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vDPA: only report driver features if FEATURES_OK is set

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This commit reports driver features to user space
only after FEATURES_OK is features negotiation is done.

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Message-Id: <20220929014555.112323-3-lingshan.zhu@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Zhu Lingshan 2022-09-29 09:45:51 +08:00 committed by Michael S. Tsirkin
parent 228565100d
commit c6dac2ecfa
1 changed files with 14 additions and 6 deletions
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20
drivers/vdpa/vdpa.c
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@ -820,7 +820,7 @@ static int vdpa_dev_net_mq_config_fill(struct vdpa_device *vdev,
static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *msg)
{
struct virtio_net_config config = {};
u64 features_device, features_driver;
u64 features_device;
u16 val_u16;
vdev->config->get_config(vdev, 0, &config, sizeof(config));
@ -837,11 +837,6 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms
if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_CFG_MTU, val_u16))
return -EMSGSIZE;
features_driver = vdev->config->get_driver_features(vdev);
if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_NEGOTIATED_FEATURES, features_driver,
VDPA_ATTR_PAD))
return -EMSGSIZE;
features_device = vdev->config->get_device_features(vdev);
if (nla_put_u64_64bit(msg, VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES, features_device,
@ -855,6 +850,8 @@ static int
vdpa_dev_config_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid, u32 seq,
int flags, struct netlink_ext_ack *extack)
{
u64 features_driver;
u8 status = 0;
u32 device_id;
void *hdr;
int err;
@ -878,6 +875,17 @@ vdpa_dev_config_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid,
goto msg_err;
}
/* only read driver features after the feature negotiation is done */
status = vdev->config->get_status(vdev);
if (status & VIRTIO_CONFIG_S_FEATURES_OK) {
features_driver = vdev->config->get_driver_features(vdev);
if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_NEGOTIATED_FEATURES, features_driver,
VDPA_ATTR_PAD)) {
err = -EMSGSIZE;
goto msg_err;
}
}
switch (device_id) {
case VIRTIO_ID_NET:
err = vdpa_dev_net_config_fill(vdev, msg);