1 /* Copyright (c) 2008, 2009 Nicira Networks
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
20 #include <arpa/inet.h>
24 #include <openflow/openflow.h>
29 #include <sys/socket.h>
30 #include <sys/types.h>
37 #include "dynamic-string.h"
41 #include "mac-learning.h"
44 #include "ofp-print.h"
47 #include "poll-loop.h"
48 #include "port-array.h"
49 #include "proc-net-compat.h"
51 #include "secchan/ofproto.h"
52 #include "socket-util.h"
59 #include "vconn-ssl.h"
60 #include "xenserver.h"
63 #define THIS_MODULE VLM_bridge
71 extern uint64_t mgmt_id;
74 struct port *port; /* Containing port. */
75 size_t port_ifidx; /* Index within containing port. */
77 char *name; /* Host network device name. */
78 int dp_ifidx; /* Index within kernel datapath. */
80 uint8_t mac[ETH_ADDR_LEN]; /* Ethernet address (all zeros if unknowns). */
82 tag_type tag; /* Tag associated with this interface. */
83 bool enabled; /* May be chosen for flows? */
84 long long delay_expires; /* Time after which 'enabled' may change. */
87 #define BOND_MASK 0xff
89 int iface_idx; /* Index of assigned iface, or -1 if none. */
90 uint64_t tx_bytes; /* Count of bytes recently transmitted. */
91 tag_type iface_tag; /* Tag associated with iface_idx. */
94 #define MAX_MIRRORS 32
95 typedef uint32_t mirror_mask_t;
96 #define MIRROR_MASK_C(X) UINT32_C(X)
97 BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
99 struct bridge *bridge;
103 /* Selection criteria. */
104 struct svec src_ports;
105 struct svec dst_ports;
110 struct port *out_port;
114 #define FLOOD_PORT ((struct port *) 1) /* The 'flood' output port. */
116 struct bridge *bridge;
118 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
119 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1. */
122 /* An ordinary bridge port has 1 interface.
123 * A bridge port for bonding has at least 2 interfaces. */
124 struct iface **ifaces;
125 size_t n_ifaces, allocated_ifaces;
128 struct bond_entry *bond_hash; /* An array of (BOND_MASK + 1) elements. */
129 int active_iface; /* Ifidx on which bcasts accepted, or -1. */
130 tag_type active_iface_tag; /* Tag for bcast flows. */
131 tag_type no_ifaces_tag; /* Tag for flows when all ifaces disabled. */
132 int updelay, downdelay; /* Delay before iface goes up/down, in ms. */
134 /* Port mirroring info. */
135 mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
136 mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
137 bool is_mirror_output_port; /* Does port mirroring send frames here? */
139 /* Spanning tree info. */
140 enum stp_state stp_state; /* Always STP_FORWARDING if STP not in use. */
141 tag_type stp_state_tag; /* Tag for STP state change. */
144 #define DP_MAX_PORTS 255
146 struct list node; /* Node in global list of bridges. */
147 char *name; /* User-specified arbitrary name. */
148 struct mac_learning *ml; /* MAC learning table, or null not to learn. */
149 bool sent_config_request; /* Successfully sent config request? */
150 uint8_t default_ea[ETH_ADDR_LEN]; /* Default MAC. */
152 /* Support for remote controllers. */
153 char *controller; /* NULL if there is no remote controller;
154 * "discover" to do controller discovery;
155 * otherwise a vconn name. */
157 /* OpenFlow switch processing. */
158 struct ofproto *ofproto; /* OpenFlow switch. */
160 /* Kernel datapath information. */
161 struct dpif dpif; /* Kernel datapath. */
162 struct port_array ifaces; /* Indexed by kernel datapath port number. */
166 size_t n_ports, allocated_ports;
169 bool has_bonded_ports;
170 long long int bond_next_rebalance;
175 /* Flow statistics gathering. */
176 time_t next_stats_request;
178 /* Port mirroring. */
179 struct mirror *mirrors[MAX_MIRRORS];
183 long long int stp_last_tick;
186 /* List of all bridges. */
187 static struct list all_bridges = LIST_INITIALIZER(&all_bridges);
189 /* Maximum number of datapaths. */
190 enum { DP_MAX = 256 };
192 static struct bridge *bridge_create(const char *name);
193 static void bridge_destroy(struct bridge *);
194 static struct bridge *bridge_lookup(const char *name);
195 static int bridge_run_one(struct bridge *);
196 static void bridge_reconfigure_one(struct bridge *);
197 static void bridge_reconfigure_controller(struct bridge *);
198 static void bridge_get_all_ifaces(const struct bridge *, struct svec *ifaces);
199 static void bridge_fetch_dp_ifaces(struct bridge *);
200 static void bridge_flush(struct bridge *);
201 static void bridge_pick_local_hw_addr(struct bridge *,
202 uint8_t ea[ETH_ADDR_LEN],
203 const char **devname);
204 static uint64_t bridge_pick_datapath_id(struct bridge *,
205 const uint8_t bridge_ea[ETH_ADDR_LEN],
206 const char *devname);
207 static uint64_t dpid_from_hash(const void *, size_t nbytes);
209 static void bond_init(void);
210 static void bond_run(struct bridge *);
211 static void bond_wait(struct bridge *);
212 static void bond_rebalance_port(struct port *);
213 static void bond_send_learning_packets(struct port *);
215 static void port_create(struct bridge *, const char *name);
216 static void port_reconfigure(struct port *);
217 static void port_destroy(struct port *);
218 static struct port *port_lookup(const struct bridge *, const char *name);
219 static struct iface *port_lookup_iface(const struct port *, const char *name);
220 static struct port *port_from_dp_ifidx(const struct bridge *,
222 static void port_update_bond_compat(struct port *);
223 static void port_update_vlan_compat(struct port *);
225 static void mirror_create(struct bridge *, const char *name);
226 static void mirror_destroy(struct mirror *);
227 static void mirror_reconfigure(struct bridge *);
228 static void mirror_reconfigure_one(struct mirror *);
229 static bool vlan_is_mirrored(const struct mirror *, int vlan);
231 static void brstp_reconfigure(struct bridge *);
232 static void brstp_adjust_timers(struct bridge *);
233 static void brstp_run(struct bridge *);
234 static void brstp_wait(struct bridge *);
236 static void iface_create(struct port *, const char *name);
237 static void iface_destroy(struct iface *);
238 static struct iface *iface_lookup(const struct bridge *, const char *name);
239 static struct iface *iface_from_dp_ifidx(const struct bridge *,
242 /* Hooks into ofproto processing. */
243 static struct ofhooks bridge_ofhooks;
245 /* Public functions. */
247 /* Adds the name of each interface used by a bridge, including local and
248 * internal ports, to 'svec'. */
250 bridge_get_ifaces(struct svec *svec)
252 struct bridge *br, *next;
255 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
256 for (i = 0; i < br->n_ports; i++) {
257 struct port *port = br->ports[i];
259 for (j = 0; j < port->n_ifaces; j++) {
260 struct iface *iface = port->ifaces[j];
261 if (iface->dp_ifidx < 0) {
262 VLOG_ERR("%s interface not in dp%u, ignoring",
263 iface->name, dpif_id(&br->dpif));
265 if (iface->dp_ifidx != ODPP_LOCAL) {
266 svec_add(svec, iface->name);
274 /* The caller must already have called cfg_read(). */
283 for (i = 0; i < DP_MAX; i++) {
287 sprintf(devname, "dp%d", i);
288 retval = dpif_open(devname, &dpif);
290 char dpif_name[IF_NAMESIZE];
291 if (dpif_port_get_name(&dpif, ODPP_LOCAL,
292 dpif_name, sizeof dpif_name)
293 || !cfg_has("bridge.%s.port", dpif_name)) {
297 } else if (retval != ENODEV) {
298 VLOG_ERR("failed to delete datapath dp%d: %s",
299 i, strerror(retval));
303 bridge_reconfigure();
308 config_string_change(const char *key, char **valuep)
310 const char *value = cfg_get_string(0, "%s", key);
311 if (value && (!*valuep || strcmp(value, *valuep))) {
313 *valuep = xstrdup(value);
321 bridge_configure_ssl(void)
323 /* XXX SSL should be configurable on a per-bridge basis.
324 * XXX should be possible to de-configure SSL. */
325 static char *private_key_file;
326 static char *certificate_file;
327 static char *cacert_file;
330 if (config_string_change("ssl.private-key", &private_key_file)) {
331 vconn_ssl_set_private_key_file(private_key_file);
334 if (config_string_change("ssl.certificate", &certificate_file)) {
335 vconn_ssl_set_certificate_file(certificate_file);
338 /* We assume that even if the filename hasn't changed, if the CA cert
339 * file has been removed, that we want to move back into
340 * boot-strapping mode. This opens a small security hole, because
341 * the old certificate will still be trusted until vSwitch is
342 * restarted. We may want to address this in vconn's SSL library. */
343 if (config_string_change("ssl.ca-cert", &cacert_file)
344 || (stat(cacert_file, &s) && errno == ENOENT)) {
345 vconn_ssl_set_ca_cert_file(cacert_file,
346 cfg_get_bool(0, "ssl.bootstrap-ca-cert"));
352 bridge_reconfigure(void)
354 struct svec old_br, new_br, raw_new_br;
355 struct bridge *br, *next;
358 COVERAGE_INC(bridge_reconfigure);
360 /* Collect old bridges. */
362 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
363 svec_add(&old_br, br->name);
366 /* Collect new bridges. */
367 svec_init(&raw_new_br);
368 cfg_get_subsections(&raw_new_br, "bridge");
370 for (i = 0; i < raw_new_br.n; i++) {
371 const char *name = raw_new_br.names[i];
372 if ((!strncmp(name, "dp", 2) && isdigit(name[2])) ||
373 (!strncmp(name, "nl:", 3) && isdigit(name[3]))) {
374 VLOG_ERR("%s is not a valid bridge name (bridges may not be "
375 "named \"dp\" or \"nl:\" followed by a digit)", name);
377 svec_add(&new_br, name);
380 svec_destroy(&raw_new_br);
382 /* Get rid of deleted bridges and add new bridges. */
385 assert(svec_is_unique(&old_br));
386 assert(svec_is_unique(&new_br));
387 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
388 if (!svec_contains(&new_br, br->name)) {
392 for (i = 0; i < new_br.n; i++) {
393 const char *name = new_br.names[i];
394 if (!svec_contains(&old_br, name)) {
398 svec_destroy(&old_br);
399 svec_destroy(&new_br);
403 bridge_configure_ssl();
406 /* Reconfigure all bridges. */
407 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
408 bridge_reconfigure_one(br);
411 /* Add and delete ports on all datapaths.
