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_dir.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_dir_sf.h"
  31 #include "xfs_dir2_sf.h"
  32 #include "xfs_attr_sf.h"
  33 #include "xfs_dinode.h"
  34 #include "xfs_inode.h"
  35 #include "xfs_utils.h"
  36 #include "xfs_error.h"
  37
  38 #ifdef DEBUG
  39
  40 int     xfs_etrap[XFS_ERROR_NTRAP] = {
  41         0,
  42 };
  43
  44 int
  45 xfs_error_trap(int e)
  46 {
  47         int i;
  48
  49         if (!e)
  50                 return 0;
  51         for (i = 0; i < XFS_ERROR_NTRAP; i++) {
  52                 if (xfs_etrap[i] == 0)
  53                         break;
  54                 if (e != xfs_etrap[i])
  55                         continue;
  56                 cmn_err(CE_NOTE, "xfs_error_trap: error %d", e);
  57                 BUG();
  58                 break;
  59         }
  60         return e;
  61 }
  62 #endif
  63
  64 #if (defined(DEBUG) || defined(INDUCE_IO_ERROR))
  65
  66 int     xfs_etest[XFS_NUM_INJECT_ERROR];
  67 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
  68 char *  xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
  69
  70 void
  71 xfs_error_test_init(void)
  72 {
  73         memset(xfs_etest, 0, sizeof(xfs_etest));
  74         memset(xfs_etest_fsid, 0, sizeof(xfs_etest_fsid));
  75         memset(xfs_etest_fsname, 0, sizeof(xfs_etest_fsname));
  76 }
  77
  78 int
  79 xfs_error_test(int error_tag, int *fsidp, char *expression,
  80                int line, char *file, unsigned long randfactor)
  81 {
  82         int i;
  83         int64_t fsid;
  84
  85         if (random() % randfactor)
  86                 return 0;
  87
  88         memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
  89
  90         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
  91                 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
  92                         cmn_err(CE_WARN,
  93         "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
  94                                 expression, file, line, xfs_etest_fsname[i]);
  95                         return 1;
  96                 }
  97         }
  98
  99         return 0;
 100 }
 101
 102 int
 103 xfs_errortag_add(int error_tag, xfs_mount_t *mp)
 104 {
 105         int i;
 106         int len;
 107         int64_t fsid;
 108
 109         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 110
 111         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 112                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
 113                         cmn_err(CE_WARN, "XFS error tag #%d on", error_tag);
 114                         return 0;
 115                 }
 116         }
 117
 118         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++)  {
 119                 if (xfs_etest[i] == 0) {
 120                         cmn_err(CE_WARN, "Turned on XFS error tag #%d",
 121                                 error_tag);
 122                         xfs_etest[i] = error_tag;
 123                         xfs_etest_fsid[i] = fsid;
 124                         len = strlen(mp->m_fsname);
 125                         xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
 126                         strcpy(xfs_etest_fsname[i], mp->m_fsname);
 127                         return 0;
 128                 }
 129         }
 130
 131         cmn_err(CE_WARN, "error tag overflow, too many turned on");
 132
 133         return 1;
 134 }
 135
 136 int
 137 xfs_errortag_clear(int error_tag, xfs_mount_t *mp)
 138 {
 139         int i;
 140         int64_t fsid;
 141
 142         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 143
 144         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 145                 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
 146                         xfs_etest[i] = 0;
 147                         xfs_etest_fsid[i] = 0LL;
 148                         kmem_free(xfs_etest_fsname[i],
 149                                   strlen(xfs_etest_fsname[i]) + 1);
 150                         xfs_etest_fsname[i] = NULL;
 151                         cmn_err(CE_WARN, "Cleared XFS error tag #%d",
 152                                 error_tag);
 153                         return 0;
 154                 }
 155         }
 156
 157         cmn_err(CE_WARN, "XFS error tag %d not on", error_tag);
 158
 159         return 1;
 160 }
 161
 162 int
 163 xfs_errortag_clearall_umount(int64_t fsid, char *fsname, int loud)
 164 {
 165         int i;
 166         int cleared = 0;
 167
 168         for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
