cm_read
cm_read(selstate, conn->fd);
cm_read(selstate, conn->fd);
cm_read(selstate, conn->fd);
cm_read(selstate, conn->fd);
cm_read(selstate, state->fd);
cuse_read_t *cm_read;
if (cdev->mtod->cm_read != NULL) {
error = (cdev->mtod->cm_read) (cdev, (int)info.fflags,
.cm_read = vclient_read,
.cm_read = vclient_read,