bridge: Rate-limit updates to "instant stats".
[sliver-openvswitch.git] / vswitchd / bridge.c
index fdd7c64..6dc3db2 100644 (file)
@@ -318,7 +318,7 @@ void
 bridge_init(const char *remote)
 {
     /* Create connection to database. */
-    idl = ovsdb_idl_create(remote, &ovsrec_idl_class, true);
+    idl = ovsdb_idl_create(remote, &ovsrec_idl_class, true, true);
     idl_seqno = ovsdb_idl_get_seqno(idl);
     ovsdb_idl_set_lock(idl, "ovs_vswitchd");
     ovsdb_idl_verify_write_only(idl);
@@ -345,6 +345,7 @@ bridge_init(const char *remote)
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_speed);
     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_mtu);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ofport);
     ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_statistics);
@@ -1698,6 +1699,7 @@ iface_refresh_status(struct iface *iface)
     int64_t bps;
     int mtu;
     int64_t mtu_64;
+    uint8_t mac[ETH_ADDR_LEN];
     int error;
 
     if (iface_is_synthetic(iface)) {
@@ -1721,8 +1723,7 @@ iface_refresh_status(struct iface *iface)
                                     netdev_features_is_full_duplex(current)
                                     ? "full" : "half");
         ovsrec_interface_set_link_speed(iface->cfg, &bps, 1);
-    }
-    else {
+    } else {
         ovsrec_interface_set_duplex(iface->cfg, NULL);
         ovsrec_interface_set_link_speed(iface->cfg, NULL, 0);
     }
@@ -1731,10 +1732,19 @@ iface_refresh_status(struct iface *iface)
     if (!error) {
         mtu_64 = mtu;
         ovsrec_interface_set_mtu(iface->cfg, &mtu_64, 1);
-    }
-    else {
+    } else {
         ovsrec_interface_set_mtu(iface->cfg, NULL, 0);
     }
+
+    error = netdev_get_etheraddr(iface->netdev, mac);
+    if (!error) {
+        char mac_string[32];
+
+        sprintf(mac_string, ETH_ADDR_FMT, ETH_ADDR_ARGS(mac));
+        ovsrec_interface_set_mac_in_use(iface->cfg, mac_string);
+    } else {
+        ovsrec_interface_set_mac_in_use(iface->cfg, NULL);
+    }
 }
 
 /* Writes 'iface''s CFM statistics to the database. 'iface' must not be
@@ -1743,57 +1753,47 @@ static void
 iface_refresh_cfm_stats(struct iface *iface)
 {
     const struct ovsrec_interface *cfg = iface->cfg;
-    int fault, opup, error;
-    const uint64_t *rmps;
-    size_t n_rmps;
-    int health;
-
-    fault = ofproto_port_get_cfm_fault(iface->port->bridge->ofproto,
-                                       iface->ofp_port);
-    if (fault >= 0) {
+    struct ofproto_cfm_status status;
+
+    if (!ofproto_port_get_cfm_status(iface->port->bridge->ofproto,
+                                    iface->ofp_port, &status)) {
+        ovsrec_interface_set_cfm_fault(cfg, NULL, 0);
+        ovsrec_interface_set_cfm_fault_status(cfg, NULL, 0);
+        ovsrec_interface_set_cfm_remote_opstate(cfg, NULL);
+        ovsrec_interface_set_cfm_health(cfg, NULL, 0);
+        ovsrec_interface_set_cfm_remote_mpids(cfg, NULL, 0);
+    } else {
         const char *reasons[CFM_FAULT_N_REASONS];
-        bool fault_bool = fault;
+        int64_t cfm_health = status.health;
+        bool faulted = status.faults != 0;
         size_t i, j;
 
