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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>
This commit is contained in:
Amos Kong 2013-04-15 18:55:19 +08:00 committed by Stefan Hajnoczi
parent 8ca27ce2e1
commit c963530a5b
1 changed files with 2 additions and 5 deletions
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7
net/net.c
View File

@ -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++;
}
}