1 /* Copyright (c) 2008, 2009, 2010 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>
23 #include <sys/socket.h>
25 #include <openflow/openflow.h>
30 #include <sys/socket.h>
31 #include <sys/types.h>
37 #include "dynamic-string.h"
42 #include "mac-learning.h"
45 #include "ofp-print.h"
47 #include "ofproto/netflow.h"
48 #include "ofproto/ofproto.h"
50 #include "poll-loop.h"
51 #include "port-array.h"
52 #include "proc-net-compat.h"
56 #include "socket-util.h"
57 #include "stream-ssl.h"
63 #include "vswitchd/vswitch-idl.h"
64 #include "xenserver.h"
66 #include "sflow_api.h"
68 #define THIS_MODULE VLM_bridge
77 /* These members are always valid. */
78 struct port *port; /* Containing port. */
79 size_t port_ifidx; /* Index within containing port. */
80 char *name; /* Host network device name. */
81 tag_type tag; /* Tag associated with this interface. */
82 long long delay_expires; /* Time after which 'enabled' may change. */
84 /* These members are valid only after bridge_reconfigure() causes them to
86 int dp_ifidx; /* Index within kernel datapath. */
87 struct netdev *netdev; /* Network device. */
88 bool enabled; /* May be chosen for flows? */
90 /* This member is only valid *during* bridge_reconfigure(). */
91 const struct ovsrec_interface *cfg;
94 #define BOND_MASK 0xff
96 int iface_idx; /* Index of assigned iface, or -1 if none. */
97 uint64_t tx_bytes; /* Count of bytes recently transmitted. */
98 tag_type iface_tag; /* Tag associated with iface_idx. */
101 #define MAX_MIRRORS 32
102 typedef uint32_t mirror_mask_t;
103 #define MIRROR_MASK_C(X) UINT32_C(X)
104 BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
106 struct bridge *bridge;
110 /* Selection criteria. */
111 struct shash src_ports; /* Name is port name; data is always NULL. */
112 struct shash dst_ports; /* Name is port name; data is always NULL. */
117 struct port *out_port;
121 #define FLOOD_PORT ((struct port *) 1) /* The 'flood' output port. */
123 struct bridge *bridge;
125 int vlan; /* -1=trunk port, else a 12-bit VLAN ID. */
126 unsigned long *trunks; /* Bitmap of trunked VLANs, if 'vlan' == -1.
127 * NULL if all VLANs are trunked. */
130 /* An ordinary bridge port has 1 interface.
131 * A bridge port for bonding has at least 2 interfaces. */
132 struct iface **ifaces;
133 size_t n_ifaces, allocated_ifaces;
136 struct bond_entry *bond_hash; /* An array of (BOND_MASK + 1) elements. */
137 int active_iface; /* Ifidx on which bcasts accepted, or -1. */
138 tag_type active_iface_tag; /* Tag for bcast flows. */
139 tag_type no_ifaces_tag; /* Tag for flows when all ifaces disabled. */
140 int updelay, downdelay; /* Delay before iface goes up/down, in ms. */
141 bool bond_compat_is_stale; /* Need to call port_update_bond_compat()? */
142 bool bond_fake_iface; /* Fake a bond interface for legacy compat? */
143 long bond_next_fake_iface_update; /* Next update to fake bond stats. */
144 int bond_rebalance_interval; /* Interval between rebalances, in ms. */
145 long long int bond_next_rebalance; /* Next rebalancing time. */
147 /* Port mirroring info. */
148 mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
149 mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
150 bool is_mirror_output_port; /* Does port mirroring send frames here? */
152 /* This member is only valid *during* bridge_reconfigure(). */
153 const struct ovsrec_port *cfg;
156 #define DP_MAX_PORTS 255
158 struct list node; /* Node in global list of bridges. */
159 char *name; /* User-specified arbitrary name. */
160 struct mac_learning *ml; /* MAC learning table. */
161 bool sent_config_request; /* Successfully sent config request? */
162 uint8_t default_ea[ETH_ADDR_LEN]; /* Default MAC. */
164 /* OpenFlow switch processing. */
165 struct ofproto *ofproto; /* OpenFlow switch. */
167 /* Description strings. */
168 char *mfr_desc; /* Manufacturer. */
169 char *hw_desc; /* Hardware. */
170 char *sw_desc; /* Software version. */
171 char *serial_desc; /* Serial number. */
172 char *dp_desc; /* Datapath description. */
174 /* Kernel datapath information. */
175 struct dpif *dpif; /* Datapath. */
176 struct port_array ifaces; /* Indexed by kernel datapath port number. */
180 size_t n_ports, allocated_ports;
181 struct shash iface_by_name; /* "struct iface"s indexed by name. */
182 struct shash port_by_name; /* "struct port"s indexed by name. */
185 bool has_bonded_ports;
190 /* Flow statistics gathering. */
191 time_t next_stats_request;
193 /* Port mirroring. */
194 struct mirror *mirrors[MAX_MIRRORS];
196 /* This member is only valid *during* bridge_reconfigure(). */
197 const struct ovsrec_bridge *cfg;
200 /* List of all bridges. */
201 static struct list all_bridges = LIST_INITIALIZER(&all_bridges);
203 /* Maximum number of datapaths. */
204 enum { DP_MAX = 256 };
206 static struct bridge *bridge_create(const struct ovsrec_bridge *br_cfg);
207 static void bridge_destroy(struct bridge *);
208 static struct bridge *bridge_lookup(const char *name);
209 static unixctl_cb_func bridge_unixctl_dump_flows;
210 static int bridge_run_one(struct bridge *);
211 static size_t bridge_get_controllers(const struct ovsrec_open_vswitch *ovs_cfg,
212 const struct bridge *br,
213 struct ovsrec_controller ***controllersp);
214 static void bridge_reconfigure_one(const struct ovsrec_open_vswitch *,
216 static void bridge_reconfigure_remotes(const struct ovsrec_open_vswitch *,
218 const struct sockaddr_in *managers,
220 static void bridge_get_all_ifaces(const struct bridge *, struct shash *ifaces);
221 static void bridge_fetch_dp_ifaces(struct bridge *);
222 static void bridge_flush(struct bridge *);
223 static void bridge_pick_local_hw_addr(struct bridge *,
224 uint8_t ea[ETH_ADDR_LEN],
225 struct iface **hw_addr_iface);
226 static uint64_t bridge_pick_datapath_id(struct bridge *,
227 const uint8_t bridge_ea[ETH_ADDR_LEN],
228 struct iface *hw_addr_iface);
229 static struct iface *bridge_get_local_iface(struct bridge *);
230 static uint64_t dpid_from_hash(const void *, size_t nbytes);
232 static unixctl_cb_func bridge_unixctl_fdb_show;
234 static void bond_init(void);
235 static void bond_run(struct bridge *);
236 static void bond_wait(struct bridge *);
237 static void bond_rebalance_port(struct port *);
238 static void bond_send_learning_packets(struct port *);
239 static void bond_enable_slave(struct iface *iface, bool enable);
241 static struct port *port_create(struct bridge *, const char *name);
242 static void port_reconfigure(struct port *, const struct ovsrec_port *);
243 static void port_del_ifaces(struct port *, const struct ovsrec_port *);
244 static void port_destroy(struct port *);
245 static struct port *port_lookup(const struct bridge *, const char *name);
246 static struct iface *port_lookup_iface(const struct port *, const char *name);
247 static struct port *port_from_dp_ifidx(const struct bridge *,
249 static void port_update_bond_compat(struct port *);
250 static void port_update_vlan_compat(struct port *);
251 static void port_update_bonding(struct port *);
253 static struct mirror *mirror_create(struct bridge *, const char *name);
254 static void mirror_destroy(struct mirror *);
255 static void mirror_reconfigure(struct bridge *);
256 static void mirror_reconfigure_one(struct mirror *, struct ovsrec_mirror *);
257 static bool vlan_is_mirrored(const struct mirror *, int vlan);
259 static struct iface *iface_create(struct port *port,
260 const struct ovsrec_interface *if_cfg);
261 static void iface_destroy(struct iface *);
262 static struct iface *iface_lookup(const struct bridge *, const char *name);
263 static struct iface *iface_from_dp_ifidx(const struct bridge *,
265 static bool iface_is_internal(const struct bridge *, const char *name);
266 static void iface_set_mac(struct iface *);
268 /* Hooks into ofproto processing. */
269 static struct ofhooks bridge_ofhooks;
271 /* Public functions. */
273 /* Adds the name of each interface used by a bridge, including local and
274 * internal ports, to 'svec'. */
276 bridge_get_ifaces(struct svec *svec)
278 struct bridge *br, *next;
281 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
282 for (i = 0; i < br->n_ports; i++) {
283 struct port *port = br->ports[i];
285 for (j = 0; j < port->n_ifaces; j++) {
286 struct iface *iface = port->ifaces[j];
287 if (iface->dp_ifidx < 0) {
288 VLOG_ERR("%s interface not in datapath %s, ignoring",
289 iface->name, dpif_name(br->dpif));
291 if (iface->dp_ifidx != ODPP_LOCAL) {
292 svec_add(svec, iface->name);
301 bridge_init(const struct ovsrec_open_vswitch *cfg)
303 struct svec bridge_names;
304 struct svec dpif_names, dpif_types;
307 unixctl_command_register("fdb/show", bridge_unixctl_fdb_show, NULL);
309 svec_init(&bridge_names);
310 for (i = 0; i < cfg->n_bridges; i++) {
311 svec_add(&bridge_names, cfg->bridges[i]->name);
313 svec_sort(&bridge_names);
315 svec_init(&dpif_names);
316 svec_init(&dpif_types);
317 dp_enumerate_types(&dpif_types);
318 for (i = 0; i < dpif_types.n; i++) {
323 dp_enumerate_names(dpif_types.names[i], &dpif_names);
325 for (j = 0; j < dpif_names.n; j++) {
326 retval = dpif_open(dpif_names.names[j], dpif_types.names[i], &dpif);
328 struct svec all_names;
331 svec_init(&all_names);
332 dpif_get_all_names(dpif, &all_names);
333 for (k = 0; k < all_names.n; k++) {
334 if (svec_contains(&bridge_names, all_names.names[k])) {
340 svec_destroy(&all_names);
345 svec_destroy(&bridge_names);
346 svec_destroy(&dpif_names);
347 svec_destroy(&dpif_types);
349 unixctl_command_register("bridge/dump-flows", bridge_unixctl_dump_flows,
353 bridge_reconfigure(cfg);
358 bridge_configure_ssl(const struct ovsrec_ssl *ssl)
360 /* XXX SSL should be configurable on a per-bridge basis. */
362 stream_ssl_set_private_key_file(ssl->private_key);
363 stream_ssl_set_certificate_file(ssl->certificate);
364 stream_ssl_set_ca_cert_file(ssl->ca_cert, ssl->bootstrap_ca_cert);
369 /* Attempt to create the network device 'iface_name' through the netdev
372 set_up_iface(const struct ovsrec_interface *iface_cfg, struct iface *iface,
375 struct shash_node *node;
376 struct shash options;
380 shash_init(&options);
381 for (i = 0; i < iface_cfg->n_options; i++) {
382 shash_add(&options, iface_cfg->key_options[i],
383 xstrdup(iface_cfg->value_options[i]));
387 struct netdev_options netdev_options;
389 memset(&netdev_options, 0, sizeof netdev_options);
390 netdev_options.name = iface_cfg->name;
391 if (!strcmp(iface_cfg->type, "internal")) {
392 /* An "internal" config type maps to a netdev "system" type. */
393 netdev_options.type = "system";
395 netdev_options.type = iface_cfg->type;
397 netdev_options.args = &options;
398 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
399 netdev_options.may_create = true;
400 if (iface_is_internal(iface->port->bridge, iface_cfg->name)) {
401 netdev_options.may_open = true;
404 error = netdev_open(&netdev_options, &iface->netdev);
407 netdev_get_carrier(iface->netdev, &iface->enabled);
409 } else if (iface->netdev) {
410 const char *netdev_type = netdev_get_type(iface->netdev);
411 const char *iface_type = iface_cfg->type && strlen(iface_cfg->type)
412 ? iface_cfg->type : NULL;
414 /* An "internal" config type maps to a netdev "system" type. */
415 if (iface_type && !strcmp(iface_type, "internal")) {
416 iface_type = "system";
419 if (!iface_type || !strcmp(netdev_type, iface_type)) {
420 error = netdev_reconfigure(iface->netdev, &options);
422 VLOG_WARN("%s: attempting change device type from %s to %s",
423 iface_cfg->name, netdev_type, iface_type);
428 SHASH_FOR_EACH (node, &options) {
431 shash_destroy(&options);
437 reconfigure_iface(const struct ovsrec_interface *iface_cfg, struct iface *iface)
439 return set_up_iface(iface_cfg, iface, false);
443 check_iface_netdev(struct bridge *br OVS_UNUSED, struct iface *iface,
444 void *aux OVS_UNUSED)
446 if (!iface->netdev) {
447 int error = set_up_iface(iface->cfg, iface, true);
449 VLOG_WARN("could not open netdev on %s, dropping: %s", iface->name,
459 check_iface_dp_ifidx(struct bridge *br, struct iface *iface,
460 void *aux OVS_UNUSED)
462 if (iface->dp_ifidx >= 0) {
463 VLOG_DBG("%s has interface %s on port %d",
465 iface->name, iface->dp_ifidx);
468 VLOG_ERR("%s interface not in %s, dropping",
469 iface->name, dpif_name(br->dpif));
475 set_iface_properties(struct bridge *br OVS_UNUSED, struct iface *iface,
476 void *aux OVS_UNUSED)
478 /* Set policing attributes. */
479 netdev_set_policing(iface->netdev,
480 iface->cfg->ingress_policing_rate,
481 iface->cfg->ingress_policing_burst);
483 /* Set MAC address of internal interfaces other than the local
485 if (iface->dp_ifidx != ODPP_LOCAL
486 && iface_is_internal(br, iface->name)) {
487 iface_set_mac(iface);
493 /* Calls 'cb' for each interfaces in 'br', passing along the 'aux' argument.
