1 files changed, 157 insertions, 0 deletions
diff --git a/include/uapi/linux/nexthop.h b/include/uapi/linux/nexthop.h
new file mode 100644
index 000000000000..bc49baf4a267
--- /dev/null
+++ b/include/uapi/linux/nexthop.h
@@ -0,0 +1,157 @@
+/* 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