Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1073 insertions, 0 deletions

diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
new file mode 100644
index 000000000..b3b5b0b62
--- /dev/null
+++ b/include/net/pkt_cls.h
@@ -0,0 +1,1073 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_PKT_CLS_H
+#define __NET_PKT_CLS_H
+
+#include <linux/pkt_cls.h>
+#include <linux/workqueue.h>
+#include <net/sch_generic.h>
+#include <net/act_api.h>
+#include <net/net_namespace.h>
+
+/* TC action not accessible from user space */
+#define TC_ACT_CONSUMED		(TC_ACT_VALUE_MAX + 1)
+
+/* Basic packet classifier frontend definitions. */
+
+struct tcf_walker {
+	int	stop;
+	int	skip;
+	int	count;
+	bool	nonempty;
+	unsigned long cookie;
+	int	(*fn)(struct tcf_proto *, void *node, struct tcf_walker *);
+};
+
+int register_tcf_proto_ops(struct tcf_proto_ops *ops);
+void unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
+
+struct tcf_block_ext_info {
+	enum flow_block_binder_type binder_type;
+	tcf_chain_head_change_t *chain_head_change;
+	void *chain_head_change_priv;
+	u32 block_index;
+};
+
+struct tcf_qevent {
+	struct tcf_block	*block;
+	struct tcf_block_ext_info info;
+	struct tcf_proto __rcu *filter_chain;
+};
+
+struct tcf_block_cb;
+bool tcf_queue_work(struct rcu_work *rwork, work_func_t func);
+
+#ifdef CONFIG_NET_CLS
+struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block,
+				       u32 chain_index);
+void tcf_chain_put_by_act(struct tcf_chain *chain);
+struct tcf_chain *tcf_get_next_chain(struct tcf_block *block,
+				     struct tcf_chain *chain);
+struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain,
+				     struct tcf_proto *tp);
+void tcf_block_netif_keep_dst(struct tcf_block *block);
+int tcf_block_get(struct tcf_block **p_block,
+		  struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+		  struct netlink_ext_ack *extack);
+int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
+		      struct tcf_block_ext_info *ei,
+		      struct netlink_ext_ack *extack);
+void tcf_block_put(struct tcf_block *block);
+void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
+		       struct tcf_block_ext_info *ei);
+int tcf_exts_init_ex(struct tcf_exts *exts, struct net *net, int action,
+		     int police, struct tcf_proto *tp, u32 handle, bool used_action_miss);
+
+static inline bool tcf_block_shared(struct tcf_block *block)
+{
+	return block->index;
+}
+
+static inline bool tcf_block_non_null_shared(struct tcf_block *block)
+{
+	return block && block->index;
+}
+
+static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
+{
+	WARN_ON(tcf_block_shared(block));
+	return block->q;
+}
+
+int tcf_classify(struct sk_buff *skb,
+		 const struct tcf_block *block,
+		 const struct tcf_proto *tp, struct tcf_result *res,
+		 bool compat_mode);
+
+static inline bool tc_cls_stats_dump(struct tcf_proto *tp,
+				     struct tcf_walker *arg,
+				     void *filter)
+{
+	if (arg->count >= arg->skip && arg->fn(tp, filter, arg) < 0) {
+		arg->stop = 1;
+		return false;
+	}
+
+	arg->count++;
+	return true;
+}
+
+#else
+static inline bool tcf_block_shared(struct tcf_block *block)
+{
+	return false;
+}
+
+static inline bool tcf_block_non_null_shared(struct tcf_block *block)
+{
+	return false;
+}
+
+static inline
+int tcf_block_get(struct tcf_block **p_block,
+		  struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+		  struct netlink_ext_ack *extack)
+{
+	return 0;
+}
+
+static inline
+int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
+		      struct tcf_block_ext_info *ei,
+		      struct netlink_ext_ack *extack)
+{
+	return 0;
+}
+
+static inline void tcf_block_put(struct tcf_block *block)
+{
+}
+
+static inline
+void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
+		       struct tcf_block_ext_info *ei)
+{
+}
+
+static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
+{
+	return NULL;
+}
+
+static inline
+int tc_setup_cb_block_register(struct tcf_block *block, flow_setup_cb_t *cb,
+			       void *cb_priv)
+{
+	return 0;
+}
+
+static inline
+void tc_setup_cb_block_unregister(struct tcf_block *block, flow_setup_cb_t *cb,
+				  void *cb_priv)
+{
+}
+
+static inline int tcf_classify(struct sk_buff *skb,
+			       const struct tcf_block *block,
+			       const struct tcf_proto *tp,
+			       struct tcf_result *res, bool compat_mode)
+{
+	return TC_ACT_UNSPEC;
+}
+
+#endif
+
+static inline unsigned long
+__cls_set_class(unsigned long *clp, unsigned long cl)
+{
+	return xchg(clp, cl);
+}
+
+static inline void
+__tcf_bind_filter(struct Qdisc *q, struct tcf_result *r, unsigned long base)
+{
+	unsigned long cl;
+
+	cl = q->ops->cl_ops->bind_tcf(q, base, r->classid);
+	cl = __cls_set_class(&r->class, cl);
+	if (cl)
+		q->ops->cl_ops->unbind_tcf(q, cl);
+}
+
+static inline void
+tcf_bind_filter(struct tcf_proto *tp, struct tcf_result *r, unsigned long base)
+{
+	struct Qdisc *q = tp->chain->block->q;
+
+	/* Check q as it is not set for shared blocks. In that case,
+	 * setting class is not supported.
