X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=ofproto%2Fofproto.c;h=c683e3b630069671c60b4bdf2210fdcdef6ee42d;hb=4e8e4213a815a30216e855a805a8bcd5b8c5a886;hp=a9e270b9fc0012c3e1efbd1f78e641b525e4b0bf;hpb=9dbb9d5e94d1db5a0fb5cb3867c26d7c3d07d0c4;p=openvswitch

diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c
index a9e270b9..c683e3b6 100644
--- a/ofproto/ofproto.c
+++ b/ofproto/ofproto.c
@@ -30,6 +30,8 @@
 #include "dpif.h"
 #include "dynamic-string.h"
 #include "fail-open.h"
+#include "hash.h"
+#include "hmap.h"
 #include "in-band.h"
 #include "mac-learning.h"
 #include "netdev.h"
@@ -46,7 +48,6 @@
 #include "pinsched.h"
 #include "pktbuf.h"
 #include "poll-loop.h"
-#include "port-array.h"
 #include "rconn.h"
 #include "shash.h"
 #include "status.h"
@@ -68,9 +69,12 @@ enum {
     TABLEID_CLASSIFIER = 1
 };
 
+
 struct ofport {
+    struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
     struct netdev *netdev;
     struct ofp_phy_port opp;    /* In host byte order. */
+    uint16_t odp_port;
 };
 
 static void ofport_free(struct ofport *);
@@ -85,7 +89,7 @@ static int xlate_actions(const union ofp_action *in, size_t n_in,
 struct rule {
     struct cls_rule cr;
 
-    uint64_t flow_cookie;       /* Controller-issued identifier. 
+    uint64_t flow_cookie;       /* Controller-issued identifier.
                                    (Kept in network-byte order.) */
     uint16_t idle_timeout;      /* In seconds from time of last use. */
     uint16_t hard_timeout;      /* In seconds from time of creation. */
@@ -272,8 +276,7 @@ struct ofproto {
     /* Datapath. */
     struct dpif *dpif;
     struct netdev_monitor *netdev_monitor;
-    struct port_array ports;    /* Index is ODP port nr; ofport->opp.port_no is
-                                 * OFP port nr. */
+    struct hmap ports;          /* Contains "struct ofport"s. */
     struct shash port_by_name;
     uint32_t max_ports;
 
@@ -336,6 +339,7 @@ static void handle_openflow(struct ofconn *, struct ofproto *,
 
 static void refresh_port_groups(struct ofproto *);
 
+static struct ofport *get_port(const struct ofproto *, uint16_t odp_port);
 static void update_port(struct ofproto *, const char *devname);
 static int init_ports(struct ofproto *);
 static void reinit_ports(struct ofproto *);
@@ -388,7 +392,7 @@ ofproto_create(const char *datapath, const char *datapath_type,
     /* Initialize datapath. */
     p->dpif = dpif;
     p->netdev_monitor = netdev_monitor_create();
-    port_array_init(&p->ports);
+    hmap_init(&p->ports);
     shash_init(&p->port_by_name);
     p->max_ports = stats.max_ports;
 
@@ -528,7 +532,7 @@ find_controller_by_target(struct ofproto *ofproto, const char *target)
 {
     struct ofconn *ofconn;
 
-    HMAP_FOR_EACH_WITH_HASH (ofconn, struct ofconn, hmap_node,
+    HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node,
                              hash_string(target, 0), &ofproto->controllers) {
         if (!strcmp(ofconn_get_target(ofconn), target)) {
             return ofconn;
@@ -553,7 +557,7 @@ update_in_band_remotes(struct ofproto *ofproto)
 
     /* Add all the remotes. */
     discovery = false;
-    HMAP_FOR_EACH (ofconn, struct ofconn, hmap_node, &ofproto->controllers) {
+    HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) {
         struct sockaddr_in *sin = &addrs[n_addrs];
 
         if (ofconn->band == OFPROTO_OUT_OF_BAND) {
@@ -612,7 +616,7 @@ update_fail_open(struct ofproto *p)
 
         n = 0;
         rconns = xmalloc(hmap_count(&p->controllers) * sizeof *rconns);
-        HMAP_FOR_EACH (ofconn, struct ofconn, hmap_node, &p->controllers) {
+        HMAP_FOR_EACH (ofconn, hmap_node, &p->controllers) {
             rconns[n++] = ofconn->rconn;
         }
 
