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-rw-r--r--block_int.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/block_int.h b/block_int.h
index e8fff77a01..3565941458 100644
--- a/block_int.h
+++ b/block_int.h
@@ -24,6 +24,10 @@
 #ifndef BLOCK_INT_H
 #define BLOCK_INT_H
 
+#define BLOCK_FLAG_ENCRYPT	1
+#define BLOCK_FLAG_COMPRESS	2
+#define BLOCK_FLAG_COMPAT6	4
+
 struct BlockDriver {
     const char *format_name;
     int instance_size;