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ovs/ofproto/connmgr.c
Brad Cowie 155f632e71 connmgr: Fix ofconn configuration on vswitchd startup. 
ofconn connection parameters, such as probe_interval and max_backoff,
are always set to their default values when vswitchd starts up even if
the user has configured these to be something different in ovsdb:

  $ ovs-vsctl set controller UUID inactivity_probe=9000

  $ journalctl -u ovs-vswitchd.service | grep "inactivity"
  ovs|10895|rconn|DBG|dp1<->tcp:127.0.0.1:6653: idle 9 seconds,
  sending inactivity probe

  $ systemctl restart openvswitch-switch.service

  $ journalctl -u ovs-vswitchd.service | grep "inactivity"
  ovs|00848|rconn|DBG|dp1<->tcp:127.0.0.1:6653: idle 5 seconds,
  sending inactivity probe

This bug was introduced by commit a0baa7df (connmgr: Make treatment of
active and passive connections more uniform.).

This happens because ofservice_reconfigure() loops over each
ofconn in ofservice->conns and calls ofconn_reconfigure() on it
to set the configuration parameters, however when ofservice_reconfigure()
is called from ofservice_create(), ofservice->conns hasn't been populated
yet so ofconn_reconfigure() is never called.

This commit moves the ofservice_reconfigure() call to ofconn_create()
where ofservice->conns is populated.

This commit also removes the hardcoded default values for
inactivity_probe (5s) and max_backoff (8s) on initial creation
of the ofservice, as these config values are available from the
ofproto_controller struct c.

Signed-off-by: Brad Cowie <brad@faucet.nz>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Simon Horman <horms@ovn.org>
2023-10-05 10:36:37 +02:00

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/*
* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2019 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include <errno.h>
#include <stdlib.h>
#include "bundles.h"
#include "connmgr.h"
#include "coverage.h"
#include "fail-open.h"
#include "in-band.h"
#include "odp-util.h"
#include "ofproto-provider.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/ofp-actions.h"
#include "openvswitch/ofp-msgs.h"
#include "openvswitch/ofp-monitor.h"
#include "openvswitch/ofpbuf.h"
#include "openvswitch/vconn.h"
#include "openvswitch/vlog.h"
#include "ovs-atomic.h"
#include "pinsched.h"
#include "openvswitch/poll-loop.h"
#include "openvswitch/rconn.h"
#include "openvswitch/shash.h"
#include "sat-math.h"
#include "simap.h"
#include "stream.h"
#include "timeval.h"
#include "util.h"
VLOG_DEFINE_THIS_MODULE(connmgr);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
/* An OpenFlow connection.
*
*
* Thread-safety
* =============
*
* 'ofproto_mutex' must be held whenever an ofconn is created or destroyed or,
* more or less equivalently, whenever an ofconn is added to or removed from a
* connmgr. 'ofproto_mutex' doesn't protect the data inside the ofconn, except
* as specifically noted below. */
struct ofconn {
struct connmgr *connmgr; /* Connection's manager. */
struct ovs_list connmgr_node; /* In connmgr->conns. */
struct ofservice *ofservice; /* Connection's service. */
struct ovs_list ofservice_node; /* In service->conns. */
struct rconn *rconn; /* OpenFlow connection. */
enum ofconn_type type; /* Type. */
enum ofproto_band band; /* In-band or out-of-band? */
bool want_packet_in_on_miss;
/* OpenFlow state. */
enum ofp12_controller_role role; /* Role. */
enum ofputil_protocol protocol; /* Current protocol variant. */
enum ofputil_packet_in_format packet_in_format;
/* OFPT_PACKET_IN related data. */
int packet_in_queue_size;
struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */
#define N_SCHEDULERS 2
struct pinsched *schedulers[N_SCHEDULERS];
int miss_send_len; /* Bytes to send of buffered packets. */
uint16_t controller_id; /* Connection controller ID. */
/* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
* requests, and the maximum number before we stop reading OpenFlow
* requests. */
#define OFCONN_REPLY_MAX 100
struct rconn_packet_counter *reply_counter;
/* Asynchronous message configuration in each possible role.
*
* A 1-bit enables sending an asynchronous message for one possible reason
* that the message might be generated, a 0-bit disables it. */
struct ofputil_async_cfg *async_cfg;
/* Flow table operation logging. */
int n_add, n_delete, n_modify; /* Number of unreported ops of each kind. */
long long int first_op, last_op; /* Range of times for unreported ops. */
long long int next_op_report; /* Time to report ops, or LLONG_MAX. */
long long int op_backoff; /* Earliest time to report ops again. */
/* Reassembly of multipart requests. */
struct hmap assembler;
/* Flow monitors (e.g. NXST_FLOW_MONITOR). */
/* Configuration. Contains "struct ofmonitor"s. */
struct hmap monitors OVS_GUARDED_BY(ofproto_mutex);
/* Flow control.
*
* When too many flow monitor notifications back up in the transmit buffer,
* we pause the transmission of further notifications. These members track
* the flow control state.
*
* When notifications are flowing, 'monitor_paused' is 0. When
* notifications are paused, 'monitor_paused' is the value of
* 'monitor_seqno' at the point we paused.
*
* 'monitor_counter' counts the OpenFlow messages and bytes currently in
* flight. This value growing too large triggers pausing. */
uint64_t monitor_paused OVS_GUARDED_BY(ofproto_mutex);
struct rconn_packet_counter *monitor_counter OVS_GUARDED_BY(ofproto_mutex);
/* State of monitors for a single ongoing flow_mod.
*
* 'updates' is a list of "struct ofpbuf"s that contain
* NXST_FLOW_MONITOR_REPLY messages representing the changes made by the
* current flow_mod.
*
* When 'updates' is nonempty, 'sent_abbrev_update' is true if 'updates'
* contains an update event of type NXFME_ABBREV and false otherwise.. */
struct ovs_list updates OVS_GUARDED_BY(ofproto_mutex);
bool sent_abbrev_update OVS_GUARDED_BY(ofproto_mutex);
/* Active bundles. Contains "struct ofp_bundle"s. */
struct hmap bundles;
long long int next_bundle_expiry_check;
};
/* vswitchd/ovs-vswitchd.8.in documents the value of BUNDLE_IDLE_LIFETIME in
* seconds. That documentation must be kept in sync with the value below. */
#define BUNDLE_EXPIRY_INTERVAL 1000 /* Check bundle expiry every 1 sec. */
#define BUNDLE_IDLE_TIMEOUT_DEFAULT 10000 /* Expire idle bundles after
* 10 seconds. */
static unsigned int bundle_idle_timeout = BUNDLE_IDLE_TIMEOUT_DEFAULT;
static void ofconn_create(struct ofservice *, struct rconn *,
const struct ofproto_controller *settings)
OVS_EXCLUDED(ofproto_mutex);
static void ofconn_destroy(struct ofconn *) OVS_REQUIRES(ofproto_mutex);
static void ofconn_reconfigure(struct ofconn *,
const struct ofproto_controller *);
static void ofconn_run(struct ofconn *,
void (*handle_openflow)(struct ofconn *,
const struct ovs_list *msgs));
static void ofconn_wait(struct ofconn *);
static void ofconn_log_flow_mods(struct ofconn *);
static char *ofconn_make_name(const struct connmgr *, const char *target);
static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst);
static void ofconn_send(const struct ofconn *, struct ofpbuf *,
struct rconn_packet_counter *);
static void do_send_packet_ins(struct ofconn *, struct ovs_list *txq);
/* A listener for incoming OpenFlow connections or for establishing an
* outgoing connection. */
struct ofservice {
struct hmap_node hmap_node; /* In connmgr->services, by target. */
struct connmgr *connmgr;
char *target; /* e.g. "tcp:..." or "pssl:...". */
struct ovs_list conns; /* "ofconn"s generated by this service. */
enum ofconn_type type; /* OFCONN_PRIMARY or OFCONN_SERVICE. */
/* Source of connections. */
struct rconn *rconn; /* Active connection only. */
struct pvconn *pvconn; /* Passive listener only. */
/* Settings for "struct ofconn"s established by this service. */
struct ofproto_controller s;
};
static void ofservice_run(struct ofservice *);
static void ofservice_wait(struct ofservice *);
static int ofservice_reconfigure(struct ofservice *,
const struct ofproto_controller *)
OVS_REQUIRES(ofproto_mutex);
static void ofservice_create(struct connmgr *mgr, const char *target,
const struct ofproto_controller *)
OVS_REQUIRES(ofproto_mutex);
static void ofservice_destroy(struct ofservice *) OVS_REQUIRES(ofproto_mutex);
static struct ofservice *ofservice_lookup(struct connmgr *,
const char *target);
/* Connection manager for an OpenFlow switch. */
struct connmgr {
struct ofproto *ofproto;
char *name;
char *local_port_name;
/* OpenFlow connections.
*
* All modifications to 'conns' protected by ofproto_mutex, so that any
* traversals from other threads can be made safe by holding the
* ofproto_mutex.*/
struct ovs_list conns; /* All ofconns. */
uint64_t primary_election_id; /* monotonically increasing sequence number
* for primary election */
bool primary_election_id_defined;
/* OpenFlow connection establishment. */
struct hmap services; /* Contains "struct ofservice"s. */
struct pvconn **snoops;
size_t n_snoops;
/* Fail open. */
struct fail_open *fail_open;
enum ofproto_fail_mode fail_mode;
/* In-band control. */
struct in_band *in_band;
struct sockaddr_in *extra_in_band_remotes;
size_t n_extra_remotes;
int in_band_queue;
ATOMIC(int) want_packet_in_on_miss; /* Sum of ofconns' values. */
};
static void update_in_band_remotes(struct connmgr *);
static void add_snooper(struct connmgr *, struct vconn *);
static void ofmonitor_run(struct connmgr *);
static void ofmonitor_wait(struct connmgr *);
/* Creates and returns a new connection manager owned by 'ofproto'. 'name' is
* a name for the ofproto suitable for using in log messages.
