1/*
2 * Blktrace record utility - Convert binary trace data into bunches of IOs
3 *
4 * Copyright (C) 2007 Alan D. Brunelle <Alan.Brunelle@hp.com>
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 as published by
8 *  the Free Software Foundation; either version 2 of the License, or
9 *  (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19 */
20
21#if !defined(__BTRECORD_H__)
22#define __BTRECORD_H__
23
24#include <asm/types.h>
25
26#define BT_MAX_PKTS	512
27
28/*
29 * Header for each bunch
30 *
31 * @nkts: 	Number of IO packets to process
32 * @time_stamp:	Time stamp for this bunch of IOs
33 */
34struct io_bunch_hdr {
35	__u64 npkts;
36	__u64 time_stamp;
37};
38
39/*
40 * IO specifer
41 *
42 * @sector:	Sector number of IO
43 * @nbytes:	Number of bytes to process
44 * @rw:		IO direction: 0 = write, 1 = read
45 */
46struct io_pkt {
47	__u64 sector;
48	__u64 nbytes;
49	__u32 rw;
50};
51
52/*
53 * Shorthand notion of a bunch of IOs
54 *
55 * @hdr: 	Header describing stall and how many IO packets follow
56 * @pkts: 	Individual IOs are described here
57 */
58struct io_bunch {
59	struct io_bunch_hdr hdr;
60	struct io_pkt pkts[BT_MAX_PKTS];
61};
62
63/*
64 * Header for each recorded file
65 *
66 * @version:	Version information
67 * @genesis:	Time stamp for earliest bunch
68 * @nbunches:	Number of bunches put into the file
69 * @total_pkts:	Number of packets to be processed
70 */
71struct io_file_hdr {
72	__u64 version;
73	__u64 genesis;
74	__u64 nbunches;
75	__u64 total_pkts;
76};
77
78static inline __u64 mk_btversion(int mjr, int mnr, int sub)
79{
80	return ((mjr & 0xff) << 16) | ((mnr & 0xff) << 8) | (sub & 0xff);
81}
82
83static inline void get_btversion(__u64 version, int *mjr, int *mnr, int *sub)
84{
85	*mjr = (int)((version >> 16) & 0xff);
86	*mnr = (int)((version >>  8) & 0xff);
87	*sub = (int)((version >>  0) & 0xff);
88}
89
90static char my_btversion[] = "1.0.0";
91static int btver_mjr = 1;
92static int btver_mnr = 0;
93static int btver_sub = 0;
94
95#endif
96