spl-err.c

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

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/module/os/linux/spl/spl-err.c

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/module/os/linux/spl/spl-err.c