413 * The kernel will reject any attempt to add a given port to a datapath if
414 * that port already belongs to a different datapath, so we must do all
415 * port deletions before any port additions. */
416 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
417 struct odp_port *dpif_ports;
419 struct svec want_ifaces;
421 dpif_port_list(&br->dpif, &dpif_ports, &n_dpif_ports);
422 bridge_get_all_ifaces(br, &want_ifaces);
423 for (i = 0; i < n_dpif_ports; i++) {
424 const struct odp_port *p = &dpif_ports[i];
425 if (!svec_contains(&want_ifaces, p->devname)
426 && strcmp(p->devname, br->name)) {
427 int retval = dpif_port_del(&br->dpif, p->port);
429 VLOG_ERR("failed to remove %s interface from dp%u: %s",
430 p->devname, dpif_id(&br->dpif), strerror(retval));
434 svec_destroy(&want_ifaces);
437 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
438 struct odp_port *dpif_ports;
440 struct svec cur_ifaces, want_ifaces, add_ifaces;
443 dpif_port_list(&br->dpif, &dpif_ports, &n_dpif_ports);
444 svec_init(&cur_ifaces);
445 for (i = 0; i < n_dpif_ports; i++) {
446 svec_add(&cur_ifaces, dpif_ports[i].devname);
449 svec_sort_unique(&cur_ifaces);
450 bridge_get_all_ifaces(br, &want_ifaces);
451 svec_diff(&want_ifaces, &cur_ifaces, &add_ifaces, NULL, NULL);
454 for (i = 0; i < add_ifaces.n; i++) {
455 const char *if_name = add_ifaces.names[i];
457 int internal = cfg_get_bool(0, "iface.%s.internal", if_name);
458 int error = dpif_port_add(&br->dpif, if_name, next_port_no++,
459 internal ? ODP_PORT_INTERNAL : 0);
460 if (error != EEXIST) {
461 if (next_port_no >= 256) {
462 VLOG_ERR("ran out of valid port numbers on dp%u",
467 VLOG_ERR("failed to add %s interface to dp%u: %s",
468 if_name, dpif_id(&br->dpif), strerror(error));
475 svec_destroy(&cur_ifaces);
476 svec_destroy(&want_ifaces);
477 svec_destroy(&add_ifaces);
479 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
482 struct iface *local_iface = NULL;
484 uint8_t engine_type, engine_id;
485 bool add_id_to_iface = false;
486 struct svec nf_hosts;
488 bridge_fetch_dp_ifaces(br);
489 for (i = 0; i < br->n_ports; ) {
490 struct port *port = br->ports[i];
492 for (j = 0; j < port->n_ifaces; ) {
493 struct iface *iface = port->ifaces[j];
494 if (iface->dp_ifidx < 0) {
495 VLOG_ERR("%s interface not in dp%u, dropping",
496 iface->name, dpif_id(&br->dpif));
497 iface_destroy(iface);
499 if (iface->dp_ifidx == ODPP_LOCAL) {
502 VLOG_DBG("dp%u has interface %s on port %d",
503 dpif_id(&br->dpif), iface->name, iface->dp_ifidx);
507 if (!port->n_ifaces) {
508 VLOG_ERR("%s port has no interfaces, dropping", port->name);
515 /* Pick local port hardware address, datapath ID. */
516 bridge_pick_local_hw_addr(br, ea, &devname);
518 int error = netdev_nodev_set_etheraddr(local_iface->name, ea);
520 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
521 VLOG_ERR_RL(&rl, "bridge %s: failed to set bridge "
522 "Ethernet address: %s",
523 br->name, strerror(error));
527 dpid = bridge_pick_datapath_id(br, ea, devname);
528 ofproto_set_datapath_id(br->ofproto, dpid);
530 /* Set NetFlow configuration on this bridge. */
531 dpif_get_netflow_ids(&br->dpif, &engine_type, &engine_id);
532 if (cfg_has("netflow.%s.engine-type", br->name)) {
533 engine_type = cfg_get_int(0, "netflow.%s.engine-type",
536 if (cfg_has("netflow.%s.engine-id", br->name)) {
537 engine_id = cfg_get_int(0, "netflow.%s.engine-id", br->name);
539 if (cfg_has("netflow.%s.add-id-to-iface", br->name)) {
540 add_id_to_iface = cfg_get_bool(0, "netflow.%s.add-id-to-iface",
543 if (add_id_to_iface && engine_id > 0x7f) {
544 VLOG_WARN("bridge %s: netflow port mangling may conflict with "
545 "another vswitch, choose an engine id less than 128",
548 if (add_id_to_iface && br->n_ports > 0x1ff) {
549 VLOG_WARN("bridge %s: netflow port mangling will conflict with "
550 "another port when 512 or more ports are used",
553 svec_init(&nf_hosts);
554 cfg_get_all_keys(&nf_hosts, "netflow.%s.host", br->name);
555 if (ofproto_set_netflow(br->ofproto, &nf_hosts, engine_type,
556 engine_id, add_id_to_iface)) {
557 VLOG_ERR("bridge %s: problem setting netflow collectors",
561 /* Update the controller and related settings. It would be more
562 * straightforward to call this from bridge_reconfigure_one(), but we
563 * can't do it there for two reasons. First, and most importantly, at
564 * that point we don't know the dp_ifidx of any interfaces that have
565 * been added to the bridge (because we haven't actually added them to
566 * the datapath). Second, at that point we haven't set the datapath ID
567 * yet; when a controller is configured, resetting the datapath ID will
568 * immediately disconnect from the controller, so it's better to set
569 * the datapath ID before the controller. */
570 bridge_reconfigure_controller(br);
572 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
573 for (i = 0; i < br->n_ports; i++) {
574 struct port *port = br->ports[i];
575 port_update_vlan_compat(port);
578 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
579 brstp_reconfigure(br);
584 bridge_pick_local_hw_addr(struct bridge *br, uint8_t ea[ETH_ADDR_LEN],
585 const char **devname)
587 uint64_t requested_ea;
593 /* Did the user request a particular MAC? */
594 requested_ea = cfg_get_mac(0, "bridge.%s.mac", br->name);
596 eth_addr_from_uint64(requested_ea, ea);
597 if (eth_addr_is_multicast(ea)) {
598 VLOG_ERR("bridge %s: cannot set MAC address to multicast "
599 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
600 } else if (eth_addr_is_zero(ea)) {
601 VLOG_ERR("bridge %s: cannot set MAC address to zero", br->name);
607 /* Otherwise choose the minimum MAC address among all of the interfaces.
608 * (Xen uses FE:FF:FF:FF:FF:FF for virtual interfaces so this will get the
609 * MAC of the physical interface in such an environment.) */
610 memset(ea, 0xff, sizeof ea);
611 for (i = 0; i < br->n_ports; i++) {
612 struct port *port = br->ports[i];
613 if (port->is_mirror_output_port) {
616 for (j = 0; j < port->n_ifaces; j++) {
617 struct iface *iface = port->ifaces[j];
618 uint8_t iface_ea[ETH_ADDR_LEN];
619 if (iface->dp_ifidx == ODPP_LOCAL
620 || cfg_get_bool(0, "iface.%s.internal", iface->name)) {
623 error = netdev_nodev_get_etheraddr(iface->name, iface_ea);
625 if (!eth_addr_is_multicast(iface_ea) &&
626 !eth_addr_is_reserved(iface_ea) &&
627 !eth_addr_is_zero(iface_ea) &&
628 memcmp(iface_ea, ea, ETH_ADDR_LEN) < 0) {
629 memcpy(ea, iface_ea, ETH_ADDR_LEN);
630 *devname = iface->name;
633 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
634 VLOG_ERR_RL(&rl, "failed to obtain Ethernet address of %s: %s",
635 iface->name, strerror(error));
639 if (eth_addr_is_multicast(ea) || eth_addr_is_vif(ea)) {
640 memcpy(ea, br->default_ea, ETH_ADDR_LEN);
642 VLOG_WARN("bridge %s: using default bridge Ethernet "
643 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
645 VLOG_DBG("bridge %s: using bridge Ethernet address "ETH_ADDR_FMT,
646 br->name, ETH_ADDR_ARGS(ea));
650 /* Choose and returns the datapath ID for bridge 'br' given that the bridge
651 * Ethernet address is 'bridge_ea'. If 'bridge_ea' is the Ethernet address of
652 * a network device, then that network device's name must be passed in as
653 * 'devname'; if 'bridge_ea' was derived some other way, then 'devname' must be
654 * passed in as a null pointer. */
656 bridge_pick_datapath_id(struct bridge *br,
657 const uint8_t bridge_ea[ETH_ADDR_LEN],
661 * The procedure for choosing a bridge MAC address will, in the most
662 * ordinary case, also choose a unique MAC that we can use as a datapath
663 * ID. In some special cases, though, multiple bridges will end up with
664 * the same MAC address. This is OK for the bridges, but it will confuse
665 * the OpenFlow controller, because each datapath needs a unique datapath
668 * Datapath IDs must be unique. It is also very desirable that they be
669 * stable from one run to the next, so that policy set on a datapath
674 dpid = cfg_get_dpid(0, "bridge.%s.datapath-id", br->name);
681 if (!netdev_get_vlan_vid(devname, &vlan)) {
683 * A bridge whose MAC address is taken from a VLAN network device
684 * (that is, a network device created with vconfig(8) or similar
685 * tool) will have the same MAC address as a bridge on the VLAN
686 * device's physical network device.
688 * Handle this case by hashing the physical network device MAC
689 * along with the VLAN identifier.
691 uint8_t buf[ETH_ADDR_LEN + 2];
692 memcpy(buf, bridge_ea, ETH_ADDR_LEN);
693 buf[ETH_ADDR_LEN] = vlan >> 8;
694 buf[ETH_ADDR_LEN + 1] = vlan;
695 return dpid_from_hash(buf, sizeof buf);
698 * Assume that this bridge's MAC address is unique, since it
699 * doesn't fit any of the cases we handle specially.
704 * A purely internal bridge, that is, one that has no non-virtual
705 * network devices on it at all, is more difficult because it has no
706 * natural unique identifier at all.
708 * When the host is a XenServer, we handle this case by hashing the
709 * host's UUID with the name of the bridge. Names of bridges are
710 * persistent across XenServer reboots, although they can be reused if
711 * an internal network is destroyed and then a new one is later
712 * created, so this is fairly effective.
714 * When the host is not a XenServer, we punt by using a random MAC
715 * address on each run.
717 const char *host_uuid = xenserver_get_host_uuid();
719 char *combined = xasprintf("%s,%s", host_uuid, br->name);
720 dpid = dpid_from_hash(combined, strlen(combined));
726 return eth_addr_to_uint64(bridge_ea);
730 dpid_from_hash(const void *data, size_t n)
732 uint8_t hash[SHA1_DIGEST_SIZE];
734 BUILD_ASSERT_DECL(sizeof hash >= ETH_ADDR_LEN);
735 sha1_bytes(data, n, hash);
736 eth_addr_mark_random(hash);
737 return eth_addr_to_uint64(hash);
743 struct bridge *br, *next;
747 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
748 int error = bridge_run_one(br);
750 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
751 VLOG_ERR_RL(&rl, "bridge %s: datapath was destroyed externally, "
752 "forcing reconfiguration", br->name);
766 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
767 ofproto_wait(br->ofproto);
768 if (br->controller) {
773 mac_learning_wait(br->ml);
