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 */
34 struct 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 */
46 struct 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 */
58 struct 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 */
71 struct io_file_hdr {
72 __u64 version;
73 __u64 genesis;
74 __u64 nbunches;
75 __u64 total_pkts;
76 };
77
mk_btversion(int mjr,int mnr,int sub)78 static inline __u64 mk_btversion(int mjr, int mnr, int sub)
79 {
80 return ((mjr & 0xff) << 16) | ((mnr & 0xff) << 8) | (sub & 0xff);
81 }
82
get_btversion(__u64 version,int * mjr,int * mnr,int * sub)83 static 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
90 static char my_btversion[] = "1.0.0";
91 static int btver_mjr = 1;
92 static int btver_mnr = 0;
93 static int btver_sub = 0;
94
95 #endif
96