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Add needed patches for shortcut fe

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Ycarus (Yannick Chabanois) 2021-04-15 12:32:34 +02:00
parent f43499c973
commit a55adcd82b
2 changed files with 572 additions and 0 deletions
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319
root/target/linux/generic/hack-5.4/952-net-conntrack-events-support-multiple-registrant.patch Normal file
View file

@ -0,0 +1,319 @@
diff --git a/include/net/netfilter/nf_conntrack_ecache.h b/include/net/netfilter/nf_conntrack_ecache.h
index 12d967b..c2b98b6 100644
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -72,6 +72,10 @@ struct nf_ct_event {
int report;
};
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+extern int nf_conntrack_register_notifier(struct net *net, struct notifier_block *nb);
+extern int nf_conntrack_unregister_notifier(struct net *net, struct notifier_block *nb);
+#else
struct nf_ct_event_notifier {
int (*fcn)(unsigned int events, struct nf_ct_event *item);
};
@@ -80,6 +84,7 @@ int nf_conntrack_register_notifier(struc
struct nf_ct_event_notifier *nb);
void nf_conntrack_unregister_notifier(struct net *net,
struct nf_ct_event_notifier *nb);
+#endif
void nf_ct_deliver_cached_events(struct nf_conn *ct);
int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
@@ -105,11 +110,13 @@ int nf_conntrack_eventmask_report(unsign
nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
- struct net *net = nf_ct_net(ct);
struct nf_conntrack_ecache *e;
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ struct net *net = nf_ct_net(ct);
if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
return;
+#endif
e = nf_ct_ecache_find(ct);
if (e == NULL)
@@ -124,10 +131,12 @@ static inline int
u32 portid, int report)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
const struct net *net = nf_ct_net(ct);
if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
return 0;
+#endif
return nf_conntrack_eventmask_report(1 << event, ct, portid, report);
#else
@@ -139,10 +148,12 @@ nf_conntrack_event_report(enum ip_conntr
nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
{
#ifdef CONFIG_NF_CONNTRACK_EVENTS
+#ifndef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
const struct net *net = nf_ct_net(ct);
if (!rcu_access_pointer(net->ct.nf_conntrack_event_cb))
return 0;
+#endif
return nf_conntrack_eventmask_report(1 << event, ct, 0, 0);
#else
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index e469e85..1d31db8 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -112,7 +112,11 @@ struct netns_ct {
struct ct_pcpu __percpu *pcpu_lists;
struct ip_conntrack_stat __percpu *stat;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ struct atomic_notifier_head nf_conntrack_chain;
+#else
struct nf_ct_event_notifier __rcu *nf_conntrack_event_cb;
+#endif
struct nf_exp_event_notifier __rcu *nf_expect_event_cb;
struct nf_ip_net nf_ct_proto;
#if defined(CONFIG_NF_CONNTRACK_LABELS)
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 63073be..08d7aab 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -148,6 +148,14 @@ config NF_CONNTRACK_RTCACHE
To compile it as a module, choose M here. If unsure, say N.
The module will be called nf_conntrack_rtcache.
+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_TIMEOUT
bool 'Connection tracking timeout'
depends on NETFILTER_ADVANCED
diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 6bd1508..9b81c7c 100644
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -2592,6 +2592,9 @@ int nf_conntrack_init_net(struct net *ne
nf_conntrack_helper_pernet_init(net);
nf_conntrack_proto_pernet_init(net);
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ ATOMIC_INIT_NOTIFIER_HEAD(&net->ct.nf_conntrack_chain);
+#endif
return 0;
err_expect:
diff --git a/net/netfilter/nf_conntrack_ecache.c b/net/netfilter/nf_conntrack_ecache.c
index da9df2d..e0e2a8f 100644
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -17,6 +17,9 @@
#include <linux/stddef.h>
#include <linux/err.h>
#include <linux/percpu.h>
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+#include <linux/notifier.h>
+#endif
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
@@ -117,6 +120,38 @@ static void ecache_work(struct work_stru
schedule_delayed_work(&ctnet->ecache_dwork, delay);
}
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+int
+nf_conntrack_eventmask_report(unsigned int eventmask,
+ struct nf_conn *ct,
+ u32 portid,
+ int report)
+{
+ struct nf_conntrack_ecache *e;
+ struct net *net = nf_ct_net(ct);
+
+ e = nf_ct_ecache_find(ct);
+ if (e == NULL)
+ return 0;
+
+ if (nf_ct_is_confirmed(ct)) {
+ struct nf_ct_event item = {
+ .ct = ct,
+ .portid = e->portid ? e->portid : portid,
+ .report = report
+ };
