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>.
8 * This file is part of the SPL, Solaris Porting Layer.
9 * For details, see <http://zfsonlinux.org/>.
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.
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
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 \*****************************************************************************/
27 #include <sys/sysmacros.h>
28 #include <sys/cmn_err.h>
29 #include <linux/ratelimit.h>
32 * It is often useful to actually have the panic crash the node so you
33 * can then get notified of the event, get the crashdump for later
34 * analysis and other such goodies.
35 * But we would still default to the current default of not to do that.
37 unsigned int spl_panic_halt
;
38 module_param(spl_panic_halt
, uint
, 0644);
39 MODULE_PARM_DESC(spl_panic_halt
,
40 "Cause kernel panic on assertion failures");
43 * Limit the number of stack traces dumped to not more than 5 every
44 * 60 seconds to prevent denial-of-service attacks from debug code.
46 DEFINE_RATELIMIT_STATE(dumpstack_ratelimit_state
, 60 * HZ
, 5);
51 if (__ratelimit(&dumpstack_ratelimit_state
)) {
52 printk("Showing stack for process %d\n", current
->pid
);
56 EXPORT_SYMBOL(spl_dumpstack
);
59 spl_panic(const char *file
, const char *func
, int line
, const char *fmt
, ...) {
64 newfile
= strrchr(file
, '/');
66 newfile
= newfile
+ 1;
71 (void) vsnprintf(msg
, sizeof (msg
), fmt
, ap
);
74 printk(KERN_EMERG
"%s", msg
);
75 printk(KERN_EMERG
"PANIC at %s:%d:%s()\n", newfile
, line
, func
);
81 /* Halt the thread to facilitate further debugging */
82 set_current_state(TASK_UNINTERRUPTIBLE
);
89 EXPORT_SYMBOL(spl_panic
);
92 vcmn_err(int ce
, const char *fmt
, va_list ap
)
96 vsnprintf(msg
, MAXMSGLEN
- 1, fmt
, ap
);
105 printk(KERN_NOTICE
"NOTICE: %s\n", msg
);
108 printk(KERN_WARNING
"WARNING: %s\n", msg
);
111 printk(KERN_EMERG
"PANIC: %s\n", msg
);
114 /* Halt the thread to facilitate further debugging */
115 set_current_state(TASK_UNINTERRUPTIBLE
);
120 EXPORT_SYMBOL(vcmn_err
);
123 cmn_err(int ce
, const char *fmt
, ...)
128 vcmn_err(ce
, fmt
, ap
);
131 EXPORT_SYMBOL(cmn_err
);