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 #endif
  62
  63 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
  64
  65 int     xfs_etest[XFS_NUM_INJECT_ERROR];
  66 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
  67 char *  xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
  68
  69 int
  70 xfs_error_test(int error_tag, int *fsidp, char *expression,
  71                int line, char *file, unsigned long randfactor)
  72 {
  73         int i;
  74         int64_t fsid;
  75
  76         if (random32() % randfactor)
  77                 return 0;
  78
  79         memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
  80
  81         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  82                 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
  83                         cmn_err(CE_WARN,
  84         "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
  85                                 expression, file, line, xfs_etest_fsname[i]);
  86                         return 1;
  87                 }
  88         }
  89
  90         return 0;
  91 }
  92
  93 int
  94 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
  95 {
  96         int i;
  97         int len;
  98         int64_t fsid;
  99
 100         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 101
 102         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 103                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
 104                         cmn_err(CE_WARN, "XFS error tag #%d on", error_tag);
 105                         return 0;
 106                 }
 107         }
 108
 109         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 110                 if (xfs_etest[i] == 0) {
 111                         cmn_err(CE_WARN, "Turned on XFS error tag #%d",
 112                                 error_tag);
 113                         xfs_etest[i] = error_tag;
 114                         xfs_etest_fsid[i] = fsid;
 115                         len = strlen(mp->m_fsname);
 116                         xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 117                         strcpy(xfs_etest_fsname[i], mp->m_fsname);
 118                         return 0;
 119                 }
 120         }
 121
 122         cmn_err(CE_WARN, "error tag overflow, too many turned on");
 123
 124         return 1;
 125 }
 126
 127 int
 128 xfs_errortag_clearall(xfs_mount_t *mp, int loud)
 129 {
 130         int64_t fsid;
 131         int cleared = 0;
 132         int i;
 133
 134         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 135
 136
 137         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 138                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 139                      xfs_etest[i] != 0) {
 140                         cleared = 1;
 141                         cmn_err(CE_WARN, "Clearing XFS error tag #%d",
 142                                 xfs_etest[i]);
 143                         xfs_etest[i] = 0;
 144                         xfs_etest_fsid[i] = 0LL;
 145                         kmem_free(xfs_etest_fsname[i]);
 146                         xfs_etest_fsname[i] = NULL;
 147                 }
 148         }
 149
 150         if (loud || cleared)
 151                 cmn_err(CE_WARN,
 152                         "Cleared all XFS error tags for filesystem \"%s\"",
 153                         mp->m_fsname);
 154
 155         return 0;
 156 }
 157 #endif /* DEBUG || INDUCE_IO_ERROR */
 158
 159 static void
 160 xfs_fs_vcmn_err(int level, xfs_mount_t *mp, char *fmt, va_list ap)
 161 {
 162         if (mp != NULL) {
 163                 char    *newfmt;
 164                 int     len = 16 + mp->m_fsname_len + strlen(fmt);
 165
 166                 newfmt = kmem_alloc(len, KM_SLEEP);
 167                 sprintf(newfmt, "Filesystem \"%s\": %s", mp->m_fsname, fmt);
 168                 icmn_err(level, newfmt, ap);
 169                 kmem_free(newfmt);
 170         } else {
 171                 icmn_err(level, fmt, ap);
 172         }
 173 }
 174
 175 void
 176 xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...)
 177 {
 178         va_list ap;
 179
 180         va_start(ap, fmt);
 181         xfs_fs_vcmn_err(level, mp, fmt, ap);
 182         va_end(ap);
 183 }
 184
 185 void
 186 xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...)
 187 {
 188         va_list ap;
 189
 190 #ifdef DEBUG
 191         xfs_panic_mask |= XFS_PTAG_SHUTDOWN_CORRUPT;
 192 #endif
 193
 194         if (xfs_panic_mask && (xfs_panic_mask & panic_tag)
 195             && (level & CE_ALERT)) {
 196                 level &= ~CE_ALERT;
 197                 level |= CE_PANIC;
 198                 cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG.");
 199         }
 200         va_start(ap, fmt);
 201         xfs_fs_vcmn_err(level, mp, fmt, ap);
 202         va_end(ap);
 203 }
 204
 205 void
 206 xfs_error_report(
 207         char            *tag,
 208         int             level,
 209         xfs_mount_t     *mp,
 210         char            *fname,
 211         int             linenum,
 212         inst_t          *ra)
 213 {
 214         if (level <= xfs_error_level) {
 215                 xfs_cmn_err(XFS_PTAG_ERROR_REPORT,
 216                             CE_ALERT, mp,
 217                 "XFS internal error %s at line %d of file %s.  Caller 0x%p\n",
 218                             tag, linenum, fname, ra);
 219
 220                 xfs_stack_trace();
 221         }
 222 }
 223
 224 void
 225 xfs_corruption_error(
 226         char            *tag,
 227         int             level,
 228         xfs_mount_t     *mp,
 229         void            *p,
 230         char            *fname,
 231         int             linenum,
 232         inst_t          *ra)
 233 {
 234         if (level <= xfs_error_level)
 235                 xfs_hex_dump(p, 16);
 236         xfs_error_report(tag, level, mp, fname, linenum, ra);
 237 }