Re: [PATCH 03/25] vfs: Allow fsinfo() to query what's in an fs_context [ver #14]

[Christian Brauner]

On Wed, Jun 26, 2019 at 11:02:59AM +0100, David Howells wrote:
> Christian Brauner <christian@xxxxxxxxxx> wrote:
> 
> > > +	ret = mutex_lock_interruptible(&fc->uapi_mutex);
> > > +	if (ret == 0) {
> > > +		ret = -EIO;
> > 
> > Why EIO when there's no root dentry?
> 
> Because I don't want to use ENODATA/EBADF and preferably not EINVAL and
> because the context you're accessing isn't in the correct state for you to be
> able to do that.  How about EBADFD ("File descriptor in bad state")?

Do we have that? If so that sounds good.

Christian