Add 'set_link' monitor command (Mark McLoughlin)
Add a monitor command to setting a given network device's link status
to 'up' or 'down'.
Allows simulation of network cable disconnect.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6247 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/net.c b/net.c
index 47f13ca..bae8bef 100644
--- a/net.c
+++ b/net.c
@@ -387,12 +387,15 @@
VLANState *vlan = vc1->vlan;
VLANClientState *vc;
+ if (vc1->link_down)
+ return;
+
#ifdef DEBUG_NET
printf("vlan %d send:\n", vlan->id);
hex_dump(stdout, buf, size);
#endif
for(vc = vlan->first_client; vc != NULL; vc = vc->next) {
- if (vc != vc1) {
+ if (vc != vc1 && !vc->link_down) {
vc->fd_read(vc->opaque, buf, size);
}
}
@@ -1692,6 +1695,32 @@
}
}
+int do_set_link(const char *name, const char *up_or_down)
+{
+ VLANState *vlan;
+ VLANClientState *vc = NULL;
+
+ for (vlan = first_vlan; vlan != NULL; vlan = vlan->next)
+ for (vc = vlan->first_client; vc != NULL; vc = vc->next)
+ if (strcmp(vc->name, name) == 0)
+ break;
+
+ if (!vc) {
+ term_printf("could not find network device '%s'", name);
+ return 0;
+ }
+
+ if (strcmp(up_or_down, "up") == 0)
+ vc->link_down = 0;
+ else if (strcmp(up_or_down, "down") == 0)
+ vc->link_down = 1;
+ else
+ term_printf("invalid link status '%s'; only 'up' or 'down' valid\n",
+ up_or_down);
+
+ return 1;
+}
+
void net_cleanup(void)
{
VLANState *vlan;