Commit c963530a authored Apr 15, 2013 by Amos Kong Committed by Stefan Hajnoczi May 03, 2013

net: make network client name unique



assign_name() creates a name MODEL.NUM, where MODEL is the client's model,
and NUM is the number of MODELs that already exist.

Markus added NIC naming for non-VLAN clients in commit 53e51d85.
commit d33d93b2 incorrectly added a judgement of net-hub. It caused
net clients created with -netdev get same names.

eg:
 # qemu-upstream -device virtio-net-pci,netdev=h1 -netdev tap,id=h1 \
                    -device virtio-net-pci,netdev=h2 -netdev tap,id=h2 ..
 (qemu) info network
 virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:56
  \ h1: index=0,type=tap,ifname=tap0,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown
 virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:12:34:57
  \ h2: index=0,type=tap,ifname=tap1,script=/etc/qemu-ifup,downscript=/etc/qemu-ifdown

This patch removed the check of nic-hub, and created unique names for
all net clients that have same model.

v2: update commitlog & comments

Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

parent 8ca27ce2

net/net.c

+2 −5

Original line number	Diff line number	Diff line
		@@ -157,8 +157,7 @@ void qemu_macaddr_default_if_unset(MACAddr *macaddr)
		/**
		* Generate a name for net client
		*
		* Only net clients created with the legacy -net option need this. Naming is
		* mandatory for net clients created with -netdev.
		* Only net clients created with the legacy -net option and NICs need this.
		*/
		static char assign_name(NetClientState nc1, const char *model)
		{
		@@ -170,9 +169,7 @@ static char assign_name(NetClientState nc1, const char *model)
		if (nc == nc1) {
		continue;
		}
		/* For compatibility only bump id for net clients on a vlan */
		if (strcmp(nc->model, model) == 0 &&
		net_hub_id_for_client(nc, NULL) == 0) {
		if (strcmp(nc->model, model) == 0) {
		id++;
		}
		}