forked from rpms/qemu-kvm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
170 lines
6.5 KiB
170 lines
6.5 KiB
From 49e91b34b62f5da147fa2fb80d203dd675c48f64 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
|
|
Date: Thu, 21 Jul 2022 15:38:55 +0200
|
|
Subject: [PATCH 09/32] virtio-net: Expose ctrl virtqueue logic
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Eugenio Pérez <eperezma@redhat.com>
|
|
RH-MergeRequest: 108: Net Control Virtqueue shadow Support
|
|
RH-Commit: [9/27] c4ab1e35f4ca728df82a687763c662369282c513 (eperezmartin/qemu-kvm)
|
|
RH-Bugzilla: 1939363
|
|
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
|
|
RH-Acked-by: Cindy Lu <lulu@redhat.com>
|
|
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/1939363
|
|
|
|
Upstream Status: git://git.qemu.org/qemu.git
|
|
|
|
commit 640b8a1c588b56349b3307d88459ea1cd86181fb
|
|
Author: Eugenio Pérez <eperezma@redhat.com>
|
|
Date: Wed Jul 20 08:59:28 2022 +0200
|
|
|
|
virtio-net: Expose ctrl virtqueue logic
|
|
|
|
This allows external vhost-net devices to modify the state of the
|
|
VirtIO device model once the vhost-vdpa device has acknowledged the
|
|
control commands.
|
|
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
|
|
Signed-off-by: Jason Wang <jasowang@redhat.com>
|
|
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
---
|
|
hw/net/virtio-net.c | 84 ++++++++++++++++++++--------------
|
|
include/hw/virtio/virtio-net.h | 4 ++
|
|
2 files changed, 53 insertions(+), 35 deletions(-)
|
|
|
|
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
|
|
index 2a127f0a3b..59bedba681 100644
|
|
--- a/hw/net/virtio-net.c
|
|
+++ b/hw/net/virtio-net.c
|
|
@@ -1433,57 +1433,71 @@ static int virtio_net_handle_mq(VirtIONet *n, uint8_t cmd,
|
|
return VIRTIO_NET_OK;
|
|
}
|
|
|
|
-static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
|
|
+size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev,
|
|
+ const struct iovec *in_sg, unsigned in_num,
|
|
+ const struct iovec *out_sg,
|
|
+ unsigned out_num)
|
|
{
|
|
VirtIONet *n = VIRTIO_NET(vdev);
|
|
struct virtio_net_ctrl_hdr ctrl;
|
|
virtio_net_ctrl_ack status = VIRTIO_NET_ERR;
|
|
- VirtQueueElement *elem;
|
|
size_t s;
|
|
struct iovec *iov, *iov2;
|
|
- unsigned int iov_cnt;
|
|
+
|
|
+ if (iov_size(in_sg, in_num) < sizeof(status) ||
|
|
+ iov_size(out_sg, out_num) < sizeof(ctrl)) {
|
|
+ virtio_error(vdev, "virtio-net ctrl missing headers");
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ iov2 = iov = g_memdup2(out_sg, sizeof(struct iovec) * out_num);
|
|
+ s = iov_to_buf(iov, out_num, 0, &ctrl, sizeof(ctrl));
|
|
+ iov_discard_front(&iov, &out_num, sizeof(ctrl));
|
|
+ if (s != sizeof(ctrl)) {
|
|
+ status = VIRTIO_NET_ERR;
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_RX) {
|
|
+ status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, out_num);
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) {
|
|
+ status = virtio_net_handle_mac(n, ctrl.cmd, iov, out_num);
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
|
|
+ status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, out_num);
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) {
|
|
