sfe.h - codeaurora/qca-nss-sfe - Gitiles

 /*
  * sfe.h
  *	Shortcut forwarding engine.
  *
  * Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
  * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
  * copyright notice and this permission notice appear in all copies.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */

 #ifndef __SFE_H
 #define __SFE_H

 /*
  * Maximum number of accelerated IPv4 or IPv6 connections
  */
 #if defined(SFE_MEM_PROFILE_LOW)
 #define SFE_MAX_CONNECTION_NUM 512
 #elif defined(SFE_MEM_PROFILE_MEDIUM)
 #define SFE_MAX_CONNECTION_NUM 2048
 #else
 #define SFE_MAX_CONNECTION_NUM 4096
 #endif

 #define SFE_L2_PARSE_FLAGS_PPPOE_INGRESS 0x01	/* Indicates presence of a valid PPPoE header */

 /**
  * SAWF_metadata information placement in mark field.
  */
 #define SFE_SAWF_VALID_TAG 0xAA
 #define SFE_SAWF_TAG_SHIFT 0x18
 #define SFE_SAWF_SERVICE_CLASS_SHIFT 0x10
 #define SFE_SAWF_SERVICE_CLASS_MASK 0xff
 #define SFE_SAWF_MSDUQ_MASK 0xffff

 /**
  * SAWF_metadata extraction.
  */
 #define SFE_GET_SAWF_TAG(x) (x>>SFE_SAWF_TAG_SHIFT)
 #define SFE_GET_SAWF_SERVICE_CLASS(x) ((x>>SFE_SAWF_SERVICE_CLASS_SHIFT) & SFE_SAWF_SERVICE_CLASS_MASK)
 #define SFE_GET_SAWF_MSDUQ(x) (x & SFE_SAWF_MSDUQ_MASK)
 #define SFE_SAWF_TAG_IS_VALID(x) ((x == SFE_SAWF_VALID_TAG) ? true : false)

 /*
  * IPv6 address structure
  */
 struct sfe_ipv6_addr {
 	__be32 addr[4];
 };

 typedef union {
 	__be32			ip;
 	struct sfe_ipv6_addr	ip6[1];
 } sfe_ip_addr_t;

 typedef enum sfe_sync_reason {
 	SFE_SYNC_REASON_STATS,	/* Sync is to synchronize stats */
 	SFE_SYNC_REASON_FLUSH,	/* Sync is to flush a entry */
 	SFE_SYNC_REASON_DESTROY	/* Sync is to destroy a entry(requested by connection manager) */
 } sfe_sync_reason_t;

 /*
  * VLAN header (aka VLAN tag)
  */
 struct sfe_vlan_hdr {
 	u16 tpid;               /* Tag Protocol Identifier */
 	u16 tci;                /* Tag Control Information */
 };

 /*
  * Structure used to store L2 information
  */
 struct sfe_l2_info {
 	u16 parse_flags;	/* Flags indicating L2.5 headers presence */
 	u16 pppoe_session_id;	/* PPPOE header offset */
 	u16 protocol;		/* L3 Protocol */
 	struct sfe_vlan_hdr vlan_hdr[SFE_MAX_VLAN_DEPTH];
 				/* VLAN tag(s) of ingress packet */
 	u8 vlan_hdr_cnt;        /* Number of VLAN tags in the ingress packet */
 };

