[linux.git] / include / net / flow.h

/*
 *
 *	Generic internet FLOW.
 *
 */

#ifndef _NET_FLOW_H
#define _NET_FLOW_H

#include <linux/socket.h>
#include <linux/in6.h>
#include <linux/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_CAN_SLEEP		0x02
#define FLOWI_FLAG_KNOWN_NH		0x04
	__u32	flowic_secid;
};

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

	/* (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 = 0;
	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->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_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
} __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
} __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);

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 void flow_cache_flush_deferred(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
aa1c366e	10	#include <linux/socket.h>
1da177e4	11	#include <linux/in6.h>
60063497	12	#include <linux/atomic.h>
1da177e4	13
806566cc DM	14	struct flowi_common {
	15	int flowic_oif;
	16	int flowic_iif;
	17	__u32 flowic_mark;
	18	__u8 flowic_tos;
	19	__u8 flowic_scope;
	20	__u8 flowic_proto;
	21	__u8 flowic_flags;
fbef0a40	22	#define FLOWI_FLAG_ANYSRC 0x01
3e12939a	23	#define FLOWI_FLAG_CAN_SLEEP 0x02
c92b9655	24	#define FLOWI_FLAG_KNOWN_NH 0x04
806566cc DM	25	__u32 flowic_secid;
	26	};
	27
08704bcb DM	28	union flowi_uli {
08704bcb DM	29	struct {
08704bcb	30	__be16 dport;
9b12c75b	31	__be16 sport;
08704bcb DM	32	} ports;
	33
	34	struct {
	35	__u8 type;
	36	__u8 code;
	37	} icmpt;
	38
	39	struct {
08704bcb	40	__le16 dport;
9b12c75b	41	__le16 sport;
08704bcb DM	42	} dnports;
	43
	44	__be32 spi;
	45	__be32 gre_key;
	46
	47	struct {
	48	__u8 type;
	49	} mht;
	50	};
	51
56bb8059 DM	52	struct flowi4 {
56bb8059 DM	53	struct flowi_common __fl_common;
22bd5b9b DM	54	#define flowi4_oif __fl_common.flowic_oif
	55	#define flowi4_iif __fl_common.flowic_iif
	56	#define flowi4_mark __fl_common.flowic_mark
	57	#define flowi4_tos __fl_common.flowic_tos
	58	#define flowi4_scope __fl_common.flowic_scope
	59	#define flowi4_proto __fl_common.flowic_proto
	60	#define flowi4_flags __fl_common.flowic_flags
	61	#define flowi4_secid __fl_common.flowic_secid
84f9307c ED	62
84f9307c ED	63	/* (saddr,daddr) must be grouped, same order as in IP header */
56bb8059	64	__be32 saddr;
84f9307c ED	65	__be32 daddr;
84f9307c ED	66
56bb8059	67	union flowi_uli uli;
9cce96df DM	68	#define fl4_sport uli.ports.sport
	69	#define fl4_dport uli.ports.dport
	70	#define fl4_icmp_type uli.icmpt.type
	71	#define fl4_icmp_code uli.icmpt.code
	72	#define fl4_ipsec_spi uli.spi
	73	#define fl4_mh_type uli.mht.type
	74	#define fl4_gre_key uli.gre_key
728871bc	75	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059	76
83229aa5 DM	77	static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
	78	__u32 mark, __u8 tos, __u8 scope,
	79	__u8 proto, __u8 flags,
	80	__be32 daddr, __be32 saddr,
747465ef	81	__be16 dport, __be16 sport)
83229aa5 DM	82	{
	83	fl4->flowi4_oif = oif;
	84	fl4->flowi4_iif = 0;
	85	fl4->flowi4_mark = mark;
	86	fl4->flowi4_tos = tos;
	87	fl4->flowi4_scope = scope;
	88	fl4->flowi4_proto = proto;
	89	fl4->flowi4_flags = flags;
	90	fl4->flowi4_secid = 0;
	91	fl4->daddr = daddr;
	92	fl4->saddr = saddr;
83229aa5	93	fl4->fl4_dport = dport;
9b12c75b	94	fl4->fl4_sport = sport;
83229aa5	95	}
e6b45241 JA	96
	97	/* Reset some input parameters after previous lookup */
	98	static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
	99	__be32 daddr, __be32 saddr)
	100	{
	101	fl4->flowi4_oif = oif;
	102	fl4->flowi4_tos = tos;
	103	fl4->daddr = daddr;
	104	fl4->saddr = saddr;
	105	}
83229aa5 DM	106
83229aa5 DM	107
56bb8059	108	struct flowi6 {
806566cc	109	struct flowi_common __fl_common;
2032656e DM	110	#define flowi6_oif __fl_common.flowic_oif
	111	#define flowi6_iif __fl_common.flowic_iif
	112	#define flowi6_mark __fl_common.flowic_mark
	113	#define flowi6_tos __fl_common.flowic_tos
	114	#define flowi6_scope __fl_common.flowic_scope
