On Wed, Jun 14, 2023 at 12:12:56PM +0200, Jan Kara wrote: > Well, OK, I have not been precise :). Modifying a partition table (or LVM > description block) is impossible to distinguish from clobbering a > filesystem on open(2) time. Once we decide we implement arbitration of each > individual write(2), we can obviously stop writes to area covered by some > exclusively open partition. But then you are getting at the complexity > level of tracking used ranges of block devices which Darrick has suggested > and you didn't seem to like that (and neither do I). Furthermore the > protection is never going to be perfect as soon as loopback devices, device > mapper, and similar come into the mix (or it gets really really complex). > So I'd really prefer to stick with whatever arbitration we can perform on > open(2). What a shame we got rid of mandatory file locks in f7e33bdbd6d1 ;-)
