ofproto: Inline actions in struct rule_actions.
[sliver-openvswitch.git] / ofproto / ofproto.c
index 1d340c9..6195b75 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
+ * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
  * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -25,6 +25,7 @@
 #include "bitmap.h"
 #include "byte-order.h"
 #include "classifier.h"
+#include "connectivity.h"
 #include "connmgr.h"
 #include "coverage.h"
 #include "dynamic-string.h"
 #include "ofproto-provider.h"
 #include "openflow/nicira-ext.h"
 #include "openflow/openflow.h"
+#include "ovs-rcu.h"
 #include "packets.h"
 #include "pinsched.h"
 #include "pktbuf.h"
 #include "poll-loop.h"
 #include "random.h"
+#include "seq.h"
 #include "shash.h"
 #include "simap.h"
+#include "smap.h"
 #include "sset.h"
 #include "timeval.h"
 #include "unaligned.h"
@@ -121,7 +125,7 @@ struct ofoperation {
 
     /* OFOPERATION_MODIFY, OFOPERATION_REPLACE: The old actions, if the actions
      * are changing. */
-    struct rule_actions *actions;
+    const struct rule_actions *actions;
 
     /* OFOPERATION_DELETE. */
     enum ofp_flow_removed_reason reason; /* Reason flow was removed. */
@@ -179,7 +183,7 @@ struct eviction_group {
 
 static bool choose_rule_to_evict(struct oftable *table, struct rule **rulep);
 static void ofproto_evict(struct ofproto *) OVS_EXCLUDED(ofproto_mutex);
-static uint32_t rule_eviction_priority(struct rule *);
+static uint32_t rule_eviction_priority(struct ofproto *ofproto, struct rule *);
 static void eviction_group_add_rule(struct rule *);
 static void eviction_group_remove_rule(struct rule *);
 
@@ -255,14 +259,17 @@ struct ofport_usage {
 };
 
 /* rule. */
-static void ofproto_rule_destroy__(struct rule *);
 static void ofproto_rule_send_removed(struct rule *, uint8_t reason);
-static bool rule_is_modifiable(const struct rule *);
+static bool rule_is_modifiable(const struct rule *rule,
+                               enum ofputil_flow_mod_flags flag);
 
 /* OpenFlow. */
 static enum ofperr add_flow(struct ofproto *, struct ofconn *,
                             struct ofputil_flow_mod *,
                             const struct ofp_header *);
+static void do_add_flow(struct ofproto *, struct ofconn *,
+                        const struct ofp_header *request, uint32_t buffer_id,
+                        struct rule *);
 static enum ofperr modify_flows__(struct ofproto *, struct ofconn *,
                                   struct ofputil_flow_mod *,
                                   const struct ofp_header *,
@@ -270,6 +277,12 @@ static enum ofperr modify_flows__(struct ofproto *, struct ofconn *,
 static void delete_flow__(struct rule *rule, struct ofopgroup *,
                           enum ofp_flow_removed_reason)
     OVS_REQUIRES(ofproto_mutex);
+static bool ofproto_group_exists__(const struct ofproto *ofproto,
+                                   uint32_t group_id)
+    OVS_REQ_RDLOCK(ofproto->groups_rwlock);
+static bool ofproto_group_exists(const struct ofproto *ofproto,
+                                 uint32_t group_id)
+    OVS_EXCLUDED(ofproto->groups_rwlock);
 static enum ofperr add_group(struct ofproto *, struct ofputil_group_mod *);
 static bool handle_openflow(struct ofconn *, const struct ofpbuf *);
 static enum ofperr handle_flow_mod__(struct ofproto *, struct ofconn *,
@@ -297,9 +310,10 @@ static size_t allocated_ofproto_classes;
 /* Global lock that protects all flow table operations. */
 struct ovs_mutex ofproto_mutex = OVS_MUTEX_INITIALIZER;
 
-unsigned flow_eviction_threshold = OFPROTO_FLOW_EVICTION_THRESHOLD_DEFAULT;
-unsigned n_handler_threads;
-enum ofproto_flow_miss_model flow_miss_model = OFPROTO_HANDLE_MISS_AUTO;
+unsigned ofproto_flow_limit = OFPROTO_FLOW_LIMIT_DEFAULT;
+unsigned ofproto_max_idle = OFPROTO_MAX_IDLE_DEFAULT;
+
+size_t n_handlers, n_revalidators;
 
 /* Map from datapath name to struct ofproto, for use by unixctl commands. */
 static struct hmap all_ofprotos = HMAP_INITIALIZER(&all_ofprotos);
@@ -425,6 +439,7 @@ ofproto_enumerate_types(struct sset *types)
 {
     size_t i;
 
+    sset_clear(types);
     for (i = 0; i < n_ofproto_classes; i++) {
         ofproto_classes[i]->enumerate_types(types);
     }
@@ -524,6 +539,30 @@ ofproto_create(const char *datapath_name, const char *datapath_type,
     ovs_rwlock_init(&ofproto->groups_rwlock);
     hmap_init(&ofproto->groups);
     ovs_mutex_unlock(&ofproto_mutex);
+    ofproto->ogf.capabilities = OFPGFC_CHAINING | OFPGFC_SELECT_LIVENESS |
+                                OFPGFC_SELECT_WEIGHT;
+    ofproto->ogf.max_groups[OFPGT11_ALL] = OFPG_MAX;
+    ofproto->ogf.max_groups[OFPGT11_SELECT] = OFPG_MAX;
+    ofproto->ogf.max_groups[OFPGT11_INDIRECT] = OFPG_MAX;
+    ofproto->ogf.max_groups[OFPGT11_FF] = OFPG_MAX;
+    ofproto->ogf.actions[0] =
+        (1 << OFPAT11_OUTPUT) |
+        (1 << OFPAT11_COPY_TTL_OUT) |
+        (1 << OFPAT11_COPY_TTL_IN) |
+        (1 << OFPAT11_SET_MPLS_TTL) |
+        (1 << OFPAT11_DEC_MPLS_TTL) |
+        (1 << OFPAT11_PUSH_VLAN) |
+        (1 << OFPAT11_POP_VLAN) |
+        (1 << OFPAT11_PUSH_MPLS) |
+        (1 << OFPAT11_POP_MPLS) |
+        (1 << OFPAT11_SET_QUEUE) |
+        (1 << OFPAT11_GROUP) |
+        (1 << OFPAT11_SET_NW_TTL) |
+        (1 << OFPAT11_DEC_NW_TTL) |
+        (1 << OFPAT12_SET_FIELD);
+/* not supported:
+ *      (1 << OFPAT13_PUSH_PBB) |
+ *      (1 << OFPAT13_POP_PBB) */
 
     error = ofproto->ofproto_class->construct(ofproto);
     if (error) {
@@ -658,17 +697,17 @@ ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id)
 /* Sets the number of flows at which eviction from the kernel flow table
  * will occur. */
 void
-ofproto_set_flow_eviction_threshold(unsigned threshold)
+ofproto_set_flow_limit(unsigned limit)
 {
-    flow_eviction_threshold = MAX(OFPROTO_FLOW_EVICTION_THRESHOLD_MIN,
-                                  threshold);
+    ofproto_flow_limit = limit;
 }
 
-/* Sets the path for handling flow misses. */
+/* Sets the maximum idle time for flows in the datapath before they are
+ * expired. */
 void
-ofproto_set_flow_miss_model(unsigned model)
+ofproto_set_max_idle(unsigned max_idle)
 {
-    flow_miss_model = model;
+    ofproto_max_idle = max_idle;
 }
 
 /* If forward_bpdu is true, the NORMAL action will forward frames with
@@ -699,16 +738,22 @@ ofproto_set_mac_table_config(struct ofproto *ofproto, unsigned idle_time,
     }
 }
 
-/* Sets number of upcall handler threads.  The default is
- * (number of online cores - 2). */
 void
-ofproto_set_n_handler_threads(unsigned limit)
+ofproto_set_threads(int n_handlers_, int n_revalidators_)
 {
-    if (limit) {
-        n_handler_threads = limit;
-    } else {
-        int n_proc = sysconf(_SC_NPROCESSORS_ONLN);
-        n_handler_threads = n_proc > 2 ? n_proc - 2 : 1;
+    int threads = MAX(count_cpu_cores(), 2);
+
+    n_revalidators = MAX(n_revalidators_, 0);
+    n_handlers = MAX(n_handlers_, 0);
+
+    if (!n_revalidators) {
+        n_revalidators = n_handlers
+            ? MAX(threads - (int) n_handlers, 1)
+            : threads / 4 + 1;
+    }
+
+    if (!n_handlers) {
+        n_handlers = MAX(threads - (int) n_revalidators, 1);
     }
 }
 
@@ -853,6 +898,27 @@ ofproto_port_get_stp_status(struct ofproto *ofproto, ofp_port_t ofp_port,
             ? ofproto->ofproto_class->get_stp_port_status(ofport, s)
             : EOPNOTSUPP);
 }
+
+/* Retrieves STP port statistics of 'ofp_port' on 'ofproto' and stores it in
+ * 's'.  If the 'enabled' member in 's' is false, then the other members
+ * are not meaningful.
+ *
+ * Returns 0 if successful, otherwise a positive errno value.*/
+int
+ofproto_port_get_stp_stats(struct ofproto *ofproto, ofp_port_t ofp_port,
+                           struct ofproto_port_stp_stats *s)
+{
+    struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
+    if (!ofport) {
+        VLOG_WARN_RL(&rl, "%s: cannot get STP stats on nonexistent "
+                     "port %"PRIu16, ofproto->name, ofp_port);
+        return ENODEV;
+    }
+
+    return (ofproto->ofproto_class->get_stp_port_stats
+            ? ofproto->ofproto_class->get_stp_port_stats(ofport, s)
+            : EOPNOTSUPP);
+}
 \f
 /* Queue DSCP configuration. */
 
@@ -952,10 +1018,12 @@ ofproto_port_set_bfd(struct ofproto *ofproto, ofp_port_t ofp_port,
     }
 }
 
-/* Populates 'status' with key value pairs indicating the status of the BFD
- * session on 'ofp_port'.  This information is intended to be populated in the
- * OVS database.  Has no effect if 'ofp_port' is not na OpenFlow port in
- * 'ofproto'. */
+/* Populates 'status' with the status of BFD on 'ofport'.  Returns 0 on
+ * success.  Returns a negative number if there is no status change since
+ * last update.  Returns a positive errno otherwise.  Has no effect if
+ * 'ofp_port' is not an OpenFlow port in 'ofproto'.
+ *
+ * The caller must provide and own '*status'. */
 int
 ofproto_port_get_bfd_status(struct ofproto *ofproto, ofp_port_t ofp_port,
                             struct smap *status)
@@ -1080,6 +1148,24 @@ ofproto_get_n_tables(const struct ofproto *ofproto)
     return ofproto->n_tables;
 }
 
