Revert "kernel: backport act_ctinfo"

This reverts commit 7c50182e.

Produces build error:
Package kmod-sched is missing dependencies for the following libraries:
nf_conntrack.ko

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

package/kernel/linux/modules/netsupport.mk

@@ -803,6 +803,7 @@ endef
 
 $(eval $(call KernelPackage,sched-mqprio))
 
+
 define KernelPackage/sched-connmark
   SUBMENU:=$(NETWORK_SUPPORT_MENU)
   TITLE:=Traffic shaper conntrack mark support
@@ -813,15 +814,6 @@ define KernelPackage/sched-connmark
 endef
 $(eval $(call KernelPackage,sched-connmark))
 
-define KernelPackage/sched-ctinfo
-  SUBMENU:=$(NETWORK_SUPPORT_MENU)
-  TITLE:=Traffic shaper ctinfo support
-  DEPENDS:=+kmod-sched-core +kmod-ipt-core +kmod-ipt-conntrack-extra
-  KCONFIG:=CONFIG_NET_ACT_CTINFO
-  FILES:=$(LINUX_DIR)/net/sched/act_ctinfo.ko
-  AUTOLOAD:=$(call AutoLoad,71, act_ctinfo)
-endef
-$(eval $(call KernelPackage,sched-ctinfo))
 
 define KernelPackage/sched-ipset
   SUBMENU:=$(NETWORK_SUPPORT_MENU)

target/linux/generic/backport-4.14/380-v5.3-net-sched-Introduce-act_ctinfo-action.patch

-From 21d81d05787908b13a4079f42a63a5b3254b7ab4 Mon Sep 17 00:00:00 2001
-From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
-Date: Wed, 13 Mar 2019 20:54:49 +0000
-Subject: [PATCH] net: sched: Introduce act_ctinfo action
-
-ctinfo is a new tc filter action module.  It is designed to restore DSCPs
-stored in conntrack marks
-
-The feature is intended for use and has been found useful for restoring
-ingress classifications based on egress classifications across links
-that bleach or otherwise change DSCP, typically home ISP Internet links.
-Restoring DSCP on ingress on the WAN link allows qdiscs such as CAKE to
-shape inbound packets according to policies that are easier to implement
-on egress.
-
-Ingress classification is traditionally a challenging task since
-iptables rules haven't yet run and tc filter/eBPF programs are pre-NAT
-lookups, hence are unable to see internal IPv4 addresses as used on the
-typical home masquerading gateway.
-
-ctinfo understands the following parameters:
-
-dscp mask[/statemask]
-
-mask - a 32 bit mask of at least 6 contiguous bits where conndscp will
-place the DSCP in conntrack mark.  The DSCP is left-shifted by the
-number of unset lower bits of the mask before storing into the mark
-field.
-
-statemask - a 32 bit mask of (usually) 1 bit length, outside the area
-specified by mask.  This represents a conditional operation flag the
-DSCP is only restored if the flag is set.  This is useful to implement a
-'one shot' iptables based classification where the 'complicated'
-iptables rules are only run once to classify the connection on initial
-(egress) packet and subsequent packets are all marked/restored with the
-same DSCP.  A mask of zero disables the conditional behaviour.
-
-optional parameters:
-
-zone - conntrack zone
-
-control - action related control (reclassify | pipe | drop | continue |
-ok | goto chain <CHAIN_INDEX>
-
-Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
----
- include/net/tc_act/tc_ctinfo.h        |  28 ++
- include/uapi/linux/pkt_cls.h          |   3 +-
- include/uapi/linux/tc_act/tc_ctinfo.h |  34 +++
- net/sched/Kconfig                     |  13 +
- net/sched/Makefile                    |   1 +
- net/sched/act_ctinfo.c                | 394 ++++++++++++++++++++++++++
- 6 files changed, 472 insertions(+), 1 deletion(-)
- create mode 100644 include/net/tc_act/tc_ctinfo.h
- create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h
- create mode 100644 net/sched/act_ctinfo.c
-
-diff --git a/include/net/tc_act/tc_ctinfo.h b/include/net/tc_act/tc_ctinfo.h
-new file mode 100644
-index 000000000000..d6a688571672
---- /dev/null
-+++ b/include/net/tc_act/tc_ctinfo.h
-@@ -0,0 +1,28 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
-+#ifndef __NET_TC_CTINFO_H
-+#define __NET_TC_CTINFO_H
-+
-+#include <net/act_api.h>
-+
-+struct tcf_ctinfo_params {
-+	struct rcu_head rcu;
-+	struct net *net;
-+	u32 dscpmask;
-+	u32 dscpstatemask;
-+	u32 cpmarkmask;
-+	u16 zone;
-+	u8 mode;
-+	u8 dscpmaskshift;
-+};
-+
-+struct tcf_ctinfo {
-+	struct tc_action common;
-+	struct tcf_ctinfo_params __rcu *params;
-+	u64 stats_dscp_set;
-+	u64 stats_dscp_error;
-+	u64 stats_cpmark_set;
-+};
-+
-+#define to_ctinfo(a) ((struct tcf_ctinfo *)a)
-+
-+#endif /* __NET_TC_CTINFO_H */
-diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
-index 46c506615f4a..408b02fbb34a 100644
---- a/include/uapi/linux/pkt_cls.h
-+++ b/include/uapi/linux/pkt_cls.h
-@@ -66,7 +66,8 @@ enum {
- 	TCA_ID_UNSPEC=0,
- 	TCA_ID_POLICE=1,
- 	/* other actions go here */
--	__TCA_ID_MAX=255
-+	TCA_ID_CTINFO=27,
-+	__TCA_ID_MAX = 255
- };
- 
- #define TCA_ID_MAX __TCA_ID_MAX
-diff --git a/include/uapi/linux/tc_act/tc_ctinfo.h b/include/uapi/linux/tc_act/tc_ctinfo.h
-new file mode 100644
-index 000000000000..da803e05a89b
---- /dev/null
-+++ b/include/uapi/linux/tc_act/tc_ctinfo.h
-@@ -0,0 +1,34 @@
-+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-+#ifndef __UAPI_TC_CTINFO_H
-+#define __UAPI_TC_CTINFO_H
-+
-+#include <linux/types.h>
-+#include <linux/pkt_cls.h>
-+
-+struct tc_ctinfo {
-+	tc_gen;
-+};
-+
-+enum {
-+	TCA_CTINFO_UNSPEC,
-+	TCA_CTINFO_PAD,
-+	TCA_CTINFO_TM,
-+	TCA_CTINFO_ACT,
-+	TCA_CTINFO_ZONE,
-+	TCA_CTINFO_PARMS_DSCP_MASK,
-+	TCA_CTINFO_PARMS_DSCP_STATEMASK,
-+	TCA_CTINFO_PARMS_CPMARK_MASK,
-+	TCA_CTINFO_STATS_DSCP_SET,
-+	TCA_CTINFO_STATS_DSCP_ERROR,
-+	TCA_CTINFO_STATS_CPMARK_SET,
-+	__TCA_CTINFO_MAX
-+};
-+
-+#define TCA_CTINFO_MAX (__TCA_CTINFO_MAX - 1)
-+
-+enum {
-+	CTINFO_MODE_DSCP	= BIT(0),
-+	CTINFO_MODE_CPMARK	= BIT(1)
-+};
-+
-+#endif
-diff --git a/net/sched/Kconfig b/net/sched/Kconfig
-index e70ed26485a2..962d90f72f54 100644
---- a/net/sched/Kconfig
-+++ b/net/sched/Kconfig
-@@ -808,6 +808,19 @@ config NET_ACT_CONNMARK
- 	  To compile this code as a module, choose M here: the
- 	  module will be called act_connmark.
