ofproto: Optimise OpenFlow flow expiry
[sliver-openvswitch.git] / ofproto / ofproto.c
index dabb590..bc27079 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
  * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -407,11 +407,11 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
                                         OFPROTO_FLOW_EVICTION_THRESHOLD_DEFAULT);
     ofproto->forward_bpdu = false;
     ofproto->fallback_dpid = pick_fallback_dpid();
-    ofproto->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
-    ofproto->hw_desc = xstrdup(DEFAULT_HW_DESC);
-    ofproto->sw_desc = xstrdup(DEFAULT_SW_DESC);
-    ofproto->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
-    ofproto->dp_desc = xstrdup(DEFAULT_DP_DESC);
+    ofproto->mfr_desc = NULL;
+    ofproto->hw_desc = NULL;
+    ofproto->sw_desc = NULL;
+    ofproto->serial_desc = NULL;
+    ofproto->dp_desc = NULL;
     ofproto->frag_handling = OFPC_FRAG_NORMAL;
     hmap_init(&ofproto->ports);
     shash_init(&ofproto->port_by_name);
@@ -419,6 +419,7 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
     ofproto->max_ports = OFPP_MAX;
     ofproto->tables = NULL;
     ofproto->n_tables = 0;
+    list_init(&ofproto->expirable);
     ofproto->connmgr = connmgr_create(ofproto, datapath_name, datapath_name);
     ofproto->state = S_OPENFLOW;
     list_init(&ofproto->pending);
@@ -446,12 +447,12 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
     bitmap_set1(ofproto->ofp_port_ids, 0);
 
     /* Check that hidden tables, if any, are at the end. */
-    assert(ofproto->n_tables);
+    ovs_assert(ofproto->n_tables);
     for (i = 0; i + 1 < ofproto->n_tables; i++) {
         enum oftable_flags flags = ofproto->tables[i].flags;
         enum oftable_flags next_flags = ofproto->tables[i + 1].flags;
 
-        assert(!(flags & OFTABLE_HIDDEN) || next_flags & OFTABLE_HIDDEN);
+        ovs_assert(!(flags & OFTABLE_HIDDEN) || next_flags & OFTABLE_HIDDEN);
     }
 
     ofproto->datapath_id = pick_datapath_id(ofproto);
@@ -469,8 +470,8 @@ ofproto_init_tables(struct ofproto *ofproto, int n_tables)
 {
     struct oftable *table;
 
-    assert(!ofproto->n_tables);
-    assert(n_tables >= 1 && n_tables <= 255);
+    ovs_assert(!ofproto->n_tables);
+    ovs_assert(n_tables >= 1 && n_tables <= 255);
 
     ofproto->n_tables = n_tables;
     ofproto->tables = xmalloc(n_tables * sizeof *ofproto->tables);
@@ -493,7 +494,7 @@ ofproto_init_tables(struct ofproto *ofproto, int n_tables)
 void
 ofproto_init_max_ports(struct ofproto *ofproto, uint16_t max_ports)
 {
-    assert(max_ports <= OFPP_MAX);
+    ovs_assert(max_ports <= OFPP_MAX);
     ofproto->max_ports = max_ports;
 }
 
@@ -585,63 +586,23 @@ ofproto_set_forward_bpdu(struct ofproto *ofproto, bool forward_bpdu)
 }
 
 /* Sets the MAC aging timeout for the OFPP_NORMAL action on 'ofproto' to
- * 'idle_time', in seconds. */
+ * 'idle_time', in seconds, and the maximum number of MAC table entries to
+ * 'max_entries'. */
 void
-ofproto_set_mac_idle_time(struct ofproto *ofproto, unsigned idle_time)
+ofproto_set_mac_table_config(struct ofproto *ofproto, unsigned idle_time,
+                             size_t max_entries)
 {
-    if (ofproto->ofproto_class->set_mac_idle_time) {
-        ofproto->ofproto_class->set_mac_idle_time(ofproto, idle_time);
+    if (ofproto->ofproto_class->set_mac_table_config) {
+        ofproto->ofproto_class->set_mac_table_config(ofproto, idle_time,
+                                                     max_entries);
     }
 }
 
