From: Ben Pfaff Date: Tue, 29 Mar 2011 19:24:28 +0000 (-0700) Subject: ofproto: Factor OpenFlow connection management into new "connmgr". X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=19a87e3637f8c278e1bc16bb9a7ab32af0a21d6b;p=openvswitch ofproto: Factor OpenFlow connection management into new "connmgr". This removes a lot of code from ofproto.c and makes the ofproto code easier to understand. --- diff --git a/ofproto/automake.mk b/ofproto/automake.mk index 6484a269..18aa7e6c 100644 --- a/ofproto/automake.mk +++ b/ofproto/automake.mk @@ -9,6 +9,8 @@ noinst_LIBRARIES += ofproto/libofproto.a ofproto_libofproto_a_SOURCES = \ ofproto/collectors.c \ ofproto/collectors.h \ + ofproto/connmgr.c \ + ofproto/connmgr.h \ ofproto/fail-open.c \ ofproto/fail-open.h \ ofproto/in-band.c \ diff --git a/ofproto/connmgr.c b/ofproto/connmgr.c new file mode 100644 index 00000000..166ef8c3 --- /dev/null +++ b/ofproto/connmgr.c @@ -0,0 +1,1318 @@ +/* + * Copyright (c) 2009, 2010, 2011 Nicira Networks. + * + * 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 + +#include "connmgr.h" + +#include +#include + +#include "coverage.h" +#include "dpif.h" +#include "fail-open.h" +#include "in-band.h" +#include "odp-util.h" +#include "ofp-util.h" +#include "ofpbuf.h" +#include "pinsched.h" +#include "poll-loop.h" +#include "pktbuf.h" +#include "rconn.h" +#include "shash.h" +#include "timeval.h" +#include "vconn.h" +#include "vlog.h" + +VLOG_DEFINE_THIS_MODULE(connmgr); +static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); + +COVERAGE_DEFINE(ofconn_stuck); + +/* An OpenFlow connection. */ +struct ofconn { + struct connmgr *connmgr; /* Connection's manager. */ + struct list node; /* In struct connmgr's "all_conns" list. */ + struct rconn *rconn; /* OpenFlow connection. */ + enum ofconn_type type; /* Type. */ + enum nx_flow_format flow_format; /* Currently selected flow format. */ + + /* OFPT_PACKET_IN related data. */ + struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */ +#define N_SCHEDULERS 2 + struct pinsched *schedulers[N_SCHEDULERS]; + struct pktbuf *pktbuf; /* OpenFlow packet buffers. */ + int miss_send_len; /* Bytes to send of buffered packets. */ + + /* 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; + + /* type == OFCONN_PRIMARY only. */ + enum nx_role role; /* Role. */ + struct hmap_node hmap_node; /* In struct connmgr's "controllers" map. */ + enum ofproto_band band; /* In-band or out-of-band? */ +}; + +static struct ofconn *ofconn_create(struct connmgr *, struct rconn *, + enum ofconn_type); +static void ofconn_destroy(struct ofconn *); + +static void ofconn_reconfigure(struct ofconn *, + const struct ofproto_controller *); + +static void ofconn_run(struct ofconn *, + void (*handle_openflow)(struct ofconn *, + struct ofpbuf *ofp_msg)); +static void ofconn_wait(struct ofconn *); + +static const char *ofconn_get_target(const 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 bool ofconn_receives_async_msgs(const struct ofconn *); + +static void ofconn_send(const struct ofconn *, struct ofpbuf *, + struct rconn_packet_counter *); + +static void do_send_packet_in(struct ofpbuf *, void *ofconn_); + +/* A listener for incoming OpenFlow "service" connections. */ +struct ofservice { + struct hmap_node node; /* In struct connmgr's "services" hmap. */ + struct pvconn *pvconn; /* OpenFlow connection listener. */ + + /* These are not used by ofservice directly. They are settings for + * accepted "struct ofconn"s from the pvconn. */ + int probe_interval; /* Max idle time before probing, in seconds. */ + int rate_limit; /* Max packet-in rate in packets per second. */ + int burst_limit; /* Limit on accumulating packet credits. */ +}; + +static void ofservice_reconfigure(struct ofservice *, + const struct ofproto_controller *); +static int ofservice_create(struct connmgr *, const char *target); +static void ofservice_destroy(struct connmgr *, struct ofservice *); +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. */ + struct hmap controllers; /* Controller "struct ofconn"s. */ + struct list all_conns; /* Contains "struct ofconn"s. */ + + /* OpenFlow listeners. */ + 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; + long long int next_in_band_update; + struct sockaddr_in *extra_in_band_remotes; + size_t n_extra_remotes; + int in_band_queue; +}; + +static void update_in_band_remotes(struct connmgr *); +static void add_snooper(struct connmgr *, struct vconn *); + +/* 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; + + mgr = xmalloc(sizeof *mgr); + mgr->ofproto = ofproto; + mgr->name = xstrdup(name); + mgr->local_port_name = xstrdup(local_port_name); + + hmap_init(&mgr->controllers); + list_init(&mgr->all_conns); + + 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->next_in_band_update = LLONG_MAX; + mgr->extra_in_band_remotes = NULL; + mgr->n_extra_remotes = 0; + mgr->in_band_queue = -1; + + return mgr; +} + +/* Frees 'mgr' and all of its resources. */ +void +connmgr_destroy(struct connmgr *mgr) +{ + struct ofservice *ofservice, *next_ofservice; + struct ofconn *ofconn, *next_ofconn; + size_t i; + + if (!mgr) { + return; + } + + LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { + ofconn_destroy(ofconn); + } + hmap_destroy(&mgr->controllers); + + HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { + ofservice_destroy(mgr, ofservice); + } + hmap_destroy(&mgr->services); + + for (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. + * The 'handle_openflow' callback must not free the message. */ +void +connmgr_run(struct connmgr *mgr, + void (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) +{ + struct ofconn *ofconn, *next_ofconn; + struct ofservice *ofservice; + size_t i; + + if (mgr->in_band) { + if (time_msec() >= mgr->next_in_band_update) { + update_in_band_remotes(mgr); + } + in_band_run(mgr->in_band); + } + + LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &mgr->all_conns) { + ofconn_run(ofconn, handle_openflow); + } + + /* 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); + } + + HMAP_FOR_EACH (ofservice, node, &mgr->services) { + struct vconn *vconn; + int retval; + + retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn); + if (!retval) { + struct rconn *rconn; + char *name; + + rconn = rconn_create(ofservice->probe_interval, 0); + name = ofconn_make_name(mgr, vconn_get_name(vconn)); + rconn_connect_unreliably(rconn, vconn, name); + free(name); + + ofconn = ofconn_create(mgr, rconn, OFCONN_SERVICE); + ofconn_set_rate_limit(ofconn, ofservice->rate_limit, + ofservice->burst_limit); + } else if (retval != EAGAIN) { + VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); + } + } + + for (i = 0; i < mgr->n_snoops; i++) { + struct vconn *vconn; + int retval; + + retval = pvconn_accept(mgr->snoops[i], OFP_VERSION, &vconn); + if (!retval) { + add_snooper(mgr, vconn); + } else if (retval != EAGAIN) { + VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); + } + } +} + +/* Causes the poll loop to wake up when connmgr_run() needs to run. */ +void +connmgr_wait(struct connmgr *mgr) +{ + struct ofservice *ofservice; + struct ofconn *ofconn; + size_t i; + + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + ofconn_wait(ofconn); + } + if (mgr->in_band) { + poll_timer_wait_until(mgr->next_in_band_update); + in_band_wait(mgr->in_band); + } + if (mgr->fail_open) { + fail_open_wait(mgr->fail_open); + } + HMAP_FOR_EACH (ofservice, node, &mgr->services) { + pvconn_wait(ofservice->pvconn); + } + for (i = 0; i < mgr->n_snoops; i++) { + pvconn_wait(mgr->snoops[i]); + } +} + +/* Returns the ofproto that owns 'ofconn''s connmgr. */ +struct ofproto * +ofconn_get_ofproto(const struct ofconn *ofconn) +{ + return ofconn->connmgr->ofproto; +} + +/* OpenFlow configuration. */ + +static void add_controller(struct connmgr *, const char *target); +static struct ofconn *find_controller_by_target(struct connmgr *, + const char *target); +static void update_fail_open(struct connmgr *); +static int set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, + const struct svec *); + +/* 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) +{ + return !hmap_is_empty(&mgr->controllers); +} + +/* 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) +{ + const struct ofconn *ofconn; + + shash_init(info); + + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + const struct rconn *rconn = ofconn->rconn; + time_t now = time_now(); + time_t last_connection = rconn_get_last_connection(rconn); + time_t last_disconnect = rconn_get_last_disconnect(rconn); + int last_error = rconn_get_last_error(rconn); + struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); + + shash_add(info, rconn_get_target(rconn), cinfo); + + cinfo->is_connected = rconn_is_connected(rconn); + cinfo->role = ofconn->role; + + cinfo->pairs.n = 0; + + if (last_error) { + cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; + cinfo->pairs.values[cinfo->pairs.n++] = + xstrdup(ovs_retval_to_string(last_error)); + } + + cinfo->pairs.keys[cinfo->pairs.n] = "state"; + cinfo->pairs.values[cinfo->pairs.n++] = + xstrdup(rconn_get_state(rconn)); + + if (last_connection != TIME_MIN) { + cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; + cinfo->pairs.values[cinfo->pairs.n++] + = xasprintf("%ld", (long int) (now - last_connection)); + } + + if (last_disconnect != TIME_MIN) { + cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; + cinfo->pairs.values[cinfo->pairs.n++] + = xasprintf("%ld", (long int) (now - last_disconnect)); + } + } +} + +/* Changes 'mgr''s set of controllers to the 'n_controllers' controllers in + * 'controllers'. */ +void +connmgr_set_controllers(struct connmgr *mgr, + const struct ofproto_controller *controllers, + size_t n_controllers) +{ + struct shash new_controllers; + struct ofconn *ofconn, *next_ofconn; + struct ofservice *ofservice, *next_ofservice; + bool ss_exists; + size_t i; + + /* Create newly configured controllers and services. + * Create a name to ofproto_controller mapping in 'new_controllers'. */ + shash_init(&new_controllers); + for (i = 0; i < n_controllers; i++) { + const