/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#include <stdlib.h>
#include <time.h>
+#include "byte-order.h"
+#include "classifier.h"
#include "flow.h"
+#include "hmap.h"
#include "mac-learning.h"
#include "ofpbuf.h"
+#include "ofp-actions.h"
+#include "ofp-errors.h"
+#include "ofp-msgs.h"
+#include "ofp-parse.h"
#include "ofp-print.h"
+#include "ofp-util.h"
#include "openflow/openflow.h"
#include "poll-loop.h"
-#include "queue.h"
#include "rconn.h"
-#include "stp.h"
+#include "shash.h"
+#include "simap.h"
#include "timeval.h"
#include "vconn.h"
-#include "xtoxll.h"
-
-#define THIS_MODULE VLM_learning_switch
#include "vlog.h"
-enum port_state {
- P_DISABLED = 1 << 0,
- P_LISTENING = 1 << 1,
- P_LEARNING = 1 << 2,
- P_FORWARDING = 1 << 3,
- P_BLOCKING = 1 << 4
+VLOG_DEFINE_THIS_MODULE(learning_switch);
+
+struct lswitch_port {
+ struct hmap_node hmap_node; /* Hash node for port number. */
+ ofp_port_t port_no; /* OpenFlow port number. */
+ uint32_t queue_id; /* OpenFlow queue number. */
+};
+
+enum lswitch_state {
+ S_CONNECTING, /* Waiting for connection to complete. */
+ S_FEATURES_REPLY, /* Waiting for features reply. */
+ S_SWITCHING, /* Switching flows. */
};
struct lswitch {
+ struct rconn *rconn;
+ enum lswitch_state state;
+
/* If nonnegative, the switch sets up flows that expire after the given
* number of seconds (or never expire, if the value is OFP_FLOW_PERMANENT).
* Otherwise, the switch processes every packet. */
int max_idle;
+ enum ofputil_protocol protocol;
unsigned long long int datapath_id;
- uint32_t capabilities;
- time_t last_features_request;
struct mac_learning *ml; /* NULL to act as hub instead of switch. */
- bool exact_flows; /* Use exact-match flows? */
+ struct flow_wildcards wc; /* Wildcards to apply to flows. */
bool action_normal; /* Use OFPP_NORMAL? */
+ /* Queue distribution. */
+ uint32_t default_queue; /* Default OpenFlow queue, or UINT32_MAX. */
+ struct hmap queue_numbers; /* Map from port number to lswitch_port. */
+ struct shash queue_names; /* Map from port name to lswitch_port. */
+
/* Number of outgoing queued packets on the rconn. */
struct rconn_packet_counter *queued;
- /* Spanning tree protocol implementation.
- *
- * We implement STP states by, whenever a port's STP state changes,
- * querying all the flows on the switch and then deleting any of them that
- * are inappropriate for a port's STP state. */
- long long int next_query; /* Next time at which to query all flows. */
- long long int last_query; /* Last time we sent a query. */
- long long int last_reply; /* Last time we received a query reply. */
- unsigned int port_states[STP_MAX_PORTS];
- uint32_t query_xid; /* XID used for query. */
- int n_flows, n_no_recv, n_no_send;
+ /* If true, do not reply to any messages from the switch (for debugging
+ * fail-open mode). */
+ bool mute;
+
+ /* Optional "flow mod" requests to send to the switch at connection time,
+ * to set up the flow table. */
+ const struct ofputil_flow_mod *default_flows;
+ size_t n_default_flows;
+ enum ofputil_protocol usable_protocols;
};
/* The log messages here could actually be useful in debugging, so keep the
* rate limit relatively high. */
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30, 300);
-static void queue_tx(struct lswitch *, struct rconn *, struct ofpbuf *);
-static void send_features_request(struct lswitch *, struct rconn *);
-static void schedule_query(struct lswitch *, long long int delay);
-static bool may_learn(const struct lswitch *, uint16_t port_no);
-static bool may_recv(const struct lswitch *, uint16_t port_no,
- bool any_actions);
-static bool may_send(const struct lswitch *, uint16_t port_no);
-
-typedef void packet_handler_func(struct lswitch *, struct rconn *, void *);
-static packet_handler_func process_switch_features;
-static packet_handler_func process_packet_in;
-static packet_handler_func process_echo_request;
-static packet_handler_func process_port_status;
-static packet_handler_func process_phy_port;
-static packet_handler_func process_stats_reply;
-
-/* Creates and returns a new learning switch.
- *
- * If 'learn_macs' is true, the new switch will learn the ports on which MAC
- * addresses appear. Otherwise, the new switch will flood all packets.
- *
- * If 'max_idle' is nonnegative, the new switch will set up flows that expire
- * after the given number of seconds (or never expire, if 'max_idle' is
- * OFP_FLOW_PERMANENT). Otherwise, the new switch will process every packet.
+static void queue_tx(struct lswitch *, struct ofpbuf *);
+static void send_features_request(struct lswitch *);
+
+static void lswitch_process_packet(struct lswitch *, const struct ofpbuf *);
+static enum ofperr process_switch_features(struct lswitch *,
+ struct ofp_header *);
+static void process_packet_in(struct lswitch *, const struct ofp_header *);
+static void process_echo_request(struct lswitch *, const struct ofp_header *);
+
+/* Creates and returns a new learning switch whose configuration is given by
+ * 'cfg'.
