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From: Amir Goldstein <amir73il@gmail.com>
To: Chengguang Xu <cgxu519@mykernel.net>
Cc: Miklos Szeredi <miklos@szeredi.hu>,
	overlayfs <linux-unionfs@vger.kernel.org>
Subject: Re: [PATCH] ovl: fix incorrect extent info in metacopy case
Date: Wed, 24 Jun 2020 15:53:28 +0300
Message-ID: <CAOQ4uxi53CzBwXxygKMhDDSaGpX0CcfV6jiaKRFVbrFHW7PbxA@mail.gmail.com> (raw)
In-Reply-To: <20200624102011.4861-1-cgxu519@mykernel.net>

On Wed, Jun 24, 2020 at 1:23 PM Chengguang Xu <cgxu519@mykernel.net> wrote:
>
> In metacopy case, we should use ovl_inode_realdata() instead of
> ovl_inode_real() to get real inode which has data, so that
> we can get correct information of extentes in ->fiemap operation.
>
> Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>

looks right

Reviewed-by: Amir Goldstein <amir73il@gmail.com>

> ---
>  fs/overlayfs/inode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
> index 981f11ec51bc..a524af04b71d 100644
> --- a/fs/overlayfs/inode.c
> +++ b/fs/overlayfs/inode.c
> @@ -472,7 +472,7 @@ static int ovl_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
>                       u64 start, u64 len)
>  {
>         int err;
> -       struct inode *realinode = ovl_inode_real(inode);
> +       struct inode *realinode = ovl_inode_realdata(inode);
>         const struct cred *old_cred;
>
>         if (!realinode->i_op->fiemap)
> --
> 2.20.1
>
>

  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-24 10:20 Chengguang Xu
2020-06-24 12:53 ` Amir Goldstein [this message]
2020-06-25  8:35   ` Amir Goldstein
2020-06-25  9:46     ` cgxu

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