@@ -661,8 +665,7 @@ ofproto_set_controllers(struct ofproto *p,
     /* Delete controllers that are no longer configured.
      * Update configuration of all now-existing controllers. */
     ss_exists = false;
-    HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, hmap_node,
-                        &p->controllers) {
+    HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &p->controllers) {
         struct ofproto_controller *c;
 
         c = shash_find_data(&new_controllers, ofconn_get_target(ofconn));
@@ -678,8 +681,7 @@ ofproto_set_controllers(struct ofproto *p,
 
     /* Delete services that are no longer configured.
      * Update configuration of all now-existing services. */
-    HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, struct ofservice, node,
-                        &p->services) {
+    HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
         struct ofproto_controller *c;
 
         c = shash_find_data(&new_controllers,
@@ -718,7 +720,7 @@ ofproto_reconnect_controllers(struct ofproto *ofproto)
 {
     struct ofconn *ofconn;
 
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &ofproto->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
         rconn_reconnect(ofconn->rconn);
     }
 }
@@ -883,12 +885,11 @@ ofproto_set_sflow(struct ofproto *ofproto,
     if (oso) {
         if (!os) {
             struct ofport *ofport;
-            unsigned int odp_port;
 
             os = ofproto->sflow = ofproto_sflow_create(ofproto->dpif);
             refresh_port_groups(ofproto);
-            PORT_ARRAY_FOR_EACH (ofport, &ofproto->ports, odp_port) {
-                ofproto_sflow_add_port(os, odp_port,
+            HMAP_FOR_EACH (ofport, hmap_node, &ofproto->ports) {
+                ofproto_sflow_add_port(os, ofport->odp_port,
                                        netdev_get_name(ofport->netdev));
             }
         }
@@ -932,8 +933,7 @@ ofproto_destroy(struct ofproto *p)
 {
     struct ofservice *ofservice, *next_ofservice;
     struct ofconn *ofconn, *next_ofconn;
-    struct ofport *ofport;
-    unsigned int port_no;
+    struct ofport *ofport, *next_ofport;
     size_t i;
 
     if (!p) {
@@ -951,15 +951,15 @@ ofproto_destroy(struct ofproto *p)
     ofproto_flush_flows(p);
     classifier_destroy(&p->cls);
 
-    LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
-                        &p->all_conns) {
+    LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
         ofconn_destroy(ofconn);
     }
     hmap_destroy(&p->controllers);
 
     dpif_close(p->dpif);
     netdev_monitor_destroy(p->netdev_monitor);
-    PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
+    HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) {
+        hmap_remove(&p->ports, &ofport->hmap_node);
         ofport_free(ofport);
     }
     shash_destroy(&p->port_by_name);
@@ -968,8 +968,7 @@ ofproto_destroy(struct ofproto *p)
     netflow_destroy(p->netflow);
     ofproto_sflow_destroy(p->sflow);
 
-    HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, struct ofservice, node,
-                        &p->services) {
+    HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) {
         ofservice_destroy(p, ofservice);
     }
     hmap_destroy(&p->services);
@@ -987,7 +986,7 @@ ofproto_destroy(struct ofproto *p)
     free(p->serial_desc);
     free(p->dp_desc);
 
-    port_array_destroy(&p->ports);
+    hmap_destroy(&p->ports);
 
     free(p);
 }
@@ -1041,7 +1040,7 @@ add_snooper(struct ofproto *ofproto, struct vconn *vconn)
 
     /* Pick a controller for monitoring. */
     best = NULL;
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &ofproto->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
         if (ofconn->type == OFCONN_PRIMARY
             && (!best || snoop_preference(ofconn) > snoop_preference(best))) {
             best = ofconn;
@@ -1071,7 +1070,6 @@ ofproto_run1(struct ofproto *p)
 
     for (i = 0; i < 50; i++) {
         struct ofpbuf *buf;
-        int error;
 
         error = dpif_recv(p->dpif, &buf);
         if (error) {
@@ -1105,8 +1103,7 @@ ofproto_run1(struct ofproto *p)
         in_band_run(p->in_band);
     }
 
-    LIST_FOR_EACH_SAFE (ofconn, next_ofconn, struct ofconn, node,
-                        &p->all_conns) {
+    LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) {
         ofconn_run(ofconn, p);
     }
 
