[linux-block.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 {
	int	oif;
	int	iif;

	union {
		struct {
			__be32			daddr;
			__be32			saddr;
			__u32			fwmark;
			__u8			tos;
			__u8			scope;
		} ip4_u;
		
		struct {
			struct in6_addr		daddr;
			struct in6_addr		saddr;
			__u32			fwmark;
			__u32			flowlabel;
		} ip6_u;

		struct {
			__le16			daddr;
			__le16			saddr;
			__u32			fwmark;
			__u8			scope;
		} dn_u;
	} nl_u;
#define fld_dst		nl_u.dn_u.daddr
#define fld_src		nl_u.dn_u.saddr
#define fld_fwmark	nl_u.dn_u.fwmark
#define fld_scope	nl_u.dn_u.scope
#define fl6_dst		nl_u.ip6_u.daddr
#define fl6_src		nl_u.ip6_u.saddr
#define fl6_fwmark	nl_u.ip6_u.fwmark
#define fl6_flowlabel	nl_u.ip6_u.flowlabel
#define fl4_dst		nl_u.ip4_u.daddr
#define fl4_src		nl_u.ip4_u.saddr
#define fl4_fwmark	nl_u.ip4_u.fwmark
#define fl4_tos		nl_u.ip4_u.tos
#define fl4_scope	nl_u.ip4_u.scope

	__u8	proto;
	__u8	flags;
#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
	union {
		struct {
			__be16	sport;
			__be16	dport;
		} ports;

		struct {
			__u8	type;
			__u8	code;
		} icmpt;

		struct {
			__le16	sport;
			__le16	dport;
			__u8	objnum;
			__u8	objnamel; /* Not 16 bits since max val is 16 */
			__u8	objname[16]; /* Not zero terminated */
		} dnports;

		__be32		spi;

#ifdef CONFIG_IPV6_MIP6
		struct {
			__u8	type;
		} mht;
#endif
	} uli_u;
#define fl_ip_sport	uli_u.ports.sport
#define fl_ip_dport	uli_u.ports.dport
#define fl_icmp_type	uli_u.icmpt.type
#define fl_icmp_code	uli_u.icmpt.code
#define fl_ipsec_spi	uli_u.spi
#ifdef CONFIG_IPV6_MIP6
#define fl_mh_type	uli_u.mht.type
#endif
	__u32           secid;	/* used by xfrm; see secid.txt */
} __attribute__((__aligned__(BITS_PER_LONG/8)));

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

struct sock;
typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
			       void **objp, atomic_t **obj_refp);

extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
	 		       flow_resolve_t resolver);
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
	13	struct flowi {
	14	int oif;
	15	int iif;
	16
	17	union {
	18	struct {
f2c3fe24 AV	19	__be32 daddr;
f2c3fe24 AV	20	__be32 saddr;
1da177e4 LT	21	__u32 fwmark;
	22	__u8 tos;
	23	__u8 scope;
	24	} ip4_u;
	25
	26	struct {
	27	struct in6_addr daddr;
	28	struct in6_addr saddr;
75bff8f0	29	__u32 fwmark;
1da177e4 LT	30	__u32 flowlabel;
	31	} ip6_u;
	32
	33	struct {
c4ea94ab SW	34	__le16 daddr;
c4ea94ab SW	35	__le16 saddr;
1da177e4 LT	36	__u32 fwmark;
	37	__u8 scope;
	38	} dn_u;
	39	} nl_u;
	40	#define fld_dst nl_u.dn_u.daddr
	41	#define fld_src nl_u.dn_u.saddr
	42	#define fld_fwmark nl_u.dn_u.fwmark
	43	#define fld_scope nl_u.dn_u.scope
	44	#define fl6_dst nl_u.ip6_u.daddr
	45	#define fl6_src nl_u.ip6_u.saddr
75bff8f0	46	#define fl6_fwmark nl_u.ip6_u.fwmark
1da177e4 LT	47	#define fl6_flowlabel nl_u.ip6_u.flowlabel
	48	#define fl4_dst nl_u.ip4_u.daddr
	49	#define fl4_src nl_u.ip4_u.saddr
	50	#define fl4_fwmark nl_u.ip4_u.fwmark
	51	#define fl4_tos nl_u.ip4_u.tos
	52	#define fl4_scope nl_u.ip4_u.scope
	53
	54	__u8 proto;
	55	__u8 flags;
	56	#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
	57	union {
	58	struct {
cc939d37 AV	59	__be16 sport;
cc939d37 AV	60	__be16 dport;
1da177e4 LT	61	} ports;
	62
	63	struct {
	64	__u8 type;
	65	__u8 code;
	66	} icmpt;
	67
	68	struct {
c4ea94ab SW	69	__le16 sport;
c4ea94ab SW	70	__le16 dport;
1da177e4 LT	71	__u8 objnum;
	72	__u8 objnamel; /* Not 16 bits since max val is 16 */
	73	__u8 objname[16]; /* Not zero terminated */
	74	} dnports;
	75
4324a174	76	__be32 spi;
2b741653 MN	77
	78	#ifdef CONFIG_IPV6_MIP6
	79	struct {
	80	__u8 type;
	81	} mht;
	82	#endif
1da177e4 LT	83	} uli_u;
	84	#define fl_ip_sport uli_u.ports.sport
	85	#define fl_ip_dport uli_u.ports.dport
	86	#define fl_icmp_type uli_u.icmpt.type
	87	#define fl_icmp_code uli_u.icmpt.code
	88	#define fl_ipsec_spi uli_u.spi
2b741653 MN	89	#ifdef CONFIG_IPV6_MIP6
	90	#define fl_mh_type uli_u.mht.type
	91	#endif
b6340fcd	92	__u32 secid; /* used by xfrm; see secid.txt */
1da177e4 LT	93	} __attribute__((__aligned__(BITS_PER_LONG/8)));
	94
	95	#define FLOW_DIR_IN 0
	96	#define FLOW_DIR_OUT 1
	97	#define FLOW_DIR_FWD 2
	98
df71837d	99	struct sock;
134b0fc5	100	typedef int (flow_resolve_t)(struct flowi key, u16 family, u8 dir,
1da177e4 LT	101	void objp, atomic_t obj_refp);
1da177e4 LT	102
e0d1caa7	103	extern void flow_cache_lookup(struct flowi key, u16 family, u8 dir,
df71837d	104	flow_resolve_t resolver);
1da177e4 LT	105	extern void flow_cache_flush(void);
	106	extern atomic_t flow_cache_genid;
	107
	108	#endif