route-update: flush table when .list moves between groups

When a .list is moved between groups whose `gateway` files differ in metric semantics (e.g., failover→multipath), the previous code only deleted state and kept the table. This caused stale routes with the old `metric N` to coexist with newly loaded multipath routes, because `ip route replace` keyed on dst+metric and treated them as distinct entries. Two related changes: - cleanup_state's "moved" branch now flushes the table before the new group loads it, so the table starts clean. - cleanup_state is invoked before process_routes so the flushes happen prior to the new group's load (otherwise a flush after load would wipe out the just-installed routes). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

route-update: flush table when .list moves between groups
41bffb6b · Vitaly Lipatov · c5663ba3 · 41bffb6b
Commit 41bffb6b authored May 27, 2026 by Vitaly Lipatov
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Showing with 9 additions and 2 deletions

route-update.sh router/route-update.sh +9 -2

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--- a/router/route-update.sh
+++ b/router/route-update.sh
@@ -976,7 +976,10 @@ cleanup_state()
                    [ -f "$list_state/table" ] && read -r t < "$list_state/table"
                    if [ -n "$moved_to" ] ; then
                        local new_group=$(basename "$(dirname "$moved_to")")
-                        log "List $lname moved from $name to $new_group, removing old state (keeping table $t)"
+                        log "List $lname moved from $name to $new_group, flushing table $t for clean reload"
+                        if [ -z "$SHOW" ] && [ -n "$t" ] ; then
+                            $ipcmd route flush table "$t" 2>/dev/null
+                        fi
                    else
                        log "Cleaning orphaned state for $name/$lname (table $t)"
                        if [ -z "$SHOW" ] && [ -n "$t" ] ; then
@@ -1175,9 +1178,13 @@ check_list_duplicates "$ROUTES6_DIR" " (v6)" || dup_errors=$((dup_errors + $?))
 check_extra_dns
 [ -n "$EXTRA_DNS" ] && vlog "Extra DNS: $EXTRA_DNS" || log "Extra DNS ($EXTRA_DNS_SERVER) unreachable, local resolver only"

+# Cleanup runs FIRST so that flushes for moved/orphaned lists happen
+# before the new group reloads its routes (avoids stale metric'd routes
+# coexisting with newly loaded multipath routes when a list moves between
+# groups whose gateway configs differ).
+cleanup_state
 process_routes "$ROUTES_DIR" get_ipv4_list_bulk "ip" ""
 process_routes "$ROUTES6_DIR" get_ipv6_list_bulk "ip -6" " (v6)"
-cleanup_state
 generate_bird_config
 generate_web_json