 169                 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
 170                      xfs_etest[i] != 0) {
 171                         cleared = 1;
 172                         cmn_err(CE_WARN, "Clearing XFS error tag #%d",
 173                                 xfs_etest[i]);
 174                         xfs_etest[i] = 0;
 175                         xfs_etest_fsid[i] = 0LL;
 176                         kmem_free(xfs_etest_fsname[i],
 177                                   strlen(xfs_etest_fsname[i]) + 1);
 178                         xfs_etest_fsname[i] = NULL;
 179                 }
 180         }
 181
 182         if (loud || cleared)
 183                 cmn_err(CE_WARN,
 184                         "Cleared all XFS error tags for filesystem \"%s\"",
 185                         fsname);
 186
 187         return 0;
 188 }
 189
 190 int
 191 xfs_errortag_clearall(xfs_mount_t *mp)
 192 {
 193         int64_t fsid;
 194
 195         memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
 196
 197         return xfs_errortag_clearall_umount(fsid, mp->m_fsname, 1);
 198 }
 199 #endif /* DEBUG || INDUCE_IO_ERROR */
 200
 201 static void
 202 xfs_fs_vcmn_err(int level, xfs_mount_t *mp, char *fmt, va_list ap)
 203 {
 204         if (mp != NULL) {
 205                 char    *newfmt;
 206                 int     len = 16 + mp->m_fsname_len + strlen(fmt);
 207
 208                 newfmt = kmem_alloc(len, KM_SLEEP);
 209                 sprintf(newfmt, "Filesystem \"%s\": %s", mp->m_fsname, fmt);
 210                 icmn_err(level, newfmt, ap);
 211                 kmem_free(newfmt, len);
 212         } else {
 213                 icmn_err(level, fmt, ap);
 214         }
 215 }
 216
 217 void
 218 xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...)
 219 {
 220         va_list ap;
 221
 222         va_start(ap, fmt);
 223         xfs_fs_vcmn_err(level, mp, fmt, ap);
 224         va_end(ap);
 225 }
 226
 227 void
 228 xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...)
 229 {
 230         va_list ap;
 231
 232 #ifdef DEBUG
 233         xfs_panic_mask |= XFS_PTAG_SHUTDOWN_CORRUPT;
 234 #endif
 235
 236         if (xfs_panic_mask && (xfs_panic_mask & panic_tag)
 237             && (level & CE_ALERT)) {
 238                 level &= ~CE_ALERT;
 239                 level |= CE_PANIC;
 240                 cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG.");
 241         }
 242         va_start(ap, fmt);
 243         xfs_fs_vcmn_err(level, mp, fmt, ap);
 244         va_end(ap);
 245 }
 246
 247 void
 248 xfs_error_report(
 249         char            *tag,
 250         int             level,
 251         xfs_mount_t     *mp,
 252         char            *fname,
 253         int             linenum,
 254         inst_t          *ra)
 255 {
 256         if (level <= xfs_error_level) {
 257                 xfs_cmn_err(XFS_PTAG_ERROR_REPORT,
 258                             CE_ALERT, mp,
 259                 "XFS internal error %s at line %d of file %s.  Caller 0x%p\n",
 260                             tag, linenum, fname, ra);
 261
 262                 xfs_stack_trace();
 263         }
 264 }
 265
 266 STATIC void
 267 xfs_hex_dump(void *p, int length)
 268 {
 269         __uint8_t *uip = (__uint8_t*)p;
 270         int     i;
 271         char    sbuf[128], *s;
 272
 273         s = sbuf;
 274         *s = '\0';
 275         for (i=0; i<length; i++, uip++) {
 276                 if ((i % 16) == 0) {
 277                         if (*s != '\0')
 278                                 cmn_err(CE_ALERT, "%s\n", sbuf);
 279                         s = sbuf;
 280                         sprintf(s, "0x%x: ", i);
 281                         while( *s != '\0')
 282                                 s++;
 283                 }
 284                 sprintf(s, "%02x ", *uip);
 285
 286                 /*
 287                  * the kernel sprintf is a void; user sprintf returns
 288                  * the sprintf'ed string's length.  Find the new end-
 289                  * of-string
 290                  */
 291                 while( *s != '\0')
 292                         s++;
 293         }
 294         cmn_err(CE_ALERT, "%s\n", sbuf);
 295 }
 296
 297 void
 298 xfs_corruption_error(
 299         char            *tag,
 300         int             level,
 301         xfs_mount_t     *mp,
 302         void            *p,
 303         char            *fname,
 304         int             linenum,
 305         inst_t          *ra)
 306 {
 307         if (level <= xfs_error_level)
 308                 xfs_hex_dump(p, 16);
 309         xfs_error_report(tag, level, mp, fname, linenum, ra);
 310 }