include/net/flow.h - kernel/quantenna - Git at Google

 /*
  *
  *	Generic internet FLOW.
  *
  */

 #ifndef _NET_FLOW_H
 #define _NET_FLOW_H

 #include <linux/socket.h>
 #include <linux/in6.h>
 #include <linux/atomic.h>
 #include <net/flow_dissector.h>

 /*
  * ifindex generation is per-net namespace, and loopback is
  * always the 1st device in ns (see net_dev_init), thus any
  * loopback device should get ifindex 1
  */

 #define LOOPBACK_IFINDEX	1

 struct flowi_tunnel {
 	__be64			tun_id;
 };

 struct flowi_common {
 	int	flowic_oif;
 	int	flowic_iif;
 	__u32	flowic_mark;
 	__u8	flowic_tos;
 	__u8	flowic_scope;
 	__u8	flowic_proto;
 	__u8	flowic_flags;
 #define FLOWI_FLAG_ANYSRC		0x01
 #define FLOWI_FLAG_KNOWN_NH		0x02
 #define FLOWI_FLAG_L3MDEV_SRC		0x04
 #define FLOWI_FLAG_SKIP_NH_OIF		0x08
 	__u32	flowic_secid;
 	struct flowi_tunnel flowic_tun_key;
 };

 union flowi_uli {
 	struct {
 		__be16	dport;
 		__be16	sport;
 	} ports;

 	struct {
 		__u8	type;
 		__u8	code;
 	} icmpt;

 	struct {
 		__le16	dport;
 		__le16	sport;
 	} dnports;

 	__be32		spi;
 	__be32		gre_key;

 	struct {
 		__u8	type;
 	} mht;
 };

 struct flowi4 {
 	struct flowi_common	__fl_common;
 #define flowi4_oif		__fl_common.flowic_oif
 #define flowi4_iif		__fl_common.flowic_iif
 #define flowi4_mark		__fl_common.flowic_mark
 #define flowi4_tos		__fl_common.flowic_tos
 #define flowi4_scope		__fl_common.flowic_scope
 #define flowi4_proto		__fl_common.flowic_proto
 #define flowi4_flags		__fl_common.flowic_flags
 #define flowi4_secid		__fl_common.flowic_secid
 #define flowi4_tun_key		__fl_common.flowic_tun_key

 	/* (saddr,daddr) must be grouped, same order as in IP header */
 	__be32			saddr;
 	__be32			daddr;

 	union flowi_uli		uli;
 #define fl4_sport		uli.ports.sport
 #define fl4_dport		uli.ports.dport
 #define fl4_icmp_type		uli.icmpt.type
 #define fl4_icmp_code		uli.icmpt.code
 #define fl4_ipsec_spi		uli.spi
 #define fl4_mh_type		uli.mht.type
 #define fl4_gre_key		uli.gre_key
 } __attribute__((__aligned__(BITS_PER_LONG/8)));

 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
 				      __u32 mark, __u8 tos, __u8 scope,
 				      __u8 proto, __u8 flags,
 				      __be32 daddr, __be32 saddr,
 				      __be16 dport, __be16 sport)
 {
 	fl4->flowi4_oif = oif;
 	fl4->flowi4_iif = LOOPBACK_IFINDEX;
 	fl4->flowi4_mark = mark;
 	fl4->flowi4_tos = tos;
 	fl4->flowi4_scope = scope;
 	fl4->flowi4_proto = proto;
 	fl4->flowi4_flags = flags;
 	fl4->flowi4_secid = 0;
 	fl4->flowi4_tun_key.tun_id = 0;
 	fl4->daddr = daddr;
 	fl4->saddr = saddr;
 	fl4->fl4_dport = dport;
 	fl4->fl4_sport = sport;
 }

 /* Reset some input parameters after previous lookup */
 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
 					__be32 daddr, __be32 saddr)
 {
 	fl4->flowi4_oif = oif;
 	fl4->flowi4_tos = tos;
 	fl4->daddr = daddr;
 	fl4->saddr = saddr;
 }


