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