494 * Deletes from 'br' all the interfaces for which 'cb' returns false, and then
495 * deletes from 'br' any ports that no longer have any interfaces. */
497 iterate_and_prune_ifaces(struct bridge *br,
498 bool (*cb)(struct bridge *, struct iface *,
504 for (i = 0; i < br->n_ports; ) {
505 struct port *port = br->ports[i];
506 for (j = 0; j < port->n_ifaces; ) {
507 struct iface *iface = port->ifaces[j];
508 if (cb(br, iface, aux)) {
511 iface_destroy(iface);
515 if (port->n_ifaces) {
518 VLOG_ERR("%s port has no interfaces, dropping", port->name);
524 /* Looks at the list of managers in 'ovs_cfg' and extracts their remote IP
525 * addresses and ports into '*managersp' and '*n_managersp'. The caller is
526 * responsible for freeing '*managersp' (with free()).
528 * You may be asking yourself "why does ovs-vswitchd care?", because
529 * ovsdb-server is responsible for connecting to the managers, and ovs-vswitchd
530 * should not be and in fact is not directly involved in that. But
531 * ovs-vswitchd needs to make sure that ovsdb-server can reach the managers, so
532 * it has to tell in-band control where the managers are to enable that.
535 collect_managers(const struct ovsrec_open_vswitch *ovs_cfg,
536 struct sockaddr_in **managersp, size_t *n_managersp)
538 struct sockaddr_in *managers = NULL;
539 size_t n_managers = 0;
541 if (ovs_cfg->n_managers > 0) {
544 managers = xmalloc(ovs_cfg->n_managers * sizeof *managers);
545 for (i = 0; i < ovs_cfg->n_managers; i++) {
546 const char *name = ovs_cfg->managers[i];
547 struct sockaddr_in *sin = &managers[i];
549 if ((!strncmp(name, "tcp:", 4)
550 && inet_parse_active(name + 4, JSONRPC_TCP_PORT, sin)) ||
551 (!strncmp(name, "ssl:", 4)
552 && inet_parse_active(name + 4, JSONRPC_SSL_PORT, sin))) {
558 *managersp = managers;
559 *n_managersp = n_managers;
563 bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg)
565 struct ovsdb_idl_txn *txn;
566 struct shash old_br, new_br;
567 struct shash_node *node;
568 struct bridge *br, *next;
569 struct sockaddr_in *managers;
572 int sflow_bridge_number;
574 COVERAGE_INC(bridge_reconfigure);
576 txn = ovsdb_idl_txn_create(ovs_cfg->header_.table->idl);
578 collect_managers(ovs_cfg, &managers, &n_managers);
580 /* Collect old and new bridges. */
583 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
584 shash_add(&old_br, br->name, br);
586 for (i = 0; i < ovs_cfg->n_bridges; i++) {
587 const struct ovsrec_bridge *br_cfg = ovs_cfg->bridges[i];
588 if (!shash_add_once(&new_br, br_cfg->name, br_cfg)) {
589 VLOG_WARN("more than one bridge named %s", br_cfg->name);
593 /* Get rid of deleted bridges and add new bridges. */
594 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
595 struct ovsrec_bridge *br_cfg = shash_find_data(&new_br, br->name);
602 SHASH_FOR_EACH (node, &new_br) {
603 const char *br_name = node->name;
604 const struct ovsrec_bridge *br_cfg = node->data;
605 br = shash_find_data(&old_br, br_name);
607 /* If the bridge datapath type has changed, we need to tear it
608 * down and recreate. */
609 if (strcmp(br->cfg->datapath_type, br_cfg->datapath_type)) {
611 bridge_create(br_cfg);
614 bridge_create(br_cfg);
617 shash_destroy(&old_br);
618 shash_destroy(&new_br);
622 bridge_configure_ssl(ovs_cfg->ssl);
625 /* Reconfigure all bridges. */
626 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
627 bridge_reconfigure_one(ovs_cfg, br);
630 /* Add and delete ports on all datapaths.
632 * The kernel will reject any attempt to add a given port to a datapath if
633 * that port already belongs to a different datapath, so we must do all
634 * port deletions before any port additions. */
635 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
636 struct odp_port *dpif_ports;
638 struct shash want_ifaces;
640 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
641 bridge_get_all_ifaces(br, &want_ifaces);
642 for (i = 0; i < n_dpif_ports; i++) {
643 const struct odp_port *p = &dpif_ports[i];
644 if (!shash_find(&want_ifaces, p->devname)
645 && strcmp(p->devname, br->name)) {
646 int retval = dpif_port_del(br->dpif, p->port);
648 VLOG_ERR("failed to remove %s interface from %s: %s",
649 p->devname, dpif_name(br->dpif),
654 shash_destroy(&want_ifaces);
657 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
658 struct odp_port *dpif_ports;
660 struct shash cur_ifaces, want_ifaces;
661 struct shash_node *node;
663 /* Get the set of interfaces currently in this datapath. */
664 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
665 shash_init(&cur_ifaces);
666 for (i = 0; i < n_dpif_ports; i++) {
667 const char *name = dpif_ports[i].devname;
668 if (!shash_find(&cur_ifaces, name)) {
669 shash_add(&cur_ifaces, name, NULL);
674 /* Get the set of interfaces we want on this datapath. */
675 bridge_get_all_ifaces(br, &want_ifaces);
677 SHASH_FOR_EACH (node, &want_ifaces) {
678 const char *if_name = node->name;
679 struct iface *iface = node->data;
681 if (shash_find(&cur_ifaces, if_name)) {
682 /* Already exists, just reconfigure it. */
684 reconfigure_iface(iface->cfg, iface);
687 /* Need to add to datapath. */
691 /* Add to datapath. */
692 internal = iface_is_internal(br, if_name);
693 error = dpif_port_add(br->dpif, if_name,
694 internal ? ODP_PORT_INTERNAL : 0, NULL);
695 if (error == EFBIG) {
696 VLOG_ERR("ran out of valid port numbers on %s",
697 dpif_name(br->dpif));
700 VLOG_ERR("failed to add %s interface to %s: %s",
701 if_name, dpif_name(br->dpif), strerror(error));
705 shash_destroy(&cur_ifaces);
706 shash_destroy(&want_ifaces);
708 sflow_bridge_number = 0;
709 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
712 struct iface *local_iface;
713 struct iface *hw_addr_iface;
716 bridge_fetch_dp_ifaces(br);
718 iterate_and_prune_ifaces(br, check_iface_netdev, NULL);
719 iterate_and_prune_ifaces(br, check_iface_dp_ifidx, NULL);
721 /* Pick local port hardware address, datapath ID. */
722 bridge_pick_local_hw_addr(br, ea, &hw_addr_iface);
723 local_iface = bridge_get_local_iface(br);
725 int error = netdev_set_etheraddr(local_iface->netdev, ea);
727 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
728 VLOG_ERR_RL(&rl, "bridge %s: failed to set bridge "
729 "Ethernet address: %s",
730 br->name, strerror(error));
734 dpid = bridge_pick_datapath_id(br, ea, hw_addr_iface);
735 ofproto_set_datapath_id(br->ofproto, dpid);
737 dpid_string = xasprintf("%012"PRIx64, dpid);
738 ovsrec_bridge_set_datapath_id(br->cfg, dpid_string);
741 /* Set NetFlow configuration on this bridge. */
742 if (br->cfg->netflow) {
743 struct ovsrec_netflow *nf_cfg = br->cfg->netflow;
744 struct netflow_options opts;
746 memset(&opts, 0, sizeof opts);
748 dpif_get_netflow_ids(br->dpif, &opts.engine_type, &opts.engine_id);
749 if (nf_cfg->engine_type) {
750 opts.engine_type = *nf_cfg->engine_type;
752 if (nf_cfg->engine_id) {
753 opts.engine_id = *nf_cfg->engine_id;
756 opts.active_timeout = nf_cfg->active_timeout;
757 if (!opts.active_timeout) {
758 opts.active_timeout = -1;
759 } else if (opts.active_timeout < 0) {
760 VLOG_WARN("bridge %s: active timeout interval set to negative "
761 "value, using default instead (%d seconds)", br->name,
762 NF_ACTIVE_TIMEOUT_DEFAULT);
763 opts.active_timeout = -1;
766 opts.add_id_to_iface = nf_cfg->add_id_to_interface;
767 if (opts.add_id_to_iface) {
768 if (opts.engine_id > 0x7f) {
769 VLOG_WARN("bridge %s: netflow port mangling may conflict "
770 "with another vswitch, choose an engine id less "
771 "than 128", br->name);
773 if (br->n_ports > 508) {
774 VLOG_WARN("bridge %s: netflow port mangling will conflict "
775 "with another port when more than 508 ports are "
780 opts.collectors.n = nf_cfg->n_targets;
781 opts.collectors.names = nf_cfg->targets;
782 if (ofproto_set_netflow(br->ofproto, &opts)) {
783 VLOG_ERR("bridge %s: problem setting netflow collectors",
787 ofproto_set_netflow(br->ofproto, NULL);
790 /* Set sFlow configuration on this bridge. */
791 if (br->cfg->sflow) {
792 const struct ovsrec_sflow *sflow_cfg = br->cfg->sflow;
793 struct ovsrec_controller **controllers;