+ status = virtio_net_handle_announce(n, ctrl.cmd, iov, out_num);
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
|
|
+ status = virtio_net_handle_mq(n, ctrl.cmd, iov, out_num);
|
|
+ } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) {
|
|
+ status = virtio_net_handle_offloads(n, ctrl.cmd, iov, out_num);
|
|
+ }
|
|
+
|
|
+ s = iov_from_buf(in_sg, in_num, 0, &status, sizeof(status));
|
|
+ assert(s == sizeof(status));
|
|
+
|
|
+ g_free(iov2);
|
|
+ return sizeof(status);
|
|
+}
|
|
+
|
|
+static void virtio_net_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
|
|
+{
|
|
+ VirtQueueElement *elem;
|
|
|
|
for (;;) {
|
|
+ size_t written;
|
|
elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
|
|
if (!elem) {
|
|
break;
|
|
}
|
|
- if (iov_size(elem->in_sg, elem->in_num) < sizeof(status) ||
|
|
- iov_size(elem->out_sg, elem->out_num) < sizeof(ctrl)) {
|
|
- virtio_error(vdev, "virtio-net ctrl missing headers");
|
|
+
|
|
+ written = virtio_net_handle_ctrl_iov(vdev, elem->in_sg, elem->in_num,
|
|
+ elem->out_sg, elem->out_num);
|
|
+ if (written > 0) {
|
|
+ virtqueue_push(vq, elem, written);
|
|
+ virtio_notify(vdev, vq);
|
|
+ g_free(elem);
|
|
+ } else {
|
|
virtqueue_detach_element(vq, elem, 0);
|
|
g_free(elem);
|
|
break;
|
|
}
|
|
-
|
|
- iov_cnt = elem->out_num;
|
|
- iov2 = iov = g_memdup2(elem->out_sg,
|
|
- sizeof(struct iovec) * elem->out_num);
|
|
- s = iov_to_buf(iov, iov_cnt, 0, &ctrl, sizeof(ctrl));
|
|
- iov_discard_front(&iov, &iov_cnt, sizeof(ctrl));
|
|
- if (s != sizeof(ctrl)) {
|
|
- status = VIRTIO_NET_ERR;
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_RX) {
|
|
- status = virtio_net_handle_rx_mode(n, ctrl.cmd, iov, iov_cnt);
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_MAC) {
|
|
- status = virtio_net_handle_mac(n, ctrl.cmd, iov, iov_cnt);
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_VLAN) {
|
|
- status = virtio_net_handle_vlan_table(n, ctrl.cmd, iov, iov_cnt);
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_ANNOUNCE) {
|
|
- status = virtio_net_handle_announce(n, ctrl.cmd, iov, iov_cnt);
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_MQ) {
|
|
- status = virtio_net_handle_mq(n, ctrl.cmd, iov, iov_cnt);
|
|
- } else if (ctrl.class == VIRTIO_NET_CTRL_GUEST_OFFLOADS) {
|
|
- status = virtio_net_handle_offloads(n, ctrl.cmd, iov, iov_cnt);
|
|
- }
|
|
-
|
|
- s = iov_from_buf(elem->in_sg, elem->in_num, 0, &status, sizeof(status));
|
|
- assert(s == sizeof(status));
|
|
-
|
|
- virtqueue_push(vq, elem, sizeof(status));
|
|
- virtio_notify(vdev, vq);
|
|
- g_free(iov2);
|
|
- g_free(elem);
|
|
}
|
|
}
|
|
|
|
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
|
|
index cce1c554f7..ef234ffe7e 100644
|
|
--- a/include/hw/virtio/virtio-net.h
|
|
+++ b/include/hw/virtio/virtio-net.h
|
|
@@ -221,6 +221,10 @@ struct VirtIONet {
|
|
struct EBPFRSSContext ebpf_rss;
|
|
};
|
|
|
|
+size_t virtio_net_handle_ctrl_iov(VirtIODevice *vdev,
|
|
+ const struct iovec *in_sg, unsigned in_num,
|
|
+ const struct iovec *out_sg,
|
|
+ unsigned out_num);
|
|
void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
|
|
const char *type);
|
|
|
|
--
|
|
2.31.1
|
|
|