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_dir2.h"
  27 #include "xfs_dmapi.h"
  28 #include "xfs_mount.h"
  29 #include "xfs_bmap_btree.h"
  30 #include "xfs_dir2_sf.h"
  31 #include "xfs_attr_sf.h"
  32 #include "xfs_dinode.h"
  33 #include "xfs_inode.h"
  34 #include "xfs_utils.h"
  35 #include "xfs_error.h"
  36
  37 #ifdef DEBUG
  38
  39 int     xfs_etrap[XFS_ERROR_NTRAP] = {
  40         0,
  41 };
  42
  43 int
  44 xfs_error_trap(int e)
  45 {
  46         int i;
  47
  48         if (!e)
  49                 return 0;
  50         for (i = 0; i < XFS_ERROR_NTRAP; i++) {
  51                 if (xfs_etrap[i] == 0)
  52                         break;
  53                 if (e != xfs_etrap[i])
  54                         continue;
  55                 cmn_err(CE_NOTE, "xfs_error_trap: error %d", e);
  56                 BUG();
  57                 break;
  58         }
  59         return e;
  60 }
  61
  62 int     xfs_etest[XFS_NUM_INJECT_ERROR];
  63 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
  64 char *  xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
  65
  66 int
  67 xfs_error_test(int error_tag, int *fsidp, char *expression,
  68                int line, char *file, unsigned long randfactor)
  69 {
  70         int i;
  71         int64_t fsid;
  72
  73         if (random32() % randfactor)
  74                 return 0;
  75
  76         memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
  77
  78         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  79                 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
  80                         cmn_err(CE_WARN,
  81         "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
  82                                 expression, file, line, xfs_etest_fsname[i]);
  83                         return 1;
  84                 }
  85         }
  86
  87         return 0;
  88 }
  89
  90 int
  91 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
  92 {
  93         int i;
  94         int len;
  95         int64_t fsid;
  96
  97         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
  98
  99         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 100                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
 101                         cmn_err(CE_WARN, "XFS error tag #%d on", error_tag);
 102                         return 0;
 103                 }
 104         }
 105
 106         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 107                 if (xfs_etest[i] == 0) {
 108                         cmn_err(CE_WARN, "Turned on XFS error tag #%d",
 109                                 error_tag);
 110                         xfs_etest[i] = error_tag;
 111                         xfs_etest_fsid[i] = fsid;
 112                         len = strlen(mp->m_fsname);
 113                         xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 114                         strcpy(xfs_etest_fsname[i], mp->m_fsname);
 115                         return 0;
 116                 }
 117         }
 118
 119         cmn_err(CE_WARN, "error tag overflow, too many turned on");
 120
 121         return 1;
 122 }
 123
 124 int
 125 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
 126 {
 127         int64_t fsid;
 128         int cleared = 0;
 129         int i;
 130
 131         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 132
 133
 134         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 135                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 136                      xfs_etest[i] != 0) {
 137                         cleared = 1;
 138                         cmn_err(CE_WARN, "Clearing XFS error tag #%d",
 139                                 xfs_etest[i]);
 140                         xfs_etest[i] = 0;
 141                         xfs_etest_fsid[i] = 0LL;
 142                         kmem_free(xfs_etest_fsname[i]);
 143                         xfs_etest_fsname[i] = NULL;
 144                 }
 145         }
 146
 147         if (loud || cleared)
 148                 cmn_err(CE_WARN,
 149                         "Cleared all XFS error tags for filesystem \"%s\"",
 150                         mp->m_fsname);
 151
 152         return 0;
 153 }
 154 #endif /* DEBUG */
 155
 156 static void
 157 xfs_fs_vcmn_err(int level, xfs_mount_t *mp, char *fmt, va_list ap)
 158 {
 159         if (mp != NULL) {
 160                 char    *newfmt;
 161                 int     len = 16 + mp->m_fsname_len + strlen(fmt);
 162
 163                 newfmt = kmem_alloc(len, KM_SLEEP);
 164                 sprintf(newfmt, "Filesystem \"%s\": %s", mp->m_fsname, fmt);
 165                 icmn_err(level, newfmt, ap);
 166                 kmem_free(newfmt);
 167         } else {
 168                 icmn_err(level, fmt, ap);
 169         }
 170 }
 171
 172 void
 173 xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...)
 174 {
 175         va_list ap;
 176
 177         va_start(ap, fmt);
 178         xfs_fs_vcmn_err(level, mp, fmt, ap);
 179         va_end(ap);
 180 }
 181
 182 void
 183 xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...)
 184 {
 185         va_list ap;
 186
 187 #ifdef DEBUG
 188         xfs_panic_mask |= XFS_PTAG_SHUTDOWN_CORRUPT;
 189 #endif
 190
 191         if (xfs_panic_mask && (xfs_panic_mask & panic_tag)
 192             && (level & CE_ALERT)) {
 193                 level &= ~CE_ALERT;
 194                 level |= CE_PANIC;
 195                 cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG.");
 196         }
 197         va_start(ap, fmt);
 198         xfs_fs_vcmn_err(level, mp, fmt, ap);
 199         va_end(ap);
 200 }
 201
 202 void
 203 xfs_error_report(
 204         char            *tag,
 205         int             level,
 206         xfs_mount_t     *mp,
 207         char            *fname,
 208         int             linenum,
 209         inst_t          *ra)
 210 {
 211         if (level <= xfs_error_level) {
 212                 xfs_cmn_err(XFS_PTAG_ERROR_REPORT,
 213                             CE_ALERT, mp,
 214                 "XFS internal error %s at line %d of file %s.  Caller 0x%p\n",
 215                             tag, linenum, fname, ra);
 216
 217                 xfs_stack_trace();
 218         }
 219 }
 220
 221 void
 222 xfs_corruption_error(
 223         char            *tag,
 224         int             level,
 225         xfs_mount_t     *mp,
 226         void            *p,
 227         char            *fname,
 228         int             linenum,
 229         inst_t          *ra)
 230 {
 231         if (level <= xfs_error_level)
 232                 xfs_hex_dump(p, 16);
 233         xfs_error_report(tag, level, mp, fname, linenum, ra);
 234 }