* ``VHOST_USER_SET_INFLIGHT_FD`` (if ``VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD``)
* ``VHOST_USER_SET_DEVICE_STATE_FD``
-When sending file descriptors in ancilliary data, *front-end* should
-associate the ancilliary data with a ``sendmsg`` operation (or
+When sending file descriptors in ancillary data, *front-end* should
+associate the ancillary data with a ``sendmsg`` operation (or
equivalent) that sends bytes starting with the first byte of the
message header. *back-end* can therefore expect that file descriptors
will only be received in the first ``recvmsg`` operation for a message