linux-kernel - Re: [PATCH v11 net-next 00/12] eBPF syscall, verifier, testsuite

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Message-ID: <CAMEtUuyk7Kf3Eckqk1Z0JBQoNPTf87+Lm5KKV1ybOTxp-9B_Eg@mail.gmail.com>
Date:	Wed, 10 Sep 2014 10:28:25 -0700
From:	Alexei Starovoitov <ast@...mgrid.com>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Ingo Molnar <mingo@...nel.org>,
	Linus Torvalds <torvalds@...uxfoundation.org>,
	Andy Lutomirski <luto@...capital.net>,
	Steven Rostedt <rostedt@...dmis.org>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	Chema Gonzalez <chema@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Pablo Neira Ayuso <pablo@...filter.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...uxfoundation.org>,
	Kees Cook <keescook@...omium.org>,
	Linux API <linux-api@...r.kernel.org>,
	Network Development <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 net-next 00/12] eBPF syscall, verifier, testsuite

On Wed, Sep 10, 2014 at 1:19 AM, Daniel Borkmann <dborkman@...hat.com> wrote:
>>
>>         In the future maps can have different types: hash, array, bloom
>> filter,
>>         radix-tree, but currently only hash type is supported:
>>         enum bpf_map_type {
>>            BPF_MAP_TYPE_UNSPEC,
>>            BPF_MAP_TYPE_HASH,
>>         };
>
>
> If we mention them here in the man page, users are going to request
> them, naturally. ;) So I'd just mention what we have, not what we do
> not yet have. But I'm wondering how much library boiler plate only
> for BPF we want to add in future, hopefully not most of what's in
> Corman ... ? ;)

:)
as cover letter says hash type was moved from this set to
later series, so it's implemented.
array and radix-tree are implemented as well, but not ready for
review yet. I have strong use cases for them.
Even two of the simplest examples for tracing (ex2 and ex3)
will benefit from 'array' type.
For bloomfiler type Chema had a strong use case as well.
I was assuming he will implement it sooner or later ;)
But, surely, I can drop future features from the manpage.
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