[libvirt] [PATCH v4 08/23] lock_driver: Introduce new VIR_LOCK_MANAGER_OBJECT_TYPE_DAEMON

[John Ferlan]

On 09/10/2018 05:36 AM, Michal Privoznik wrote:
> We will want virtlockd to lock files on behalf of libvirtd and
> not qemu process, because it is libvirtd that needs an exclusive
> access not qemu. This requires new lock context.
> 
> Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
> ---
>  src/locking/lock_driver.h         |   2 +
>  src/locking/lock_driver_lockd.c   | 291 ++++++++++++++++++++++++--------------
>  src/locking/lock_driver_sanlock.c |  37 +++--
>  3 files changed, 214 insertions(+), 116 deletions(-)
> 

[...]

> @@ -156,10 +167,24 @@ virLockManagerLockDaemonConnectionRegister(virLockManagerPtr lock,
>      memset(&args, 0, sizeof(args));
>  
>      args.flags = 0;
> -    memcpy(args.owner.uuid, priv->uuid, VIR_UUID_BUFLEN);
> -    args.owner.name = priv->name;
> -    args.owner.id = priv->id;
> -    args.owner.pid = priv->pid;
> +
> +    switch (priv->type) {
> +    case VIR_LOCK_MANAGER_OBJECT_TYPE_DOMAIN:
> +        memcpy(args.owner.uuid, priv->t.dom.uuid, VIR_UUID_BUFLEN);
> +        args.owner.name = priv->t.dom.name;
> +        args.owner.id = priv->t.dom.id;
> +        args.owner.pid = priv->t.dom.pid;
> +        break;
> +
> +    case VIR_LOCK_MANAGER_OBJECT_TYPE_DAEMON:
> +        memcpy(args.owner.uuid, priv->t.daemon.uuid, VIR_UUID_BUFLEN);
> +        args.owner.name = priv->t.daemon.name;
> +        args.owner.pid = priv->t.daemon.pid;
> +        break;
> +
> +    default:

Should there be an error message? Since virNetClientProgramCall would
provide one on error and it seems callers would expect it... So we don't
end up with an error happened, but we have no clue where.

> +        return -1;
> +    }
>  
>      if (virNetClientProgramCall(program,
>                                  client,

[...]

I suspect you can make the right choice above...

Reviewed-by: John Ferlan <jferlan at redhat.com>

John

[...]