158 lines · c
1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef _UAPI_LINUX_NEXTHOP_H3#define _UAPI_LINUX_NEXTHOP_H4 5#include <linux/types.h>6 7struct nhmsg {8 unsigned char nh_family;9 unsigned char nh_scope; /* return only */10 unsigned char nh_protocol; /* Routing protocol that installed nh */11 unsigned char resvd;12 unsigned int nh_flags; /* RTNH_F flags */13};14 15/* entry in a nexthop group */16struct nexthop_grp {17 __u32 id; /* nexthop id - must exist */18 __u8 weight; /* weight of this nexthop */19 __u8 weight_high; /* high order bits of weight */20 __u16 resvd2;21};22 23static inline __u16 nexthop_grp_weight(const struct nexthop_grp *entry)24{25 return ((entry->weight_high << 8) | entry->weight) + 1;26}27 28enum {29 NEXTHOP_GRP_TYPE_MPATH, /* hash-threshold nexthop group30 * default type if not specified31 */32 NEXTHOP_GRP_TYPE_RES, /* resilient nexthop group */33 __NEXTHOP_GRP_TYPE_MAX,34};35 36#define NEXTHOP_GRP_TYPE_MAX (__NEXTHOP_GRP_TYPE_MAX - 1)37 38#define NHA_OP_FLAG_DUMP_STATS BIT(0)39#define NHA_OP_FLAG_DUMP_HW_STATS BIT(1)40 41/* Response OP_FLAGS. */42#define NHA_OP_FLAG_RESP_GRP_RESVD_0 BIT(31) /* Dump clears resvd fields. */43 44enum {45 NHA_UNSPEC,46 NHA_ID, /* u32; id for nexthop. id == 0 means auto-assign */47 48 NHA_GROUP, /* array of nexthop_grp */49 NHA_GROUP_TYPE, /* u16 one of NEXTHOP_GRP_TYPE */50 /* if NHA_GROUP attribute is added, no other attributes can be set */51 52 NHA_BLACKHOLE, /* flag; nexthop used to blackhole packets */53 /* if NHA_BLACKHOLE is added, OIF, GATEWAY, ENCAP can not be set */54 55 NHA_OIF, /* u32; nexthop device */56 NHA_GATEWAY, /* be32 (IPv4) or in6_addr (IPv6) gw address */57 NHA_ENCAP_TYPE, /* u16; lwt encap type */58 NHA_ENCAP, /* lwt encap data */59 60 /* NHA_OIF can be appended to dump request to return only61 * nexthops using given device62 */63 NHA_GROUPS, /* flag; only return nexthop groups in dump */64 NHA_MASTER, /* u32; only return nexthops with given master dev */65 66 NHA_FDB, /* flag; nexthop belongs to a bridge fdb */67 /* if NHA_FDB is added, OIF, BLACKHOLE, ENCAP cannot be set */68 69 /* nested; resilient nexthop group attributes */70 NHA_RES_GROUP,71 /* nested; nexthop bucket attributes */72 NHA_RES_BUCKET,73 74 /* u32; operation-specific flags */75 NHA_OP_FLAGS,76 77 /* nested; nexthop group stats */78 NHA_GROUP_STATS,79 80 /* u32; nexthop hardware stats enable */81 NHA_HW_STATS_ENABLE,82 83 /* u32; read-only; whether any driver collects HW stats */84 NHA_HW_STATS_USED,85 86 __NHA_MAX,87};88 89#define NHA_MAX (__NHA_MAX - 1)90 91enum {92 NHA_RES_GROUP_UNSPEC,93 /* Pad attribute for 64-bit alignment. */94 NHA_RES_GROUP_PAD = NHA_RES_GROUP_UNSPEC,95 96 /* u16; number of nexthop buckets in a resilient nexthop group */97 NHA_RES_GROUP_BUCKETS,98 /* clock_t as u32; nexthop bucket idle timer (per-group) */99 NHA_RES_GROUP_IDLE_TIMER,100 /* clock_t as u32; nexthop unbalanced timer */101 NHA_RES_GROUP_UNBALANCED_TIMER,102 /* clock_t as u64; nexthop unbalanced time */103 NHA_RES_GROUP_UNBALANCED_TIME,104 105 __NHA_RES_GROUP_MAX,106};107 108#define NHA_RES_GROUP_MAX (__NHA_RES_GROUP_MAX - 1)109 110enum {111 NHA_RES_BUCKET_UNSPEC,112 /* Pad attribute for 64-bit alignment. */113 NHA_RES_BUCKET_PAD = NHA_RES_BUCKET_UNSPEC,114 115 /* u16; nexthop bucket index */116 NHA_RES_BUCKET_INDEX,117 /* clock_t as u64; nexthop bucket idle time */118 NHA_RES_BUCKET_IDLE_TIME,119 /* u32; nexthop id assigned to the nexthop bucket */120 NHA_RES_BUCKET_NH_ID,121 122 __NHA_RES_BUCKET_MAX,123};124 125#define NHA_RES_BUCKET_MAX (__NHA_RES_BUCKET_MAX - 1)126 127enum {128 NHA_GROUP_STATS_UNSPEC,129 130 /* nested; nexthop group entry stats */131 NHA_GROUP_STATS_ENTRY,132 133 __NHA_GROUP_STATS_MAX,134};135 136#define NHA_GROUP_STATS_MAX (__NHA_GROUP_STATS_MAX - 1)137 138enum {139 NHA_GROUP_STATS_ENTRY_UNSPEC,140 141 /* u32; nexthop id of the nexthop group entry */142 NHA_GROUP_STATS_ENTRY_ID,143 144 /* uint; number of packets forwarded via the nexthop group entry */145 NHA_GROUP_STATS_ENTRY_PACKETS,146 147 /* uint; number of packets forwarded via the nexthop group entry in148 * hardware149 */150 NHA_GROUP_STATS_ENTRY_PACKETS_HW,151 152 __NHA_GROUP_STATS_ENTRY_MAX,153};154 155#define NHA_GROUP_STATS_ENTRY_MAX (__NHA_GROUP_STATS_ENTRY_MAX - 1)156 157#endif158