 void
-ofproto_set_desc(struct ofproto *p,
-                 const char *mfr_desc, const char *hw_desc,
-                 const char *sw_desc, const char *serial_desc,
-                 const char *dp_desc)
+ofproto_set_dp_desc(struct ofproto *p, const char *dp_desc)
 {
-    struct ofp_desc_stats *ods;
-
-    if (mfr_desc) {
-        if (strlen(mfr_desc) >= sizeof ods->mfr_desc) {
-            VLOG_WARN("%s: truncating mfr_desc, must be less than %zu bytes",
-                      p->name, sizeof ods->mfr_desc);
-        }
-        free(p->mfr_desc);
-        p->mfr_desc = xstrdup(mfr_desc);
-    }
-    if (hw_desc) {
-        if (strlen(hw_desc) >= sizeof ods->hw_desc) {
-            VLOG_WARN("%s: truncating hw_desc, must be less than %zu bytes",
-                      p->name, sizeof ods->hw_desc);
-        }
-        free(p->hw_desc);
-        p->hw_desc = xstrdup(hw_desc);
-    }
-    if (sw_desc) {
-        if (strlen(sw_desc) >= sizeof ods->sw_desc) {
-            VLOG_WARN("%s: truncating sw_desc, must be less than %zu bytes",
-                      p->name, sizeof ods->sw_desc);
-        }
-        free(p->sw_desc);
-        p->sw_desc = xstrdup(sw_desc);
-    }
-    if (serial_desc) {
-        if (strlen(serial_desc) >= sizeof ods->serial_num) {
-            VLOG_WARN("%s: truncating serial_desc, must be less than %zu "
-                      "bytes", p->name, sizeof ods->serial_num);
-        }
-        free(p->serial_desc);
-        p->serial_desc = xstrdup(serial_desc);
-    }
-    if (dp_desc) {
-        if (strlen(dp_desc) >= sizeof ods->dp_desc) {
-            VLOG_WARN("%s: truncating dp_desc, must be less than %zu bytes",
-                      p->name, sizeof ods->dp_desc);
-        }
-        free(p->dp_desc);
-        p->dp_desc = xstrdup(dp_desc);
-    }
+    free(p->dp_desc);
+    p->dp_desc = dp_desc ? xstrdup(dp_desc) : NULL;
 }
 
 int
@@ -950,7 +911,7 @@ ofproto_configure_table(struct ofproto *ofproto, int table_id,
 {
     struct oftable *table;
 
-    assert(table_id >= 0 && table_id < ofproto->n_tables);
+    ovs_assert(table_id >= 0 && table_id < ofproto->n_tables);
     table = &ofproto->tables[table_id];
 
     oftable_set_name(table, s->name);
@@ -1032,8 +993,8 @@ ofproto_destroy__(struct ofproto *ofproto)
 {
     struct oftable *table;
 
-    assert(list_is_empty(&ofproto->pending));
-    assert(!ofproto->n_pending);
+    ovs_assert(list_is_empty(&ofproto->pending));
+    ovs_assert(!ofproto->n_pending);
 
     connmgr_destroy(ofproto->connmgr);
 
@@ -1653,38 +1614,30 @@ static uint16_t
 alloc_ofp_port(struct ofproto *ofproto, const char *netdev_name)
 {
     uint16_t ofp_port;
+    uint16_t end_port_no = ofproto->alloc_port_no;
 
     ofp_port = simap_get(&ofproto->ofp_requests, netdev_name);
     ofp_port = ofp_port ? ofp_port : OFPP_NONE;
 
     if (ofp_port >= ofproto->max_ports
             || bitmap_is_set(ofproto->ofp_port_ids, ofp_port)) {
-        bool retry = ofproto->alloc_port_no ? true : false;
-
         /* Search for a free OpenFlow port number.  We try not to
          * immediately reuse them to prevent problems due to old
          * flows. */
-        while (ofp_port >= ofproto->max_ports) {
-            for (ofproto->alloc_port_no++;
-                 ofproto->alloc_port_no < ofproto->max_ports;
-                 ofproto->alloc_port_no++) {
-                if (!bitmap_is_set(ofproto->ofp_port_ids,
-                                   ofproto->alloc_port_no)) {
-                    ofp_port = ofproto->alloc_port_no;
-                    break;
-                }
+        for (;;) {
+            if (++ofproto->alloc_port_no >= ofproto->max_ports) {
+                ofproto->alloc_port_no = 0;
             }
-            if (ofproto->alloc_port_no >= ofproto->max_ports) {
-                if (retry) {
-                    ofproto->alloc_port_no = 0;
-                    retry = false;
-                } else {
-                    return OFPP_NONE;
-                }
+            if (!bitmap_is_set(ofproto->ofp_port_ids,
+                               ofproto->alloc_port_no)) {
+                ofp_port = ofproto->alloc_port_no;
+                break;
+            }
+            if (ofproto->alloc_port_no == end_port_no) {
+                return OFPP_NONE;
             }
         }
     }
-
     bitmap_set1(ofproto->ofp_port_ids, ofp_port);
     return ofp_port;
 }
@@ -1692,7 +1645,9 @@ alloc_ofp_port(struct ofproto *ofproto, const char *netdev_name)
 static void
 dealloc_ofp_port(const struct ofproto *ofproto, uint16_t ofp_port)
 {
-    bitmap_set0(ofproto->ofp_port_ids, ofp_port);
+    if (ofp_port < ofproto->max_ports) {
+        bitmap_set0(ofproto->ofp_port_ids, ofp_port);
+    }
 }
 