780 /* Forces 'br' to revalidate all of its flows. This is appropriate when 'br''s
781 * configuration changes. */
783 bridge_flush(struct bridge *br)
785 COVERAGE_INC(bridge_flush);
788 mac_learning_flush(br->ml);
792 /* Bridge reconfiguration functions. */
794 static struct bridge *
795 bridge_create(const char *name)
800 assert(!bridge_lookup(name));
801 br = xcalloc(1, sizeof *br);
803 error = dpif_create(name, &br->dpif);
804 if (error == EEXIST) {
805 error = dpif_open(name, &br->dpif);
807 VLOG_ERR("datapath %s already exists but cannot be opened: %s",
808 name, strerror(error));
812 dpif_flow_flush(&br->dpif);
814 VLOG_ERR("failed to create datapath %s: %s", name, strerror(error));
819 error = ofproto_create(name, &bridge_ofhooks, br, &br->ofproto);
821 VLOG_ERR("failed to create switch %s: %s", name, strerror(error));
822 dpif_delete(&br->dpif);
823 dpif_close(&br->dpif);
828 br->name = xstrdup(name);
829 br->ml = mac_learning_create();
830 br->sent_config_request = false;
831 eth_addr_random(br->default_ea);
833 port_array_init(&br->ifaces);
836 br->bond_next_rebalance = time_msec() + 10000;
838 list_push_back(&all_bridges, &br->node);
840 VLOG_INFO("created bridge %s on dp%u", br->name, dpif_id(&br->dpif));
846 bridge_destroy(struct bridge *br)
851 while (br->n_ports > 0) {
852 port_destroy(br->ports[br->n_ports - 1]);
854 list_remove(&br->node);
855 error = dpif_delete(&br->dpif);
856 if (error && error != ENOENT) {
857 VLOG_ERR("failed to delete dp%u: %s",
858 dpif_id(&br->dpif), strerror(error));
860 dpif_close(&br->dpif);
861 ofproto_destroy(br->ofproto);
862 free(br->controller);
863 mac_learning_destroy(br->ml);
864 port_array_destroy(&br->ifaces);
871 static struct bridge *
872 bridge_lookup(const char *name)
876 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
877 if (!strcmp(br->name, name)) {
885 bridge_exists(const char *name)
887 return bridge_lookup(name) ? true : false;
891 bridge_get_datapathid(const char *name)
893 struct bridge *br = bridge_lookup(name);
894 return br ? ofproto_get_datapath_id(br->ofproto) : 0;
898 bridge_run_one(struct bridge *br)
902 error = ofproto_run1(br->ofproto);
908 mac_learning_run(br->ml, ofproto_get_revalidate_set(br->ofproto));
913 error = ofproto_run2(br->ofproto, br->flush);
920 bridge_get_controller(const struct bridge *br)
922 const char *controller;
924 controller = cfg_get_string(0, "bridge.%s.controller", br->name);
926 controller = cfg_get_string(0, "mgmt.controller");
928 return controller && controller[0] ? controller : NULL;
932 bridge_reconfigure_one(struct bridge *br)
934 struct svec old_ports, new_ports, ifaces;
935 struct svec listeners, old_listeners;
936 struct svec snoops, old_snoops;
939 /* Collect old ports. */
940 svec_init(&old_ports);
941 for (i = 0; i < br->n_ports; i++) {
942 svec_add(&old_ports, br->ports[i]->name);
944 svec_sort(&old_ports);
945 assert(svec_is_unique(&old_ports));
947 /* Collect new ports. */
948 svec_init(&new_ports);
949 cfg_get_all_keys(&new_ports, "bridge.%s.port", br->name);
950 svec_sort(&new_ports);
951 if (bridge_get_controller(br) && !svec_contains(&new_ports, br->name)) {
952 svec_add(&new_ports, br->name);
953 svec_sort(&new_ports);
955 if (!svec_is_unique(&new_ports)) {
956 VLOG_WARN("bridge %s: %s specified twice as bridge port",
957 br->name, svec_get_duplicate(&new_ports));
958 svec_unique(&new_ports);
961 ofproto_set_mgmt_id(br->ofproto, mgmt_id);
963 /* Get rid of deleted ports and add new ports. */
964 for (i = 0; i < br->n_ports; ) {
965 struct port *port = br->ports[i];
966 if (!svec_contains(&new_ports, port->name)) {
972 for (i = 0; i < new_ports.n; i++) {
973 const char *name = new_ports.names[i];
974 if (!svec_contains(&old_ports, name)) {
975 port_create(br, name);
978 svec_destroy(&old_ports);
979 svec_destroy(&new_ports);
981 /* Reconfigure all ports. */
982 for (i = 0; i < br->n_ports; i++) {
983 port_reconfigure(br->ports[i]);
986 /* Check and delete duplicate interfaces. */
988 for (i = 0; i < br->n_ports; ) {
989 struct port *port = br->ports[i];
990 for (j = 0; j < port->n_ifaces; ) {
991 struct iface *iface = port->ifaces[j];
992 if (svec_contains(&ifaces, iface->name)) {
993 VLOG_ERR("bridge %s: %s interface is on multiple ports, "
995 br->name, iface->name, port->name);
996 iface_destroy(iface);
998 svec_add(&ifaces, iface->name);
1003 if (!port->n_ifaces) {
1004 VLOG_ERR("%s port has no interfaces, dropping", port->name);
1010 svec_destroy(&ifaces);
1012 /* Delete all flows if we're switching from connected to standalone or vice
1013 * versa. (XXX Should we delete all flows if we are switching from one
1014 * controller to another?) */
1016 /* Configure OpenFlow management listeners. */
1017 svec_init(&listeners);
1018 cfg_get_all_strings(&listeners, "bridge.%s.openflow.listeners", br->name);
1020 svec_add_nocopy(&listeners, xasprintf("punix:%s/%s.mgmt",
1021 ovs_rundir, br->name));
1022 } else if (listeners.n == 1 && !strcmp(listeners.names[0], "none")) {
1023 svec_clear(&listeners);
1025 svec_sort_unique(&listeners);
1027 svec_init(&old_listeners);
1028 ofproto_get_listeners(br->ofproto, &old_listeners);
1029 svec_sort_unique(&old_listeners);
1031 if (!svec_equal(&listeners, &old_listeners)) {
1032 ofproto_set_listeners(br->ofproto, &listeners);
1034 svec_destroy(&listeners);
1035 svec_destroy(&old_listeners);
1037 /* Configure OpenFlow controller connection snooping. */
1039 cfg_get_all_strings(&snoops, "bridge.%s.openflow.snoops", br->name);
1041 svec_add_nocopy(&snoops, xasprintf("punix:%s/%s.snoop",
1042 ovs_rundir, br->name));
1043 } else if (snoops.n == 1 && !strcmp(snoops.names[0], "none")) {
1044 svec_clear(&snoops);
1046 svec_sort_unique(&snoops);
1048 svec_init(&old_snoops);
1049 ofproto_get_snoops(br->ofproto, &old_snoops);
1050 svec_sort_unique(&old_snoops);
1052 if (!svec_equal(&snoops, &old_snoops)) {
1053 ofproto_set_snoops(br->ofproto, &snoops);
1055 svec_destroy(&snoops);
1056 svec_destroy(&old_snoops);
1058 mirror_reconfigure(br);
1062 bridge_reconfigure_controller(struct bridge *br)
1064 char *pfx = xasprintf("bridge.%s.controller", br->name);
1065 const char *controller;
1067 controller = bridge_get_controller(br);
1068 if ((br->controller != NULL) != (controller != NULL)) {
1069 ofproto_flush_flows(br->ofproto);
1071 free(br->controller);
1072 br->controller = controller ? xstrdup(controller) : NULL;
1075 const char *fail_mode;
1076 int max_backoff, probe;
1077 int rate_limit, burst_limit;
1079 if (!strcmp(controller, "discover")) {
1080 ofproto_set_discovery(br->ofproto, true,
1081 cfg_get_string(0, "%s.accept-regex", pfx),
1082 cfg_get_bool(0, "%s.update-resolv.conf",
1085 struct netdev *netdev;
1089 in_band = (!cfg_is_valid(CFG_BOOL | CFG_REQUIRED,
1091 || cfg_get_bool(0, "%s.in-band", pfx));
1092 ofproto_set_discovery(br->ofproto, false, NULL, NULL);
1093 ofproto_set_in_band(br->ofproto, in_band);
1095 error = netdev_open(br->name, NETDEV_ETH_TYPE_NONE, &netdev);
1097 if (cfg_is_valid(CFG_IP | CFG_REQUIRED, "%s.ip", pfx)) {
1098 struct in_addr ip, mask, gateway;
1099 ip.s_addr = cfg_get_ip(0, "%s.ip", pfx);
1100 mask.s_addr = cfg_get_ip(0, "%s.netmask", pfx);
1101 gateway.s_addr = cfg_get_ip(0, "%s.gateway", pfx);
1103 netdev_turn_flags_on(netdev, NETDEV_UP, true);
1105 mask.s_addr = guess_netmask(ip.s_addr);
1107 if (!netdev_set_in4(netdev, ip, mask)) {
1108 VLOG_INFO("bridge %s: configured IP address "IP_FMT", "
1110 br->name, IP_ARGS(&ip.s_addr),
1111 IP_ARGS(&mask.s_addr));
1114 if (gateway.s_addr) {
1115 if (!netdev_add_router(gateway)) {
1116 VLOG_INFO("bridge %s: configured gateway "IP_FMT,
1117 br->name, IP_ARGS(&gateway.s_addr));
1121 netdev_close(netdev);
1125 fail_mode = cfg_get_string(0, "%s.fail-mode", pfx);
1127 fail_mode = cfg_get_string(0, "mgmt.fail-mode");
1129 ofproto_set_failure(br->ofproto,
1131 || !strcmp(fail_mode, "standalone")
1132 || !strcmp(fail_mode, "open")));
1134 probe = cfg_get_int(0, "%s.inactivity-probe", pfx);
1136 probe = cfg_get_int(0, "mgmt.inactivity-probe");
1141 ofproto_set_probe_interval(br->ofproto, probe);
1143 max_backoff = cfg_get_int(0, "%s.max-backoff", pfx);
1145 max_backoff = cfg_get_int(0, "mgmt.max-backoff");
1150 ofproto_set_max_backoff(br->ofproto, max_backoff);
1152 rate_limit = cfg_get_int(0, "%s.rate-limit", pfx);
1154 rate_limit = cfg_get_int(0, "mgmt.rate-limit");
1156 burst_limit = cfg_get_int(0, "%s.burst-limit", pfx);
1158 burst_limit = cfg_get_int(0, "mgmt.burst-limit");
1160 ofproto_set_rate_limit(br->ofproto, rate_limit, burst_limit);
1162 ofproto_set_stp(br->ofproto, cfg_get_bool(0, "%s.stp", pfx));
1164 if (cfg_has("%s.commands.acl", pfx)) {
1165 struct svec command_acls;
1168 svec_init(&command_acls);
1169 cfg_get_all_strings(&command_acls, "%s.commands.acl", pfx);
1170 command_acl = svec_join(&command_acls, ",", "");
1172 ofproto_set_remote_execution(br->ofproto, command_acl,
1173 cfg_get_string(0, "%s.commands.dir",
1176 svec_destroy(&command_acls);
1179 ofproto_set_remote_execution(br->ofproto, NULL, NULL);
1182 union ofp_action action;
1185 /* Set up a flow that matches every packet and directs them to
1186 * OFPP_NORMAL (which goes to us). */
1187 memset(&action, 0, sizeof action);
1188 action.type = htons(OFPAT_OUTPUT);
1189 action.output.len = htons(sizeof action);
1190 action.output.port = htons(OFPP_NORMAL);
1191 memset(&flow, 0, sizeof flow);
1192 ofproto_add_flow(br->ofproto, &flow, OFPFW_ALL, 0,
1195 ofproto_set_in_band(br->ofproto, false);
1196 ofproto_set_max_backoff(br->ofproto, 1);
1197 ofproto_set_probe_interval(br->ofproto, 5);
1198 ofproto_set_failure(br->ofproto, false);
1199 ofproto_set_stp(br->ofproto, false);
1203 ofproto_set_controller(br->ofproto, br->controller);
1207 bridge_get_all_ifaces(const struct bridge *br, struct svec *ifaces)
1212 for (i = 0; i < br->n_ports; i++) {
1213 struct port *port = br->ports[i];
1214 for (j = 0; j < port->n_ifaces; j++) {
1215 struct iface *iface = port->ifaces[j];
1216 svec_add(ifaces, iface->name);
1220 assert(svec_is_unique(ifaces));
1223 /* For robustness, in case the administrator moves around datapath ports behind
1224 * our back, we re-check all the datapath port numbers here.
