1 /* 2 * Blktrace record utility - Convert binary trace data into bunches of IOs 3 * 4 * Copyright (C) 2007 Alan D. Brunelle <Alan.Brunelle (at) 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 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 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