* 'local_port_name' is the name of the local port (OFPP_LOCAL) within
* 'ofproto'. */
struct connmgr *
connmgr_create(struct ofproto *ofproto,
const char *name, const char *local_port_name)
{
struct connmgr *mgr = xmalloc(sizeof *mgr);
mgr->ofproto = ofproto;
mgr->name = xstrdup(name);
mgr->local_port_name = xstrdup(local_port_name);
ovs_list_init(&mgr->conns);
mgr->primary_election_id = 0;
mgr->primary_election_id_defined = false;
hmap_init(&mgr->services);
mgr->snoops = NULL;
mgr->n_snoops = 0;
mgr->fail_open = NULL;
mgr->fail_mode = OFPROTO_FAIL_SECURE;
mgr->in_band = NULL;
mgr->extra_in_band_remotes = NULL;
mgr->n_extra_remotes = 0;
mgr->in_band_queue = -1;
atomic_init(&mgr->want_packet_in_on_miss, 0);
return mgr;
}
/* The default "table-miss" behaviour for OpenFlow1.3+ is to drop the
* packet rather than to send the packet to the controller.
*
* This function maintains the count of pre-OpenFlow1.3 with controller_id 0,
* as we assume these are the controllers that should receive "table-miss"
* notifications. */
static void
update_want_packet_in_on_miss(struct ofconn *ofconn)
{
/* We want a packet-in on miss when controller_id is zero and OpenFlow is
* lower than version 1.3. */
enum ofputil_protocol p = ofconn->protocol;
int new_want = (ofconn->controller_id == 0 &&
(p == OFPUTIL_P_NONE ||
ofputil_protocol_to_ofp_version(p) < OFP13_VERSION));
/* Update the setting and the count if necessary. */
int old_want = ofconn->want_packet_in_on_miss;
if (old_want != new_want) {
atomic_int *dst = &ofconn->connmgr->want_packet_in_on_miss;
int count;
atomic_read_relaxed(dst, &count);
atomic_store_relaxed(dst, count - old_want + new_want);
ofconn->want_packet_in_on_miss = new_want;
}
}
/* Frees 'mgr' and all of its resources. */
void
connmgr_destroy(struct connmgr *mgr)
OVS_REQUIRES(ofproto_mutex)
{
if (!mgr) {
return;
}
struct ofservice *ofservice;
HMAP_FOR_EACH_SAFE (ofservice, hmap_node, &mgr->services) {
ofservice_destroy(ofservice);
}
hmap_destroy(&mgr->services);
ovs_assert(ovs_list_is_empty(&mgr->conns));
for (size_t i = 0; i < mgr->n_snoops; i++) {
pvconn_close(mgr->snoops[i]);
}
free(mgr->snoops);
fail_open_destroy(mgr->fail_open);
mgr->fail_open = NULL;
in_band_destroy(mgr->in_band);
mgr->in_band = NULL;
free(mgr->extra_in_band_remotes);
free(mgr->name);
free(mgr->local_port_name);
free(mgr);
}
/* Does all of the periodic maintenance required by 'mgr'. Calls
* 'handle_openflow' for each message received on an OpenFlow connection,
* passing along the OpenFlow connection itself and the message that was sent.
* 'handle_openflow' must not modify or free the message. */
void
connmgr_run(struct connmgr *mgr,
void (*handle_openflow)(struct ofconn *,
const struct ovs_list *msgs))
OVS_EXCLUDED(ofproto_mutex)
{
if (mgr->in_band) {
if (!in_band_run(mgr->in_band)) {
in_band_destroy(mgr->in_band);
mgr->in_band = NULL;
}
}
struct ofconn *ofconn;
LIST_FOR_EACH_SAFE (ofconn, connmgr_node, &mgr->conns) {
ofconn_run(ofconn, handle_openflow);
}
ofmonitor_run(mgr);
/* Fail-open maintenance. Do this after processing the ofconns since
* fail-open checks the status of the controller rconn. */
if (mgr->fail_open) {
fail_open_run(mgr->fail_open);
}
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
ofservice_run(ofservice);
}
for (size_t i = 0; i < mgr->n_snoops; i++) {
struct vconn *vconn;
int retval = pvconn_accept(mgr->snoops[i], &vconn);
if (!retval) {
add_snooper(mgr, vconn);
} else if (retval != EAGAIN) {
VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval));
}
}
}
/* Causes the poll loop to wake up when connmgr_run() needs to run. */
void
connmgr_wait(struct connmgr *mgr)
{
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
ofconn_wait(ofconn);
}
ofmonitor_wait(mgr);
if (mgr->in_band) {
in_band_wait(mgr->in_band);
}
if (mgr->fail_open) {
fail_open_wait(mgr->fail_open);
}
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
ofservice_wait(ofservice);
}
for (size_t i = 0; i < mgr->n_snoops; i++) {
pvconn_wait(mgr->snoops[i]);
}
}
/* Adds some memory usage statistics for 'mgr' into 'usage', for use with
* memory_report(). */
void
connmgr_get_memory_usage(const struct connmgr *mgr, struct simap *usage)
{
unsigned int packets = 0;
unsigned int ofconns = 0;
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
ofconns++;
packets += rconn_count_txqlen(ofconn->rconn);
for (int i = 0; i < N_SCHEDULERS; i++) {
struct pinsched_stats stats;
pinsched_get_stats(ofconn->schedulers[i], &stats);
packets += stats.n_queued;
}
}
simap_increase(usage, "ofconns", ofconns);
simap_increase(usage, "packets", packets);
}
/* Returns the ofproto that owns 'ofconn''s connmgr. */
struct ofproto *
ofconn_get_ofproto(const struct ofconn *ofconn)
{
return ofconn->connmgr->ofproto;
}
/* Sets the bundle idle timeout to 'timeout' seconds, interpreting 0 as
* requesting the default timeout.
*
* The OpenFlow spec mandates the timeout to be at least one second; . */
void
connmgr_set_bundle_idle_timeout(unsigned timeout)
{
bundle_idle_timeout = (timeout
? sat_mul(timeout, 1000)
: BUNDLE_IDLE_TIMEOUT_DEFAULT);
}
/* OpenFlow configuration. */
static void update_fail_open(struct connmgr *) OVS_EXCLUDED(ofproto_mutex);
static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
const struct sset *);
/* Returns true if 'mgr' has any configured primary controllers.
*
* Service controllers do not count, but configured primary controllers do
* count whether or not they are currently connected. */
bool
connmgr_has_controllers(const struct connmgr *mgr)
{
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
if (ofservice->type == OFCONN_PRIMARY) {
return true;
}
}
return false;
}
static struct ofconn *
ofservice_first_conn(const struct ofservice *ofservice)
{
return (ovs_list_is_empty(&ofservice->conns)
? NULL
: CONTAINER_OF(ofservice->conns.next,
struct ofconn, ofservice_node));
}
/* Initializes 'info' and populates it with information about each configured
* primary controller. The keys in 'info' are the controllers' targets; the
* data values are corresponding "struct ofproto_controller_info".
*
* The caller owns 'info' and everything in it and should free it when it is no
* longer needed. */
void
connmgr_get_controller_info(struct connmgr *mgr, struct shash *info)
{
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
const struct rconn *rconn = ofservice->rconn;
if (!rconn) {
continue;
}
const char *target = rconn_get_target(rconn);
if (!shash_find(info, target)) {
struct ofconn *ofconn = ofservice_first_conn(ofservice);
struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo);
long long int now = time_msec();
long long int last_connection = rconn_get_last_connection(rconn);
long long int last_disconnect = rconn_get_last_disconnect(rconn);
int last_error = rconn_get_last_error(rconn);
int i;
shash_add(info, target, cinfo);
cinfo->is_connected = rconn_is_connected(rconn);
cinfo->role = ofconn ? ofconn->role : OFPCR12_ROLE_NOCHANGE;
smap_init(&cinfo->pairs);
if (last_error) {
smap_add(&cinfo->pairs, "last_error",
ovs_retval_to_string(last_error));
}
smap_add(&cinfo->pairs, "state", rconn_get_state(rconn));
if (last_connection != LLONG_MIN) {
smap_add_format(&cinfo->pairs, "sec_since_connect",
"%lld", (now - last_connection) / 1000);
}
if (last_disconnect != LLONG_MIN) {
smap_add_format(&cinfo->pairs, "sec_since_disconnect",
"%lld", (now - last_disconnect) / 1000);
}
for (i = 0; i < N_SCHEDULERS; i++) {
if (ofconn && ofconn->schedulers[i]) {
const char *name = i ? "miss" : "action";
struct pinsched_stats stats;
pinsched_get_stats(ofconn->schedulers[i], &stats);
smap_add_nocopy(&cinfo->pairs,
xasprintf("packet-in-%s-backlog", name),
xasprintf("%u", stats.n_queued));
smap_add_nocopy(&cinfo->pairs,
xasprintf("packet-in-%s-bypassed", name),
xasprintf("%llu", stats.n_normal));
smap_add_nocopy(&cinfo->pairs,
xasprintf("packet-in-%s-queued", name),
xasprintf("%llu", stats.n_limited));
smap_add_nocopy(&cinfo->pairs,
xasprintf("packet-in-%s-dropped", name),
xasprintf("%llu", stats.n_queue_dropped));
}
}
}
}
}
void
connmgr_free_controller_info(struct shash *info)
{
struct shash_node *node;
SHASH_FOR_EACH (node, info) {
struct ofproto_controller_info *cinfo = node->data;
smap_destroy(&cinfo->pairs);
free(cinfo);
}
shash_destroy(info);
}
/* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in
* 'controllers'. */
void
connmgr_set_controllers(struct connmgr *mgr, struct shash *controllers)
OVS_EXCLUDED(ofproto_mutex)
{
bool had_controllers = connmgr_has_controllers(mgr);
/* Required to add and remove ofconns. This could probably be narrowed to
* cover a smaller amount of code, if that yielded some benefit. */
ovs_mutex_lock(&ofproto_mutex);
/* Create newly configured services. */
struct shash_node *node;
SHASH_FOR_EACH (node, controllers) {
const char *target = node->name;
const struct ofproto_controller *c = node->data;
if (!ofservice_lookup(mgr, target)) {
ofservice_create(mgr, target, c);
}
}
/* Delete services that are no longer configured.
