linux-kernel - Re: [RFC 12/26] ext2 white-out support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 2 Aug 2007 07:24:39 +0200
From:	"Ph. Marek" <philipp.marek@...v.gv.at>
To:	Josef Sipek <jsipek@....cs.sunysb.edu>
Cc:	Dave Kleikamp <shaggy@...ux.vnet.ibm.com>,
	Jan Blunck <jblunck@...e.de>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Bharata B Rao <bharata@...ux.vnet.ibm.com>, hch@...radead.org
Subject: Re: [RFC 12/26] ext2 white-out support

On Mittwoch, 1. August 2007, Josef Sipek wrote:
> Alright not the greatest of examples, there is something to be said about
> symmetry, so...let me try again :)
...
> Oops! There's a whiteout in /b that hides the directory in /c -- rename(2)
> shouldn't make directory subtrees disappear.
>
> There are two ways to solve this:
>
> 1) "cp -r" the entire subtree ...
>
> 2) Don't store whiteouts within branches ...
Sorry for making uninformed guesses, but if there are already special nodes 
(whiteout), why not extending them to some more general format - specifying a 
(source, destination) pair at the topmost level?
- A delete is a (source, NULL) pair
- A rename is a (source, destination) pair, which causes lookups on source to
  use the string destination in the lower branches.


Would that work?


Regards,

Phil

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/