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
23static void handle_g(struct io *g_iop)
24{
25	struct io *q_iop;
26
27	iostat_getrq(g_iop);
28
29	q_iop = dip_find_sec(g_iop->dip, IOP_Q, g_iop->t.sector);
30	if (q_iop) {
31		q_iop->g_time = g_iop->t.time;
32		update_q2g(q_iop, tdelta(q_iop->t.time, g_iop->t.time));
33		if (q_iop->s_time != 0)
34			update_s2g(q_iop, tdelta(q_iop->s_time, g_iop->t.time));
35	}
36}
37
38static void handle_s(struct io *s_iop)
39{
40	struct io *q_iop = dip_find_sec(s_iop->dip, IOP_Q, s_iop->t.sector);
41
42	if (q_iop)
43		q_iop->s_time = s_iop->t.time;
44}
45
46static void handle_i(struct io *i_iop)
47{
48	struct io *q_iop = dip_find_sec(i_iop->dip, IOP_Q, i_iop->t.sector);
49
50	if (q_iop) {
51		q_iop->i_time = i_iop->t.time;
52		if (q_iop->g_time != (__u64)-1)
53			update_g2i(q_iop, tdelta(q_iop->g_time, i_iop->t.time));
54	}
55}
56
57static void handle_m(struct io *m_iop)
58{
59	struct io *q_iop;
60
61	iostat_merge(m_iop);
62
63	q_iop = dip_find_sec(m_iop->dip, IOP_Q, m_iop->t.sector);
64	if (q_iop) {
65		q_iop->m_time = m_iop->t.time;
66		update_q2m(q_iop, tdelta(q_iop->t.time, m_iop->t.time));
67	}
68
69	if (m_iop->dip->n_act_q != 0)
70		m_iop->dip->n_act_q--;
71}
72
73void trace_sleeprq(struct io *s_iop)
74{
75	if (s_iop->t.bytes == 0)
76		return;
77	if (io_setup(s_iop, IOP_S))
78		handle_s(s_iop);
79	io_release(s_iop);
80}
81
82void trace_getrq(struct io *g_iop)
83{
84	if (g_iop->t.bytes == 0)
85		return;
86	if (io_setup(g_iop, IOP_G))
87		handle_g(g_iop);
88	io_release(g_iop);
89}
90
91void trace_insert(struct io *i_iop)
92{
93	if (i_iop->t.bytes == 0)
94		return;
95	if (io_setup(i_iop, IOP_I))
96		handle_i(i_iop);
97	io_release(i_iop);
98}
99
100void trace_merge(struct io *m_iop)
101{
102	if (m_iop->t.bytes == 0)
103		return;
104	if (io_setup(m_iop, IOP_M))
105		handle_m(m_iop);
106	io_release(m_iop);
107}
108