├── README.md ├── ex1-hello ├── Makefile ├── README.md └── hello.c ├── ex10-print_vmem ├── Makefile └── vma.c ├── ex11-alloc_mm ├── Makefile └── alloc_mm.c ├── ex12-slab ├── Makefile └── slab.c ├── ex13-syscall ├── .syscall.ko.cmd ├── .syscall.mod.cmd ├── .syscall.mod.o.cmd ├── .syscall.o.cmd ├── Makefile ├── Module.symvers ├── a.out ├── modules.order ├── syscall.c ├── syscall.ko ├── syscall.mod ├── syscall.mod.c ├── syscall.mod.o ├── syscall.o └── test.c ├── ex14-drop-packet ├── __MACOSX │ └── drop-packet │ │ ├── ._.DS_Store │ │ ├── ._drop-packet.docx │ │ └── src │ │ ├── ._.DS_Store │ │ ├── step1 │ │ ├── ._.DS_Store │ │ ├── ._Makefile │ │ ├── ._drop_packet.h │ │ └── ._main.c │ │ └── step2 │ │ └── ._main.c └── drop-packet │ ├── .DS_Store │ ├── drop-packet.docx │ └── src │ ├── .DS_Store │ ├── step1 │ ├── .DS_Store │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .tmp_versions │ │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── main.c │ ├── main.o │ └── modules.order │ ├── step2 │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .tmp_versions │ │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── main.c │ ├── main.o │ └── modules.order │ ├── step3 │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .misc.o.cmd │ ├── .tmp_versions │ │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── main.c │ ├── main.o │ ├── misc.c │ ├── misc.o │ └── modules.order │ ├── step4 │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .misc.o.cmd │ ├── .tmp_versions │ │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── main.c │ ├── main.o │ ├── misc.c │ ├── misc.o │ └── modules.order │ ├── step5 │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .misc.o.cmd │ ├── .tmp_versions │ │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── index.html │ ├── main.c │ ├── main.o │ ├── misc.c │ ├── misc.o │ └── modules.order │ └── step6 │ ├── .cache.mk │ ├── .drop-packet.ko.cmd │ ├── .drop-packet.mod.o.cmd │ ├── .drop-packet.o.cmd │ ├── .main.o.cmd │ ├── .misc.o.cmd │ ├── .tmp_versions │ └── drop-packet.mod │ ├── Makefile │ ├── Module.symvers │ ├── drop-packet.ko │ ├── drop-packet.mod.c │ ├── drop-packet.mod.o │ ├── drop-packet.o │ ├── drop_packet.h │ ├── index.html │ ├── main.c │ ├── main.o │ ├── misc.c │ ├── misc.o │ └── modules.order ├── ex2-exnum ├── Makefile ├── exnum.c ├── maxnum.c ├── test │ ├── diff.out │ ├── same.out │ ├── testmax.c │ ├── testmax.out │ ├── text_diff.c │ ├── text_same.c │ ├── type.out │ └── type2.out └── 运行结果.png ├── ex3-lklist ├── .Makefile.swo ├── .Makefile.swp ├── Makefile ├── lklist.c ├── 删除10个节点.png ├── 插入100个节点.png └── 还有90个.png ├── ex4-kernel_param ├── Makefile ├── kernel_param.c ├── 查看结果.png └── 输入参数.png ├── ex5-Makefile2file ├── Makefile ├── hello1.c ├── hello2.c └── 运行结果.png ├── ex6-rbtree ├── Makefile ├── rbtree.c └── 运行结果.png ├── ex7-ForkAndClone ├── fork_test └── fork_test.c ├── ex8-KernelThread ├── .kthread.o.d ├── Makefile └── kthread.c ├── ex9-TraversePcb ├── Makefile └── traverse_pcb.c └── 代码目录索引.md /README.md: -------------------------------------------------------------------------------- 1 | 2 | #
索引目录
3 | 4 | 本文总结了Linux初学者系列文章，从安装Linux操作系统开始，搭建Linux环境，编写代码，使用工具，手把手带大家走进Linux内核的世界。文章也是作者初学内核时所写，难免有不周全之处，若有问题之处，大家可以联系作者。 5 | 6 | #### 作者寄语：热爱开源，践行开放、自由、分享，希望和大家一起进步，谢谢大家。 7 | Linux内核之旅网站：[http://kerneltravel.net/](http://kerneltravel.net/) 8 | 9 | 目录更新地址：[https://blog.csdn.net/qq_34258344/article/details/102015623](https://blog.csdn.net/qq_34258344/article/details/102015623) 10 | 11 | GitHub地址：[https://github.com/ljrcore](https://github.com/ljrcore) 12 | 13 | 14 | ##
Linux初学者入门系列
15 | 16 | || 17 | |--| 18 | |[手把手教你搭建Linux开发环境（VMware+Ubuntu）（一）——安装VMware虚拟机和Ubuntu](https://blog.csdn.net/qq_34258344/article/details/101175849)| 19 | |[手把手教你搭建Linux开发环境（VMware+Ubuntu）（二）——安装VMwareTools并设置共享文件夹](https://blog.csdn.net/qq_34258344/article/details/101942788) | 20 | | [手把手教你搭建Linux开发环境（VMware+Ubuntu）（三）——Ubuntu下vim编辑器的安装、配置和使用](https://blog.csdn.net/qq_34258344/article/details/97525312) | 21 | | [手把手教你搭建Linux开发环境（VMware+Ubuntu）（四）——gcc编译器的安装和使用](https://blog.csdn.net/qq_34258344/article/details/101975444) | 22 | | [Linux初学者接住了---Linux常用命令](https://blog.csdn.net/qq_34258344/article/details/96960662) | 23 | | [Xshell远程登录Ubuntu](https://blog.csdn.net/qq_34258344/article/details/97394189) | 24 | | [网站迁移的一般步骤、常见问题及解决措施](https://blog.csdn.net/qq_34258344/article/details/99619696) | 25 | 26 | ##
Linux内核系列
27 | 28 | || 29 | |--| 30 | |[陈老师Linux内核概述导学](https://blog.csdn.net/qq_34258344/article/details/102399144)| 31 | |[陈老师Linux内核内存寻址导学](https://blog.csdn.net/qq_34258344/article/details/102399578)| 32 | |[陈老师Linux内核进程管理导学](https://blog.csdn.net/qq_34258344/article/details/102399917)| 33 | | [Linxu内核模块开发入门](https://blog.csdn.net/qq_34258344/article/details/95028200) | 34 | |[如何使用Linux内核中没有被导出的变量或函数](https://blog.csdn.net/qq_34258344/article/details/103547971)| 35 | | [Linux内核中max()宏的奥妙何在？（一）](https://blog.csdn.net/qq_34258344/article/details/101039771) | 36 | | [Linux内核中max()宏的奥妙何在？（二）——大神Linus对这个宏怎么看？](https://blog.csdn.net/qq_34258344/article/details/101161512) | 37 | | [Linux内核之浅谈内存寻址](https://blog.csdn.net/qq_34258344/article/details/95519020)| 38 | | [Linux内核之话说进程](https://blog.csdn.net/qq_34258344/article/details/98347167) | 39 | | [Linux内核之内核同步（一）——内核同步基础](https://blog.csdn.net/qq_34258344/article/details/103324755)| 40 | |[Linux内核之内核同步（二）——原子操作](https://blog.csdn.net/qq_34258344/article/details/100592236)| 41 | |[Linux内核之内核同步（三）——自旋锁](https://blog.csdn.net/qq_34258344/article/details/103326114)| 42 | |[Linux 系统调用（一）](https://editor.csdn.net/md/?articleId=104537181)| 43 | |[Linux 系统调用（二）——使用内核模块添加系统调用（无需编译内核）](https://editor.csdn.net/md/?articleId=103228607)| 44 | |[Linux内核网络（一）——初探内核网络](https://editor.csdn.net/md/?articleId=105848293)| 45 | 46 | 47 | ##
Linux性能优化
48 | 49 | || 50 | |--| 51 | |[Linux系统cpu负载浅析](https://blog.csdn.net/qq_34258344/article/details/102584504)| 52 | |[内核同步对性能的影响及perf的安装和简单的使用](https://blog.csdn.net/qq_34258344/article/details/104309361)| 53 | |[eBPF & bcc 教程（一）](https://blog.csdn.net/qq_34258344/article/details/104400738)| 54 | |[eBPF & bcc教程（二）](https://blog.csdn.net/qq_34258344/article/details/104531060)| 55 | 56 | 57 | ##
Docker
58 | || 59 | | -- | 60 | | [Docker初体验](https://blog.csdn.net/qq_34258344/article/details/95972999) | 61 | | [Ubuntu中安装最新Docker社区版](https://blog.csdn.net/qq_34258344/article/details/102671094) | 62 | | [Ubuntu中安装docker-compose](https://blog.csdn.net/qq_34258344/article/details/102715511) | 63 | 64 | 65 | ##
Git
66 | || 67 | |--| 68 | | [Linux下如何快速使用GitHub](https://blog.csdn.net/qq_34258344/article/details/100625434)| 69 | |[使用GitHub免费搭建属于自己的网站](https://editor.csdn.net/md/?articleId=104665562)| 70 | 71 | 72 | ##
其它
73 | || 74 | | -- | 75 | |[Ubuntu下安装中文输入法（本博客安装的搜狗输入法）](https://blog.csdn.net/qq_34258344/article/details/102997942)| 76 | |[解决Ubuntu中sublime无法输入中文的问题](https://editor.csdn.net/md/?articleId=104849673)| 77 | |[并行计算、分布式计算、集群计算和云计算，大科普！](https://editor.csdn.net/md/?articleId=104798142)| 78 | |[使用微软官方工具下载最新系统(win10为例)](https://editor.csdn.net/md/?articleId=104701570)| 79 | -------------------------------------------------------------------------------- /ex1-hello/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:= hello.o 2 | CURRENT_PATH:=$(shell pwd) 3 | LINUX_KERNEL:=$(shell uname -r) 4 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 5 | 6 | all: 7 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 8 | clean: 9 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 10 | 11 | -------------------------------------------------------------------------------- /ex1-hello/README.md: -------------------------------------------------------------------------------- 1 | # 经典的hello world入门代码 2 | -------------------------------------------------------------------------------- /ex1-hello/hello.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | static int __init lk_hello(void) 6 | { 7 | printk("hello world!\n"); 8 | return 0; 9 | } 10 | static void __exit lk_exit(void) 11 | { 12 | printk("good bye!\n"); 13 | 14 | } 15 | module_init(lk_hello); 16 | module_exit(lk_exit); 17 | MODULE_LICENSE("GPL"); 18 | 19 | -------------------------------------------------------------------------------- /ex10-print_vmem/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=vma.o 2 | 3 | CURRENT_PATH:=$(shell pwd) 4 | LINUX_KERNEL:=$(shell uname -r) 5 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 6 | 7 | all: 8 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 9 | 10 | clean: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 12 | -------------------------------------------------------------------------------- /ex10-print_vmem/vma.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | 6 | static int pid; 7 | module_param(pid, int, 0644); 8 | 9 | static void printit(struct task_struct *tsk) 10 | { 11 | struct mm_struct *mm; 12 | struct vm_area_struct *vma; 13 | int j = 0; 14 | unsigned long start, end, length; 15 | 16 | mm = tsk->mm; 17 | pr_info("mm_struct addr = 0x%p\n", mm); 18 | vma = mm->mmap; 19 | 20 | /* protect from simultaneous modification */ 21 | down_read(&mm->mmap_sem); 22 | pr_info("vmas: vma start end length\n"); 23 | 24 | while (vma) { 25 | j++; 26 | start = vma->vm_start; 27 | end = vma->vm_end; 28 | length = end - start; 29 | pr_info("%6d: %16p %12lx %12lx %8ld\n", 30 | j, vma, start, end, length); 31 | vma = vma->vm_next; 32 | } 33 | up_read(&mm->mmap_sem); 34 | } 35 | 36 | static int __init my_init(void) 37 | { 38 | struct task_struct *tsk; 39 | /* if don't pass the pid over insmod, then use the current process */ 40 | if (pid == 0) { 41 | tsk = current; 42 | pid = current->pid; 43 | pr_info("using current process\n"); 44 | } else { 45 | tsk = pid_task(find_vpid(pid), PIDTYPE_PID); 46 | } 47 | if (!tsk) 48 | return -1; 49 | pr_info(" Examining vma's for pid=%d, command=%s\n", pid, tsk->comm); 50 | printit(tsk); 51 | return 0; 52 | } 53 | 54 | static void __exit my_exit(void) 55 | { 56 | pr_info("Module exit\n"); 57 | } 58 | 59 | module_init(my_init); 60 | module_exit(my_exit); 61 | 62 | MODULE_LICENSE("GPL v2"); 63 | -------------------------------------------------------------------------------- /ex11-alloc_mm/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=alloc_mm.o 2 | 3 | CURRENT_PATH:=$(shell pwd) 4 | LINUX_KERNEL:=$(shell uname -r) 5 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 6 | 7 | all: 8 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 9 | 10 | clean: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 12 | -------------------------------------------------------------------------------- /ex11-alloc_mm/alloc_mm.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | 6 | static int mem = 64; 7 | 8 | #define MB (1024*1024) 9 | 10 | static int __init my_init(void) 11 | { 12 | char *kbuf; 13 | unsigned long order; 14 | unsigned long size; 15 | char *vm_buff; 16 | 17 | /* try __get_free_pages__ */ 18 | for (size = PAGE_SIZE, order = 0; order < MAX_ORDER; 19 | order++, size *= 2) { 20 | pr_info(" order=%2lu, pages=%5lu, size=%8lu ", order, 21 | size / PAGE_SIZE, size); 22 | kbuf = (char *)__get_free_pages(GFP_ATOMIC, order); 23 | if (!kbuf) { 24 | pr_err("... __get_free_pages failed\n"); 25 | break; 26 | } 27 | pr_info("... __get_free_pages OK\n"); 28 | free_pages((unsigned long)kbuf, order); 29 | } 30 | 31 | /* try kmalloc */ 32 | for (size = PAGE_SIZE, order = 0; order < MAX_ORDER; 33 | order++, size *= 2) { 34 | pr_info(" order=%2lu, pages=%5lu, size=%8lu ", order, 35 | size / PAGE_SIZE, size); 36 | kbuf = kmalloc((size_t) size, GFP_ATOMIC); 37 | if (!kbuf) { 38 | pr_err("... kmalloc failed\n"); 39 | break; 40 | } 41 | pr_info("... kmalloc OK\n"); 42 | kfree(kbuf); 43 | } 44 | 45 | /* try vmalloc */ 46 | for (size = 4 * MB; size <= mem * MB; size += 4 * MB) { 47 | pr_info(" pages=%6lu, size=%8lu ", size / PAGE_SIZE, size / MB); 48 | vm_buff = vmalloc(size); 49 | if (!vm_buff) { 50 | pr_err("... vmalloc failed\n"); 51 | break; 52 | } 53 | pr_info("... vmalloc OK\n"); 54 | vfree(vm_buff); 55 | } 56 | 57 | return 0; 58 | } 59 | 60 | static void __exit my_exit(void) 61 | { 62 | pr_info("Module exit\n"); 63 | } 64 | 65 | module_init(my_init); 66 | module_exit(my_exit); 67 | 68 | MODULE_LICENSE("GPL v2"); 69 | -------------------------------------------------------------------------------- /ex12-slab/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=slab.o 2 | 3 | CURRENT_PATH:=$(shell pwd) 4 | LINUX_KERNEL:=$(shell uname -r) 5 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 6 | 7 | all: 8 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 9 | 10 | clean: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 12 | -------------------------------------------------------------------------------- /ex12-slab/slab.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | 6 | static char *kbuf; 7 | static int size = 21*PAGE_SIZE; 8 | static struct kmem_cache *my_cache; 9 | module_param(size, int, 0644); 10 | 11 | static int __init my_init(void) 12 | { 13 | /* create a memory cache */ 14 | if (size > KMALLOC_MAX_SIZE) { 15 | pr_err 16 | (" size=%d is too large; you can't have more than %lu!\n", 17 | size, KMALLOC_MAX_SIZE); 18 | return -1; 19 | } 20 | 21 | my_cache = kmem_cache_create("mycache", size, 0, 22 | SLAB_HWCACHE_ALIGN, NULL); 23 | if (!my_cache) { 24 | pr_err("kmem_cache_create failed\n"); 25 | return -ENOMEM; 26 | } 27 | pr_info("create mycache correctly\n"); 28 | 29 | /* allocate a memory cache object */ 30 | kbuf = kmem_cache_alloc(my_cache, GFP_ATOMIC); 31 | if (!kbuf) { 32 | pr_err(" failed to create a cache object\n"); 33 | (void)kmem_cache_destroy(my_cache); 34 | return -1; 35 | } 36 | pr_info(" successfully created a object, kbuf_addr=0x%p\n", kbuf); 37 | 38 | return 0; 39 | } 40 | 41 | static void __exit my_exit(void) 42 | { 43 | /* destroy a memory cache object */ 44 | kmem_cache_free(my_cache, kbuf); 45 | pr_info("destroyed a cache object\n"); 46 | 47 | /* destroy the memory cache */ 48 | kmem_cache_destroy(my_cache); 49 | pr_info("destroyed mycache\n"); 50 | } 51 | 52 | module_init(my_init); 53 | module_exit(my_exit); 54 | 55 | MODULE_LICENSE("GPL v2"); 56 | MODULE_AUTHOR("Ben ShuShu"); 57 | -------------------------------------------------------------------------------- /ex13-syscall/.syscall.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/ljr/Learning_linux_kernel/ex13-syscall/syscall.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.ko /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.o /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex13-syscall/.syscall.mod.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/ljr/Learning_linux_kernel/ex13-syscall/syscall.mod := { echo /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.o; echo; } > /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.mod 2 | -------------------------------------------------------------------------------- /ex13-syscall/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=syscall.o 2 | PWD:= $(shell pwd) 3 | KERNELDIR:= /lib/modules/$(shell uname -r)/build 4 | EXTRA_CFLAGS= -O0 5 | 6 | all: 7 | make -C $(KERNELDIR) M=$(PWD) modules 8 | clean: 9 | make -C $(KERNELDIR) M=$(PWD) clean 10 | -------------------------------------------------------------------------------- /ex13-syscall/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex13-syscall/Module.symvers -------------------------------------------------------------------------------- /ex13-syscall/a.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex13-syscall/a.out -------------------------------------------------------------------------------- /ex13-syscall/modules.order: -------------------------------------------------------------------------------- 1 | /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.ko 2 | -------------------------------------------------------------------------------- /ex13-syscall/syscall.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | 10 | #define __NR_syscall 335 /* 系统调用号335 */ 11 | 12 | unsigned long * sys_call_table; 13 | 14 | unsigned int clear_and_return_cr0(void); 15 | void setback_cr0(unsigned int val); 16 | static int sys_mycall(void); 17 | 18 | 19 | int orig_cr0; /* 用来存储cr0寄存器原来的值 */ 20 | unsigned long *sys_call_table = 0; 21 | static int (*anything_saved)(void); /*定义一个函数指针，用来保存一个系统调用*/ 22 | /* 23 | * 设置cr0寄存器的第17位为0 24 | */ 25 | unsigned int clear_and_return_cr0(void) 26 | { 27 | unsigned int cr0 = 0; 28 | unsigned int ret; 29 | /* 前者用在32位系统。后者用在64位系统，本系统64位 */ 30 | //asm volatile ("movl %%cr0, %%eax" : "=a"(cr0)); 31 | asm volatile ("movq %%cr0, %%rax" : "=a"(cr0)); /* 将cr0寄存器的值移动到rax寄存器中，同时输出到cr0变量中 */ 32 | ret = cr0; 33 | cr0 &= 0xfffeffff; /* 将cr0变量值中的第17位清0，将修改后的值写入cr0寄存器 */ 34 | //asm volatile ("movl %%eax, %%cr0" :: "a"(cr0)); 35 | asm volatile ("movq %%rax, %%cr0" :: "a"(cr0)); /* 读取cr0的值到rax寄存器，再将rax寄存器的值放入cr0中 */ 36 | return ret; 37 | } 38 | 39 | /* 读取val的值到rax寄存器，再将rax寄存器的值放入cr0中 */ 40 | void setback_cr0(unsigned int val) 41 | { 42 | 43 | //asm volatile ("movl %%eax, %%cr0" :: "a"(val)); 44 | asm volatile ("movq %%rax, %%cr0" :: "a"(val)); 45 | } 46 | 47 | /* 添加自己的系统调用函数 */ 48 | static int sys_mycall(void) 49 | { 50 | int ret = 12345; 51 | printk("My syscall is successful!\n"); 52 | return ret; 53 | } 54 | 55 | /*模块的初始化函数，模块的入口函数，加载模块*/ 56 | static int __init init_addsyscall(void) 57 | { 58 | printk("My syscall is starting。。。\n"); 59 | sys_call_table = (unsigned long *)kallsyms_lookup_name("sys_call_table"); /* 获取系统调用服务首地址 */ 60 | printk("sys_call_table: 0x%p\n", sys_call_table); 61 | anything_saved = (int(*)(void))(sys_call_table[__NR_syscall]); /* 保存原始系统调用 */ 62 | orig_cr0 = clear_and_return_cr0(); /* 设置cr0可更改 */ 63 | sys_call_table[__NR_syscall] = (unsigned long)&sys_mycall; /* 更改原始的系统调用服务地址 */ 64 | setback_cr0(orig_cr0); /* 设置为原始的只读cr0 */ 65 | return 0; 66 | } 67 | 68 | /*出口函数，卸载模块*/ 69 | static void __exit exit_addsyscall(void) 70 | { 71 | orig_cr0 = clear_and_return_cr0(); /* 设置cr0中对sys_call_table的更改权限 */ 72 | sys_call_table[__NR_syscall] = (unsigned long)anything_saved; /* 设置cr0可更改 */ 73 | setback_cr0(orig_cr0); /* 恢复原有的中断向量表中的函数指针的值 */ 74 | printk("My syscall exit....\n"); /* 恢复原有的cr0的值 */ 75 | } 76 | 77 | module_init(init_addsyscall); 78 | module_exit(exit_addsyscall); 79 | MODULE_LICENSE("GPL"); 80 | -------------------------------------------------------------------------------- /ex13-syscall/syscall.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex13-syscall/syscall.ko -------------------------------------------------------------------------------- /ex13-syscall/syscall.mod: -------------------------------------------------------------------------------- 1 | /home/ljr/Learning_linux_kernel/ex13-syscall/syscall.o 2 | 3 | -------------------------------------------------------------------------------- /ex13-syscall/syscall.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | 6 | BUILD_SALT; 7 | 8 | MODULE_INFO(vermagic, VERMAGIC_STRING); 9 | MODULE_INFO(name, KBUILD_MODNAME); 10 | 11 | __visible struct module __this_module 12 | __attribute__((section(".gnu.linkonce.this_module"))) = { 13 | .name = KBUILD_MODNAME, 14 | .init = init_module, 15 | #ifdef CONFIG_MODULE_UNLOAD 16 | .exit = cleanup_module, 17 | #endif 18 | .arch = MODULE_ARCH_INIT, 19 | }; 20 | 21 | #ifdef CONFIG_RETPOLINE 22 | MODULE_INFO(retpoline, "Y"); 23 | #endif 24 | 25 | static const char __module_depends[] 26 | __used 27 | __attribute__((section(".modinfo"))) = 28 | "depends="; 29 | 30 | 31 | MODULE_INFO(srcversion, "174A74DD920B69890CA58EB"); 32 | -------------------------------------------------------------------------------- /ex13-syscall/syscall.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex13-syscall/syscall.mod.o -------------------------------------------------------------------------------- /ex13-syscall/syscall.o: 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/ex14-drop-packet/drop-packet/src/step1/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/.drop-packet.mod.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o := gcc -Wp,-MD,/home/xiebaoyou/study/陈老师/drop-packet/src/step1/.drop-packet.mod.