XEN3 handles xm shutdown?

Hello,

Just started testing Xen 3.0.2 before I upgrade from my
existing Xen
2.0.7. I have just compiled a NetBSD Dom-U kernel from
-current
sources (with today's date) and I have powerd running but
it looks
like the guest is not yet handling the xm shutdown from the
Dom-0.
Have I missed something or is this functionality not
available yet?

Regards

Chris

On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> Hello,
> 
> Just started testing Xen 3.0.2 before I upgrade from my
existing Xen
> 2.0.7. I have just compiled a NetBSD Dom-U kernel from
-current
> sources (with today's date) and I have powerd running
but it looks
> like the guest is not yet handling the xm shutdown from
the Dom-0.
> Have I missed something or is this functionality not
available yet?

It's not available yet. I don't even have an idea how Xen3
tools pass this
information to a domU.

-- 
Manuel Bouyer <bouyerantioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la
difference
--

On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> Hello,
> 
> Just started testing Xen 3.0.2 before I upgrade from my
existing Xen
> 2.0.7. I have just compiled a NetBSD Dom-U kernel from
-current
> sources (with today's date) and I have powerd running
but it looks
> like the guest is not yet handling the xm shutdown from
the Dom-0.
> Have I missed something or is this functionality not
available yet?

It's not available yet. I don't even have an idea how Xen3
tools pass this
information to a domU.

-- 
Manuel Bouyer <bouyerantioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la
difference
--

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */

> On Sat, Jul 08, 2006 at 05:37:44PM -0500, Chris Brookes
wrote:
> > Hello,
> > 
> > Just started testing Xen 3.0.2 before I upgrade
from my existing Xen
> > 2.0.7. I have just compiled a NetBSD Dom-U kernel
from -current
> > sources (with today's date) and I have powerd
running but it looks
> > like the guest is not yet handling the xm shutdown
from the Dom-0.
> > Have I missed something or is this functionality
not available yet?
> 
> It's not available yet. I don't even have an idea how
Xen3 tools pass this
> information to a domU.

via "control/shutdown" in xenstore.  patch
attached.

a question: why xenbus_watch::node is not const?

YAMAMOTO Takashi
Index: xenbus/xenbus_probe.c
============================================================
=======
--- xenbus/xenbus_probe.c	(revision 1699)
+++ xenbus/xenbus_probe.c	(working copy)
 -52,6
+52,7  __KERNEL_RCSID(0, "$NetBSD: xenbus_probe
 #include <machine/hypervisor.h>
 #include <machine/xenbus.h>
 #include <machine/evtchn.h>
+#include <machine/shutdown_xenbus.h>
 
 #include "xenbus_comms.h"
 
 -504,6
+505,7  xenbus_probe(void *unused)
 	strcpy(be_watch.node, "backend");
 	be_watch.xbw_callback = backend_changed;
 	register_xenbus_watch(&be_watch);
+	shutdown_xenbus_setup();
 
 	/* Notify others that xenstore is up */
 	//notifier_call_chain(&xenstore_chain, 0, NULL);
Index: conf/files.xen
============================================================
=======
--- conf/files.xen	(revision 1728)
+++ conf/files.xen	(working copy)
 -125,6
+125,7  file	arch/xen/i386/mainbus.c		mainbus
 device	hypervisor { }: isabus, pcibus, sysmon_power,
xendevbus, acpibus
 attach hypervisor at hypervisorbus
 file	arch/xen/xen/hypervisor.c	hypervisor needs-flag
+file	arch/xen/xen/shutdown_xenbus.c	hypervisor & xen3
 
 # Xenbus (xen3 only)
 device xenbus {[id = -1]}
Index: xen/hypervisor.c
============================================================
=======
--- xen/hypervisor.c	(revision 1742)
+++ xen/hypervisor.c	(working copy)
 -69,7
+69,10  __KERNEL_RCSID(0, "$NetBSD: hypervisor.c
 #include <sys/systm.h>
 #include <sys/device.h>
 #include <sys/malloc.h>
+
+#ifndef XEN3
 #include <dev/sysmon/sysmonvar.h>
+#endif
 
 #include "xenbus.h"
 #include "xencons.h"
 -191,7
+194,6  struct  x86_isa_chipset x86_isa_chipset;
 /* shutdown/reboot message stuff */
 #ifndef XEN3
 static void hypervisor_shutdown_handler(ctrl_msg_t *,
unsigned long);
-#endif
 static struct sysmon_pswitch hysw_shutdown = {
 	.smpsw_type = PSWITCH_TYPE_POWER,
 	.smpsw_name = "hypervisor",
 -200,6
+202,7  static struct sysmon_pswitch hysw_reboot
 	.smpsw_type = PSWITCH_TYPE_RESET,
 	.smpsw_name = "hypervisor",
 };
+#endif
 
