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vhost: add method vhost_set_vring_err

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Kernel and user vhost may report virtqueue errors via eventfd.
This is only reliable way to get notification about protocol error.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Message-Id: <20220623161325.18813-2-vsementsov@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Roman Kagan <rvkagan@yandex-team.ru>
This commit is contained in:
Konstantin Khlebnikov 2022-06-23 19:13:24 +03:00 • committed by Michael S. Tsirkin
parent 71e3d00482
commit 60dc3c5be9
3 changed files with 16 additions and 0 deletions
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7
hw/virtio/vhost-backend.c
View file

@ -146,6 +146,12 @@ static int vhost_kernel_set_vring_call(struct vhost_dev *dev,
return vhost_kernel_call(dev, VHOST_SET_VRING_CALL, file);
}
static int vhost_kernel_set_vring_err(struct vhost_dev *dev,
struct vhost_vring_file *file)
{
return vhost_kernel_call(dev, VHOST_SET_VRING_ERR, file);
}
static int vhost_kernel_set_vring_busyloop_timeout(struct vhost_dev *dev,
struct vhost_vring_state *s)
{
@ -309,6 +315,7 @@ const VhostOps kernel_ops = {
.vhost_get_vring_base = vhost_kernel_get_vring_base,
.vhost_set_vring_kick = vhost_kernel_set_vring_kick,
.vhost_set_vring_call = vhost_kernel_set_vring_call,
.vhost_set_vring_err = vhost_kernel_set_vring_err,
.vhost_set_vring_busyloop_timeout =
vhost_kernel_set_vring_busyloop_timeout,
.vhost_set_features = vhost_kernel_set_features,