No answer here, but mate if you are involved in anything that will provide some more automated backup tool for btrfs you got a lot of silent people rooting for you.
> On 16 Jul 2016, at 00:21, Eric Wheeler <bt...@lists.ewheeler.net> wrote: > > Hello all, > > We do btrfs subvolume snapshots over time for backups. I would like to > traverse the files in the subvolumes and find the total unique chunk count > to calculate total space for a set of subvolumes. > > This sounds kind of like the beginning of what a deduplicator would do, > but I just want to count the blocks, so no submission for deduplication. > I started looking at bedup and other deduplicator code, but the answer to > this question wasn't obvious (to me, anyway). > > Questions: > > Is there an ioctl (or some other way) to get the block device offset for a > file (or file offset) so I can count the unique occurances? > > What API documentation should I review? > > Can you point me at the ioctl(s) that would handle this? > > > Thank you for your help! > > > -- > Eric Wheeler > -- > 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 -- 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
