[pve-devel] [PATCH qemu-server 1/7] PVE/QemuServer: allow mapped usb devices in config

Fabian Grünbichler f.gruenbichler at proxmox.com
Mon Aug 1 14:59:34 CEST 2022


On July 19, 2022 1:46 pm, Dominik Csapak wrote:
> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
> ---
>  PVE/QemuServer.pm     |  2 ++
>  PVE/QemuServer/USB.pm | 21 ++++++++++++++++++++-
>  2 files changed, 22 insertions(+), 1 deletion(-)
> 
> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
> index 7d9cf22..a6ca80d 100644
> --- a/PVE/QemuServer.pm
> +++ b/PVE/QemuServer.pm
> @@ -1069,6 +1069,8 @@ The Host USB device or port or the value 'spice'. HOSTUSBDEVICE syntax is:
>  
>  You can use the 'lsusb -t' command to list existing usb devices.
>  
> +Alternatively, you can used an ID of a mapped usb device.
> +
>  NOTE: This option allows direct access to host hardware. So it is no longer possible to migrate such
>  machines - use with special care.
>  
> diff --git a/PVE/QemuServer/USB.pm b/PVE/QemuServer/USB.pm
> index 3c8da2c..279078a 100644
> --- a/PVE/QemuServer/USB.pm
> +++ b/PVE/QemuServer/USB.pm
> @@ -4,6 +4,7 @@ use strict;
>  use warnings;
>  use PVE::QemuServer::PCI qw(print_pci_addr);
>  use PVE::JSONSchema;
> +use PVE::HardwareMap;
>  use base 'Exporter';
>  
>  our @EXPORT_OK = qw(
> @@ -27,7 +28,25 @@ sub parse_usb_device {
>      } elsif ($value =~ m/^spice$/i) {
>  	$res->{spice} = 1;
>      } else {
> -	return;
> +	# we have no ordinary usb device, must be a mapping
> +	my $device = PVE::HardwareMap::find_device_on_current_node('usb', $value);
> +	return undef if !defined($device);
> +	eval {
> +	    PVE::HardwareMap::assert_device_valid('usb', $device);
> +	};
> +	if (my $err = $@) {
> +	    warn "USB Mapping invalid (hardware probably changed): $err\n";
> +	    return;
> +	}

nit: this would also trigger on deleting such an invalid mapping, which is a 
bit strange?

> +
> +	if ($device->{path}) {
> +	    $res = parse_usb_device($device->{path});
> +	} else {
> +	    $res->{vendorid} = $device->{vendor};
> +	    $res->{productid} = $device->{device};
> +	}
> +
> +	$res->{mapped} = 1;
>      }
>  
>      return $res;
> -- 
> 2.30.2
> 
> 
> 
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