+	 */
+	if (!q)
+		return;
+	sch_tree_lock(q);
+	__tcf_bind_filter(q, r, base);
+	sch_tree_unlock(q);
+}
+
+static inline void
+__tcf_unbind_filter(struct Qdisc *q, struct tcf_result *r)
+{
+	unsigned long cl;
+
+	if ((cl = __cls_set_class(&r->class, 0)) != 0)
+		q->ops->cl_ops->unbind_tcf(q, cl);
+}
+
+static inline void
+tcf_unbind_filter(struct tcf_proto *tp, struct tcf_result *r)
+{
+	struct Qdisc *q = tp->chain->block->q;
+
+	if (!q)
+		return;
+	__tcf_unbind_filter(q, r);
+}
+
+static inline void tc_cls_bind_class(u32 classid, unsigned long cl,
+				     void *q, struct tcf_result *res,
+				     unsigned long base)
+{
+	if (res->classid == classid) {
+		if (cl)
+			__tcf_bind_filter(q, res, base);
+		else
+			__tcf_unbind_filter(q, res);
+	}
+}
+
+struct tcf_exts {
+#ifdef CONFIG_NET_CLS_ACT
+	__u32	type; /* for backward compat(TCA_OLD_COMPAT) */
+	int nr_actions;
+	struct tc_action **actions;
+	struct net	*net;
+	netns_tracker	ns_tracker;
+	struct tcf_exts_miss_cookie_node *miss_cookie_node;
+#endif
+	/* Map to export classifier specific extension TLV types to the
+	 * generic extensions API. Unsupported extensions must be set to 0.
+	 */
+	int action;
+	int police;
+};
+
+static inline int tcf_exts_init(struct tcf_exts *exts, struct net *net,
+				int action, int police)
+{
+#ifdef CONFIG_NET_CLS
+	return tcf_exts_init_ex(exts, net, action, police, NULL, 0, false);
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+/* Return false if the netns is being destroyed in cleanup_net(). Callers
+ * need to do cleanup synchronously in this case, otherwise may race with
+ * tc_action_net_exit(). Return true for other cases.
+ */
+static inline bool tcf_exts_get_net(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	exts->net = maybe_get_net(exts->net);
+	if (exts->net)
+		netns_tracker_alloc(exts->net, &exts->ns_tracker, GFP_KERNEL);
+	return exts->net != NULL;
+#else
+	return true;
+#endif
+}
+
+static inline void tcf_exts_put_net(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	if (exts->net)
+		put_net_track(exts->net, &exts->ns_tracker);
+#endif
+}
+
+#ifdef CONFIG_NET_CLS_ACT
+#define tcf_exts_for_each_action(i, a, exts) \
+	for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = (exts)->actions[i]); i++)
+#else
+#define tcf_exts_for_each_action(i, a, exts) \
+	for (; 0; (void)(i), (void)(a), (void)(exts))
+#endif
+
+#define tcf_act_for_each_action(i, a, actions) \
+	for (i = 0; i < TCA_ACT_MAX_PRIO && ((a) = actions[i]); i++)
+
+static inline bool tc_act_in_hw(struct tc_action *act)
+{
+	return !!act->in_hw_count;
+}
+
+static inline void
+tcf_exts_hw_stats_update(const struct tcf_exts *exts,
+			 struct flow_stats *stats,
+			 bool use_act_stats)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	int i;
+
+	for (i = 0; i < exts->nr_actions; i++) {
+		struct tc_action *a = exts->actions[i];
+
+		if (use_act_stats || tc_act_in_hw(a)) {
+			if (!tcf_action_update_hw_stats(a))
+				continue;
+		}
+
+		preempt_disable();
+		tcf_action_stats_update(a, stats->bytes, stats->pkts, stats->drops,
+					stats->lastused, true);
+		preempt_enable();
+
+		a->used_hw_stats = stats->used_hw_stats;
+		a->used_hw_stats_valid = stats->used_hw_stats_valid;
+	}
+#endif
+}
+
+/**
+ * tcf_exts_has_actions - check if at least one action is present
+ * @exts: tc filter extensions handle
+ *
+ * Returns true if at least one action is present.
