usbip: tools: Start using VUDC backend in usbip tools

Modify userspace tools to allow exporting and connecting to vudc.

This commit is a result of cooperation between Samsung R&D Institute
Poland and Open Operating Systems Student Society at University
of Warsaw (O2S3@UW) consisting of:

   Igor Kotrasinski <ikotrasinsk@gmail.com>
   Karol Kosik <karo9@interia.eu>
   Ewelina Kosmider <3w3lfin@gmail.com>
   Dawid Lazarczyk <lazarczyk.dawid@gmail.com>
   Piotr Szulc <ps347277@students.mimuw.edu.pl>

Tutor and project owner:
   Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Igor Kotrasinski <i.kotrasinsk@samsung.com>
Signed-off-by: Ewelina Kosmider <3w3lfin@gmail.com>
[Various bug fixes and improvements]
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/usb/usbip/src/usbip_attach.c

 /*
  * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
  *               2005-2007 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *               Krzysztof Opasiak <k.opasiak@samsung.com>
  *
  * 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
@@ -36,7 +39,8 @@
 static const char usbip_attach_usage_string[] =
 	"usbip attach <args>\n"
 	"    -r, --remote=<host>      The machine with exported USB devices\n"
-	"    -b, --busid=<busid>    Busid of the device on <host>\n";
+	"    -b, --busid=<busid>    Busid of the device on <host>\n"
+	"    -d, --device=<devid>    Id of the virtual UDC on <host>\n";
 
 void usbip_attach_usage(void)
 {
@@ -203,6 +207,7 @@ int usbip_attach(int argc, char *argv[])
 	static const struct option opts[] = {
 		{ "remote", required_argument, NULL, 'r' },
 		{ "busid",  required_argument, NULL, 'b' },
+		{ "device",  required_argument, NULL, 'd' },
 		{ NULL, 0,  NULL, 0 }
 	};
 	char *host = NULL;
@@ -211,7 +216,7 @@ int usbip_attach(int argc, char *argv[])
 	int ret = -1;
 
 	for (;;) {
-		opt = getopt_long(argc, argv, "r:b:", opts, NULL);
+		opt = getopt_long(argc, argv, "d:r:b:", opts, NULL);
 
 		if (opt == -1)
 			break;
@@ -220,6 +225,7 @@ int usbip_attach(int argc, char *argv[])
 		case 'r':
 			host = optarg;
 			break;
+		case 'd':
 		case 'b':
 			busid = optarg;
 			break;

tools/usb/usbip/src/usbip_list.c

 /*
  * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
  *               2005-2007 Takahiro Hirofuchi
+ * Copyright (C) 2015-2016 Samsung Electronics
+ *               Igor Kotrasinski <i.kotrasinsk@samsung.com>
+ *               Krzysztof Opasiak <k.opasiak@samsung.com>
  *
  * 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
@@ -30,6 +33,10 @@
 #include <netdb.h>
 #include <unistd.h>
 
+#include <dirent.h>
+
+#include <linux/usb/ch9.h>
+
 #include "usbip_common.h"
 #include "usbip_network.h"
 #include "usbip.h"
@@ -205,8 +212,10 @@ static int list_devices(bool parsable)
 		/* Get device information. */
 		idVendor = udev_device_get_sysattr_value(dev, "idVendor");
 		idProduct = udev_device_get_sysattr_value(dev, "idProduct");
-		bConfValue = udev_device_get_sysattr_value(dev, "bConfigurationValue");
-		bNumIntfs = udev_device_get_sysattr_value(dev, "bNumInterfaces");
+		bConfValue = udev_device_get_sysattr_value(dev,
+				"bConfigurationValue");
+		bNumIntfs = udev_device_get_sysattr_value(dev,
+				"bNumInterfaces");
 		busid = udev_device_get_sysname(dev);
 		if (!idVendor || !idProduct || !bConfValue || !bNumIntfs) {
 			err("problem getting device attributes: %s",
@@ -237,12 +246,90 @@ static int list_devices(bool parsable)
 	return ret;
 }
 
