fix assert failed when timeout during call rate_ddir.

Adding DDIR_TIMEOUT in enum fio_ddir, and rate_ddir returns it when fio timeouts.
set_io_u_file will directly break out of the loop, and fill_io_u won't be called,
which causes assert to fail in rate_ddir, because td->rwmix_ddir is DDIR_INVAL.

Signed-off-by: QingSong Zhu zhuqingsong.0909@bytedance.com

io_ddir.h

@@ -11,6 +11,7 @@ enum fio_ddir {
  DDIR_WAIT,
  DDIR_LAST,
  DDIR_INVAL = -1,
+ DDIR_TIMEOUT = -2,
 
  DDIR_RWDIR_CNT = 3,
  DDIR_RWDIR_SYNC_CNT = 4,

io_u.c

@@ -717,7 +717,7 @@ static enum fio_ddir rate_ddir(struct thread_data *td, enum fio_ddir ddir)
  * check if the usec is capable of taking negative values
  */
  if (now > td->o.timeout) {
- ddir = DDIR_INVAL;
+ ddir = DDIR_TIMEOUT;
  return ddir;
  }
  usec = td->o.timeout - now;
@@ -726,7 +726,7 @@ static enum fio_ddir rate_ddir(struct thread_data *td, enum fio_ddir ddir)
 
  now = utime_since_now(&td->epoch);
  if ((td->o.timeout && (now > td->o.timeout)) || td->terminate)
- ddir = DDIR_INVAL;
+ ddir = DDIR_TIMEOUT;
 
  return ddir;
 }
@@ -951,7 +951,7 @@ static int fill_io_u(struct thread_data *td, struct io_u *io_u)
 
  set_rw_ddir(td, io_u);
 
- if (io_u->ddir == DDIR_INVAL) {
+ if (io_u->ddir == DDIR_INVAL || io_u->ddir == DDIR_TIMEOUT) {
  dprint(FD_IO, "invalid direction received ddir = %d", io_u->ddir);
  return 1;
  }
@@ -1419,6 +1419,10 @@ static long set_io_u_file(struct thread_data *td, struct io_u *io_u)
  put_file_log(td, f);
  td_io_close_file(td, f);
  io_u->file = NULL;
+
+ if (io_u->ddir == DDIR_TIMEOUT)
+ return 1;
+
  if (td->o.file_service_type & __FIO_FSERVICE_NONUNIFORM)
  fio_file_reset(td, f);
  else {

zbd.c

@@ -2171,6 +2171,7 @@ enum io_u_action zbd_adjust_block(struct thread_data *td, struct io_u *io_u)
  case DDIR_WAIT:
  case DDIR_LAST:
  case DDIR_INVAL:
+ case DDIR_TIMEOUT:
  goto accept;
  }