以下模块打印出超级块中某些字段的内容

Posted 2020-12-29 lucelujiaming

以下模块打印出超级块中某些字段的内容。

 

#include <linux/module.h>

#include <linux/fs.h>

#include <linux/init.h>

#include <linux/list.h>

#include <linux/spinlock.h>

#include <linux/kdev_t.h>

#define SUPER_BLOCKS_ADDRESS 0xc048db0c // from /proc/kallsyms

#define SB_LOCK_ADDRESS      0xc05b2440 //  from /proc/kallsyms

static int __init sbinfo_init(void)

{

    struct super_block *sb;

    struct list_head *pos;

    printk("sb:%d/tinode:%d/n",sizeof(struct super_block),sizeof(struct inode));

    printk("/nprint file_sys_type:/n");

    spin_lock((spinlock_t *)SB_LOCK_ADDRESS);

    list_for_each(pos, (struct list_head *)SUPER_BLOCKS_ADDRESS) {

        sb = list_entry(pos, struct super_block, s_list);

        printk("dev_t:%d:%d  ", MAJOR(sb->s_dev),MINOR(sb->s_dev));

        printk("count:%d  file_type name:%s/n", sb->s_count, sb->s_type->name);

    }

    spin_unlock((spinlock_t *)SB_LOCK_ADDRESS);

    return 0;

}

 

static void __exit sbinfo_exit(void)

{

    printk("unloading..../n");

}

 

module_init(auditfs_init);

module_exit(auditfs_exit);

MODULE_LICENSE("GPL");