[Qemu-devel] [PATCH 1/2] Fix automatically assigned network names for netdev

[Markus Armbruster <armbru@redhat.com>]

If a network client doesn't have a name, we make one up, with
assign_name().  assign_name() creates a name MODEL.NUM, where MODEL is
the client's model, and NUM is the number of MODELs that already
exist.

Bug: it misses clients that are not on a VLAN, i.e. netdevs and the
NICs using them:

    $ qemu-system-x86_64 -nodefaults -vnc :0 -S -monitor stdio -netdev user,id=hostnet0 -net nic,netdev=hostnet0 -netdev user,id=hostnet1 -net nic,netdev=hostnet1
    QEMU 0.14.50 monitor - type 'help' for more information
    (qemu) info network
    Devices not on any VLAN:
      hostnet0: net=10.0.2.0, restricted=n peer=e1000.0
      hostnet1: net=10.0.2.0, restricted=n peer=e1000.0
      e1000.0: model=e1000,macaddr=52:54:00:12:34:56 peer=hostnet0
      e1000.0: model=e1000,macaddr=52:54:00:12:34:57 peer=hostnet1

Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 net.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/net.c b/net.c
index 4f777c3..8754627 100644
--- a/net.c
+++ b/net.c
@@ -150,12 +150,11 @@ void qemu_macaddr_default_if_unset(MACAddr *macaddr)
 static char *assign_name(VLANClientState *vc1, const char *model)
 {
     VLANState *vlan;
+    VLANClientState *vc;
     char buf[256];
     int id = 0;
 
     QTAILQ_FOREACH(vlan, &vlans, next) {
-        VLANClientState *vc;
-
         QTAILQ_FOREACH(vc, &vlan->clients, next) {
             if (vc != vc1 && strcmp(vc->model, model) == 0) {
                 id++;
@@ -163,6 +162,12 @@ static char *assign_name(VLANClientState *vc1, const char *model)
         }
     }
 
+    QTAILQ_FOREACH(vc, &non_vlan_clients, next) {
+        if (vc != vc1 && strcmp(vc->model, model) == 0) {
+            id++;
+        }
+    }
+
     snprintf(buf, sizeof(buf), "%s.%d", model, id);
 
     return qemu_strdup(buf);
-- 
1.7.2.3