On Thu, Jan 1, 2015 at 6:07 AM, Seunghun Lee <waydi1@xxxxxxxxx> wrote:
> Overlayfs should be mounted read-only when upper fs is r/o or nonexistend.
> But now it can be remounted read-write and this can causes kernel panic.
> So we should prevent read-write remount when the above situation.
>
> Signed-off-by: Seunghun Lee <waydi1@xxxxxxxxx>
This patch makes zero sense, did you use the wrong diff?
> ---
> fs/overlayfs/super.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
> index 84f3144..1faa5e5 100644
> --- a/fs/overlayfs/super.c
> +++ b/fs/overlayfs/super.c
> @@ -522,6 +522,14 @@ static int ovl_show_options(struct seq_file *m, struct dentry *dentry)
> return 0;
> }
>
> +static int squashfs_remount(struct super_block *sb, int *flags, char *data)
> +{
> + if (!ufs->upper_mnt || (ufs->upper_mnt->mnt_sb->s_flags & MS_RDONLY))
> + *flags |= MS_RDONLY;
> +
> + return 0;
> +}
> +
> static const struct super_operations ovl_super_operations = {
> .put_super = ovl_put_super,
> .statfs = ovl_statfs,
> --
> 2.1.3
>
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--
Thanks,
//richard
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