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                 xfs_notice(NULL, "%s: error %d", __func__, 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 int     xfs_error_test_active;
  62
  63 int
  64 xfs_error_test(int error_tag, int *fsidp, char *expression,
  65                int line, char *file, unsigned long randfactor)
  66 {
  67         int i;
  68         int64_t fsid;
  69
  70         if (random32() % randfactor)
  71                 return 0;
  72
  73         memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
  74
  75         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  76                 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
  77                         xfs_warn(NULL,
  78         "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
  79                                 expression, file, line, xfs_etest_fsname[i]);
  80                         return 1;
  81                 }
  82         }
  83
  84         return 0;
  85 }
  86
  87 int
  88 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
  89 {
  90         int i;
  91         int len;
  92         int64_t fsid;
  93
  94         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
  95
  96         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  97                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
  98                         xfs_warn(mp, "error tag #%d on", error_tag);
  99                         return 0;
 100                 }
 101         }
 102
 103         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 104                 if (xfs_etest[i] == 0) {
 105                         xfs_warn(mp, "Turned on XFS error tag #%d",
 106                                 error_tag);
 107                         xfs_etest[i] = error_tag;
 108                         xfs_etest_fsid[i] = fsid;
 109                         len = strlen(mp->m_fsname);
 110                         xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 111                         strcpy(xfs_etest_fsname[i], mp->m_fsname);
 112                         xfs_error_test_active++;
 113                         return 0;
 114                 }
 115         }
 116
 117         xfs_warn(mp, "error tag overflow, too many turned on");
 118
 119         return 1;
 120 }
 121
 122 int
 123 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
 124 {
 125         int64_t fsid;
 126         int cleared = 0;
 127         int i;
 128
 129         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 130
 131
 132         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 133                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 134                      xfs_etest[i] != 0) {
 135                         cleared = 1;
 136                         xfs_warn(mp, "Clearing XFS error tag #%d",
 137                                 xfs_etest[i]);
 138                         xfs_etest[i] = 0;
 139                         xfs_etest_fsid[i] = 0LL;
 140                         kmem_free(xfs_etest_fsname[i]);
 141                         xfs_etest_fsname[i] = NULL;
 142                         xfs_error_test_active--;
 143                 }
 144         }
 145
 146         if (loud || cleared)
 147                 xfs_warn(mp, "Cleared all XFS error tags for filesystem");
 148
 149         return 0;
 150 }
 151 #endif /* DEBUG */
 152
 153 void
 154 xfs_error_report(
 155         const char              *tag,
 156         int                     level,
 157         struct xfs_mount        *mp,
 158         const char              *filename,
 159         int                     linenum,
 160         inst_t                  *ra)
 161 {
 162         if (level <= xfs_error_level) {
 163                 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
 164                 "Internal error %s at line %d of file %s.  Caller 0x%p\n",
 165                             tag, linenum, filename, ra);
 166
 167                 xfs_stack_trace();
 168         }
 169 }
 170
 171 void
 172 xfs_corruption_error(
 173         const char              *tag,
 174         int                     level,
 175         struct xfs_mount        *mp,
 176         void                    *p,
 177         const char              *filename,
 178         int                     linenum,
 179         inst_t                  *ra)
 180 {
 181         if (level <= xfs_error_level)
 182                 xfs_hex_dump(p, 16);
 183         xfs_error_report(tag, level, mp, filename, linenum, ra);
 184         xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
 185 }