@@ -1116,13 +1113,12 @@ ofproto_run1(struct ofproto *p)
         fail_open_run(p->fail_open);
     }
 
-    HMAP_FOR_EACH (ofservice, struct ofservice, node, &p->services) {
+    HMAP_FOR_EACH (ofservice, node, &p->services) {
         struct vconn *vconn;
         int retval;
 
         retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn);
         if (!retval) {
-            struct ofconn *ofconn;
             struct rconn *rconn;
             char *name;
 
@@ -1213,7 +1209,7 @@ ofproto_wait(struct ofproto *p)
     dpif_recv_wait(p->dpif);
     dpif_port_poll_wait(p->dpif);
     netdev_monitor_poll_wait(p->netdev_monitor);
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &p->all_conns) {
         ofconn_wait(ofconn);
     }
     if (p->in_band) {
@@ -1236,7 +1232,7 @@ ofproto_wait(struct ofproto *p)
     } else if (p->next_expiration != LLONG_MAX) {
         poll_timer_wait_until(p->next_expiration);
     }
-    HMAP_FOR_EACH (ofservice, struct ofservice, node, &p->services) {
+    HMAP_FOR_EACH (ofservice, node, &p->services) {
         pvconn_wait(ofservice->pvconn);
     }
     for (i = 0; i < p->n_snoops; i++) {
@@ -1291,7 +1287,7 @@ ofproto_add_flow(struct ofproto *p,
 {
     struct rule *rule;
     rule = rule_create(p, NULL, actions, n_actions,
-                       idle_timeout >= 0 ? idle_timeout : 5 /* XXX */, 
+                       idle_timeout >= 0 ? idle_timeout : 5 /* XXX */,
                        0, 0, false);
     cls_rule_from_flow(flow, wildcards, priority, &rule->cr);
     rule_insert(p, rule, NULL, 0);
@@ -1345,13 +1341,12 @@ reinit_ports(struct ofproto *p)
 {
     struct svec devnames;
     struct ofport *ofport;
-    unsigned int port_no;
     struct odp_port *odp_ports;
     size_t n_odp_ports;
     size_t i;
 
     svec_init(&devnames);
-    PORT_ARRAY_FOR_EACH (ofport, &p->ports, port_no) {
+    HMAP_FOR_EACH (ofport, hmap_node, &p->ports) {
         svec_add (&devnames, (char *) ofport->opp.name);
     }
     dpif_port_list(p->dpif, &odp_ports, &n_odp_ports);
@@ -1373,15 +1368,14 @@ refresh_port_group(struct ofproto *p, unsigned int group)
     uint16_t *ports;
     size_t n_ports;
     struct ofport *port;
-    unsigned int port_no;
 
     assert(group == DP_GROUP_ALL || group == DP_GROUP_FLOOD);
 
-    ports = xmalloc(port_array_count(&p->ports) * sizeof *ports);
+    ports = xmalloc(hmap_count(&p->ports) * sizeof *ports);
     n_ports = 0;
-    PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
+    HMAP_FOR_EACH (port, hmap_node, &p->ports) {
         if (group == DP_GROUP_ALL || !(port->opp.config & OFPPC_NO_FLOOD)) {
-            ports[n_ports++] = port_no;
+            ports[n_ports++] = port->odp_port;
         }
     }
     dpif_port_group_set(p->dpif, group, ports, n_ports);
@@ -1425,6 +1419,7 @@ make_ofport(const struct odp_port *odp_port)
 
     ofport = xmalloc(sizeof *ofport);
     ofport->netdev = netdev;
+    ofport->odp_port = odp_port->port;
     ofport->opp.port_no = odp_port_to_ofp_port(odp_port->port);
     netdev_get_etheraddr(netdev, ofport->opp.hw_addr);
     memcpy(ofport->opp.name, odp_port->devname,
@@ -1446,7 +1441,7 @@ make_ofport(const struct odp_port *odp_port)
 static bool
 ofport_conflicts(const struct ofproto *p, const struct odp_port *odp_port)
 {
-    if (port_array_get(&p->ports, odp_port->port)) {
+    if (get_port(p, odp_port->port)) {
         VLOG_WARN_RL(&rl, "ignoring duplicate port %"PRIu16" in datapath",
                      odp_port->port);
         return true;
@@ -1483,7 +1478,7 @@ send_port_status(struct ofproto *p, const struct ofport *ofport,
 {
     /* XXX Should limit the number of queued port status change messages. */
     struct ofconn *ofconn;
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &p->all_conns) {
         struct ofp_port_status *ops;
         struct ofpbuf *b;
 
