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
dump_lniobuf(struct niobuf_local * nb)49 void dump_lniobuf(struct niobuf_local *nb)
50 {
51 CDEBUG(D_RPCTRACE,
52 "niobuf_local: file_offset=%lld, len=%d, page=%p, rc=%d\n",
53 nb->lnb_file_offset, nb->len, nb->page, nb->rc);
54 CDEBUG(D_RPCTRACE, "nb->page: index = %ld\n",
55 nb->page ? page_index(nb->page) : -1);
56 }
57 EXPORT_SYMBOL(dump_lniobuf);
58
59 #define LPDS sizeof(__u64)
block_debug_setup(void * addr,int len,__u64 off,__u64 id)60 int block_debug_setup(void *addr, int len, __u64 off, __u64 id)
61 {
62 LASSERT(addr);
63
64 put_unaligned_le64(off, addr);
65 put_unaligned_le64(id, addr+LPDS);
66 addr += len - LPDS - LPDS;
67 put_unaligned_le64(off, addr);
68 put_unaligned_le64(id, addr+LPDS);
69
70 return 0;
71 }
72 EXPORT_SYMBOL(block_debug_setup);
73
block_debug_check(char * who,void * addr,int end,__u64 off,__u64 id)74 int block_debug_check(char *who, void *addr, int end, __u64 off, __u64 id)
75 {
76 __u64 ne_off;
77 int err = 0;
78
79 LASSERT(addr);
80
81 ne_off = le64_to_cpu (off);
82 id = le64_to_cpu (id);
83 if (memcmp(addr, (char *)&ne_off, LPDS)) {
84 CDEBUG(D_ERROR, "%s: id %#llx offset %llu off: %#llx != %#llx\n",
85 who, id, off, *(__u64 *)addr, ne_off);
86 err = -EINVAL;
87 }
88 if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
89 CDEBUG(D_ERROR, "%s: id %#llx offset %llu id: %#llx != %#llx\n",
90 who, id, off, *(__u64 *)(addr + LPDS), id);
91 err = -EINVAL;
92 }
93
94 addr += end - LPDS - LPDS;
95 if (memcmp(addr, (char *)&ne_off, LPDS)) {
96 CDEBUG(D_ERROR, "%s: id %#llx offset %llu end off: %#llx != %#llx\n",
97 who, id, off, *(__u64 *)addr, ne_off);
98 err = -EINVAL;
99 }
100 if (memcmp(addr + LPDS, (char *)&id, LPDS)) {
101 CDEBUG(D_ERROR, "%s: id %#llx offset %llu end id: %#llx != %#llx\n",
102 who, id, off, *(__u64 *)(addr + LPDS), id);
103 err = -EINVAL;
104 }
105
106 return err;
107 }
108 EXPORT_SYMBOL(block_debug_check);
109 #undef LPDS
110