kernel/fs/xfs/xfs_message.c

   1 /*
   2  * Copyright (c) 2011 Red Hat, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write the Free Software Foundation,
  15  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  16  */
  17
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_error.h"
  21 #include "xfs_format.h"
  22 #include "xfs_log_format.h"
  23 #include "xfs_trans_resv.h"
  24 #include "xfs_mount.h"
  25
  26 /*
  27  * XFS logging functions
  28  */
  29 static void
  30 __xfs_printk(
  31         const char              *level,
  32         const struct xfs_mount  *mp,
  33         struct va_format        *vaf)
  34 {
  35         if (mp && mp->m_fsname) {
  36                 printk("%sXFS (%s): %pV\n", level, mp->m_fsname, vaf);
  37                 return;
  38         }
  39         printk("%sXFS: %pV\n", level, vaf);
  40 }
  41
  42 #define define_xfs_printk_level(func, kern_level)               \
  43 void func(const struct xfs_mount *mp, const char *fmt, ...)     \
  44 {                                                               \
  45         struct va_format        vaf;                            \
  46         va_list                 args;                           \
  47         int                     level;                          \
  48                                                                 \
  49         va_start(args, fmt);                                    \
  50                                                                 \
  51         vaf.fmt = fmt;                                          \
  52         vaf.va = &args;                                         \
  53                                                                 \
  54         __xfs_printk(kern_level, mp, &vaf);                     \
  55         va_end(args);                                           \
  56                                                                 \
  57         if (!kstrtoint(kern_level, 0, &level) &&                \
  58             level <= LOGLEVEL_ERR &&                            \
  59             xfs_error_level >= XFS_ERRLEVEL_HIGH)               \
  60                 xfs_stack_trace();                              \
  61 }                                                               \
  62
  63 define_xfs_printk_level(xfs_emerg, KERN_EMERG);
  64 define_xfs_printk_level(xfs_alert, KERN_ALERT);
  65 define_xfs_printk_level(xfs_crit, KERN_CRIT);
  66 define_xfs_printk_level(xfs_err, KERN_ERR);
  67 define_xfs_printk_level(xfs_warn, KERN_WARNING);
  68 define_xfs_printk_level(xfs_notice, KERN_NOTICE);
  69 define_xfs_printk_level(xfs_info, KERN_INFO);
  70 #ifdef DEBUG
  71 define_xfs_printk_level(xfs_debug, KERN_DEBUG);
  72 #endif
  73
  74 void
  75 xfs_alert_tag(
  76         const struct xfs_mount  *mp,
  77         int                     panic_tag,
  78         const char              *fmt, ...)
  79 {
  80         struct va_format        vaf;
  81         va_list                 args;
  82         int                     do_panic = 0;
  83
  84         if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) {
  85                 xfs_alert(mp, "Transforming an alert into a BUG.");
  86                 do_panic = 1;
  87         }
  88
  89         va_start(args, fmt);
  90
  91         vaf.fmt = fmt;
  92         vaf.va = &args;
  93
  94         __xfs_printk(KERN_ALERT, mp, &vaf);
  95         va_end(args);
  96
  97         BUG_ON(do_panic);
  98 }
  99
 100 void
 101 asswarn(char *expr, char *file, int line)
 102 {
 103         xfs_warn(NULL, "Assertion failed: %s, file: %s, line: %d",
 104                 expr, file, line);
 105         WARN_ON(1);
 106 }
 107
 108 void
 109 assfail(char *expr, char *file, int line)
 110 {
 111         xfs_emerg(NULL, "Assertion failed: %s, file: %s, line: %d",
 112                 expr, file, line);
 113         BUG();
 114 }
 115
 116 void
 117 xfs_hex_dump(void *p, int length)
 118 {
 119         print_hex_dump(KERN_ALERT, "", DUMP_PREFIX_ADDRESS, 16, 1, p, length, 1);
 120 }