LU-14353 obd: move debug.c to obdecho

[fs/lustre-release.git] / lustre / obdecho / debug.c

diff --git a/lustre/obdecho/debug.c b/lustre/obdecho/debug.c
new file mode 100644 (file)
index 0000000..732d44c
--- /dev/null
+++ b/lustre/obdecho/debug.c
@@ -0,0 +1,100 @@
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2014, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/debug.c
+ *
+ * Helper routines for dumping data structs for debugging.
+ */
+
+#define DEBUG_SUBSYSTEM D_OTHER
+
+
+#include <obd_support.h>
+#include "echo_internal.h"
+#include <lustre_net.h>
+
+#define LPDS sizeof(__u64)
+int block_debug_setup(void *addr, int len, __u64 off, __u64 id)
+{
+       LASSERT(addr);
+
+       off = cpu_to_le64 (off);
+       id = cpu_to_le64 (id);
+       memcpy(addr, (char *)&off, LPDS);
+       memcpy(addr + LPDS, (char *)&id, LPDS);
+
+       addr += len - LPDS - LPDS;
+       memcpy(addr, (char *)&off, LPDS);
+       memcpy(addr + LPDS, (char *)&id, LPDS);
+
+       return 0;
+}
+EXPORT_SYMBOL(block_debug_setup);
+
+int block_debug_check(char *who, void *addr, int end, __u64 off, __u64 id)
+{
+       __u64 ne_off;
+       int err = 0;
+
+       LASSERT(addr);
+
+       ne_off = le64_to_cpu(off);
+       id = le64_to_cpu(id);
+       if (memcmp(addr, (char *)&ne_off, LPDS)) {
+               CDEBUG(D_ERROR,
+                      "%s: id %#llx offset %llu off: %#llx != %#llx\n",
+                      who, id, off, *(__u64 *)addr, ne_off);
+               err = -EINVAL;
+       }
+       if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
+               CDEBUG(D_ERROR, "%s: id %#llx offset %llu id: %#llx != %#llx\n",
+                      who, id, off, *(__u64 *)(addr + LPDS), id);
+               err = -EINVAL;
+       }
+
+       addr += end - LPDS - LPDS;
+       if (memcmp(addr, (char *)&ne_off, LPDS)) {
+               CDEBUG(D_ERROR,
+                      "%s: id %#llx offset %llu end off: %#llx != %#llx\n",
+                      who, id, off, *(__u64 *)addr, ne_off);
+               err = -EINVAL;
+       }
+       if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
+               CDEBUG(D_ERROR,
+                      "%s: id %#llx offset %llu end id: %#llx != %#llx\n",
+                      who, id, off, *(__u64 *)(addr + LPDS), id);
+               err = -EINVAL;
+       }
+
+       return err;
+}
+EXPORT_SYMBOL(block_debug_check);
+#undef LPDS