7d8ee480c4
MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D7334
157 lines
4.4 KiB
C
157 lines
4.4 KiB
C
/*-
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* Copyright (c) 2014,2016 Microsoft Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* A common driver for all hyper-V util services.
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/reboot.h>
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#include <sys/timetc.h>
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#include <sys/syscallsubr.h>
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#include <sys/systm.h>
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#include <dev/hyperv/include/hyperv.h>
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#include <dev/hyperv/include/vmbus.h>
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#include <dev/hyperv/utilities/hv_utilreg.h>
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#include "hv_util.h"
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#include "vmbus_if.h"
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static const struct hyperv_guid service_guid = { .hv_guid =
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{0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
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0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB} };
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/**
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* Shutdown
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*/
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static void
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hv_shutdown_cb(struct vmbus_channel *channel, void *context)
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{
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uint8_t* buf;
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uint8_t execute_shutdown = 0;
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hv_vmbus_icmsg_hdr* icmsghdrp;
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uint32_t recv_len;
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uint64_t request_id;
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int ret;
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hv_vmbus_shutdown_msg_data* shutdown_msg;
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hv_util_sc *softc;
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softc = (hv_util_sc*)context;
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buf = softc->receive_buffer;
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recv_len = PAGE_SIZE;
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ret = vmbus_chan_recv(channel, buf, &recv_len, &request_id);
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KASSERT(ret != ENOBUFS, ("hvshutdown recvbuf is not large enough"));
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/* XXX check recv_len to make sure that it contains enough data */
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if ((ret == 0) && recv_len > 0) {
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icmsghdrp = (struct hv_vmbus_icmsg_hdr *)
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&buf[sizeof(struct hv_vmbus_pipe_hdr)];
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if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
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hv_negotiate_version(icmsghdrp, NULL, buf);
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} else {
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shutdown_msg =
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(struct hv_vmbus_shutdown_msg_data *)
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&buf[sizeof(struct hv_vmbus_pipe_hdr) +
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sizeof(struct hv_vmbus_icmsg_hdr)];
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switch (shutdown_msg->flags) {
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case 0:
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case 1:
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icmsghdrp->status = HV_S_OK;
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execute_shutdown = 1;
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if(bootverbose)
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printf("Shutdown request received -"
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" graceful shutdown initiated\n");
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break;
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default:
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icmsghdrp->status = HV_E_FAIL;
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execute_shutdown = 0;
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printf("Shutdown request received -"
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" Invalid request\n");
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break;
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}
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}
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icmsghdrp->icflags = HV_ICMSGHDRFLAG_TRANSACTION |
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HV_ICMSGHDRFLAG_RESPONSE;
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vmbus_chan_send(channel, VMBUS_CHANPKT_TYPE_INBAND, 0,
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buf, recv_len, request_id);
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}
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if (execute_shutdown)
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shutdown_nice(RB_POWEROFF);
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}
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static int
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hv_shutdown_probe(device_t dev)
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{
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if (resource_disabled("hvshutdown", 0))
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return ENXIO;
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if (VMBUS_PROBE_GUID(device_get_parent(dev), dev, &service_guid) == 0) {
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device_set_desc(dev, "Hyper-V Shutdown Service");
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return BUS_PROBE_DEFAULT;
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}
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return ENXIO;
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}
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static int
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hv_shutdown_attach(device_t dev)
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{
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hv_util_sc *softc = (hv_util_sc*)device_get_softc(dev);
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softc->callback = hv_shutdown_cb;
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return hv_util_attach(dev);
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}
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static device_method_t shutdown_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, hv_shutdown_probe),
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DEVMETHOD(device_attach, hv_shutdown_attach),
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DEVMETHOD(device_detach, hv_util_detach),
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{ 0, 0 }
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};
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static driver_t shutdown_driver = { "hvshutdown", shutdown_methods, sizeof(hv_util_sc)};
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static devclass_t shutdown_devclass;
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DRIVER_MODULE(hv_shutdown, vmbus, shutdown_driver, shutdown_devclass, NULL, NULL);
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MODULE_VERSION(hv_shutdown, 1);
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MODULE_DEPEND(hv_shutdown, vmbus, 1, 1, 1);
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