+ /* This is a resent of a destroy event? If so, skip missed */
+ unsigned long missed = e->portid ? 0 : e->missed;
+
+ if (!((eventmask | missed) & e->ctmask))
+ return 0;
+
+ atomic_notifier_call_chain(&net->ct.nf_conntrack_chain, eventmask | missed, &item);
+ }
+
+ return 0;
+}
+#else
int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
u32 portid, int report)
{
@@ -171,10 +206,52 @@ out_unlock:
rcu_read_unlock();
return ret;
}
+#endif
EXPORT_SYMBOL_GPL(nf_conntrack_eventmask_report);
/* deliver cached events and clear cache entry - must be called with locally
* disabled softirqs */
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+void nf_ct_deliver_cached_events(struct nf_conn *ct)
+{
+ unsigned long events, missed;
+ struct nf_conntrack_ecache *e;
+ struct nf_ct_event item;
+ struct net *net = nf_ct_net(ct);
+
+ e = nf_ct_ecache_find(ct);
+ if (e == NULL)
+ return;
+
+ events = xchg(&e->cache, 0);
+
+ if (!nf_ct_is_confirmed(ct) || nf_ct_is_dying(ct) || !events)
+ return;
+
+ /* We make a copy of the missed event cache without taking
+ * the lock, thus we may send missed events twice. However,
+ * this does not harm and it happens very rarely. */
+ missed = e->missed;
+
+ if (!((events | missed) & e->ctmask))
+ return;
+
+ item.ct = ct;
+ item.portid = 0;
+ item.report = 0;
+
+ atomic_notifier_call_chain(&net->ct.nf_conntrack_chain,
+ events | missed,
+ &item);
+
+ if (likely(!missed))
+ return;
+
+ spin_lock_bh(&ct->lock);
+ e->missed &= ~missed;
+ spin_unlock_bh(&ct->lock);
+}
+#else
void nf_ct_deliver_cached_events(struct nf_conn *ct)
{
struct net *net = nf_ct_net(ct);
@@ -225,6 +302,7 @@ void nf_ct_deliver_cached_events(struct
out_unlock:
rcu_read_unlock();
}
+#endif
EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
void nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
@@ -257,6 +335,12 @@ out_unlock:
rcu_read_unlock();
}
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+int nf_conntrack_register_notifier(struct net *net, struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&net->ct.nf_conntrack_chain, nb);
+}
+#else
int nf_conntrack_register_notifier(struct net *net,
struct nf_ct_event_notifier *new)
{
@@ -277,8 +361,15 @@ out_unlock:
mutex_unlock(&nf_ct_ecache_mutex);
return ret;
}
+#endif
EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier);
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+int nf_conntrack_unregister_notifier(struct net *net, struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&net->ct.nf_conntrack_chain, nb);
+}
+#else
void nf_conntrack_unregister_notifier(struct net *net,
struct nf_ct_event_notifier *new)
{
@@ -292,6 +383,7 @@ void nf_conntrack_unregister_notifier(st
mutex_unlock(&nf_ct_ecache_mutex);
/* synchronize_rcu() is called from ctnetlink_exit. */
}
+#endif
EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier);
int nf_ct_expect_register_notifier(struct net *net,
diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 04111c1..8c741f7 100644
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -32,6 +32,11 @@
#include <linux/siphash.h>
#include <linux/netfilter.h>
+
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+#include <linux/notifier.h>
+#endif
+
#include <net/netlink.h>
#include <net/sock.h>
#include <net/netfilter/nf_conntrack.h>
@@ -676,14 +681,22 @@ static size_t ctnetlink_nlmsg_size(const
;
}
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+static int ctnetlink_conntrack_event(struct notifier_block *this,
+ unsigned long events, void *ptr)
+#else
static int
ctnetlink_conntrack_event(unsigned int events, struct nf_ct_event *item)
+#endif
{
const struct nf_conntrack_zone *zone;
struct net *net;
struct nlmsghdr *nlh;
struct nfgenmsg *nfmsg;
struct nlattr *nest_parms;
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ struct nf_ct_event *item = (struct nf_ct_event *)ptr;
+#endif
struct nf_conn *ct = item->ct;
struct sk_buff *skb;
unsigned int type;
@@ -3504,9 +3517,15 @@ static int ctnetlink_stat_exp_cpu(struct
}
#ifdef CONFIG_NF_CONNTRACK_EVENTS
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+static struct notifier_block ctnl_notifier = {
+ .notifier_call = ctnetlink_conntrack_event,
+};
+#else
static struct nf_ct_event_notifier ctnl_notifier = {
.fcn = ctnetlink_conntrack_event,
};
+#endif
static struct nf_exp_event_notifier ctnl_notifier_exp = {
.fcn = ctnetlink_expect_event,

253
root/target/linux/generic/hack-5.4/953-net-patch-linux-kernel-to-support-shortcut-fe.patch Normal file
View file

@ -0,0 +1,253 @@
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -52,6 +52,9 @@ struct br_ip_list {
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);
+
#if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
int br_multicast_list_adjacent(struct net_device *dev,
struct list_head *br_ip_list);
