On Tue, Apr 11, 2017 at 1:15 PM, Amin Hassani <ahass...@chromium.org> wrote: > Hi, > > I am working on a project with Btrfs and I was wondering if there is > any way to see the disk layout of the btrfs image. Let's assume I have > a read-only btrfs image with compression on and only using one disk > (no raid or anything). Is it possible to get a set of offset-lengths > for each file or metadata parts of the image. I know there is an > unfinished documentation for On-disk Formant in here: > https://btrfs.wiki.kernel.org/index.php/On-disk_Format > But it is not complete and does not show what I am looking for. Is > there any other documentation on this? Is there any public API that I > can use to get this information. For example can I iterate on all > files starting from the root node and get all offset-lengths? This way > any part that doesn't come can be assumed as metadata. I don't really > care what is inside the metadata, I just want to know their > offset-lengths in the file system.
btrfs-debug-tree contains this information in human readable form. There's also btrfs-heatmap https://github.com/knorrie/btrfs-heatmap -- Chris Murphy -- 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