- 
-+config NET_ACT_CTINFO
-+        tristate "Netfilter Connmark to DSCP Retriever"
-+        depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES
-+        depends on NF_CONNTRACK && NF_CONNTRACK_MARK
-+        help
-+	  Say Y here to allow transfer of a connmark stored DSCP into
-+	  ipv4/v6 diffserv
-+
-+	  If unsure, say N.
-+
-+	  To compile this code as a module, choose M here: the
-+	  module will be called act_ctinfo.
-+
- config NET_ACT_SKBMOD
-         tristate "skb data modification action"
-         depends on NET_CLS_ACT
-diff --git a/net/sched/Makefile b/net/sched/Makefile
-index 9e43a4721ef8..44ee5b87b895 100644
---- a/net/sched/Makefile
-+++ b/net/sched/Makefile
-@@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_CSUM)	+= act_csum.o
- obj-$(CONFIG_NET_ACT_VLAN)	+= act_vlan.o
- obj-$(CONFIG_NET_ACT_BPF)	+= act_bpf.o
- obj-$(CONFIG_NET_ACT_CONNMARK)	+= act_connmark.o
-+obj-$(CONFIG_NET_ACT_CTINFO)	+= act_ctinfo.o
- obj-$(CONFIG_NET_ACT_SKBMOD)	+= act_skbmod.o
- obj-$(CONFIG_NET_ACT_IFE)	+= act_ife.o
- obj-$(CONFIG_NET_IFE_SKBMARK)	+= act_meta_mark.o
-diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c
-new file mode 100644
-index 000000000000..e65344e32801
---- /dev/null
-+++ b/net/sched/act_ctinfo.c
-@@ -0,0 +1,394 @@
-+// SPDX-License-Identifier: GPL-2.0+
-+/* net/sched/act_ctinfo.c  netfilter ctinfo connmark actions
-+ *
-+ * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/kernel.h>
-+#include <linux/skbuff.h>
-+#include <linux/rtnetlink.h>
-+#include <linux/pkt_cls.h>
-+#include <linux/ip.h>
-+#include <linux/ipv6.h>
-+#include <net/netlink.h>
-+#include <net/pkt_sched.h>
-+#include <net/act_api.h>
-+#include <net/pkt_cls.h>
-+#include <uapi/linux/tc_act/tc_ctinfo.h>
-+#include <net/tc_act/tc_ctinfo.h>
-+
-+#include <net/netfilter/nf_conntrack.h>
-+#include <net/netfilter/nf_conntrack_core.h>
-+#include <net/netfilter/nf_conntrack_ecache.h>
-+#include <net/netfilter/nf_conntrack_zones.h>
-+
-+static struct tc_action_ops act_ctinfo_ops;
-+static unsigned int ctinfo_net_id;
-+
-+static void tcf_ctinfo_dscp_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
-+				struct tcf_ctinfo_params *cp,
-+				struct sk_buff *skb, int wlen, int proto)
-+{
-+	u8 dscp,newdscp;
-+
-+	newdscp = (((ct->mark & cp->dscpmask) >> cp->dscpmaskshift) << 2) &
-+		     ~INET_ECN_MASK;
-+
-+	/* mark contains DSCP so restore DSCP bits from ct->mark into diffserv */
-+	/* using overlimits stats to count how many DSCP updates	       */
-+	switch (proto) {
-+	case NFPROTO_IPV4:
-+		dscp = ipv4_get_dsfield(ip_hdr(skb)) & ~INET_ECN_MASK;
-+		if (dscp != newdscp) {
-+			if (likely(!skb_try_make_writable(skb, wlen))) {
-+				ipv4_change_dsfield(ip_hdr(skb),
-+						    INET_ECN_MASK,
-+						    newdscp);
-+				ca->stats_dscp_set++;
-+			} else {
-+				ca->stats_dscp_error++;
-+			}
-+		}
-+		break;
-+	case NFPROTO_IPV6:
-+		dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & ~INET_ECN_MASK;
-+		if (dscp != newdscp) {
-+			if (likely(!skb_try_make_writable(skb, wlen))) {
-+				ipv6_change_dsfield(ipv6_hdr(skb),
-+						    INET_ECN_MASK,
-+						    newdscp);
-+				ca->stats_dscp_set++;
-+			} else {
-+				ca->stats_dscp_error++;
-+			}
-+		}
-+		break;
-+	default:
-+		break;
-+	}
-+}
-+
-+static void tcf_ctinfo_cpmark_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
-+				struct tcf_ctinfo_params *cp,
-+				struct sk_buff *skb)
-+{
-+	ca->stats_cpmark_set++;
-+	skb->mark = ct->mark & cp->cpmarkmask;
-+}
-+
-+static int tcf_ctinfo_act(struct sk_buff *skb, const struct tc_action *a,
-+			  struct tcf_result *res)
-+{
-+	const struct nf_conntrack_tuple_hash *thash = NULL;
-+	struct tcf_ctinfo *ca = to_ctinfo(a);
-+	struct nf_conntrack_tuple tuple;
-+	struct nf_conntrack_zone zone;
-+	enum ip_conntrack_info ctinfo;
-+	struct tcf_ctinfo_params *cp;
-+	struct nf_conn *ct;
-+	int proto, wlen;
-+	int action;
-+
