Re: [PATCH RFC v2 3/8] vsock/virtio: implement the datagram data path

[sashiko-bot@kernel.org]

> Add the datagram feature bit and packet type, and implement the common
> virtio transport operations needed to bind, send, and receive
> datagrams.
> 
> Send each message as an OP_RW packet with a maximum 64 KiB payload,
> including support for empty messages. Bound pending sends by the
> socket send buffer instead of connection-oriented peer credits. Use
> the socket's skb memory charge for datagram SIOCOUTQ, including empty
> messages, and release it through the normal skb ownership lifetime on
> completion, rejection, or queued drops.
> 
> Deliver incoming datagrams through the datagram bound-socket lookup
> without entering the connection state machine. Connection-oriented
> receive lookup excludes datagram sockets, so each class can use the
> same destination CID and port. Validate the transport and connected
> peer under the socket lock, including after shutdown, and silently
> discard undeliverable messages. Use the socket datagram queue for
> recvmsg(), including source addresses, peeking, and truncation
> reporting based on the payload length after socket filtering. Reject
> MSG_OOB and MSG_ERRQUEUE before accessing the receive queue. Reject
> datagram sockmap admission until its receive callbacks support it.
> 
> Signed-off-by: Sergio Lopez <slp@redhat.com>

Sashiko has reviewed this patch and found no issues.

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