 /*
  * Structure used to sync connection stats/state back within the system.
  *
  * NOTE: The addresses here are NON-NAT addresses, i.e. the true endpoint addressing.
  * 'src' is the creator of the connection.
  */
 struct sfe_connection_sync {
 	struct net_device *src_dev;
 	struct net_device *dest_dev;
 	int is_v6;			/* Is it for ipv6? */
 	int protocol;			/* IP protocol number (IPPROTO_...) */
 	sfe_ip_addr_t src_ip;		/* Non-NAT source address, i.e. the creator of the connection */
 	sfe_ip_addr_t src_ip_xlate;	/* NATed source address */
 	__be16 src_port;		/* Non-NAT source port */
 	__be16 src_port_xlate;		/* NATed source port */
 	sfe_ip_addr_t dest_ip;		/* Non-NAT destination address, i.e. to whom the connection was created */
 	sfe_ip_addr_t dest_ip_xlate;	/* NATed destination address */
 	__be16 dest_port;		/* Non-NAT destination port */
 	__be16 dest_port_xlate;		/* NATed destination port */
 	u32 src_td_max_window;
 	u32 src_td_end;
 	u32 src_td_max_end;
 	u64 src_packet_count;
 	u64 src_byte_count;
 	u32 src_new_packet_count;
 	u32 src_new_byte_count;
 	u32 dest_td_max_window;
 	u32 dest_td_end;
 	u32 dest_td_max_end;
 	u64 dest_packet_count;
 	u64 dest_byte_count;
 	u32 dest_new_packet_count;
 	u32 dest_new_byte_count;
 	u32 reason;                     /* reason for stats sync message, i.e. destroy, flush, period sync */
 	u64 delta_jiffies;		/* Time to be added to the current timeout to keep the connection alive */
 };

 /*
  * Expose the hook for the receive processing.
  */
 extern int (*athrs_fast_nat_recv)(struct sk_buff *skb);

 /*
  * Expose what should be a static flag in the TCP connection tracker.
  */
 extern int nf_ct_tcp_no_window_check;

 /*
  * Check the fast transmit feasibility.
  */
 bool sfe_fast_xmit_check(struct sk_buff *skb, netdev_features_t features);

 /*
  * This callback will be called in a timer
  * at 100 times per second to sync stats back to
  * Linux connection track.
  *
  * A RCU lock is taken to prevent this callback
  * from unregistering.
  */
 typedef void (*sfe_sync_rule_callback_t)(struct sfe_connection_sync *);
 typedef void (*sfe_ipv4_many_sync_callback_t)(struct sfe_ipv4_msg *msg);
 typedef void (*sfe_ipv6_many_sync_callback_t)(struct sfe_ipv6_msg *msg);

 /*
  * IPv4 APIs used by connection manager
  */
 int sfe_ipv4_recv(struct net_device *dev, struct sk_buff *skb, struct sfe_l2_info *l2_info, bool tun_outer);
 int sfe_ipv4_create_rule(struct sfe_ipv4_rule_create_msg *msg);
 void sfe_ipv4_destroy_rule(struct sfe_ipv4_rule_destroy_msg *msg);
 void sfe_ipv4_destroy_all_rules_for_dev(struct net_device *dev);
 void sfe_ipv4_register_sync_rule_callback(sfe_sync_rule_callback_t callback);
 void sfe_ipv4_update_rule(struct sfe_ipv4_rule_create_msg *msg);
 bool sfe_dev_has_hw_csum(struct net_device *dev);

 bool sfe_ipv4_sync_invoke(uint16_t index);
 void sfe_ipv4_register_many_sync_callback(sfe_ipv4_many_sync_callback_t cb);
 void sfe_ipv4_stats_convert(struct sfe_ipv4_conn_sync *sync_msg, struct sfe_connection_sync *sis);
 #ifdef SFE_SUPPORT_IPV6
 /*
  * IPv6 APIs used by connection manager
  */
 int sfe_ipv6_recv(struct net_device *dev, struct sk_buff *skb, struct sfe_l2_info *l2_info, bool tun_outer);
 int sfe_ipv6_create_rule(struct sfe_ipv6_rule_create_msg *msg);
 void sfe_ipv6_destroy_rule(struct sfe_ipv6_rule_destroy_msg *msg);
 void sfe_ipv6_destroy_all_rules_for_dev(struct net_device *dev);
 void sfe_ipv6_register_sync_rule_callback(sfe_sync_rule_callback_t callback);
 void sfe_ipv6_update_rule(struct sfe_ipv6_rule_create_msg *msg);
 bool sfe_ipv6_sync_invoke(uint16_t index);
 void sfe_ipv6_register_many_sync_callback(sfe_ipv6_many_sync_callback_t cb);
 void sfe_ipv6_stats_convert(struct sfe_ipv6_conn_sync *sync_msg, struct sfe_connection_sync *sis);
 #else
 static inline int sfe_ipv6_recv(struct net_device *dev, struct sk_buff *skb, struct sfe_l2_info *l2_info, bool tun_outer)
 {
 	return 0;
 }

