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_format.h" 20 #include "xfs_fs.h" 21 #include "xfs_log_format.h" 22 #include "xfs_trans_resv.h" 23 #include "xfs_sb.h" 24 #include "xfs_ag.h" 25 #include "xfs_mount.h" 26 #include "xfs_error.h" 27 28 #ifdef DEBUG 29 30 int xfs_etrap[XFS_ERROR_NTRAP] = { 31 0, 32 }; 33 34 int 35 xfs_error_trap(int e) 36 { 37 int i; 38 39 if (!e) 40 return 0; 41 for (i = 0; i < XFS_ERROR_NTRAP; i++) { 42 if (xfs_etrap[i] == 0) 43 break; 44 if (e != xfs_etrap[i]) 45 continue; 46 xfs_notice(NULL, "%s: error %d", __func__, e); 47 BUG(); 48 break; 49 } 50 return e; 51 } 52 53 int xfs_etest[XFS_NUM_INJECT_ERROR]; 54 int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR]; 55 char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR]; 56 int xfs_error_test_active; 57 58 int 59 xfs_error_test(int error_tag, int *fsidp, char *expression, 60 int line, char *file, unsigned long randfactor) 61 { 62 int i; 63 int64_t fsid; 64 65 if (prandom_u32() % randfactor) 66 return 0; 67 68 memcpy(&fsid, fsidp, sizeof(xfs_fsid_t)); 69 70 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) { 71 if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) { 72 xfs_warn(NULL, 73 "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"", 74 expression, file, line, xfs_etest_fsname[i]); 75 return 1; 76 } 77 } 78 79 return 0; 80 } 81 82 int 83 xfs_errortag_add(int error_tag, xfs_mount_t *mp) 84 { 85 int i; 86 int len; 87 int64_t fsid; 88 89 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t)); 90 91 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) { 92 if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) { 93 xfs_warn(mp, "error tag #%d on", error_tag); 94 return 0; 95 } 96 } 97 98 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) { 99 if (xfs_etest[i] == 0) { 100 xfs_warn(mp, "Turned on XFS error tag #%d", 101 error_tag); 102 xfs_etest[i] = error_tag; 103 xfs_etest_fsid[i] = fsid; 104 len = strlen(mp->m_fsname); 105 xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP); 106 strcpy(xfs_etest_fsname[i], mp->m_fsname); 107 xfs_error_test_active++; 108 return 0; 109 } 110 } 111 112 xfs_warn(mp, "error tag overflow, too many turned on"); 113 114 return 1; 115 } 116 117 int 118 xfs_errortag_clearall(xfs_mount_t *mp, int loud) 119 { 120 int64_t fsid; 121 int cleared = 0; 122 int i; 123 124 memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t)); 125 126 127 for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) { 128 if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) && 129 xfs_etest[i] != 0) { 130 cleared = 1; 131 xfs_warn(mp, "Clearing XFS error tag #%d", 132 xfs_etest[i]); 133 xfs_etest[i] = 0; 134 xfs_etest_fsid[i] = 0LL; 135 kmem_free(xfs_etest_fsname[i]); 136 xfs_etest_fsname[i] = NULL; 137 xfs_error_test_active--; 138 } 139 } 140 141 if (loud || cleared) 142 xfs_warn(mp, "Cleared all XFS error tags for filesystem"); 143 144 return 0; 145 } 146 #endif /* DEBUG */ 147 148 void 149 xfs_error_report( 150 const char *tag, 151 int level, 152 struct xfs_mount *mp, 153 const char *filename, 154 int linenum, 155 inst_t *ra) 156 { 157 if (level <= xfs_error_level) { 158 xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT, 159 "Internal error %s at line %d of file %s. Caller %pF", 160 tag, linenum, filename, ra); 161 162 xfs_stack_trace(); 163 } 164 } 165 166 void 167 xfs_corruption_error( 168 const char *tag, 169 int level, 170 struct xfs_mount *mp, 171 void *p, 172 const char *filename, 173 int linenum, 174 inst_t *ra) 175 { 176 if (level <= xfs_error_level) 177 xfs_hex_dump(p, 64); 178 xfs_error_report(tag, level, mp, filename, linenum, ra); 179 xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair"); 180 } 181 182 /* 183 * Warnings specifically for verifier errors. Differentiate CRC vs. invalid 184 * values, and omit the stack trace unless the error level is tuned high. 185 */ 186 void 187 xfs_verifier_error( 188 struct xfs_buf *bp) 189 { 190 struct xfs_mount *mp = bp->b_target->bt_mount; 191 192 xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx", 193 bp->b_error == EFSBADCRC ? "CRC error" : "corruption", 194 __return_address, bp->b_bn); 195 196 xfs_alert(mp, "Unmount and run xfs_repair"); 197 198 if (xfs_error_level >= XFS_ERRLEVEL_LOW) { 199 xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:"); 200 xfs_hex_dump(xfs_buf_offset(bp, 0), 64); 201 } 202 203 if (xfs_error_level >= XFS_ERRLEVEL_HIGH) 204 xfs_stack_trace(); 205 } 206