Re: [PATCH net-next 2/2] net:add socket option for low latencypolling

From: Ben Hutchings
Date: Tue Jun 11 2013 - 16:25:18 EST

On Tue, 2013-06-11 at 17:24 +0300, Eliezer Tamir wrote:
> adds a socket option for low latency polling.
> This allows overriding the global sysctl value with a per-socket one.
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -913,6 +913,23 @@ set_rcvbuf:
> sock_valbool_flag(sk, SOCK_SELECT_ERR_QUEUE, valbool);
> break;
> + case SO_LL:
> + if (!capable(CAP_NET_ADMIN))
> + ret = -EACCES;

Failed capability checks normally result in EPERM whereas EACCES usually
results from a file permission/ACL/label check.

Perhaps unprivileged users should be allowed to set a value as long as
it's less than or equal to the global value?


Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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