 /*
  * Probe for the hypervisor; always succeeds.
 -361,12
+364,12  hypervisor_attach(parent, self, aux)
 #endif
 	}
 #endif
+#ifndef XEN3
 	if (sysmon_pswitch_register(&hysw_reboot) != 0 ||
 	    sysmon_pswitch_register(&hysw_shutdown) != 0)
 		printf("%s: unable to register with
sysmon\n",
 		    self->dv_xname);
-#ifndef XEN3
-	else 
+	else
 		ctrl_if_register_receiver(CMSG_SHUTDOWN,
 		    hypervisor_shutdown_handler,
CALLBACK_IN_BLOCKING_CONTEXT);
 #endif
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Copyright (c) 2005 Manuel Bouyer.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 * 3. All advertising materials mentioning features or use
of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Manuel
Bouyer.
 * 4. The name of the author may not be used to endorse or
promote products
 *    derived from this software without specific prior
written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
 *
 */

/*
 * watch "control/shutdown" and generate sysmon
events.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD$");

#include <sys/param.h>
#include <sys/malloc.h>

#include <dev/sysmon/sysmonvar.h>

#include <machine/xenbus.h>
#include <machine/shutdown_xenbus.h>

#define	SHUTDOWN_PATH	"control"
#define	SHUTDOWN_NAME	"shutdown"

static struct sysmon_pswitch xenbus_power = {
	.smpsw_type = PSWITCH_TYPE_POWER,
	.smpsw_name = "xenbus",
};
static struct sysmon_pswitch xenbus_reset = {
	.smpsw_type = PSWITCH_TYPE_RESET,
	.smpsw_name = "xenbus",
};

static void
xenbus_shutdown_handler(struct xenbus_watch *watch, const
char **vec,
    unsigned int len)
{

	struct xenbus_transaction *xbt;
	int error;
	char *reqstr;
	unsigned int reqstrlen;

again:
	xbt = xenbus_transaction_start();
	if (xbt == NULL) {
		return;
	}
	error = xenbus_read(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME,
	    &reqstrlen, &reqstr);
	if (error) {
		if (error != ENOENT) {
			printf("%s: xenbus_read %d\n", __func__,
error);
		}
		error = xenbus_transaction_end(xbt, 1);
		if (error != 0) {
			printf("%s: xenbus_transaction_end 1 %d\n",
			    __func__, error);
		}
		return;
	}
	KASSERT(strlen(reqstr) == reqstrlen);
	error = xenbus_rm(xbt, SHUTDOWN_PATH, SHUTDOWN_NAME);
	if (error) {
		printf("%s: xenbus_rm %d\n", __func__,
error);
	}
	error = xenbus_transaction_end(xbt, 0);
	if (error == EAGAIN) {
		free(reqstr, M_DEVBUF);
		goto again;
	}
	if (error != 0) {
		printf("%s: xenbus_transaction_end 2 %d\n",
__func__, error);
	}
	if (strcmp(reqstr, "poweroff") == 0) {
		sysmon_pswitch_event(&xenbus_power,
PSWITCH_EVENT_PRESSED);
	} else if (strcmp(reqstr, "reboot") == 0) {
		sysmon_pswitch_event(&xenbus_reset,
PSWITCH_EVENT_PRESSED);
	} else {
		/* XXX halt, suspend */
		printf("ignore shutdown request: %s\n",
reqstr);
	}
	free(reqstr, M_DEVBUF);
}

static struct xenbus_watch xenbus_shutdown_watch = {
	.node = __UNCONST(SHUTDOWN_PATH "/"
SHUTDOWN_NAME), /* XXX */
	.xbw_callback = xenbus_shutdown_handler,
};

void
shutdown_xenbus_setup(void)
{

	if (sysmon_pswitch_register(&xenbus_power) != 0 ||
	    sysmon_pswitch_register(&xenbus_reset) != 0) {
		printf("%s: unable to register with
sysmon\n", __func__);
		return;
	}
	if (register_xenbus_watch(&xenbus_shutdown_watch)) {
		printf("%s: unable to watch
control/shutdown\n", __func__);
	}
}
/*	$Id$	*/

/*-
 * Copyright (c)2006 YAMAMOTO Takashi,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with
or without
 * modification, are permitted provided that the following
conditions
 * are met:
 * 1. Redistributions of source code must retain the above
copyright
 *    notice, this list of conditions and the following
disclaimer.
 * 2. Redistributions in binary form must reproduce the
above copyright
 *    notice, this list of conditions and the following
disclaimer in the
 *    documentation and/or other materials provided with the
distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _XEN_SHUTDOWN_XENBUS_H_
#define	_XEN_SHUTDOWN_XENBUS_H_

void shutdown_xenbus_setup(void);

#endif /* _XEN_SHUTDOWN_XENBUS_H_ */