diff options
Diffstat (limited to 'include/ext4fs.h')
| -rw-r--r-- | include/ext4fs.h | 53 |
1 files changed, 52 insertions, 1 deletions
diff --git a/include/ext4fs.h b/include/ext4fs.h index d96edfd0576..41f9eb8bd33 100644 --- a/include/ext4fs.h +++ b/include/ext4fs.h @@ -34,12 +34,63 @@ struct disk_partition; #define EXT4_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ #define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */ #define EXT4_EXT_MAGIC 0xf30a -#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 + +#define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 +#define EXT4_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 +#define EXT4_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 +#define EXT4_FEATURE_RO_COMPAT_HUGE_FILE 0x0008 +#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010 +#define EXT4_FEATURE_RO_COMPAT_DIR_NLINK 0x0020 +#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_INCOMPAT_FILETYPE 0x0002 +#define EXT4_FEATURE_INCOMPAT_RECOVER 0x0004 #define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040 #define EXT4_FEATURE_INCOMPAT_64BIT 0x0080 +#define EXT4_FEATURE_INCOMPAT_MMP 0x0100 +#define EXT4_FEATURE_INCOMPAT_FLEX_BG 0x0200 +#define EXT4_FEATURE_INCOMPAT_CSUM_SEED 0x2000 +#define EXT4_FEATURE_INCOMPAT_ENCRYPT 0x10000 + #define EXT4_INDIRECT_BLOCKS 12 +/* + * Incompat features supported by this implementation. + */ +#define EXT4_FEATURE_INCOMPAT_SUPP (EXT4_FEATURE_INCOMPAT_FILETYPE | \ + EXT4_FEATURE_INCOMPAT_RECOVER | \ + EXT4_FEATURE_INCOMPAT_EXTENTS | \ + EXT4_FEATURE_INCOMPAT_64BIT | \ + EXT4_FEATURE_INCOMPAT_FLEX_BG) + +/* + * Incompat features supported by this implementation only in a lazy + * way, good enough for reading files. + * + * - Multi mount protection (mmp) is not supported, but for read-only + * we get away with it. + * - Same for metadata_csum_seed and metadata_csum. + * - The implementation has also no clue about fscrypt, but it can read + * unencrypted files. Reading encrypted files will read garbage. + */ +#define EXT4_FEATURE_INCOMPAT_SUPP_LAZY_RO (EXT4_FEATURE_INCOMPAT_MMP | \ + EXT4_FEATURE_INCOMPAT_CSUM_SEED | \ + EXT4_FEATURE_INCOMPAT_ENCRYPT) + +/* + * Read-only compat features we support. + * If unknown ro compat features are detected, writing to the fs is denied. + */ +#define EXT4_FEATURE_RO_COMPAT_SUPP (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \ + EXT4_FEATURE_RO_COMPAT_LARGE_FILE | \ + EXT4_FEATURE_RO_COMPAT_HUGE_FILE | \ + EXT4_FEATURE_RO_COMPAT_GDT_CSUM | \ + EXT4_FEATURE_RO_COMPAT_DIR_NLINK | \ + EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) + #define EXT4_BG_INODE_UNINIT 0x0001 #define EXT4_BG_BLOCK_UNINIT 0x0002 #define EXT4_BG_INODE_ZEROED 0x0004 |