LXR linux/include/uapi/linux/nexthop.h

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef _UAPI_LINUX_NEXTHOP_H
   3#define _UAPI_LINUX_NEXTHOP_H
   4
   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    resvd1;
  20        __u16   resvd2;
  21};
  22
  23enum {
  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
  33enum {
  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
  68enum {
  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
  87enum {
  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
 105