1 /* 2 * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. 3 * Copyright (C) 2007 The Regents of the University of California. 4 * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). 5 * Written by Brian Behlendorf <behlendorf1@llnl.gov>. 6 * UCRL-CODE-235197 7 * 8 * This file is part of the SPL, Solaris Porting Layer. 9 * 10 * The SPL is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 * The SPL is distributed in the hope that it will be useful, but WITHOUT 16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 18 * for more details. 19 * 20 * You should have received a copy of the GNU General Public License along 21 * with the SPL. If not, see <http://www.gnu.org/licenses/>. 22 * 23 * Solaris Porting Layer (SPL) Error Implementation. 24 */ 25 26 #include <sys/sysmacros.h> 27 #include <sys/cmn_err.h> 28 29 /* 30 * It is often useful to actually have the panic crash the node so you 31 * can then get notified of the event, get the crashdump for later 32 * analysis and other such goodies. 33 * But we would still default to the current default of not to do that. 34 */ 35 static unsigned int spl_panic_halt; 36 /* CSTYLED */ 37 module_param(spl_panic_halt, uint, 0644); 38 MODULE_PARM_DESC(spl_panic_halt, "Cause kernel panic on assertion failures"); 39 40 void 41 spl_dumpstack(void) 42 { 43 printk("Showing stack for process %d\n", current->pid); 44 dump_stack(); 45 } 46 EXPORT_SYMBOL(spl_dumpstack); 47 48 void 49 spl_panic(const char *file, const char *func, int line, const char *fmt, ...) 50 { 51 const char *newfile; 52 char msg[MAXMSGLEN]; 53 va_list ap; 54 55 newfile = strrchr(file, '/'); 56 if (newfile != NULL) 57 newfile = newfile + 1; 58 else 59 newfile = file; 60 61 va_start(ap, fmt); 62 (void) vsnprintf(msg, sizeof (msg), fmt, ap); 63 va_end(ap); 64 65 printk(KERN_EMERG "%s", msg); 66 printk(KERN_EMERG "PANIC at %s:%d:%s()\n", newfile, line, func); 67 if (spl_panic_halt) 68 panic("%s", msg); 69 70 spl_dumpstack(); 71 72 /* Halt the thread to facilitate further debugging */ 73 set_current_state(TASK_UNINTERRUPTIBLE); 74 while (1) 75 schedule(); 76 77 /* Unreachable */ 78 } 79 EXPORT_SYMBOL(spl_panic); 80 81 void 82 vcmn_err(int ce, const char *fmt, va_list ap) 83 { 84 char msg[MAXMSGLEN]; 85 86 vsnprintf(msg, MAXMSGLEN, fmt, ap); 87 88 switch (ce) { 89 case CE_IGNORE: 90 break; 91 case CE_CONT: 92 printk("%s", msg); 93 break; 94 case CE_NOTE: 95 printk(KERN_NOTICE "NOTICE: %s\n", msg); 96 break; 97 case CE_WARN: 98 printk(KERN_WARNING "WARNING: %s\n", msg); 99 break; 100 case CE_PANIC: 101 printk(KERN_EMERG "PANIC: %s\n", msg); 102 if (spl_panic_halt) 103 panic("%s", msg); 104 105 spl_dumpstack(); 106 107 /* Halt the thread to facilitate further debugging */ 108 set_current_state(TASK_UNINTERRUPTIBLE); 109 while (1) 110 schedule(); 111 } 112 } /* vcmn_err() */ 113 EXPORT_SYMBOL(vcmn_err); 114 115 void 116 cmn_err(int ce, const char *fmt, ...) 117 { 118 va_list ap; 119 120 va_start(ap, fmt); 121 vcmn_err(ce, fmt, ap); 122 va_end(ap); 123 } /* cmn_err() */ 124 EXPORT_SYMBOL(cmn_err); 125