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virtnet_validate_vqs
2023 Apr 16
4
[PATCH net] virtio-net: reject small vring sizes
...1 file changed, 24 insertions(+)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 2396c28c012..59676252c5c 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -3745,6 +3745,26 @@ static int init_vqs(struct virtnet_info *vi)
return ret;
}
+static int virtnet_validate_vqs(struct virtnet_info *vi)
+{
+ u32 i, min_size = roundup_pow_of_two(MAX_SKB_FRAGS + 2);
+
+ /* Transmit/Receive vring size must be at least MAX_SKB_FRAGS + 2
+ * (fragments + linear part + virtio header)
+ */
+ for (i = 0; i < vi->max_queue_pairs; i++) {
+ if (virtqueue_get_vring_size(vi-&...