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 module_param(spl_panic_halt, uint, 0644); 37 MODULE_PARM_DESC(spl_panic_halt, "Cause kernel panic on assertion failures"); 38 39 void 40 spl_dumpstack(void) 41 { 42 printk("Showing stack for process %d\n", current->pid); 43 dump_stack(); 44 } 45 EXPORT_SYMBOL(spl_dumpstack); 46 47 void 48 spl_panic(const char *file, const char *func, int line, const char *fmt, ...) 49 { 50 const char *newfile; 51 char msg[MAXMSGLEN]; 52 va_list ap; 53 54 newfile = strrchr(file, '/'); 55 if (newfile != NULL) 56 newfile = newfile + 1; 57 else 58 newfile = file; 59 60 va_start(ap, fmt); 61 (void) vsnprintf(msg, sizeof (msg), fmt, ap); 62 va_end(ap); 63 64 printk(KERN_EMERG "%s", msg); 65 printk(KERN_EMERG "PANIC at %s:%d:%s()\n", newfile, line, func); 66 if (spl_panic_halt) 67 panic("%s", msg); 68 69 spl_dumpstack(); 70 71 /* Halt the thread to facilitate further debugging */ 72 set_current_state(TASK_UNINTERRUPTIBLE); 73 while (1) 74 schedule(); 75 76 /* Unreachable */ 77 } 78 EXPORT_SYMBOL(spl_panic); 79 80 void 81 vcmn_err(int ce, const char *fmt, va_list ap) 82 { 83 char msg[MAXMSGLEN]; 84 85 vsnprintf(msg, MAXMSGLEN, fmt, ap); 86 87 switch (ce) { 88 case CE_IGNORE: 89 break; 90 case CE_CONT: 91 printk("%s", msg); 92 break; 93 case CE_NOTE: 94 printk(KERN_NOTICE "NOTICE: %s\n", msg); 95 break; 96 case CE_WARN: 97 printk(KERN_WARNING "WARNING: %s\n", msg); 98 break; 99 case CE_PANIC: 100 printk(KERN_EMERG "PANIC: %s\n", msg); 101 if (spl_panic_halt) 102 panic("%s", msg); 103 104 spl_dumpstack(); 105 106 /* Halt the thread to facilitate further debugging */ 107 set_current_state(TASK_UNINTERRUPTIBLE); 108 while (1) 109 schedule(); 110 } 111 } /* vcmn_err() */ 112 EXPORT_SYMBOL(vcmn_err); 113 114 void 115 cmn_err(int ce, const char *fmt, ...) 116 { 117 va_list ap; 118 119 va_start(ap, fmt); 120 vcmn_err(ce, fmt, ap); 121 va_end(ap); 122 } /* cmn_err() */ 123 EXPORT_SYMBOL(cmn_err); 124