linux-kernel - Re: Recursive directory accounting for size, ctime, etc.

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]

Message-ID: <20080715224535.GB28739@fieldses.org>
Date:	Tue, 15 Jul 2008 18:45:35 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Sage Weil <sage@...dream.net>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	ceph-devel@...ts.sf.net
Subject: Re: Recursive directory accounting for size, ctime, etc.

On Tue, Jul 15, 2008 at 02:16:45PM -0700, Sage Weil wrote:
> On Tue, 15 Jul 2008, J. Bruce Fields wrote:
> > I just wonder how one would explain to users (or application writers)
> > why changes to a file are reflected in the parent's rctime in one case,
> > and not in another, especially if the primary link is otherwise
> > indistinguishable from the others.  The symptoms could be a bit
> > mysterious from their point of view.
> 
> Yes.  I'm not sure it can really be avoided, though.  I'm trying to lift 
> the usual restriction of having to predefine what the 
> volume/subvolume/qtree boundary is and then disallowing links/renames 
> between then.  When all of a file's links are contained within the 
> directory you're looking at (i.e. something that might be a subvolume 
> under that paradigm), things look sensible.  If links span two directories 
> and you're looking at recursive stats for a dir containing only one of 
> them, then you're necessarily going to have some weirdness (you don't want 
> to double-count).

Yeah, there's no clear right answer--that's partly why I was curious
about rctime specifically.

--b.
--
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/