 /* Opens and returns a netdev for 'ofproto_port' in 'ofproto', or a null
@@ -2015,11 +1970,12 @@ init_ports(struct ofproto *p)
     }
 
     SHASH_FOR_EACH_SAFE(node, next, &init_ofp_ports) {
-        const struct iface_hint *iface_hint = node->data;
+        struct iface_hint *iface_hint = node->data;
 
         if (!strcmp(iface_hint->br_name, p->name)) {
             free(iface_hint->br_name);
             free(iface_hint->br_type);
+            free(iface_hint);
             shash_delete(&init_ofp_ports, node);
         }
     }
@@ -2119,7 +2075,7 @@ ofproto_rule_destroy__(struct rule *rule)
 void
 ofproto_rule_destroy(struct rule *rule)
 {
-    assert(!rule->pending);
+    ovs_assert(!rule->pending);
     oftable_remove_rule(rule);
     ofproto_rule_destroy__(rule);
 }
@@ -2129,7 +2085,7 @@ ofproto_rule_destroy(struct rule *rule)
 bool
 ofproto_rule_has_out_port(const struct rule *rule, uint16_t port)
 {
-    return (port == OFPP_NONE
+    return (port == OFPP_ANY
             || ofpacts_output_to_port(rule->ofpacts, rule->ofpacts_len, port));
 }
 
@@ -2158,7 +2114,7 @@ ofoperation_has_out_port(const struct ofoperation *op, uint16_t out_port)
 
 /* Executes the actions indicated by 'rule' on 'packet' and credits 'rule''s
  * statistics appropriately.  'packet' must have at least sizeof(struct
- * ofp_packet_in) bytes of headroom.
+ * ofp10_packet_in) bytes of headroom.
  *
  * 'packet' doesn't necessarily have to match 'rule'.  'rule' will be credited
  * with statistics for 'packet' either way.
@@ -2169,7 +2125,7 @@ rule_execute(struct rule *rule, uint16_t in_port, struct ofpbuf *packet)
 {
     struct flow flow;
 
-    assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
+    ovs_assert(ofpbuf_headroom(packet) >= sizeof(struct ofp10_packet_in));
 
     flow_extract(packet, 0, 0, NULL, in_port, &flow);
     return rule->ofproto->ofproto_class->rule_execute(rule, &flow, packet);
@@ -2218,7 +2174,7 @@ handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
 
     ofproto->ofproto_class->get_features(ofproto, &arp_match_ip,
                                          &features.actions);
-    assert(features.actions & OFPUTIL_A_OUTPUT); /* sanity check */
+    ovs_assert(features.actions & OFPUTIL_A_OUTPUT); /* sanity check */
 
