net: nexthop: Add hardware statistics notifications

JIRA: https://issues.redhat.com/browse/RHEL-59118

commit 5877786
Author: Ido Schimmel <idosch@nvidia.com>
Date:   Wed Mar 6 13:49:19 2024 +0100

    net: nexthop: Add hardware statistics notifications

    Add hw_stats field to several notifier structures to communicate to the
    drivers that HW statistics should be configured for nexthops within a given
    group.

    Signed-off-by: Ido Schimmel <idosch@nvidia.com>
    Reviewed-by: David Ahern <dsahern@kernel.org>
    Signed-off-by: Petr Machata <petrm@nvidia.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Ivan Vecera <ivecera@redhat.com>

Author: ivecera

include/net/nexthop.h

@@ -132,6 +132,7 @@ struct nh_group {
 	bool			resilient;
 	bool			fdb_nh;
 	bool			has_v4;
+	bool			hw_stats;
 
 	RH_KABI_RESERVE(1)
 	RH_KABI_RESERVE(2)
@@ -198,6 +199,7 @@ struct nh_notifier_grp_entry_info {
 struct nh_notifier_grp_info {
 	u16 num_nh;
 	bool is_fdb;
+	bool hw_stats;
 	struct nh_notifier_grp_entry_info nh_entries[] __counted_by(num_nh);
 };
 
@@ -211,6 +213,7 @@ struct nh_notifier_res_bucket_info {
 
 struct nh_notifier_res_table_info {
 	u16 num_nh_buckets;
+	bool hw_stats;
 	struct nh_notifier_single_info nhs[] __counted_by(num_nh_buckets);
 };
 

net/ipv4/nexthop.c

@@ -141,6 +141,7 @@ static int nh_notifier_mpath_info_init(struct nh_notifier_info *info,
 
 	info->nh_grp->num_nh = num_nh;
 	info->nh_grp->is_fdb = nhg->fdb_nh;
+	info->nh_grp->hw_stats = nhg->hw_stats;
 
 	for (i = 0; i < num_nh; i++) {
 		struct nh_grp_entry *nhge = &nhg->nh_entries[i];
@@ -172,6 +173,7 @@ static int nh_notifier_res_table_info_init(struct nh_notifier_info *info,
 		return -ENOMEM;
 
 	info->nh_res_table->num_nh_buckets = num_nh_buckets;
+	info->nh_res_table->hw_stats = nhg->hw_stats;
 
 	for (i = 0; i < num_nh_buckets; i++) {
 		struct nh_res_bucket *bucket = &res_table->nh_buckets[i];