 struct flowi6 {
 	struct flowi_common	__fl_common;
 #define flowi6_oif		__fl_common.flowic_oif
 #define flowi6_iif		__fl_common.flowic_iif
 #define flowi6_mark		__fl_common.flowic_mark
 #define flowi6_scope		__fl_common.flowic_scope
 #define flowi6_proto		__fl_common.flowic_proto
 #define flowi6_flags		__fl_common.flowic_flags
 #define flowi6_secid		__fl_common.flowic_secid
 #define flowi6_tun_key		__fl_common.flowic_tun_key
 	struct in6_addr		daddr;
 	struct in6_addr		saddr;
 	/* Note: flowi6_tos is encoded in flowlabel, too. */
 	__be32			flowlabel;
 	union flowi_uli		uli;
 #define fl6_sport		uli.ports.sport
 #define fl6_dport		uli.ports.dport
 #define fl6_icmp_type		uli.icmpt.type
 #define fl6_icmp_code		uli.icmpt.code
 #define fl6_ipsec_spi		uli.spi
 #define fl6_mh_type		uli.mht.type
 #define fl6_gre_key		uli.gre_key
 } __attribute__((__aligned__(BITS_PER_LONG/8)));

 struct flowidn {
 	struct flowi_common	__fl_common;
 #define flowidn_oif		__fl_common.flowic_oif
 #define flowidn_iif		__fl_common.flowic_iif
 #define flowidn_mark		__fl_common.flowic_mark
 #define flowidn_scope		__fl_common.flowic_scope
 #define flowidn_proto		__fl_common.flowic_proto
 #define flowidn_flags		__fl_common.flowic_flags
 	__le16			daddr;
 	__le16			saddr;
 	union flowi_uli		uli;
 #define fld_sport		uli.ports.sport
 #define fld_dport		uli.ports.dport
 } __attribute__((__aligned__(BITS_PER_LONG/8)));

 struct flowi {
 	union {
 		struct flowi_common	__fl_common;
 		struct flowi4		ip4;
 		struct flowi6		ip6;
 		struct flowidn		dn;
 	} u;
 #define flowi_oif	u.__fl_common.flowic_oif
 #define flowi_iif	u.__fl_common.flowic_iif
 #define flowi_mark	u.__fl_common.flowic_mark
 #define flowi_tos	u.__fl_common.flowic_tos
 #define flowi_scope	u.__fl_common.flowic_scope
 #define flowi_proto	u.__fl_common.flowic_proto
 #define flowi_flags	u.__fl_common.flowic_flags
 #define flowi_secid	u.__fl_common.flowic_secid
 #define flowi_tun_key	u.__fl_common.flowic_tun_key
 } __attribute__((__aligned__(BITS_PER_LONG/8)));

 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
 {
 	return container_of(fl4, struct flowi, u.ip4);
 }

 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
 {
 	return container_of(fl6, struct flowi, u.ip6);
 }

 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
 {
 	return container_of(fldn, struct flowi, u.dn);
 }

 typedef unsigned long flow_compare_t;

 static inline size_t flow_key_size(u16 family)
 {
 	switch (family) {
 	case AF_INET:
 		BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
 		return sizeof(struct flowi4) / sizeof(flow_compare_t);
 	case AF_INET6:
 		BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
 		return sizeof(struct flowi6) / sizeof(flow_compare_t);
 	case AF_DECnet:
 		BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
 		return sizeof(struct flowidn) / sizeof(flow_compare_t);
 	}
 	return 0;
 }

 #define FLOW_DIR_IN	0
 #define FLOW_DIR_OUT	1
 #define FLOW_DIR_FWD	2

 struct net;
 struct sock;
 struct flow_cache_ops;

 struct flow_cache_object {
 	const struct flow_cache_ops *ops;
 };

 struct flow_cache_ops {
 	struct flow_cache_object *(*get)(struct flow_cache_object *);
 	int (*check)(struct flow_cache_object *);
 	void (*delete)(struct flow_cache_object *);
 };

 typedef struct flow_cache_object *(*flow_resolve_t)(
 		struct net *net, const struct flowi *key, u16 family,
 		u8 dir, struct flow_cache_object *oldobj, void *ctx);

 struct flow_cache_object *flow_cache_lookup(struct net *net,
 					    const struct flowi *key, u16 family,
 					    u8 dir, flow_resolve_t resolver,
 					    void *ctx);
 int flow_cache_init(struct net *net);
 void flow_cache_fini(struct net *net);

 void flow_cache_flush(struct net *net);
 void flow_cache_flush_deferred(struct net *net);
 extern atomic_t flow_cache_genid;