+ */
+static inline bool tcf_exts_has_actions(struct tcf_exts *exts)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	return exts->nr_actions;
+#else
+	return false;
+#endif
+}
+
+/**
+ * tcf_exts_exec - execute tc filter extensions
+ * @skb: socket buffer
+ * @exts: tc filter extensions handle
+ * @res: desired result
+ *
+ * Executes all configured extensions. Returns TC_ACT_OK on a normal execution,
+ * a negative number if the filter must be considered unmatched or
+ * a positive action code (TC_ACT_*) which must be returned to the
+ * underlying layer.
+ */
+static inline int
+tcf_exts_exec(struct sk_buff *skb, struct tcf_exts *exts,
+	      struct tcf_result *res)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	return tcf_action_exec(skb, exts->actions, exts->nr_actions, res);
+#endif
+	return TC_ACT_OK;
+}
+
+static inline int
+tcf_exts_exec_ex(struct sk_buff *skb, struct tcf_exts *exts, int act_index,
+		 struct tcf_result *res)
+{
+#ifdef CONFIG_NET_CLS_ACT
+	return tcf_action_exec(skb, exts->actions + act_index,
+			       exts->nr_actions - act_index, res);
+#else
+	return TC_ACT_OK;
+#endif
+}
+
+int tcf_exts_validate(struct net *net, struct tcf_proto *tp,
+		      struct nlattr **tb, struct nlattr *rate_tlv,
+		      struct tcf_exts *exts, u32 flags,
+		      struct netlink_ext_ack *extack);
+int tcf_exts_validate_ex(struct net *net, struct tcf_proto *tp, struct nlattr **tb,
+			 struct nlattr *rate_tlv, struct tcf_exts *exts,
+			 u32 flags, u32 fl_flags, struct netlink_ext_ack *extack);
+void tcf_exts_destroy(struct tcf_exts *exts);
+void tcf_exts_change(struct tcf_exts *dst, struct tcf_exts *src);
+int tcf_exts_dump(struct sk_buff *skb, struct tcf_exts *exts);
+int tcf_exts_terse_dump(struct sk_buff *skb, struct tcf_exts *exts);
+int tcf_exts_dump_stats(struct sk_buff *skb, struct tcf_exts *exts);
+
+/**
+ * struct tcf_pkt_info - packet information
+ *
+ * @ptr: start of the pkt data
+ * @nexthdr: offset of the next header
+ */
+struct tcf_pkt_info {
+	unsigned char *		ptr;
+	int			nexthdr;
+};
+
+#ifdef CONFIG_NET_EMATCH
+
+struct tcf_ematch_ops;
+
+/**
+ * struct tcf_ematch - extended match (ematch)
+ * 
+ * @matchid: identifier to allow userspace to reidentify a match
+ * @flags: flags specifying attributes and the relation to other matches
+ * @ops: the operations lookup table of the corresponding ematch module
+ * @datalen: length of the ematch specific configuration data
+ * @data: ematch specific data
+ * @net: the network namespace
+ */
+struct tcf_ematch {
+	struct tcf_ematch_ops * ops;
+	unsigned long		data;
+	unsigned int		datalen;
+	u16			matchid;
+	u16			flags;
+	struct net		*net;
+};
+
+static inline int tcf_em_is_container(struct tcf_ematch *em)
