bridge: Add ifindex column to Interface table.

This commit adds an "ifindex" column to the "Interface" table in the db.

Signed-off-by: Neil McKee <neil.mckee@inmon.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

NEWS

@@ -4,6 +4,8 @@ post-v1.11.0
       * New support for matching outer source and destination IP address
         of tunneled packets, for tunnel ports configured with the newly
 	added "remote_ip=flow" and "local_ip=flow" options.
+    - The Interface table in the database has a new "ifindex" column to
+      report the interface's OS-assigned ifindex.
     - New "check-oftest" Makefile target for running OFTest against Open
       vSwitch.  See README-OFTest for details.
     - The flow eviction threshold has been moved to the Open_vSwitch table.

vswitchd/bridge.c

@@ -367,6 +367,7 @@ bridge_init(const char *remote)
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_state);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_resets);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_mac_in_use);
+    ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ifindex);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_mtu);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ofport);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_statistics);
@@ -1810,6 +1811,7 @@ iface_refresh_status(struct iface *iface)
     int mtu;
     int64_t mtu_64;
     uint8_t mac[ETH_ADDR_LEN];
+    int64_t ifindex64;
     int error;
 
     if (iface_is_synthetic(iface)) {
@@ -1855,6 +1857,14 @@ iface_refresh_status(struct iface *iface)
     } else {
         ovsrec_interface_set_mac_in_use(iface->cfg, NULL);
     }
+
+    /* The netdev may return a negative number (such as -EOPNOTSUPP)
+     * if there is no valid ifindex number. */
+    ifindex64 = netdev_get_ifindex(iface->netdev);
+    if (ifindex64 < 0) {
+        ifindex64 = 0;
+    }
+    ovsrec_interface_set_ifindex(iface->cfg, &ifindex64, 1);
 }
 
 /* Writes 'iface''s CFM statistics to the database. 'iface' must not be
@@ -3573,6 +3583,7 @@ iface_clear_db_record(const struct ovsrec_interface *if_cfg)
         ovsrec_interface_set_cfm_remote_mpids(if_cfg, NULL, 0);
         ovsrec_interface_set_lacp_current(if_cfg, NULL, 0);
         ovsrec_interface_set_statistics(if_cfg, NULL, NULL, 0);
+        ovsrec_interface_set_ifindex(if_cfg, NULL, 0);
     }
 }
 

vswitchd/vswitch.ovsschema

@@ -1,6 +1,6 @@
 {"name": "Open_vSwitch",
- "version": "7.2.0",
- "cksum": "543912409 19436",
+ "version": "7.2.1",
+ "cksum": "707387125 19667",
  "tables": {
    "Open_vSwitch": {
      "columns": {
@@ -185,6 +185,14 @@
        "mac": {
          "type": {"key": {"type": "string"},
                   "min": 0, "max": 1}},
+       "ifindex": {
+         "type": {
+           "key": {"type": "integer",
+                   "minInteger": 0,
+                   "maxInteger": 4294967295},
+           "min": 0,
+           "max": 1},
+         "ephemeral": true},
        "external_ids": {
          "type": {"key": "string", "value": "string", "min": 0, "max": "unlimited"}},
        "ofport": {

vswitchd/vswitch.xml

@@ -1208,6 +1208,12 @@
         on a host.
       </column>
 
+      <column name="ifindex">
+        A positive interface index as defined for SNMP MIB-II in RFCs 1213 and
+        2863, if the interface has one, otherwise 0.  The ifindex is useful for
+        seamless integration with protocols such as SNMP and sFlow.
+      </column>
+
       <column name="mac_in_use">
         The MAC address in use by this interface.
       </column>