vhost-net: Free ubuf when vhost_dev_set_owner fails
Signed-off-by: Asias He <asias@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index a3645bd..354665a 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -146,6 +146,19 @@
kfree(ubufs);
}
+static void vhost_net_clear_ubuf_info(struct vhost_net *n)
+{
+
+ bool zcopy;
+ int i;
+
+ for (i = 0; i < n->dev.nvqs; ++i) {
+ zcopy = vhost_zcopy_mask & (0x1 << i);
+ if (zcopy)
+ kfree(n->vqs[i].ubuf_info);
+ }
+}
+
int vhost_net_set_ubuf_info(struct vhost_net *n)
{
bool zcopy;
@@ -1027,6 +1040,23 @@
return 0;
}
+static long vhost_net_set_owner(struct vhost_net *n)
+{
+ int r;
+
+ mutex_lock(&n->dev.mutex);
+ r = vhost_net_set_ubuf_info(n);
+ if (r)
+ goto out;
+ r = vhost_dev_set_owner(&n->dev);
+ if (r)
+ vhost_net_clear_ubuf_info(n);
+ vhost_net_flush(n);
+out:
+ mutex_unlock(&n->dev.mutex);
+ return r;
+}
+
static long vhost_net_ioctl(struct file *f, unsigned int ioctl,
unsigned long arg)
{
@@ -1055,19 +1085,15 @@
return vhost_net_set_features(n, features);
case VHOST_RESET_OWNER:
return vhost_net_reset_owner(n);
+ case VHOST_SET_OWNER:
+ return vhost_net_set_owner(n);
default:
mutex_lock(&n->dev.mutex);
- if (ioctl == VHOST_SET_OWNER) {
- r = vhost_net_set_ubuf_info(n);
- if (r)
- goto out;
- }
r = vhost_dev_ioctl(&n->dev, ioctl, argp);
if (r == -ENOIOCTLCMD)
r = vhost_vring_ioctl(&n->dev, ioctl, argp);
else
vhost_net_flush(n);
-out:
mutex_unlock(&n->dev.mutex);
return r;
}