From af775f107327930e5d81bd63b5c682bb6925ba21 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 2 Oct 2014 16:44:07 +0100
Subject: [PATCH] RHEL 7: Revert "launch: libvirt: Use qemu-bridge-helper to
 implement a full network (RHBZ#1148012)."

This reverts commit 224de20b9a8d5ea56f6337f19b4ca237bb88eca0.
---
 lib/guestfs.pod      | 10 ----------
 lib/launch-libvirt.c | 44 +++++++++++++++++++++-----------------------
 2 files changed, 21 insertions(+), 33 deletions(-)

diff --git a/lib/guestfs.pod b/lib/guestfs.pod
index 684f8dc6c..0b8c9f7d2 100644
--- a/lib/guestfs.pod
+++ b/lib/guestfs.pod
@@ -1451,16 +1451,6 @@ On Fedora, install C<kernel-debuginfo> for the C<vmlinux> file
 (containing symbols).  Make sure the symbols precisely match the
 kernel being used.
 
-=head3 network_bridge
-
-The libvirt backend supports:
-
- export LIBGUESTFS_BACKEND_SETTINGS=network_bridge=virbrX
-
-This allows you to override the bridge that is connected to when the
-network is enabled.  The default is C<virbr0>.  See also
-L</guestfs_set_network>.
-
 =head2 ATTACHING TO RUNNING DAEMONS
 
 I<Note (1):> This is B<highly experimental> and has a tendency to eat
diff --git a/lib/launch-libvirt.c b/lib/launch-libvirt.c
index 844023b80..f0f52fba0 100644
--- a/lib/launch-libvirt.c
+++ b/lib/launch-libvirt.c
@@ -115,7 +115,6 @@ struct backend_libvirt_data {
   char *selinux_label;
   char *selinux_imagelabel;
   bool selinux_norelabel_disks;
-  char *network_bridge;
   char name[DOMAIN_NAME_LEN];   /* random name */
   bool is_kvm;                  /* false = qemu, true = kvm (from capabilities)*/
   struct version libvirt_version; /* libvirt version */
@@ -437,12 +436,6 @@ launch_libvirt (guestfs_h *g, void *datav, const char *libvirt_uri)
     guestfs_get_backend_setting (g, "internal_libvirt_imagelabel");
   data->selinux_norelabel_disks =
     guestfs_int_get_backend_setting_bool (g, "internal_libvirt_norelabel_disks");
-  if (g->enable_network) {
-    data->network_bridge =
-      guestfs_get_backend_setting (g, "network_bridge");
-    if (!data->network_bridge)
-      data->network_bridge = safe_strdup (g, "virbr0");
-  }
   guestfs_pop_error_handler (g);
 
   if (g->enable_network && check_bridge_exists (g, data->network_bridge) == -1)
@@ -1402,19 +1395,6 @@ construct_libvirt_xml_devices (guestfs_h *g,
       } end_element ();
     } end_element ();
 
-    /* Connect to libvirt bridge (see: RHBZ#1148012). */
-    if (g->enable_network) {
-      start_element ("interface") {
-        attribute ("type", "bridge");
-        start_element ("source") {
-          attribute ("bridge", params->data->network_bridge);
-        } end_element ();
-        start_element ("model") {
-          attribute ("type", "virtio");
-        } end_element ();
-      } end_element ();
-    }
-
     /* Libvirt adds some devices by default.  Indicate to libvirt
      * that we don't want them.
      */
@@ -1810,6 +1790,27 @@ construct_libvirt_xml_qemu_cmdline (guestfs_h *g,
       attribute ("value", tmpdir);
     } end_element ();
 
+    /* Workaround because libvirt user networking cannot specify "net="
+     * parameter.
+     */
+    if (g->enable_network) {
+      start_element ("qemu:arg") {
+        attribute ("value", "-netdev");
+      } end_element ();
+
+      start_element ("qemu:arg") {
+        attribute ("value", "user,id=usernet,net=169.254.0.0/16");
+      } end_element ();
+
+      start_element ("qemu:arg") {
+        attribute ("value", "-device");
+      } end_element ();
+
+      start_element ("qemu:arg") {
+        attribute ("value", VIRTIO_DEVICE_NAME ("virtio-net") ",netdev=usernet");
+      } end_element ();
+    }
+
     /* The qemu command line arguments requested by the caller. */
     for (hp = g->hv_params; hp; hp = hp->next) {
       start_element ("qemu:arg") {
@@ -2135,9 +2136,6 @@ shutdown_libvirt (guestfs_h *g, void *datav, int check_for_errors)
   free (data->selinux_imagelabel);
   data->selinux_imagelabel = NULL;
 
-  free (data->network_bridge);
-  data->network_bridge = NULL;
-
   for (i = 0; i < data->nr_secrets; ++i)
     free (data->secrets[i].secret);
   free (data->secrets);
-- 
2.17.1