diff --git a/src/sf_types.h b/src/sf_types.h
index 126d4ed..76d5b8d 100644
--- a/src/sf_types.h
+++ b/src/sf_types.h
@@ -69,7 +69,7 @@ typedef struct {
     SFErrorInfo error;
 } SFResponseInfo;
 
-typedef struct fs_binlog_file_position {
+typedef struct sf_binlog_file_position {
     int index;      //current binlog file
     int64_t offset; //current file offset
 } SFBinlogFilePosition;
@@ -81,4 +81,10 @@ typedef struct server_binlog_buffer {
     int size;      //the buffer size (capacity)
 } SFBinlogBuffer;
 
+typedef struct sf_space_stat {
+    int64_t total;
+    int64_t avail;
+    int64_t used;
+} SFSpaceStat;
+
 #endif