resolved: add support for explicitly forgetting everything we learnt about DNS server...

[thirdparty/systemd.git] / src / resolve / resolved-manager.c

diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index 58fe572d3b9969c7bbfb2fa68c6d05a6498b69da..50d32d37e9a010e9ac163169ed4df06abff783c7 100644 (file)
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -552,6 +552,17 @@ static int manager_sigusr2(sd_event_source *s, const struct signalfd_siginfo *si
         return 0;
 }
 
+static int manager_sigrtmin1(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
+        Manager *m = userdata;
+
+        assert(s);
+        assert(si);
+        assert(m);
+
+        manager_reset_server_features(m);
+        return 0;
+}
+
 int manager_new(Manager **ret) {
         _cleanup_(manager_freep) Manager *m = NULL;
         int r;
@@ -616,6 +627,7 @@ int manager_new(Manager **ret) {
 
         (void) sd_event_add_signal(m->event, &m->sigusr1_event_source, SIGUSR1, manager_sigusr1, m);
         (void) sd_event_add_signal(m->event, &m->sigusr2_event_source, SIGUSR2, manager_sigusr2, m);
+        (void) sd_event_add_signal(m->event, &m->sigrtmin1_event_source, SIGRTMIN+1, manager_sigrtmin1, m);
 
         manager_cleanup_saved_user(m);
 
@@ -679,6 +691,7 @@ Manager *manager_free(Manager *m) {
 
         sd_event_source_unref(m->sigusr1_event_source);
         sd_event_source_unref(m->sigusr2_event_source);
+        sd_event_source_unref(m->sigrtmin1_event_source);
 
         sd_event_unref(m->event);
 
@@ -1396,6 +1409,19 @@ void manager_flush_caches(Manager *m) {
         log_info("Flushed all caches.");
 }
 
+void manager_reset_server_features(Manager *m) {
+        Iterator i;
+        Link *l;
+
+        dns_server_reset_features_all(m->dns_servers);
+        dns_server_reset_features_all(m->fallback_dns_servers);
+
+        HASHMAP_FOREACH(l, m->links, i)
+                dns_server_reset_features_all(l->dns_servers);
+
+        log_info("Resetting learnt feature levels on all servers.");
+}
+
 void manager_cleanup_saved_user(Manager *m) {
         _cleanup_closedir_ DIR *d = NULL;
         struct dirent *de;