+{
+	return !em->ops;
+}
+
+static inline int tcf_em_is_simple(struct tcf_ematch *em)
+{
+	return em->flags & TCF_EM_SIMPLE;
+}
+
+static inline int tcf_em_is_inverted(struct tcf_ematch *em)
+{
+	return em->flags & TCF_EM_INVERT;
+}
+
+static inline int tcf_em_last_match(struct tcf_ematch *em)
+{
+	return (em->flags & TCF_EM_REL_MASK) == TCF_EM_REL_END;
+}
+
+static inline int tcf_em_early_end(struct tcf_ematch *em, int result)
+{
+	if (tcf_em_last_match(em))
+		return 1;
+
+	if (result == 0 && em->flags & TCF_EM_REL_AND)
+		return 1;
+
+	if (result != 0 && em->flags & TCF_EM_REL_OR)
+		return 1;
+
+	return 0;
+}
+	
+/**
+ * struct tcf_ematch_tree - ematch tree handle
+ *
+ * @hdr: ematch tree header supplied by userspace
+ * @matches: array of ematches
+ */
+struct tcf_ematch_tree {
+	struct tcf_ematch_tree_hdr hdr;
+	struct tcf_ematch *	matches;
+	
+};
+
+/**
+ * struct tcf_ematch_ops - ematch module operations
+ * 
+ * @kind: identifier (kind) of this ematch module
+ * @datalen: length of expected configuration data (optional)
+ * @change: called during validation (optional)
+ * @match: called during ematch tree evaluation, must return 1/0
+ * @destroy: called during destroyage (optional)
+ * @dump: called during dumping process (optional)
+ * @owner: owner, must be set to THIS_MODULE
+ * @link: link to previous/next ematch module (internal use)
+ */
+struct tcf_ematch_ops {
+	int			kind;
+	int			datalen;
+	int			(*change)(struct net *net, void *,
+					  int, struct tcf_ematch *);
+	int			(*match)(struct sk_buff *, struct tcf_ematch *,
+					 struct tcf_pkt_info *);
+	void			(*destroy)(struct tcf_ematch *);
+	int			(*dump)(struct sk_buff *, struct tcf_ematch *);
+	struct module		*owner;
+	struct list_head	link;
+};
+
+int tcf_em_register(struct tcf_ematch_ops *);
+void tcf_em_unregister(struct tcf_ematch_ops *);
+int tcf_em_tree_validate(struct tcf_proto *, struct nlattr *,
+			 struct tcf_ematch_tree *);
+void tcf_em_tree_destroy(struct tcf_ematch_tree *);
+int tcf_em_tree_dump(struct sk_buff *, struct tcf_ematch_tree *, int);
+int __tcf_em_tree_match(struct sk_buff *, struct tcf_ematch_tree *,
+			struct tcf_pkt_info *);
+
+/**
+ * tcf_em_tree_match - evaulate an ematch tree
+ *
+ * @skb: socket buffer of the packet in question
+ * @tree: ematch tree to be used for evaluation
+ * @info: packet information examined by classifier
+ *
+ * This function matches @skb against the ematch tree in @tree by going
+ * through all ematches respecting their logic relations returning
+ * as soon as the result is obvious.
+ *
+ * Returns 1 if the ematch tree as-one matches, no ematches are configured
+ * or ematch is not enabled in the kernel, otherwise 0 is returned.
