On Mon, Apr 08, 2019 at 01:49:49PM +0000, Leonid Bloch wrote: > Thanks for letting know! Btrfs inspect-internal csum-dump indeed sounds > awesome! Recursively, on a subvolume that would be perfect. Let me know > if help is needed. Well actually the intention of this part was mostly to have a proper way of verifying the checksums we write in the checksum tree. I have a patchset in development that adds SHA-256 in the mix (it's actually very similar to the patch you've referenced). Apart from SHA-256 I want to have a not cryptographically secure checksum as well which would help detecting duplicate extents and can be used for de-duplication. But this patchset is not anywhere near I can (or better want to) show to someone. Thanks for your patience. Johannes -- Johannes Thumshirn SUSE Labs Filesystems jthumshirn@xxxxxxx +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850
