svn commit: r193377 - head/sys/gnu/fs/ext2fs

[Bruce Evans]

On Wed, 3 Jun 2009, Stanislav Sedov wrote:

> Log:
>  - Sync our copies of ext2fs Linux headers to current Linux versions.
>    Minimize differencies between our ext2fs headers and relevant Linux
>    versions by using EXT2_SB macro to access the superblock fields. Most
>    of the differencies in access to these fields are now hidden inside
>    this macro.
>  - Rename the s_db_per_group field of ext2fs_sb_info to s_gdb_count
>    to reflect the similar change in Linux headers. New name also seem
>    to be more appropriate for this field.
>  - Use proper types for s_first_inode and s_inode_size in-core superblock
>    fields. Now they reflec types used in the on-disk superblock version.
>  - Add support for older filesystem revisions that doesn't have proper
>    s_first_ino and s_inode_size fields in the on-disk superblock. In these
>    cases predefined values for these fields are used.
>  - Add simple sanity checks for s_first_inode and s_inode_size correctness.
>
>  Reviewed by:	bde (previous version)
>  MFC after:	2 weeks

Thanks.

Bruce