On Thu, Apr 26, 2018 at 12:09 PM, Vivek Goyal <vgoyal@xxxxxxxxxx> wrote:
> Add an helper to retrieve real data inode associated with overlay inode.
> This helper will ignore all metacopy inodes and will return only the
> real inode which has data.
>
> Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
Suggest to rename to ovl_inode_realdata
> ---
> fs/overlayfs/overlayfs.h | 1 +
> fs/overlayfs/util.c | 12 ++++++++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
> index 29c3498a7e61..e24af484967f 100644
> --- a/fs/overlayfs/overlayfs.h
> +++ b/fs/overlayfs/overlayfs.h
> @@ -236,6 +236,7 @@ struct inode *ovl_inode_upper(struct inode *inode);
> struct inode *ovl_inode_lower(struct inode *inode);
> struct inode *ovl_inode_lowerdata(struct inode *inode);
> struct inode *ovl_inode_real(struct inode *inode);
> +struct inode *ovl_inode_real_data(struct inode *inode);
> struct ovl_dir_cache *ovl_dir_cache(struct inode *inode);
> void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache);
> void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry);
> diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
> index 58aa14a02bb0..c7a1bd40dc6a 100644
> --- a/fs/overlayfs/util.c
> +++ b/fs/overlayfs/util.c
> @@ -268,6 +268,18 @@ struct inode *ovl_inode_lowerdata(struct inode *inode)
> return OVL_I(inode)->lowerdata ?: ovl_inode_lower(inode);
> }
>
> +/* Return real inode which contains data. Does not return metacopy inode */
> +struct inode *ovl_inode_real_data(struct inode *inode)
> +{
> + struct inode *upperinode;
> +
> + upperinode = ovl_inode_upper(inode);
> + if (upperinode && ovl_has_upperdata(inode))
> + return upperinode;
> +
> + return ovl_inode_lowerdata(inode);
> +}
> +
>
> struct ovl_dir_cache *ovl_dir_cache(struct inode *inode)
> {
> --
> 2.13.6
>
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