On Tue, Nov 11, 2014 at 10:04:18PM +0100, Jan Kara wrote:

Split ->set_xstate callback into two callbacks - one for turning quotas
on (->sysquota_on) and one for turning quotas off (->sysquota_off). That
way we don't have to pass quotactl command into the callback which seems
cleaner.

Yes, I much prefer these to be split.  But the names seem a little odd,
why not enable_quota/disable_quota?

+static unsigned int generic_to_xfs_flags(unsigned int uflags)

xfs_quota_flags() ?