 __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys);

 static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
 {
 	struct flow_keys keys;

 	return __get_hash_from_flowi6(fl6, &keys);
 }

 __u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys);

 static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
 {
 	struct flow_keys keys;

 	return __get_hash_from_flowi4(fl4, &keys);
 }

 #endif
	/*
	*
	* Generic internet FLOW.
	*
	*/

	#ifndef _NET_FLOW_H
	#define _NET_FLOW_H

	#include <linux/socket.h>
	#include <linux/in6.h>
	#include <linux/atomic.h>
	#include <net/flow_dissector.h>

	/*
	* ifindex generation is per-net namespace, and loopback is
	* always the 1st device in ns (see net_dev_init), thus any
	* loopback device should get ifindex 1
	*/

	#define LOOPBACK_IFINDEX 1

	struct flowi_tunnel {
	__be64 tun_id;
	};

	struct flowi_common {
	int flowic_oif;
	int flowic_iif;
	__u32 flowic_mark;
	__u8 flowic_tos;
	__u8 flowic_scope;
	__u8 flowic_proto;
	__u8 flowic_flags;
	#define FLOWI_FLAG_ANYSRC 0x01
	#define FLOWI_FLAG_KNOWN_NH 0x02
	#define FLOWI_FLAG_L3MDEV_SRC 0x04
	#define FLOWI_FLAG_SKIP_NH_OIF 0x08
	__u32 flowic_secid;
	struct flowi_tunnel flowic_tun_key;
	};

	union flowi_uli {
	struct {
	__be16 dport;
	__be16 sport;
	} ports;

	struct {
	__u8 type;
	__u8 code;
	} icmpt;

	struct {
	__le16 dport;
	__le16 sport;
	} dnports;

	__be32 spi;
	__be32 gre_key;

	struct {
	__u8 type;
	} mht;
	};

	struct flowi4 {
	struct flowi_common __fl_common;
	#define flowi4_oif __fl_common.flowic_oif
	#define flowi4_iif __fl_common.flowic_iif
	#define flowi4_mark __fl_common.flowic_mark
	#define flowi4_tos __fl_common.flowic_tos
	#define flowi4_scope __fl_common.flowic_scope
	#define flowi4_proto __fl_common.flowic_proto
	#define flowi4_flags __fl_common.flowic_flags
	#define flowi4_secid __fl_common.flowic_secid
	#define flowi4_tun_key __fl_common.flowic_tun_key

	/* (saddr,daddr) must be grouped, same order as in IP header */
	__be32 saddr;
	__be32 daddr;

	union flowi_uli uli;
	#define fl4_sport uli.ports.sport
	#define fl4_dport uli.ports.dport
	#define fl4_icmp_type uli.icmpt.type
	#define fl4_icmp_code uli.icmpt.code
	#define fl4_ipsec_spi uli.spi
	#define fl4_mh_type uli.mht.type
	#define fl4_gre_key uli.gre_key
	} __attribute__((__aligned__(BITS_PER_LONG/8)));

	static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
	__u32 mark, __u8 tos, __u8 scope,
	__u8 proto, __u8 flags,
	__be32 daddr, __be32 saddr,
	__be16 dport, __be16 sport)
	{
	fl4->flowi4_oif = oif;
	fl4->flowi4_iif = LOOPBACK_IFINDEX;
	fl4->flowi4_mark = mark;
	fl4->flowi4_tos = tos;
	fl4->flowi4_scope = scope;
	fl4->flowi4_proto = proto;
	fl4->flowi4_flags = flags;
	fl4->flowi4_secid = 0;
	fl4->flowi4_tun_key.tun_id = 0;
	fl4->daddr = daddr;
	fl4->saddr = saddr;
	fl4->fl4_dport = dport;
	fl4->fl4_sport = sport;
	}

	/* Reset some input parameters after previous lookup */
	static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
	__be32 daddr, __be32 saddr)
	{
	fl4->flowi4_oif = oif;
	fl4->flowi4_tos = tos;
	fl4->daddr = daddr;
	fl4->saddr = saddr;
	}


	struct flowi6 {
	struct flowi_common __fl_common;
	#define flowi6_oif __fl_common.flowic_oif
	#define flowi6_iif __fl_common.flowic_iif
	#define flowi6_mark __fl_common.flowic_mark
	#define flowi6_scope __fl_common.flowic_scope
	#define flowi6_proto __fl_common.flowic_proto
	#define flowi6_flags __fl_common.flowic_flags
	#define flowi6_secid __fl_common.flowic_secid
	#define flowi6_tun_key __fl_common.flowic_tun_key
	struct in6_addr daddr;
	struct in6_addr saddr;
	/* Note: flowi6_tos is encoded in flowlabel, too. */
	__be32 flowlabel;
	union flowi_uli uli;
	#define fl6_sport uli.ports.sport
	#define fl6_dport uli.ports.dport
	#define fl6_icmp_type uli.icmpt.type
	#define fl6_icmp_code uli.icmpt.code
	#define fl6_ipsec_spi uli.spi
	#define fl6_mh_type uli.mht.type
	#define fl6_gre_key uli.gre_key
	} __attribute__((__aligned__(BITS_PER_LONG/8)));

