netdev - [PATCH 1/2 v2 net-next] netfilter: xt_bpf: add mising opaque struct sk

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Date:	Tue, 29 Jul 2014 18:12:15 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	netfilter-devel@...r.kernel.org
Cc:	davem@...emloft.net, netdev@...r.kernel.org, ast@...mgrid.com,
	keescook@...omium.org, willemb@...gle.com, dborkman@...hat.com
Subject: [PATCH 1/2 v2 net-next] netfilter: xt_bpf: add mising opaque struct sk_filter definition

This structure is not exposed to userspace, so fix this by defining
struct sk_filter; so we skip the casting in kernelspace. This is safe
since userspace has no way to lurk with that internal pointer.

Fixes: e6f30c7 ("netfilter: x_tables: add xt_bpf match")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
---
v2: address Willem's feedback, we still need uapi/linux/filter.h for
    userspace iptables builds.

 include/uapi/linux/netfilter/xt_bpf.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/netfilter/xt_bpf.h b/include/uapi/linux/netfilter/xt_bpf.h
index 5dda450..2ec9fbc 100644
--- a/include/uapi/linux/netfilter/xt_bpf.h
+++ b/include/uapi/linux/netfilter/xt_bpf.h
@@ -6,6 +6,8 @@
 
 #define XT_BPF_MAX_NUM_INSTR	64
 
+struct sk_filter;
+
 struct xt_bpf_info {
 	__u16 bpf_program_num_elem;
 	struct sock_filter bpf_program[XT_BPF_MAX_NUM_INSTR];
-- 
1.7.10.4

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