On Thu, Jan 28, 2021 at 11:11:49AM +0800, Jason Wang wrote:
On 2021/1/27 下午4:57, Stefano Garzarella wrote:
On Wed, Jan 27, 2021 at 11:33:03AM +0800, Jason Wang wrote:
On 2021/1/20 下午7:08, Stefano Garzarella wrote:
On Wed, Jan 20, 2021 at 11:46:38AM +0800, Jason Wang wrote:
On 2021/1/19 下午12:59, Xie Yongji wrote:
With VDUSE, we should be able to support all kinds of virtio devices.
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
---
drivers/vhost/vdpa.c | 29 +++--------------------------
1 file changed, 3 insertions(+), 26 deletions(-)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 29ed4173f04e..448be7875b6d 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -22,6 +22,7 @@
#include <linux/nospec.h>
#include <linux/vhost.h>
#include <linux/virtio_net.h>
+#include <linux/virtio_blk.h>
#include "vhost.h"
@@ -185,26 +186,6 @@ static long
vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user
*statusp)
return 0;
}
-static int vhost_vdpa_config_validate(struct vhost_vdpa *v,
- struct vhost_vdpa_config *c)
-{
- long size = 0;
-
- switch (v->virtio_id) {
- case VIRTIO_ID_NET:
- size = sizeof(struct virtio_net_config);
- break;
- }
-
- if (c->len == 0)
- return -EINVAL;
-
- if (c->len > size - c->off)
- return -E2BIG;
-
- return 0;
-}
I think we should use a separate patch for this.
For the vdpa-blk simulator I had the same issues and I'm adding
a .get_config_size() callback to vdpa devices.
Do you think make sense or is better to remove this check in
vhost/vdpa, delegating the boundaries checks to
get_config/set_config callbacks.
A question here. How much value could we gain from
get_config_size() consider we can let vDPA parent to validate the
length in its get_config().
I agree, most of the implementations already validate the length,
the only gain is an error returned since get_config() is void, but
eventually we can add a return value to it.
Right, one problem here is that. For the virito path, its get_config()
returns void. So we can not propagate error to virtio drivers. But it
might not be a big issue since we trust kernel virtio driver.
So I think it makes sense to change the return value in the vdpa config ops.
Thanks for your feedback!
@Xie do you plan to do this?
Otherwise I can do in my vdpa-blk-sim series, where for now I used this
patch as is.
Thanks,
Stefano
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