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -826,6 +826,10 @@ struct sk_buff {
#endif
__u8 gro_skip:1;
+#ifdef CONFIG_SHORTCUT_FE
+ __u16 fast_forwarded:1;
+#endif
+
#ifdef CONFIG_NET_SCHED
__u16 tc_index; /* traffic control index */
#endif
--- a/include/linux/timer.h
+++ b/include/linux/timer.h
@@ -18,6 +18,10 @@ struct timer_list {
void (*function)(struct timer_list *);
u32 flags;
+#ifdef CONFIG_SHORTCUT_FE
+ unsigned long cust_data;
+#endif
+
#ifdef CONFIG_LOCKDEP
struct lockdep_map lockdep_map;
#endif
--- a/include/net/netfilter/nf_conntrack_ecache.h
+++ b/include/net/netfilter/nf_conntrack_ecache.h
@@ -75,6 +75,8 @@ struct nf_ct_event {
#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
extern int nf_conntrack_register_notifier(struct net *net, struct notifier_block *nb);
extern int nf_conntrack_unregister_notifier(struct net *net, struct notifier_block *nb);
+extern int nf_conntrack_register_chain_notifier(struct net *net, struct notifier_block *nb);
+extern int nf_conntrack_unregister_chain_notifier(struct net *net, struct notifier_block *nb);
#else
struct nf_ct_event_notifier {
int (*fcn)(unsigned int events, struct nf_ct_event *item);
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -746,6 +746,28 @@ void br_port_flags_change(struct net_bri
br_recalculate_neigh_suppress_enabled(br);
}
+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);
+
bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag)
{
struct net_bridge_port *p;
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3189,8 +3189,17 @@ static int xmit_one(struct sk_buff *skb, struct net_device *dev,
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 (dev_nit_active(dev))
dev_queue_xmit_nit(skb, dev);
+#ifdef CONFIG_SHORTCUT_FE
+ }
+#endif
#ifdef CONFIG_ETHERNET_PACKET_MANGLE
if (!dev->eth_mangle_tx ||
@@ -4683,6 +4691,11 @@ 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.
@@ -4733,6 +4746,10 @@ static int __netif_receive_skb_core(stru
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);
trace_netif_receive_skb(skb);
@@ -4772,6 +4789,16 @@ 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/Kconfig
+++ b/net/Kconfig
@@ -473,3 +473,6 @@ 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/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -34,11 +34,19 @@
/* 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. */
static int nf_ct_tcp_loose __read_mostly = 1;
--- a/net/netfilter/nf_conntrack_ecache.c
+++ b/net/netfilter/nf_conntrack_ecache.c
@@ -162,7 +162,11 @@ int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
rcu_read_lock();
notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ if (!notify && !rcu_dereference_raw(net->ct.nf_conntrack_chain.head))
+#else
if (!notify)
+#endif
goto out_unlock;
e = nf_ct_ecache_find(ct);
@@ -181,7 +185,14 @@ int nf_conntrack_eventmask_report(unsigned int eventmask, struct nf_conn *ct,
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);
+ if (notify)
+ ret = notify->fcn(eventmask | missed, &item);
+#else
ret = notify->fcn(eventmask | missed, &item);
+#endif
if (unlikely(ret < 0 || missed)) {
spin_lock_bh(&ct->lock);
if (ret < 0) {
@@ -263,7 +274,11 @@ void nf_ct_deliver_cached_events(struct nf_conn *ct)
rcu_read_lock();
notify = rcu_dereference(net->ct.nf_conntrack_event_cb);
+#ifdef CONFIG_NF_CONNTRACK_CHAIN_EVENTS
+ if ((notify == NULL) && !rcu_dereference_raw(net->ct.nf_conntrack_chain.head))
+#else
if (notify == NULL)
+#endif
goto out_unlock;
e = nf_ct_ecache_find(ct);
@@ -287,7 +302,15 @@ void nf_ct_deliver_cached_events(struct nf_conn *ct)
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);
+ if (notify != NULL)
+ ret = notify->fcn(events | missed, &item);
+#else
ret = notify->fcn(events | missed, &item);
+#endif
if (likely(ret == 0 && !missed))
goto out_unlock;
@@ -340,6 +363,11 @@ int nf_conntrack_register_notifier(struct net *net, struct notifier_block *nb)
{
return atomic_notifier_chain_register(&net->ct.nf_conntrack_chain, nb);
}
+int nf_conntrack_register_chain_notifier(struct net *net, struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&net->ct.nf_conntrack_chain, nb);
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_register_chain_notifier);
#else
int nf_conntrack_register_notifier(struct net *net,
struct nf_ct_event_notifier *new)
@@ -369,6 +397,11 @@ int nf_conntrack_unregister_notifier(struct net *net, struct notifier_block *nb)
{
return atomic_notifier_chain_unregister(&net->ct.nf_conntrack_chain, nb);
}
+int nf_conntrack_unregister_chain_notifier(struct net *net, struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&net->ct.nf_conntrack_chain, nb);
+}
+EXPORT_SYMBOL_GPL(nf_conntrack_unregister_chain_notifier);
#else
void nf_conntrack_unregister_notifier(struct net *net,
struct nf_ct_event_notifier *new)