[linux-block.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>
#include <net/flow_dissector.h>
#include <linux/uidgid.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_SKIP_NH_OIF		0x04
	__u32	flowic_secid;
	struct flowi_tunnel flowic_tun_key;
	kuid_t  flowic_uid;
};

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
#define flowi4_uid		__fl_common.flowic_uid

	/* (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,
				      kuid_t uid)
{
	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->flowi4_uid = uid;
	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
#define flowi6_uid		__fl_common.flowic_uid
	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
	__u32			mp_hash;
} __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
#define flowi_uid	u.__fl_common.flowic_uid
} __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 unsigned int 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;
}

__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
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>
c6cc1ca7	13	#include <net/flow_dissector.h>
622ec2c9	14	#include <linux/uidgid.h>
1da177e4	15
6a662719 CW	16	/*
	17	* ifindex generation is per-net namespace, and loopback is
	18	* always the 1st device in ns (see net_dev_init), thus any
	19	* loopback device should get ifindex 1
	20	*/
	21
	22	#define LOOPBACK_IFINDEX 1
	23
1b7179d3 TG	24	struct flowi_tunnel {
	25	__be64 tun_id;
	26	};
	27
806566cc DM	28	struct flowi_common {
	29	int flowic_oif;
	30	int flowic_iif;
	31	__u32 flowic_mark;
	32	__u8 flowic_tos;
	33	__u8 flowic_scope;
	34	__u8 flowic_proto;
	35	__u8 flowic_flags;
fbef0a40	36	#define FLOWI_FLAG_ANYSRC 0x01
0e0d44ab	37	#define FLOWI_FLAG_KNOWN_NH 0x02
c71ad3d4	38	#define FLOWI_FLAG_SKIP_NH_OIF 0x04
806566cc	39	__u32 flowic_secid;
1b7179d3	40	struct flowi_tunnel flowic_tun_key;
622ec2c9	41	kuid_t flowic_uid;
806566cc DM	42	};
806566cc DM	43
08704bcb DM	44	union flowi_uli {
08704bcb DM	45	struct {
08704bcb	46	__be16 dport;
9b12c75b	47	__be16 sport;
08704bcb DM	48	} ports;
	49
	50	struct {
	51	__u8 type;
	52	__u8 code;
	53	} icmpt;
	54
	55	struct {
08704bcb	56	__le16 dport;
9b12c75b	57	__le16 sport;
08704bcb DM	58	} dnports;
	59
	60	__be32 spi;
	61	__be32 gre_key;
	62
	63	struct {
	64	__u8 type;
	65	} mht;
	66	};
	67
56bb8059 DM	68	struct flowi4 {
56bb8059 DM	69	struct flowi_common __fl_common;
22bd5b9b DM	70	#define flowi4_oif __fl_common.flowic_oif
	71	#define flowi4_iif __fl_common.flowic_iif
	72	#define flowi4_mark __fl_common.flowic_mark
	73	#define flowi4_tos __fl_common.flowic_tos
	74	#define flowi4_scope __fl_common.flowic_scope
	75	#define flowi4_proto __fl_common.flowic_proto
	76	#define flowi4_flags __fl_common.flowic_flags
	77	#define flowi4_secid __fl_common.flowic_secid
1b7179d3	78	#define flowi4_tun_key __fl_common.flowic_tun_key
622ec2c9	79	#define flowi4_uid __fl_common.flowic_uid
84f9307c ED	80
84f9307c ED	81	/* (saddr,daddr) must be grouped, same order as in IP header */
56bb8059	82	__be32 saddr;
84f9307c ED	83	__be32 daddr;
84f9307c ED	84
56bb8059	85	union flowi_uli uli;
9cce96df DM	86	#define fl4_sport uli.ports.sport
	87	#define fl4_dport uli.ports.dport
	88	#define fl4_icmp_type uli.icmpt.type
	89	#define fl4_icmp_code uli.icmpt.code
	90	#define fl4_ipsec_spi uli.spi
	91	#define fl4_mh_type uli.mht.type
	92	#define fl4_gre_key uli.gre_key
728871bc	93	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059	94
83229aa5 DM	95	static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
	96	__u32 mark, __u8 tos, __u8 scope,
	97	__u8 proto, __u8 flags,
	98	__be32 daddr, __be32 saddr,
e2d118a1 LC	99	__be16 dport, __be16 sport,
e2d118a1 LC	100	kuid_t uid)
83229aa5 DM	101	{
83229aa5 DM	102	fl4->flowi4_oif = oif;
6a662719	103	fl4->flowi4_iif = LOOPBACK_IFINDEX;
83229aa5 DM	104	fl4->flowi4_mark = mark;
	105	fl4->flowi4_tos = tos;
	106	fl4->flowi4_scope = scope;
	107	fl4->flowi4_proto = proto;
	108	fl4->flowi4_flags = flags;
	109	fl4->flowi4_secid = 0;
1b7179d3	110	fl4->flowi4_tun_key.tun_id = 0;
e2d118a1	111	fl4->flowi4_uid = uid;
83229aa5 DM	112	fl4->daddr = daddr;
83229aa5 DM	113	fl4->saddr = saddr;
83229aa5	114	fl4->fl4_dport = dport;
9b12c75b	115	fl4->fl4_sport = sport;
83229aa5	116	}
e6b45241 JA	117
	118	/* Reset some input parameters after previous lookup */
	119	static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
	120	__be32 daddr, __be32 saddr)