	115	#define flowi6_proto __fl_common.flowic_proto
	116	#define flowi6_flags __fl_common.flowic_flags
	117	#define flowi6_secid __fl_common.flowic_secid
56bb8059 DM	118	struct in6_addr daddr;
	119	struct in6_addr saddr;
	120	__be32 flowlabel;
	121	union flowi_uli uli;
1958b856 DM	122	#define fl6_sport uli.ports.sport
	123	#define fl6_dport uli.ports.dport
	124	#define fl6_icmp_type uli.icmpt.type
	125	#define fl6_icmp_code uli.icmpt.code
	126	#define fl6_ipsec_spi uli.spi
	127	#define fl6_mh_type uli.mht.type
	128	#define fl6_gre_key uli.gre_key
728871bc	129	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4	130
56bb8059 DM	131	struct flowidn {
56bb8059 DM	132	struct flowi_common __fl_common;
bef55aeb DM	133	#define flowidn_oif __fl_common.flowic_oif
	134	#define flowidn_iif __fl_common.flowic_iif
	135	#define flowidn_mark __fl_common.flowic_mark
	136	#define flowidn_scope __fl_common.flowic_scope
	137	#define flowidn_proto __fl_common.flowic_proto
	138	#define flowidn_flags __fl_common.flowic_flags
56bb8059 DM	139	__le16 daddr;
	140	__le16 saddr;
	141	union flowi_uli uli;
bef55aeb DM	142	#define fld_sport uli.ports.sport
bef55aeb DM	143	#define fld_dport uli.ports.dport
728871bc	144	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059 DM	145
56bb8059 DM	146	struct flowi {
1da177e4	147	union {
56bb8059 DM	148	struct flowi_common __fl_common;
	149	struct flowi4 ip4;
	150	struct flowi6 ip6;
	151	struct flowidn dn;
	152	} u;
	153	#define flowi_oif u.__fl_common.flowic_oif
	154	#define flowi_iif u.__fl_common.flowic_iif
	155	#define flowi_mark u.__fl_common.flowic_mark
	156	#define flowi_tos u.__fl_common.flowic_tos
	157	#define flowi_scope u.__fl_common.flowic_scope
	158	#define flowi_proto u.__fl_common.flowic_proto
	159	#define flowi_flags u.__fl_common.flowic_flags
	160	#define flowi_secid u.__fl_common.flowic_secid
1da177e4 LT	161	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4 LT	162
59b1a94c DM	163	static inline struct flowi flowi4_to_flowi(struct flowi4 fl4)
	164	{
	165	return container_of(fl4, struct flowi, u.ip4);
	166	}
	167
	168	static inline struct flowi flowi6_to_flowi(struct flowi6 fl6)
	169	{
	170	return container_of(fl6, struct flowi, u.ip6);
	171	}
	172
	173	static inline struct flowi flowidn_to_flowi(struct flowidn fldn)
	174	{
	175	return container_of(fldn, struct flowi, u.dn);
	176	}
	177
aa1c366e	178	typedef unsigned long flow_compare_t;
	179
	180	static inline size_t flow_key_size(u16 family)
	181	{
	182	switch (family) {
	183	case AF_INET:
	184	BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
	185	return sizeof(struct flowi4) / sizeof(flow_compare_t);
	186	case AF_INET6:
	187	BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
	188	return sizeof(struct flowi6) / sizeof(flow_compare_t);
	189	case AF_DECnet:
	190	BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
	191	return sizeof(struct flowidn) / sizeof(flow_compare_t);
	192	}
	193	return 0;
	194	}
	195
1da177e4 LT	196	#define FLOW_DIR_IN 0
	197	#define FLOW_DIR_OUT 1
	198	#define FLOW_DIR_FWD 2
	199
52479b62	200	struct net;
df71837d	201	struct sock;
fe1a5f03 TT	202	struct flow_cache_ops;
	203
	204	struct flow_cache_object {
	205	const struct flow_cache_ops *ops;
	206	};
	207
	208	struct flow_cache_ops {
	209	struct flow_cache_object (get)(struct flow_cache_object *);
	210	int (check)(struct flow_cache_object );
	211	void (delete)(struct flow_cache_object );
	212	};
	213
	214	typedef struct flow_cache_object (flow_resolve_t)(
dee9f4bc	215	struct net net, const struct flowi key, u16 family,
fe1a5f03 TT	216	u8 dir, struct flow_cache_object oldobj, void ctx);
	217
	218	extern struct flow_cache_object *flow_cache_lookup(
dee9f4bc	219	struct net net, const struct flowi key, u16 family,
fe1a5f03	220	u8 dir, flow_resolve_t resolver, void *ctx);
1da177e4	221
1da177e4	222	extern void flow_cache_flush(void);
c0ed1c14	223	extern void flow_cache_flush_deferred(void);
1da177e4 LT	224	extern atomic_t flow_cache_genid;
	225
	226	#endif