 static inline int sfe_ipv6_create_rule(struct sfe_ipv6_rule_create_msg *msg)
 {
 	return 0;
 }

 static inline void sfe_ipv6_destroy_rule(struct sfe_ipv6_rule_destroy_msg *msg)
 {
 	return;
 }

 static inline void sfe_ipv6_destroy_all_rules_for_dev(struct net_device *dev)
 {
 	return;
 }

 static inline void sfe_ipv6_register_sync_rule_callback(sfe_sync_rule_callback_t callback)
 {
 	return;
 }

 static inline void sfe_ipv6_update_rule(struct sfe_ipv6_rule_create_msg *msg)
 {
 	return;
 }

 static inline bool sfe_ipv6_sync_invoke(uint16_t index)
 {
 	return false;
 }

 static inline void sfe_ipv6_register_many_sync_callback(sfe_ipv6_many_sync_callback_t cb)
 {
 	return;
 }

 static inline void sfe_ipv6_stats_convert(struct sfe_ipv6_conn_sync *sync_msg, struct sfe_connection_sync *sis)
 {
 	return;
 }
 #endif

 /*
  * sfe_ipv6_addr_equal()
  *	compare ipv6 address
  *
  * return: 1, equal; 0, no equal
  */
 static inline int sfe_ipv6_addr_equal(struct sfe_ipv6_addr *a,
 				      struct sfe_ipv6_addr *b)
 {
 	return a->addr[0] == b->addr[0] &&
 	       a->addr[1] == b->addr[1] &&
 	       a->addr[2] == b->addr[2] &&
 	       a->addr[3] == b->addr[3];
 }

 /*
  * sfe_ipv4_addr_equal()
  *	compare ipv4 address
  *
  * return: 1, equal; 0, no equal
  */
 #define sfe_ipv4_addr_equal(a, b) ((u32)(a) == (u32)(b))

 /*
  * sfe_addr_equal()
  *	compare ipv4 or ipv6 address
  *
  * return: 1, equal; 0, no equal
  */
 static inline int sfe_addr_equal(sfe_ip_addr_t *a,
 				 sfe_ip_addr_t *b, int is_v4)
 {
 	return is_v4 ? sfe_ipv4_addr_equal(a->ip, b->ip) : sfe_ipv6_addr_equal(a->ip6, b->ip6);
 }

 /*
  * sfe_l2_parse_flag_set()
  *	Set L2 parse flag
  */
 static inline void sfe_l2_parse_flag_set(struct sfe_l2_info *l2_info, u16 flag)
 {
 	l2_info->parse_flags |= flag;
 }

 /*
  * sfe_l2_parse_flag_get()
  *	Get L2 parse flag
  */
 static inline u16 sfe_l2_parse_flag_get(struct sfe_l2_info *l2_info)
 {
 	return l2_info->parse_flags;
 }

 /*
  * sfe_l2_parse_flag_check()
  *	Check L2 parse flag
  */
 static inline bool sfe_l2_parse_flag_check(struct sfe_l2_info *l2_info, u16 flag)
 {
 	return !!(l2_info->parse_flags & flag);
 }

 /*
  * sfe_l2_pppoe_session_id_get()
  *	Get PPPPoE session ID from l2_info
  */
 static inline u16 sfe_l2_pppoe_session_id_get(struct sfe_l2_info *l2_info)
 {
 	return l2_info->pppoe_session_id;
 }

 /*
  * sfe_l2_pppoe_session_id_set()
  *	Set PPPoE session ID to l2_info
  */
 static inline void sfe_l2_pppoe_session_id_set(struct sfe_l2_info *l2_info, u16 session_id)
 {
 	l2_info->pppoe_session_id = session_id;
 }

 /*
  * sfe_l2_protocol_get()
  *	Get L2 protocol
  */
 static inline u16 sfe_l2_protocol_get(struct sfe_l2_info *l2_info)
 {
 	return l2_info->protocol;
 }

 /*
  * sfe_l2_protocol_set()
  *	Set L2 protocol
  */
 static inline void sfe_l2_protocol_set(struct sfe_l2_info *l2_info, u16 proto)
 {
 	l2_info->protocol = proto;
 }

 int sfe_init_if(void);
 void sfe_exit_if(void);