+/* Returns the number of Controller visible OpenFlow tables
+ * in 'ofproto'. This number will exclude Hidden tables.
+ * This funtion's return value should be less or equal to that of
+ * ofproto_get_n_tables() . */
+uint8_t
+ofproto_get_n_visible_tables(const struct ofproto *ofproto)
+{
+    uint8_t n = ofproto->n_tables;
+
+    /* Count only non-hidden tables in the number of tables.  (Hidden tables,
+     * if present, are always at the end.) */
+    while(n && (ofproto->tables[n - 1].flags & OFTABLE_HIDDEN)) {
+        n--;
+    }
+
+    return n;
+}
+
 /* Configures the OpenFlow table in 'ofproto' with id 'table_id' with the
  * settings from 's'.  'table_id' must be in the range 0 through the number of
  * OpenFlow tables in 'ofproto' minus 1, inclusive.
@@ -1107,7 +1193,7 @@ ofproto_configure_table(struct ofproto *ofproto, int table_id,
     }
 
     table->max_flows = s->max_flows;
-    ovs_rwlock_rdlock(&table->cls.rwlock);
+    fat_rwlock_wrlock(&table->cls.rwlock);
     if (classifier_count(&table->cls) > table->max_flows
         && table->eviction_fields) {
         /* 'table' contains more flows than allowed.  We might not be able to
@@ -1123,7 +1209,11 @@ ofproto_configure_table(struct ofproto *ofproto, int table_id,
             break;
         }
     }
-    ovs_rwlock_unlock(&table->cls.rwlock);
+
+    classifier_set_prefix_fields(&table->cls,
+                                 s->prefix_fields, s->n_prefix_fields);
+
+    fat_rwlock_unlock(&table->cls.rwlock);
 }
 \f
 bool
@@ -1152,7 +1242,7 @@ ofproto_rule_delete__(struct ofproto *ofproto, struct rule *rule,
     ofopgroup_submit(group);
 }
 
-/* Deletes 'rule' from 'cls' within 'ofproto'.
+/* Deletes 'rule' from 'ofproto'.
  *
  * Within an ofproto implementation, this function allows an ofproto
  * implementation to destroy any rules that remain when its ->destruct()
@@ -1198,9 +1288,9 @@ ofproto_flush__(struct ofproto *ofproto)
             continue;
         }
 
-        ovs_rwlock_rdlock(&table->cls.rwlock);
+        fat_rwlock_rdlock(&table->cls.rwlock);
         cls_cursor_init(&cursor, &table->cls, NULL);
-        ovs_rwlock_unlock(&table->cls.rwlock);
+        fat_rwlock_unlock(&table->cls.rwlock);
         CLS_CURSOR_FOR_EACH_SAFE (rule, next_rule, cr, &cursor) {
             if (!rule->pending) {
                 ofproto_rule_delete__(ofproto, rule, OFPRR_DELETE);
@@ -1221,9 +1311,9 @@ ofproto_destroy__(struct ofproto *ofproto)
     ovs_assert(list_is_empty(&ofproto->pending));
 
     destroy_rule_executes(ofproto);
-    guarded_list_destroy(&ofproto->rule_executes);
-
     delete_group(ofproto, OFPG_ALL);
+
+    guarded_list_destroy(&ofproto->rule_executes);
     ovs_rwlock_destroy(&ofproto->groups_rwlock);
     hmap_destroy(&ofproto->groups);
 
@@ -1283,7 +1373,8 @@ ofproto_destroy(struct ofproto *p)
     }
 
     p->ofproto_class->destruct(p);
-    ofproto_destroy__(p);
+    /* Destroying rules is deferred, must have 'ofproto' around for them. */
+    ovsrcu_postpone(ofproto_destroy__, p);
 }
 
 /* Destroys the datapath with the respective 'name' and 'type'.  With the Linux
@@ -1329,23 +1420,6 @@ ofproto_type_run(const char *datapath_type)
     return error;
 }
 
-int
-ofproto_type_run_fast(const char *datapath_type)
-{
-    const struct ofproto_class *class;
-    int error;
-
-    datapath_type = ofproto_normalize_type(datapath_type);
-    class = ofproto_class_find__(datapath_type);
-
-    error = class->type_run_fast ? class->type_run_fast(datapath_type) : 0;
-    if (error && error != EAGAIN) {
-        VLOG_ERR_RL(&rl, "%s: type_run_fast failed (%s)",
-                    datapath_type, ovs_strerror(error));
-    }
-    return error;
-}
-
 void
 ofproto_type_wait(const char *datapath_type)
 {
@@ -1375,10 +1449,8 @@ any_pending_ops(const struct ofproto *p)
 int
 ofproto_run(struct ofproto *p)
 {
-    struct sset changed_netdevs;
-    const char *changed_netdev;
-    struct ofport *ofport;
     int error;
+    uint64_t new_seq;
 
     error = p->ofproto_class->run(p);
     if (error && error != EAGAIN) {
@@ -1404,19 +1476,23 @@ ofproto_run(struct ofproto *p)
             }
 
             ovs_mutex_lock(&ofproto_mutex);
-            HEAP_FOR_EACH (evg, size_node, &table->eviction_groups_by_size) {
-                heap_rebuild(&evg->rules);
-            }
-
-            ovs_rwlock_rdlock(&table->cls.rwlock);
+            fat_rwlock_rdlock(&table->cls.rwlock);
             cls_cursor_init(&cursor, &table->cls, NULL);
             CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
-                if (!rule->eviction_group
-                    && (rule->idle_timeout || rule->hard_timeout)) {
-                    eviction_group_add_rule(rule);
+                if (rule->idle_timeout || rule->hard_timeout) {
+                    if (!rule->eviction_group) {
+                        eviction_group_add_rule(rule);
+                    } else {
+                        heap_raw_change(&rule->evg_node,
+                                        rule_eviction_priority(p, rule));
+                    }
                 }
             }
-            ovs_rwlock_unlock(&table->cls.rwlock);
+            fat_rwlock_unlock(&table->cls.rwlock);
+
+            HEAP_FOR_EACH (evg, size_node, &table->eviction_groups_by_size) {
+                heap_rebuild(&evg->rules);
+            }
             ovs_mutex_unlock(&ofproto_mutex);
         }
     }
@@ -1429,24 +1505,35 @@ ofproto_run(struct ofproto *p)
         }
     }
 
-    /* Update OpenFlow port status for any port whose netdev has changed.
-     *
-     * Refreshing a given 'ofport' can cause an arbitrary ofport to be
-     * destroyed, so it's not safe to update ports directly from the
-     * HMAP_FOR_EACH loop, or even to use HMAP_FOR_EACH_SAFE.  Instead, we
-     * need this two-phase approach. */
-    sset_init(&changed_netdevs);
-    HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
-        unsigned int change_seq = netdev_change_seq(ofport->netdev);
-        if (ofport->change_seq != change_seq) {
-            ofport->change_seq = change_seq;
-            sset_add(&changed_netdevs, netdev_get_name(ofport->netdev));
+    new_seq = seq_read(connectivity_seq_get());
+    if (new_seq != p->change_seq) {
+        struct sset devnames;
+        const char *devname;
+        struct ofport *ofport;
+
+        /* Update OpenFlow port status for any port whose netdev has changed.
+         *
+         * Refreshing a given 'ofport' can cause an arbitrary ofport to be
+         * destroyed, so it's not safe to update ports directly from the
+         * HMAP_FOR_EACH loop, or even to use HMAP_FOR_EACH_SAFE.  Instead, we
+         * need this two-phase approach. */
+        sset_init(&devnames);
+        HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
+            uint64_t port_change_seq;
+
+            port_change_seq = netdev_get_change_seq(ofport->netdev);
+            if (ofport->change_seq != port_change_seq) {
+                ofport->change_seq = port_change_seq;
+                sset_add(&devnames, netdev_get_name(ofport->netdev));
+            }
         }
+        SSET_FOR_EACH (devname, &devnames) {
+            update_port(p, devname);
+        }
+        sset_destroy(&devnames);
+
+        p->change_seq = new_seq;
     }
-    SSET_FOR_EACH (changed_netdev, &changed_netdevs) {
-        update_port(p, changed_netdev);
-    }
-    sset_destroy(&changed_netdevs);
 
     switch (p->state) {
     case S_OPENFLOW:
@@ -1471,7 +1558,7 @@ ofproto_run(struct ofproto *p)
         break;
 
     default:
-        NOT_REACHED();
+        OVS_NOT_REACHED();
     }
 
     if (time_msec() >= p->next_op_report) {
@@ -1514,40 +1601,14 @@ ofproto_run(struct ofproto *p)
     return error;
 }
 
-/* Performs periodic activity required by 'ofproto' that needs to be done
- * with the least possible latency.
- *
- * It makes sense to call this function a couple of times per poll loop, to
- * provide a significant performance boost on some benchmarks with the
- * ofproto-dpif implementation. */
-int
-ofproto_run_fast(struct ofproto *p)
-{
-    int error;
-
-    error = p->ofproto_class->run_fast ? p->ofproto_class->run_fast(p) : 0;
-    if (error && error != EAGAIN) {
-        VLOG_ERR_RL(&rl, "%s: fastpath run failed (%s)",
-                    p->name, ovs_strerror(error));
-    }
-    return error;
-}
-
 void
 ofproto_wait(struct ofproto *p)
 {
-    struct ofport *ofport;
-
     p->ofproto_class->wait(p);
     if (p->ofproto_class->port_poll_wait) {
         p->ofproto_class->port_poll_wait(p);
     }
-
-    HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
-        if (ofport->change_seq != netdev_change_seq(ofport->netdev)) {
-            poll_immediate_wake();
-        }
-    }
+    seq_wait(connectivity_seq_get(), p->change_seq);
 
     switch (p->state) {
     case S_OPENFLOW:
@@ -1587,9 +1648,9 @@ ofproto_get_memory_usage(const struct ofproto *ofproto, struct simap *usage)
 
     n_rules = 0;
     OFPROTO_FOR_EACH_TABLE (table, ofproto) {
-        ovs_rwlock_rdlock(&table->cls.rwlock);
+        fat_rwlock_rdlock(&table->cls.rwlock);
         n_rules += classifier_count(&table->cls);
-        ovs_rwlock_unlock(&table->cls.rwlock);
+        fat_rwlock_unlock(&table->cls.rwlock);
     }
     simap_increase(usage, "rules", n_rules);
 
@@ -1600,6 +1661,19 @@ ofproto_get_memory_usage(const struct ofproto *ofproto, struct simap *usage)
     connmgr_get_memory_usage(ofproto->connmgr, usage);
 }
 
+void
+ofproto_type_get_memory_usage(const char *datapath_type, struct simap *usage)
+{
+    const struct ofproto_class *class;
+
+    datapath_type = ofproto_normalize_type(datapath_type);
+    class = ofproto_class_find__(datapath_type);
+
+    if (class && class->type_get_memory_usage) {
+        class->type_get_memory_usage(datapath_type, usage);
+    }
+}
+
 void
 ofproto_get_ofproto_controller_info(const struct ofproto *ofproto,
                                     struct shash *info)
@@ -1741,12 +1815,18 @@ ofproto_port_add(struct ofproto *ofproto, struct netdev *netdev,
         update_port(ofproto, netdev_name);
     }
     if (ofp_portp) {
-        struct ofproto_port ofproto_port;
-
-        ofproto_port_query_by_name(ofproto, netdev_get_name(netdev),
-                                   &ofproto_port);
-        *ofp_portp = error ? OFPP_NONE : ofproto_port.ofp_port;
-        ofproto_port_destroy(&ofproto_port);
+        *ofp_portp = OFPP_NONE;
+        if (!error) {
+            struct ofproto_port ofproto_port;
+
+            error = ofproto_port_query_by_name(ofproto,
+                                               netdev_get_name(netdev),
+                                               &ofproto_port);
+            if (!error) {
+                *ofp_portp = ofproto_port.ofp_port;
+                ofproto_port_destroy(&ofproto_port);
+            }
+        }
     }
     return error;
 }
@@ -1798,6 +1878,30 @@ ofproto_port_del(struct ofproto *ofproto, ofp_port_t ofp_port)
     return error;
 }
 
