linux-kernel - Re: autofs: make the autofsv5 packet file descriptor use a packetized pipe

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Message-ID: <4F9EF297.50505@zytor.com>
Date:	Mon, 30 Apr 2012 13:14:15 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michael Tokarev <mjt@....msk.ru>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ian Kent <raven@...maw.net>, Thomas Meyer <thomas@...3r.de>,
	autofs@...r.kernel.org
Subject: Re: autofs: make the autofsv5 packet file descriptor use a packetized
 pipe

> 
> The thing I *really* hate about the current autofs situation is how it
> really does everything you can possibly do wrong. Not at all the
> "let's just read as much as we can, and look at the return value to
> determine number of bytes/packets", but literally "I know a-priori how
> big the packet is, and I will read exactly that many bytes". That
> coupled with the psueod-fixed-size packets just made it a very very
> fragile thing.
> 

Yes, and that was my fault, originally... back when there was one packet
size and long before compat was a concern.

	-hpa

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