On Sun, 01 Jul 2007 03:37:16 -0400
Mingming Cao <cmm@xxxxxxxxxx> wrote:
> This patch adds a 32-bit i_version_hi field to ext4_inode, which can be used for 64-bit inode versions. This field will store the higher 32 bits of the version, while Jean Noel's patch has added support to store the lower 32-bits in osd1.linux1.l_i_version.
Please wordwrap this changelog entry to less than 80 columns. Well, less
than 258, anyway ;)
> Signed-off-by: Mingming Cao <cmm@xxxxxxxxxx>
> Signed-off-by: Andreas Dilger <adilger@xxxxxxxxxxxxx>
> Signed-off-by: Kalpak Shah <kalpak@xxxxxxxxxxxxx>
> ---
> Index: linux-2.6.21/include/linux/ext4_fs.h
> ===================================================================
> --- linux-2.6.21.orig/include/linux/ext4_fs.h
> +++ linux-2.6.21/include/linux/ext4_fs.h
> @@ -342,6 +342,7 @@ struct ext4_inode {
> __le32 i_atime_extra; /* extra Access time (nsec << 2 | epoch) */
> __le32 i_crtime; /* File Creation time */
> __le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */
> + __le32 i_version_hi; /* high 32 bits for 64-bit version */
> };
Aren't there forward- backward-compatibility issues here? How does the
filesystem driver work out whether this field is present and valid?
The changelog should describe this design issue.
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