From: Ken Goldman <kgoldman-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
To: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: TPM 2.0 device driver blocking open
Date: Fri, 30 Dec 2016 10:53:26 -0500 [thread overview]
Message-ID: <o45vtc$ur$1@blaine.gmane.org> (raw)
It appears that an open() to the TPM doesn't block if another process
has /dev/tpm0 open. It returns -1, an error.
Questions:
Is this expected behavior?
Was this also true for 1.2?
Is there any way to change it. I didn't set O_NOBLOCK. Is there
perhaps an ioctl()?
Is this something that should be added?
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next reply other threads:[~2016-12-30 15:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-30 15:53 Ken Goldman [this message]
2016-12-30 16:22 ` TPM 2.0 device driver blocking open James Bottomley
[not found] ` <1483114928.2442.28.camel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2016-12-30 18:46 ` James Bottomley
[not found] ` <1483123609.2712.1.camel-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>
2017-01-03 21:26 ` Jason Gunthorpe
2017-01-02 15:15 ` Fuchs, Andreas
[not found] ` <9F48E1A823B03B4790B7E6E69430724DC7C1378B-pTbww/UJF9iZbMGAS439G2SU2VBt9E6NG9Ur7JDdleE@public.gmane.org>
2017-01-02 16:25 ` James Bottomley
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