From: Avi Kivity <avi@qumranet.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: Davide Libenzi <davidel@xmailserver.org>,
Christoph Hellwig <hch@lst.de>,
linux-fsdevel@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
kvm-devel@lists.sourceforge.net,
Andrew Morton <akpm@linux-foundation.org>,
Al Viro <viro@ftp.linux.org.uk>
Subject: Re: [PATCH/RFC 1/2] anon-inodes: Remove fd_install() from anon_inode_getfd()
Date: Thu, 28 Feb 2008 09:52:25 +0200 [thread overview]
Message-ID: <47C66839.7080607@qumranet.com> (raw)
In-Reply-To: <adar6eyx8y5.fsf@cisco.com>
Roland Dreier wrote:
> > http://git.kernel.org/?p=linux/kernel/git/viro/vfs-2.6.git;a=commit;h=49be4f8114e6ff0efdab10ebba2493fb67bc3034
>
> Actually, looking closer at the kvm changes here, I think that
> create_vcpu_fd() needs the same treatment as kvm_dev_ioctl_create_vm()
> gets in the patch because of the race I mentioned in the changelog
> for my patch: otherwise kvm_vcpu_release() could drop the last
> reference to vcpu->kvm->filp before the get_file() gets an extra
> reference.
>
> I'm beginning to think that moving the fd_install() out of
> anon_inode_getfd() really is worth it to make a safer interface.
>
It makes is less usable, though (since the last step needs to be taken
by the caller.
We might add a int (*prepare_file)(...) parameter which
anon_inode_getfd() uses to munge the file before installing it.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2008-02-28 7:52 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-25 19:10 [PATCH] uverbs: kill last remaining modular get_empty_filp user Christoph Hellwig
2008-02-27 19:01 ` Roland Dreier
2008-02-27 19:16 ` [PATCH/RFC 1/2] anon-inodes: Remove fd_install() from anon_inode_getfd() Roland Dreier
2008-02-27 19:16 ` Roland Dreier
2008-02-27 19:18 ` [PATCH 2/2] IB/uverbs: Use anonymous inodes instead of private filesystem Roland Dreier
2008-02-27 19:20 ` [PATCH/RFC 1/2] anon-inodes: Remove fd_install() from anon_inode_getfd() Avi Kivity
2008-02-27 19:41 ` Davide Libenzi
2008-02-27 19:41 ` Davide Libenzi
2008-02-27 20:14 ` Roland Dreier
2008-02-27 20:30 ` Davide Libenzi
2008-02-27 21:05 ` Roland Dreier
2008-02-27 21:05 ` Roland Dreier
2008-02-27 23:42 ` Roland Dreier
2008-02-27 23:42 ` Roland Dreier
2008-02-28 7:52 ` Avi Kivity [this message]
2008-02-28 20:04 ` Davide Libenzi
2008-02-28 20:24 ` Roland Dreier
2008-02-28 20:52 ` Davide Libenzi
2008-03-05 9:32 ` [kvm-devel] " Avi Kivity
2008-03-05 9:32 ` Avi Kivity
2008-03-06 15:14 ` Christoph Hellwig
2008-03-06 15:14 ` Christoph Hellwig
2008-03-09 2:45 ` Roland Dreier
2008-03-09 2:45 ` Roland Dreier
2008-03-17 10:40 ` Christoph Hellwig
2008-03-17 10:40 ` Christoph Hellwig
2008-03-17 10:48 ` Avi Kivity
2008-03-09 2:46 ` Roland Dreier
2008-03-09 2:46 ` Roland Dreier
2008-03-06 15:14 ` Al Viro
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