linux-headers (unknown)
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 resvd1;
20 __u16 resvd2;
21 };
22
23 enum {
24 NEXTHOP_GRP_TYPE_MPATH, /* hash-threshold nexthop group
25 * default type if not specified
26 */
27 NEXTHOP_GRP_TYPE_RES, /* resilient nexthop group */
28 __NEXTHOP_GRP_TYPE_MAX,
29 };
30
31 #define NEXTHOP_GRP_TYPE_MAX (__NEXTHOP_GRP_TYPE_MAX - 1)
32
33 enum {
34 NHA_UNSPEC,
35 NHA_ID, /* u32; id for nexthop. id == 0 means auto-assign */
36
37 NHA_GROUP, /* array of nexthop_grp */
38 NHA_GROUP_TYPE, /* u16 one of NEXTHOP_GRP_TYPE */
39 /* if NHA_GROUP attribute is added, no other attributes can be set */
40
41 NHA_BLACKHOLE, /* flag; nexthop used to blackhole packets */
42 /* if NHA_BLACKHOLE is added, OIF, GATEWAY, ENCAP can not be set */
43
44 NHA_OIF, /* u32; nexthop device */
45 NHA_GATEWAY, /* be32 (IPv4) or in6_addr (IPv6) gw address */
46 NHA_ENCAP_TYPE, /* u16; lwt encap type */
47 NHA_ENCAP, /* lwt encap data */
48
49 /* NHA_OIF can be appended to dump request to return only
50 * nexthops using given device
51 */
52 NHA_GROUPS, /* flag; only return nexthop groups in dump */
53 NHA_MASTER, /* u32; only return nexthops with given master dev */
54
55 NHA_FDB, /* flag; nexthop belongs to a bridge fdb */
56 /* if NHA_FDB is added, OIF, BLACKHOLE, ENCAP cannot be set */
57
58 /* nested; resilient nexthop group attributes */
59 NHA_RES_GROUP,
60 /* nested; nexthop bucket attributes */
61 NHA_RES_BUCKET,
62
63 __NHA_MAX,
64 };
65
66 #define NHA_MAX (__NHA_MAX - 1)
67
68 enum {
69 NHA_RES_GROUP_UNSPEC,
70 /* Pad attribute for 64-bit alignment. */
71 NHA_RES_GROUP_PAD = NHA_RES_GROUP_UNSPEC,
72
73 /* u16; number of nexthop buckets in a resilient nexthop group */
74 NHA_RES_GROUP_BUCKETS,
75 /* clock_t as u32; nexthop bucket idle timer (per-group) */
76 NHA_RES_GROUP_IDLE_TIMER,
77 /* clock_t as u32; nexthop unbalanced timer */
78 NHA_RES_GROUP_UNBALANCED_TIMER,
79 /* clock_t as u64; nexthop unbalanced time */
80 NHA_RES_GROUP_UNBALANCED_TIME,
81
82 __NHA_RES_GROUP_MAX,
83 };
84
85 #define NHA_RES_GROUP_MAX (__NHA_RES_GROUP_MAX - 1)
86
87 enum {
88 NHA_RES_BUCKET_UNSPEC,
89 /* Pad attribute for 64-bit alignment. */
90 NHA_RES_BUCKET_PAD = NHA_RES_BUCKET_UNSPEC,
91
92 /* u16; nexthop bucket index */
93 NHA_RES_BUCKET_INDEX,
94 /* clock_t as u64; nexthop bucket idle time */
95 NHA_RES_BUCKET_IDLE_TIME,
96 /* u32; nexthop id assigned to the nexthop bucket */
97 NHA_RES_BUCKET_NH_ID,
98
99 __NHA_RES_BUCKET_MAX,
100 };
101
102 #define NHA_RES_BUCKET_MAX (__NHA_RES_BUCKET_MAX - 1)
103
104 #endif
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