*
* 'rconn' is used to send out an OpenFlow features request. */
struct lswitch *
-lswitch_create(struct rconn *rconn, bool learn_macs,
- bool exact_flows, int max_idle, bool action_normal)
+lswitch_create(struct rconn *rconn, const struct lswitch_config *cfg)
{
struct lswitch *sw;
- size_t i;
+ uint32_t ofpfw;
- sw = xcalloc(1, sizeof *sw);
- sw->max_idle = max_idle;
+ sw = xzalloc(sizeof *sw);
+ sw->rconn = rconn;
+ sw->state = S_CONNECTING;
+ sw->max_idle = cfg->max_idle;
sw->datapath_id = 0;
- sw->last_features_request = time_now() - 1;
- sw->ml = learn_macs ? mac_learning_create() : NULL;
- sw->action_normal = action_normal;
- sw->exact_flows = exact_flows;
- sw->queued = rconn_packet_counter_create();
- sw->next_query = LLONG_MIN;
- sw->last_query = LLONG_MIN;
- sw->last_reply = LLONG_MIN;
- for (i = 0; i < STP_MAX_PORTS; i++) {
- sw->port_states[i] = P_DISABLED;
+ sw->ml = (cfg->mode == LSW_LEARN
+ ? mac_learning_create(MAC_ENTRY_DEFAULT_IDLE_TIME)
+ : NULL);
+ sw->action_normal = cfg->mode == LSW_NORMAL;
+
+ switch (cfg->wildcards) {
+ case 0:
+ ofpfw = 0;
+ break;
+
+ case UINT32_MAX:
+ /* Try to wildcard as many fields as possible, but we cannot
+ * wildcard all fields. We need in_port to detect moves. We need
+ * Ethernet source and dest and VLAN VID to do L2 learning. */
+ ofpfw = (OFPFW10_DL_TYPE | OFPFW10_DL_VLAN_PCP
+ | OFPFW10_NW_SRC_ALL | OFPFW10_NW_DST_ALL
+ | OFPFW10_NW_TOS | OFPFW10_NW_PROTO
+ | OFPFW10_TP_SRC | OFPFW10_TP_DST);
+ break;
+
+ default:
+ ofpfw = cfg->wildcards;
+ break;
}
- send_features_request(sw, rconn);
+ ofputil_wildcard_from_ofpfw10(ofpfw, &sw->wc);
+
+ sw->default_queue = cfg->default_queue;
+ hmap_init(&sw->queue_numbers);
+ shash_init(&sw->queue_names);
+ if (cfg->port_queues) {
+ struct simap_node *node;
+
+ SIMAP_FOR_EACH (node, cfg->port_queues) {
+ struct lswitch_port *port = xmalloc(sizeof *port);
+ hmap_node_nullify(&port->hmap_node);
+ port->queue_id = node->data;
+ shash_add(&sw->queue_names, node->name, port);
+ }
+ }
+
+ sw->default_flows = cfg->default_flows;
+ sw->n_default_flows = cfg->n_default_flows;
+ sw->usable_protocols = cfg->usable_protocols;
+
+ sw->queued = rconn_packet_counter_create();
+
return sw;
}
+static void
+lswitch_handshake(struct lswitch *sw)
+{
+ enum ofputil_protocol protocol;
+
+ send_features_request(sw);
+
+ protocol = ofputil_protocol_from_ofp_version(rconn_get_version(sw->rconn));
+ if (sw->default_flows) {
+ struct ofpbuf *msg = NULL;
+ int error = 0;
+ size_t i;
+
+ /* If the initial protocol isn't good enough for default_flows, then
+ * pick one that will work and encode messages to set up that
+ * protocol.
+ *
+ * This could be improved by actually negotiating a mutually acceptable
+ * flow format with the switch, but that would require an asynchronous
+ * state machine. This version ought to work fine in practice. */
+ if (!(protocol & sw->usable_protocols)) {
+ enum ofputil_protocol want = rightmost_1bit(sw->usable_protocols);
+ while (!error) {
+ msg = ofputil_encode_set_protocol(protocol, want, &protocol);
+ if (!msg) {
+ break;
+ }
+ error = rconn_send(sw->rconn, msg, NULL);
+ }
+ }
+ if (protocol & sw->usable_protocols) {
+ for (i = 0; !error && i < sw->n_default_flows; i++) {
+ msg = ofputil_encode_flow_mod(&sw->default_flows[i], protocol);
+ error = rconn_send(sw->rconn, msg, NULL);
+ }
+
+ if (error) {
+ VLOG_INFO_RL(&rl, "%s: failed to queue default flows (%s)",
+ rconn_get_name(sw->rconn), ovs_strerror(error));
+ }
+ } else {
+ VLOG_INFO_RL(&rl, "%s: failed to set usable protocol",
+ rconn_get_name(sw->rconn));
+ }
+ }
+ sw->protocol = protocol;
+}
+
+bool
+lswitch_is_alive(const struct lswitch *sw)
+{
+ return rconn_is_alive(sw->rconn);
+}
+
/* Destroys 'sw'. */
void
lswitch_destroy(struct lswitch *sw)
{
if (sw) {
- mac_learning_destroy(sw->ml);
+ struct lswitch_port *node, *next;
+
+ rconn_destroy(sw->rconn);
+ HMAP_FOR_EACH_SAFE (node, next, hmap_node, &sw->queue_numbers) {
