include, zebra: Add recent nexthop.h

Add actual recent nexthop.h file from kernel
and fix up resulting fallout because FRR's
original nexthop.h did not match upstream
linux kernel.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

include/linux/nexthop.h

@@ -1,12 +1,9 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _LINUX_NEXTHOP_H
-#define _LINUX_NEXTHOP_H
+#ifndef _UAPI_LINUX_NEXTHOP_H
+#define _UAPI_LINUX_NEXTHOP_H
 
 #include <linux/types.h>
 
-#define RTM_NHA(h)  ((struct rtattr *)(((char *)(h)) + \
-			NLMSG_ALIGN(sizeof(struct nhmsg))))
-
 struct nhmsg {
 	unsigned char	nh_family;
 	unsigned char	nh_scope;     /* return only */
@@ -15,6 +12,7 @@ struct nhmsg {
 	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 */
@@ -23,7 +21,10 @@ struct nexthop_grp {
 };
 
 enum {
-	NEXTHOP_GRP_TYPE_MPATH,  /* default type if not specified */
+	NEXTHOP_GRP_TYPE_MPATH,  /* hash-threshold nexthop group
+				  * default type if not specified
+				  */
+	NEXTHOP_GRP_TYPE_RES,    /* resilient nexthop group */
 	__NEXTHOP_GRP_TYPE_MAX,
 };
 
@@ -50,10 +51,54 @@ enum {
 	 */
 	NHA_GROUPS,	/* flag; only return nexthop groups in dump */
 	NHA_MASTER,	/* u32;  only return nexthops with given master dev */
-	NHA_FDB,	/* nexthop belongs to a bridge fdb */
+
+	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,
 
 	__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)
+
 #endif

zebra/debug_nl.c

@@ -29,6 +29,7 @@
 #include <stdint.h>
 
 #include "zebra/rt_netlink.h"
+#include "zebra/kernel_netlink.h"
 
 const char *nlmsg_type2str(uint16_t type)
 {

zebra/kernel_netlink.h

@@ -27,6 +27,10 @@ extern "C" {
 
 #ifdef HAVE_NETLINK
 
+#define RTM_NHA(h)                                                             \
+	((struct rtattr *)(((char *)(h)) + NLMSG_ALIGN(sizeof(struct nhmsg))))
+
+
 #define NL_RCV_PKT_BUF_SIZE     32768
 #define NL_PKT_BUF_SIZE         8192