1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 *
36 * lustre/obdclass/debug.c
37 *
38 * Helper routines for dumping data structs for debugging.
39 */
40
41 #define DEBUG_SUBSYSTEM D_OTHER
42
43 #include <asm/unaligned.h>
44
45 #include "../include/obd_support.h"
46 #include "../include/lustre_debug.h"
47 #include "../include/lustre_net.h"
48
49 #define LPDS sizeof(__u64)
block_debug_setup(void * addr,int len,__u64 off,__u64 id)50 int block_debug_setup(void *addr, int len, __u64 off, __u64 id)
51 {
52 LASSERT(addr);
53
54 put_unaligned_le64(off, addr);
55 put_unaligned_le64(id, addr+LPDS);
56 addr += len - LPDS - LPDS;
57 put_unaligned_le64(off, addr);
58 put_unaligned_le64(id, addr+LPDS);
59
60 return 0;
61 }
62 EXPORT_SYMBOL(block_debug_setup);
63
block_debug_check(char * who,void * addr,int end,__u64 off,__u64 id)64 int block_debug_check(char *who, void *addr, int end, __u64 off, __u64 id)
65 {
66 __u64 ne_off;
67 int err = 0;
68
69 LASSERT(addr);
70
71 ne_off = le64_to_cpu (off);
72 id = le64_to_cpu (id);
73 if (memcmp(addr, (char *)&ne_off, LPDS)) {
74 CDEBUG(D_ERROR, "%s: id %#llx offset %llu off: %#llx != %#llx\n",
75 who, id, off, *(__u64 *)addr, ne_off);
76 err = -EINVAL;
77 }
78 if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
79 CDEBUG(D_ERROR, "%s: id %#llx offset %llu id: %#llx != %#llx\n",
80 who, id, off, *(__u64 *)(addr + LPDS), id);
81 err = -EINVAL;
82 }
83
84 addr += end - LPDS - LPDS;
85 if (memcmp(addr, (char *)&ne_off, LPDS)) {
86 CDEBUG(D_ERROR, "%s: id %#llx offset %llu end off: %#llx != %#llx\n",
87 who, id, off, *(__u64 *)addr, ne_off);
88 err = -EINVAL;
89 }
90 if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
91 CDEBUG(D_ERROR, "%s: id %#llx offset %llu end id: %#llx != %#llx\n",
92 who, id, off, *(__u64 *)(addr + LPDS), id);
93 err = -EINVAL;
94 }
95
96 return err;
97 }
98 EXPORT_SYMBOL(block_debug_check);
99 #undef LPDS
100