+ hmap_remove(&sw->queue_numbers, &node->hmap_node);
+ free(node);
+ }
+ shash_destroy(&sw->queue_names);
+ mac_learning_unref(sw->ml);
rconn_packet_counter_destroy(sw->queued);
free(sw);
}
/* Takes care of necessary 'sw' activity, except for receiving packets (which
* the caller must do). */
void
-lswitch_run(struct lswitch *sw, struct rconn *rconn)
+lswitch_run(struct lswitch *sw)
{
- long long int now = time_msec();
+ int i;
if (sw->ml) {
- mac_learning_run(sw->ml, NULL);
+ ovs_rwlock_wrlock(&sw->ml->rwlock);
+ mac_learning_run(sw->ml);
+ ovs_rwlock_unlock(&sw->ml->rwlock);
}
- /* If we're waiting for more replies, keeping waiting for up to 10 s. */
- if (sw->last_reply != LLONG_MIN) {
- if (now - sw->last_reply > 10000) {
- VLOG_ERR_RL(&rl, "%012llx: No more flow stat replies last 10 s",
- sw->datapath_id);
- sw->last_reply = LLONG_MIN;
- sw->last_query = LLONG_MIN;
- schedule_query(sw, 0);
- } else {
- return;
- }
- }
+ rconn_run(sw->rconn);
- /* If we're waiting for any reply at all, keep waiting for up to 10 s. */
- if (sw->last_query != LLONG_MIN) {
- if (now - sw->last_query > 10000) {
- VLOG_ERR_RL(&rl, "%012llx: No flow stat replies in last 10 s",
- sw->datapath_id);
- sw->last_query = LLONG_MIN;
- schedule_query(sw, 0);
- } else {
- return;
+ if (sw->state == S_CONNECTING) {
+ if (rconn_get_version(sw->rconn) != -1) {
+ lswitch_handshake(sw);
+ sw->state = S_FEATURES_REPLY;
}
+ return;
}
- /* If it's time to send another query, do so. */
- if (sw->next_query != LLONG_MIN && now >= sw->next_query) {
- sw->next_query = LLONG_MIN;
- if (!rconn_is_connected(rconn)) {
- schedule_query(sw, 1000);
- } else {
- struct ofp_stats_request *osr;
- struct ofp_flow_stats_request *ofsr;
- struct ofpbuf *b;
- int error;
-
- VLOG_DBG("%012llx: Sending flow stats request to implement STP",
- sw->datapath_id);
-
- sw->last_query = now;
- sw->query_xid = random_uint32();
- sw->n_flows = 0;
- sw->n_no_recv = 0;
- sw->n_no_send = 0;
- osr = make_openflow_xid(sizeof *osr + sizeof *ofsr,
- OFPT_STATS_REQUEST, sw->query_xid, &b);
- osr->type = htons(OFPST_FLOW);
- osr->flags = htons(0);
- ofsr = (struct ofp_flow_stats_request *) osr->body;
- ofsr->match.wildcards = htonl(OFPFW_ALL);
- ofsr->table_id = 0xff;
- ofsr->out_port = htons(OFPP_NONE);
-
- error = rconn_send(rconn, b, NULL);
- if (error) {
- VLOG_WARN_RL(&rl, "%012llx: sending flow stats request "
- "failed: %s", sw->datapath_id, strerror(error));
- ofpbuf_delete(b);
- schedule_query(sw, 1000);
- }
+ for (i = 0; i < 50; i++) {
+ struct ofpbuf *msg;
+
+ msg = rconn_recv(sw->rconn);
+ if (!msg) {
+ break;
}
- }
-}
-static void
-wait_timeout(long long int started)
-{
- long long int now = time_msec();
- long long int timeout = 10000 - (now - started);
- if (timeout <= 0) {
- poll_immediate_wake();
- } else {
- poll_timer_wait(timeout);
+ if (!sw->mute) {
+ lswitch_process_packet(sw, msg);
+ }
+ ofpbuf_delete(msg);
}
}
lswitch_wait(struct lswitch *sw)
{
if (sw->ml) {
+ ovs_rwlock_rdlock(&sw->ml->rwlock);
mac_learning_wait(sw->ml);
+ ovs_rwlock_unlock(&sw->ml->rwlock);
}
-
- if (sw->last_reply != LLONG_MIN) {
- wait_timeout(sw->last_reply);
- } else if (sw->last_query != LLONG_MIN) {
- wait_timeout(sw->last_query);
- }
+ rconn_run_wait(sw->rconn);
+ rconn_recv_wait(sw->rconn);
}
/* Processes 'msg', which should be an OpenFlow received on 'rconn', according
* to the learning switch state in 'sw'. The most likely result of processing
* is that flow-setup and packet-out OpenFlow messages will be sent out on
* 'rconn'. */
-void
-lswitch_process_packet(struct lswitch *sw, struct rconn *rconn,
- const struct ofpbuf *msg)
+static void
+lswitch_process_packet(struct lswitch *sw, const struct ofpbuf *msg)
{
- struct processor {
- uint8_t type;
- size_t min_size;
- packet_handler_func *handler;
- };
- static const struct processor processors[] = {
- {
- OFPT_ECHO_REQUEST,
- sizeof(struct ofp_header),
- process_echo_request
- },
- {
- OFPT_FEATURES_REPLY,
- sizeof(struct ofp_switch_features),
