[ofa-general] Allowing end-users to query for fabric information
Mike Heinz
michael.heinz at qlogic.com
Mon Sep 22 12:18:56 PDT 2008
Thanks for the explanation.
--
Michael Heinz
Principal Engineer, Qlogic Corporation
King of Prussia, Pennsylvania
-----Original Message-----
From: Roland Dreier [mailto:rdreier at cisco.com]
Sent: Monday, September 22, 2008 3:18 PM
To: Mike Heinz
Cc: general at lists.openfabrics.org
Subject: Re: [ofa-general] Allowing end-users to query for fabric
information
> What was the reason for making this design choice? While I could >
certainly provide boot scripts to change the permissions to >
/dev/infiniband/umad*, I'd rather understand why the decision was made
> to restrict access.
because /dev/infiniband/umadX allows full unfiltered access to
send/receive any MADs. Including changing routing tables, bringing
ports down, etc. Not stuff that unprivileged users should be able to
do.
It would make sense to have a higher-level interface that only allows
safe queries without side effects, but that's quite a bit more work than
just changing permissions on device nodes.
- R.
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