struct ofproto_controller *c = &controllers[i]; + + if (!vconn_verify_name(c->target)) { + if (!find_controller_by_target(mgr, c->target)) { + add_controller(mgr, c->target); + } + } else if (!pvconn_verify_name(c->target)) { + if (!ofservice_lookup(mgr, c->target)) { + ofservice_create(mgr, c->target); + } + } else { + VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", + mgr->name, c->target); + continue; + } + + shash_add_once(&new_controllers, c->target, &controllers[i]); + } + + /* Delete controllers that are no longer configured. + * Update configuration of all now-existing controllers. */ + ss_exists = false; + HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &mgr->controllers) { + struct ofproto_controller *c; + + c = shash_find_data(&new_controllers, ofconn_get_target(ofconn)); + if (!c) { + ofconn_destroy(ofconn); + } else { + ofconn_reconfigure(ofconn, c); + } + } + + /* Delete services that are no longer configured. + * Update configuration of all now-existing services. */ + HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &mgr->services) { + struct ofproto_controller *c; + + c = shash_find_data(&new_controllers, + pvconn_get_name(ofservice->pvconn)); + if (!c) { + ofservice_destroy(mgr, ofservice); + } else { + ofservice_reconfigure(ofservice, c); + } + } + + shash_destroy(&new_controllers); + + update_in_band_remotes(mgr); + update_fail_open(mgr); +} + +/* 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, node, &mgr->all_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 svec *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 svec *snoops) +{ + size_t i; + + for (i = 0; i < mgr->n_snoops; i++) { + svec_add(snoops, pvconn_get_name(mgr->snoops[i])); + } +} + +/* Creates a new controller for 'target' in 'mgr'. update_controller() needs + * to be called later to finish the new ofconn's configuration. */ +static void +add_controller(struct connmgr *mgr, const char *target) +{ + char *name = ofconn_make_name(mgr, target); + struct ofconn *ofconn; + + ofconn = ofconn_create(mgr, rconn_create(5, 8), OFCONN_PRIMARY); + ofconn->pktbuf = pktbuf_create(); + ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN; + rconn_connect(ofconn->rconn, target, name); + hmap_insert(&mgr->controllers, &ofconn->hmap_node, hash_string(target, 0)); + + free(name); +} + +static struct ofconn * +find_controller_by_target(struct connmgr *mgr, const char *target) +{ + struct ofconn *ofconn; + + HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, + hash_string(target, 0), &mgr->controllers) { + if (!strcmp(ofconn_get_target(ofconn), target)) { + return ofconn; + } + } + return NULL; +} + +static void +update_in_band_remotes(struct connmgr *mgr) +{ + struct sockaddr_in *addrs; + size_t max_addrs, n_addrs; + struct ofconn *ofconn; + size_t i; + + /* Allocate enough memory for as many remotes as we could possibly have. */ + max_addrs = mgr->n_extra_remotes + hmap_count(&mgr->controllers); + addrs = xmalloc(max_addrs * sizeof *addrs); + n_addrs = 0; + + /* Add all the remotes. */ + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + struct sockaddr_in *sin = &addrs[n_addrs]; + + if (ofconn->band == OFPROTO_OUT_OF_BAND) { + continue; + } + + sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn); + if (sin->sin_addr.s_addr) { + sin->sin_port = rconn_get_remote_port(ofconn->rconn); + n_addrs++; + } + } + for (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); + } + if (mgr->in_band) { + in_band_set_remotes(mgr->in_band, addrs, n_addrs); + } + in_band_set_queue(mgr->in_band, mgr->in_band_queue); + mgr->next_in_band_update = time_msec() + 1000; + } else { + in_band_destroy(mgr->in_band); + mgr->in_band = NULL; + } + + /* Clean up. */ + free(addrs); +} + +static void +update_fail_open(struct connmgr *mgr) +{ + 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 { + fail_open_destroy(mgr->fail_open); + mgr->fail_open = NULL; + } +} + +static int +set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, + const struct svec *svec) +{ + struct pvconn **pvconns = *pvconnsp; + size_t n_pvconns = *n_pvconnsp; + int retval = 0; + size_t i; + + for (i = 0; i < n_pvconns; i++) { + pvconn_close(pvconns[i]); + } + free(pvconns); + + pvconns = xmalloc(svec->n * sizeof *pvconns); + n_pvconns = 0; + for (i = 0; i < svec->n; i++) { + const char *name = svec->names[i]; + struct pvconn *pvconn; + int error; + + error = pvconn_open(name, &pvconn); + if (!error) { + pvconns[n_pvconns++] = pvconn; + } else { + VLOG_ERR("failed to listen on %s: %s", name, strerror(error)); + if (!retval) { + retval = error; + } + } + } + + *pvconnsp = pvconns; + *n_pvconnsp = 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 ofconn *ofconn) +{ + switch (ofconn->role) { + case NX_ROLE_MASTER: + return 3; + case NX_ROLE_OTHER: + return 2; + case NX_ROLE_SLAVE: + return 1; + 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) +{ + struct ofconn *ofconn, *best; + + /* Pick a controller for monitoring. */ + best = NULL; + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + if (ofconn->type == OFCONN_PRIMARY + && (!best || snoop_preference(ofconn) > snoop_preference(best))) { + best = ofconn; + } + } + + 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; +} + +/* Returns the role configured for 'ofconn'. + * + * The default role, if no other role has been set, is NX_ROLE_OTHER. */ +enum nx_role +ofconn_get_role(const struct ofconn *ofconn) +{ + return ofconn->role; +} + +/* Changes 'ofconn''s role to 'role'. If 'role' is NX_ROLE_MASTER then any + * existing master is demoted to a slave. */ +void +ofconn_set_role(struct ofconn *ofconn, enum nx_role role) +{ + if (role == NX_ROLE_MASTER) { + struct ofconn *other; + + HMAP_FOR_EACH (other, hmap_node, &ofconn->connmgr->controllers) { + if (other->role == NX_ROLE_MASTER) { + other->role = NX_ROLE_SLAVE; + } + } + } + ofconn->role = role; +} + +/* Returns the currently configured flow format for 'ofconn', one of NXFF_*. + * + * The default, if no other format has been set, is NXFF_OPENFLOW10. */ +enum nx_flow_format +ofconn_get_flow_format(struct ofconn *ofconn) +{ + return ofconn->flow_format; +} + +/* Sets the flow format for 'ofconn' to 'flow_format' (one of NXFF_*). */ +void +ofconn_set_flow_format(struct ofconn *ofconn, enum nx_flow_format flow_format) +{ + ofconn->flow_format = flow_format; +} + +/* 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; +} + +/* 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); +} + +/* Same as pktbuf_retrieve(), using the pktbuf owned by 'ofconn'. */ +int +ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, + struct ofpbuf **bufferp, uint16_t *in_port) +{ + return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); +} + +/* Private ofconn functions. */ + +static const char * +ofconn_get_target(const struct ofconn *ofconn) +{ + return rconn_get_target(ofconn->rconn); +} + +static struct ofconn * +ofconn_create(struct connmgr *mgr, struct rconn *rconn, enum ofconn_type type) +{ + struct ofconn *ofconn = xzalloc(sizeof *ofconn); + ofconn->connmgr = mgr; + list_push_back(&mgr->all_conns, &ofconn->node); + ofconn->rconn = rconn; + ofconn->type = type; + ofconn->flow_format = NXFF_OPENFLOW10; + ofconn->role = NX_ROLE_OTHER; + ofconn->packet_in_counter = rconn_packet_counter_create (); + ofconn->pktbuf = NULL; + ofconn->miss_send_len = 0; + ofconn->reply_counter = rconn_packet_counter_create (); + return ofconn; +} + +static void +ofconn_destroy(struct ofconn *ofconn) +{ + if (ofconn->type == OFCONN_PRIMARY) { + hmap_remove(&ofconn->connmgr->controllers, &ofconn->hmap_node); + } + + list_remove(&ofconn->node); + rconn_destroy(ofconn->rconn); + rconn_packet_counter_destroy(ofconn->packet_in_counter); + rconn_packet_counter_destroy(ofconn->reply_counter); + pktbuf_destroy(ofconn->pktbuf); + free(ofconn); +} + +/* Reconfigures 'ofconn' to match 'c'. 'ofconn' and 'c' must have the same + * target. */ +static void +ofconn_reconfigure(struct ofconn *ofconn, const struct ofproto_controller *c) +{ + int probe_interval; + + ofconn->band = c->band; + + rconn_set_max_backoff(ofconn->rconn, c->max_backoff); + + probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; + rconn_set_probe_interval(ofconn->rconn, probe_interval); + + ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); +} + +static void +ofconn_run(struct ofconn *ofconn, + void (*handle_openflow)(struct ofconn *, struct ofpbuf *ofp_msg)) +{ + struct connmgr *mgr = ofconn->connmgr; + int iteration; + size_t i; + + for (i = 0; i < N_SCHEDULERS; i++) { + pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); + } + + rconn_run(ofconn->rconn); + + if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { + /* Limit the number of iterations to prevent other tasks from + * starving. */ + for (iteration = 0; iteration < 50; iteration++) { + struct ofpbuf *of_msg = rconn_recv(ofconn->rconn); + if (!of_msg) { + break; + } + if (mgr->fail_open) { + fail_open_maybe_recover(mgr->fail_open); + } + handle_openflow(ofconn, of_msg); + ofpbuf_delete(of_msg); + } + } + + if (!rconn_is_alive(ofconn->rconn)) { + ofconn_destroy(ofconn); + } +} + +static void +ofconn_wait(struct ofconn *ofconn) +{ + int i; + + for (i = 0; i < N_SCHEDULERS; i++) { + pinsched_wait(ofconn->schedulers[i]); + } + rconn_run_wait(ofconn->rconn); + if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { + rconn_recv_wait(ofconn->rconn); + } else { + COVERAGE_INC(ofconn_stuck); + } +} + +/* Returns true if 'ofconn' should receive asynchronous messages. */ +static bool +ofconn_receives_async_msgs(const struct ofconn *ofconn) +{ + if (!rconn_is_connected(ofconn->rconn)) { + return false; + } else if (ofconn->type == OFCONN_PRIMARY) { + /* Primary controllers always get asynchronous messages unless they + * have configured themselves as "slaves". */ + return ofconn->role != NX_ROLE_SLAVE; + } else { + /* Service connections don't get asynchronous messages unless they have + * explicitly asked for them by setting a nonzero miss send length. */ + return ofconn->miss_send_len > 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) +{ + int i; + + for (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) +{ + update_openflow_length(msg); + if (rconn_send(ofconn->rconn, msg, counter)) { + ofpbuf_delete(msg); + } +} + +/* Sending asynchronous messages. */ + +static void schedule_packet_in(struct ofconn *, const struct dpif_upcall *, + const struct flow *, struct ofpbuf *rw_packet); + +/* Sends an OFPT_PORT_STATUS message with 'opp' and 'reason' to appropriate + * controllers managed by 'mgr'. + * + * 'opp' is in *HOST* byte order. */ +void +connmgr_send_port_status(struct connmgr *mgr, const struct ofp_phy_port *opp, + uint8_t reason) +{ + /* XXX Should limit the number of queued port status change messages. */ + struct ofconn *ofconn; + + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + struct ofp_port_status *ops; + struct ofpbuf *b; + + /* Primary controllers, even slaves, should always get port status + updates. Otherwise obey ofconn_receives_async_msgs(). */ + if (ofconn->type != OFCONN_PRIMARY + && !ofconn_receives_async_msgs(ofconn)) { + continue; + } + + ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b); + ops->reason = reason; + ops->desc = *opp; + hton_ofp_phy_port(&ops->desc); + ofconn_send(ofconn, b, NULL); + } +} + +/* Sends an OFPT_FLOW_REMOVED or NXT_FLOW_REMOVED message based on 'fr' to + * appropriate controllers managed by 'mgr'. */ +void +connmgr_send_flow_removed(struct connmgr *mgr, + const struct ofputil_flow_removed *fr) +{ + struct ofconn *ofconn; + + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + struct ofpbuf *msg; + + if (!ofconn_receives_async_msgs(ofconn)) { + continue; + } + + /* 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.) */ + msg = ofputil_encode_flow_removed(fr, ofconn->flow_format); + ofconn_send_reply(ofconn, msg); + } +} + +/* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an + * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to + * their individual configurations. + * + * 'rw_packet' may be NULL. Otherwise, 'rw_packet' must contain the same data + * as upcall->packet. (rw_packet == upcall->packet is also valid.) Ownership + * of 'rw_packet' is transferred to this function. */ +void +connmgr_send_packet_in(struct connmgr *mgr, const struct dpif_upcall *upcall, + const struct flow *flow, struct ofpbuf *rw_packet) +{ + struct ofconn *ofconn, *prev; + + prev = NULL; + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + if (ofconn_receives_async_msgs(ofconn)) { + if (prev) { + schedule_packet_in(prev, upcall, flow, NULL); + } + prev = ofconn; + } + } + if (prev) { + schedule_packet_in(prev, upcall, flow, rw_packet); + } else { + ofpbuf_delete(rw_packet); + } +} + +/* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ +static void +do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) +{ + struct ofconn *ofconn = ofconn_; + + rconn_send_with_limit(ofconn->rconn, ofp_packet_in, + ofconn->packet_in_counter, 100); +} + +/* Takes 'upcall', whose packet has the flow specified by 'flow', composes an + * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet + * scheduler for sending. + * + * 'rw_packet' may be NULL. Otherwise, 'rw_packet' must contain the same data + * as upcall->packet. (rw_packet == upcall->packet is also valid.) Ownership + * of 'rw_packet' is transferred to this function. */ +static void +schedule_packet_in(struct ofconn *ofconn, const struct dpif_upcall *upcall, + const struct flow *flow, struct ofpbuf *rw_packet) +{ + struct connmgr *mgr = ofconn->connmgr; + struct ofputil_packet_in pin; + + /* Figure out the easy parts. */ + pin.packet = upcall->packet; + pin.in_port = odp_port_to_ofp_port(flow->in_port); + pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION; + + /* Get OpenFlow buffer_id. */ + if (upcall->type == DPIF_UC_ACTION) { + pin.buffer_id = UINT32_MAX; + } else if (mgr->fail_open && fail_open_is_active(mgr->fail_open)) { + pin.buffer_id = pktbuf_get_null(); + } else if (!ofconn->pktbuf) { + pin.buffer_id = UINT32_MAX; + } else { + pin.buffer_id = pktbuf_save(ofconn->pktbuf, upcall->packet, + flow->in_port); + } + + /* Figure out how much of the packet to send. */ + pin.send_len = upcall->packet->size; + if (pin.buffer_id != UINT32_MAX) { + pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); + } + if (upcall->type == DPIF_UC_ACTION) { + pin.send_len = MIN(pin.send_len, upcall->userdata); + } + + /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might + * immediately call into do_send_packet_in() or it might buffer it for a + * while (until a later call to pinsched_run()). */ + pinsched_send(ofconn->schedulers[upcall->type == DPIF_UC_MISS ? 0 : 1], + flow->in_port, ofputil_encode_packet_in(&pin, rw_packet), + do_send_packet_in, ofconn); +} + +/* 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) +{ + mgr->fail_mode = fail_mode; + update_fail_open(mgr); +} + +/* 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) +{ + const struct ofconn *ofconn; + int max_probe_interval; + + max_probe_interval = 0; + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + int probe_interval = rconn_get_probe_interval(ofconn->rconn); + max_probe_interval = MAX(max_probe_interval, probe_interval); + } + return max_probe_interval; +} + +/* Returns the number of seconds for which all of 'mgr's primary controllers + * have been disconnected. Returns 0 if 'mgr' has no primary controllers. */ +int +connmgr_failure_duration(const struct connmgr *mgr) +{ + const struct ofconn *ofconn; + int min_failure_duration; + + if (!connmgr_has_controllers(mgr)) { + return 0; + } + + min_failure_duration = INT_MAX; + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + int failure_duration = rconn_failure_duration(ofconn->rconn); + min_failure_duration = MIN(min_failure_duration, failure_duration); + } + return min_failure_duration; +} + +/* 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) +{ + const struct ofconn *ofconn; + + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + if (rconn_is_connected(ofconn->rconn)) { + 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; + + HMAP_FOR_EACH (ofconn, hmap_node, &mgr->controllers) { + if (rconn_is_admitted(ofconn->rconn)) { + return true; + } + } + return false; +} + +/* Sends 'packet' to each controller connected to 'mgr'. Takes ownership of + * 'packet'. */ +void +connmgr_broadcast(struct connmgr *mgr, struct ofpbuf *packet) +{ + struct ofconn *ofconn, *prev; + + prev = NULL; + LIST_FOR_EACH (ofconn, node, &mgr->all_conns) { + if (prev) { + ofconn_send_reply(ofconn, ofpbuf_clone(packet)); + } + if (rconn_is_connected(ofconn->rconn)) { + prev = ofconn; + } + } + if (prev) { + ofconn_send_reply(ofconn, packet); + } else { + ofpbuf_delete(packet); + } +} + +/* 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) +{ + size_t i; + + if (n != mgr->n_extra_remotes) { + return true; + } + + for (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_msg_in_hook(struct connmgr *mgr, const struct flow *flow, + const struct ofpbuf *packet) +{ + return mgr->in_band && in_band_msg_in_hook(mgr->in_band, flow, packet); +} + +bool +connmgr_may_set_up_flow(struct connmgr *mgr, const struct flow *flow, + const struct nlattr *odp_actions, + size_t actions_len) +{ + return !mgr->in_band || in_band_rule_check(flow, odp_actions, actions_len); +} + +/* Fail-open and in-band implementation. */ + +/* Called by 'ofproto' after all flows have been flushed, to allow fail-open + * and in-band control to re-create their flows. */ +void +connmgr_flushed(struct connmgr *mgr) +{ + if (mgr->in_band) { + in_band_flushed(mgr->in_band); + } + if (mgr->fail_open) { + fail_open_flushed(mgr->fail_open); + } +} + +/* Creates a new ofservice for 'target' in 'mgr'. Returns 0 if successful, + * otherwise a positive errno value. + * + * ofservice_reconfigure() must be called to fully configure the new + * ofservice. */ +static int +ofservice_create(struct connmgr *mgr, const char *target) +{ + struct ofservice *ofservice; + struct pvconn *pvconn; + int error; + + error = pvconn_open(target, &pvconn); + if (error) { + return error; + } + + ofservice = xzalloc(sizeof *ofservice); + hmap_insert(&mgr->services, &ofservice->node, hash_string(target, 0)); + ofservice->pvconn = pvconn; + + return 0; +} + +static void +ofservice_destroy(struct connmgr *mgr, struct ofservice *ofservice) +{ + hmap_remove(&mgr->services, &ofservice->node); + pvconn_close(ofservice->pvconn); + free(ofservice); +} + +static void +ofservice_reconfigure(struct ofservice *ofservice, + const struct ofproto_controller *c) +{ + ofservice->probe_interval = c->probe_interval; + ofservice->rate_limit = c->rate_limit; + ofservice->burst_limit = c->burst_limit; +} + +/* 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, node, hash_string(target, 0), + &mgr->services) { + if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { + return ofservice; + } + } + return NULL; +} diff --git a/ofproto/connmgr.h b/ofproto/connmgr.h new file mode 100644 index 00000000..4710e6da --- /dev/null +++ b/ofproto/connmgr.h @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2009, 2010, 2011 Nicira Networks. + * + * 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. + */ + +#ifndef CONNMGR_H +#define CONNMGR_H 1 + +#include "hmap.h" +#include "list.h" +#include "ofproto.h" +#include "openflow/nicira-ext.h" +#include "openvswitch/types.h" + +struct dpif_upcall; +struct ofconn; +struct ofputil_flow_removed; + +/* ofproto supports two kinds of OpenFlow connections: + * + * - "Primary" connections to ordinary OpenFlow controllers. ofproto + * maintains persistent connections to these controllers and by default + * sends them asynchronous messages such as packet-ins. + * + * - "Service" connections, e.g. from ovs-ofctl. When these connections + * drop, it is the other side's responsibility to reconnect them if + * necessary. ofproto does not send them asynchronous messages by default. + * + * Currently, active (tcp, ssl, unix) connections are always "primary" + * connections and passive (ptcp, pssl, punix) connections are always "service" + * connections. There is no inherent reason for this, but