F-Stack's DPDK cannot be compiled in CentOS 7

[comfyneet]

Try to build F-Stack's DPDK 17.11.2 LTS in CentOS 7.5.

$ uname -a
Linux localhost.localdomain 3.10.0-862.3.3.el7.x86_64 #1 SMP Fri Jun 15 04:15:27 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

$ make config T=x86_64-native-linuxapp-gcc

$ make

[...]

  CC [M]  /home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.o
/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.c:704:2: error: unknown field ‘ndo_change_mtu’ specified in initializer
  .ndo_change_mtu = kni_net_change_mtu,
  ^
/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.c:704:2: warning: missing braces around initializer [-Wmissing-braces]
/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.c:704:2: warning: (near initialization for ‘kni_net_netdev_ops.<anonymous>’) [-Wmissing-braces]
/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.c:704:2: warning: initialization from incompatible pointer type [enabled by default]
/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.c:704:2: warning: (near initialization for ‘kni_net_netdev_ops.<anonymous>.ndo_select_queue’) [enabled by default]
make[8]: *** [/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni/kni_net.o] Error 1
make[7]: *** [_module_/home/phucnm/workspace/f-stack/dpdk/build/build/lib/librte_eal/linuxapp/kni] Error 2
make[6]: *** [sub-make] Error 2
make[5]: *** [rte_kni.ko] Error 2
make[4]: *** [kni] Error 2
make[3]: *** [linuxapp] Error 2
make[2]: *** [librte_eal] Error 2
make[1]: *** [lib] Error 2
make: *** [all] Error 2

Upgrading to DPDK 18.05 fixes this issue. However, I still want to use the current F-Stack sdk, so I want to downgrade my CentOS's kernel. I want to ask which kernel was used in the Quick Start and AWS guides?

[whl739]

Actually, we tested kernel 3.10 ~ 4.15, but we hadn't test all the distributions, and Centos 7.2, Redhat7.3, Ubuntu 14.04 ~ 18.04 worked fine.
This error is caused by kni compiling, you can just disable kni.

[yingfeng]

@whl739 I've met the same error. How to disable kni manually?
Additionally, it seems kni has been disabled in this commit but the same error still appears

[whl739]

Edit dpdk/x86_64-native-linuxapp-gcc/.config, change the value of KNI related section from 'y' to 'n'.

[yingfeng]

thank you, it works now

[Smiledarshu]

Hi @whl739
i can't able to find .config file inside dpdk/x86_64-native-linuxapp-gcc/ after compiling.

Any help would be appreciated.
Thanks

[gitusermavux]

There is another solution, modify "dpdk/config/common_linuxapp". Search for KNI and change all "YES" to "NO".

[wyao51]

用find / -name netdevice.h 查找内核中的头文件，找到struct net_device_ops 中的 ndo_change_mtu，

会看到ndo_change_mtu被替换成对应版本的ndo_change_mtu_rhXX,比如 ndo_change_mtu_rh75 将 /kni_net.c:704:2 中 ndo_change_mtu 用 ndo_change_mtu_rh75 替换试试？

[wyao51]

[root@localhost dpdk-17.11]# vim ./lib/librte_eal/linuxapp/kni/kni_net.c
[root@localhost dpdk-17.11]# vim /usr/src/kernels/3.10.0-57.10.1.el7.x86_64/include/linux/netdevice.h
两边不一样，kni_net.c改成netdevice.h中定义可以解决

[Pingmin]

@wyao511 ：

用find / -name netdevice.h 查找内核中的头文件，找到struct net_device_ops 中的 ndo_change_mtu，

会看到ndo_change_mtu被替换成对应版本的ndo_change_mtu_rhXX,比如 ndo_change_mtu_rh75 将 /kni_net.c:704:2 中 ndo_change_mtu 用 ndo_change_mtu_rh75 替换试试？

[root@localhost dpdk-17.11]# vim ./lib/librte_eal/linuxapp/kni/kni_net.c
[root@localhost dpdk-17.11]# vim /usr/src/kernels/3.10.0-57.10.1.el7.x86_64/include/linux/netdevice.h
两边不一样，kni_net.c改成netdevice.h中定义可以解决

今天（20210412）在 CentOS 7.9.2009 上编译一个 USB 转 RJ45 网卡设备 的 驱动 （src tar ball）时，也遇到了这个 unknown field ‘ndo_change_mtu’ 错误：

[pingmin@f*-node2 AX88179_178A_Linux_Driver_v1.20.0_source]$ make
make -C /lib/modules/3.10.0-1160.15.2.el7.x86_64/build M=/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source modules
make[1]: Entering directory `/usr/src/kernels/3.10.0-1160.15.2.el7.x86_64'
  CC [M]  /data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.o
/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.c:1017:2: error: unknown field ‘ndo_change_mtu’ specified in initializer
  .ndo_change_mtu  = ax88179_change_mtu,
  ^
/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.c:1017:2: warning: missing braces around initializer [-Wmissing-braces]
/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.c:1017:2: warning: (near initialization for ‘ax88179_netdev_ops.<anonymous>’) [-Wmissing-braces]
/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.c:1017:2: warning: initialization from incompatible pointer type [enabled by default]
/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.c:1017:2: warning: (near initialization for ‘ax88179_netdev_ops.<anonymous>.ndo_get_stats64’) [enabled by default]
make[2]: *** [/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source/ax88179_178a.o] Error 1
make[1]: *** [_module_/data/software/ugreen-and-asix/AX88179_178A_Linux_Driver_v1.20.0_source] Error 2
make[1]: Leaving directory `/usr/src/kernels/3.10.0-1160.15.2.el7.x86_64'
make: *** [default] Error 2

然后，按照你说的方法，将 ax88179_178a.c 中的初始化成员名改成了与 /usr/src/kernels/3.10.0-1160.15.2.el7.x86_64/include/linux/netdevice.h 中定义一样的 ndo_change_mtu_rh74，就可以编译了。

20210413 更新：

根据网上一些资料，是因为 RHEL/CentOS 从 7.4 开始，ndo_change_mtu 被改成了 ndo_change_mtu_rh74，故针对 RHEL/CentOS 7.4+，可以添加一个如下 define 宏定义便可（其他保持不变）：

/* ax88179_178a.c */

#if (defined(RHEL_RELEASE_CODE) && \
	(RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(7, 4)))
#define ndo_change_mtu  ndo_change_mtu_rh74
#endif

static const struct net_device_ops ax88179_netdev_ops = {
	...
	.ndo_change_mtu         = ax88179_change_mtu,
	...
};

谢谢！