1226 * This function will set the 'dp_ifidx' members of interfaces that have
1227 * disappeared to -1, so only call this function from a context where those
1228 * 'struct iface's will be removed from the bridge. Otherwise, the -1
1229 * 'dp_ifidx'es will cause trouble later when we try to send them to the
1230 * datapath, which doesn't support UINT16_MAX+1 ports. */
1232 bridge_fetch_dp_ifaces(struct bridge *br)
1234 struct odp_port *dpif_ports;
1235 size_t n_dpif_ports;
1238 /* Reset all interface numbers. */
1239 for (i = 0; i < br->n_ports; i++) {
1240 struct port *port = br->ports[i];
1241 for (j = 0; j < port->n_ifaces; j++) {
1242 struct iface *iface = port->ifaces[j];
1243 iface->dp_ifidx = -1;
1246 port_array_clear(&br->ifaces);
1248 dpif_port_list(&br->dpif, &dpif_ports, &n_dpif_ports);
1249 for (i = 0; i < n_dpif_ports; i++) {
1250 struct odp_port *p = &dpif_ports[i];
1251 struct iface *iface = iface_lookup(br, p->devname);
1253 if (iface->dp_ifidx >= 0) {
1254 VLOG_WARN("dp%u reported interface %s twice",
1255 dpif_id(&br->dpif), p->devname);
1256 } else if (iface_from_dp_ifidx(br, p->port)) {
1257 VLOG_WARN("dp%u reported interface %"PRIu16" twice",
1258 dpif_id(&br->dpif), p->port);
1260 port_array_set(&br->ifaces, p->port, iface);
1261 iface->dp_ifidx = p->port;
1268 /* Bridge packet processing functions. */
1271 bond_hash(const uint8_t mac[ETH_ADDR_LEN])
1273 return hash_bytes(mac, ETH_ADDR_LEN, 0) & BOND_MASK;
1276 static struct bond_entry *
1277 lookup_bond_entry(const struct port *port, const uint8_t mac[ETH_ADDR_LEN])
1279 return &port->bond_hash[bond_hash(mac)];
1283 bond_choose_iface(const struct port *port)
1286 for (i = 0; i < port->n_ifaces; i++) {
1287 if (port->ifaces[i]->enabled) {
1295 choose_output_iface(const struct port *port, const uint8_t *dl_src,
1296 uint16_t *dp_ifidx, tag_type *tags)
1298 struct iface *iface;
1300 assert(port->n_ifaces);
1301 if (port->n_ifaces == 1) {
1302 iface = port->ifaces[0];
1304 struct bond_entry *e = lookup_bond_entry(port, dl_src);
1305 if (e->iface_idx < 0 || e->iface_idx >= port->n_ifaces
1306 || !port->ifaces[e->iface_idx]->enabled) {
1307 /* XXX select interface properly. The current interface selection
1308 * is only good for testing the rebalancing code. */
1309 e->iface_idx = bond_choose_iface(port);
1310 if (e->iface_idx < 0) {
1311 *tags |= port->no_ifaces_tag;
1314 e->iface_tag = tag_create_random();
1316 *tags |= e->iface_tag;
1317 iface = port->ifaces[e->iface_idx];
1319 *dp_ifidx = iface->dp_ifidx;
1320 *tags |= iface->tag; /* Currently only used for bonding. */
1325 bond_link_status_update(struct iface *iface, bool carrier)
1327 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1328 struct port *port = iface->port;
1330 if ((carrier == iface->enabled) == (iface->delay_expires == LLONG_MAX)) {
1331 /* Nothing to do. */
1334 VLOG_INFO_RL(&rl, "interface %s: carrier %s",
1335 iface->name, carrier ? "detected" : "dropped");
1336 if (carrier == iface->enabled) {
1337 iface->delay_expires = LLONG_MAX;
1338 VLOG_INFO_RL(&rl, "interface %s: will not be %s",
1339 iface->name, carrier ? "disabled" : "enabled");
1341 int delay = carrier ? port->updelay : port->downdelay;
1342 iface->delay_expires = time_msec() + delay;
1345 "interface %s: will be %s if it stays %s for %d ms",
1347 carrier ? "enabled" : "disabled",
1348 carrier ? "up" : "down",
1355 bond_choose_active_iface(struct port *port)
1357 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1359 port->active_iface = bond_choose_iface(port);
1360 port->active_iface_tag = tag_create_random();
1361 if (port->active_iface >= 0) {
1362 VLOG_INFO_RL(&rl, "port %s: active interface is now %s",
1363 port->name, port->ifaces[port->active_iface]->name);
1365 VLOG_WARN_RL(&rl, "port %s: all ports disabled, no active interface",
1371 bond_enable_slave(struct iface *iface, bool enable)
1373 struct port *port = iface->port;
1374 struct bridge *br = port->bridge;
1376 iface->delay_expires = LLONG_MAX;
1377 if (enable == iface->enabled) {
1381 iface->enabled = enable;
1382 if (!iface->enabled) {
1383 VLOG_WARN("interface %s: enabled", iface->name);
1384 ofproto_revalidate(br->ofproto, iface->tag);
1385 if (iface->port_ifidx == port->active_iface) {
1386 ofproto_revalidate(br->ofproto,
1387 port->active_iface_tag);
1388 bond_choose_active_iface(port);
1390 bond_send_learning_packets(port);
1392 VLOG_WARN("interface %s: disabled", iface->name);
1393 if (port->active_iface < 0) {
1394 ofproto_revalidate(br->ofproto, port->no_ifaces_tag);
1395 bond_choose_active_iface(port);
1396 bond_send_learning_packets(port);
1398 iface->tag = tag_create_random();
1403 bond_run(struct bridge *br)
1407 for (i = 0; i < br->n_ports; i++) {
1408 struct port *port = br->ports[i];
1409 if (port->n_ifaces < 2) {
1412 for (j = 0; j < port->n_ifaces; j++) {
1413 struct iface *iface = port->ifaces[j];
1414 if (time_msec() >= iface->delay_expires) {
1415 bond_enable_slave(iface, !iface->enabled);
1422 bond_wait(struct bridge *br)
1426 for (i = 0; i < br->n_ports; i++) {
1427 struct port *port = br->ports[i];
1428 if (port->n_ifaces < 2) {
1431 for (j = 0; j < port->n_ifaces; j++) {
1432 struct iface *iface = port->ifaces[j];
1433 if (iface->delay_expires != LLONG_MAX) {
1434 poll_timer_wait(iface->delay_expires - time_msec());
1441 set_dst(struct dst *p, const flow_t *flow,
1442 const struct port *in_port, const struct port *out_port,
1447 * XXX This uses too many tags: any broadcast flow will get one tag per
1448 * destination port, and thus a broadcast on a switch of any size is likely
1449 * to have all tag bits set. We should figure out a way to be smarter.
1451 * This is OK when STP is disabled, because stp_state_tag is 0 then. */
1452 *tags |= out_port->stp_state_tag;
1453 if (!(out_port->stp_state & (STP_DISABLED | STP_FORWARDING))) {
1457 p->vlan = (out_port->vlan >= 0 ? OFP_VLAN_NONE
1458 : in_port->vlan >= 0 ? in_port->vlan
1459 : ntohs(flow->dl_vlan));
1460 return choose_output_iface(out_port, flow->dl_src, &p->dp_ifidx, tags);
1464 swap_dst(struct dst *p, struct dst *q)
1466 struct dst tmp = *p;
1471 /* Moves all the dsts with vlan == 'vlan' to the front of the 'n_dsts' in
1472 * 'dsts'. (This may help performance by reducing the number of VLAN changes
1473 * that we push to the datapath. We could in fact fully sort the array by
1474 * vlan, but in most cases there are at most two different vlan tags so that's
1475 * possibly overkill.) */
1477 partition_dsts(struct dst *dsts, size_t n_dsts, int vlan)
1479 struct dst *first = dsts;
1480 struct dst *last = dsts + n_dsts;
1482 while (first != last) {
1484 * - All dsts < first have vlan == 'vlan'.
1485 * - All dsts >= last have vlan != 'vlan'.
1486 * - first < last. */
1487 while (first->vlan == vlan) {
1488 if (++first == last) {
1493 /* Same invariants, plus one additional:
1494 * - first->vlan != vlan.
1496 while (last[-1].vlan != vlan) {
1497 if (--last == first) {
1502 /* Same invariants, plus one additional:
1503 * - last[-1].vlan == vlan.*/
1504 swap_dst(first++, --last);
1509 mirror_mask_ffs(mirror_mask_t mask)
1511 BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
1516 dst_is_duplicate(const struct dst *dsts, size_t n_dsts,
1517 const struct dst *test)
1520 for (i = 0; i < n_dsts; i++) {
1521 if (dsts[i].vlan == test->vlan && dsts[i].dp_ifidx == test->dp_ifidx) {
1529 port_trunks_vlan(const struct port *port, uint16_t vlan)
1531 return port->vlan < 0 && bitmap_is_set(port->trunks, vlan);
1535 port_includes_vlan(const struct port *port, uint16_t vlan)
1537 return vlan == port->vlan || port_trunks_vlan(port, vlan);
1541 compose_dsts(const struct bridge *br, const flow_t *flow, uint16_t vlan,
1542 const struct port *in_port, const struct port *out_port,
1543 struct dst dsts[], tag_type *tags)
1545 mirror_mask_t mirrors = in_port->src_mirrors;
1546 struct dst *dst = dsts;
1549 *tags |= in_port->stp_state_tag;
1550 if (out_port == FLOOD_PORT) {
1551 /* XXX use ODP_FLOOD if no vlans or bonding. */
1552 /* XXX even better, define each VLAN as a datapath port group */
1553 for (i = 0; i < br->n_ports; i++) {
1554 struct port *port = br->ports[i];
1555 if (port != in_port && port_includes_vlan(port, vlan)
1556 && !port->is_mirror_output_port
1557 && set_dst(dst, flow, in_port, port, tags)) {
1558 mirrors |= port->dst_mirrors;
1562 } else if (out_port && set_dst(dst, flow, in_port, out_port, tags)) {
1563 mirrors |= out_port->dst_mirrors;
1568 struct mirror *m = br->mirrors[mirror_mask_ffs(mirrors) - 1];
1569 if (!m->n_vlans || vlan_is_mirrored(m, vlan)) {
1571 if (set_dst(dst, flow, in_port, m->out_port, tags)
1572 && !dst_is_duplicate(dsts, dst - dsts, dst)) {
1576 for (i = 0; i < br->n_ports; i++) {
1577 struct port *port = br->ports[i];
1578 if (port_includes_vlan(port, m->out_vlan)
1579 && set_dst(dst, flow, in_port, port, tags)
1580 && !dst_is_duplicate(dsts, dst - dsts, dst))
1582 if (port->vlan < 0) {
1583 dst->vlan = m->out_vlan;
1585 if (dst->dp_ifidx == flow->in_port
1586 && dst->vlan == vlan) {
1587 /* Don't send out input port on same VLAN. */
1595 mirrors &= mirrors - 1;
1598 partition_dsts(dsts, dst - dsts, ntohs(flow->dl_vlan));
1603 print_dsts(const struct dst *dsts, size_t n)
1605 for (; n--; dsts++) {
1606 printf(">p%"PRIu16, dsts->dp_ifidx);
1607 if (dsts->vlan != OFP_VLAN_NONE) {
1608 printf("v%"PRIu16, dsts->vlan);
1614 compose_actions(struct bridge *br, const flow_t *flow, uint16_t vlan,
1615 const struct port *in_port, const struct port *out_port,
1616 tag_type *tags, struct odp_actions *actions)
1618 struct dst dsts[DP_MAX_PORTS * (MAX_MIRRORS + 1)];
1620 const struct dst *p;
1623 n_dsts = compose_dsts(br, flow, vlan, in_port, out_port, dsts, tags);
1625 cur_vlan = ntohs(flow->dl_vlan);
1626 for (p = dsts; p < &dsts[n_dsts]; p++) {
1627 union odp_action *a;
1628 if (p->vlan != cur_vlan) {
1629 if (p->vlan == OFP_VLAN_NONE) {
1630 odp_actions_add(actions, ODPAT_STRIP_VLAN);
1632 a = odp_actions_add(actions, ODPAT_SET_VLAN_VID);
1633 a->vlan_vid.vlan_vid = htons(p->vlan);
1637 a = odp_actions_add(actions, ODPAT_OUTPUT);
1638 a->output.port = p->dp_ifidx;
1643 is_bcast_arp_reply(const flow_t *flow, const struct ofpbuf *packet)
1645 struct arp_eth_header *arp = (struct arp_eth_header *) packet->data;
1646 return (flow->dl_type == htons(ETH_TYPE_ARP)
1647 && eth_addr_is_broadcast(flow->dl_dst)
1648 && packet->size >= sizeof(struct arp_eth_header)
1649 && arp->ar_op == ARP_OP_REQUEST);
1652 /* If the composed actions may be applied to any packet in the given 'flow',
1653 * returns true. Otherwise, the actions should only be applied to 'packet', or
1654 * not at all, if 'packet' was NULL. */
1656 process_flow(struct bridge *br, const flow_t *flow,
1657 const struct ofpbuf *packet, struct odp_actions *actions,
1660 struct iface *in_iface;
1661 struct port *in_port;
1662 struct port *out_port = NULL; /* By default, drop the packet/flow. */
1665 /* Find the interface and port structure for the received packet. */
1666 in_iface = iface_from_dp_ifidx(br, flow->in_port);
1668 /* No interface? Something fishy... */
1669 if (packet != NULL) {
1670 /* Odd. A few possible reasons here:
1672 * - We deleted an interface but there are still a few packets
1673 * queued up from it.
1675 * - Someone externally added an interface (e.g. with "ovs-dpctl
1676 * add-if") that we don't know about.
1678 * - Packet arrived on the local port but the local port is not
1679 * one of our bridge ports.
1681 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1683 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
1684 "interface %"PRIu16, br->name, flow->in_port);
1687 /* Return without adding any actions, to drop packets on this flow. */
1690 in_port = in_iface->port;
1692 /* Figure out what VLAN this packet belongs to.