-+	cp = rcu_dereference_bh(ca->params);
-+
-+	tcf_lastuse_update(&ca->tcf_tm);
-+	bstats_update(&ca->tcf_bstats, skb);
-+	action = READ_ONCE(ca->tcf_action);
-+
-+	wlen = skb_network_offset(skb);
-+	if (tc_skb_protocol(skb) == htons(ETH_P_IP)) {
-+		wlen += sizeof(struct iphdr);
-+		if (!pskb_may_pull(skb, wlen))
-+			goto out;
-+
-+		proto = NFPROTO_IPV4;
-+	} else if (tc_skb_protocol(skb) == htons(ETH_P_IPV6)) {
-+		wlen += sizeof(struct ipv6hdr);
-+		if (!pskb_may_pull(skb, wlen))
-+			goto out;
-+
-+		proto = NFPROTO_IPV6;
-+	} else {
-+		goto out;
-+	}
-+
-+	ct = nf_ct_get(skb, &ctinfo);
-+	if (!ct) { /* look harder, usually ingress */
-+		if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb),
-+				       proto, cp->net, &tuple))
-+			goto out;
-+		zone.id = cp->zone;
-+		zone.dir = NF_CT_DEFAULT_ZONE_DIR;
-+
-+		thash = nf_conntrack_find_get(cp->net, &zone, &tuple);
-+		if (!thash)
-+			goto out;
-+
-+		ct = nf_ct_tuplehash_to_ctrack(thash);
-+	}
-+
-+	if (cp->mode & CTINFO_MODE_DSCP)
-+		if (!cp->dscpstatemask || (ct->mark & cp->dscpstatemask))
-+			tcf_ctinfo_dscp_set(ct, ca, cp, skb, wlen, proto);
-+
-+	if (cp->mode & CTINFO_MODE_CPMARK)
-+		tcf_ctinfo_cpmark_set(ct, ca, cp, skb);
-+
-+	if (thash)
-+		nf_ct_put(ct);
-+out:
-+	return action;
-+}
-+
-+static const struct nla_policy ctinfo_policy[TCA_CTINFO_MAX + 1] = {
-+	[TCA_CTINFO_ACT]		  = { .len = sizeof(struct
-+							    tc_ctinfo) },
-+	[TCA_CTINFO_ZONE]		  = { .type = NLA_U16 },
-+	[TCA_CTINFO_PARMS_DSCP_MASK]	  = { .type = NLA_U32 },
-+	[TCA_CTINFO_PARMS_DSCP_STATEMASK] = { .type = NLA_U32 },
-+	[TCA_CTINFO_PARMS_CPMARK_MASK]	  = { .type = NLA_U32 },
-+};
-+
-+static int tcf_ctinfo_init(struct net *net, struct nlattr *nla,
-+			     struct nlattr *est, struct tc_action **a,
-+			     int ovr, int bind)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+	struct nlattr *tb[TCA_CTINFO_MAX + 1];
-+	struct tcf_ctinfo_params *cp_new;
-+/*	struct tcf_chain *goto_ch = NULL; */
-+	u32 dscpmask = 0, dscpstatemask;
-+	struct tc_ctinfo *actparm;
-+	struct tcf_ctinfo *ci;
-+	u8 dscpmaskshift;
-+	int ret = 0, err;
-+
-+	if (!nla)
-+		return -EINVAL;
-+
-+	err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, NULL);
-+	if (err < 0)
-+		return err;
-+
-+	if (!tb[TCA_CTINFO_ACT])
-+		return -EINVAL;
-+	actparm = nla_data(tb[TCA_CTINFO_ACT]);
-+
-+	/* do some basic validation here before dynamically allocating things */
-+	/* that we would otherwise have to clean up.			      */
-+	if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) {
-+		dscpmask = nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_MASK]);
-+		/* need contiguous 6 bit mask */
-+		dscpmaskshift = dscpmask ? __ffs(dscpmask) : 0;
-+		if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f)
-+			return -EINVAL;
-+		dscpstatemask = tb[TCA_CTINFO_PARMS_DSCP_STATEMASK] ?
-+			nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) : 0;
-+		/* mask & statemask must not overlap */
-+		if (dscpmask & dscpstatemask)
-+			return -EINVAL;
-+	}
-+	/* done the validation:now to the actual action allocation */
-+	err = tcf_idr_check(tn, actparm->index, a, bind);
-+	if (!err) {
-+		ret = tcf_idr_create(tn, actparm->index, est, a,
-+				     &act_ctinfo_ops, bind, false);
-+		if (ret) {
-+		/*	tcf_idr_cleanup(tn, actparm->index); */
-+			return ret;
-+		}
-+		ret = ACT_P_CREATED;
-+	} else if (err > 0) {
-+		if (bind) /* don't override defaults */
-+			return 0;
-+		if (!ovr) {
-+			tcf_idr_release(*a, bind);
-+			return -EEXIST;
-+		}
-+	} else {
-+		return err;
-+	}
-+
-+/*	err = tcf_action_check_ctrlact(actparm->action, tp, &goto_ch, extack);
-+	if (err < 0)
-+		goto release_idr;
-+		*/
-+
-+	ci = to_ctinfo(*a);
-+
-+	cp_new = kzalloc(sizeof(*cp_new), GFP_KERNEL);
-+	if (unlikely(!cp_new)) {
-+		err = -ENOMEM;
-+		goto put_chain;
-+	}
-+
-+	cp_new->net = net;
-+	cp_new->zone = tb[TCA_CTINFO_ZONE] ?