794 struct ofproto_sflow_options oso;
795 size_t n_controllers;
798 memset(&oso, 0, sizeof oso);
800 oso.targets.n = sflow_cfg->n_targets;
801 oso.targets.names = sflow_cfg->targets;
803 oso.sampling_rate = SFL_DEFAULT_SAMPLING_RATE;
804 if (sflow_cfg->sampling) {
805 oso.sampling_rate = *sflow_cfg->sampling;
808 oso.polling_interval = SFL_DEFAULT_POLLING_INTERVAL;
809 if (sflow_cfg->polling) {
810 oso.polling_interval = *sflow_cfg->polling;
813 oso.header_len = SFL_DEFAULT_HEADER_SIZE;
814 if (sflow_cfg->header) {
815 oso.header_len = *sflow_cfg->header;
818 oso.sub_id = sflow_bridge_number++;
819 oso.agent_device = sflow_cfg->agent;
821 oso.control_ip = NULL;
822 n_controllers = bridge_get_controllers(ovs_cfg, br, &controllers);
823 for (i = 0; i < n_controllers; i++) {
824 if (controllers[i]->local_ip) {
825 oso.control_ip = controllers[i]->local_ip;
829 ofproto_set_sflow(br->ofproto, &oso);
831 /* Do not destroy oso.targets because it is owned by sflow_cfg. */
833 ofproto_set_sflow(br->ofproto, NULL);
836 /* Update the controller and related settings. It would be more
837 * straightforward to call this from bridge_reconfigure_one(), but we
838 * can't do it there for two reasons. First, and most importantly, at
839 * that point we don't know the dp_ifidx of any interfaces that have
840 * been added to the bridge (because we haven't actually added them to
841 * the datapath). Second, at that point we haven't set the datapath ID
842 * yet; when a controller is configured, resetting the datapath ID will
843 * immediately disconnect from the controller, so it's better to set
844 * the datapath ID before the controller. */
845 bridge_reconfigure_remotes(ovs_cfg, br, managers, n_managers);
847 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
848 for (i = 0; i < br->n_ports; i++) {
849 struct port *port = br->ports[i];
851 port_update_vlan_compat(port);
852 port_update_bonding(port);
855 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
856 iterate_and_prune_ifaces(br, set_iface_properties, NULL);
859 ovsrec_open_vswitch_set_cur_cfg(ovs_cfg, ovs_cfg->next_cfg);
861 ovsdb_idl_txn_commit(txn);
862 ovsdb_idl_txn_destroy(txn); /* XXX */
868 get_ovsrec_key_value(const char *key, char **keys, char **values, size_t n)
872 for (i = 0; i < n; i++) {
873 if (!strcmp(keys[i], key)) {
881 bridge_get_other_config(const struct ovsrec_bridge *br_cfg, const char *key)
883 return get_ovsrec_key_value(key,
884 br_cfg->key_other_config,
885 br_cfg->value_other_config,
886 br_cfg->n_other_config);
890 bridge_pick_local_hw_addr(struct bridge *br, uint8_t ea[ETH_ADDR_LEN],
891 struct iface **hw_addr_iface)
897 *hw_addr_iface = NULL;
899 /* Did the user request a particular MAC? */
900 hwaddr = bridge_get_other_config(br->cfg, "hwaddr");
901 if (hwaddr && eth_addr_from_string(hwaddr, ea)) {
902 if (eth_addr_is_multicast(ea)) {
903 VLOG_ERR("bridge %s: cannot set MAC address to multicast "
904 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
905 } else if (eth_addr_is_zero(ea)) {
906 VLOG_ERR("bridge %s: cannot set MAC address to zero", br->name);
912 /* Otherwise choose the minimum non-local MAC address among all of the
914 memset(ea, 0xff, sizeof ea);
915 for (i = 0; i < br->n_ports; i++) {
916 struct port *port = br->ports[i];
917 uint8_t iface_ea[ETH_ADDR_LEN];
920 /* Mirror output ports don't participate. */
921 if (port->is_mirror_output_port) {
925 /* Choose the MAC address to represent the port. */
926 if (port->cfg->mac && eth_addr_from_string(port->cfg->mac, iface_ea)) {
927 /* Find the interface with this Ethernet address (if any) so that
928 * we can provide the correct devname to the caller. */
930 for (j = 0; j < port->n_ifaces; j++) {
931 struct iface *candidate = port->ifaces[j];
932 uint8_t candidate_ea[ETH_ADDR_LEN];
933 if (!netdev_get_etheraddr(candidate->netdev, candidate_ea)
934 && eth_addr_equals(iface_ea, candidate_ea)) {
939 /* Choose the interface whose MAC address will represent the port.
940 * The Linux kernel bonding code always chooses the MAC address of
941 * the first slave added to a bond, and the Fedora networking
942 * scripts always add slaves to a bond in alphabetical order, so
943 * for compatibility we choose the interface with the name that is
944 * first in alphabetical order. */
945 iface = port->ifaces[0];
946 for (j = 1; j < port->n_ifaces; j++) {
947 struct iface *candidate = port->ifaces[j];
948 if (strcmp(candidate->name, iface->name) < 0) {
953 /* The local port doesn't count (since we're trying to choose its
954 * MAC address anyway). */
955 if (iface->dp_ifidx == ODPP_LOCAL) {
960 error = netdev_get_etheraddr(iface->netdev, iface_ea);
962 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
963 VLOG_ERR_RL(&rl, "failed to obtain Ethernet address of %s: %s",
964 iface->name, strerror(error));
969 /* Compare against our current choice. */
970 if (!eth_addr_is_multicast(iface_ea) &&
971 !eth_addr_is_local(iface_ea) &&
972 !eth_addr_is_reserved(iface_ea) &&
973 !eth_addr_is_zero(iface_ea) &&
974 memcmp(iface_ea, ea, ETH_ADDR_LEN) < 0)
976 memcpy(ea, iface_ea, ETH_ADDR_LEN);
977 *hw_addr_iface = iface;
980 if (eth_addr_is_multicast(ea)) {
981 memcpy(ea, br->default_ea, ETH_ADDR_LEN);
982 *hw_addr_iface = NULL;
983 VLOG_WARN("bridge %s: using default bridge Ethernet "
984 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
986 VLOG_DBG("bridge %s: using bridge Ethernet address "ETH_ADDR_FMT,
987 br->name, ETH_ADDR_ARGS(ea));
991 /* Choose and returns the datapath ID for bridge 'br' given that the bridge
992 * Ethernet address is 'bridge_ea'. If 'bridge_ea' is the Ethernet address of
993 * an interface on 'br', then that interface must be passed in as
994 * 'hw_addr_iface'; if 'bridge_ea' was derived some other way, then
995 * 'hw_addr_iface' must be passed in as a null pointer. */
997 bridge_pick_datapath_id(struct bridge *br,
998 const uint8_t bridge_ea[ETH_ADDR_LEN],
999 struct iface *hw_addr_iface)
1002 * The procedure for choosing a bridge MAC address will, in the most
1003 * ordinary case, also choose a unique MAC that we can use as a datapath
1004 * ID. In some special cases, though, multiple bridges will end up with
1005 * the same MAC address. This is OK for the bridges, but it will confuse
1006 * the OpenFlow controller, because each datapath needs a unique datapath
1009 * Datapath IDs must be unique. It is also very desirable that they be
1010 * stable from one run to the next, so that policy set on a datapath
1013 const char *datapath_id;
1016 datapath_id = bridge_get_other_config(br->cfg, "datapath-id");
1017 if (datapath_id && dpid_from_string(datapath_id, &dpid)) {
1021 if (hw_addr_iface) {
1023 if (!netdev_get_vlan_vid(hw_addr_iface->netdev, &vlan)) {
1025 * A bridge whose MAC address is taken from a VLAN network device
1026 * (that is, a network device created with vconfig(8) or similar
1027 * tool) will have the same MAC address as a bridge on the VLAN
1028 * device's physical network device.
1030 * Handle this case by hashing the physical network device MAC
1031 * along with the VLAN identifier.
1033 uint8_t buf[ETH_ADDR_LEN + 2];
1034 memcpy(buf, bridge_ea, ETH_ADDR_LEN);
1035 buf[ETH_ADDR_LEN] = vlan >> 8;
1036 buf[ETH_ADDR_LEN + 1] = vlan;
1037 return dpid_from_hash(buf, sizeof buf);
1040 * Assume that this bridge's MAC address is unique, since it
1041 * doesn't fit any of the cases we handle specially.
1046 * A purely internal bridge, that is, one that has no non-virtual
1047 * network devices on it at all, is more difficult because it has no
1048 * natural unique identifier at all.
1050 * When the host is a XenServer, we handle this case by hashing the
1051 * host's UUID with the name of the bridge. Names of bridges are
1052 * persistent across XenServer reboots, although they can be reused if
1053 * an internal network is destroyed and then a new one is later
1054 * created, so this is fairly effective.
1056 * When the host is not a XenServer, we punt by using a random MAC
1057 * address on each run.
