Pointers for understanding vfs/buffer/filesystem architecture

[Eric Anderson]

Ryan Sommers wrote:
> Eric Anderson wrote:
> 
>> I've very interested in learning about FreeBSD's implementation of 
>> vfs/buffer cache/fs archicture.  I've read through mckusick@'s chapter 
>> in the Design and Implmentation of FreeBSD book, and I've read the 
>> UNIX Filesystems book cover to cover.
>>
>> What I'd like to see/read/understand, is how FreeBSD in particular is 
>> put together in this regard, and then I'd like to go about writing a 
>> very very simple filesystem as a learning excercise.
>>
>> Can anyone give me some pointers?  Would anyone be willing to guide me 
>> along in my quest by answering questions (off list if preferred, or on 
>> list), etc?
>>
>> Thanks in advance for the hints/input!
>> Eric
>>
>>
> 
> Best place would be the source code itself. I think the nullfs 
> implementation would be a good place (src/sys/fs/nullfs). I thought I 
> also remembered some little article on writing an FS for freebsd, 
> finding it is eluding me though.

Thanks - I've begun tinkering with a copy of nullfs.

If you can find that article, please let me know - I've looked and still 
cannot track it down.

Eric



-- 
------------------------------------------------------------------------
Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
------------------------------------------------------------------------