linux-kernel - Re: [RFC] killing boilerplate checks in ->link/->mkdir/->rename

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Message-ID: <20120203170825.GX23916@ZenIV.linux.org.uk>
Date:	Fri, 3 Feb 2012 17:08:25 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Artem Bityutskiy <dedekind1@...il.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC] killing boilerplate checks in ->link/->mkdir/->rename

On Fri, Feb 03, 2012 at 01:16:12AM +0000, Al Viro wrote:

> 	* ubifs, hfsplus, jffs2 - definitely broken if you create enough
> links.  i_nlink wraparound to zero, confused inode eviction logics.

BTW, ubifs plays funny games with i_nlink - decrements it early in
unlink/rmdir/rename and then increments it back on failure.  *If*
we really want it that way, we need to use set_nlink() there.  Frankly,
I'd rather deal with drop_nlink() after the last possible failure
exit...  Unless there are serious reasons why that wouldn't work, that is.
Artem?
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