Parav Pandit
2022-Jun-13 20:37 UTC
[PATCH V2 3/6] vDPA: allow userspace to query features of a vDPA device
> From: Zhu Lingshan <lingshan.zhu at intel.com> > Sent: Monday, June 13, 2022 6:17 AM > > This commit adds a new vDPA netlink attribution > VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES. Userspace can query > features of vDPA devices through this new attr. > > Signed-off-by: Zhu Lingshan <lingshan.zhu at intel.com> > --- > drivers/vdpa/vdpa.c | 13 +++++++++---- > include/uapi/linux/vdpa.h | 1 + > 2 files changed, 10 insertions(+), 4 deletions(-) > > diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index > ebf2f363fbe7..9b0e39b2f022 100644 > --- a/drivers/vdpa/vdpa.c > +++ b/drivers/vdpa/vdpa.c > @@ -815,7 +815,7 @@ 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; > + u64 features_device, features_driver; > u16 val_u16; > > vdpa_get_config_unlocked(vdev, 0, &config, sizeof(config)); @@ - > 832,12 +832,17 @@ 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 = vdev->config->get_driver_features(vdev); > - if (nla_put_u64_64bit(msg, > VDPA_ATTR_DEV_NEGOTIATED_FEATURES, features, > + 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, > VDPA_ATTR_PAD)) > return -EMSGSIZE; > > - return vdpa_dev_net_mq_config_fill(vdev, msg, features, &config); > + return vdpa_dev_net_mq_config_fill(vdev, msg, features_driver, > +&config); > } > > static int > diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h index > 25c55cab3d7c..39f1c3d7c112 100644 > --- a/include/uapi/linux/vdpa.h > +++ b/include/uapi/linux/vdpa.h > @@ -47,6 +47,7 @@ enum vdpa_attr { > VDPA_ATTR_DEV_NEGOTIATED_FEATURES, /* u64 */ > VDPA_ATTR_DEV_MGMTDEV_MAX_VQS, /* u32 */ > VDPA_ATTR_DEV_SUPPORTED_FEATURES, /* u64 */ > + VDPA_ATTR_VDPA_DEV_SUPPORTED_FEATURES, /* u64 */ >How is this different than VDPA_ATTR_DEV_SUPPORTED_FEATURES?