@@ -1505,28 +1500,25 @@ send_port_status(struct ofproto *p, const struct ofport *ofport,
 static void
 ofport_install(struct ofproto *p, struct ofport *ofport)
 {
-    uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
     const char *netdev_name = (const char *) ofport->opp.name;
 
     netdev_monitor_add(p->netdev_monitor, ofport->netdev);
-    port_array_set(&p->ports, odp_port, ofport);
+    hmap_insert(&p->ports, &ofport->hmap_node, hash_int(ofport->odp_port, 0));
     shash_add(&p->port_by_name, netdev_name, ofport);
     if (p->sflow) {
-        ofproto_sflow_add_port(p->sflow, odp_port, netdev_name);
+        ofproto_sflow_add_port(p->sflow, ofport->odp_port, netdev_name);
     }
 }
 
 static void
 ofport_remove(struct ofproto *p, struct ofport *ofport)
 {
-    uint16_t odp_port = ofp_port_to_odp_port(ofport->opp.port_no);
-
     netdev_monitor_remove(p->netdev_monitor, ofport->netdev);
-    port_array_delete(&p->ports, odp_port);
+    hmap_remove(&p->ports, &ofport->hmap_node);
     shash_delete(&p->port_by_name,
                  shash_find(&p->port_by_name, (char *) ofport->opp.name));
     if (p->sflow) {
-        ofproto_sflow_del_port(p->sflow, odp_port);
+        ofproto_sflow_del_port(p->sflow, ofport->odp_port);
     }
 }
 
@@ -1539,6 +1531,20 @@ ofport_free(struct ofport *ofport)
     }
 }
 
+static struct ofport *
+get_port(const struct ofproto *ofproto, uint16_t odp_port)
+{
+    struct ofport *port;
+
+    HMAP_FOR_EACH_IN_BUCKET (port, hmap_node,
+                             hash_int(odp_port, 0), &ofproto->ports) {
+        if (port->odp_port == odp_port) {
+            return port;
+        }
+    }
+    return NULL;
+}
+
 static void
 update_port(struct ofproto *p, const char *devname)
 {
@@ -1566,7 +1572,7 @@ update_port(struct ofproto *p, const char *devname)
              * reliably but more portably by comparing the old port's MAC
              * against the new port's MAC.  However, this code isn't that smart
              * and always sends an OFPPR_MODIFY (XXX). */
-            old_ofport = port_array_get(&p->ports, odp_port.port);
+            old_ofport = get_port(p, odp_port.port);
         }
     } else if (error != ENOENT && error != ENODEV) {
         VLOG_WARN_RL(&rl, "dpif_port_query_by_name returned unexpected error "
@@ -1836,8 +1842,8 @@ ofservice_lookup(struct ofproto *ofproto, const char *target)
 {
     struct ofservice *ofservice;
 
-    HMAP_FOR_EACH_WITH_HASH (ofservice, struct ofservice, node,
-                             hash_string(target, 0), &ofproto->services) {
+    HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0),
+                             &ofproto->services) {
         if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) {
             return ofservice;
         }
@@ -1900,7 +1906,7 @@ rule_destroy(struct ofproto *ofproto, struct rule *rule)
 {
     if (!rule->super) {
         struct rule *subrule, *next;
-        LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
+        LIST_FOR_EACH_SAFE (subrule, next, list, &rule->list) {
             revalidate_rule(ofproto, subrule);
         }
     } else {
@@ -1927,41 +1933,44 @@ rule_has_out_port(const struct rule *rule, uint16_t out_port)
     return false;
 }
 