+static void
+flow_mod_init(struct ofputil_flow_mod *fm,
+              const struct match *match, unsigned int priority,
+              const struct ofpact *ofpacts, size_t ofpacts_len,
+              enum ofp_flow_mod_command command)
+{
+    memset(fm, 0, sizeof *fm);
+    fm->match = *match;
+    fm->priority = priority;
+    fm->cookie = 0;
+    fm->new_cookie = 0;
+    fm->modify_cookie = false;
+    fm->table_id = 0;
+    fm->command = command;
+    fm->idle_timeout = 0;
+    fm->hard_timeout = 0;
+    fm->buffer_id = UINT32_MAX;
+    fm->out_port = OFPP_ANY;
+    fm->out_group = OFPG_ANY;
+    fm->flags = 0;
+    fm->ofpacts = CONST_CAST(struct ofpact *, ofpacts);
+    fm->ofpacts_len = ofpacts_len;
+}
+
 static int
 simple_flow_mod(struct ofproto *ofproto,
                 const struct match *match, unsigned int priority,
@@ -1806,22 +1910,7 @@ simple_flow_mod(struct ofproto *ofproto,
 {
     struct ofputil_flow_mod fm;
 
-    memset(&fm, 0, sizeof fm);
-    fm.match = *match;
-    fm.priority = priority;
-    fm.cookie = 0;
-    fm.new_cookie = 0;
-    fm.modify_cookie = false;
-    fm.table_id = 0;
-    fm.command = command;
-    fm.idle_timeout = 0;
-    fm.hard_timeout = 0;
-    fm.buffer_id = UINT32_MAX;
-    fm.out_port = OFPP_ANY;
-    fm.out_group = OFPG_ANY;
-    fm.flags = 0;
-    fm.ofpacts = CONST_CAST(struct ofpact *, ofpacts);
-    fm.ofpacts_len = ofpacts_len;
+    flow_mod_init(&fm, match, priority, ofpacts, ofpacts_len, command);
 
     return handle_flow_mod__(ofproto, NULL, &fm, NULL);
 }
@@ -1848,19 +1937,17 @@ ofproto_add_flow(struct ofproto *ofproto, const struct match *match,
 
     /* First do a cheap check whether the rule we're looking for already exists
      * with the actions that we want.  If it does, then we're done. */
-    ovs_rwlock_rdlock(&ofproto->tables[0].cls.rwlock);
+    fat_rwlock_rdlock(&ofproto->tables[0].cls.rwlock);
     rule = rule_from_cls_rule(classifier_find_match_exactly(
                                   &ofproto->tables[0].cls, match, priority));
     if (rule) {
-        ovs_mutex_lock(&rule->mutex);
-        must_add = !ofpacts_equal(rule->actions->ofpacts,
-                                  rule->actions->ofpacts_len,
+        const struct rule_actions *actions = rule_get_actions(rule);
+        must_add = !ofpacts_equal(actions->ofpacts, actions->ofpacts_len,
                                   ofpacts, ofpacts_len);
-        ovs_mutex_unlock(&rule->mutex);
     } else {
         must_add = true;
     }
-    ovs_rwlock_unlock(&ofproto->tables[0].cls.rwlock);
+    fat_rwlock_unlock(&ofproto->tables[0].cls.rwlock);
 
     /* If there's no such rule or the rule doesn't have the actions we want,
      * fall back to a executing a full flow mod.  We can't optimize this at
@@ -1882,9 +1969,92 @@ int
 ofproto_flow_mod(struct ofproto *ofproto, struct ofputil_flow_mod *fm)
     OVS_EXCLUDED(ofproto_mutex)
 {
+    /* Optimize for the most common case of a repeated learn action.
+     * If an identical flow already exists we only need to update its
+     * 'modified' time. */
+    if (fm->command == OFPFC_MODIFY_STRICT && fm->table_id != OFPTT_ALL
+        && !(fm->flags & OFPUTIL_FF_RESET_COUNTS)) {
+        struct oftable *table = &ofproto->tables[fm->table_id];
+        struct cls_rule match_rule;
+        struct rule *rule;
+        bool done = false;
+
+        cls_rule_init(&match_rule, &fm->match, fm->priority);
+        fat_rwlock_rdlock(&table->cls.rwlock);
+        rule = rule_from_cls_rule(classifier_find_rule_exactly(&table->cls,
+                                                               &match_rule));
+        if (rule) {
+            /* Reading many of the rule fields and writing on 'modified'
+             * requires the rule->mutex.  Also, rule->actions may change
+             * if rule->mutex is not held. */
+            const struct rule_actions *actions;
+
+            ovs_mutex_lock(&rule->mutex);
+            actions = rule_get_actions(rule);
+            if (rule->idle_timeout == fm->idle_timeout
+                && rule->hard_timeout == fm->hard_timeout
+                && rule->flags == (fm->flags & OFPUTIL_FF_STATE)
+                && (!fm->modify_cookie || (fm->new_cookie == rule->flow_cookie))
+                && ofpacts_equal(fm->ofpacts, fm->ofpacts_len,
+                                 actions->ofpacts, actions->ofpacts_len)) {
+                /* Rule already exists and need not change, only update the
+                   modified timestamp. */
+                rule->modified = time_msec();
+                done = true;
+            }
+            ovs_mutex_unlock(&rule->mutex);
+        }
+        fat_rwlock_unlock(&table->cls.rwlock);
+
+        if (done) {
+            return 0;
+        }
+    }
+
     return handle_flow_mod__(ofproto, NULL, fm, NULL);
 }
 
+/* Resets the modified time for 'rule' or an equivalent rule. If 'rule' is not
+ * in the classifier, but an equivalent rule is, unref 'rule' and ref the new
+ * rule. Otherwise if 'rule' is no longer installed in the classifier,
+ * reinstall it.
+ *
+ * Returns the rule whose modified time has been reset. */
+struct rule *
+ofproto_refresh_rule(struct rule *rule)
+{
+    const struct oftable *table = &rule->ofproto->tables[rule->table_id];
+    const struct cls_rule *cr = &rule->cr;
+    struct rule *r;
+
+    /* do_add_flow() requires that the rule is not installed. We lock the
+     * ofproto_mutex here so that another thread cannot add the flow before
+     * we get a chance to add it.*/
+    ovs_mutex_lock(&ofproto_mutex);
+
+    fat_rwlock_rdlock(&table->cls.rwlock);
+    r = rule_from_cls_rule(classifier_find_rule_exactly(&table->cls, cr));
+    if (r != rule) {
+        ofproto_rule_ref(r);
+    }
+    fat_rwlock_unlock(&table->cls.rwlock);
+
+    if (!r) {
+        do_add_flow(rule->ofproto, NULL, NULL, 0, rule);
+    } else if  (r != rule) {
+        ofproto_rule_unref(rule);
+        rule = r;
+    }
+    ovs_mutex_unlock(&ofproto_mutex);
+
+    /* Refresh the modified time for the rule. */
+    ovs_mutex_lock(&rule->mutex);
+    rule->modified = MAX(rule->modified, time_msec());
+    ovs_mutex_unlock(&rule->mutex);
+
+    return rule;
+}
+
 /* Searches for a rule with matching criteria exactly equal to 'target' in
  * ofproto's table 0 and, if it finds one, deletes it.
  *
@@ -1899,10 +2069,10 @@ ofproto_delete_flow(struct ofproto *ofproto,
 
     /* First do a cheap check whether the rule we're looking for has already
      * been deleted.  If so, then we're done. */
-    ovs_rwlock_rdlock(&cls->rwlock);
+    fat_rwlock_rdlock(&cls->rwlock);
     rule = rule_from_cls_rule(classifier_find_match_exactly(cls, target,
                                                             priority));
-    ovs_rwlock_unlock(&cls->rwlock);
+    fat_rwlock_unlock(&cls->rwlock);
     if (!rule) {
         return true;
     }
@@ -1964,9 +2134,13 @@ alloc_ofp_port(struct ofproto *ofproto, const char *netdev_name)
 
         /* Search for a free OpenFlow port number.  We try not to
          * immediately reuse them to prevent problems due to old
-         * flows. */
+         * flows.
+         *
+         * We limit the automatically assigned port numbers to the lower half
+         * of the port range, to reserve the upper half for assignment by
+         * controllers. */
         for (;;) {
-            if (++ofproto->alloc_port_no >= ofproto->max_ports) {
+            if (++ofproto->alloc_port_no >= MIN(ofproto->max_ports, 32768)) {
                 ofproto->alloc_port_no = 1;
             }
             last_used_at = ofport_get_usage(ofproto,
@@ -2088,7 +2262,7 @@ ofport_install(struct ofproto *p,
     }
     ofport->ofproto = p;
     ofport->netdev = netdev;
-    ofport->change_seq = netdev_change_seq(netdev);
+    ofport->change_seq = netdev_get_change_seq(netdev);
     ofport->pp = *pp;
     ofport->ofp_port = pp->port_no;
     ofport->created = time_msec();
@@ -2105,7 +2279,7 @@ ofport_install(struct ofproto *p,
     if (error) {
         goto error;
     }
-    connmgr_send_port_status(p->connmgr, pp, OFPPR_ADD);
+    connmgr_send_port_status(p->connmgr, NULL, pp, OFPPR_ADD);
     return;
 
 error:
@@ -2122,7 +2296,7 @@ error:
 static void
 ofport_remove(struct ofport *ofport)
 {
-    connmgr_send_port_status(ofport->ofproto->connmgr, &ofport->pp,
+    connmgr_send_port_status(ofport->ofproto->connmgr, NULL, &ofport->pp,
                              OFPPR_DELETE);
     ofport_destroy(ofport);
 }
@@ -2148,7 +2322,8 @@ ofport_modified(struct ofport *port, struct ofputil_phy_port *pp)
     memcpy(port->pp.hw_addr, pp->hw_addr, ETH_ADDR_LEN);
     port->pp.config = ((port->pp.config & ~OFPUTIL_PC_PORT_DOWN)
                         | (pp->config & OFPUTIL_PC_PORT_DOWN));
-    port->pp.state = pp->state;
+    port->pp.state = ((port->pp.state & ~OFPUTIL_PS_LINK_DOWN)
+                      | (pp->state & OFPUTIL_PS_LINK_DOWN));
     port->pp.curr = pp->curr;
     port->pp.advertised = pp->advertised;
     port->pp.supported = pp->supported;
@@ -2156,7 +2331,8 @@ ofport_modified(struct ofport *port, struct ofputil_phy_port *pp)
     port->pp.curr_speed = pp->curr_speed;
     port->pp.max_speed = pp->max_speed;
 
-    connmgr_send_port_status(port->ofproto->connmgr, &port->pp, OFPPR_MODIFY);
+    connmgr_send_port_status(port->ofproto->connmgr, NULL,
+                             &port->pp, OFPPR_MODIFY);
 }
 
