From 19461552f88e8b82a24c63c00a6591996ae8f45d Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Fri, 6 Nov 2026 06:58:48 +0100
Subject: trees at runtime

---
 src/api/stats.rs            |  7 +++++++
 src/api/stats/prometheus.rs | 12 ++++++++++++
 2 files changed, 19 insertions(+)

(limited to 'src/api')

diff --git a/src/api/stats.rs b/src/api/stats.rs
index 2af6549..8eaff0c 100644
--- a/src/api/stats.rs
+++ b/src/api/stats.rs
@@ -146,6 +146,11 @@ struct RelayStats {
     pulls_queued: u64,
     /// Changes passed on along writers' trees, per child (`swarm::tree`).
     tree_forwards: u64,
+    /// Sync messages along a writer's tree, carrying changes, from a peer other than our
+    /// parent in it; and changes of writers in whose trees we have a parent that came
+    /// another way (`tree::note_arrival`).
+    tree_from_others: u64,
+    tree_missed: u64,
     /// Blob requests not answered: too many were being answered.
     blob_requests_dropped: u64,
 }
@@ -374,6 +379,8 @@ pub(crate) async fn collect(state: &AppState, list: &PeerListResponse) -> StatsR
             pulls: node.relay.pulls,
             pulls_queued: node.relay.pulls_queued,
             tree_forwards: node.relay.tree_forwards,
+            tree_from_others: node.relay.tree_from_others,
+            tree_missed: node.relay.tree_missed,
             blob_requests_dropped: node.blob_requests_dropped,
         },
         topology: TopologyStats {
diff --git a/src/api/stats/prometheus.rs b/src/api/stats/prometheus.rs
index fb8b890..8b8ca1c 100644
--- a/src/api/stats/prometheus.rs
+++ b/src/api/stats/prometheus.rs
@@ -668,6 +668,18 @@ pub(super) fn render(stats: &StatsResponse, list: &PeerListResponse) -> String {
         "Changes passed on along writers' trees, per child.",
         relay.tree_forwards as f64,
     );
+    out.single(
+        "tree_from_others_total",
+        "counter",
+        "Sync messages along a writer's tree, carrying changes, from a peer other than our parent in it.",
+        relay.tree_from_others as f64,
+    );
+    out.single(
+        "tree_missed_total",
+        "counter",
+        "Changes of writers in whose trees we have a parent that came another way.",
+        relay.tree_missed as f64,
+    );
     out.single(
         "blob_requests_dropped_total",
         "counter",
-- 
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