minix3/include/minix/btrace.h

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2020-02-21 00:59:27 +05:30
#ifndef _MINIX_BTRACE_H
#define _MINIX_BTRACE_H
/* Control directives. */
enum {
BTCTL_START,
BTCTL_STOP
};
/* Request codes. */
enum {
BTREQ_OPEN,
BTREQ_CLOSE,
BTREQ_READ,
BTREQ_WRITE,
BTREQ_GATHER,
BTREQ_SCATTER,
BTREQ_IOCTL
};
/* Special result codes. */
#define BTRES_INPROGRESS (-997)
/* Block trace entry. */
typedef struct {
u32_t request; /* request code; one of BTR_xxx */
u32_t size; /* request size, ioctl request, or access */
u64_t position; /* starting disk position */
u32_t flags; /* transfer flags */
i32_t result; /* request result; OK, bytes, or error */
u32_t start_time; /* request service start time (us) */
u32_t finish_time; /* request service completion time (us) */
} btrace_entry; /* (32 bytes) */
/* This is the number of btrace_entry structures copied out at once using the
* BIOCTRACEGET ioctl call.
*/
#define BTBUF_SIZE 1024
#endif /* _MINIX_BTRACE_H */