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