netdev - Re: [PATCH] Force UNIX domain sockets to be built in

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Date:	Mon, 31 Dec 2007 14:23:01 +0100
From:	devzero@....de
To:	7eggert@....de, David Miller <davem@...emloft.net>
Cc:	bunk@...nel.org, jengelh@...putergmbh.de,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] Force UNIX domain sockets to be built in

when i had that module modular and added to the initrd, udev didn`t work, though.
same error message:

udevd[1226]: init_udev_socket: error getting socket: Address family not supported by protocol 

not sure if i did a mistake here....

anyway, this message is not obvious to the end user.

i like the kernel being modular, but i also like it if things "just work" - and with "allmodconfig", modular UNIX domain sockets seem to create hassle.
(see http://forums.gentoo.org/viewtopic-t-476363-highlight-.html or http://forums.gentoo.org/viewtopic-t-463793-highlight-.html )

so, if this patch is being rejected, maybe it would be useful if udev would give a proper hint, if it`s missing this kernel feature. 

btw, udev documentation telling this:

  - The kernel must have sysfs, unix domain sockets and networking enabled.
    (unix domain sockets (CONFIG_UNIX) as a loadable kernel module may work,
    but it is completely silly - don't complain if anything goes wrong.)

furthermore, if this needs to be modular, then i`d please have tcp/ip networking modular, too. :)

regards
roland

ps:
not being a skilled programmer, so this is mostly an admins/users perspective.

> 
> From: Bodo Eggert <7eggert@....de>
> Date: Mon, 31 Dec 2007 13:09:43 +0100 (CET)
> 
> > As suggested by Adrian Bunk, UNIX domain sockets should always be built in 
> > on normal systems. This is especially true since udev needs these sockets
> > and fails to run if UNIX=m.
> > 
> > Signed-Off-By: Bodo Eggert <7eggert@....de>
> 
> People who use udev can make sure they have it built into their kernel
> if they have such a dependency.
> 
> Not everyone uses udev, and therefore needs AF_UNIX non-modular.
> 
> I keep seeing this crap patch get submitted and I'm going to keep
> dropping it because it's bogus.
> 
> It seems to stem from some filesystem interface or whatever that the
> VFS folks don't want to export or one they want to now stop exporting.
> 
> But that is a really cruddy reason to want to force AF_UNIX to not
> be allowed to be modular, and the udev thing just makes it more of a
> joke rather than a good technical reason.
> 

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