nexthop.h (4065B) - Raw
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _LINUX_NEXTHOP_H 3 #define _LINUX_NEXTHOP_H 4 5 #include <linux/types.h> 6 7 struct 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 */ 16 struct 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 23 static __inline__ __u16 nexthop_grp_weight(const struct nexthop_grp *entry) 24 { 25 return ((entry->weight_high << 8) | entry->weight) + 1; 26 } 27 28 enum { 29 NEXTHOP_GRP_TYPE_MPATH, /* hash-threshold nexthop group 30 * default type if not specified 31 */ 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 44 enum { 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 only 61 * nexthops using given device 62 */ 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 91 enum { 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) 109 110 enum { 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) 126 127 enum { 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) 137 138 enum { 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 in 148 * hardware 149 */ 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 #endif