On Thu, 14 Aug 2025 at 19:19, Darrick J. Wong <djwong@xxxxxxxxxx> wrote: > What happens if you want to have a fuse server that hosts both famfs > files /and/ backing files? That'd be pretty crazy to mix both paths in > one filesystem, but it's in theory possible, particularly if the famfs > server wanted to export a pseudofile where everyone could find that > shadow file? Either FUSE_DEV_IOC_BACKING_OPEN detects what kind of object it has been handed, or we add a flag that explicitly says this is a dax dev or a block dev or a regular file. I'd prefer the latter. Thanks, Miklos