-+			nla_get_u16(tb[TCA_CTINFO_ZONE]) : 0;
-+	if (dscpmask) {
-+		cp_new->dscpmask = dscpmask;
-+		cp_new->dscpmaskshift = dscpmaskshift;
-+		cp_new->dscpstatemask = dscpstatemask;
-+		cp_new->mode |= CTINFO_MODE_DSCP;
-+	}
-+
-+	if (tb[TCA_CTINFO_PARMS_CPMARK_MASK]) {
-+		cp_new->cpmarkmask = nla_get_u32(tb[TCA_CTINFO_PARMS_CPMARK_MASK]);
-+		cp_new->mode |= CTINFO_MODE_CPMARK;
-+	}
-+
-+	spin_lock_bh(&ci->tcf_lock);
-+/*	goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); */
-+	ci->tcf_action = actparm->action;
-+	rcu_swap_protected(ci->params, cp_new,
-+				lockdep_is_held(&ci->tcf_lock));
-+	spin_unlock_bh(&ci->tcf_lock);
-+
-+/*	if (goto_ch)
-+		tcf_chain_put_by_act(goto_ch); */
-+	if (cp_new)
-+		kfree_rcu(cp_new, rcu);
-+
-+	if (ret == ACT_P_CREATED)
-+		tcf_idr_insert(tn, *a);
-+
-+	return ret;
-+
-+put_chain:
-+/*	if (goto_ch)
-+		tcf_chain_put_by_act(goto_ch); */
-+/*release_idr:*/
-+	tcf_idr_release(*a, bind);
-+	return err;
-+}
-+
-+static int tcf_ctinfo_dump(struct sk_buff *skb, struct tc_action *a,
-+			   int bind, int ref)
-+{
-+	struct tcf_ctinfo *ci = to_ctinfo(a);
-+	struct tc_ctinfo opt = {
-+		.index   = ci->tcf_index,
-+		.refcnt  = ci->tcf_refcnt - ref,
-+		.bindcnt = ci->tcf_bindcnt - bind,
-+	};
-+	unsigned char *b = skb_tail_pointer(skb);
-+	struct tcf_ctinfo_params *cp;
-+	struct tcf_t t;
-+
-+	spin_lock_bh(&ci->tcf_lock);
-+	cp = rcu_dereference_protected(ci->params,
-+				       lockdep_is_held(&ci->tcf_lock));
-+
-+	tcf_tm_dump(&t, &ci->tcf_tm);
-+	if (nla_put_64bit(skb, TCA_CTINFO_TM, sizeof(t), &t, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	opt.action = ci->tcf_action;
-+	if (nla_put(skb, TCA_CTINFO_ACT, sizeof(opt), &opt))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u16(skb, TCA_CTINFO_ZONE, cp->zone))
-+		goto nla_put_failure;
-+
-+	if (cp->mode & CTINFO_MODE_DSCP) {
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_MASK,
-+				cp->dscpmask))
-+			goto nla_put_failure;
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_STATEMASK,
-+				cp->dscpstatemask))
-+			goto nla_put_failure;
-+	}
-+
-+	if (cp->mode & CTINFO_MODE_CPMARK) {
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_CPMARK_MASK,
-+				cp->cpmarkmask))
-+			goto nla_put_failure;
-+	}
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_SET,
-+			      ci->stats_dscp_set, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_ERROR,
-+			      ci->stats_dscp_error, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_CPMARK_SET,
-+			      ci->stats_cpmark_set, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	spin_unlock_bh(&ci->tcf_lock);
-+	return skb->len;
-+
-+nla_put_failure:
-+	spin_unlock_bh(&ci->tcf_lock);
-+	nlmsg_trim(skb, b);
-+	return -1;
-+}
-+
-+static int tcf_ctinfo_walker(struct net *net, struct sk_buff *skb,
-+			       struct netlink_callback *cb, int type,
-+			       const struct tc_action_ops *ops)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tcf_generic_walker(tn, skb, cb, type, ops);
-+}
-+
-+static int tcf_ctinfo_search(struct net *net, struct tc_action **a, u32 index)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tcf_idr_search(tn, a, index);
-+}
-+
-+static struct tc_action_ops act_ctinfo_ops = {
-+	.kind	= "ctinfo",
-+	.type	= TCA_ID_CTINFO,
-+	.owner	= THIS_MODULE,
-+	.act	= tcf_ctinfo_act,
-+	.dump	= tcf_ctinfo_dump,
-+	.init	= tcf_ctinfo_init,
-+	.walk	= tcf_ctinfo_walker,
-+	.lookup	= tcf_ctinfo_search,
-+	.size	= sizeof(struct tcf_ctinfo),
-+};
-+
-+static __net_init int ctinfo_init_net(struct net *net)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tc_action_net_init(tn, &act_ctinfo_ops);
-+}
-+
-+static void __net_exit ctinfo_exit_net(struct net *net)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	tc_action_net_exit(tn);
-+}
-+
-+static struct pernet_operations ctinfo_net_ops = {
-+	.init = ctinfo_init_net,
-+	.exit = ctinfo_exit_net,
-+	.id   = &ctinfo_net_id,
-+	.size = sizeof(struct tc_action_net),
-+};
-+
-+static int __init ctinfo_init_module(void)
-+{
-+	return tcf_register_action(&act_ctinfo_ops, &ctinfo_net_ops);
-+}
-+
-+static void __exit ctinfo_cleanup_module(void)
-+{
-+	tcf_unregister_action(&act_ctinfo_ops, &ctinfo_net_ops);
-+}
-+
-+module_init(ctinfo_init_module);
-+module_exit(ctinfo_cleanup_module);
-+MODULE_AUTHOR("Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>");
-+MODULE_DESCRIPTION("Conntrack mark to DSCP restoring");
-+MODULE_LICENSE("GPL");
--- 
-2.20.1 (Apple Git-117)
-

target/linux/generic/backport-4.19/380-v5.3-net-sched-Introduce-act_ctinfo-action.patch

-From 402c8d61d2f27060be14849fcb30682f75f3bf3b Mon Sep 17 00:00:00 2001
-From: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
-Date: Wed, 13 Mar 2019 20:54:49 +0000
-Subject: [PATCH] net: sched: Introduce act_ctinfo action
-
-ctinfo is a new tc filter action module.  It is designed to restore DSCPs
-stored in conntrack marks into the ipv4/v6 diffserv field.
-
-The feature is intended for use and has been found useful for restoring
-ingress classifications based on egress classifications across links
-that bleach or otherwise change DSCP, typically home ISP Internet links.
-Restoring DSCP on ingress on the WAN link allows qdiscs such as CAKE to
-shape inbound packets according to policies that are easier to indicate
-on egress.
