Welcome to Linux Knowledge Base and Tutorial
"The place where you learn linux"
The ONE Campaign to make poverty history

 Create an AccountHome | Submit News | Your Account  

Tutorial Menu
Linux Tutorial Home
Table of Contents
Up to --> Files and File Systems

· The Virtual File System
· The VFS Superblock
· The VFS Inode
· Registering the File System
· Mounting a File System
· Unmounting a File System
· The VFS Inode Cache
· The Directory Cache

Glossary
MoreInfo
Man Pages
Linux Topics
Test Your Knowledge

Site Menu
Site Map
FAQ
Copyright Info
Terms of Use
Privacy Info
Disclaimer
WorkBoard
Thanks
Donations
Advertising
Masthead / Impressum
Your Account

Communication
Feedback
Forums
Private Messages
Recommend Us
Surveys

Features
HOWTOs
News
News Archive
Submit News
Topics
User Articles
Web Links

Google
Google


The Web
linux-tutorial.info

Who's Online
There are currently, 197 guest(s) and 6 member(s) that are online.

You are an Anonymous user. You can register for free by clicking here

  
Linux Tutorial - The Operating System - Files and File Systems - The Virtual File System - Registering the File System
  The VFS Inode ---- Mounting a File System  


Registering the File Systems


Figure: Registered File Systems

When you build the Linux kernel you are asked if you want each of the supported file systems. When the kernel is built, the file system startup code contains calls to the initialisation routines of all of the built in file systems.

Linux file systems may also be built as modules and, in this case, they may be demand loaded as they are needed or loaded by hand using insmod. Whenever a file system module is loaded it registers itself with the kernel and unregisters itself when it is unloaded. Each file system's initialisation routine registers itself with the Virtual File System and is represented by a file_system_type data structure which contains the name of the file system and a pointer to its VFS superblock read routine. The figure above shows that the file_system_type data structures are put into a list pointed at by the file_systems pointer. Each file_system_type data structure contains the following information:

Superblock read routine
This routine is called by the VFS when an instance of the file system is mounted,
File System name
The name of this file system, for example ext2,
Device needed
Does this file system need a device to support? Not all file system need a device to hold them. The /proc file system, for example, does not require a block device,

You can see which file systems are registered by looking in at /proc/filesystems. For example, on my system it looks like this:

nodev   rootfs
nodev   bdev
nodev   proc
nodev   sockfs
nodev   tmpfs
nodev   shm
nodev   pipefs
        ext2
        minix
        iso9660
nodev   nfs
nodev   devpts
        reiserfs
nodev   capifs
nodev   usbdevfs

 Previous Page
The VFS Inode
  Back to Top
Table of Contents
Next Page 
Mounting a File System


MoreInfo

Test Your Knowledge

User Comments:


You can only add comments if you are logged in.

Copyright 1996-1999 by David Rusling. Licensed under GNU General Public License (Used with permission of the author). See here for details. All rights reserved.
  

More information about the site can be found in the FAQ


Login
Nickname

Password

Security Code
Security Code
Type Security Code


Don't have an account yet? You can create one. As a registered user you have some advantages like theme manager, comments configuration and post comments with your name.

Help if you can!


Amazon Wish List

Did You Know?
The Linux Tutorial can use your help.


Friends



Tell a Friend About Us

Bookmark and Share



Web site powered by PHP-Nuke

Is this information useful? At the very least you can help by spreading the word to your favorite newsgroups, mailing lists and forums.
All logos and trademarks in this site are property of their respective owner. The comments are property of their posters. Articles are the property of their respective owners. Unless otherwise stated in the body of the article, article content (C) 1994-2013 by James Mohr. All rights reserved. The stylized page/paper, as well as the terms "The Linux Tutorial", "The Linux Server Tutorial", "The Linux Knowledge Base and Tutorial" and "The place where you learn Linux" are service marks of James Mohr. All rights reserved.
The Linux Knowledge Base and Tutorial may contain links to sites on the Internet, which are owned and operated by third parties. The Linux Tutorial is not responsible for the content of any such third-party site. By viewing/utilizing this web site, you have agreed to our disclaimer, terms of use and privacy policy. Use of automated download software ("harvesters") such as wget, httrack, etc. causes the site to quickly exceed its bandwidth limitation and are therefore expressly prohibited. For more details on this, take a look here

PHP-Nuke Copyright © 2004 by Francisco Burzi. This is free software, and you may redistribute it under the GPL. PHP-Nuke comes with absolutely no warranty, for details, see the license.
Page Generation: 0.02 Seconds