1/*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * Copyright (C) 2006 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#include "globals.h"
22
23struct bno_dump {
24	FILE *rfp, *wfp, *cfp;
25};
26
27static FILE *bno_dump_open(__u32 device, char rwc)
28{
29	FILE *fp;
30	char *oname;
31	int mjr, mnr;
32
33	mjr = device >> MINORBITS;
34	mnr = device & ((1 << MINORBITS) - 1);
35
36	oname = malloc(strlen(bno_dump_name) + 32);
37	sprintf(oname, "%s_%03d,%03d_%c.dat", bno_dump_name, mjr, mnr, rwc);
38	if ((fp = my_fopen(oname, "w")) == NULL)
39		perror(oname);
40	else
41		add_file(fp, oname);
42	return fp;
43}
44
45static inline void bno_dump_write(FILE *fp, struct io *iop)
46{
47	fprintf(fp, "%15.9lf %lld %lld\n", BIT_TIME(iop->t.time),
48		(long long)BIT_START(iop), (long long)BIT_END(iop));
49}
50
51void *bno_dump_alloc(__u32 device)
52{
53	struct bno_dump *bdp;
54
55	if (bno_dump_name == NULL) return NULL;
56
57	bdp = malloc(sizeof(*bdp));
58	bdp->rfp = bno_dump_open(device, 'r');
59	bdp->wfp = bno_dump_open(device, 'w');
60	bdp->cfp = bno_dump_open(device, 'c');
61
62	return bdp;
63}
64
65void bno_dump_free(void *param)
66{
67	free(param);
68}
69
70void bno_dump_add(void *handle, struct io *iop)
71{
72	struct bno_dump *bdp = handle;
73
74	if (bdp) {
75		FILE *fp = IOP_READ(iop) ? bdp->rfp : bdp->wfp;
76
77		if (fp)
78			bno_dump_write(fp, iop);
79		if (bdp->cfp)
80			bno_dump_write(bdp->cfp, iop);
81	}
82}
83