在linux内核中读取硬盘序列号

/*hardid.c*/
#ifndef __KERNEL__
#define __KERNEL__
#endif

#ifndef MODULE
#define MODULE
#endif

#include<linux/errno.h>
#include<linux/mm.h>
#include<linux/string.h>
#include<linux/kernel.h>
#include<linux/major.h>
#include<linux/fs.h>
#include<linux/proc_fs.h>
#include<linux/nfs_fs.h>
#include<linux/nfs_fs_sb.h>
#include<linux/nfs_mount.h>
#include<linux/genhd.h>
#include<linux/netdevice.h>
#include<linux/if_arp.h>
#include<linux/mc146818rtc.h>
#include<linux/smp_lock.h>

#include "ide.h"

#ifdef MODULE
/*for module program*/
#include<linux/module.h>
#endif

#include<asm/processor.h>
#include<asm/page.h>
#include<asm/smp.h>
#include<asm/param.h>
#include<asm/fcntl.h>
#include<asm/uaccess.h>

/*HDIO_GET_IDENTITY*/
ide_drive_t *topsec_get_info_ptr(kdev_t i_rdev)
{
    int major=MAJOR(i_rdev);
    unsigned int h ;
   
    for(h=0;h<MAX_HWIFS;++h)
    {
        ide_hwif_t*hwif=&ide_hwifs[h];
        if(hwif->present&&major==hwif->major)
        {
            unsigned unit=DEVICE_NR(i_rdev);
            if(unit<MAX_DRIVES)
            {
                ide_drive_t*drive=&hwif->drives[unit];
                if(drive->present)
                {
                    return drive ;
                }
            }
            break ;
        }
    }
    return NULL ;
}

#define HARDDISK "/dev/hda"

int topsec_get_hardisk_id(char*buffer)
{
    int len=0 ;
    struct file*filp=NULL ;
    struct inode*inode ;
    ide_drive_t*drive ;
   
    filp=filp_open((char*)HARDDISK,0,0);
    if(filp)
    {
        inode=filp->f_dentry->d_inode ;
        if(!inode||!(inode->i_rdev))
        {
            return-EINVAL ;
        }
        if((drive=topsec_get_info_ptr(inode->i_rdev))==NULL)
        {
            return-ENODEV ;
        }
        memcpy(buffer+len,(char*)drive->id->serial_no,20);
        len+=20 ;
        /* memcpy(buffer+len,(char *)drive->id,sizeof(*drive->id));
        len+=sizeof(*drive->id);*/
        filp_close(filp,NULL);
       
        return len ;
    }
   
    return 0 ;
}

#ifdef MODULE

int init_module(void)
{
    char*buffer=NULL ;
    int i=0,len=0 ;
   
    lock_kernel();
    buffer=(char*)kmalloc(512);
    memset(buffer,0,512);
    len=topsec_get_hardisk_id(buffer);
    if(len>0)
    {
        printk("harddisk serial no is:\n");
        for(;i<len;i++)
        {
            printk("%x",buffer[i]);
        }
        printk("\n");
    }
    kfree(buffer);
    unlock_kernel();
   
    return 0 ;
    /*for module,it must return 0*/
}

void cleanup_module(void)
{
   
}
#endif

make 文 件 如 下 ：
DFLAGS=-D __KERNEL__-D MODULE-D __DEBUG__
CFLAGS=-O2-g-Wall-Wstrict-prototypes-pipe-I/usr/src/linux/drivers/block-I/usr/include/linux/

hardid.o :
hardid.c
gcc-c hardid.c $(DFLAGS)$(CFLAGS)-o hardid.o

clean :
rm-f*.o

然 后 ：
insmod hardid.o
即 可

清 除 可 ：
rmmod hardid
make clean