- process_switch_features
- },
- {
- OFPT_PACKET_IN,
- offsetof(struct ofp_packet_in, data),
- process_packet_in
- },
- {
- OFPT_PORT_STATUS,
- sizeof(struct ofp_port_status),
- process_port_status
- },
- {
- OFPT_STATS_REPLY,
- offsetof(struct ofp_stats_reply, body),
- process_stats_reply
- },
- {
- OFPT_FLOW_EXPIRED,
- sizeof(struct ofp_flow_expired),
- NULL
- },
- };
- const size_t n_processors = ARRAY_SIZE(processors);
- const struct processor *p;
- struct ofp_header *oh;
-
- oh = msg->data;
- if (sw->datapath_id == 0
- && oh->type != OFPT_ECHO_REQUEST
- && oh->type != OFPT_FEATURES_REPLY) {
- send_features_request(sw, rconn);
+ enum ofptype type;
+ struct ofpbuf b;
+
+ b = *msg;
+ if (ofptype_pull(&type, &b)) {
return;
}
- for (p = processors; p < &processors[n_processors]; p++) {
- if (oh->type == p->type) {
- if (msg->size < p->min_size) {
- VLOG_WARN_RL(&rl, "%012llx: %s: too short (%zu bytes) for "
- "type %"PRIu8" (min %zu)", sw->datapath_id,
- rconn_get_name(rconn), msg->size, oh->type,
- p->min_size);
- return;
- }
- if (p->handler) {
- (p->handler)(sw, rconn, msg->data);
+ if (sw->state == S_FEATURES_REPLY
+ && type != OFPTYPE_ECHO_REQUEST
+ && type != OFPTYPE_FEATURES_REPLY) {
+ return;
+ }
+
+ switch (type) {
+ case OFPTYPE_ECHO_REQUEST:
+ process_echo_request(sw, ofpbuf_data(msg));
+ break;
+
+ case OFPTYPE_FEATURES_REPLY:
+ if (sw->state == S_FEATURES_REPLY) {
+ if (!process_switch_features(sw, ofpbuf_data(msg))) {
+ sw->state = S_SWITCHING;
+ } else {
+ rconn_disconnect(sw->rconn);
}
- return;
}
- }
- if (VLOG_IS_DBG_ENABLED()) {
- char *p = ofp_to_string(msg->data, msg->size, 2);
- VLOG_DBG_RL(&rl, "%012llx: OpenFlow packet ignored: %s",
- sw->datapath_id, p);
- free(p);
+ break;
+
+ case OFPTYPE_PACKET_IN:
+ process_packet_in(sw, ofpbuf_data(msg));
+ break;
+
+ case OFPTYPE_FLOW_REMOVED:
+ /* Nothing to do. */
+ break;
+
+ case OFPTYPE_HELLO:
+ case OFPTYPE_ERROR:
+ case OFPTYPE_ECHO_REPLY:
+ case OFPTYPE_FEATURES_REQUEST:
+ case OFPTYPE_GET_CONFIG_REQUEST:
+ case OFPTYPE_GET_CONFIG_REPLY:
+ case OFPTYPE_SET_CONFIG:
+ case OFPTYPE_PORT_STATUS:
+ case OFPTYPE_PACKET_OUT:
+ case OFPTYPE_FLOW_MOD:
+ case OFPTYPE_GROUP_MOD:
+ case OFPTYPE_PORT_MOD:
+ case OFPTYPE_TABLE_MOD:
+ case OFPTYPE_BARRIER_REQUEST:
+ case OFPTYPE_BARRIER_REPLY:
+ case OFPTYPE_QUEUE_GET_CONFIG_REQUEST:
+ case OFPTYPE_QUEUE_GET_CONFIG_REPLY:
+ case OFPTYPE_DESC_STATS_REQUEST:
+ case OFPTYPE_DESC_STATS_REPLY:
+ case OFPTYPE_FLOW_STATS_REQUEST:
+ case OFPTYPE_FLOW_STATS_REPLY:
+ case OFPTYPE_AGGREGATE_STATS_REQUEST:
+ case OFPTYPE_AGGREGATE_STATS_REPLY:
+ case OFPTYPE_TABLE_STATS_REQUEST:
+ case OFPTYPE_TABLE_STATS_REPLY:
+ case OFPTYPE_PORT_STATS_REQUEST:
+ case OFPTYPE_PORT_STATS_REPLY:
+ case OFPTYPE_QUEUE_STATS_REQUEST:
+ case OFPTYPE_QUEUE_STATS_REPLY:
+ case OFPTYPE_PORT_DESC_STATS_REQUEST:
+ case OFPTYPE_PORT_DESC_STATS_REPLY:
+ case OFPTYPE_ROLE_REQUEST:
+ case OFPTYPE_ROLE_REPLY:
+ case OFPTYPE_ROLE_STATUS:
+ case OFPTYPE_SET_FLOW_FORMAT:
+ case OFPTYPE_FLOW_MOD_TABLE_ID:
+ case OFPTYPE_SET_PACKET_IN_FORMAT:
+ case OFPTYPE_FLOW_AGE:
+ case OFPTYPE_SET_CONTROLLER_ID:
+ case OFPTYPE_FLOW_MONITOR_STATS_REQUEST:
+ case OFPTYPE_FLOW_MONITOR_STATS_REPLY:
+ case OFPTYPE_FLOW_MONITOR_CANCEL:
+ case OFPTYPE_FLOW_MONITOR_PAUSED:
+ case OFPTYPE_FLOW_MONITOR_RESUMED:
+ case OFPTYPE_GET_ASYNC_REQUEST:
+ case OFPTYPE_GET_ASYNC_REPLY:
+ case OFPTYPE_SET_ASYNC_CONFIG:
+ case OFPTYPE_METER_MOD:
+ case OFPTYPE_GROUP_STATS_REQUEST:
+ case OFPTYPE_GROUP_STATS_REPLY:
+ case OFPTYPE_GROUP_DESC_STATS_REQUEST:
+ case OFPTYPE_GROUP_DESC_STATS_REPLY:
+ case OFPTYPE_GROUP_FEATURES_STATS_REQUEST:
+ case OFPTYPE_GROUP_FEATURES_STATS_REPLY:
+ case OFPTYPE_METER_STATS_REQUEST:
+ case OFPTYPE_METER_STATS_REPLY:
+ case OFPTYPE_METER_CONFIG_STATS_REQUEST:
+ case OFPTYPE_METER_CONFIG_STATS_REPLY:
+ case OFPTYPE_METER_FEATURES_STATS_REQUEST:
+ case OFPTYPE_METER_FEATURES_STATS_REPLY:
+ case OFPTYPE_TABLE_FEATURES_STATS_REQUEST:
