| 1 | /* SPDX-License-Identifier: GPL-2.0 */ | 
|---|
| 2 | /* | 
|---|
| 3 | * | 
|---|
| 4 | *	Generic internet FLOW. | 
|---|
| 5 | * | 
|---|
| 6 | */ | 
|---|
| 7 |  | 
|---|
| 8 | #ifndef _NET_FLOW_H | 
|---|
| 9 | #define _NET_FLOW_H | 
|---|
| 10 |  | 
|---|
| 11 | #include <linux/in6.h> | 
|---|
| 12 | #include <linux/atomic.h> | 
|---|
| 13 | #include <linux/container_of.h> | 
|---|
| 14 | #include <linux/uidgid.h> | 
|---|
| 15 | #include <net/inet_dscp.h> | 
|---|
| 16 |  | 
|---|
| 17 | struct flow_keys; | 
|---|
| 18 |  | 
|---|
| 19 | /* | 
|---|
| 20 | * ifindex generation is per-net namespace, and loopback is | 
|---|
| 21 | * always the 1st device in ns (see net_dev_init), thus any | 
|---|
| 22 | * loopback device should get ifindex 1 | 
|---|
| 23 | */ | 
|---|
| 24 |  | 
|---|
| 25 | #define LOOPBACK_IFINDEX	1 | 
|---|
| 26 |  | 
|---|
| 27 | struct flowi_tunnel { | 
|---|
| 28 | __be64			tun_id; | 
|---|
| 29 | }; | 
|---|
| 30 |  | 
|---|
| 31 | struct flowi_common { | 
|---|
| 32 | int	flowic_oif; | 
|---|
| 33 | int	flowic_iif; | 
|---|
| 34 | int     flowic_l3mdev; | 
|---|
| 35 | __u32	flowic_mark; | 
|---|
| 36 | dscp_t	flowic_dscp; | 
|---|
| 37 | __u8	flowic_scope; | 
|---|
| 38 | __u8	flowic_proto; | 
|---|
| 39 | __u8	flowic_flags; | 
|---|
| 40 | #define FLOWI_FLAG_ANYSRC		0x01 | 
|---|
| 41 | #define FLOWI_FLAG_KNOWN_NH		0x02 | 
|---|
| 42 | #define FLOWI_FLAG_L3MDEV_OIF		0x04 | 
|---|
| 43 | #define FLOWI_FLAG_ANY_SPORT		0x08 | 
|---|
| 44 | __u32	flowic_secid; | 
|---|
| 45 | kuid_t  flowic_uid; | 
|---|
| 46 | __u32		flowic_multipath_hash; | 
|---|
| 47 | struct flowi_tunnel flowic_tun_key; | 
|---|
| 48 | }; | 
|---|
| 49 |  | 
|---|
| 50 | union flowi_uli { | 
|---|
| 51 | struct { | 
|---|
| 52 | __be16	dport; | 
|---|
| 53 | __be16	sport; | 
|---|
| 54 | } ports; | 
|---|
| 55 |  | 
|---|
| 56 | struct { | 
|---|
| 57 | __u8	type; | 
|---|
| 58 | __u8	code; | 
|---|
| 59 | } icmpt; | 
|---|
| 60 |  | 
|---|
| 61 | __be32		gre_key; | 
|---|
| 62 |  | 
|---|
| 63 | struct { | 
|---|
| 64 | __u8	type; | 
|---|
| 65 | } mht; | 
|---|
| 66 | }; | 
|---|
| 67 |  | 
|---|
| 68 | struct flowi4 { | 
|---|
| 69 | struct flowi_common	__fl_common; | 
|---|
| 70 | #define flowi4_oif		__fl_common.flowic_oif | 
|---|
| 71 | #define flowi4_iif		__fl_common.flowic_iif | 
|---|
| 72 | #define flowi4_l3mdev		__fl_common.flowic_l3mdev | 
|---|
| 73 | #define flowi4_mark		__fl_common.flowic_mark | 
|---|
| 74 | #define flowi4_dscp		__fl_common.flowic_dscp | 
|---|
| 75 | #define flowi4_scope		__fl_common.flowic_scope | 
|---|
| 76 | #define flowi4_proto		__fl_common.flowic_proto | 
|---|
| 77 | #define flowi4_flags		__fl_common.flowic_flags | 
|---|
| 78 | #define flowi4_secid		__fl_common.flowic_secid | 
