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[PATCH] vhost-vsock: fix migration issue when seqpacket is supported
From: |
Stefano Garzarella |
Subject: |
[PATCH] vhost-vsock: fix migration issue when seqpacket is supported |
Date: |
Tue, 7 Sep 2021 14:49:35 +0200 |
Commit 1e08fd0a46 ("vhost-vsock: SOCK_SEQPACKET feature bit support")
enabled the SEQPACKET feature bit.
This commit is released with QEMU 6.1, so if we try to migrate a VM where
the host kernel supports SEQPACKET but machine type version is less than
6.1, we get the following errors:
Features 0x130000002 unsupported. Allowed features: 0x179000000
Failed to load virtio-vhost_vsock:virtio
error while loading state for instance 0x0 of device
'0000:00:05.0/virtio-vhost_vsock'
load of migration failed: Operation not permitted
Let's disable the feature bit for machine types < 6.1, adding a
`features` field to VHostVSock to simplify the handling of upcoming
features we will support.
Fixes: 1e08fd0a46 ("vhost-vsock: SOCK_SEQPACKET feature bit support")
Cc: qemu-stable@nongnu.org
Reported-by: Jiang Wang <jiang.wang@bytedance.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
include/hw/virtio/vhost-vsock.h | 1 +
hw/core/machine.c | 1 +
hw/virtio/vhost-vsock.c | 6 +++++-
3 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/include/hw/virtio/vhost-vsock.h b/include/hw/virtio/vhost-vsock.h
index 84f4e727c7..7da92a8883 100644
--- a/include/hw/virtio/vhost-vsock.h
+++ b/include/hw/virtio/vhost-vsock.h
@@ -29,6 +29,7 @@ struct VHostVSock {
/*< private >*/
VHostVSockCommon parent;
VHostVSockConf conf;
+ uint64_t features;
/*< public >*/
};
diff --git a/hw/core/machine.c b/hw/core/machine.c
index 067f42b528..7e2851feb9 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -46,6 +46,7 @@ GlobalProperty hw_compat_6_0[] = {
{ "nvme-ns", "eui64-default", "off"},
{ "e1000", "init-vet", "off" },
{ "e1000e", "init-vet", "off" },
+ { "vhost-vsock-device", "seqpacket", "off" },
};
const size_t hw_compat_6_0_len = G_N_ELEMENTS(hw_compat_6_0);
diff --git a/hw/virtio/vhost-vsock.c b/hw/virtio/vhost-vsock.c
index 1b1a5c70ed..9458d4eeb4 100644
--- a/hw/virtio/vhost-vsock.c
+++ b/hw/virtio/vhost-vsock.c
@@ -114,8 +114,10 @@ static uint64_t vhost_vsock_get_features(VirtIODevice
*vdev,
Error **errp)
{
VHostVSockCommon *vvc = VHOST_VSOCK_COMMON(vdev);
+ VHostVSock *vsock = VHOST_VSOCK(vdev);
+
+ requested_features |= vsock->features;
- virtio_add_feature(&requested_features, VIRTIO_VSOCK_F_SEQPACKET);
return vhost_get_features(&vvc->vhost_dev, feature_bits,
requested_features);
}
@@ -218,6 +220,8 @@ static void vhost_vsock_device_unrealize(DeviceState *dev)
static Property vhost_vsock_properties[] = {
DEFINE_PROP_UINT64("guest-cid", VHostVSock, conf.guest_cid, 0),
DEFINE_PROP_STRING("vhostfd", VHostVSock, conf.vhostfd),
+ DEFINE_PROP_BIT64("seqpacket", VHostVSock, features,
+ VIRTIO_VSOCK_F_SEQPACKET, true),
DEFINE_PROP_END_OF_LIST(),
};
--
2.31.1
- [PATCH] vhost-vsock: fix migration issue when seqpacket is supported,
Stefano Garzarella <=
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Daniel P . Berrangé, 2021/09/07
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Michael S. Tsirkin, 2021/09/09
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Daniel P . Berrangé, 2021/09/09
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Michael S. Tsirkin, 2021/09/10
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Stefano Garzarella, 2021/09/13
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Michael S. Tsirkin, 2021/09/13
- Re: [PATCH] vhost-vsock: fix migration issue when seqpacket is supported, Stefano Garzarella, 2021/09/14