linux-kernel - [RFC] a couple of i

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Date:	Fri, 4 Mar 2011 17:13:53 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	chris.mason@...cle.com
Cc:	linux-kernel@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: [RFC] a couple of i_nlink fixes in btrfs

	a) rename() plays with i_nlink of old_inode; bad, since it's not
locked.  I'd add a variant of btrfs_unlink_inode() that would leave
btrfs_drop_nlink()/btrfs_update_inode() to callers and use it instead.
	b) btrfs_link() doesn't check for i_nlink overflows.  I don't
know if there's anything preventing that many links to a file on btrfs,
but if there is, it's at least worth a comment in there...

	Please, review; patches in followups or in #btrfs in vfs-2.6.git
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