-
-Ingress classification is traditionally a challenging task since
-iptables rules haven't yet run and tc filter/eBPF programs are pre-NAT
-lookups, hence are unable to see internal IPv4 addresses as used on the
-typical home masquerading gateway.
-
-ctinfo understands the following parameters:
-
-dscp dscpmask[/statemask]
-
-dscpmask - a 32 bit mask of at least 6 contiguous bits and indicates
-where ctinfo will find the DSCP bits stored in the conntrack mark.
-
-statemask - a 32 bit mask of (usually) 1 bit length, outside the area
-specified by dscpmask.  This represents a conditional operation flag
-whereby the DSCP is only restored if the flag is set.  This is useful to
-implement a 'one shot' iptables based classification where the
-'complicated' iptables rules are only run once to classify the
-connection on initial (egress) packet and subsequent packets are all
-marked/restored with the same DSCP.  A mask of zero disables the
-conditional behaviour ie. the conntrack mark DSCP bits are always
-restored to the ip diffserv field (assuming the conntrack entry is found
-& the skb is an ipv4/ipv6 type)
-
-optional parameters:
-
-zone - conntrack zone
-
-control - action related control (reclassify | pipe | drop | continue |
-ok | goto chain <CHAIN_INDEX>)
-
-e.g. dscp 0xfc000000/0x01000000
-
-|----0xFC----conntrack mark----000000---|
-| Bits 31-26 | bit 25 | bit24 |~~~ Bit 0|
-| DSCP       | unused | flag  |unused   |
-|-----------------------0x01---000000---|
-      |                   |
-      |                   |
-      ---|             Conditional flag
-         v             only restore if set
-|-ip diffserv-|
-| 6 bits      |
-|-------------|
-
-Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
----
- include/net/tc_act/tc_ctinfo.h            |  28 ++
- include/uapi/linux/pkt_cls.h              |   3 +-
- include/uapi/linux/tc_act/tc_ctinfo.h     |  34 ++
- net/sched/Kconfig                         |  17 +
- net/sched/Makefile                        |   1 +
- net/sched/act_ctinfo.c                    | 395 ++++++++++++++++++++++
- tools/testing/selftests/tc-testing/config |   1 +
- 7 files changed, 478 insertions(+), 1 deletion(-)
- create mode 100644 include/net/tc_act/tc_ctinfo.h
- create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h
- create mode 100644 net/sched/act_ctinfo.c
-
-diff --git a/include/net/tc_act/tc_ctinfo.h b/include/net/tc_act/tc_ctinfo.h
-new file mode 100644
-index 000000000000..d6a688571672
---- /dev/null
-+++ b/include/net/tc_act/tc_ctinfo.h
-@@ -0,0 +1,28 @@
-+/* SPDX-License-Identifier: GPL-2.0 */
-+#ifndef __NET_TC_CTINFO_H
-+#define __NET_TC_CTINFO_H
-+
-+#include <net/act_api.h>
-+
-+struct tcf_ctinfo_params {
-+	struct rcu_head rcu;
-+	struct net *net;
-+	u32 dscpmask;
-+	u32 dscpstatemask;
-+	u32 cpmarkmask;
-+	u16 zone;
-+	u8 mode;
-+	u8 dscpmaskshift;
-+};
-+
-+struct tcf_ctinfo {
-+	struct tc_action common;
-+	struct tcf_ctinfo_params __rcu *params;
-+	u64 stats_dscp_set;
-+	u64 stats_dscp_error;
-+	u64 stats_cpmark_set;
-+};
-+
-+#define to_ctinfo(a) ((struct tcf_ctinfo *)a)
-+
-+#endif /* __NET_TC_CTINFO_H */
-diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
-index be382fb0592d..71e10c5a96a0 100644
---- a/include/uapi/linux/pkt_cls.h
-+++ b/include/uapi/linux/pkt_cls.h
-@@ -68,7 +68,8 @@ enum {
- 	TCA_ID_UNSPEC=0,
- 	TCA_ID_POLICE=1,
- 	/* other actions go here */
--	__TCA_ID_MAX=255
-+	TCA_ID_CTINFO,
-+	__TCA_ID_MAX = 255
- };
- 
- #define TCA_ID_MAX __TCA_ID_MAX
-diff --git a/include/uapi/linux/tc_act/tc_ctinfo.h b/include/uapi/linux/tc_act/tc_ctinfo.h
-new file mode 100644
-index 000000000000..da803e05a89b
---- /dev/null
-+++ b/include/uapi/linux/tc_act/tc_ctinfo.h
-@@ -0,0 +1,34 @@
-+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-+#ifndef __UAPI_TC_CTINFO_H
-+#define __UAPI_TC_CTINFO_H
-+
-+#include <linux/types.h>
-+#include <linux/pkt_cls.h>
-+
-+struct tc_ctinfo {
-+	tc_gen;
-+};
-+
-+enum {
-+	TCA_CTINFO_UNSPEC,
-+	TCA_CTINFO_PAD,
-+	TCA_CTINFO_TM,
-+	TCA_CTINFO_ACT,
-+	TCA_CTINFO_ZONE,
-+	TCA_CTINFO_PARMS_DSCP_MASK,
-+	TCA_CTINFO_PARMS_DSCP_STATEMASK,
-+	TCA_CTINFO_PARMS_CPMARK_MASK,
-+	TCA_CTINFO_STATS_DSCP_SET,
-+	TCA_CTINFO_STATS_DSCP_ERROR,
-+	TCA_CTINFO_STATS_CPMARK_SET,
-+	__TCA_CTINFO_MAX
-+};
-+
-+#define TCA_CTINFO_MAX (__TCA_CTINFO_MAX - 1)
-+
-+enum {
-+	CTINFO_MODE_DSCP	= BIT(0),
-+	CTINFO_MODE_CPMARK	= BIT(1)
-+};
-+
-+#endif
-diff --git a/net/sched/Kconfig b/net/sched/Kconfig
-index e95741388311..1d79d5dba6e4 100644
---- a/net/sched/Kconfig
-+++ b/net/sched/Kconfig
-@@ -866,6 +866,23 @@ config NET_ACT_CONNMARK
- 	  To compile this code as a module, choose M here: the
- 	  module will be called act_connmark.