|---|
| 79 | #define flowi4_tun_key		__fl_common.flowic_tun_key | 
|---|
| 80 | #define flowi4_uid		__fl_common.flowic_uid | 
|---|
| 81 | #define flowi4_multipath_hash	__fl_common.flowic_multipath_hash | 
|---|
| 82 |  | 
|---|
| 83 | /* (saddr,daddr) must be grouped, same order as in IP header */ | 
|---|
| 84 | __be32			saddr; | 
|---|
| 85 | __be32			daddr; | 
|---|
| 86 |  | 
|---|
| 87 | union flowi_uli		uli; | 
|---|
| 88 | #define fl4_sport		uli.ports.sport | 
|---|
| 89 | #define fl4_dport		uli.ports.dport | 
|---|
| 90 | #define fl4_icmp_type		uli.icmpt.type | 
|---|
| 91 | #define fl4_icmp_code		uli.icmpt.code | 
|---|
| 92 | #define fl4_mh_type		uli.mht.type | 
|---|
| 93 | #define fl4_gre_key		uli.gre_key | 
|---|
| 94 | } __attribute__((__aligned__(BITS_PER_LONG/8))); | 
|---|
| 95 |  | 
|---|
| 96 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, | 
|---|
| 97 | __u32 mark, __u8 tos, __u8 scope, | 
|---|
| 98 | __u8 proto, __u8 flags, | 
|---|
| 99 | __be32 daddr, __be32 saddr, | 
|---|
| 100 | __be16 dport, __be16 sport, | 
|---|
| 101 | kuid_t uid) | 
|---|
| 102 | { | 
|---|
| 103 | fl4->flowi4_oif = oif; | 
|---|
| 104 | fl4->flowi4_iif = LOOPBACK_IFINDEX; | 
|---|
| 105 | fl4->flowi4_l3mdev = 0; | 
|---|
| 106 | fl4->flowi4_mark = mark; | 
|---|
| 107 | fl4->flowi4_dscp = inet_dsfield_to_dscp(dsfield: tos); | 
|---|
| 108 | fl4->flowi4_scope = scope; | 
|---|
| 109 | fl4->flowi4_proto = proto; | 
|---|
| 110 | fl4->flowi4_flags = flags; | 
|---|
| 111 | fl4->flowi4_secid = 0; | 
|---|
| 112 | fl4->flowi4_tun_key.tun_id = 0; | 
|---|
| 113 | fl4->flowi4_uid = uid; | 
|---|
| 114 | fl4->daddr = daddr; | 
|---|
| 115 | fl4->saddr = saddr; | 
|---|
| 116 | fl4->fl4_dport = dport; | 
|---|
| 117 | fl4->fl4_sport = sport; | 
|---|
| 118 | fl4->flowi4_multipath_hash = 0; | 
|---|
| 119 | } | 
|---|
| 120 |  | 
|---|
| 121 | /* Reset some input parameters after previous lookup */ | 
|---|
| 122 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, | 
|---|
| 123 | __be32 daddr, __be32 saddr) | 
|---|
| 124 | { | 
|---|
| 125 | fl4->flowi4_oif = oif; | 
|---|
| 126 | fl4->daddr = daddr; | 
|---|
| 127 | fl4->saddr = saddr; | 
|---|
| 128 | } | 
|---|
| 129 |  | 
|---|
| 130 |  | 
|---|
| 131 | struct flowi6 { | 
|---|
| 132 | struct flowi_common	__fl_common; | 
|---|
| 133 | #define flowi6_oif		__fl_common.flowic_oif | 
|---|
| 134 | #define flowi6_iif		__fl_common.flowic_iif | 
|---|
| 135 | #define flowi6_l3mdev		__fl_common.flowic_l3mdev | 
|---|
| 136 | #define flowi6_mark		__fl_common.flowic_mark | 
|---|
| 137 | #define flowi6_scope		__fl_common.flowic_scope | 
|---|
| 138 | #define flowi6_proto		__fl_common.flowic_proto | 
|---|
| 139 | #define flowi6_flags		__fl_common.flowic_flags | 