+        ovsrec_interface_set_cfm_fault(cfg, &faulted, 1);
+
         j = 0;
         for (i = 0; i < CFM_FAULT_N_REASONS; i++) {
             int reason = 1 << i;
-            if (fault & reason) {
+            if (status.faults & reason) {
                 reasons[j++] = cfm_fault_reason_to_str(reason);
             }
         }
-
-        ovsrec_interface_set_cfm_fault(cfg, &fault_bool, 1);
         ovsrec_interface_set_cfm_fault_status(cfg, (char **) reasons, j);
-    } else {
-        ovsrec_interface_set_cfm_fault(cfg, NULL, 0);
-        ovsrec_interface_set_cfm_fault_status(cfg, NULL, 0);
-    }
 
-    opup = ofproto_port_get_cfm_opup(iface->port->bridge->ofproto,
-                                     iface->ofp_port);
-    if (opup >= 0) {
-        ovsrec_interface_set_cfm_remote_opstate(cfg, opup ? "up" : "down");
-    } else {
-        ovsrec_interface_set_cfm_remote_opstate(cfg, NULL);
-    }
-
-    error = ofproto_port_get_cfm_remote_mpids(iface->port->bridge->ofproto,
-                                              iface->ofp_port, &rmps, &n_rmps);
-    if (error >= 0) {
-        ovsrec_interface_set_cfm_remote_mpids(cfg, (const int64_t *)rmps,
-                                              n_rmps);
-    } else {
-        ovsrec_interface_set_cfm_remote_mpids(cfg, NULL, 0);
-    }
+        if (status.remote_opstate >= 0) {
+            const char *remote_opstate = status.remote_opstate ? "up" : "down";
+            ovsrec_interface_set_cfm_remote_opstate(cfg, remote_opstate);
+        } else {
+            ovsrec_interface_set_cfm_remote_opstate(cfg, NULL);
+        }
 
-    health = ofproto_port_get_cfm_health(iface->port->bridge->ofproto,
-                                        iface->ofp_port);
-    if (health >= 0) {
-        int64_t cfm_health = health;
-        ovsrec_interface_set_cfm_health(cfg, &cfm_health, 1);
-    } else {
-        ovsrec_interface_set_cfm_health(cfg, NULL, 0);
+        ovsrec_interface_set_cfm_remote_mpids(cfg,
+                                              (const int64_t *)status.rmps,
+                                              status.n_rmps);
+        if (cfm_health >= 0) {
+            ovsrec_interface_set_cfm_health(cfg, &cfm_health, 1);
+        } else {
+            ovsrec_interface_set_cfm_health(cfg, NULL, 0);
+        }
     }
 }
 
@@ -1961,15 +1961,16 @@ run_system_stats(void)
 }
 
 static inline const char *
-nx_role_to_str(enum nx_role role)
+ofp12_controller_role_to_str(enum ofp12_controller_role role)
 {
     switch (role) {
-    case NX_ROLE_OTHER:
+    case OFPCR12_ROLE_EQUAL:
         return "other";
-    case NX_ROLE_MASTER:
+    case OFPCR12_ROLE_MASTER:
         return "master";
-    case NX_ROLE_SLAVE:
+    case OFPCR12_ROLE_SLAVE:
         return "slave";
+    case OFPCR12_ROLE_NOCHANGE:
     default:
         return "*** INVALID ROLE ***";
     }
@@ -2005,7 +2006,8 @@ refresh_controller_status(void)
             }
 
             ovsrec_controller_set_is_connected(cfg, cinfo->is_connected);
-            ovsrec_controller_set_role(cfg, nx_role_to_str(cinfo->role));
+            ovsrec_controller_set_role(cfg, ofp12_controller_role_to_str(
+                                           cinfo->role));
             ovsrec_controller_set_status(cfg, &smap);
             smap_destroy(&smap);
         } else {
@@ -2017,17 +2019,61 @@ refresh_controller_status(void)
 