     /* Count only non-hidden tables in the number of tables.  (Hidden tables,
      * if present, are always at the end.) */
@@ -2238,7 +2194,8 @@ handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
     if (arp_match_ip) {
         features.capabilities |= OFPUTIL_C_ARP_MATCH_IP;
     }
-
+    /* FIXME: Fill in proper features.auxiliary_id for auxiliary connections */
+    features.auxiliary_id = 0;
     b = ofputil_encode_switch_features(&features, ofconn_get_protocol(ofconn),
                                        oh->xid);
     HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
@@ -2261,7 +2218,9 @@ handle_get_config_request(struct ofconn *ofconn, const struct ofp_header *oh)
     buf = ofpraw_alloc_reply(OFPRAW_OFPT_GET_CONFIG_REPLY, oh, 0);
     osc = ofpbuf_put_uninit(buf, sizeof *osc);
     flags = ofproto->frag_handling;
-    if (ofconn_get_invalid_ttl_to_controller(ofconn)) {
+    /* OFPC_INVALID_TTL_TO_CONTROLLER is deprecated in OF 1.3 */
+    if (oh->version < OFP13_VERSION
+        && ofconn_get_invalid_ttl_to_controller(ofconn)) {
         flags |= OFPC_INVALID_TTL_TO_CONTROLLER;
     }
     osc->flags = htons(flags);
@@ -2283,7 +2242,7 @@ handle_set_config(struct ofconn *ofconn, const struct ofp_header *oh)
         enum ofp_config_flags cur = ofproto->frag_handling;
         enum ofp_config_flags next = flags & OFPC_FRAG_MASK;
 
-        assert((cur & OFPC_FRAG_MASK) == cur);
+        ovs_assert((cur & OFPC_FRAG_MASK) == cur);
         if (cur != next) {
             if (ofproto->ofproto_class->set_frag_handling(ofproto, next)) {
                 ofproto->frag_handling = next;
@@ -2294,8 +2253,10 @@ handle_set_config(struct ofconn *ofconn, const struct ofp_header *oh)
             }
         }
     }
+    /* OFPC_INVALID_TTL_TO_CONTROLLER is deprecated in OF 1.3 */
     ofconn_set_invalid_ttl_to_controller(ofconn,
-             (flags & OFPC_INVALID_TTL_TO_CONTROLLER));
+             (oh->version < OFP13_VERSION
+              && flags & OFPC_INVALID_TTL_TO_CONTROLLER));
 
     ofconn_set_miss_send_len(ofconn, ntohs(osc->miss_send_len));
 
@@ -2434,17 +2395,29 @@ static enum ofperr
 handle_desc_stats_request(struct ofconn *ofconn,
                           const struct ofp_header *request)
 {
+    static const char *default_mfr_desc = "Nicira, Inc.";
+    static const char *default_hw_desc = "Open vSwitch";
+    static const char *default_sw_desc = VERSION;
+    static const char *default_serial_desc = "None";
+    static const char *default_dp_desc = "None";
+
     struct ofproto *p = ofconn_get_ofproto(ofconn);
     struct ofp_desc_stats *ods;
     struct ofpbuf *msg;
 
     msg = ofpraw_alloc_stats_reply(request, 0);
     ods = ofpbuf_put_zeros(msg, sizeof *ods);
-    ovs_strlcpy(ods->mfr_desc, p->mfr_desc, sizeof ods->mfr_desc);
-    ovs_strlcpy(ods->hw_desc, p->hw_desc, sizeof ods->hw_desc);
-    ovs_strlcpy(ods->sw_desc, p->sw_desc, sizeof ods->sw_desc);
-    ovs_strlcpy(ods->serial_num, p->serial_desc, sizeof ods->serial_num);
-    ovs_strlcpy(ods->dp_desc, p->dp_desc, sizeof ods->dp_desc);
+    ovs_strlcpy(ods->mfr_desc, p->mfr_desc ? p->mfr_desc : default_mfr_desc,
+                sizeof ods->mfr_desc);
+    ovs_strlcpy(ods->hw_desc, p->hw_desc ? p->hw_desc : default_hw_desc,
+                sizeof ods->hw_desc);
+    ovs_strlcpy(ods->sw_desc, p->sw_desc ? p->sw_desc : default_sw_desc,
+                sizeof ods->sw_desc);
+    ovs_strlcpy(ods->serial_num,
+                p->serial_desc ? p->serial_desc : default_serial_desc,
+                sizeof ods->serial_num);
+    ovs_strlcpy(ods->dp_desc, p->dp_desc ? p->dp_desc : default_dp_desc,
+                sizeof ods->dp_desc);
     ofconn_send_reply(ofconn, msg);
 
     return 0;
@@ -2542,7 +2515,7 @@ handle_port_stats_request(struct ofconn *ofconn,
     }
 
