On Tue, Mar 15, 2022 at 11:25:51AM +0800, Longpeng(Mike) wrote:
From: Longpeng <longpeng2@xxxxxxxxxx>
- GET_CONFIG_SIZE: return the size of the virtio config space.
The size contains the fields which are conditional on feature
bits.
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Longpeng <longpeng2@xxxxxxxxxx>
---
drivers/vhost/vdpa.c | 17 +++++++++++++++++
include/linux/vdpa.h | 3 ++-
include/uapi/linux/vhost.h | 4 ++++
3 files changed, 23 insertions(+), 1 deletion(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index ec5249e..605c7ae 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -355,6 +355,20 @@ static long vhost_vdpa_get_iova_range(struct vhost_vdpa *v, u32 __user *argp)
return 0;
}
+static long vhost_vdpa_get_config_size(struct vhost_vdpa *v, u32 __user *argp)
+{
+ struct vdpa_device *vdpa = v->vdpa;
+ const struct vdpa_config_ops *ops = vdpa->config;
+ u32 size;
+
+ size = ops->get_config_size(vdpa);
get_config_size() returns a size_t, perhaps we could have a comment here
where we say we don't expect there to be an overflow.
I don't have a strong opinion on this, and I wouldn't want to get you to
repin just for that, so:
Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
