[pve-devel] [PATCH qemu-server 4/7] PVE/API2/Qemu: add permission checks for mapped pci devices

Dominik Csapak d.csapak at proxmox.com
Tue Jul 19 13:46:24 CEST 2022


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 '$opt' config for non-mapped devices\n";
+		    }
+		    PVE::QemuServer::PCI::parse_hostpci($param->{$opt});
 		    $conf->{pending}->{$opt} = $param->{$opt};
 		} else {
 		    $conf->{pending}->{$opt} = $param->{$opt};
-- 
2.30.2





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