vsock: implement ListenDatagram and DialDatagram

[mdlayher]

Add the connectionless counterparts alongside the existing connection-oriented API.

[mdlayher]

Hey @stefanha, have the datagram sockets been implemented yet? Last I was aware, I don't think they were available.

[stefanha]

On Thu, Nov 23, 2017 at 5:23 PM, Matt Layher ***@***.***> wrote: Hey @stefanha <https://github.com/stefanha>, have the datagram sockets been implemented yet? Last I was aware, I don't think they were available.

SOCK_DGRAM is not available yet. There is currently no work in this area. Stefan

[mdlayher]

There may be some work on this now: https://lwn.net/Articles/859271/.

[stefanha]

SOCK_SEQPACKET and SOCK_DGRAM are on the way but not 100% finished yet. @stefano-garzarella

[stefano-garzarella]

SOCK_SEQPACKET and SOCK_DGRAM are on the way but not 100% finished yet. @stefano-garzarella

Yep, SOCK_SEQPACKET is almost done. It is also merged in virtio-spec 1.2 and supported starting from Linux v5.14 and QEMU v6.1.

For SOCK_DGRAM, Jiang is still working on it. It hasn't landed upstream yet.

[mdlayher]

Thank you both for the updates!

[NullHypothesis]

For SOCK_DGRAM, Jiang is still working on it. It hasn't landed upstream yet.

Hey @stefano-garzarella, is there any update on this? AFAICT, there was some LKML activity back in June 2023 and I assume the patch set hasn't landed yet? Thanks!

[stefano-garzarella]

For SOCK_DGRAM, Jiang is still working on it. It hasn't landed upstream yet.

Hey @stefano-garzarella, is there any update on this? AFAICT, there was some LKML activity back in June 2023 and I assume the patch set hasn't landed yet? Thanks!

Yep, the patches are not landed yet. AFAIK @beshleman and his colleagues in ByteDance are working on that.

[beshleman]

This is true. We should see new spec/code patches out very soon (this or next month I think).

[mdlayher]

Excellent news! Happy to incorporate dgram mode as appropriate once the kernel APIs are ready to go.