1059 const char *host_uuid = xenserver_get_host_uuid();
1061 char *combined = xasprintf("%s,%s", host_uuid, br->name);
1062 dpid = dpid_from_hash(combined, strlen(combined));
1068 return eth_addr_to_uint64(bridge_ea);
1072 dpid_from_hash(const void *data, size_t n)
1074 uint8_t hash[SHA1_DIGEST_SIZE];
1076 BUILD_ASSERT_DECL(sizeof hash >= ETH_ADDR_LEN);
1077 sha1_bytes(data, n, hash);
1078 eth_addr_mark_random(hash);
1079 return eth_addr_to_uint64(hash);
1085 struct bridge *br, *next;
1089 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
1090 int error = bridge_run_one(br);
1092 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1093 VLOG_ERR_RL(&rl, "bridge %s: datapath was destroyed externally, "
1094 "forcing reconfiguration", br->name);
1108 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1109 ofproto_wait(br->ofproto);
1110 if (ofproto_has_controller(br->ofproto)) {
1114 mac_learning_wait(br->ml);
1119 /* Forces 'br' to revalidate all of its flows. This is appropriate when 'br''s
1120 * configuration changes. */
1122 bridge_flush(struct bridge *br)
1124 COVERAGE_INC(bridge_flush);
1126 mac_learning_flush(br->ml);
1129 /* Returns the 'br' interface for the ODPP_LOCAL port, or null if 'br' has no
1130 * such interface. */
1131 static struct iface *
1132 bridge_get_local_iface(struct bridge *br)
1136 for (i = 0; i < br->n_ports; i++) {
1137 struct port *port = br->ports[i];
1138 for (j = 0; j < port->n_ifaces; j++) {
1139 struct iface *iface = port->ifaces[j];
1140 if (iface->dp_ifidx == ODPP_LOCAL) {
1149 /* Bridge unixctl user interface functions. */
1151 bridge_unixctl_fdb_show(struct unixctl_conn *conn,
1152 const char *args, void *aux OVS_UNUSED)
1154 struct ds ds = DS_EMPTY_INITIALIZER;
1155 const struct bridge *br;
1156 const struct mac_entry *e;
1158 br = bridge_lookup(args);
1160 unixctl_command_reply(conn, 501, "no such bridge");
1164 ds_put_cstr(&ds, " port VLAN MAC Age\n");
1165 LIST_FOR_EACH (e, struct mac_entry, lru_node, &br->ml->lrus) {
1166 if (e->port < 0 || e->port >= br->n_ports) {
1169 ds_put_format(&ds, "%5d %4d "ETH_ADDR_FMT" %3d\n",
1170 br->ports[e->port]->ifaces[0]->dp_ifidx,
1171 e->vlan, ETH_ADDR_ARGS(e->mac), mac_entry_age(e));
1173 unixctl_command_reply(conn, 200, ds_cstr(&ds));
1177 /* Bridge reconfiguration functions. */
1178 static struct bridge *
1179 bridge_create(const struct ovsrec_bridge *br_cfg)
1184 assert(!bridge_lookup(br_cfg->name));
1185 br = xzalloc(sizeof *br);
1187 error = dpif_create_and_open(br_cfg->name, br_cfg->datapath_type,
1193 dpif_flow_flush(br->dpif);
1195 error = ofproto_create(br_cfg->name, br_cfg->datapath_type, &bridge_ofhooks,
1198 VLOG_ERR("failed to create switch %s: %s", br_cfg->name,
1200 dpif_delete(br->dpif);
1201 dpif_close(br->dpif);
1206 br->name = xstrdup(br_cfg->name);
1208 br->ml = mac_learning_create();
1209 br->sent_config_request = false;
1210 eth_addr_nicira_random(br->default_ea);
1212 port_array_init(&br->ifaces);
1214 shash_init(&br->port_by_name);
1215 shash_init(&br->iface_by_name);
1219 list_push_back(&all_bridges, &br->node);
1221 VLOG_INFO("created bridge %s on %s", br->name, dpif_name(br->dpif));
1227 bridge_destroy(struct bridge *br)
1232 while (br->n_ports > 0) {
1233 port_destroy(br->ports[br->n_ports - 1]);
1235 list_remove(&br->node);
1236 error = dpif_delete(br->dpif);
1237 if (error && error != ENOENT) {
1238 VLOG_ERR("failed to delete %s: %s",
1239 dpif_name(br->dpif), strerror(error));
1241 dpif_close(br->dpif);
1242 ofproto_destroy(br->ofproto);
1243 mac_learning_destroy(br->ml);
1244 port_array_destroy(&br->ifaces);
1245 shash_destroy(&br->port_by_name);
1246 shash_destroy(&br->iface_by_name);
1253 static struct bridge *
1254 bridge_lookup(const char *name)
1258 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1259 if (!strcmp(br->name, name)) {
1267 bridge_exists(const char *name)
1269 return bridge_lookup(name) ? true : false;
1273 bridge_get_datapathid(const char *name)
1275 struct bridge *br = bridge_lookup(name);
1276 return br ? ofproto_get_datapath_id(br->ofproto) : 0;
1279 /* Handle requests for a listing of all flows known by the OpenFlow
1280 * stack, including those normally hidden. */
1282 bridge_unixctl_dump_flows(struct unixctl_conn *conn,
1283 const char *args, void *aux OVS_UNUSED)
1288 br = bridge_lookup(args);
1290 unixctl_command_reply(conn, 501, "Unknown bridge");
1295 ofproto_get_all_flows(br->ofproto, &results);
1297 unixctl_command_reply(conn, 200, ds_cstr(&results));
1298 ds_destroy(&results);
1302 bridge_run_one(struct bridge *br)
1306 error = ofproto_run1(br->ofproto);
1311 mac_learning_run(br->ml, ofproto_get_revalidate_set(br->ofproto));
1314 error = ofproto_run2(br->ofproto, br->flush);
1321 bridge_get_controllers(const struct ovsrec_open_vswitch *ovs_cfg,
1322 const struct bridge *br,
1323 struct ovsrec_controller ***controllersp)
1325 struct ovsrec_controller **controllers;
1326 size_t n_controllers;
1328 if (br->cfg->n_controller) {
1329 controllers = br->cfg->controller;
1330 n_controllers = br->cfg->n_controller;
1332 controllers = ovs_cfg->controller;
1333 n_controllers = ovs_cfg->n_controller;
1336 if (n_controllers == 1 && !strcmp(controllers[0]->target, "none")) {
1342 *controllersp = controllers;
1344 return n_controllers;
1348 bridge_update_desc(struct bridge *br OVS_UNUSED)
1351 bool changed = false;
1354 desc = cfg_get_string(0, "bridge.%s.mfr-desc", br->name);
1355 if (desc != br->mfr_desc) {
1358 br->mfr_desc = xstrdup(desc);
1360 br->mfr_desc = xstrdup(DEFAULT_MFR_DESC);
1365 desc = cfg_get_string(0, "bridge.%s.hw-desc", br->name);
1366 if (desc != br->hw_desc) {
1369 br->hw_desc = xstrdup(desc);
1371 br->hw_desc = xstrdup(DEFAULT_HW_DESC);
1376 desc = cfg_get_string(0, "bridge.%s.sw-desc", br->name);
1377 if (desc != br->sw_desc) {
1380 br->sw_desc = xstrdup(desc);
1382 br->sw_desc = xstrdup(DEFAULT_SW_DESC);
1387 desc = cfg_get_string(0, "bridge.%s.serial-desc", br->name);
1388 if (desc != br->serial_desc) {
1389 free(br->serial_desc);
1391 br->serial_desc = xstrdup(desc);
1393 br->serial_desc = xstrdup(DEFAULT_SERIAL_DESC);
1398 desc = cfg_get_string(0, "bridge.%s.dp-desc", br->name);
1399 if (desc != br->dp_desc) {
1402 br->dp_desc = xstrdup(desc);
1404 br->dp_desc = xstrdup(DEFAULT_DP_DESC);
1410 ofproto_set_desc(br->ofproto, br->mfr_desc, br->hw_desc,
1411 br->sw_desc, br->serial_desc, br->dp_desc);
1417 bridge_reconfigure_one(const struct ovsrec_open_vswitch *ovs_cfg,
1420 struct shash old_ports, new_ports;
1421 struct svec listeners, old_listeners;
1422 struct svec snoops, old_snoops;
1423 struct shash_node *node;
1426 /* Collect old ports. */
1427 shash_init(&old_ports);
1428 for (i = 0; i < br->n_ports; i++) {
1429 shash_add(&old_ports, br->ports[i]->name, br->ports[i]);
1432 /* Collect new ports. */
1433 shash_init(&new_ports);
1434 for (i = 0; i < br->cfg->n_ports; i++) {
1435 const char *name = br->cfg->ports[i]->name;
1436 if (!shash_add_once(&new_ports, name, br->cfg->ports[i])) {
1437 VLOG_WARN("bridge %s: %s specified twice as bridge port",
1442 /* If we have a controller, then we need a local port. Complain if the
1443 * user didn't specify one.
1445 * XXX perhaps we should synthesize a port ourselves in this case. */
1446 if (bridge_get_controllers(ovs_cfg, br, NULL)) {
1447 char local_name[IF_NAMESIZE];
1450 error = dpif_port_get_name(br->dpif, ODPP_LOCAL,
1451 local_name, sizeof local_name);
1452 if (!error && !shash_find(&new_ports, local_name)) {
1453 VLOG_WARN("bridge %s: controller specified but no local port "
1454 "(port named %s) defined",
1455 br->name, local_name);
1459 /* Get rid of deleted ports.
1460 * Get rid of deleted interfaces on ports that still exist. */
1461 SHASH_FOR_EACH (node, &old_ports) {
1462 struct port *port = node->data;
1463 const struct ovsrec_port *port_cfg;
1465 port_cfg = shash_find_data(&new_ports, node->name);
1469 port_del_ifaces(port, port_cfg);
1473 /* Create new ports.
1474 * Add new interfaces to existing ports.
