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kernel: port 4.19 xt_FLOWOFFLOAD changes to 4.14

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
2019-09-25 16:45:05 +02:00
parent a438eac9ac
commit 442ecce761
3 changed files with 117 additions and 20 deletions
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86
target/linux/generic/backport-4.14/372-netfilter-nft_flow_offload-fix-interaction-with-vrf-.patch Normal file
View File

@@ -0,0 +1,86 @@
From: wenxu <wenxu@ucloud.cn>
Date: Thu, 10 Jan 2019 14:51:35 +0800
Subject: [PATCH] netfilter: nft_flow_offload: fix interaction with vrf slave
device
In the forward chain, the iif is changed from slave device to master vrf
device. Thus, flow offload does not find a match on the lower slave
device.
This patch uses the cached route, ie. dst->dev, to update the iif and
oif fields in the flow entry.
After this patch, the following example works fine:
# ip addr add dev eth0 1.1.1.1/24
# ip addr add dev eth1 10.0.0.1/24
# ip link add user1 type vrf table 1
# ip l set user1 up
# ip l set dev eth0 master user1
# ip l set dev eth1 master user1
# nft add table firewall
# nft add flowtable f fb1 { hook ingress priority 0 \; devices = { eth0, eth1 } \; }
# nft add chain f ftb-all {type filter hook forward priority 0 \; policy accept \; }
# nft add rule f ftb-all ct zone 1 ip protocol tcp flow offload @fb1
# nft add rule f ftb-all ct zone 1 ip protocol udp flow offload @fb1
Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -84,7 +84,6 @@ struct flow_offload {
struct nf_flow_route {
struct {
struct dst_entry *dst;
- int ifindex;
} tuple[FLOW_OFFLOAD_DIR_MAX];
};
--- a/net/netfilter/nf_flow_table_core.c
+++ b/net/netfilter/nf_flow_table_core.c
@@ -28,6 +28,7 @@ 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 *other_dst = route->tuple[!dir].dst;
struct dst_entry *dst = route->tuple[dir].dst;
ft->dir = dir;
@@ -50,8 +51,8 @@ flow_offload_fill_dir(struct flow_offloa
ft->src_port = ctt->src.u.tcp.port;
ft->dst_port = ctt->dst.u.tcp.port;
- ft->iifidx = route->tuple[dir].ifindex;
- ft->oifidx = route->tuple[!dir].ifindex;
+ ft->iifidx = other_dst->dev->ifindex;
+ ft->oifidx = dst->dev->ifindex;
ft->dst_cache = dst;
}
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -28,9 +28,11 @@ nft_flow_dst(const struct nf_conn *ct, e
switch (nft_pf(pkt)) {
case NFPROTO_IPV4:
fl.u.ip4.daddr = ct->tuplehash[dir].tuple.src.u3.ip;
+ fl.u.ip4.flowi4_oif = nft_in(pkt)->ifindex;
break;
case NFPROTO_IPV6:
fl.u.ip6.daddr = ct->tuplehash[dir].tuple.src.u3.in6;
+ fl.u.ip6.flowi6_oif = nft_in(pkt)->ifindex;
break;
}
@@ -52,9 +54,7 @@ static int nft_flow_route(const struct n
return -ENOENT;
route->tuple[dir].dst = this_dst;
- route->tuple[dir].ifindex = nft_in(pkt)->ifindex;
route->tuple[!dir].dst = other_dst;
- route->tuple[!dir].ifindex = nft_out(pkt)->ifindex;
return 0;
}

4
target/linux/generic/hack-4.14/647-netfilter-flow-acct.patch
View File

@@ -1,6 +1,6 @@
--- a/include/net/netfilter/nf_flow_table.h
+++ b/include/net/netfilter/nf_flow_table.h
@@ -164,6 +164,8 @@ struct nf_flow_table_hw {
@@ -163,6 +163,8 @@ struct nf_flow_table_hw {
int nf_flow_table_hw_register(const struct nf_flow_table_hw *offload);
void nf_flow_table_hw_unregister(const struct nf_flow_table_hw *offload);
@@ -19,7 +19,7 @@
struct flow_offload_entry {
struct flow_offload flow;
@@ -151,6 +152,22 @@ void flow_offload_free(struct flow_offlo
@@ -152,6 +153,22 @@ void flow_offload_free(struct flow_offlo
}
EXPORT_SYMBOL_GPL(flow_offload_free);

