From 90d87a33c700e0634bc4343fa7a034f909662254 Mon Sep 17 00:00:00 2001
From: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Date: Tue, 24 Jul 2012 16:35:06 +0100
Subject: [PATCH] net: Look up 'vlan' net clients using hubs

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
---
 net.c       | 28 +---------------------------
 net/hub.c   | 23 +++++++++++++++++++++++
 net/hub.h   |  1 +
 net/slirp.c |  7 +++++--
 4 files changed, 30 insertions(+), 29 deletions(-)

diff --git a/net.c b/net.c
index 4feca6c0b..f88d38d52 100644
--- a/net.c
+++ b/net.c
@@ -315,32 +315,6 @@ void qemu_del_vlan_client(VLANClientState *vc)
     qemu_free_vlan_client(vc);
 }
 
-VLANClientState *
-qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id,
-                              const char *client_str)
-{
-    VLANState *vlan;
-    VLANClientState *vc;
-
-    vlan = qemu_find_vlan(vlan_id, 0);
-    if (!vlan) {
-        monitor_printf(mon, "unknown VLAN %d\n", vlan_id);
-        return NULL;
-    }
-
-    QTAILQ_FOREACH(vc, &vlan->clients, next) {
-        if (!strcmp(vc->name, client_str)) {
-            break;
-        }
-    }
-    if (!vc) {
-        monitor_printf(mon, "can't find device %s on VLAN %d\n",
-                       client_str, vlan_id);
-    }
-
-    return vc;
-}
-
 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
 {
     VLANClientState *nc;
@@ -994,7 +968,7 @@ void net_host_device_remove(Monitor *mon, const QDict *qdict)
     int vlan_id = qdict_get_int(qdict, "vlan_id");
     const char *device = qdict_get_str(qdict, "device");
 
-    vc = qemu_find_vlan_client_by_name(mon, vlan_id, device);
+    vc = net_hub_find_client_by_name(vlan_id, device);
     if (!vc) {
         return;
     }
diff --git a/net/hub.c b/net/hub.c
index ee9d87831..9806a592f 100644
--- a/net/hub.c
+++ b/net/hub.c
@@ -164,6 +164,29 @@ VLANClientState *net_hub_add_port(int hub_id, const char *name)
     return &port->nc;
 }
 
+/**
+ * Find a specific client on a hub
+ */
+VLANClientState *net_hub_find_client_by_name(int hub_id, const char *name)
+{
+    NetHub *hub;
+    NetHubPort *port;
+    VLANClientState *peer;
+
+    QLIST_FOREACH(hub, &hubs, next) {
+        if (hub->id == hub_id) {
+            QLIST_FOREACH(port, &hub->ports, next) {
+                peer = port->nc.peer;
+
+                if (peer && strcmp(peer->name, name) == 0) {
+                    return peer;
+                }
+            }
+        }
+    }
+    return NULL;
+}
+
 /**
  * Print hub configuration
  */
diff --git a/net/hub.h b/net/hub.h
index a5fa2ba89..677085069 100644
--- a/net/hub.h
+++ b/net/hub.h
@@ -20,6 +20,7 @@
 int net_init_hubport(const NetClientOptions *opts, const char *name,
                      VLANClientState *peer);
 VLANClientState *net_hub_add_port(int hub_id, const char *name);
+VLANClientState *net_hub_find_client_by_name(int hub_id, const char *name);
 void net_hub_info(Monitor *mon);
 int net_hub_id_for_client(VLANClientState *nc, int *id);
 
diff --git a/net/slirp.c b/net/slirp.c
index 97e380cb2..7682ac7b5 100644
--- a/net/slirp.c
+++ b/net/slirp.c
@@ -30,6 +30,7 @@
 #include <sys/wait.h>
 #endif
 #include "net.h"
+#include "net/hub.h"
 #include "monitor.h"
 #include "qemu_socket.h"
 #include "slirp/libslirp.h"
@@ -284,7 +285,7 @@ static SlirpState *slirp_lookup(Monitor *mon, const char *vlan,
 
     if (vlan) {
         VLANClientState *nc;
-        nc = qemu_find_vlan_client_by_name(mon, strtol(vlan, NULL, 0), stack);
+        nc = net_hub_find_client_by_name(strtol(vlan, NULL, 0), stack);
         if (!nc) {
             return NULL;
         }
@@ -679,8 +680,10 @@ void do_info_usernet(Monitor *mon)
     SlirpState *s;
 
     QTAILQ_FOREACH(s, &slirp_stacks, entry) {
+        int id;
+        bool got_vlan_id = net_hub_id_for_client(&s->nc, &id) == 0;
         monitor_printf(mon, "VLAN %d (%s):\n",
-                       s->nc.vlan ? s->nc.vlan->id : -1,
+                       got_vlan_id ? id : -1,
                        s->nc.name);
         slirp_connection_info(s->slirp, mon);
     }
-- 
2.39.2