[mirror_ubuntu-bionic-kernel.git] / include / net / flow.h

/*
 *
 *	Generic internet FLOW.
 *
 */

#ifndef _NET_FLOW_H
#define _NET_FLOW_H

#include <linux/in6.h>
#include <asm/atomic.h>

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_PRECOW_METRICS	0x02
#define FLOWI_FLAG_CAN_SLEEP		0x04
	__u32	flowic_secid;
};

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

	struct {
		__u8	type;
		__u8	code;
	} icmpt;

	struct {
		__le16	sport;
		__le16	dport;
	} 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
	__be32			daddr;
	__be32			saddr;
	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
};

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_tos		__fl_common.flowic_tos
#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
	struct in6_addr		daddr;
	struct in6_addr		saddr;
	__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
};

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
};

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
} __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);
}

#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);

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

extern void flow_cache_flush(void);
extern atomic_t flow_cache_genid;

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* Generic internet FLOW.
	4	*
	5	*/
	6
	7	#ifndef _NET_FLOW_H
	8	#define _NET_FLOW_H
	9
	10	#include <linux/in6.h>
	11	#include <asm/atomic.h>
	12
806566cc DM	13	struct flowi_common {
	14	int flowic_oif;
	15	int flowic_iif;
	16	__u32 flowic_mark;
	17	__u8 flowic_tos;
	18	__u8 flowic_scope;
	19	__u8 flowic_proto;
	20	__u8 flowic_flags;
fbef0a40 DM	21	#define FLOWI_FLAG_ANYSRC 0x01
	22	#define FLOWI_FLAG_PRECOW_METRICS 0x02
	23	#define FLOWI_FLAG_CAN_SLEEP 0x04
806566cc DM	24	__u32 flowic_secid;
	25	};
	26
08704bcb DM	27	union flowi_uli {
	28	struct {
	29	__be16 sport;
	30	__be16 dport;
	31	} ports;
	32
	33	struct {
	34	__u8 type;
	35	__u8 code;
	36	} icmpt;
	37
	38	struct {
	39	__le16 sport;
	40	__le16 dport;
	41	} dnports;
	42
	43	__be32 spi;
	44	__be32 gre_key;
	45
	46	struct {
	47	__u8 type;
	48	} mht;
	49	};
	50
56bb8059 DM	51	struct flowi4 {
56bb8059 DM	52	struct flowi_common __fl_common;
22bd5b9b DM	53	#define flowi4_oif __fl_common.flowic_oif
	54	#define flowi4_iif __fl_common.flowic_iif
	55	#define flowi4_mark __fl_common.flowic_mark
	56	#define flowi4_tos __fl_common.flowic_tos
	57	#define flowi4_scope __fl_common.flowic_scope
	58	#define flowi4_proto __fl_common.flowic_proto
	59	#define flowi4_flags __fl_common.flowic_flags
	60	#define flowi4_secid __fl_common.flowic_secid
56bb8059 DM	61	__be32 daddr;
	62	__be32 saddr;
	63	union flowi_uli uli;
9cce96df DM	64	#define fl4_sport uli.ports.sport
	65	#define fl4_dport uli.ports.dport
	66	#define fl4_icmp_type uli.icmpt.type
	67	#define fl4_icmp_code uli.icmpt.code
	68	#define fl4_ipsec_spi uli.spi
	69	#define fl4_mh_type uli.mht.type
	70	#define fl4_gre_key uli.gre_key
56bb8059 DM	71	};
	72
	73	struct flowi6 {
806566cc	74	struct flowi_common __fl_common;
2032656e DM	75	#define flowi6_oif __fl_common.flowic_oif
	76	#define flowi6_iif __fl_common.flowic_iif
	77	#define flowi6_mark __fl_common.flowic_mark
	78	#define flowi6_tos __fl_common.flowic_tos
