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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /fs/xfs/xfs_error.c
Initial import
Diffstat (limited to 'fs/xfs/xfs_error.c')
-rw-r--r--fs/xfs/xfs_error.c180
1 files changed, 180 insertions, 0 deletions
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
new file mode 100644
index 000000000..338e50bbf
--- /dev/null
+++ b/fs/xfs/xfs_error.c
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "xfs.h"
+#include "xfs_format.h"
+#include "xfs_fs.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_error.h"
+
+#ifdef DEBUG
+
+int xfs_etest[XFS_NUM_INJECT_ERROR];
+int64_t xfs_etest_fsid[XFS_NUM_INJECT_ERROR];
+char * xfs_etest_fsname[XFS_NUM_INJECT_ERROR];
+int xfs_error_test_active;
+
+int
+xfs_error_test(int error_tag, int *fsidp, char *expression,
+ int line, char *file, unsigned long randfactor)
+{
+ int i;
+ int64_t fsid;
+
+ if (prandom_u32() % randfactor)
+ return 0;
+
+ memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));
+
+ for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
+ if (xfs_etest[i] == error_tag && xfs_etest_fsid[i] == fsid) {
+ xfs_warn(NULL,
+ "Injecting error (%s) at file %s, line %d, on filesystem \"%s\"",
+ expression, file, line, xfs_etest_fsname[i]);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int
+xfs_errortag_add(int error_tag, xfs_mount_t *mp)
+{
+ int i;
+ int len;
+ int64_t fsid;
+
+ memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
+
+ for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
+ if (xfs_etest_fsid[i] == fsid && xfs_etest[i] == error_tag) {
+ xfs_warn(mp, "error tag #%d on", error_tag);
+ return 0;
+ }
+ }
+
+ for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
+ if (xfs_etest[i] == 0) {
+ xfs_warn(mp, "Turned on XFS error tag #%d",
+ error_tag);
+ xfs_etest[i] = error_tag;
+ xfs_etest_fsid[i] = fsid;
+ len = strlen(mp->m_fsname);
+ xfs_etest_fsname[i] = kmem_alloc(len + 1, KM_SLEEP);
+ strcpy(xfs_etest_fsname[i], mp->m_fsname);
+ xfs_error_test_active++;
+ return 0;
+ }
+ }
+
+ xfs_warn(mp, "error tag overflow, too many turned on");
+
+ return 1;
+}
+
+int
+xfs_errortag_clearall(xfs_mount_t *mp, int loud)
+{
+ int64_t fsid;
+ int cleared = 0;
+ int i;
+
+ memcpy(&fsid, mp->m_fixedfsid, sizeof(xfs_fsid_t));
+
+
+ for (i = 0; i < XFS_NUM_INJECT_ERROR; i++) {
+ if ((fsid == 0LL || xfs_etest_fsid[i] == fsid) &&
+ xfs_etest[i] != 0) {
+ cleared = 1;
+ xfs_warn(mp, "Clearing XFS error tag #%d",
+ xfs_etest[i]);
+ xfs_etest[i] = 0;
+ xfs_etest_fsid[i] = 0LL;
+ kmem_free(xfs_etest_fsname[i]);
+ xfs_etest_fsname[i] = NULL;
+ xfs_error_test_active--;
+ }
+ }
+
+ if (loud || cleared)
+ xfs_warn(mp, "Cleared all XFS error tags for filesystem");
+
+ return 0;
+}
+#endif /* DEBUG */
+
+void
+xfs_error_report(
+ const char *tag,
+ int level,
+ struct xfs_mount *mp,
+ const char *filename,
+ int linenum,
+ inst_t *ra)
+{
+ if (level <= xfs_error_level) {
+ xfs_alert_tag(mp, XFS_PTAG_ERROR_REPORT,
+ "Internal error %s at line %d of file %s. Caller %pS",
+ tag, linenum, filename, ra);
+
+ xfs_stack_trace();
+ }
+}
+
+void
+xfs_corruption_error(
+ const char *tag,
+ int level,
+ struct xfs_mount *mp,
+ void *p,
+ const char *filename,
+ int linenum,
+ inst_t *ra)
+{
+ if (level <= xfs_error_level)
+ xfs_hex_dump(p, 64);
+ xfs_error_report(tag, level, mp, filename, linenum, ra);
+ xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
+}
+
+/*
+ * Warnings specifically for verifier errors. Differentiate CRC vs. invalid
+ * values, and omit the stack trace unless the error level is tuned high.
+ */
+void
+xfs_verifier_error(
+ struct xfs_buf *bp)
+{
+ struct xfs_mount *mp = bp->b_target->bt_mount;
+
+ xfs_alert(mp, "Metadata %s detected at %pF, block 0x%llx",
+ bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
+ __return_address, bp->b_bn);
+
+ xfs_alert(mp, "Unmount and run xfs_repair");
+
+ if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
+ xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
+ xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
+ }
+
+ if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
+ xfs_stack_trace();
+}