[pve-devel] [PATCH qemu-server 4/7] PVE/API2/Qemu: add permission checks for mapped pci devices
Fabian Grünbichler
f.gruenbichler at proxmox.com
Mon Aug 1 15:01:30 CEST 2022
On July 19, 2022 1:46 pm, Dominik Csapak wrote:
> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
> ---
> PVE/API2/Qemu.pm | 54 ++++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 52 insertions(+), 2 deletions(-)
>
> diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
> index aa7ddea..a8029c2 100644
> --- a/PVE/API2/Qemu.pm
> +++ b/PVE/API2/Qemu.pm
> @@ -26,6 +26,7 @@ use PVE::QemuServer::Drive;
> use PVE::QemuServer::ImportDisk;
> use PVE::QemuServer::Monitor qw(mon_cmd);
> use PVE::QemuServer::Machine;
> +use PVE::QemuServer::PCI;
> use PVE::QemuServer::USB qw(parse_usb_device);
> use PVE::QemuMigrate;
> use PVE::RPCEnvironment;
> @@ -583,6 +584,26 @@ my $check_vm_create_usb_perm = sub {
> return 1;
> };
>
> +my $check_vm_create_hostpci_perm = sub {
> + my ($rpcenv, $authuser, $vmid, $pool, $param) = @_;
> +
> + return 1 if $authuser eq 'root at pam';
> +
> + foreach my $opt (keys %{$param}) {
> + next if $opt !~ m/^hostpci\d+$/;
> +
> + my $device = PVE::JSONSchema::parse_property_string('pve-qm-hostpci', $param->{$opt});
> + if ($device->{host} !~ m/:/) {
> + $rpcenv->check_hw_perm($authuser, $device->{host}, ['Hardware.Use']);
> + $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.HWType']);
> + } else {
> + die "only root can set '$opt' config for non-mapped devices\n";
> + }
> + }
> +
> + return 1;
> +};
> +
> my $check_vm_modify_config_perm = sub {
> my ($rpcenv, $authuser, $vmid, $pool, $key_list) = @_;
>
> @@ -593,7 +614,7 @@ my $check_vm_modify_config_perm = sub {
> # else, as there the permission can be value dependend
> next if PVE::QemuServer::is_valid_drivename($opt);
> next if $opt eq 'cdrom';
> - next if $opt =~ m/^(?:unused|serial|usb)\d+$/;
> + next if $opt =~ m/^(?:unused|serial|usb|hostpci)\d+$/;
>
>
> if ($cpuoptions->{$opt} || $opt =~ m/^numa\d+$/) {
> @@ -621,7 +642,7 @@ my $check_vm_modify_config_perm = sub {
> # also needs privileges on the storage, that will be checked later
> $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk', 'VM.PowerMgmt' ]);
> } else {
> - # catches hostpci\d+, args, lock, etc.
> + # catches args, lock, etc.
> # new options will be checked here
> die "only root can set '$opt' config\n";
> }
> @@ -856,6 +877,7 @@ __PACKAGE__->register_method({
>
> &$check_vm_create_serial_perm($rpcenv, $authuser, $vmid, $pool, $param);
> &$check_vm_create_usb_perm($rpcenv, $authuser, $vmid, $pool, $param);
> + &$check_vm_create_hostpci_perm($rpcenv, $authuser, $vmid, $pool, $param);
>
> &$check_cpu_model_access($rpcenv, $authuser, $param);
>
> @@ -1569,6 +1591,16 @@ my $update_vm_api = sub {
> }
> PVE::QemuConfig->add_to_pending_delete($conf, $opt, $force);
> PVE::QemuConfig->write_config($vmid, $conf);
> + } elsif ($opt =~ m/^hostpci\d+$/) {
> + my $olddevice = PVE::JSONSchema::parse_property_string('pve-qm-hostpci', $val);
> + if ($olddevice->{host} !~ m/:/) {
> + $rpcenv->check_hw_perm($authuser, $olddevice->{host}, ['Hardware.Use']);
> + $rpcenv->check_vm_perm($authuser, $vmid, undef, ['VM.Config.HWType']);
> + } elsif ($authuser ne 'root at pam') {
> + die "only root can set '$opt' config for non-mapped devices\n";
> + }
> + PVE::QemuConfig->add_to_pending_delete($conf, $opt, $force);
> + PVE::QemuConfig->write_config($vmid, $conf);
> } else {
> PVE::QemuConfig->add_to_pending_delete($conf, $opt, $force);
> PVE::QemuConfig->write_config($vmid, $conf);
> @@ -1651,6 +1683,24 @@ my $update_vm_api = sub {
> } elsif ($authuser ne 'root at pam') {
> die "only root can modify '$opt' config for real devices\n";
> }
> +
> + $conf->{pending}->{$opt} = $param->{$opt};
> + } elsif ($opt =~ m/^hostpci\d+$/) {
> + my $olddevice;
> + if (defined($conf->{$opt})) {
> + $olddevice = PVE::JSONSchema::parse_property_string('pve-qm-hostpci', $conf->{$opt});
> + }
> + my $newdevice = PVE::JSONSchema::parse_property_string('pve-qm-hostpci', $param->{$opt});
> + if ((!defined($olddevice) || $olddevice->{host} !~ m/:/) && $newdevice->{host} !~ m/:/) {
> + if (defined($olddevice)) {
> + $rpcenv->check_hw_perm($authuser, $olddevice->{host}, ['Hardware.Use']);
> + }
> + $rpcenv->check_hw_perm($authuser, $newdevice->{host}, ['Hardware.Use']);
> + $rpcenv->check_vm_perm($authuser, $vmid, undef, ['VM.Config.HWType']);
> + } elsif ($authuser ne 'root at pam') {
> + die "only root can set '$opt' config for non-mapped devices\n";
> + }
nit: this is a bit confusing to read, and might benefit from splitting the
check for old and for new, like so
if (defined($old)) {
parse old
check old || check root
}
parse new
check new || check root
check VM.Config.HWType
> + PVE::QemuServer::PCI::parse_hostpci($param->{$opt});
> $conf->{pending}->{$opt} = $param->{$opt};
> } else {
> $conf->{pending}->{$opt} = $param->{$opt};
> --
> 2.30.2
>
>
>
> _______________________________________________
> pve-devel mailing list
> pve-devel at lists.proxmox.com
> https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
>
>
>
More information about the pve-devel
mailing list