* Update configuration of all now-existing services. */
struct ofservice *ofservice;
HMAP_FOR_EACH_SAFE (ofservice, hmap_node, &mgr->services) {
const char *target = ofservice->target;
struct ofproto_controller *c = shash_find_data(controllers, target);
if (!c) {
VLOG_INFO("%s: removed %s controller \"%s\"",
mgr->name, ofconn_type_to_string(ofservice->type),
target);
ofservice_destroy(ofservice);
} else {
if (ofservice_reconfigure(ofservice, c)) {
char *target_to_restore = xstrdup(target);
VLOG_INFO("%s: Changes to controller \"%s\" "
"expects re-initialization: Re-initializing now.",
mgr->name, target);
ofservice_destroy(ofservice);
ofservice_create(mgr, target_to_restore, c);
free(target_to_restore);
}
}
}
ovs_mutex_unlock(&ofproto_mutex);
update_in_band_remotes(mgr);
update_fail_open(mgr);
if (had_controllers != connmgr_has_controllers(mgr)) {
ofproto_flush_flows(mgr->ofproto);
}
}
/* Drops the connections between 'mgr' and all of its primary and secondary
* controllers, forcing them to reconnect. */
void
connmgr_reconnect(const struct connmgr *mgr)
{
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
rconn_reconnect(ofconn->rconn);
}
}
/* Sets the "snoops" for 'mgr' to the pvconn targets listed in 'snoops'.
*
* A "snoop" is a pvconn to which every OpenFlow message to or from the most
* important controller on 'mgr' is mirrored. */
int
connmgr_set_snoops(struct connmgr *mgr, const struct sset *snoops)
{
return set_pvconns(&mgr->snoops, &mgr->n_snoops, snoops);
}
/* Adds each of the snoops currently configured on 'mgr' to 'snoops'. */
void
connmgr_get_snoops(const struct connmgr *mgr, struct sset *snoops)
{
for (size_t i = 0; i < mgr->n_snoops; i++) {
sset_add(snoops, pvconn_get_name(mgr->snoops[i]));
}
}
/* Returns true if 'mgr' has at least one snoop, false if it has none. */
bool
connmgr_has_snoops(const struct connmgr *mgr)
{
return mgr->n_snoops > 0;
}
static void
update_in_band_remotes(struct connmgr *mgr)
{
/* Allocate enough memory for as many remotes as we could possibly have. */
size_t max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->services);
struct sockaddr_in *addrs = xmalloc(max_addrs * sizeof *addrs);
size_t n_addrs = 0;
/* Add all the remotes. */
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
const char *target = ofservice->target;
union {
struct sockaddr_storage ss;
struct sockaddr_in in;
} sa;
if (ofservice->s.band == OFPROTO_IN_BAND
&& stream_parse_target_with_default_port(target, OFP_PORT, &sa.ss)
&& sa.ss.ss_family == AF_INET) {
addrs[n_addrs++] = sa.in;
}
}
for (size_t i = 0; i < mgr->n_extra_remotes; i++) {
addrs[n_addrs++] = mgr->extra_in_band_remotes[i];
}
/* Create or update or destroy in-band. */
if (n_addrs) {
if (!mgr->in_band) {
in_band_create(mgr->ofproto, mgr->local_port_name, &mgr->in_band);
}
} else {
/* in_band_run() needs a chance to delete any existing in-band flows.
* We will destroy mgr->in_band after it's done with that. */
}
if (mgr->in_band) {
in_band_set_queue(mgr->in_band, mgr->in_band_queue);
in_band_set_remotes(mgr->in_band, addrs, n_addrs);
}
/* Clean up. */
free(addrs);
}
static void
update_fail_open(struct connmgr *mgr)
OVS_EXCLUDED(ofproto_mutex)
{
if (connmgr_has_controllers(mgr)
&& mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
if (!mgr->fail_open) {
mgr->fail_open = fail_open_create(mgr->ofproto, mgr);
}
} else {
ovs_mutex_lock(&ofproto_mutex);
fail_open_destroy(mgr->fail_open);
ovs_mutex_unlock(&ofproto_mutex);
mgr->fail_open = NULL;
}
}
static int
set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp,
const struct sset *sset)
{
/* Free the old pvconns. */
struct pvconn **old_pvconns = *pvconnsp;
size_t old_n_pvconns = *n_pvconnsp;
for (size_t i = 0; i < old_n_pvconns; i++) {
pvconn_close(old_pvconns[i]);
}
free(old_pvconns);
/* Populate the new pvconns. */
struct pvconn **new_pvconns = xmalloc(sset_count(sset)
* sizeof *new_pvconns);
size_t new_n_pvconns = 0;
int retval = 0;
const char *name;
SSET_FOR_EACH (name, sset) {
struct pvconn *pvconn;
int error = pvconn_open(name, 0, 0, &pvconn);
if (!error) {
new_pvconns[new_n_pvconns++] = pvconn;
} else {
VLOG_ERR("failed to listen on %s: %s", name, ovs_strerror(error));
if (!retval) {
retval = error;
}
}
}
*pvconnsp = new_pvconns;
*n_pvconnsp = new_n_pvconns;
return retval;
}
/* Returns a "preference level" for snooping 'ofconn'. A higher return value
* means that 'ofconn' is more interesting for monitoring than a lower return
* value. */
static int
snoop_preference(const struct ofservice *ofservice)
{
struct ofconn *ofconn = ofservice_first_conn(ofservice);
if (!ofconn) {
return 0;
}
switch (ofconn->role) {
case OFPCR12_ROLE_PRIMARY:
return 3;
case OFPCR12_ROLE_EQUAL:
return 2;
case OFPCR12_ROLE_SECONDARY:
return 1;
case OFPCR12_ROLE_NOCHANGE:
default:
/* Shouldn't happen. */
return 0;
}
}
/* One of 'mgr''s "snoop" pvconns has accepted a new connection on 'vconn'.
* Connects this vconn to a controller. */
static void
add_snooper(struct connmgr *mgr, struct vconn *vconn)
{
/* Pick a controller for monitoring. */
struct ofservice *best = NULL;
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
if (ofservice->rconn &&
(!best || snoop_preference(ofservice) > snoop_preference(best))) {
best = ofservice;
}
}
if (best) {
rconn_add_monitor(best->rconn, vconn);
} else {
VLOG_INFO_RL(&rl, "no controller connection to snoop");
vconn_close(vconn);
}
}
/* Public ofconn functions. */
/* Returns the connection type, either OFCONN_PRIMARY or OFCONN_SERVICE. */
enum ofconn_type
ofconn_get_type(const struct ofconn *ofconn)
{
return ofconn->type;
}
/* If a primary election id is defined, stores it into '*idp' and returns
* true. Otherwise, stores UINT64_MAX into '*idp' and returns false. */
bool
ofconn_get_primary_election_id(const struct ofconn *ofconn, uint64_t *idp)
{
*idp = (ofconn->connmgr->primary_election_id_defined
? ofconn->connmgr->primary_election_id
: UINT64_MAX);
return ofconn->connmgr->primary_election_id_defined;
}
/* Sets the primary election id.
*
* Returns true if successful, false if the id is stale
*/
bool
ofconn_set_primary_election_id(struct ofconn *ofconn, uint64_t id)
{
if (ofconn->connmgr->primary_election_id_defined
&&
/* Unsigned difference interpreted as a two's complement signed
* value */
(int64_t)(id - ofconn->connmgr->primary_election_id) < 0) {
return false;
}
ofconn->connmgr->primary_election_id = id;
ofconn->connmgr->primary_election_id_defined = true;
return true;
}
/* Returns the role configured for 'ofconn'.
