From: Andreas Dilger <adilger@clusterfs.com>
To: Theodore Ts'o <tytso@mit.edu>
Cc: linux-ext4@vger.kernel.org
Subject: Re: [PATCH, E2FSPROGS] On-disk format for inode extra size control inode size
Date: Wed, 18 Oct 2006 13:34:38 -0600 [thread overview]
Message-ID: <20061018193437.GG3509@schatzie.adilger.int> (raw)
In-Reply-To: <E1Ga4rR-000534-CE@candygram.thunk.org>
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@mit.edu>
> @@ -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.
next prev parent reply other threads:[~2006-10-18 19:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-18 6:25 [PATCH, E2FSPROGS] On-disk format for inode extra size control inode size Theodore Ts'o
2006-10-18 19:34 ` Andreas Dilger [this message]
2006-10-18 22:16 ` Theodore Tso
2006-10-18 22:59 ` Andreas Dilger
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