linux-kernel - Re: [PATCH/RFC 1/2] anon-inodes: Remove fd_install() from anon_inode

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Message-ID: <Pine.LNX.4.64.0802271138170.377@alien.or.mcafeemobile.com>
Date:	Wed, 27 Feb 2008 11:41:24 -0800 (PST)
From:	Davide Libenzi <davidel@...ilserver.org>
To:	Roland Dreier <rdreier@...co.com>
cc:	Christoph Hellwig <hch@....de>, linux-fsdevel@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Davide Libenzi <davidel@...ilserver.org>,
	Avi Kivity <avi@...ranet.com>, kvm-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@....linux.org.uk>
Subject: Re: [PATCH/RFC 1/2] anon-inodes: Remove fd_install() from
 anon_inode_getfd()

[CC-ing Al too]


On Wed, 27 Feb 2008, Roland Dreier wrote:

> The anonymous inodes interface anon_inode_getfd() calls fd_install()
> for the newly created fd, which does not work for some use cases where
> the caller must do futher initialization before exposing the file to
> userspace.  This is also probably not the safest interface, since the
> caller must be sure that it is OK if userspace closes the fd before
> anon_inode_getfd() even returns.

I believe Al changed the interface to not give out inode* and file*, *and* 
call fd_install() inside it. I'd slightly prefer Al version, although I 
don't see any major problems in this one too.



- Davide


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