 #endif /* __SFE_H */
	/*
	* sfe.h
	* Shortcut forwarding engine.
	*
	* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved.
	* Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted, provided that the above
	* copyright notice and this permission notice appear in all copies.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	*/

	#ifndef __SFE_H
	#define __SFE_H

	/*
	* Maximum number of accelerated IPv4 or IPv6 connections
	*/
	#if defined(SFE_MEM_PROFILE_LOW)
	#define SFE_MAX_CONNECTION_NUM 512
	#elif defined(SFE_MEM_PROFILE_MEDIUM)
	#define SFE_MAX_CONNECTION_NUM 2048
	#else
	#define SFE_MAX_CONNECTION_NUM 4096
	#endif

	#define SFE_L2_PARSE_FLAGS_PPPOE_INGRESS 0x01 /* Indicates presence of a valid PPPoE header */

	/**
	* SAWF_metadata information placement in mark field.
	*/
	#define SFE_SAWF_VALID_TAG 0xAA
	#define SFE_SAWF_TAG_SHIFT 0x18
	#define SFE_SAWF_SERVICE_CLASS_SHIFT 0x10
	#define SFE_SAWF_SERVICE_CLASS_MASK 0xff
	#define SFE_SAWF_MSDUQ_MASK 0xffff

	/**
	* SAWF_metadata extraction.
	*/
	#define SFE_GET_SAWF_TAG(x) (x>>SFE_SAWF_TAG_SHIFT)
	#define SFE_GET_SAWF_SERVICE_CLASS(x) ((x>>SFE_SAWF_SERVICE_CLASS_SHIFT) & SFE_SAWF_SERVICE_CLASS_MASK)
	#define SFE_GET_SAWF_MSDUQ(x) (x & SFE_SAWF_MSDUQ_MASK)
	#define SFE_SAWF_TAG_IS_VALID(x) ((x == SFE_SAWF_VALID_TAG) ? true : false)

	/*
	* IPv6 address structure
	*/
	struct sfe_ipv6_addr {
	__be32 addr[4];
	};

	typedef union {
	__be32 ip;
	struct sfe_ipv6_addr ip6[1];
	} sfe_ip_addr_t;

	typedef enum sfe_sync_reason {
	SFE_SYNC_REASON_STATS, /* Sync is to synchronize stats */
	SFE_SYNC_REASON_FLUSH, /* Sync is to flush a entry */
	SFE_SYNC_REASON_DESTROY /* Sync is to destroy a entry(requested by connection manager) */
	} sfe_sync_reason_t;

	/*
	* VLAN header (aka VLAN tag)
	*/
	struct sfe_vlan_hdr {
	u16 tpid; /* Tag Protocol Identifier */
	u16 tci; /* Tag Control Information */
	};

	/*
	* Structure used to store L2 information
	*/
	struct sfe_l2_info {
	u16 parse_flags; /* Flags indicating L2.5 headers presence */
	u16 pppoe_session_id; /* PPPOE header offset */
	u16 protocol; /* L3 Protocol */
	struct sfe_vlan_hdr vlan_hdr[SFE_MAX_VLAN_DEPTH];
	/* VLAN tag(s) of ingress packet */
	u8 vlan_hdr_cnt; /* Number of VLAN tags in the ingress packet */
	};

