um/drivers/virtio_uml.c

84 	int rc;
87 		rc = os_sendmsg_fds(fd, buf, len, fds, fds_num);
88 		if (rc > 0) {
89 			buf += rc;
90 			len -= rc;
94 	} while (len && (rc >= 0 || rc == -EINTR));
96 	if (rc < 0)
97 		return rc;
103 	int rc;
109 		rc = os_read_file(fd, buf, len);
110 		if (rc > 0) {
111 			buf += rc;
112 			len -= rc;
114 	} while (len && (rc > 0 || rc == -EINTR || (!abortable && rc == -EAGAIN)));
116 	if (rc < 0)
117 		return rc;
118 	if (rc == 0)
133 	int rc;
150 	rc = vhost_user_recv_header(fd, msg);
152 	if (rc)
153 		return rc;
161 				   int rc)
165 	if (rc != -ECONNRESET)
180 	int rc = vhost_user_recv(vu_dev, vu_dev->sock, msg,
183 	if (rc) {
184 		vhost_user_check_reset(vu_dev, rc);
185 		return rc;
198 	int rc = vhost_user_recv_resp(vu_dev, &msg,
201 	if (rc)
202 		return rc;
213 	int rc = vhost_user_recv(vu_dev, vu_dev->req_fd, msg,
216 	if (rc)
217 		return rc;
233 	int rc;
251 	rc = full_sendmsg_fds(vu_dev->sock, msg, size, fds, num_fds);
252 	if (rc < 0)
258 		rc = vhost_user_recv_u64(vu_dev, &status);
259 		if (rc)
264 			rc = -EIO;
271 	return rc;
314 	int rc = vhost_user_send_no_payload(vu_dev, true,
317 	if (rc)
318 		return rc;
331 	int rc = vhost_user_send_no_payload(vu_dev, true,
334 	if (rc)
335 		return rc;
353 	int rc;
360 	rc = full_sendmsg_fds(vu_dev->req_fd, &reply, size, NULL, 0);
362 	if (rc)
365 		       rc, size);
377 	int rc;
381 		rc = vhost_user_recv_req(vu_dev, &msg.msg,
384 		if (rc)
418 	vu_dev->recv_rc = (rc == -EAGAIN) ? 0 : rc;
456 	int rc, req_fds[2];
459 	rc = os_pipe(req_fds, true, true);
460 	if (rc < 0)
461 		return rc;
464 	rc = um_request_irq_tt(UM_IRQ_ALLOC, vu_dev->req_fd, IRQ_READ,
468 	if (rc < 0)
471 	vu_dev->irq = rc;
473 	rc = vhost_user_send_no_payload_fd(vu_dev, VHOST_USER_SET_SLAVE_REQ_FD,
475 	if (rc)
487 	return rc;
492 	int rc = vhost_user_set_owner(vu_dev);
494 	if (rc)
495 		return rc;
496 	rc = vhost_user_get_features(vu_dev, &vu_dev->features);
497 	if (rc)
498 		return rc;
501 		rc = vhost_user_get_protocol_features(vu_dev,
503 		if (rc)
504 			return rc;
506 		rc = vhost_user_set_protocol_features(vu_dev,
508 		if (rc)
509 			return rc;
514 		rc = vhost_user_init_slave_req(vu_dev);
515 		if (rc)
516 			return rc;
529 	int rc;
543 	rc = vhost_user_send(vu_dev, true, msg, NULL, 0);
544 	if (rc) {
546 		       rc);
550 	rc = vhost_user_recv_resp(vu_dev, msg, msg_size);
551 	if (rc) {
554 		       rc);
560 		rc = -EPROTO;
579 	int rc;
594 	rc = vhost_user_send(vu_dev, false, msg, NULL, 0);
595 	if (rc)
597 		       rc);
606 	int rc = phys_mapping(addr, &mem_offset);
608 	if (WARN(rc < 0, "phys_mapping of 0x%llx returned %d\n", addr, rc))
610 	*fd_out = rc;
617 	rc = phys_mapping(addr + size - 1, &mem_offset);
618 	if (WARN(rc != *fd_out, "phys_mapping of 0x%llx failed: %d != %d\n",
619 		 addr + size - 1, rc, *fd_out))
633 	int rc;
670 	rc = vhost_user_init_mem_region(reserved, physmem_size - reserved,
674 	if (rc < 0)
675 		return rc;
678 		rc = vhost_user_init_mem_region(__pa(end_iomem), highmem,
680 		if (rc < 0)
681 			return rc;
781 	int rc;
798 		rc = os_write_file(info->kick_fd, &n, sizeof(n));
799 	} while (rc == -EINTR);
800 	return !WARN(rc != sizeof(n), "write returned %d\n", rc);
808 	int rc;
812 		rc = os_read_file(info->call_fd, &n, sizeof(n));
813 		if (rc == sizeof(n))
815 	} while (rc == sizeof(n) || rc == -EINTR);
816 	WARN(rc != -EAGAIN, "read returned %d\n", rc);
900 	int rc;
912 	rc = os_pipe(call_fds, true, true);
913 	if (rc < 0)
914 		return rc;
917 	rc = um_request_irq(vu_dev->irq, info->call_fd, IRQ_READ,
919 	if (rc < 0)
922 	rc = vhost_user_set_vring_call(vu_dev, vq->index, call_fds[1]);
923 	if (rc)
936 	return rc;
948 	int rc;
952 		rc = -ENOMEM;
961 		rc = -ENOMEM;
972 		rc = os_eventfd(0, 0);
973 		if (rc < 0)
975 		info->kick_fd = rc;
978 	rc = vu_setup_vq_call_fd(vu_dev, vq);
979 	if (rc)
982 	rc = vhost_user_set_vring_num(vu_dev, index, num);
983 	if (rc)
986 	rc = vhost_user_set_vring_base(vu_dev, index, 0);
987 	if (rc)
990 	rc = vhost_user_set_vring_addr(vu_dev, index,
995 	if (rc)
1013 	return ERR_PTR(rc);
1022 	int i, queue_idx = 0, rc;
1029 	rc = vhost_user_set_mem_table(vu_dev);
1030 	if (rc)
1031 		return rc;
1042 			rc = PTR_ERR(vqs[i]);
1051 			rc = vhost_user_set_vring_kick(vu_dev, vq->index,
1053 			if (rc)
1057 		rc = vhost_user_set_vring_enable(vu_dev, vq->index, true);
1058 		if (rc)
1066 	return rc;
1191 	int rc;
1215 		rc = os_connect_socket(pdata->socket_path);
1216 	} while (rc == -EINTR);
1217 	if (rc < 0)
1219 	vu_dev->sock = rc;
1223 	rc = vhost_user_init(vu_dev);
1224 	if (rc)
1231 	rc = register_virtio_device(&vu_dev->vdev);
1232 	if (rc)
1235 	return rc;
1241 	return rc;