+ */
+static inline int tcf_em_tree_match(struct sk_buff *skb,
+				    struct tcf_ematch_tree *tree,
+				    struct tcf_pkt_info *info)
+{
+	if (tree->hdr.nmatches)
+		return __tcf_em_tree_match(skb, tree, info);
+	else
+		return 1;
+}
+
+#define MODULE_ALIAS_TCF_EMATCH(kind)	MODULE_ALIAS("ematch-kind-" __stringify(kind))
+
+#else /* CONFIG_NET_EMATCH */
+
+struct tcf_ematch_tree {
+};
+
+#define tcf_em_tree_validate(tp, tb, t) ((void)(t), 0)
+#define tcf_em_tree_destroy(t) do { (void)(t); } while(0)
+#define tcf_em_tree_dump(skb, t, tlv) (0)
+#define tcf_em_tree_match(skb, t, info) ((void)(info), 1)
+
+#endif /* CONFIG_NET_EMATCH */
+
+static inline unsigned char * tcf_get_base_ptr(struct sk_buff *skb, int layer)
+{
+	switch (layer) {
+		case TCF_LAYER_LINK:
+			return skb_mac_header(skb);
+		case TCF_LAYER_NETWORK:
+			return skb_network_header(skb);
+		case TCF_LAYER_TRANSPORT:
+			return skb_transport_header(skb);
+	}
+
+	return NULL;
+}
+
+static inline int tcf_valid_offset(const struct sk_buff *skb,
+				   const unsigned char *ptr, const int len)
+{
+	return likely((ptr + len) <= skb_tail_pointer(skb) &&
+		      ptr >= skb->head &&
+		      (ptr <= (ptr + len)));
+}
+
+static inline int
+tcf_change_indev(struct net *net, struct nlattr *indev_tlv,
+		 struct netlink_ext_ack *extack)
+{
+	char indev[IFNAMSIZ];
+	struct net_device *dev;
+
+	if (nla_strscpy(indev, indev_tlv, IFNAMSIZ) < 0) {
+		NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
+				    "Interface name too long");
+		return -EINVAL;
+	}
+	dev = __dev_get_by_name(net, indev);
+	if (!dev) {
+		NL_SET_ERR_MSG_ATTR(extack, indev_tlv,
+				    "Network device not found");
+		return -ENODEV;
+	}
+	return dev->ifindex;
+}
+
+static inline bool
+tcf_match_indev(struct sk_buff *skb, int ifindex)
+{
+	if (!ifindex)
+		return true;
+	if  (!skb->skb_iif)
+		return false;
+	return ifindex == skb->skb_iif;
+}
+
+int tc_setup_offload_action(struct flow_action *flow_action,
+			    const struct tcf_exts *exts,
+			    struct netlink_ext_ack *extack);
+void tc_cleanup_offload_action(struct flow_action *flow_action);
+int tc_setup_action(struct flow_action *flow_action,
+		    struct tc_action *actions[],
+		    u32 miss_cookie_base,
+		    struct netlink_ext_ack *extack);
+
+int tc_setup_cb_call(struct tcf_block *block, enum tc_setup_type type,
+		     void *type_data, bool err_stop, bool rtnl_held);
+int tc_setup_cb_add(struct tcf_block *block, struct tcf_proto *tp,
+		    enum tc_setup_type type, void *type_data, bool err_stop,
+		    u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
+int tc_setup_cb_replace(struct tcf_block *block, struct tcf_proto *tp,
+			enum tc_setup_type type, void *type_data, bool err_stop,
+			u32 *old_flags, unsigned int *old_in_hw_count,
+			u32 *new_flags, unsigned int *new_in_hw_count,
+			bool rtnl_held);
+int tc_setup_cb_destroy(struct tcf_block *block, struct tcf_proto *tp,
+			enum tc_setup_type type, void *type_data, bool err_stop,
+			u32 *flags, unsigned int *in_hw_count, bool rtnl_held);
+int tc_setup_cb_reoffload(struct tcf_block *block, struct tcf_proto *tp,
+			  bool add, flow_setup_cb_t *cb,
+			  enum tc_setup_type type, void *type_data,
+			  void *cb_priv, u32 *flags, unsigned int *in_hw_count);
+unsigned int tcf_exts_num_actions(struct tcf_exts *exts);
+
+#ifdef CONFIG_NET_CLS_ACT
+int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
+		    enum flow_block_binder_type binder_type,
+		    struct nlattr *block_index_attr,
+		    struct netlink_ext_ack *extack);
+void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch);
+int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
+			       struct netlink_ext_ack *extack);
+struct sk_buff *tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
+				  struct sk_buff **to_free, int *ret);