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/5/include -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -Iubuntu/include -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-PIE -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -DRETPOLINE -fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0 -DCC_HAVE_ASM_GOTO -Wframe-larger-than=1024 -fstack-protector-strong -Wno-unused-but-set-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-var-tracking-assignments -pg -mfentry -DCC_USING_FENTRY -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -I/home/xiebaoyou/study/陈老师/drop-packet/src/step1/ -DKBUILD_BASENAME='"drop_packet.mod"' -DKBUILD_MODNAME='"drop_packet"' -DMODULE -DUBUNTU_1604 -c -o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.c 2 | 3 | source_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o := /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.c 4 | 5 | deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o := \ 6 | $(wildcard include/config/module/unload.h) \ 7 | include/linux/compiler_types.h \ 8 | $(wildcard include/config/enable/must/check.h) \ 9 | $(wildcard include/config/enable/warn/deprecated.h) \ 10 | include/linux/compiler-gcc.h \ 11 | $(wildcard include/config/arch/supports/optimized/inlining.h) \ 12 | $(wildcard include/config/optimize/inlining.h) \ 13 | $(wildcard include/config/gcov/kernel.h) \ 14 | $(wildcard include/config/arch/use/builtin/bswap.h) \ 15 | include/linux/module.h \ 16 | $(wildcard include/config/modules.h) \ 17 | $(wildcard include/config/sysfs.h) \ 18 | $(wildcard include/config/modules/tree/lookup.h) \ 19 | $(wildcard include/config/livepatch.h) \ 20 | $(wildcard include/config/unused/symbols.h) \ 21 | $(wildcard include/config/module/sig.h) \ 22 | $(wildcard include/config/generic/bug.h) \ 23 | $(wildcard include/config/kallsyms.h) \ 24 | $(wildcard include/config/smp.h) \ 25 | $(wildcard include/config/tracepoints.h) \ 26 | $(wildcard include/config/tracing.h) \ 27 | $(wildcard include/config/event/tracing.h) \ 28 | $(wildcard include/config/ftrace/mcount/record.h) \ 29 | $(wildcard include/config/constructors.h) \ 30 | $(wildcard include/config/strict/module/rwx.h) \ 31 | include/linux/list.h \ 32 | $(wildcard include/config/debug/list.h) \ 33 | include/linux/types.h \ 34 | $(wildcard include/config/have/uid16.h) \ 35 | $(wildcard include/config/uid16.h) \ 36 | $(wildcard include/config/lbdaf.h) \ 37 | $(wildcard include/config/arch/dma/addr/t/64bit.h) \ 38 | $(wildcard include/config/phys/addr/t/64bit.h) \ 39 | $(wildcard include/config/64bit.h) \ 40 | include/uapi/linux/types.h \ 41 | arch/x86/include/uapi/asm/types.h \ 42 | include/uapi/asm-generic/types.h \ 43 | include/asm-generic/int-ll64.h \ 44 | include/uapi/asm-generic/int-ll64.h \ 45 | arch/x86/include/uapi/asm/bitsperlong.h \ 46 | include/asm-generic/bitsperlong.h \ 47 | include/uapi/asm-generic/bitsperlong.h \ 48 | include/uapi/linux/posix_types.h \ 49 | include/linux/stddef.h \ 50 | include/uapi/linux/stddef.h \ 51 | arch/x86/include/asm/posix_types.h \ 52 | $(wildcard include/config/x86/32.h) \ 53 | arch/x86/include/uapi/asm/posix_types_64.h \ 54 | include/uapi/asm-generic/posix_types.h \ 55 | include/linux/poison.h \ 56 | $(wildcard include/config/illegal/pointer/value.h) \ 57 | $(wildcard include/config/page/poisoning/zero.h) \ 58 | include/uapi/linux/const.h \ 59 | include/linux/kernel.h \ 60 | $(wildcard include/config/preempt/voluntary.h) \ 61 | $(wildcard include/config/debug/atomic/sleep.h) \ 62 | $(wildcard include/config/mmu.h) \ 63 | $(wildcard include/config/prove/locking.h) \ 64 | $(wildcard include/config/arch/has/refcount.h) \ 65 | $(wildcard include/config/lock/down/kernel.h) \ 66 | $(wildcard include/config/panic/timeout.h) \ 67 | /usr/lib/gcc/x86_64-linux-gnu/5/include/stdarg.h \ 68 | include/linux/linkage.h \ 69 | include/linux/stringify.h \ 70 | include/linux/export.h \ 71 | $(wildcard include/config/have/underscore/symbol/prefix.h) \ 72 | $(wildcard include/config/modversions.h) \ 73 | $(wildcard include/config/module/rel/crcs.h) \ 74 | $(wildcard include/config/trim/unused/ksyms.h) \ 75 | arch/x86/include/asm/linkage.h \ 76 | $(wildcard include/config/x86/64.h) \ 77 | $(wildcard include/config/x86/alignment/16.h) \ 78 | include/linux/compiler.h \ 79 | $(wildcard include/config/trace/branch/profiling.h) \ 80 | $(wildcard include/config/profile/all/branches.h) \ 81 | $(wildcard include/config/stack/validation.h) \ 82 | $(wildcard include/config/kasan.h) \ 83 | arch/x86/include/asm/barrier.h \ 84 | $(wildcard include/config/x86/ppro/fence.h) \ 85 | arch/x86/include/asm/alternative.h \ 86 | arch/x86/include/asm/asm.h \ 87 | arch/x86/include/asm/nops.h \ 88 | $(wildcard include/config/mk7.h) \ 89 | $(wildcard include/config/x86/p6/nop.h) \ 90 | include/asm-generic/barrier.h \ 91 | include/linux/bitops.h \ 92 | arch/x86/include/asm/bitops.h \ 93 | $(wildcard include/config/x86/cmov.h) \ 94 | arch/x86/include/asm/rmwcc.h \ 95 | include/asm-generic/bitops/find.h \ 96 | $(wildcard include/config/generic/find/first/bit.h) \ 97 | include/asm-generic/bitops/sched.h \ 98 | arch/x86/include/asm/arch_hweight.h \ 99 | arch/x86/include/asm/cpufeatures.h \ 100 | arch/x86/include/asm/required-features.h \ 101 | $(wildcard include/config/x86/minimum/cpu/family.h) \ 102 | $(wildcard include/config/math/emulation.h) \ 103 | $(wildcard include/config/x86/pae.h) \ 104 | $(wildcard include/config/x86/cmpxchg64.h) \ 105 | $(wildcard include/config/x86/use/3dnow.h) \ 106 | $(wildcard include/config/matom.h) \ 107 | $(wildcard include/config/x86/5level.h) \ 108 | $(wildcard include/config/paravirt.h) \ 109 | arch/x86/include/asm/disabled-features.h \ 110 | $(wildcard include/config/x86/intel/mpx.h) \ 111 | $(wildcard include/config/x86/intel/umip.h) \ 112 | $(wildcard include/config/x86/intel/memory/protection/keys.h) \ 113 | $(wildcard include/config/page/table/isolation.h) \ 114 | include/asm-generic/bitops/const_hweight.h \ 115 | include/asm-generic/bitops/le.h \ 116 | arch/x86/include/uapi/asm/byteorder.h \ 117 | include/linux/byteorder/little_endian.h \ 118 | $(wildcard include/config/cpu/big/endian.h) \ 119 | include/uapi/linux/byteorder/little_endian.h \ 120 | include/linux/swab.h \ 121 | include/uapi/linux/swab.h \ 122 | arch/x86/include/uapi/asm/swab.h \ 123 | include/linux/byteorder/generic.h \ 124 | include/asm-generic/bitops/ext2-atomic-setbit.h \ 125 | include/linux/log2.h \ 126 | $(wildcard include/config/arch/has/ilog2/u32.h) \ 127 | $(wildcard include/config/arch/has/ilog2/u64.h) \ 128 | include/linux/typecheck.h \ 129 | include/linux/printk.h \ 130 | $(wildcard include/config/message/loglevel/default.h) \ 131 | $(wildcard include/config/console/loglevel/default.h) \ 132 | $(wildcard include/config/early/printk.h) \ 133 | $(wildcard include/config/printk/nmi.h) \ 134 | $(wildcard include/config/printk.h) \ 135 | $(wildcard include/config/kmsg/ids.h) \ 136 | $(wildcard include/config/dynamic/debug.h) \ 137 | include/linux/init.h \ 138 | $(wildcard include/config/strict/kernel/rwx.h) \ 139 | include/linux/kern_levels.h \ 140 | include/linux/cache.h \ 141 | $(wildcard include/config/arch/has/cache/line/size.h) \ 142 | include/uapi/linux/kernel.h \ 143 | include/uapi/linux/sysinfo.h \ 144 | arch/x86/include/asm/cache.h \ 145 | $(wildcard include/config/x86/l1/cache/shift.h) \ 146 | $(wildcard include/config/x86/internode/cache/shift.h) \ 147 | $(wildcard include/config/x86/vsmp.h) \ 148 | include/linux/dynamic_debug.h \ 149 | $(wildcard include/config/jump/label.h) \ 150 | include/linux/jump_label.h \ 151 | arch/x86/include/asm/jump_label.h \ 152 | include/linux/build_bug.h \ 153 | include/linux/stat.h \ 154 | arch/x86/include/uapi/asm/stat.h \ 155 | include/uapi/linux/stat.h \ 156 | include/linux/time.h \ 157 | $(wildcard include/config/arch/uses/gettimeoffset.h) \ 158 | include/linux/seqlock.h \ 159 | $(wildcard include/config/debug/lock/alloc.h) \ 160 | include/linux/spinlock.h \ 161 | $(wildcard include/config/debug/spinlock.h) \ 162 | $(wildcard include/config/preempt.h) \ 163 | include/linux/preempt.h \ 164 | $(wildcard include/config/preempt/count.h) \ 165 | $(wildcard include/config/debug/preempt.h) \ 166 | $(wildcard include/config/preempt/tracer.h) \ 167 | $(wildcard include/config/preempt/notifiers.h) \ 168 | arch/x86/include/asm/preempt.h \ 169 | arch/x86/include/asm/percpu.h \ 170 | $(wildcard include/config/x86/64/smp.h) \ 171 | include/asm-generic/percpu.h \ 172 | $(wildcard include/config/have/setup/per/cpu/area.h) \ 173 | include/linux/threads.h \ 174 | $(wildcard include/config/nr/cpus.h) \ 175 | $(wildcard include/config/base/small.h) \ 176 | include/linux/percpu-defs.h \ 177 | $(wildcard include/config/debug/force/weak/per/cpu.h) \ 178 | $(wildcard include/config/virtualization.h) \ 179 | $(wildcard include/config/amd/mem/encrypt.h) \ 180 | include/linux/thread_info.h \ 181 | $(wildcard include/config/thread/info/in/task.h) \ 182 | $(wildcard include/config/debug/stack/usage.h) \ 183 | $(wildcard include/config/debug/kmemleak.h) \ 184 | $(wildcard include/config/have/arch/within/stack/frames.h) \ 185 | $(wildcard include/config/hardened/usercopy.h) \ 186 | include/linux/bug.h \ 187 | $(wildcard include/config/bug/on/data/corruption.h) \ 188 | arch/x86/include/asm/bug.h \ 189 | $(wildcard include/config/debug/bugverbose.h) \ 190 | include/asm-generic/bug.h \ 191 | $(wildcard include/config/bug.h) \ 192 | $(wildcard include/config/generic/bug/relative/pointers.h) \ 193 | include/linux/restart_block.h \ 194 | $(wildcard include/config/compat.h) \ 195 | arch/x86/include/asm/current.h \ 196 | arch/x86/include/asm/thread_info.h \ 197 | $(wildcard include/config/vm86.h) \ 198 | $(wildcard include/config/frame/pointer.h) \ 199 | $(wildcard include/config/ia32/emulation.h) \ 200 | arch/x86/include/asm/page.h \ 201 | arch/x86/include/asm/page_types.h \ 202 | $(wildcard include/config/physical/start.h) \ 203 | $(wildcard include/config/physical/align.h) \ 204 | include/linux/mem_encrypt.h \ 205 | $(wildcard include/config/arch/has/mem/encrypt.h) \ 206 | arch/x86/include/asm/mem_encrypt.h \ 207 | arch/x86/include/uapi/asm/bootparam.h \ 208 | include/linux/screen_info.h \ 209 | include/uapi/linux/screen_info.h \ 210 | include/linux/apm_bios.h \ 211 | include/uapi/linux/apm_bios.h \ 212 | include/uapi/linux/ioctl.h \ 213 | arch/x86/include/uapi/asm/ioctl.h \ 214 | include/asm-generic/ioctl.h \ 215 | include/uapi/asm-generic/ioctl.h \ 216 | include/linux/edd.h \ 217 | include/uapi/linux/edd.h \ 218 | arch/x86/include/asm/ist.h \ 219 | arch/x86/include/uapi/asm/ist.h \ 220 | include/video/edid.h \ 221 | $(wildcard include/config/x86.h) \ 222 | include/uapi/video/edid.h \ 223 | arch/x86/include/asm/page_64_types.h \ 224 | $(wildcard include/config/randomize/memory.h) \ 225 | $(wildcard include/config/randomize/base.h) \ 226 | arch/x86/include/asm/kaslr.h \ 227 | arch/x86/include/asm/page_64.h \ 228 | $(wildcard include/config/debug/virtual.h) \ 229 | $(wildcard include/config/flatmem.h) \ 230 | $(wildcard include/config/x86/vsyscall/emulation.h) \ 231 | include/linux/range.h \ 232 | include/asm-generic/memory_model.h \ 233 | $(wildcard include/config/discontigmem.h) \ 234 | $(wildcard include/config/sparsemem/vmemmap.h) \ 235 | $(wildcard include/config/sparsemem.h) \ 236 | include/linux/pfn.h \ 237 | include/asm-generic/getorder.h \ 238 | arch/x86/include/asm/cpufeature.h \ 239 | $(wildcard include/config/x86/feature/names.h) \ 240 | $(wildcard include/config/x86/fast/feature/tests.h) \ 241 | arch/x86/include/asm/processor.h \ 242 | $(wildcard include/config/cc/stackprotector.h) \ 243 | $(wildcard include/config/x86/debugctlmsr.h) \ 244 | $(wildcard include/config/cpu/sup/amd.h) \ 245 | $(wildcard include/config/xen.h) \ 246 | arch/x86/include/asm/processor-flags.h \ 247 | arch/x86/include/uapi/asm/processor-flags.h \ 248 | arch/x86/include/asm/math_emu.h \ 249 | arch/x86/include/asm/ptrace.h \ 250 | arch/x86/include/asm/segment.h \ 251 | $(wildcard include/config/xen/pv.h) \ 252 | $(wildcard include/config/x86/32/lazy/gs.h) \ 253 | arch/x86/include/uapi/asm/ptrace.h \ 254 | arch/x86/include/uapi/asm/ptrace-abi.h \ 255 | arch/x86/include/asm/paravirt_types.h \ 256 | $(wildcard include/config/pgtable/levels.h) \ 257 | $(wildcard include/config/paravirt/debug.h) \ 258 | arch/x86/include/asm/desc_defs.h \ 259 | arch/x86/include/asm/kmap_types.h \ 260 | $(wildcard include/config/debug/highmem.h) \ 261 | include/asm-generic/kmap_types.h \ 262 | arch/x86/include/asm/pgtable_types.h \ 263 | $(wildcard include/config/mem/soft/dirty.h) \ 264 | $(wildcard include/config/proc/fs.h) \ 265 | arch/x86/include/asm/pgtable_64_types.h \ 266 | arch/x86/include/asm/sparsemem.h \ 267 | 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619 | include/linux/kref.h \ 620 | include/linux/refcount.h \ 621 | $(wildcard include/config/refcount/full.h) \ 622 | arch/x86/include/asm/refcount.h \ 623 | include/linux/moduleparam.h \ 624 | $(wildcard include/config/alpha.h) \ 625 | $(wildcard include/config/ia64.h) \ 626 | $(wildcard include/config/ppc64.h) \ 627 | include/linux/rbtree_latch.h \ 628 | arch/x86/include/asm/module.h \ 629 | $(wildcard include/config/unwinder/orc.h) \ 630 | $(wildcard include/config/m486.h) \ 631 | $(wildcard include/config/m586.h) \ 632 | $(wildcard include/config/m586tsc.h) \ 633 | $(wildcard include/config/m586mmx.h) \ 634 | $(wildcard include/config/mcore2.h) \ 635 | $(wildcard include/config/m686.h) \ 636 | $(wildcard include/config/mpentiumii.h) \ 637 | $(wildcard include/config/mpentiumiii.h) \ 638 | $(wildcard include/config/mpentiumm.h) \ 639 | $(wildcard include/config/mpentium4.h) \ 640 | $(wildcard include/config/mk6.h) \ 641 | $(wildcard include/config/mk8.h) \ 642 | $(wildcard include/config/melan.h) \ 643 | $(wildcard include/config/mcrusoe.h) \ 644 | $(wildcard include/config/mefficeon.h) \ 645 | $(wildcard include/config/mwinchipc6.h) \ 646 | $(wildcard include/config/mwinchip3d.h) \ 647 | $(wildcard include/config/mcyrixiii.h) \ 648 | $(wildcard include/config/mviac3/2.h) \ 649 | $(wildcard include/config/mviac7.h) \ 650 | $(wildcard include/config/mgeodegx1.h) \ 651 | $(wildcard include/config/mgeode/lx.h) \ 652 | include/asm-generic/module.h \ 653 | $(wildcard include/config/have/mod/arch/specific.h) \ 654 | $(wildcard include/config/modules/use/elf/rel.h) \ 655 | $(wildcard include/config/modules/use/elf/rela.h) \ 656 | arch/x86/include/asm/orc_types.h \ 657 | include/linux/vermagic.h \ 658 | include/generated/utsrelease.h \ 659 | 660 | /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o: $(deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o) 661 | 662 | $(deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.mod.o): 663 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/.main.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o := gcc -Wp,-MD,/home/xiebaoyou/study/陈老师/drop-packet/src/step1/.main.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/5/include -I./arch/x86/include -I./arch/x86/include/generated -I./include -I./arch/x86/include/uapi -I./arch/x86/include/generated/uapi -I./include/uapi -I./include/generated/uapi -include ./include/linux/kconfig.h -Iubuntu/include -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -fshort-wchar -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -fno-PIE -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -m64 -falign-jumps=1 -falign-loops=1 -mno-80387 -mno-fp-ret-in-387 -mpreferred-stack-boundary=3 -mskip-rax-setup -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -DCONFIG_X86_X32_ABI -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_SSSE3=1 -DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -DCONFIG_AS_AVX512=1 -DCONFIG_AS_SHA1_NI=1 -DCONFIG_AS_SHA256_NI=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mindirect-branch=thunk-extern -mindirect-branch-register -DRETPOLINE -fno-delete-null-pointer-checks -O2 --param=allow-store-data-races=0 -DCC_HAVE_ASM_GOTO -Wframe-larger-than=1024 -fstack-protector-strong -Wno-unused-but-set-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-var-tracking-assignments -pg -mfentry -DCC_USING_FENTRY -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fno-merge-all-constants -fmerge-constants -fno-stack-check -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -Werror=incompatible-pointer-types -Werror=designated-init -I/home/xiebaoyou/study/陈老师/drop-packet/src/step1/ -DMODULE -DUBUNTU_1604 -DKBUILD_BASENAME='"main"' -DKBUILD_MODNAME='"drop_packet"' -c -o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.c 2 | 3 | source_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o := /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.c 4 | 5 | deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o := \ 6 | include/linux/compiler_types.h \ 7 | $(wildcard include/config/enable/must/check.h) \ 8 | $(wildcard include/config/enable/warn/deprecated.h) \ 9 | include/linux/compiler-gcc.h \ 10 | $(wildcard include/config/arch/supports/optimized/inlining.h) \ 11 | $(wildcard include/config/optimize/inlining.h) \ 12 | $(wildcard include/config/gcov/kernel.h) \ 13 | $(wildcard include/config/arch/use/builtin/bswap.h) \ 14 | include/generated/uapi/linux/version.h \ 15 | include/linux/module.h \ 16 | $(wildcard include/config/modules.h) \ 17 | $(wildcard include/config/sysfs.h) \ 18 | $(wildcard include/config/modules/tree/lookup.h) \ 19 | $(wildcard include/config/livepatch.h) \ 20 | $(wildcard include/config/unused/symbols.h) \ 21 | $(wildcard include/config/module/sig.h) \ 22 | $(wildcard include/config/generic/bug.h) \ 23 | $(wildcard include/config/kallsyms.h) \ 24 | $(wildcard include/config/smp.h) \ 25 | $(wildcard include/config/tracepoints.h) \ 26 | $(wildcard include/config/tracing.h) \ 27 | $(wildcard include/config/event/tracing.h) \ 28 | $(wildcard include/config/ftrace/mcount/record.h) \ 29 | $(wildcard include/config/module/unload.h) \ 30 | $(wildcard include/config/constructors.h) \ 31 | $(wildcard include/config/strict/module/rwx.h) \ 32 | include/linux/list.h \ 33 | $(wildcard include/config/debug/list.h) \ 34 | include/linux/types.h \ 35 | $(wildcard include/config/have/uid16.h) \ 36 | $(wildcard include/config/uid16.h) \ 37 | $(wildcard include/config/lbdaf.h) \ 38 | $(wildcard include/config/arch/dma/addr/t/64bit.h) \ 39 | $(wildcard include/config/phys/addr/t/64bit.h) \ 40 | $(wildcard include/config/64bit.h) \ 41 | include/uapi/linux/types.h \ 42 | arch/x86/include/uapi/asm/types.h \ 43 | include/uapi/asm-generic/types.h \ 44 | include/asm-generic/int-ll64.h \ 45 | include/uapi/asm-generic/int-ll64.h \ 46 | arch/x86/include/uapi/asm/bitsperlong.h \ 47 | include/asm-generic/bitsperlong.h \ 48 | include/uapi/asm-generic/bitsperlong.h \ 49 | include/uapi/linux/posix_types.h \ 50 | include/linux/stddef.h \ 51 | include/uapi/linux/stddef.h \ 52 | arch/x86/include/asm/posix_types.h \ 53 | $(wildcard include/config/x86/32.h) \ 54 | arch/x86/include/uapi/asm/posix_types_64.h \ 55 | include/uapi/asm-generic/posix_types.h \ 56 | include/linux/poison.h \ 57 | $(wildcard include/config/illegal/pointer/value.h) \ 58 | $(wildcard include/config/page/poisoning/zero.h) \ 59 | include/uapi/linux/const.h \ 60 | include/linux/kernel.h \ 61 | $(wildcard include/config/preempt/voluntary.h) \ 62 | $(wildcard include/config/debug/atomic/sleep.h) \ 63 | $(wildcard include/config/mmu.h) \ 64 | $(wildcard include/config/prove/locking.h) \ 65 | $(wildcard include/config/arch/has/refcount.h) \ 66 | $(wildcard include/config/lock/down/kernel.h) \ 67 | $(wildcard include/config/panic/timeout.h) \ 68 | /usr/lib/gcc/x86_64-linux-gnu/5/include/stdarg.h \ 69 | include/linux/linkage.h \ 70 | include/linux/stringify.h \ 71 | include/linux/export.h \ 72 | $(wildcard include/config/have/underscore/symbol/prefix.h) \ 73 | $(wildcard include/config/modversions.h) \ 74 | $(wildcard include/config/module/rel/crcs.h) \ 75 | $(wildcard include/config/trim/unused/ksyms.h) \ 76 | arch/x86/include/asm/linkage.h \ 77 | $(wildcard include/config/x86/64.h) \ 78 | $(wildcard include/config/x86/alignment/16.h) \ 79 | include/linux/compiler.h \ 80 | $(wildcard include/config/trace/branch/profiling.h) \ 81 | $(wildcard include/config/profile/all/branches.h) \ 82 | $(wildcard include/config/stack/validation.h) \ 83 | $(wildcard include/config/kasan.h) \ 84 | arch/x86/include/asm/barrier.h \ 85 | $(wildcard include/config/x86/ppro/fence.h) \ 86 | arch/x86/include/asm/alternative.h \ 87 | arch/x86/include/asm/asm.h \ 88 | arch/x86/include/asm/nops.h \ 89 | $(wildcard include/config/mk7.h) \ 90 | $(wildcard include/config/x86/p6/nop.h) \ 91 | include/asm-generic/barrier.h \ 92 | include/linux/bitops.h \ 93 | arch/x86/include/asm/bitops.h \ 94 | $(wildcard include/config/x86/cmov.h) \ 95 | arch/x86/include/asm/rmwcc.h \ 96 | include/asm-generic/bitops/find.h \ 97 | $(wildcard include/config/generic/find/first/bit.h) \ 98 | include/asm-generic/bitops/sched.h \ 99 | arch/x86/include/asm/arch_hweight.h \ 100 | arch/x86/include/asm/cpufeatures.h \ 101 | arch/x86/include/asm/required-features.h \ 102 | $(wildcard include/config/x86/minimum/cpu/family.h) \ 103 | $(wildcard include/config/math/emulation.h) \ 104 | $(wildcard include/config/x86/pae.h) \ 105 | $(wildcard include/config/x86/cmpxchg64.h) \ 106 | $(wildcard include/config/x86/use/3dnow.h) \ 107 | $(wildcard include/config/matom.h) \ 108 | $(wildcard include/config/x86/5level.h) \ 109 | $(wildcard include/config/paravirt.h) \ 110 | arch/x86/include/asm/disabled-features.h \ 111 | $(wildcard include/config/x86/intel/mpx.h) \ 112 | $(wildcard include/config/x86/intel/umip.h) \ 113 | $(wildcard include/config/x86/intel/memory/protection/keys.h) \ 114 | $(wildcard include/config/page/table/isolation.h) \ 115 | include/asm-generic/bitops/const_hweight.h \ 116 | include/asm-generic/bitops/le.h \ 117 | arch/x86/include/uapi/asm/byteorder.h \ 118 | include/linux/byteorder/little_endian.h \ 119 | $(wildcard include/config/cpu/big/endian.h) \ 120 | include/uapi/linux/byteorder/little_endian.h \ 121 | include/linux/swab.h \ 122 | include/uapi/linux/swab.h \ 123 | arch/x86/include/uapi/asm/swab.h \ 124 | include/linux/byteorder/generic.h \ 125 | include/asm-generic/bitops/ext2-atomic-setbit.h \ 126 | include/linux/log2.h \ 127 | $(wildcard include/config/arch/has/ilog2/u32.h) \ 128 | $(wildcard include/config/arch/has/ilog2/u64.h) \ 129 | include/linux/typecheck.h \ 130 | include/linux/printk.h \ 131 | $(wildcard include/config/message/loglevel/default.h) \ 132 | $(wildcard include/config/console/loglevel/default.h) \ 133 | $(wildcard include/config/early/printk.h) \ 134 | $(wildcard include/config/printk/nmi.h) \ 135 | $(wildcard include/config/printk.h) \ 136 | $(wildcard include/config/kmsg/ids.h) \ 137 | $(wildcard include/config/dynamic/debug.h) \ 138 | include/linux/init.h \ 139 | $(wildcard include/config/strict/kernel/rwx.h) \ 140 | include/linux/kern_levels.h \ 141 | include/linux/cache.h \ 142 | $(wildcard include/config/arch/has/cache/line/size.h) \ 143 | include/uapi/linux/kernel.h \ 144 | include/uapi/linux/sysinfo.h \ 145 | arch/x86/include/asm/cache.h \ 146 | $(wildcard include/config/x86/l1/cache/shift.h) \ 147 | $(wildcard include/config/x86/internode/cache/shift.h) \ 148 | $(wildcard include/config/x86/vsmp.h) \ 149 | include/linux/dynamic_debug.h \ 150 | $(wildcard include/config/jump/label.h) \ 151 | include/linux/jump_label.h \ 152 | arch/x86/include/asm/jump_label.h \ 153 | include/linux/build_bug.h \ 154 | include/linux/stat.h \ 155 | arch/x86/include/uapi/asm/stat.h \ 156 | include/uapi/linux/stat.h \ 157 | include/linux/time.h \ 158 | $(wildcard include/config/arch/uses/gettimeoffset.h) \ 159 | include/linux/seqlock.h \ 160 | $(wildcard include/config/debug/lock/alloc.h) \ 161 | include/linux/spinlock.h \ 162 | $(wildcard include/config/debug/spinlock.h) \ 163 | $(wildcard include/config/preempt.h) \ 164 | include/linux/preempt.h \ 165 | $(wildcard include/config/preempt/count.h) \ 166 | $(wildcard include/config/debug/preempt.h) \ 167 | $(wildcard include/config/preempt/tracer.h) \ 168 | $(wildcard include/config/preempt/notifiers.h) \ 169 | arch/x86/include/asm/preempt.h \ 170 | arch/x86/include/asm/percpu.h \ 171 | $(wildcard include/config/x86/64/smp.h) \ 172 | include/asm-generic/percpu.h \ 173 | $(wildcard include/config/have/setup/per/cpu/area.h) \ 174 | include/linux/threads.h \ 175 | $(wildcard include/config/nr/cpus.h) \ 176 | $(wildcard include/config/base/small.h) \ 177 | include/linux/percpu-defs.h \ 178 | $(wildcard include/config/debug/force/weak/per/cpu.h) \ 179 | $(wildcard include/config/virtualization.h) \ 180 | $(wildcard include/config/amd/mem/encrypt.h) \ 181 | include/linux/thread_info.h \ 182 | $(wildcard include/config/thread/info/in/task.h) \ 183 | $(wildcard include/config/debug/stack/usage.h) \ 184 | $(wildcard include/config/debug/kmemleak.h) \ 185 | $(wildcard include/config/have/arch/within/stack/frames.h) \ 186 | $(wildcard include/config/hardened/usercopy.h) \ 187 | include/linux/bug.h \ 188 | $(wildcard include/config/bug/on/data/corruption.h) \ 189 | arch/x86/include/asm/bug.h \ 190 | $(wildcard include/config/debug/bugverbose.h) \ 191 | include/asm-generic/bug.h \ 192 | $(wildcard include/config/bug.h) \ 193 | $(wildcard include/config/generic/bug/relative/pointers.h) \ 194 | include/linux/restart_block.h \ 195 | $(wildcard include/config/compat.h) \ 196 | arch/x86/include/asm/current.h \ 197 | arch/x86/include/asm/thread_info.h \ 198 | $(wildcard include/config/vm86.h) \ 199 | $(wildcard include/config/frame/pointer.h) \ 200 | $(wildcard include/config/ia32/emulation.h) \ 201 | arch/x86/include/asm/page.h \ 202 | arch/x86/include/asm/page_types.h \ 203 | $(wildcard include/config/physical/start.h) \ 204 | $(wildcard include/config/physical/align.h) \ 205 | include/linux/mem_encrypt.h \ 206 | $(wildcard include/config/arch/has/mem/encrypt.h) \ 207 | arch/x86/include/asm/mem_encrypt.h \ 208 | arch/x86/include/uapi/asm/bootparam.h \ 209 | include/linux/screen_info.h \ 210 | include/uapi/linux/screen_info.h \ 211 | include/linux/apm_bios.h \ 212 | include/uapi/linux/apm_bios.h \ 213 | include/uapi/linux/ioctl.h \ 214 | arch/x86/include/uapi/asm/ioctl.h \ 215 | include/asm-generic/ioctl.h \ 216 | include/uapi/asm-generic/ioctl.h \ 217 | include/linux/edd.h \ 218 | include/uapi/linux/edd.h \ 219 | arch/x86/include/asm/ist.h \ 220 | arch/x86/include/uapi/asm/ist.h \ 221 | include/video/edid.h \ 222 | $(wildcard include/config/x86.h) \ 223 | include/uapi/video/edid.h \ 224 | arch/x86/include/asm/page_64_types.h \ 225 | $(wildcard include/config/randomize/memory.h) \ 226 | $(wildcard include/config/randomize/base.h) \ 227 | arch/x86/include/asm/kaslr.h \ 228 | arch/x86/include/asm/page_64.h \ 229 | $(wildcard include/config/debug/virtual.h) \ 230 | $(wildcard include/config/flatmem.h) \ 231 | $(wildcard include/config/x86/vsyscall/emulation.h) \ 232 | include/linux/range.h \ 233 | include/asm-generic/memory_model.h \ 234 | $(wildcard include/config/discontigmem.h) \ 235 | $(wildcard include/config/sparsemem/vmemmap.h) \ 236 | $(wildcard include/config/sparsemem.h) \ 237 | include/linux/pfn.h \ 238 | include/asm-generic/getorder.h \ 239 | arch/x86/include/asm/cpufeature.h \ 240 | $(wildcard include/config/x86/feature/names.h) \ 241 | $(wildcard include/config/x86/fast/feature/tests.h) \ 242 | arch/x86/include/asm/processor.h \ 243 | $(wildcard include/config/cc/stackprotector.h) \ 244 | $(wildcard include/config/x86/debugctlmsr.h) \ 245 | $(wildcard include/config/cpu/sup/amd.h) \ 246 | $(wildcard include/config/xen.h) \ 247 | arch/x86/include/asm/processor-flags.h \ 248 | arch/x86/include/uapi/asm/processor-flags.h \ 249 | arch/x86/include/asm/math_emu.h \ 250 | arch/x86/include/asm/ptrace.h \ 251 | arch/x86/include/asm/segment.h \ 252 | $(wildcard include/config/xen/pv.h) \ 253 | $(wildcard include/config/x86/32/lazy/gs.h) \ 254 | arch/x86/include/uapi/asm/ptrace.h \ 255 | arch/x86/include/uapi/asm/ptrace-abi.h \ 256 | arch/x86/include/asm/paravirt_types.h \ 257 | $(wildcard include/config/pgtable/levels.h) \ 258 | $(wildcard include/config/paravirt/debug.h) \ 259 | arch/x86/include/asm/desc_defs.h \ 260 | arch/x86/include/asm/kmap_types.h \ 261 | $(wildcard include/config/debug/highmem.h) \ 262 | include/asm-generic/kmap_types.h \ 263 | arch/x86/include/asm/pgtable_types.h \ 264 | $(wildcard include/config/mem/soft/dirty.h) \ 265 | $(wildcard include/config/proc/fs.h) \ 266 | arch/x86/include/asm/pgtable_64_types.h \ 267 | arch/x86/include/asm/sparsemem.h \ 268 | include/asm-generic/pgtable-nop4d.h \ 269 | arch/x86/include/asm/nospec-branch.h \ 270 | $(wildcard include/config/retpoline.h) \ 271 | arch/x86/include/asm/alternative-asm.h \ 272 | arch/x86/include/asm/msr-index.h \ 273 | $(wildcard include/config/control.h) \ 274 | $(wildcard include/config/tdp/nominal.h) \ 275 | $(wildcard include/config/tdp/level/1.h) \ 276 | $(wildcard include/config/tdp/level/2.h) \ 277 | $(wildcard include/config/tdp/control.h) \ 278 | arch/x86/include/asm/spinlock_types.h \ 279 | $(wildcard include/config/paravirt/spinlocks.h) \ 280 | include/asm-generic/qspinlock_types.h \ 281 | include/asm-generic/qrwlock_types.h \ 282 | include/asm-generic/ptrace.h \ 283 | arch/x86/include/uapi/asm/sigcontext.h \ 284 | arch/x86/include/asm/msr.h \ 285 | arch/x86/include/asm/msr-index.h \ 286 | arch/x86/include/uapi/asm/errno.h \ 287 | include/uapi/asm-generic/errno.h \ 288 | include/uapi/asm-generic/errno-base.h \ 289 | arch/x86/include/asm/cpumask.h \ 290 | include/linux/cpumask.h \ 291 | $(wildcard include/config/cpumask/offstack.h) \ 292 | $(wildcard include/config/hotplug/cpu.h) \ 293 | $(wildcard include/config/debug/per/cpu/maps.h) \ 294 | include/linux/bitmap.h \ 295 | include/linux/string.h \ 296 | $(wildcard include/config/binary/printf.h) \ 297 | $(wildcard include/config/fortify/source.h) \ 298 | include/uapi/linux/string.h \ 299 | arch/x86/include/asm/string.h \ 300 | arch/x86/include/asm/string_64.h \ 301 | $(wildcard include/config/x86/mce.h) \ 302 | $(wildcard include/config/arch/has/uaccess/flushcache.h) \ 303 | arch/x86/include/uapi/asm/msr.h \ 304 | arch/x86/include/asm/atomic.h \ 305 | arch/x86/include/asm/cmpxchg.h \ 306 | arch/x86/include/asm/cmpxchg_64.h \ 307 | arch/x86/include/asm/atomic64_64.h \ 308 | include/linux/tracepoint-defs.h \ 309 | include/linux/atomic.h \ 310 | $(wildcard include/config/generic/atomic64.h) \ 311 | include/asm-generic/atomic-long.h \ 312 | include/linux/static_key.h \ 313 | arch/x86/include/asm/paravirt.h \ 314 | $(wildcard include/config/debug/entry.h) \ 315 | arch/x86/include/asm/frame.h \ 316 | arch/x86/include/asm/special_insns.h \ 317 | arch/x86/include/asm/fpu/types.h \ 318 | arch/x86/include/asm/unwind_hints.h \ 319 | arch/x86/include/asm/orc_types.h \ 320 | include/linux/personality.h \ 321 | include/uapi/linux/personality.h \ 322 | include/linux/math64.h \ 323 | $(wildcard include/config/arch/supports/int128.h) \ 324 | arch/x86/include/asm/div64.h \ 325 | include/asm-generic/div64.h \ 326 | include/linux/err.h \ 327 | include/linux/irqflags.h \ 328 | $(wildcard include/config/trace/irqflags.h) \ 329 | $(wildcard include/config/irqsoff/tracer.h) \ 330 | $(wildcard include/config/trace/irqflags/support.h) \ 331 | arch/x86/include/asm/irqflags.h \ 332 | include/linux/bottom_half.h \ 333 | include/linux/spinlock_types.h \ 334 | include/linux/lockdep.h \ 335 | $(wildcard include/config/lockdep.h) \ 336 | $(wildcard include/config/lock/stat.h) \ 337 | include/linux/rwlock_types.h \ 338 | arch/x86/include/asm/spinlock.h \ 339 | arch/x86/include/asm/qspinlock.h \ 340 | include/asm-generic/qspinlock.h \ 341 | arch/x86/include/asm/qrwlock.h \ 342 | include/asm-generic/qrwlock.h \ 343 | include/linux/rwlock.h \ 344 | include/linux/spinlock_api_smp.h \ 345 | $(wildcard include/config/inline/spin/lock.h) \ 346 | $(wildcard include/config/inline/spin/lock/bh.h) \ 347 | $(wildcard include/config/inline/spin/lock/irq.h) \ 348 | $(wildcard include/config/inline/spin/lock/irqsave.h) \ 349 | $(wildcard include/config/inline/spin/trylock.h) \ 350 | $(wildcard include/config/inline/spin/trylock/bh.h) \ 351 | $(wildcard include/config/uninline/spin/unlock.h) \ 352 | $(wildcard include/config/inline/spin/unlock/bh.h) \ 353 | $(wildcard include/config/inline/spin/unlock/irq.h) \ 354 | $(wildcard include/config/inline/spin/unlock/irqrestore.h) \ 355 | $(wildcard include/config/generic/lockbreak.h) \ 356 | include/linux/rwlock_api_smp.h \ 357 | $(wildcard include/config/inline/read/lock.h) \ 358 | $(wildcard include/config/inline/write/lock.h) \ 359 | $(wildcard include/config/inline/read/lock/bh.h) \ 360 | $(wildcard include/config/inline/write/lock/bh.h) \ 361 | $(wildcard include/config/inline/read/lock/irq.h) \ 362 | $(wildcard include/config/inline/write/lock/irq.h) \ 363 | $(wildcard include/config/inline/read/lock/irqsave.h) \ 364 | $(wildcard include/config/inline/write/lock/irqsave.h) \ 365 | $(wildcard include/config/inline/read/trylock.h) \ 366 | $(wildcard include/config/inline/write/trylock.h) \ 367 | $(wildcard include/config/inline/read/unlock.h) \ 368 | $(wildcard include/config/inline/write/unlock.h) \ 369 | $(wildcard include/config/inline/read/unlock/bh.h) \ 370 | $(wildcard include/config/inline/write/unlock/bh.h) \ 371 | $(wildcard include/config/inline/read/unlock/irq.h) \ 372 | $(wildcard include/config/inline/write/unlock/irq.h) \ 373 | $(wildcard include/config/inline/read/unlock/irqrestore.h) \ 374 | $(wildcard include/config/inline/write/unlock/irqrestore.h) \ 375 | include/linux/time64.h \ 376 | include/uapi/linux/time.h \ 377 | include/linux/time32.h \ 378 | include/linux/uidgid.h \ 379 | $(wildcard include/config/multiuser.h) \ 380 | $(wildcard include/config/user/ns.h) \ 381 | include/linux/highuid.h \ 382 | include/linux/kmod.h \ 383 | include/linux/umh.h \ 384 | include/linux/gfp.h \ 385 | $(wildcard include/config/highmem.h) \ 386 | $(wildcard include/config/zone/dma.h) \ 387 | $(wildcard include/config/zone/dma32.h) \ 388 | $(wildcard include/config/zone/device.h) \ 389 | $(wildcard include/config/numa.h) \ 390 | $(wildcard include/config/pm/sleep.h) \ 391 | $(wildcard include/config/memory/isolation.h) \ 392 | $(wildcard include/config/compaction.h) \ 393 | $(wildcard include/config/cma.h) \ 394 | include/linux/mmdebug.h \ 395 | $(wildcard include/config/debug/vm.h) \ 396 | $(wildcard include/config/debug/vm/pgflags.h) \ 397 | include/linux/mmzone.h \ 398 | $(wildcard include/config/force/max/zoneorder.h) \ 399 | $(wildcard include/config/zsmalloc.h) \ 400 | $(wildcard include/config/memcg.h) \ 401 | $(wildcard include/config/memory/hotplug.h) \ 402 | $(wildcard include/config/flat/node/mem/map.h) \ 403 | $(wildcard include/config/page/extension.h) \ 404 | $(wildcard include/config/no/bootmem.h) \ 405 | $(wildcard include/config/numa/balancing.h) \ 406 | $(wildcard include/config/deferred/struct/page/init.h) \ 407 | $(wildcard include/config/transparent/hugepage.h) \ 408 | $(wildcard include/config/have/memory/present.h) \ 409 | $(wildcard include/config/have/memoryless/nodes.h) \ 410 | $(wildcard include/config/need/node/memmap/size.h) \ 411 | $(wildcard include/config/have/memblock/node/map.h) \ 412 | $(wildcard include/config/need/multiple/nodes.h) \ 413 | $(wildcard include/config/have/arch/early/pfn/to/nid.h) \ 414 | $(wildcard include/config/sparsemem/extreme.h) \ 415 | $(wildcard include/config/memory/hotremove.h) \ 416 | $(wildcard include/config/have/arch/pfn/valid.h) \ 417 | $(wildcard include/config/holes/in/zone.h) \ 418 | $(wildcard include/config/arch/has/holes/memorymodel.h) \ 419 | include/linux/wait.h \ 420 | include/uapi/linux/wait.h \ 421 | include/linux/numa.h \ 422 | $(wildcard include/config/nodes/shift.h) \ 423 | include/linux/nodemask.h \ 424 | include/linux/pageblock-flags.h \ 425 | $(wildcard include/config/hugetlb/page.h) \ 426 | $(wildcard include/config/hugetlb/page/size/variable.h) \ 427 | include/linux/page-flags-layout.h \ 428 | include/generated/bounds.h \ 429 | include/linux/memory_hotplug.h \ 430 | $(wildcard include/config/arch/has/add/pages.h) \ 431 | $(wildcard include/config/have/arch/nodedata/extension.h) \ 432 | $(wildcard include/config/have/bootmem/info/node.h) \ 433 | include/linux/notifier.h \ 434 | include/linux/errno.h \ 435 | include/uapi/linux/errno.h \ 436 | include/linux/mutex.h \ 437 | $(wildcard include/config/mutex/spin/on/owner.h) \ 438 | $(wildcard include/config/debug/mutexes.h) \ 439 | include/linux/osq_lock.h \ 440 | include/linux/debug_locks.h \ 441 | $(wildcard include/config/debug/locking/api/selftests.h) \ 442 | include/linux/rwsem.h \ 443 | $(wildcard include/config/rwsem/spin/on/owner.h) \ 444 | $(wildcard include/config/rwsem/generic/spinlock.h) \ 445 | arch/x86/include/asm/rwsem.h \ 446 | include/linux/srcu.h \ 447 | $(wildcard include/config/tiny/srcu.h) \ 448 | $(wildcard include/config/tree/srcu.h) \ 449 | $(wildcard include/config/srcu.h) \ 450 | include/linux/rcupdate.h \ 451 | $(wildcard include/config/preempt/rcu.h) \ 452 | $(wildcard include/config/rcu/stall/common.h) \ 453 | $(wildcard include/config/no/hz/full.h) \ 454 | $(wildcard include/config/rcu/nocb/cpu.h) \ 455 | $(wildcard include/config/tasks/rcu.h) \ 456 | $(wildcard include/config/tree/rcu.h) \ 457 | $(wildcard include/config/tiny/rcu.h) \ 458 | $(wildcard include/config/debug/objects/rcu/head.h) \ 459 | $(wildcard include/config/prove/rcu.h) \ 460 | $(wildcard include/config/rcu/boost.h) \ 461 | $(wildcard include/config/arch/weak/release/acquire.h) \ 462 | include/linux/rcutree.h \ 463 | include/linux/workqueue.h \ 464 | $(wildcard include/config/debug/objects/work.h) \ 465 | $(wildcard include/config/freezer.h) \ 466 | $(wildcard include/config/wq/watchdog.h) \ 467 | include/linux/timer.h \ 468 | $(wildcard include/config/debug/objects/timers.h) \ 469 | $(wildcard include/config/no/hz/common.h) \ 470 | include/linux/ktime.h \ 471 | include/linux/jiffies.h \ 472 | include/linux/timex.h \ 473 | include/uapi/linux/timex.h \ 474 | include/uapi/linux/param.h \ 475 | arch/x86/include/uapi/asm/param.h \ 476 | include/asm-generic/param.h \ 477 | $(wildcard include/config/hz.h) \ 478 | include/uapi/asm-generic/param.h \ 479 | arch/x86/include/asm/timex.h \ 480 | arch/x86/include/asm/tsc.h \ 481 | $(wildcard include/config/x86/tsc.h) \ 482 | include/generated/timeconst.h \ 483 | include/linux/timekeeping.h \ 484 | include/linux/timekeeping32.h \ 485 | include/linux/debugobjects.h \ 486 | $(wildcard include/config/debug/objects.h) \ 487 | $(wildcard include/config/debug/objects/free.h) \ 488 | include/linux/rcu_segcblist.h \ 489 | include/linux/srcutree.h \ 490 | include/linux/rcu_node_tree.h \ 491 | $(wildcard include/config/rcu/fanout.h) \ 492 | $(wildcard include/config/rcu/fanout/leaf.h) \ 493 | include/linux/completion.h \ 494 | arch/x86/include/asm/mmzone.h \ 495 | arch/x86/include/asm/mmzone_64.h \ 496 | arch/x86/include/asm/smp.h \ 497 | $(wildcard include/config/x86/local/apic.h) \ 498 | $(wildcard include/config/x86/io/apic.h) \ 499 | $(wildcard include/config/debug/nmi/selftest.h) \ 500 | arch/x86/include/asm/mpspec.h \ 501 | $(wildcard include/config/eisa.h) \ 502 | $(wildcard include/config/x86/mpparse.h) \ 503 | arch/x86/include/asm/mpspec_def.h \ 504 | arch/x86/include/asm/x86_init.h \ 505 | arch/x86/include/asm/apicdef.h \ 506 | arch/x86/include/asm/apic.h \ 507 | $(wildcard include/config/x86/x2apic.h) \ 508 | arch/x86/include/asm/fixmap.h \ 509 | $(wildcard include/config/provide/ohci1394/dma/init.h) \ 510 | $(wildcard include/config/pci/mmconfig.h) \ 511 | $(wildcard include/config/x86/intel/mid.h) \ 512 | $(wildcard include/config/acpi/apei/ghes.h) \ 513 | $(wildcard include/config/intel/txt.h) \ 514 | arch/x86/include/asm/acpi.h \ 515 | $(wildcard include/config/acpi/apei.h) \ 516 | $(wildcard include/config/acpi.h) \ 517 | $(wildcard include/config/acpi/numa.h) \ 518 | include/acpi/pdc_intel.h \ 519 | arch/x86/include/asm/numa.h \ 520 | $(wildcard include/config/numa/emu.h) \ 521 | arch/x86/include/asm/topology.h \ 522 | $(wildcard include/config/sched/mc/prio.h) \ 523 | include/asm-generic/topology.h \ 524 | arch/x86/include/asm/mmu.h \ 525 | $(wildcard include/config/modify/ldt/syscall.h) \ 526 | arch/x86/include/asm/realmode.h \ 527 | $(wildcard include/config/acpi/sleep.h) \ 528 | arch/x86/include/asm/io.h \ 529 | $(wildcard include/config/mtrr.h) \ 530 | $(wildcard include/config/x86/pat.h) \ 531 | arch/x86/include/generated/asm/early_ioremap.h \ 532 | include/asm-generic/early_ioremap.h \ 533 | $(wildcard include/config/generic/early/ioremap.h) \ 534 | include/asm-generic/iomap.h \ 535 | $(wildcard include/config/has/ioport/map.h) \ 536 | $(wildcard include/config/pci.h) \ 537 | $(wildcard include/config/generic/iomap.h) \ 538 | include/asm-generic/pci_iomap.h \ 539 | $(wildcard include/config/no/generic/pci/ioport/map.h) \ 540 | $(wildcard include/config/generic/pci/iomap.h) \ 541 | include/xen/xen.h \ 542 | $(wildcard include/config/xen/pvh.h) \ 543 | $(wildcard include/config/xen/dom0.h) \ 544 | include/xen/interface/xen.h \ 545 | arch/x86/include/asm/xen/interface.h \ 546 | arch/x86/include/asm/xen/interface_64.h \ 547 | arch/x86/include/asm/pvclock-abi.h \ 548 | arch/x86/include/asm/xen/hypervisor.h \ 549 | include/asm-generic/io.h \ 550 | $(wildcard include/config/virt/to/bus.h) \ 551 | include/linux/logic_pio.h \ 552 | $(wildcard include/config/indirect/pio.h) \ 553 | include/linux/fwnode.h \ 554 | include/linux/vmalloc.h \ 555 | include/linux/llist.h \ 556 | $(wildcard include/config/arch/have/nmi/safe/cmpxchg.h) \ 557 | include/linux/rbtree.h \ 558 | arch/x86/include/uapi/asm/vsyscall.h \ 559 | include/asm-generic/fixmap.h \ 560 | arch/x86/include/asm/hardirq.h \ 561 | $(wildcard include/config/kvm/intel.h) \ 562 | $(wildcard include/config/have/kvm.h) \ 563 | $(wildcard include/config/x86/thermal/vector.h) \ 564 | $(wildcard include/config/x86/mce/threshold.h) \ 565 | $(wildcard include/config/x86/mce/amd.h) \ 566 | $(wildcard include/config/hyperv.h) \ 567 | arch/x86/include/asm/io_apic.h \ 568 | arch/x86/include/asm/irq_vectors.h \ 569 | $(wildcard include/config/pci/msi.h) \ 570 | include/linux/topology.h \ 571 | $(wildcard include/config/use/percpu/numa/node/id.h) \ 572 | $(wildcard include/config/sched/smt.h) \ 573 | include/linux/smp.h \ 574 | $(wildcard include/config/up/late/init.h) \ 575 | include/linux/percpu.h \ 576 | $(wildcard include/config/need/per/cpu/embed/first/chunk.h) \ 577 | $(wildcard include/config/need/per/cpu/page/first/chunk.h) \ 578 | include/linux/sysctl.h \ 579 | $(wildcard include/config/sysctl.h) \ 580 | include/uapi/linux/sysctl.h \ 581 | include/linux/elf.h \ 582 | arch/x86/include/asm/elf.h \ 583 | $(wildcard include/config/x86/x32/abi.h) \ 584 | arch/x86/include/asm/user.h \ 585 | arch/x86/include/asm/user_64.h \ 586 | arch/x86/include/uapi/asm/auxvec.h \ 587 | arch/x86/include/asm/vdso.h \ 588 | $(wildcard include/config/x86/x32.h) \ 589 | include/linux/mm_types.h \ 590 | $(wildcard include/config/have/cmpxchg/double.h) \ 591 | $(wildcard include/config/have/aligned/struct/page.h) \ 592 | $(wildcard include/config/userfaultfd.h) \ 593 | $(wildcard include/config/have/arch/compat/mmap/bases.h) \ 594 | $(wildcard include/config/membarrier.h) \ 595 | $(wildcard include/config/aio.h) \ 596 | $(wildcard include/config/mmu/notifier.h) \ 597 | $(wildcard include/config/arch/want/batched/unmap/tlb/flush.h) \ 598 | $(wildcard include/config/hmm.h) \ 599 | include/linux/mm_types_task.h \ 600 | $(wildcard include/config/split/ptlock/cpus.h) \ 601 | $(wildcard include/config/arch/enable/split/pmd/ptlock.h) \ 602 | arch/x86/include/asm/tlbbatch.h \ 603 | include/linux/auxvec.h \ 604 | include/uapi/linux/auxvec.h \ 605 | include/linux/uprobes.h \ 606 | $(wildcard include/config/uprobes.h) \ 607 | arch/x86/include/asm/uprobes.h \ 608 | include/uapi/linux/elf.h \ 609 | include/uapi/linux/elf-em.h \ 610 | include/linux/kobject.h \ 611 | $(wildcard include/config/uevent/helper.h) \ 612 | $(wildcard include/config/debug/kobject/release.h) \ 613 | include/linux/sysfs.h \ 614 | include/linux/kernfs.h \ 615 | $(wildcard include/config/kernfs.h) \ 616 | include/linux/idr.h \ 617 | include/linux/radix-tree.h \ 618 | $(wildcard include/config/radix/tree/multiorder.h) \ 619 | include/linux/kobject_ns.h \ 620 | include/linux/kref.h \ 621 | include/linux/refcount.h \ 622 | $(wildcard include/config/refcount/full.h) \ 623 | arch/x86/include/asm/refcount.h \ 624 | include/linux/moduleparam.h \ 625 | $(wildcard include/config/alpha.h) \ 626 | $(wildcard include/config/ia64.h) \ 627 | $(wildcard include/config/ppc64.h) \ 628 | include/linux/rbtree_latch.h \ 629 | arch/x86/include/asm/module.h \ 630 | $(wildcard include/config/unwinder/orc.h) \ 631 | $(wildcard include/config/m486.h) \ 632 | $(wildcard include/config/m586.h) \ 633 | $(wildcard include/config/m586tsc.h) \ 634 | $(wildcard include/config/m586mmx.h) \ 635 | $(wildcard include/config/mcore2.h) \ 636 | $(wildcard include/config/m686.h) \ 637 | $(wildcard include/config/mpentiumii.h) \ 638 | $(wildcard include/config/mpentiumiii.h) \ 639 | $(wildcard include/config/mpentiumm.h) \ 640 | $(wildcard include/config/mpentium4.h) \ 641 | $(wildcard include/config/mk6.h) \ 642 | $(wildcard include/config/mk8.h) \ 643 | $(wildcard include/config/melan.h) \ 644 | $(wildcard include/config/mcrusoe.h) \ 645 | $(wildcard include/config/mefficeon.h) \ 646 | $(wildcard include/config/mwinchipc6.h) \ 647 | $(wildcard include/config/mwinchip3d.h) \ 648 | $(wildcard include/config/mcyrixiii.h) \ 649 | $(wildcard include/config/mviac3/2.h) \ 650 | $(wildcard include/config/mviac7.h) \ 651 | $(wildcard include/config/mgeodegx1.h) \ 652 | $(wildcard include/config/mgeode/lx.h) \ 653 | include/asm-generic/module.h \ 654 | $(wildcard include/config/have/mod/arch/specific.h) \ 655 | $(wildcard include/config/modules/use/elf/rel.h) \ 656 | $(wildcard include/config/modules/use/elf/rela.h) \ 657 | arch/x86/include/asm/orc_types.h \ 658 | /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop_packet.h \ 659 | 660 | /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o: $(deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o) 661 | 662 | $(deps_/home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o): 663 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step1/main.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step1/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step1/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "3B2D768608D090800D8AF38"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step1/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step1/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | 14 | #include "drop_packet.h" 15 | 16 | static int drop_packet_init(void) 17 | { 18 | printk("drop-packet loaded.\n"); 19 | 20 | return 0; 21 | } 22 | 23 | static void drop_packet_exit(void) 24 | { 25 | printk("drop-packet unloaded.\n"); 26 | } 27 | 28 | module_init(drop_packet_init) 29 | module_exit(drop_packet_exit) 30 | 31 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 32 | MODULE_AUTHOR("Baoyou Xie "); 33 | MODULE_LICENSE("GPL v2"); 34 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step1/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step1/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step1/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step2/main.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step2/main.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step2/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step2/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "B5656D092B46683305B23FE"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step2/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step2/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | 17 | #include "drop_packet.h" 18 | 19 | static unsigned long drop_packet_activated; 20 | 21 | static int activate_drop_packet(void) 22 | { 23 | return 1; 24 | } 25 | 26 | static void deactivate_drop_packet(void) 27 | { 28 | } 29 | 30 | static int drop_packet_show(struct seq_file *m, void *v) 31 | { 32 | seq_printf(m, "settings:\n"); 33 | seq_printf(m, " activated: %s\n", drop_packet_activated ? "y" : "N"); 34 | 35 | return 0; 36 | } 37 | 38 | static int drop_packet_open(struct inode *inode, struct file *filp) 39 | { 40 | return single_open(filp, drop_packet_show, NULL); 41 | } 42 | 43 | static ssize_t drop_packet_write(struct file *file, 44 | const char __user *buf, size_t count, loff_t *offs) 45 | { 46 | int ret; 47 | char cmd[255]; 48 | char chr[255]; 49 | 50 | if (count < 1 || *offs) 51 | return -EINVAL; 52 | 53 | if (copy_from_user(chr, buf, 255)) 54 | return -EFAULT; 55 | 56 | ret = sscanf(chr, "%255s", cmd); 57 | if (ret <= 0) 58 | return -EINVAL; 59 | 60 | if (strcmp(cmd, "activate") == 0) { 61 | if (!drop_packet_activated) 62 | drop_packet_activated = activate_drop_packet(); 63 | } else if (strcmp(cmd, "deactivate") == 0) { 64 | if (drop_packet_activated) 65 | deactivate_drop_packet(); 66 | drop_packet_activated = 0; 67 | } 68 | 69 | return count; 70 | } 71 | 72 | const struct file_operations drop_packet_fops = { 73 | .open = drop_packet_open, 74 | .read = seq_read, 75 | .llseek = seq_lseek, 76 | .write = drop_packet_write, 77 | .release = single_release, 78 | }; 79 | 80 | static int drop_packet_init(void) 81 | { 82 | int ret; 83 | struct proc_dir_entry *pe; 84 | 85 | proc_mkdir("mooc", NULL); 86 | proc_mkdir("mooc/net", NULL); 87 | 88 | ret = -ENOMEM; 89 | pe = proc_create("mooc/net/drop-packet", 90 | S_IFREG | 0644, 91 | NULL, 92 | &drop_packet_fops); 93 | if (!pe) 94 | goto err_proc; 95 | 96 | printk("drop-packet loaded.\n"); 97 | 98 | return 0; 99 | 100 | err_proc: 101 | return ret; 102 | } 103 | 104 | static void drop_packet_exit(void) 105 | { 106 | remove_proc_entry("mooc/net/drop-packet", NULL); 107 | remove_proc_entry("mooc/net", NULL); 108 | remove_proc_entry("mooc", NULL); 109 | 110 | printk("drop-packet unloaded.\n"); 111 | } 112 | 113 | module_init(drop_packet_init) 114 | module_exit(drop_packet_exit) 115 | 116 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 117 | MODULE_AUTHOR("Baoyou Xie "); 118 | MODULE_LICENSE("GPL v2"); 119 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step2/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step2/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step2/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/misc.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step3/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step3/misc.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o misc.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "0535A6390B9A0E93BB3D81A"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | #include 11 | 12 | int hook_kprobe(struct kprobe *kp, const char *name, 13 | kprobe_pre_handler_t pre, kprobe_post_handler_t post); 14 | void unhook_kprobe(struct kprobe *kp); 15 | int hook_tracepoint(const char *name, void *probe, void *data); 16 | int unhook_tracepoint(const char *name, void *probe, void *data); 17 | 18 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | 18 | #include "drop_packet.h" 19 | 20 | static unsigned long drop_packet_activated; 21 | 22 | static struct kprobe kprobe_eth_type_trans; 23 | static struct kprobe kprobe_napi_gro_receive; 24 | static struct kprobe kprobe___netif_receive_skb_core; 25 | static struct kprobe kprobe_tcp_v4_rcv; 26 | static struct kprobe kprobe_dev_queue_xmit; 27 | 28 | static void trace_net_dev_xmit_hit(void *ignore, struct sk_buff *skb, 29 | int rc, struct net_device *dev, unsigned int skb_len) 30 | { 31 | printk("xby-debug in trace_net_dev_xmit_hit\n"); 32 | } 33 | 34 | static int kprobe_dev_queue_xmit_pre(struct kprobe *p, struct pt_regs *regs) 35 | { 36 | printk("xby-debug in kprobe_dev_queue_xmit_pre\n"); 37 | 38 | return 0; 39 | } 40 | 41 | static int kprobe_eth_type_trans_pre(struct kprobe *p, struct pt_regs *regs) 42 | { 43 | return 0; 44 | } 45 | 46 | static int kprobe_napi_gro_receive_pre(struct kprobe *p, struct pt_regs *regs) 47 | { 48 | return 0; 49 | } 50 | 51 | static int kprobe___netif_receive_skb_core_pre(struct kprobe *p, struct pt_regs *regs) 52 | { 53 | return 0; 54 | } 55 | 56 | static int kprobe_tcp_v4_rcv_pre(struct kprobe *p, struct pt_regs *regs) 57 | { 58 | return 0; 59 | } 60 | 61 | static int activate_drop_packet(void) 62 | { 63 | hook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 64 | hook_kprobe(&kprobe_dev_queue_xmit, "dev_queue_xmit", 65 | kprobe_dev_queue_xmit_pre, NULL); 66 | hook_kprobe(&kprobe_eth_type_trans, "eth_type_trans", 67 | kprobe_eth_type_trans_pre, NULL); 68 | hook_kprobe(&kprobe_napi_gro_receive, "napi_gro_receive", 69 | kprobe_napi_gro_receive_pre, NULL); 70 | hook_kprobe(&kprobe___netif_receive_skb_core, "__netif_receive_skb_core", 71 | kprobe___netif_receive_skb_core_pre, NULL); 72 | hook_kprobe(&kprobe_tcp_v4_rcv, "tcp_v4_rcv", 73 | kprobe_tcp_v4_rcv_pre, NULL); 74 | 75 | return 1; 76 | } 77 | 78 | static void deactivate_drop_packet(void) 79 | { 80 | unhook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 81 | unhook_kprobe(&kprobe_dev_queue_xmit); 82 | unhook_kprobe(&kprobe_eth_type_trans); 83 | unhook_kprobe(&kprobe_napi_gro_receive); 84 | unhook_kprobe(&kprobe___netif_receive_skb_core); 85 | unhook_kprobe(&kprobe_tcp_v4_rcv); 86 | } 87 | 88 | static int drop_packet_show(struct seq_file *m, void *v) 89 | { 90 | seq_printf(m, "settings:\n"); 91 | seq_printf(m, " activated: %s\n", drop_packet_activated ? "y" : "N"); 92 | 93 | return 0; 94 | } 95 | 96 | static int drop_packet_open(struct inode *inode, struct file *filp) 97 | { 98 | return single_open(filp, drop_packet_show, NULL); 99 | } 100 | 101 | static ssize_t drop_packet_write(struct file *file, 102 | const char __user *buf, size_t count, loff_t *offs) 103 | { 104 | int ret; 105 | char cmd[255]; 106 | char chr[255]; 107 | 108 | if (count < 1 || *offs) 109 | return -EINVAL; 110 | 111 | if (copy_from_user(chr, buf, 255)) 112 | return -EFAULT; 113 | 114 | ret = sscanf(chr, "%255s", cmd); 115 | if (ret <= 0) 116 | return -EINVAL; 117 | 118 | if (strcmp(cmd, "activate") == 0) { 119 | if (!drop_packet_activated) 120 | drop_packet_activated = activate_drop_packet(); 121 | } else if (strcmp(cmd, "deactivate") == 0) { 122 | if (drop_packet_activated) 123 | deactivate_drop_packet(); 124 | drop_packet_activated = 0; 125 | } 126 | 127 | return count; 128 | } 129 | 130 | const struct file_operations drop_packet_fops = { 131 | .open = drop_packet_open, 132 | .read = seq_read, 133 | .llseek = seq_lseek, 134 | .write = drop_packet_write, 135 | .release = single_release, 136 | }; 137 | 138 | static int drop_packet_init(void) 139 | { 140 | int ret; 141 | struct proc_dir_entry *pe; 142 | 143 | proc_mkdir("mooc", NULL); 144 | proc_mkdir("mooc/net", NULL); 145 | 146 | ret = -ENOMEM; 147 | pe = proc_create("mooc/net/drop-packet", 148 | S_IFREG | 0644, 149 | NULL, 150 | &drop_packet_fops); 151 | if (!pe) 152 | goto err_proc; 153 | 154 | printk("drop-packet loaded.\n"); 155 | 156 | return 0; 157 | 158 | err_proc: 159 | return ret; 160 | } 161 | 162 | static void drop_packet_exit(void) 163 | { 164 | remove_proc_entry("mooc/net/drop-packet", NULL); 165 | remove_proc_entry("mooc/net", NULL); 166 | remove_proc_entry("mooc", NULL); 167 | 168 | if (drop_packet_activated) 169 | deactivate_drop_packet(); 170 | drop_packet_activated = 0; 171 | 172 | printk("drop-packet unloaded.\n"); 173 | } 174 | 175 | module_init(drop_packet_init) 176 | module_exit(drop_packet_exit) 177 | 178 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 179 | MODULE_AUTHOR("Baoyou Xie "); 180 | MODULE_LICENSE("GPL v2"); 181 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/misc.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | #include "drop_packet.h" 6 | 7 | int hook_kprobe(struct kprobe *kp, const char *name, 8 | kprobe_pre_handler_t pre, kprobe_post_handler_t post) 9 | { 10 | kprobe_opcode_t *addr; 11 | 12 | if (!name || strlen(name) >= 255) 13 | return -EINVAL; 14 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); 15 | if (!addr) 16 | return -EINVAL; 17 | 18 | memset(kp, 0, sizeof(struct kprobe)); 19 | kp->symbol_name = name; 20 | kp->pre_handler = pre; 21 | kp->post_handler = post; 22 | 23 | register_kprobe(kp); 24 | 25 | return 0; 26 | } 27 | 28 | void unhook_kprobe(struct kprobe *kp) 29 | { 30 | unregister_kprobe(kp); 31 | memset(kp, 0, sizeof(struct kprobe)); 32 | } 33 | 34 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) 35 | int hook_tracepoint(const char *name, void *probe, void *data) 36 | { 37 | return tracepoint_probe_register(name, probe); 38 | } 39 | 40 | int unhook_tracepoint(const char *name, void *probe, void *data) 41 | { 42 | return tracepoint_probe_unregister(name, probe); 43 | } 44 | #elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) 45 | int hook_tracepoint(const char *name, void *probe, void *data) 46 | { 47 | return tracepoint_probe_register(name, probe, data); 48 | } 49 | 50 | int unhook_tracepoint(const char *name, void *probe, void *data) 51 | { 52 | return tracepoint_probe_unregister(name, probe, data); 53 | } 54 | #else 55 | static struct tracepoint *tp_ret; 56 | static void probe_tracepoint(struct tracepoint *tp, void *priv) 57 | { 58 | char *n = priv; 59 | 60 | if (strcmp(tp->name, n) == 0) 61 | tp_ret = tp; 62 | } 63 | 64 | static struct tracepoint *find_tracepoint(const char *name) 65 | { 66 | tp_ret = NULL; 67 | for_each_kernel_tracepoint(probe_tracepoint, (void *)name); 68 | 69 | return tp_ret; 70 | } 71 | 72 | int hook_tracepoint(const char *name, void *probe, void *data) 73 | { 74 | struct tracepoint *tp; 75 | 76 | tp = find_tracepoint(name); 77 | if (!tp) 78 | return 0; 79 | 80 | return tracepoint_probe_register(tp, probe, data); 81 | } 82 | 83 | int unhook_tracepoint(const char *name, void *probe, void *data) 84 | { 85 | struct tracepoint *tp; 86 | 87 | tp = find_tracepoint(name); 88 | if (!tp) 89 | return 0; 90 | 91 | return tracepoint_probe_unregister(tp, probe, data); 92 | } 93 | #endif 94 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/misc.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step3/misc.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step3/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step3/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/misc.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step4/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step4/misc.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o misc.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "184E169951C3296D9DE84C4"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | #include 11 | 12 | int hook_kprobe(struct kprobe *kp, const char *name, 13 | kprobe_pre_handler_t pre, kprobe_post_handler_t post); 14 | void unhook_kprobe(struct kprobe *kp); 15 | int hook_tracepoint(const char *name, void *probe, void *data); 16 | int unhook_tracepoint(const char *name, void *probe, void *data); 17 | 18 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | 21 | #include "drop_packet.h" 22 | 23 | static unsigned long drop_packet_activated; 24 | 25 | static struct kprobe kprobe_eth_type_trans; 26 | static struct kprobe kprobe_napi_gro_receive; 27 | static struct kprobe kprobe___netif_receive_skb_core; 28 | static struct kprobe kprobe_tcp_v4_rcv; 29 | 30 | enum packet_footprint 31 | { 32 | ETH_RECV, 33 | GRO_RECV, 34 | RECV_SKB, 35 | TCP_V4_RCV, 36 | SEND_SKB, 37 | TRACK_COUNT, 38 | }; 39 | 40 | static void trace_packet(const struct sk_buff *skb, 41 | const struct iphdr *iphdr, enum packet_footprint fp) 42 | { 43 | unsigned int source = iphdr->saddr; 44 | unsigned int dest = iphdr->daddr; 45 | unsigned char *saddr = (void *)&source; 46 | unsigned char *daddr = (void *)&dest; 47 | 48 | printk("Source IP：%u.%u.%u.%u, Dest IP：%u.%u.%u.%u, fp: %d\n", 49 | saddr[0], saddr[1], saddr[2], saddr[3], 50 | daddr[0], daddr[1], daddr[2], daddr[3], fp); 51 | } 52 | 53 | static void trace_net_dev_xmit_hit(void *ignore, struct sk_buff *skb, 54 | int rc, struct net_device *dev, unsigned int skb_len) 55 | { 56 | struct iphdr *iphdr; 57 | 58 | if (!drop_packet_activated) 59 | return; 60 | 61 | if (rc != NETDEV_TX_OK) 62 | return; 63 | 64 | iphdr = ip_hdr(skb); 65 | trace_packet(skb, iphdr, SEND_SKB); 66 | } 67 | 68 | static int kprobe_eth_type_trans_pre(struct kprobe *p, struct pt_regs *regs) 69 | { 70 | struct sk_buff *skb = (void *)regs->di; 71 | struct iphdr *iphdr; 72 | 73 | if (!drop_packet_activated) 74 | return 0; 75 | 76 | iphdr = (struct iphdr *)(skb->data + ETH_HLEN); 77 | trace_packet(skb, iphdr, ETH_RECV); 78 | 79 | return 0; 80 | } 81 | 82 | static int kprobe_napi_gro_receive_pre(struct kprobe *p, struct pt_regs *regs) 83 | { 84 | struct sk_buff *skb = (void *)regs->si; 85 | struct iphdr *iphdr; 86 | 87 | if (!drop_packet_activated) 88 | return 0; 89 | 90 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 91 | return 0; 92 | 93 | iphdr = (struct iphdr *)skb->data; 94 | trace_packet(skb, iphdr, GRO_RECV); 95 | 96 | return 0; 97 | } 98 | 99 | static int kprobe___netif_receive_skb_core_pre(struct kprobe *p, struct pt_regs *regs) 100 | { 101 | struct sk_buff *skb = (void *)regs->di; 102 | struct iphdr *iphdr; 103 | 104 | if (!drop_packet_activated) 105 | return 0; 106 | 107 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 108 | return 0; 109 | 110 | iphdr = (struct iphdr *)skb->data; 111 | trace_packet(skb, iphdr, RECV_SKB); 112 | 113 | return 0; 114 | } 115 | 116 | static int kprobe_tcp_v4_rcv_pre(struct kprobe *p, struct pt_regs *regs) 117 | { 118 | struct sk_buff *skb = (void *)regs->di; 119 | struct iphdr *iphdr; 120 | 121 | if (!drop_packet_activated) 122 | return 0; 123 | 124 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 125 | return 0; 126 | 127 | iphdr = ip_hdr(skb); 128 | trace_packet(skb, iphdr, TCP_V4_RCV); 129 | 130 | return 0; 131 | } 132 | 133 | static int activate_drop_packet(void) 134 | { 135 | hook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 136 | hook_kprobe(&kprobe_eth_type_trans, "eth_type_trans", 137 | kprobe_eth_type_trans_pre, NULL); 138 | hook_kprobe(&kprobe_napi_gro_receive, "napi_gro_receive", 139 | kprobe_napi_gro_receive_pre, NULL); 140 | hook_kprobe(&kprobe___netif_receive_skb_core, "__netif_receive_skb_core", 141 | kprobe___netif_receive_skb_core_pre, NULL); 142 | hook_kprobe(&kprobe_tcp_v4_rcv, "tcp_v4_rcv", 143 | kprobe_tcp_v4_rcv_pre, NULL); 144 | 145 | return 1; 146 | } 147 | 148 | static void deactivate_drop_packet(void) 149 | { 150 | unhook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 151 | unhook_kprobe(&kprobe_eth_type_trans); 152 | unhook_kprobe(&kprobe_napi_gro_receive); 153 | unhook_kprobe(&kprobe___netif_receive_skb_core); 154 | unhook_kprobe(&kprobe_tcp_v4_rcv); 155 | } 156 | 157 | static int drop_packet_show(struct seq_file *m, void *v) 158 | { 159 | seq_printf(m, "settings:\n"); 160 | seq_printf(m, " activated: %s\n", drop_packet_activated ? "y" : "N"); 161 | 162 | return 0; 163 | } 164 | 165 | static int drop_packet_open(struct inode *inode, struct file *filp) 166 | { 167 | return single_open(filp, drop_packet_show, NULL); 168 | } 169 | 170 | static ssize_t drop_packet_write(struct file *file, 171 | const char __user *buf, size_t count, loff_t *offs) 172 | { 173 | int ret; 174 | char cmd[255]; 175 | char chr[255]; 176 | 177 | if (count < 1 || *offs) 178 | return -EINVAL; 179 | 180 | if (copy_from_user(chr, buf, 255)) 181 | return -EFAULT; 182 | 183 | ret = sscanf(chr, "%255s", cmd); 184 | if (ret <= 0) 185 | return -EINVAL; 186 | 187 | if (strcmp(cmd, "activate") == 0) { 188 | if (!drop_packet_activated) 189 | drop_packet_activated = activate_drop_packet(); 190 | } else if (strcmp(cmd, "deactivate") == 0) { 191 | if (drop_packet_activated) 192 | deactivate_drop_packet(); 193 | drop_packet_activated = 0; 194 | } 195 | 196 | return count; 197 | } 198 | 199 | const struct file_operations drop_packet_fops = { 200 | .open = drop_packet_open, 201 | .read = seq_read, 202 | .llseek = seq_lseek, 203 | .write = drop_packet_write, 204 | .release = single_release, 205 | }; 206 | 207 | static int drop_packet_init(void) 208 | { 209 | int ret; 210 | struct proc_dir_entry *pe; 211 | 212 | proc_mkdir("mooc", NULL); 213 | proc_mkdir("mooc/net", NULL); 214 | 215 | ret = -ENOMEM; 216 | pe = proc_create("mooc/net/drop-packet", 217 | S_IFREG | 0644, 218 | NULL, 219 | &drop_packet_fops); 220 | if (!pe) 221 | goto err_proc; 222 | 223 | printk("drop-packet loaded.