|---|
| 140 | #define flowi6_secid		__fl_common.flowic_secid | 
|---|
| 141 | #define flowi6_tun_key		__fl_common.flowic_tun_key | 
|---|
| 142 | #define flowi6_uid		__fl_common.flowic_uid | 
|---|
| 143 | struct in6_addr		daddr; | 
|---|
| 144 | struct in6_addr		saddr; | 
|---|
| 145 | /* Note: flowi6_dscp is encoded in flowlabel, too. */ | 
|---|
| 146 | __be32			flowlabel; | 
|---|
| 147 | union flowi_uli		uli; | 
|---|
| 148 | #define fl6_sport		uli.ports.sport | 
|---|
| 149 | #define fl6_dport		uli.ports.dport | 
|---|
| 150 | #define fl6_icmp_type		uli.icmpt.type | 
|---|
| 151 | #define fl6_icmp_code		uli.icmpt.code | 
|---|
| 152 | #define fl6_mh_type		uli.mht.type | 
|---|
| 153 | #define fl6_gre_key		uli.gre_key | 
|---|
| 154 | __u32			mp_hash; | 
|---|
| 155 | } __attribute__((__aligned__(BITS_PER_LONG/8))); | 
|---|
| 156 |  | 
|---|
| 157 | struct flowi { | 
|---|
| 158 | union { | 
|---|
| 159 | struct flowi_common	__fl_common; | 
|---|
| 160 | struct flowi4		ip4; | 
|---|
| 161 | struct flowi6		ip6; | 
|---|
| 162 | } u; | 
|---|
| 163 | #define flowi_oif	u.__fl_common.flowic_oif | 
|---|
| 164 | #define flowi_iif	u.__fl_common.flowic_iif | 
|---|
| 165 | #define flowi_l3mdev	u.__fl_common.flowic_l3mdev | 
|---|
| 166 | #define flowi_mark	u.__fl_common.flowic_mark | 
|---|
| 167 | #define flowi_dscp	u.__fl_common.flowic_dscp | 
|---|
| 168 | #define flowi_scope	u.__fl_common.flowic_scope | 
|---|
| 169 | #define flowi_proto	u.__fl_common.flowic_proto | 
|---|
| 170 | #define flowi_flags	u.__fl_common.flowic_flags | 
|---|
| 171 | #define flowi_secid	u.__fl_common.flowic_secid | 
|---|
| 172 | #define flowi_tun_key	u.__fl_common.flowic_tun_key | 
|---|
| 173 | #define flowi_uid	u.__fl_common.flowic_uid | 
|---|
| 174 | } __attribute__((__aligned__(BITS_PER_LONG/8))); | 
|---|
| 175 |  | 
|---|
| 176 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) | 
|---|
| 177 | { | 
|---|
| 178 | return container_of(fl4, struct flowi, u.ip4); | 
|---|
| 179 | } | 
|---|
| 180 |  | 
|---|
| 181 | static inline struct flowi_common *flowi4_to_flowi_common(struct flowi4 *fl4) | 
|---|
| 182 | { | 
|---|
| 183 | return &(fl4->__fl_common); | 
|---|
| 184 | } | 
|---|
| 185 |  | 
|---|
| 186 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | 
|---|
| 187 | { | 
|---|
| 188 | return container_of(fl6, struct flowi, u.ip6); | 
|---|
| 189 | } | 
|---|
| 190 |  | 
|---|
| 191 | static inline struct flowi_common *flowi6_to_flowi_common(struct flowi6 *fl6) | 
|---|
| 192 | { | 
|---|
| 193 | return &(fl6->__fl_common); | 
|---|
| 194 | } | 
|---|
| 195 |  | 
|---|
| 196 | __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys); | 
|---|
| 197 |  | 
|---|
| 198 | #endif | 
|---|
| 199 |  | 
|---|