On 11/24/20 7:36 AM, Markus Armbruster wrote:
> Markus Armbruster <arm...@redhat.com> writes:
>
>> Yuri Benditovich <yuri.benditov...@daynix.com> writes:
>>
>>> Please confirm that this patch is intended to solve only the problem with
>>> hmp (and disallow duplicated ids)
>>
>> The intent is to reject duplicate ID and to accept non-duplicate ID, no
>> matter how the device is created (CLI, HMP, QMP) or a prior instance was
>> deleted (HMP, QMP).
>>
>>> With it the netdev that was added from qemu's command line and was deleted
>>> (for example by hmp) still can't be created, correct?
>>
>> Yet another case; back to the drawing board...
>
> Next try. Hope this is one holds water :)
>
>
> diff --git a/net/net.c b/net/net.c
> index 794c652282..c1dc75fc37 100644
> --- a/net/net.c
> +++ b/net/net.c
> @@ -978,6 +978,7 @@ static int (* const
> net_client_init_fun[NET_CLIENT_DRIVER__MAX])(
> static int net_client_init1(const Netdev *netdev, bool is_netdev, Error
> **errp)
> {
> NetClientState *peer = NULL;
> + NetClientState *nc;
>
> if (is_netdev) {
> if (netdev->type == NET_CLIENT_DRIVER_NIC ||
> @@ -1005,6 +1006,12 @@ static int net_client_init1(const Netdev *netdev, bool
> is_netdev, Error **errp)
> }
> }
>
> + nc = qemu_find_netdev(netdev->id);
> + if (nc) {
> + error_setg(errp, "Duplicate ID '%s'", netdev->id);
> + return -1;
> + }
Here, we fail if qemu_find_netdev() succeeded, regardless of whether
is_netdev was set...
> +
> if (net_client_init_fun[netdev->type](netdev, netdev->id, peer, errp) <
> 0) {
> /* FIXME drop when all init functions store an Error */
> if (errp && !*errp) {
> @@ -1015,8 +1022,6 @@ static int net_client_init1(const Netdev *netdev, bool
> is_netdev, Error **errp)
> }
>
> if (is_netdev) {
> - NetClientState *nc;
> -
> nc = qemu_find_netdev(netdev->id);
> assert(nc);
and here, when is_netdev is set, we expect qemu_find_netdev() to
succeed. Does the first hunk need to be 'if (nc && !is_netdev)' ?
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3226
Virtualization: qemu.org | libvirt.org
