linux-kernel - Re: [PATCH 1/3][BUGFIX] configfs: Introduce configfs_dirent

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:	Fri, 13 Jun 2008 13:19:46 -0700
From:	Joel Becker <Joel.Becker@...cle.com>
To:	Louis Rilling <Louis.Rilling@...labs.com>
Cc:	linux-kernel@...r.kernel.org, ocfs2-devel@....oracle.com
Subject: Re: [PATCH 1/3][BUGFIX] configfs: Introduce configfs_dirent_lock

On Fri, Jun 13, 2008 at 02:09:23PM +0200, Louis Rilling wrote:
> Oh, should probably provide some d_revalidate() also, which would return
> -ENOENT for a dentry under a directory flagged with USET_DROPPING. But I'm
> realizing that such "inconsistencies" (some default groups being valid in the
> d_cache and some other ones not) already happen between the time detach_prep()
> has flagged a default group with USET_DROPPING and the default
> group is actually detached. Am I wrong?

	We don't need d_revalidate().  As I stated at the end of my last
email, USET_DROPPING does not mean 'It already went away'.  It just
means we're safe to do so, because we prevent new children.  We actually
make it go away underneath i_mutex.
	The VFS handles inconsistencies between lookup and action.  It's
part of normal operation.  Otherwise, they'd have to hold all the
i_mutexes around lookup and action.

Joel

-- 

"When choosing between two evils, I always like to try the one
 I've never tried before."
        - Mae West

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@...cle.com
Phone: (650) 506-8127
--
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/