*
* The default role, if no other role has been set, is OFPCR12_ROLE_EQUAL. */
enum ofp12_controller_role
ofconn_get_role(const struct ofconn *ofconn)
{
return ofconn->role;
}
void
ofconn_send_role_status(struct ofconn *ofconn, uint32_t role, uint8_t reason)
{
struct ofputil_role_status status;
status.reason = reason;
status.role = role;
ofconn_get_primary_election_id(ofconn, &status.generation_id);
struct ofpbuf *buf
= ofputil_encode_role_status(&status, ofconn_get_protocol(ofconn));
if (buf) {
ofconn_send(ofconn, buf, NULL);
}
}
/* Changes 'ofconn''s role to 'role'. If 'role' is OFPCR12_ROLE_PRIMARY then
* any existing primary is demoted to a secondary. */
void
ofconn_set_role(struct ofconn *ofconn, enum ofp12_controller_role role)
{
if (role != ofconn->role && role == OFPCR12_ROLE_PRIMARY) {
struct ofconn *other;
LIST_FOR_EACH (other, connmgr_node, &ofconn->connmgr->conns) {
if (other->role == OFPCR12_ROLE_PRIMARY) {
other->role = OFPCR12_ROLE_SECONDARY;
ofconn_send_role_status(other, OFPCR12_ROLE_SECONDARY,
OFPCRR_PRIMARY_REQUEST);
}
}
}
ofconn->role = role;
}
void
ofconn_set_invalid_ttl_to_controller(struct ofconn *ofconn, bool enable)
{
struct ofputil_async_cfg ac = ofconn_get_async_config(ofconn);
uint32_t bit = 1u << OFPR_INVALID_TTL;
if (enable) {
ac.primary[OAM_PACKET_IN] |= bit;
} else {
ac.primary[OAM_PACKET_IN] &= ~bit;
}
ofconn_set_async_config(ofconn, &ac);
}
bool
ofconn_get_invalid_ttl_to_controller(struct ofconn *ofconn)
{
struct ofputil_async_cfg ac = ofconn_get_async_config(ofconn);
uint32_t bit = 1u << OFPR_INVALID_TTL;
return (ac.primary[OAM_PACKET_IN] & bit) != 0;
}
/* Returns the currently configured protocol for 'ofconn', one of OFPUTIL_P_*.
*
* Returns OFPUTIL_P_NONE, which is not a valid protocol, if 'ofconn' hasn't
* completed version negotiation. This can't happen if at least one OpenFlow
* message, other than OFPT_HELLO, has been received on the connection (such as
* in ofproto.c's message handling code), since version negotiation is a
* prerequisite for starting to receive messages. This means that
* OFPUTIL_P_NONE is a special case that most callers need not worry about. */
enum ofputil_protocol
ofconn_get_protocol(const struct ofconn *ofconn)
{
if (ofconn->protocol == OFPUTIL_P_NONE &&
rconn_is_connected(ofconn->rconn)) {
int version = rconn_get_version(ofconn->rconn);
if (version > 0) {
ofconn_set_protocol(CONST_CAST(struct ofconn *, ofconn),
ofputil_protocol_from_ofp_version(version));
}
}
return ofconn->protocol;
}
/* Sets the protocol for 'ofconn' to 'protocol' (one of OFPUTIL_P_*).
*
* (This doesn't actually send anything to accomplish this. Presumably the
* caller already did that.) */
void
ofconn_set_protocol(struct ofconn *ofconn, enum ofputil_protocol protocol)
{
ofconn->protocol = protocol;
update_want_packet_in_on_miss(ofconn);
}
/* Returns the currently configured packet in format for 'ofconn', one of
* NXPIF_*.
*
* The default, if no other format has been set, is NXPIF_STANDARD. */
enum ofputil_packet_in_format
ofconn_get_packet_in_format(struct ofconn *ofconn)
{
return ofconn->packet_in_format;
}
/* Sets the packet in format for 'ofconn' to 'packet_in_format' (one of
* NXPIF_*). */
void
ofconn_set_packet_in_format(struct ofconn *ofconn,
enum ofputil_packet_in_format packet_in_format)
{
ofconn->packet_in_format = packet_in_format;
}
/* Sets the controller connection ID for 'ofconn' to 'controller_id'.
*
* The connection controller ID is used for OFPP_CONTROLLER and
* NXAST_CONTROLLER actions. See "struct nx_action_controller" for details. */
void
ofconn_set_controller_id(struct ofconn *ofconn, uint16_t controller_id)
{
ofconn->controller_id = controller_id;
update_want_packet_in_on_miss(ofconn);
}
/* Returns the default miss send length for 'ofconn'. */
int
ofconn_get_miss_send_len(const struct ofconn *ofconn)
{
return ofconn->miss_send_len;
}
/* Sets the default miss send length for 'ofconn' to 'miss_send_len'. */
void
ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len)
{
ofconn->miss_send_len = miss_send_len;
}
void
ofconn_set_async_config(struct ofconn *ofconn,
const struct ofputil_async_cfg *ac)
{
if (!ofconn->async_cfg) {
ofconn->async_cfg = xmalloc(sizeof *ofconn->async_cfg);
}
*ofconn->async_cfg = *ac;
if (ofputil_protocol_to_ofp_version(ofconn_get_protocol(ofconn))
< OFP14_VERSION) {
if (ofconn->async_cfg->primary[OAM_PACKET_IN] & (1u << OFPR_ACTION)) {
ofconn->async_cfg->primary[OAM_PACKET_IN] |= OFPR14_ACTION_BITS;
}
if (ofconn->async_cfg->secondary[OAM_PACKET_IN] & (1u << OFPR_ACTION)) {
ofconn->async_cfg->secondary[OAM_PACKET_IN] |= OFPR14_ACTION_BITS;
}
}
}
struct ofputil_async_cfg
ofconn_get_async_config(const struct ofconn *ofconn)
{
if (ofconn->async_cfg) {
return *ofconn->async_cfg;
}
int version = rconn_get_version(ofconn->rconn);
return (version < 0 || !ofconn->ofservice->s.enable_async_msgs
? OFPUTIL_ASYNC_CFG_INIT
: ofputil_async_cfg_default(version));
}
/* Sends 'msg' on 'ofconn', accounting it as a reply. (If there is a
* sufficient number of OpenFlow replies in-flight on a single ofconn, then the
* connmgr will stop accepting new OpenFlow requests on that ofconn until the
* controller has accepted some of the replies.) */
void
ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg)
{
ofconn_send(ofconn, msg, ofconn->reply_counter);
}
/* Sends each of the messages in list 'replies' on 'ofconn' in order,
* accounting them as replies. */
void
ofconn_send_replies(const struct ofconn *ofconn, struct ovs_list *replies)
{
struct ofpbuf *reply;
LIST_FOR_EACH_POP (reply, list_node, replies) {
ofconn_send_reply(ofconn, reply);
}
}
/* Sends 'error' on 'ofconn', as a reply to 'request'. */
void
ofconn_send_error(const struct ofconn *ofconn,
const struct ofp_header *request, enum ofperr error)
{
static struct vlog_rate_limit err_rl = VLOG_RATE_LIMIT_INIT(10, 10);
struct ofpbuf *reply = ofperr_encode_reply(error, request);
if (!VLOG_DROP_INFO(&err_rl)) {
size_t request_len = ntohs(request->length);
enum ofpraw raw;
const char *type_name = (!ofpraw_decode_partial(&raw, request,
MIN(64, request_len))
? ofpraw_get_name(raw)
: "invalid");
VLOG_INFO("%s: sending %s error reply to %s message",
rconn_get_name(ofconn->rconn), ofperr_to_string(error),
type_name);
}
ofconn_send_reply(ofconn, reply);
}
/* Reports that a flow_mod operation of the type specified by 'command' was
* successfully executed by 'ofconn', so that the connmgr can log it. */
void
ofconn_report_flow_mod(struct ofconn *ofconn,
enum ofp_flow_mod_command command)
{
switch (command) {
case OFPFC_ADD:
ofconn->n_add++;
break;
case OFPFC_MODIFY:
case OFPFC_MODIFY_STRICT:
ofconn->n_modify++;
break;
case OFPFC_DELETE:
case OFPFC_DELETE_STRICT:
ofconn->n_delete++;
break;
}
long long int now = time_msec();
if (ofconn->next_op_report == LLONG_MAX) {
ofconn->first_op = now;
ofconn->next_op_report = MAX(now + 10 * 1000, ofconn->op_backoff);
ofconn->op_backoff = ofconn->next_op_report + 60 * 1000;
}
ofconn->last_op = now;
}
/* OpenFlow 1.4 bundles. */
static inline uint32_t
bundle_hash(uint32_t id)
{
return hash_int(id, 0);
}
struct ofp_bundle *
ofconn_get_bundle(struct ofconn *ofconn, uint32_t id)
{
struct ofp_bundle *bundle;
HMAP_FOR_EACH_IN_BUCKET(bundle, node, bundle_hash(id), &ofconn->bundles) {
if (bundle->id == id) {
return bundle;
}
}
return NULL;
}
void
ofconn_insert_bundle(struct ofconn *ofconn, struct ofp_bundle *bundle)
{
hmap_insert(&ofconn->bundles, &bundle->node, bundle_hash(bundle->id));
}
void
ofconn_remove_bundle(struct ofconn *ofconn, struct ofp_bundle *bundle)
{
hmap_remove(&ofconn->bundles, &bundle->node);
}
static void
bundle_remove_all(struct ofconn *ofconn)
{
struct ofp_bundle *b;
HMAP_FOR_EACH_SAFE (b, node, &ofconn->bundles) {
ofp_bundle_remove__(ofconn, b);
}
}
static void
