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authorZhu Lingshan <lingshan.zhu@intel.com>2024-02-19 02:55:57 +0800
committerMichael S. Tsirkin <mst@redhat.com>2024-03-19 02:45:51 -0400
commitc2475a9a789721bfdcc1b16aaf61ccfecb891914 (patch)
treea984cafce3c3878cdc73e72838fe3bf254b868e6 /drivers/vdpa
parent2b666ee29618f452b84aeacf08e1267894de7234 (diff)
vDPA: report virtio-block capacity to user space
This commit allows userspace to query capacity of a virtio-block device. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Message-Id: <20240218185606.13509-2-lingshan.zhu@intel.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index c73c06102e7e..613bec31f59e 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -945,6 +945,38 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms
}
static int
+vdpa_dev_blk_capacity_config_fill(struct sk_buff *msg,
+ const struct virtio_blk_config *config)
+{
+ u64 val_u64;
+
+ val_u64 = __virtio64_to_cpu(true, config->capacity);
+
+ return nla_put_u64_64bit(msg, VDPA_ATTR_DEV_BLK_CFG_CAPACITY,
+ val_u64, VDPA_ATTR_PAD);
+}
+
+static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
+ struct sk_buff *msg)
+{
+ struct virtio_blk_config config = {};
+ u64 features_device;
+
+ vdev->config->get_config(vdev, 0, &config, sizeof(config));
+
+ features_device = vdev->config->get_device_features(vdev);
+
+ if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_FEATURES, features_device,
+ VDPA_ATTR_PAD))
+ return -EMSGSIZE;
+
+ if (vdpa_dev_blk_capacity_config_fill(msg, &config))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+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)
{
@@ -988,6 +1020,9 @@ vdpa_dev_config_fill(struct vdpa_device *vdev, struct sk_buff *msg, u32 portid,
case VIRTIO_ID_NET:
err = vdpa_dev_net_config_fill(vdev, msg);
break;
+ case VIRTIO_ID_BLOCK:
+ err = vdpa_dev_blk_config_fill(vdev, msg);
+ break;
default:
err = -EOPNOTSUPP;
break;