	struct flowidn {
	struct flowi_common __fl_common;
	#define flowidn_oif __fl_common.flowic_oif
	#define flowidn_iif __fl_common.flowic_iif
	#define flowidn_mark __fl_common.flowic_mark
	#define flowidn_scope __fl_common.flowic_scope
	#define flowidn_proto __fl_common.flowic_proto
	#define flowidn_flags __fl_common.flowic_flags
	__le16 daddr;
	__le16 saddr;
	union flowi_uli uli;
	#define fld_sport uli.ports.sport
	#define fld_dport uli.ports.dport
	} __attribute__((__aligned__(BITS_PER_LONG/8)));

	struct flowi {
	union {
	struct flowi_common __fl_common;
	struct flowi4 ip4;
	struct flowi6 ip6;
	struct flowidn dn;
	} u;
	#define flowi_oif u.__fl_common.flowic_oif
	#define flowi_iif u.__fl_common.flowic_iif
	#define flowi_mark u.__fl_common.flowic_mark
	#define flowi_tos u.__fl_common.flowic_tos
	#define flowi_scope u.__fl_common.flowic_scope
	#define flowi_proto u.__fl_common.flowic_proto
	#define flowi_flags u.__fl_common.flowic_flags
	#define flowi_secid u.__fl_common.flowic_secid
	#define flowi_tun_key u.__fl_common.flowic_tun_key
	} __attribute__((__aligned__(BITS_PER_LONG/8)));

	static inline struct flowi flowi4_to_flowi(struct flowi4 fl4)
	{
	return container_of(fl4, struct flowi, u.ip4);
	}

	static inline struct flowi flowi6_to_flowi(struct flowi6 fl6)
	{
	return container_of(fl6, struct flowi, u.ip6);
	}

	static inline struct flowi flowidn_to_flowi(struct flowidn fldn)
	{
	return container_of(fldn, struct flowi, u.dn);
	}

	typedef unsigned long flow_compare_t;

	static inline size_t flow_key_size(u16 family)
	{
	switch (family) {
	case AF_INET:
	BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
	return sizeof(struct flowi4) / sizeof(flow_compare_t);
	case AF_INET6:
	BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
	return sizeof(struct flowi6) / sizeof(flow_compare_t);
	case AF_DECnet:
	BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
	return sizeof(struct flowidn) / sizeof(flow_compare_t);
	}
	return 0;
	}

	#define FLOW_DIR_IN 0
	#define FLOW_DIR_OUT 1
	#define FLOW_DIR_FWD 2

	struct net;
	struct sock;
	struct flow_cache_ops;

	struct flow_cache_object {
	const struct flow_cache_ops *ops;
	};

	struct flow_cache_ops {
	struct flow_cache_object (get)(struct flow_cache_object *);
	int (check)(struct flow_cache_object );
	void (delete)(struct flow_cache_object );
	};

	typedef struct flow_cache_object (flow_resolve_t)(
	struct net net, const struct flowi key, u16 family,
	u8 dir, struct flow_cache_object oldobj, void ctx);

	struct flow_cache_object flow_cache_lookup(struct net net,
	const struct flowi *key, u16 family,
	u8 dir, flow_resolve_t resolver,
	void *ctx);
	int flow_cache_init(struct net *net);
	void flow_cache_fini(struct net *net);

	void flow_cache_flush(struct net *net);
	void flow_cache_flush_deferred(struct net *net);
	extern atomic_t flow_cache_genid;

	__u32 __get_hash_from_flowi6(const struct flowi6 fl6, struct flow_keys keys);

	static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
	{
	struct flow_keys keys;

	return __get_hash_from_flowi6(fl6, &keys);
	}

	__u32 __get_hash_from_flowi4(const struct flowi4 fl4, struct flow_keys keys);

	static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
	{
	struct flow_keys keys;

	return __get_hash_from_flowi4(fl4, &keys);
	}

	#endif