+int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe);
+#else
+static inline int tcf_qevent_init(struct tcf_qevent *qe, struct Qdisc *sch,
+				  enum flow_block_binder_type binder_type,
+				  struct nlattr *block_index_attr,
+				  struct netlink_ext_ack *extack)
+{
+	return 0;
+}
+
+static inline void tcf_qevent_destroy(struct tcf_qevent *qe, struct Qdisc *sch)
+{
+}
+
+static inline int tcf_qevent_validate_change(struct tcf_qevent *qe, struct nlattr *block_index_attr,
+					     struct netlink_ext_ack *extack)
+{
+	return 0;
+}
+
+static inline struct sk_buff *
+tcf_qevent_handle(struct tcf_qevent *qe, struct Qdisc *sch, struct sk_buff *skb,
+		  struct sk_buff **to_free, int *ret)
+{
+	return skb;
+}
+
+static inline int tcf_qevent_dump(struct sk_buff *skb, int attr_name, struct tcf_qevent *qe)
+{
+	return 0;
+}
+#endif
+
+struct tc_cls_u32_knode {
+	struct tcf_exts *exts;
+	struct tcf_result *res;
+	struct tc_u32_sel *sel;
+	u32 handle;
+	u32 val;
+	u32 mask;
+	u32 link_handle;
+	u8 fshift;
+};
+
+struct tc_cls_u32_hnode {
+	u32 handle;
+	u32 prio;
+	unsigned int divisor;
+};
+
+enum tc_clsu32_command {
+	TC_CLSU32_NEW_KNODE,
+	TC_CLSU32_REPLACE_KNODE,
+	TC_CLSU32_DELETE_KNODE,
+	TC_CLSU32_NEW_HNODE,
+	TC_CLSU32_REPLACE_HNODE,
+	TC_CLSU32_DELETE_HNODE,
+};
+
+struct tc_cls_u32_offload {
+	struct flow_cls_common_offload common;
+	/* knode values */
+	enum tc_clsu32_command command;
+	union {
+		struct tc_cls_u32_knode knode;
+		struct tc_cls_u32_hnode hnode;
+	};
+};
+
+static inline bool tc_can_offload(const struct net_device *dev)
+{
+	return dev->features & NETIF_F_HW_TC;
+}
+
+static inline bool tc_can_offload_extack(const struct net_device *dev,
+					 struct netlink_ext_ack *extack)
+{
+	bool can = tc_can_offload(dev);
+
+	if (!can)
+		NL_SET_ERR_MSG(extack, "TC offload is disabled on net device");
+
+	return can;
+}
+
+static inline bool
+tc_cls_can_offload_and_chain0(const struct net_device *dev,
+			      struct flow_cls_common_offload *common)
+{
+	if (!tc_can_offload_extack(dev, common->extack))
+		return false;
+	if (common->chain_index) {
+		NL_SET_ERR_MSG(common->extack,
+			       "Driver supports only offload of chain 0");
+		return false;
+	}
+	return true;
+}
+
+static inline bool tc_skip_hw(u32 flags)
+{
+	return (flags & TCA_CLS_FLAGS_SKIP_HW) ? true : false;
+}
+
+static inline bool tc_skip_sw(u32 flags)
+{
+	return (flags & TCA_CLS_FLAGS_SKIP_SW) ? true : false;
+}
+
+/* SKIP_HW and SKIP_SW are mutually exclusive flags. */
+static inline bool tc_flags_valid(u32 flags)
+{
+	if (flags & ~(TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW |
+		      TCA_CLS_FLAGS_VERBOSE))
+		return false;
+
+	flags &= TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW;
+	if (!(flags ^ (TCA_CLS_FLAGS_SKIP_HW | TCA_CLS_FLAGS_SKIP_SW)))
+		return false;
+
+	return true;
+}
+
+static inline bool tc_in_hw(u32 flags)
+{
+	return (flags & TCA_CLS_FLAGS_IN_HW) ? true : false;
+}
+
+static inline void
+tc_cls_common_offload_init(struct flow_cls_common_offload *cls_common,
+			   const struct tcf_proto *tp, u32 flags,
+			   struct netlink_ext_ack *extack)
+{
+	cls_common->chain_index = tp->chain->index;
+	cls_common->protocol = tp->protocol;
+	cls_common->prio = tp->prio >> 16;
+	if (tc_skip_sw(flags) || flags & TCA_CLS_FLAGS_VERBOSE)
+		cls_common->extack = extack;
+}
+
+#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
+static inline struct tc_skb_ext *tc_skb_ext_alloc(struct sk_buff *skb)
+{
+	struct tc_skb_ext *tc_skb_ext = skb_ext_add(skb, TC_SKB_EXT);
+
+	if (tc_skb_ext)
+		memset(tc_skb_ext, 0, sizeof(*tc_skb_ext));
+	return tc_skb_ext;
+}
+#endif
+
+enum tc_matchall_command {
+	TC_CLSMATCHALL_REPLACE,
+	TC_CLSMATCHALL_DESTROY,
+	TC_CLSMATCHALL_STATS,
+};
+
+struct tc_cls_matchall_offload {