     ofpmp_init(&replies, request);
-    if (port_no != OFPP_NONE) {
+    if (port_no != OFPP_ANY) {
         port = ofproto_get_port(p, port_no);
         if (port) {
             append_port_stat(port, &replies);
@@ -2659,7 +2632,7 @@ next_matching_table(const struct ofproto *ofproto,
  * OpenFlow OFPFC_MODIFY and OFPFC_DELETE requests and puts them on list
  * 'rules'.
  *
- * If 'out_port' is anything other than OFPP_NONE, then only rules that output
+ * If 'out_port' is anything other than OFPP_ANY, then only rules that output
  * to 'out_port' are included.
  *
  * Hidden rules are always omitted.
@@ -2710,7 +2683,7 @@ exit:
  * OpenFlow OFPFC_MODIFY_STRICT and OFPFC_DELETE_STRICT requests and puts them
  * on list 'rules'.
  *
- * If 'out_port' is anything other than OFPP_NONE, then only rules that output
+ * If 'out_port' is anything other than OFPP_ANY, then only rules that output
  * to 'out_port' are included.
  *
  * Hidden rules are always omitted.
@@ -2808,6 +2781,12 @@ handle_flow_stats_request(struct ofconn *ofconn,
                                                &fs.byte_count);
         fs.ofpacts = rule->ofpacts;
         fs.ofpacts_len = rule->ofpacts_len;
+        fs.flags = 0;
+        if (rule->send_flow_removed) {
+            fs.flags |= OFPFF_SEND_FLOW_REM;
+            /* FIXME: Implement OF 1.3 flags OFPFF13_NO_PKT_COUNTS
+               and OFPFF13_NO_BYT_COUNTS */
+        }
         ofputil_append_flow_stats_reply(&fs, &replies);
     }
     ofconn_send_replies(ofconn, &replies);
@@ -2833,11 +2812,7 @@ flow_stats_ds(struct rule *rule, struct ds *results)
     ds_put_format(results, "n_bytes=%"PRIu64", ", byte_count);
     cls_rule_format(&rule->cr, results);
     ds_put_char(results, ',');
-    if (rule->ofpacts_len > 0) {
-        ofpacts_format(rule->ofpacts, rule->ofpacts_len, results);
-    } else {
-        ds_put_cstr(results, "drop");
-    }
+    ofpacts_format(rule->ofpacts, rule->ofpacts_len, results);
     ds_put_cstr(results, "\n");
 }
 
@@ -3054,7 +3029,7 @@ handle_queue_stats_request(struct ofconn *ofconn,
         return error;
     }
 
-    if (oqsr.port_no == OFPP_ALL) {
+    if (oqsr.port_no == OFPP_ANY) {
         error = OFPERR_OFPQOFC_BAD_QUEUE;
         HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
             if (!handle_queue_stats_for_port(port, oqsr.queue_id, &cbdata)) {
@@ -3135,7 +3110,7 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
             if (error) {
                 return error;
             }
-            assert(table_id < ofproto->n_tables);
+            ovs_assert(table_id < ofproto->n_tables);
             table = &ofproto->tables[table_id];
         } else {
             table = &ofproto->tables[0];
@@ -3174,6 +3149,8 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
         return OFPERR_OFPFMFC_OVERLAP;
     }
 
+    /* FIXME: Implement OFPFF12_RESET_COUNTS */
+
     rule->ofproto = ofproto;
     rule->pending = NULL;
     rule->flow_cookie = fm->new_cookie;
@@ -3182,10 +3159,13 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
     rule->hard_timeout = fm->hard_timeout;
     rule->table_id = table - ofproto->tables;
     rule->send_flow_removed = (fm->flags & OFPFF_SEND_FLOW_REM) != 0;
+    /* FIXME: Implement OF 1.3 flags OFPFF13_NO_PKT_COUNTS
+       and OFPFF13_NO_BYT_COUNTS */
     rule->ofpacts = xmemdup(fm->ofpacts, fm->ofpacts_len);
     rule->ofpacts_len = fm->ofpacts_len;
     rule->evictable = true;
     rule->eviction_group = NULL;
+    list_init(&rule->expirable);
     rule->monitor_flags = 0;
     rule->add_seqno = 0;
     rule->modify_seqno = 0;
@@ -3267,6 +3247,8 @@ modify_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
         bool actions_changed;
         ovs_be64 new_cookie;
 