	/*
	* Structure used to sync connection stats/state back within the system.
	*
	* NOTE: The addresses here are NON-NAT addresses, i.e. the true endpoint addressing.
	* 'src' is the creator of the connection.
	*/
	struct sfe_connection_sync {
	struct net_device *src_dev;
	struct net_device *dest_dev;
	int is_v6; /* Is it for ipv6? */
	int protocol; /* IP protocol number (IPPROTO_...) */
	sfe_ip_addr_t src_ip; /* Non-NAT source address, i.e. the creator of the connection */
	sfe_ip_addr_t src_ip_xlate; /* NATed source address */
	__be16 src_port; /* Non-NAT source port */
	__be16 src_port_xlate; /* NATed source port */
	sfe_ip_addr_t dest_ip; /* Non-NAT destination address, i.e. to whom the connection was created */
	sfe_ip_addr_t dest_ip_xlate; /* NATed destination address */
	__be16 dest_port; /* Non-NAT destination port */
	__be16 dest_port_xlate; /* NATed destination port */
	u32 src_td_max_window;
	u32 src_td_end;
	u32 src_td_max_end;
	u64 src_packet_count;
	u64 src_byte_count;
	u32 src_new_packet_count;
	u32 src_new_byte_count;
	u32 dest_td_max_window;
	u32 dest_td_end;
	u32 dest_td_max_end;
	u64 dest_packet_count;
	u64 dest_byte_count;
	u32 dest_new_packet_count;
	u32 dest_new_byte_count;
	u32 reason; /* reason for stats sync message, i.e. destroy, flush, period sync */
	u64 delta_jiffies; /* Time to be added to the current timeout to keep the connection alive */
	};

	/*
	* Expose the hook for the receive processing.
	*/
	extern int (athrs_fast_nat_recv)(struct sk_buff skb);

	/*
	* Expose what should be a static flag in the TCP connection tracker.
	*/
	extern int nf_ct_tcp_no_window_check;

	/*
	* Check the fast transmit feasibility.
	*/
	bool sfe_fast_xmit_check(struct sk_buff *skb, netdev_features_t features);

	/*
	* This callback will be called in a timer
	* at 100 times per second to sync stats back to
	* Linux connection track.
	*
	* A RCU lock is taken to prevent this callback
	* from unregistering.
	*/
	typedef void (sfe_sync_rule_callback_t)(struct sfe_connection_sync );
	typedef void (sfe_ipv4_many_sync_callback_t)(struct sfe_ipv4_msg msg);
	typedef void (sfe_ipv6_many_sync_callback_t)(struct sfe_ipv6_msg msg);

	/*
	* IPv4 APIs used by connection manager
	*/
	int sfe_ipv4_recv(struct net_device dev, struct sk_buff skb, struct sfe_l2_info *l2_info, bool tun_outer);
	int sfe_ipv4_create_rule(struct sfe_ipv4_rule_create_msg *msg);
	void sfe_ipv4_destroy_rule(struct sfe_ipv4_rule_destroy_msg *msg);
	void sfe_ipv4_destroy_all_rules_for_dev(struct net_device *dev);
	void sfe_ipv4_register_sync_rule_callback(sfe_sync_rule_callback_t callback);
	void sfe_ipv4_update_rule(struct sfe_ipv4_rule_create_msg *msg);
	bool sfe_dev_has_hw_csum(struct net_device *dev);

	bool sfe_ipv4_sync_invoke(uint16_t index);
	void sfe_ipv4_register_many_sync_callback(sfe_ipv4_many_sync_callback_t cb);
	void sfe_ipv4_stats_convert(struct sfe_ipv4_conn_sync sync_msg, struct sfe_connection_sync sis);
	#ifdef SFE_SUPPORT_IPV6
	/*
	* IPv6 APIs used by connection manager
	*/
	int sfe_ipv6_recv(struct net_device dev, struct sk_buff skb, struct sfe_l2_info *l2_info, bool tun_outer);
	int sfe_ipv6_create_rule(struct sfe_ipv6_rule_create_msg *msg);
	void sfe_ipv6_destroy_rule(struct sfe_ipv6_rule_destroy_msg *msg);
	void sfe_ipv6_destroy_all_rules_for_dev(struct net_device *dev);
	void sfe_ipv6_register_sync_rule_callback(sfe_sync_rule_callback_t callback);
	void sfe_ipv6_update_rule(struct sfe_ipv6_rule_create_msg *msg);
	bool sfe_ipv6_sync_invoke(uint16_t index);
	void sfe_ipv6_register_many_sync_callback(sfe_ipv6_many_sync_callback_t cb);
	void sfe_ipv6_stats_convert(struct sfe_ipv6_conn_sync sync_msg, struct sfe_connection_sync sis);
	#else
	static inline int sfe_ipv6_recv(struct net_device dev, struct sk_buff skb, struct sfe_l2_info *l2_info, bool tun_outer)
	{
	return 0;
	}