+	struct flow_cls_common_offload common;
+	enum tc_matchall_command command;
+	struct flow_rule *rule;
+	struct flow_stats stats;
+	bool use_act_stats;
+	unsigned long cookie;
+};
+
+enum tc_clsbpf_command {
+	TC_CLSBPF_OFFLOAD,
+	TC_CLSBPF_STATS,
+};
+
+struct tc_cls_bpf_offload {
+	struct flow_cls_common_offload common;
+	enum tc_clsbpf_command command;
+	struct tcf_exts *exts;
+	struct bpf_prog *prog;
+	struct bpf_prog *oldprog;
+	const char *name;
+	bool exts_integrated;
+};
+
+/* This structure holds cookie structure that is passed from user
+ * to the kernel for actions and classifiers
+ */
+struct tc_cookie {
+	u8  *data;
+	u32 len;
+	struct rcu_head rcu;
+};
+
+struct tc_qopt_offload_stats {
+	struct gnet_stats_basic_sync *bstats;
+	struct gnet_stats_queue *qstats;
+};
+
+enum tc_mq_command {
+	TC_MQ_CREATE,
+	TC_MQ_DESTROY,
+	TC_MQ_STATS,
+	TC_MQ_GRAFT,
+};
+
+struct tc_mq_opt_offload_graft_params {
+	unsigned long queue;
+	u32 child_handle;
+};
+
+struct tc_mq_qopt_offload {
+	enum tc_mq_command command;
+	u32 handle;
+	union {
+		struct tc_qopt_offload_stats stats;
+		struct tc_mq_opt_offload_graft_params graft_params;
+	};
+};
+
+enum tc_htb_command {
+	/* Root */
+	TC_HTB_CREATE, /* Initialize HTB offload. */
+	TC_HTB_DESTROY, /* Destroy HTB offload. */
+
+	/* Classes */
+	/* Allocate qid and create leaf. */
+	TC_HTB_LEAF_ALLOC_QUEUE,
+	/* Convert leaf to inner, preserve and return qid, create new leaf. */
+	TC_HTB_LEAF_TO_INNER,
+	/* Delete leaf, while siblings remain. */
+	TC_HTB_LEAF_DEL,
+	/* Delete leaf, convert parent to leaf, preserving qid. */
+	TC_HTB_LEAF_DEL_LAST,
+	/* TC_HTB_LEAF_DEL_LAST, but delete driver data on hardware errors. */
+	TC_HTB_LEAF_DEL_LAST_FORCE,
+	/* Modify parameters of a node. */
+	TC_HTB_NODE_MODIFY,
+
+	/* Class qdisc */
+	TC_HTB_LEAF_QUERY_QUEUE, /* Query qid by classid. */
+};
+
+struct tc_htb_qopt_offload {
+	struct netlink_ext_ack *extack;
+	enum tc_htb_command command;
+	u32 parent_classid;
+	u16 classid;
+	u16 qid;
+	u64 rate;
+	u64 ceil;
+};
+
+#define TC_HTB_CLASSID_ROOT U32_MAX
+
+enum tc_red_command {
+	TC_RED_REPLACE,
+	TC_RED_DESTROY,
+	TC_RED_STATS,
+	TC_RED_XSTATS,
+	TC_RED_GRAFT,
+};
+
+struct tc_red_qopt_offload_params {
+	u32 min;
+	u32 max;
+	u32 probability;
+	u32 limit;
+	bool is_ecn;
+	bool is_harddrop;
+	bool is_nodrop;
+	struct gnet_stats_queue *qstats;
+};
+
+struct tc_red_qopt_offload {
+	enum tc_red_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_red_qopt_offload_params set;
+		struct tc_qopt_offload_stats stats;
+		struct red_stats *xstats;
+		u32 child_handle;
+	};
+};
+
+enum tc_gred_command {
+	TC_GRED_REPLACE,
+	TC_GRED_DESTROY,
+	TC_GRED_STATS,
+};
+
+struct tc_gred_vq_qopt_offload_params {
+	bool present;
+	u32 limit;
+	u32 prio;
+	u32 min;
+	u32 max;
+	bool is_ecn;
+	bool is_harddrop;
+	u32 probability;
+	/* Only need backlog, see struct tc_prio_qopt_offload_params */
+	u32 *backlog;
+};
+
+struct tc_gred_qopt_offload_params {
+	bool grio_on;
+	bool wred_on;
+	unsigned int dp_cnt;
+	unsigned int dp_def;
+	struct gnet_stats_queue *qstats;
+	struct tc_gred_vq_qopt_offload_params tab[MAX_DPs];
+};
+
+struct tc_gred_qopt_offload_stats {
+	struct gnet_stats_basic_sync bstats[MAX_DPs];
+	struct gnet_stats_queue qstats[MAX_DPs];
+	struct red_stats *xstats[MAX_DPs];
+};
+
+struct tc_gred_qopt_offload {
+	enum tc_gred_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_gred_qopt_offload_params set;
+		struct tc_gred_qopt_offload_stats stats;
+	};
+};
+
+enum tc_prio_command {
+	TC_PRIO_REPLACE,
+	TC_PRIO_DESTROY,
+	TC_PRIO_STATS,
+	TC_PRIO_GRAFT,
+};
+
+struct tc_prio_qopt_offload_params {
+	int bands;
+	u8 priomap[TC_PRIO_MAX + 1];
+	/* At the point of un-offloading the Qdisc, the reported backlog and
+	 * qlen need to be reduced by the portion that is in HW.
