[SOLVED] Build custom driver for linux

Issue

I am new to building C lib and have mostly worked with python. My goal is to take the source code from https://github.com/torvalds/linux and build a custom driver for USB/IP (https://github.com/torvalds/linux/tree/master/drivers/usb/usbip) module (some modification).

I copied only /tool/usbip/ assuming that USB and USB-IP are already present in the alpine.

I have set up a docker Image:

FROM alpine

COPY . .

RUN apk add build-base autoconf automake libtool eudev-dev libusb-dev

WORKDIR /tool/usbip/

RUN ./autogen.sh
RUN ./configure
RUN make install

I am getting the following error for make install:

Step 7/7 : RUN make install
 ---> Running in 48f53c225a99
Making install in libsrc
make[1]: Entering directory '/tool/usbip/libsrc'
  CC       libusbip_la-names.lo
In file included from names.c:23:
usbip_common.h:18:10: fatal error: linux/usb/ch9.h: No such file or directory
   18 | #include <linux/usb/ch9.h>
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [Makefile:459: libusbip_la-names.lo] Error 1
make[1]: Leaving directory '/tool/usbip/libsrc'
make: *** [Makefile:500: install-recursive] Error 1

This could mean that alpine doesn't have a USB drive. How do I compile and install the driver in that docker?

Another solution can be to build the entire Linux code from the repo, but can I use alpine and add a USB-IP driver there, as I can see that alpine is very lightweight?

I see some Kconfig and Makefile, but I need guidance on building the required driver, as my task also requires modifying drivers/USB/usbip code and building the driver for usbip.

Some blog links or youtube videos on build drivers will also help, but I was not able to find any good resources online.

---

Updated docker file:

FROM alpine:latest

COPY . /linux

RUN apk add build-base autoconf \
    automake libtool eudev-dev \
    linux-headers flex bison gmp-dev \
    mpc1-dev mpfr-dev


WORKDIR /linux

RUN zcat /proc/config.gz > .config
RUN make olddefconfig
RUN make modules_prepare
RUN make M=drivers/usb/usbip modules

WORKDIR /linux/tools/usb/usbip/

RUN ./autogen.sh
RUN ./configure
RUN make install

Solution

• Download kernel sources and go to its root.
• Copy .config for system you want to build for. E.g. if it is your running system and it provides /proc/config.gz then zcat /proc/config.gz > .config
• make olddefconfig
• Ensure CONFIG_USBIP and other modules are enabled as a modules:

$ grep CONFIG_USBIP .config
CONFIG_USBIP_CORE=m
CONFIG_USBIP_VHCI_HCD=m
CONFIG_USBIP_VHCI_HC_PORTS=8
CONFIG_USBIP_VHCI_NR_HCS=1
CONFIG_USBIP_HOST=m
# CONFIG_USBIP_DEBUG is not set

If not, run make nconfig (or make menuconfig), navigate to Device Drivers->USB support->USB/IP support and enable it as a module (<M>); save configuration.

• make modules_prepare
• make M=drivers/usb/usbip modules

Your modules are in drivers/usb/usbip/

Answered By - dimich

Answer Checked By - Gilberto Lyons (WPSolving Admin)