+ case OFPTYPE_TABLE_FEATURES_STATS_REPLY:
+ case OFPTYPE_BUNDLE_CONTROL:
+ case OFPTYPE_BUNDLE_ADD_MESSAGE:
+ default:
+ if (VLOG_IS_DBG_ENABLED()) {
+ char *s = ofp_to_string(ofpbuf_data(msg), ofpbuf_size(msg), 2);
+ VLOG_DBG_RL(&rl, "%016llx: OpenFlow packet ignored: %s",
+ sw->datapath_id, s);
+ free(s);
+ }
}
}
\f
static void
-send_features_request(struct lswitch *sw, struct rconn *rconn)
+send_features_request(struct lswitch *sw)
{
- time_t now = time_now();
- if (now >= sw->last_features_request + 1) {
- struct ofpbuf *b;
- struct ofp_switch_config *osc;
-
- /* Send OFPT_FEATURES_REQUEST. */
- make_openflow(sizeof(struct ofp_header), OFPT_FEATURES_REQUEST, &b);
- queue_tx(sw, rconn, b);
-
- /* Send OFPT_SET_CONFIG. */
- osc = make_openflow(sizeof *osc, OFPT_SET_CONFIG, &b);
- osc->flags = htons(OFPC_SEND_FLOW_EXP);
- osc->miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
- queue_tx(sw, rconn, b);
-
- sw->last_features_request = now;
- }
+ struct ofpbuf *b;
+ struct ofp_switch_config *osc;
+ int ofp_version = rconn_get_version(sw->rconn);
+
+ ovs_assert(ofp_version > 0 && ofp_version < 0xff);
+
+ /* Send OFPT_FEATURES_REQUEST. */
+ b = ofpraw_alloc(OFPRAW_OFPT_FEATURES_REQUEST, ofp_version, 0);
+ queue_tx(sw, b);
+
+ /* Send OFPT_SET_CONFIG. */
+ b = ofpraw_alloc(OFPRAW_OFPT_SET_CONFIG, ofp_version, sizeof *osc);
+ osc = ofpbuf_put_zeros(b, sizeof *osc);
+ osc->miss_send_len = htons(OFP_DEFAULT_MISS_SEND_LEN);
+ queue_tx(sw, b);
}
static void
-queue_tx(struct lswitch *sw, struct rconn *rconn, struct ofpbuf *b)
+queue_tx(struct lswitch *sw, struct ofpbuf *b)
{
- int retval = rconn_send_with_limit(rconn, b, sw->queued, 10);
+ int retval = rconn_send_with_limit(sw->rconn, b, sw->queued, 10);
if (retval && retval != ENOTCONN) {
if (retval == EAGAIN) {
- VLOG_INFO_RL(&rl, "%012llx: %s: tx queue overflow",
- sw->datapath_id, rconn_get_name(rconn));
+ VLOG_INFO_RL(&rl, "%016llx: %s: tx queue overflow",
+ sw->datapath_id, rconn_get_name(sw->rconn));
} else {
- VLOG_WARN_RL(&rl, "%012llx: %s: send: %s",
- sw->datapath_id, rconn_get_name(rconn),
- strerror(retval));
+ VLOG_WARN_RL(&rl, "%016llx: %s: send: %s",
+ sw->datapath_id, rconn_get_name(sw->rconn),
+ ovs_strerror(retval));
}
}
}
-static void
-schedule_query(struct lswitch *sw, long long int delay)
+static enum ofperr
+process_switch_features(struct lswitch *sw, struct ofp_header *oh)
{
- long long int now = time_msec();
- if (sw->next_query == LLONG_MIN || sw->next_query > now + delay) {
- sw->next_query = now + delay;
+ struct ofputil_switch_features features;
+ struct ofputil_phy_port port;
+ enum ofperr error;
+ struct ofpbuf b;
+
+ error = ofputil_decode_switch_features(oh, &features, &b);
+ if (error) {
+ VLOG_ERR("received invalid switch feature reply (%s)",
+ ofperr_to_string(error));
+ return error;
}
-}
-static void
-process_switch_features(struct lswitch *sw, struct rconn *rconn, void *osf_)
-{
- struct ofp_switch_features *osf = osf_;
- size_t n_ports = ((ntohs(osf->header.length)
- - offsetof(struct ofp_switch_features, ports))
- / sizeof *osf->ports);
- size_t i;
-
- sw->datapath_id = ntohll(osf->datapath_id);
- sw->capabilities = ntohl(osf->capabilities);
- for (i = 0; i < n_ports; i++) {
- process_phy_port(sw, rconn, &osf->ports[i]);
- }
- if (sw->capabilities & OFPC_STP) {
- schedule_query(sw, 1000);
+ sw->datapath_id = features.datapath_id;
+
+ while (!ofputil_pull_phy_port(oh->version, &b, &port)) {
+ struct lswitch_port *lp = shash_find_data(&sw->queue_names, port.name);
+ if (lp && hmap_node_is_null(&lp->hmap_node)) {
+ lp->port_no = port.port_no;
+ hmap_insert(&sw->queue_numbers, &lp->hmap_node,
+ hash_ofp_port(lp->port_no));
+ }
}
+ return 0;
}
-static void
-process_packet_in(struct lswitch *sw, struct rconn *rconn, void *opi_)
+static ofp_port_t
+lswitch_choose_destination(struct lswitch *sw, const struct flow *flow)
{
- struct ofp_packet_in *opi = opi_;
- uint16_t in_port = ntohs(opi->in_port);
