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authorMiroslav Lichvar <mlichvar@redhat.com>2014-08-27 16:47:24 +0200
committerKay Sievers <kay@vrfy.org>2014-09-02 13:34:16 +0200
commit63463bf091949e0178b749016828ec400c106582 (patch)
tree76efa721141d75dae5e8867e7e295f53a203a4aa /src
parentcedc611207b6a14cdbaf1d73e12b62ee55cc53de (diff)
timesyncd: wait before reconnecting to first server
When all servers are exhausted, wait for one poll interval before trying to connect again to the first server in the list. Also, keep increasing the polling interval to make sure a client not getting any valid replies will not send requests to any server more frequently than is allowed by the maximum polling interval.
Diffstat (limited to 'src')
-rw-r--r--src/timesync/timesyncd-manager.c24
-rw-r--r--src/timesync/timesyncd-manager.h1
2 files changed, 24 insertions, 1 deletions
diff --git a/src/timesync/timesyncd-manager.c b/src/timesync/timesyncd-manager.c
index 696dd10e69..b7b39ef822 100644
--- a/src/timesync/timesyncd-manager.c
+++ b/src/timesync/timesyncd-manager.c
@@ -875,6 +875,7 @@ int manager_connect(Manager *m) {
manager_set_server_name(m, m->current_server_name->names_next);
else {
ServerName *f;
+ bool restart = true;
/* Our current server name list is exhausted,
* let's find the next one to iterate. First
@@ -891,6 +892,8 @@ int manager_connect(Manager *m) {
f = m->link_servers;
if (!f)
f = m->system_servers;
+ else
+ restart = false;
}
if (!f)
@@ -902,6 +905,25 @@ int manager_connect(Manager *m) {
return 0;
}
+ if (restart && !m->exhausted_servers && m->poll_interval_usec) {
+ log_debug("Waiting after exhausting servers.");
+ r = sd_event_add_time(m->event, &m->event_retry, clock_boottime_or_monotonic(), now(clock_boottime_or_monotonic()) + m->poll_interval_usec, 0, manager_retry_connect, m);
+ if (r < 0) {
+ log_error("Failed to create retry timer: %s", strerror(-r));
+ return r;
+ }
+
+ m->exhausted_servers = true;
+
+ /* Increase the polling interval */
+ if (m->poll_interval_usec < NTP_POLL_INTERVAL_MAX_SEC * USEC_PER_SEC)
+ m->poll_interval_usec *= 2;
+
+ return 0;
+ }
+
+ m->exhausted_servers = false;
+
manager_set_server_name(m, f);
}
@@ -1042,7 +1064,7 @@ static int manager_network_event_handler(sd_event_source *s, int fd, uint32_t re
online = network_is_online();
/* check if the client is currently connected */
- connected = m->server_socket >= 0 || m->resolve_query;
+ connected = m->server_socket >= 0 || m->resolve_query || m->exhausted_servers;
if (connected && !online) {
log_info("No network connectivity, watching for changes.");
diff --git a/src/timesync/timesyncd-manager.h b/src/timesync/timesyncd-manager.h
index 2345bf8f36..bb3e50915e 100644
--- a/src/timesync/timesyncd-manager.h
+++ b/src/timesync/timesyncd-manager.h
@@ -41,6 +41,7 @@ struct Manager {
LIST_HEAD(ServerName, fallback_servers);
RateLimit ratelimit;
+ bool exhausted_servers;
/* network */
sd_event_source *network_event_source;