1694 * Note that dl_vlan of 0 and of OFP_VLAN_NONE both mean that the packet
1695 * belongs to VLAN 0, so we should treat both cases identically. (In the
1696 * former case, the packet has an 802.1Q header that specifies VLAN 0,
1697 * presumably to allow a priority to be specified. In the latter case, the
1698 * packet does not have any 802.1Q header.) */
1699 vlan = ntohs(flow->dl_vlan);
1700 if (vlan == OFP_VLAN_NONE) {
1703 if (in_port->vlan >= 0) {
1705 /* XXX support double tagging? */
1706 if (packet != NULL) {
1707 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1708 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
1709 "packet received on port %s configured with "
1710 "implicit VLAN %"PRIu16,
1711 br->name, ntohs(flow->dl_vlan),
1712 in_port->name, in_port->vlan);
1716 vlan = in_port->vlan;
1718 if (!port_includes_vlan(in_port, vlan)) {
1719 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1720 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
1721 "packet received on port %s not configured for "
1723 br->name, vlan, in_port->name, vlan);
1728 /* Drop frames for ports that STP wants entirely killed (both for
1729 * forwarding and for learning). Later, after we do learning, we'll drop
1730 * the frames that STP wants to do learning but not forwarding on. */
1731 if (in_port->stp_state & (STP_LISTENING | STP_BLOCKING)) {
1735 /* Drop frames for reserved multicast addresses. */
1736 if (eth_addr_is_reserved(flow->dl_dst)) {
1740 /* Drop frames on ports reserved for mirroring. */
1741 if (in_port->is_mirror_output_port) {
1742 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1743 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port %s, "
1744 "which is reserved exclusively for mirroring",
1745 br->name, in_port->name);
1749 /* Multicast (and broadcast) packets on bonds need special attention, to
1750 * avoid receiving duplicates. */
1751 if (in_port->n_ifaces > 1 && eth_addr_is_multicast(flow->dl_dst)) {
1752 *tags |= in_port->active_iface_tag;
1753 if (in_port->active_iface != in_iface->port_ifidx) {
1754 /* Drop all multicast packets on inactive slaves. */
1757 /* Drop all multicast packets for which we have learned a different
1758 * input port, because we probably sent the packet on one slaves
1759 * and got it back on the active slave. Broadcast ARP replies are
1760 * an exception to this rule: the host has moved to another
1762 int src_idx = mac_learning_lookup(br->ml, flow->dl_src, vlan);
1763 if (src_idx != -1 && src_idx != in_port->port_idx) {
1765 if (!is_bcast_arp_reply(flow, packet)) {
1769 /* No way to know whether it's an ARP reply, because the
1770 * flow entry doesn't include enough information and we
1771 * don't have a packet. Punt. */
1779 out_port = FLOOD_PORT;
1783 /* Learn source MAC (but don't try to learn from revalidation). */
1785 tag_type rev_tag = mac_learning_learn(br->ml, flow->dl_src,
1786 vlan, in_port->port_idx);
1788 /* The log messages here could actually be useful in debugging,
1789 * so keep the rate limit relatively high. */
1790 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30,
1792 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
1793 "on port %s in VLAN %d",
1794 br->name, ETH_ADDR_ARGS(flow->dl_src),
1795 in_port->name, vlan);
1796 ofproto_revalidate(br->ofproto, rev_tag);
1800 /* Determine output port. */
1801 out_port_idx = mac_learning_lookup_tag(br->ml, flow->dl_dst, vlan,
1803 if (out_port_idx >= 0 && out_port_idx < br->n_ports) {
1804 out_port = br->ports[out_port_idx];
1808 /* Don't send packets out their input ports. Don't forward frames that STP
1809 * wants us to discard. */
1810 if (in_port == out_port || in_port->stp_state == STP_LEARNING) {
1815 compose_actions(br, flow, vlan, in_port, out_port, tags, actions);
1818 * We send out only a single packet, instead of setting up a flow, if the
1819 * packet is an ARP directed to broadcast that arrived on a bonded
1820 * interface. In such a situation ARP requests and replies must be handled
1821 * differently, but OpenFlow unfortunately can't distinguish them.
1823 return (in_port->n_ifaces < 2
1824 || flow->dl_type != htons(ETH_TYPE_ARP)
1825 || !eth_addr_is_broadcast(flow->dl_dst));
1828 /* Careful: 'opp' is in host byte order and opp->port_no is an OFP port
1831 bridge_port_changed_ofhook_cb(enum ofp_port_reason reason,
1832 const struct ofp_phy_port *opp,
1835 struct bridge *br = br_;
1836 struct iface *iface;
1839 iface = iface_from_dp_ifidx(br, ofp_port_to_odp_port(opp->port_no));
1845 if (reason == OFPPR_DELETE) {
1846 VLOG_WARN("bridge %s: interface %s deleted unexpectedly",
1847 br->name, iface->name);
1848 iface_destroy(iface);
1849 if (!port->n_ifaces) {
1850 VLOG_WARN("bridge %s: port %s has no interfaces, dropping",
1851 br->name, port->name);
1857 memcpy(iface->mac, opp->hw_addr, ETH_ADDR_LEN);
1858 if (port->n_ifaces > 1) {
1859 bool up = !(opp->state & OFPPS_LINK_DOWN);
1860 bond_link_status_update(iface, up);
1861 port_update_bond_compat(port);
1867 bridge_normal_ofhook_cb(const flow_t *flow, const struct ofpbuf *packet,
1868 struct odp_actions *actions, tag_type *tags, void *br_)
1870 struct bridge *br = br_;
1873 if (flow->dl_type == htons(OFP_DL_TYPE_NOT_ETH_TYPE)
1874 && eth_addr_equals(flow->dl_dst, stp_eth_addr)) {
1875 brstp_receive(br, flow, payload);
1880 COVERAGE_INC(bridge_process_flow);
1881 return process_flow(br, flow, packet, actions, tags);
1885 bridge_account_flow_ofhook_cb(const flow_t *flow,
1886 const union odp_action *actions,
1887 size_t n_actions, unsigned long long int n_bytes,
1890 struct bridge *br = br_;
1891 const union odp_action *a;
1893 if (!br->has_bonded_ports) {
1897 for (a = actions; a < &actions[n_actions]; a++) {
1898 if (a->type == ODPAT_OUTPUT) {
1899 struct port *port = port_from_dp_ifidx(br, a->output.port);
1900 if (port && port->n_ifaces >= 2) {
1901 struct bond_entry *e = lookup_bond_entry(port, flow->dl_src);
1902 e->tx_bytes += n_bytes;
1909 bridge_account_checkpoint_ofhook_cb(void *br_)
1911 struct bridge *br = br_;
1914 if (!br->has_bonded_ports) {
1918 /* The current ofproto implementation calls this callback at least once a
1919 * second, so this timer implementation is sufficient. */
1920 if (time_msec() < br->bond_next_rebalance) {
1923 br->bond_next_rebalance = time_msec() + 10000;
1925 for (i = 0; i < br->n_ports; i++) {
1926 struct port *port = br->ports[i];
1927 if (port->n_ifaces > 1) {
1928 bond_rebalance_port(port);
1933 static struct ofhooks bridge_ofhooks = {
1934 bridge_port_changed_ofhook_cb,
1935 bridge_normal_ofhook_cb,
1936 bridge_account_flow_ofhook_cb,
1937 bridge_account_checkpoint_ofhook_cb,
1940 /* Bonding functions. */
1942 /* Statistics for a single interface on a bonded port, used for load-based
1943 * bond rebalancing. */
1944 struct slave_balance {
1945 struct iface *iface; /* The interface. */
1946 uint64_t tx_bytes; /* Sum of hashes[*]->tx_bytes. */
1948 /* All the "bond_entry"s that are assigned to this interface, in order of
1949 * increasing tx_bytes. */
1950 struct bond_entry **hashes;
1954 /* Sorts pointers to pointers to bond_entries in ascending order by the
1955 * interface to which they are assigned, and within a single interface in
1956 * ascending order of bytes transmitted. */
1958 compare_bond_entries(const void *a_, const void *b_)
1960 const struct bond_entry *const *ap = a_;
1961 const struct bond_entry *const *bp = b_;
1962 const struct bond_entry *a = *ap;
1963 const struct bond_entry *b = *bp;
1964 if (a->iface_idx != b->iface_idx) {
1965 return a->iface_idx > b->iface_idx ? 1 : -1;
1966 } else if (a->tx_bytes != b->tx_bytes) {
1967 return a->tx_bytes > b->tx_bytes ? 1 : -1;
1973 /* Sorts slave_balances so that enabled ports come first, and otherwise in
1974 * *descending* order by number of bytes transmitted. */
1976 compare_slave_balance(const void *a_, const void *b_)
1978 const struct slave_balance *a = a_;
1979 const struct slave_balance *b = b_;
1980 if (a->iface->enabled != b->iface->enabled) {
1981 return a->iface->enabled ? -1 : 1;
1982 } else if (a->tx_bytes != b->tx_bytes) {
1983 return a->tx_bytes > b->tx_bytes ? -1 : 1;
1990 swap_bals(struct slave_balance *a, struct slave_balance *b)
1992 struct slave_balance tmp = *a;
1997 /* Restores the 'n_bals' slave_balance structures in 'bals' to sorted order
1998 * given that 'p' (and only 'p') might be in the wrong location.
2000 * This function invalidates 'p', since it might now be in a different memory
2003 resort_bals(struct slave_balance *p,
2004 struct slave_balance bals[], size_t n_bals)
2007 for (; p > bals && p->tx_bytes > p[-1].tx_bytes; p--) {
2008 swap_bals(p, p - 1);
2010 for (; p < &bals[n_bals - 1] && p->tx_bytes < p[1].tx_bytes; p++) {
2011 swap_bals(p, p + 1);
2017 log_bals(const struct slave_balance *bals, size_t n_bals, struct port *port)
2019 if (VLOG_IS_DBG_ENABLED()) {
2020 struct ds ds = DS_EMPTY_INITIALIZER;
2021 const struct slave_balance *b;
2023 for (b = bals; b < bals + n_bals; b++) {
2027 ds_put_char(&ds, ',');
2029 ds_put_format(&ds, " %s %"PRIu64"kB",
2030 b->iface->name, b->tx_bytes / 1024);
2032 if (!b->iface->enabled) {
2033 ds_put_cstr(&ds, " (disabled)");
2035 if (b->n_hashes > 0) {
2036 ds_put_cstr(&ds, " (");
2037 for (i = 0; i < b->n_hashes; i++) {
2038 const struct bond_entry *e = b->hashes[i];
2040 ds_put_cstr(&ds, " + ");
2042 ds_put_format(&ds, "h%td: %"PRIu64"kB",
2043 e - port->bond_hash, e->tx_bytes / 1024);
2045 ds_put_cstr(&ds, ")");
2048 VLOG_DBG("bond %s:%s", port->name, ds_cstr(&ds));
2053 /* Shifts 'hash' from 'from' to 'to' within 'port'. */
2055 bond_shift_load(struct slave_balance *from, struct slave_balance *to,
2056 struct bond_entry *hash)
2058 struct port *port = from->iface->port;
2059 uint64_t delta = hash->tx_bytes;
2061 VLOG_INFO("bond %s: shift %"PRIu64"kB of load (with hash %td) "
2062 "from %s to %s (now carrying %"PRIu64"kB and "
2063 "%"PRIu64"kB load, respectively)",
2064 port->name, delta / 1024, hash - port->bond_hash,
2065 from->iface->name, to->iface->name,
2066 (from->tx_bytes - delta) / 1024,
2067 (to->tx_bytes + delta) / 1024);
2069 /* Delete element from from->hashes.
2071 * We don't bother to add the element to to->hashes because not only would
2072 * it require more work, the only purpose it would be to allow that hash to
2073 * be migrated to another slave in this rebalancing run, and there is no
2074 * point in doing that. */
2075 if (from->hashes[0] == hash) {
2078 int i = hash - from->hashes[0];
2079 memmove(from->hashes + i, from->hashes + i + 1,
2080 (from->n_hashes - (i + 1)) * sizeof *from->hashes);
2084 /* Shift load away from 'from' to 'to'. */
2085 from->tx_bytes -= delta;
2086 to->tx_bytes += delta;
2088 /* Arrange for flows to be revalidated. */
2089 ofproto_revalidate(port->bridge->ofproto, hash->iface_tag);
2090 hash->iface_idx = to->iface->port_ifidx;
2091 hash->iface_tag = tag_create_random();
2095 bond_rebalance_port(struct port *port)
2097 struct slave_balance bals[DP_MAX_PORTS];
2099 struct bond_entry *hashes[BOND_MASK + 1];
2100 struct slave_balance *b, *from, *to;
2101 struct bond_entry *e;
2104 /* Sets up 'bals' to describe each of the port's interfaces, sorted in
2105 * descending order of tx_bytes, so that bals[0] represents the most
2106 * heavily loaded slave and bals[n_bals - 1] represents the least heavily
2109 * The code is a bit tricky: to avoid dynamically allocating a 'hashes'
2110 * array for each slave_balance structure, we sort our local array of
2111 * hashes in order by slave, so that all of the hashes for a given slave
2112 * become contiguous in memory, and then we point each 'hashes' members of
2113 * a slave_balance structure to the start of a contiguous group. */
2114 n_bals = port->n_ifaces;
2115 for (b = bals; b < &bals[n_bals]; b++) {
2116 b->iface = port->ifaces[b - bals];
2121 for (i = 0; i <= BOND_MASK; i++) {
2122 hashes[i] = &port->bond_hash[i];
2124 qsort(hashes, BOND_MASK + 1, sizeof *hashes, compare_bond_entries);
2125 for (i = 0; i <= BOND_MASK; i++) {
2127 if (e->iface_idx >= 0 && e->iface_idx < port->n_ifaces) {
2128 b = &bals[e->iface_idx];
2129 b->tx_bytes += e->tx_bytes;
2131 b->hashes = &hashes[i];
2136 qsort(bals, n_bals, sizeof *bals, compare_slave_balance);
2137 log_bals(bals, n_bals, port);
2139 /* Discard slaves that aren't enabled (which were sorted to the back of the
2140 * array earlier). */
2141 while (!bals[n_bals - 1].iface->enabled) {
2148 /* Shift load from the most-loaded slaves to the least-loaded slaves. */
2149 to = &bals[n_bals - 1];
2150 for (from = bals; from < to; ) {
2151 uint64_t overload = from->tx_bytes - to->tx_bytes;
2152 if (overload < to->tx_bytes >> 5 || overload < 100000) {
2153 /* The extra load on 'from' (and all less-loaded slaves), compared
2154 * to that of 'to' (the least-loaded slave), is less than ~3%, or
2155 * it is less than ~1Mbps. No point in rebalancing. */
2157 } else if (from->n_hashes == 1) {
2158 /* 'from' only carries a single MAC hash, so we can't shift any
2159 * load away from it, even though we want to. */
2162 /* 'from' is carrying significantly more load than 'to', and that
2163 * load is split across at least two different hashes. Pick a hash
2164 * to migrate to 'to' (the least-loaded slave), given that doing so
2165 * must not cause 'to''s load to exceed 'from''s load.
