api: add reboot api call

this creates a reboot request file (inspired by pve-container)
and relies on the 'qm cleanup' call by the qmeventd to detect
and restart the vm afterwards

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>

PVE/API2/Qemu.pm

@@ -1910,6 +1910,7 @@ __PACKAGE__->register_method({
 	    { subdir => 'reset' },
 	    { subdir => 'shutdown' },
 	    { subdir => 'suspend' },
+	    { subdir => 'reboot' },
 	    ];
 
 	return $res;
@@ -2333,6 +2334,64 @@ __PACKAGE__->register_method({
 	}
     }});
 
+__PACKAGE__->register_method({
+    name => 'vm_reboot',
+    path => '{vmid}/status/reboot',
+    method => 'POST',
+    protected => 1,
+    proxyto => 'node',
+    description => "Reboot the VM by shutting it down, and starting it again. Applies pending changes.",
+    permissions => {
+	check => ['perm', '/vms/{vmid}', [ 'VM.PowerMgmt' ]],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	    vmid => get_standard_option('pve-vmid',
+					{ completion => \&PVE::QemuServer::complete_vmid_running }),
+	    timeout => {
+		description => "Wait maximal timeout seconds for the shutdown.",
+		type => 'integer',
+		minimum => 0,
+		optional => 1,
+	    },
+	},
+    },
+    returns => {
+	type => 'string',
+    },
+    code => sub {
+	my ($param) = @_;
+
+	my $rpcenv = PVE::RPCEnvironment::get();
+	my $authuser = $rpcenv->get_user();
+
+	my $node = extract_param($param, 'node');
+	my $vmid = extract_param($param, 'vmid');
+
+	my $qmpstatus = eval {
+	    PVE::QemuServer::vm_qmp_command($vmid, { execute => "query-status" }, 0);
+	};
+	my $err = $@ if $@;
+
+	if (!$err && $qmpstatus->{status} eq "paused") {
+	    die "VM is paused - cannot shutdown\n";
+	}
+
+	die "VM $vmid not running\n" if !PVE::QemuServer::check_running($vmid);
+
+	my $realcmd = sub {
+	    my $upid = shift;
+
+	    syslog('info', "requesting reboot of VM $vmid: $upid\n");
+	    PVE::QemuServer::vm_reboot($vmid, $param->{timeout});
+	    return;
+	};
+
+	return $rpcenv->fork_worker('qmreboot', $vmid, $authuser, $realcmd);
+    }});
+
 __PACKAGE__->register_method({
     name => 'vm_suspend',
     path => '{vmid}/status/suspend',

PVE/CLI/qm.pm

@@ -998,6 +998,8 @@ our $cmddef = {
 
     shutdown => [ "PVE::API2::Qemu", 'vm_shutdown', ['vmid'], { node => $nodename }, $upid_exit ],
 
+    reboot => [ "PVE::API2::Qemu", 'vm_reboot', ['vmid'], { node => $nodename }, $upid_exit ],
+
     suspend => [ "PVE::API2::Qemu", 'vm_suspend', ['vmid'], { node => $nodename }, $upid_exit ],
 
     resume => [ "PVE::API2::Qemu", 'vm_resume', ['vmid'], { node => $nodename }, $upid_exit ],

PVE/QemuServer.pm

@@ -5870,6 +5870,22 @@ sub vm_stop {
    });
 }
 
+sub vm_reboot {
+    my ($vmid, $timeout) = @_;
+
+    PVE::QemuConfig->lock_config($vmid, sub {
+
+	# only reboot if running, as qmeventd starts it again on a stop event
+	return if !check_running($vmid);
+
+	create_reboot_request($vmid);
+
+	my $storecfg = PVE::Storage::config();
+	_do_vm_stop($storecfg, $vmid, undef, undef, $timeout, 1);
+
+   });
+}
+
 sub vm_suspend {
     my ($vmid, $skiplock, $includestate, $statestorage) = @_;