	79	#define flowi6_scope __fl_common.flowic_scope
	80	#define flowi6_proto __fl_common.flowic_proto
	81	#define flowi6_flags __fl_common.flowic_flags
	82	#define flowi6_secid __fl_common.flowic_secid
56bb8059 DM	83	struct in6_addr daddr;
	84	struct in6_addr saddr;
	85	__be32 flowlabel;
	86	union flowi_uli uli;
1958b856 DM	87	#define fl6_sport uli.ports.sport
	88	#define fl6_dport uli.ports.dport
	89	#define fl6_icmp_type uli.icmpt.type
	90	#define fl6_icmp_code uli.icmpt.code
	91	#define fl6_ipsec_spi uli.spi
	92	#define fl6_mh_type uli.mht.type
	93	#define fl6_gre_key uli.gre_key
56bb8059	94	};
1da177e4	95
56bb8059 DM	96	struct flowidn {
56bb8059 DM	97	struct flowi_common __fl_common;
bef55aeb DM	98	#define flowidn_oif __fl_common.flowic_oif
	99	#define flowidn_iif __fl_common.flowic_iif
	100	#define flowidn_mark __fl_common.flowic_mark
	101	#define flowidn_scope __fl_common.flowic_scope
	102	#define flowidn_proto __fl_common.flowic_proto
	103	#define flowidn_flags __fl_common.flowic_flags
56bb8059 DM	104	__le16 daddr;
	105	__le16 saddr;
	106	union flowi_uli uli;
bef55aeb DM	107	#define fld_sport uli.ports.sport
bef55aeb DM	108	#define fld_dport uli.ports.dport
56bb8059 DM	109	};
	110
	111	struct flowi {
1da177e4	112	union {
56bb8059 DM	113	struct flowi_common __fl_common;
	114	struct flowi4 ip4;
	115	struct flowi6 ip6;
	116	struct flowidn dn;
	117	} u;
	118	#define flowi_oif u.__fl_common.flowic_oif
	119	#define flowi_iif u.__fl_common.flowic_iif
	120	#define flowi_mark u.__fl_common.flowic_mark
	121	#define flowi_tos u.__fl_common.flowic_tos
	122	#define flowi_scope u.__fl_common.flowic_scope
	123	#define flowi_proto u.__fl_common.flowic_proto
	124	#define flowi_flags u.__fl_common.flowic_flags
	125	#define flowi_secid u.__fl_common.flowic_secid
1da177e4 LT	126	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4 LT	127
59b1a94c DM	128	static inline struct flowi flowi4_to_flowi(struct flowi4 fl4)
	129	{
	130	return container_of(fl4, struct flowi, u.ip4);
	131	}
	132
	133	static inline struct flowi flowi6_to_flowi(struct flowi6 fl6)
	134	{
	135	return container_of(fl6, struct flowi, u.ip6);
	136	}
	137
	138	static inline struct flowi flowidn_to_flowi(struct flowidn fldn)
	139	{
	140	return container_of(fldn, struct flowi, u.dn);
	141	}
	142
1da177e4 LT	143	#define FLOW_DIR_IN 0
	144	#define FLOW_DIR_OUT 1
	145	#define FLOW_DIR_FWD 2
	146
52479b62	147	struct net;
df71837d	148	struct sock;
fe1a5f03 TT	149	struct flow_cache_ops;
	150
	151	struct flow_cache_object {
	152	const struct flow_cache_ops *ops;
	153	};
	154
	155	struct flow_cache_ops {
	156	struct flow_cache_object (get)(struct flow_cache_object *);
	157	int (check)(struct flow_cache_object );
	158	void (delete)(struct flow_cache_object );
	159	};
	160
	161	typedef struct flow_cache_object (flow_resolve_t)(
dee9f4bc	162	struct net net, const struct flowi key, u16 family,
fe1a5f03 TT	163	u8 dir, struct flow_cache_object oldobj, void ctx);
	164
	165	extern struct flow_cache_object *flow_cache_lookup(
dee9f4bc	166	struct net net, const struct flowi key, u16 family,
fe1a5f03	167	u8 dir, flow_resolve_t resolver, void *ctx);
1da177e4	168
1da177e4 LT	169	extern void flow_cache_flush(void);
	170	extern atomic_t flow_cache_genid;
	171
	172	#endif