1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2012 by Delphix. All rights reserved. 24 * Copyright 2013 Nexenta Systems, Inc. All rights reserved. 25 */ 26 27 #include <sys/param.h> 28 #include <sys/types.h> 29 #include <sys/varargs.h> 30 #include <sys/systm.h> 31 #include <sys/cmn_err.h> 32 #include <sys/log.h> 33 34 #include <fakekernel.h> 35 36 void abort(void) __NORETURN; 37 38 char *volatile panicstr; 39 va_list panicargs; 40 char panicbuf[512]; 41 42 volatile int aok; 43 44 static const int 45 ce_flags[CE_IGNORE] = { SL_NOTE, SL_NOTE, SL_WARN, SL_FATAL }; 46 static const char 47 ce_prefix[CE_IGNORE][10] = { "", "NOTICE: ", "WARNING: ", "" }; 48 static const char 49 ce_suffix[CE_IGNORE][2] = { "", "\n", "\n", "" }; 50 51 52 /* 53 * This function is just a stub, exported NODIRECT so that 54 * comsumers like fksmbd can provide their own. 55 * (One that actually prints the messages.) 56 * 57 * It's used by fakekernel_cprintf() below. 58 * The flags are SL_... from strlog.h 59 */ 60 /* ARGSUSED */ 61 void 62 fakekernel_putlog(char *msg, size_t len, int flags) 63 { 64 } 65 66 /* 67 * fakekernel_cprintf() corresponds to os/printf.c:cprintf() 68 * This formats the message and calls fakekernel_putlog(). 69 * It's exported NODIRECT to allow replacment. 70 * The flags are SL_... from strlog.h 71 */ 72 void 73 fakekernel_cprintf(const char *fmt, va_list adx, int flags, 74 const char *prefix, const char *suffix) 75 { 76 size_t bufsize = LOG_MSGSIZE; 77 char buf[LOG_MSGSIZE]; 78 char *bufp = buf; 79 char *msgp, *bufend; 80 size_t len; 81 82 if (strchr("^!?", fmt[0]) != NULL) { 83 if (fmt[0] == '^') 84 flags |= SL_CONSONLY; 85 else if (fmt[0] == '!') 86 flags |= SL_LOGONLY; 87 fmt++; 88 } 89 90 bufend = bufp + bufsize; 91 msgp = bufp; 92 msgp += snprintf(msgp, bufend - msgp, "[fake_kernel] "); 93 msgp += snprintf(msgp, bufend - msgp, prefix); 94 msgp += vsnprintf(msgp, bufend - msgp, fmt, adx); 95 msgp += snprintf(msgp, bufend - msgp, suffix); 96 len = msgp - bufp; 97 98 fakekernel_putlog(bufp, len, flags); 99 } 100 101 /* 102 * "User-level crash dump", if you will. 103 */ 104 void 105 vpanic(const char *fmt, va_list adx) 106 { 107 va_list tmpargs; 108 109 panicstr = (char *)fmt; 110 va_copy(panicargs, adx); 111 112 va_copy(tmpargs, adx); 113 fakekernel_cprintf(fmt, tmpargs, SL_FATAL, "fatal: ", "\n"); 114 115 /* Call libc`assfail() so that mdb ::status works */ 116 (void) vsnprintf(panicbuf, sizeof (panicbuf), fmt, adx); 117 assfail(panicbuf, "(panic)", 0); 118 119 abort(); /* avoid "noreturn" warnings */ 120 } 121 122 void 123 panic(const char *fmt, ...) 124 { 125 va_list adx; 126 127 va_start(adx, fmt); 128 vpanic(fmt, adx); 129 va_end(adx); 130 } 131 132 void 133 vcmn_err(int ce, const char *fmt, va_list adx) 134 { 135 136 if (ce == CE_PANIC) 137 vpanic(fmt, adx); 138 if (ce >= CE_IGNORE) 139 return; 140 141 fakekernel_cprintf(fmt, adx, ce_flags[ce] | SL_CONSOLE, 142 ce_prefix[ce], ce_suffix[ce]); 143 } 144 145 /*PRINTFLIKE2*/ 146 void 147 cmn_err(int ce, const char *fmt, ...) 148 { 149 va_list adx; 150 151 va_start(adx, fmt); 152 vcmn_err(ce, fmt, adx); 153 va_end(adx); 154 } 155