From: "Theodore Y. Ts'o" <tytso@mit.edu>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: Rich Felker <dalias@libc.org>,
linux-fsdevel@vger.kernel.org, musl@lists.openwall.com,
linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org,
linux-cifs@vger.kernel.org
Subject: Re: getdents64 lost direntries with SMB/NFS and buffer size < unknown threshold
Date: Wed, 25 Dec 2019 22:56:06 -0500 [thread overview]
Message-ID: <20191226035606.GB10794@mit.edu> (raw)
In-Reply-To: <87a77g2o2o.fsf@mid.deneb.enyo.de>
On Wed, Dec 25, 2019 at 08:38:07PM +0100, Florian Weimer wrote:
> 32 bits are simply not enough storage space for the cookie. Hashing
> just masks the presence of these bugs, but does not eliminate them
> completely.
Arguably 64 bits is not enough space for the cookie. I'd be a lot
happier if it was 128 or 256 bits. This is just one of those places
where POSIX is Really Broken(tm). Unfortunately, NFS only gives us 64
bits for the readdir/readdirplus cookie, so we're kind of stuck with
it.
- Ted
prev parent reply other threads:[~2019-12-26 3:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-20 0:15 Rich Felker
2019-11-20 19:57 ` [musl] " Florian Weimer
2019-11-20 20:59 ` Rich Felker
2019-11-21 17:54 ` Theodore Y. Ts'o
2019-12-25 19:38 ` Florian Weimer
2019-12-26 3:56 ` Theodore Y. Ts'o [this message]
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