[blktrace.git] / blktrace.h

#ifndef BLKTRACE_H
#define BLKTRACE_H

#include <stdio.h>
#include <limits.h>
#include <byteswap.h>
#include <endian.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)

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