linux-ext4 - Re: [PATCH v7 1/9] block: Keyslot Manager for Inline Encryption

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] [day] [month] [year] [list]

Message-ID: <20200305161139.GA19270@infradead.org>
Date:   Thu, 5 Mar 2020 08:11:39 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     Eric Biggers <ebiggers@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        linux-block@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org,
        Barani Muthukumaran <bmuthuku@....qualcomm.com>,
        Kuohong Wang <kuohong.wang@...iatek.com>,
        Kim Boojin <boojin.kim@...sung.com>
Subject: Re: [PATCH v7 1/9] block: Keyslot Manager for Inline Encryption

On Thu, Feb 27, 2020 at 01:25:12PM -0800, Satya Tangirala wrote:
> I think it does make some sense at least to make the keyslot type opaque
> to most of the system other than the driver itself (the driver will now
> have to call a function like blk_ksm_slot_idx_for_keyslot to actually get
> a keyslot number at the end of the day). Also this way, the keyslot manager
> can verify that the keyslot passed to blk_ksm_put_slot is actually part of
> that keyslot manager (and that somebody isn't releasing a slot number that
> was actually acquired from a different keyslot manager). I don't think
> it's much benefit or loss either way, but I already switched to passing
> pointers to struct keyslot around instead of ints, so I'll keep it that
> way unless you strongly feel that using ints in this case is better
> than struct keyslot *.

Exactly.  This provides a little type safety.