 /* Update OpenFlow 'state' in 'port' and notify controller. */
@@ -2165,8 +2341,8 @@ ofproto_port_set_state(struct ofport *port, enum ofputil_port_state state)
 {
     if (port->pp.state != state) {
         port->pp.state = state;
-        connmgr_send_port_status(port->ofproto->connmgr, &port->pp,
-                                 OFPPR_MODIFY);
+        connmgr_send_port_status(port->ofproto->connmgr, NULL,
+                                 &port->pp, OFPPR_MODIFY);
     }
 }
 
@@ -2323,7 +2499,7 @@ update_port(struct ofproto *ofproto, const char *name)
              * Don't close the old netdev yet in case port_modified has to
              * remove a retained reference to it.*/
             port->netdev = netdev;
-            port->change_seq = netdev_change_seq(netdev);
+            port->change_seq = netdev_get_change_seq(netdev);
 
             if (port->ofproto->ofproto_class->port_modified) {
                 port->ofproto->ofproto_class->port_modified(port);
@@ -2468,113 +2644,72 @@ update_mtu(struct ofproto *p, struct ofport *port)
     }
 }
 \f
-void
-ofproto_rule_ref(struct rule *rule)
+static void
+ofproto_rule_destroy__(struct rule *rule)
+    OVS_NO_THREAD_SAFETY_ANALYSIS
 {
-    if (rule) {
-        unsigned int orig;
+    cls_rule_destroy(CONST_CAST(struct cls_rule *, &rule->cr));
+    rule_actions_destroy(rule_get_actions(rule));
+    ovs_mutex_destroy(&rule->mutex);
+    rule->ofproto->ofproto_class->rule_dealloc(rule);
+}
 
-        atomic_add(&rule->ref_count, 1, &orig);
-        ovs_assert(orig != 0);
-    }
+static void
+rule_destroy_cb(struct rule *rule)
+{
+    rule->ofproto->ofproto_class->rule_destruct(rule);
+    ofproto_rule_destroy__(rule);
 }
 
 void
-ofproto_rule_unref(struct rule *rule)
+ofproto_rule_ref(struct rule *rule)
 {
     if (rule) {
-        unsigned int orig;
-
-        atomic_sub(&rule->ref_count, 1, &orig);
-        if (orig == 1) {
-            rule->ofproto->ofproto_class->rule_destruct(rule);
-            ofproto_rule_destroy__(rule);
-        } else {
-            ovs_assert(orig != 0);
-        }
+        ovs_refcount_ref(&rule->ref_count);
     }
 }
 
-struct rule_actions *
-rule_get_actions(const struct rule *rule)
-    OVS_EXCLUDED(rule->mutex)
-{
-    struct rule_actions *actions;
-
-    ovs_mutex_lock(&rule->mutex);
-    actions = rule_get_actions__(rule);
-    ovs_mutex_unlock(&rule->mutex);
-
-    return actions;
-}
-
-struct rule_actions *
-rule_get_actions__(const struct rule *rule)
-    OVS_REQUIRES(rule->mutex)
-{
-    rule_actions_ref(rule->actions);
-    return rule->actions;
-}
-
-static void
-ofproto_rule_destroy__(struct rule *rule)
-    OVS_NO_THREAD_SAFETY_ANALYSIS
+/* Decrements 'rule''s ref_count and schedules 'rule' to be destroyed if the
+ * ref_count reaches 0.
+ *
+ * Use of RCU allows short term use (between RCU quiescent periods) without
+ * keeping a reference.  A reference must be taken if the rule needs to
+ * stay around accross the RCU quiescent periods. */
+void
+ofproto_rule_unref(struct rule *rule)
 {
-    cls_rule_destroy(CONST_CAST(struct cls_rule *, &rule->cr));
-    rule_actions_unref(rule->actions);
-    ovs_mutex_destroy(&rule->mutex);
-    rule->ofproto->ofproto_class->rule_dealloc(rule);
+    if (rule && ovs_refcount_unref(&rule->ref_count) == 1) {
+        ovsrcu_postpone(rule_destroy_cb, rule);
+    }
 }
 
 static uint32_t get_provider_meter_id(const struct ofproto *,
                                       uint32_t of_meter_id);
 
-/* Creates and returns a new 'struct rule_actions', with a ref_count of 1,
- * whose actions are a copy of from the 'ofpacts_len' bytes of 'ofpacts'. */
-struct rule_actions *
+/* Creates and returns a new 'struct rule_actions', whose actions are a copy
+ * of from the 'ofpacts_len' bytes of 'ofpacts'. */
+const struct rule_actions *
 rule_actions_create(const struct ofproto *ofproto,
                     const struct ofpact *ofpacts, size_t ofpacts_len)
 {
     struct rule_actions *actions;
 
-    actions = xmalloc(sizeof *actions);
-    atomic_init(&actions->ref_count, 1);
-    actions->ofpacts = xmemdup(ofpacts, ofpacts_len);
+    actions = xmalloc(sizeof *actions + ofpacts_len);
     actions->ofpacts_len = ofpacts_len;
     actions->provider_meter_id
         = get_provider_meter_id(ofproto,
                                 ofpacts_get_meter(ofpacts, ofpacts_len));
+    memcpy(actions->ofpacts, ofpacts, ofpacts_len);
 
     return actions;
 }
 
-/* Increments 'actions''s ref_count. */
-void
-rule_actions_ref(struct rule_actions *actions)
-{
-    if (actions) {
-        unsigned int orig;
-
-        atomic_add(&actions->ref_count, 1, &orig);
-        ovs_assert(orig != 0);
-    }
-}
-
-/* Decrements 'actions''s ref_count and frees 'actions' if the ref_count
- * reaches 0. */
+/* Free the actions after the RCU quiescent period is reached. */
 void
-rule_actions_unref(struct rule_actions *actions)
+rule_actions_destroy(const struct rule_actions *actions)
 {
     if (actions) {
-        unsigned int orig;
-
-        atomic_sub(&actions->ref_count, 1, &orig);
-        if (orig == 1) {
-            free(actions->ofpacts);
-            free(actions);
-        } else {
-            ovs_assert(orig != 0);
-        }
+        ovsrcu_postpone(free, CONST_CAST(struct rule_actions *, actions));
     }
 }
 
@@ -2584,9 +2719,13 @@ static bool
 ofproto_rule_has_out_port(const struct rule *rule, ofp_port_t port)
     OVS_REQUIRES(ofproto_mutex)
 {
-    return (port == OFPP_ANY
-            || ofpacts_output_to_port(rule->actions->ofpacts,
-                                      rule->actions->ofpacts_len, port));
+    if (port == OFPP_ANY) {
+        return true;
+    } else {
+        const struct rule_actions *actions = rule_get_actions(rule);
+        return ofpacts_output_to_port(actions->ofpacts,
+                                      actions->ofpacts_len, port);
+    }
 }
 
 /* Returns true if 'rule' has group and equals group_id. */
@@ -2594,9 +2733,13 @@ static bool
 ofproto_rule_has_out_group(const struct rule *rule, uint32_t group_id)
     OVS_REQUIRES(ofproto_mutex)
 {
-    return (group_id == OFPG11_ANY
-            || ofpacts_output_to_group(rule->actions->ofpacts,
-                                       rule->actions->ofpacts_len, group_id));
+    if (group_id == OFPG_ANY) {
+        return true;
+    } else {
+        const struct rule_actions *actions = rule_get_actions(rule);
+        return ofpacts_output_to_group(actions->ofpacts,
+                                       actions->ofpacts_len, group_id);
+    }
 }
 
 /* Returns true if a rule related to 'op' has an OpenFlow OFPAT_OUTPUT or
@@ -2620,7 +2763,7 @@ ofoperation_has_out_port(const struct ofoperation *op, ofp_port_t out_port)
                                       op->actions->ofpacts_len, out_port);
     }
 
-    NOT_REACHED();
+    OVS_NOT_REACHED();
 }
 
 static void
@@ -2642,11 +2785,10 @@ run_rule_executes(struct ofproto *ofproto)
 
     guarded_list_pop_all(&ofproto->rule_executes, &executes);
     LIST_FOR_EACH_SAFE (e, next, list_node, &executes) {
-        union flow_in_port in_port_;
         struct flow flow;
 
-        in_port_.ofp_port = e->in_port;
-        flow_extract(e->packet, 0, 0, NULL, &in_port_, &flow);
+        flow_extract(e->packet, NULL, &flow);
+        flow.in_port.ofp_port = e->in_port;
         ofproto->ofproto_class->rule_execute(e->rule, &flow, e->packet);
 
         rule_execute_destroy(e);
@@ -2676,19 +2818,27 @@ destroy_rule_executes(struct ofproto *ofproto)
 static bool
 ofproto_rule_is_hidden(const struct rule *rule)
 {
-    return rule->cr.priority > UINT16_MAX;
+    return (rule->cr.priority > UINT16_MAX);
 }
 
-static enum oftable_flags
-rule_get_flags(const struct rule *rule)
+static bool
+oftable_is_modifiable(const struct oftable *table,
+                      enum ofputil_flow_mod_flags flags)
 {
-    return rule->ofproto->tables[rule->table_id].flags;
+    if (flags & OFPUTIL_FF_NO_READONLY) {
+        return true;
+    }
+
+    return !(table->flags & OFTABLE_READONLY);
 }
 
 static bool
-rule_is_modifiable(const struct rule *rule)
+rule_is_modifiable(const struct rule *rule, enum ofputil_flow_mod_flags flags)
 {
-    return !(rule_get_flags(rule) & OFTABLE_READONLY);
+    const struct oftable *rule_table;
+
+    rule_table = &rule->ofproto->tables[rule->table_id];
+    return oftable_is_modifiable(rule_table, flags);
 }
 \f
 static enum ofperr
@@ -2706,26 +2856,14 @@ handle_features_request(struct ofconn *ofconn, const struct ofp_header *oh)
     struct ofport *port;
     bool arp_match_ip;
     struct ofpbuf *b;
-    int n_tables;
-    int i;
 
     ofproto->ofproto_class->get_features(ofproto, &arp_match_ip,
                                          &features.actions);
     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.) */
-    n_tables = ofproto->n_tables;
-    for (i = 0; i < ofproto->n_tables; i++) {
-        if (ofproto->tables[i].flags & OFTABLE_HIDDEN) {
-            n_tables = i;
-            break;
-        }
-    }
-
     features.datapath_id = ofproto->datapath_id;
     features.n_buffers = pktbuf_capacity();
-    features.n_tables = n_tables;
+    features.n_tables = ofproto_get_n_visible_tables(ofproto);
     features.capabilities = (OFPUTIL_C_FLOW_STATS | OFPUTIL_C_TABLE_STATS |
                              OFPUTIL_C_PORT_STATS | OFPUTIL_C_QUEUE_STATS);
     if (arp_match_ip) {
@@ -2816,30 +2954,33 @@ reject_slave_controller(struct ofconn *ofconn)
     }
 }
 
-/* Checks that the 'ofpacts_len' bytes of actions in 'ofpacts' are appropriate
- * for a packet with the prerequisites satisfied by 'flow' in table 'table_id'.
- * 'flow' may be temporarily modified, but is restored at return.
- */
+/* Checks that the 'ofpacts_len' bytes of action in 'ofpacts' are appropriate
+ * for 'ofproto':
+ *
+ *    - If they use a meter, then 'ofproto' has that meter configured.
+ *
+ *    - If they use any groups, then 'ofproto' has that group configured.
+ *
+ * Returns 0 if successful, otherwise an OpenFlow error. */
 static enum ofperr
 ofproto_check_ofpacts(struct ofproto *ofproto,
-                      const struct ofpact ofpacts[], size_t ofpacts_len,
-                      struct flow *flow, uint8_t table_id,
-                      bool enforce_consistency)
+                      const struct ofpact ofpacts[], size_t ofpacts_len)
 {
-    enum ofperr error;
+    const struct ofpact *a;
     uint32_t mid;
 
