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Open Source and information security mailing list archives
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Date: Sun, 16 Nov 2014 22:58:41 -0800 From: Eric Dumazet <eric.dumazet@...il.com> To: Andi Kleen <andi@...stfloor.org> Cc: Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org, Thomas Lendacky <Thomas.Lendacky@....com>, Ariel Elior <ariel.elior@...gic.com>, Michael Chan <mchan@...adcom.com>, Prashant Sreedharan <prashant@...adcom.com>, Rasesh Mody <rasesh.mody@...gic.com>, Sathya Perla <sathya.perla@...lex.com>, Subbu Seetharaman <subbu.seetharaman@...lex.com>, Ajit Khaparde <ajit.khaparde@...lex.com>, Jesse Brandeburg <jesse.brandeburg@...el.com>, Jeff Kirsher <jeffrey.t.kirsher@...el.com>, Amir Vadai <amirv@...lanox.com>, Shradha Shah <sshah@...arflare.com>, Shreyas Bhatewara <sbhatewara@...are.com> Subject: Re: [PATCH net-next 01/14] net: provide a per host RSS key generic infrastructure On Sun, 2014-11-16 at 22:46 -0800, Andi Kleen wrote: > Wouldn't it be better to have some kernel facility to query on what > port a given mapping would end up rather than exporting > the key? Similar to querying the rounting table. > That would be more abstract. It is already there, few drivers implement ethtool -x eth0 And all users can read rss key : $ ethtool -x eth0 RX flow hash indirection table for eth0 with 8 RX ring(s): 0: 0 1 2 3 4 5 6 7 RSS hash key: d9:73:69:1e:c5:74:73:38:67:a4:a9:98:78:b1:e2:b6:39:1c:02:f9:30:57:79:84:02:b7:48:90:63:95:10:85:51:bb:f2:9e:f2:c5:85:27 > > > + { > > + .procname = "netdev_rss_key", > > + .data = &netdev_rss_key, > > + .maxlen = sizeof(int), > > + .mode = 0444, > > Surely 0400 ? After all it's a kind a "secret" Not really. Toeplitz is not cryptographic. A local program can easily rebuild the key even if kept 'secret' by networking stack. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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