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authorXuan Zhuo <xuanzhuo@linux.alibaba.com>2022-08-01 09:38:21 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 11:06:38 +0300
commitda802961832f9852886304290135457519815497 (patch)
tree15d1e1ab7b0387b95bfc5931a98f3ff12e77f9fc /include
parent0b6fd46ec5f5720b76cbb01300ed9f7b7c6365c4 (diff)
downloadlinux-da802961832f9852886304290135457519815497.tar.xz
virtio: record the maximum queue num supported by the device.
virtio-net can display the maximum (supported by hardware) ring size in ethtool -g eth0. When the subsequent patch implements vring reset, it can judge whether the ring size passed by the driver is legal based on this. Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-2-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/virtio.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index d8fdf170637c..129bde7521e3 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -19,6 +19,7 @@
* @priv: a pointer for the virtqueue implementation to use.
* @index: the zero-based ordinal number for this queue.
* @num_free: number of elements we expect to be able to fit.
+ * @num_max: the maximum number of elements supported by the device.
*
* A note on @num_free: with indirect buffers, each buffer needs one
* element in the queue, otherwise a buffer will need one element per
@@ -31,6 +32,7 @@ struct virtqueue {
struct virtio_device *vdev;
unsigned int index;
unsigned int num_free;
+ unsigned int num_max;
void *priv;
};