-    error = ofpacts_check(ofpacts, ofpacts_len, flow,
-                          u16_to_ofp(ofproto->max_ports), table_id,
-                          enforce_consistency);
-    if (error) {
-        return error;
-    }
-
     mid = ofpacts_get_meter(ofpacts, ofpacts_len);
     if (mid && get_provider_meter_id(ofproto, mid) == UINT32_MAX) {
         return OFPERR_OFPMMFC_INVALID_METER;
     }
+
+    OFPACT_FOR_EACH (a, ofpacts, ofpacts_len) {
+        if (a->type == OFPACT_GROUP
+            && !ofproto_group_exists(ofproto, ofpact_get_GROUP(a)->group_id)) {
+            return OFPERR_OFPBAC_BAD_OUT_GROUP;
+        }
+    }
+
     return 0;
 }
 
@@ -2852,7 +2993,6 @@ handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
     uint64_t ofpacts_stub[1024 / 8];
     struct ofpbuf ofpacts;
     struct flow flow;
-    union flow_in_port in_port_;
     enum ofperr error;
 
     COVERAGE_INC(ofproto_packet_out);
@@ -2874,7 +3014,6 @@ handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
         goto exit_free_ofpacts;
     }
 
-
     /* Get payload. */
     if (po.buffer_id != UINT32_MAX) {
         error = ofconn_pktbuf_retrieve(ofconn, po.buffer_id, &payload, NULL);
@@ -2887,10 +3026,9 @@ handle_packet_out(struct ofconn *ofconn, const struct ofp_header *oh)
     }
 
     /* Verify actions against packet, then send packet if successful. */
-    in_port_.ofp_port = po.in_port;
-    flow_extract(payload, 0, 0, NULL, &in_port_, &flow);
-    error = ofproto_check_ofpacts(p, po.ofpacts, po.ofpacts_len, &flow, 0,
-                                  oh->version > OFP10_VERSION);
+    flow_extract(payload, NULL, &flow);
+    flow.in_port.ofp_port = po.in_port;
+    error = ofproto_check_ofpacts(p, po.ofpacts, po.ofpacts_len);
     if (!error) {
         error = p->ofproto_class->packet_out(p, payload, &flow,
                                              po.ofpacts, po.ofpacts_len);
@@ -2904,26 +3042,27 @@ exit:
 }
 
 static void
-update_port_config(struct ofport *port,
+update_port_config(struct ofconn *ofconn, struct ofport *port,
                    enum ofputil_port_config config,
                    enum ofputil_port_config mask)
 {
-    enum ofputil_port_config old_config = port->pp.config;
-    enum ofputil_port_config toggle;
+    enum ofputil_port_config toggle = (config ^ port->pp.config) & mask;
 
-    toggle = (config ^ port->pp.config) & mask;
-    if (toggle & OFPUTIL_PC_PORT_DOWN) {
-        if (config & OFPUTIL_PC_PORT_DOWN) {
-            netdev_turn_flags_off(port->netdev, NETDEV_UP, NULL);
-        } else {
-            netdev_turn_flags_on(port->netdev, NETDEV_UP, NULL);
-        }
+    if (toggle & OFPUTIL_PC_PORT_DOWN
+        && (config & OFPUTIL_PC_PORT_DOWN
+            ? netdev_turn_flags_off(port->netdev, NETDEV_UP, NULL)
+            : netdev_turn_flags_on(port->netdev, NETDEV_UP, NULL))) {
+        /* We tried to bring the port up or down, but it failed, so don't
+         * update the "down" bit. */
         toggle &= ~OFPUTIL_PC_PORT_DOWN;
     }
 
-    port->pp.config ^= toggle;
-    if (port->pp.config != old_config) {
+    if (toggle) {
+        enum ofputil_port_config old_config = port->pp.config;
+        port->pp.config ^= toggle;
         port->ofproto->ofproto_class->port_reconfigured(port, old_config);
+        connmgr_send_port_status(port->ofproto->connmgr, ofconn, &port->pp,
+                                 OFPPR_MODIFY);
     }
 }
 
@@ -2951,7 +3090,7 @@ handle_port_mod(struct ofconn *ofconn, const struct ofp_header *oh)
     } else if (!eth_addr_equals(port->pp.hw_addr, pm.hw_addr)) {
         return OFPERR_OFPPMFC_BAD_HW_ADDR;
     } else {
-        update_port_config(port, pm.config, pm.mask);
+        update_port_config(ofconn, port, pm.config, pm.mask);
         if (pm.advertise) {
             netdev_set_advertisements(port->netdev, pm.advertise);
         }
@@ -3010,7 +3149,7 @@ handle_table_stats_request(struct ofconn *ofconn,
     ots = xcalloc(p->n_tables, sizeof *ots);
     for (i = 0; i < p->n_tables; i++) {
         ots[i].table_id = i;
-        sprintf(ots[i].name, "table%zu", i);
+        sprintf(ots[i].name, "table%"PRIuSIZE, i);
         ots[i].match = htonll(OFPXMT13_MASK);
         ots[i].wildcards = htonll(OFPXMT13_MASK);
         ots[i].write_actions = htonl(OFPAT11_OUTPUT);
@@ -3022,9 +3161,9 @@ handle_table_stats_request(struct ofconn *ofconn,
         ots[i].instructions = htonl(OFPIT11_ALL);
         ots[i].config = htonl(OFPTC11_TABLE_MISS_MASK);
         ots[i].max_entries = htonl(1000000); /* An arbitrary big number. */
-        ovs_rwlock_rdlock(&p->tables[i].cls.rwlock);
+        fat_rwlock_rdlock(&p->tables[i].cls.rwlock);
         ots[i].active_count = htonl(classifier_count(&p->tables[i].cls));
-        ovs_rwlock_unlock(&p->tables[i].cls.rwlock);
+        fat_rwlock_unlock(&p->tables[i].cls.rwlock);
     }
 
     p->ofproto_class->get_tables(p, ots);
@@ -3126,8 +3265,7 @@ handle_port_desc_stats_request(struct ofconn *ofconn,
 static uint32_t
 hash_cookie(ovs_be64 cookie)
 {
-    return hash_2words((OVS_FORCE uint64_t)cookie >> 32,
-                       (OVS_FORCE uint64_t)cookie);
+    return hash_uint64((OVS_FORCE uint64_t)cookie);
 }
 
 static void
@@ -3171,14 +3309,11 @@ calc_duration(long long int start, long long int now,
 }
 
 /* Checks whether 'table_id' is 0xff or a valid table ID in 'ofproto'.  Returns
- * 0 if 'table_id' is OK, otherwise an OpenFlow error code.  */
-static enum ofperr
+ * true if 'table_id' is OK, false otherwise.  */
+static bool
 check_table_id(const struct ofproto *ofproto, uint8_t table_id)
 {
-    return (table_id == 0xff || table_id < ofproto->n_tables
-            ? 0
-            : OFPERR_OFPBRC_BAD_TABLE_ID);
-
+    return table_id == OFPTT_ALL || table_id < ofproto->n_tables;
 }
 
 static struct oftable *
@@ -3362,12 +3497,12 @@ collect_rules_loose(struct ofproto *ofproto,
     OVS_REQUIRES(ofproto_mutex)
 {
     struct oftable *table;
-    enum ofperr error;
+    enum ofperr error = 0;
 
     rule_collection_init(rules);
 
-    error = check_table_id(ofproto, criteria->table_id);
-    if (error) {
+    if (!check_table_id(ofproto, criteria->table_id)) {
+        error = OFPERR_OFPBRC_BAD_TABLE_ID;
         goto exit;
     }
 
@@ -3389,7 +3524,7 @@ collect_rules_loose(struct ofproto *ofproto,
             struct cls_cursor cursor;
             struct rule *rule;
 
-            ovs_rwlock_rdlock(&table->cls.rwlock);
+            fat_rwlock_rdlock(&table->cls.rwlock);
             cls_cursor_init(&cursor, &table->cls, &criteria->cr);
             CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
                 error = collect_rule(rule, criteria, rules);
@@ -3397,7 +3532,7 @@ collect_rules_loose(struct ofproto *ofproto,
                     break;
                 }
             }
-            ovs_rwlock_unlock(&table->cls.rwlock);
+            fat_rwlock_unlock(&table->cls.rwlock);
         }
     }
 
@@ -3423,12 +3558,12 @@ collect_rules_strict(struct ofproto *ofproto,
     OVS_REQUIRES(ofproto_mutex)
 {
     struct oftable *table;
-    int error;
+    int error = 0;
 
     rule_collection_init(rules);
 
-    error = check_table_id(ofproto, criteria->table_id);
-    if (error) {
+    if (!check_table_id(ofproto, criteria->table_id)) {
+        error = OFPERR_OFPBRC_BAD_TABLE_ID;
         goto exit;
     }
 
@@ -3449,10 +3584,10 @@ collect_rules_strict(struct ofproto *ofproto,
         FOR_EACH_MATCHING_TABLE (table, criteria->table_id, ofproto) {
             struct rule *rule;
 
-            ovs_rwlock_rdlock(&table->cls.rwlock);
+            fat_rwlock_rdlock(&table->cls.rwlock);
             rule = rule_from_cls_rule(classifier_find_rule_exactly(
                                           &table->cls, &criteria->cr));
-            ovs_rwlock_unlock(&table->cls.rwlock);
+            fat_rwlock_unlock(&table->cls.rwlock);
             if (rule) {
                 error = collect_rule(rule, criteria, rules);
                 if (error) {
@@ -3518,7 +3653,7 @@ handle_flow_stats_request(struct ofconn *ofconn,
         long long int now = time_msec();
         struct ofputil_flow_stats fs;
         long long int created, used, modified;
-        struct rule_actions *actions;
+        const struct rule_actions *actions;
         enum ofputil_flow_mod_flags flags;
 
         ovs_mutex_lock(&rule->mutex);
@@ -3526,27 +3661,25 @@ handle_flow_stats_request(struct ofconn *ofconn,
         fs.idle_timeout = rule->idle_timeout;
         fs.hard_timeout = rule->hard_timeout;
         created = rule->created;
-        used = rule->used;
         modified = rule->modified;
-        actions = rule_get_actions__(rule);
+        actions = rule_get_actions(rule);
         flags = rule->flags;
         ovs_mutex_unlock(&rule->mutex);
 
+        ofproto->ofproto_class->rule_get_stats(rule, &fs.packet_count,
+                                               &fs.byte_count, &used);
+
         minimatch_expand(&rule->cr.match, &fs.match);
         fs.table_id = rule->table_id;
         calc_duration(created, now, &fs.duration_sec, &fs.duration_nsec);
         fs.priority = rule->cr.priority;
         fs.idle_age = age_secs(now - used);
         fs.hard_age = age_secs(now - modified);
-        ofproto->ofproto_class->rule_get_stats(rule, &fs.packet_count,
-                                               &fs.byte_count);
         fs.ofpacts = actions->ofpacts;
         fs.ofpacts_len = actions->ofpacts_len;
 
         fs.flags = flags;
         ofputil_append_flow_stats_reply(&fs, &replies);
-
-        rule_actions_unref(actions);
     }
 
     rule_collection_unref(&rules);
@@ -3561,14 +3694,14 @@ static void
 flow_stats_ds(struct rule *rule, struct ds *results)
 {
     uint64_t packet_count, byte_count;
-    struct rule_actions *actions;
-    long long int created;
+    const struct rule_actions *actions;
+    long long int created, used;
 
