fs/xfs/support/debug.c

   1 /*
   2  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include <xfs.h>
  19 #include "debug.h"
  20
  21 /* xfs_mount.h drags a lot of crap in, sorry.. */
  22 #include "xfs_sb.h"
  23 #include "xfs_inum.h"
  24 #include "xfs_ag.h"
  25 #include "xfs_dmapi.h"
  26 #include "xfs_mount.h"
  27 #include "xfs_error.h"
  28
  29 static char             message[1024];  /* keep it off the stack */
  30 static DEFINE_SPINLOCK(xfs_err_lock);
  31
  32 /* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */
  33 #define XFS_MAX_ERR_LEVEL       7
  34 #define XFS_ERR_MASK            ((1 << 3) - 1)
  35 static const char * const       err_level[XFS_MAX_ERR_LEVEL+1] =
  36                                         {KERN_EMERG, KERN_ALERT, KERN_CRIT,
  37                                          KERN_ERR, KERN_WARNING, KERN_NOTICE,
  38                                          KERN_INFO, KERN_DEBUG};
  39
  40 void
  41 cmn_err(register int level, char *fmt, ...)
  42 {
  43         char    *fp = fmt;
  44         int     len;
  45         ulong   flags;
  46         va_list ap;
  47
  48         level &= XFS_ERR_MASK;
  49         if (level > XFS_MAX_ERR_LEVEL)
  50                 level = XFS_MAX_ERR_LEVEL;
  51         spin_lock_irqsave(&xfs_err_lock,flags);
  52         va_start(ap, fmt);
  53         if (*fmt == '!') fp++;
  54         len = vsnprintf(message, sizeof(message), fp, ap);
  55         if (len >= sizeof(message))
  56                 len = sizeof(message) - 1;
  57         if (message[len-1] == '\n')
  58                 message[len-1] = 0;
  59         printk("%s%s\n", err_level[level], message);
  60         va_end(ap);
  61         spin_unlock_irqrestore(&xfs_err_lock,flags);
  62         BUG_ON(level == CE_PANIC);
  63 }
  64
  65 void
  66 xfs_fs_vcmn_err(
  67         int                     level,
  68         struct xfs_mount        *mp,
  69         char                    *fmt,
  70         va_list                 ap)
  71 {
  72         unsigned long           flags;
  73         int                     len = 0;
  74
  75         level &= XFS_ERR_MASK;
  76         if (level > XFS_MAX_ERR_LEVEL)
  77                 level = XFS_MAX_ERR_LEVEL;
  78
  79         spin_lock_irqsave(&xfs_err_lock,flags);
  80
  81         if (mp) {
  82                 len = sprintf(message, "Filesystem \"%s\": ", mp->m_fsname);
  83
  84                 /*
  85                  * Skip the printk if we can't print anything useful
  86                  * due to an over-long device name.
  87                  */
  88                 if (len >= sizeof(message))
  89                         goto out;
  90         }
  91
  92         len = vsnprintf(message + len, sizeof(message) - len, fmt, ap);
  93         if (len >= sizeof(message))
  94                 len = sizeof(message) - 1;
  95         if (message[len-1] == '\n')
  96                 message[len-1] = 0;
  97
  98         printk("%s%s\n", err_level[level], message);
  99  out:
 100         spin_unlock_irqrestore(&xfs_err_lock,flags);
 101
 102         BUG_ON(level == CE_PANIC);
 103 }
 104
 105 void
 106 assfail(char *expr, char *file, int line)
 107 {
 108         printk("Assertion failed: %s, file: %s, line: %d\n", expr, file, line);
 109         BUG();
 110 }
 111
 112 void
 113 xfs_hex_dump(void *p, int length)
 114 {
 115         print_hex_dump(KERN_ALERT, "", DUMP_PREFIX_ADDRESS, 16, 1, p, length, 1);
 116 }