- 
-+config NET_ACT_CTINFO
-+        tristate "Netfilter Connection Mark Actions"
-+        depends on NET_CLS_ACT && NETFILTER && IP_NF_IPTABLES
-+        depends on NF_CONNTRACK && NF_CONNTRACK_MARK
-+        help
-+	  Say Y here to allow transfer of a connmark stored information.
-+	  Current actions transfer connmark stored DSCP into
-+	  ipv4/v6 diffserv and/or to transfer connmark to packet
-+	  mark.  Both are useful for restoring egress based marks
-+	  back onto ingress connections for qdisc priority mapping
-+	  purposes.
-+
-+	  If unsure, say N.
-+
-+	  To compile this code as a module, choose M here: the
-+	  module will be called act_ctinfo.
-+
- config NET_ACT_SKBMOD
-         tristate "skb data modification action"
-         depends on NET_CLS_ACT
-diff --git a/net/sched/Makefile b/net/sched/Makefile
-index f0403f49edcb..bb3c2bc44af7 100644
---- a/net/sched/Makefile
-+++ b/net/sched/Makefile
-@@ -21,6 +21,7 @@ obj-$(CONFIG_NET_ACT_CSUM)	+= act_csum.o
- obj-$(CONFIG_NET_ACT_VLAN)	+= act_vlan.o
- obj-$(CONFIG_NET_ACT_BPF)	+= act_bpf.o
- obj-$(CONFIG_NET_ACT_CONNMARK)	+= act_connmark.o
-+obj-$(CONFIG_NET_ACT_CTINFO)	+= act_ctinfo.o
- obj-$(CONFIG_NET_ACT_SKBMOD)	+= act_skbmod.o
- obj-$(CONFIG_NET_ACT_IFE)	+= act_ife.o
- obj-$(CONFIG_NET_IFE_SKBMARK)	+= act_meta_mark.o
-diff --git a/net/sched/act_ctinfo.c b/net/sched/act_ctinfo.c
-new file mode 100644
-index 000000000000..8975cb4976aa
---- /dev/null
-+++ b/net/sched/act_ctinfo.c
-@@ -0,0 +1,395 @@
-+// SPDX-License-Identifier: GPL-2.0+
-+/* net/sched/act_ctinfo.c  netfilter ctinfo connmark actions
-+ *
-+ * Copyright (c) 2019 Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/kernel.h>
-+#include <linux/skbuff.h>
-+#include <linux/rtnetlink.h>
-+#include <linux/pkt_cls.h>
-+#include <linux/ip.h>
-+#include <linux/ipv6.h>
-+#include <net/netlink.h>
-+#include <net/pkt_sched.h>
-+#include <net/act_api.h>
-+#include <net/pkt_cls.h>
-+#include <uapi/linux/tc_act/tc_ctinfo.h>
-+#include <net/tc_act/tc_ctinfo.h>
-+
-+#include <net/netfilter/nf_conntrack.h>
-+#include <net/netfilter/nf_conntrack_core.h>
-+#include <net/netfilter/nf_conntrack_ecache.h>
-+#include <net/netfilter/nf_conntrack_zones.h>
-+
-+static struct tc_action_ops act_ctinfo_ops;
-+static unsigned int ctinfo_net_id;
-+
-+static void tcf_ctinfo_dscp_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
-+				struct tcf_ctinfo_params *cp,
-+				struct sk_buff *skb, int wlen, int proto)
-+{
-+	u8 dscp, newdscp;
-+
-+	newdscp = (((ct->mark & cp->dscpmask) >> cp->dscpmaskshift) << 2) &
-+		     ~INET_ECN_MASK;
-+
-+	switch (proto) {
-+	case NFPROTO_IPV4:
-+		dscp = ipv4_get_dsfield(ip_hdr(skb)) & ~INET_ECN_MASK;
-+		if (dscp != newdscp) {
-+			if (likely(!skb_try_make_writable(skb, wlen))) {
-+				ipv4_change_dsfield(ip_hdr(skb),
-+						    INET_ECN_MASK,
-+						    newdscp);
-+				ca->stats_dscp_set++;
-+			} else {
-+				ca->stats_dscp_error++;
-+			}
-+		}
-+		break;
-+	case NFPROTO_IPV6:
-+		dscp = ipv6_get_dsfield(ipv6_hdr(skb)) & ~INET_ECN_MASK;
-+		if (dscp != newdscp) {
-+			if (likely(!skb_try_make_writable(skb, wlen))) {
-+				ipv6_change_dsfield(ipv6_hdr(skb),
-+						    INET_ECN_MASK,
-+						    newdscp);
-+				ca->stats_dscp_set++;
-+			} else {
-+				ca->stats_dscp_error++;
-+			}
-+		}
-+		break;
-+	default:
-+		break;
-+	}
-+}
-+
-+static void tcf_ctinfo_cpmark_set(struct nf_conn *ct, struct tcf_ctinfo *ca,
-+				  struct tcf_ctinfo_params *cp,
-+				  struct sk_buff *skb)
-+{
-+	ca->stats_cpmark_set++;
-+	skb->mark = ct->mark & cp->cpmarkmask;
-+}
-+
-+static int tcf_ctinfo_act(struct sk_buff *skb, const struct tc_action *a,
-+			  struct tcf_result *res)
-+{
-+	const struct nf_conntrack_tuple_hash *thash = NULL;
-+	struct tcf_ctinfo *ca = to_ctinfo(a);
-+	struct nf_conntrack_tuple tuple;
-+	struct nf_conntrack_zone zone;
-+	enum ip_conntrack_info ctinfo;
-+	struct tcf_ctinfo_params *cp;
-+	struct nf_conn *ct;
-+	int proto, wlen;
