Increment version for clustered bitmaps

[thirdparty/mdadm.git] / super1.c

diff --git a/super1.c b/super1.c
index 9b991e6c3e9ba9567d47dfb2d6108765c05d5fde..52952eb40e43749622ca845378d11deca4400c50 100644 (file)
--- a/super1.c
+++ b/super1.c
@@ -125,6 +125,7 @@ struct misc_dev_info {
                                            * backwards anyway.
                                            */
 #define        MD_FEATURE_NEW_OFFSET           64 /* new_offset must be honoured */
+#define        MD_FEATURE_BITMAP_VERSIONED     256 /* bitmap version number checked properly */
 #define        MD_FEATURE_ALL                  (MD_FEATURE_BITMAP_OFFSET       \
                                        |MD_FEATURE_RECOVERY_OFFSET     \
                                        |MD_FEATURE_RESHAPE_ACTIVE      \
@@ -132,6 +133,7 @@ struct misc_dev_info {
                                        |MD_FEATURE_REPLACEMENT         \
                                        |MD_FEATURE_RESHAPE_BACKWARDS   \
                                        |MD_FEATURE_NEW_OFFSET          \
+                                       |MD_FEATURE_BITMAP_VERSIONED    \
                                        )
 
 /* return how many bytes are needed for bitmap, for cluster-md each node
@@ -2163,6 +2165,9 @@ add_internal_bitmap1(struct supertype *st,
        bms->sync_size = __cpu_to_le64(size);
        bms->write_behind = __cpu_to_le32(write_behind);
        bms->nodes = __cpu_to_le32(st->nodes);
+       if (st->nodes)
+               sb->feature_map = __cpu_to_le32(__le32_to_cpu(sb->feature_map)
+                                               | MD_FEATURE_BITMAP_VERSIONED);
        if (st->cluster_name)
                strncpy((char *)bms->cluster_name,
                        st->cluster_name, strlen(st->cluster_name));