2167 * The sort order we use means that we prefer to shift away the
2168 * smallest hashes instead of the biggest ones. There is little
2169 * reason behind this decision; we could use the opposite sort
2170 * order to shift away big hashes ahead of small ones. */
2173 for (i = 0; i < from->n_hashes; i++) {
2174 uint64_t delta = from->hashes[i]->tx_bytes;
2175 if (to->tx_bytes + delta < from->tx_bytes - delta) {
2179 if (i < from->n_hashes) {
2180 bond_shift_load(from, to, from->hashes[i]);
2182 /* Re-sort 'bals'. Note that this may make 'from' and 'to'
2183 * point to different slave_balance structures. It is only
2184 * valid to do these two operations in a row at all because we
2185 * know that 'from' will not move past 'to' and vice versa. */
2186 resort_bals(from, bals, n_bals);
2187 resort_bals(to, bals, n_bals);
2194 /* Implement exponentially weighted moving average. A weight of 1/2 causes
2195 * historical data to decay to <1% in 7 rebalancing runs. */
2196 for (e = &port->bond_hash[0]; e <= &port->bond_hash[BOND_MASK]; e++) {
2202 bond_send_learning_packets(struct port *port)
2204 struct bridge *br = port->bridge;
2205 struct mac_entry *e;
2206 struct ofpbuf packet;
2207 int error, n_packets, n_errors;
2209 if (!port->n_ifaces || port->active_iface < 0 || !br->ml) {
2213 ofpbuf_init(&packet, 128);
2214 error = n_packets = n_errors = 0;
2215 LIST_FOR_EACH (e, struct mac_entry, lru_node, &br->ml->lrus) {
2216 static const char s[] = "Open vSwitch Bond Failover";
2217 union ofp_action actions[2], *a;
2218 struct eth_header *eth;
2219 struct llc_snap_header *llc_snap;
2225 if (e->port == port->port_idx
2226 || !choose_output_iface(port, e->mac, &dp_ifidx, &tags)) {
2230 /* Compose packet to send. */
2231 ofpbuf_clear(&packet);
2232 eth = ofpbuf_put_zeros(&packet, ETH_HEADER_LEN);
2233 llc_snap = ofpbuf_put_zeros(&packet, LLC_SNAP_HEADER_LEN);
2234 ofpbuf_put(&packet, s, sizeof s); /* Includes null byte. */
2235 ofpbuf_put(&packet, e->mac, ETH_ADDR_LEN);
2237 memcpy(eth->eth_dst, eth_addr_broadcast, ETH_ADDR_LEN);
2238 memcpy(eth->eth_src, e->mac, ETH_ADDR_LEN);
2239 eth->eth_type = htons(packet.size - ETH_HEADER_LEN);
2241 llc_snap->llc.llc_dsap = LLC_DSAP_SNAP;
2242 llc_snap->llc.llc_ssap = LLC_SSAP_SNAP;
2243 llc_snap->llc.llc_cntl = LLC_CNTL_SNAP;
2244 memcpy(llc_snap->snap.snap_org, "\x00\x23\x20", 3);
2245 llc_snap->snap.snap_type = htons(0xf177); /* Random number. */
2247 /* Compose actions. */
2248 memset(actions, 0, sizeof actions);
2251 a->vlan_vid.type = htons(OFPAT_SET_VLAN_VID);
2252 a->vlan_vid.len = htons(sizeof *a);
2253 a->vlan_vid.vlan_vid = htons(e->vlan);
2256 a->output.type = htons(OFPAT_OUTPUT);
2257 a->output.len = htons(sizeof *a);
2258 a->output.port = htons(odp_port_to_ofp_port(dp_ifidx));
2263 flow_extract(&packet, ODPP_NONE, &flow);
2264 retval = ofproto_send_packet(br->ofproto, &flow, actions, a - actions,
2271 ofpbuf_uninit(&packet);
2274 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2275 VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
2276 "packets, last error was: %s",
2277 port->name, n_errors, n_packets, strerror(error));
2279 VLOG_DBG("bond %s: sent %d gratuitous learning packets",
2280 port->name, n_packets);
2284 /* Bonding unixctl user interface functions. */
2287 bond_unixctl_list(struct unixctl_conn *conn, const char *args UNUSED)
2289 struct ds ds = DS_EMPTY_INITIALIZER;
2290 const struct bridge *br;
2292 ds_put_cstr(&ds, "bridge\tbond\tslaves\n");
2294 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
2297 for (i = 0; i < br->n_ports; i++) {
2298 const struct port *port = br->ports[i];
2299 if (port->n_ifaces > 1) {
2302 ds_put_format(&ds, "%s\t%s\t", br->name, port->name);
2303 for (j = 0; j < port->n_ifaces; j++) {
2304 const struct iface *iface = port->ifaces[j];
2306 ds_put_cstr(&ds, ", ");
2308 ds_put_cstr(&ds, iface->name);
2310 ds_put_char(&ds, '\n');
2314 unixctl_command_reply(conn, 200, ds_cstr(&ds));
2318 static struct port *
2319 bond_find(const char *name)
2321 const struct bridge *br;
2323 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
2326 for (i = 0; i < br->n_ports; i++) {
2327 struct port *port = br->ports[i];
2328 if (!strcmp(port->name, name) && port->n_ifaces > 1) {
2337 bond_unixctl_show(struct unixctl_conn *conn, const char *args)
2339 struct ds ds = DS_EMPTY_INITIALIZER;
2340 const struct port *port;
2343 port = bond_find(args);
2345 unixctl_command_reply(conn, 501, "no such bond");
2349 ds_put_format(&ds, "updelay: %d ms\n", port->updelay);
2350 ds_put_format(&ds, "downdelay: %d ms\n", port->downdelay);
2351 ds_put_format(&ds, "next rebalance: %lld ms\n",
2352 port->bridge->bond_next_rebalance - time_msec());
2353 for (j = 0; j < port->n_ifaces; j++) {
2354 const struct iface *iface = port->ifaces[j];
2355 struct bond_entry *be;
2358 ds_put_format(&ds, "slave %s: %s\n",
2359 iface->name, iface->enabled ? "enabled" : "disabled");
2360 if (j == port->active_iface) {
2361 ds_put_cstr(&ds, "\tactive slave\n");
2363 if (iface->delay_expires != LLONG_MAX) {
2364 ds_put_format(&ds, "\t%s expires in %lld ms\n",
2365 iface->enabled ? "downdelay" : "updelay",
2366 iface->delay_expires - time_msec());
2370 for (be = port->bond_hash; be <= &port->bond_hash[BOND_MASK]; be++) {
2371 int hash = be - port->bond_hash;
2372 struct mac_entry *me;
2374 if (be->iface_idx != j) {
2378 ds_put_format(&ds, "\thash %d: %lld kB load\n",
2379 hash, be->tx_bytes / 1024);
2382 if (!port->bridge->ml) {
2386 LIST_FOR_EACH (me, struct mac_entry, lru_node,
2387 &port->bridge->ml->lrus) {
2390 if (bond_hash(me->mac) == hash
2391 && me->port != port->port_idx
2392 && choose_output_iface(port, me->mac, &dp_ifidx, &tags)
2393 && dp_ifidx == iface->dp_ifidx)
2395 ds_put_format(&ds, "\t\t"ETH_ADDR_FMT"\n",
2396 ETH_ADDR_ARGS(me->mac));
2401 unixctl_command_reply(conn, 200, ds_cstr(&ds));
2406 bond_unixctl_migrate(struct unixctl_conn *conn, const char *args_)
2408 char *args = (char *) args_;
2409 char *save_ptr = NULL;
2410 char *bond_s, *hash_s, *slave_s;
2411 uint8_t mac[ETH_ADDR_LEN];
2413 struct iface *iface;
2414 struct bond_entry *entry;
2417 bond_s = strtok_r(args, " ", &save_ptr);
2418 hash_s = strtok_r(NULL, " ", &save_ptr);
2419 slave_s = strtok_r(NULL, " ", &save_ptr);
2421 unixctl_command_reply(conn, 501,
2422 "usage: bond/migrate BOND HASH SLAVE");
2426 port = bond_find(bond_s);
2428 unixctl_command_reply(conn, 501, "no such bond");
2432 if (sscanf(hash_s, "%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8":%"SCNx8,
2433 &mac[0], &mac[1], &mac[2], &mac[3], &mac[4], &mac[5]) == 6) {
2434 hash = bond_hash(mac);
2435 } else if (strspn(hash_s, "0123456789") == strlen(hash_s)) {
2436 hash = atoi(hash_s) & BOND_MASK;
2438 unixctl_command_reply(conn, 501, "bad hash");
2442 iface = port_lookup_iface(port, slave_s);
2444 unixctl_command_reply(conn, 501, "no such slave");
2448 if (!iface->enabled) {
2449 unixctl_command_reply(conn, 501, "cannot migrate to disabled slave");
2453 entry = &port->bond_hash[hash];
2454 ofproto_revalidate(port->bridge->ofproto, entry->iface_tag);
2455 entry->iface_idx = iface->port_ifidx;
2456 entry->iface_tag = tag_create_random();
2457 unixctl_command_reply(conn, 200, "migrated");
2461 bond_unixctl_set_active_slave(struct unixctl_conn *conn, const char *args_)
2463 char *args = (char *) args_;
2464 char *save_ptr = NULL;
2465 char *bond_s, *slave_s;
2467 struct iface *iface;
2469 bond_s = strtok_r(args, " ", &save_ptr);
2470 slave_s = strtok_r(NULL, " ", &save_ptr);
2472 unixctl_command_reply(conn, 501,
2473 "usage: bond/set-active-slave BOND SLAVE");
2477 port = bond_find(bond_s);
2479 unixctl_command_reply(conn, 501, "no such bond");
2483 iface = port_lookup_iface(port, slave_s);
2485 unixctl_command_reply(conn, 501, "no such slave");
2489 if (!iface->enabled) {
2490 unixctl_command_reply(conn, 501, "cannot make disabled slave active");
2494 if (port->active_iface != iface->port_ifidx) {
2495 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
2496 port->active_iface = iface->port_ifidx;
2497 port->active_iface_tag = tag_create_random();
2498 VLOG_INFO("port %s: active interface is now %s",
2499 port->name, iface->name);
2500 bond_send_learning_packets(port);
2501 unixctl_command_reply(conn, 200, "done");
2503 unixctl_command_reply(conn, 200, "no change");
2508 enable_slave(struct unixctl_conn *conn, const char *args_, bool enable)
2510 char *args = (char *) args_;
2511 char *save_ptr = NULL;
2512 char *bond_s, *slave_s;
2514 struct iface *iface;
2516 bond_s = strtok_r(args, " ", &save_ptr);
2517 slave_s = strtok_r(NULL, " ", &save_ptr);
2519 unixctl_command_reply(conn, 501,
2520 "usage: bond/enable/disable-slave BOND SLAVE");
2524 port = bond_find(bond_s);
2526 unixctl_command_reply(conn, 501, "no such bond");
2530 iface = port_lookup_iface(port, slave_s);
2532 unixctl_command_reply(conn, 501, "no such slave");
2536 bond_enable_slave(iface, enable);
2537 unixctl_command_reply(conn, 501, enable ? "enabled" : "disabled");
2541 bond_unixctl_enable_slave(struct unixctl_conn *conn, const char *args)
2543 enable_slave(conn, args, true);
2547 bond_unixctl_disable_slave(struct unixctl_conn *conn, const char *args)
2549 enable_slave(conn, args, false);
2555 unixctl_command_register("bond/list", bond_unixctl_list);
2556 unixctl_command_register("bond/show", bond_unixctl_show);
2557 unixctl_command_register("bond/migrate", bond_unixctl_migrate);
2558 unixctl_command_register("bond/set-active-slave",
2559 bond_unixctl_set_active_slave);
2560 unixctl_command_register("bond/enable-slave", bond_unixctl_enable_slave);
2561 unixctl_command_register("bond/disable-slave", bond_unixctl_disable_slave);
2564 /* Port functions. */
2567 port_create(struct bridge *br, const char *name)
2571 port = xcalloc(1, sizeof *port);
2573 port->port_idx = br->n_ports;
2575 port->trunks = NULL;
2576 port->name = xstrdup(name);
