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| author | Zhu Lingshan <lingshan.zhu@intel.com> | 2024-02-19 02:55:57 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-03-19 02:45:51 -0400 |
| commit | c2475a9a789721bfdcc1b16aaf61ccfecb891914 (patch) | |
| tree | a984cafce3c3878cdc73e72838fe3bf254b868e6 /drivers/vdpa | |
| parent | 2b666ee29618f452b84aeacf08e1267894de7234 (diff) | |
| download | linux-c2475a9a789721bfdcc1b16aaf61ccfecb891914.tar.gz | |
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.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index c73c06102e7e1..613bec31f59e1 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; |