kernel: Copy patches from kernel 4.14 to 4.19

This just copies the files from the kernel 4.14 specific folders into
the kernel 4.19 specific folder, no changes are done to the files in
this commit.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 145 insertions, 0 deletions

diff --git a/target/linux/generic/backport-4.19/351-v4.18-netfilter-nf_flow_table-cache-mtu-in-struct-flow_off.patch b/target/linux/generic/backport-4.19/351-v4.18-netfilter-nf_flow_table-cache-mtu-in-struct-flow_off.patch
new file mode 100644
index 0000000000..e2015e72ac
--- /dev/null
+++ b/target/linux/generic/backport-4.19/351-v4.18-netfilter-nf_flow_table-cache-mtu-in-struct-flow_off.patch
@@ -0,0 +1,145 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Fri, 16 Feb 2018 10:57:23 +0100
+Subject: [PATCH] netfilter: nf_flow_table: cache mtu in struct
+ flow_offload_tuple
+
+Reduces the number of cache lines touched in the offload forwarding path
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/include/net/netfilter/nf_flow_table.h
++++ b/include/net/netfilter/nf_flow_table.h
+@@ -55,6 +55,8 @@ struct flow_offload_tuple {
+ 
+ 	int				oifidx;
+ 
++	u16				mtu;
++
+ 	struct dst_entry		*dst_cache;
+ };
+ 
+--- a/net/ipv4/netfilter/nf_flow_table_ipv4.c
++++ b/net/ipv4/netfilter/nf_flow_table_ipv4.c
+@@ -177,7 +177,7 @@ static int nf_flow_tuple_ip(struct sk_bu
+ }
+ 
+ /* Based on ip_exceeds_mtu(). */
+-static bool __nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
++static bool nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
+ {
+ 	if (skb->len <= mtu)
+ 		return false;
+@@ -191,17 +191,6 @@ static bool __nf_flow_exceeds_mtu(const
+ 	return true;
+ }
+ 
+-static bool nf_flow_exceeds_mtu(struct sk_buff *skb, const struct rtable *rt)
+-{
+-	u32 mtu;
+-
+-	mtu = ip_dst_mtu_maybe_forward(&rt->dst, true);
+-	if (__nf_flow_exceeds_mtu(skb, mtu))
+-		return true;
+-
+-	return false;
+-}
+-
+ unsigned int
+ nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
+ 			const struct nf_hook_state *state)
+@@ -232,9 +221,9 @@ nf_flow_offload_ip_hook(void *priv, stru
+ 
+ 	dir = tuplehash->tuple.dir;
+ 	flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
+-
+ 	rt = (const struct rtable *)flow->tuplehash[dir].tuple.dst_cache;
+-	if (unlikely(nf_flow_exceeds_mtu(skb, rt)))
++
++	if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)))
+ 		return NF_ACCEPT;
+ 
+ 	if (skb_try_make_writable(skb, sizeof(*iph)))
+--- a/net/ipv6/netfilter/nf_flow_table_ipv6.c
++++ b/net/ipv6/netfilter/nf_flow_table_ipv6.c
+@@ -173,7 +173,7 @@ static int nf_flow_tuple_ipv6(struct sk_
+ }
+ 
+ /* Based on ip_exceeds_mtu(). */
+-static bool __nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
++static bool nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
+ {
+ 	if (skb->len <= mtu)
+ 		return false;
+@@ -184,17 +184,6 @@ static bool __nf_flow_exceeds_mtu(const
+ 	return true;
+ }
+ 
+-static bool nf_flow_exceeds_mtu(struct sk_buff *skb, const struct rt6_info *rt)
+-{
+-	u32 mtu;
+-
+-	mtu = ip6_dst_mtu_forward(&rt->dst);
+-	if (__nf_flow_exceeds_mtu(skb, mtu))
+-		return true;
+-
+-	return false;
+-}
+-
+ unsigned int
+ nf_flow_offload_ipv6_hook(void *priv, struct sk_buff *skb,
+ 			  const struct nf_hook_state *state)
+@@ -225,9 +214,9 @@ nf_flow_offload_ipv6_hook(void *priv, st
+ 
+ 	dir = tuplehash->tuple.dir;
+ 	flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
+-
+ 	rt = (struct rt6_info *)flow->tuplehash[dir].tuple.dst_cache;
+-	if (unlikely(nf_flow_exceeds_mtu(skb, rt)))
++
++	if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)))
+ 		return NF_ACCEPT;
+ 
+ 	if (skb_try_make_writable(skb, sizeof(*ip6h)))
+--- a/net/netfilter/nf_flow_table.c
++++ b/net/netfilter/nf_flow_table.c
+@@ -4,6 +4,8 @@
+ #include <linux/netfilter.h>
+ #include <linux/rhashtable.h>
+ #include <linux/netdevice.h>
++#include <net/ip.h>
++#include <net/ip6_route.h>
+ #include <net/netfilter/nf_tables.h>
+ #include <net/netfilter/nf_flow_table.h>
+ #include <net/netfilter/nf_conntrack.h>
+@@ -23,6 +25,7 @@ flow_offload_fill_dir(struct flow_offloa
+ {
+ 	struct flow_offload_tuple *ft = &flow->tuplehash[dir].tuple;
+ 	struct nf_conntrack_tuple *ctt = &ct->tuplehash[dir].tuple;
++	struct dst_entry *dst = route->tuple[dir].dst;
+ 
+ 	ft->dir = dir;
+ 
+@@ -30,10 +33,12 @@ flow_offload_fill_dir(struct flow_offloa
+ 	case NFPROTO_IPV4:
+ 		ft->src_v4 = ctt->src.u3.in;
+ 		ft->dst_v4 = ctt->dst.u3.in;
++		ft->mtu = ip_dst_mtu_maybe_forward(dst, true);
+ 		break;
+ 	case NFPROTO_IPV6:
+ 		ft->src_v6 = ctt->src.u3.in6;
+ 		ft->dst_v6 = ctt->dst.u3.in6;
++		ft->mtu = ip6_dst_mtu_forward(dst);
+ 		break;
+ 	}
+ 
+@@ -44,8 +49,7 @@ flow_offload_fill_dir(struct flow_offloa
+ 
+ 	ft->iifidx = route->tuple[dir].ifindex;
+ 	ft->oifidx = route->tuple[!dir].ifindex;
+-
+-	ft->dst_cache = route->tuple[dir].dst;
++	ft->dst_cache = dst;
+ }
+ 
+ struct flow_offload *