it reflects the + * common case. + */ +enum ofconn_type { + OFCONN_PRIMARY, /* An ordinary OpenFlow controller. */ + OFCONN_SERVICE /* A service connection, e.g. "ovs-ofctl". */ +}; + +/* Basics. */ +struct connmgr *connmgr_create(struct ofproto *ofproto, + const char *dpif_name, const char *local_name); +void connmgr_destroy(struct connmgr *); + +void connmgr_run(struct connmgr *, + void (*handle_openflow)(struct ofconn *, + struct ofpbuf *ofp_msg)); +void connmgr_wait(struct connmgr *); + +struct ofproto *ofconn_get_ofproto(const struct ofconn *); + +/* OpenFlow configuration. */ +bool connmgr_has_controllers(const struct connmgr *); +void connmgr_get_controller_info(struct connmgr *, struct shash *); +void connmgr_set_controllers(struct connmgr *, + const struct ofproto_controller[], size_t n); +void connmgr_reconnect(const struct connmgr *); + +int connmgr_set_snoops(struct connmgr *, const struct svec *snoops); +void connmgr_get_snoops(const struct connmgr *, struct svec *snoops); + +/* Individual connections to OpenFlow controllers. */ +enum ofconn_type ofconn_get_type(const struct ofconn *); + +enum nx_role ofconn_get_role(const struct ofconn *); +void ofconn_set_role(struct ofconn *, enum nx_role); + +enum nx_flow_format ofconn_get_flow_format(struct ofconn *); +void ofconn_set_flow_format(struct ofconn *, enum nx_flow_format); + +int ofconn_get_miss_send_len(const struct ofconn *); +void ofconn_set_miss_send_len(struct ofconn *, int miss_send_len); + +void ofconn_send_reply(const struct ofconn *, struct ofpbuf *); + +int ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id, + struct ofpbuf **bufferp, uint16_t *in_port); + +/* Sending asynchronous messages. */ +void connmgr_send_port_status(struct connmgr *, const struct ofp_phy_port *, + uint8_t reason); +void connmgr_send_flow_removed(struct connmgr *, + const struct ofputil_flow_removed *); +void connmgr_send_packet_in(struct connmgr *, const struct dpif_upcall *, + const struct flow *, struct ofpbuf *rw_packet); + +/* Fail-open settings. */ +enum ofproto_fail_mode connmgr_get_fail_mode(const struct connmgr *); +void connmgr_set_fail_mode(struct connmgr *, enum ofproto_fail_mode); + +/* Fail-open implementation. */ +int connmgr_get_max_probe_interval(const struct connmgr *); +bool connmgr_is_any_controller_connected(const struct connmgr *); +bool connmgr_is_any_controller_admitted(const struct connmgr *); +int connmgr_failure_duration(const struct connmgr *); +void connmgr_broadcast(struct connmgr *, struct ofpbuf *); + +/* In-band configuration. */ +void connmgr_set_extra_in_band_remotes(struct connmgr *, + const struct sockaddr_in *, size_t); +void connmgr_set_in_band_queue(struct connmgr *, int queue_id); + +/* In-band implementation. */ +bool connmgr_msg_in_hook(struct connmgr *, const struct flow *, + const struct ofpbuf *packet); +bool connmgr_may_set_up_flow(struct connmgr *, const struct flow *, + const struct nlattr *odp_actions, + size_t actions_len); + +/* Fail-open and in-band implementation. */ +void connmgr_flushed(struct connmgr *); + +#endif /* connmgr.h */ diff --git a/ofproto/fail-open.c b/ofproto/fail-open.c index 97fee3eb..bf57b9fc 100644 --- a/ofproto/fail-open.c +++ b/ofproto/fail-open.c @@ -19,6 +19,7 @@ #include #include #include "classifier.h" +#include "connmgr.h" #include "flow.h" #include "mac-learning.h" #include "odp-util.h" @@ -69,8 +70,7 @@ VLOG_DEFINE_THIS_MODULE(fail_open); struct fail_open { struct ofproto *ofproto; - struct rconn **controllers; - size_t n_controllers; + struct connmgr *connmgr; int last_disconn_secs; long long int next_bogus_packet_in; struct rconn_packet_counter *bogus_packet_counter; @@ -83,7 +83,7 @@ static void fail_open_recover(struct fail_open *); static int trigger_duration(const struct fail_open *fo) { - if (!fo->n_controllers) { + if (!connmgr_has_controllers(fo->connmgr)) { /* Shouldn't ever arrive here, but if we do, never fail open. */ return INT_MAX; } else { @@ -100,36 +100,8 @@ trigger_duration(const struct fail_open *fo) * - The third interval is the time allowed to reconnect after no * response is received. */ - int max_probe_interval; - size_t i; - - max_probe_interval = 0; - for (i = 0; i < fo->n_controllers; i++) { - int probe_interval = rconn_get_probe_interval(fo->controllers[i]); - max_probe_interval = MAX(max_probe_interval, probe_interval); - } - return max_probe_interval * 3; - } -} - -/* Returns the number of seconds for which all controllers have been - * disconnected. */ -static int -failure_duration(const struct fail_open *fo) -{ - int min_failure_duration; - size_t i; - - if (!fo->n_controllers) { - return 0; - } - - min_failure_duration = INT_MAX; - for (i = 0; i < fo->n_controllers; i++) { - int failure_duration = rconn_failure_duration(fo->controllers[i]); - min_failure_duration = MIN(min_failure_duration, failure_duration); + return connmgr_get_max_probe_interval(fo->connmgr) * 3; } - return min_failure_duration; } /* Returns true if 'fo' is currently in fail-open mode, otherwise false. */ @@ -139,39 +111,8 @@ fail_open_is_active(const struct fail_open *fo) return fo->last_disconn_secs != 0; } -/* Returns true if at least one controller is connected (regardless of whether - * those controllers are believed to have authenticated and accepted this - * switch), false if none of them are connected. */ -static bool -any_controller_is_connected(const struct fail_open *fo) -{ - size_t i; - - for (i = 0; i < fo->n_controllers; i++) { - if (rconn_is_connected(fo->controllers[i])) { - return true; - } - } - return false; -} - -/* Returns true if at least one controller is believed to have authenticated - * and accepted this switch, false otherwise. */ -static bool -any_controller_is_admitted(const struct fail_open *fo) -{ - size_t i; - - for (i = 0; i < fo->n_controllers; i++) { - if (rconn_is_admitted(fo->controllers[i])) { - return true; - } - } - return false; -} - static void -send_bogus_packet_in(struct fail_open *fo, struct rconn *rconn) +send_bogus_packet_ins(struct fail_open *fo) { uint8_t mac[ETH_ADDR_LEN]; struct ofpbuf *opi; @@ -185,26 +126,14 @@ send_bogus_packet_in(struct fail_open *fo, struct rconn *rconn) ofpbuf_uninit(&b); /* Send. */ - rconn_send_with_limit(rconn, opi, fo->bogus_packet_counter, 1); -} - -static void -send_bogus_packet_ins(struct fail_open *fo) -{ - size_t i; - - for (i = 0; i < fo->n_controllers; i++) { - if (rconn_is_connected(fo->controllers[i])) { - send_bogus_packet_in(fo, fo->controllers[i]); - } - } + connmgr_broadcast(fo->connmgr, opi); } /* Enter fail-open mode if we should be in it. */ void fail_open_run(struct fail_open *fo) { - int disconn_secs = failure_duration(fo); + int disconn_secs = connmgr_failure_duration(fo->connmgr); /* Enter fail-open mode if 'fo' is not in it but should be. */ if (disconn_secs >= trigger_duration(fo)) { @@ -227,7 +156,7 @@ fail_open_run(struct fail_open *fo) /* Schedule a bogus packet-in if we're connected and in fail-open. */ if (fail_open_is_active(fo)) { - if (any_controller_is_connected(fo)) { + if (connmgr_is_any_controller_connected(fo->connmgr)) { bool expired = time_msec() >= fo->next_bogus_packet_in; if (expired) { send_bogus_packet_ins(fo); @@ -247,7 +176,8 @@ fail_open_run(struct fail_open *fo) void fail_open_maybe_recover(struct fail_open *fo) { - if (any_controller_is_admitted(fo)) { + if (fail_open_is_active(fo) + && connmgr_is_any_controller_admitted(fo->connmgr)) { fail_open_recover(fo); } } @@ -255,16 +185,14 @@ fail_open_maybe_recover(struct fail_open *fo) static void fail_open_recover(struct fail_open *fo) { - if (fail_open_is_active(fo)) { - struct cls_rule rule; + struct cls_rule rule; - VLOG_WARN("No longer in fail-open mode"); - fo->last_disconn_secs = 0; - fo->next_bogus_packet_in = LLONG_MAX; + VLOG_WARN("No longer in fail-open mode"); + fo->last_disconn_secs = 0; + fo->next_bogus_packet_in = LLONG_MAX; - cls_rule_init_catchall(&rule, FAIL_OPEN_PRIORITY); - ofproto_delete_flow(fo->ofproto, &rule); - } + cls_rule_init_catchall(&rule, FAIL_OPEN_PRIORITY); + ofproto_delete_flow(fo->ofproto, &rule); } void @@ -278,7 +206,7 @@ fail_open_wait(struct fail_open *fo) void fail_open_flushed(struct fail_open *fo) { - int disconn_secs = failure_duration(fo); + int disconn_secs = connmgr_failure_duration(fo->connmgr); bool open = disconn_secs >= trigger_duration(fo); if (open) { union ofp_action action; @@ -296,47 +224,28 @@ fail_open_flushed(struct fail_open *fo) } } -/* Creates and returns a new struct fail_open for 'ofproto'. - * - * The caller should register its set of controllers with - * fail_open_set_controllers(). (There should be at least one controller, - * otherwise there isn't any point in having the struct fail_open around.) */ +/* Creates and returns a new struct fail_open for 'ofproto' and 'mgr'. */ struct fail_open * -fail_open_create(struct ofproto *ofproto) +fail_open_create(struct ofproto *ofproto, struct connmgr *mgr) { struct fail_open *fo = xmalloc(sizeof *fo); fo->ofproto = ofproto; - fo->controllers = NULL; - fo->n_controllers = 0; + fo->connmgr = mgr; fo->last_disconn_secs = 0; fo->next_bogus_packet_in = LLONG_MAX; fo->bogus_packet_counter = rconn_packet_counter_create(); return fo; } -/* Registers the 'n' rconns in 'rconns' as connections to the controller for - * 'fo'. The caller must ensure that all of the rconns remain valid until 'fo' - * is destroyed or a new set is registered in a subsequent call. - * - * Takes ownership of the 'rconns' array, but not of the rconns that it points - * to (of which the caller retains ownership). */ -void -fail_open_set_controllers(struct fail_open *fo, - struct rconn **rconns, size_t n) -{ - free(fo->controllers); - fo->controllers = rconns; - fo->n_controllers = n; -} - /* Destroys 'fo'. */ void fail_open_destroy(struct fail_open *fo) { if (fo) { - fail_open_recover(fo); - free(fo->controllers); - /* We don't own the rconns behind fo->controllers. */ + if (fail_open_is_active(fo)) { + fail_open_recover(fo); + } + /* We don't own fo->connmgr. */ rconn_packet_counter_destroy(fo->bogus_packet_counter); free(fo); } diff --git a/ofproto/fail-open.h b/ofproto/fail-open.h index 2d0424de..51fa0b96 100644 --- a/ofproto/fail-open.h +++ b/ofproto/fail-open.h @@ -21,9 +21,9 @@ #include #include "flow.h" +struct connmgr; struct fail_open; struct ofproto; -struct rconn; /* Priority of the rule added by the fail-open subsystem when a switch enters * fail-open mode. This priority value uniquely identifies a fail-open flow @@ -31,8 +31,7 @@ struct rconn; * creates flows with this priority). And "f0" is mnemonic for "fail open"! */ #define FAIL_OPEN_PRIORITY 0xf0f0f0 -struct fail_open *fail_open_create(struct ofproto *); -void fail_open_set_controllers(struct fail_open *, struct rconn **, size_t n); +struct fail_open *fail_open_create(struct ofproto *, struct connmgr *); void fail_open_destroy(struct fail_open *); void fail_open_wait(struct fail_open *); bool fail_open_is_active(const struct fail_open *); diff --git a/ofproto/in-band.c b/ofproto/in-band.c index a001baf6..e75d19ea 100644 --- a/ofproto/in-band.c +++ b/ofproto/in-band.c @@ -377,10 +377,6 @@ bool in_band_msg_in_hook(struct in_band *in_band, const struct flow *flow, const struct ofpbuf *packet) { - if (!in_band) { - return false; - } - /* Regardless of how the flow table is configured, we want to be * able to see replies to our DHCP requests. */ if (flow->dl_type == htons(ETH_TYPE_IP) @@ -409,13 +405,9 @@ in_band_msg_in_hook(struct in_band *in_band, const struct flow *flow, /* Returns true if the rule that would match 'flow' with 'actions' is * allowed to be set up in the datapath. */ bool -in_band_rule_check(struct in_band *in_band, const struct flow *flow, +in_band_rule_check(const struct flow *flow, const struct nlattr *actions, size_t actions_len) { - if (!in_band) { - return true; - } - /* Don't allow flows that would prevent DHCP replies from being seen * by the local port. */ if (flow->dl_type == htons(ETH_TYPE_IP) @@ -684,23 +676,14 @@ in_band_flushed(struct in_band *in_band) } int -in_band_create(struct ofproto *ofproto, struct dpif *dpif, +in_band_create(struct ofproto *ofproto, const char *local_name, struct in_band **in_bandp) { struct in_band *in_band; - char local_name[IF_NAMESIZE]; struct netdev *local_netdev; int error; *in_bandp = NULL; - error = dpif_port_get_name(dpif, ODPP_LOCAL, - local_name, sizeof local_name); - if (error) { - VLOG_ERR("failed to initialize in-band control: cannot get name " - "of datapath local port (%s)", strerror(error)); - return error; - } - error = netdev_open_default(local_name, &local_netdev); if (error) { VLOG_ERR("failed to initialize in-band control: cannot open " diff --git a/ofproto/in-band.h b/ofproto/in-band.h index 701da00e..5fa3666c 100644 --- a/ofproto/in-band.h +++ b/ofproto/in-band.h @@ -17,15 +17,18 @@ #ifndef IN_BAND_H #define IN_BAND_H 1 -#include "flow.h" +#include +#include +#include -struct dpif; +struct flow; struct in_band; +struct nlattr; +struct ofpbuf; struct ofproto; -struct rconn; -struct settings; -int in_band_create(struct ofproto *, struct dpif *, struct in_band **); +int in_band_create(struct ofproto *, const char *local_name, + struct in_band **); void in_band_destroy(struct in_band *); void in_band_set_queue(struct in_band *, int queue_id); @@ -37,9 +40,8 @@ void in_band_wait(struct in_band *); bool in_band_msg_in_hook(struct in_band *, const struct flow *, const struct ofpbuf *packet); -bool in_band_rule_check(struct in_band *, const struct flow *, - const struct nlattr *odp_actions, - size_t actions_len); +bool in_band_rule_check(const struct flow *, + const struct nlattr *odp_actions, size_t actions_len); void in_band_flushed(struct in_band *); #endif /* in-band.h */ diff --git a/ofproto/ofproto.c b/ofproto/ofproto.c index 25a9db68..ce8c99bd 100644 --- a/ofproto/ofproto.c +++ b/ofproto/ofproto.c @@ -27,6 +27,7 @@ #include "byte-order.h" #include "cfm.h" #include "classifier.h" +#include "connmgr.h" #include "coverage.h" #include "dpif.h" #include "dynamic-string.h" @@ -79,7 +80,6 @@ COVERAGE_DEFINE(ofproto_flows_req); COVERAGE_DEFINE(ofproto_flush); COVERAGE_DEFINE(ofproto_invalidated); COVERAGE_DEFINE(ofproto_no_packet_in); -COVERAGE_DEFINE(ofproto_ofconn_stuck); COVERAGE_DEFINE(ofproto_ofp2odp); COVERAGE_DEFINE(ofproto_packet_in); COVERAGE_DEFINE(ofproto_packet_out); @@ -270,107 +270,8 @@ static void facet_update_stats(struct ofproto *, struct facet *, const struct dpif_flow_stats *); static void facet_push_stats(struct ofproto *, struct facet *); -/* ofproto supports two kinds of OpenFlow connections: - * - * - "Primary" connections to ordinary OpenFlow controllers. ofproto - * maintains persistent connections to these controllers and by default - * sends them asynchronous messages such as packet-ins. - * - * - "Service" connections, e.g. from ovs-ofctl. When these connections - * drop, it is the other side's responsibility to reconnect them if - * necessary. ofproto does not send them asynchronous messages by default. - * - * Currently, active (tcp, ssl, unix) connections are always "primary" - * connections and passive (ptcp, pssl, punix) connections are always "service" - * connections. There is no inherent reason for this, but it reflects the - * common case. - */ -enum ofconn_type { - OFCONN_PRIMARY, /* An ordinary OpenFlow controller. */ - OFCONN_SERVICE /* A service connection, e.g. "ovs-ofctl". */ -}; - -/* A listener for incoming OpenFlow "service" connections. */ -struct ofservice { - struct hmap_node node; /* In struct ofproto's "services" hmap. */ - struct pvconn *pvconn; /* OpenFlow connection listener. */ - - /* These are not used by ofservice directly. They are settings for - * accepted "struct ofconn"s from the pvconn. */ - int probe_interval; /* Max idle time before probing, in seconds. */ - int rate_limit; /* Max packet-in rate in packets per second. */ - int burst_limit; /* Limit on accumulating packet credits. */ -}; - -static struct ofservice *ofservice_lookup(struct ofproto *, - const char *target); -static int ofservice_create(struct ofproto *, - const struct ofproto_controller *); -static void ofservice_reconfigure(struct ofservice *, - const struct ofproto_controller *); -static void ofservice_destroy(struct ofproto *, struct ofservice *); - -/* An OpenFlow connection. */ -struct ofconn { - struct ofproto *ofproto; /* The ofproto that owns this connection. */ - struct list node; /* In struct ofproto's "all_conns" list. */ - struct rconn *rconn; /* OpenFlow connection. */ - enum ofconn_type type; /* Type. */ - enum nx_flow_format flow_format; /* Currently selected flow format. */ - - /* OFPT_PACKET_IN related data. */ - struct rconn_packet_counter *packet_in_counter; /* # queued on 'rconn'. */ -#define N_SCHEDULERS 2 - struct pinsched *schedulers[N_SCHEDULERS]; - struct pktbuf *pktbuf; /* OpenFlow packet buffers. */ - int miss_send_len; /* Bytes to send of buffered packets. */ - - /* 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; - - /* type == OFCONN_PRIMARY only. */ - enum nx_role role; /* Role. */ - struct hmap_node hmap_node; /* In struct ofproto's "controllers" map. */ - enum ofproto_band band; /* In-band or out-of-band? */ -}; - - -static struct ofconn *ofconn_create(struct ofproto *, struct rconn *, - enum ofconn_type); -static void ofconn_destroy(struct ofconn *); -static void ofconn_run(struct ofconn *); -static void ofconn_wait(struct ofconn *); - -static bool ofconn_receives_async_msgs(const struct ofconn *); -static char *ofconn_make_name(const struct ofproto *, const char *target); -static void ofconn_set_rate_limit(struct ofconn *, int rate, int burst); - -static struct ofproto *ofconn_get_ofproto(struct ofconn *); - -static enum nx_flow_format ofconn_get_flow_format(struct ofconn *); -static void ofconn_set_flow_format(struct ofconn *, enum nx_flow_format); - -static int ofconn_get_miss_send_len(const struct ofconn *); -static void ofconn_set_miss_send_len(struct ofconn *, int miss_send_len); - -static enum ofconn_type ofconn_get_type(const struct ofconn *); - -static enum nx_role ofconn_get_role(const struct ofconn *); -static void ofconn_set_role(struct ofconn *, enum nx_role); - -static int ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id, - struct ofpbuf **bufferp, uint16_t *in_port); - - -static void queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn, - struct rconn_packet_counter *counter); - static void send_packet_in(struct ofproto *, struct dpif_upcall *, const struct flow *, bool clone); -static void do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn); struct ofproto { /* Settings. */ @@ -390,17 +291,9 @@ struct ofproto { uint32_t max_ports; /* Configuration. */ - struct fail_open *fail_open; struct netflow *netflow; struct ofproto_sflow *sflow; - /* In-band control. */ - struct in_band *in_band; - long long int next_in_band_update; - struct sockaddr_in *extra_in_band_remotes; - size_t n_extra_remotes; - int in_band_queue; - /* Flow table. */ struct classifier cls; long long int next_expiration; @@ -411,14 +304,7 @@ struct ofproto { struct tag_set revalidate_set; /* OpenFlow connections. */ - struct hmap controllers; /* Controller "struct ofconn"s. */ - struct list all_conns; /* Contains "struct ofconn"s. */ - enum ofproto_fail_mode fail_mode; - - /* OpenFlow listeners. */ - struct hmap services; /* Contains "struct ofservice"s. */ - struct pvconn **snoops; - size_t n_snoops; + struct connmgr *connmgr; /* Hooks for ovs-vswitchd. */ const struct ofhooks *ofhooks; @@ -459,6 +345,7 @@ ofproto_create(const char *datapath, const char *datapath_type, const struct ofhooks *ofhooks, void *aux, struct ofproto **ofprotop) { + char local_name[IF_NAMESIZE]; struct ofproto *p; struct dpif *dpif; int error; @@ -486,6 +373,14 @@ ofproto_create(const char *datapath, const char *datapath_type, dpif_flow_flush(dpif); dpif_recv_purge(dpif); + error = dpif_port_get_name(dpif, ODPP_LOCAL, + local_name, sizeof local_name); + if (error) { + VLOG_ERR("%s: cannot get name of datapath local port (%s)", + datapath, strerror(error)); + return error; + } + /* Initialize settings. */ p = xzalloc(sizeof *p); p->fallback_dpid = pick_fallback_dpid(); @@ -504,14 +399,9 @@ ofproto_create(const char *datapath, const char *datapath_type, p->max_ports = dpif_get_max_ports(dpif); /* Initialize submodules. */ - p->fail_open = NULL; p->netflow = NULL; p->sflow = NULL; - /* Initialize in-band control. */ - p->in_band = NULL; - p->in_band_queue = -1; - /* Initialize flow table. */ classifier_init(&p->cls); p->next_expiration = time_msec() + 1000; @@ -521,13 +411,6 @@ ofproto_create(const char *datapath, const char *datapath_type, p->need_revalidate = false; tag_set_init(&p->revalidate_set); - /* Initialize OpenFlow connections. */ - list_init(&p->all_conns); - hmap_init(&p->controllers); - hmap_init(&p->services); - p->snoops = NULL; - p->n_snoops = 0; - /* Initialize hooks. */ if (ofhooks) { p->ofhooks = ofhooks; @@ -545,6 +428,9 @@ ofproto_create(const char *datapath, const char *datapath_type, shash_add_once(&all_ofprotos, dpif_name(p->dpif), p); + /* Initialize OpenFlow connections. */ + p->connmgr = connmgr_create(p, datapath, local_name); + *ofprotop = p; return 0; } @@ -563,212 +449,18 @@ ofproto_set_datapath_id(struct ofproto *p, uint64_t datapath_id) } } -/* Creates a new controller in 'ofproto'. Some of the settings are initially - * drawn from 'c', but update_controller() needs to be called later to finish - * the new ofconn's configuration. */ -static void -add_controller(struct ofproto *ofproto, const struct ofproto_controller *c) -{ - char *name = ofconn_make_name(ofproto, c->target); - struct ofconn *ofconn; - - ofconn = ofconn_create(ofproto, rconn_create(5, 8), OFCONN_PRIMARY); - ofconn->pktbuf = pktbuf_create(); - ofconn->miss_send_len = OFP_DEFAULT_MISS_SEND_LEN; - rconn_connect(ofconn->rconn, c->target, name); - hmap_insert(&ofproto->controllers, &ofconn->hmap_node, - hash_string(c->target, 0)); - - free(name); -} - -/* Reconfigures 'ofconn' to match 'c'. This function cannot update an ofconn's - * target (this is done by creating new ofconns and deleting old ones), but it - * can update the rest of an ofconn's settings. */ -static void -update_controller(struct ofconn *ofconn, const struct ofproto_controller *c) -{ - int probe_interval; - - ofconn->band = c->band; - - rconn_set_max_backoff(ofconn->rconn, c->max_backoff); - - probe_interval = c->probe_interval ? MAX(c->probe_interval, 5) : 0; - rconn_set_probe_interval(ofconn->rconn, probe_interval); - - ofconn_set_rate_limit(ofconn, c->rate_limit, c->burst_limit); -} - -static const char * -ofconn_get_target(const struct ofconn *ofconn) -{ - return rconn_get_target(ofconn->rconn); -} - -static struct ofconn * -find_controller_by_target(struct ofproto *ofproto, const char *target) -{ - struct ofconn *ofconn; - - HMAP_FOR_EACH_WITH_HASH (ofconn, hmap_node, - hash_string(target, 0), &ofproto->controllers) { - if (!strcmp(ofconn_get_target(ofconn), target)) { - return ofconn; - } - } - return NULL; -} - -static void -update_in_band_remotes(struct ofproto *ofproto) -{ - const struct ofconn *ofconn; - struct sockaddr_in *addrs; - size_t max_addrs, n_addrs; - size_t i; - - /* Allocate enough memory for as many remotes as we could possibly have. */ - max_addrs = ofproto->n_extra_remotes + hmap_count(&ofproto->controllers); - addrs = xmalloc(max_addrs * sizeof *addrs); - n_addrs = 0; - - /* Add all the remotes. */ - HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) { - struct sockaddr_in *sin = &addrs[n_addrs]; - - if (ofconn->band == OFPROTO_OUT_OF_BAND) { - continue; - } - - sin->sin_addr.s_addr = rconn_get_remote_ip(ofconn->rconn); - if (sin->sin_addr.s_addr) { - sin->sin_port = rconn_get_remote_port(ofconn->rconn); - n_addrs++; - } - } - for (i = 0; i < ofproto->n_extra_remotes; i++) { - addrs[n_addrs++] = ofproto->extra_in_band_remotes[i]; - } - - /* Create or update or destroy in-band. */ - if (n_addrs) { - if (!ofproto->in_band) { - in_band_create(ofproto, ofproto->dpif, &ofproto->in_band); - } - if (ofproto->in_band) { - in_band_set_remotes(ofproto->in_band, addrs, n_addrs); - } - in_band_set_queue(ofproto->in_band, ofproto->in_band_queue); - ofproto->next_in_band_update = time_msec() + 1000; - } else { - in_band_destroy(ofproto->in_band); - ofproto->in_band = NULL; - } - - /* Clean up. */ - free(addrs); -} - -static void -update_fail_open(struct ofproto *p) -{ - struct ofconn *ofconn; - - if (!hmap_is_empty(&p->controllers) - && p->fail_mode == OFPROTO_FAIL_STANDALONE) { - struct rconn **rconns; - size_t n; - - if (!p->fail_open) { - p->fail_open = fail_open_create(p); - } - - n = 0; - rconns = xmalloc(hmap_count(&p->controllers) * sizeof *rconns); - HMAP_FOR_EACH (ofconn, hmap_node, &p->controllers) { - rconns[n++] = ofconn->rconn; - } - - fail_open_set_controllers(p->fail_open, rconns, n); - /* p->fail_open takes ownership of 'rconns'. */ - } else { - fail_open_destroy(p->fail_open); - p->fail_open = NULL; - } -} - void ofproto_set_controllers(struct ofproto *p, const struct ofproto_controller *controllers, size_t n_controllers) { - struct shash new_controllers; - struct ofconn *ofconn, *next_ofconn; - struct ofservice *ofservice, *next_ofservice; - size_t i; - - /* Create newly configured controllers and services. - * Create a name to ofproto_controller mapping in 'new_controllers'. */ - shash_init(&new_controllers); - for (i = 0; i < n_controllers; i++) { - const struct ofproto_controller *c = &controllers[i]; - - if (!vconn_verify_name(c->target)) { - if (!find_controller_by_target(p, c->target)) { - add_controller(p, c); - } - } else if (!pvconn_verify_name(c->target)) { - if (!ofservice_lookup(p, c->target) && ofservice_create(p, c)) { - continue; - } - } else { - VLOG_WARN_RL(&rl, "%s: unsupported controller \"%s\"", - dpif_name(p->dpif), c->target); - continue; - } - - shash_add_once(&new_controllers, c->target, &controllers[i]); - } - - /* Delete controllers that are no longer configured. - * Update configuration of all now-existing controllers. */ - HMAP_FOR_EACH_SAFE (ofconn, next_ofconn, hmap_node, &p->controllers) { - struct ofproto_controller *c; - - c = shash_find_data(&new_controllers, ofconn_get_target(ofconn)); - if (!c) { - ofconn_destroy(ofconn); - } else { - update_controller(ofconn, c); - } - } - - /* Delete services that are no longer configured. - * Update configuration of all now-existing services. */ - HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) { - struct ofproto_controller *c; - - c = shash_find_data(&new_controllers, - pvconn_get_name(ofservice->pvconn)); - if (!c) { - ofservice_destroy(p, ofservice); - } else { - ofservice_reconfigure(ofservice, c); - } - } - - shash_destroy(&new_controllers); - - update_in_band_remotes(p); - update_fail_open(p); + connmgr_set_controllers(p->connmgr, controllers, n_controllers); } void ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode) { - p->fail_mode = fail_mode; - update_fail_open(p); + connmgr_set_fail_mode(p->connmgr, fail_mode); } /* Drops the connections between 'ofproto' and all of its controllers, forcing @@ -776,34 +468,7 @@ ofproto_set_fail_mode(struct ofproto *p, enum ofproto_fail_mode fail_mode) void ofproto_reconnect_controllers(struct ofproto *ofproto) { - struct ofconn *ofconn; - - LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) { - rconn_reconnect(ofconn->rconn); - } -} - -static bool -any_extras_changed(const struct ofproto *ofproto, - const struct sockaddr_in *extras, size_t n) -{ - size_t i; - - if (n != ofproto->n_extra_remotes) { - return true; - } - - for (i = 0; i < n; i++) { - const struct sockaddr_in *old = &ofproto->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; + connmgr_reconnect(ofproto->connmgr); } /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s @@ -813,15 +478,7 @@ void ofproto_set_extra_in_band_remotes(struct ofproto *ofproto, const struct sockaddr_in *extras, size_t n) { - if (!any_extras_changed(ofproto, extras, n)) { - return; - } - - free(ofproto->extra_in_band_remotes); - ofproto->n_extra_remotes = n; - ofproto->extra_in_band_remotes = xmemdup(extras, n * sizeof *extras); - - update_in_band_remotes(ofproto); + connmgr_set_extra_in_band_remotes(ofproto->connmgr, extras, n); } /* Sets the OpenFlow queue used by flows set up by in-band control on @@ -830,10 +487,7 @@ ofproto_set_extra_in_band_remotes(struct ofproto *ofproto, void ofproto_set_in_band_queue(struct ofproto *ofproto, int queue_id) { - if (queue_id != ofproto->in_band_queue) { - ofproto->in_band_queue = queue_id; - update_in_band_remotes(ofproto); - } + connmgr_set_in_band_queue(ofproto->connmgr, queue_id); } void @@ -887,48 +541,10 @@ ofproto_set_desc(struct ofproto *p, } } -static int -set_pvconns(struct pvconn ***pvconnsp, size_t *n_pvconnsp, - const struct svec *svec) -{ - struct pvconn **pvconns = *pvconnsp; - size_t n_pvconns = *n_pvconnsp; - int retval = 0; - size_t i; - - for (i = 0; i < n_pvconns; i++) { - pvconn_close(pvconns[i]); - } - free(pvconns); - - pvconns = xmalloc(svec->n * sizeof *pvconns); - n_pvconns = 0; - for (i = 0; i < svec->n; i++) { - const char *name = svec->names[i]; - struct pvconn *pvconn; - int error; - - error = pvconn_open(name, &pvconn); - if (!error) { - pvconns[n_pvconns++] = pvconn; - } else { - VLOG_ERR("failed to listen on %s: %s", name, strerror(error)); - if (!retval) { - retval = error; - } - } - } - - *pvconnsp = pvconns; - *n_pvconnsp = n_pvconns; - - return retval; -} - int ofproto_set_snoops(struct ofproto *ofproto, const struct svec *snoops) { - return set_pvconns(&ofproto->snoops, &ofproto->n_snoops, snoops); + return connmgr_set_snoops(ofproto->connmgr, snoops); } int @@ -1041,32 +657,25 @@ ofproto_get_datapath_id(const struct ofproto *ofproto) bool ofproto_has_primary_controller(const struct ofproto *ofproto) { - return !hmap_is_empty(&ofproto->controllers); + return connmgr_has_controllers(ofproto->connmgr); } enum ofproto_fail_mode ofproto_get_fail_mode(const struct ofproto *p) { - return p->fail_mode; + return connmgr_get_fail_mode(p->connmgr); } void ofproto_get_snoops(const struct ofproto *ofproto, struct svec *snoops) { - size_t i; - - for (i = 0; i < ofproto->n_snoops; i++) { - svec_add(snoops, pvconn_get_name(ofproto->snoops[i])); - } + connmgr_get_snoops(ofproto->connmgr, snoops); } void