linux-kernel - Re: [PATCH net-next 3/4] bpf: add support for persistent maps/progs

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Message-ID: <5621B5BC.8020204@plumgrid.com>
Date:	Fri, 16 Oct 2015 19:43:08 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Daniel Borkmann <daniel@...earbox.net>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	davem@...emloft.net, viro@...IV.linux.org.uk, tgraf@...g.ch,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alexei Starovoitov <ast@...nel.org>
Subject: Re: [PATCH net-next 3/4] bpf: add support for persistent maps/progs

On 10/16/15 4:44 PM, Eric W. Biederman wrote:
> Alexei Starovoitov <ast@...mgrid.com> writes:
>
>> We can argue about api for 2nd, whether it's mount with fd=1234 string
>> or else, but for the first mount style doesn't make sense.
>
> Why does mount not make sense?  It is exactly what you are looking for
> so why does it not make sense?

hmm, how do you get a new fd back after mounting it?
Note, open cannot be overloaded, so we end up with BPF_NEW_FD anyway,
but now it's more convoluted and empty mounts are everywhere.

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