+/* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
+ * 'packet', which arrived on 'in_port'.
+ *
+ * Takes ownership of 'packet'. */
 static bool
 execute_odp_actions(struct ofproto *ofproto, uint16_t in_port,
                     const union odp_action *actions, size_t n_actions,
-                    const struct ofpbuf *packet)
+                    struct ofpbuf *packet)
 {
-    if (n_actions > 0 && actions[0].type == ODPAT_CONTROLLER) {
+    if (n_actions == 1 && actions[0].type == ODPAT_CONTROLLER) {
         /* As an optimization, avoid a round-trip from userspace to kernel to
          * userspace.  This also avoids possibly filling up kernel packet
          * buffers along the way. */
-        struct ofpbuf *copy;
         struct odp_msg *msg;
 
-        copy = ofpbuf_new(DPIF_RECV_MSG_PADDING + sizeof(struct odp_msg)
-                          + packet->size);
-        ofpbuf_reserve(copy, DPIF_RECV_MSG_PADDING);
-        msg = ofpbuf_put_uninit(copy, sizeof *msg);
+        msg = ofpbuf_push_uninit(packet, sizeof *msg);
         msg->type = _ODPL_ACTION_NR;
         msg->length = sizeof(struct odp_msg) + packet->size;
         msg->port = in_port;
         msg->reserved = 0;
         msg->arg = actions[0].controller.arg;
-        ofpbuf_put(copy, packet->data, packet->size);
 
-        send_packet_in(ofproto, copy);
+        send_packet_in(ofproto, packet);
 
-        actions++;
-        n_actions--;
-    }
+        return true;
+    } else {
+        int error;
 
-    return !n_actions || !dpif_execute(ofproto->dpif, in_port,
-                                       actions, n_actions, packet);
+        error = dpif_execute(ofproto->dpif, in_port,
+                             actions, n_actions, packet);
+        ofpbuf_delete(packet);
+        return !error;
+    }
 }
 
 /* Executes the actions indicated by 'rule' on 'packet', which is in flow
- * 'flow' and is considered to have arrived on ODP port 'in_port'.
+ * 'flow' and is considered to have arrived on ODP port 'in_port'.  'packet'
+ * must have at least sizeof(struct ofp_packet_in) bytes of headroom.
  *
  * The flow that 'packet' actually contains does not need to actually match
  * 'rule'; the actions in 'rule' will be applied to it either way.  Likewise,
@@ -1973,15 +1982,20 @@ execute_odp_actions(struct ofproto *ofproto, uint16_t in_port,
  * 'packet' using rule_make_actions().  If 'rule' is a wildcard rule, or if
  * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
  * function will compose a set of ODP actions based on 'rule''s OpenFlow
- * actions and apply them to 'packet'. */
+ * actions and apply them to 'packet'.
+ *
+ * Takes ownership of 'packet'. */
 static void
 rule_execute(struct ofproto *ofproto, struct rule *rule,
              struct ofpbuf *packet, const flow_t *flow)
 {
     const union odp_action *actions;
+    struct odp_flow_stats stats;
     size_t n_actions;
     struct odp_actions a;
 
+    assert(ofpbuf_headroom(packet) >= sizeof(struct ofp_packet_in));
+
     /* Grab or compose the ODP actions.
      *
      * The special case for an exact-match 'rule' where 'flow' is not the
@@ -1992,6 +2006,7 @@ rule_execute(struct ofproto *ofproto, struct rule *rule,
         struct rule *super = rule->super ? rule->super : rule;
         if (xlate_actions(super->actions, super->n_actions, flow, ofproto,
                           packet, &a, NULL, 0, NULL)) {
+            ofpbuf_delete(packet);
             return;
         }
         actions = a.actions;
@@ -2002,16 +2017,21 @@ rule_execute(struct ofproto *ofproto, struct rule *rule,
     }
 
     /* Execute the ODP actions. */
+    flow_extract_stats(flow, packet, &stats);
     if (execute_odp_actions(ofproto, flow->in_port,
                             actions, n_actions, packet)) {
-        struct odp_flow_stats stats;
-        flow_extract_stats(flow, packet, &stats);
         update_stats(ofproto, rule, &stats);
         rule->used = time_msec();
         netflow_flow_update_time(ofproto->netflow, &rule->nf_flow, rule->used);
     }
 }
 
