GitHub - bidebro/netlink: Linux netlink program, to show how to transfer information between kernel and user space

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Linux netlink program, to show how to transfer information between kernel and user space

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Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
README		README
gpio_interrupt.c		gpio_interrupt.c
hotplug.c		hotplug.c
nl_kernel.c		nl_kernel.c
nl_user.c		nl_user.c

Repository files navigation

hotplug.c
    snl.nl_groups = 1;
    disconnect USB-to-COM device and reconnect it once:
        root@maemo-desktop:/mnt/hgfs/VMware_share/mycode/netlink# ./hotplug
        test errno: Success
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0/tty/ttyUSB0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0/tty/ttyUSB0




    snl.nl_groups = 3;
    disconnect USB-to-COM device and reconnect it once:
        inputtedroot@maemo-desktop:/mnt/hgfs/VMware_share/mycode/netlink# ./hotplug
        test errno: Success
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0/tty/ttyUSB0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0
        remove@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1
        libudev
        libudev
        libudev
        libudev
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0
        add@/devices/pci0000:00/0000:00:11.0/0000:02:00.0/usb2/2-2/2-2.1/2-2.1:1.0/ttyUSB0/tty/ttyUSB0
        libudev
        libudev
        libudev
        libudev

Makefile
    obj-m += nl_kernel.o

make on BB_Ubuntu:
    make ARCH=arm  -C /lib/modules/3.0.4-x3/build M=$(pwd) modules

Run
    sudo insmod nl_kernel.ko
    ./nl_user
    dmesg | tail