Robert White posted on Wed, 26 Nov 2014 15:18:26 -0800 as excerpted: > I also don't see anything in the code that says "this ioctl will create > the checksums for the selected file" so you may have to do the copy you > tried to avoid.
Note that btrfs check has an --init-csum-tree switch. In a new enough btrfs-progs, I think it even works as one might expect! (In older versions it would init the tree... by zeroing it for everything!) FWIW I'm running btrfs-progs v3.17.1 here, but I've not updated in a few days and think I might have seen someone mention v3.17.2. But I've not tested it. The normal btrfs check caution applies: Before using btrfs check in anything other than read-only mode (without any of the repair/init options), have a backup if you care about anything on the filesystem, as there's a chance it might eat it instead of fixing it. -- Duncan - List replies preferred. No HTML msgs. "Every nonfree program has a lord, a master -- and if you use the program, he is your master." Richard Stallman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
