Signed-off-by: Yuanhan Liu <yuanhan....@linux.intel.com>
---
v4: use parameter to store the returned features and return -1 on error
---
lib/librte_vhost/rte_vhost_version.map | 1 +
lib/librte_vhost/rte_virtio_net.h | 12 ++++++++++++
lib/librte_vhost/vhost.c | 13 +++++++++++++
3 files changed, 26 insertions(+)
diff --git a/lib/librte_vhost/rte_vhost_version.map
b/lib/librte_vhost/rte_vhost_version.map
index 664a5f3..cec1e9e 100644
--- a/lib/librte_vhost/rte_vhost_version.map
+++ b/lib/librte_vhost/rte_vhost_version.map
@@ -37,5 +37,6 @@ DPDK_17.05 {
rte_vhost_driver_set_features;
rte_vhost_get_mem_table;
rte_vhost_get_mtu;
+ rte_vhost_get_negotiated_features;
} DPDK_16.07;
diff --git a/lib/librte_vhost/rte_virtio_net.h
b/lib/librte_vhost/rte_virtio_net.h
index 8c1c172..c6fba0b 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -156,6 +156,18 @@ struct virtio_net_device_ops {
*/
int rte_vhost_driver_get_features(const char *path, uint64_t *features);
+/**
+ * Get the feature bits after negotiation
+ *
+ * @param vid
+ * Vhost device ID
+ * @param features
+ * A pointer to store the queried feature bits
+ * @return
+ * 0 on success, -1 on failure
+ */
+int rte_vhost_get_negotiated_features(int vid, uint64_t *features);
+
/* Register callbacks. */
int rte_vhost_driver_callback_register(const char *path,
struct virtio_net_device_ops const * const ops);
diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index 2b41652..90b0f67 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -360,6 +360,19 @@ struct virtio_net *
}
int
+rte_vhost_get_negotiated_features(int vid, uint64_t *features)
+{
+ struct virtio_net *dev;
+
+ dev = get_device(vid);
+ if (!dev)
+ return -1;
+
+ *features = dev->features;
+ return 0;
+}
+
+int
rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem)
{
struct virtio_net *dev;
--
1.9.0