- uint16_t out_port = OFPP_FLOOD;
-
- size_t pkt_ofs, pkt_len;
- struct ofpbuf pkt;
- flow_t flow;
+ ofp_port_t out_port;
- /* Extract flow data from 'opi' into 'flow'. */
- pkt_ofs = offsetof(struct ofp_packet_in, data);
- pkt_len = ntohs(opi->header.length) - pkt_ofs;
- pkt.data = opi->data;
- pkt.size = pkt_len;
- flow_extract(&pkt, in_port, &flow);
-
- if (may_learn(sw, in_port) && sw->ml) {
- if (mac_learning_learn(sw->ml, flow.dl_src, 0, in_port)) {
- VLOG_DBG_RL(&rl, "%012llx: learned that "ETH_ADDR_FMT" is on "
- "port %"PRIu16, sw->datapath_id,
- ETH_ADDR_ARGS(flow.dl_src), in_port);
+ /* Learn the source MAC. */
+ if (sw->ml) {
+ ovs_rwlock_wrlock(&sw->ml->rwlock);
+ if (mac_learning_may_learn(sw->ml, flow->dl_src, 0)) {
+ struct mac_entry *mac = mac_learning_insert(sw->ml, flow->dl_src,
+ 0);
+ if (mac->port.ofp_port != flow->in_port.ofp_port) {
+ VLOG_DBG_RL(&rl, "%016llx: learned that "ETH_ADDR_FMT" is on "
+ "port %"PRIu16, sw->datapath_id,
+ ETH_ADDR_ARGS(flow->dl_src),
+ flow->in_port.ofp_port);
+
+ mac->port.ofp_port = flow->in_port.ofp_port;
+ mac_learning_changed(sw->ml);
+ }
}
+ ovs_rwlock_unlock(&sw->ml->rwlock);
}
- if (eth_addr_is_reserved(flow.dl_src)) {
- goto drop_it;
- }
-
- if (!may_recv(sw, in_port, false)) {
- /* STP prevents receiving anything on this port. */
- goto drop_it;
+ /* Drop frames for reserved multicast addresses. */
+ if (eth_addr_is_reserved(flow->dl_dst)) {
+ return OFPP_NONE;
}
+ out_port = OFPP_FLOOD;
if (sw->ml) {
- int learned_port = mac_learning_lookup(sw->ml, flow.dl_dst, 0);
- if (learned_port >= 0 && may_send(sw, learned_port)) {
- out_port = learned_port;
- }
- }
-
- if (in_port == out_port) {
- /* Don't send out packets on their input ports. */
- goto drop_it;
- } else if (sw->max_idle >= 0 && (!sw->ml || out_port != OFPP_FLOOD)) {
- struct ofpbuf *buffer;
- struct ofp_flow_mod *ofm;
- uint32_t wildcards;
-
- /* Check if we need to wildcard the flows. */
- if (!sw->exact_flows) {
- /* We can not wildcard all fields.
- * We need in_port to detect moves.
- * We need both SA and DA to do learning. */
- wildcards = (OFPFW_DL_TYPE | OFPFW_NW_SRC_MASK | OFPFW_NW_DST_MASK
- | OFPFW_NW_PROTO | OFPFW_TP_SRC | OFPFW_TP_DST);
- } else {
- /* Exact match */
- wildcards = 0;
- }
-
- /* Check if we need to use "NORMAL" action. */
- if (sw->action_normal && out_port != OFPP_FLOOD) {
- out_port = OFPP_NORMAL;
- }
-
- /* The output port is known, or we always flood everything, so add a
- * new flow. */
- buffer = make_add_simple_flow(&flow, ntohl(opi->buffer_id),
- out_port, sw->max_idle);
- ofm = buffer->data;
- ofm->match.wildcards = htonl(wildcards);
- queue_tx(sw, rconn, buffer);
-
- /* If the switch didn't buffer the packet, we need to send a copy. */
- if (ntohl(opi->buffer_id) == UINT32_MAX) {
- queue_tx(sw, rconn,
- make_unbuffered_packet_out(&pkt, in_port, out_port));
- }
- } else {
- struct ofpbuf *b;
-
- /* Check if we need to use "NORMAL" action. */
- if (sw->action_normal && out_port != OFPP_FLOOD) {
- out_port = OFPP_NORMAL;
- }
-
- /* We don't know that MAC, or we don't set up flows. Send along the
- * packet without setting up a flow. */
- if (ntohl(opi->buffer_id) == UINT32_MAX) {
- b = make_unbuffered_packet_out(&pkt, in_port, out_port);
- } else {
- b = make_buffered_packet_out(ntohl(opi->buffer_id),
- in_port, out_port);
+ struct mac_entry *mac;
+
+ ovs_rwlock_rdlock(&sw->ml->rwlock);
+ mac = mac_learning_lookup(sw->ml, flow->dl_dst, 0);
+ if (mac) {
+ out_port = mac->port.ofp_port;
+ if (out_port == flow->in_port.ofp_port) {
+ /* Don't send a packet back out its input port. */
+ ovs_rwlock_unlock(&sw->ml->rwlock);
+ return OFPP_NONE;
+ }
}
- queue_tx(sw, rconn, b);
+ ovs_rwlock_unlock(&sw->ml->rwlock);
}
- return;
-drop_it:
- if (sw->max_idle >= 0) {
- /* Set up a flow to drop packets. */
- queue_tx(sw, rconn, make_add_flow(&flow, ntohl(opi->buffer_id),
- sw->max_idle, 0));
- } else {
- /* Just drop the packet, since we don't set up flows at all.