+/* Inserts 'rule' into 'p''s flow table.
+ *
+ * If 'packet' is nonnull, takes ownership of 'packet', executes 'rule''s
+ * actions on it and credits the statistics for sending the packet to 'rule'.
+ * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of
+ * headroom. */
 static void
 rule_insert(struct ofproto *p, struct rule *rule, struct ofpbuf *packet,
             uint16_t in_port)
@@ -2327,7 +2347,6 @@ handle_features_request(struct ofproto *p, struct ofconn *ofconn,
 {
     struct ofp_switch_features *osf;
     struct ofpbuf *buf;
-    unsigned int port_no;
     struct ofport *port;
 
     osf = make_openflow_xid(sizeof *osf, OFPT_FEATURES_REPLY, oh->xid, &buf);
@@ -2349,7 +2368,7 @@ handle_features_request(struct ofproto *p, struct ofconn *ofconn,
                          (1u << OFPAT_SET_TP_DST) |
                          (1u << OFPAT_ENQUEUE));
 
-    PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
+    HMAP_FOR_EACH (port, hmap_node, &p->ports) {
         hton_ofp_phy_port(ofpbuf_put(buf, &port->opp, sizeof port->opp));
     }
 
@@ -2457,7 +2476,7 @@ static void do_xlate_actions(const union ofp_action *in, size_t n_in,
 static void
 add_output_action(struct action_xlate_ctx *ctx, uint16_t port)
 {
-    const struct ofport *ofport = port_array_get(&ctx->ofproto->ports, port);
+    const struct ofport *ofport = get_port(ctx->ofproto, port);
 
     if (ofport) {
         if (ofport->opp.config & OFPPC_NO_FWD) {
@@ -2687,7 +2706,7 @@ do_xlate_actions(const union ofp_action *in, size_t n_in,
     const union ofp_action *ia;
     const struct ofport *port;
 
-    port = port_array_get(&ctx->ofproto->ports, ctx->flow.in_port);
+    port = get_port(ctx->ofproto, ctx->flow.in_port);
     if (port && port->opp.config & (OFPPC_NO_RECV | OFPPC_NO_RECV_STP) &&
         port->opp.config & (eth_addr_equals(ctx->flow.dl_dst, eth_addr_stp)
                             ? OFPPC_NO_RECV_STP : OFPPC_NO_RECV)) {
@@ -2936,8 +2955,7 @@ handle_port_mod(struct ofproto *p, struct ofconn *ofconn,
     }
     opm = (struct ofp_port_mod *) oh;
 
-    port = port_array_get(&p->ports,
-                          ofp_port_to_odp_port(ntohs(opm->port_no)));
+    port = get_port(p, ofp_port_to_odp_port(ntohs(opm->port_no)));
     if (!port) {
         return ofp_mkerr(OFPET_PORT_MOD_FAILED, OFPPMFC_BAD_PORT);
     } else if (memcmp(port->opp.hw_addr, opm->hw_addr, OFP_ETH_ALEN)) {
@@ -3062,19 +3080,19 @@ handle_table_stats_request(struct ofproto *p, struct ofconn *ofconn,
 }
 
 static void
-append_port_stat(struct ofport *port, uint16_t port_no, struct ofconn *ofconn, 
+append_port_stat(struct ofport *port, struct ofconn *ofconn,
                  struct ofpbuf **msgp)
 {
     struct netdev_stats stats;
     struct ofp_port_stats *ops;
 
-    /* Intentionally ignore return value, since errors will set 
-     * 'stats' to all-1s, which is correct for OpenFlow, and 
+    /* Intentionally ignore return value, since errors will set
+     * 'stats' to all-1s, which is correct for OpenFlow, and
      * netdev_get_stats() will log errors. */
     netdev_get_stats(port->netdev, &stats);
 
     ops = append_stats_reply(sizeof *ops, ofconn, msgp);
-    ops->port_no = htons(odp_port_to_ofp_port(port_no));
+    ops->port_no = htons(port->opp.port_no);
     memset(ops->pad, 0, sizeof ops->pad);
     ops->rx_packets = htonll(stats.rx_packets);
     ops->tx_packets = htonll(stats.tx_packets);
@@ -3099,7 +3117,6 @@ handle_port_stats_request(struct ofproto *p, struct ofconn *ofconn,
     struct ofp_port_stats *ops;
     struct ofpbuf *msg;
     struct ofport *port;
-    unsigned int port_no;
 
     if (arg_size != sizeof *psr) {
         return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_BAD_LEN);
@@ -3108,14 +3125,13 @@ handle_port_stats_request(struct ofproto *p, struct ofconn *ofconn,
 
