replace zero-length arrays with flexible ones

[dpdk.git] / lib / vhost / vhost.h

diff --git a/lib/vhost/vhost.h b/lib/vhost/vhost.h
index a9edc27..14235aa 100644 (file)
--- a/lib/vhost/vhost.h
+++ b/lib/vhost/vhost.h
@@ -37,6 +37,8 @@
 #define VIRTIO_DEV_FEATURES_FAILED ((uint32_t)1 << 4)
 /* Used to indicate that the virtio_net tx code should fill TX ol_flags */
 #define VIRTIO_DEV_LEGACY_OL_FLAGS ((uint32_t)1 << 5)
+/*  Used to indicate the application has requested statistics collection */
+#define VIRTIO_DEV_STATS_ENABLED ((uint32_t)1 << 6)
 
 /* Backend value set by guest. */
 #define VIRTIO_DEV_STOPPED -1
@@ -121,6 +123,23 @@ struct vring_used_elem_packed {
        uint32_t count;
 };
 
+/**
+ * Virtqueue statistics
+ */
+struct virtqueue_stats {
+       uint64_t packets;
+       uint64_t bytes;
+       uint64_t multicast;
+       uint64_t broadcast;
+       /* Size bins in array as RFC 2819, undersized [0], 64 [1], etc */
+       uint64_t size_bins[8];
+       uint64_t guest_notifications;
+       uint64_t iotlb_hits;
+       uint64_t iotlb_misses;
+       uint64_t inflight_submitted;
+       uint64_t inflight_completed;
+};
+
 /**
  * iovec
  */
@@ -180,6 +199,7 @@ struct async_inflight_info {
        struct rte_mbuf *mbuf;
        uint16_t descs; /* num of descs inflight */
        uint16_t nr_buffers; /* num of buffers inflight for packed ring */
+       struct virtio_net_hdr nethdr;
 };
 
 struct vhost_async {
@@ -305,6 +325,7 @@ struct vhost_virtqueue {
 #define VIRTIO_UNINITIALIZED_NOTIF     (-1)
 
        struct vhost_vring_addr ring_addrs;
+       struct virtqueue_stats  stats;
 } __rte_cache_aligned;
 
 /* Virtio device status as per Virtio specification */
@@ -780,7 +801,7 @@ int alloc_vring_queue(struct virtio_net *dev, uint32_t vring_idx);
 void vhost_attach_vdpa_device(int vid, struct rte_vdpa_device *dev);
 
 void vhost_set_ifname(int, const char *if_name, unsigned int if_len);
-void vhost_setup_virtio_net(int vid, bool enable, bool legacy_ol_flags);
+void vhost_setup_virtio_net(int vid, bool enable, bool legacy_ol_flags, bool stats_enabled);
 void vhost_enable_extbuf(int vid);
 void vhost_enable_linearbuf(int vid);
 int vhost_enable_guest_notification(struct virtio_net *dev,
@@ -856,6 +877,8 @@ vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
                                        (vq->callfd >= 0)) ||
                                unlikely(!signalled_used_valid)) {
                        eventfd_write(vq->callfd, (eventfd_t) 1);
+                       if (dev->flags & VIRTIO_DEV_STATS_ENABLED)
+                               vq->stats.guest_notifications++;
                        if (dev->notify_ops->guest_notified)
                                dev->notify_ops->guest_notified(dev->vid);
                }
@@ -864,6 +887,8 @@ vhost_vring_call_split(struct virtio_net *dev, struct vhost_virtqueue *vq)
                if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT)
                                && (vq->callfd >= 0)) {
                        eventfd_write(vq->callfd, (eventfd_t)1);
+                       if (dev->flags & VIRTIO_DEV_STATS_ENABLED)
+                               vq->stats.guest_notifications++;
                        if (dev->notify_ops->guest_notified)
                                dev->notify_ops->guest_notified(dev->vid);
                }
@@ -957,5 +982,4 @@ mbuf_is_consumed(struct rte_mbuf *m)
 
        return true;
 }
-
 #endif /* _VHOST_NET_CDEV_H_ */