8d9a23e82c
When the SPL was originally written Linux tracepoints were still in their infancy. Therefore, an entire debugging subsystem was added to facilite tracing which served us well for many years. Now that Linux tracepoints have matured they provide all the functionality of the previous tracing subsystem. Rather than maintain parallel functionality it makes sense to fully adopt tracepoints. Therefore, this patch retires the legacy debugging infrastructure. See zfsonlinux/zfs@bc9f413 for the tracepoint changes. Signed-off-by: Ned Bass <bass6@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #408
118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://zfsonlinux.org/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************
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* Solaris Porting Layer (SPL) Error Implementation.
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\*****************************************************************************/
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#include <sys/sysmacros.h>
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#include <sys/cmn_err.h>
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#include <linux/ratelimit.h>
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/*
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* Limit the number of stack traces dumped to not more than 5 every
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* 60 seconds to prevent denial-of-service attacks from debug code.
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*/
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DEFINE_RATELIMIT_STATE(dumpstack_ratelimit_state, 60 * HZ, 5);
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void
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spl_dumpstack(void)
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{
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if (__ratelimit(&dumpstack_ratelimit_state)) {
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printk("Showing stack for process %d\n", current->pid);
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dump_stack();
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}
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}
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EXPORT_SYMBOL(spl_dumpstack);
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int
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spl_panic(const char *file, const char *func, int line, const char *fmt, ...) {
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const char *newfile;
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char msg[MAXMSGLEN];
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va_list ap;
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newfile = strrchr(file, '/');
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if (newfile != NULL)
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newfile = newfile + 1;
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else
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newfile = file;
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va_start(ap, fmt);
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(void) vsnprintf(msg, sizeof (msg), fmt, ap);
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va_end(ap);
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printk(KERN_EMERG "%s", msg);
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printk(KERN_EMERG "PANIC at %s:%d:%s()\n", newfile, line, func);
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spl_dumpstack();
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/* Halt the thread to facilitate further debugging */
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set_task_state(current, TASK_UNINTERRUPTIBLE);
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while (1)
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schedule();
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/* Unreachable */
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return (1);
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}
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EXPORT_SYMBOL(spl_panic);
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void
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vcmn_err(int ce, const char *fmt, va_list ap)
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{
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char msg[MAXMSGLEN];
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vsnprintf(msg, MAXMSGLEN - 1, fmt, ap);
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switch (ce) {
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case CE_IGNORE:
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break;
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case CE_CONT:
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printk("%s", msg);
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break;
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case CE_NOTE:
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printk(KERN_NOTICE "NOTICE: %s\n", msg);
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break;
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case CE_WARN:
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printk(KERN_WARNING "WARNING: %s\n", msg);
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break;
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case CE_PANIC:
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printk(KERN_EMERG "PANIC: %s\n", msg);
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spl_dumpstack();
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/* Halt the thread to facilitate further debugging */
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set_task_state(current, TASK_UNINTERRUPTIBLE);
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while (1)
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schedule();
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}
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} /* vcmn_err() */
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EXPORT_SYMBOL(vcmn_err);
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void
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cmn_err(int ce, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vcmn_err(ce, fmt, ap);
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va_end(ap);
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} /* cmn_err() */
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EXPORT_SYMBOL(cmn_err);
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