From: Christoph Hellwig <hch@infradead.org>
To: Jan Kara <jack@suse.cz>
Cc: cluster-devel@redhat.com, xfs@oss.sgi.com,
Mark Fasheh <mfasheh@suse.com>,
reiserfs-devel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
Christoph Hellwig <hch@infradead.org>,
linux-mtd@lists.infradead.org, viro@zeniv.linux.org.uk,
jfs-discussion@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-nfs@vger.kernel.org, linux-btrfs@vger.kernel.org,
Joel Becker <jlbec@evilplan.org>
Subject: Re: [PATCH 12/18] ocfs2: use generic posix ACL infrastructure
Date: Tue, 3 Dec 2013 02:48:54 -0800 [thread overview]
Message-ID: <20131203104854.GA3223@infradead.org> (raw)
In-Reply-To: <20131202230007.GK12253@quack.suse.cz>
On Tue, Dec 03, 2013 at 12:00:07AM +0100, Jan Kara wrote:
> Hum, this changes the cluster locking. Previously ocfs2_acl_get() used
> from ocfs2_acl_chmod() grabbed cluster wide inode lock. Now getting of ACL
> isn't protected by the inode lock. That being said the cluster locking
> around setattr looks fishy anyway - if two processes on different
> nodes are changing attributes of the same file, changing ACLs post fact
> after dropping inode lock could cause interesting effects. Also I'm
> wondering how inode_change_ok() can ever be safe without holding inode
> lock... Until we grab that other node is free to change e.g. owner of the
> inode thus leading even to security implications. But maybe I'm missing
> something. Mark, Joel?
Hmm, indeed. How does ocfs2_iop_get_acl get away without that lock?
Btw, ocfs2 changes will need careful testing as I couldn't find any easy
way to run xfstests on ocfs2 out of the box.
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next prev parent reply other threads:[~2013-12-03 10:48 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-01 11:59 [PATCH 00/18] Consolidate Posix ACL implementation Christoph Hellwig
2013-12-01 11:59 ` [PATCH 01/18] reiserfs: prefix ACL symbols with reiserfs_ Christoph Hellwig
2013-12-02 20:15 ` Jan Kara
2013-12-01 11:59 ` [PATCH 02/18] fs: add get_acl helper Christoph Hellwig
2013-12-02 20:14 ` Jan Kara
2013-12-01 11:59 ` [PATCH 03/18] fs: add a set_acl inode operation Christoph Hellwig
2013-12-02 20:57 ` Jan Kara
2013-12-01 11:59 ` [PATCH 04/18] fs: add generic xattr_acl handlers Christoph Hellwig
2013-12-02 20:59 ` Jan Kara
2013-12-01 11:59 ` [PATCH 05/18] fs: make posix_acl_chmod more useful Christoph Hellwig
2013-12-02 21:09 ` Jan Kara
2013-12-01 11:59 ` [PATCH 06/18] fs: make posix_acl_create " Christoph Hellwig
2013-12-02 21:11 ` Jan Kara
2013-12-01 11:59 ` [PATCH 07/18] btrfs: use generic posix ACL infrastructure Christoph Hellwig
2013-12-01 11:59 ` [PATCH 08/18] ext2/3/4: " Christoph Hellwig
2013-12-02 22:13 ` Jan Kara
2013-12-02 22:18 ` [Jfs-discussion] " gary sheppard
2013-12-01 11:59 ` [PATCH 09/18] f2fs: " Christoph Hellwig
2013-12-06 1:37 ` Jaegeuk Kim
2013-12-08 9:14 ` Christoph Hellwig
2013-12-08 23:28 ` Jaegeuk Kim
2013-12-01 11:59 ` [PATCH 10/18] hfsplus: " Christoph Hellwig
2013-12-01 14:36 ` Vyacheslav Dubeyko
2013-12-01 11:59 ` [PATCH 11/18] jffs2: " Christoph Hellwig
2013-12-01 11:59 ` [PATCH 12/18] ocfs2: " Christoph Hellwig
2013-12-02 23:00 ` Jan Kara
2013-12-03 10:48 ` Christoph Hellwig [this message]
2013-12-01 11:59 ` [PATCH 13/18] reiserfs: " Christoph Hellwig
2013-12-02 22:17 ` Jan Kara
2013-12-01 11:59 ` [PATCH 14/18] xfs: " Christoph Hellwig
2013-12-02 23:34 ` Dave Chinner
2013-12-01 11:59 ` [PATCH 15/18] jfs: " Christoph Hellwig
2013-12-02 22:11 ` [Jfs-discussion] " Dave Kleikamp
2013-12-01 11:59 ` [PATCH 16/18] gfs2: " Christoph Hellwig
2013-12-04 12:12 ` [Cluster-devel] " Steven Whitehouse
2013-12-06 19:47 ` Christoph Hellwig
2013-12-01 11:59 ` [PATCH 17/18] nfs: use generic posix ACL infrastructure for v3 Posix ACLs Christoph Hellwig
2013-12-01 11:59 ` [PATCH 18/18] fs: remove generic_acl Christoph Hellwig
2013-12-05 17:57 ` [PATCH 00/18] Consolidate Posix ACL implementation Andreas Gruenbacher
2013-12-06 19:46 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2013-12-11 10:42 [PATCH 00/18] Consolidate Posix ACL implementation V2 Christoph Hellwig
2013-12-11 10:42 ` [PATCH 12/18] ocfs2: use generic posix ACL infrastructure Christoph Hellwig
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