     msg = start_stats_reply(osr, sizeof *ops * 16);
     if (psr->port_no != htons(OFPP_NONE)) {
-        port = port_array_get(&p->ports, 
-                ofp_port_to_odp_port(ntohs(psr->port_no)));
+        port = get_port(p, ofp_port_to_odp_port(ntohs(psr->port_no)));
         if (port) {
-            append_port_stat(port, ntohs(psr->port_no), ofconn, &msg);
+            append_port_stat(port, ofconn, &msg);
         }
     } else {
-        PORT_ARRAY_FOR_EACH (port, &p->ports, port_no) {
-            append_port_stat(port, port_no, ofconn, &msg);
+        HMAP_FOR_EACH (port, hmap_node, &p->ports) {
+            append_port_stat(port, ofconn, &msg);
         }
     }
 
@@ -3159,7 +3175,7 @@ query_stats(struct ofproto *p, struct rule *rule,
     odp_flows = xzalloc(n_odp_flows * sizeof *odp_flows);
     if (rule->cr.wc.wildcards) {
         size_t i = 0;
-        LIST_FOR_EACH (subrule, struct rule, list, &rule->list) {
+        LIST_FOR_EACH (subrule, list, &rule->list) {
             odp_flows[i++].key = subrule->cr.flow;
             packet_count += subrule->packet_count;
             byte_count += subrule->byte_count;
@@ -3293,7 +3309,7 @@ flow_stats_ds_cb(struct cls_rule *rule_, void *cbdata_)
     ds_put_cstr(results, "\n");
 }
 
-/* Adds a pretty-printed description of all flows to 'results', including 
+/* Adds a pretty-printed description of all flows to 'results', including
  * those marked hidden by secchan (e.g., by in-band control). */
 void
 ofproto_get_all_flows(struct ofproto *p, struct ds *results)
@@ -3377,8 +3393,8 @@ handle_aggregate_stats_request(struct ofproto *p, struct ofconn *ofconn,
 
 struct queue_stats_cbdata {
     struct ofconn *ofconn;
+    struct ofport *ofport;
     struct ofpbuf *msg;
-    uint16_t port_no;
 };
 
 static void
@@ -3388,7 +3404,7 @@ put_queue_stats(struct queue_stats_cbdata *cbdata, uint32_t queue_id,
     struct ofp_queue_stats *reply;
 
     reply = append_stats_reply(sizeof *reply, cbdata->ofconn, &cbdata->msg);
-    reply->port_no = htons(cbdata->port_no);
+    reply->port_no = htons(cbdata->ofport->opp.port_no);
     memset(reply->pad, 0, sizeof reply->pad);
     reply->queue_id = htonl(queue_id);
     reply->tx_bytes = htonll(stats->tx_bytes);
@@ -3407,11 +3423,10 @@ handle_queue_stats_dump_cb(uint32_t queue_id,
 }
 
 static void
-handle_queue_stats_for_port(struct ofport *port, uint16_t port_no,
-                            uint32_t queue_id,
+handle_queue_stats_for_port(struct ofport *port, uint32_t queue_id,
                             struct queue_stats_cbdata *cbdata)
 {
-    cbdata->port_no = port_no;
+    cbdata->ofport = port;
     if (queue_id == OFPQ_ALL) {
         netdev_dump_queue_stats(port->netdev,
                                 handle_queue_stats_dump_cb, cbdata);
@@ -3447,13 +3462,13 @@ handle_queue_stats_request(struct ofproto *ofproto, struct ofconn *ofconn,
     port_no = ntohs(qsr->port_no);
     queue_id = ntohl(qsr->queue_id);
     if (port_no == OFPP_ALL) {
-        PORT_ARRAY_FOR_EACH (port, &ofproto->ports, port_no) {
-            handle_queue_stats_for_port(port, port_no, queue_id, &cbdata);
+        HMAP_FOR_EACH (port, hmap_node, &ofproto->ports) {
+            handle_queue_stats_for_port(port, queue_id, &cbdata);
         }
     } else if (port_no < ofproto->max_ports) {
-        port = port_array_get(&ofproto->ports, port_no);
+        port = get_port(ofproto, ofp_port_to_odp_port(port_no));
         if (port) {
-            handle_queue_stats_for_port(port, port_no, queue_id, &cbdata);
+            handle_queue_stats_for_port(port, queue_id, &cbdata);
         }
     } else {
         ofpbuf_delete(cbdata.msg);
@@ -3585,7 +3600,6 @@ add_flow(struct ofproto *p, struct ofconn *ofconn,
     }
 
     rule_insert(p, rule, packet, in_port);
-    ofpbuf_delete(packet);
     return error;
 }
 