1475 * Reconfigure existing ports. */
1476 SHASH_FOR_EACH (node, &new_ports) {
1477 struct port *port = shash_find_data(&old_ports, node->name);
1479 port = port_create(br, node->name);
1482 port_reconfigure(port, node->data);
1483 if (!port->n_ifaces) {
1484 VLOG_WARN("bridge %s: port %s has no interfaces, dropping",
1485 br->name, port->name);
1489 shash_destroy(&old_ports);
1490 shash_destroy(&new_ports);
1492 /* Delete all flows if we're switching from connected to standalone or vice
1493 * versa. (XXX Should we delete all flows if we are switching from one
1494 * controller to another?) */
1497 /* Configure OpenFlow management listeners. */
1498 svec_init(&listeners);
1499 cfg_get_all_strings(&listeners, "bridge.%s.openflow.listeners", br->name);
1501 svec_add_nocopy(&listeners, xasprintf("punix:%s/%s.mgmt",
1502 ovs_rundir, br->name));
1503 } else if (listeners.n == 1 && !strcmp(listeners.names[0], "none")) {
1504 svec_clear(&listeners);
1506 svec_sort_unique(&listeners);
1508 svec_init(&old_listeners);
1509 ofproto_get_listeners(br->ofproto, &old_listeners);
1510 svec_sort_unique(&old_listeners);
1512 if (!svec_equal(&listeners, &old_listeners)) {
1513 ofproto_set_listeners(br->ofproto, &listeners);
1515 svec_destroy(&listeners);
1516 svec_destroy(&old_listeners);
1518 /* Configure OpenFlow controller connection snooping. */
1520 cfg_get_all_strings(&snoops, "bridge.%s.openflow.snoops", br->name);
1522 svec_add_nocopy(&snoops, xasprintf("punix:%s/%s.snoop",
1523 ovs_rundir, br->name));
1524 } else if (snoops.n == 1 && !strcmp(snoops.names[0], "none")) {
1525 svec_clear(&snoops);
1527 svec_sort_unique(&snoops);
1529 svec_init(&old_snoops);
1530 ofproto_get_snoops(br->ofproto, &old_snoops);
1531 svec_sort_unique(&old_snoops);
1533 if (!svec_equal(&snoops, &old_snoops)) {
1534 ofproto_set_snoops(br->ofproto, &snoops);
1536 svec_destroy(&snoops);
1537 svec_destroy(&old_snoops);
1539 /* Default listener. */
1540 svec_init(&listeners);
1541 svec_add_nocopy(&listeners, xasprintf("punix:%s/%s.mgmt",
1542 ovs_rundir, br->name));
1543 svec_init(&old_listeners);
1544 ofproto_get_listeners(br->ofproto, &old_listeners);
1545 if (!svec_equal(&listeners, &old_listeners)) {
1546 ofproto_set_listeners(br->ofproto, &listeners);
1548 svec_destroy(&listeners);
1549 svec_destroy(&old_listeners);
1551 /* Default snoop. */
1553 svec_add_nocopy(&snoops, xasprintf("punix:%s/%s.snoop",
1554 ovs_rundir, br->name));
1555 svec_init(&old_snoops);
1556 ofproto_get_snoops(br->ofproto, &old_snoops);
1557 if (!svec_equal(&snoops, &old_snoops)) {
1558 ofproto_set_snoops(br->ofproto, &snoops);
1560 svec_destroy(&snoops);
1561 svec_destroy(&old_snoops);
1564 mirror_reconfigure(br);
1566 bridge_update_desc(br);
1570 bridge_reconfigure_remotes(const struct ovsrec_open_vswitch *ovs_cfg,
1572 const struct sockaddr_in *managers,
1575 struct ovsrec_controller **controllers;
1576 size_t n_controllers;
1578 ofproto_set_extra_in_band_remotes(br->ofproto, managers, n_managers);
1580 n_controllers = bridge_get_controllers(ovs_cfg, br, &controllers);
1581 if (ofproto_has_controller(br->ofproto) != (n_controllers != 0)) {
1582 ofproto_flush_flows(br->ofproto);
1585 if (!n_controllers) {
1586 union ofp_action action;
1589 /* Clear out controllers. */
1590 ofproto_set_controllers(br->ofproto, NULL, 0);
1592 /* Set up a flow that matches every packet and directs them to
1593 * OFPP_NORMAL (which goes to us). */
1594 memset(&action, 0, sizeof action);
1595 action.type = htons(OFPAT_OUTPUT);
1596 action.output.len = htons(sizeof action);
1597 action.output.port = htons(OFPP_NORMAL);
1598 memset(&flow, 0, sizeof flow);
1599 ofproto_add_flow(br->ofproto, &flow, OVSFW_ALL, 0, &action, 1, 0);
1601 struct ofproto_controller *ocs;
1604 ocs = xmalloc(n_controllers * sizeof *ocs);
1605 for (i = 0; i < n_controllers; i++) {
1606 struct ovsrec_controller *c = controllers[i];
1607 struct ofproto_controller *oc = &ocs[i];
1609 if (strcmp(c->target, "discover")) {
1610 struct iface *local_iface;
1613 local_iface = bridge_get_local_iface(br);
1614 if (local_iface && c->local_ip
1615 && inet_aton(c->local_ip, &ip)) {
1616 struct netdev *netdev = local_iface->netdev;
1617 struct in_addr mask, gateway;
1619 if (!c->local_netmask
1620 || !inet_aton(c->local_netmask, &mask)) {
1623 if (!c->local_gateway
1624 || !inet_aton(c->local_gateway, &gateway)) {
1628 netdev_turn_flags_on(netdev, NETDEV_UP, true);
1630 mask.s_addr = guess_netmask(ip.s_addr);
1632 if (!netdev_set_in4(netdev, ip, mask)) {
1633 VLOG_INFO("bridge %s: configured IP address "IP_FMT", "
1635 br->name, IP_ARGS(&ip.s_addr),
1636 IP_ARGS(&mask.s_addr));
1639 if (gateway.s_addr) {
1640 if (!netdev_add_router(netdev, gateway)) {
1641 VLOG_INFO("bridge %s: configured gateway "IP_FMT,
1642 br->name, IP_ARGS(&gateway.s_addr));
1648 oc->target = c->target;
1649 oc->max_backoff = c->max_backoff ? *c->max_backoff / 1000 : 8;
1650 oc->probe_interval = (c->inactivity_probe
1651 ? *c->inactivity_probe / 1000 : 5);
1652 oc->fail = (!c->fail_mode
1653 || !strcmp(c->fail_mode, "standalone")
1654 || !strcmp(c->fail_mode, "open")
1655 ? OFPROTO_FAIL_STANDALONE
1656 : OFPROTO_FAIL_SECURE);
1657 oc->band = (!c->connection_mode
1658 || !strcmp(c->connection_mode, "in-band")
1660 : OFPROTO_OUT_OF_BAND);
1661 oc->accept_re = c->discover_accept_regex;
1662 oc->update_resolv_conf = c->discover_update_resolv_conf;
1663 oc->rate_limit = (c->controller_rate_limit
1664 ? *c->controller_rate_limit : 0);
1665 oc->burst_limit = (c->controller_burst_limit
1666 ? *c->controller_burst_limit : 0);
1668 ofproto_set_controllers(br->ofproto, ocs, n_controllers);
1674 bridge_get_all_ifaces(const struct bridge *br, struct shash *ifaces)
1679 for (i = 0; i < br->n_ports; i++) {
1680 struct port *port = br->ports[i];
1681 for (j = 0; j < port->n_ifaces; j++) {
1682 struct iface *iface = port->ifaces[j];
1683 shash_add_once(ifaces, iface->name, iface);
1685 if (port->n_ifaces > 1 && port->cfg->bond_fake_iface) {
1686 shash_add_once(ifaces, port->name, NULL);
1691 /* For robustness, in case the administrator moves around datapath ports behind
1692 * our back, we re-check all the datapath port numbers here.
1694 * This function will set the 'dp_ifidx' members of interfaces that have
1695 * disappeared to -1, so only call this function from a context where those
1696 * 'struct iface's will be removed from the bridge. Otherwise, the -1
1697 * 'dp_ifidx'es will cause trouble later when we try to send them to the
1698 * datapath, which doesn't support UINT16_MAX+1 ports. */
1700 bridge_fetch_dp_ifaces(struct bridge *br)
1702 struct odp_port *dpif_ports;
1703 size_t n_dpif_ports;
1706 /* Reset all interface numbers. */
1707 for (i = 0; i < br->n_ports; i++) {
1708 struct port *port = br->ports[i];
1709 for (j = 0; j < port->n_ifaces; j++) {
1710 struct iface *iface = port->ifaces[j];
1711 iface->dp_ifidx = -1;
1714 port_array_clear(&br->ifaces);
1716 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
1717 for (i = 0; i < n_dpif_ports; i++) {
1718 struct odp_port *p = &dpif_ports[i];
1719 struct iface *iface = iface_lookup(br, p->devname);
1721 if (iface->dp_ifidx >= 0) {
1722 VLOG_WARN("%s reported interface %s twice",
1723 dpif_name(br->dpif), p->devname);
1724 } else if (iface_from_dp_ifidx(br, p->port)) {
1725 VLOG_WARN("%s reported interface %"PRIu16" twice",
1726 dpif_name(br->dpif), p->port);
1728 port_array_set(&br->ifaces, p->port, iface);
1729 iface->dp_ifidx = p->port;
1733 int64_t ofport = (iface->dp_ifidx >= 0
1734 ? odp_port_to_ofp_port(iface->dp_ifidx)
1736 ovsrec_interface_set_ofport(iface->cfg, &ofport, 1);
1743 /* Bridge packet processing functions. */
1746 bond_hash(const uint8_t mac[ETH_ADDR_LEN])
1748 return hash_bytes(mac, ETH_ADDR_LEN, 0) & BOND_MASK;
1751 static struct bond_entry *
1752 lookup_bond_entry(const struct port *port, const uint8_t mac[ETH_ADDR_LEN])
1754 return &port->bond_hash[bond_hash(mac)];
1758 bond_choose_iface(const struct port *port)
1760 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1761 size_t i, best_down_slave = -1;
1762 long long next_delay_expiration = LLONG_MAX;
1764 for (i = 0; i < port->n_ifaces; i++) {
1765 struct iface *iface = port->ifaces[i];
1767 if (iface->enabled) {
1769 } else if (iface->delay_expires < next_delay_expiration) {
1770 best_down_slave = i;
1771 next_delay_expiration = iface->delay_expires;
1775 if (best_down_slave != -1) {
1776 struct iface *iface = port->ifaces[best_down_slave];
1778 VLOG_INFO_RL(&rl, "interface %s: skipping remaining %lli ms updelay "
1779 "since no other interface is up", iface->name,
1780 iface->delay_expires - time_msec());
1781 bond_enable_slave(iface, true);
1784 return best_down_slave;
1788 choose_output_iface(const struct port *port, const uint8_t *dl_src,
1789 uint16_t *dp_ifidx, tag_type *tags)
1791 struct iface *iface;
1793 assert(port->n_ifaces);
1794 if (port->n_ifaces == 1) {
1795 iface = port->ifaces[0];
1797 struct bond_entry *e = lookup_bond_entry(port, dl_src);
1798 if (e->iface_idx < 0 || e->iface_idx >= port->n_ifaces
1799 || !port->ifaces[e->iface_idx]->enabled) {
1800 /* XXX select interface properly. The current interface selection
1801 * is only good for testing the rebalancing code. */
1802 e->iface_idx = bond_choose_iface(port);
1803 if (e->iface_idx < 0) {
1804 *tags |= port->no_ifaces_tag;
1807 e->iface_tag = tag_create_random();
1808 ((struct port *) port)->bond_compat_is_stale = true;
1810 *tags |= e->iface_tag;
1811 iface = port->ifaces[e->iface_idx];
1813 *dp_ifidx = iface->dp_ifidx;
1814 *tags |= iface->tag; /* Currently only used for bonding. */
1819 bond_link_status_update(struct iface *iface, bool carrier)
1821 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1822 struct port *port = iface->port;
1824 if ((carrier == iface->enabled) == (iface->delay_expires == LLONG_MAX)) {
1825 /* Nothing to do. */
1828 VLOG_INFO_RL(&rl, "interface %s: carrier %s",
1829 iface->name, carrier ? "detected" : "dropped");
1830 if (carrier == iface->enabled) {
1831 iface->delay_expires = LLONG_MAX;
1832 VLOG_INFO_RL(&rl, "interface %s: will not be %s",
1833 iface->name, carrier ? "disabled" : "enabled");
1834 } else if (carrier && port->active_iface < 0) {
1835 bond_enable_slave(iface, true);
1836 if (port->updelay) {
1837 VLOG_INFO_RL(&rl, "interface %s: skipping %d ms updelay since no "
1838 "other interface is up", iface->name, port->updelay);
1841 int delay = carrier ? port->updelay : port->downdelay;
1842 iface->delay_expires = time_msec() + delay;
1845 "interface %s: will be %s if it stays %s for %d ms",
1847 carrier ? "enabled" : "disabled",
1848 carrier ? "up" : "down",
1855 bond_choose_active_iface(struct port *port)
1857 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1859 port->active_iface = bond_choose_iface(port);
1860 port->active_iface_tag = tag_create_random();
1861 if (port->active_iface >= 0) {
1862 VLOG_INFO_RL(&rl, "port %s: active interface is now %s",
1863 port->name, port->ifaces[port->active_iface]->name);
1865 VLOG_WARN_RL(&rl, "port %s: all ports disabled, no active interface",