-+	int action;
-+
-+	cp = rcu_dereference_bh(ca->params);
-+
-+	tcf_lastuse_update(&ca->tcf_tm);
-+	bstats_update(&ca->tcf_bstats, skb);
-+	action = READ_ONCE(ca->tcf_action);
-+
-+	wlen = skb_network_offset(skb);
-+	if (tc_skb_protocol(skb) == htons(ETH_P_IP)) {
-+		wlen += sizeof(struct iphdr);
-+		if (!pskb_may_pull(skb, wlen))
-+			goto out;
-+
-+		proto = NFPROTO_IPV4;
-+	} else if (tc_skb_protocol(skb) == htons(ETH_P_IPV6)) {
-+		wlen += sizeof(struct ipv6hdr);
-+		if (!pskb_may_pull(skb, wlen))
-+			goto out;
-+
-+		proto = NFPROTO_IPV6;
-+	} else {
-+		goto out;
-+	}
-+
-+	ct = nf_ct_get(skb, &ctinfo);
-+	if (!ct) { /* look harder, usually ingress */
-+		if (!nf_ct_get_tuplepr(skb, skb_network_offset(skb),
-+				       proto, cp->net, &tuple))
-+			goto out;
-+		zone.id = cp->zone;
-+		zone.dir = NF_CT_DEFAULT_ZONE_DIR;
-+
-+		thash = nf_conntrack_find_get(cp->net, &zone, &tuple);
-+		if (!thash)
-+			goto out;
-+
-+		ct = nf_ct_tuplehash_to_ctrack(thash);
-+	}
-+
-+	if (cp->mode & CTINFO_MODE_DSCP)
-+		if (!cp->dscpstatemask || (ct->mark & cp->dscpstatemask))
-+			tcf_ctinfo_dscp_set(ct, ca, cp, skb, wlen, proto);
-+
-+	if (cp->mode & CTINFO_MODE_CPMARK)
-+		tcf_ctinfo_cpmark_set(ct, ca, cp, skb);
-+
-+	if (thash)
-+		nf_ct_put(ct);
-+out:
-+	return action;
-+}
-+
-+static const struct nla_policy ctinfo_policy[TCA_CTINFO_MAX + 1] = {
-+	[TCA_CTINFO_ACT]		  = { .len = sizeof(struct
-+							    tc_ctinfo) },
-+	[TCA_CTINFO_ZONE]		  = { .type = NLA_U16 },
-+	[TCA_CTINFO_PARMS_DSCP_MASK]	  = { .type = NLA_U32 },
-+	[TCA_CTINFO_PARMS_DSCP_STATEMASK] = { .type = NLA_U32 },
-+	[TCA_CTINFO_PARMS_CPMARK_MASK]	  = { .type = NLA_U32 },
-+};
-+
-+static int tcf_ctinfo_init(struct net *net, struct nlattr *nla,
-+			   struct nlattr *est, struct tc_action **a,
-+			   int ovr, int bind, bool rtnl_held,
-+			   struct netlink_ext_ack *extack)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+	struct nlattr *tb[TCA_CTINFO_MAX + 1];
-+	struct tcf_ctinfo_params *cp_new;
-+/*	struct tcf_chain *goto_ch = NULL; */
-+	u32 dscpmask = 0, dscpstatemask;
-+	struct tc_ctinfo *actparm;
-+	struct tcf_ctinfo *ci;
-+	u8 dscpmaskshift;
-+	int ret = 0, err;
-+
-+	if (!nla)
-+		return -EINVAL;
-+
-+	err = nla_parse_nested(tb, TCA_CTINFO_MAX, nla, ctinfo_policy, NULL);
-+	if (err < 0)
-+		return err;
-+
-+	if (!tb[TCA_CTINFO_ACT])
-+		return -EINVAL;
-+	actparm = nla_data(tb[TCA_CTINFO_ACT]);
-+
-+	/* do some basic validation here before dynamically allocating things */
-+	/* that we would otherwise have to clean up.			      */
-+	if (tb[TCA_CTINFO_PARMS_DSCP_MASK]) {
-+		dscpmask = nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_MASK]);
-+		/* need contiguous 6 bit mask */
-+		dscpmaskshift = dscpmask ? __ffs(dscpmask) : 0;
-+		if ((~0 & (dscpmask >> dscpmaskshift)) != 0x3f)
-+			return -EINVAL;
-+		dscpstatemask = tb[TCA_CTINFO_PARMS_DSCP_STATEMASK] ?
-+			nla_get_u32(tb[TCA_CTINFO_PARMS_DSCP_STATEMASK]) : 0;
-+		/* mask & statemask must not overlap */
-+		if (dscpmask & dscpstatemask)
-+			return -EINVAL;
-+	}
-+
-+	/* done the validation:now to the actual action allocation */
-+	err = tcf_idr_check_alloc(tn, &actparm->index, a, bind);
-+	if (!err) {
-+		ret = tcf_idr_create(tn, actparm->index, est, a,
-+				     &act_ctinfo_ops, bind, false);
-+		if (ret) {
-+			tcf_idr_cleanup(tn, actparm->index);
-+			return ret;
-+		}
-+		ret = ACT_P_CREATED;
-+	} else if (err > 0) {
-+		if (bind) /* don't override defaults */
-+			return 0;
-+		if (!ovr) {
-+			tcf_idr_release(*a, bind);
-+			return -EEXIST;
-+		}
-+	} else {
-+		return err;
-+	}
-+
-+/*	err = tcf_action_check_ctrlact(actparm->action, tp, &goto_ch, extack);
-+	if (err < 0)
-+		goto release_idr;
-+		*/
-+
-+	ci = to_ctinfo(*a);
-+
-+	cp_new = kzalloc(sizeof(*cp_new), GFP_KERNEL);
-+	if (unlikely(!cp_new)) {
-+		err = -ENOMEM;
-+		goto put_chain;
-+	}
-+
-+	cp_new->net = net;
-+	cp_new->zone = tb[TCA_CTINFO_ZONE] ?