@@ -3623,7 +3637,6 @@ send_buffered_packet(struct ofproto *ofproto, struct ofconn *ofconn,
 
     flow_extract(packet, 0, in_port, &flow);
     rule_execute(ofproto, rule, packet, &flow);
-    ofpbuf_delete(packet);
 
     return 0;
 }
@@ -3936,8 +3949,7 @@ handle_role_request(struct ofproto *ofproto,
     if (role == NX_ROLE_MASTER) {
         struct ofconn *other;
 
-        HMAP_FOR_EACH (other, struct ofconn, hmap_node,
-                       &ofproto->controllers) {
+        HMAP_FOR_EACH (other, hmap_node, &ofproto->controllers) {
             if (other->role == NX_ROLE_MASTER) {
                 other->role = NX_ROLE_SLAVE;
             }
@@ -4100,7 +4112,7 @@ handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
     rule = lookup_valid_rule(p, &flow);
     if (!rule) {
         /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
-        struct ofport *port = port_array_get(&p->ports, msg->port);
+        struct ofport *port = get_port(p, msg->port);
         if (port) {
             if (port->opp.config & OFPPC_NO_PACKET_IN) {
                 COVERAGE_INC(ofproto_no_packet_in);
@@ -4131,9 +4143,6 @@ handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
         }
     }
 
-    rule_execute(p, rule, &payload, &flow);
-    rule_reinstall(p, rule);
-
     if (rule->super && rule->super->cr.priority == FAIL_OPEN_PRIORITY) {
         /*
          * Extra-special case for fail-open mode.
@@ -4145,10 +4154,13 @@ handle_odp_miss_msg(struct ofproto *p, struct ofpbuf *packet)
          *
          * See the top-level comment in fail-open.c for more information.
          */
-        send_packet_in(p, packet);
-    } else {
-        ofpbuf_delete(packet);
+        send_packet_in(p, ofpbuf_clone_with_headroom(packet,
+                                                     DPIF_RECV_MSG_PADDING));
     }
+
+    ofpbuf_pull(packet, sizeof *msg);
+    rule_execute(p, rule, packet, &flow);
+    rule_reinstall(p, rule);
 }
 
 static void
@@ -4274,7 +4286,7 @@ send_flow_removed(struct ofproto *p, struct rule *rule,
      * requests that would not add new flows, so it is imperfect.) */
 
     prev = NULL;
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &p->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &p->all_conns) {
         if (rule->send_flow_removed && rconn_is_connected(ofconn->rconn)
             && ofconn_receives_async_msgs(ofconn)) {
             if (prev) {
@@ -4324,7 +4336,7 @@ expire_rule(struct cls_rule *cls_rule, void *p_)
      * due to an idle timeout. */
     if (rule->cr.wc.wildcards) {
         struct rule *subrule, *next;
-        LIST_FOR_EACH_SAFE (subrule, next, struct rule, list, &rule->list) {
+        LIST_FOR_EACH_SAFE (subrule, next, list, &rule->list) {
             rule_remove(p, subrule);
         }
     } else {
@@ -4537,7 +4549,7 @@ send_packet_in(struct ofproto *ofproto, struct ofpbuf *packet)
     max_len = do_convert_to_packet_in(packet);
 
     prev = NULL;
-    LIST_FOR_EACH (ofconn, struct ofconn, node, &ofproto->all_conns) {
+    LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) {
         if (ofconn_receives_async_msgs(ofconn)) {
             if (prev) {
                 schedule_packet_in(prev, packet, max_len, true);
@@ -4557,7 +4569,7 @@ pick_datapath_id(const struct ofproto *ofproto)
 {
     const struct ofport *port;
 
-    port = port_array_get(&ofproto->ports, ODPP_LOCAL);
+    port = get_port(ofproto, ODPP_LOCAL);
     if (port) {
         uint8_t ea[ETH_ADDR_LEN];
         int error;