| 1 | /* |
| 2 | * Copyright (c) 2007 The DragonFly Project. All rights reserved. |
| 3 | * |
| 4 | * This code is derived from software contributed to The DragonFly Project |
| 5 | * by Matthew Dillon <dillon@backplane.com> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in |
| 15 | * the documentation and/or other materials provided with the |
| 16 | * distribution. |
| 17 | * 3. Neither the name of The DragonFly Project nor the names of its |
| 18 | * contributors may be used to endorse or promote products derived |
| 19 | * from this software without specific, prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 22 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 23 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 24 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 25 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 26 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 27 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 28 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 29 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 31 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * $DragonFly: src/sys/platform/vkernel/platform/shutdown.c,v 1.1 2007/07/01 02:51:45 dillon Exp $ |
| 35 | */ |
| 36 | /* |
| 37 | * Install a signal handler for SIGTERM which shuts down the virtual kernel |
| 38 | */ |
| 39 | |
| 40 | #include "opt_ddb.h" |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/reboot.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/kthread.h> |
| 46 | #include <sys/reboot.h> |
| 47 | #include <sys/interrupt.h> |
| 48 | #include <sys/bus.h> |
| 49 | #include <ddb/ddb.h> |
| 50 | |
| 51 | #include <sys/thread2.h> |
| 52 | |
| 53 | #include <machine/trap.h> |
| 54 | #include <machine/md_var.h> |
| 55 | #include <machine/segments.h> |
| 56 | #include <machine/cpu.h> |
| 57 | |
| 58 | #include <err.h> |
| 59 | #include <signal.h> |
| 60 | #include <unistd.h> |
| 61 | |
| 62 | static void shutdownsig(int signo); |
| 63 | static void shutdown_intr(void *arg __unused, void *frame __unused); |
| 64 | |
| 65 | static |
| 66 | void |
| 67 | initshutdown(void *arg __unused) |
| 68 | { |
| 69 | struct sigaction sa; |
| 70 | |
| 71 | bzero(&sa, sizeof(sa)); |
| 72 | sigemptyset(&sa.sa_mask); |
| 73 | sa.sa_flags |= SA_NODEFER; |
| 74 | sa.sa_handler = shutdownsig; |
| 75 | sigaction(SIGTERM, &sa, NULL); |
| 76 | |
| 77 | register_int(2, shutdown_intr, NULL, "shutdown", NULL, INTR_MPSAFE, 0); |
| 78 | } |
| 79 | |
| 80 | static |
| 81 | void |
| 82 | shutdownsig(int signo) |
| 83 | { |
| 84 | signalintr(2); |
| 85 | } |
| 86 | |
| 87 | SYSINIT(initshutdown, SI_BOOT2_PROC0, SI_ORDER_ANY, |
| 88 | initshutdown, NULL); |
| 89 | |
| 90 | /* |
| 91 | * DragonFly-safe interrupt thread. We are the only handler on interrupt |
| 92 | * #2 so we can just steal the thread's context forever. |
| 93 | */ |
| 94 | static |
| 95 | void |
| 96 | shutdown_intr(void *arg __unused, void *frame __unused) |
| 97 | { |
| 98 | kprintf("Caught SIGTERM from host system. Shutting down...\n"); |
| 99 | if (initproc != NULL) { |
| 100 | ksignal(initproc, SIGUSR2); |
| 101 | } else { |
| 102 | reboot(RB_POWEROFF); |
| 103 | } |
| 104 | } |