lvmetead: release token

Release allocated memory when destroing toolcontext

lib/cache/lvmetad.c

@@ -86,6 +86,12 @@ void lvmetad_set_token(const struct dm_config_value *filter)
 		log_warn("WARNING: Failed to set lvmetad token. Out of memory?");
 }
 
+void lvmetad_release_token(void)
+{
+	dm_free(_lvmetad_token);
+	_lvmetad_token = NULL;
+}
+
 void lvmetad_set_socket(const char *sock)
 {
 	_lvmetad_socket = sock;

lib/cache/lvmetad.h

@@ -63,6 +63,11 @@ void lvmetad_disconnect(void);
  */
 void lvmetad_set_token(const struct dm_config_value *filter);
 
+/*
+ * Release allocated token.
+ */
+void lvmetad_release_token(void);
+
 /*
  * Send a new version of VG metadata to lvmetad. This is normally called after
  * vg_write but before vg_commit. After vg_commit, lvmetad_vg_commit is called

lib/commands/toolcontext.c

@@ -1672,6 +1672,9 @@ void destroy_toolcontext(struct cmd_context *cmd)
 
 	dm_free(cmd);
 
+	lvmetad_release_token();
+	lvmetad_disconnect();
+
 	release_log_memory();
 	activation_exit();
 	reset_log_duplicated();