- * XXX we should send a packet_out with no actions if buffer_id !=
- * UINT32_MAX, to avoid clogging the kernel buffers. */
+ /* Check if we need to use "NORMAL" action. */
+ if (sw->action_normal && out_port != OFPP_FLOOD) {
+ return OFPP_NORMAL;
}
- return;
-}
-static void
-process_echo_request(struct lswitch *sw, struct rconn *rconn, void *rq_)
-{
- struct ofp_header *rq = rq_;
- queue_tx(sw, rconn, make_echo_reply(rq));
+ return out_port;
}
-static void
-process_port_status(struct lswitch *sw, struct rconn *rconn, void *ops_)
+static uint32_t
+get_queue_id(const struct lswitch *sw, ofp_port_t in_port)
{
- struct ofp_port_status *ops = ops_;
- process_phy_port(sw, rconn, &ops->desc);
-}
+ const struct lswitch_port *port;
-static void
-process_phy_port(struct lswitch *sw, struct rconn *rconn UNUSED, void *opp_)
-{
- const struct ofp_phy_port *opp = opp_;
- uint16_t port_no = ntohs(opp->port_no);
- if (sw->capabilities & OFPC_STP && port_no < STP_MAX_PORTS) {
- uint32_t config = ntohl(opp->config);
- uint32_t state = ntohl(opp->state);
- unsigned int *port_state = &sw->port_states[port_no];
- unsigned int new_port_state;
-
- if (!(config & (OFPPC_NO_STP | OFPPC_PORT_DOWN))
- && !(state & OFPPS_LINK_DOWN))
- {
- switch (state & OFPPS_STP_MASK) {
- case OFPPS_STP_LISTEN:
- new_port_state = P_LISTENING;
- break;
- case OFPPS_STP_LEARN:
- new_port_state = P_LEARNING;
- break;
- case OFPPS_STP_FORWARD:
- new_port_state = P_FORWARDING;
- break;
- case OFPPS_STP_BLOCK:
- new_port_state = P_BLOCKING;
- break;
- default:
- new_port_state = P_DISABLED;
- break;
- }
- } else {
- new_port_state = P_FORWARDING;
- }
- if (*port_state != new_port_state) {
- *port_state = new_port_state;
- schedule_query(sw, 1000);
+ HMAP_FOR_EACH_WITH_HASH (port, hmap_node, hash_ofp_port(in_port),
+ &sw->queue_numbers) {
+ if (port->port_no == in_port) {
+ return port->queue_id;
}
}
-}
-static unsigned int
-get_port_state(const struct lswitch *sw, uint16_t port_no)
-{
- return (port_no >= STP_MAX_PORTS || !(sw->capabilities & OFPC_STP)
- ? P_FORWARDING
- : sw->port_states[port_no]);
+ return sw->default_queue;
}
-static bool
-may_learn(const struct lswitch *sw, uint16_t port_no)
+static void
+process_packet_in(struct lswitch *sw, const struct ofp_header *oh)
{
- return get_port_state(sw, port_no) & (P_LEARNING | P_FORWARDING);
-}
+ struct ofputil_packet_in pi;
+ uint32_t queue_id;
+ ofp_port_t out_port;
-static bool
-may_recv(const struct lswitch *sw, uint16_t port_no, bool any_actions)
-{
- unsigned int state = get_port_state(sw, port_no);
- return !(any_actions
- ? state & (P_DISABLED | P_LISTENING | P_BLOCKING)
- : state & (P_DISABLED | P_LISTENING | P_BLOCKING | P_LEARNING));
-}
+ uint64_t ofpacts_stub[64 / 8];
+ struct ofpbuf ofpacts;
-static bool
-may_send(const struct lswitch *sw, uint16_t port_no)
-{
- return get_port_state(sw, port_no) & P_FORWARDING;
-}
+ struct ofputil_packet_out po;
+ enum ofperr error;
-static void
-process_flow_stats(struct lswitch *sw, struct rconn *rconn,
- const struct ofp_flow_stats *ofs)
-{
- const char *end = (char *) ofs + ntohs(ofs->length);
- bool delete = false;
-
- /* Decide to delete the flow if it matches on an STP-disabled physical
- * port. But don't delete it if the flow just drops all received packets,
- * because that's a perfectly reasonable thing to do for disabled physical
- * ports. */
- if (!(ofs->match.wildcards & htonl(OFPFW_IN_PORT))) {
- if (!may_recv(sw, ntohs(ofs->match.in_port),
- end > (char *) ofs->actions)) {
- delete = true;
- sw->n_no_recv++;
- }
- }
+ struct ofpbuf pkt;
+ struct flow flow;
- /* Decide to delete the flow if it forwards to an STP-disabled physical
- * port. */
- if (!delete) {
- const struct ofp_action_header *a;
- size_t len;
-
- for (a = ofs->actions; (char *) a < end; a += len / 8) {
- len = ntohs(a->len);
- if (len > end - (char *) a) {
- VLOG_DBG_RL(&rl, "%012llx: action exceeds available space "
- "(%zu > %td)",
- sw->datapath_id, len, end - (char *) a);
- break;
- } else if (len % 8) {
- VLOG_DBG_RL(&rl, "%012llx: action length (%zu) not multiple "
- "of 8 bytes", sw->datapath_id, len);
- break;
- }
+ error = ofputil_decode_packet_in(&pi, oh);