1871 bond_enable_slave(struct iface *iface, bool enable)
1873 struct port *port = iface->port;
1874 struct bridge *br = port->bridge;
1876 /* This acts as a recursion check. If the act of disabling a slave
1877 * causes a different slave to be enabled, the flag will allow us to
1878 * skip redundant work when we reenter this function. It must be
1879 * cleared on exit to keep things safe with multiple bonds. */
1880 static bool moving_active_iface = false;
1882 iface->delay_expires = LLONG_MAX;
1883 if (enable == iface->enabled) {
1887 iface->enabled = enable;
1888 if (!iface->enabled) {
1889 VLOG_WARN("interface %s: disabled", iface->name);
1890 ofproto_revalidate(br->ofproto, iface->tag);
1891 if (iface->port_ifidx == port->active_iface) {
1892 ofproto_revalidate(br->ofproto,
1893 port->active_iface_tag);
1895 /* Disabling a slave can lead to another slave being immediately
1896 * enabled if there will be no active slaves but one is waiting
1897 * on an updelay. In this case we do not need to run most of the
1898 * code for the newly enabled slave since there was no period
1899 * without an active slave and it is redundant with the disabling
1901 moving_active_iface = true;
1902 bond_choose_active_iface(port);
1904 bond_send_learning_packets(port);
1906 VLOG_WARN("interface %s: enabled", iface->name);
1907 if (port->active_iface < 0 && !moving_active_iface) {
1908 ofproto_revalidate(br->ofproto, port->no_ifaces_tag);
1909 bond_choose_active_iface(port);
1910 bond_send_learning_packets(port);
1912 iface->tag = tag_create_random();
1915 moving_active_iface = false;
1916 port->bond_compat_is_stale = true;
1919 /* Attempts to make the sum of the bond slaves' statistics appear on the fake
1920 * bond interface. */
1922 bond_update_fake_iface_stats(struct port *port)
1924 struct netdev_stats bond_stats;
1925 struct netdev *bond_dev;
1928 memset(&bond_stats, 0, sizeof bond_stats);
1930 for (i = 0; i < port->n_ifaces; i++) {
1931 struct netdev_stats slave_stats;
1933 if (!netdev_get_stats(port->ifaces[i]->netdev, &slave_stats)) {
1934 bond_stats.rx_packets += slave_stats.rx_packets;
1935 bond_stats.rx_bytes += slave_stats.rx_bytes;
1936 bond_stats.tx_packets += slave_stats.tx_packets;
1937 bond_stats.tx_bytes += slave_stats.tx_bytes;
1941 if (!netdev_open_default(port->name, &bond_dev)) {
1942 netdev_set_stats(bond_dev, &bond_stats);
1943 netdev_close(bond_dev);
1948 bond_run(struct bridge *br)
1952 for (i = 0; i < br->n_ports; i++) {
1953 struct port *port = br->ports[i];
1955 if (port->n_ifaces >= 2) {
1956 for (j = 0; j < port->n_ifaces; j++) {
1957 struct iface *iface = port->ifaces[j];
1958 if (time_msec() >= iface->delay_expires) {
1959 bond_enable_slave(iface, !iface->enabled);
1963 if (port->bond_fake_iface
1964 && time_msec() >= port->bond_next_fake_iface_update) {
1965 bond_update_fake_iface_stats(port);
1966 port->bond_next_fake_iface_update = time_msec() + 1000;
1970 if (port->bond_compat_is_stale) {
1971 port->bond_compat_is_stale = false;
1972 port_update_bond_compat(port);
1978 bond_wait(struct bridge *br)
1982 for (i = 0; i < br->n_ports; i++) {
1983 struct port *port = br->ports[i];
1984 if (port->n_ifaces < 2) {
1987 for (j = 0; j < port->n_ifaces; j++) {
1988 struct iface *iface = port->ifaces[j];
1989 if (iface->delay_expires != LLONG_MAX) {
1990 poll_timer_wait_until(iface->delay_expires);
1993 if (port->bond_fake_iface) {
1994 poll_timer_wait_until(port->bond_next_fake_iface_update);
2000 set_dst(struct dst *p, const flow_t *flow,
2001 const struct port *in_port, const struct port *out_port,
2004 p->vlan = (out_port->vlan >= 0 ? OFP_VLAN_NONE
2005 : in_port->vlan >= 0 ? in_port->vlan
2006 : ntohs(flow->dl_vlan));
2007 return choose_output_iface(out_port, flow->dl_src, &p->dp_ifidx, tags);
2011 swap_dst(struct dst *p, struct dst *q)
2013 struct dst tmp = *p;
2018 /* Moves all the dsts with vlan == 'vlan' to the front of the 'n_dsts' in
2019 * 'dsts'. (This may help performance by reducing the number of VLAN changes
2020 * that we push to the datapath. We could in fact fully sort the array by
2021 * vlan, but in most cases there are at most two different vlan tags so that's
2022 * possibly overkill.) */
2024 partition_dsts(struct dst *dsts, size_t n_dsts, int vlan)
2026 struct dst *first = dsts;
2027 struct dst *last = dsts + n_dsts;
2029 while (first != last) {
2031 * - All dsts < first have vlan == 'vlan'.
2032 * - All dsts >= last have vlan != 'vlan'.
2033 * - first < last. */
2034 while (first->vlan == vlan) {
2035 if (++first == last) {
2040 /* Same invariants, plus one additional:
2041 * - first->vlan != vlan.
2043 while (last[-1].vlan != vlan) {
2044 if (--last == first) {
2049 /* Same invariants, plus one additional:
2050 * - last[-1].vlan == vlan.*/
2051 swap_dst(first++, --last);
2056 mirror_mask_ffs(mirror_mask_t mask)
2058 BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
2063 dst_is_duplicate(const struct dst *dsts, size_t n_dsts,
2064 const struct dst *test)
2067 for (i = 0; i < n_dsts; i++) {
2068 if (dsts[i].vlan == test->vlan && dsts[i].dp_ifidx == test->dp_ifidx) {
2076 port_trunks_vlan(const struct port *port, uint16_t vlan)
2078 return (port->vlan < 0
2079 && (!port->trunks || bitmap_is_set(port->trunks, vlan)));
2083 port_includes_vlan(const struct port *port, uint16_t vlan)
2085 return vlan == port->vlan || port_trunks_vlan(port, vlan);
2089 compose_dsts(const struct bridge *br, const flow_t *flow, uint16_t vlan,
2090 const struct port *in_port, const struct port *out_port,
2091 struct dst dsts[], tag_type *tags, uint16_t *nf_output_iface)
2093 mirror_mask_t mirrors = in_port->src_mirrors;
2094 struct dst *dst = dsts;
2097 if (out_port == FLOOD_PORT) {
2098 /* XXX use ODP_FLOOD if no vlans or bonding. */
2099 /* XXX even better, define each VLAN as a datapath port group */
2100 for (i = 0; i < br->n_ports; i++) {
2101 struct port *port = br->ports[i];
2102 if (port != in_port && port_includes_vlan(port, vlan)
2103 && !port->is_mirror_output_port
2104 && set_dst(dst, flow, in_port, port, tags)) {
2105 mirrors |= port->dst_mirrors;
2109 *nf_output_iface = NF_OUT_FLOOD;
2110 } else if (out_port && set_dst(dst, flow, in_port, out_port, tags)) {
2111 *nf_output_iface = dst->dp_ifidx;
2112 mirrors |= out_port->dst_mirrors;
2117 struct mirror *m = br->mirrors[mirror_mask_ffs(mirrors) - 1];
2118 if (!m->n_vlans || vlan_is_mirrored(m, vlan)) {
2120 if (set_dst(dst, flow, in_port, m->out_port, tags)
2121 && !dst_is_duplicate(dsts, dst - dsts, dst)) {
2125 for (i = 0; i < br->n_ports; i++) {
2126 struct port *port = br->ports[i];
2127 if (port_includes_vlan(port, m->out_vlan)
2128 && set_dst(dst, flow, in_port, port, tags))
2132 if (port->vlan < 0) {
2133 dst->vlan = m->out_vlan;
2135 if (dst_is_duplicate(dsts, dst - dsts, dst)) {
2139 /* Use the vlan tag on the original flow instead of
2140 * the one passed in the vlan parameter. This ensures
2141 * that we compare the vlan from before any implicit
2142 * tagging tags place. This is necessary because
2143 * dst->vlan is the final vlan, after removing implicit
2145 flow_vlan = ntohs(flow->dl_vlan);
2146 if (flow_vlan == 0) {
2147 flow_vlan = OFP_VLAN_NONE;
2149 if (port == in_port && dst->vlan == flow_vlan) {
2150 /* Don't send out input port on same VLAN. */
2158 mirrors &= mirrors - 1;
2161 partition_dsts(dsts, dst - dsts, ntohs(flow->dl_vlan));
2165 static void OVS_UNUSED
2166 print_dsts(const struct dst *dsts, size_t n)
2168 for (; n--; dsts++) {
2169 printf(">p%"PRIu16, dsts->dp_ifidx);
2170 if (dsts->vlan != OFP_VLAN_NONE) {
2171 printf("v%"PRIu16, dsts->vlan);
2177 compose_actions(struct bridge *br, const flow_t *flow, uint16_t vlan,
2178 const struct port *in_port, const struct port *out_port,
2179 tag_type *tags, struct odp_actions *actions,
2180 uint16_t *nf_output_iface)
2182 struct dst dsts[DP_MAX_PORTS * (MAX_MIRRORS + 1)];
2184 const struct dst *p;
2187 n_dsts = compose_dsts(br, flow, vlan, in_port, out_port, dsts, tags,
2190 cur_vlan = ntohs(flow->dl_vlan);
2191 for (p = dsts; p < &dsts[n_dsts]; p++) {
2192 union odp_action *a;
2193 if (p->vlan != cur_vlan) {
2194 if (p->vlan == OFP_VLAN_NONE) {
2195 odp_actions_add(actions, ODPAT_STRIP_VLAN);
2197 a = odp_actions_add(actions, ODPAT_SET_VLAN_VID);
2198 a->vlan_vid.vlan_vid = htons(p->vlan);
2202 a = odp_actions_add(actions, ODPAT_OUTPUT);
2203 a->output.port = p->dp_ifidx;
2207 /* Returns the effective vlan of a packet, taking into account both the
2208 * 802.1Q header and implicitly tagged ports. A value of 0 indicates that
2209 * the packet is untagged and -1 indicates it has an invalid header and
2210 * should be dropped. */
2211 static int flow_get_vlan(struct bridge *br, const flow_t *flow,
2212 struct port *in_port, bool have_packet)
2214 /* Note that dl_vlan of 0 and of OFP_VLAN_NONE both mean that the packet
2215 * belongs to VLAN 0, so we should treat both cases identically. (In the
2216 * former case, the packet has an 802.1Q header that specifies VLAN 0,
2217 * presumably to allow a priority to be specified. In the latter case, the
2218 * packet does not have any 802.1Q header.) */
2219 int vlan = ntohs(flow->dl_vlan);
2220 if (vlan == OFP_VLAN_NONE) {
2223 if (in_port->vlan >= 0) {
2225 /* XXX support double tagging? */
2227 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2228 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
2229 "packet received on port %s configured with "
2230 "implicit VLAN %"PRIu16,
2231 br->name, ntohs(flow->dl_vlan),
2232 in_port->name, in_port->vlan);
2236 vlan = in_port->vlan;
2238 if (!port_includes_vlan(in_port, vlan)) {
2240 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2241 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
2242 "packet received on port %s not configured for "
2244 br->name, vlan, in_port->name, vlan);
2254 update_learning_table(struct bridge *br, const flow_t *flow, int vlan,
2255 struct port *in_port)
2257 tag_type rev_tag = mac_learning_learn(br->ml, flow->dl_src,
2258 vlan, in_port->port_idx);
2260 /* The log messages here could actually be useful in debugging,
2261 * so keep the rate limit relatively high. */
2262 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30,
2264 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
2265 "on port %s in VLAN %d",
2266 br->name, ETH_ADDR_ARGS(flow->dl_src),
2267 in_port->name, vlan);
2268 ofproto_revalidate(br->ofproto, rev_tag);
2273 is_bcast_arp_reply(const flow_t *flow)
2275 return (flow->dl_type == htons(ETH_TYPE_ARP)
2276 && flow->nw_proto == ARP_OP_REPLY
2277 && eth_addr_is_broadcast(flow->dl_dst));
2280 /* Determines whether packets in 'flow' within 'br' should be forwarded or
2281 * dropped. Returns true if they may be forwarded, false if they should be
2284 * If 'have_packet' is true, it indicates that the caller is processing a
2285 * received packet. If 'have_packet' is false, then the caller is just
2286 * revalidating an existing flow because configuration has changed. Either
2287 * way, 'have_packet' only affects logging (there is no point in logging errors
2288 * during revalidation).
