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