+static int list_gadget_devices(bool parsable)
+{
+	int ret = -1;
+	struct udev *udev;
+	struct udev_enumerate *enumerate;
+	struct udev_list_entry *devices, *dev_list_entry;
+	struct udev_device *dev;
+	const char *path;
+	const char *driver;
+
+	const struct usb_device_descriptor *d_desc;
+	const char *descriptors;
+	char product_name[128];
+
+	uint16_t idVendor;
+	char idVendor_buf[8];
+	uint16_t idProduct;
+	char idProduct_buf[8];
+	const char *busid;
+
+	udev = udev_new();
+	enumerate = udev_enumerate_new(udev);
+
+	udev_enumerate_add_match_subsystem(enumerate, "platform");
+
+	udev_enumerate_scan_devices(enumerate);
+	devices = udev_enumerate_get_list_entry(enumerate);
+
+	udev_list_entry_foreach(dev_list_entry, devices) {
+		path = udev_list_entry_get_name(dev_list_entry);
+		dev = udev_device_new_from_syspath(udev, path);
+
+		driver = udev_device_get_driver(dev);
+		/* We only have mechanism to enumerate gadgets bound to vudc */
+		if (driver == NULL || strcmp(driver, USBIP_DEVICE_DRV_NAME))
+			continue;
+
+		/* Get device information. */
+		descriptors = udev_device_get_sysattr_value(dev,
+				VUDC_DEVICE_DESCR_FILE);
+
+		if (!descriptors) {
+			err("problem getting device attributes: %s",
+			    strerror(errno));
+			goto err_out;
+		}
+
+		d_desc = (const struct usb_device_descriptor *) descriptors;
+
+		idVendor = le16toh(d_desc->idVendor);
+		sprintf(idVendor_buf, "0x%4x", idVendor);
+		idProduct = le16toh(d_desc->idProduct);
+		sprintf(idProduct_buf, "0x%4x", idVendor);
+		busid = udev_device_get_sysname(dev);
+
+		/* Get product name. */
+		usbip_names_get_product(product_name, sizeof(product_name),
+					le16toh(idVendor),
+					le16toh(idProduct));
+
+		/* Print information. */
+		print_device(busid, idVendor_buf, idProduct_buf, parsable);
+		print_product_name(product_name, parsable);
+
+		printf("\n");
+
+		udev_device_unref(dev);
+	}
+	ret = 0;
+
+err_out:
+	udev_enumerate_unref(enumerate);
+	udev_unref(udev);
+
+	return ret;
+}
+
 int usbip_list(int argc, char *argv[])
 {
 	static const struct option opts[] = {
 		{ "parsable", no_argument,       NULL, 'p' },
 		{ "remote",   required_argument, NULL, 'r' },
 		{ "local",    no_argument,       NULL, 'l' },
+		{ "device",    no_argument,       NULL, 'd' },
 		{ NULL,       0,                 NULL,  0  }
 	};
 
@@ -254,7 +341,7 @@ int usbip_list(int argc, char *argv[])
 		err("failed to open %s", USBIDS_FILE);
 
 	for (;;) {
-		opt = getopt_long(argc, argv, "pr:l", opts, NULL);
+		opt = getopt_long(argc, argv, "pr:ld", opts, NULL);
 
 		if (opt == -1)
 			break;
@@ -269,6 +356,9 @@ int usbip_list(int argc, char *argv[])
 		case 'l':
 			ret = list_devices(parsable);
 			goto out;
+		case 'd':
+			ret = list_gadget_devices(parsable);
+			goto out;
 		default:
 			goto err_out;
 		}

tools/usb/usbip/src/usbipd.c

@@ -45,6 +45,7 @@
 
 #include "usbip_host_driver.h"
 #include "usbip_host_common.h"
+#include "usbip_device_driver.h"
 #include "usbip_common.h"
 #include "usbip_network.h"
 #include "list.h"
@@ -68,6 +69,11 @@ static const char usbipd_help_string[] =
 	"	-6, --ipv6\n"
 	"		Bind to IPv6. Default is both.\n"
 	"\n"
+	"	-e, --device\n"
+	"		Run in device mode.\n"
+	"		Rather than drive an attached device, create\n"
+	"		a virtual UDC to bind gadgets to.\n"
+	"\n"
 	"	-D, --daemon\n"
 	"		Run as a daemon process.\n"
 	"\n"
@@ -590,6 +596,7 @@ int main(int argc, char *argv[])
 		{ "daemon",   no_argument,       NULL, 'D' },
 		{ "daemon",   no_argument,       NULL, 'D' },
 		{ "debug",    no_argument,       NULL, 'd' },
+		{ "device",   no_argument,       NULL, 'e' },
 		{ "pid",      optional_argument, NULL, 'P' },
 		{ "tcp-port", required_argument, NULL, 't' },
 		{ "help",     no_argument,       NULL, 'h' },
@@ -618,7 +625,7 @@ int main(int argc, char *argv[])
 	cmd = cmd_standalone_mode;
 	driver = &host_driver;
 	for (;;) {
-		opt = getopt_long(argc, argv, "46DdP::t:hv", longopts, NULL);
+		opt = getopt_long(argc, argv, "46DdeP::t:hv", longopts, NULL);
 
 		if (opt == -1)
 			break;
@@ -648,6 +655,9 @@ int main(int argc, char *argv[])
 		case 'v':
 			cmd = cmd_version;
 			break;
+		case 'e':
+			driver = &device_driver;
+			break;
 		case '?':
 			usbipd_help();
 		default: