On Mon 22-11-21 11:00:37, Chengguang Xu wrote:
> From: Chengguang Xu <charliecgxu@xxxxxxxxxxx>
>
> Introduce new helper ovl_sync_upper_blockdev() to sync
> upper blockdev.
>
> Signed-off-by: Chengguang Xu <charliecgxu@xxxxxxxxxxx>
Looks good. Feel free to add:
Reviewed-by: Jan Kara <jack@xxxxxxx>
Honza
> ---
> fs/overlayfs/super.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
> index 12acf0ec7395..ccffcd96491d 100644
> --- a/fs/overlayfs/super.c
> +++ b/fs/overlayfs/super.c
> @@ -258,6 +258,16 @@ static void ovl_put_super(struct super_block *sb)
> ovl_free_fs(ofs);
> }
>
> +static int ovl_sync_upper_blockdev(struct super_block *sb, int wait)
> +{
> + if (!sb->s_bdev)
> + return 0;
> +
> + if (!wait)
> + return filemap_flush(sb->s_bdev->bd_inode->i_mapping);
> + return filemap_write_and_wait_range(sb->s_bdev->bd_inode->i_mapping, 0, LLONG_MAX);
> +}
> +
> /* Sync real dirty inodes in upper filesystem (if it exists) */
> static int ovl_sync_fs(struct super_block *sb, int wait)
> {
> --
> 2.27.0
>
>
--
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR
