Re: [RFC PATCH v5 03/10] ovl: implement overlayfs' ->evict_inode operation

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On Thu, 23 Sept 2021 at 15:08, Chengguang Xu <cgxu519@xxxxxxxxxxxx> wrote:
>
> Implement overlayfs' ->evict_inode operation,
> so that we can clear dirty flags of overlayfs inode.
>
> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
> ---
>  fs/overlayfs/super.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
> index 51886ba6130a..2ab77adf7256 100644
> --- a/fs/overlayfs/super.c
> +++ b/fs/overlayfs/super.c
> @@ -406,11 +406,18 @@ static int ovl_remount(struct super_block *sb, int *flags, char *data)
>         return ret;
>  }
>
> +static void ovl_evict_inode(struct inode *inode)
> +{
> +       inode->i_state &= ~I_DIRTY_ALL;
> +       clear_inode(inode);

clear_inode() should already clear the dirty flags; the default
eviction should work fine without having to define an ->evict_inode.
What am I missing?

Thanks,
Miklos



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