usb/usbip/stub_rx.c

200  * handler will be called and stub_tx will send a return pdu.
205 				struct usbip_header *pdu)
214 		if (priv->seqnum != pdu->u.cmd_unlink.seqnum)
221 		 * now not going to return the normal result pdu of a
222 		 * submission request, but going to return a result pdu
231 		 * to make the result pdu of the unlink request.
233 		priv->seqnum = pdu->base.seqnum;
244 		 * will return the result pdu of this unlink request
264 			  pdu->u.cmd_unlink.seqnum);
269 	 * CMD_RET pdu. In this case, usb_unlink_urb() is not needed. We only
272 	stub_enqueue_ret_unlink(sdev, pdu->base.seqnum, 0);
279 static int valid_request(struct stub_device *sdev, struct usbip_header *pdu)
284 	if (pdu->base.devid == sdev->devid) {
297 					 struct usbip_header *pdu)
313 	priv->seqnum = pdu->base.seqnum;
327 static int get_pipe(struct stub_device *sdev, struct usbip_header *pdu)
332 	int epnum = pdu->base.ep;
333 	int dir = pdu->base.direction;
370 		if (pdu->u.cmd_submit.number_of_packets < 0 ||
371 		    pdu->u.cmd_submit.number_of_packets >
375 				pdu->u.cmd_submit.number_of_packets);
456 				 struct usbip_header *pdu)
466 	int pipe = get_pipe(sdev, pdu);
467 	int use_sg = pdu->u.cmd_submit.transfer_flags & USBIP_URB_DMA_MAP_SG;
480 	priv = stub_priv_alloc(sdev, pdu);
484 	buf_len = (unsigned long long)pdu->u.cmd_submit.transfer_buffer_length;
516 				pdu->u.cmd_submit.transfer_flags &=
535 			np = pdu->u.cmd_submit.number_of_packets;
552 		priv->urbs[0]->setup_packet = kmemdup(&pdu->u.cmd_submit.setup,
559 		usbip_pack_pdu(pdu, priv->urbs[0], USBIP_CMD_SUBMIT, 0);
569 			usbip_pack_pdu(pdu, priv->urbs[i], USBIP_CMD_SUBMIT, 0);
577 		/* set other members from the base header of pdu */
601 					pdu->base.seqnum);
604 			usbip_dump_header(pdu);
628 /* recv a pdu */
632 	struct usbip_header pdu;
638 	memset(&pdu, 0, sizeof(pdu));
640 	/* receive a pdu header */
641 	ret = usbip_recv(ud->tcp_socket, &pdu, sizeof(pdu));
642 	if (ret != sizeof(pdu)) {
648 	usbip_header_correct_endian(&pdu, 0);
651 		usbip_dump_header(&pdu);
653 	if (!valid_request(sdev, &pdu)) {
659 	switch (pdu.base.command) {
661 		stub_recv_cmd_unlink(sdev, &pdu);
665 		stub_recv_cmd_submit(sdev, &pdu);
670 		dev_err(dev, "unknown pdu\n");