bundle_remove_expired(struct ofconn *ofconn, long long int now)
{
long long int limit = now - bundle_idle_timeout;
struct ofp_bundle *b;
HMAP_FOR_EACH_SAFE (b, node, &ofconn->bundles) {
if (b->used <= limit) {
ofconn_send_error(ofconn, b->msg, OFPERR_OFPBFC_TIMEOUT);
ofp_bundle_remove__(ofconn, b);
}
}
}
/* Private ofconn functions. */
static void
ofconn_create(struct ofservice *ofservice, struct rconn *rconn,
const struct ofproto_controller *settings)
OVS_EXCLUDED(ofproto_mutex)
{
ovs_mutex_lock(&ofproto_mutex);
struct ofconn *ofconn = xzalloc(sizeof *ofconn);
ofconn->connmgr = ofservice->connmgr;
ovs_list_push_back(&ofservice->connmgr->conns, &ofconn->connmgr_node);
hmap_init(&ofconn->assembler);
ofconn->ofservice = ofservice;
ovs_list_push_back(&ofservice->conns, &ofconn->ofservice_node);
ofconn->rconn = rconn;
ofconn->type = settings->type;
ofconn->band = settings->band;
ofconn->role = OFPCR12_ROLE_EQUAL;
ofconn_set_protocol(ofconn, OFPUTIL_P_NONE);
ofconn->packet_in_format = OFPUTIL_PACKET_IN_STD;
ofconn->packet_in_queue_size = settings->max_pktq_size;
ofconn->packet_in_counter = rconn_packet_counter_create();
ofconn->miss_send_len = (ofconn->type == OFCONN_PRIMARY
? OFP_DEFAULT_MISS_SEND_LEN
: 0);
ofconn->controller_id = 0;
ofconn->reply_counter = rconn_packet_counter_create();
ofconn->async_cfg = NULL;
ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
ofconn->first_op = ofconn->last_op = LLONG_MIN;
ofconn->next_op_report = LLONG_MAX;
ofconn->op_backoff = LLONG_MIN;
hmap_init(&ofconn->monitors);
ofconn->monitor_counter = rconn_packet_counter_create();
ovs_list_init(&ofconn->updates);
hmap_init(&ofconn->bundles);
ofconn->next_bundle_expiry_check = time_msec() + BUNDLE_EXPIRY_INTERVAL;
ofservice_reconfigure(ofservice, settings);
ovs_mutex_unlock(&ofproto_mutex);
}
static void
ofconn_destroy(struct ofconn *ofconn)
OVS_REQUIRES(ofproto_mutex)
{
if (!ofconn) {
return;
}
ofconn_log_flow_mods(ofconn);
ovs_list_remove(&ofconn->connmgr_node);
ovs_list_remove(&ofconn->ofservice_node);
if (ofconn->rconn != ofconn->ofservice->rconn) {
rconn_destroy(ofconn->rconn);
}
/* Force clearing of want_packet_in_on_miss to keep the global count
* accurate. */
ofconn->controller_id = 1;
update_want_packet_in_on_miss(ofconn);
rconn_packet_counter_destroy(ofconn->packet_in_counter);
for (int i = 0; i < N_SCHEDULERS; i++) {
if (ofconn->schedulers[i]) {
pinsched_destroy(ofconn->schedulers[i]);
}
}
rconn_packet_counter_destroy(ofconn->reply_counter);
free(ofconn->async_cfg);
struct ofmonitor *monitor;
HMAP_FOR_EACH_SAFE (monitor, ofconn_node,
&ofconn->monitors) {
ofmonitor_destroy(monitor);
}
hmap_destroy(&ofconn->monitors);
rconn_packet_counter_destroy(ofconn->monitor_counter);
ofpbuf_list_delete(&ofconn->updates); /* ...but it should be empty. */
bundle_remove_all(ofconn);
hmap_destroy(&ofconn->bundles);
free(ofconn);
}
/* Reconfigures 'ofconn' to match 'c'. */
static void
ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c)
{
rconn_set_max_backoff(ofconn->rconn, c->max_backoff);
int probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0;
rconn_set_probe_interval(ofconn->rconn, probe_interval);
ofconn->band = c->band;
ofconn->packet_in_queue_size = c->max_pktq_size;
ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit);
if (c->dscp != rconn_get_dscp(ofconn->rconn)) {
rconn_set_dscp(ofconn->rconn, c->dscp);
rconn_reconnect(ofconn->rconn);
}
}
/* Returns true if it makes sense for 'ofconn' to receive and process OpenFlow
* messages. */
static bool
ofconn_may_recv(const struct ofconn *ofconn)
{
int count = rconn_packet_counter_n_packets(ofconn->reply_counter);
return count < OFCONN_REPLY_MAX;
}
static void
ofconn_run(struct ofconn *ofconn,
void (*handle_openflow)(struct ofconn *,
const struct ovs_list *msgs))
{
struct connmgr *mgr = ofconn->connmgr;
for (size_t i = 0; i < N_SCHEDULERS; i++) {
struct ovs_list txq;
pinsched_run(ofconn->schedulers[i], &txq);
do_send_packet_ins(ofconn, &txq);
}
rconn_run(ofconn->rconn);
/* Limit the number of iterations to avoid starving other tasks. */
for (int i = 0; i < 50 && ofconn_may_recv(ofconn); i++) {
struct ofpbuf *of_msg = rconn_recv(ofconn->rconn);
if (!of_msg) {
break;
}
if (mgr->fail_open) {
fail_open_maybe_recover(mgr->fail_open);
}
struct ovs_list msgs;
enum ofperr error = ofpmp_assembler_execute(&ofconn->assembler, of_msg,
&msgs, time_msec());
if (error) {
ofconn_send_error(ofconn, of_msg->data, error);
ofpbuf_delete(of_msg);
} else if (!ovs_list_is_empty(&msgs)) {
handle_openflow(ofconn, &msgs);
ofpbuf_list_delete(&msgs);
}
}
long long int now = time_msec();
if (now >= ofconn->next_bundle_expiry_check) {
ofconn->next_bundle_expiry_check = now + BUNDLE_EXPIRY_INTERVAL;
bundle_remove_expired(ofconn, now);
}
if (now >= ofconn->next_op_report) {
ofconn_log_flow_mods(ofconn);
}
struct ofpbuf *error = ofpmp_assembler_run(&ofconn->assembler,
time_msec());
if (error) {
ofconn_send(ofconn, error, NULL);
}
ovs_mutex_lock(&ofproto_mutex);
if (rconn_is_reliable(ofconn->rconn)
? !rconn_is_connected(ofconn->rconn)
: !rconn_is_alive(ofconn->rconn)) {
ofconn_destroy(ofconn);
}
ovs_mutex_unlock(&ofproto_mutex);
}
static void
ofconn_wait(struct ofconn *ofconn)
{
for (int i = 0; i < N_SCHEDULERS; i++) {
pinsched_wait(ofconn->schedulers[i]);
}
rconn_run_wait(ofconn->rconn);
if (ofconn_may_recv(ofconn)) {
rconn_recv_wait(ofconn->rconn);
}
if (ofconn->next_op_report != LLONG_MAX) {
poll_timer_wait_until(ofconn->next_op_report);
}
poll_timer_wait_until(ofpmp_assembler_wait(&ofconn->assembler));
}
static void
ofconn_log_flow_mods(struct ofconn *ofconn)
{
int n_flow_mods = ofconn->n_add + ofconn->n_delete + ofconn->n_modify;
if (n_flow_mods) {
long long int ago = (time_msec() - ofconn->first_op) / 1000;
long long int interval = (ofconn->last_op - ofconn->first_op) / 1000;
struct ds s;
ds_init(&s);
ds_put_format(&s, "%d flow_mods ", n_flow_mods);
if (interval == ago) {
ds_put_format(&s, "in the last %lld s", ago);
} else if (interval) {
ds_put_format(&s, "in the %lld s starting %lld s ago",
interval, ago);
} else {
ds_put_format(&s, "%lld s ago", ago);
}
ds_put_cstr(&s, " (");
if (ofconn->n_add) {
ds_put_format(&s, "%d adds, ", ofconn->n_add);
}
if (ofconn->n_delete) {
ds_put_format(&s, "%d deletes, ", ofconn->n_delete);
}
if (ofconn->n_modify) {
ds_put_format(&s, "%d modifications, ", ofconn->n_modify);
}
s.length -= 2;
ds_put_char(&s, ')');
VLOG_INFO("%s: %s", rconn_get_name(ofconn->rconn), ds_cstr(&s));
ds_destroy(&s);
ofconn->n_add = ofconn->n_delete = ofconn->n_modify = 0;
}
ofconn->next_op_report = LLONG_MAX;
}
/* Returns true if 'ofconn' should receive asynchronous messages of the given
* OAM_* 'type' and 'reason', which should be a OFPR_* value for OAM_PACKET_IN,
* a OFPPR_* value for OAM_PORT_STATUS, or an OFPRR_* value for
* OAM_FLOW_REMOVED. Returns false if the message should not be sent on
* 'ofconn'. */
static bool
ofconn_receives_async_msg(const struct ofconn *ofconn,
enum ofputil_async_msg_type type,
unsigned int reason)
{
ovs_assert(reason < 32);
ovs_assert((unsigned int) type < OAM_N_TYPES);
if (!rconn_is_connected(ofconn->rconn) || !ofconn_get_protocol(ofconn)) {
return false;
}
/* Keep the following code in sync with the documentation in the
* "Asynchronous Messages" section in 'topics/design' */
if (ofconn->type == OFCONN_SERVICE && !ofconn->miss_send_len) {
/* Service connections don't get asynchronous messages unless they have
* explicitly asked for them by setting a nonzero miss send length. */
return false;
}
struct ofputil_async_cfg ac = ofconn_get_async_config(ofconn);
uint32_t *masks = (ofconn->role == OFPCR12_ROLE_SECONDARY
? ac.secondary
: ac.primary);
return (masks[type] & (1u << reason)) != 0;
}
/* This function returns true to indicate that a packet_in message
* for a "table-miss" should be sent to at least one controller.
