netdev - Re: [PATCH v4 net-next 0/5] net: filter: split sk_filter into socket and bpf, cleanup names

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Message-Id: <20140802.150956.747835720193799195.davem@davemloft.net>
Date:	Sat, 02 Aug 2014 15:09:56 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ast@...mgrid.com
Cc:	dborkman@...hat.com, willemb@...gle.com, pablo@...filter.org,
	keescook@...omium.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH v4 net-next 0/5] net: filter: split sk_filter into
 socket and bpf, cleanup names

From: Alexei Starovoitov <ast@...mgrid.com>
Date: Wed, 30 Jul 2014 20:34:11 -0700

> The main goal of the series is to split 'struct sk_filter' into socket and
> bpf parts and cleanup names in the following way:
> - everything that deals with sockets keeps 'sk_*' prefix
> - everything that is pure BPF is changed to 'bpf_*' prefix
> 
> split 'struct sk_filter' into
> struct sk_filter {
> 	atomic_t        refcnt;
> 	struct rcu_head rcu;
> 	struct bpf_prog *prog;
> };
> and
> struct bpf_prog {
>         u32                     jited:1,
>                                 len:31;
>         struct sock_fprog_kern  *orig_prog;
>         unsigned int            (*bpf_func)(const struct sk_buff *skb,
>                                             const struct bpf_insn *filter);
>         union {
>                 struct sock_filter      insns[0];
>                 struct bpf_insn         insnsi[0];
>                 struct work_struct      work;
>         };
> };
> so that 'struct bpf_prog' can be used independent of sockets and cleans up
> 'unattached' bpf use cases:
> isdn, ppp, team, seccomp, ptp, xt_bpf, cls_bpf, test_bpf
> which don't need refcnt/rcu fields.
> 
> It's a follow up to the rcu cleanup started by Pablo in
> commit 34c5bd66e5 ("net: filter: don't release unattached filter through call_rcu()")
> 
> Patch 1 - cleans up socket memory charging and makes it possible for functions
>   sk(bpf)_migrate_filter(), sk(bpf)_prepare_filter() to be socket independent
> Patches 2-4 - trivial renames
> Patch 5 - sk_filter split and renames of related sk_*() functions

Series applied, thanks Alexei.
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