[blktrace.git] / blktrace.h

#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
Commit	Line	Data
6fe4709e JA	1	#ifndef BLKTRACE_H
6fe4709e JA	2	#define BLKTRACE_H
d0ca268b	3
98f8386b	4	#include <stdio.h>
c3ce73f5	5	#include <limits.h>
6fe4709e	6	#include <byteswap.h>
1e3c4225	7	#include <endian.h>
f55e6d10	8	#include <sys/types.h>
1e3c4225	9
6fe4709e	10	#include "blktrace_api.h"
210824c3	11	#include "rbtree.h"
d0ca268b	12
71d5d4c9 JA	13	#define MINORBITS 20
	14	#define MINORMASK ((1U << MINORBITS) - 1)
	15	#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
	16	#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
	17
	18	#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
	19	#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
	20	#define DOUBLE_TO_NANO_ULL(d) ((unsigned long long)((d) * 1000000000))
	21
	22	#define min(a, b) ((a) < (b) ? (a) : (b))
6a6d3f0f	23	#define max(a, b) ((a) > (b) ? (a) : (b))
71d5d4c9	24
ae957cbc JA	25	#define t_sec(t) ((t)->bytes >> 9)
ae957cbc JA	26	#define t_kb(t) ((t)->bytes >> 10)
cd0ae0f6	27	#define t_b(t) ((t)->bytes & 1023)
ae957cbc	28
bf0720af JA	29	typedef __u32 u32;
	30	typedef __u8 u8;
	31
71d5d4c9 JA	32	struct io_stats {
71d5d4c9 JA	33	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
4054070a	34	unsigned long ireads, iwrites, rrqueue, wrqueue;
71d5d4c9	35	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
cd0ae0f6	36	unsigned long long qread_b, qwrite_b, cread_b, cwrite_b;
71d5d4c9	37	unsigned long long iread_kb, iwrite_kb;
fb2ec796	38	unsigned long long mread_kb, mwrite_kb;
cd0ae0f6	39	unsigned long long mread_b, mwrite_b, iread_b, iwrite_b;
801646d6 CS	40	unsigned long qreads_pc, qwrites_pc, ireads_pc, iwrites_pc;
	41	unsigned long rrqueue_pc, wrqueue_pc, creads_pc, cwrites_pc;
	42	unsigned long long qread_kb_pc, qwrite_kb_pc, iread_kb_pc, iwrite_kb_pc;
cd0ae0f6	43	unsigned long long qread_b_pc, qwrite_b_pc, iread_b_pc, iwrite_b_pc;
71d5d4c9 JA	44	unsigned long io_unplugs, timer_unplugs;
	45	};
	46
	47	struct per_cpu_info {
e820abd7 JA	48	unsigned int cpu;
e820abd7 JA	49	unsigned int nelems;
71d5d4c9 JA	50
71d5d4c9 JA	51	int fd;
c0e0dbc2	52	int fdblock;
c3ce73f5	53	char fname[PATH_MAX];
71d5d4c9 JA	54
71d5d4c9 JA	55	struct io_stats io_stats;
210824c3 JA	56
	57	struct rb_root rb_last;
	58	unsigned long rb_last_entries;
	59	unsigned long last_sequence;
	60	unsigned long smallest_seq_read;
66930177 JA	61
	62	struct skip_info *skips_head;
	63	struct skip_info *skips_tail;
71d5d4c9 JA	64	};
	65
	66	extern FILE *ofp;
017d1660	67	extern int data_is_native;
7bd4fd0a	68	extern struct timespec abs_start_time;
71d5d4c9	69
d0ca268b	70	#define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
bfc70ad5	71	#define SUPPORTED_VERSION (0x07)
d0ca268b	72
1e3c4225	73	#if __BYTE_ORDER == __LITTLE_ENDIAN
6fe4709e JA	74	#define be16_to_cpu(x) __bswap_16(x)
	75	#define be32_to_cpu(x) __bswap_32(x)
	76	#define be64_to_cpu(x) __bswap_64(x)
	77	#define cpu_to_be16(x) __bswap_16(x)
	78	#define cpu_to_be32(x) __bswap_32(x)
	79	#define cpu_to_be64(x) __bswap_64(x)
ffcf46d8	80	#elif __BYTE_ORDER == __BIG_ENDIAN
6fe4709e JA	81	#define be16_to_cpu(x) (x)
	82	#define be32_to_cpu(x) (x)
	83	#define be64_to_cpu(x) (x)
	84	#define cpu_to_be16(x) (x)
	85	#define cpu_to_be32(x) (x)
	86	#define cpu_to_be64(x) (x)
	87	#else
	88	#error "Bad arch"
	89	#endif
	90
	91	static inline int verify_trace(struct blk_io_trace *t)
	92	{
	93	if (!CHECK_MAGIC(t)) {
	94	fprintf(stderr, "bad trace magic %x\n", t->magic);
	95	return 1;
	96	}
	97	if ((t->magic & 0xff) != SUPPORTED_VERSION) {
	98	fprintf(stderr, "unsupported trace version %x\n",
	99	t->magic & 0xff);
	100	return 1;
	101	}
d0ca268b	102
6fe4709e JA	103	return 0;
6fe4709e JA	104	}
d0ca268b	105
6fe4709e JA	106	static inline void trace_to_cpu(struct blk_io_trace *t)
6fe4709e JA	107	{
017d1660 JA	108	if (data_is_native)
	109	return;
	110
6fe4709e JA	111	t->magic = be32_to_cpu(t->magic);
	112	t->sequence = be32_to_cpu(t->sequence);
	113	t->time = be64_to_cpu(t->time);
	114	t->sector = be64_to_cpu(t->sector);
	115	t->bytes = be32_to_cpu(t->bytes);
	116	t->action = be32_to_cpu(t->action);
	117	t->pid = be32_to_cpu(t->pid);
bfc70ad5	118	t->device = be32_to_cpu(t->device);
8e8bb835	119	t->cpu = be32_to_cpu(t->cpu);
6fe4709e JA	120	t->error = be16_to_cpu(t->error);
	121	t->pdu_len = be16_to_cpu(t->pdu_len);
	122	}
d0ca268b	123
017d1660 JA	124	/*
	125	* check whether data is native or not
	126	*/
e5413c3c	127	static inline int check_data_endianness(u32 magic)
017d1660	128	{
e5413c3c	129	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
017d1660 JA	130	data_is_native = 1;
	131	return 0;
	132	}
	133
e5413c3c	134	magic = __bswap_32(magic);
017d1660	135	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
017d1660 JA	136	data_is_native = 0;
	137	return 0;
	138	}
	139
	140	return 1;
	141	}
	142
71d5d4c9 JA	143	extern void set_all_format_specs(char *);
	144	extern int add_format_spec(char *);
	145	extern void process_fmt(char , struct per_cpu_info , struct blk_io_trace *,
	146	unsigned long long, int, unsigned char *);
98f8386b AB	147	extern int valid_act_opt(int);
98f8386b AB	148	extern int find_mask_map(char *);
bfc70ad5	149	extern char *find_process_name(pid_t);
71d5d4c9	150
d0ca268b	151	#endif