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resolved: flush the global DNS cache if /etc/resolv.conf is touched

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After all /etc/resolv.conf is usually done when the network
configuration changes, which is a good reason to flush the global cache.

See: #2038
This commit is contained in:
Lennart Poettering 2015-11-27 00:23:32 +01:00
parent bf7fabd600
commit 452b4e327d
1 changed files with 9 additions and 0 deletions
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9
src/resolve/resolved-resolv-conf.c
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@ -129,6 +129,15 @@ int manager_read_resolv_conf(Manager *m) {
* resolve VPN domains. */
manager_set_dns_server(m, m->dns_servers);
/* Unconditionally flush the cache when /etc/resolv.conf is
* modified, even if the data it contained was completely
* identical to the previous version we used. We do this
* because altering /etc/resolv.conf is typically done when
* the network configuration changes, and that should be
* enough to flush the global unicast DNS cache. */
if (m->unicast_scope)
dns_cache_flush(&m->unicast_scope->cache);
return 0;
clear: