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[PATCH v8 11/12] vdpa: Add virtio-net mac address via CVQ at start
From: |
Eugenio Pérez |
Subject: |
[PATCH v8 11/12] vdpa: Add virtio-net mac address via CVQ at start |
Date: |
Tue, 9 Aug 2022 19:39:25 +0200 |
This is needed so the destination vdpa device see the same state a the
guest set in the source.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
v8:
* Delete unneeded copy from device's in buffer.
v6:
* Map and unmap command buffers at the start and end of device usage.
v5:
* Rename s/start/load/
* Use independent NetClientInfo to only add load callback on cvq.
---
net/vhost-vdpa.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index df85567cff..e775957952 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -363,11 +363,52 @@ static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s,
size_t out_len,
return vhost_svq_poll(svq);
}
+static int vhost_vdpa_net_load(NetClientState *nc)
+{
+ VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
+ struct vhost_vdpa *v = &s->vhost_vdpa;
+ VirtIONet *n;
+ uint64_t features;
+
+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
+
+ if (!v->shadow_vqs_enabled) {
+ return 0;
+ }
+
+ n = VIRTIO_NET(v->dev->vdev);
+ features = v->dev->vdev->host_features;
+ if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) {
+ const struct virtio_net_ctrl_hdr ctrl = {
+ .class = VIRTIO_NET_CTRL_MAC,
+ .cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET,
+ };
+ char *cursor = s->cvq_cmd_out_buffer;
+ ssize_t dev_written;
+
+ memcpy(cursor, &ctrl, sizeof(ctrl));
+ cursor += sizeof(ctrl);
+ memcpy(cursor, n->mac, sizeof(n->mac));
+ cursor += sizeof(n->mac);
+
+ dev_written = vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + sizeof(n->mac),
+ sizeof(virtio_net_ctrl_ack));
+ if (unlikely(dev_written < 0)) {
+ return dev_written;
+ }
+
+ return *((virtio_net_ctrl_ack *)s->cvq_cmd_in_buffer) != VIRTIO_NET_OK;
+ }
+
+ return 0;
+}
+
static NetClientInfo net_vhost_vdpa_cvq_info = {
.type = NET_CLIENT_DRIVER_VHOST_VDPA,
.size = sizeof(VhostVDPAState),
.receive = vhost_vdpa_receive,
.start = vhost_vdpa_net_cvq_start,
+ .load = vhost_vdpa_net_load,
.stop = vhost_vdpa_net_cvq_stop,
.cleanup = vhost_vdpa_cleanup,
.has_vnet_hdr = vhost_vdpa_has_vnet_hdr,
--
2.31.1
- [PATCH v8 04/12] vhost: Do not depend on !NULL VirtQueueElement on vhost_svq_flush, (continued)
- [PATCH v8 04/12] vhost: Do not depend on !NULL VirtQueueElement on vhost_svq_flush, Eugenio Pérez, 2022/08/09
- [PATCH v8 06/12] vhost_net: Add NetClientInfo stop callback, Eugenio Pérez, 2022/08/09
- [PATCH v8 09/12] vdpa: extract vhost_vdpa_net_cvq_add from vhost_vdpa_net_handle_ctrl_avail, Eugenio Pérez, 2022/08/09
- [PATCH v8 08/12] vdpa: Move command buffers map to start of net device, Eugenio Pérez, 2022/08/09
- [PATCH v8 07/12] vdpa: add net_vhost_vdpa_cvq_info NetClientInfo, Eugenio Pérez, 2022/08/09
- [PATCH v8 10/12] vhost_net: add NetClientState->load() callback, Eugenio Pérez, 2022/08/09
- [PATCH v8 11/12] vdpa: Add virtio-net mac address via CVQ at start,
Eugenio Pérez <=
- [PATCH v8 12/12] vdpa: Delete CVQ migration blocker, Eugenio Pérez, 2022/08/09
- Re: [PATCH v8 00/12] NIC vhost-vdpa state restore via Shadow CVQ, Eugenio Perez Martin, 2022/08/11