Thread (11 messages) flat view 11 messages, 2 authors, 2021-08-11

Re: [RFC PATCH v2 3/5] virito/vsock: support MSG_EOR bit processing

From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2021-08-11 09:09:14
Also in: kvm, lkml, virtualization

On Tue, Aug 10, 2021 at 02:40:32PM +0300, Arseny Krasnov wrote:
quoted hunk ↗ jump to hunk
If packet has 'EOR' bit - set MSG_EOR in 'recvmsg()' flags.

Signed-off-by: Arseny Krasnov <redacted>
---
net/vmw_vsock/virtio_transport_common.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 4d5a93beceb0..59ee1be5a6dd 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -76,8 +76,12 @@ virtio_transport_alloc_pkt(struct virtio_vsock_pkt_info *info,
			goto out;

		if (msg_data_left(info->msg) == 0 &&
-		    info->type == VIRTIO_VSOCK_TYPE_SEQPACKET)
+		    info->type == VIRTIO_VSOCK_TYPE_SEQPACKET) {
			pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOM);
+
+			if (info->msg->msg_flags & MSG_EOR)
+				pkt->hdr.flags |= cpu_to_le32(VIRTIO_VSOCK_SEQ_EOR);
+		}
	}

	trace_virtio_transport_alloc_pkt(src_cid, src_port,
@@ -460,6 +464,9 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk,
		if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOM) {
			msg_ready = true;
			vvs->msg_count--;
+
+			if (le32_to_cpu(pkt->hdr.flags) & VIRTIO_VSOCK_SEQ_EOR)
+				msg->msg_flags |= MSG_EOR;
		}

		virtio_transport_dec_rx_pkt(vvs, pkt);
-- 
2.25.1
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
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