+        /* FIXME: Implement OFPFF12_RESET_COUNTS */
+
         if (rule_is_modifiable(rule)) {
             /* At least one rule is modifiable, don't report EPERM error. */
             error = 0;
@@ -3327,7 +3309,7 @@ modify_flows_loose(struct ofproto *ofproto, struct ofconn *ofconn,
 
     error = collect_rules_loose(ofproto, fm->table_id, &fm->match,
                                 fm->cookie, fm->cookie_mask,
-                                OFPP_NONE, &rules);
+                                OFPP_ANY, &rules);
     if (error) {
         return error;
     } else if (list_is_empty(&rules)) {
@@ -3352,7 +3334,7 @@ modify_flow_strict(struct ofproto *ofproto, struct ofconn *ofconn,
 
     error = collect_rules_strict(ofproto, fm->table_id, &fm->match,
                                  fm->priority, fm->cookie, fm->cookie_mask,
-                                 OFPP_NONE, &rules);
+                                 OFPP_ANY, &rules);
 
     if (error) {
         return error;
@@ -3487,7 +3469,7 @@ ofproto_rule_expire(struct rule *rule, uint8_t reason)
     struct ofproto *ofproto = rule->ofproto;
     struct ofopgroup *group;
 
-    assert(reason == OFPRR_HARD_TIMEOUT || reason == OFPRR_IDLE_TIMEOUT);
+    ovs_assert(reason == OFPRR_HARD_TIMEOUT || reason == OFPRR_IDLE_TIMEOUT);
 
     ofproto_rule_send_removed(rule, reason);
 
@@ -3516,23 +3498,12 @@ handle_flow_mod(struct ofconn *ofconn, const struct ofp_header *oh)
     ofpbuf_use_stub(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
     error = ofputil_decode_flow_mod(&fm, oh, ofconn_get_protocol(ofconn),
                                     &ofpacts);
-    if (error) {
-        goto exit_free_ofpacts;
-    }
-
-    if (fm.flags & OFPFF10_EMERG) {
-        /* We do not support the OpenFlow 1.0 emergency flow cache, which
-         * is not required in OpenFlow 1.0.1 and removed from OpenFlow 1.1.
-         * There is no good error code, so just state that the flow table
-         * is full. */
-        error = OFPERR_OFPFMFC_TABLE_FULL;
-    }
     if (!error) {
         error = ofpacts_check(fm.ofpacts, fm.ofpacts_len,
                               &fm.match.flow, ofproto->max_ports);
     }
     if (!error) {
-        error = handle_flow_mod__(ofconn_get_ofproto(ofconn), ofconn, &fm, oh);
+        error = handle_flow_mod__(ofproto, ofconn, &fm, oh);
     }
     if (error) {
         goto exit_free_ofpacts;
@@ -3576,7 +3547,7 @@ handle_flow_mod__(struct ofproto *ofproto, struct ofconn *ofconn,
                   const struct ofp_header *oh)
 {
     if (ofproto->n_pending >= 50) {
-        assert(!list_is_empty(&ofproto->pending));
+        ovs_assert(!list_is_empty(&ofproto->pending));
         return OFPROTO_POSTPONE;
     }
 
@@ -3609,27 +3580,38 @@ handle_flow_mod__(struct ofproto *ofproto, struct ofconn *ofconn,
 static enum ofperr
 handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh)
 {
-    const struct nx_role_request *nrr = ofpmsg_body(oh);
-    struct nx_role_request *reply;
+    struct ofputil_role_request rr;
     struct ofpbuf *buf;
     uint32_t role;
+    enum ofperr error;
 
-    role = ntohl(nrr->role);
-    if (role != NX_ROLE_OTHER && role != NX_ROLE_MASTER
-        && role != NX_ROLE_SLAVE) {
-        return OFPERR_OFPRRFC_BAD_ROLE;
+    error = ofputil_decode_role_message(oh, &rr);
+    if (error) {
+        return error;
+    }
+
+    if (rr.request_current_role_only) {
+        role = ofconn_get_role(ofconn); /* NX_ROLE_* */
+        goto reply;
     }
 
+    role = rr.role;
+
     if (ofconn_get_role(ofconn) != role
         && ofconn_has_pending_opgroups(ofconn)) {
         return OFPROTO_POSTPONE;
     }
 
+    if (rr.have_generation_id) {
+        if (!ofconn_set_master_election_id(ofconn, rr.generation_id)) {
+            return OFPERR_OFPRRFC_STALE;
+        }
+    }
+
     ofconn_set_role(ofconn, role);
 