-+			nla_get_u16(tb[TCA_CTINFO_ZONE]) : 0;
-+	if (dscpmask) {
-+		cp_new->dscpmask = dscpmask;
-+		cp_new->dscpmaskshift = dscpmaskshift;
-+		cp_new->dscpstatemask = dscpstatemask;
-+		cp_new->mode |= CTINFO_MODE_DSCP;
-+	}
-+
-+	if (tb[TCA_CTINFO_PARMS_CPMARK_MASK]) {
-+		cp_new->cpmarkmask =
-+				nla_get_u32(tb[TCA_CTINFO_PARMS_CPMARK_MASK]);
-+		cp_new->mode |= CTINFO_MODE_CPMARK;
-+	}
-+
-+	spin_lock_bh(&ci->tcf_lock);
-+/*	goto_ch = tcf_action_set_ctrlact(*a, actparm->action, goto_ch); */
-+	ci->tcf_action = actparm->action;
-+	rcu_swap_protected(ci->params, cp_new,
-+			   lockdep_is_held(&ci->tcf_lock));
-+	spin_unlock_bh(&ci->tcf_lock);
-+
-+/*	if (goto_ch)
-+		tcf_chain_put_by_act(goto_ch); */
-+	if (cp_new)
-+		kfree_rcu(cp_new, rcu);
-+
-+	if (ret == ACT_P_CREATED)
-+		tcf_idr_insert(tn, *a);
-+
-+	return ret;
-+
-+put_chain:
-+/*	if (goto_ch)
-+		tcf_chain_put_by_act(goto_ch);
-+release_idr: */
-+	tcf_idr_release(*a, bind);
-+	return err;
-+}
-+
-+static int tcf_ctinfo_dump(struct sk_buff *skb, struct tc_action *a,
-+			   int bind, int ref)
-+{
-+	struct tcf_ctinfo *ci = to_ctinfo(a);
-+	struct tc_ctinfo opt = {
-+		.index   = ci->tcf_index,
-+		.refcnt  = refcount_read(&ci->tcf_refcnt) - ref,
-+		.bindcnt = atomic_read(&ci->tcf_bindcnt) - bind,
-+	};
-+	unsigned char *b = skb_tail_pointer(skb);
-+	struct tcf_ctinfo_params *cp;
-+	struct tcf_t t;
-+
-+	spin_lock_bh(&ci->tcf_lock);
-+	cp = rcu_dereference_protected(ci->params,
-+				       lockdep_is_held(&ci->tcf_lock));
-+
-+	tcf_tm_dump(&t, &ci->tcf_tm);
-+	if (nla_put_64bit(skb, TCA_CTINFO_TM, sizeof(t), &t, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	opt.action = ci->tcf_action;
-+	if (nla_put(skb, TCA_CTINFO_ACT, sizeof(opt), &opt))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u16(skb, TCA_CTINFO_ZONE, cp->zone))
-+		goto nla_put_failure;
-+
-+	if (cp->mode & CTINFO_MODE_DSCP) {
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_MASK,
-+				cp->dscpmask))
-+			goto nla_put_failure;
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_DSCP_STATEMASK,
-+				cp->dscpstatemask))
-+			goto nla_put_failure;
-+	}
-+
-+	if (cp->mode & CTINFO_MODE_CPMARK) {
-+		if (nla_put_u32(skb, TCA_CTINFO_PARMS_CPMARK_MASK,
-+				cp->cpmarkmask))
-+			goto nla_put_failure;
-+	}
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_SET,
-+			      ci->stats_dscp_set, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_DSCP_ERROR,
-+			      ci->stats_dscp_error, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	if (nla_put_u64_64bit(skb, TCA_CTINFO_STATS_CPMARK_SET,
-+			      ci->stats_cpmark_set, TCA_CTINFO_PAD))
-+		goto nla_put_failure;
-+
-+	spin_unlock_bh(&ci->tcf_lock);
-+	return skb->len;
-+
-+nla_put_failure:
-+	spin_unlock_bh(&ci->tcf_lock);
-+	nlmsg_trim(skb, b);
-+	return -1;
-+}
-+
-+static int tcf_ctinfo_walker(struct net *net, struct sk_buff *skb,
-+			     struct netlink_callback *cb, int type,
-+			     const struct tc_action_ops *ops,
-+			     struct netlink_ext_ack *extack)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tcf_generic_walker(tn, skb, cb, type, ops, extack);
-+}
-+
-+static int tcf_ctinfo_search(struct net *net, struct tc_action **a, u32 index,
-+			     struct netlink_ext_ack *extack)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tcf_idr_search(tn, a, index);
-+}
-+
-+static struct tc_action_ops act_ctinfo_ops = {
-+	.kind	= "ctinfo",
-+	.type	= TCA_ID_CTINFO,
-+	.owner	= THIS_MODULE,
-+	.act	= tcf_ctinfo_act,
-+	.dump	= tcf_ctinfo_dump,
-+	.init	= tcf_ctinfo_init,
-+	.walk	= tcf_ctinfo_walker,
-+	.lookup	= tcf_ctinfo_search,
-+	.size	= sizeof(struct tcf_ctinfo),
-+};
-+
-+static __net_init int ctinfo_init_net(struct net *net)
-+{
-+	struct tc_action_net *tn = net_generic(net, ctinfo_net_id);
-+
-+	return tc_action_net_init(tn, &act_ctinfo_ops);
-+}
-+
-+static void __net_exit ctinfo_exit_net(struct list_head *net_list)
-+{
-+	tc_action_net_exit(net_list, ctinfo_net_id);
-+}
-+
-+static struct pernet_operations ctinfo_net_ops = {
-+	.init		= ctinfo_init_net,
-+	.exit_batch	= ctinfo_exit_net,
-+	.id		= &ctinfo_net_id,
-+	.size		= sizeof(struct tc_action_net),
-+};
-+
-+static int __init ctinfo_init_module(void)
-+{
-+	return tcf_register_action(&act_ctinfo_ops, &ctinfo_net_ops);
-+}
-+
-+static void __exit ctinfo_cleanup_module(void)
-+{
-+	tcf_unregister_action(&act_ctinfo_ops, &ctinfo_net_ops);
-+}
-+
-+module_init(ctinfo_init_module);
-+module_exit(ctinfo_cleanup_module);
-+MODULE_AUTHOR("Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>");
-+MODULE_DESCRIPTION("Connection tracking mark actions");
-+MODULE_LICENSE("GPL");
-diff --git a/tools/testing/selftests/tc-testing/config b/tools/testing/selftests/tc-testing/config
-index 203302065458..9d1fddcfb887 100644
---- a/tools/testing/selftests/tc-testing/config
-+++ b/tools/testing/selftests/tc-testing/config
-@@ -37,6 +37,7 @@ CONFIG_NET_ACT_SKBEDIT=m
- CONFIG_NET_ACT_CSUM=m
- CONFIG_NET_ACT_VLAN=m
- CONFIG_NET_ACT_BPF=m
-+CONFIG_NET_ACT_CONNDSCP=m
- CONFIG_NET_ACT_CONNMARK=m
- CONFIG_NET_ACT_SKBMOD=m
- CONFIG_NET_ACT_IFE=m
--- 
-2.20.1 (Apple Git-117)
-