From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
To: Jason Cooper <jason@lakedaemon.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
Keith Packard <keithp@keithp.com>,
linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] hwrng: core - Allow for multiple simultaneous active hwrng devices
Date: Tue, 9 Aug 2016 17:18:46 -0300 [thread overview]
Message-ID: <20160809201846.GA4684@khazad-dum.debian.net> (raw)
In-Reply-To: <20160809165710.GC2013@io.lakedaemon.net>
On Tue, 09 Aug 2016, Jason Cooper wrote:
> Perhaps a /dev/hwrng[0-9] per rng? That would lend itself nicely to a
> sysfs interface for per device quality, rate, and enabled attributes.
> e.g. /sys/class/hw_random/hwrng0/{device/,quality,rate,enabled}
IMHO, this is mightly annoying to use from inside a rngd-like utility in
a race-free, safe way. It looks to me that ioctl() would be a much
better interface for everything but the "enabled" functionality (which
should be reported to the rngd-like utility as open() on the real device
failing with, e.g., ENXIO, when that source is disabled).
--
Henrique Holschuh
next prev parent reply other threads:[~2016-08-09 20:18 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-25 20:07 [PATCH] hwrng: core - Allow for multiple simultaneous active hwrng devices Keith Packard
2016-08-09 9:50 ` Herbert Xu
2016-08-09 16:57 ` Jason Cooper
2016-08-09 17:58 ` Keith Packard
2016-08-09 18:26 ` Jason Cooper
2016-08-09 19:01 ` Keith Packard
2016-08-09 20:18 ` Henrique de Moraes Holschuh [this message]
2016-08-09 23:26 ` Keith Packard
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