On 12/26/2016 12:08 AM, Nobuo Iwata wrote:
> Implementation of new disconnect operation. This is linked as a part of
> usbip command. With this patch, usbip command has following operations.
>
> bind
> unbind
> list (local/remote)
> attach
> detach
> port
> connect ... previous patch
> disconnect ... this patch
>
> In device side node, this sends an un-export request, receives an
> un-export response and unbind corresponding device internally. The
> definition of the request and response are defined in original code:
> tools/usb/usbip/usbip_network.h but was not used. It's corresponding to
> NEW-4 in following diagram.
>
> To find disconnecting device, requesting host and requested
> bus-id-in-requester identifies the target. So it cannot to disconnect a
> device from other host than a host which connected the device.
Please see review comments on patch 3/10 - all of those apply for this
patch.
>
> EXISTING) - invites devices from application(vhci)-side
> +------+ +------------------+
> device--+ STUB | | application/VHCI |
> +------+ +------------------+
> (server) (client)
> 1) # usbipd ... start daemon
> = = =
> 2) # usbip list --local
> 3) # usbip bind
> <--- list bound devices --- 4) # usbip list --remote
> <--- import a device ------ 5) # usbip attach
> = = =
> X disconnected 6) # usbip detach
> 7) usbip unbind
>
> NEW) - dedicates devices from device(stub)-side
> +------+ +------------------+
> device--+ STUB | | application/VHCI |
> +------+ +------------------+
> (client) (server)
> 1) # usbipa ... start daemon
> = = =
> 2) # usbip list --local
> 3) # usbip connect --- export a device ------>
> = = =
> 4) # usbip disconnect --- un-export a device --->
>
> Bind and unbind are done in connect and disconnect internally.
>
> Signed-off-by: Nobuo Iwata <nobuo.iwata@xxxxxxxxxxxxxxx>
> ---
> tools/usb/usbip/src/Makefile.am | 2 +-
> tools/usb/usbip/src/usbip.c | 6 +
> tools/usb/usbip/src/usbip.h | 2 +
> tools/usb/usbip/src/usbip_disconnect.c | 200 +++++++++++++++++++++++++
> 4 files changed, 209 insertions(+), 1 deletion(-)
>
> diff --git a/tools/usb/usbip/src/Makefile.am b/tools/usb/usbip/src/Makefile.am
> index 0947476..42760c3 100644
> --- a/tools/usb/usbip/src/Makefile.am
> +++ b/tools/usb/usbip/src/Makefile.am
> @@ -7,6 +7,6 @@ sbin_PROGRAMS := usbip usbipd
> usbip_SOURCES := usbip.h utils.h usbip.c utils.c usbip_network.c \
> usbip_attach.c usbip_detach.c usbip_list.c \
> usbip_bind.c usbip_unbind.c usbip_port.c \
> - usbip_connect.c
> + usbip_connect.c usbip_disconnect.c
>
> usbipd_SOURCES := usbip_network.h usbipd.c usbip_network.c
> diff --git a/tools/usb/usbip/src/usbip.c b/tools/usb/usbip/src/usbip.c
> index ad2a259..ead88a2 100644
> --- a/tools/usb/usbip/src/usbip.c
> +++ b/tools/usb/usbip/src/usbip.c
> @@ -83,6 +83,12 @@ static const struct command cmds[] = {
> .usage = usbip_connect_usage
> },
> {
> + .name = "disconnect",
> + .fn = usbip_disconnect,
> + .help = "Disconnect a USB device from a remote computer",
> + .usage = usbip_disconnect_usage
> + },
> + {
> .name = "list",
> .fn = usbip_list,
> .help = "List exportable or local USB devices",
> diff --git a/tools/usb/usbip/src/usbip.h b/tools/usb/usbip/src/usbip.h
> index 3c22c27..b6537ef 100644
> --- a/tools/usb/usbip/src/usbip.h
> +++ b/tools/usb/usbip/src/usbip.h
> @@ -32,6 +32,7 @@ int usbip_bind(int argc, char *argv[]);
> int usbip_unbind(int argc, char *argv[]);
> int usbip_port_show(int argc, char *argv[]);
> int usbip_connect(int argc, char *argv[]);
> +int usbip_disconnect(int argc, char *argv[]);
>
> void usbip_attach_usage(void);
> void usbip_detach_usage(void);
> @@ -39,6 +40,7 @@ void usbip_list_usage(void);
> void usbip_bind_usage(void);
> void usbip_unbind_usage(void);
> void usbip_connect_usage(void);
> +void usbip_disconnect_usage(void);
>
> int usbip_bind_device(char *busid);
> int usbip_unbind_device(char *busid);
> diff --git a/tools/usb/usbip/src/usbip_disconnect.c b/tools/usb/usbip/src/usbip_disconnect.c
> new file mode 100644
> index 0000000..4ee7feb
> --- /dev/null
> +++ b/tools/usb/usbip/src/usbip_disconnect.c
> @@ -0,0 +1,200 @@
> +/*
> + * Copyright (C) 2011 matt mooney <mfm@xxxxxxxxxxxxx>