+	 */
+	struct gnet_stats_queue *qstats;
+};
+
+struct tc_prio_qopt_offload_graft_params {
+	u8 band;
+	u32 child_handle;
+};
+
+struct tc_prio_qopt_offload {
+	enum tc_prio_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_prio_qopt_offload_params replace_params;
+		struct tc_qopt_offload_stats stats;
+		struct tc_prio_qopt_offload_graft_params graft_params;
+	};
+};
+
+enum tc_root_command {
+	TC_ROOT_GRAFT,
+};
+
+struct tc_root_qopt_offload {
+	enum tc_root_command command;
+	u32 handle;
+	bool ingress;
+};
+
+enum tc_ets_command {
+	TC_ETS_REPLACE,
+	TC_ETS_DESTROY,
+	TC_ETS_STATS,
+	TC_ETS_GRAFT,
+};
+
+struct tc_ets_qopt_offload_replace_params {
+	unsigned int bands;
+	u8 priomap[TC_PRIO_MAX + 1];
+	unsigned int quanta[TCQ_ETS_MAX_BANDS];	/* 0 for strict bands. */
+	unsigned int weights[TCQ_ETS_MAX_BANDS];
+	struct gnet_stats_queue *qstats;
+};
+
+struct tc_ets_qopt_offload_graft_params {
+	u8 band;
+	u32 child_handle;
+};
+
+struct tc_ets_qopt_offload {
+	enum tc_ets_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_ets_qopt_offload_replace_params replace_params;
+		struct tc_qopt_offload_stats stats;
+		struct tc_ets_qopt_offload_graft_params graft_params;
+	};
+};
+
+enum tc_tbf_command {
+	TC_TBF_REPLACE,
+	TC_TBF_DESTROY,
+	TC_TBF_STATS,
+	TC_TBF_GRAFT,
+};
+
+struct tc_tbf_qopt_offload_replace_params {
+	struct psched_ratecfg rate;
+	u32 max_size;
+	struct gnet_stats_queue *qstats;
+};
+
+struct tc_tbf_qopt_offload {
+	enum tc_tbf_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_tbf_qopt_offload_replace_params replace_params;
+		struct tc_qopt_offload_stats stats;
+		u32 child_handle;
+	};
+};
+
+enum tc_fifo_command {
+	TC_FIFO_REPLACE,
+	TC_FIFO_DESTROY,
+	TC_FIFO_STATS,
+};
+
+struct tc_fifo_qopt_offload {
+	enum tc_fifo_command command;
+	u32 handle;
+	u32 parent;
+	union {
+		struct tc_qopt_offload_stats stats;
+	};
+};
+
+#ifdef CONFIG_NET_CLS_ACT
+DECLARE_STATIC_KEY_FALSE(tc_skb_ext_tc);
+void tc_skb_ext_tc_enable(void);
+void tc_skb_ext_tc_disable(void);
+#define tc_skb_ext_tc_enabled() static_branch_unlikely(&tc_skb_ext_tc)
+#else /* CONFIG_NET_CLS_ACT */
+static inline void tc_skb_ext_tc_enable(void) { }
+static inline void tc_skb_ext_tc_disable(void) { }
+#define tc_skb_ext_tc_enabled() false
+#endif
+
+#endif