On Fri, Jan 14, 2011 at 07:18:58AM +1100, NeilBrown wrote: > > open(O_EXCL) will fail on a block device if it is being used by anything else > - a filesystem or a dm target or an md array or .... > > So if the *only* thing you want is "is this currently an active part of > something else", then O_EXCL works since 2.6.0 (I think). Unfortunately, that won't distinguish between a currently active file system, and a device which is being used by a dm target, which is what we want to do. - Ted -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
