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/*-
* Copyright (c) 2014,2016 Microsoft Corp.
* 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 unmodified, 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 ``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.
*
* $FreeBSD$
*/
/*
* A common driver for all hyper-V util services.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/reboot.h>
#include <sys/timetc.h>
#include <sys/syscallsubr.h>
#include <sys/systm.h>
#include <dev/hyperv/include/hyperv.h>
#include <dev/hyperv/include/vmbus.h>
#include <dev/hyperv/utilities/hv_utilreg.h>
#include "hv_util.h"
#include "vmbus_if.h"
static const struct vmbus_ic_desc vmbus_shutdown_descs[] = {
{
.ic_guid = { .hv_guid = {
0x31, 0x60, 0x0b, 0x0e, 0x13, 0x52, 0x34, 0x49,
0x81, 0x8b, 0x38, 0xd9, 0x0c, 0xed, 0x39, 0xdb } },
.ic_desc = "Hyper-V Shutdown"
},
VMBUS_IC_DESC_END
};
/**
* Shutdown
*/
static void
hv_shutdown_cb(struct vmbus_channel *channel, void *context)
{
uint8_t* buf;
uint8_t execute_shutdown = 0;
hv_vmbus_icmsg_hdr* icmsghdrp;
uint32_t recv_len;
uint64_t request_id;
int ret;
hv_vmbus_shutdown_msg_data* shutdown_msg;
hv_util_sc *softc;
softc = (hv_util_sc*)context;
buf = softc->receive_buffer;
recv_len = softc->ic_buflen;
ret = vmbus_chan_recv(channel, buf, &recv_len, &request_id);
KASSERT(ret != ENOBUFS, ("hvshutdown recvbuf is not large enough"));
/* XXX check recv_len to make sure that it contains enough data */
if ((ret == 0) && recv_len > 0) {
icmsghdrp = (struct hv_vmbus_icmsg_hdr *)
&buf[sizeof(struct hv_vmbus_pipe_hdr)];
if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
int error;
error = vmbus_ic_negomsg(softc, buf, &recv_len);
if (error)
return;
} else {
shutdown_msg =
(struct hv_vmbus_shutdown_msg_data *)
&buf[sizeof(struct hv_vmbus_pipe_hdr) +
sizeof(struct hv_vmbus_icmsg_hdr)];
switch (shutdown_msg->flags) {
case 0:
case 1:
icmsghdrp->status = HV_S_OK;
execute_shutdown = 1;
if(bootverbose)
printf("Shutdown request received -"
" graceful shutdown initiated\n");
break;
default:
icmsghdrp->status = HV_E_FAIL;
execute_shutdown = 0;
printf("Shutdown request received -"
" Invalid request\n");
break;
}
}
icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
HV_ICMSGHDRFLAG_RESPONSE;
vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0,
buf, recv_len, request_id);
}
if (execute_shutdown)
shutdown_nice(RB_POWEROFF);
}
static int
hv_shutdown_probe(device_t dev)
{
return (vmbus_ic_probe(dev, vmbus_shutdown_descs));
}
static int
hv_shutdown_attach(device_t dev)
{
return hv_util_attach(dev, hv_shutdown_cb);
}
static device_method_t shutdown_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, hv_shutdown_probe),
DEVMETHOD(device_attach, hv_shutdown_attach),
DEVMETHOD(device_detach, hv_util_detach),
{ 0, 0 }
};
static driver_t shutdown_driver = { "hvshutdown", shutdown_methods, sizeof(hv_util_sc)};
static devclass_t shutdown_devclass;
DRIVER_MODULE(hv_shutdown, vmbus, shutdown_driver, shutdown_devclass, NULL, NULL);
MODULE_VERSION(hv_shutdown, 1);
MODULE_DEPEND(hv_shutdown, vmbus, 1, 1, 1);
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