On Mon, Feb 19, 2024 at 02:55:59AM +0800, Zhu Lingshan wrote:
This commit allows reporting the block size of a
virtio-block device to user space.
Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx>
---
drivers/vdpa/vdpa.c | 18 ++++++++++++++++++
include/uapi/linux/vdpa.h | 1 +
2 files changed, 19 insertions(+)
Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index ee1472d32b0d..cc8f41d24c9c 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -970,6 +970,21 @@ vdpa_dev_blk_seg_size_config_fill(struct sk_buff *msg, u64 features,
return nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_SEG_SIZE, val_u32);
}
+/* fill the block size*/
+static int
+vdpa_dev_blk_block_size_config_fill(struct sk_buff *msg, u64 features,
+ const struct virtio_blk_config *config)
+{
+ u32 val_u32;
+
+ if ((features & BIT_ULL(VIRTIO_BLK_F_BLK_SIZE)) == 0)
+ return 0;
+
+ val_u32 = __virtio32_to_cpu(true, config->blk_size);
+
+ return nla_put_u32(msg, VDPA_ATTR_DEV_BLK_CFG_BLK_SIZE, val_u32);
+}
+
static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
struct sk_buff *msg)
{
@@ -990,6 +1005,9 @@ static int vdpa_dev_blk_config_fill(struct vdpa_device *vdev,
if (vdpa_dev_blk_seg_size_config_fill(msg, features_device, &config))
return -EMSGSIZE;
+ if (vdpa_dev_blk_block_size_config_fill(msg, features_device, &config))
+ return -EMSGSIZE;
+
return 0;
}
diff --git a/include/uapi/linux/vdpa.h b/include/uapi/linux/vdpa.h
index 586bce3c906a..f3baf7ea7d6d 100644
--- a/include/uapi/linux/vdpa.h
+++ b/include/uapi/linux/vdpa.h
@@ -58,6 +58,7 @@ enum vdpa_attr {
VDPA_ATTR_DEV_BLK_CFG_CAPACITY, /* u64 */
VDPA_ATTR_DEV_BLK_CFG_SEG_SIZE, /* u32 */
+ VDPA_ATTR_DEV_BLK_CFG_BLK_SIZE, /* u32 */
/* new attributes must be added above here */
VDPA_ATTR_MAX,
--
2.39.3
