[dpdk-dev] [PATCH v2 06/22] vhost: introduce API to fetch negotiated features

Yuanhan Liu yuanhan.liu at linux.intel.com
Thu Mar 23 08:10:43 CET 2017


Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
 lib/librte_vhost/rte_vhost_version.map |  2 ++
 lib/librte_vhost/rte_virtio_net.h      | 10 ++++++++++
 lib/librte_vhost/vhost.c               | 12 ++++++++++++
 3 files changed, 24 insertions(+)

diff --git a/lib/librte_vhost/rte_vhost_version.map b/lib/librte_vhost/rte_vhost_version.map
index 664a5f3..e21b788 100644
--- a/lib/librte_vhost/rte_vhost_version.map
+++ b/lib/librte_vhost/rte_vhost_version.map
@@ -37,5 +37,7 @@ DPDK_17.05 {
 	rte_vhost_driver_set_features;
 	rte_vhost_get_mem_table;
 	rte_vhost_get_mtu;
+	rte_vhost_get_negotiated_features
+	rte_vhost_get_vhost_memory;
 
 } DPDK_16.07;
diff --git a/lib/librte_vhost/rte_virtio_net.h b/lib/librte_vhost/rte_virtio_net.h
index 5a91f97..57e57e3 100644
--- a/lib/librte_vhost/rte_virtio_net.h
+++ b/lib/librte_vhost/rte_virtio_net.h
@@ -154,6 +154,16 @@ struct virtio_net_device_ops {
  */
 uint64_t rte_vhost_driver_get_features(const char *path);
 
+/**
+ * Get the feature bits after negotiation
+ *
+ * @param vid
+ *  Vhost device ID
+ * @return
+ *  Negotiated feature bits on success, 0 on failure
+ */
+uint64_t rte_vhost_get_negotiated_features(int vid);
+
 /* 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..08dccfb 100644
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -359,6 +359,18 @@ struct virtio_net *
 	return 0;
 }
 
+uint64_t
+rte_vhost_get_negotiated_features(int vid)
+{
+	struct virtio_net *dev;
+
+	dev = get_device(vid);
+	if (!dev)
+		return 0;
+
+	return dev->features;
+}
+
 int
 rte_vhost_get_mem_table(int vid, struct rte_vhost_memory **mem)
 {
-- 
1.9.0



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