+ if (error) {
+ VLOG_WARN_RL(&rl, "failed to decode packet-in: %s",
+ ofperr_to_string(error));
+ return;
+ }
- if (a->type == htons(OFPAT_OUTPUT)) {
- struct ofp_action_output *oao = (struct ofp_action_output *) a;
- if (!may_send(sw, ntohs(oao->port))) {
- delete = true;
- sw->n_no_send++;
- break;
- }
- }
- }
+ /* Ignore packets sent via output to OFPP_CONTROLLER. This library never
+ * uses such an action. You never know what experiments might be going on,
+ * though, and it seems best not to interfere with them. */
+ if (pi.reason != OFPR_NO_MATCH) {
+ return;
}
- /* Delete the flow. */
- if (delete) {
- struct ofp_flow_mod *ofm;
- struct ofpbuf *b;
+ /* Extract flow data from 'opi' into 'flow'. */
+ ofpbuf_use_const(&pkt, pi.packet, pi.packet_len);
+ flow_extract(&pkt, NULL, &flow);
+ flow.in_port.ofp_port = pi.fmd.in_port;
+ flow.tunnel.tun_id = pi.fmd.tun_id;
+
+ /* Choose output port. */
+ out_port = lswitch_choose_destination(sw, &flow);
+
+ /* Make actions. */
+ queue_id = get_queue_id(sw, pi.fmd.in_port);
+ ofpbuf_use_stack(&ofpacts, ofpacts_stub, sizeof ofpacts_stub);
+ if (out_port == OFPP_NONE) {
+ /* No actions. */
+ } else if (queue_id == UINT32_MAX
+ || ofp_to_u16(out_port) >= ofp_to_u16(OFPP_MAX)) {
+ ofpact_put_OUTPUT(&ofpacts)->port = out_port;
+ } else {
+ struct ofpact_enqueue *enqueue = ofpact_put_ENQUEUE(&ofpacts);
+ enqueue->port = out_port;
+ enqueue->queue = queue_id;
+ }
+ ofpact_pad(&ofpacts);
- ofm = make_openflow(offsetof(struct ofp_flow_mod, actions),
- OFPT_FLOW_MOD, &b);
- ofm->match = ofs->match;
- ofm->command = OFPFC_DELETE_STRICT;
- rconn_send(rconn, b, NULL);
+ /* Prepare packet_out in case we need one. */
+ po.buffer_id = pi.buffer_id;
+ if (po.buffer_id == UINT32_MAX) {
+ po.packet = ofpbuf_data(&pkt);
+ po.packet_len = ofpbuf_size(&pkt);
+ } else {
+ po.packet = NULL;
+ po.packet_len = 0;
}
-}
+ po.in_port = pi.fmd.in_port;
+ po.ofpacts = ofpbuf_data(&ofpacts);
+ po.ofpacts_len = ofpbuf_size(&ofpacts);
-static void
-process_stats_reply(struct lswitch *sw, struct rconn *rconn, void *osr_)
-{
- struct ofp_stats_reply *osr = osr_;
- struct flow_stats_iterator i;
- const struct ofp_flow_stats *fs;
+ /* Send the packet, and possibly the whole flow, to the output port. */
+ if (sw->max_idle >= 0 && (!sw->ml || out_port != OFPP_FLOOD)) {
+ struct ofputil_flow_mod fm;
+ struct ofpbuf *buffer;
- if (sw->last_query == LLONG_MIN
- || osr->type != htons(OFPST_FLOW)
- || osr->header.xid != sw->query_xid) {
- return;
- }
- for (fs = flow_stats_first(&i, osr); fs; fs = flow_stats_next(&i)) {
- sw->n_flows++;
- process_flow_stats(sw, rconn, fs);
- }
- if (!(osr->flags & htons(OFPSF_REPLY_MORE))) {
- VLOG_DBG("%012llx: Deleted %d of %d received flows to "
- "implement STP, %d because of no-recv, %d because of "
- "no-send", sw->datapath_id,
- sw->n_no_recv + sw->n_no_send, sw->n_flows,
- sw->n_no_recv, sw->n_no_send);
- sw->last_query = LLONG_MIN;
- sw->last_reply = LLONG_MIN;
+ /* The output port is known, or we always flood everything, so add a
+ * new flow. */
+ memset(&fm, 0, sizeof fm);
+ match_init(&fm.match, &flow, &sw->wc);
+ ofputil_normalize_match_quiet(&fm.match);
+ fm.priority = 0;
+ fm.table_id = 0xff;
+ fm.command = OFPFC_ADD;
+ fm.idle_timeout = sw->max_idle;
+ fm.buffer_id = pi.buffer_id;
+ fm.out_port = OFPP_NONE;
+ fm.ofpacts = ofpbuf_data(&ofpacts);
+ fm.ofpacts_len = ofpbuf_size(&ofpacts);
+ buffer = ofputil_encode_flow_mod(&fm, sw->protocol);
+
+ queue_tx(sw, buffer);
+
+ /* If the switch didn't buffer the packet, we need to send a copy. */
+ if (pi.buffer_id == UINT32_MAX && out_port != OFPP_NONE) {
+ queue_tx(sw, ofputil_encode_packet_out(&po, sw->protocol));
+ }
} else {
- sw->last_reply = time_msec();
+ /* We don't know that MAC, or we don't set up flows. Send along the
+ * packet without setting up a flow. */
+ if (pi.buffer_id != UINT32_MAX || out_port != OFPP_NONE) {
+ queue_tx(sw, ofputil_encode_packet_out(&po, sw->protocol));
+ }
}
}
+static void
+process_echo_request(struct lswitch *sw, const struct ofp_header *rq)
+{
+ queue_tx(sw, make_echo_reply(rq));
+}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff