/* SPDX-License-Identifier: GPL-2.0 *//* * *	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;	int     flowic_l3mdev;	__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;	kuid_t  flowic_uid;	struct flowi_tunnel flowic_tun_key;	__u32		flowic_multipath_hash;}; union flowi_uli {	struct {		__be16	dport;		__be16	sport;	} ports; 	struct {		__u8	type;		__u8	code;	} icmpt; 	struct {		__le16	dport;		__le16	sport;	} dnports; 	__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_l3mdev		__fl_common.flowic_l3mdev#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#define flowi4_multipath_hash	__fl_common.flowic_multipath_hash 	/* (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_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_l3mdev = 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->flowi4_tun_key.tun_id = 0;	fl4->flowi4_uid = uid;	fl4->daddr = daddr;	fl4->saddr = saddr;	fl4->fl4_dport = dport;	fl4->fl4_sport = sport;	fl4->flowi4_multipath_hash = 0;} /* 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_l3mdev		__fl_common.flowic_l3mdev#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_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_l3mdev	u.__fl_common.flowic_l3mdev#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_common *flowi4_to_flowi_common(struct flowi4 *fl4){	return &(fl4->__fl_common);} static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6){	return container_of(fl6, struct flowi, u.ip6);} static inline struct flowi_common *flowi6_to_flowi_common(struct flowi6 *fl6){	return &(fl6->__fl_common);} static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn){	return container_of(fldn, struct flowi, u.dn);} __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys); #endif