Re: [PATCH 02/12] quota: Allow each filesystem to specify which quota types it supports

[Christoph Hellwig <hch@xxxxxx>]

On Wed, Oct 22, 2014 at 06:51:50PM +0200, Jan Kara wrote:
>   So there are two reasons:
> 1) Currently if you call quotactl() with invalid quota type you'll get
> EINVAL. To maintain this with addition of project quotas you need to check
> the types early before calling check_quotactl_permission() and other
> checks.
> 
> 2) I didn't want filesystem quotactl callbacks to deal with quota types
> they don't support. Sure each fs could do a type check in the callback but
> this looked easier.
> 
> Now I see your point about s_dquot and I can move allowed_types out of
> s_dquot if that makes you happier. But otherwise what I did still seems as
> the best solution to me.

Moving it out of s_dquot seems very sensible to me.