diff options
Diffstat (limited to 'btreplay/btrecord.h')
| -rw-r--r-- | btreplay/btrecord.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/btreplay/btrecord.h b/btreplay/btrecord.h new file mode 100644 index 0000000..390e14c --- /dev/null +++ b/btreplay/btrecord.h @@ -0,0 +1,95 @@ +/* + * 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[] = "1.0.0"; +static int btver_mjr = 1; +static int btver_mnr = 0; +static int btver_sub = 0; + +#endif |