The 03/14/2021 12:30, Christoph Hellwig wrote: > On Fri, Mar 12, 2021 at 06:44:55PM +0300, Sergei Shtepa wrote: > > DM_INTERPOSED_FLAG allow to create DM targets on "the fly". > > Underlying block device opens without a flag FMODE_EXCL. > > DM target receives bio from the original device via > > bdev_interposer. > > This is more of a philopical comment, but the idea of just letting the > interposed reopen the device by itself seems like a bad idea. I think > that is probably better hidden in the block layer interposer attachment > function, which could do the extra blkdev_get_by_dev for the caller. I suppose this cannot be implemented, since we need to change the behavior for block devices that already have been opened. -- Sergei Shtepa Veeam Software developer.
