On Tue, Apr 11, 2017 at 10:48:28PM -0700, Christoph Hellwig wrote: > On Tue, Apr 11, 2017 at 10:43:26PM +0200, Richard Weinberger wrote: > > Artem, do you remember why UBIFS didn't set s_uuid in first place? > > It's an extremely odd field - only a hand full of file systems set it > (e.g. XFS doesn't, although according to Mimi IMA supports XFS), and > it's never even used outside of the IMA/EVM code. > > We really need a feature flag that this field is valid that IMA can > check before adding more support for it. It seems to be used by mm/cleancache.c void __cleancache_init_shared_fs() but this affects only ocfs2. So, if some flag should be implemented, who should do it? :) If me, what flag should be created? -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
