added tunables settable using ctdb command line tool

(This used to be ctdb commit 73d440f8cb19373cfad7a2f0f0ca4f963c57ff29)

2 files changed, 53 insertions, 0 deletions

diff --git a/ctdb/include/ctdb.h b/ctdb/include/ctdb.h
index d8e32161d2..74039420fa 100644
--- a/ctdb/include/ctdb.h
+++ b/ctdb/include/ctdb.h
@@ -340,4 +340,22 @@ int ctdb_ctrl_thaw(struct ctdb_context *ctdb, struct timeval timeout, uint32_t d
 
 int ctdb_ctrl_getvnn(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode);
 
+int ctdb_ctrl_get_tunable(struct ctdb_context *ctdb, 
+			  struct timeval timeout, 
+			  uint32_t destnode,
+			  const char *name, uint32_t *value);
+
+int ctdb_ctrl_set_tunable(struct ctdb_context *ctdb, 
+			  struct timeval timeout, 
+			  uint32_t destnode,
+			  const char *name, uint32_t value);
+
+int ctdb_ctrl_list_tunables(struct ctdb_context *ctdb, 
+			    struct timeval timeout, 
+			    uint32_t destnode,
+			    TALLOC_CTX *mem_ctx,
+			    const char ***list, uint32_t *count);
+
+
+
 #endif
diff --git a/ctdb/include/ctdb_private.h b/ctdb/include/ctdb_private.h
index d7f2b32cea..75126b2115 100644
--- a/ctdb/include/ctdb_private.h
+++ b/ctdb/include/ctdb_private.h
@@ -400,6 +400,9 @@ enum ctdb_controls {CTDB_CONTROL_PROCESS_EXISTS          = 0,
 		    CTDB_CONTROL_TCP_ADD                 = 45,
 		    CTDB_CONTROL_TCP_REMOVE              = 46,
 		    CTDB_CONTROL_STARTUP                 = 47,
+		    CTDB_CONTROL_SET_TUNABLE             = 48,
+		    CTDB_CONTROL_GET_TUNABLE             = 49,
+		    CTDB_CONTROL_LIST_TUNABLES           = 50,
 };
 
 /*
@@ -822,6 +825,33 @@ struct ctdb_control_set_dmaster {
 	uint32_t dmaster;
 };
 
+/*
+  structure for setting a tunable
+ */
+struct ctdb_control_set_tunable {
+	uint32_t value;
+	uint32_t length;
+	uint8_t  name[1];
+};
+
+/*
+  structure for getting a tunable
+ */
+struct ctdb_control_get_tunable {
+	uint32_t length;
+	uint8_t  name[1];
+};
+
+/*
+  structure for listing tunables
+ */
+struct ctdb_control_list_tunable {
+	uint32_t length;
+	/* returns a : separated list of tunable names */
+	uint8_t  data[1];
+};
+
+
 /* table that contains a list of all nodes a ctdb knows about and their 
    status
  */
@@ -936,4 +966,9 @@ bool ctdb_recovery_lock(struct ctdb_context *ctdb, bool keep);
 
 int ctdb_set_recovery_lock_file(struct ctdb_context *ctdb, const char *file);
 
+int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata, 
+				 TDB_DATA *outdata);
+int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata);
+int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata);
+
 #endif