-    buf = ofpraw_alloc_reply(OFPRAW_NXT_ROLE_REPLY, oh, 0);
-    reply = ofpbuf_put_zeros(buf, sizeof *reply);
-    reply->role = htonl(role);
+reply:
+    buf = ofputil_encode_role_reply(oh, role);
     ofconn_send_reply(ofconn, buf);
 
     return 0;
@@ -3884,7 +3866,7 @@ ofproto_collect_ofmonitor_refresh_rules(const struct ofmonitor *m,
 
         cls_cursor_init(&cursor, &table->cls, &target);
         CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
-            assert(!rule->pending); /* XXX */
+            ovs_assert(!rule->pending); /* XXX */
             ofproto_collect_ofmonitor_refresh_rule(m, rule, seqno, rules);
         }
     }
@@ -4040,14 +4022,14 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_BARRIER_REQUEST:
         return handle_barrier_request(ofconn, oh);
 
+    case OFPTYPE_ROLE_REQUEST:
+        return handle_role_request(ofconn, oh);
+
         /* OpenFlow replies. */
     case OFPTYPE_ECHO_REPLY:
         return 0;
 
         /* Nicira extension requests. */
-    case OFPTYPE_ROLE_REQUEST:
-        return handle_role_request(ofconn, oh);
-
     case OFPTYPE_FLOW_MOD_TABLE_ID:
         return handle_nxt_flow_mod_table_id(ofconn, oh);
 
@@ -4095,6 +4077,19 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_FLOW_MONITOR_STATS_REQUEST:
         return handle_flow_monitor_request(ofconn, oh);
 
+        /* FIXME: Change the following once they are implemented: */
+    case OFPTYPE_QUEUE_GET_CONFIG_REQUEST:
+    case OFPTYPE_GET_ASYNC_REQUEST:
+    case OFPTYPE_METER_MOD:
+    case OFPTYPE_GROUP_REQUEST:
+    case OFPTYPE_GROUP_DESC_REQUEST:
+    case OFPTYPE_GROUP_FEATURES_REQUEST:
+    case OFPTYPE_METER_REQUEST:
+    case OFPTYPE_METER_CONFIG_REQUEST:
+    case OFPTYPE_METER_FEATURES_REQUEST:
+    case OFPTYPE_TABLE_FEATURES_REQUEST:
+        return OFPERR_OFPBRC_BAD_TYPE;
+
     case OFPTYPE_HELLO:
     case OFPTYPE_ERROR:
     case OFPTYPE_FEATURES_REPLY:
@@ -4103,6 +4098,7 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_FLOW_REMOVED:
     case OFPTYPE_PORT_STATUS:
     case OFPTYPE_BARRIER_REPLY:
+    case OFPTYPE_QUEUE_GET_CONFIG_REPLY:
     case OFPTYPE_DESC_STATS_REPLY:
     case OFPTYPE_FLOW_STATS_REPLY:
     case OFPTYPE_QUEUE_STATS_REPLY:
@@ -4114,6 +4110,14 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_FLOW_MONITOR_PAUSED:
     case OFPTYPE_FLOW_MONITOR_RESUMED:
     case OFPTYPE_FLOW_MONITOR_STATS_REPLY:
+    case OFPTYPE_GET_ASYNC_REPLY:
+    case OFPTYPE_GROUP_REPLY:
+    case OFPTYPE_GROUP_DESC_REPLY:
+    case OFPTYPE_GROUP_FEATURES_REPLY:
+    case OFPTYPE_METER_REPLY:
+    case OFPTYPE_METER_CONFIG_REPLY:
+    case OFPTYPE_METER_FEATURES_REPLY:
+    case OFPTYPE_TABLE_FEATURES_REPLY:
     default:
         return OFPERR_OFPBRC_BAD_TYPE;
     }
@@ -4168,7 +4172,7 @@ ofopgroup_create(struct ofproto *ofproto, struct ofconn *ofconn,
     if (ofconn) {
         size_t request_len = ntohs(request->length);
 
-        assert(ofconn_get_ofproto(ofconn) == ofproto);
+        ovs_assert(ofconn_get_ofproto(ofconn) == ofproto);
 
         ofconn_add_opgroup(ofconn, &group->ofconn_node);
         group->ofconn = ofconn;
@@ -4206,7 +4210,7 @@ ofopgroup_complete(struct ofopgroup *group)
     struct ofoperation *op, *next_op;
     int error;
 
