2012/4/11 Josef Bacik <josef@xxxxxxxxxx>:
> Btrfs stores generation numbers as 64bit numbers, which means we have to
> carry around a u64 in our incore inode in addition to setting i_generation.
> So convert to a u64 so btrfs can kill it's incore generation. Thanks,
>
> Signed-off-by: Josef Bacik <josef@xxxxxxxxxx>
> ---
> include/linux/fs.h | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 9be896d..40564e0 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -831,7 +831,7 @@ struct inode {
> struct cdev *i_cdev;
> };
>
> - __u32 i_generation;
> + u64 i_generation;
>
> #ifdef CONFIG_FSNOTIFY
> __u32 i_fsnotify_mask; /* all events this inode cares about */
> --
> 1.7.7.6
This patch can have several impact on other fs. Only to do an example
you can see the code in ioctl of ext4. I haven't got study the code
but the ioctl returns a long, but on 32bit system, long means 4 bytes,
so how we can return i_generation with ioctl?
Marco
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