netdev: Custom statistics.

- New get_custom_stats interface function is added to netdev. It
  allows particular netdev implementation to expose custom
  counters in dictionary format (counter name/counter value).
- New statistics are retrieved using experimenter code and
  are printed as a result to ofctl dump-ports.
- New counters are available for OpenFlow 1.4+.
- New statistics are printed to output via ofctl only if those
  are present in reply message.
- New statistics definition is added to include/openflow/intel-ext.h.
- Custom statistics are implemented only for dpdk-physical
  port type.
- DPDK-physical implementation uses xstats to collect statistics.
  Only dropped and error counters are exposed.

Co-authored-by: Ben Pfaff <blp@ovn.org>
Signed-off-by: Ben Pfaff <blp@ovn.org>
Signed-off-by: Michal Weglicki <michalx.weglicki@intel.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/include/openvswitch/netdev.h b/include/openvswitch/netdev.h
index 50bafc3a6..e25c241f4 100644
--- a/include/openvswitch/netdev.h
+++ b/include/openvswitch/netdev.h
@@ -27,6 +27,9 @@ extern "C" {
 
 struct netdev;
 
+/* Maximum name length for custom statistics counters */
+#define NETDEV_CUSTOM_STATS_NAME_SIZE 64
+
 /* Network device statistics.
  *
  * Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */
@@ -85,6 +88,18 @@ struct netdev_stats {
     uint64_t rx_jabber_errors;
 };
 
+/* Structure representation of custom statistics counter */
+struct netdev_custom_counter {
+    uint64_t value;
+    char name[NETDEV_CUSTOM_STATS_NAME_SIZE];
+};
+
+/* Structure representation of custom statistics */
+struct netdev_custom_stats {
+    uint16_t size;
+    struct netdev_custom_counter *counters;
+};
+
 /* Features. */
 enum netdev_features {
     NETDEV_F_10MB_HD =    1 << 0,  /* 10 Mb half-duplex rate support. */
@@ -115,6 +130,8 @@ uint64_t netdev_features_to_bps(enum netdev_features features,
 bool netdev_features_is_full_duplex(enum netdev_features features);
 int netdev_set_advertisements(struct netdev *, enum netdev_features advertise);
 
+void netdev_free_custom_stats_counters(struct netdev_custom_stats *);
+
 #ifdef __cplusplus
 }
 #endif