On-disk format definition for 64-bit support

- EXT4_FEATURE_INCOMPAT_64BIT (0x0080) - support for 64-bit block count
  fields in the superblock (s_blocks_count_hi, s_free_blocks_count_hi),
  large group descriptors (s_desc_size), extents with high 16 bits
  (ee_start_hi, ei_leaf_hi), inode ACL (i_file_acl_hi).  May also grow
  to encompass the previously proposed BIG_BG.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
3 files changed