I want to write a differential backup tool for btrfs snapshots. The new "btrfs subvol find-new"-command sounds great on first encounter, but I'm missing informations about updated directories. I would need a list of updated directories to scan for deleted files. I had a look at find_updated_files() in btrfs-list.c. To me it seems as if the ioctl would only return the extents of regular files. The function find_root_gen() in btrfs-list.c seems to return the newest generation in a given snapshot. It would be nice to have this exported as a user command (e.g. "btrfs subvol newest-gen") then one could use the output of btrfs subvol newest-gen <old snapshot> (plus 1) as the input generation number to btrfs subvol find-new <new snapshot> <gen+1> (I'm using kernel 2.6.32.10 with the most current btrfs-kernel modules and userland tools as of last Saturday.) Greetings, Michael -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