*
* False otherwise. */
bool
connmgr_wants_packet_in_on_miss(struct connmgr *mgr)
{
int count;
atomic_read_relaxed(&mgr->want_packet_in_on_miss, &count);
return count > 0;
}
/* Returns a human-readable name for an OpenFlow connection between 'mgr' and
* 'target', suitable for use in log messages for identifying the connection.
*
* The name is dynamically allocated. The caller should free it (with free())
* when it is no longer needed. */
static char *
ofconn_make_name(const struct connmgr *mgr, const char *target)
{
return xasprintf("%s<->%s", mgr->name, target);
}
static void
ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst)
{
for (int i = 0; i < N_SCHEDULERS; i++) {
struct pinsched **s = &ofconn->schedulers[i];
if (rate > 0) {
if (!*s) {
*s = pinsched_create(rate, burst);
} else {
pinsched_set_limits(*s, rate, burst);
}
} else {
pinsched_destroy(*s);
*s = NULL;
}
}
}
static void
ofconn_send(const struct ofconn *ofconn, struct ofpbuf *msg,
struct rconn_packet_counter *counter)
{
ofpmsg_update_length(msg);
rconn_send(ofconn->rconn, msg, counter);
}
/* Sending asynchronous messages. */
/* Sends an OFPT_PORT_STATUS message with 'new_pp' and 'reason' to appropriate
* controllers managed by 'mgr'. For messages caused by a controller
* OFPT_PORT_MOD, specify 'source' as the controller connection that sent the
* request; otherwise, specify 'source' as NULL.
*
* If 'reason' is OFPPR_MODIFY and 'old_pp' is nonnull, then messages are
* suppressed in the case where the change would not be visible to a particular
* controller. For example, OpenFlow 1.0 does not have the OFPPS_LIVE flag, so
* this would suppress a change solely to that flag from being sent to an
* OpenFlow 1.0 controller. */
void
connmgr_send_port_status(struct connmgr *mgr, struct ofconn *source,
const struct ofputil_phy_port *old_pp,
const struct ofputil_phy_port *new_pp,
uint8_t reason)
{
/* XXX Should limit the number of queued port status change messages. */
struct ofputil_port_status new_ps = { reason, *new_pp };
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofconn_receives_async_msg(ofconn, OAM_PORT_STATUS, reason)) {
/* Before 1.5, OpenFlow specified that OFPT_PORT_MOD should not
* generate OFPT_PORT_STATUS messages. That requirement was a
* relic of how OpenFlow originally supported a single controller,
* so that one could expect the controller to already know the
* changes it had made.
*
* EXT-338 changes OpenFlow 1.5 OFPT_PORT_MOD to send
* OFPT_PORT_STATUS messages to every controller. This is
* obviously more useful in the multi-controller case. We could
* always implement it that way in OVS, but that would risk
* confusing controllers that are intended for single-controller
* use only. (Imagine a controller that generates an OFPT_PORT_MOD
* in response to any OFPT_PORT_STATUS!)
*
* So this compromises: for OpenFlow 1.4 and earlier, it generates
* OFPT_PORT_STATUS for OFPT_PORT_MOD, but not back to the
* originating controller. In a single-controller environment, in
* particular, this means that it will never generate
* OFPT_PORT_STATUS for OFPT_PORT_MOD at all. */
if (ofconn == source
&& rconn_get_version(ofconn->rconn) < OFP15_VERSION) {
continue;
}
enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
struct ofpbuf *msg = ofputil_encode_port_status(&new_ps, protocol);
if (reason == OFPPR_MODIFY && old_pp) {
struct ofputil_port_status old_ps = { reason, *old_pp };
struct ofpbuf *old_msg = ofputil_encode_port_status(&old_ps,
protocol);
bool suppress = ofpbuf_equal(msg, old_msg);
ofpbuf_delete(old_msg);
if (suppress) {
ofpbuf_delete(msg);
continue;
}
}
ofconn_send(ofconn, msg, NULL);
}
}
}
/* Sends an OFPT_REQUESTFORWARD message with 'request' and 'reason' to
* appropriate controllers managed by 'mgr'. For messages caused by a
* controller OFPT_GROUP_MOD and OFPT_METER_MOD, specify 'source' as the
* controller connection that sent the request; otherwise, specify 'source'
* as NULL. */
void
connmgr_send_requestforward(struct connmgr *mgr, const struct ofconn *source,
const struct ofputil_requestforward *rf)
{
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
/* METER_MOD only supported in OF13 and up. */
if (rf->reason == OFPRFR_METER_MOD
&& rconn_get_version(ofconn->rconn) < OFP13_VERSION) {
continue;
}
if (ofconn_receives_async_msg(ofconn, OAM_REQUESTFORWARD, rf->reason)
&& ofconn != source) {
enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
ofconn_send(ofconn, ofputil_encode_requestforward(rf, protocol),
NULL);
}
}
}
/* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to
* appropriate controllers managed by 'mgr'.
*
* This may be called from the RCU thread. */
void
connmgr_send_flow_removed(struct connmgr *mgr,
const struct ofputil_flow_removed *fr)
OVS_REQUIRES(ofproto_mutex)
{
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofconn_receives_async_msg(ofconn, OAM_FLOW_REMOVED, fr->reason)) {
/* Account flow expirations as replies to OpenFlow requests. That
* works because preventing OpenFlow requests from being processed
* also prevents new flows from being added (and expiring). (It
* also prevents processing OpenFlow requests that would not add
* new flows, so it is imperfect.) */
struct ofpbuf *msg = ofputil_encode_flow_removed(
fr, ofconn_get_protocol(ofconn));
ofconn_send_reply(ofconn, msg);
}
}
}
/* Sends an OFPT_TABLE_STATUS message with 'reason' to appropriate controllers
* managed by 'mgr'. When the table state changes, the controller needs to be
* informed with the OFPT_TABLE_STATUS message. The reason values
* OFPTR_VACANCY_DOWN and OFPTR_VACANCY_UP identify a vacancy message. The
* vacancy events are generated when the remaining space in the flow table
* changes and crosses one of the vacancy thereshold specified by
* OFPT_TABLE_MOD. */
void
connmgr_send_table_status(struct connmgr *mgr,
const struct ofputil_table_desc *td,
uint8_t reason)
{
struct ofputil_table_status ts = {
.reason = reason,
.desc = *td
};
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofconn_receives_async_msg(ofconn, OAM_TABLE_STATUS, reason)) {
struct ofpbuf *msg;
msg = ofputil_encode_table_status(&ts,
ofconn_get_protocol(ofconn));
if (msg) {
ofconn_send(ofconn, msg, NULL);
}
}
}
}
COVERAGE_DEFINE(connmgr_async_unsent);
/* Given 'pin', sends an OFPT_PACKET_IN message to each OpenFlow controller as
* necessary according to their individual configurations. */
void
connmgr_send_async_msg(struct connmgr *mgr,
const struct ofproto_async_msg *am)
{
struct ofconn *ofconn;
bool sent = false;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
enum ofputil_protocol protocol = ofconn_get_protocol(ofconn);
if (protocol == OFPUTIL_P_NONE || !rconn_is_connected(ofconn->rconn)
|| ofconn->controller_id != am->controller_id
|| !ofconn_receives_async_msg(ofconn, am->oam,
am->pin.up.base.reason)) {
continue;
}
struct ofpbuf *msg = ofputil_encode_packet_in_private(
&am->pin.up, protocol, ofconn->packet_in_format);
struct ovs_list txq;
bool is_miss = (am->pin.up.base.reason == OFPR_NO_MATCH ||
am->pin.up.base.reason == OFPR_EXPLICIT_MISS ||
am->pin.up.base.reason == OFPR_IMPLICIT_MISS);
pinsched_send(ofconn->schedulers[is_miss],
am->pin.up.base.flow_metadata.flow.in_port.ofp_port,
msg, &txq);
do_send_packet_ins(ofconn, &txq);
sent = true;
}
if (!sent) {
COVERAGE_INC(connmgr_async_unsent);
}
}
static void
do_send_packet_ins(struct ofconn *ofconn, struct ovs_list *txq)
{
struct ofpbuf *pin;
LIST_FOR_EACH_POP (pin, list_node, txq) {
if (rconn_send_with_limit(ofconn->rconn, pin,
ofconn->packet_in_counter,
ofconn->packet_in_queue_size) == EAGAIN) {
static struct vlog_rate_limit rll = VLOG_RATE_LIMIT_INIT(5, 5);
VLOG_INFO_RL(&rll, "%s: dropping packet-in due to queue overflow",
rconn_get_name(ofconn->rconn));
}
}
}
/* Fail-open settings. */
/* Returns the failure handling mode (OFPROTO_FAIL_SECURE or
* OFPROTO_FAIL_STANDALONE) for 'mgr'. */
enum ofproto_fail_mode
connmgr_get_fail_mode(const struct connmgr *mgr)
{
return mgr->fail_mode;
}
/* Sets the failure handling mode for 'mgr' to 'fail_mode' (either
* OFPROTO_FAIL_SECURE or OFPROTO_FAIL_STANDALONE). */
void
connmgr_set_fail_mode(struct connmgr *mgr, enum ofproto_fail_mode fail_mode)
{
if (mgr->fail_mode != fail_mode) {
mgr->fail_mode = fail_mode;
update_fail_open(mgr);
if (!connmgr_has_controllers(mgr)) {
ofproto_flush_flows(mgr->ofproto);
}
}
}
/* Fail-open implementation. */
/* Returns the longest probe interval among the primary controllers configured
* on 'mgr'. Returns 0 if there are no primary controllers. */
int
connmgr_get_max_probe_interval(const struct connmgr *mgr)
{
