release/src-rt-6.x.4708/linux/linux-2.6.36/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_mount.h"
  26 #include "xfs_error.h"
  27
  28 static char             message[1024];  /* keep it off the stack */
  29 static DEFINE_SPINLOCK(xfs_err_lock);
  30
  31 /* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */
  32 #define XFS_MAX_ERR_LEVEL       7
  33 #define XFS_ERR_MASK            ((1 << 3) - 1)
  34 static const char * const       err_level[XFS_MAX_ERR_LEVEL+1] =
  35                                         {KERN_EMERG, KERN_ALERT, KERN_CRIT,
  36                                          KERN_ERR, KERN_WARNING, KERN_NOTICE,
  37                                          KERN_INFO, KERN_DEBUG};
  38
  39 void
  40 cmn_err(register int level, char *fmt, ...)
  41 {
  42         char    *fp = fmt;
  43         int     len;
  44         ulong   flags;
  45         va_list ap;
  46
  47         level &= XFS_ERR_MASK;
  48         if (level > XFS_MAX_ERR_LEVEL)
  49                 level = XFS_MAX_ERR_LEVEL;
  50         spin_lock_irqsave(&xfs_err_lock,flags);
  51         va_start(ap, fmt);
  52         if (*fmt == '!') fp++;
  53         len = vsnprintf(message, sizeof(message), fp, ap);
  54         if (len >= sizeof(message))
  55                 len = sizeof(message) - 1;
  56         if (message[len-1] == '\n')
  57                 message[len-1] = 0;
  58         printk("%s%s\n", err_level[level], message);
  59         va_end(ap);
  60         spin_unlock_irqrestore(&xfs_err_lock,flags);
  61         BUG_ON(level == CE_PANIC);
  62 }
  63
  64 void
  65 xfs_fs_vcmn_err(
  66         int                     level,
  67         struct xfs_mount        *mp,
  68         char                    *fmt,
  69         va_list                 ap)
  70 {
  71         unsigned long           flags;
  72         int                     len = 0;
  73
  74         level &= XFS_ERR_MASK;
  75         if (level > XFS_MAX_ERR_LEVEL)
  76                 level = XFS_MAX_ERR_LEVEL;
  77
  78         spin_lock_irqsave(&xfs_err_lock,flags);
  79
  80         if (mp) {
  81                 len = sprintf(message, "Filesystem \"%s\": ", mp->m_fsname);
  82
  83                 /*
  84                  * Skip the printk if we can't print anything useful
  85                  * due to an over-long device name.
  86                  */
  87                 if (len >= sizeof(message))
  88                         goto out;
  89         }
  90
  91         len = vsnprintf(message + len, sizeof(message) - len, fmt, ap);
  92         if (len >= sizeof(message))
  93                 len = sizeof(message) - 1;
  94         if (message[len-1] == '\n')
  95                 message[len-1] = 0;
  96
  97         printk("%s%s\n", err_level[level], message);
  98  out:
  99         spin_unlock_irqrestore(&xfs_err_lock,flags);
 100
 101         BUG_ON(level == CE_PANIC);
 102 }
 103
 104 void
 105 assfail(char *expr, char *file, int line)
 106 {
 107         printk("Assertion failed: %s, file: %s, line: %d\n", expr, file, line);
 108         BUG();
 109 }
 110
 111 void
 112 xfs_hex_dump(void *p, int length)
 113 {
 114         print_hex_dump(KERN_ALERT, "", DUMP_PREFIX_ADDRESS, 16, 1, p, length, 1);
 115 }