linux-kernel - How to mount own file system in linux

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Date:	Wed, 19 Jul 2006 14:19:31 +0530
From:	Chinmaya Mishra <chinmaya4@...il.com>
To:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: How to mount own file system in linux

Hi all,
        I want to create new file system in linux 2.6.10 kernel just to 
print the super block information.
Can you suggest me where I can get some good documents to proceed or any 
dummy code if any.

I have tried this with the following code but it gives some warning 
messages during compilation. The file system is registered but during 
the mount command segmentation fault occurs.

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
#include <linux/fs.h>
#include <linux/sched.h>

static struct super_block *rfs_read_super( struct super_block *sb, void 
*buf, int size);
static struct file_system_type rfs = {"rfs", 0, rfs_read_super, NULL};
/*--------------------------------------------------------------------------------------------*/ 

static struct super_block *rfs_read_super( struct super_block *sb, void 
*buf, int size) {
       printk("rkfs: read_super returning a valid super_block\n" );
       sb->s_blocksize = 1024;
       sb->s_blocksize_bits = 10;
       return sb;
}
/*--------------------------------------------------------------------------------------------*/ 

int init_module(void) {
       int err;
       err = register_filesystem(&rfs);
       printk("rkfs: file system registered\n" );
       return err;
}
/*--------------------------------------------------------------------------------------------*/ 

void cleanup_module(void) {
       unregister_filesystem(&rfs);
       printk("rkfs: file system unregistered\n" );
}
/*--------------------------------------------------------------------------------------------*/ 

MODULE_LICENSE("GPL");

regards,
chinmaya

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