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DHDAXCW-Rockchip-OpenWrt/target/linux/generic/hack-4.19/999-net-patch-linux-kernel-to-support-shortcut-fe.patch
coolsnowwolf 77a8d007cf shortcut-fe:added support for Linux kernel 4.19
2020-07-01 19:26:58 +08:00

236 lines
6.9 KiB
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--- a/include/linux/skbuff.h 2019-01-16 20:16:08.325745306 +0800
+++ b/include/linux/skbuff.h 2019-01-16 20:31:47.288028493 +0800
@@ -783,6 +783,9 @@ struct sk_buff {
__u8 tc_from_ingress:1;
#endif
__u8 gro_skip:1;
+#ifdef CONFIG_SHORTCUT_FE
+ __u8 fast_forwarded:1;
+#endif
#ifdef CONFIG_NET_SCHED
__u16 tc_index; /* traffic control index */
--- a/include/linux/if_bridge.h 2019-01-16 20:51:47.871445535 +0800
+++ b/include/linux/if_bridge.h 2019-01-16 20:52:26.220269649 +0800
@@ -54,6 +54,8 @@ struct br_ip_list {
#define BR_DEFAULT_AGEING_TIME (300 * HZ)
extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
+extern void br_dev_update_stats(struct net_device *dev,
+ struct rtnl_link_stats64 *nlstats);
typedef int br_should_route_hook_t(struct sk_buff *skb);
extern br_should_route_hook_t __rcu *br_should_route_hook;
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -20,6 +20,9 @@ struct timer_list {
void (*function)(unsigned long);
unsigned long data;
u32 flags;
+#ifdef CONFIG_SHORTCUT_FE
+ unsigned long cust_data;
+#endif
#ifdef CONFIG_LOCKDEP
struct lockdep_map lockdep_map;
--- a/net/Kconfig 2019-01-16 20:36:30.266465286 +0800
+++ b/net/Kconfig 2019-01-16 20:36:41.980609067 +0800
@@ -463,3 +463,6 @@ config HAVE_CBPF_JIT
# Extended BPF JIT (eBPF)
config HAVE_EBPF_JIT
bool
+
+config SHORTCUT_FE
+ bool "Enables kernel network stack path for Shortcut Forwarding Engine
--- a/net/core/dev.c 2019-01-16 20:38:37.274933833 +0800
+++ b/net/core/dev.c 2019-01-16 20:44:07.773594898 +0800
@@ -3001,8 +3001,17 @@ static int xmit_one(struct sk_buff *skb,
unsigned int len;
int rc;
+#ifdef CONFIG_SHORTCUT_FE
+ /* If this skb has been fast forwarded then we don't want it to
+ * go to any taps (by definition we're trying to bypass them).
+ */
+ if (!skb->fast_forwarded) {
+#endif
if (!list_empty(&ptype_all) || !list_empty(&dev->ptype_all))
dev_queue_xmit_nit(skb, dev);
+#ifdef CONFIG_SHORTCUT_FE
+ }
+#endif
#ifdef CONFIG_ETHERNET_PACKET_MANGLE
if (!dev->eth_mangle_tx ||
@@ -4315,6 +4324,11 @@ void netdev_rx_handler_unregister(struct
}
EXPORT_SYMBOL_GPL(netdev_rx_handler_unregister);
+#ifdef CONFIG_SHORTCUT_FE
+int (*athrs_fast_nat_recv)(struct sk_buff *skb) __rcu __read_mostly;
+EXPORT_SYMBOL_GPL(athrs_fast_nat_recv);
+#endif
+
/*
* Limit the use of PFMEMALLOC reserves to those protocols that implement
* the special handling of PFMEMALLOC skbs.
@@ -4362,6 +4376,9 @@ static int __netif_receive_skb_core(stru
bool deliver_exact = false;
int ret = NET_RX_DROP;
__be16 type;
+#ifdef CONFIG_SHORTCUT_FE
+ int (*fast_recv)(struct sk_buff *skb);
+#endif
net_timestamp_check(!netdev_tstamp_prequeue, skb);
@@ -4388,6 +4405,16 @@ another_round:
goto out;
}
+#ifdef CONFIG_SHORTCUT_FE
+ fast_recv = rcu_dereference(athrs_fast_nat_recv);
+ if (fast_recv) {
+ if (fast_recv(skb)) {
+ ret = NET_RX_SUCCESS;
+ goto out;
+ }
+ }
+#endif
+
if (skb_skip_tc_classify(skb))
goto skip_classify;
--- a/net/netfilter/nf_conntrack_proto_tcp.c 2019-01-16 20:47:40.886993297 +0800
+++ b/net/netfilter/nf_conntrack_proto_tcp.c 2019-01-16 20:48:57.700570104 +0800
@@ -35,11 +35,17 @@
/* Do not check the TCP window for incoming packets */
static int nf_ct_tcp_no_window_check __read_mostly = 1;
+#ifdef CONFIG_SHORTCUT_FE
+EXPORT_SYMBOL_GPL(nf_ct_tcp_no_window_check);
+#endif
/* "Be conservative in what you do,
be liberal in what you accept from others."
