Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / xfs / xfs_error.c

diff --git a/kernel/fs/xfs/xfs_error.c b/kernel/fs/xfs/xfs_error.c
new file mode 100644 (file)
index 0000000..338e50b
--- /dev/null
+++ b/kernel/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();
+}