netdev - Re: RFC: rtnetlink problems with Cisco enic and VFs

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] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 22 Apr 2014 19:03:19 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	David Gibson <dgibson@...hat.com>
Cc:	netdev@...r.kernel.org, Christian Benvenuti <benve@...co.com>,
	Sujith Sankar <ssujith@...co.com>,
	Govindarajulu Varadarajan <govindarajulu90@...il.com>,
	Neel Patel <neepatel@...co.com>,
	Nishank Trivedi <nistrive@...co.com>
Subject: Re: RFC: rtnetlink problems with Cisco enic and VFs

On Tue, 2014-04-22 at 14:14 +1000, David Gibson wrote:
> I believe I've found a problem with netlink handling which can be
> triggered on Cisco enic devices with a large number (30-40) of virtual
> functions.  I believe this is the cause of a real customer problem
> we've seen.
> 
>  * When requesting a list of interfaces with RTM_GETLINK, enic devices
>    (and currently, _only_ enic devices) report IFLA_VF_PORTS
>    information 
> 
>  * IFLA_VF_PORTS information has at least 90 bytes ber virtual function
> 
>  * Unlike IFLA_VFINFO_LIST, the ports information is always reported,
>    regardless of the setting of the IFLA_EXT_MASK parameter
[...]

So I think you should make reporting of IFLA_VF_PORTS dependent on the
same flag as IFLA_VFINFO_LIST.

Ben.

-- 
Ben Hutchings
Beware of programmers who carry screwdrivers. - Leonard Brandwein

Download attachment "signature.asc" of type "application/pgp-signature" (812 bytes)