2577 port->active_iface = -1;
2578 port->stp_state = STP_DISABLED;
2579 port->stp_state_tag = 0;
2581 if (br->n_ports >= br->allocated_ports) {
2582 br->ports = x2nrealloc(br->ports, &br->allocated_ports,
2585 br->ports[br->n_ports++] = port;
2587 VLOG_INFO("created port %s on bridge %s", port->name, br->name);
2592 port_reconfigure(struct port *port)
2594 bool bonded = cfg_has_section("bonding.%s", port->name);
2595 struct svec old_ifaces, new_ifaces;
2596 unsigned long *trunks;
2600 /* Collect old and new interfaces. */
2601 svec_init(&old_ifaces);
2602 svec_init(&new_ifaces);
2603 for (i = 0; i < port->n_ifaces; i++) {
2604 svec_add(&old_ifaces, port->ifaces[i]->name);
2606 svec_sort(&old_ifaces);
2608 cfg_get_all_keys(&new_ifaces, "bonding.%s.slave", port->name);
2609 if (!new_ifaces.n) {
2610 VLOG_ERR("port %s: no interfaces specified for bonded port",
2612 } else if (new_ifaces.n == 1) {
2613 VLOG_WARN("port %s: only 1 interface specified for bonded port",
2617 port->updelay = cfg_get_int(0, "bonding.%s.updelay", port->name);
2618 if (port->updelay < 0) {
2621 port->downdelay = cfg_get_int(0, "bonding.%s.downdelay", port->name);
2622 if (port->downdelay < 0) {
2623 port->downdelay = 0;
2626 svec_init(&new_ifaces);
2627 svec_add(&new_ifaces, port->name);
2630 /* Get rid of deleted interfaces and add new interfaces. */
2631 for (i = 0; i < port->n_ifaces; i++) {
2632 struct iface *iface = port->ifaces[i];
2633 if (!svec_contains(&new_ifaces, iface->name)) {
2634 iface_destroy(iface);
2639 for (i = 0; i < new_ifaces.n; i++) {
2640 const char *name = new_ifaces.names[i];
2641 if (!svec_contains(&old_ifaces, name)) {
2642 iface_create(port, name);
2648 if (cfg_has("vlan.%s.tag", port->name)) {
2650 vlan = cfg_get_vlan(0, "vlan.%s.tag", port->name);
2651 if (vlan >= 0 && vlan <= 4095) {
2652 VLOG_DBG("port %s: assigning VLAN tag %d", port->name, vlan);
2655 /* It's possible that bonded, VLAN-tagged ports make sense. Maybe
2656 * they even work as-is. But they have not been tested. */
2657 VLOG_WARN("port %s: VLAN tags not supported on bonded ports",
2661 if (port->vlan != vlan) {
2663 bridge_flush(port->bridge);
2666 /* Get trunked VLANs. */
2669 size_t n_trunks, n_errors;
2672 trunks = bitmap_allocate(4096);
2673 n_trunks = cfg_count("vlan.%s.trunks", port->name);
2675 for (i = 0; i < n_trunks; i++) {
2676 int trunk = cfg_get_vlan(i, "vlan.%s.trunks", port->name);
2678 bitmap_set1(trunks, trunk);
2684 VLOG_ERR("port %s: invalid values for %zu trunk VLANs",
2685 port->name, n_trunks);
2687 if (n_errors == n_trunks) {
2689 VLOG_ERR("port %s: no valid trunks, trunking all VLANs",
2692 bitmap_set_multiple(trunks, 0, 4096, 1);
2695 if (cfg_has("vlan.%s.trunks", port->name)) {
2696 VLOG_ERR("ignoring vlan.%s.trunks in favor of vlan.%s.vlan",
2697 port->name, port->name);
2701 ? port->trunks != NULL
2702 : port->trunks == NULL || !bitmap_equal(trunks, port->trunks, 4096)) {
2703 bridge_flush(port->bridge);
2705 bitmap_free(port->trunks);
2706 port->trunks = trunks;
2708 svec_destroy(&old_ifaces);
2709 svec_destroy(&new_ifaces);
2713 port_destroy(struct port *port)
2716 struct bridge *br = port->bridge;
2720 proc_net_compat_update_vlan(port->name, NULL, 0);
2722 for (i = 0; i < MAX_MIRRORS; i++) {
2723 struct mirror *m = br->mirrors[i];
2724 if (m && m->out_port == port) {
2729 while (port->n_ifaces > 0) {
2730 iface_destroy(port->ifaces[port->n_ifaces - 1]);
2733 del = br->ports[port->port_idx] = br->ports[--br->n_ports];
2734 del->port_idx = port->port_idx;
2737 bitmap_free(port->trunks);
2744 static struct port *
2745 port_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
2747 struct iface *iface = iface_from_dp_ifidx(br, dp_ifidx);
2748 return iface ? iface->port : NULL;
2751 static struct port *
2752 port_lookup(const struct bridge *br, const char *name)
2756 for (i = 0; i < br->n_ports; i++) {
2757 struct port *port = br->ports[i];
2758 if (!strcmp(port->name, name)) {
2765 static struct iface *
2766 port_lookup_iface(const struct port *port, const char *name)
2770 for (j = 0; j < port->n_ifaces; j++) {
2771 struct iface *iface = port->ifaces[j];
2772 if (!strcmp(iface->name, name)) {
2780 port_update_bonding(struct port *port)
2782 if (port->n_ifaces < 2) {
2783 /* Not a bonded port. */
2784 if (port->bond_hash) {
2785 free(port->bond_hash);
2786 port->bond_hash = NULL;
2787 proc_net_compat_update_bond(port->name, NULL);
2790 if (!port->bond_hash) {
2793 port->bond_hash = xcalloc(BOND_MASK + 1, sizeof *port->bond_hash);
2794 for (i = 0; i <= BOND_MASK; i++) {
2795 struct bond_entry *e = &port->bond_hash[i];
2799 port->no_ifaces_tag = tag_create_random();
2800 bond_choose_active_iface(port);
2802 port_update_bond_compat(port);
2807 port_update_bond_compat(struct port *port)
2809 struct compat_bond bond;
2812 if (port->n_ifaces < 2) {
2817 bond.updelay = port->updelay;
2818 bond.downdelay = port->downdelay;
2819 bond.n_slaves = port->n_ifaces;
2820 bond.slaves = xmalloc(port->n_ifaces * sizeof *bond.slaves);
2821 for (i = 0; i < port->n_ifaces; i++) {
2822 struct iface *iface = port->ifaces[i];
2823 struct compat_bond_slave *slave = &bond.slaves[i];
2824 slave->name = iface->name;
2825 slave->up = ((iface->enabled && iface->delay_expires == LLONG_MAX) ||
2826 (!iface->enabled && iface->delay_expires != LLONG_MAX));
2830 memcpy(slave->mac, iface->mac, ETH_ADDR_LEN);
2832 proc_net_compat_update_bond(port->name, &bond);
2837 port_update_vlan_compat(struct port *port)
2839 struct bridge *br = port->bridge;
2840 char *vlandev_name = NULL;
2842 if (port->vlan > 0) {
2843 /* Figure out the name that the VLAN device should actually have, if it
2844 * existed. This takes some work because the VLAN device would not
2845 * have port->name in its name; rather, it would have the trunk port's
2846 * name, and 'port' would be attached to a bridge that also had the
2847 * VLAN device one of its ports. So we need to find a trunk port that
2848 * includes port->vlan.
2850 * There might be more than one candidate. This doesn't happen on
2851 * XenServer, so if it happens we just pick the first choice in
2852 * alphabetical order instead of creating multiple VLAN devices. */
2854 for (i = 0; i < br->n_ports; i++) {
2855 struct port *p = br->ports[i];
2856 if (port_trunks_vlan(p, port->vlan)
2858 && (!vlandev_name || strcmp(p->name, vlandev_name) <= 0))
2860 const uint8_t *ea = p->ifaces[0]->mac;
2861 if (!eth_addr_is_multicast(ea) &&
2862 !eth_addr_is_reserved(ea) &&
2863 !eth_addr_is_zero(ea)) {
2864 vlandev_name = p->name;
2869 proc_net_compat_update_vlan(port->name, vlandev_name, port->vlan);
2872 /* Interface functions. */
2875 iface_create(struct port *port, const char *name)
2877 struct iface *iface;
2879 iface = xcalloc(1, sizeof *iface);
2881 iface->port_ifidx = port->n_ifaces;
2882 iface->name = xstrdup(name);
2883 iface->dp_ifidx = -1;
2884 iface->tag = tag_create_random();
2885 iface->delay_expires = LLONG_MAX;
2887 netdev_nodev_get_etheraddr(name, iface->mac);
2888 netdev_nodev_get_carrier(name, &iface->enabled);
2890 if (port->n_ifaces >= port->allocated_ifaces) {
2891 port->ifaces = x2nrealloc(port->ifaces, &port->allocated_ifaces,
2892 sizeof *port->ifaces);
2894 port->ifaces[port->n_ifaces++] = iface;
2895 if (port->n_ifaces > 1) {
2896 port->bridge->has_bonded_ports = true;
2899 VLOG_DBG("attached network device %s to port %s", iface->name, port->name);
2901 port_update_bonding(port);
2902 bridge_flush(port->bridge);
2906 iface_destroy(struct iface *iface)
2909 struct port *port = iface->port;
2910 struct bridge *br = port->bridge;
2911 bool del_active = port->active_iface == iface->port_ifidx;
2914 if (iface->dp_ifidx >= 0) {
2915 port_array_set(&br->ifaces, iface->dp_ifidx, NULL);
2918 del = port->ifaces[iface->port_ifidx] = port->ifaces[--port->n_ifaces];
2919 del->port_ifidx = iface->port_ifidx;
2925 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
2926 bond_choose_active_iface(port);
2927 bond_send_learning_packets(port);
2930 port_update_bonding(port);
2931 bridge_flush(port->bridge);
2935 static struct iface *
2936 iface_lookup(const struct bridge *br, const char *name)
2940 for (i = 0; i < br->n_ports; i++) {
2941 struct port *port = br->ports[i];
2942 for (j = 0; j < port->n_ifaces; j++) {
2943 struct iface *iface = port->ifaces[j];
2944 if (!strcmp(iface->name, name)) {
2952 static struct iface *
2953 iface_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
2955 return port_array_get(&br->ifaces, dp_ifidx);
2958 /* Port mirroring. */
2961 mirror_reconfigure(struct bridge *br)
2963 struct svec old_mirrors, new_mirrors;
2966 /* Collect old and new mirrors. */
2967 svec_init(&old_mirrors);
2968 svec_init(&new_mirrors);
2969 cfg_get_subsections(&new_mirrors, "mirror.%s", br->name);
2970 for (i = 0; i < MAX_MIRRORS; i++) {
2971 if (br->mirrors[i]) {
2972 svec_add(&old_mirrors, br->mirrors[i]->name);
2976 /* Get rid of deleted mirrors and add new mirrors. */
2977 svec_sort(&old_mirrors);
2978 assert(svec_is_unique(&old_mirrors));
2979 svec_sort(&new_mirrors);
2980 assert(svec_is_unique(&new_mirrors));
2981 for (i = 0; i < MAX_MIRRORS; i++) {
2982 struct mirror *m = br->mirrors[i];
2983 if (m && !svec_contains(&new_mirrors, m->name)) {
2987 for (i = 0; i < new_mirrors.n; i++) {
2988 const char *name = new_mirrors.names[i];
2989 if (!svec_contains(&old_mirrors, name)) {
2990 mirror_create(br, name);
2993 svec_destroy(&old_mirrors);
2994 svec_destroy(&new_mirrors);
2996 /* Reconfigure all mirrors. */
2997 for (i = 0; i < MAX_MIRRORS; i++) {
2998 if (br->mirrors[i]) {
2999 mirror_reconfigure_one(br->mirrors[i]);
3003 /* Update port reserved status. */
3004 for (i = 0; i < br->n_ports; i++) {
3005 br->ports[i]->is_mirror_output_port = false;
3007 for (i = 0; i < MAX_MIRRORS; i++) {
3008 struct mirror *m = br->mirrors[i];
3009 if (m && m->out_port) {