int max_probe_interval = 0;
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
if (ofservice->type == OFCONN_PRIMARY) {
int probe_interval = ofservice->s.probe_interval;
max_probe_interval = MAX(max_probe_interval, probe_interval);
}
}
return max_probe_interval;
}
/* Returns the number of seconds for which all of 'mgr's active, primary
* controllers have been disconnected. Returns 0 if 'mgr' has no active,
* primary controllers. */
int
connmgr_failure_duration(const struct connmgr *mgr)
{
int min_failure_duration = INT_MAX;
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
if (ofservice->s.type == OFCONN_PRIMARY && ofservice->rconn) {
int failure_duration = rconn_failure_duration(ofservice->rconn);
min_failure_duration = MIN(min_failure_duration, failure_duration);
}
}
return min_failure_duration != INT_MAX ? min_failure_duration : 0;
}
/* Returns true if at least one primary controller is connected (regardless of
* whether those controllers are believed to have authenticated and accepted
* this switch), false if none of them are connected. */
bool
connmgr_is_any_controller_connected(const struct connmgr *mgr)
{
struct ofservice *ofservice;
HMAP_FOR_EACH (ofservice, hmap_node, &mgr->services) {
if (ofservice->s.type == OFCONN_PRIMARY
&& !ovs_list_is_empty(&ofservice->conns)) {
return true;
}
}
return false;
}
/* Returns true if at least one primary controller is believed to have
* authenticated and accepted this switch, false otherwise. */
bool
connmgr_is_any_controller_admitted(const struct connmgr *mgr)
{
const struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofconn->type == OFCONN_PRIMARY
&& rconn_is_admitted(ofconn->rconn)) {
return true;
}
}
return false;
}
/* In-band configuration. */
static bool any_extras_changed(const struct connmgr *,
const struct sockaddr_in *extras, size_t n);
/* Sets the 'n' TCP port addresses in 'extras' as ones to which 'mgr''s
* in-band control should guarantee access, in the same way that in-band
* control guarantees access to OpenFlow controllers. */
void
connmgr_set_extra_in_band_remotes(struct connmgr *mgr,
const struct sockaddr_in *extras, size_t n)
{
if (!any_extras_changed(mgr, extras, n)) {
return;
}
free(mgr->extra_in_band_remotes);
mgr->n_extra_remotes = n;
mgr->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras);
update_in_band_remotes(mgr);
}
/* Sets the OpenFlow queue used by flows set up by in-band control on
* 'mgr' to 'queue_id'. If 'queue_id' is negative, then in-band control
* flows will use the default queue. */
void
connmgr_set_in_band_queue(struct connmgr *mgr, int queue_id)
{
if (queue_id != mgr->in_band_queue) {
mgr->in_band_queue = queue_id;
update_in_band_remotes(mgr);
}
}
static bool
any_extras_changed(const struct connmgr *mgr,
const struct sockaddr_in *extras, size_t n)
{
if (n != mgr->n_extra_remotes) {
return true;
}
for (size_t i = 0; i < n; i++) {
const struct sockaddr_in *old = &mgr->extra_in_band_remotes[i];
const struct sockaddr_in *new = &extras[i];
if (old->sin_addr.s_addr != new->sin_addr.s_addr ||
old->sin_port != new->sin_port) {
return true;
}
}
return false;
}
/* In-band implementation. */
bool
connmgr_has_in_band(struct connmgr *mgr)
{
return mgr->in_band != NULL;
}
/* Fail-open and in-band implementation. */
/* Called by 'ofproto' after all flows have been flushed, to allow fail-open
* and standalone mode to re-create their flows.
*
* In-band control has more sophisticated code that manages flows itself. */
void
connmgr_flushed(struct connmgr *mgr)
OVS_EXCLUDED(ofproto_mutex)
{
if (mgr->fail_open) {
fail_open_flushed(mgr->fail_open);
}
/* If there are no controllers and we're in standalone mode, set up a flow
* that matches every packet and directs them to OFPP_NORMAL (which goes to
* us). Otherwise, the switch is in secure mode and we won't pass any
* traffic until a controller has been defined and it tells us to do so. */
if (!connmgr_has_controllers(mgr)
&& mgr->fail_mode == OFPROTO_FAIL_STANDALONE) {
struct ofpbuf ofpacts;
struct match match;
ofpbuf_init(&ofpacts, sizeof(struct ofpact_output));
ofpact_put_OUTPUT(&ofpacts)->port = OFPP_NORMAL;
match_init_catchall(&match);
ofproto_add_flow(mgr->ofproto, &match, 0, ofpacts.data,
ofpacts.size);
ofpbuf_uninit(&ofpacts);
}
}
/* Returns the number of hidden rules created by the in-band and fail-open
* implementations in table 0. (Subtracting this count from the number of
* rules in the table 0 classifier, as maintained in struct oftable, yields
* the number of flows that OVS should report via OpenFlow for table 0.) */
int
connmgr_count_hidden_rules(const struct connmgr *mgr)
{
int n_hidden = 0;
if (mgr->in_band) {
n_hidden += in_band_count_rules(mgr->in_band);
}
if (mgr->fail_open) {
n_hidden += fail_open_count_rules(mgr->fail_open);
}
return n_hidden;
}
/* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful,
* otherwise a positive errno value. */
static void
ofservice_create(struct connmgr *mgr, const char *target,
const struct ofproto_controller *c)
OVS_REQUIRES(ofproto_mutex)
{
struct pvconn *pvconn = NULL;
struct rconn *rconn = NULL;
if (!vconn_verify_name(target)) {
char *name = ofconn_make_name(mgr, target);
rconn = rconn_create(c->probe_interval, c->max_backoff,
c->dscp, c->allowed_versions);
rconn_connect(rconn, target, name);
free(name);
} else if (!pvconn_verify_name(target)) {
int error = pvconn_open(target, c->allowed_versions, c->dscp, &pvconn);
if (error) {
return;
}
} else {
VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"",
mgr->name, target);
return;
}
struct ofservice *ofservice = xzalloc(sizeof *ofservice);
hmap_insert(&mgr->services, &ofservice->hmap_node, hash_string(target, 0));
ofservice->connmgr = mgr;
ofservice->target = xstrdup(target);
ovs_list_init(&ofservice->conns);
ofservice->type = c->type;
ofservice->rconn = rconn;
ofservice->pvconn = pvconn;
ofservice->s = *c;
VLOG_INFO("%s: added %s controller \"%s\"",
mgr->name, ofconn_type_to_string(ofservice->type), target);
}
static void
ofservice_close_all(struct ofservice *ofservice)
OVS_REQUIRES(ofproto_mutex)
{
struct ofconn *ofconn;
LIST_FOR_EACH_SAFE (ofconn, ofservice_node, &ofservice->conns) {
ofconn_destroy(ofconn);
}
}
static void
ofservice_destroy(struct ofservice *ofservice)
OVS_REQUIRES(ofproto_mutex)
{
if (!ofservice) {
return;
}
ofservice_close_all(ofservice);
hmap_remove(&ofservice->connmgr->services, &ofservice->hmap_node);
free(ofservice->target);
if (ofservice->pvconn) {
pvconn_close(ofservice->pvconn);
}
if (ofservice->rconn) {
rconn_destroy(ofservice->rconn);
}
free(ofservice);
}
static void
ofservice_run(struct ofservice *ofservice)
{
if (ofservice->pvconn) {
struct vconn *vconn;
int retval = pvconn_accept(ofservice->pvconn, &vconn);
if (!retval) {
/* Passing default value for creation of the rconn */
struct rconn *rconn = rconn_create(
ofservice->s.probe_interval, ofservice->s.max_backoff,
ofservice->s.dscp, ofservice->s.allowed_versions);
char *name = ofconn_make_name(ofservice->connmgr,
vconn_get_name(vconn));
rconn_connect_unreliably(rconn, vconn, name);
free(name);
ofconn_create(ofservice, rconn, &ofservice->s);
} else if (retval != EAGAIN) {
VLOG_WARN_RL(&rl, "accept failed (%s)", ovs_strerror(retval));
}
} else {
rconn_run(ofservice->rconn);
bool connected = rconn_is_connected(ofservice->rconn);
bool has_ofconn = !ovs_list_is_empty(&ofservice->conns);
if (connected && !has_ofconn) {
ofconn_create(ofservice, ofservice->rconn, &ofservice->s);
}
}
}
static void
ofservice_wait(struct ofservice *ofservice)
{
if (ofservice->pvconn) {
pvconn_wait(ofservice->pvconn);
}
}
static int
ofservice_reconfigure(struct ofservice *ofservice,
const struct ofproto_controller *settings)
OVS_REQUIRES(ofproto_mutex)
{
/* If the allowed OpenFlow versions change, a full cleanup is needed
* for the ofservice and connections. */
if (ofservice->s.allowed_versions != settings->allowed_versions) {
return -EINVAL;
}
ofservice->s = *settings;
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, ofservice_node, &ofservice->conns) {
ofconn_reconfigure(ofconn, settings);
}
return 0;
}
/* Finds and returns the ofservice within 'mgr' that has the given
* 'target', or a null pointer if none exists. */
static struct ofservice *
ofservice_lookup(struct connmgr *mgr, const char *target)
{
struct ofservice *ofservice;
HMAP_FOR_EACH_WITH_HASH (ofservice, hmap_node, hash_string(target, 0),
&mgr->services) {
if (!strcmp(ofservice->target, target)) {
return ofservice;
}
}
return NULL;
}
/* Flow monitors (NXST_FLOW_MONITOR). */
/* A counter incremented when something significant happens to an OpenFlow
* rule.
