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print meaningful error message in case of --disable-vhost-net 

When qemu gets compiled without support of vhost-net, any attempt
to use it fails with a very clear error message:

 qemu-system-x86_64: -netdev ...,vhost=on: vhost-net requested but could not be initialized

there's absolutely no reason given _why_ it coult not be
initialized, and even strace'ing the process in question
does not reveal any errors.  So print a message telling
what's going on.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael Tokarev 2011-06-10 00:55:57 +04:00 committed by Michael S. Tsirkin
parent b91cb44215
commit 35f7546206
1 changed files with 2 additions and 0 deletions
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2
hw/vhost_net.c
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@ -15,6 +15,7 @@
#include "virtio-net.h"
#include "vhost_net.h"
#include "qemu-error.h"
#include "config.h"
@ -203,6 +204,7 @@ void vhost_net_cleanup(struct vhost_net *net)
struct vhost_net *vhost_net_init(VLANClientState *backend, int devfd,
bool force)
{
error_report("vhost-net support is not compiled in");
return NULL;
}