLegacyOptions' } }
-
-##
-# @NetLegacyOptionsType:
-#
-# Since: 1.2
-##
-{ 'enum': 'NetLegacyOptionsType',
-  'data': ['none', 'nic', 'user', 'tap', 'l2tpv3', 'socket', 'vde',
-           'bridge', 'netmap', 'vhost-user'] }
-
-##
-# @NetLegacyOptions:
-#
-# Like Netdev, but for use only by the legacy command line options
-#
-# Since: 1.2
-##
-{ 'union': 'NetLegacyOptions',
-  'base': { 'type': 'NetLegacyOptionsType' },
-  'discriminator': 'type',
-  'data': {
-    'nic':      'NetLegacyNicOptions',
-    'user':     'NetdevUserOptions',
-    'tap':      'NetdevTapOptions',
-    'l2tpv3':   'NetdevL2TPv3Options',
-    'socket':   'NetdevSocketOptions',
-    'vde':      'NetdevVdeOptions',
-    'bridge':   'NetdevBridgeOptions',
-    'netmap':   'NetdevNetmapOptions',
-    'vhost-user': 'NetdevVhostUserOptions' } }
-
 ##
 # @NetFilterDirection:
 #
-- 
2.18.1