-    assert(!group->n_running);
+    ovs_assert(!group->n_running);
 
     error = 0;
     LIST_FOR_EACH (op, group_node, &group->ops) {
@@ -4225,7 +4229,7 @@ ofopgroup_complete(struct ofopgroup *group)
                 error = ofconn_pktbuf_retrieve(group->ofconn, group->buffer_id,
                                                &packet, &in_port);
                 if (packet) {
-                    assert(!error);
+                    ovs_assert(!error);
                     error = rule_execute(op->rule, in_port, packet);
                 }
                 break;
@@ -4285,7 +4289,7 @@ ofopgroup_complete(struct ofopgroup *group)
             break;
 
         case OFOPERATION_DELETE:
-            assert(!op->error);
+            ovs_assert(!op->error);
             ofproto_rule_destroy__(rule);
             op->rule = NULL;
             break;
@@ -4315,7 +4319,7 @@ ofopgroup_complete(struct ofopgroup *group)
     ofmonitor_flush(ofproto->connmgr);
 
     if (!list_is_empty(&group->ofproto_node)) {
-        assert(ofproto->n_pending > 0);
+        ovs_assert(ofproto->n_pending > 0);
         ofproto->n_pending--;
         list_remove(&group->ofproto_node);
     }
@@ -4346,7 +4350,7 @@ ofoperation_create(struct ofopgroup *group, struct rule *rule,
     struct ofproto *ofproto = group->ofproto;
     struct ofoperation *op;
 
-    assert(!rule->pending);
+    ovs_assert(!rule->pending);
 
     op = rule->pending = xzalloc(sizeof *op);
     op->group = group;
@@ -4416,9 +4420,9 @@ ofoperation_complete(struct ofoperation *op, enum ofperr error)
 {
     struct ofopgroup *group = op->group;
 
-    assert(op->rule->pending == op);
-    assert(group->n_running > 0);
-    assert(!error || op->type != OFOPERATION_DELETE);
+    ovs_assert(op->rule->pending == op);
+    ovs_assert(group->n_running > 0);
+    ovs_assert(!error || op->type != OFOPERATION_DELETE);
 
     op->error = error;
     if (!--group->n_running && !list_is_empty(&group->ofproto_node)) {
@@ -4429,7 +4433,7 @@ ofoperation_complete(struct ofoperation *op, enum ofperr error)
 struct rule *
 ofoperation_get_victim(struct ofoperation *op)
 {
-    assert(op->type == OFOPERATION_ADD);
+    ovs_assert(op->type == OFOPERATION_ADD);
     return op->victim;
 }
 \f
@@ -4729,7 +4733,7 @@ oftable_init(struct oftable *table)
 static void
 oftable_destroy(struct oftable *table)
 {
-    assert(classifier_is_empty(&table->cls));
+    ovs_assert(classifier_is_empty(&table->cls));
     oftable_disable_eviction(table);
     classifier_destroy(&table->cls);
     free(table->name);
@@ -4824,6 +4828,9 @@ oftable_remove_rule(struct rule *rule)
 
     classifier_remove(&table->cls, &rule->cr);
     eviction_group_remove_rule(rule);
+    if (!list_is_empty(&rule->expirable)) {
+        list_remove(&rule->expirable);
+    }
 }
 
 /* Inserts 'rule' into its oftable.  Removes any existing rule from 'rule''s
@@ -4835,6 +4842,11 @@ oftable_replace_rule(struct rule *rule)
     struct ofproto *ofproto = rule->ofproto;
     struct oftable *table = &ofproto->tables[rule->table_id];
     struct rule *victim;
+    bool may_expire = rule->hard_timeout || rule->idle_timeout;
+
+    if (may_expire) {
+        list_insert(&ofproto->expirable, &rule->expirable);
+    }
 
     victim = rule_from_cls_rule(classifier_replace(&table->cls, &rule->cr));
     if (victim) {
@@ -4956,7 +4968,7 @@ ofproto_port_set_realdev(struct ofproto *ofproto, uint16_t vlandev_ofp_port,
     struct ofport *ofport;
     int error;
 
-    assert(vlandev_ofp_port != realdev_ofp_port);
+    ovs_assert(vlandev_ofp_port != realdev_ofp_port);
 
     ofport = ofproto_get_port(ofproto, vlandev_ofp_port);
     if (!ofport) {