On Thu, May 8, 2025 at 12:57 AM Amir Goldstein <amir73il@xxxxxxxxx> wrote: > It means everything to userspace. > backing ids are part of the userspace UAPI - you have documented it yourself. > The fuse server used backing ids to manage access to backing files > https://github.com/libfuse/libfuse/blob/master/example/passthrough_hp.cc#L855 Oh, I see. > This is extra and nice to have. > It can show admin which files are using fuse passthrough. > It cannot replace displaying all backing ids under connection > because server can register backing ids without using them to open files > and most importantly server can leak backing ids, which is a good > reason to kill it. I will have a try later.
