Function rpmsgfs_client_ioctl

fs/rpmsgfs/rpmsgfs_client.c:594–643

}

int rpmsgfs_client_ioctl(FAR void *handle, int fd,
                         int request, unsigned long arg)
{
  ssize_t arglen = rpmsgfs_ioctl_arglen(request);
  FAR struct rpmsgfs_s *priv = handle;
  FAR struct rpmsgfs_ioctl_s *msg;
  uint32_t space;
  size_t len;
  int ret;

  if (arglen < 0)
    {
      return arglen;
    }

  len = sizeof(*msg) + arglen;

  while (1)
    {
      msg = rpmsgfs_get_tx_payload_buffer(priv, &space);
      if (msg == NULL)
        {
          return -ENOMEM;
        }

      DEBUGASSERT(len <= space);

      msg->fd      = fd;
      msg->request = request == FIOC_SETLKW ? FIOC_SETLK : request;
      msg->arg     = arg;
      msg->arglen  = arglen;

      if (arglen > 0)
        {
          memcpy(msg->buf, (FAR void *)(uintptr_t)arg, arglen);
        }

      ret = rpmsgfs_send_recv(handle, RPMSGFS_IOCTL, false,
                              (FAR struct rpmsgfs_header_s *)msg, len,
                              arglen > 0 ? (FAR void *)arg : NULL);
      if (request != FIOC_SETLKW || ret != -EAGAIN)
        {
          break;
        }

      usleep(20000);
    }

  return ret;
}

void rpmsgfs_client_sync(FAR void *handle, int fd)
{