DPDK 22.11.2 kni

一、编译kni

修改 项目根目录下 meson_options.txt, 删除value中的kni 后进行编译

option('disable_libs', type: 'string', value: 'flow_classify,kni', description:
       'Comma-separated list of libraries to explicitly disable. [NOTE: not all libs can be disabled]')

二、编译rte_kni.ko

修改 项目根目录下 meson_options.txt enable_kmods中 value 为 true 后进行编译

option('enable_kmods', type: 'boolean', value: false, description:
       'build kernel modules')

问题：

Skipping BTF generation [my module name] due to unavailabilty of vmlinux

解决：

确保 /sys/kernel/btf 下面有 vmlinux

apt install dwarves
cp /sys/kernel/btf/vmlinux /usr/lib/modules/`uname -r`/build/

结果：

# ninja
[3273/3276] Generating kernel/linux/kni/rte_kni with a custom command
make: Entering directory '/usr/src/linux-headers-5.15.0-125-generic'
  CC [M]  /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/kni_misc.o
  CC [M]  /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/kni_net.o
  LD [M]  /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/rte_kni.o
  MODPOST /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/Module.symvers
  CC [M]  /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/rte_kni.mod.o
  LD [M]  /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/rte_kni.ko
  BTF [M] /home/../dpdk-stable-22.11.2/build/kernel/linux/kni/rte_kni.ko
make: Leaving directory '/usr/src/linux-headers-5.15.0-125-generic'
[3276/3276] Linking target app/test/dpdk-test

安装 rte_kni.ko

# insmod rte_kni.ko kthread_mode=multiple

到这里问题就能解决了

参考：https://askubuntu.com/questions/1348250/skipping-btf-generation-xxx-due-to-unavailability-of-vmlinux-on-ubuntu-21-04