summaryrefslogtreecommitdiff
path: root/blktrace.h
blob: 944fc084cc090d5736911a8ca304bc8a2e9eacf6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
#ifndef BLKTRACE_H
#define BLKTRACE_H

#include <stdio.h>
#include <limits.h>
#include <byteswap.h>
#include <endian.h>
#include <sys/types.h>

#include "blktrace_api.h"
#include "rbtree.h"

#define MINORBITS	20
#define MINORMASK	((1U << MINORBITS) - 1)
#define MAJOR(dev)	((unsigned int) ((dev) >> MINORBITS))
#define MINOR(dev)	((unsigned int) ((dev) & MINORMASK))

#define SECONDS(x) 		((unsigned long long)(x) / 1000000000)
#define NANO_SECONDS(x)		((unsigned long long)(x) % 1000000000)
#define DOUBLE_TO_NANO_ULL(d)	((unsigned long long)((d) * 1000000000))

#define min(a, b)	((a) < (b) ? (a) : (b))
#define max(a, b)	((a) > (b) ? (a) : (b))

#define t_sec(t)	((t)->bytes >> 9)
#define t_kb(t)		((t)->bytes >> 10)
#define t_b(t)		((t)->bytes & 1023)

typedef __u32 u32;
typedef __u8 u8;

struct io_stats {
	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
	unsigned long ireads, iwrites, rrqueue, wrqueue;
	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
	unsigned long long qread_b, qwrite_b, cread_b, cwrite_b;
	unsigned long long iread_kb, iwrite_kb;
	unsigned long long mread_kb, mwrite_kb;
	unsigned long long mread_b, mwrite_b, iread_b, iwrite_b;
	unsigned long qreads_pc, qwrites_pc, ireads_pc, iwrites_pc;
	unsigned long rrqueue_pc, wrqueue_pc, creads_pc, cwrites_pc;
	unsigned long long qread_kb_pc, qwrite_kb_pc, iread_kb_pc, iwrite_kb_pc;
	unsigned long long qread_b_pc, qwrite_b_pc, iread_b_pc, iwrite_b_pc;
	unsigned long io_unplugs, timer_unplugs;
};

struct per_cpu_info {
	unsigned int cpu;
	unsigned int nelems;

	int fd;
	int fdblock;
	char fname[PATH_MAX];

	struct io_stats io_stats;

	struct rb_root rb_last;
	unsigned long rb_last_entries;
	unsigned long last_sequence;
	unsigned long smallest_seq_read;

	struct skip_info *skips_head;
	struct skip_info *skips_tail;
};

extern FILE *ofp;
extern int data_is_native;
extern struct timespec abs_start_time;

#define CHECK_MAGIC(t)		(((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
#define SUPPORTED_VERSION	(0x07)

#if __BYTE_ORDER == __LITTLE_ENDIAN
#define be16_to_cpu(x)		__bswap_16(x)
#define be32_to_cpu(x)		__bswap_32(x)
#define be64_to_cpu(x)		__bswap_64(x)
#define cpu_to_be16(x)		__bswap_16(x)
#define cpu_to_be32(x)		__bswap_32(x)
#define cpu_to_be64(x)		__bswap_64(x)
#elif __BYTE_ORDER == __BIG_ENDIAN
#define be16_to_cpu(x)		(x)
#define be32_to_cpu(x)		(x)
#define be64_to_cpu(x)		(x)
#define cpu_to_be16(x)		(x)
#define cpu_to_be32(x)		(x)
#define cpu_to_be64(x)		(x)
#else
#error "Bad arch"
#endif

static inline int verify_trace(struct blk_io_trace *t)
{
	if (!CHECK_MAGIC(t)) {
		fprintf(stderr, "bad trace magic %x\n", t->magic);
		return 1;
	}
	if ((t->magic & 0xff) != SUPPORTED_VERSION) {
		fprintf(stderr, "unsupported trace version %x\n", 
			t->magic & 0xff);
		return 1;
	}

	return 0;
}

static inline void trace_to_cpu(struct blk_io_trace *t)
{
	if (data_is_native)
		return;

	t->magic	= be32_to_cpu(t->magic);
	t->sequence	= be32_to_cpu(t->sequence);
	t->time		= be64_to_cpu(t->time);
	t->sector	= be64_to_cpu(t->sector);
	t->bytes	= be32_to_cpu(t->bytes);
	t->action	= be32_to_cpu(t->action);
	t->pid		= be32_to_cpu(t->pid);
	t->device	= be32_to_cpu(t->device);
	t->cpu		= be32_to_cpu(t->cpu);
	t->error	= be16_to_cpu(t->error);
	t->pdu_len	= be16_to_cpu(t->pdu_len);
}

/*
 * check whether data is native or not
 */
static inline int check_data_endianness(u32 magic)
{
	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
		data_is_native = 1;
		return 0;
	}

	magic = __bswap_32(magic);
	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
		data_is_native = 0;
		return 0;
	}

	return 1;
}

extern void set_all_format_specs(char *);
extern int add_format_spec(char *);
extern void process_fmt(char *, struct per_cpu_info *, struct blk_io_trace *,
			unsigned long long, int, unsigned char *);
extern int valid_act_opt(int);
extern int find_mask_map(char *);
extern char *find_process_name(pid_t);

#endif