-    rule->ofproto->ofproto_class->rule_get_stats(rule,
-                                                 &packet_count, &byte_count);
+    rule->ofproto->ofproto_class->rule_get_stats(rule, &packet_count,
+                                                 &byte_count, &used);
 
     ovs_mutex_lock(&rule->mutex);
-    actions = rule_get_actions__(rule);
+    actions = rule_get_actions(rule);
     created = rule->created;
     ovs_mutex_unlock(&rule->mutex);
 
@@ -3585,8 +3718,6 @@ flow_stats_ds(struct rule *rule, struct ds *results)
     ofpacts_format(actions->ofpacts, actions->ofpacts_len, results);
 
     ds_put_cstr(results, "\n");
-
-    rule_actions_unref(actions);
 }
 
 /* Adds a pretty-printed description of all flows to 'results', including
@@ -3600,12 +3731,12 @@ ofproto_get_all_flows(struct ofproto *p, struct ds *results)
         struct cls_cursor cursor;
         struct rule *rule;
 
-        ovs_rwlock_rdlock(&table->cls.rwlock);
+        fat_rwlock_rdlock(&table->cls.rwlock);
         cls_cursor_init(&cursor, &table->cls, NULL);
         CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
             flow_stats_ds(rule, results);
         }
-        ovs_rwlock_unlock(&table->cls.rwlock);
+        fat_rwlock_unlock(&table->cls.rwlock);
     }
 }
 
@@ -3618,20 +3749,22 @@ ofproto_get_netflow_ids(const struct ofproto *ofproto,
     ofproto->ofproto_class->get_netflow_ids(ofproto, engine_type, engine_id);
 }
 
-/* Checks the status of CFM configured on 'ofp_port' within 'ofproto'.  Returns
- * true if the port's CFM status was successfully stored into '*status'.
- * Returns false if the port did not have CFM configured, in which case
- * '*status' is indeterminate.
+/* Checks the status of CFM configured on 'ofp_port' within 'ofproto'.
+ * Returns 0 if the port's CFM status was successfully stored into
+ * '*status'.  Returns positive errno if the port did not have CFM
+ * configured.  Returns negative number if there is no status change
+ * since last update.
  *
- * The caller must provide and owns '*status', and must free 'status->rmps'. */
-bool
+ * The caller must provide and own '*status', and must free 'status->rmps'.
+ * '*status' is indeterminate if the return value is non-zero. */
+int
 ofproto_port_get_cfm_status(const struct ofproto *ofproto, ofp_port_t ofp_port,
                             struct ofproto_cfm_status *status)
 {
     struct ofport *ofport = ofproto_get_port(ofproto, ofp_port);
-    return (ofport
-            && ofproto->ofproto_class->get_cfm_status
-            && ofproto->ofproto_class->get_cfm_status(ofport, status));
+    return (ofport && ofproto->ofproto_class->get_cfm_status
+            ? ofproto->ofproto_class->get_cfm_status(ofport, status)
+            : EOPNOTSUPP);
 }
 
 static enum ofperr
@@ -3676,9 +3809,10 @@ handle_aggregate_stats_request(struct ofconn *ofconn,
         struct rule *rule = rules.rules[i];
         uint64_t packet_count;
         uint64_t byte_count;
+        long long int used;
 
         ofproto->ofproto_class->rule_get_stats(rule, &packet_count,
-                                               &byte_count);
+                                               &byte_count, &used);
 
         if (packet_count == UINT64_MAX) {
             unknown_packets = true;
@@ -3877,14 +4011,13 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
     OVS_REQUIRES(ofproto_mutex)
 {
     struct oftable *table;
-    struct ofopgroup *group;
     struct cls_rule cr;
     struct rule *rule;
     uint8_t table_id;
-    int error;
+    int error = 0;
 
-    error = check_table_id(ofproto, fm->table_id);
-    if (error) {
+    if (!check_table_id(ofproto, fm->table_id)) {
+        error = OFPERR_OFPBRC_BAD_TABLE_ID;
         return error;
     }
 
@@ -3909,19 +4042,27 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
 
     table = &ofproto->tables[table_id];
 
-    if (table->flags & OFTABLE_READONLY) {
+    if (!oftable_is_modifiable(table, fm->flags)) {
         return OFPERR_OFPBRC_EPERM;
     }
 
+    if (!(fm->flags & OFPUTIL_FF_HIDDEN_FIELDS)) {
+        if (!match_has_default_hidden_fields(&fm->match)) {
+            VLOG_WARN_RL(&rl, "%s: (add_flow) only internal flows can set "
+                         "non-default values to hidden fields", ofproto->name);
+            return OFPERR_OFPBRC_EPERM;
+        }
+    }
+
     cls_rule_init(&cr, &fm->match, fm->priority);
 
     /* Transform "add" into "modify" if there's an existing identical flow. */
-    ovs_rwlock_rdlock(&table->cls.rwlock);
+    fat_rwlock_rdlock(&table->cls.rwlock);
     rule = rule_from_cls_rule(classifier_find_rule_exactly(&table->cls, &cr));
-    ovs_rwlock_unlock(&table->cls.rwlock);
+    fat_rwlock_unlock(&table->cls.rwlock);
     if (rule) {
         cls_rule_destroy(&cr);
-        if (!rule_is_modifiable(rule)) {
+        if (!rule_is_modifiable(rule, fm->flags)) {
             return OFPERR_OFPBRC_EPERM;
         } else if (rule->pending) {
             return OFPROTO_POSTPONE;
@@ -3938,15 +4079,6 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
         }
     }
 
-    /* Verify actions. */
-    error = ofproto_check_ofpacts(ofproto, fm->ofpacts, fm->ofpacts_len,
-                                  &fm->match.flow, table_id,
-                                  request && request->version > OFP10_VERSION);
-    if (error) {
-        cls_rule_destroy(&cr);
-        return error;
-    }
-
     /* Serialize against pending deletion. */
     if (is_flow_deletion_pending(ofproto, &cr, table_id)) {
         cls_rule_destroy(&cr);
@@ -3957,9 +4089,9 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
     if (fm->flags & OFPUTIL_FF_CHECK_OVERLAP) {
         bool overlaps;
 
-        ovs_rwlock_rdlock(&table->cls.rwlock);
+        fat_rwlock_rdlock(&table->cls.rwlock);
         overlaps = classifier_rule_overlaps(&table->cls, &cr);
-        ovs_rwlock_unlock(&table->cls.rwlock);
+        fat_rwlock_unlock(&table->cls.rwlock);
 
         if (overlaps) {
             cls_rule_destroy(&cr);
@@ -3986,10 +4118,10 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
     /* Initialize base state. */
     *CONST_CAST(struct ofproto **, &rule->ofproto) = ofproto;
     cls_rule_move(CONST_CAST(struct cls_rule *, &rule->cr), &cr);
-    atomic_init(&rule->ref_count, 1);
+    ovs_refcount_init(&rule->ref_count);
     rule->pending = NULL;
     rule->flow_cookie = fm->new_cookie;
-    rule->created = rule->modified = rule->used = time_msec();
+    rule->created = rule->modified = time_msec();
 
     ovs_mutex_init(&rule->mutex);
     ovs_mutex_lock(&rule->mutex);
@@ -3999,7 +4131,8 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
 
     *CONST_CAST(uint8_t *, &rule->table_id) = table - ofproto->tables;
     rule->flags = fm->flags & OFPUTIL_FF_STATE;
-    rule->actions = rule_actions_create(ofproto, fm->ofpacts, fm->ofpacts_len);
+    ovsrcu_set(&rule->actions,
+               rule_actions_create(ofproto, fm->ofpacts, fm->ofpacts_len));
     list_init(&rule->meter_list_node);
     rule->eviction_group = NULL;
     list_init(&rule->expirable);
@@ -4015,14 +4148,25 @@ add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
     }
 
     /* Insert rule. */
+    do_add_flow(ofproto, ofconn, request, fm->buffer_id, rule);
+
+    return error;
+}
+
+static void
+do_add_flow(struct ofproto *ofproto, struct ofconn *ofconn,
+            const struct ofp_header *request, uint32_t buffer_id,
+            struct rule *rule)
+    OVS_REQUIRES(ofproto_mutex)
+{
+    struct ofopgroup *group;
+
     oftable_insert_rule(rule);
 
-    group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
+    group = ofopgroup_create(ofproto, ofconn, request, buffer_id);
     ofoperation_create(group, rule, OFOPERATION_ADD, 0);
     ofproto->ofproto_class->rule_insert(rule);
     ofopgroup_submit(group);
-
-    return error;
 }
 \f
 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
@@ -4045,40 +4189,29 @@ modify_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
     enum ofperr error;
     size_t i;
 
-    /* Verify actions before we start to modify any rules, to avoid partial
-     * flow table modifications. */
-    for (i = 0; i < rules->n; i++) {
-        struct rule *rule = rules->rules[i];
-
-        error = ofpacts_check(fm->ofpacts, fm->ofpacts_len, &fm->match.flow,
-                              u16_to_ofp(ofproto->max_ports), rule->table_id,
-                              request && request->version > OFP10_VERSION);
-        if (error) {
-            return error;
-        }
-    }
-
     type = fm->command == OFPFC_ADD ? OFOPERATION_REPLACE : OFOPERATION_MODIFY;
     group = ofopgroup_create(ofproto, ofconn, request, fm->buffer_id);
     error = OFPERR_OFPBRC_EPERM;
     for (i = 0; i < rules->n; i++) {
         struct rule *rule = rules->rules[i];
+        const struct rule_actions *actions;
         struct ofoperation *op;
         bool actions_changed;
         bool reset_counters;
 
         /* FIXME: Implement OFPFUTIL_FF_RESET_COUNTS */
 
-        if (rule_is_modifiable(rule)) {
+        if (rule_is_modifiable(rule, fm->flags)) {
             /* At least one rule is modifiable, don't report EPERM error. */
             error = 0;
         } else {
             continue;
         }
 
+        actions = rule_get_actions(rule);
         actions_changed = !ofpacts_equal(fm->ofpacts, fm->ofpacts_len,
-                                         rule->actions->ofpacts,
-                                         rule->actions->ofpacts_len);
+                                         actions->ofpacts,
+                                         actions->ofpacts_len);
 
         op = ofoperation_create(group, rule, type, 0);
 
@@ -4103,15 +4236,13 @@ modify_flows__(struct ofproto *ofproto, struct ofconn *ofconn,
 
         reset_counters = (fm->flags & OFPUTIL_FF_RESET_COUNTS) != 0;
         if (actions_changed || reset_counters) {
-            struct rule_actions *new_actions;
+            const struct rule_actions *new_actions;
 
-            op->actions = rule->actions;
+            op->actions = rule_get_actions(rule);
             new_actions = rule_actions_create(ofproto,
                                               fm->ofpacts, fm->ofpacts_len);
 