\n"); 224 | 225 | return 0; 226 | 227 | err_proc: 228 | return ret; 229 | } 230 | 231 | static void drop_packet_exit(void) 232 | { 233 | remove_proc_entry("mooc/net/drop-packet", NULL); 234 | remove_proc_entry("mooc/net", NULL); 235 | remove_proc_entry("mooc", NULL); 236 | 237 | if (drop_packet_activated) 238 | deactivate_drop_packet(); 239 | drop_packet_activated = 0; 240 | 241 | printk("drop-packet unloaded.\n"); 242 | } 243 | 244 | module_init(drop_packet_init) 245 | module_exit(drop_packet_exit) 246 | 247 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 248 | MODULE_AUTHOR("Baoyou Xie "); 249 | MODULE_LICENSE("GPL v2"); 250 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/misc.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | #include "drop_packet.h" 6 | 7 | int hook_kprobe(struct kprobe *kp, const char *name, 8 | kprobe_pre_handler_t pre, kprobe_post_handler_t post) 9 | { 10 | kprobe_opcode_t *addr; 11 | 12 | if (!name || strlen(name) >= 255) 13 | return -EINVAL; 14 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); 15 | if (!addr) 16 | return -EINVAL; 17 | 18 | memset(kp, 0, sizeof(struct kprobe)); 19 | kp->symbol_name = name; 20 | kp->pre_handler = pre; 21 | kp->post_handler = post; 22 | 23 | register_kprobe(kp); 24 | 25 | return 0; 26 | } 27 | 28 | void unhook_kprobe(struct kprobe *kp) 29 | { 30 | unregister_kprobe(kp); 31 | memset(kp, 0, sizeof(struct kprobe)); 32 | } 33 | 34 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) 35 | int hook_tracepoint(const char *name, void *probe, void *data) 36 | { 37 | return tracepoint_probe_register(name, probe); 38 | } 39 | 40 | int unhook_tracepoint(const char *name, void *probe, void *data) 41 | { 42 | return tracepoint_probe_unregister(name, probe); 43 | } 44 | #elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) 45 | int hook_tracepoint(const char *name, void *probe, void *data) 46 | { 47 | return tracepoint_probe_register(name, probe, data); 48 | } 49 | 50 | int unhook_tracepoint(const char *name, void *probe, void *data) 51 | { 52 | return tracepoint_probe_unregister(name, probe, data); 53 | } 54 | #else 55 | static struct tracepoint *tp_ret; 56 | static void probe_tracepoint(struct tracepoint *tp, void *priv) 57 | { 58 | char *n = priv; 59 | 60 | if (strcmp(tp->name, n) == 0) 61 | tp_ret = tp; 62 | } 63 | 64 | static struct tracepoint *find_tracepoint(const char *name) 65 | { 66 | tp_ret = NULL; 67 | for_each_kernel_tracepoint(probe_tracepoint, (void *)name); 68 | 69 | return tp_ret; 70 | } 71 | 72 | int hook_tracepoint(const char *name, void *probe, void *data) 73 | { 74 | struct tracepoint *tp; 75 | 76 | tp = find_tracepoint(name); 77 | if (!tp) 78 | return 0; 79 | 80 | return tracepoint_probe_register(tp, probe, data); 81 | } 82 | 83 | int unhook_tracepoint(const char *name, void *probe, void *data) 84 | { 85 | struct tracepoint *tp; 86 | 87 | tp = find_tracepoint(name); 88 | if (!tp) 89 | return 0; 90 | 91 | return tracepoint_probe_unregister(tp, probe, data); 92 | } 93 | #endif 94 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/misc.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step4/misc.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step4/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step4/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/misc.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step5/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step5/misc.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o misc.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "7781F3F64D532FB0403CF41"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | #include 11 | 12 | int hook_kprobe(struct kprobe *kp, const char *name, 13 | kprobe_pre_handler_t pre, kprobe_post_handler_t post); 14 | void unhook_kprobe(struct kprobe *kp); 15 | int hook_tracepoint(const char *name, void *probe, void *data); 16 | int unhook_tracepoint(const char *name, void *probe, void *data); 17 | 18 | unsigned int ipstr2int(const char *ipstr); 19 | char *int2ipstr(const unsigned int ip, char *ipstr, const unsigned int ip_str_len); 20 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/index.html: -------------------------------------------------------------------------------- 1 | 2 | 百度一下，你就知道

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3 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | #include 21 | 22 | #include "drop_packet.h" 23 | 24 | static unsigned long drop_packet_activated; 25 | 26 | static unsigned int drop_patcket_saddr = 0; 27 | static unsigned int drop_patcket_sport = 0; 28 | static unsigned int drop_patcket_daddr = 0; 29 | static unsigned int drop_patcket_dport = 0; 30 | 31 | static struct rb_root drop_packet_tree = RB_ROOT; 32 | static LIST_HEAD(drop_packet_list); 33 | static DEFINE_SPINLOCK(drop_packet_lock); 34 | 35 | static struct kprobe kprobe_eth_type_trans; 36 | static struct kprobe kprobe_napi_gro_receive; 37 | static struct kprobe kprobe___netif_receive_skb_core; 38 | static struct kprobe kprobe_tcp_v4_rcv; 39 | 40 | enum packet_footprint 41 | { 42 | ETH_RECV, 43 | GRO_RECV, 44 | RECV_SKB, 45 | TCP_V4_RCV, 46 | SEND_SKB, 47 | TRACK_COUNT, 48 | }; 49 | 50 | static char *packet_footprint_str[TRACK_COUNT] = { 51 | "ETH_RECV", 52 | "GRO_RECV", 53 | "RECV_SKB", 54 | "TCP_V4_RCV", 55 | "SEND_SKB", 56 | }; 57 | 58 | struct conn_desc 59 | { 60 | int protocol; 61 | int saddr; 62 | int sport; 63 | int daddr; 64 | int dport; 65 | 66 | atomic64_t packages[TRACK_COUNT]; 67 | 68 | struct rb_node rb_node; 69 | struct list_head list; 70 | }; 71 | 72 | __maybe_unused int compare_conn(__u8 protocol, 73 | unsigned int saddr, 74 | unsigned int sport, 75 | unsigned int daddr, 76 | unsigned int dport, 77 | struct conn_desc *conn) 78 | { 79 | if (protocol < conn->protocol) 80 | return -1; 81 | if (protocol > conn->protocol) 82 | return 1; 83 | if (saddr < conn->saddr) 84 | return -1; 85 | if (saddr > conn->saddr) 86 | return 1; 87 | if (sport < conn->sport) 88 | return -1; 89 | if (sport > conn->sport) 90 | return 1; 91 | if (daddr < conn->daddr) 92 | return -1; 93 | if (daddr > conn->daddr) 94 | return 1; 95 | if (dport < conn->dport) 96 | return -1; 97 | if (dport > conn->dport) 98 | return 1; 99 | 100 | return 0; 101 | } 102 | 103 | __maybe_unused static struct conn_desc *__find_alloc_desc(struct rb_root *root, 104 | __u8 protocol, 105 | unsigned int saddr, 106 | unsigned int sport, 107 | unsigned int daddr, 108 | unsigned int dport) 109 | { 110 | struct rb_node **node, *parent; 111 | struct conn_desc *conn_desc = NULL; 112 | 113 | node = &root->rb_node; 114 | parent = NULL; 115 | while (*node != NULL) { 116 | struct conn_desc *this; 117 | int ret = 0; 118 | 119 | parent = *node; 120 | this = container_of(parent, struct conn_desc, rb_node); 121 | ret = compare_conn(protocol, saddr, sport, daddr, dport, this); 122 | 123 | if (ret < 0) 124 | node = &parent->rb_left; 125 | else if (ret > 0) 126 | node = &parent->rb_right; 127 | else 128 | return this; 129 | } 130 | 131 | conn_desc = kmalloc(sizeof(struct conn_desc), GFP_ATOMIC | __GFP_ZERO); 132 | if (conn_desc) { 133 | conn_desc->protocol = protocol; 134 | conn_desc->saddr = saddr; 135 | conn_desc->sport = sport; 136 | conn_desc->daddr = daddr; 137 | conn_desc->dport = dport; 138 | 139 | INIT_LIST_HEAD(&conn_desc->list); 140 | list_add_tail(&conn_desc->list, &drop_packet_list); 141 | rb_link_node(&conn_desc->rb_node, parent, node); 142 | rb_insert_color(&conn_desc->rb_node, root); 143 | } 144 | 145 | return conn_desc; 146 | } 147 | 148 | __maybe_unused static struct conn_desc *find_alloc_desc(__u8 protocol, 149 | unsigned int saddr, 150 | unsigned int sport, 151 | unsigned int daddr, 152 | unsigned int dport) 153 | { 154 | unsigned long flags; 155 | struct conn_desc *ret; 156 | 157 | spin_lock_irqsave(&drop_packet_lock, flags); 158 | ret = __find_alloc_desc(&drop_packet_tree, protocol, 159 | saddr, sport, daddr, dport); 160 | spin_unlock_irqrestore(&drop_packet_lock, flags); 161 | 162 | return ret; 163 | } 164 | 165 | static void trace_packet(const struct sk_buff *skb, 166 | const struct iphdr *iphdr, enum packet_footprint fp) 167 | { 168 | int source = 0; 169 | int dest = 0; 170 | struct conn_desc *conn_desc; 171 | 172 | if (fp >= TRACK_COUNT) 173 | return; 174 | 175 | if (iphdr->protocol == IPPROTO_UDP) 176 | { 177 | struct udphdr *uh; 178 | 179 | uh = (void *)iphdr + iphdr->ihl * 4; 180 | source = be16_to_cpu(uh->source); 181 | dest = be16_to_cpu(uh->dest); 182 | } 183 | else if (iphdr->protocol == IPPROTO_TCP) 184 | { 185 | struct tcphdr *th; 186 | 187 | th = (void *)iphdr + iphdr->ihl * 4; 188 | source = be16_to_cpu(th->source); 189 | dest = be16_to_cpu(th->dest); 190 | } else 191 | return; 192 | 193 | conn_desc = find_alloc_desc(iphdr->protocol, 194 | iphdr->saddr, source, iphdr->daddr, dest); 195 | if (!conn_desc) 196 | return; 197 | 198 | atomic64_inc(&conn_desc->packages[fp]); 199 | } 200 | 201 | static void trace_net_dev_xmit_hit(void *ignore, struct sk_buff *skb, 202 | int rc, struct net_device *dev, unsigned int skb_len) 203 | { 204 | struct iphdr *iphdr; 205 | 206 | if (!drop_packet_activated) 207 | return; 208 | 209 | if (rc != NETDEV_TX_OK) 210 | return; 211 | 212 | iphdr = ip_hdr(skb); 213 | trace_packet(skb, iphdr, SEND_SKB); 214 | } 215 | 216 | static int kprobe_eth_type_trans_pre(struct kprobe *p, struct pt_regs *regs) 217 | { 218 | struct sk_buff *skb = (void *)regs->di; 219 | struct iphdr *iphdr; 220 | 221 | if (!drop_packet_activated) 222 | return 0; 223 | 224 | iphdr = (struct iphdr *)(skb->data + ETH_HLEN); 225 | trace_packet(skb, iphdr, ETH_RECV); 226 | 227 | return 0; 228 | } 229 | 230 | static int kprobe_napi_gro_receive_pre(struct kprobe *p, struct pt_regs *regs) 231 | { 232 | struct sk_buff *skb = (void *)regs->si; 233 | struct iphdr *iphdr; 234 | 235 | if (!drop_packet_activated) 236 | return 0; 237 | 238 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 239 | return 0; 240 | 241 | iphdr = (struct iphdr *)skb->data; 242 | trace_packet(skb, iphdr, GRO_RECV); 243 | 244 | return 0; 245 | } 246 | 247 | static int kprobe___netif_receive_skb_core_pre(struct kprobe *p, struct pt_regs *regs) 248 | { 249 | struct sk_buff *skb = (void *)regs->di; 250 | struct iphdr *iphdr; 251 | 252 | if (!drop_packet_activated) 253 | return 0; 254 | 255 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 256 | return 0; 257 | 258 | iphdr = (struct iphdr *)skb->data; 259 | trace_packet(skb, iphdr, RECV_SKB); 260 | 261 | return 0; 262 | } 263 | 264 | static int kprobe_tcp_v4_rcv_pre(struct kprobe *p, struct pt_regs *regs) 265 | { 266 | struct sk_buff *skb = (void *)regs->di; 267 | struct iphdr *iphdr; 268 | 269 | if (!drop_packet_activated) 270 | return 0; 271 | 272 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 273 | return 0; 274 | 275 | iphdr = ip_hdr(skb); 276 | trace_packet(skb, iphdr, TCP_V4_RCV); 277 | 278 | return 0; 279 | } 280 | 281 | static int activate_drop_packet(void) 282 | { 283 | hook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 284 | hook_kprobe(&kprobe_eth_type_trans, "eth_type_trans", 285 | kprobe_eth_type_trans_pre, NULL); 286 | hook_kprobe(&kprobe_napi_gro_receive, "napi_gro_receive", 287 | kprobe_napi_gro_receive_pre, NULL); 288 | hook_kprobe(&kprobe___netif_receive_skb_core, "__netif_receive_skb_core", 289 | kprobe___netif_receive_skb_core_pre, NULL); 290 | hook_kprobe(&kprobe_tcp_v4_rcv, "tcp_v4_rcv", 291 | kprobe_tcp_v4_rcv_pre, NULL); 292 | 293 | return 1; 294 | } 295 | 296 | static void deactivate_drop_packet(void) 297 | { 298 | unhook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 299 | unhook_kprobe(&kprobe_eth_type_trans); 300 | unhook_kprobe(&kprobe_napi_gro_receive); 301 | unhook_kprobe(&kprobe___netif_receive_skb_core); 302 | unhook_kprobe(&kprobe_tcp_v4_rcv); 303 | } 304 | 305 | static int drop_packet_show(struct seq_file *m, void *v) 306 | { 307 | struct conn_desc *this; 308 | unsigned long flags; 309 | struct list_head header; 310 | int i; 311 | 312 | seq_printf(m, "settings:\n"); 313 | seq_printf(m, " activated: %s\n", drop_packet_activated ? "y" : "N"); 314 | 315 | INIT_LIST_HEAD(&header); 316 | spin_lock_irqsave(&drop_packet_lock, flags); 317 | drop_packet_tree = RB_ROOT; 318 | list_splice_init(&drop_packet_list, &header); 319 | spin_unlock_irqrestore(&drop_packet_lock, flags); 320 | 321 | synchronize_sched(); 322 | 323 | list_for_each_entry(this, &header, list) 324 | { 325 | unsigned char *saddr = (void *)&this->saddr; 326 | unsigned char *daddr = (void *)&this->daddr; 327 | 328 | seq_printf(m, 329 | "protocol：%s, Source IP: %u.%u.%u.%u, Source Port: %d, " 330 | "Dest IP: %u.%u.%u.%u, Dest Port: %d\n", 331 | this->protocol == IPPROTO_UDP ? "UDP" : "TCP", 332 | saddr[0], saddr[1], saddr[2], saddr[3], this->sport, 333 | daddr[0], daddr[1], daddr[2], daddr[3], this->dport); 334 | for (i = 0; i < TRACK_COUNT; i++) { 335 | seq_printf(m, 336 | " %s: %lu\n", 337 | packet_footprint_str[i], 338 | atomic64_read(&this->packages[i])); 339 | } 340 | } 341 | 342 | while (!list_empty(&header)) 343 | { 344 | struct conn_desc *this = list_first_entry(&header, 345 | struct conn_desc, list); 346 | 347 | list_del_init(&this->list); 348 | kfree(this); 349 | } 350 | 351 | return 0; 352 | } 353 | 354 | static int drop_packet_open(struct inode *inode, struct file *filp) 355 | { 356 | return single_open(filp, drop_packet_show, NULL); 357 | } 358 | 359 | static ssize_t drop_packet_write(struct file *file, 360 | const char __user *buf, size_t count, loff_t *offs) 361 | { 362 | int ret; 363 | char cmd[255]; 364 | char chr[255]; 365 | 366 | if (count < 1 || *offs) 367 | return -EINVAL; 368 | 369 | if (copy_from_user(chr, buf, 255)) 370 | return -EFAULT; 371 | 372 | ret = sscanf(chr, "%255s", cmd); 373 | if (ret <= 0) 374 | return -EINVAL; 375 | 376 | if (strcmp(cmd, "activate") == 0) { 377 | if (!drop_packet_activated) 378 | drop_packet_activated = activate_drop_packet(); 379 | } else if (strcmp(cmd, "deactivate") == 0) { 380 | if (drop_packet_activated) 381 | deactivate_drop_packet(); 382 | drop_packet_activated = 0; 383 | } else if (strcmp(cmd, "source-addr") == 0) { 384 | char addr[255]; 385 | 386 | ret = sscanf(chr, "%255s %255s", cmd, addr); 387 | if (ret == 2) { 388 | drop_patcket_saddr = ipstr2int(addr); 389 | } else if (ret == 1) { 390 | drop_patcket_saddr = 0; 391 | } 392 | } else if (strcmp(cmd, "source-port") == 0) { 393 | unsigned int port; 394 | 395 | ret = sscanf(chr, "%255s %255d", cmd, &port); 396 | if (ret == 2) { 397 | drop_patcket_sport = port; 398 | } else if (ret == 1) { 399 | drop_patcket_sport = 0; 400 | } 401 | } else if (strcmp(cmd, "dest-addr") == 0) { 402 | char addr[255]; 403 | 404 | ret = sscanf(chr, "%255s %255s", cmd, addr); 405 | if (ret == 2) { 406 | drop_patcket_daddr = ipstr2int(addr); 407 | } else if (ret == 1) { 408 | drop_patcket_daddr = 0; 409 | } 410 | } else if (strcmp(cmd, "dest-port") == 0) { 411 | unsigned int port; 412 | 413 | ret = sscanf(chr, "%255s %255d", cmd, &port); 414 | if (ret == 2) { 415 | drop_patcket_dport = port; 416 | } else if (ret == 1) { 417 | drop_patcket_dport = 0; 418 | } 419 | } 420 | 421 | return count; 422 | } 423 | 424 | const struct file_operations drop_packet_fops = { 425 | .open = drop_packet_open, 426 | .read = seq_read, 427 | .llseek = seq_lseek, 428 | .write = drop_packet_write, 429 | .release = single_release, 430 | }; 431 | 432 | static int drop_packet_init(void) 433 | { 434 | int ret; 435 | struct proc_dir_entry *pe; 436 | 437 | proc_mkdir("mooc", NULL); 438 | proc_mkdir("mooc/net", NULL); 439 | 440 | ret = -ENOMEM; 441 | pe = proc_create("mooc/net/drop-packet", 442 | S_IFREG | 0644, 443 | NULL, 444 | &drop_packet_fops); 445 | if (!pe) 446 | goto err_proc; 447 | 448 | printk("drop-packet loaded.\n"); 449 | 450 | return 0; 451 | 452 | err_proc: 453 | return ret; 454 | } 455 | 456 | static void drop_packet_exit(void) 457 | { 458 | remove_proc_entry("mooc/net/drop-packet", NULL); 459 | remove_proc_entry("mooc/net", NULL); 460 | remove_proc_entry("mooc", NULL); 461 | 462 | if (drop_packet_activated) 463 | deactivate_drop_packet(); 464 | drop_packet_activated = 0; 465 | 466 | printk("drop-packet unloaded.\n"); 467 | } 468 | 469 | module_init(drop_packet_init) 470 | module_exit(drop_packet_exit) 471 | 472 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 473 | MODULE_AUTHOR("Baoyou Xie "); 474 | MODULE_LICENSE("GPL v2"); 475 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/misc.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | #include "drop_packet.h" 6 | 7 | int hook_kprobe(struct kprobe *kp, const char *name, 8 | kprobe_pre_handler_t pre, kprobe_post_handler_t post) 9 | { 10 | kprobe_opcode_t *addr; 11 | 12 | if (!name || strlen(name) >= 255) 13 | return -EINVAL; 14 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); 15 | if (!addr) 16 | return -EINVAL; 17 | 18 | memset(kp, 0, sizeof(struct kprobe)); 19 | kp->symbol_name = name; 20 | kp->pre_handler = pre; 21 | kp->post_handler = post; 22 | 23 | register_kprobe(kp); 24 | 25 | return 0; 26 | } 27 | 28 | void unhook_kprobe(struct kprobe *kp) 29 | { 30 | unregister_kprobe(kp); 31 | memset(kp, 0, sizeof(struct kprobe)); 32 | } 33 | 34 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) 35 | int hook_tracepoint(const char *name, void *probe, void *data) 36 | { 37 | return tracepoint_probe_register(name, probe); 38 | } 39 | 40 | int unhook_tracepoint(const char *name, void *probe, void *data) 41 | { 42 | return tracepoint_probe_unregister(name, probe); 43 | } 44 | #elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) 45 | int hook_tracepoint(const char *name, void *probe, void *data) 46 | { 47 | return tracepoint_probe_register(name, probe, data); 48 | } 49 | 50 | int unhook_tracepoint(const char *name, void *probe, void *data) 51 | { 52 | return tracepoint_probe_unregister(name, probe, data); 53 | } 54 | #else 55 | static struct tracepoint *tp_ret; 56 | static void probe_tracepoint(struct tracepoint *tp, void *priv) 57 | { 58 | char *n = priv; 59 | 60 | if (strcmp(tp->name, n) == 0) 61 | tp_ret = tp; 62 | } 63 | 64 | static struct tracepoint *find_tracepoint(const char *name) 65 | { 66 | tp_ret = NULL; 67 | for_each_kernel_tracepoint(probe_tracepoint, (void *)name); 68 | 69 | return tp_ret; 70 | } 71 | 72 | int hook_tracepoint(const char *name, void *probe, void *data) 73 | { 74 | struct tracepoint *tp; 75 | 76 | tp = find_tracepoint(name); 77 | if (!tp) 78 | return 0; 79 | 80 | return tracepoint_probe_register(tp, probe, data); 81 | } 82 | 83 | int unhook_tracepoint(const char *name, void *probe, void *data) 84 | { 85 | struct tracepoint *tp; 86 | 87 | tp = find_tracepoint(name); 88 | if (!tp) 89 | return 0; 90 | 91 | return tracepoint_probe_unregister(tp, probe, data); 92 | } 93 | #endif 94 | 95 | #define IP_STR_LEN 18 96 | #define MAC_STR_LEN 18 97 | #define MAC_BIT_LEN 6 98 | #define LITTLE_ENDIAN 0 99 | #define BIG_ENDIAN 1 100 | 101 | int big_little_endian(void) 102 | { 103 | int data = 0x1; 104 | 105 | if (*((char *)&data) == 0x1) 106 | return LITTLE_ENDIAN; 107 | 108 | return BIG_ENDIAN; 109 | } 110 | 111 | unsigned int ipstr2int(const char *ipstr) 112 | { 113 | unsigned int a, b, c, d; 114 | unsigned int ip = 0; 115 | int count; 116 | 117 | count = sscanf(ipstr, "%u.