ofproto_destroy(struct ofproto *p) { - struct ofservice *ofservice, *next_ofservice; - struct ofconn *ofconn, *next_ofconn; struct ofport *ofport, *next_ofport; - size_t i; if (!p) { return; @@ -1074,23 +683,13 @@ ofproto_destroy(struct ofproto *p) shash_find_and_delete(&all_ofprotos, dpif_name(p->dpif)); - /* Destroy fail-open and in-band early, since they touch the classifier. */ - fail_open_destroy(p->fail_open); - p->fail_open = NULL; - - in_band_destroy(p->in_band); - p->in_band = NULL; - free(p->extra_in_band_remotes); + /* Destroy connmgr early, since it touches the classifier. */ + connmgr_destroy(p->connmgr); ofproto_flush_flows(p); classifier_destroy(&p->cls); hmap_destroy(&p->facets); - LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) { - ofconn_destroy(ofconn); - } - hmap_destroy(&p->controllers); - dpif_close(p->dpif); netdev_monitor_destroy(p->netdev_monitor); HMAP_FOR_EACH_SAFE (ofport, next_ofport, hmap_node, &p->ports) { @@ -1102,16 +701,6 @@ ofproto_destroy(struct ofproto *p) netflow_destroy(p->netflow); ofproto_sflow_destroy(p->sflow); - HMAP_FOR_EACH_SAFE (ofservice, next_ofservice, node, &p->services) { - ofservice_destroy(p, ofservice); - } - hmap_destroy(&p->services); - - for (i = 0; i < p->n_snoops; i++) { - pvconn_close(p->snoops[i]); - } - free(p->snoops); - mac_learning_destroy(p->ml); free(p->mfr_desc); @@ -1146,54 +735,9 @@ process_port_change(struct ofproto *ofproto, int error, char *devname) } } -/* 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 ofconn *ofconn) -{ - switch (ofconn_get_role(ofconn)) { - case NX_ROLE_MASTER: - return 3; - case NX_ROLE_OTHER: - return 2; - case NX_ROLE_SLAVE: - return 1; - default: - /* Shouldn't happen. */ - return 0; - } -} - -/* One of ofproto's "snoop" pvconns has accepted a new connection on 'vconn'. - * Connects this vconn to a controller. */ -static void -add_snooper(struct ofproto *ofproto, struct vconn *vconn) -{ - struct ofconn *ofconn, *best; - - /* Pick a controller for monitoring. */ - best = NULL; - LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) { - if (ofconn_get_type(ofconn) == OFCONN_PRIMARY - && (!best || snoop_preference(ofconn) > snoop_preference(best))) { - best = ofconn; - } - } - - if (best) { - rconn_add_monitor(best->rconn, vconn); - } else { - VLOG_INFO_RL(&rl, "no controller connection to snoop"); - vconn_close(vconn); - } -} - int ofproto_run1(struct ofproto *p) { - struct ofconn *ofconn, *next_ofconn; - struct ofservice *ofservice; struct ofport *ofport; char *devname; int error; @@ -1235,56 +779,7 @@ ofproto_run1(struct ofproto *p) ofport_run(p, ofport); } - if (p->in_band) { - if (time_msec() >= p->next_in_band_update) { - update_in_band_remotes(p); - } - in_band_run(p->in_band); - } - - LIST_FOR_EACH_SAFE (ofconn, next_ofconn, node, &p->all_conns) { - ofconn_run(ofconn); - } - - /* Fail-open maintenance. Do this after processing the ofconns since - * fail-open checks the status of the controller rconn. */ - if (p->fail_open) { - fail_open_run(p->fail_open); - } - - HMAP_FOR_EACH (ofservice, node, &p->services) { - struct vconn *vconn; - int retval; - - retval = pvconn_accept(ofservice->pvconn, OFP_VERSION, &vconn); - if (!retval) { - struct rconn *rconn; - char *name; - - rconn = rconn_create(ofservice->probe_interval, 0); - name = ofconn_make_name(p, vconn_get_name(vconn)); - rconn_connect_unreliably(rconn, vconn, name); - free(name); - - ofconn = ofconn_create(p, rconn, OFCONN_SERVICE); - ofconn_set_rate_limit(ofconn, ofservice->rate_limit, - ofservice->burst_limit); - } else if (retval != EAGAIN) { - VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); - } - } - - for (i = 0; i < p->n_snoops; i++) { - struct vconn *vconn; - int retval; - - retval = pvconn_accept(p->snoops[i], OFP_VERSION, &vconn); - if (!retval) { - add_snooper(p, vconn); - } else if (retval != EAGAIN) { - VLOG_WARN_RL(&rl, "accept failed (%s)", strerror(retval)); - } - } + connmgr_run(p->connmgr, handle_openflow); if (time_msec() >= p->next_expiration) { int delay = ofproto_expire(p); @@ -1333,27 +828,14 @@ ofproto_run2(struct ofproto *p, bool revalidate_all) void ofproto_wait(struct ofproto *p) { - struct ofservice *ofservice; - struct ofconn *ofconn; struct ofport *ofport; - size_t i; - dpif_recv_wait(p->dpif); - dpif_port_poll_wait(p->dpif); - netdev_monitor_poll_wait(p->netdev_monitor); HMAP_FOR_EACH (ofport, hmap_node, &p->ports) { ofport_wait(ofport); } - LIST_FOR_EACH (ofconn, node, &p->all_conns) { - ofconn_wait(ofconn); - } - if (p->in_band) { - poll_timer_wait_until(p->next_in_band_update); - in_band_wait(p->in_band); - } - if (p->fail_open) { - fail_open_wait(p->fail_open); - } + dpif_recv_wait(p->dpif); + dpif_port_poll_wait(p->dpif); + netdev_monitor_poll_wait(p->netdev_monitor); if (p->sflow) { ofproto_sflow_wait(p->sflow); } @@ -1367,12 +849,7 @@ ofproto_wait(struct ofproto *p) } else if (p->next_expiration != LLONG_MAX) { poll_timer_wait_until(p->next_expiration); } - HMAP_FOR_EACH (ofservice, node, &p->services) { - pvconn_wait(ofservice->pvconn); - } - for (i = 0; i < p->n_snoops; i++) { - pvconn_wait(p->snoops[i]); - } + connmgr_wait(p->connmgr); } void @@ -1390,54 +867,14 @@ ofproto_get_revalidate_set(struct ofproto *ofproto) bool ofproto_is_alive(const struct ofproto *p) { - return !hmap_is_empty(&p->controllers); + return connmgr_has_controllers(p->connmgr); } void ofproto_get_ofproto_controller_info(const struct ofproto *ofproto, struct shash *info) { - const struct ofconn *ofconn; - - shash_init(info); - - HMAP_FOR_EACH (ofconn, hmap_node, &ofproto->controllers) { - const struct rconn *rconn = ofconn->rconn; - time_t now = time_now(); - time_t last_connection = rconn_get_last_connection(rconn); - time_t last_disconnect = rconn_get_last_disconnect(rconn); - const int last_error = rconn_get_last_error(rconn); - struct ofproto_controller_info *cinfo = xmalloc(sizeof *cinfo); - - shash_add(info, rconn_get_target(rconn), cinfo); - - cinfo->is_connected = rconn_is_connected(rconn); - cinfo->role = ofconn_get_role(ofconn); - - cinfo->pairs.n = 0; - - if (last_error) { - cinfo->pairs.keys[cinfo->pairs.n] = "last_error"; - cinfo->pairs.values[cinfo->pairs.n++] = - xstrdup(ovs_retval_to_string(last_error)); - } - - cinfo->pairs.keys[cinfo->pairs.n] = "state"; - cinfo->pairs.values[cinfo->pairs.n++] = - xstrdup(rconn_get_state(rconn)); - - if (last_connection != TIME_MIN) { - cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_connect"; - cinfo->pairs.values[cinfo->pairs.n++] - = xasprintf("%ld", (long int) (now - last_connection)); - } - - if (last_disconnect != TIME_MIN) { - cinfo->pairs.keys[cinfo->pairs.n] = "sec_since_disconnect"; - cinfo->pairs.values[cinfo->pairs.n++] - = xasprintf("%ld", (long int) (now - last_disconnect)); - } - } + connmgr_get_controller_info(ofproto->connmgr, info); } void @@ -1583,12 +1020,7 @@ ofproto_flush_flows(struct ofproto *ofproto) } dpif_flow_flush(ofproto->dpif); - if (ofproto->in_band) { - in_band_flushed(ofproto->in_band); - } - if (ofproto->fail_open) { - fail_open_flushed(ofproto->fail_open); - } + connmgr_flushed(ofproto->connmgr); } static void @@ -1695,25 +1127,7 @@ static void send_port_status(struct ofproto *p, const struct ofport *ofport, uint8_t reason) { - /* XXX Should limit the number of queued port status change messages. */ - struct ofconn *ofconn; - LIST_FOR_EACH (ofconn, node, &p->all_conns) { - struct ofp_port_status *ops; - struct ofpbuf *b; - - /* Primary controllers, even slaves, should always get port status - updates. Otherwise obey ofconn_receives_async_msgs(). */ - if (ofconn_get_type(ofconn) != OFCONN_PRIMARY - && !ofconn_receives_async_msgs(ofconn)) { - continue; - } - - ops = make_openflow_xid(sizeof *ops, OFPT_PORT_STATUS, 0, &b); - ops->reason = reason; - ops->desc = ofport->opp; - hton_ofp_phy_port(&ops->desc); - queue_tx(b, ofconn, NULL); - } + connmgr_send_port_status(p->connmgr, &ofport->opp, reason); } static void @@ -1883,250 +1297,6 @@ init_ports(struct ofproto *p) return 0; } -static struct ofconn * -ofconn_create(struct ofproto *p, struct rconn *rconn, enum ofconn_type type) -{ - struct ofconn *ofconn = xzalloc(sizeof *ofconn); - ofconn->ofproto = p; - list_push_back(&p->all_conns, &ofconn->node); - ofconn->rconn = rconn; - ofconn->type = type; - ofconn->flow_format = NXFF_OPENFLOW10; - ofconn->role = NX_ROLE_OTHER; - ofconn->packet_in_counter = rconn_packet_counter_create (); - ofconn->pktbuf = NULL; - ofconn->miss_send_len = 0; - ofconn->reply_counter = rconn_packet_counter_create (); - return ofconn; -} - -static void -ofconn_destroy(struct ofconn *ofconn) -{ - struct ofproto *ofproto = ofconn_get_ofproto(ofconn); - - if (ofconn_get_type(ofconn) == OFCONN_PRIMARY) { - hmap_remove(&ofproto->controllers, &ofconn->hmap_node); - } - - list_remove(&ofconn->node); - rconn_destroy(ofconn->rconn); - rconn_packet_counter_destroy(ofconn->packet_in_counter); - rconn_packet_counter_destroy(ofconn->reply_counter); - pktbuf_destroy(ofconn->pktbuf); - free(ofconn); -} - -static void -ofconn_run(struct ofconn *ofconn) -{ - struct ofproto *p = ofconn_get_ofproto(ofconn); - int iteration; - size_t i; - - for (i = 0; i < N_SCHEDULERS; i++) { - pinsched_run(ofconn->schedulers[i], do_send_packet_in, ofconn); - } - - rconn_run(ofconn->rconn); - - if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { - /* Limit the number of iterations to prevent other tasks from - * starving. */ - for (iteration = 0; iteration < 50; iteration++) { - struct ofpbuf *of_msg = rconn_recv(ofconn->rconn); - if (!of_msg) { - break; - } - if (p->fail_open) { - fail_open_maybe_recover(p->fail_open); - } - handle_openflow(ofconn, of_msg); - ofpbuf_delete(of_msg); - } - } - - if (!rconn_is_alive(ofconn->rconn)) { - ofconn_destroy(ofconn); - } -} - -static void -ofconn_wait(struct ofconn *ofconn) -{ - int i; - - for (i = 0; i < N_SCHEDULERS; i++) { - pinsched_wait(ofconn->schedulers[i]); - } - rconn_run_wait(ofconn->rconn); - if (rconn_packet_counter_read (ofconn->reply_counter) < OFCONN_REPLY_MAX) { - rconn_recv_wait(ofconn->rconn); - } else { - COVERAGE_INC(ofproto_ofconn_stuck); - } -} - -/* Returns true if 'ofconn' should receive asynchronous messages. */ -static bool -ofconn_receives_async_msgs(const struct ofconn *ofconn) -{ - if (ofconn_get_type(ofconn) == OFCONN_PRIMARY) { - /* Primary controllers always get asynchronous messages unless they - * have configured themselves as "slaves". */ - return ofconn_get_role(ofconn) != NX_ROLE_SLAVE; - } else { - /* Service connections don't get asynchronous messages unless they have - * explicitly asked for them by setting a nonzero miss send length. */ - return ofconn->miss_send_len > 0; - } -} - -/* Returns a human-readable name for an OpenFlow connection between 'ofproto' - * 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 ofproto *ofproto, const char *target) -{ - return xasprintf("%s<->%s", dpif_base_name(ofproto->dpif), target); -} - -static void -ofconn_set_rate_limit(struct ofconn *ofconn, int rate, int burst) -{ - int i; - - for (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 struct ofproto * -ofconn_get_ofproto(struct ofconn *ofconn) -{ - return ofconn->ofproto; -} - -static enum nx_flow_format -ofconn_get_flow_format(struct ofconn *ofconn) -{ - return ofconn->flow_format; -} - -static void -ofconn_set_flow_format(struct ofconn *ofconn, enum nx_flow_format flow_format) -{ - ofconn->flow_format = flow_format; -} - -static int -ofconn_get_miss_send_len(const struct ofconn *ofconn) -{ - return ofconn->miss_send_len; -} - -static void -ofconn_set_miss_send_len(struct ofconn *ofconn, int miss_send_len) -{ - ofconn->miss_send_len = miss_send_len; -} - -static enum ofconn_type -ofconn_get_type(const struct ofconn *ofconn) -{ - return ofconn->type; -} - -static enum nx_role -ofconn_get_role(const struct ofconn *ofconn) -{ - return ofconn->role; -} - -static void -ofconn_set_role(struct ofconn *ofconn, enum nx_role role) -{ - ofconn->role = role; -} - -static int -ofconn_pktbuf_retrieve(struct ofconn *ofconn, uint32_t id, - struct ofpbuf **bufferp, uint16_t *in_port) -{ - return pktbuf_retrieve(ofconn->pktbuf, id, bufferp, in_port); -} - -static void -ofservice_reconfigure(struct ofservice *ofservice, - const struct ofproto_controller *c) -{ - ofservice->probe_interval = c->probe_interval; - ofservice->rate_limit = c->rate_limit; - ofservice->burst_limit = c->burst_limit; -} - -/* Creates a new ofservice in 'ofproto'. Returns 0 if successful, otherwise a - * positive errno value. */ -static int -ofservice_create(struct ofproto *ofproto, const struct ofproto_controller *c) -{ - struct ofservice *ofservice; - struct pvconn *pvconn; - int error; - - error = pvconn_open(c->target, &pvconn); - if (error) { - return error; - } - - ofservice = xzalloc(sizeof *ofservice); - hmap_insert(&ofproto->services, &ofservice->node, - hash_string(c->target, 0)); - ofservice->pvconn = pvconn; - - ofservice_reconfigure(ofservice, c); - - return 0; -} - -static void -ofservice_destroy(struct ofproto *ofproto, struct ofservice *ofservice) -{ - hmap_remove(&ofproto->services, &ofservice->node); - pvconn_close(ofservice->pvconn); - free(ofservice); -} - -/* Finds and returns the ofservice within 'ofproto' that has the given - * 'target', or a null pointer if none exists. */ -static struct ofservice * -ofservice_lookup(struct ofproto *ofproto, const char *target) -{ - struct ofservice *ofservice; - - HMAP_FOR_EACH_WITH_HASH (ofservice, node, hash_string(target, 0), - &ofproto->services) { - if (!strcmp(pvconn_get_name(ofservice->pvconn), target)) { - return ofservice; - } - } - return NULL; -} - /* Returns true if 'rule' should be hidden from the controller. * * Rules with priority higher than UINT16_MAX are set up by ofproto itself @@ -2686,22 +1856,6 @@ facet_revalidate(struct ofproto *ofproto, struct facet *facet) return true; } -static void -queue_tx(struct ofpbuf *msg, const struct ofconn *ofconn, - struct rconn_packet_counter *counter) -{ - update_openflow_length(msg); - if (rconn_send(ofconn->rconn, msg, counter)) { - ofpbuf_delete(msg); - } -} - -static void -ofconn_send_reply(const struct ofconn *ofconn, struct ofpbuf *msg) -{ - queue_tx(msg, ofconn, ofconn->reply_counter); -} - static void send_error_oh(const struct ofconn *ofconn, const struct ofp_header *oh, int error) @@ -3301,8 +2455,9 @@ xlate_actions(struct action_xlate_ctx *ctx, /* Check with in-band control to see if we're allowed to set up this * flow. */ - if (!in_band_rule_check(ctx->ofproto->in_band, &ctx->flow, - ctx->odp_actions->data, ctx->odp_actions->size)) { + if (!connmgr_may_set_up_flow(ctx->ofproto->connmgr, &ctx->flow, + ctx->odp_actions->data, + ctx->odp_actions->size)) { ctx->may_set_up_flow = false; } @@ -4387,8 +3542,7 @@ handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh) uint32_t role; if (ofconn_get_type(ofconn) != OFCONN_PRIMARY) { - VLOG_WARN_RL(&rl, "ignoring role request on non-controller " - "connection"); + VLOG_WARN_RL(&rl, "ignoring role request on service connection"); return ofp_mkerr(OFPET_BAD_REQUEST, OFPBRC_EPERM); } @@ -4401,16 +3555,6 @@ handle_role_request(struct ofconn *ofconn, const struct ofp_header *oh) return ofp_mkerr(OFPET_BAD_REQUEST, -1); } - if (role == NX_ROLE_MASTER) { - struct ofproto *ofproto = ofconn_get_ofproto(ofconn); - struct ofconn *other; - - HMAP_FOR_EACH (other, hmap_node, &ofproto->controllers) { - if (ofconn_get_role(other) == NX_ROLE_MASTER) { - ofconn_set_role(other, NX_ROLE_SLAVE); - } - } - } ofconn_set_role(ofconn, role); reply = make_nxmsg_xid(sizeof *reply, NXT_ROLE_REPLY, oh->xid, &buf); @@ -4601,7 +3745,7 @@ handle_miss_upcall(struct ofproto *p, struct dpif_upcall *upcall) /* Check with in-band control to see if this packet should be sent * to the local port regardless of the flow table. */ - if (in_band_msg_in_hook(p->in_band, &flow, upcall->packet)) { + if (connmgr_msg_in_hook(p->connmgr, &flow, upcall->packet)) { ofproto_send_packet(p, ODPP_LOCAL, 0, upcall->packet); } @@ -4962,7 +4106,6 @@ static void rule_send_removed(struct ofproto *p, struct rule *rule, uint8_t reason) { struct ofputil_flow_removed fr; - struct ofconn *ofconn; if (!rule->send_flow_removed) { return; @@ -4976,22 +4119,7 @@ rule_send_removed(struct ofproto *p, struct rule *rule, uint8_t reason) fr.packet_count = rule->packet_count; fr.byte_count = rule->byte_count; - LIST_FOR_EACH (ofconn, node, &p->all_conns) { - struct ofpbuf *msg; - - if (!rconn_is_connected(ofconn->rconn) - || !ofconn_receives_async_msgs(ofconn)) { - continue; - } - - /* This accounts flow expirations as if they were 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.) */ - msg = ofputil_encode_flow_removed(&fr, ofconn_get_flow_format(ofconn)); - ofconn_send_reply(ofconn, msg); - } + connmgr_send_flow_removed(p->connmgr, &fr); } /* Obtains statistics for 'rule' and stores them in '*packets' and '*bytes'. @@ -5019,64 +4147,6 @@ rule_get_stats(const struct rule *rule, uint64_t *packets, uint64_t *bytes) *bytes = b; } -/* pinsched callback for sending 'ofp_packet_in' on 'ofconn'. */ -static void -do_send_packet_in(struct ofpbuf *ofp_packet_in, void *ofconn_) -{ - struct ofconn *ofconn = ofconn_; - - rconn_send_with_limit(ofconn->rconn, ofp_packet_in, - ofconn->packet_in_counter, 100); -} - -/* Takes 'upcall', whose packet has the flow specified by 'flow', composes an - * OpenFlow packet-in message from it, and passes it to 'ofconn''s packet - * scheduler for sending. - * - * If 'clone' is true, the caller retains ownership of 'upcall->packet'. - * Otherwise, ownership is transferred to this function. */ -static void -schedule_packet_in(struct ofconn *ofconn, struct dpif_upcall *upcall, - const struct flow *flow, bool clone) -{ - struct ofproto *ofproto = ofconn_get_ofproto(ofconn); - struct ofputil_packet_in pin; - struct ofpbuf *msg; - - /* Figure out the easy parts. */ - pin.packet = upcall->packet; - pin.in_port = odp_port_to_ofp_port(flow->in_port); - pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION; - - /* Get OpenFlow buffer_id. */ - if (upcall->type == DPIF_UC_ACTION) { - pin.buffer_id = UINT32_MAX; - } else if (ofproto->fail_open && fail_open_is_active(ofproto->fail_open)) { - pin.buffer_id = pktbuf_get_null(); - } else if (!ofconn->pktbuf) { - pin.buffer_id = UINT32_MAX; - } else { - pin.buffer_id = pktbuf_save(ofconn->pktbuf, upcall->packet, - flow->in_port); - } - - /* Figure out how much of the packet to send. */ - pin.send_len = upcall->packet->size; - if (pin.buffer_id != UINT32_MAX) { - pin.send_len = MIN(pin.send_len, ofconn->miss_send_len); - } - if (upcall->type == DPIF_UC_ACTION) { - pin.send_len = MIN(pin.send_len, upcall->userdata); - } - - /* Make OFPT_PACKET_IN and hand over to packet scheduler. It might - * immediately call into do_send_packet_in() or it might buffer it for a - * while (until a later call to pinsched_run()). */ - msg = ofputil_encode_packet_in(&pin, clone ? NULL : upcall->packet); - pinsched_send(ofconn->schedulers[upcall->type == DPIF_UC_MISS ? 0 : 1], - flow->in_port, msg, do_send_packet_in, ofconn); -} - /* Given 'upcall', of type DPIF_UC_ACTION or DPIF_UC_MISS, sends an * OFPT_PACKET_IN message to each OpenFlow controller as necessary according to * their individual configurations. @@ -5087,22 +4157,15 @@ static void send_packet_in(struct ofproto *ofproto, struct dpif_upcall *upcall, const struct flow *flow, bool clone) { - struct ofconn *ofconn, *prev; + struct ofputil_packet_in pin; - prev = NULL; - LIST_FOR_EACH (ofconn, node, &ofproto->all_conns) { - if (ofconn_receives_async_msgs(ofconn)) { - if (prev) { - schedule_packet_in(prev, upcall, flow, true); - } - prev = ofconn; - } - } - if (prev) { - schedule_packet_in(prev, upcall, flow, clone); - } else if (!clone) { - ofpbuf_delete(upcall->packet); - } + pin.packet = upcall->packet; + pin.in_port = odp_port_to_ofp_port(flow->in_port); + pin.reason = upcall->type == DPIF_UC_MISS ? OFPR_NO_MATCH : OFPR_ACTION; + pin.buffer_id = 0; /* not yet known */ + pin.send_len = upcall->userdata; + connmgr_send_packet_in(ofproto->connmgr, upcall, flow, + clone ? NULL : upcall->packet); } static uint64_t