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vdpa: conditionally read STATUS in config space

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The spec says:
    status only exists if VIRTIO_NET_F_STATUS is set

Similar to MAC and MTU, vdpa_dev_net_config_fill() should read
STATUS conditionally depending on the feature bits.

Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Eli Cohen <elic@nvidia.com>
Message-Id: <1675725124-7375-3-git-send-email-si-wei.liu@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Si-Wei Liu 2023-02-06 15:12:00 -08:00 committed by Michael S. Tsirkin
parent 275487b4be
commit 6e6d39830b
1 changed files with 15 additions and 5 deletions
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20
drivers/vdpa/vdpa.c
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@ -848,18 +848,25 @@ static int vdpa_dev_net_mac_config_fill(struct sk_buff *msg, u64 features,
sizeof(config->mac), config->mac);
}
static int vdpa_dev_net_status_config_fill(struct sk_buff *msg, u64 features,
const struct virtio_net_config *config)
{
u16 val_u16;
if ((features & BIT_ULL(VIRTIO_NET_F_STATUS)) == 0)
return 0;
val_u16 = __virtio16_to_cpu(true, config->status);
return nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16);
}
static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *msg)
{
struct virtio_net_config config = {};
u64 features_device;
u16 val_u16;
vdev->config->get_config(vdev, 0, &config, sizeof(config));
val_u16 = __virtio16_to_cpu(true, config.status);
if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16))
return -EMSGSIZE;
features_device = vdev->config->get_device_features(vdev);
if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_FEATURES, features_device,
@ -872,6 +879,9 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms
if (vdpa_dev_net_mac_config_fill(msg, features_device, &config))
return -EMSGSIZE;
if (vdpa_dev_net_status_config_fill(msg, features_device, &config))
return -EMSGSIZE;
return vdpa_dev_net_mq_config_fill(msg, features_device, &config);
}