*
* - When a rule is added, its 'add_seqno' and 'modify_seqno' are set to
* the current value (which is then incremented).
*
* - When a rule is modified, its 'modify_seqno' is set to the current
* value (which is then incremented).
*
* Thus, by comparing an old value of monitor_seqno against a rule's
* 'add_seqno', one can tell whether the rule was added before or after the old
* value was read, and similarly for 'modify_seqno'.
*
* 32 bits should normally be sufficient (and would be nice, to save space in
* each rule) but then we'd have to have some special cases for wraparound.
*
* We initialize monitor_seqno to 1 to allow 0 to be used as an invalid
* value. */
static uint64_t monitor_seqno = 1;
COVERAGE_DEFINE(ofmonitor_pause);
COVERAGE_DEFINE(ofmonitor_resume);
enum ofperr
ofmonitor_create(const struct ofputil_flow_monitor_request *request,
struct ofconn *ofconn, struct ofmonitor **monitorp)
OVS_REQUIRES(ofproto_mutex)
{
*monitorp = NULL;
struct ofmonitor *m = ofmonitor_lookup(ofconn, request->id);
if (m) {
return OFPERR_OFPMOFC_MONITOR_EXISTS;
}
m = xmalloc(sizeof *m);
m->ofconn = ofconn;
hmap_insert(&ofconn->monitors, &m->ofconn_node, hash_int(request->id, 0));
m->id = request->id;
m->flags = request->flags;
m->out_port = request->out_port;
m->out_group = request->out_group;
m->table_id = request->table_id;
minimatch_init(&m->match, &request->match);
*monitorp = m;
return 0;
}
struct ofmonitor *
ofmonitor_lookup(struct ofconn *ofconn, uint32_t id)
OVS_REQUIRES(ofproto_mutex)
{
struct ofmonitor *m;
HMAP_FOR_EACH_IN_BUCKET (m, ofconn_node, hash_int(id, 0),
&ofconn->monitors) {
if (m->id == id) {
return m;
}
}
return NULL;
}
void
ofmonitor_destroy(struct ofmonitor *m)
OVS_REQUIRES(ofproto_mutex)
{
if (m) {
minimatch_destroy(&m->match);
hmap_remove(&m->ofconn->monitors, &m->ofconn_node);
free(m);
}
}
void
ofmonitor_report(struct connmgr *mgr, struct rule *rule,
enum ofp_flow_update_event event,
enum ofp_flow_removed_reason reason,
const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid,
const struct rule_actions *old_actions)
OVS_REQUIRES(ofproto_mutex)
{
if (!mgr || rule_is_hidden(rule)) {
return;
}
enum ofp14_flow_monitor_flags update;
switch (event) {
case OFPFME_ADDED:
update = OFPFMF_ADD;
rule->add_seqno = rule->modify_seqno = monitor_seqno++;
break;
case OFPFME_REMOVED:
update = OFPFMF_REMOVED;
break;
case OFPFME_MODIFIED:
update = OFPFMF_MODIFY;
rule->modify_seqno = monitor_seqno++;
break;
default:
case OFPFME_INITIAL:
case OFPFME_PAUSED:
case OFPFME_RESUMED:
case OFPFME_ABBREV:
OVS_NOT_REACHED();
}
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofconn->monitor_paused) {
/* Only send OFPFME_REMOVED notifications for flows that were added
* before we paused. */
if (event != OFPFME_REMOVED
|| rule->add_seqno > ofconn->monitor_paused) {
continue;
}
}
enum ofp14_flow_monitor_flags flags = 0;
struct ofmonitor *m;
HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
if (m->flags & update
&& (m->table_id == 0xff || m->table_id == rule->table_id)
&& (ofproto_rule_has_out_port(rule, m->out_port)
|| (old_actions
&& ofpacts_output_to_port(old_actions->ofpacts,
old_actions->ofpacts_len,
m->out_port)))
&& ofproto_rule_has_out_group(rule, m->out_group)
&& cls_rule_is_loose_match(&rule->cr, &m->match)) {
flags |= m->flags;
}
}
if (flags) {
if (ovs_list_is_empty(&ofconn->updates)) {
ofputil_start_flow_update(&ofconn->updates,
ofconn_get_protocol(ofconn));
ofconn->sent_abbrev_update = false;
}
if (flags & OFPFMF_ONLY_OWN || ofconn != abbrev_ofconn
|| ofconn->monitor_paused) {
struct ofputil_flow_update fu;
fu.event = event;
fu.reason = event == OFPFME_REMOVED ? reason : 0;
fu.table_id = rule->table_id;
fu.cookie = rule->flow_cookie;
minimatch_expand(&rule->cr.match, &fu.match);
fu.priority = rule->cr.priority;
ovs_mutex_lock(&rule->mutex);
fu.idle_timeout = rule->idle_timeout;
fu.hard_timeout = rule->hard_timeout;
ovs_mutex_unlock(&rule->mutex);
if (flags & OFPFMF_INSTRUCTIONS) {
const struct rule_actions *actions
= rule_get_actions(rule);
fu.ofpacts = actions->ofpacts;
fu.ofpacts_len = actions->ofpacts_len;
} else {
fu.ofpacts = NULL;
fu.ofpacts_len = 0;
}
ofputil_append_flow_update(&fu, &ofconn->updates,
ofproto_get_tun_tab(rule->ofproto));
} else if (!ofconn->sent_abbrev_update) {
struct ofputil_flow_update fu;
fu.event = OFPFME_ABBREV;
fu.xid = abbrev_xid;
ofputil_append_flow_update(&fu, &ofconn->updates,
ofproto_get_tun_tab(rule->ofproto));
ofconn->sent_abbrev_update = true;
}
}
}
}
void
ofmonitor_flush(struct connmgr *mgr)
OVS_REQUIRES(ofproto_mutex)
{
struct ofconn *ofconn;
enum ofputil_protocol protocol;
if (!mgr) {
return;
}
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
struct rconn_packet_counter *counter = ofconn->monitor_counter;
struct ofpbuf *msg;
LIST_FOR_EACH_POP (msg, list_node, &ofconn->updates) {
ofconn_send(ofconn, msg, counter);
}
if (!ofconn->monitor_paused
&& rconn_packet_counter_n_bytes(counter) > 128 * 1024) {
COVERAGE_INC(ofmonitor_pause);
ofconn->monitor_paused = monitor_seqno++;
protocol = ofconn_get_protocol(ofconn);
struct ofpbuf *pause = ofputil_encode_flow_monitor_pause(
OFPFME_PAUSED,protocol);
ofconn_send(ofconn, pause, counter);
}
}
}
static void
ofmonitor_resume(struct ofconn *ofconn)
OVS_REQUIRES(ofproto_mutex)
{
enum ofputil_protocol protocol;
struct rule_collection rules;
rule_collection_init(&rules);
struct ofmonitor *m;
HMAP_FOR_EACH (m, ofconn_node, &ofconn->monitors) {
ofmonitor_collect_resume_rules(m, ofconn->monitor_paused, &rules);
}
struct ovs_list msgs = OVS_LIST_INITIALIZER(&msgs);
ofmonitor_compose_refresh_updates(&rules, &msgs,
ofconn_get_protocol(ofconn));
protocol = ofconn_get_protocol(ofconn);
struct ofpbuf *resumed = ofputil_encode_flow_monitor_pause(
OFPFME_RESUMED, protocol);
ovs_list_push_back(&msgs, &resumed->list_node);
ofconn_send_replies(ofconn, &msgs);
ofconn->monitor_paused = 0;
}
static bool
ofmonitor_may_resume(const struct ofconn *ofconn)
OVS_REQUIRES(ofproto_mutex)
{
return (ofconn->monitor_paused != 0
&& !rconn_packet_counter_n_packets(ofconn->monitor_counter));
}
static void
ofmonitor_run(struct connmgr *mgr)
{
ovs_mutex_lock(&ofproto_mutex);
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofmonitor_may_resume(ofconn)) {
COVERAGE_INC(ofmonitor_resume);
ofmonitor_resume(ofconn);
}
}
ovs_mutex_unlock(&ofproto_mutex);
}
static void
ofmonitor_wait(struct connmgr *mgr)
{
ovs_mutex_lock(&ofproto_mutex);
struct ofconn *ofconn;
LIST_FOR_EACH (ofconn, connmgr_node, &mgr->conns) {
if (ofmonitor_may_resume(ofconn)) {
poll_immediate_wake();
}
}
ovs_mutex_unlock(&ofproto_mutex);
}
void
ofproto_async_msg_free(struct ofproto_async_msg *am)
{
free(am->pin.up.base.packet);
free(am->pin.up.base.userdata);
free(am->pin.up.stack);
free(am->pin.up.actions);
free(am->pin.up.action_set);
free(am);
}
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