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