Re: [RFC v3 03/11] vdpa: Remove the restriction that only supports virtio-net devices

With VDUSE, we should be able to support all kinds of virtio devices.

Signed-off-by: Xie Yongji <redacted>
---
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;
-}
-
static long vhost_vdpa_get_config(struct vhost_vdpa *v,
				  struct vhost_vdpa_config __user *c)
{

@@ -215,7 +196,7 @@ static long vhost_vdpa_get_config(struct vhost_vdpa *v,

	if (copy_from_user(&config, c, size))
		return -EFAULT;
-	if (vhost_vdpa_config_validate(v, &config))
+	if (config.len == 0)
		return -EINVAL;
	buf = kvzalloc(config.len, GFP_KERNEL);
	if (!buf)

@@ -243,7 +224,7 @@ static long vhost_vdpa_set_config(struct vhost_vdpa *v,

	if (copy_from_user(&config, c, size))
		return -EFAULT;
-	if (vhost_vdpa_config_validate(v, &config))
+	if (config.len == 0)
		return -EINVAL;
	buf = kvzalloc(config.len, GFP_KERNEL);
	if (!buf)

@@ -1025,10 +1006,6 @@ static int vhost_vdpa_probe(struct vdpa_device *vdpa)

	int minor;
	int r;

-	/* Currently, we only accept the network devices. */
-	if (ops->get_device_id(vdpa) != VIRTIO_ID_NET)
-		return -ENOTSUPP;
-
	v = kzalloc(sizeof(*v), GFP_KERNEL | __GFP_RETRY_MAYFAIL);
	if (!v)
		return -ENOMEM;
-- 
2.11.0