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标题: proc编程（proc_create_data) [打印本页]
作者: armeasy    时间: 2014-10-21 23:18
标题: proc编程（proc_create_data)
[size=13.333333015441895px]test_main.c:
  1. #include <linux/init.h>
  2. #include <linux/module.h>
  3. #include <linux/types.h>
  4. #include <linux/slab.h>
  5. #include <linux/fs.h>
  6. #include <linux/proc_fs.h>
  7. #include <linux/seq_file.h>
  8. #include <net/net_namespace.h>
  9. #include <linux/mm.h>
  10. MODULE_LICENSE("GPL");
  11. struct _DATA_INFO{
  12.     int data1;
  13.     int data2;
  14. };
  15. static struct _DATA_INFO data_info[2];

  17. /* PROC stuff */
  18. static void *dl_seq_start(struct seq_file *s, loff_t *pos)
  19. {
  20.     static unsigned long counter = 0;
  21.     if ( *pos == 0 )
  22.     {
  23.         return &counter;
  24.     }
  25.     else
  26.     {
  27.         *pos = 0;
  28.         return NULL;
  29.     }
  30. }
  31. static void *dl_seq_next(struct seq_file *s, void *v, loff_t *pos)
  32. {
  33.     return NULL;
  34. }
  35. static void dl_seq_stop(struct seq_file *s, void *v)
  36. {
  37. }
  38. static int dl_seq_show(struct seq_file *s, void *v)
  39. {
  40.     struct proc_dir_entry *pde = s->private;
  41.     struct _DATA_INFO *info = pde->data;
  42.     seq_printf(s, "%d----%d",info->data1,info->data2);
  43.     return 0;
  44. }
  45. static struct seq_operations dl_seq_ops = {
  46.     .start = dl_seq_start,
  47.     .next = dl_seq_next,
  48.     .stop = dl_seq_stop,
  49.     .show = dl_seq_show
  50. };
  51. static int dl_proc_open(struct inode *inode, struct file *file)
  52. {
  53.     int ret = seq_open(file, &dl_seq_ops);
  54.     if (!ret) {
  55.     struct seq_file *sf = file->private_data;
  56.     sf->private = PDE(inode);
  57.     }
  58.     return ret;
  59. }
  60. static const struct file_operations dl_file_ops = {
  61.     .owner = THIS_MODULE,
  62.     .open = dl_proc_open,
  63.     .read = seq_read,
  64.     .llseek = seq_lseek,
  65.     .release = seq_release
  66. };
  67. void init_mem(void)
  68. {
  69.     data_info[0].inflow=1;
  70.     data_info[0].upflow=2;
  71.     proc_create_data("proc_test1", 0, init_net.proc_net, &dl_file_ops, &data_info[0]);
  72.     data_info[1].inflow=3;
  73.     data_info[1].upflow=4;
  74.     proc_create_data("proc_test2", 0, init_net.proc_net, &dl_file_ops, &data_info[1]);
  75. }
  76. static int __init init_mem_pool(void)
  77. {
  78.     init_mem();
  79.     return 0;
  80. }
  81. static void __exit exit_mem_pool(void)
  82. {
  83.     remove_proc_entry("proc_test1", init_net.proc_net);
  84.     remove_proc_entry("proc_test2", init_net.proc_net);
  85. }
  86. module_init(init_mem_pool);
  87. module_exit(exit_mem_pool);

  89. Makefile:
  90. TARGET = test_main
  91. CURRENT = $(shell uname -r)
  92. KDIR = /lib/modules/$(CURRENT)/build
  93. PWD = $(shell pwd)
  94. CF = *.o .*o.d .*.cmd .*.flags *.mod.c Module.* modules.* .tmp_*
  95. obj-m := $(TARGET).o
  96. default:
  97.     make -C $(KDIR) SUBDIRS=$(PWD) modules
  98. clean:
  99.     -rm -rf $(CF)
  100.     -include $(KDIR)/Rules.make
复制代码
[size=13.333333015441895px]运行：
  1. insmod test_main.ko
  2. cat /proc/net/proc_test1
  3. cat /proc/net/proc_test2
复制代码




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