2290 * Sets '*in_portp' to the input port. This will be a null pointer if
2291 * flow->in_port does not designate a known input port (in which case
2292 * is_admissible() returns false).
2294 * When returning true, sets '*vlanp' to the effective VLAN of the input
2295 * packet, as returned by flow_get_vlan().
2297 * May also add tags to '*tags', although the current implementation only does
2298 * so in one special case.
2301 is_admissible(struct bridge *br, const flow_t *flow, bool have_packet,
2302 tag_type *tags, int *vlanp, struct port **in_portp)
2304 struct iface *in_iface;
2305 struct port *in_port;
2308 /* Find the interface and port structure for the received packet. */
2309 in_iface = iface_from_dp_ifidx(br, flow->in_port);
2311 /* No interface? Something fishy... */
2313 /* Odd. A few possible reasons here:
2315 * - We deleted an interface but there are still a few packets
2316 * queued up from it.
2318 * - Someone externally added an interface (e.g. with "ovs-dpctl
2319 * add-if") that we don't know about.
2321 * - Packet arrived on the local port but the local port is not
2322 * one of our bridge ports.
2324 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2326 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
2327 "interface %"PRIu16, br->name, flow->in_port);
2333 *in_portp = in_port = in_iface->port;
2334 *vlanp = vlan = flow_get_vlan(br, flow, in_port, have_packet);
2339 /* Drop frames for reserved multicast addresses. */
2340 if (eth_addr_is_reserved(flow->dl_dst)) {
2344 /* Drop frames on ports reserved for mirroring. */
2345 if (in_port->is_mirror_output_port) {
2347 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2348 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
2349 "%s, which is reserved exclusively for mirroring",
2350 br->name, in_port->name);
2355 /* Packets received on bonds need special attention to avoid duplicates. */
2356 if (in_port->n_ifaces > 1) {
2359 if (eth_addr_is_multicast(flow->dl_dst)) {
2360 *tags |= in_port->active_iface_tag;
2361 if (in_port->active_iface != in_iface->port_ifidx) {
2362 /* Drop all multicast packets on inactive slaves. */
2367 /* Drop all packets for which we have learned a different input
2368 * port, because we probably sent the packet on one slave and got
2369 * it back on the other. Broadcast ARP replies are an exception
2370 * to this rule: the host has moved to another switch. */
2371 src_idx = mac_learning_lookup(br->ml, flow->dl_src, vlan);
2372 if (src_idx != -1 && src_idx != in_port->port_idx &&
2373 !is_bcast_arp_reply(flow)) {
2381 /* If the composed actions may be applied to any packet in the given 'flow',
2382 * returns true. Otherwise, the actions should only be applied to 'packet', or
2383 * not at all, if 'packet' was NULL. */
2385 process_flow(struct bridge *br, const flow_t *flow,
2386 const struct ofpbuf *packet, struct odp_actions *actions,
2387 tag_type *tags, uint16_t *nf_output_iface)
2389 struct port *in_port;
2390 struct port *out_port;
2394 /* Check whether we should drop packets in this flow. */
2395 if (!is_admissible(br, flow, packet != NULL, tags, &vlan, &in_port)) {
2400 /* Learn source MAC (but don't try to learn from revalidation). */
2402 update_learning_table(br, flow, vlan, in_port);
2405 /* Determine output port. */
2406 out_port_idx = mac_learning_lookup_tag(br->ml, flow->dl_dst, vlan, tags);
2407 if (out_port_idx >= 0 && out_port_idx < br->n_ports) {
2408 out_port = br->ports[out_port_idx];
2409 } else if (!packet && !eth_addr_is_multicast(flow->dl_dst)) {
2410 /* If we are revalidating but don't have a learning entry then
2411 * eject the flow. Installing a flow that floods packets opens
2412 * up a window of time where we could learn from a packet reflected
2413 * on a bond and blackhole packets before the learning table is
2414 * updated to reflect the correct port. */
2417 out_port = FLOOD_PORT;
2420 /* Don't send packets out their input ports. */
2421 if (in_port == out_port) {
2427 compose_actions(br, flow, vlan, in_port, out_port, tags, actions,
2434 /* Careful: 'opp' is in host byte order and opp->port_no is an OFP port
2437 bridge_port_changed_ofhook_cb(enum ofp_port_reason reason,
2438 const struct ofp_phy_port *opp,
2441 struct bridge *br = br_;
2442 struct iface *iface;
2445 iface = iface_from_dp_ifidx(br, ofp_port_to_odp_port(opp->port_no));
2451 if (reason == OFPPR_DELETE) {
2452 VLOG_WARN("bridge %s: interface %s deleted unexpectedly",
2453 br->name, iface->name);
2454 iface_destroy(iface);
2455 if (!port->n_ifaces) {
2456 VLOG_WARN("bridge %s: port %s has no interfaces, dropping",
2457 br->name, port->name);
2463 if (port->n_ifaces > 1) {
2464 bool up = !(opp->state & OFPPS_LINK_DOWN);
2465 bond_link_status_update(iface, up);
2466 port_update_bond_compat(port);
2472 bridge_normal_ofhook_cb(const flow_t *flow, const struct ofpbuf *packet,
2473 struct odp_actions *actions, tag_type *tags,
2474 uint16_t *nf_output_iface, void *br_)
2476 struct bridge *br = br_;
2478 COVERAGE_INC(bridge_process_flow);
2479 return process_flow(br, flow, packet, actions, tags, nf_output_iface);
2483 bridge_account_flow_ofhook_cb(const flow_t *flow,
2484 const union odp_action *actions,
2485 size_t n_actions, unsigned long long int n_bytes,
2488 struct bridge *br = br_;
2489 const union odp_action *a;
2490 struct port *in_port;
2494 /* Feed information from the active flows back into the learning table
2495 * to ensure that table is always in sync with what is actually flowing
2496 * through the datapath. */
2497 if (is_admissible(br, flow, false, &tags, &vlan, &in_port)) {
2498 update_learning_table(br, flow, vlan, in_port);
2501 if (!br->has_bonded_ports) {
2505 for (a = actions; a < &actions[n_actions]; a++) {
2506 if (a->type == ODPAT_OUTPUT) {
2507 struct port *out_port = port_from_dp_ifidx(br, a->output.port);
2508 if (out_port && out_port->n_ifaces >= 2) {
2509 struct bond_entry *e = lookup_bond_entry(out_port,
2511 e->tx_bytes += n_bytes;
2518 bridge_account_checkpoint_ofhook_cb(void *br_)
2520 struct bridge *br = br_;
2524 if (!br->has_bonded_ports) {
2529 for (i = 0; i < br->n_ports; i++) {
2530 struct port *port = br->ports[i];
2531 if (port->n_ifaces > 1 && now >= port->bond_next_rebalance) {
2532 port->bond_next_rebalance = now + port->bond_rebalance_interval;
2533 bond_rebalance_port(port);
2538 static struct ofhooks bridge_ofhooks = {
2539 bridge_port_changed_ofhook_cb,
2540 bridge_normal_ofhook_cb,
2541 bridge_account_flow_ofhook_cb,
2542 bridge_account_checkpoint_ofhook_cb,
2545 /* Bonding functions. */
2547 /* Statistics for a single interface on a bonded port, used for load-based
2548 * bond rebalancing. */
2549 struct slave_balance {
2550 struct iface *iface; /* The interface. */
2551 uint64_t tx_bytes; /* Sum of hashes[*]->tx_bytes. */
2553 /* All the "bond_entry"s that are assigned to this interface, in order of
2554 * increasing tx_bytes. */
2555 struct bond_entry **hashes;
2559 /* Sorts pointers to pointers to bond_entries in ascending order by the
2560 * interface to which they are assigned, and within a single interface in
2561 * ascending order of bytes transmitted. */
2563 compare_bond_entries(const void *a_, const void *b_)
2565 const struct bond_entry *const *ap = a_;
2566 const struct bond_entry *const *bp = b_;
2567 const struct bond_entry *a = *ap;
2568 const struct bond_entry *b = *bp;
2569 if (a->iface_idx != b->iface_idx) {
2570 return a->iface_idx > b->iface_idx ? 1 : -1;
2571 } else if (a->tx_bytes != b->tx_bytes) {
2572 return a->tx_bytes > b->tx_bytes ? 1 : -1;
2578 /* Sorts slave_balances so that enabled ports come first, and otherwise in
2579 * *descending* order by number of bytes transmitted. */
2581 compare_slave_balance(const void *a_, const void *b_)
2583 const struct slave_balance *a = a_;
2584 const struct slave_balance *b = b_;
2585 if (a->iface->enabled != b->iface->enabled) {
2586 return a->iface->enabled ? -1 : 1;
2587 } else if (a->tx_bytes != b->tx_bytes) {
2588 return a->tx_bytes > b->tx_bytes ? -1 : 1;
2595 swap_bals(struct slave_balance *a, struct slave_balance *b)
2597 struct slave_balance tmp = *a;
2602 /* Restores the 'n_bals' slave_balance structures in 'bals' to sorted order
2603 * given that 'p' (and only 'p') might be in the wrong location.