%u.%u.%u", &a, &b, &c, &d); 118 | if (count == 4) { 119 | a = (a << 24); 120 | b = (b << 16); 121 | c = (c << 8); 122 | d = (d << 0); 123 | ip = a | b | c | d; 124 | 125 | return ip; 126 | } else { 127 | return 0; 128 | } 129 | } 130 | 131 | char *int2ipstr(const unsigned int ip, char *ipstr, const unsigned int ip_str_len) 132 | { 133 | int len; 134 | 135 | if (big_little_endian() == LITTLE_ENDIAN) 136 | len = snprintf(ipstr, ip_str_len, "%u.%u.%u.%u", 137 | (unsigned char) * ((char *)(&ip) + 3), 138 | (unsigned char) * ((char *)(&ip) + 2), 139 | (unsigned char) * ((char *)(&ip) + 1), 140 | (unsigned char) * ((char *)(&ip) + 0)); 141 | else 142 | len = snprintf(ipstr, ip_str_len, "%u.%u.%u.%u", 143 | (unsigned char) * ((char *)(&ip) + 0), 144 | (unsigned char) * ((char *)(&ip) + 1), 145 | (unsigned char) * ((char *)(&ip) + 2), 146 | (unsigned char) * ((char *)(&ip) + 3)); 147 | 148 | if (len < ip_str_len) 149 | return ipstr; 150 | else 151 | return NULL; 152 | } 153 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/misc.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step5/misc.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step5/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step5/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/.drop-packet.ko.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.ko := ld -r -m elf_x86_64 -z max-page-size=0x200000 -T ./scripts/module-common.lds --build-id -o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.ko /home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.mod.o ; true 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/.drop-packet.o.cmd: -------------------------------------------------------------------------------- 1 | cmd_/home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.o := ld -m elf_x86_64 -z max-page-size=0x200000 -r -o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/misc.o 2 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/.tmp_versions/drop-packet.mod: -------------------------------------------------------------------------------- 1 | /home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.ko 2 | /home/xiebaoyou/study/陈老师/drop-packet/src/step6/main.o /home/xiebaoyou/study/陈老师/drop-packet/src/step6/misc.o 3 | 4 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/Makefile: -------------------------------------------------------------------------------- 1 | OS_VER := UNKNOWN 2 | UNAME := $(shell uname -r) 3 | ifneq ($(findstring 4.15.0-39-generic,$(UNAME)),) 4 | OS_VER := UBUNTU_1604 5 | endif 6 | 7 | ifneq ($(KERNELRELEASE),) 8 | obj-m += $(MODNAME).o 9 | $(MODNAME)-y := main.o misc.o 10 | ccflags-y := -I$(PWD)/ 11 | else 12 | export PWD=`pwd` 13 | 14 | ifeq ($(KERNEL_BUILD_PATH),) 15 | KERNEL_BUILD_PATH := /lib/modules/`uname -r`/build 16 | endif 17 | ifeq ($(MODNAME),) 18 | export MODNAME=drop-packet 19 | endif 20 | 21 | all: 22 | make CFLAGS_MODULE=-D$(OS_VER) -C /lib/modules/`uname -r`/build M=`pwd` modules 23 | clean: 24 | make -C $(KERNEL_BUILD_PATH) M=$(PWD) clean 25 | endif 26 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/Module.symvers: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/Module.symvers -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/drop-packet.ko: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/drop-packet.ko -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/drop-packet.mod.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | MODULE_INFO(vermagic, VERMAGIC_STRING); 6 | MODULE_INFO(name, KBUILD_MODNAME); 7 | 8 | __visible struct module __this_module 9 | __attribute__((section(".gnu.linkonce.this_module"))) = { 10 | .name = KBUILD_MODNAME, 11 | .init = init_module, 12 | #ifdef CONFIG_MODULE_UNLOAD 13 | .exit = cleanup_module, 14 | #endif 15 | .arch = MODULE_ARCH_INIT, 16 | }; 17 | 18 | #ifdef RETPOLINE 19 | MODULE_INFO(retpoline, "Y"); 20 | #endif 21 | 22 | static const char __module_depends[] 23 | __used 24 | __attribute__((section(".modinfo"))) = 25 | "depends="; 26 | 27 | 28 | MODULE_INFO(srcversion, "05E5DEECA29C9E2F073ED10"); 29 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/drop-packet.mod.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/drop-packet.mod.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/drop-packet.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/drop-packet.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/drop_packet.h: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | #include 11 | 12 | int hook_kprobe(struct kprobe *kp, const char *name, 13 | kprobe_pre_handler_t pre, kprobe_post_handler_t post); 14 | void unhook_kprobe(struct kprobe *kp); 15 | int hook_tracepoint(const char *name, void *probe, void *data); 16 | int unhook_tracepoint(const char *name, void *probe, void *data); 17 | 18 | unsigned int ipstr2int(const char *ipstr); 19 | char *int2ipstr(const unsigned int ip, char *ipstr, const unsigned int ip_str_len); 20 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/index.html: -------------------------------------------------------------------------------- 1 | 2 | 百度一下，你就知道

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3 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * Baoyou Xie's drop-packet module 3 | * 4 | * Copyright (C) 2018 Baoyou Xie. 5 | * 6 | * Author: Baoyou Xie 7 | * 8 | * License terms: GNU General Public License (GPL) version 2 9 | */ 10 | 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #include 17 | #include 18 | #include 19 | #include 20 | #include 21 | 22 | #include "drop_packet.h" 23 | 24 | static unsigned long drop_packet_activated; 25 | 26 | static unsigned int drop_patcket_saddr = 0; 27 | static unsigned int drop_patcket_sport = 0; 28 | static unsigned int drop_patcket_daddr = 0; 29 | static unsigned int drop_patcket_dport = 0; 30 | 31 | static struct rb_root drop_packet_tree = RB_ROOT; 32 | static LIST_HEAD(drop_packet_list); 33 | static DEFINE_SPINLOCK(drop_packet_lock); 34 | 35 | static struct kprobe kprobe_eth_type_trans; 36 | static struct kprobe kprobe_napi_gro_receive; 37 | static struct kprobe kprobe___netif_receive_skb_core; 38 | static struct kprobe kprobe_tcp_v4_rcv; 39 | 40 | enum packet_footprint 41 | { 42 | ETH_RECV, 43 | GRO_RECV, 44 | RECV_SKB, 45 | TCP_V4_RCV, 46 | SEND_SKB, 47 | TRACK_COUNT, 48 | }; 49 | 50 | static char *packet_footprint_str[TRACK_COUNT] = { 51 | "ETH_RECV", 52 | "GRO_RECV", 53 | "RECV_SKB", 54 | "TCP_V4_RCV", 55 | "SEND_SKB", 56 | }; 57 | 58 | struct conn_desc 59 | { 60 | int protocol; 61 | int saddr; 62 | int sport; 63 | int daddr; 64 | int dport; 65 | 66 | atomic64_t packages[TRACK_COUNT]; 67 | 68 | struct rb_node rb_node; 69 | struct list_head list; 70 | }; 71 | 72 | __maybe_unused static void clean_data(void) 73 | { 74 | unsigned long flags; 75 | struct list_head header; 76 | 77 | INIT_LIST_HEAD(&header); 78 | spin_lock_irqsave(&drop_packet_lock, flags); 79 | drop_packet_tree = RB_ROOT; 80 | list_splice_init(&drop_packet_list, &header); 81 | spin_unlock_irqrestore(&drop_packet_lock, flags); 82 | 83 | synchronize_sched(); 84 | 85 | while (!list_empty(&header)) 86 | { 87 | struct conn_desc *this = list_first_entry(&header, struct conn_desc, list); 88 | 89 | list_del_init(&this->list); 90 | kfree(this); 91 | } 92 | } 93 | 94 | __maybe_unused int compare_conn(__u8 protocol, 95 | unsigned int saddr, 96 | unsigned int sport, 97 | unsigned int daddr, 98 | unsigned int dport, 99 | struct conn_desc *conn) 100 | { 101 | if (protocol < conn->protocol) 102 | return -1; 103 | if (protocol > conn->protocol) 104 | return 1; 105 | if (saddr < conn->saddr) 106 | return -1; 107 | if (saddr > conn->saddr) 108 | return 1; 109 | if (sport < conn->sport) 110 | return -1; 111 | if (sport > conn->sport) 112 | return 1; 113 | if (daddr < conn->daddr) 114 | return -1; 115 | if (daddr > conn->daddr) 116 | return 1; 117 | if (dport < conn->dport) 118 | return -1; 119 | if (dport > conn->dport) 120 | return 1; 121 | 122 | return 0; 123 | } 124 | 125 | __maybe_unused static struct conn_desc *__find_alloc_desc(struct rb_root *root, 126 | __u8 protocol, 127 | unsigned int saddr, 128 | unsigned int sport, 129 | unsigned int daddr, 130 | unsigned int dport) 131 | { 132 | struct rb_node **node, *parent; 133 | struct conn_desc *conn_desc = NULL; 134 | 135 | node = &root->rb_node; 136 | parent = NULL; 137 | while (*node != NULL) { 138 | struct conn_desc *this; 139 | int ret = 0; 140 | 141 | parent = *node; 142 | this = container_of(parent, struct conn_desc, rb_node); 143 | ret = compare_conn(protocol, saddr, sport, daddr, dport, this); 144 | 145 | if (ret < 0) 146 | node = &parent->rb_left; 147 | else if (ret > 0) 148 | node = &parent->rb_right; 149 | else 150 | return this; 151 | } 152 | 153 | conn_desc = kmalloc(sizeof(struct conn_desc), GFP_ATOMIC | __GFP_ZERO); 154 | if (conn_desc) { 155 | conn_desc->protocol = protocol; 156 | conn_desc->saddr = saddr; 157 | conn_desc->sport = sport; 158 | conn_desc->daddr = daddr; 159 | conn_desc->dport = dport; 160 | 161 | INIT_LIST_HEAD(&conn_desc->list); 162 | list_add_tail(&conn_desc->list, &drop_packet_list); 163 | rb_link_node(&conn_desc->rb_node, parent, node); 164 | rb_insert_color(&conn_desc->rb_node, root); 165 | } 166 | 167 | return conn_desc; 168 | } 169 | 170 | __maybe_unused static struct conn_desc *find_alloc_desc(__u8 protocol, 171 | unsigned int saddr, 172 | unsigned int sport, 173 | unsigned int daddr, 174 | unsigned int dport) 175 | { 176 | unsigned long flags; 177 | struct conn_desc *ret; 178 | 179 | spin_lock_irqsave(&drop_packet_lock, flags); 180 | ret = __find_alloc_desc(&drop_packet_tree, protocol, 181 | saddr, sport, daddr, dport); 182 | spin_unlock_irqrestore(&drop_packet_lock, flags); 183 | 184 | return ret; 185 | } 186 | 187 | static void trace_packet(const struct sk_buff *skb, 188 | const struct iphdr *iphdr, enum packet_footprint fp) 189 | { 190 | int source = 0; 191 | int dest = 0; 192 | struct conn_desc *conn_desc; 193 | 194 | if (fp >= TRACK_COUNT) 195 | return; 196 | 197 | if (iphdr->protocol == IPPROTO_UDP) 198 | { 199 | struct udphdr *uh; 200 | 201 | uh = (void *)iphdr + iphdr->ihl * 4; 202 | source = be16_to_cpu(uh->source); 203 | dest = be16_to_cpu(uh->dest); 204 | } 205 | else if (iphdr->protocol == IPPROTO_TCP) 206 | { 207 | struct tcphdr *th; 208 | 209 | th = (void *)iphdr + iphdr->ihl * 4; 210 | source = be16_to_cpu(th->source); 211 | dest = be16_to_cpu(th->dest); 212 | } else 213 | return; 214 | 215 | conn_desc = find_alloc_desc(iphdr->protocol, 216 | iphdr->saddr, source, iphdr->daddr, dest); 217 | if (!conn_desc) 218 | return; 219 | 220 | atomic64_inc(&conn_desc->packages[fp]); 221 | } 222 | 223 | static void trace_net_dev_xmit_hit(void *ignore, struct sk_buff *skb, 224 | int rc, struct net_device *dev, unsigned int skb_len) 225 | { 226 | struct iphdr *iphdr; 227 | 228 | if (!drop_packet_activated) 229 | return; 230 | 231 | if (rc != NETDEV_TX_OK) 232 | return; 233 | 234 | iphdr = ip_hdr(skb); 235 | trace_packet(skb, iphdr, SEND_SKB); 236 | } 237 | 238 | static int kprobe_eth_type_trans_pre(struct kprobe *p, struct pt_regs *regs) 239 | { 240 | struct sk_buff *skb = (void *)regs->di; 241 | struct iphdr *iphdr; 242 | 243 | if (!drop_packet_activated) 244 | return 0; 245 | 246 | iphdr = (struct iphdr *)(skb->data + ETH_HLEN); 247 | trace_packet(skb, iphdr, ETH_RECV); 248 | 249 | return 0; 250 | } 251 | 252 | static int kprobe_napi_gro_receive_pre(struct kprobe *p, struct pt_regs *regs) 253 | { 254 | struct sk_buff *skb = (void *)regs->si; 255 | struct iphdr *iphdr; 256 | 257 | if (!drop_packet_activated) 258 | return 0; 259 | 260 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 261 | return 0; 262 | 263 | iphdr = (struct iphdr *)skb->data; 264 | trace_packet(skb, iphdr, GRO_RECV); 265 | 266 | return 0; 267 | } 268 | 269 | static int kprobe___netif_receive_skb_core_pre(struct kprobe *p, struct pt_regs *regs) 270 | { 271 | struct sk_buff *skb = (void *)regs->di; 272 | struct iphdr *iphdr; 273 | 274 | if (!drop_packet_activated) 275 | return 0; 276 | 277 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 278 | return 0; 279 | 280 | iphdr = (struct iphdr *)skb->data; 281 | trace_packet(skb, iphdr, RECV_SKB); 282 | 283 | return 0; 284 | } 285 | 286 | static int kprobe_tcp_v4_rcv_pre(struct kprobe *p, struct pt_regs *regs) 287 | { 288 | struct sk_buff *skb = (void *)regs->di; 289 | struct iphdr *iphdr; 290 | 291 | if (!drop_packet_activated) 292 | return 0; 293 | 294 | if (skb->protocol != cpu_to_be16(ETH_P_IP)) 295 | return 0; 296 | 297 | iphdr = ip_hdr(skb); 298 | trace_packet(skb, iphdr, TCP_V4_RCV); 299 | 300 | return 0; 301 | } 302 | 303 | static int activate_drop_packet(void) 304 | { 305 | clean_data(); 306 | 307 | hook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 308 | hook_kprobe(&kprobe_eth_type_trans, "eth_type_trans", 309 | kprobe_eth_type_trans_pre, NULL); 310 | hook_kprobe(&kprobe_napi_gro_receive, "napi_gro_receive", 311 | kprobe_napi_gro_receive_pre, NULL); 312 | hook_kprobe(&kprobe___netif_receive_skb_core, "__netif_receive_skb_core", 313 | kprobe___netif_receive_skb_core_pre, NULL); 314 | hook_kprobe(&kprobe_tcp_v4_rcv, "tcp_v4_rcv", 315 | kprobe_tcp_v4_rcv_pre, NULL); 316 | 317 | return 1; 318 | } 319 | 320 | static void deactivate_drop_packet(void) 321 | { 322 | unhook_tracepoint("net_dev_xmit", trace_net_dev_xmit_hit, NULL); 323 | unhook_kprobe(&kprobe_eth_type_trans); 324 | unhook_kprobe(&kprobe_napi_gro_receive); 325 | unhook_kprobe(&kprobe___netif_receive_skb_core); 326 | unhook_kprobe(&kprobe_tcp_v4_rcv); 327 | 328 | clean_data(); 329 | } 330 | 331 | static int drop_packet_show(struct seq_file *m, void *v) 332 | { 333 | struct conn_desc *this; 334 | unsigned long flags; 335 | struct list_head header; 336 | int i; 337 | 338 | seq_printf(m, "settings:\n"); 339 | seq_printf(m, " activated: %s\n", drop_packet_activated ? "y" : "N"); 340 | 341 | INIT_LIST_HEAD(&header); 342 | spin_lock_irqsave(&drop_packet_lock, flags); 343 | drop_packet_tree = RB_ROOT; 344 | list_splice_init(&drop_packet_list, &header); 345 | spin_unlock_irqrestore(&drop_packet_lock, flags); 346 | 347 | synchronize_sched(); 348 | 349 | list_for_each_entry(this, &header, list) 350 | { 351 | unsigned char *saddr = (void *)&this->saddr; 352 | unsigned char *daddr = (void *)&this->daddr; 353 | 354 | seq_printf(m, 355 | "protocol：%s, Source IP: %u.%u.%u.%u, Source Port: %d, " 356 | "Dest IP: %u.%u.%u.%u, Dest Port: %d\n", 357 | this->protocol == IPPROTO_UDP ? "UDP" : "TCP", 358 | saddr[0], saddr[1], saddr[2], saddr[3], this->sport, 359 | daddr[0], daddr[1], daddr[2], daddr[3], this->dport); 360 | for (i = 0; i < TRACK_COUNT; i++) { 361 | seq_printf(m, 362 | " %s: %lu\n", 363 | packet_footprint_str[i], 364 | atomic64_read(&this->packages[i])); 365 | } 366 | } 367 | 368 | while (!list_empty(&header)) 369 | { 370 | struct conn_desc *this = list_first_entry(&header, 371 | struct conn_desc, list); 372 | 373 | list_del_init(&this->list); 374 | kfree(this); 375 | } 376 | 377 | return 0; 378 | } 379 | 380 | static int drop_packet_open(struct inode *inode, struct file *filp) 381 | { 382 | return single_open(filp, drop_packet_show, NULL); 383 | } 384 | 385 | static ssize_t drop_packet_write(struct file *file, 386 | const char __user *buf, size_t count, loff_t *offs) 387 | { 388 | int ret; 389 | char cmd[255]; 390 | char chr[255]; 391 | 392 | if (count < 1 || *offs) 393 | return -EINVAL; 394 | 395 | if (copy_from_user(chr, buf, 255)) 396 | return -EFAULT; 397 | 398 | ret = sscanf(chr, "%255s", cmd); 399 | if (ret <= 0) 400 | return -EINVAL; 401 | 402 | if (strcmp(cmd, "activate") == 0) { 403 | if (!drop_packet_activated) 404 | drop_packet_activated = activate_drop_packet(); 405 | } else if (strcmp(cmd, "deactivate") == 0) { 406 | if (drop_packet_activated) 407 | deactivate_drop_packet(); 408 | drop_packet_activated = 0; 409 | } else if (strcmp(cmd, "source-addr") == 0) { 410 | char addr[255]; 411 | 412 | ret = sscanf(chr, "%255s %255s", cmd, addr); 413 | if (ret == 2) { 414 | drop_patcket_saddr = ipstr2int(addr); 415 | } else if (ret == 1) { 416 | drop_patcket_saddr = 0; 417 | } 418 | } else if (strcmp(cmd, "source-port") == 0) { 419 | unsigned int port; 420 | 421 | ret = sscanf(chr, "%255s %255d", cmd, &port); 422 | if (ret == 2) { 423 | drop_patcket_sport = port; 424 | } else if (ret == 1) { 425 | drop_patcket_sport = 0; 426 | } 427 | } else if (strcmp(cmd, "dest-addr") == 0) { 428 | char addr[255]; 429 | 430 | ret = sscanf(chr, "%255s %255s", cmd, addr); 431 | if (ret == 2) { 432 | drop_patcket_daddr = ipstr2int(addr); 433 | } else if (ret == 1) { 434 | drop_patcket_daddr = 0; 435 | } 436 | } else if (strcmp(cmd, "dest-port") == 0) { 437 | unsigned int port; 438 | 439 | ret = sscanf(chr, "%255s %255d", cmd, &port); 440 | if (ret == 2) { 441 | drop_patcket_dport = port; 442 | } else if (ret == 1) { 443 | drop_patcket_dport = 0; 444 | } 445 | } 446 | 447 | return count; 448 | } 449 | 450 | const struct file_operations drop_packet_fops = { 451 | .open = drop_packet_open, 452 | .read = seq_read, 453 | .llseek = seq_lseek, 454 | .write = drop_packet_write, 455 | .release = single_release, 456 | }; 457 | 458 | static int drop_packet_init(void) 459 | { 460 | int ret; 461 | struct proc_dir_entry *pe; 462 | 463 | proc_mkdir("mooc", NULL); 464 | proc_mkdir("mooc/net", NULL); 465 | 466 | ret = -ENOMEM; 467 | pe = proc_create("mooc/net/drop-packet", 468 | S_IFREG | 0644, 469 | NULL, 470 | &drop_packet_fops); 471 | if (!pe) 472 | goto err_proc; 473 | 474 | printk("drop-packet loaded.\n"); 475 | 476 | return 0; 477 | 478 | err_proc: 479 | return ret; 480 | } 481 | 482 | static void drop_packet_exit(void) 483 | { 484 | remove_proc_entry("mooc/net/drop-packet", NULL); 485 | remove_proc_entry("mooc/net", NULL); 486 | remove_proc_entry("mooc", NULL); 487 | 488 | if (drop_packet_activated) 489 | deactivate_drop_packet(); 490 | drop_packet_activated = 0; 491 | 492 | printk("drop-packet unloaded.\n"); 493 | } 494 | 495 | module_init(drop_packet_init) 496 | module_exit(drop_packet_exit) 497 | 498 | MODULE_DESCRIPTION("Baoyou Xie's drop-packet module"); 499 | MODULE_AUTHOR("Baoyou Xie "); 500 | MODULE_LICENSE("GPL v2"); 501 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/main.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/main.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/misc.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | #include "drop_packet.h" 6 | 7 | int hook_kprobe(struct kprobe *kp, const char *name, 8 | kprobe_pre_handler_t pre, kprobe_post_handler_t post) 9 | { 10 | kprobe_opcode_t *addr; 11 | 12 | if (!name || strlen(name) >= 255) 13 | return -EINVAL; 14 | addr = (kprobe_opcode_t *)kallsyms_lookup_name(name); 15 | if (!addr) 16 | return -EINVAL; 17 | 18 | memset(kp, 0, sizeof(struct kprobe)); 19 | kp->symbol_name = name; 20 | kp->pre_handler = pre; 21 | kp->post_handler = post; 22 | 23 | register_kprobe(kp); 24 | 25 | return 0; 26 | } 27 | 28 | void unhook_kprobe(struct kprobe *kp) 29 | { 30 | unregister_kprobe(kp); 31 | memset(kp, 0, sizeof(struct kprobe)); 32 | } 33 | 34 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33) 35 | int hook_tracepoint(const char *name, void *probe, void *data) 36 | { 37 | return tracepoint_probe_register(name, probe); 38 | } 39 | 40 | int unhook_tracepoint(const char *name, void *probe, void *data) 41 | { 42 | return tracepoint_probe_unregister(name, probe); 43 | } 44 | #elif LINUX_VERSION_CODE < KERNEL_VERSION(3, 15, 0) 45 | int hook_tracepoint(const char *name, void *probe, void *data) 46 | { 47 | return tracepoint_probe_register(name, probe, data); 48 | } 49 | 50 | int unhook_tracepoint(const char *name, void *probe, void *data) 51 | { 52 | return tracepoint_probe_unregister(name, probe, data); 53 | } 54 | #else 55 | static struct tracepoint *tp_ret; 56 | static void probe_tracepoint(struct tracepoint *tp, void *priv) 57 | { 58 | char *n = priv; 59 | 60 | if (strcmp(tp->name, n) == 0) 61 | tp_ret = tp; 62 | } 63 | 64 | static struct tracepoint *find_tracepoint(const char *name) 65 | { 66 | tp_ret = NULL; 67 | for_each_kernel_tracepoint(probe_tracepoint, (void *)name); 68 | 69 | return tp_ret; 70 | } 71 | 72 | int hook_tracepoint(const char *name, void *probe, void *data) 73 | { 74 | struct tracepoint *tp; 75 | 76 | tp = find_tracepoint(name); 77 | if (!tp) 78 | return 0; 79 | 80 | return tracepoint_probe_register(tp, probe, data); 81 | } 82 | 83 | int unhook_tracepoint(const char *name, void *probe, void *data) 84 | { 85 | struct tracepoint *tp; 86 | 87 | tp = find_tracepoint(name); 88 | if (!tp) 89 | return 0; 90 | 91 | return tracepoint_probe_unregister(tp, probe, data); 92 | } 93 | #endif 94 | 95 | #define IP_STR_LEN 18 96 | #define MAC_STR_LEN 18 97 | #define MAC_BIT_LEN 6 98 | #define LITTLE_ENDIAN 0 99 | #define BIG_ENDIAN 1 100 | 101 | int big_little_endian(void) 102 | { 103 | int data = 0x1; 104 | 105 | if (*((char *)&data) == 0x1) 106 | return LITTLE_ENDIAN; 107 | 108 | return BIG_ENDIAN; 109 | } 110 | 111 | unsigned int ipstr2int(const char *ipstr) 112 | { 113 | unsigned int a, b, c, d; 114 | unsigned int ip = 0; 115 | int count; 116 | 117 | count = sscanf(ipstr, "%u.