MONITOR: Add disable_netlink option

Adding a new monitor boolean option to disable netlink support.
This will give users more control over sssd state changes without
having to modify systemd unit files.

Resolves:
https://fedorahosted.org/sssd/ticket/3142

Reviewed-by: Petr Cech <pcech@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>

1 files changed, 18 insertions, 3 deletions

diff --git a/src/monitor/monitor.c b/src/monitor/monitor.c
index 442bdbc42..84a144e56 100644
--- a/src/monitor/monitor.c
+++ b/src/monitor/monitor.c
@@ -2052,6 +2052,7 @@ static int monitor_process_init(struct mt_ctx *ctx,
     int num_providers;
     int ret;
     int error;
+    bool disable_netlink;
     struct sysdb_upgrade_ctx db_up_ctx;
 
     /* Set up the environment variable for the Kerberos Replay Cache */
@@ -2172,14 +2173,28 @@ static int monitor_process_init(struct mt_ctx *ctx,
         return ret;
     }
 
-    ret = setup_netlink(ctx, ctx->ev, network_status_change_cb,
-                        ctx, &ctx->nlctx);
+    ret = confdb_get_bool(ctx->cdb,
+                          CONFDB_MONITOR_CONF_ENTRY,
+                          CONFDB_MONITOR_DISABLE_NETLINK,
+                          false, &disable_netlink);
+
     if (ret != EOK) {
         DEBUG(SSSDBG_OP_FAILURE,
-              "Cannot set up listening for network notifications\n");
+              "Failed to read disable_netlink from confdb: [%d] %s\n",
+              ret, sss_strerror(ret));
         return ret;
     }
 
+    if (disable_netlink == false) {
+        ret = setup_netlink(ctx, ctx->ev, network_status_change_cb,
+                            ctx, &ctx->nlctx);
+        if (ret != EOK) {
+            DEBUG(SSSDBG_OP_FAILURE,
+                  "Cannot set up listening for network notifications\n");
+            return ret;
+        }
+    }
+
     /* start providers */
     num_providers = 0;
     for (dom = ctx->domains; dom; dom = get_next_domain(dom, 0)) {