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#ifndef BLKTRACE_H
#define BLKTRACE_H
#include <byteswap.h>
#include <asm/types.h>
#include <asm/byteorder.h>
#include "blktrace_api.h"
#define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
#define SUPPORTED_VERSION (0x04)
#if defined(__LITTLE_ENDIAN_BITFIELD)
#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 defined(__BIG_ENDIAN_BITFIELD)
#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_be(struct blk_io_trace *t)
{
t->magic = cpu_to_be32(t->magic);
t->sequence = cpu_to_be32(t->sequence);
t->time = cpu_to_be64(t->time);
t->sector = cpu_to_be64(t->sector);
t->bytes = cpu_to_be32(t->bytes);
t->action = cpu_to_be32(t->action);
t->pid = cpu_to_be32(t->pid);
t->cpu = cpu_to_be32(t->cpu);
t->error = cpu_to_be16(t->error);
t->pdu_len = cpu_to_be16(t->pdu_len);
/* t->comm is a string (endian neutral) */
}
static inline void trace_to_cpu(struct blk_io_trace *t)
{
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->cpu = be32_to_cpu(t->cpu);
t->error = be16_to_cpu(t->error);
t->pdu_len = be16_to_cpu(t->pdu_len);
/* t->comm is a string (endian neutral) */
}
#endif
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