If it's non-zero, we mark only out of window RST segments as INVALID. */
static int nf_ct_tcp_be_liberal __read_mostly = 0;
+#ifdef CONFIG_SHORTCUT_FE
+EXPORT_SYMBOL_GPL(nf_ct_tcp_be_liberal);
+#endif
/* If it is set to zero, we disable picking up already established
connections. */
--- a/net/bridge/br_if.c 2019-01-16 20:54:51.919367044 +0800
+++ b/net/bridge/br_if.c 2019-01-16 20:55:53.812401263 +0800
@@ -653,3 +653,26 @@ void br_port_flags_change(struct net_bri
if (mask & BR_AUTO_MASK)
nbp_update_port_count(br);
}
+
+/* Update bridge statistics for bridge packets processed by offload engines */
+void br_dev_update_stats(struct net_device *dev,
+ struct rtnl_link_stats64 *nlstats)
+{
+ struct net_bridge *br;
+ struct pcpu_sw_netstats *stats;
+
+ /* Is this a bridge? */
+ if (!(dev->priv_flags & IFF_EBRIDGE))
+ return;
+
+ br = netdev_priv(dev);
+ stats = this_cpu_ptr(br->stats);
+
+ u64_stats_update_begin(&stats->syncp);
+ stats->rx_packets += nlstats->rx_packets;
+ stats->rx_bytes += nlstats->rx_bytes;
+ stats->tx_packets += nlstats->tx_packets;
+ stats->tx_bytes += nlstats->tx_bytes;
+ u64_stats_update_end(&stats->syncp);
+}
+EXPORT_SYMBOL_GPL(br_dev_update_stats);
--- a/net/netfilter/Kconfig 2019-01-16 21:07:34.543460920 +0800
+++ b/net/netfilter/Kconfig 2019-01-16 21:08:14.739465937 +0800
@@ -146,6 +146,14 @@ config NF_CONNTRACK_TIMEOUT
If unsure, say `N'.
+config NF_CONNTRACK_CHAIN_EVENTS
+ bool "Register multiple callbacks to ct events"
+ depends on NF_CONNTRACK_EVENTS
+ help
+ Support multiple registrations.
+
+ If unsure, say `N'.
+
config NF_CONNTRACK_TIMESTAMP
bool 'Connection tracking timestamping'
depends on NETFILTER_ADVANCED
--- a/net/netfilter/nf_conntrack_ecache.c 2019-01-16 21:12:22.183462975 +0800
+++ b/net/netfilter/nf_conntrack_ecache.c 2019-01-16 21:26:10.379462031 +0800
@@ -122,13 +125,17 @@ int nf_conntrack_eventmask_report(unsign
{
int ret = 0;
struct net *net = nf_ct_net(ct);
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
struct nf_ct_event_notifier *notify;
+#endif
struct nf_conntrack_ecache *e;
rcu_read_lock();
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
if (!notify)
goto out_unlock;
+#endif
e = nf_ct_ecache_find(ct);
if (!e)
@@ -146,7 +153,12 @@ int nf_conntrack_eventmask_report(unsign
if (!((eventmask | missed) & e->ctmask))
goto out_unlock;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ ret = atomic_notifier_call_chain(&net->ct.nf_conntrack_chain,
+ eventmask | missed, &item);
+#else
ret = notify->fcn(eventmask | missed, &item);
+#endif
if (unlikely(ret < 0 || missed)) {
spin_lock_bh(&ct->lock);
if (ret < 0) {
@@ -179,15 +191,19 @@ void nf_ct_deliver_cached_events(struct
{
struct net *net = nf_ct_net(ct);
unsigned long events, missed;
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
struct nf_ct_event_notifier *notify;
+#endif
struct nf_conntrack_ecache *e;
struct nf_ct_event item;
int ret;
rcu_read_lock();
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
if (notify == NULL)
goto out_unlock;
+#endif
e = nf_ct_ecache_find(ct);
if (e == NULL)
@@ -210,7 +226,13 @@ void nf_ct_deliver_cached_events(struct
item.portid = 0;
item.report = 0;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ ret = atomic_notifier_call_chain(&net->ct.nf_conntrack_chain,
+ events | missed,
+ &item);
+#else
ret = notify->fcn(events | missed, &item);
+#endif
if (likely(ret == 0 && !missed))
goto out_unlock;
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