Re: [Netnice-kernels] NNFS was: Re: Sourceforge Account

[Scott B. <sco...@ve...>]

Hi Takashi,

On Tue, 28 Sep 2004, Takashi Okumura wrote:

> hi scott,
> 
> i still don't understand your question. but, i think it is a good
> idea to try our bootable CD to know how it works. this is definitely
> a better specification of the API, better than the simplified description
> of the page you mentioned.

Thanks for the pointer, I had not actually run netnice. Now, I have
downloaded the ISO and run it excersizing netnice by doing telnet
localhost and examining in /proc/network and /proc/<pid>/sockets/.
Before I was working from the docs and from the FreeBSD5 source.

> but, i don't think it is a right way, to create a file system which
> contains just the directories under /proc/network of FreeBSD and
> mount it under /proc/network of linux-procfs. we need to setup a lot
> of links between process-dependent directories under /proc/PIDs and
> VIF directories under /proc/network, and thus, they cannot be separated
> that way, i believe.

Considering further and with your reply, I can see the point.  The
code that implements the interaction between the /proc/<pid>/sockets
entries and the vif interfaces under /proc/network/<interface>/<vif>
needs to be in the same kernel module.  I was originally thinking that
/proc/<pid>/sockets could be created dynamically from within the nnfs
kernel module (I think linux procfs may have this feature) but it
would probably be difficult and error prone.

I think the linux /proc/<pid> implementation is mostly contained in
the functions at the end of the file linux/fs/proc/base.c -
proc_pid_readdir, and proc_task_readdir.  I will need to investigate
further but at this point does not look too complex to extract and
port to nnfs.

> i guess that the confusion is mostly coming from the difference of
> organizations between FreeBSD-procfs and linux-procfs. and, maybe
> it is a good idea to have a tele-conference to avoid further confusion.
> we have a polycom system in my department, and i use MSN messenger
> also (ta...@ho...).
> 

I would prefer a teleconference to IM initially.  For efficiency I
would suggest we try next week maybe Wednesday or Thursday as I will
be out of town this weekend and I want to study study up on the system
some more.

As it is, I was about ready to move into implementing the mkdir
operation on the virtual directories under /network.  I am studying
the functions vif_alloc and nnfs_vncache_alloc as I think these are
the most important here, I am thinking they should port with few
changes.



Thanks,

Scott Brumbaugh