LCOM1920-T02G10

#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 */