ref: 86fbd4e7446d606796dc3877aad8cffa9a611846
parent: 504fa350e718a379f4a0ae764a80d1d8dd1b959b
author: gkostka <kostka.grzegorz@gmail.com>
date: Tue Oct 21 20:30:39 EDT 2014
Update supported features
--- a/lwext4/ext4_types.h
+++ b/lwext4/ext4_types.h
@@ -201,7 +201,7 @@
#define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE 0x0040
#define EXT4_FEATURE_RO_COMPAT_QUOTA 0x0100
#define EXT4_FEATURE_RO_COMPAT_BIGALLOC 0x0200
-#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
+#define EXT4_FEATURE_RO_COMPAT_METADATA_CSUM 0x0400
/*
* Incompatible features
@@ -222,20 +222,78 @@
#define EXT4_FEATURE_INCOMPAT_INLINE_DATA 0x8000 /* data in inode */
-#define EXT4_FEATURE_COMPAT_SUPP (EXT4_FEATURE_COMPAT_DIR_INDEX)
+/*
+ * EXT2 supported feature set
+ */
+#define EXT2_FEATURE_COMPAT_SUPP 0x0000
-#define EXT4_FEATURE_INCOMPAT_SUPP \
- (EXT4_FEATURE_INCOMPAT_FILETYPE | \
- EXT4_FEATURE_INCOMPAT_EXTENTS | \
- EXT4_FEATURE_INCOMPAT_64BIT)
+#define EXT2_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | \
+ EXT4_FEATURE_INCOMPAT_META_BG)
-#define EXT4_FEATURE_RO_COMPAT_SUPP \
- (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
- EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
- EXT4_FEATURE_RO_COMPAT_HUGE_FILE | \
- EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
- EXT4_FEATURE_RO_COMPAT_GDT_CSUM | \
- EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)
+#define EXT2_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
+ EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
+
+/*
+ * EXT3 supported feature set
+ */
+#define EXT3_FEATURE_COMPAT_SUPP \
+ (EXT4_FEATURE_COMPAT_DIR_INDEX)
+
+#define EXT3_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | \
+ EXT4_FEATURE_INCOMPAT_META_BG)
+
+#define EXT3_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
+ EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_BTREE_DIR)
+
+/*
+ * EXT4 supported feature set
+ */
+#define EXT4_FEATURE_COMPAT_SUPP \
+ (EXT4_FEATURE_COMPAT_DIR_INDEX)
+
+#define EXT4_FEATURE_INCOMPAT_SUPP \
+ (EXT4_FEATURE_INCOMPAT_FILETYPE | \
+ EXT4_FEATURE_INCOMPAT_META_BG | \
+ EXT4_FEATURE_INCOMPAT_EXTENTS | \
+ EXT4_FEATURE_INCOMPAT_64BIT)
+
+#define EXT4_FEATURE_RO_COMPAT_SUPP \
+ (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
+ EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM | \
+ EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \
+ EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE | \
+ EXT4_FEATURE_RO_COMPAT_BTREE_DIR | \
+ EXT4_FEATURE_RO_COMPAT_HUGE_FILE)
+
+
+/*Ignored features:
+ * RECOVER - journaling in lwext4 is not supported
+ * (probably won,t be ever...)
+ * MMP - multi mout protection (impossible scenario)
+ * */
+#define FEATURE_INCOMPAT_IGNORED \
+ EXT4_FEATURE_INCOMPAT_RECOVER | \
+ EXT4_FEATURE_INCOMPAT_MMP)
+
+#if 0
+/*TODO: Features incompatible to implement*/
+#define EXT4_FEATURE_INCOMPAT_SUPP
+ EXT4_FEATURE_INCOMPAT_FLEX_BG| \
+ EXT4_FEATURE_INCOMPAT_INLINE_DATA)
+
+/*TODO: Features read only to implement*/
+#define EXT4_FEATURE_RO_COMPAT_SUPP
+ EXT4_FEATURE_RO_COMPAT_BIGALLOC |\
+ EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
+ EXT4_FEATURE_RO_COMPAT_QUOTA)
+#endif
struct ext4_fs {struct ext4_blockdev*bdev;