On Mon, Sep 01, 2008 at 10:43:07AM +0100, David Woodhouse wrote: > On Sun, 2008-08-31 at 17:52 +0300, Artem Bityutskiy wrote: > > From: Artem Bityutskiy <Artem.Bityutskiy@xxxxxxxxx> > > > > UBIFS stores 16-bit UUID in the superblock, and it is a good > > idea to return part of it in 'f_fsid' filed of kstatfs structure. > > I think you mean a 16-byte UUID, not 16-bit? > > > + memcpy(&buf->f_fsid, c->uuid, sizeof(__kernel_fsid_t)); > > For btrfs I xor the first 64 bits with the second 64 bits, and put > _that_ into f_fsid. You're just putting the first 64 bits in and > ignoring the second 64 bits. Neither is really _better_ than the other; > you just alter the circumstances in which you get collisions. But I > suppose we might as well be consistent about how we do it? XFS just puts in the st_dev. And I can't realy find any useful defintion of what it's supposed to b anyway.. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
