Add callback when the ID provider switches from offline to online

Allow backends to set a callback in the be_ctx that should be
invoked when the ID provider goes online.

This can be used to perform regular maintenance tasks that are
valid only when going online.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/providers/dp_backend.h b/src/providers/dp_backend.h
index d657af18b..496c80700 100644
--- a/src/providers/dp_backend.h
+++ b/src/providers/dp_backend.h
@@ -35,6 +35,8 @@ typedef void (*be_shutdown_fn)(void *);
 typedef void (*be_req_fn_t)(struct be_req *);
 typedef void (*be_async_callback_t)(struct be_req *, int, int, const char *);
 
+typedef void (*be_conn_online_callback_t)(void *);
+
 enum bet_type {
     BET_NULL = 0,
     BET_ID,
@@ -76,6 +78,8 @@ struct be_client {
 
 struct be_failover_ctx;
 
+struct be_conn_online_cb;
+
 struct be_ctx {
     struct tevent_context *ev;
     struct confdb_ctx *cdb;
@@ -85,6 +89,12 @@ struct be_ctx {
     const char *conf_path;
     struct be_failover_ctx *be_fo;
 
+    /* Functions to be invoked when the
+     * backend goes online
+     */
+    struct be_conn_online_cb *online_cb_list;
+    bool run_online_cb;
+
     struct be_offline_status offstat;
 
     struct sbus_connection *mon_conn;
@@ -126,6 +136,13 @@ struct be_acct_req {
 bool be_is_offline(struct be_ctx *ctx);
 void be_mark_offline(struct be_ctx *ctx);
 
+int be_add_online_cb(TALLOC_CTX *mem_ctx,
+                     struct be_ctx *ctx,
+                     be_conn_online_callback_t cb,
+                     void *pvt,
+                     struct be_conn_online_cb **online_cb);
+void be_run_online_cb(struct be_ctx *be);
+
 /* from data_provider_fo.c */
 typedef void (be_svc_callback_fn_t)(void *, struct fo_server *);