On Mon, Oct 12, 2015 at 12:58:49AM +0200, Andreas Gruenbacher wrote:

From: Andreas Gruenbacher <agruenba@redhat.com>

Some remote file systems like nfs may return user or group identifiers
that cannot be mapped to local uids / gids.  Allow to represent such
unmapped identifiers in richacls.  (We still cannot represent unmapped
owners and owning groups, however.)

In the in-memory representation, the richacl is followed by a list of
NUL-terminated strings, with no padding.  Entries with an unmapped
identifier have the RICHACE_UNMAPPED_WHO flag set, and ace->e_id.offs
specifies the offset into this list.  Multiple entries can refer to the
same offset.

The xattr representation is similar, but ace->e_id is ignored, and the
list of unmapped identifier strings contains a string for each acl entry
whose RICHACE_UNMAPPED_WHO flag is set.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

....

+/**
+ * richacl_has_unmapped_identifiers
+ *
+ * Check if an acl has unmapped identifiers.
+ */
+bool richacl_has_unmapped_identifiers(struct richacl *acl)
+{
+	struct richace *ace;
+
+	richacl_for_each_entry(ace, acl) {
+		if (ace->e_flags & RICHACE_UNMAPPED_WHO)
+			return true;
+	}
+	return false;
+}
+EXPORT_SYMBOL_GPL(richacl_has_unmapped_identifiers);

This was used by the XFS support patch earlier in the series. Bisect
problem here...

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

_______________________________________________
xfs mailing list
xfs@oss.sgi.com
http://oss.sgi.com/mailman/listinfo/xfs