[Qemu-devel] [PATCH 2/6] Assign a name to each VLAN client

[Mark McLoughlin <markmc@redhat.com>]

Automatically assign a name to each vlan client based on its model,
e.g. e1000.0, tap.3 or vde.1.

This name is intended to be used by the forthcoming 'set_link'
monitor command.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
---
 net.c |   21 +++++++++++++++++++++
 net.h |    1 +
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/net.c b/net.c
index f3c2b89..c268233 100644
--- a/net.c
+++ b/net.c
@@ -296,6 +296,25 @@ static int parse_unix_path(struct sockaddr_un *uaddr, const char *str)
 }
 #endif
 
+static char *assign_name(VLANClientState *vc1, const char *model)
+{
+    VLANState *vlan;
+    char buf[256];
+    int id = 0;
+
+    for (vlan = first_vlan; vlan; vlan = vlan->next) {
+        VLANClientState *vc;
+
+        for (vc = vlan->first_client; vc; vc = vc->next)
+            if (vc != vc1 && strcmp(vc->model, model) == 0)
+                id++;
+    }
+
+    snprintf(buf, sizeof(buf), "%s.%d", model, id);
+
+    return strdup(buf);
+}
+
 VLANClientState *qemu_new_vlan_client(VLANState *vlan,
                                       const char *model,
                                       IOReadHandler *fd_read,
@@ -307,6 +326,7 @@ VLANClientState *qemu_new_vlan_client(VLANState *vlan,
     if (!vc)
         return NULL;
     vc->model = strdup(model);
+    vc->name = assign_name(vc, model);
     vc->fd_read = fd_read;
     vc->fd_can_read = fd_can_read;
     vc->opaque = opaque;
@@ -327,6 +347,7 @@ void qemu_del_vlan_client(VLANClientState *vc)
     while (*pvc != NULL)
         if (*pvc == vc) {
             *pvc = vc->next;
+            free(vc->name);
             free(vc->model);
             free(vc);
             break;
diff --git a/net.h b/net.h
index a2c6a50..078dd18 100644
--- a/net.h
+++ b/net.h
@@ -19,6 +19,7 @@ struct VLANClientState {
     struct VLANClientState *next;
     struct VLANState *vlan;
     char *model;
+    char *name;
     char info_str[256];
 };
 
-- 
1.6.0.6