Quelle nexthop.h Sprache: C

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_NEXTHOP_H
#define _UAPI_LINUX_NEXTHOP_H

#include <linux/types.h>

struct nhmsg {
unsigned char nh_family;
unsigned char nh_scope;     /* return only */
unsigned char nh_protocol;  /* Routing protocol that installed nh */
unsigned char resvd;
unsigned int nh_flags;     /* RTNH_F flags */
};

/* entry in a nexthop group */
struct nexthop_grp {
__u32 id;   /* nexthop id - must exist */
__u8 weight;   /* weight of this nexthop */
__u8 weight_high; /* high order bits of weight */
__u16 resvd2;
};

static inline __u16 nexthop_grp_weight(const struct nexthop_grp *entry)
{
return ((entry->weight_high << 8) | entry->weight) + 1;
}

enum {
NEXTHOP_GRP_TYPE_MPATH,  /* hash-threshold nexthop group
  * default type if not specified
  */
NEXTHOP_GRP_TYPE_RES,    /* resilient nexthop group */
__NEXTHOP_GRP_TYPE_MAX,
};

#define NEXTHOP_GRP_TYPE_MAX (__NEXTHOP_GRP_TYPE_MAX - 1)

#define NHA_OP_FLAG_DUMP_STATS  BIT(0)
#define NHA_OP_FLAG_DUMP_HW_STATS BIT(1)

/* Response OP_FLAGS. */
#define NHA_OP_FLAG_RESP_GRP_RESVD_0 BIT(31) /* Dump clears resvd fields. */

enum {
NHA_UNSPEC,
NHA_ID,  /* u32; id for nexthop. id == 0 means auto-assign */

NHA_GROUP, /* array of nexthop_grp */
NHA_GROUP_TYPE, /* u16 one of NEXTHOP_GRP_TYPE */
/* if NHA_GROUP attribute is added, no other attributes can be set */

NHA_BLACKHOLE, /* flag; nexthop used to blackhole packets */
/* if NHA_BLACKHOLE is added, OIF, GATEWAY, ENCAP can not be set */

NHA_OIF, /* u32; nexthop device */
NHA_GATEWAY, /* be32 (IPv4) or in6_addr (IPv6) gw address */
NHA_ENCAP_TYPE, /* u16; lwt encap type */
NHA_ENCAP, /* lwt encap data */

/* NHA_OIF can be appended to dump request to return only
* nexthops using given device
*/
NHA_GROUPS, /* flag; only return nexthop groups in dump */
NHA_MASTER, /* u32;  only return nexthops with given master dev */

NHA_FDB, /* flag; nexthop belongs to a bridge fdb */
/* if NHA_FDB is added, OIF, BLACKHOLE, ENCAP cannot be set */

/* nested; resilient nexthop group attributes */
NHA_RES_GROUP,
/* nested; nexthop bucket attributes */
NHA_RES_BUCKET,

/* u32; operation-specific flags */
NHA_OP_FLAGS,

/* nested; nexthop group stats */
NHA_GROUP_STATS,

/* u32; nexthop hardware stats enable */
NHA_HW_STATS_ENABLE,

/* u32; read-only; whether any driver collects HW stats */
NHA_HW_STATS_USED,

__NHA_MAX,
};

#define NHA_MAX (__NHA_MAX - 1)

enum {
NHA_RES_GROUP_UNSPEC,
/* Pad attribute for 64-bit alignment. */
NHA_RES_GROUP_PAD = NHA_RES_GROUP_UNSPEC,

/* u16; number of nexthop buckets in a resilient nexthop group */
NHA_RES_GROUP_BUCKETS,
/* clock_t as u32; nexthop bucket idle timer (per-group) */
NHA_RES_GROUP_IDLE_TIMER,
/* clock_t as u32; nexthop unbalanced timer */
NHA_RES_GROUP_UNBALANCED_TIMER,
/* clock_t as u64; nexthop unbalanced time */
NHA_RES_GROUP_UNBALANCED_TIME,

__NHA_RES_GROUP_MAX,
};

#define NHA_RES_GROUP_MAX (__NHA_RES_GROUP_MAX - 1)

enum {
NHA_RES_BUCKET_UNSPEC,
/* Pad attribute for 64-bit alignment. */
NHA_RES_BUCKET_PAD = NHA_RES_BUCKET_UNSPEC,

/* u16; nexthop bucket index */
NHA_RES_BUCKET_INDEX,
/* clock_t as u64; nexthop bucket idle time */
NHA_RES_BUCKET_IDLE_TIME,
/* u32; nexthop id assigned to the nexthop bucket */
NHA_RES_BUCKET_NH_ID,

__NHA_RES_BUCKET_MAX,
};

#define NHA_RES_BUCKET_MAX (__NHA_RES_BUCKET_MAX - 1)

enum {
NHA_GROUP_STATS_UNSPEC,

/* nested; nexthop group entry stats */
NHA_GROUP_STATS_ENTRY,

__NHA_GROUP_STATS_MAX,
};

#define NHA_GROUP_STATS_MAX (__NHA_GROUP_STATS_MAX - 1)

enum {
NHA_GROUP_STATS_ENTRY_UNSPEC,

/* u32; nexthop id of the nexthop group entry */
NHA_GROUP_STATS_ENTRY_ID,

/* uint; number of packets forwarded via the nexthop group entry */
NHA_GROUP_STATS_ENTRY_PACKETS,

/* uint; number of packets forwarded via the nexthop group entry in
* hardware
*/
NHA_GROUP_STATS_ENTRY_PACKETS_HW,

__NHA_GROUP_STATS_ENTRY_MAX,
};

#define NHA_GROUP_STATS_ENTRY_MAX (__NHA_GROUP_STATS_ENTRY_MAX - 1)

#endif

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