fs/xfs/xfs_error.c

   1 /*
   2  * Copyright (c) 2000-2001,2005 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 "xfs_fs.h"
  20 #include "xfs_types.h"
  21 #include "xfs_log.h"
  22 #include "xfs_inum.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_mount.h"
  27 #include "xfs_bmap_btree.h"
  28 #include "xfs_dinode.h"
  29 #include "xfs_inode.h"
  30 #include "xfs_utils.h"
  31 #include "xfs_error.h"
  32
  33 #ifdef DEBUG
  34
  35 int     xfs_etrap[XFS_ERROR_NTRAP] = {
  36         0,
  37 };
  38
  39 int
  40 xfs_error_trap(int e)
  41 {
  42         int i;
  43
  44         if (!e)
  45                 return 0;
  46         for (i = 0; i < XFS_ERROR_NTRAP; i++) {
  47                 if (xfs_etrap[i] == 0)
  48                         break;
  49                 if (e != xfs_etrap[i])
  50                         continue;
  51                 cmn_err(CE_NOTE, "xfs_error_trap: error %d", e);
  52                 BUG();
  53                 break;
  54         }
  55         return e;
  56 }
  57
  58 int     xfs_etest[XFS_NUM_INJECT_ERROR];
  59 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
  60 char *  xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
  61
  62 int
  63 xfs_error_test(int error_tag, int *fsidp, char *expression,
  64                int line, char *file, unsigned long randfactor)
  65 {
  66         int i;
  67         int64_t fsid;
  68
  69         if (random32() % randfactor)
  70                 return 0;
  71
  72         memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
  73
  74         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  75                 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
  76                         cmn_err(CE_WARN,
  77         "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
  78                                 expression, file, line, xfs_etest_fsname[i]);
  79                         return 1;
  80                 }
  81         }
  82
  83         return 0;
  84 }
  85
  86 int
  87 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
  88 {
  89         int i;
  90         int len;
  91         int64_t fsid;
  92
  93         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
  94
  95         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  96                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
  97                         cmn_err(CE_WARN, "XFS error tag #%d on", error_tag);
  98                         return 0;
  99                 }
 100         }
 101
 102         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 103                 if (xfs_etest[i] == 0) {
 104                         cmn_err(CE_WARN, "Turned on XFS error tag #%d",
 105                                 error_tag);
 106                         xfs_etest[i] = error_tag;
 107                         xfs_etest_fsid[i] = fsid;
 108                         len = strlen(mp->m_fsname);
 109                         xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 110                         strcpy(xfs_etest_fsname[i], mp->m_fsname);
 111                         return 0;
 112                 }
 113         }
 114
 115         cmn_err(CE_WARN, "error tag overflow, too many turned on");
 116
 117         return 1;
 118 }
 119
 120 int
 121 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
 122 {
 123         int64_t fsid;
 124         int cleared = 0;
 125         int i;
 126
 127         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 128
 129
 130         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 131                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 132                      xfs_etest[i] != 0) {
 133                         cleared = 1;
 134                         cmn_err(CE_WARN, "Clearing XFS error tag #%d",
 135                                 xfs_etest[i]);
 136                         xfs_etest[i] = 0;
 137                         xfs_etest_fsid[i] = 0LL;
 138                         kmem_free(xfs_etest_fsname[i]);
 139                         xfs_etest_fsname[i] = NULL;
 140                 }
 141         }
 142
 143         if (loud || cleared)
 144                 cmn_err(CE_WARN,
 145                         "Cleared all XFS error tags for filesystem \"%s\"",
 146                         mp->m_fsname);
 147
 148         return 0;
 149 }
 150 #endif /* DEBUG */
 151
 152
 153 void
 154 xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...)
 155 {
 156         va_list ap;
 157
 158         va_start(ap, fmt);
 159         xfs_fs_vcmn_err(level, mp, fmt, ap);
 160         va_end(ap);
 161 }
 162
 163 void
 164 xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...)
 165 {
 166         va_list ap;
 167
 168 #ifdef DEBUG
 169         xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES);
 170 #endif
 171
 172         if (xfs_panic_mask && (xfs_panic_mask & panic_tag)
 173             && (level & CE_ALERT)) {
 174                 level &= ~CE_ALERT;
 175                 level |= CE_PANIC;
 176                 cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG.");
 177         }
 178         va_start(ap, fmt);
 179         xfs_fs_vcmn_err(level, mp, fmt, ap);
 180         va_end(ap);
 181 }
 182
 183 void
 184 xfs_error_report(
 185         const char              *tag,
 186         int                     level,
 187         struct xfs_mount        *mp,
 188         const char              *filename,
 189         int                     linenum,
 190         inst_t                  *ra)
 191 {
 192         if (level <= xfs_error_level) {
 193                 xfs_cmn_err(XFS_PTAG_ERROR_REPORT,
 194                             CE_ALERT, mp,
 195                 "XFS internal error %s at line %d of file %s.  Caller 0x%p\n",
 196                             tag, linenum, filename, ra);
 197
 198                 xfs_stack_trace();
 199         }
 200 }
 201
 202 void
 203 xfs_corruption_error(
 204         const char              *tag,
 205         int                     level,
 206         struct xfs_mount        *mp,
 207         void                    *p,
 208         const char              *filename,
 209         int                     linenum,
 210         inst_t                  *ra)
 211 {
 212         if (level <= xfs_error_level)
 213                 xfs_hex_dump(p, 16);
 214         xfs_error_report(tag, level, mp, filename, linenum, ra);
 215 }