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/*
* Blktrace record utility - Convert binary trace data into bunches of IOs
*
* Copyright (C) 2007 Alan D. Brunelle <Alan.Brunelle@hp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if !defined(__BTRECORD_H__)
#define __BTRECORD_H__
#include <asm/types.h>
#define BT_MAX_PKTS 512
/*
* Header for each bunch
*
* @nkts: Number of IO packets to process
* @time_stamp: Time stamp for this bunch of IOs
*/
struct io_bunch_hdr {
__u64 npkts;
__u64 time_stamp;
};
/*
* IO specifer
*
* @sector: Sector number of IO
* @nbytes: Number of bytes to process
* @rw: IO direction: 0 = write, 1 = read
*/
struct io_pkt {
__u64 sector;
__u64 nbytes;
__u32 rw;
};
/*
* Shorthand notion of a bunch of IOs
*
* @hdr: Header describing stall and how many IO packets follow
* @pkts: Individual IOs are described here
*/
struct io_bunch {
struct io_bunch_hdr hdr;
struct io_pkt pkts[BT_MAX_PKTS];
};
/*
* Header for each recorded file
*
* @version: Version information
* @genesis: Time stamp for earliest bunch
* @nbunches: Number of bunches put into the file
* @total_pkts: Number of packets to be processed
*/
struct io_file_hdr {
__u64 version;
__u64 genesis;
__u64 nbunches;
__u64 total_pkts;
};
static inline __u64 mk_btversion(int mjr, int mnr, int sub)
{
return ((mjr & 0xff) << 16) | ((mnr & 0xff) << 8) | (sub & 0xff);
}
static inline void get_btversion(__u64 version, int *mjr, int *mnr, int *sub)
{
*mjr = (int)((version >> 16) & 0xff);
*mnr = (int)((version >> 8) & 0xff);
*sub = (int)((version >> 0) & 0xff);
}
static char my_btversion[] = "0.9.3";
static int btver_mjr = 0;
static int btver_mnr = 9;
static int btver_sub = 3;
#endif
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