-            ovs_mutex_lock(&rule->mutex);
-            rule->actions = new_actions;
-            ovs_mutex_unlock(&rule->mutex);
+            ovsrcu_set(&rule->actions, new_actions);
 
             rule->ofproto->ofproto_class->rule_modify_actions(rule,
                                                               reset_counters);
@@ -4292,6 +4423,7 @@ ofproto_rule_send_removed(struct rule *rule, uint8_t reason)
     OVS_REQUIRES(ofproto_mutex)
 {
     struct ofputil_flow_removed fr;
+    long long int used;
 
     if (ofproto_rule_is_hidden(rule) ||
         !(rule->flags & OFPUTIL_FF_SEND_FLOW_REM)) {
@@ -4310,7 +4442,7 @@ ofproto_rule_send_removed(struct rule *rule, uint8_t reason)
     fr.hard_timeout = rule->hard_timeout;
     ovs_mutex_unlock(&rule->mutex);
     rule->ofproto->ofproto_class->rule_get_stats(rule, &fr.packet_count,
-                                                 &fr.byte_count);
+                                                 &fr.byte_count, &used);
 
     connmgr_send_flow_removed(rule->ofproto->connmgr, &fr);
 }
@@ -4390,7 +4522,12 @@ 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);
+                                    &ofpacts,
+                                    u16_to_ofp(ofproto->max_ports),
+                                    ofproto->n_tables);
+    if (!error) {
+        error = ofproto_check_ofpacts(ofproto, fm.ofpacts, fm.ofpacts_len);
+    }
     if (!error) {
         error = handle_flow_mod__(ofproto, ofconn, &fm, oh);
     }
@@ -4686,25 +4823,25 @@ ofproto_compose_flow_refresh_update(const struct rule *rule,
     if (!(flags & NXFMF_ACTIONS)) {
         actions = NULL;
     } else if (!op) {
-        actions = rule->actions;
+        actions = rule_get_actions(rule);
     } else {
         /* An operation is in progress.  Use the previous version of the flow's
          * actions, so that when the operation commits we report the change. */
         switch (op->type) {
         case OFOPERATION_ADD:
-            NOT_REACHED();
+            OVS_NOT_REACHED();
 
         case OFOPERATION_MODIFY:
         case OFOPERATION_REPLACE:
-            actions = op->actions ? op->actions : rule->actions;
+            actions = op->actions ? op->actions : rule_get_actions(rule);
             break;
 
         case OFOPERATION_DELETE:
-            actions = rule->actions;
+            actions = rule_get_actions(rule);
             break;
 
         default:
-            NOT_REACHED();
+            OVS_NOT_REACHED();
         }
     }
     fu.ofpacts = actions ? actions->ofpacts : NULL;
@@ -4788,13 +4925,13 @@ ofproto_collect_ofmonitor_refresh_rules(const struct ofmonitor *m,
         struct cls_cursor cursor;
         struct rule *rule;
 
-        ovs_rwlock_rdlock(&table->cls.rwlock);
+        fat_rwlock_rdlock(&table->cls.rwlock);
         cls_cursor_init(&cursor, &table->cls, &target);
         CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
             ovs_assert(!rule->pending); /* XXX */
             ofproto_collect_ofmonitor_refresh_rule(m, rule, seqno, rules);
         }
-        ovs_rwlock_unlock(&table->cls.rwlock);
+        fat_rwlock_unlock(&table->cls.rwlock);
     }
 
     HMAP_FOR_EACH (op, hmap_node, &ofproto->deletions) {
@@ -5294,7 +5431,7 @@ ofproto_group_write_lookup(const struct ofproto *ofproto, uint32_t group_id,
 }
 
 static bool
-ofproto_group_exists(const struct ofproto *ofproto, uint32_t group_id)
+ofproto_group_exists__(const struct ofproto *ofproto, uint32_t group_id)
     OVS_REQ_RDLOCK(ofproto->groups_rwlock)
 {
     struct ofgroup *grp;
@@ -5308,6 +5445,44 @@ ofproto_group_exists(const struct ofproto *ofproto, uint32_t group_id)
     return false;
 }
 
+static bool
+ofproto_group_exists(const struct ofproto *ofproto, uint32_t group_id)
+    OVS_EXCLUDED(ofproto->groups_rwlock)
+{
+    bool exists;
+
+    ovs_rwlock_rdlock(&ofproto->groups_rwlock);
+    exists = ofproto_group_exists__(ofproto, group_id);
+    ovs_rwlock_unlock(&ofproto->groups_rwlock);
+
+    return exists;
+}
+
+static uint32_t
+group_get_ref_count(struct ofgroup *group)
+    OVS_EXCLUDED(ofproto_mutex)
+{
+    struct ofproto *ofproto = group->ofproto;
+    struct rule_criteria criteria;
+    struct rule_collection rules;
+    struct match match;
+    enum ofperr error;
+    uint32_t count;
+
+    match_init_catchall(&match);
+    rule_criteria_init(&criteria, 0xff, &match, 0, htonll(0), htonll(0),
+                       OFPP_ANY, group->group_id);
+    ovs_mutex_lock(&ofproto_mutex);
+    error = collect_rules_loose(ofproto, &criteria, &rules);
+    ovs_mutex_unlock(&ofproto_mutex);
+    rule_criteria_destroy(&criteria);
+
+    count = !error && rules.n < UINT32_MAX ? rules.n : UINT32_MAX;
+
+    rule_collection_destroy(&rules);
+    return count;
+}
+
 static void
 append_group_stats(struct ofgroup *group, struct list *replies)
     OVS_REQ_RDLOCK(group->rwlock)
@@ -5319,14 +5494,16 @@ append_group_stats(struct ofgroup *group, struct list *replies)
 
     ogs.bucket_stats = xmalloc(group->n_buckets * sizeof *ogs.bucket_stats);
 
+    /* Provider sets the packet and byte counts, we do the rest. */
+    ogs.ref_count = group_get_ref_count(group);
+    ogs.n_buckets = group->n_buckets;
+
     error = (ofproto->ofproto_class->group_get_stats
              ? ofproto->ofproto_class->group_get_stats(group, &ogs)
              : EOPNOTSUPP);
     if (error) {
-        ogs.ref_count = UINT32_MAX;
         ogs.packet_count = UINT64_MAX;
         ogs.byte_count = UINT64_MAX;
-        ogs.n_buckets = group->n_buckets;
         memset(ogs.bucket_stats, 0xff,
                ogs.n_buckets * sizeof *ogs.bucket_stats);
     }
@@ -5415,6 +5592,49 @@ handle_group_features_stats_request(struct ofconn *ofconn,
     return 0;
 }
 
+static enum ofperr
+handle_queue_get_config_request(struct ofconn *ofconn,
+                                const struct ofp_header *oh)
+{
+   struct ofproto *p = ofconn_get_ofproto(ofconn);
+   struct netdev_queue_dump queue_dump;
+   struct ofport *ofport;
+   unsigned int queue_id;
+   struct ofpbuf *reply;
+   struct smap details;
+   ofp_port_t request;
+   enum ofperr error;
+
+   error = ofputil_decode_queue_get_config_request(oh, &request);
+   if (error) {
+       return error;
+   }
+
+   ofport = ofproto_get_port(p, request);
+   if (!ofport) {
+      return OFPERR_OFPQOFC_BAD_PORT;
+   }
+
+   reply = ofputil_encode_queue_get_config_reply(oh);
+
+   smap_init(&details);
+   NETDEV_QUEUE_FOR_EACH (&queue_id, &details, &queue_dump, ofport->netdev) {
+       struct ofputil_queue_config queue;
+
+       /* None of the existing queues have compatible properties, so we
+        * hard-code omitting min_rate and max_rate. */
+       queue.queue_id = queue_id;
+       queue.min_rate = UINT16_MAX;
+       queue.max_rate = UINT16_MAX;
+       ofputil_append_queue_get_config_reply(reply, &queue);
+   }
+   smap_destroy(&details);
+
+   ofconn_send_reply(ofconn, reply);
+
+   return 0;
+}
+
 /* Implements OFPGC11_ADD
  * in which no matching flow already exists in the flow table.
  *
@@ -5472,7 +5692,7 @@ add_group(struct ofproto *ofproto, struct ofputil_group_mod *gm)
         goto unlock_out;
     }
 
-    if (ofproto_group_exists(ofproto, gm->group_id)) {
+    if (ofproto_group_exists__(ofproto, gm->group_id)) {
         error = OFPERR_OFPGMFC_GROUP_EXISTS;
         goto unlock_out;
     }
@@ -5567,6 +5787,15 @@ static void
 delete_group__(struct ofproto *ofproto, struct ofgroup *ofgroup)
     OVS_RELEASES(ofproto->groups_rwlock)
 {
+    struct match match;
+    struct ofputil_flow_mod fm;
+
+    /* Delete all flow entries containing this group in a group action */
+    match_init_catchall(&match);
+    flow_mod_init(&fm, &match, 0, NULL, 0, OFPFC_DELETE);
+    fm.out_group = ofgroup->group_id;
+    handle_flow_mod__(ofproto, NULL, &fm, NULL);
+
     /* Must wait until existing readers are done,
      * while holding the container's write lock at the same time. */
     ovs_rwlock_wrlock(&ofgroup->rwlock);
@@ -5650,9 +5879,42 @@ handle_group_mod(struct ofconn *ofconn, const struct ofp_header *oh)
     }
 }
 
+enum ofproto_table_config
+ofproto_table_get_config(const struct ofproto *ofproto, uint8_t table_id)
+{
+    unsigned int value;
+    atomic_read(&ofproto->tables[table_id].config, &value);
+    return (enum ofproto_table_config)value;
+}
+
+static enum ofperr
+table_mod(struct ofproto *ofproto, const struct ofputil_table_mod *tm)
+{
+    /* Only accept currently supported configurations */
+    if (tm->config & ~OFPTC11_TABLE_MISS_MASK) {
+        return OFPERR_OFPTMFC_BAD_CONFIG;
+    }
+
+    if (tm->table_id == OFPTT_ALL) {
+        int i;
+        for (i = 0; i < ofproto->n_tables; i++) {
+            atomic_store(&ofproto->tables[i].config,
+                         (unsigned int)tm->config);
+        }
+    } else if (!check_table_id(ofproto, tm->table_id)) {
+        return OFPERR_OFPTMFC_BAD_TABLE;
+    } else {
+        atomic_store(&ofproto->tables[tm->table_id].config,
+                     (unsigned int)tm->config);
+    }
+
+    return 0;
+}
+
 static enum ofperr
 handle_table_mod(struct ofconn *ofconn, const struct ofp_header *oh)
 {
+    struct ofproto *ofproto = ofconn_get_ofproto(ofconn);
     struct ofputil_table_mod tm;
     enum ofperr error;
 
@@ -5666,15 +5928,14 @@ handle_table_mod(struct ofconn *ofconn, const struct ofp_header *oh)
         return error;
     }
 
-    /* XXX Actual table mod support is not implemented yet. */
-    return 0;
+    return table_mod(ofproto, &tm);
 }
 
 static enum ofperr
 handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     OVS_EXCLUDED(ofproto_mutex)
 {
-    const struct ofp_header *oh = msg->data;
+    const struct ofp_header *oh = ofpbuf_data(msg);
     enum ofptype type;
     enum ofperr error;
 