	121	{
	122	fl4->flowi4_oif = oif;
	123	fl4->flowi4_tos = tos;
	124	fl4->daddr = daddr;
	125	fl4->saddr = saddr;
	126	}
83229aa5 DM	127
83229aa5 DM	128
56bb8059	129	struct flowi6 {
806566cc	130	struct flowi_common __fl_common;
2032656e DM	131	#define flowi6_oif __fl_common.flowic_oif
	132	#define flowi6_iif __fl_common.flowic_iif
	133	#define flowi6_mark __fl_common.flowic_mark
2032656e DM	134	#define flowi6_scope __fl_common.flowic_scope
	135	#define flowi6_proto __fl_common.flowic_proto
	136	#define flowi6_flags __fl_common.flowic_flags
	137	#define flowi6_secid __fl_common.flowic_secid
904af04d	138	#define flowi6_tun_key __fl_common.flowic_tun_key
622ec2c9	139	#define flowi6_uid __fl_common.flowic_uid
56bb8059 DM	140	struct in6_addr daddr;
56bb8059 DM	141	struct in6_addr saddr;
69716a2b	142	/* Note: flowi6_tos is encoded in flowlabel, too. */
56bb8059 DM	143	__be32 flowlabel;
56bb8059 DM	144	union flowi_uli uli;
1958b856 DM	145	#define fl6_sport uli.ports.sport
	146	#define fl6_dport uli.ports.dport
	147	#define fl6_icmp_type uli.icmpt.type
	148	#define fl6_icmp_code uli.icmpt.code
	149	#define fl6_ipsec_spi uli.spi
	150	#define fl6_mh_type uli.mht.type
	151	#define fl6_gre_key uli.gre_key
29825717	152	__u32 mp_hash;
728871bc	153	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4	154
56bb8059 DM	155	struct flowidn {
56bb8059 DM	156	struct flowi_common __fl_common;
bef55aeb DM	157	#define flowidn_oif __fl_common.flowic_oif
	158	#define flowidn_iif __fl_common.flowic_iif
	159	#define flowidn_mark __fl_common.flowic_mark
	160	#define flowidn_scope __fl_common.flowic_scope
	161	#define flowidn_proto __fl_common.flowic_proto
	162	#define flowidn_flags __fl_common.flowic_flags
56bb8059 DM	163	__le16 daddr;
	164	__le16 saddr;
	165	union flowi_uli uli;
bef55aeb DM	166	#define fld_sport uli.ports.sport
bef55aeb DM	167	#define fld_dport uli.ports.dport
728871bc	168	} __attribute__((__aligned__(BITS_PER_LONG/8)));
56bb8059 DM	169
56bb8059 DM	170	struct flowi {
1da177e4	171	union {
56bb8059 DM	172	struct flowi_common __fl_common;
	173	struct flowi4 ip4;
	174	struct flowi6 ip6;
	175	struct flowidn dn;
	176	} u;
	177	#define flowi_oif u.__fl_common.flowic_oif
	178	#define flowi_iif u.__fl_common.flowic_iif
	179	#define flowi_mark u.__fl_common.flowic_mark
	180	#define flowi_tos u.__fl_common.flowic_tos
	181	#define flowi_scope u.__fl_common.flowic_scope
	182	#define flowi_proto u.__fl_common.flowic_proto
	183	#define flowi_flags u.__fl_common.flowic_flags
	184	#define flowi_secid u.__fl_common.flowic_secid
1b7179d3	185	#define flowi_tun_key u.__fl_common.flowic_tun_key
622ec2c9	186	#define flowi_uid u.__fl_common.flowic_uid
1da177e4 LT	187	} __attribute__((__aligned__(BITS_PER_LONG/8)));
1da177e4 LT	188
59b1a94c DM	189	static inline struct flowi flowi4_to_flowi(struct flowi4 fl4)
	190	{
	191	return container_of(fl4, struct flowi, u.ip4);
	192	}
	193
	194	static inline struct flowi flowi6_to_flowi(struct flowi6 fl6)
	195	{
	196	return container_of(fl6, struct flowi, u.ip6);
	197	}
	198
	199	static inline struct flowi flowidn_to_flowi(struct flowidn fldn)
	200	{
	201	return container_of(fldn, struct flowi, u.dn);
	202	}
	203
aa1c366e	204	typedef unsigned long flow_compare_t;
aa1c366e	205
5a17d9ed	206	static inline unsigned int flow_key_size(u16 family)
aa1c366e	207	{
	208	switch (family) {
	209	case AF_INET:
	210	BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
	211	return sizeof(struct flowi4) / sizeof(flow_compare_t);
	212	case AF_INET6:
	213	BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
	214	return sizeof(struct flowi6) / sizeof(flow_compare_t);
	215	case AF_DECnet:
	216	BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
	217	return sizeof(struct flowidn) / sizeof(flow_compare_t);
	218	}
	219	return 0;
	220	}
	221
20a17bf6	222	__u32 __get_hash_from_flowi6(const struct flowi6 fl6, struct flow_keys keys);
c6cc1ca7	223
20a17bf6	224	static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
c6cc1ca7 TH	225	{
	226	struct flow_keys keys;
	227
	228	return __get_hash_from_flowi6(fl6, &keys);
	229	}
	230
20a17bf6	231	__u32 __get_hash_from_flowi4(const struct flowi4 fl4, struct flow_keys keys);
c6cc1ca7	232
20a17bf6	233	static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
c6cc1ca7 TH	234	{
	235	struct flow_keys keys;
	236
	237	return __get_hash_from_flowi4(fl4, &keys);
	238	}
	239
1da177e4	240	#endif