Re: How VFS interacts with a file driver

[Daniel Phillips]

On Monday 14 May 2001 07:29, Blesson Paul wrote:
> Hi
>                I am trying to implement a distributed file system.
> For that I write a file driver. I want to know the following things
>
> 1 . If I am writing a new file system, is it necessary to modify the
> existing structs including inode struct.
> 2 . If it is not needed, will a simple registration of the file
> system is needed to mount the file system
>                 More over I am new to this area. I am doing as my
> graduate project. I need someones help to crack the working of VFS
> Thanks in advance

1. In .config, change CONFIG_EXT2_FS to 'm'
2. change "ext2" to "newfs" at DECLARE_FSTYPE_DEV in super.c
3. make modules SUBDIRS=fs/ext2
4. insmod fs/ext2/ext2.o

Poof!  New filesystem.  (cat /proc/filesystems) Don't forget to change 
ext2 in .config back to "y" before you build your next kernel.  You'll 
need to study the kernel *hard* before you can expect to have half a 
chance of having your filesystem work properly.  Go here:

  http://lksr.org

and here:

  http://kernelnewbies.org

--
Daniel