@@ -5799,10 +6060,8 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_GROUP_FEATURES_STATS_REQUEST:
         return handle_group_features_stats_request(ofconn, oh);
 
-        /* FIXME: Change the following once they are implemented: */
     case OFPTYPE_QUEUE_GET_CONFIG_REQUEST:
-    case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
-        /* fallthrough */
+        return handle_queue_get_config_request(ofconn, oh);
 
     case OFPTYPE_HELLO:
     case OFPTYPE_ERROR:
@@ -5831,7 +6090,9 @@ handle_openflow__(struct ofconn *ofconn, const struct ofpbuf *msg)
     case OFPTYPE_METER_STATS_REPLY:
     case OFPTYPE_METER_CONFIG_STATS_REPLY:
     case OFPTYPE_METER_FEATURES_STATS_REPLY:
+    case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
     case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+    case OFPTYPE_ROLE_STATUS:
     default:
         if (ofpmsg_is_stat_request(oh)) {
             return OFPERR_OFPBRC_BAD_STAT;
@@ -5847,7 +6108,7 @@ handle_openflow(struct ofconn *ofconn, const struct ofpbuf *ofp_msg)
 {
     int error = handle_openflow__(ofconn, ofp_msg);
     if (error && error != OFPROTO_POSTPONE) {
-        ofconn_send_error(ofconn, ofp_msg->data, error);
+        ofconn_send_error(ofconn, ofpbuf_data(ofp_msg), error);
     }
     COVERAGE_INC(ofproto_recv_openflow);
     return error != OFPROTO_POSTPONE;
@@ -6017,7 +6278,7 @@ ofopgroup_complete(struct ofopgroup *group)
                 break;
 
             default:
-                NOT_REACHED();
+                OVS_NOT_REACHED();
             }
 
             ofmonitor_report(ofproto->connmgr, rule, event_type,
@@ -6060,10 +6321,12 @@ ofopgroup_complete(struct ofopgroup *group)
             if (!op->error) {
                 long long int now = time_msec();
 
+                ovs_mutex_lock(&rule->mutex);
                 rule->modified = now;
                 if (op->type == OFOPERATION_REPLACE) {
-                    rule->created = rule->used = now;
+                    rule->created = now;
                 }
+                ovs_mutex_unlock(&rule->mutex);
             } else {
                 ofproto_rule_change_cookie(ofproto, rule, op->flow_cookie);
                 ovs_mutex_lock(&rule->mutex);
@@ -6071,22 +6334,22 @@ ofopgroup_complete(struct ofopgroup *group)
                 rule->hard_timeout = op->hard_timeout;
                 ovs_mutex_unlock(&rule->mutex);
                 if (op->actions) {
-                    struct rule_actions *old_actions;
+                    const struct rule_actions *old_actions;
 
                     ovs_mutex_lock(&rule->mutex);
-                    old_actions = rule->actions;
-                    rule->actions = op->actions;
+                    old_actions = rule_get_actions(rule);
+                    ovsrcu_set(&rule->actions, op->actions);
                     ovs_mutex_unlock(&rule->mutex);
 
                     op->actions = NULL;
-                    rule_actions_unref(old_actions);
+                    rule_actions_destroy(old_actions);
                 }
                 rule->flags = op->flags;
             }
             break;
 
         default:
-            NOT_REACHED();
+            OVS_NOT_REACHED();
         }
 
         ofoperation_destroy(op);
@@ -6165,7 +6428,7 @@ ofoperation_destroy(struct ofoperation *op)
         hmap_remove(&group->ofproto->deletions, &op->hmap_node);
     }
     list_remove(&op->group_node);
-    rule_actions_unref(op->actions);
+    rule_actions_destroy(op->actions);
     free(op);
 }
 
@@ -6426,26 +6689,34 @@ eviction_group_find(struct oftable *table, uint32_t id)
 
 /* Returns an eviction priority for 'rule'.  The return value should be
  * interpreted so that higher priorities make a rule more attractive candidates
- * for eviction. */
+ * for eviction.
+ * Called only if have a timeout. */
 static uint32_t
-rule_eviction_priority(struct rule *rule)
+rule_eviction_priority(struct ofproto *ofproto, struct rule *rule)
     OVS_REQUIRES(ofproto_mutex)
 {
-    long long int hard_expiration;
-    long long int idle_expiration;
-    long long int expiration;
+    long long int expiration = LLONG_MAX;
+    long long int modified;
     uint32_t expiration_offset;
 
-    /* Calculate time of expiration. */
+    /* 'modified' needs protection even when we hold 'ofproto_mutex'. */
     ovs_mutex_lock(&rule->mutex);
-    hard_expiration = (rule->hard_timeout
-                       ? rule->modified + rule->hard_timeout * 1000
-                       : LLONG_MAX);
-    idle_expiration = (rule->idle_timeout
-                       ? rule->used + rule->idle_timeout * 1000
-                       : LLONG_MAX);
-    expiration = MIN(hard_expiration, idle_expiration);
+    modified = rule->modified;
     ovs_mutex_unlock(&rule->mutex);
+
+    if (rule->hard_timeout) {
+        expiration = modified + rule->hard_timeout * 1000;
+    }
+    if (rule->idle_timeout) {
+        uint64_t packets, bytes;
+        long long int used;
+        long long int idle_expiration;
+
+        ofproto->ofproto_class->rule_get_stats(rule, &packets, &bytes, &used);
+        idle_expiration = used + rule->idle_timeout * 1000;
+        expiration = MIN(expiration, idle_expiration);
+    }
+
     if (expiration == LLONG_MAX) {
         return 0;
     }
@@ -6475,9 +6746,9 @@ eviction_group_add_rule(struct rule *rule)
     struct oftable *table = &ofproto->tables[rule->table_id];
     bool has_timeout;
 
-    ovs_mutex_lock(&rule->mutex);
+    /* Timeouts may be modified only when holding 'ofproto_mutex'.  We have it
+     * so no additional protection is needed. */
     has_timeout = rule->hard_timeout || rule->idle_timeout;
-    ovs_mutex_unlock(&rule->mutex);
 
     if (table->eviction_fields && has_timeout) {
         struct eviction_group *evg;
@@ -6486,7 +6757,7 @@ eviction_group_add_rule(struct rule *rule)
 
         rule->eviction_group = evg;
         heap_insert(&evg->rules, &rule->evg_node,
-                    rule_eviction_priority(rule));
+                    rule_eviction_priority(ofproto, rule));
         eviction_group_resized(table, evg);
     }
 }
@@ -6498,8 +6769,9 @@ static void
 oftable_init(struct oftable *table)
 {
     memset(table, 0, sizeof *table);
-    classifier_init(&table->cls);
+    classifier_init(&table->cls, flow_segment_u32s);
     table->max_flows = UINT_MAX;
+    atomic_init(&table->config, (unsigned int)OFPROTO_TABLE_MISS_DEFAULT);
 }
 
 /* Destroys 'table', including its classifier and eviction groups.
@@ -6508,9 +6780,9 @@ oftable_init(struct oftable *table)
 static void
 oftable_destroy(struct oftable *table)
 {
-    ovs_rwlock_rdlock(&table->cls.rwlock);
+    fat_rwlock_rdlock(&table->cls.rwlock);
     ovs_assert(classifier_is_empty(&table->cls));
-    ovs_rwlock_unlock(&table->cls.rwlock);
+    fat_rwlock_unlock(&table->cls.rwlock);
     oftable_disable_eviction(table);
     classifier_destroy(&table->cls);
     free(table->name);
@@ -6592,12 +6864,12 @@ oftable_enable_eviction(struct oftable *table,
     hmap_init(&table->eviction_groups_by_id);
     heap_init(&table->eviction_groups_by_size);
 
-    ovs_rwlock_rdlock(&table->cls.rwlock);
+    fat_rwlock_rdlock(&table->cls.rwlock);
     cls_cursor_init(&cursor, &table->cls, NULL);
     CLS_CURSOR_FOR_EACH (rule, cr, &cursor) {
         eviction_group_add_rule(rule);
     }
-    ovs_rwlock_unlock(&table->cls.rwlock);
+    fat_rwlock_unlock(&table->cls.rwlock);
 }
 
 /* Removes 'rule' from the oftable that contains it. */
@@ -6607,9 +6879,9 @@ oftable_remove_rule__(struct ofproto *ofproto, struct rule *rule)
 {
     struct classifier *cls = &ofproto->tables[rule->table_id].cls;
 
-    ovs_rwlock_wrlock(&cls->rwlock);
+    fat_rwlock_wrlock(&cls->rwlock);
     classifier_remove(cls, CONST_CAST(struct cls_rule *, &rule->cr));
-    ovs_rwlock_unlock(&cls->rwlock);
+    fat_rwlock_unlock(&cls->rwlock);
 
     cookies_remove(ofproto, rule);
 
@@ -6638,6 +6910,7 @@ oftable_insert_rule(struct rule *rule)
 {
     struct ofproto *ofproto = rule->ofproto;
     struct oftable *table = &ofproto->tables[rule->table_id];
+    const struct rule_actions *actions;
     bool may_expire;
 
     ovs_mutex_lock(&rule->mutex);
@@ -6650,15 +6923,16 @@ oftable_insert_rule(struct rule *rule)
 
     cookies_insert(ofproto, rule);
 
-    if (rule->actions->provider_meter_id != UINT32_MAX) {
-        uint32_t meter_id = ofpacts_get_meter(rule->actions->ofpacts,
-                                              rule->actions->ofpacts_len);
+    actions = rule_get_actions(rule);
+    if (actions->provider_meter_id != UINT32_MAX) {
+        uint32_t meter_id = ofpacts_get_meter(actions->ofpacts,
+                                              actions->ofpacts_len);
         struct meter *meter = ofproto->meters[meter_id];
         list_insert(&meter->rules, &rule->meter_list_node);
     }
-    ovs_rwlock_wrlock(&table->cls.rwlock);
+    fat_rwlock_wrlock(&table->cls.rwlock);
     classifier_insert(&table->cls, CONST_CAST(struct cls_rule *, &rule->cr));
-    ovs_rwlock_unlock(&table->cls.rwlock);
+    fat_rwlock_unlock(&table->cls.rwlock);
     eviction_group_add_rule(rule);
 }
 \f
@@ -6725,10 +6999,10 @@ ofproto_get_vlan_usage(struct ofproto *ofproto, unsigned long int *vlan_bitmap)
     ofproto->vlans_changed = false;
 
     OFPROTO_FOR_EACH_TABLE (oftable, ofproto) {
-        const struct cls_table *table;
+        const struct cls_subtable *table;
 
-        ovs_rwlock_rdlock(&oftable->cls.rwlock);
-        HMAP_FOR_EACH (table, hmap_node, &oftable->cls.tables) {
+        fat_rwlock_rdlock(&oftable->cls.rwlock);
+        HMAP_FOR_EACH (table, hmap_node, &oftable->cls.subtables) {
             if (minimask_get_vid_mask(&table->mask) == VLAN_VID_MASK) {
                 const struct cls_rule *rule;
 
@@ -6739,7 +7013,7 @@ ofproto_get_vlan_usage(struct ofproto *ofproto, unsigned long int *vlan_bitmap)
                 }
             }
         }
-        ovs_rwlock_unlock(&oftable->cls.rwlock);
+        fat_rwlock_unlock(&oftable->cls.rwlock);
     }
 }