Re: [patch 06/14] hfsplus: remove hfsplus_permission()

From: Roman Zippel
Date: Fri May 23 2008 - 17:54:19 EST


On Fri, 23 May 2008, Miklos Szeredi wrote:

> Semi-concrete: link(2) locks the target's parent and the source.
> Cross-directory rename(2) locks both parents. If link's target is a
> file which has children, this can result in an ABBA deadlock. That's
> _before_ the filesystem's ->link() or ->rename() function is called.

I'm afraid you have to be more concrete than this.
hfsplus_file_inode_operations doesn't have a link or rename operation, so
if one your source parents above involves a file, it shouldn't get this
far or you have to describe your scenario in more detail.

bye, Roman
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