[blktrace.git] / blktrace.h

#ifndef BLKTRACE_H
#define BLKTRACE_H

#include <stdio.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 io_unplugs, timer_unplugs;
};

struct per_cpu_info {
	unsigned int cpu;
	unsigned int nelems;

	int fd;
	int fdblock;
	char fname[128];

	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;

#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		= be16_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>
6fe4709e	5	#include <byteswap.h>
1e3c4225 JA	6	#include <endian.h>
1e3c4225 JA	7
6fe4709e	8	#include "blktrace_api.h"
210824c3	9	#include "rbtree.h"
d0ca268b	10
71d5d4c9 JA	11	#define MINORBITS 20
	12	#define MINORMASK ((1U << MINORBITS) - 1)
	13	#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
	14	#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
	15
	16	#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
	17	#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
	18	#define DOUBLE_TO_NANO_ULL(d) ((unsigned long long)((d) * 1000000000))
	19
	20	#define min(a, b) ((a) < (b) ? (a) : (b))
6a6d3f0f	21	#define max(a, b) ((a) > (b) ? (a) : (b))
71d5d4c9	22
ae957cbc JA	23	#define t_sec(t) ((t)->bytes >> 9)
	24	#define t_kb(t) ((t)->bytes >> 10)
	25
bf0720af JA	26	typedef __u32 u32;
	27	typedef __u8 u8;
	28
71d5d4c9 JA	29	struct io_stats {
71d5d4c9 JA	30	unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
4054070a	31	unsigned long ireads, iwrites, rrqueue, wrqueue;
71d5d4c9 JA	32	unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
	33	unsigned long long iread_kb, iwrite_kb;
	34	unsigned long io_unplugs, timer_unplugs;
	35	};
	36
	37	struct per_cpu_info {
e820abd7 JA	38	unsigned int cpu;
e820abd7 JA	39	unsigned int nelems;
71d5d4c9 JA	40
71d5d4c9 JA	41	int fd;
c0e0dbc2	42	int fdblock;
71d5d4c9 JA	43	char fname[128];
	44
	45	struct io_stats io_stats;
210824c3 JA	46
	47	struct rb_root rb_last;
	48	unsigned long rb_last_entries;
	49	unsigned long last_sequence;
	50	unsigned long smallest_seq_read;
66930177 JA	51
	52	struct skip_info *skips_head;
	53	struct skip_info *skips_tail;
71d5d4c9 JA	54	};
	55
	56	extern FILE *ofp;
017d1660	57	extern int data_is_native;
71d5d4c9	58
d0ca268b	59	#define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
bfc70ad5	60	#define SUPPORTED_VERSION (0x07)
d0ca268b	61
1e3c4225	62	#if __BYTE_ORDER == __LITTLE_ENDIAN
6fe4709e JA	63	#define be16_to_cpu(x) __bswap_16(x)
	64	#define be32_to_cpu(x) __bswap_32(x)
	65	#define be64_to_cpu(x) __bswap_64(x)
	66	#define cpu_to_be16(x) __bswap_16(x)
	67	#define cpu_to_be32(x) __bswap_32(x)
	68	#define cpu_to_be64(x) __bswap_64(x)
ffcf46d8	69	#elif __BYTE_ORDER == __BIG_ENDIAN
6fe4709e JA	70	#define be16_to_cpu(x) (x)
	71	#define be32_to_cpu(x) (x)
	72	#define be64_to_cpu(x) (x)
	73	#define cpu_to_be16(x) (x)
	74	#define cpu_to_be32(x) (x)
	75	#define cpu_to_be64(x) (x)
	76	#else
	77	#error "Bad arch"
	78	#endif
	79
	80	static inline int verify_trace(struct blk_io_trace *t)
	81	{
	82	if (!CHECK_MAGIC(t)) {
	83	fprintf(stderr, "bad trace magic %x\n", t->magic);
	84	return 1;
	85	}
	86	if ((t->magic & 0xff) != SUPPORTED_VERSION) {
	87	fprintf(stderr, "unsupported trace version %x\n",
	88	t->magic & 0xff);
	89	return 1;
	90	}
d0ca268b	91
6fe4709e JA	92	return 0;
6fe4709e JA	93	}
d0ca268b	94
6fe4709e JA	95	static inline void trace_to_cpu(struct blk_io_trace *t)
6fe4709e JA	96	{
017d1660 JA	97	if (data_is_native)
	98	return;
	99
6fe4709e JA	100	t->magic = be32_to_cpu(t->magic);
	101	t->sequence = be32_to_cpu(t->sequence);
	102	t->time = be64_to_cpu(t->time);
	103	t->sector = be64_to_cpu(t->sector);
	104	t->bytes = be32_to_cpu(t->bytes);
	105	t->action = be32_to_cpu(t->action);
	106	t->pid = be32_to_cpu(t->pid);
bfc70ad5 JA	107	t->device = be32_to_cpu(t->device);
bfc70ad5 JA	108	t->cpu = be16_to_cpu(t->cpu);
6fe4709e JA	109	t->error = be16_to_cpu(t->error);
	110	t->pdu_len = be16_to_cpu(t->pdu_len);
	111	}
d0ca268b	112
017d1660 JA	113	/*
	114	* check whether data is native or not
	115	*/
e5413c3c	116	static inline int check_data_endianness(u32 magic)
017d1660	117	{
e5413c3c	118	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
017d1660 JA	119	data_is_native = 1;
	120	return 0;
	121	}
	122
e5413c3c	123	magic = __bswap_32(magic);
017d1660	124	if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
017d1660 JA	125	data_is_native = 0;
	126	return 0;
	127	}
	128
	129	return 1;
	130	}
	131
71d5d4c9 JA	132	extern void set_all_format_specs(char *);
	133	extern int add_format_spec(char *);
	134	extern void process_fmt(char , struct per_cpu_info , struct blk_io_trace *,
	135	unsigned long long, int, unsigned char *);
98f8386b AB	136	extern int valid_act_opt(int);
98f8386b AB	137	extern int find_mask_map(char *);
bfc70ad5	138	extern char *find_process_name(pid_t);
71d5d4c9	139
d0ca268b	140	#endif