3010 m->out_port->is_mirror_output_port = true;
3016 mirror_create(struct bridge *br, const char *name)
3021 for (i = 0; ; i++) {
3022 if (i >= MAX_MIRRORS) {
3023 VLOG_WARN("bridge %s: maximum of %d port mirrors reached, "
3024 "cannot create %s", br->name, MAX_MIRRORS, name);
3027 if (!br->mirrors[i]) {
3032 VLOG_INFO("created port mirror %s on bridge %s", name, br->name);
3035 br->mirrors[i] = m = xcalloc(1, sizeof *m);
3038 m->name = xstrdup(name);
3039 svec_init(&m->src_ports);
3040 svec_init(&m->dst_ports);
3048 mirror_destroy(struct mirror *m)
3051 struct bridge *br = m->bridge;
3054 for (i = 0; i < br->n_ports; i++) {
3055 br->ports[i]->src_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
3056 br->ports[i]->dst_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
3059 svec_destroy(&m->src_ports);
3060 svec_destroy(&m->dst_ports);
3063 m->bridge->mirrors[m->idx] = NULL;
3071 prune_ports(struct mirror *m, struct svec *ports)
3076 svec_sort_unique(ports);
3079 for (i = 0; i < ports->n; i++) {
3080 const char *name = ports->names[i];
3081 if (port_lookup(m->bridge, name)) {
3082 svec_add(&tmp, name);
3084 VLOG_WARN("mirror.%s.%s: cannot match on nonexistent port %s",
3085 m->bridge->name, m->name, name);
3088 svec_swap(ports, &tmp);
3093 prune_vlans(struct mirror *m, struct svec *vlan_strings, int **vlans)
3097 /* This isn't perfect: it won't combine "0" and "00", and the textual sort
3098 * order won't give us numeric sort order. But that's good enough for what
3099 * we need right now. */
3100 svec_sort_unique(vlan_strings);
3102 *vlans = xmalloc(sizeof *vlans * vlan_strings->n);
3104 for (i = 0; i < vlan_strings->n; i++) {
3105 const char *name = vlan_strings->names[i];
3107 if (!str_to_int(name, 10, &vlan) || vlan < 0 || vlan > 4095) {
3108 VLOG_WARN("mirror.%s.%s.select.vlan: ignoring invalid VLAN %s",
3109 m->bridge->name, m->name, name);
3111 (*vlans)[n_vlans++] = vlan;
3118 vlan_is_mirrored(const struct mirror *m, int vlan)
3122 for (i = 0; i < m->n_vlans; i++) {
3123 if (m->vlans[i] == vlan) {
3131 port_trunks_any_mirrored_vlan(const struct mirror *m, const struct port *p)
3135 for (i = 0; i < m->n_vlans; i++) {
3136 if (port_trunks_vlan(p, m->vlans[i])) {
3144 mirror_reconfigure_one(struct mirror *m)
3146 char *pfx = xasprintf("mirror.%s.%s", m->bridge->name, m->name);
3147 struct svec src_ports, dst_ports, ports;
3148 struct svec vlan_strings;
3149 mirror_mask_t mirror_bit;
3150 const char *out_port_name;
3151 struct port *out_port;
3156 bool mirror_all_ports;
3158 /* Get output port. */
3159 out_port_name = cfg_get_key(0, "mirror.%s.%s.output.port",
3160 m->bridge->name, m->name);
3161 if (out_port_name) {
3162 out_port = port_lookup(m->bridge, out_port_name);
3164 VLOG_ERR("%s.output.port: bridge %s does not have a port "
3165 "named %s", pfx, m->bridge->name, out_port_name);
3172 if (cfg_has("%s.output.vlan", pfx)) {
3173 VLOG_ERR("%s.output.port and %s.output.vlan both specified; "
3174 "ignoring %s.output.vlan", pfx, pfx, pfx);
3176 } else if (cfg_has("%s.output.vlan", pfx)) {
3178 out_vlan = cfg_get_vlan(0, "%s.output.vlan", pfx);
3180 VLOG_ERR("%s: neither %s.output.port nor %s.output.vlan specified, "
3181 "but exactly one is required; disabling port mirror %s",
3182 pfx, pfx, pfx, pfx);
3188 /* Get all the ports, and drop duplicates and ports that don't exist. */
3189 svec_init(&src_ports);
3190 svec_init(&dst_ports);
3192 cfg_get_all_keys(&src_ports, "%s.select.src-port", pfx);
3193 cfg_get_all_keys(&dst_ports, "%s.select.dst-port", pfx);
3194 cfg_get_all_keys(&ports, "%s.select.port", pfx);
3195 svec_append(&src_ports, &ports);
3196 svec_append(&dst_ports, &ports);
3197 svec_destroy(&ports);
3198 prune_ports(m, &src_ports);
3199 prune_ports(m, &dst_ports);
3201 /* Get all the vlans, and drop duplicate and invalid vlans. */
3202 svec_init(&vlan_strings);
3203 cfg_get_all_keys(&vlan_strings, "%s.select.vlan", pfx);
3204 n_vlans = prune_vlans(m, &vlan_strings, &vlans);
3205 svec_destroy(&vlan_strings);
3207 /* Update mirror data. */
3208 if (!svec_equal(&m->src_ports, &src_ports)
3209 || !svec_equal(&m->dst_ports, &dst_ports)
3210 || m->n_vlans != n_vlans
3211 || memcmp(m->vlans, vlans, sizeof *vlans * n_vlans)
3212 || m->out_port != out_port
3213 || m->out_vlan != out_vlan) {
3214 bridge_flush(m->bridge);
3216 svec_swap(&m->src_ports, &src_ports);
3217 svec_swap(&m->dst_ports, &dst_ports);
3220 m->n_vlans = n_vlans;
3221 m->out_port = out_port;
3222 m->out_vlan = out_vlan;
3224 /* If no selection criteria have been given, mirror for all ports. */
3225 mirror_all_ports = (!m->src_ports.n) && (!m->dst_ports.n) && (!m->n_vlans);
3228 mirror_bit = MIRROR_MASK_C(1) << m->idx;
3229 for (i = 0; i < m->bridge->n_ports; i++) {
3230 struct port *port = m->bridge->ports[i];
3232 if (mirror_all_ports
3233 || svec_contains(&m->src_ports, port->name)
3236 ? port_trunks_any_mirrored_vlan(m, port)
3237 : vlan_is_mirrored(m, port->vlan)))) {
3238 port->src_mirrors |= mirror_bit;
3240 port->src_mirrors &= ~mirror_bit;
3243 if (mirror_all_ports || svec_contains(&m->dst_ports, port->name)) {
3244 port->dst_mirrors |= mirror_bit;
3246 port->dst_mirrors &= ~mirror_bit;
3251 svec_destroy(&src_ports);
3252 svec_destroy(&dst_ports);
3256 /* Spanning tree protocol. */
3258 static void brstp_update_port_state(struct port *);
3261 brstp_send_bpdu(struct ofpbuf *pkt, int port_no, void *br_)
3263 struct bridge *br = br_;
3264 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
3265 struct iface *iface = iface_from_dp_ifidx(br, port_no);
3267 VLOG_WARN_RL(&rl, "%s: cannot send BPDU on unknown port %d",
3269 } else if (eth_addr_is_zero(iface->mac)) {
3270 VLOG_WARN_RL(&rl, "%s: cannot send BPDU on port %d with unknown MAC",
3273 union ofp_action action;
3274 struct eth_header *eth = pkt->l2;
3277 memcpy(eth->eth_src, iface->mac, ETH_ADDR_LEN);
3279 memset(&action, 0, sizeof action);
3280 action.type = htons(OFPAT_OUTPUT);
3281 action.output.len = htons(sizeof action);
3282 action.output.port = htons(port_no);
3284 flow_extract(pkt, ODPP_NONE, &flow);
3285 ofproto_send_packet(br->ofproto, &flow, &action, 1, pkt);
3291 brstp_reconfigure(struct bridge *br)
3295 if (!cfg_get_bool(0, "stp.%s.enabled", br->name)) {
3297 stp_destroy(br->stp);
3303 uint64_t bridge_address, bridge_id;
3304 int bridge_priority;
3306 bridge_address = cfg_get_mac(0, "stp.%s.address", br->name);
3307 if (!bridge_address) {
3309 bridge_address = (stp_get_bridge_id(br->stp)
3310 & ((UINT64_C(1) << 48) - 1));
3312 uint8_t mac[ETH_ADDR_LEN];
3313 eth_addr_random(mac);
3314 bridge_address = eth_addr_to_uint64(mac);
3318 if (cfg_is_valid(CFG_INT | CFG_REQUIRED, "stp.%s.priority",
3320 bridge_priority = cfg_get_int(0, "stp.%s.priority", br->name);
3322 bridge_priority = STP_DEFAULT_BRIDGE_PRIORITY;
3325 bridge_id = bridge_address | ((uint64_t) bridge_priority << 48);
3327 br->stp = stp_create(br->name, bridge_id, brstp_send_bpdu, br);
3328 br->stp_last_tick = time_msec();
3331 if (bridge_id != stp_get_bridge_id(br->stp)) {
3332 stp_set_bridge_id(br->stp, bridge_id);
3337 for (i = 0; i < br->n_ports; i++) {
3338 struct port *p = br->ports[i];
3340 struct stp_port *sp;
3341 int path_cost, priority;
3347 dp_ifidx = p->ifaces[0]->dp_ifidx;
3348 if (dp_ifidx < 0 || dp_ifidx >= STP_MAX_PORTS) {
3352 sp = stp_get_port(br->stp, dp_ifidx);
3353 enable = (!cfg_is_valid(CFG_BOOL | CFG_REQUIRED,
3354 "stp.%s.port.%s.enabled",
3356 || cfg_get_bool(0, "stp.%s.port.%s.enabled",
3357 br->name, p->name));
3358 if (p->is_mirror_output_port) {
3361 if (enable != (stp_port_get_state(sp) != STP_DISABLED)) {
3362 bridge_flush(br); /* Might not be necessary. */
3364 stp_port_enable(sp);
3366 stp_port_disable(sp);
3370 path_cost = cfg_get_int(0, "stp.%s.port.%s.path-cost",
3372 stp_port_set_path_cost(sp, path_cost ? path_cost : 19 /* XXX */);
3374 priority = (cfg_is_valid(CFG_INT | CFG_REQUIRED,
3375 "stp.%s.port.%s.priority",
3377 ? cfg_get_int(0, "stp.%s.port.%s.priority",
3379 : STP_DEFAULT_PORT_PRIORITY);
3380 stp_port_set_priority(sp, priority);
3383 brstp_adjust_timers(br);
3385 for (i = 0; i < br->n_ports; i++) {
3386 brstp_update_port_state(br->ports[i]);
3391 brstp_update_port_state(struct port *p)
3393 struct bridge *br = p->bridge;
3394 enum stp_state state;
3396 /* Figure out new state. */
3397 state = STP_DISABLED;
3398 if (br->stp && p->n_ifaces > 0) {
3399 int dp_ifidx = p->ifaces[0]->dp_ifidx;
3400 if (dp_ifidx >= 0 && dp_ifidx < STP_MAX_PORTS) {
3401 state = stp_port_get_state(stp_get_port(br->stp, dp_ifidx));
3406 if (p->stp_state != state) {
3407 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
3408 VLOG_INFO_RL(&rl, "port %s: STP state changed from %s to %s",
3409 p->name, stp_state_name(p->stp_state),
3410 stp_state_name(state));
3411 if (p->stp_state == STP_DISABLED) {
3414 ofproto_revalidate(p->bridge->ofproto, p->stp_state_tag);
3416 p->stp_state = state;
3417 p->stp_state_tag = (p->stp_state == STP_DISABLED ? 0
3418 : tag_create_random());
3423 brstp_adjust_timers(struct bridge *br)
3425 int hello_time = cfg_get_int(0, "stp.%s.hello-time", br->name);
3426 int max_age = cfg_get_int(0, "stp.%s.max-age", br->name);
3427 int forward_delay = cfg_get_int(0, "stp.%s.forward-delay", br->name);
3429 stp_set_hello_time(br->stp, hello_time ? hello_time : 2000);
3430 stp_set_max_age(br->stp, max_age ? max_age : 20000);
3431 stp_set_forward_delay(br->stp, forward_delay ? forward_delay : 15000);
3435 brstp_run(struct bridge *br)
3438 long long int now = time_msec();
3439 long long int elapsed = now - br->stp_last_tick;
3440 struct stp_port *sp;
3443 stp_tick(br->stp, MIN(INT_MAX, elapsed));
3444 br->stp_last_tick = now;
3446 while (stp_get_changed_port(br->stp, &sp)) {
3447 struct port *p = port_from_dp_ifidx(br, stp_port_no(sp));
3449 brstp_update_port_state(p);
3456 brstp_wait(struct bridge *br)
3459 poll_timer_wait(1000);