add eager link counters

2 files changed, 26 insertions, 0 deletions

diff --git a/src/api/stats.rs b/src/api/stats.rs
index 558507a..9ac2c94 100644
--- a/src/api/stats.rs
+++ b/src/api/stats.rs
@@ -140,6 +140,11 @@ struct RelayStats {
     pulls: u64,
     /// Announcements of heads we lacked that waited for the pull in progress.
     pulls_queued: u64,
+    /// Links made eager, and lazy again (`swarm::relay`).
+    grafts: u64,
+    prunes: u64,
+    /// Changes forwarded over eager links, per neighbour.
+    eager_forwards: u64,
     /// Blob requests not answered: too many were being answered.
     blob_requests_dropped: u64,
 }
@@ -340,6 +345,9 @@ pub(crate) async fn collect(state: &AppState, list: &PeerListResponse) -> StatsR
             announce_rounds: node.relay.announce_rounds,
             pulls: node.relay.pulls,
             pulls_queued: node.relay.pulls_queued,
+            grafts: node.relay.grafts,
+            prunes: node.relay.prunes,
+            eager_forwards: node.relay.eager_forwards,
             blob_requests_dropped: node.blob_requests_dropped,
         },
         topology: TopologyStats {
diff --git a/src/api/stats/prometheus.rs b/src/api/stats/prometheus.rs
index 0a1d75d..3d4bcc6 100644
--- a/src/api/stats/prometheus.rs
+++ b/src/api/stats/prometheus.rs
@@ -651,6 +651,24 @@ pub(super) fn render(stats: &StatsResponse, list: &PeerListResponse) -> String {
         relay.pulls_queued as f64,
     );
     out.single(
+        "grafts_total",
+        "counter",
+        "Links made eager: a pull brought changes over them.",
+        relay.grafts as f64,
+    );
+    out.single(
+        "prunes_total",
+        "counter",
+        "Links made lazy again: changes came over them that another path brought first.",
+        relay.prunes as f64,
+    );
+    out.single(
+        "eager_forwards_total",
+        "counter",
+        "Changes forwarded over eager links, per neighbour.",
+        relay.eager_forwards as f64,
+    );
+    out.single(
         "blob_requests_dropped_total",
         "counter",
         "Blob requests not answered: too many were being answered.",