> + * 2005-2007 Takahiro Hirofuchi
> + * Copyright (C) 2015-2016 Nobuo Iwata <nobuo.iwata@xxxxxxxxxxxxxxx>
> + *
> + * This program is free software: you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation, either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program. If not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include <sys/stat.h>
> +
> +#include <limits.h>
> +#include <stdint.h>
> +#include <stdio.h>
> +#include <string.h>
> +
> +#include <getopt.h>
> +#include <unistd.h>
> +
> +#include "usbip_host_driver.h"
> +#include "usbip_host_common.h"
> +#include "usbip_device_driver.h"
> +#include "usbip_common.h"
> +#include "usbip_network.h"
> +#include "usbip.h"
> +
> +static struct usbip_host_driver *driver = &host_driver;
> +
> +static const char usbip_disconnect_usage_string[] =
> + "usbip disconnect <args>\n"
> + " -r, --remote=<host> Address of a remote computer\n"
> + " -b, --busid=<busid> Bus ID of a device to be disconnected\n"
> + " -d, --device Run with an alternate driver, e.g. vUDC\n";
> +
> +void usbip_disconnect_usage(void)
> +{
> + printf("usage: %s", usbip_disconnect_usage_string);
> +}
> +
> +static int send_unexport_device(int sockfd, struct usbip_usb_device *udev)
> +{
> + int rc;
> + struct op_unexport_request request;
> + uint16_t code = OP_REP_UNEXPORT;
> +
> + /* send a request */
> + rc = usbip_net_send_op_common(sockfd, OP_REQ_UNEXPORT, 0);
> + if (rc < 0) {
> + err("send op_common");
> + return -1;
> + }
> +
> + memset(&request, 0, sizeof(request));
> + memcpy(&request.udev, udev, sizeof(request.udev));
> +
> + PACK_OP_UNEXPORT_REQUEST(0, &request);
> +
> + rc = usbip_net_send(sockfd, (void *) &request, sizeof(request));
> + if (rc < 0) {
> + err("send op_export_request");
> + return -1;
> + }
> +
> + /* receive a reply */
> + rc = usbip_net_recv_op_common(sockfd, &code);
> + if (rc < 0) {
> + err("recv op_common");
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int unexport_device(char *busid, int sockfd)
> +{
> + int rc;
> + struct usbip_exported_device *edev;
> +
> + rc = usbip_driver_open(driver);
> + if (rc < 0) {
> + err("open driver");
> + goto err_out;
> + }
> +
> + rc = usbip_refresh_device_list(driver);
> + if (rc < 0) {
> + err("could not refresh device list");
> + goto err_driver_close;
> + }
> +
> + edev = usbip_get_device(driver, busid);
> + if (edev == NULL) {
> + err("find device");
> + goto err_driver_close;
> + }
> +
> + rc = send_unexport_device(sockfd, &edev->udev);
> + if (rc < 0) {
> + err("send unexport");
> + goto err_driver_close;
> + }
> +
> + usbip_driver_close(driver);
> +
> + return 0;
> +
> +err_driver_close:
> + usbip_driver_close(driver);
> +err_out:
> + return -1;
> +}
> +
> +static int disconnect_device(char *host, char *busid, int unbind)
> +{
> + int sockfd;
> + int rc;
> +
> + sockfd = usbip_net_tcp_connect(host, usbip_port_string);
> + if (sockfd < 0) {
> + err("tcp connect");
> + return -1;
> + }
> +
> + rc = unexport_device(busid, sockfd);
> + if (rc < 0) {
> + err("unexport");
> + close(sockfd);
> + return -1;
> + }
> +
> + close(sockfd);
> +
> + if (unbind) {
> + rc = usbip_unbind_device(busid);
> + if (rc) {
> + err("unbind");
> + return -1;
> + }
> + }
> +
> + return 0;
> +}
> +
> +int usbip_disconnect(int argc, char *argv[])
> +{
> + static const struct option opts[] = {
> + { "remote", required_argument, NULL, 'r' },
> + { "busid", required_argument, NULL, 'b' },
> + { "device", no_argument, NULL, 'd' },
> + { NULL, 0, NULL, 0 }
> + };
> + char *host = NULL;
> + char *busid = NULL;
> + int opt;
> + int unbind = 1;
> + int ret = -1;
> +
> + for (;;) {
> + opt = getopt_long(argc, argv, "r:b:d", opts, NULL);
> +
> + if (opt == -1)
> + break;
> +
> + switch (opt) {
> + case 'r':
> + host = optarg;
> + break;
> + case 'b':
> + busid = optarg;
> + break;
> + case 'd':
> + driver = &device_driver;
> + unbind = 0;
> + break;
> + default:
> + goto err_out;
> + }
> + }
> +
> + if (!host || !busid)
> + goto err_out;
> +
> + ret = disconnect_device(host, busid, unbind);
> + goto out;
> +
> +err_out:
> + usbip_disconnect_usage();
> +out:
> + return ret;
> +}
>
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