[deliverable/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>

/*
 * 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_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
	__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 = 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->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);

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;

#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
6a662719 CW	14	/*
	15	* ifindex generation is per-net namespace, and loopback is
	16	* always the 1st device in ns (see net_dev_init), thus any
	17	* loopback device should get ifindex 1
	18	*/
	19
	20	#define LOOPBACK_IFINDEX 1
	21
806566cc DM	22	struct flowi_common {
	23	int flowic_oif;
	24	int flowic_iif;
	25	__u32 flowic_mark;
	26	__u8 flowic_tos;
	27	__u8 flowic_scope;
	28	__u8 flowic_proto;
	29	__u8 flowic_flags;
fbef0a40	30	#define FLOWI_FLAG_ANYSRC 0x01
0e0d44ab	31	#define FLOWI_FLAG_KNOWN_NH 0x02
806566cc DM	32	__u32 flowic_secid;
	33	};
	34
08704bcb DM	35	union flowi_uli {
08704bcb DM	36	struct {
08704bcb	37	__be16 dport;
9b12c75b	38	__be16 sport;
08704bcb DM	39	} ports;
	40
	41	struct {
	42	__u8 type;
	43	__u8 code;
	44	} icmpt;
	45
	46	struct {
08704bcb	47	__le16 dport;
9b12c75b	48	__le16 sport;
08704bcb DM	49	} dnports;
	50
	51	__be32 spi;
	52	__be32 gre_key;
	53
	54	struct {
	55	__u8 type;
	56	} mht;
	57	};
	58
56bb8059 DM	59	struct flowi4 {
56bb8059 DM	60	struct flowi_common __fl_common;
22bd5b9b DM	61	#define flowi4_oif __fl_common.flowic_oif
	62	#define flowi4_iif __fl_common.flowic_iif
	63	#define flowi4_mark __fl_common.flowic_mark
	64	#define flowi4_tos __fl_common.flowic_tos
	65	#define flowi4_scope __fl_common.flowic_scope
	66	#define flowi4_proto __fl_common.flowic_proto
	67	#define flowi4_flags __fl_common.flowic_flags
	68	#define flowi4_secid __fl_common.flowic_secid
84f9307c ED	69
84f9307c ED	70	/* (saddr,daddr) must be grouped, same order as in IP header */
56bb8059	71	__be32 saddr;
84f9307c ED	72	__be32 daddr;
84f9307c ED	73
56bb8059	74	union flowi_uli uli;
9cce96df DM	75	#define fl4_sport uli.ports.sport
	76	#define fl4_dport uli.ports.dport
	77	#define fl4_icmp_type uli.icmpt.type
	78	#define fl4_icmp_code uli.icmpt.code
	79	#define fl4_ipsec_spi uli.spi
	80	#define fl4_mh_type uli.mht.type
	81	#define fl4_gre_key uli.gre_key
728871bc	82	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059	83
83229aa5 DM	84	static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
	85	__u32 mark, __u8 tos, __u8 scope,
	86	__u8 proto, __u8 flags,
	87	__be32 daddr, __be32 saddr,
747465ef	88	__be16 dport, __be16 sport)
83229aa5 DM	89	{
83229aa5 DM	90	fl4->flowi4_oif = oif;
6a662719	91	fl4->flowi4_iif = LOOPBACK_IFINDEX;
83229aa5 DM	92	fl4->flowi4_mark = mark;
	93	fl4->flowi4_tos = tos;
	94	fl4->flowi4_scope = scope;
	95	fl4->flowi4_proto = proto;
	96	fl4->flowi4_flags = flags;
	97	fl4->flowi4_secid = 0;
	98	fl4->daddr = daddr;
	99	fl4->saddr = saddr;
83229aa5	100	fl4->fl4_dport = dport;
9b12c75b	101	fl4->fl4_sport = sport;
83229aa5	102	}
e6b45241 JA	103
	104	/* Reset some input parameters after previous lookup */
	105	static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
	106	__be32 daddr, __be32 saddr)
	107	{
	108	fl4->flowi4_oif = oif;
	109	fl4->flowi4_tos = tos;
	110	fl4->daddr = daddr;
	111	fl4->saddr = saddr;
	112	}
83229aa5 DM	113
83229aa5 DM	114
56bb8059	115	struct flowi6 {
806566cc	116	struct flowi_common __fl_common;
2032656e DM	117	#define flowi6_oif __fl_common.flowic_oif
	118	#define flowi6_iif __fl_common.flowic_iif
	119	#define flowi6_mark __fl_common.flowic_mark
	120	#define flowi6_tos __fl_common.flowic_tos
	121	#define flowi6_scope __fl_common.flowic_scope
	122	#define flowi6_proto __fl_common.flowic_proto
	123	#define flowi6_flags __fl_common.flowic_flags
	124	#define flowi6_secid __fl_common.flowic_secid
56bb8059 DM	125	struct in6_addr daddr;
	126	struct in6_addr saddr;
	127	__be32 flowlabel;
	128	union flowi_uli uli;
1958b856 DM	129	#define fl6_sport uli.ports.sport
	130	#define fl6_dport uli.ports.dport
	131	#define fl6_icmp_type uli.icmpt.type
	132	#define fl6_icmp_code uli.icmpt.code
	133	#define fl6_ipsec_spi uli.spi
	134	#define fl6_mh_type uli.mht.type
	135	#define fl6_gre_key uli.gre_key
728871bc	136	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4	137
56bb8059 DM	138	struct flowidn {
56bb8059 DM	139	struct flowi_common __fl_common;
bef55aeb DM	140	#define flowidn_oif __fl_common.flowic_oif
	141	#define flowidn_iif __fl_common.flowic_iif
	142	#define flowidn_mark __fl_common.flowic_mark
	143	#define flowidn_scope __fl_common.flowic_scope
	144	#define flowidn_proto __fl_common.flowic_proto
	145	#define flowidn_flags __fl_common.flowic_flags
56bb8059 DM	146	__le16 daddr;
	147	__le16 saddr;
	148	union flowi_uli uli;
bef55aeb DM	149	#define fld_sport uli.ports.sport
bef55aeb DM	150	#define fld_dport uli.ports.dport
728871bc	151	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059 DM	152
56bb8059 DM	153	struct flowi {
1da177e4	154	union {
56bb8059 DM	155	struct flowi_common __fl_common;
	156	struct flowi4 ip4;
	157	struct flowi6 ip6;
	158	struct flowidn dn;
	159	} u;
	160	#define flowi_oif u.__fl_common.flowic_oif
	161	#define flowi_iif u.__fl_common.flowic_iif
	162	#define flowi_mark u.__fl_common.flowic_mark
	163	#define flowi_tos u.__fl_common.flowic_tos
	164	#define flowi_scope u.__fl_common.flowic_scope
	165	#define flowi_proto u.__fl_common.flowic_proto
	166	#define flowi_flags u.__fl_common.flowic_flags
	167	#define flowi_secid u.__fl_common.flowic_secid
1da177e4 LT	168	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4 LT	169
59b1a94c DM	170	static inline struct flowi flowi4_to_flowi(struct flowi4 fl4)
	171	{
	172	return container_of(fl4, struct flowi, u.ip4);
	173	}
	174
	175	static inline struct flowi flowi6_to_flowi(struct flowi6 fl6)
	176	{
	177	return container_of(fl6, struct flowi, u.ip6);
	178	}
	179
	180	static inline struct flowi flowidn_to_flowi(struct flowidn fldn)
	181	{
	182	return container_of(fldn, struct flowi, u.dn);
	183	}
	184
aa1c366e	185	typedef unsigned long flow_compare_t;
	186
	187	static inline size_t flow_key_size(u16 family)
	188	{
	189	switch (family) {
	190	case AF_INET:
	191	BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
	192	return sizeof(struct flowi4) / sizeof(flow_compare_t);
	193	case AF_INET6:
	194	BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
	195	return sizeof(struct flowi6) / sizeof(flow_compare_t);
	196	case AF_DECnet:
	197	BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
	198	return sizeof(struct flowidn) / sizeof(flow_compare_t);
	199	}
	200	return 0;
	201	}
	202
1da177e4 LT	203	#define FLOW_DIR_IN 0
	204	#define FLOW_DIR_OUT 1
	205	#define FLOW_DIR_FWD 2
	206
52479b62	207	struct net;
df71837d	208	struct sock;
fe1a5f03 TT	209	struct flow_cache_ops;
	210
	211	struct flow_cache_object {
	212	const struct flow_cache_ops *ops;
	213	};
	214
	215	struct flow_cache_ops {
	216	struct flow_cache_object (get)(struct flow_cache_object *);
	217	int (check)(struct flow_cache_object );
	218	void (delete)(struct flow_cache_object );
	219	};
	220
	221	typedef struct flow_cache_object (flow_resolve_t)(
dee9f4bc	222	struct net net, const struct flowi key, u16 family,
fe1a5f03 TT	223	u8 dir, struct flow_cache_object oldobj, void ctx);
fe1a5f03 TT	224
4787342c JP	225	struct flow_cache_object flow_cache_lookup(struct net net,
	226	const struct flowi *key, u16 family,
	227	u8 dir, flow_resolve_t resolver,
	228	void *ctx);
ca925cf1	229	int flow_cache_init(struct net *net);
4a93f509	230	void flow_cache_fini(struct net *net);
1da177e4	231
ca925cf1 FD	232	void flow_cache_flush(struct net *net);
ca925cf1 FD	233	void flow_cache_flush_deferred(struct net *net);
1da177e4 LT	234	extern atomic_t flow_cache_genid;
	235
	236	#endif