Ubuntu 22.04 编译 DPDK 19.11 igb_uio 和 kni 报错解决办法

由于 Ubuntu22.04 内核版本和gcc版本比较高，在编译dpdk时会报错。
我使用的编译命令是：

make install T=x86_64-native-linuxapp-gcc

主要有以下几个错误：

1.error: this statement may fall through

== Build kernel/linux/igb_uioCC [M]  /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.o
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c: In function ‘igbuio_pci_enable_interrupts’:
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:230:20: error: this statement may fall through [-Werror=implicit-fallthrough=]230 |                 if (pci_alloc_irq_vectors(udev->pdev, 1, 1, PCI_IRQ_MSIX) == 1) {|                    ^
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:240:9: note: here240 |         case RTE_INTR_MODE_MSI:|         ^~~~
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:250:20: error: this statement may fall through [-Werror=implicit-fallthrough=]250 |                 if (pci_alloc_irq_vectors(udev->pdev, 1, 1, PCI_IRQ_MSI) == 1) {|                    ^
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:259:9: note: here259 |         case RTE_INTR_MODE_LEGACY:|         ^~~~
In file included from ./include/linux/device.h:15,from /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:8:
./include/linux/dev_printk.h:148:31: error: this statement may fall through [-Werror=implicit-fallthrough=]148 |         dev_printk_index_wrap(_dev_notice, KERN_NOTICE, dev, dev_fmt(fmt), ##__VA_ARGS__)|                               ^
./include/linux/dev_printk.h:110:17: note: in definition of macro ‘dev_printk_index_wrap’110 |                 _p_func(dev, fmt, ##__VA_ARGS__);                       \|                 ^~~~~~~
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:267:17: note: in expansion of macro ‘dev_notice’267 |                 dev_notice(&udev->pdev->dev, "PCI INTX mask not supported\n");|                 ^~~~~~~~~~
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/igb_uio.c:269:9: note: here269 |         case RTE_INTR_MODE_NONE:|         ^~~~
cc1: all warnings being treated as errors

解决办法：

修改 x86_64-native-linuxapp-gcc/build/kernel/linux/igb_uio/Makefile 文件，去掉“MODULE_CFLAGS += -Winline -Wall -Werror” -行的 -Werror 编译选项。

2. error: passing argument 1 of ‘get_user_pages_remote’ from incompatible pointer type

== Build kernel/linux/kniCC [M]  /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.o
In file included from /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.c:22:
/root/dpdk-19.11/kernel/linux/kni/kni_dev.h: In function ‘iova_to_phys’:
/root/dpdk-19.11/kernel/linux/kni/kni_dev.h:104:37: error: passing argument 1 of ‘get_user_pages_remote’ from incompatible pointer type [-Werror=incompatible-pointer-types]104 |         ret = get_user_pages_remote(tsk, tsk->mm, iova, 1,|                                     ^~~|                                     ||                                     struct task_struct *
In file included from ./arch/x86/include/asm/cacheflush.h:5,from ./include/linux/cacheflush.h:5,from ./include/linux/highmem.h:8,from ./include/linux/bvec.h:10,from ./include/linux/skbuff.h:17,from ./include/net/net_namespace.h:39,from ./include/linux/netdevice.h:37,from /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.c:9:
./include/linux/mm.h:1943:46: note: expected ‘struct mm_struct *’ but argument is of type ‘struct task_struct *’1943 | long get_user_pages_remote(struct mm_struct *mm,|                            ~~~~~~~~~~~~~~~~~~^~

解决办法：
修改 kernel/linux/kni/kni_dev.h 文件104行，改成：

#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 9, 0)ret = get_user_pages_remote(tsk->mm, iova, 1,FOLL_TOUCH, &page, NULL, NULL);
#elseret = get_user_pages_remote(tsk, tsk->mm, iova, 1,FOLL_TOUCH, &page, NULL, NULL);
#endif /* >= 5.9.0 */

3. error: implicit declaration of function ‘random_ether_addr’

== Build kernel/linux/kniCC [M]  /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.o
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.c: In function ‘kni_ioctl_create’:
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.c:406:17: error: implicit declaration of function ‘random_ether_addr’ [-Werror=implicit-function-declaration]406 |                 random_ether_addr(net_dev->dev_addr);|                 ^~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

解决办法：
修改 x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.c 文件 406行，
将 random_ether_addr 函数修改为 eth_random_addr。

4. error: initialization of ‘void (*)(struct net_device , unsigned int)’ from incompatible pointer type ‘void ()(struct net_device *)

== Build kernel/linux/kniCC [M]  /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_misc.oCC [M]  /root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_net.o
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_net.c:786:27: error: initialization of ‘void (*)(struct net_device *, unsigned int)’ from incompatible pointer type ‘void (*)(struct net_device *)’ [-Werror=incompatible-pointer-types]786 |         .ndo_tx_timeout = kni_net_tx_timeout,|                           ^~~~~~~~~~~~~~~~~~
/root/dpdk-19.11/x86_64-native-linuxapp-gcc/build/kernel/linux/kni/kni_net.c:786:27: note: (near initialization for ‘kni_net_netdev_ops.ndo_tx_timeout’)
cc1: all warnings being treated as errors

解决办法：

修改 x86_64-native-linuxapp-gcc/build/kernel/linux/kni/Makefile 文件，MODULE_CFLAGS += -Wall -Werror 这一行追加 -Wno-error=incompatible-pointer-types 编译选项