Add a control to read the PNN number of the local node to libctdb

[sahlberg/ctdb.git] / libctdb / libctdb.c

diff --git a/libctdb/libctdb.c b/libctdb/libctdb.c
index 47cc7c24d66c81bcb4de1e9e422ce5960ff02aa1..73bbb9f3668ef704cf227a7ed723301cda087509 100644 (file)
--- a/libctdb/libctdb.c
+++ b/libctdb/libctdb.c
@@ -145,23 +145,100 @@ struct ctdb_control_cb_data {
        void *private_data;
 };
 
+
+
+
+/*************************
+ * GET PNN of local node *
+ *************************/
 static void
-ctdb_getrecmaster_recv_cb(struct ctdb_client_control_state *state)
+ctdb_getpnn_recv_cb(struct ctdb_client_control_state *state)
 {
        struct ctdb_control_cb_data *cb_data = state->async.private_data;
-       ctdb_get_recmaster_cb callback = (ctdb_get_recmaster_cb)cb_data->callback;
+       ctdb_getpnn_cb callback = (ctdb_getpnn_cb)cb_data->callback;
 
        callback(0, state->status, cb_data->private_data);
 }
 
+ctdb_handle *
+ctdb_getpnn_send(struct ctdb_context *ctdb,
+                       ctdb_getpnn_cb callback,
+                       void *private_data)
+{
+       struct ctdb_client_control_state *state;
+       struct ctdb_control_cb_data *cb_data;
+
+       state = ctdb_control_send(ctdb, CTDB_CURRENT_NODE, 0, 
+                          CTDB_CONTROL_GET_PNN, 0, tdb_null, 
+                          ctdb, NULL);
+
+       if (state == NULL) {
+               DEBUG(DEBUG_ERR,(__location__ " Failed to send GET_PNN control\n"));
+               return NULL;
+       }
+
+       if (callback != NULL) {
+               cb_data = talloc(state, struct ctdb_control_cb_data);
+               cb_data->callback     = callback;
+               cb_data->private_data = private_data;
+
+               state->async.fn           = ctdb_getpnn_recv_cb;
+               state->async.private_data = cb_data;
+       }
+
+       return (ctdb_handle *)state;
+}
+
+int ctdb_getpnn_recv(struct ctdb_context *ctdb, ctdb_handle *handle, uint32_t *pnn)
+{
+       struct ctdb_client_control_state *state = talloc_get_type(handle, struct ctdb_client_control_state);
+       int ret;
+       int32_t res;
+
+       ret = ctdb_control_recv(ctdb, state, state, NULL, &res, NULL);
+       if (ret != 0) {
+               DEBUG(DEBUG_ERR,(__location__ " ctdb_getpnn_recv failed\n"));
+               return -1;
+       }
+
+       if (pnn != NULL) {
+               *pnn = (uint32_t)res;
+       }
+
+       return state->status;
+}
+
+int ctdb_getpnn(struct ctdb_context *ctdb, uint32_t *pnn)
+{
+       struct ctdb_client_control_state *state;
+       
+       state = ctdb_getpnn_send(ctdb, NULL, NULL);
+       if (state == NULL) {
+               DEBUG(DEBUG_ERR,(__location__ " ctdb_getpnn_send() failed.\n"));
+               return -1;
+       }
+
+       return ctdb_getpnn_recv(ctdb, state, pnn);
+}
+
+
+
+/***********************
+ * GET RECOVERY MASTER *
+ ***********************/
+static void
+ctdb_getrecmaster_recv_cb(struct ctdb_client_control_state *state)
+{
+       struct ctdb_control_cb_data *cb_data = state->async.private_data;
+       ctdb_getrecmaster_cb callback = (ctdb_getrecmaster_cb)cb_data->callback;
+
+       callback(0, state->status, cb_data->private_data);
+}
 
-/*
-  get the recovery master of a remote node
- */
 ctdb_handle *
 ctdb_getrecmaster_send(struct ctdb_context *ctdb,
                        uint32_t destnode,
-                       ctdb_get_recmaster_cb callback,
+                       ctdb_getrecmaster_cb callback,
                        void *private_data)
 {
        struct ctdb_client_control_state *state;
@@ -200,7 +277,7 @@ int ctdb_getrecmaster_recv(struct ctdb_context *ctdb, ctdb_handle *handle, uint3
                return -1;
        }
 
-       if (recmaster) {
+       if (recmaster != NULL) {
                *recmaster = (uint32_t)res;
        }
 
@@ -211,7 +288,7 @@ int ctdb_getrecmaster(struct ctdb_context *ctdb, uint32_t destnode, uint32_t *re
 {
        struct ctdb_client_control_state *state;
        
-       state = ctdb_getrecmaster_send(ctdb, destnode, NULL, recmaster);
+       state = ctdb_getrecmaster_send(ctdb, destnode, NULL, NULL);
        if (state == NULL) {
                DEBUG(DEBUG_ERR,(__location__ " ctdb_getrecmaster_send() failed.\n"));
                return -1;
@@ -221,6 +298,15 @@ int ctdb_getrecmaster(struct ctdb_context *ctdb, uint32_t destnode, uint32_t *re
 }
 
 
+
+
+
+
+
+
+
+
+
 static void
 ctdb_set_message_handler_recv_cb(struct ctdb_client_control_state *state)
 {