%u.%u.%u", &a, &b, &c, &d); 118 | if (count == 4) { 119 | a = (a << 24); 120 | b = (b << 16); 121 | c = (c << 8); 122 | d = (d << 0); 123 | ip = a | b | c | d; 124 | 125 | return ip; 126 | } else { 127 | return 0; 128 | } 129 | } 130 | 131 | char *int2ipstr(const unsigned int ip, char *ipstr, const unsigned int ip_str_len) 132 | { 133 | int len; 134 | 135 | if (big_little_endian() == LITTLE_ENDIAN) 136 | len = snprintf(ipstr, ip_str_len, "%u.%u.%u.%u", 137 | (unsigned char) * ((char *)(&ip) + 3), 138 | (unsigned char) * ((char *)(&ip) + 2), 139 | (unsigned char) * ((char *)(&ip) + 1), 140 | (unsigned char) * ((char *)(&ip) + 0)); 141 | else 142 | len = snprintf(ipstr, ip_str_len, "%u.%u.%u.%u", 143 | (unsigned char) * ((char *)(&ip) + 0), 144 | (unsigned char) * ((char *)(&ip) + 1), 145 | (unsigned char) * ((char *)(&ip) + 2), 146 | (unsigned char) * ((char *)(&ip) + 3)); 147 | 148 | if (len < ip_str_len) 149 | return ipstr; 150 | else 151 | return NULL; 152 | } 153 | -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/misc.o: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex14-drop-packet/drop-packet/src/step6/misc.o -------------------------------------------------------------------------------- /ex14-drop-packet/drop-packet/src/step6/modules.order: -------------------------------------------------------------------------------- 1 | kernel//home/xiebaoyou/study/陈老师/drop-packet/src/step6/drop-packet.ko 2 | -------------------------------------------------------------------------------- /ex2-exnum/Makefile: -------------------------------------------------------------------------------- 1 | #产生目标文件 2 | obj-m:=exnum.o 3 | #定义当前路径 4 | CURRENT_PATH:=$(shell pwd) 5 | #定义内核版本号 6 | LINUX_KERNEL:=$(shell uname -r) 7 | #定义内核源码绝对路径 8 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 9 | #编译模块 10 | all: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 12 | #清理模块 13 | clean: 14 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 15 | 16 | 17 | -------------------------------------------------------------------------------- /ex2-exnum/exnum.c: -------------------------------------------------------------------------------- 1 | /********************************************************** 2 | * Author : 梁金荣 3 | * Email : Liangjinrong111@163.com 4 | * Last modified : 2019-09-14 13:00 5 | * Filename : exnum.c 6 | * Description : 模块初始化函数中求最大数（使用内核中的代码） 7 | * *******************************************************/ 8 | 9 | //必要的头文件 10 | #include 11 | #include 12 | #include 13 | //模块的初始化函数，模块的入口函数，加载模块，需超级用户权限 14 | static int __init lk_exnum(void) 15 | { 16 | int x = 1, y = 2; 17 | 18 | printk("The module is starting here！\n"); 19 | printk("x = %d, y = %d\n", x, y); 20 | printk("max=%d\n", max(x++, y++)); 21 | printk("x = %d, y = %d\n", x, y); 22 | printk("min=%d\n", min(x++, y++)); 23 | 24 | return 0; 25 | } 26 | //出口函数，卸载模块，需超级用户权限 27 | static void __exit lk_exit(void) 28 | { 29 | printk("The maxnum moudle has exited!\n"); 30 | } 31 | 32 | module_init(lk_exnum); //内核入口点，调用初始化函数，包含在module.h中 33 | module_exit(lk_exit); //出口点 34 | MODULE_LICENSE("GPL"); //许可证 35 | MODULE_AUTHOR("ljr"); //作者（非必须） 36 | MODULE_DESCRIPTION("max and min number"); //模块描述（非必须） 37 | 38 | -------------------------------------------------------------------------------- /ex2-exnum/maxnum.c: -------------------------------------------------------------------------------- 1 | /********************************************************** 2 | * Author : 梁金荣 3 | * Email : Liangjinrong111@163.com 4 | * Last modified : 2019-09-14 13:00 5 | * Filename : exnum.c 6 | * Description : 模块初始化函数中求最大数（使用内核中的代码） 7 | * *******************************************************/ 8 | 9 | //必要的头文件 10 | #include 11 | #include 12 | #include 13 | //模块的初始化函数，模块的入口函数，加载模块，需超级用户权限 14 | static int __init lk_exnum(void) 15 | { 16 | int x = 5, y = 8; 17 | printk("The module is starting here！\n"); 18 | printk("x = %d, y = %d\n", x, y); 19 | printk("max=%d\n", max(x++, y++)); 20 | printk("x = %d, y = %d\n", x, y); 21 | printk("min=%d\n", min(x++, y++)); 22 | return 0; 23 | } 24 | //出口函数，卸载模块，需超级用户权限 25 | static void __exit lk_exit(void) 26 | { 27 | printk("The maxnum moudle has exited!\n"); 28 | } 29 | 30 | module_init(lk_exnum); //内核入口点，调用初始化函数，包含在module.h中 31 | module_exit(lk_exit); //出口点 32 | MODULE_LICENSE("GPL"); //许可证 33 | MODULE_AUTHOR("ljr"); //作者（非必须） 34 | MODULE_DESCRIPTION("max and min number"); //模块描述（非必须） 35 | 36 | -------------------------------------------------------------------------------- /ex2-exnum/test/diff.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/test/diff.out -------------------------------------------------------------------------------- /ex2-exnum/test/same.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/test/same.out -------------------------------------------------------------------------------- /ex2-exnum/test/testmax.c: -------------------------------------------------------------------------------- 1 | #include 2 | #define max(a,b) ((a)>(b)?(a):(b)) 3 | int main() 4 | { 5 | 6 | int x = 1, y = 2; 7 | printf("max=%d\n", max(x++, y++)); 8 | printf("x = %d, y = %d\n", x, y); 9 | } 10 | -------------------------------------------------------------------------------- /ex2-exnum/test/testmax.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/test/testmax.out -------------------------------------------------------------------------------- /ex2-exnum/test/text_diff.c: -------------------------------------------------------------------------------- 1 | #include 2 | int main() 3 | { 4 | int x=1; 5 | double y=1; 6 | 7 | if((!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))==1) 8 | printf("表达式结果是1\n"); 9 | else 10 | printf("表达式结果不是1\n"); 11 | } 12 | 13 | -------------------------------------------------------------------------------- /ex2-exnum/test/text_same.c: -------------------------------------------------------------------------------- 1 | #include 2 | int main() 3 | { 4 | int x=1; 5 | int y=1; 6 | 7 | if((!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))==1) 8 | printf("表达式结果是1\n"); 9 | else 10 | printf("表达式结果不是1\n"); 11 | } 12 | -------------------------------------------------------------------------------- /ex2-exnum/test/type.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/test/type.out -------------------------------------------------------------------------------- /ex2-exnum/test/type2.out: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/test/type2.out -------------------------------------------------------------------------------- /ex2-exnum/运行结果.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex2-exnum/运行结果.png -------------------------------------------------------------------------------- /ex3-lklist/.Makefile.swo: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex3-lklist/.Makefile.swo -------------------------------------------------------------------------------- /ex3-lklist/.Makefile.swp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex3-lklist/.Makefile.swp -------------------------------------------------------------------------------- /ex3-lklist/Makefile: -------------------------------------------------------------------------------- 1 | #产生目标文件 2 | obj-m:=lklist.o 3 | #定义当前路径 4 | CURRENT_PATH:=$(shell pwd) 5 | #定义内核版本号 6 | LINUX_KERNEL:=$(shell uname -r) 7 | #定义内核源码绝对路径 8 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 9 | #编译模块 10 | all: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 12 | #清理模块 13 | clean: 14 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 15 | 16 | -------------------------------------------------------------------------------- /ex3-lklist/lklist.c: -------------------------------------------------------------------------------- 1 | /********************************************************** 2 | * Author : ljr 3 | * Email : Liangjinrong111@163.com 4 | * Last modified : 2019-09-15 12:41 5 | * Filename : lk_list 6 | * Description : The operation of Linux Kernel List 7 | * *******************************************************/ 8 | 9 | #include //包含了常用的内核函数 10 | #include //模块必备 11 | #include //包含了宏__init和__exit，它们允许释放内核占用的内存 12 | #include //包含双链表操作函数 13 | #include //包含了kmalloc等内存分配函数 14 | 15 | #define N 100 //链表节点数 16 | struct lklist{ 17 | int data; //数据 18 | struct list_head list; //指向双链表前后节点的指针 19 | }; 20 | struct lklist lk; //头节点 21 | 22 | /** 23 | *创建内核链表 24 | *指针和变量 25 | */ 26 | void creat_lklist(void) 27 | { 28 | struct lklist *node; //定义每次申请链表节点时所用的指针 29 | int i; 30 | 31 | INIT_LIST_HEAD(&lk.list); //初始化头节点 32 | printk("\nCreating linux kernel list!\n"); 33 | //建立N个节点，依次加到链表中 34 | for(i = 0; i < N; i++) 35 | { 36 | //GFP_KERNEL是linux内存分配器的标志，标识着内存分配器将要采取的行为 37 | node = (struct lklist *)kmalloc(sizeof(struct lklist), GFP_KERNEL); 38 | node -> data = i+1; 39 | list_add_tail(&node -> list, &lk.list); 40 | printk("Node %d has added to the lklist...\n ",i+1); 41 | } 42 | } 43 | 44 | /** 45 | * 遍历内核链表 46 | * 47 | */ 48 | void traversal_lklist(void) 49 | { 50 | struct lklist *p; 51 | struct list_head *pos; 52 | int i = 1; 53 | printk("\nTraveral linux kernel list!\n"); 54 | list_for_each(pos, &lk.list) 55 | { 56 | //通过结构体成员的指针来返回结构体的指针 57 | p = list_entry(pos, struct lklist, list); 58 | printk("Node %d's data: %d\n", i, p -> data); 59 | i++; 60 | } 61 | printk("\n\n"); 62 | } 63 | 64 | /** 65 | * 删除内核链表 66 | * 删除10个节点 67 | */ 68 | void del_lklist(void) 69 | { 70 | struct list_head *n, *pos; 71 | struct lklist *p; 72 | int i=10; 73 | printk("\nDelete linux kernel list!\n"); 74 | 75 | /* 76 | * 提供一个与pos同类型的指针n 77 | * 在for循环中暂存pos下一个节点的地址 78 | * 避免因pos节点被释放而造成的断链 79 | */ 80 | list_for_each_safe(pos, n, &lk.list) 81 | { 82 | p = list_entry(pos, struct lklist, list); 83 | list_del(pos); 84 | kfree(p); 85 | printk("\nThe node has removed from the lklist...\n"); 86 | i--; 87 | if(i==0) break; 88 | } 89 | } 90 | 91 | /** 92 | * 内核入口函数 93 | * 94 | */ 95 | static int __init lklist(void) 96 | { 97 | printk("\nLinux kernel list is starting...\n\n"); 98 | creat_lklist(); //调用创建内核链表函数 99 | traversal_lklist(); //调用遍历内核链表函数 100 | del_lklist(); //调用删除内核链表函数 101 | traversal_lklist(); //调用遍历内核链表函数 102 | return 0; 103 | } 104 | 105 | /** 106 | * 内核出口函数 107 | * 108 | */ 109 | static void __exit lklist_exit(void) 110 | { 111 | printk("\nlklist is exiting...\n"); 112 | } 113 | 114 | module_init(lklist); //入口点 115 | module_exit(lklist_exit); //出口点 116 | MODULE_LICENSE("GPL"); //许可证 117 | MODULE_AUTHOR("梁金荣"); //作者信息（非必要项） 118 | MODULE_DESCRIPTION("The operation of Linux Kernel List"); //模块描述（非必要项） 119 | -------------------------------------------------------------------------------- /ex3-lklist/删除10个节点.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex3-lklist/删除10个节点.png -------------------------------------------------------------------------------- /ex3-lklist/插入100个节点.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex3-lklist/插入100个节点.png -------------------------------------------------------------------------------- /ex3-lklist/还有90个.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex3-lklist/还有90个.png -------------------------------------------------------------------------------- /ex4-kernel_param/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=kernel_param.o 2 | CU_PATH:=$(shell pwd) 3 | LK:=$(shell uname -r) 4 | LK_PATH:=/usr/src/linux-headers-$(LK) 5 | all: 6 | make -C $(LK_PATH) M=$(CU_PATH) modules 7 | clean: 8 | make -C $(LK_PATH) M=$(CU_PATH) clean 9 | -------------------------------------------------------------------------------- /ex4-kernel_param/kernel_param.c: -------------------------------------------------------------------------------- 1 | /********************************************************** 2 | * Author : 梁金荣 3 | * Email : Liangjinrong111@163.com 4 | * Last modified : 2019-09-14 13:00 5 | * Filename : exnum.c 6 | * Description : 模块初始化函数中求最大数（使用内核中的代码） 7 | * *******************************************************/ 8 | 9 | /** 10 | *必要的头文件 11 | */ 12 | #include 13 | #include 14 | #include 15 | 16 | static int a,b ; 17 | module_param(a, int, 0644); 18 | MODULE_PARM_DESC(a, "data of a"); 19 | module_param(b, int, 0644); 20 | MODULE_PARM_DESC(b, "data of b"); 21 | /** 22 | *模块的初始化函数，模块的入口函数，加载模块，需超级用户权限 23 | */ 24 | static int __init lk_exnum(void) 25 | { 26 | printk("Linux kernel param max number module is starting here！\n"); 27 | printk("a = %d, b = %d\n", a, b); 28 | printk("max=%d\n", max(a,b)); 29 | return 0; 30 | } 31 | 32 | /** 33 | *出口函数，卸载模块，需超级用户权限 34 | */ 35 | static void __exit lk_exit(void) 36 | { 37 | printk("Linux kernel param max number moudle has exited!\n"); 38 | } 39 | 40 | module_init(lk_exnum); //内核入口点，调用初始化函数，包含在module.h中 41 | module_exit(lk_exit); //出口点 42 | MODULE_LICENSE("GPL"); //许可证 43 | MODULE_AUTHOR("ljr"); //作者（非必须） 44 | MODULE_DESCRIPTION("Linux kernel param max number"); //模块描述（非必须） 45 | 46 | -------------------------------------------------------------------------------- /ex4-kernel_param/查看结果.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex4-kernel_param/查看结果.png -------------------------------------------------------------------------------- /ex4-kernel_param/输入参数.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex4-kernel_param/输入参数.png -------------------------------------------------------------------------------- /ex5-Makefile2file/Makefile: -------------------------------------------------------------------------------- 1 | 2 | hello-objs+=hello1.o hello2.o 3 | 4 | obj-m:=hello.o 5 | CU_PATH:=$(shell pwd) 6 | LK:=$(shell uname -r) 7 | LK_PATH:=/usr/src/linux-headers-$(LK) 8 | all: 9 | make -C $(LK_PATH) M=$(CU_PATH) modules 10 | clean: 11 | make -C $(LK_PATH) M=$(CU_PATH) clean 12 | -------------------------------------------------------------------------------- /ex5-Makefile2file/hello1.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | 5 | int __init lk_hello1(void) 6 | { 7 | printk("hello,i am the first module!\n"); 8 | return 0; 9 | } 10 | void __exit lk_exit1(void) 11 | { 12 | printk("good bye,the first module !\n"); 13 | 14 | } 15 | //module_init(lk_hello1); 16 | //module_exit(lk_exit1); 17 | MODULE_LICENSE("GPL"); 18 | 19 | -------------------------------------------------------------------------------- /ex5-Makefile2file/hello2.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | extern int lk_hello1(void); 5 | extern void lk_exit1(void); 6 | static int __init lk_hello2(void) 7 | { 8 | lk_hello1(); 9 | printk("hello,i an the second module!\n"); 10 | return 0; 11 | } 12 | static void __exit lk_exit2(void) 13 | { 14 | lk_exit1(); 15 | printk("good bye,the second module!\n"); 16 | 17 | } 18 | module_init(lk_hello2); 19 | module_exit(lk_exit2); 20 | MODULE_LICENSE("GPL"); 21 | 22 | -------------------------------------------------------------------------------- /ex5-Makefile2file/运行结果.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex5-Makefile2file/运行结果.png -------------------------------------------------------------------------------- /ex6-rbtree/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=rbtree.o 2 | CU_PATH:=$(shell pwd) 3 | LK:=$(shell uname -r) 4 | LK_PATH:=/usr/src/linux-headers-$(LK) 5 | all: 6 | make -C $(LK_PATH) M=$(CU_PATH) modules 7 | clean: 8 | make -C $(LK_PATH) M=$(CU_PATH) clean 9 | -------------------------------------------------------------------------------- /ex6-rbtree/rbtree.c: -------------------------------------------------------------------------------- 1 | /********************************************************** 2 | * Author : 梁金荣 3 | * Email : Liangjinrong111@163.com 4 | * Last modified : 2019-09-21 23:21 5 | * Filename : rbtree.c 6 | * Description : Using rbtree 7 | * *******************************************************/ 8 | 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | 17 | MODULE_AUTHOR("ljr"); 18 | MODULE_DESCRIPTION("Using rbtree"); 19 | MODULE_LICENSE("GPL"); 20 | 21 | struct mytype { 22 | struct rb_node node; 23 | int key; 24 | }; 25 | 26 | struct rb_root mytree = RB_ROOT; 27 | 28 | struct mytype *my_search(struct rb_root *root, int new) 29 | { 30 | struct rb_node *node = root->rb_node; 31 | 32 | while (node) { 33 | struct mytype *data = container_of(node, struct mytype, node); 34 | 35 | if (data->key > new) 36 | node = node->rb_left; 37 | else if (data->key < new) 38 | node = node->rb_right; 39 | else 40 | return data; 41 | } 42 | return NULL; 43 | } 44 | 45 | int my_insert(struct rb_root *root, struct mytype *data) 46 | { 47 | struct rb_node **new = &(root->rb_node), *parent=NULL; 48 | 49 | /* Figure out where to put new node */ 50 | while (*new) { 51 | struct mytype *this = container_of(*new, struct mytype, node); 52 | 53 | parent = *new; 54 | if (this->key > data->key) 55 | new = &((*new)->rb_left); 56 | else if (this->key < data->key) { 57 | new = &((*new)->rb_right); 58 | } else 59 | return -1; 60 | } 61 | 62 | /* Add new node and rebalance tree. */ 63 | rb_link_node(&data->node, parent, new); 64 | rb_insert_color(&data->node, root); 65 | 66 | return 0; 67 | } 68 | 69 | 70 | static int __init my_init(void) 71 | { 72 | int i; 73 | struct mytype *data; 74 | struct rb_node *node; 75 | printk("The rbtree kernel is starting!\n"); 76 | for (i =0; i < 10; i++) { 77 | data = kmalloc(sizeof(struct mytype), GFP_KERNEL); 78 | data->key = i+1; 79 | my_insert(&mytree, data); 80 | } 81 | 82 | /*list all tree*/ 83 | for (node = rb_first(&mytree); node; node = rb_next(node)) 84 | printk("data=%d\n", rb_entry(node, struct mytype, node)->key); 85 | 86 | return 0; 87 | } 88 | 89 | static void __exit my_exit(void) 90 | { 91 | struct mytype *data; 92 | struct rb_node *node; 93 | printk("The rbtree kernel is exiting!\n"); 94 | for (node = rb_first(&mytree); node; node = rb_next(node)) { 95 | data = rb_entry(node, struct mytype, node); 96 | if (data) { 97 | rb_erase(&data->node, &mytree); 98 | kfree(data); 99 | } 100 | } 101 | } 102 | module_init(my_init); 103 | module_exit(my_exit); 104 | 105 | -------------------------------------------------------------------------------- /ex6-rbtree/运行结果.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex6-rbtree/运行结果.png -------------------------------------------------------------------------------- /ex7-ForkAndClone/fork_test: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/ljrcore/LearningLinuxKernel/0bb373f091335d7669fc30e96cd3f5712556bb77/ex7-ForkAndClone/fork_test -------------------------------------------------------------------------------- /ex7-ForkAndClone/fork_test.c: -------------------------------------------------------------------------------- 1 | #define _GNU_SOURCE 2 | #include //clone()相关 3 | #include 4 | #include 5 | #include 6 | #include //fork()相关 7 | #include 8 | #include 9 | #include 10 | 11 | int param = 0; 12 | 13 | int thread_fn(void *data) 14 | { 15 | int j; 16 | printf("starting child thread_fn, pid=%d\n", getpid()); 17 | for (j = 0; j < 10; j++) { 18 | param = j + 1000; 19 | sleep(1); 20 | printf("child thread running: j=%d, param=%d secs\n", j,param); 21 | } 22 | printf("child thread_fn exit\n"); 23 | return 0; 24 | } 25 | 26 | int main(int argc, char **argv) 27 | { 28 | int j, tid, pagesize, stacksize; 29 | void *stack; 30 | 31 | printf("starting parent process, pid=%d\n", getpid()); 32 | 33 | pagesize = getpagesize(); 34 | stacksize = 4 * pagesize; 35 | 36 | posix_memalign(&stack, pagesize, stacksize); 37 | 38 | printf("Setting a clone child thread with stacksize = %d....", stacksize); 39 | tid = clone(thread_fn, (char *)stack + stacksize, CLONE_VM | SIGCHLD, 0); 40 | printf(" with tid=%d\n", tid); 41 | if (tid < 0) 42 | exit(EXIT_FAILURE); 43 | 44 | for (j = 0; j < 6; j++) { 45 | param = j; 46 | sleep(1); 47 | printf("parent running: j=%d, param=%d secs\n", j,param); 48 | } 49 | printf("parent killitself\n"); 50 | exit(EXIT_SUCCESS); 51 | } 52 | 53 | 54 | -------------------------------------------------------------------------------- /ex8-KernelThread/.kthread.o.d: -------------------------------------------------------------------------------- 1 | kthread.o: \ 2 | /home/ljr/GitHub/LearningLinuxKernel/ex8_KernelThread/kthread.c \ 3 | include/linux/kconfig.h include/generated/autoconf.h \ 4 | include/linux/compiler_types.h include/linux/compiler-gcc.h \ 5 | include/linux/module.h include/linux/list.h include/linux/types.h \ 6 | include/uapi/linux/types.h arch/x86/include/uapi/asm/types.h \ 7 | include/uapi/asm-generic/types.h include/asm-generic/int-ll64.h \ 8 | include/uapi/asm-generic/int-ll64.h \ 9 | arch/x86/include/uapi/asm/bitsperlong.h \ 10 | include/asm-generic/bitsperlong.h include/uapi/asm-generic/bitsperlong.h \ 11 | include/uapi/linux/posix_types.h include/linux/stddef.h \ 12 | include/uapi/linux/stddef.h include/linux/compiler_types.h \ 13 | arch/x86/include/asm/posix_types.h \ 14 | arch/x86/include/uapi/asm/posix_types_64.h \ 15 | include/uapi/asm-generic/posix_types.h include/linux/poison.h \ 16 | include/linux/const.h include/uapi/linux/const.h include/linux/kernel.h \ 17 | /usr/lib/gcc/x86_64-linux-gnu/7/include/stdarg.h include/linux/linkage.h \ 18 | include/linux/stringify.h include/linux/export.h \ 19 | arch/x86/include/asm/linkage.h include/linux/compiler.h \ 20 | arch/x86/include/asm/barrier.h arch/x86/include/asm/alternative.h \ 21 | arch/x86/include/asm/asm.h arch/x86/include/asm/nops.h \ 22 | include/asm-generic/barrier.h include/linux/kasan-checks.h \ 23 | include/linux/bitops.h arch/x86/include/asm/bitops.h \ 24 | arch/x86/include/asm/rmwcc.h include/asm-generic/bitops/find.h \ 25 | include/asm-generic/bitops/sched.h arch/x86/include/asm/arch_hweight.h \ 26 | arch/x86/include/asm/cpufeatures.h \ 27 | arch/x86/include/asm/required-features.h \ 28 | arch/x86/include/asm/disabled-features.h \ 29 | include/asm-generic/bitops/const_hweight.h \ 30 | include/asm-generic/bitops/le.h arch/x86/include/uapi/asm/byteorder.h \ 31 | include/linux/byteorder/little_endian.h \ 32 | include/uapi/linux/byteorder/little_endian.h include/linux/swab.h \ 33 | include/uapi/linux/swab.h arch/x86/include/uapi/asm/swab.h \ 34 | include/linux/byteorder/generic.h \ 35 | include/asm-generic/bitops/ext2-atomic-setbit.h include/linux/log2.h \ 36 | include/linux/typecheck.h include/linux/printk.h include/linux/init.h \ 37 | include/linux/kern_levels.h include/linux/cache.h \ 38 | include/uapi/linux/kernel.h include/uapi/linux/sysinfo.h \ 39 | arch/x86/include/asm/cache.h include/linux/dynamic_debug.h \ 40 | include/linux/jump_label.h arch/x86/include/asm/jump_label.h \ 41 | include/linux/build_bug.h include/linux/stat.h \ 42 | arch/x86/include/uapi/asm/stat.h include/uapi/linux/stat.h \ 43 | include/linux/time.h include/linux/seqlock.h include/linux/spinlock.h \ 44 | include/linux/preempt.h arch/x86/include/asm/preempt.h \ 45 | arch/x86/include/asm/percpu.h include/asm-generic/percpu.h \ 46 | include/linux/threads.h include/linux/percpu-defs.h \ 47 | include/linux/thread_info.h include/linux/bug.h \ 48 | arch/x86/include/asm/bug.h include/asm-generic/bug.h \ 49 | include/linux/restart_block.h include/linux/time64.h \ 50 | include/linux/math64.h arch/x86/include/asm/div64.h \ 51 | include/asm-generic/div64.h include/uapi/linux/time.h \ 52 | arch/x86/include/asm/current.h arch/x86/include/asm/thread_info.h \ 53 | arch/x86/include/asm/page.h arch/x86/include/asm/page_types.h \ 54 | include/linux/mem_encrypt.h arch/x86/include/asm/mem_encrypt.h \ 55 | arch/x86/include/uapi/asm/bootparam.h include/linux/screen_info.h \ 56 | include/uapi/linux/screen_info.h include/linux/apm_bios.h \ 57 | include/uapi/linux/apm_bios.h include/uapi/linux/ioctl.h \ 58 | arch/x86/include/uapi/asm/ioctl.h include/asm-generic/ioctl.h \ 59 | include/uapi/asm-generic/ioctl.h include/linux/edd.h \ 60 | include/uapi/linux/edd.h arch/x86/include/asm/ist.h \ 61 | arch/x86/include/uapi/asm/ist.h include/video/edid.h \ 62 | include/uapi/video/edid.h arch/x86/include/asm/page_64_types.h \ 63 | arch/x86/include/asm/kaslr.h arch/x86/include/asm/page_64.h \ 64 | include/linux/range.h include/asm-generic/memory_model.h \ 65 | include/linux/pfn.h include/asm-generic/getorder.h \ 66 | arch/x86/include/asm/cpufeature.h arch/x86/include/asm/processor.h \ 67 | arch/x86/include/asm/processor-flags.h \ 68 | arch/x86/include/uapi/asm/processor-flags.h \ 69 | arch/x86/include/asm/math_emu.h arch/x86/include/asm/ptrace.h \ 70 | arch/x86/include/asm/segment.h arch/x86/include/uapi/asm/ptrace.h \ 71 | arch/x86/include/uapi/asm/ptrace-abi.h \ 72 | arch/x86/include/asm/paravirt_types.h arch/x86/include/asm/desc_defs.h \ 73 | arch/x86/include/asm/kmap_types.h include/asm-generic/kmap_types.h \ 74 | arch/x86/include/asm/pgtable_types.h \ 75 | arch/x86/include/asm/pgtable_64_types.h arch/x86/include/asm/sparsemem.h \ 76 | include/asm-generic/pgtable-nop4d.h arch/x86/include/asm/nospec-branch.h \ 77 | arch/x86/include/asm/alternative-asm.h arch/x86/include/asm/msr-index.h \ 78 | arch/x86/include/asm/spinlock_types.h \ 79 | include/asm-generic/qspinlock_types.h \ 80 | include/asm-generic/qrwlock_types.h include/asm-generic/ptrace.h \ 81 | arch/x86/include/uapi/asm/sigcontext.h arch/x86/include/asm/msr.h \ 82 | arch/x86/include/asm/msr-index.h arch/x86/include/uapi/asm/errno.h \ 83 | include/uapi/asm-generic/errno.h include/uapi/asm-generic/errno-base.h \ 84 | arch/x86/include/asm/cpumask.h include/linux/cpumask.h \ 85 | include/linux/bitmap.h include/linux/string.h \ 86 | include/uapi/linux/string.h arch/x86/include/asm/string.h \ 87 | arch/x86/include/asm/string_64.h arch/x86/include/uapi/asm/msr.h \ 88 | arch/x86/include/asm/atomic.h arch/x86/include/asm/cmpxchg.h \ 89 | arch/x86/include/asm/cmpxchg_64.h arch/x86/include/asm/atomic64_64.h \ 90 | include/asm-generic/atomic-instrumented.h \ 91 | include/linux/tracepoint-defs.h include/linux/atomic.h \ 92 | include/asm-generic/atomic-long.h include/linux/static_key.h \ 93 | arch/x86/include/asm/paravirt.h arch/x86/include/asm/frame.h \ 94 | arch/x86/include/asm/special_insns.h arch/x86/include/asm/fpu/types.h \ 95 | arch/x86/include/asm/unwind_hints.h arch/x86/include/asm/orc_types.h \ 96 | include/linux/personality.h include/uapi/linux/personality.h \ 97 | include/linux/err.h include/linux/irqflags.h \ 98 | arch/x86/include/asm/irqflags.h include/linux/bottom_half.h \ 99 | include/linux/spinlock_types.h include/linux/lockdep.h \ 100 | include/linux/rwlock_types.h arch/x86/include/asm/spinlock.h \ 101 | arch/x86/include/asm/qspinlock.h include/asm-generic/qspinlock.h \ 102 | arch/x86/include/asm/qrwlock.h include/asm-generic/qrwlock.h \ 103 | include/linux/rwlock.h include/linux/spinlock_api_smp.h \ 104 | include/linux/rwlock_api_smp.h include/linux/time32.h \ 105 | include/linux/uidgid.h include/linux/highuid.h include/linux/kmod.h \ 106 | include/linux/umh.h include/linux/gfp.h include/linux/mmdebug.h \ 107 | include/linux/mmzone.h include/linux/wait.h include/uapi/linux/wait.h \ 108 | include/linux/numa.h include/linux/nodemask.h \ 109 | include/linux/pageblock-flags.h include/linux/page-flags-layout.h \ 110 | include/generated/bounds.h include/linux/memory_hotplug.h \ 111 | include/linux/notifier.h include/linux/errno.h \ 112 | include/uapi/linux/errno.h include/linux/mutex.h \ 113 | include/linux/osq_lock.h include/linux/debug_locks.h \ 114 | include/linux/rwsem.h arch/x86/include/asm/rwsem.h include/linux/srcu.h \ 115 | include/linux/rcupdate.h include/linux/rcutree.h \ 116 | include/linux/workqueue.h include/linux/timer.h include/linux/ktime.h \ 117 | include/linux/jiffies.h include/linux/timex.h include/uapi/linux/timex.h \ 118 | include/uapi/linux/param.h arch/x86/include/uapi/asm/param.h \ 119 | include/asm-generic/param.h include/uapi/asm-generic/param.h \ 120 | arch/x86/include/asm/timex.h arch/x86/include/asm/tsc.h \ 121 | include/generated/timeconst.h include/linux/timekeeping.h \ 122 | include/linux/timekeeping32.h include/linux/debugobjects.h \ 123 | include/linux/rcu_segcblist.h include/linux/srcutree.h \ 124 | include/linux/rcu_node_tree.h include/linux/completion.h \ 125 | arch/x86/include/asm/mmzone.h arch/x86/include/asm/mmzone_64.h \ 126 | arch/x86/include/asm/smp.h arch/x86/include/asm/mpspec.h \ 127 | arch/x86/include/asm/mpspec_def.h arch/x86/include/asm/x86_init.h \ 128 | arch/x86/include/asm/apicdef.h arch/x86/include/asm/apic.h \ 129 | arch/x86/include/asm/fixmap.h arch/x86/include/asm/acpi.h \ 130 | include/acpi/pdc_intel.h arch/x86/include/asm/numa.h \ 131 | arch/x86/include/asm/topology.h include/asm-generic/topology.h \ 132 | arch/x86/include/asm/mmu.h arch/x86/include/asm/realmode.h \ 133 | arch/x86/include/asm/io.h arch/x86/include/generated/asm/early_ioremap.h \ 134 | include/asm-generic/early_ioremap.h include/asm-generic/iomap.h \ 135 | include/asm-generic/pci_iomap.h include/xen/xen.h \ 136 | include/xen/interface/xen.h arch/x86/include/asm/xen/interface.h \ 137 | arch/x86/include/asm/xen/interface_64.h \ 138 | arch/x86/include/asm/pvclock-abi.h arch/x86/include/asm/xen/hypervisor.h \ 139 | include/asm-generic/io.h include/linux/logic_pio.h \ 140 | include/linux/fwnode.h include/linux/vmalloc.h include/linux/llist.h \ 141 | include/linux/rbtree.h include/linux/overflow.h \ 142 | arch/x86/include/uapi/asm/vsyscall.h include/asm-generic/fixmap.h \ 143 | arch/x86/include/asm/hardirq.h arch/x86/include/asm/io_apic.h \ 144 | arch/x86/include/asm/irq_vectors.h include/linux/topology.h \ 145 | include/linux/smp.h include/linux/percpu.h include/linux/sysctl.h \ 146 | include/uapi/linux/sysctl.h include/linux/elf.h \ 147 | arch/x86/include/asm/elf.h arch/x86/include/asm/user.h \ 148 | arch/x86/include/asm/user_64.h arch/x86/include/uapi/asm/auxvec.h \ 149 | arch/x86/include/asm/vdso.h include/linux/mm_types.h \ 150 | include/linux/mm_types_task.h arch/x86/include/asm/tlbbatch.h \ 151 | include/linux/auxvec.h include/uapi/linux/auxvec.h \ 152 | include/linux/uprobes.h arch/x86/include/asm/uprobes.h \ 153 | include/uapi/linux/elf.h include/uapi/linux/elf-em.h \ 154 | include/linux/kobject.h include/linux/sysfs.h include/linux/kernfs.h \ 155 | include/linux/idr.h include/linux/radix-tree.h \ 156 | include/linux/kobject_ns.h include/linux/kref.h include/linux/refcount.h \ 157 | arch/x86/include/asm/refcount.h include/linux/moduleparam.h \ 158 | include/linux/rbtree_latch.h include/linux/error-injection.h \ 159 | arch/x86/include/asm/error-injection.h \ 160 | include/asm-generic/error-injection.h arch/x86/include/asm/module.h \ 161 | include/asm-generic/module.h arch/x86/include/asm/orc_types.h \ 162 | include/linux/kthread.h include/linux/sched.h include/uapi/linux/sched.h \ 163 | include/linux/pid.h include/linux/rculist.h include/linux/sem.h \ 164 | include/uapi/linux/sem.h include/linux/ipc.h include/linux/rhashtable.h \ 165 | include/linux/jhash.h include/linux/unaligned/packed_struct.h \ 166 | include/linux/list_nulls.h include/uapi/linux/ipc.h \ 167 | arch/x86/include/uapi/asm/ipcbuf.h include/uapi/asm-generic/ipcbuf.h \ 168 | arch/x86/include/uapi/asm/sembuf.h include/linux/shm.h \ 169 | include/uapi/linux/shm.h include/uapi/asm-generic/hugetlb_encode.h \ 170 | arch/x86/include/uapi/asm/shmbuf.h include/uapi/asm-generic/shmbuf.h \ 171 | arch/x86/include/asm/shmparam.h include/linux/kcov.h \ 172 | include/uapi/linux/kcov.h include/linux/plist.h include/linux/hrtimer.h \ 173 | include/linux/timerqueue.h include/linux/seccomp.h \ 174 | include/uapi/linux/seccomp.h arch/x86/include/asm/seccomp.h \ 175 | arch/x86/include/asm/unistd.h arch/x86/include/uapi/asm/unistd.h \ 176 | arch/x86/include/generated/uapi/asm/unistd_64.h \ 177 | arch/x86/include/generated/asm/unistd_64_x32.h \ 178 | arch/x86/include/asm/ia32_unistd.h \ 179 | arch/x86/include/generated/asm/unistd_32_ia32.h \ 180 | include/asm-generic/seccomp.h include/uapi/linux/unistd.h \ 181 | include/linux/resource.h include/uapi/linux/resource.h \ 182 | arch/x86/include/uapi/asm/resource.h include/asm-generic/resource.h \ 183 | include/uapi/asm-generic/resource.h include/linux/latencytop.h \ 184 | include/linux/sched/prio.h include/linux/signal_types.h \ 185 | include/uapi/linux/signal.h arch/x86/include/asm/signal.h \ 186 | arch/x86/include/uapi/asm/signal.h \ 187 | include/uapi/asm-generic/signal-defs.h \ 188 | arch/x86/include/uapi/asm/siginfo.h include/uapi/asm-generic/siginfo.h \ 189 | include/linux/task_io_accounting.h include/uapi/linux/rseq.h \ 190 | include/linux/cgroup.h include/uapi/linux/cgroupstats.h \ 191 | include/uapi/linux/taskstats.h include/linux/fs.h \ 192 | include/linux/wait_bit.h include/linux/kdev_t.h \ 193 | include/uapi/linux/kdev_t.h include/linux/dcache.h \ 194 | include/linux/rculist_bl.h include/linux/list_bl.h \ 195 | include/linux/bit_spinlock.h include/linux/lockref.h \ 196 | include/linux/stringhash.h include/linux/hash.h include/linux/path.h \ 197 | include/linux/list_lru.h include/linux/shrinker.h include/linux/xarray.h \ 198 | include/linux/capability.h include/uapi/linux/capability.h \ 199 | include/linux/semaphore.h include/linux/fcntl.h \ 200 | include/uapi/linux/fcntl.h arch/x86/include/uapi/asm/fcntl.h \ 201 | include/uapi/asm-generic/fcntl.h include/uapi/linux/fiemap.h \ 202 | include/linux/migrate_mode.h include/linux/percpu-rwsem.h \ 203 | include/linux/rcuwait.h include/linux/rcu_sync.h \ 204 | include/linux/delayed_call.h include/linux/uuid.h \ 205 | include/uapi/linux/uuid.h include/linux/errseq.h include/linux/ioprio.h \ 206 | include/linux/sched/rt.h include/linux/iocontext.h \ 207 | include/uapi/linux/fs.h include/uapi/linux/limits.h \ 208 | include/linux/quota.h include/linux/percpu_counter.h \ 209 | include/uapi/linux/dqblk_xfs.h include/linux/dqblk_v1.h \ 210 | include/linux/dqblk_v2.h include/linux/dqblk_qtree.h \ 211 | include/linux/projid.h include/uapi/linux/quota.h \ 212 | include/linux/nfs_fs_i.h include/linux/seq_file.h include/linux/cred.h \ 213 | include/linux/key.h include/linux/assoc_array.h include/linux/selinux.h \ 214 | include/linux/sched/user.h include/linux/ratelimit.h \ 215 | include/linux/ns_common.h include/linux/nsproxy.h \ 216 | include/linux/user_namespace.h include/linux/kernel_stat.h \ 217 | include/linux/interrupt.h include/linux/irqreturn.h \ 218 | include/linux/irqnr.h include/uapi/linux/irqnr.h include/linux/hardirq.h \ 219 | include/linux/ftrace_irq.h include/linux/vtime.h \ 220 | include/linux/context_tracking_state.h arch/x86/include/asm/irq.h \ 221 | arch/x86/include/asm/sections.h include/asm-generic/sections.h \ 222 | arch/x86/include/asm/extable.h include/linux/cgroup-defs.h \ 223 | include/linux/percpu-refcount.h include/linux/u64_stats_sync.h \ 224 | include/linux/bpf-cgroup.h include/uapi/linux/bpf.h \ 225 | include/uapi/linux/bpf_common.h include/linux/cgroup_subsys.h \ 226 | include/linux/delay.h arch/x86/include/asm/delay.h \ 227 | include/asm-generic/delay.h 228 | -------------------------------------------------------------------------------- /ex8-KernelThread/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=kthread.o 2 | CURRENT_PATH:=$(shell pwd) 3 | LINUX_KERNEL:=$(shell uname -r) 4 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 5 | all: 6 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 7 | clean: 8 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 9 | -------------------------------------------------------------------------------- /ex8-KernelThread/kthread.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | 7 | static struct task_struct *tsk[NR_CPUS]; 8 | 9 | static void show_reg(void) 10 | { 11 | unsigned int cpsr, sp; 12 | 13 | asm("mrs %0, cpsr" : "=r" (cpsr) : : "cc"); 14 | asm("mov %0, sp" : "=r" (sp) : : "cc"); 15 | 16 | printk("cpsr:0x%x, sp:0x%x\n", cpsr, sp); 17 | } 18 | 19 | static void show_prio(void) 20 | { 21 | struct task_struct *task = current; 22 | 23 | printk("%s pid:%d, nice:%d prio:%d static_prio:%d normal_prio:%d\n", 24 | task->comm, task->pid, 25 | PRIO_TO_NICE(task->static_prio), 26 | task->prio, task->static_prio, 27 | task->normal_prio); 28 | } 29 | 30 | static void print_cpu(char *s) 31 | { 32 | preempt_disable(); 33 | pr_info("%s cpu=%d.\n", s, smp_processor_id()); 34 | preempt_enable(); 35 | } 36 | 37 | static int thread_fun(void *t) 38 | { 39 | do { 40 | print_cpu("SLEEP in Thread Function "); 41 | msleep_interruptible(2000); 42 | print_cpu("msleep over in Thread Function"); 43 | print_cpu("running"); 44 | show_reg(); 45 | show_prio(); 46 | } while (!kthread_should_stop()); 47 | return 0; 48 | } 49 | 50 | static int __init my_init(void) 51 | { 52 | int i; 53 | print_cpu("Loading module"); 54 | for_each_online_cpu(i) { 55 | tsk[i] = kthread_create(thread_fun, NULL, "kdemo/%d", i); 56 | if (!tsk[i]) { 57 | pr_info("Failed to generate a kernel thread\n"); 58 | return -1; 59 | } 60 | kthread_bind(tsk[i], i); 61 | pr_info("About to wake up and run the thread for cpu=%d\n", i); 62 | wake_up_process(tsk[i]); 63 | pr_info("Staring thread for cpu %d", i); 64 | print_cpu("on"); 65 | } 66 | return 0; 67 | } 68 | 69 | static void __exit my_exit(void) 70 | { 71 | int i; 72 | for_each_online_cpu(i) { 73 | pr_info(" Kill Thread %d", i); 74 | kthread_stop(tsk[i]); 75 | print_cpu("Kill was done on "); 76 | } 77 | } 78 | 79 | module_init(my_init); 80 | module_exit(my_exit); 81 | 82 | MODULE_AUTHOR("Ben ShuShu"); 83 | MODULE_LICENSE("GPL v2"); 84 | 85 | -------------------------------------------------------------------------------- /ex9-TraversePcb/Makefile: -------------------------------------------------------------------------------- 1 | obj-m:=traverse_pcb.o 2 | 3 | CURRENT_PATH:=$(shell pwd) 4 | LINUX_KERNEL:=$(shell uname -r) 5 | LINUX_KERNEL_PATH:=/usr/src/linux-headers-$(LINUX_KERNEL) 6 | 7 | all: 8 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules 9 | 10 | clean: 11 | make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean 12 | -------------------------------------------------------------------------------- /ex9-TraversePcb/traverse_pcb.c: -------------------------------------------------------------------------------- 1 | # include 2 | # include 3 | # include 4 | # include 5 | # include 6 | # include 7 | # include 8 | # include 9 | 10 | //内核模块初始化函数 11 | static int __init traverse_pcb(void) 12 | { 13 | struct task_struct *task, *p;//定义指向task_struct类型的指针 14 | struct list_head *pos;//定义双向链表指针 15 | int count=0;//定义统计系统进程个数的变量 16 | printk("Printf process'message begin:\n");//提示模块开始运行 17 | task = &init_task;//指向0号进程的PCB 18 | 19 | list_for_each(pos,&task->tasks)//使用list_for_each宏来遍历进程链表 20 | { 21 | p = list_entry(pos,struct task_struct,tasks);//指向当前进程的task_struct结构 22 | count++;//统计系统进程个数 23 | printk("\n\n");//方便查看后续打印信息 24 | /* 25 | 打印task_struct中的字段，其中pid：进程的pid号；state：进程的状态； 26 | prio:动态优先级；static_prio:静态优先级; parent'pid:父进程的pid号； 27 | count:文件系统信息，文件被使用的次数; umask:进程权限位的默认设置; 28 | 使用atomic_read原子操作是为了(p->files)->count字段计数不被打断 29 | */ 30 | printk("pid:%d; state:%lx; prio:%d; static_prio:%d; parent'pid:%d; count:%d; umask:%d;", \ 31 | p->pid,p->state,p->prio,p->static_prio,(p->parent)->pid, \ 32 | atomic_read((&(p->files)->count)),(p->fs)->umask); 33 | //打印进程地址空间的信息 34 | if((p->mm)!=NULL) 35 | printk("total_vm:%ld;",(p->mm)->total_vm);//total_vm：线性区总的页数 36 | } 37 | printk("进程的个数：%d\n",count);//打印进程个数 38 | return 0; 39 | } 40 | 41 | //内核模块退出函数 42 | static void __exit end_pcb(void) 43 | { 44 | printk("traverse pcb is end."); 45 | } 46 | module_init(traverse_pcb);//入口 47 | module_exit(end_pcb);//出口 48 | MODULE_LICENSE("GPL");//许可证 -------------------------------------------------------------------------------- /代码目录索引.md: -------------------------------------------------------------------------------- 1 | # 本仓库代码为Linux内核初学者练习代码，包含源代码、编译链接后的文件和运行结果，目录说明如下 2 | 3 | ## ex1_hello 4 | 5 | 经典的helloworld入门代码 6 | 7 | ## ex2_exnum 8 | 9 | 使用内核中的函数求最大值和最小值 10 | 11 | ## ex3_lklist 12 | 13 | 内核链表的创建、遍历，删除，并将数据打印出来 14 | 15 | ## ex4_kernel_param 16 | 17 | 内核传参 18 | 19 | ## ex5_Makefile2file 20 | 21 | Makefile编译两个以上文件 22 | 23 | ## ex6_rbtree 24 | 25 | 红黑树的应用 26 | 27 | ## ex7_ForkAndClone 28 | 29 | fork（）的应用 30 | 31 | ## ex8_KernelThread 32 | 33 | 内核线程的应用 34 | 35 | ## ex9_TraversePcb 36 | 37 | 打印进程PCB中的字段 38 | --------------------------------------------------------------------------------