On Thu, 27 Feb 2020 01:22:11 -0800 Zach Reizner <za...@google.com> wrote:
> On Thu, Feb 27, 2020 at 1:09 AM Boris Brezillon > <boris.brezil...@collabora.com> wrote: > > > > What's not entirely clear is whether we need to support cases where the > > host create its own resources (without being asked by the guest) and > > decides to pass them to a virtio-ipc-connection (through the unix <-> > > virtio-ipc bridge). If that's needed, we need interfaces to let host > > apps import their resources in the VM (again, those interfaces are > > likely to be resource-type dependent). > > When the wayland compositor sends the keyboard map or requests > clipboard content, the compositor (or another client on the host) will > create a resource (shm or pipe) and send it over the unix domain > socket. Would this be a case of the above situation you mentioned > above? It seems like we need to support the host creating resources > passed over the virtio-ipc-connection. Okay. There's also another problem I noticed just now: every time an FD is passed on a unix socket a new FD is created on the receiver's side, even if the receiver already has an opened-FD pointing to the exact same file, which means we can't easily create an FD <-> virtio-resource mapping on the host (there's this kcmp() [1] syscall, but it doesn't seem to have a wrapper in glibc which is not a good sign, plus you need to enable CONFIG_CHECKPOINT_RESTORE). [1]http://man7.org/linux/man-pages/man2/kcmp.2.html --------------------------------------------------------------------- To unsubscribe, e-mail: virtio-dev-unsubscr...@lists.oasis-open.org For additional commands, e-mail: virtio-dev-h...@lists.oasis-open.org