     ofproto_free_ofproto_controller_info(&info);
 }
+\f
+/* "Instant" stats.
+ *
+ * Some information in the database must be kept as up-to-date as possible to
+ * allow controllers to respond rapidly to network outages.  We call these
+ * statistics "instant" stats.
+ *
+ * We wish to update these statistics every INSTANT_INTERVAL_MSEC milliseconds,
+ * assuming that they've changed.  The only means we have to determine whether
+ * they have changed are:
+ *
+ *   - Try to commit changes to the database.  If nothing changed, then
+ *     ovsdb_idl_txn_commit() returns TXN_UNCHANGED, otherwise some other
+ *     value.
+ *
+ *   - instant_stats_run() is called late in the run loop, after anything that
+ *     might change any of the instant stats.
+ *
+ * We use these two facts together to avoid waking the process up every
+ * INSTANT_INTERVAL_MSEC whether there is any change or not.
+ */
+
+/* Minimum interval between writing updates to the instant stats to the
+ * database. */
+#define INSTANT_INTERVAL_MSEC 100
+
+/* Current instant stats database transaction, NULL if there is no ongoing
+ * transaction. */
+static struct ovsdb_idl_txn *instant_txn;
+
+/* Next time (in msec on monotonic clock) at which we will update the instant
+ * stats.  */
+static long long int instant_next_txn = LLONG_MIN;
+
+/* True if the run loop has run since we last saw that the instant stats were
+ * unchanged, that is, this is true if we need to wake up at 'instant_next_txn'
+ * to refresh the instant stats. */
+static bool instant_stats_could_have_changed;
 
 static void
-refresh_instant_stats(void)
+instant_stats_run(void)
 {
-    static struct ovsdb_idl_txn *txn = NULL;
+    enum ovsdb_idl_txn_status status;
+
+    instant_stats_could_have_changed = true;
 
-    if (!txn) {
+    if (!instant_txn) {
         struct bridge *br;
 
-        txn = ovsdb_idl_txn_create(idl);
+        if (time_msec() < instant_next_txn) {
+            return;
+        }
+        instant_next_txn = time_msec() + INSTANT_INTERVAL_MSEC;
 
+        instant_txn = ovsdb_idl_txn_create(idl);
         HMAP_FOR_EACH (br, node, &all_bridges) {
             struct iface *iface;
             struct port *port;
@@ -2076,12 +2122,26 @@ refresh_instant_stats(void)
         }
     }
 
-    if (ovsdb_idl_txn_commit(txn) != TXN_INCOMPLETE) {
-        ovsdb_idl_txn_destroy(txn);
-        txn = NULL;
+    status = ovsdb_idl_txn_commit(instant_txn);
+    if (status != TXN_INCOMPLETE) {
+        ovsdb_idl_txn_destroy(instant_txn);
+        instant_txn = NULL;
+    }
+    if (status == TXN_UNCHANGED) {
+        instant_stats_could_have_changed = false;
     }
 }
 
+static void
+instant_stats_wait(void)
+{
+    if (instant_txn) {
+        ovsdb_idl_txn_wait(instant_txn);
+    } else if (instant_stats_could_have_changed) {
+        poll_timer_wait_until(instant_next_txn);
+    }
+}
+\f
 /* Performs periodic activity required by bridges that needs to be done with
  * the least possible latency.
  *
@@ -2252,7 +2312,7 @@ bridge_run(void)
     }
 
     run_system_stats();
-    refresh_instant_stats();
+    instant_stats_run();
 }
 
 void
@@ -2284,6 +2344,7 @@ bridge_wait(void)
     }
 
     system_stats_wait();
+    instant_stats_wait();
 }
 
 /* Adds some memory usage statistics for bridges into 'usage', for use with
@@ -3340,6 +3401,7 @@ iface_clear_db_record(const struct ovsrec_interface *if_cfg)
         ovsrec_interface_set_duplex(if_cfg, NULL);
         ovsrec_interface_set_link_speed(if_cfg, NULL, 0);
         ovsrec_interface_set_link_state(if_cfg, NULL);
+        ovsrec_interface_set_mac_in_use(if_cfg, NULL);
         ovsrec_interface_set_mtu(if_cfg, NULL, 0);
         ovsrec_interface_set_cfm_fault(if_cfg, NULL, 0);
         ovsrec_interface_set_cfm_fault_status(if_cfg, NULL, 0);