On Oct 18, 2006 02:25 -0400, Theodore Ts'o wrote:
> On-disk format for controlling the inode size
>
> - EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE (0x0040?) - add s_min_extra_isize and
> s_want_extra_isize fields to superblock, which allow specifying
> the minimum and desired i_extra_isize fields in large inodes
> (for nsec+epoch timestamps, potential other uses). Needs RO_COMPAT
> flag handling, needs e2fsck support, patch complete, little testing.
>
> Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
> @@ -405,6 +405,11 @@
> } osd2; /* OS dependent 2 */
> __u16 i_extra_isize;
> __u16 i_pad1;
> + __u32 i_ctime_extra; /* extra Change time (nsec << 2 | epoch) */
There was some discussion about moving the i_ctime_extra field into the
small inode, for use as a version field by NFSV4. The proposed field was
l_i_reserved2 in the original Bull patch.
> + __u32 i_mtime_extra; /* extra Mod. time (nsec << 2 | epoch) */
^^^ Modify
Looks good otherwise.
Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.
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