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_trans.h"
  23 #include "xfs_sb.h"
  24 #include "xfs_ag.h"
  25 #include "xfs_mount.h"
  26 #include "xfs_bmap_btree.h"
  27 #include "xfs_dinode.h"
  28 #include "xfs_inode.h"
  29 #include "xfs_utils.h"
  30 #include "xfs_error.h"
  31
  32 #ifdef DEBUG
  33
  34 int     xfs_etrap[XFS_ERROR_NTRAP] = {
  35         0,
  36 };
  37
  38 int
  39 xfs_error_trap(int e)
  40 {
  41         int i;
  42
  43         if (!e)
  44                 return 0;
  45         for (i = 0; i < XFS_ERROR_NTRAP; i++) {
  46                 if (xfs_etrap[i] == 0)
  47                         break;
  48                 if (e != xfs_etrap[i])
  49                         continue;
  50                 xfs_notice(NULL, "%s: error %d", __func__, e);
  51                 BUG();
  52                 break;
  53         }
  54         return e;
  55 }
  56
  57 int     xfs_etest[XFS_NUM_INJECT_ERROR];
  58 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
  59 char *  xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
  60 int     xfs_error_test_active;
  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 (prandom_u32() % 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                         xfs_warn(NULL,
  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                         xfs_warn(mp, "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                         xfs_warn(mp, "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                         xfs_error_test_active++;
 112                         return 0;
 113                 }
 114         }
 115
 116         xfs_warn(mp, "error tag overflow, too many turned on");
 117
 118         return 1;
 119 }
 120
 121 int
 122 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
 123 {
 124         int64_t fsid;
 125         int cleared = 0;
 126         int i;
 127
 128         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 129
 130
 131         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 132                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 133                      xfs_etest[i] != 0) {
 134                         cleared = 1;
 135                         xfs_warn(mp, "Clearing XFS error tag #%d",
 136                                 xfs_etest[i]);
 137                         xfs_etest[i] = 0;
 138                         xfs_etest_fsid[i] = 0LL;
 139                         kmem_free(xfs_etest_fsname[i]);
 140                         xfs_etest_fsname[i] = NULL;
 141                         xfs_error_test_active--;
 142                 }
 143         }
 144
 145         if (loud || cleared)
 146                 xfs_warn(mp, "Cleared all XFS error tags for filesystem");
 147
 148         return 0;
 149 }
 150 #endif /* DEBUG */
 151
 152 void
 153 xfs_error_report(
 154         const char              *tag,
 155         int                     level,
 156         struct xfs_mount        *mp,
 157         const char              *filename,
 158         int                     linenum,
 159         inst_t                  *ra)
 160 {
 161         if (level <= xfs_error_level) {
 162                 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
 163                 "Internal error %s at line %d of file %s.  Caller 0x%p\n",
 164                             tag, linenum, filename, ra);
 165
 166                 xfs_stack_trace();
 167         }
 168 }
 169
 170 void
 171 xfs_corruption_error(
 172         const char              *tag,
 173         int                     level,
 174         struct xfs_mount        *mp,
 175         void                    *p,
 176         const char              *filename,
 177         int                     linenum,
 178         inst_t                  *ra)
 179 {
 180         if (level <= xfs_error_level)
 181                 xfs_hex_dump(p, 64);
 182         xfs_error_report(tag, level, mp, filename, linenum, ra);
 183         xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
 184 }