Add incompat flag for big metadata blocks

Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/ctree.h b/ctree.h
index 5309059..6545c50 100644 (file)
--- a/ctree.h
+++ b/ctree.h
@@ -412,6 +412,20 @@ struct btrfs_super_block {
 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL  (1ULL << 1)
 #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS    (1ULL << 2)
 #define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO    (1ULL << 3)
+/*
+ * some patches floated around with a second compression method
+ * lets save that incompat here for when they do get in
+ * Note we don't actually support it, we're just reserving the
+ * number
+ */
+#define BTRFS_FEATURE_INCOMPAT_COMPRESS_LZOv2   (1ULL << 4)
+
+/*
+ * older kernels tried to do bigger metadata blocks, but the
+ * code was pretty buggy.  Lets not let them try anymore.
+ */
+#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA     (1ULL << 5)
+
 
 #define BTRFS_FEATURE_COMPAT_SUPP              0ULL
 #define BTRFS_FEATURE_COMPAT_RO_SUPP           0ULL
@@ -419,6 +433,7 @@ struct btrfs_super_block {
        (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |         \
         BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL |        \
         BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO |          \
+        BTRFS_FEATURE_INCOMPAT_BIG_METADATA |          \
         BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
 
 /*