From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 18 Oct 2024 09:30:12 +0000 (+0200)
Subject: resolved: refresh resolv.conf files when link goes away
X-Git-Tag: v257-rc1~186
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=562f7bde8872b4fd03db11bf25c9dd294fd2c186;p=thirdparty%2Fsystemd.git

resolved: refresh resolv.conf files when link goes away

This might have the effect that some DNS server or search domain
disappears, hence rewrite the relevant files.

See: #27543
---

diff --git a/src/resolve/resolved-manager.c b/src/resolve/resolved-manager.c
index e6d112964af..dbaad81734b 100644
--- a/src/resolve/resolved-manager.c
+++ b/src/resolve/resolved-manager.c
@@ -97,6 +97,9 @@ static int manager_process_link(sd_netlink *rtnl, sd_netlink_message *mm, void *
                         log_debug("Removing link %i/%s", l->ifindex, l->ifname);
                         link_remove_user(l);
                         link_free(l);
+
+                        /* Make sure DNS servers are dropped from written resolv.conf if their link goes away */
+                        manager_write_resolv_conf(m);
                 }
 
                 break;