	static inline int sfe_ipv6_create_rule(struct sfe_ipv6_rule_create_msg *msg)
	{
	return 0;
	}

	static inline void sfe_ipv6_destroy_rule(struct sfe_ipv6_rule_destroy_msg *msg)
	{
	return;
	}

	static inline void sfe_ipv6_destroy_all_rules_for_dev(struct net_device *dev)
	{
	return;
	}

	static inline void sfe_ipv6_register_sync_rule_callback(sfe_sync_rule_callback_t callback)
	{
	return;
	}

	static inline void sfe_ipv6_update_rule(struct sfe_ipv6_rule_create_msg *msg)
	{
	return;
	}

	static inline bool sfe_ipv6_sync_invoke(uint16_t index)
	{
	return false;
	}

	static inline void sfe_ipv6_register_many_sync_callback(sfe_ipv6_many_sync_callback_t cb)
	{
	return;
	}

	static inline void sfe_ipv6_stats_convert(struct sfe_ipv6_conn_sync sync_msg, struct sfe_connection_sync sis)
	{
	return;
	}
	#endif

	/*
	* sfe_ipv6_addr_equal()
	* compare ipv6 address
	*
	* return: 1, equal; 0, no equal
	*/
	static inline int sfe_ipv6_addr_equal(struct sfe_ipv6_addr *a,
	struct sfe_ipv6_addr *b)
	{
	return a->addr[0] == b->addr[0] &&
	a->addr[1] == b->addr[1] &&
	a->addr[2] == b->addr[2] &&
	a->addr[3] == b->addr[3];
	}

	/*
	* sfe_ipv4_addr_equal()
	* compare ipv4 address
	*
	* return: 1, equal; 0, no equal
	*/
	#define sfe_ipv4_addr_equal(a, b) ((u32)(a) == (u32)(b))

	/*
	* sfe_addr_equal()
	* compare ipv4 or ipv6 address
	*
	* return: 1, equal; 0, no equal
	*/
	static inline int sfe_addr_equal(sfe_ip_addr_t *a,
	sfe_ip_addr_t *b, int is_v4)
	{
	return is_v4 ? sfe_ipv4_addr_equal(a->ip, b->ip) : sfe_ipv6_addr_equal(a->ip6, b->ip6);
	}

	/*
	* sfe_l2_parse_flag_set()
	* Set L2 parse flag
	*/
	static inline void sfe_l2_parse_flag_set(struct sfe_l2_info *l2_info, u16 flag)
	{
	l2_info->parse_flags \|= flag;
	}

	/*
	* sfe_l2_parse_flag_get()
	* Get L2 parse flag
	*/
	static inline u16 sfe_l2_parse_flag_get(struct sfe_l2_info *l2_info)
	{
	return l2_info->parse_flags;
	}

	/*
	* sfe_l2_parse_flag_check()
	* Check L2 parse flag
	*/
	static inline bool sfe_l2_parse_flag_check(struct sfe_l2_info *l2_info, u16 flag)
	{
	return !!(l2_info->parse_flags & flag);
	}

	/*
	* sfe_l2_pppoe_session_id_get()
	* Get PPPPoE session ID from l2_info
	*/
	static inline u16 sfe_l2_pppoe_session_id_get(struct sfe_l2_info *l2_info)
	{
	return l2_info->pppoe_session_id;
	}

	/*
	* sfe_l2_pppoe_session_id_set()
	* Set PPPoE session ID to l2_info
	*/
	static inline void sfe_l2_pppoe_session_id_set(struct sfe_l2_info *l2_info, u16 session_id)
	{
	l2_info->pppoe_session_id = session_id;
	}

	/*
	* sfe_l2_protocol_get()
	* Get L2 protocol
	*/
	static inline u16 sfe_l2_protocol_get(struct sfe_l2_info *l2_info)
	{
	return l2_info->protocol;
	}

	/*
	* sfe_l2_protocol_set()
	* Set L2 protocol
	*/
	static inline void sfe_l2_protocol_set(struct sfe_l2_info *l2_info, u16 proto)
	{
	l2_info->protocol = proto;
	}

	int sfe_init_if(void);
	void sfe_exit_if(void);

	#endif /* __SFE_H */