[PATCH] xfs: fix sgid inheritance for subdirectories inheriting default acls

[Christoph Hellwig]

On Tue, Jun 18, 2013 at 03:53:51PM +1000, Dave Chinner wrote:
> > I'd rather opencode updating the mode here, it's really just a tiny bit
> > of boilerplate code.
> 
> Needs a transaction, though. Right now, there's no transaction code
> at all in xfs_acl.c and I'd kind of like to keep it that way as it's
> just a translation layer....

True.  Maybe as a quick hack just extend the meaning of XFS_ATTR_NOACL
to also not do the checks?  It's already the magic flag to mean that
we are called from the ACL code.

Alternatively move all of xfs_set_mode, or at least everything around
the "if (mode != inode->i_mode) " to xfs_iops.c.