kernel: mark source kernel for netfilter backports

This helps keeping track on patches & adding new kernels in the future.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 101 insertions, 0 deletions

diff --git a/target/linux/generic/backport-4.14/314-v4.16-netfilter-meta-secpath-support.patch b/target/linux/generic/backport-4.14/314-v4.16-netfilter-meta-secpath-support.patch
new file mode 100644
index 0000000000..d755c17fc3
--- /dev/null
+++ b/target/linux/generic/backport-4.14/314-v4.16-netfilter-meta-secpath-support.patch
@@ -0,0 +1,101 @@
+From: Florian Westphal <fw@strlen.de>
+Date: Wed, 6 Dec 2017 16:18:16 +0100
+Subject: [PATCH] netfilter: meta: secpath support
+
+replacement for iptables "-m policy --dir in --policy {ipsec,none}".
+
+Signed-off-by: Florian Westphal <fw@strlen.de>
+Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
+---
+
+--- a/include/uapi/linux/netfilter/nf_tables.h
++++ b/include/uapi/linux/netfilter/nf_tables.h
+@@ -777,6 +777,7 @@ enum nft_exthdr_attributes {
+  * @NFT_META_OIFGROUP: packet output interface group
+  * @NFT_META_CGROUP: socket control group (skb->sk->sk_classid)
+  * @NFT_META_PRANDOM: a 32bit pseudo-random number
++ * @NFT_META_SECPATH: boolean, secpath_exists (!!skb->sp)
+  */
+ enum nft_meta_keys {
+ 	NFT_META_LEN,
+@@ -804,6 +805,7 @@ enum nft_meta_keys {
+ 	NFT_META_OIFGROUP,
+ 	NFT_META_CGROUP,
+ 	NFT_META_PRANDOM,
++	NFT_META_SECPATH,
+ };
+ 
+ /**
+--- a/net/netfilter/nft_meta.c
++++ b/net/netfilter/nft_meta.c
+@@ -210,6 +210,11 @@ void nft_meta_get_eval(const struct nft_
+ 		*dest = prandom_u32_state(state);
+ 		break;
+ 	}
++#ifdef CONFIG_XFRM
++	case NFT_META_SECPATH:
++		nft_reg_store8(dest, !!skb->sp);
++		break;
++#endif
+ 	default:
+ 		WARN_ON(1);
+ 		goto err;
+@@ -308,6 +313,11 @@ int nft_meta_get_init(const struct nft_c
+ 		prandom_init_once(&nft_prandom_state);
+ 		len = sizeof(u32);
+ 		break;
++#ifdef CONFIG_XFRM
++	case NFT_META_SECPATH:
++		len = sizeof(u8);
++		break;
++#endif
+ 	default:
+ 		return -EOPNOTSUPP;
+ 	}
+@@ -318,6 +328,38 @@ int nft_meta_get_init(const struct nft_c
+ }
+ EXPORT_SYMBOL_GPL(nft_meta_get_init);
+ 
++static int nft_meta_get_validate(const struct nft_ctx *ctx,
++				 const struct nft_expr *expr,
++				 const struct nft_data **data)
++{
++#ifdef CONFIG_XFRM
++	const struct nft_meta *priv = nft_expr_priv(expr);
++	unsigned int hooks;
++
++	if (priv->key != NFT_META_SECPATH)
++		return 0;
++
++	switch (ctx->afi->family) {
++	case NFPROTO_NETDEV:
++		hooks = 1 << NF_NETDEV_INGRESS;
++		break;
++	case NFPROTO_IPV4:
++	case NFPROTO_IPV6:
++	case NFPROTO_INET:
++		hooks = (1 << NF_INET_PRE_ROUTING) |
++			(1 << NF_INET_LOCAL_IN) |
++			(1 << NF_INET_FORWARD);
++		break;
++	default:
++		return -EOPNOTSUPP;
++	}
++
++	return nft_chain_validate_hooks(ctx->chain, hooks);
++#else
++	return 0;
++#endif
++}
++
+ int nft_meta_set_validate(const struct nft_ctx *ctx,
+ 			  const struct nft_expr *expr,
+ 			  const struct nft_data **data)
+@@ -434,6 +476,7 @@ static const struct nft_expr_ops nft_met
+ 	.eval		= nft_meta_get_eval,
+ 	.init		= nft_meta_get_init,
+ 	.dump		= nft_meta_get_dump,
++	.validate	= nft_meta_get_validate,
+ };
+ 
+ static const struct nft_expr_ops nft_meta_set_ops = {