47
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
View File

@@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
--- /dev/null
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -0,0 +1,408 @@
@@ -0,0 +1,419 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@@ -112,8 +112,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+#include <linux/netfilter/xt_FLOWOFFLOAD.h>
+#include <net/ip.h>
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_flow_table.h>
+#include <net/netfilter/nf_conntrack_extend.h>
+#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_flow_table.h>
+
+static struct nf_flowtable nf_flowtable;
+static HLIST_HEAD(hooks);
@@ -280,21 +281,24 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+}
+
+static bool
+xt_flowoffload_skip(struct sk_buff *skb)
+xt_flowoffload_skip(struct sk_buff *skb, int family)
+{
+ struct ip_options *opt = &(IPCB(skb)->opt);
+
+ if (unlikely(opt->optlen))
+ return true;
+ if (skb_sec_path(skb))
+ return true;
+
+ if (family == NFPROTO_IPV4) {
+ const struct ip_options *opt = &(IPCB(skb)->opt);
+
+ if (unlikely(opt->optlen))
+ return true;
+ }
+
+ return false;
+}
+
+static struct dst_entry *
+xt_flowoffload_dst(const struct nf_conn *ct, enum ip_conntrack_dir dir,
+ const struct xt_action_param *par)
+ const struct xt_action_param *par, int ifindex)
+{
+ struct dst_entry *dst = NULL;
+ struct flowi fl;
@@ -322,8 +326,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+{
+ struct dst_entry *this_dst, *other_dst;
+
+ this_dst = xt_flowoffload_dst(ct, dir, par);
+ other_dst = xt_flowoffload_dst(ct, !dir, par);
+ this_dst = xt_flowoffload_dst(ct, !dir, par, xt_out(par)->ifindex);
+ other_dst = xt_flowoffload_dst(ct, dir, par, xt_in(par)->ifindex);
+ if (!this_dst || !other_dst)
+ return -ENOENT;
+
@@ -331,9 +335,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ return -EINVAL;
+
+ route->tuple[dir].dst = this_dst;
+ route->tuple[dir].ifindex = xt_in(par)->ifindex;
+ route->tuple[!dir].dst = other_dst;
+ route->tuple[!dir].ifindex = xt_out(par)->ifindex;
+
+ return 0;
+}
@@ -342,7 +344,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+flowoffload_tg(struct sk_buff *skb, const struct xt_action_param *par)
+{
+ const struct xt_flowoffload_target_info *info = par->targinfo;
+ const struct nf_conn_help *help;
+ struct tcphdr _tcph, *tcph = NULL;
+ enum ip_conntrack_info ctinfo;
+ enum ip_conntrack_dir dir;
+ struct nf_flow_route route;
@@ -350,7 +352,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ struct nf_conn *ct;
+ struct net *net;
+
+ if (xt_flowoffload_skip(skb))
+ if (xt_flowoffload_skip(skb, xt_family(par)))
+ return XT_CONTINUE;
+
+ ct = nf_ct_get(skb, &ctinfo);
@@ -361,6 +363,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ case IPPROTO_TCP:
+ if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
+ return XT_CONTINUE;
+
+ tcph = skb_header_pointer(skb, par->thoff,
+ sizeof(_tcph), &_tcph);
+ if (unlikely(!tcph || tcph->fin || tcph->rst))
+ return XT_CONTINUE;
+ break;
+ case IPPROTO_UDP:
+ break;
@@ -368,12 +375,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ return XT_CONTINUE;
+ }
+
+ help = nfct_help(ct);
+ if (help)
+ if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
+ ct->status & IPS_SEQ_ADJUST)
+ return XT_CONTINUE;
+
+ if (ctinfo == IP_CT_NEW ||
+ ctinfo == IP_CT_RELATED)
+ if (!nf_ct_is_confirmed(ct))
+ return XT_CONTINUE;
+
+ if (!xt_in(par) || !xt_out(par))
@@ -391,6 +397,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ if (!flow)
+ goto err_flow_alloc;
+
+ if (tcph) {
+ ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
+ ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
+ }
+
+ if (flow_offload_add(&nf_flowtable, flow) < 0)
+ goto err_flow_add;
+