Re: [PATCH v2] tools: usb: usbip: Add simple script to show how to setup vUDC

[Shuah Khan]

Hi Krzysztof,

Thanks for getting to this so quickly. Couple of comments below:

On 12/09/2016 10:15 AM, Krzysztof Opasiak wrote:
> Add some simple script which creates a USB gadget using ConfigFS
> and then exports it using vUDC.
> 
> This may be useful for people who just started playing with
> USB/IP and vUDC as it shows exact steps how to setup all stuff.
> 
> Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
> ---
> Changes since v1:
> - Fix terminology mistake (server instead of client)
> ---
>  tools/usb/usbip/vudc/vudc_server_example.sh | 100 ++++++++++++++++++++++++++++
>  1 file changed, 100 insertions(+)
>  create mode 100755 tools/usb/usbip/vudc/vudc_server_example.sh

Looks like it also includes client side, would it make sense to not name is server
and call it vudc_export_example.sh?

> 
> diff --git a/tools/usb/usbip/vudc/vudc_server_example.sh b/tools/usb/usbip/vudc/vudc_server_example.sh
> new file mode 100755
> index 000000000000..9bd1fd58d592
> --- /dev/null
> +++ b/tools/usb/usbip/vudc/vudc_server_example.sh
> @@ -0,0 +1,100 @@
> +#!/bin/bash
> +
> +################################################################################
> +# This is free and unencumbered software released into the public domain.
> +#
> +# Anyone is free to copy, modify, publish, use, compile, sell, or
> +# distribute this software, either in source code form or as a compiled
> +# binary, for any purpose, commercial or non-commercial, and by any
> +# means.
> +#
> +# In jurisdictions that recognize copyright laws, the author or authors
> +# of this software dedicate any and all copyright interest in the
> +# software to the public domain. We make this dedication for the benefit
> +# of the public at large and to the detriment of our heirs and
> +# successors. We intend this dedication to be an overt act of
> +# relinquishment in perpetuity of all present and future rights to this
> +# software under copyright law.
> +#
> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> +# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
> +# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> +# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> +# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> +# OTHER DEALINGS IN THE SOFTWARE.
> +#
> +# For more information, please refer to <http://unlicense.org/>
> +################################################################################

This is the first file under usbip with a different license. Why did you chose
this over GPL that is what is in all oter source files in this module?

Greg! Do you have any recommendation on this?

> +
> +################################################################################
> +# This is a sample script which shows how to use vUDC with ConfigFS gadgets
> +################################################################################
> +
> +# Stop script on error
> +set -e
> +
> +################################################################################
> +# Create your USB gadget
> +# You may use bare ConfigFS interface (as below)
> +# or libusbgx or gt toool
> +# Instead of ConfigFS gadgets you may use any of legacy gadgets.
> +################################################################################
> +CONFIGFS_MOUNT_POINT="/sys/kernel/config"
> +GADGET_NAME="g1"
> +ID_VENDOR="0x1d6b"
> +ID_PRODUCT="0x0104"
> +
> +cd ${CONFIGFS_MOUNT_POINT}/usb_gadget
> +# Create a new USB gadget
> +mkdir ${GADGET_NAME}
> +cd ${GADGET_NAME}
> +
> +# This gadget contains one function - ACM (serial port over USB)
> +FUNC_DIR="functions/acm.ser0"
> +mkdir ${FUNC_DIR}
> +
> +# Just one configuration
> +mkdir configs/c.1
> +ln -s ${FUNC_DIR} configs/c.1
> +
> +# Set our gadget identity
> +echo ${ID_VENDOR} > idVendor
> +echo ${ID_PRODUCT} > idProduct
> +
> +################################################################################
> +# Load vudc-module if vudc is not available
> +# You may change value of num param to get more than one vUDC instance
> +################################################################################
> +[[ -d /sys/class/udc/usbip-vudc.0 ]] || modprobe usbip-vudc num=1
> +
> +################################################################################
> +# Bind gadget to our vUDC
> +# By default we bind to first one but you may change this if you would like
> +# to use more than one instance
> +################################################################################
> +echo "usbip-vudc.0" > UDC
> +
> +################################################################################
> +# Let's now run our usbip daemon in a USB device mode
> +################################################################################
> +usbipd --device &
> +
> +################################################################################
> +# Now your USB gadget is available using USB/IP protocol.
> +# To check this you may try to list available devices:
> +#
> +# $ usbip list -r $SERVER_IP
> +# Exportable USB devices
> +# ======================
> +# usbipd: info: request 0x8005(6): complete
> +#  - 127.0.0.1
> +# usbip-vudc.0: Linux Foundation : unknown product (1d6b:0104)
> +#            : /sys/devices/platform/usbip-vudc.0
> +#            : (Defined at Interface level) (00/00/00)
> +#
> +# To attach this device to your client you may use:
> +#

Are you missing
modprobe usbip-vhci

here.

Also 
> +# $ usbip attach -r $SERVER_IP -d usbip-vudc.0
> +#
> +################################################################################
>