2605 * This function invalidates 'p', since it might now be in a different memory
2608 resort_bals(struct slave_balance *p,
2609 struct slave_balance bals[], size_t n_bals)
2612 for (; p > bals && p->tx_bytes > p[-1].tx_bytes; p--) {
2613 swap_bals(p, p - 1);
2615 for (; p < &bals[n_bals - 1] && p->tx_bytes < p[1].tx_bytes; p++) {
2616 swap_bals(p, p + 1);
2622 log_bals(const struct slave_balance *bals, size_t n_bals, struct port *port)
2624 if (VLOG_IS_DBG_ENABLED()) {
2625 struct ds ds = DS_EMPTY_INITIALIZER;
2626 const struct slave_balance *b;
2628 for (b = bals; b < bals + n_bals; b++) {
2632 ds_put_char(&ds, ',');
2634 ds_put_format(&ds, " %s %"PRIu64"kB",
2635 b->iface->name, b->tx_bytes / 1024);
2637 if (!b->iface->enabled) {
2638 ds_put_cstr(&ds, " (disabled)");
2640 if (b->n_hashes > 0) {
2641 ds_put_cstr(&ds, " (");
2642 for (i = 0; i < b->n_hashes; i++) {
2643 const struct bond_entry *e = b->hashes[i];
2645 ds_put_cstr(&ds, " + ");
2647 ds_put_format(&ds, "h%td: %"PRIu64"kB",
2648 e - port->bond_hash, e->tx_bytes / 1024);
2650 ds_put_cstr(&ds, ")");
2653 VLOG_DBG("bond %s:%s", port->name, ds_cstr(&ds));
2658 /* Shifts 'hash' from 'from' to 'to' within 'port'. */
2660 bond_shift_load(struct slave_balance *from, struct slave_balance *to,
2663 struct bond_entry *hash = from->hashes[hash_idx];
2664 struct port *port = from->iface->port;
2665 uint64_t delta = hash->tx_bytes;
2667 VLOG_INFO("bond %s: shift %"PRIu64"kB of load (with hash %td) "
2668 "from %s to %s (now carrying %"PRIu64"kB and "
2669 "%"PRIu64"kB load, respectively)",
2670 port->name, delta / 1024, hash - port->bond_hash,
2671 from->iface->name, to->iface->name,
2672 (from->tx_bytes - delta) / 1024,
2673 (to->tx_bytes + delta) / 1024);
2675 /* Delete element from from->hashes.
2677 * We don't bother to add the element to to->hashes because not only would
2678 * it require more work, the only purpose it would be to allow that hash to
2679 * be migrated to another slave in this rebalancing run, and there is no
2680 * point in doing that. */
2681 if (hash_idx == 0) {
2684 memmove(from->hashes + hash_idx, from->hashes + hash_idx + 1,
2685 (from->n_hashes - (hash_idx + 1)) * sizeof *from->hashes);
2689 /* Shift load away from 'from' to 'to'. */
2690 from->tx_bytes -= delta;
2691 to->tx_bytes += delta;
2693 /* Arrange for flows to be revalidated. */
2694 ofproto_revalidate(port->bridge->ofproto, hash->iface_tag);
2695 hash->iface_idx = to->iface->port_ifidx;
2696 hash->iface_tag = tag_create_random();
2700 bond_rebalance_port(struct port *port)
2702 struct slave_balance bals[DP_MAX_PORTS];
2704 struct bond_entry *hashes[BOND_MASK + 1];
2705 struct slave_balance *b, *from, *to;
2706 struct bond_entry *e;
2709 /* Sets up 'bals' to describe each of the port's interfaces, sorted in
2710 * descending order of tx_bytes, so that bals[0] represents the most
2711 * heavily loaded slave and bals[n_bals - 1] represents the least heavily
2714 * The code is a bit tricky: to avoid dynamically allocating a 'hashes'
2715 * array for each slave_balance structure, we sort our local array of
2716 * hashes in order by slave, so that all of the hashes for a given slave
2717 * become contiguous in memory, and then we point each 'hashes' members of
2718 * a slave_balance structure to the start of a contiguous group. */
2719 n_bals = port->n_ifaces;
2720 for (b = bals; b < &bals[n_bals]; b++) {
2721 b->iface = port->ifaces[b - bals];
2726 for (i = 0; i <= BOND_MASK; i++) {
2727 hashes[i] = &port->bond_hash[i];
2729 qsort(hashes, BOND_MASK + 1, sizeof *hashes, compare_bond_entries);
2730 for (i = 0; i <= BOND_MASK; i++) {
2732 if (e->iface_idx >= 0 && e->iface_idx < port->n_ifaces) {
2733 b = &bals[e->iface_idx];
2734 b->tx_bytes += e->tx_bytes;
2736 b->hashes = &hashes[i];
2741 qsort(bals, n_bals, sizeof *bals, compare_slave_balance);
2742 log_bals(bals, n_bals, port);
2744 /* Discard slaves that aren't enabled (which were sorted to the back of the
2745 * array earlier). */
2746 while (!bals[n_bals - 1].iface->enabled) {
2753 /* Shift load from the most-loaded slaves to the least-loaded slaves. */
2754 to = &bals[n_bals - 1];
2755 for (from = bals; from < to; ) {
2756 uint64_t overload = from->tx_bytes - to->tx_bytes;
2757 if (overload < to->tx_bytes >> 5 || overload < 100000) {
2758 /* The extra load on 'from' (and all less-loaded slaves), compared
2759 * to that of 'to' (the least-loaded slave), is less than ~3%, or
2760 * it is less than ~1Mbps. No point in rebalancing. */
2762 } else if (from->n_hashes == 1) {
2763 /* 'from' only carries a single MAC hash, so we can't shift any
2764 * load away from it, even though we want to. */
2767 /* 'from' is carrying significantly more load than 'to', and that
2768 * load is split across at least two different hashes. Pick a hash
2769 * to migrate to 'to' (the least-loaded slave), given that doing so
2770 * must decrease the ratio of the load on the two slaves by at
2773 * The sort order we use means that we prefer to shift away the
2774 * smallest hashes instead of the biggest ones. There is little
2775 * reason behind this decision; we could use the opposite sort
2776 * order to shift away big hashes ahead of small ones. */
2780 for (i = 0; i < from->n_hashes; i++) {
2781 double old_ratio, new_ratio;
2782 uint64_t delta = from->hashes[i]->tx_bytes;
2784 if (delta == 0 || from->tx_bytes - delta == 0) {
2785 /* Pointless move. */
2789 order_swapped = from->tx_bytes - delta < to->tx_bytes + delta;
2791 if (to->tx_bytes == 0) {
2792 /* Nothing on the new slave, move it. */
2796 old_ratio = (double)from->tx_bytes / to->tx_bytes;
2797 new_ratio = (double)(from->tx_bytes - delta) /
2798 (to->tx_bytes + delta);
2800 if (new_ratio == 0) {
2801 /* Should already be covered but check to prevent division
2806 if (new_ratio < 1) {
2807 new_ratio = 1 / new_ratio;
2810 if (old_ratio - new_ratio > 0.1) {
2811 /* Would decrease the ratio, move it. */
2815 if (i < from->n_hashes) {
2816 bond_shift_load(from, to, i);
2817 port->bond_compat_is_stale = true;
2819 /* If the result of the migration changed the relative order of
2820 * 'from' and 'to' swap them back to maintain invariants. */
2821 if (order_swapped) {
2822 swap_bals(from, to);
2825 /* Re-sort 'bals'. Note that this may make 'from' and 'to'
2826 * point to different slave_balance structures. It is only
2827 * valid to do these two operations in a row at all because we
2828 * know that 'from' will not move past 'to' and vice versa. */
2829 resort_bals(from, bals, n_bals);
2830 resort_bals(to, bals, n_bals);
2837 /* Implement exponentially weighted moving average. A weight of 1/2 causes
2838 * historical data to decay to <1% in 7 rebalancing runs. */
2839 for (e = &port->bond_hash[0]; e <= &port->bond_hash[BOND_MASK]; e++) {
2845 bond_send_learning_packets(struct port *port)
2847 struct bridge *br = port->bridge;
2848 struct mac_entry *e;
2849 struct ofpbuf packet;
2850 int error, n_packets, n_errors;
2852 if (!port->n_ifaces || port->active_iface < 0) {
2856 ofpbuf_init(&packet, 128);
2857 error = n_packets = n_errors = 0;
2858 LIST_FOR_EACH (e, struct mac_entry, lru_node, &br->ml->lrus) {
2859 union ofp_action actions[2], *a;
2865 if (e->port == port->port_idx
2866 || !choose_output_iface(port, e->mac, &dp_ifidx, &tags)) {
2870 /* Compose actions. */
2871 memset(actions, 0, sizeof actions);
2874 a->vlan_vid.type = htons(OFPAT_SET_VLAN_VID);
2875 a->vlan_vid.len = htons(sizeof *a);
2876 a->vlan_vid.vlan_vid = htons(e->vlan);
2879 a->output.type = htons(OFPAT_OUTPUT);
2880 a->output.len = htons(sizeof *a);
2881 a->output.port = htons(odp_port_to_ofp_port(dp_ifidx));
2886 compose_benign_packet(&packet, "Open vSwitch Bond Failover", 0xf177,
2888 flow_extract(&packet, 0, ODPP_NONE, &flow);
2889 retval = ofproto_send_packet(br->ofproto, &flow, actions, a - actions,
2896 ofpbuf_uninit(&packet);
2899 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2900 VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
2901 "packets, last error was: %s",
2902 port->name, n_errors, n_packets, strerror(error));
2904 VLOG_DBG("bond %s: sent %d gratuitous learning packets",
2905 port->name, n_packets);
2909 /* Bonding unixctl user interface functions. */
2912 bond_unixctl_list(struct unixctl_conn *conn,
2913 const char *args OVS_UNUSED, void *aux OVS_UNUSED)
2915 struct ds ds = DS_EMPTY_INITIALIZER;
2916 const struct bridge *br;
2918 ds_put_cstr(&ds, "bridge\tbond\tslaves\n");
2920 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
2923 for (i = 0; i < br->n_ports; i++) {
2924 const struct port *port = br->ports[i];
2925 if (port->n_ifaces > 1) {
2928 ds_put_format(&ds, "%s\t%s\t", br->name, port->name);
2929 for (j = 0; j < port->n_ifaces; j++) {
2930 const struct iface *iface = port->ifaces[j];
2932 ds_put_cstr(&ds, ", ");
2934 ds_put_cstr(&ds, iface->name);
2936 ds_put_char(&ds, '\n');
2940 unixctl_command_reply(conn, 200, ds_cstr(&ds));
2944 static struct port *
2945 bond_find(const char *name)
2947 const struct bridge *br;
2949 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
2952 for (i = 0; i < br->n_ports; i++) {
2953 struct port *port = br->ports[i];
2954 if (!strcmp(port->name, name) && port->n_ifaces > 1) {
2963 bond_unixctl_show(struct unixctl_conn *conn,
2964 const char *args, void *aux OVS_UNUSED)
2966 struct ds ds = DS_EMPTY_INITIALIZER;
2967 const struct port *port;
2970 port = bond_find(args);
2972 unixctl_command_reply(conn, 501, "no such bond");
2976 ds_put_format(&ds, "updelay: %d ms\n", port->updelay);
2977 ds_put_format(&ds, "downdelay: %d ms\n", port->downdelay);
2978 ds_put_format(&ds, "next rebalance: %lld ms\n",
2979 port->bond_next_rebalance - time_msec());
2980 for (j = 0; j < port->n_ifaces; j++) {
2981 const struct iface *iface = port->ifaces[j];
2982 struct bond_entry *be;
2985 ds_put_format(&ds, "slave %s: %s\n",
2986 iface->name, iface->enabled ? "enabled" : "disabled");
2987 if (j == port->active_iface) {
2988 ds_put_cstr(&ds, "\tactive slave\n");
2990 if (iface->delay_expires != LLONG_MAX) {
2991 ds_put_format(&ds, "\t%s expires in %lld ms\n",
2992 iface->enabled ? "downdelay" : "updelay",
2993 iface->delay_expires - time_msec());
2997 for (be = port->bond_hash; be <= &port->bond_hash[BOND_MASK]; be++) {
2998 int hash = be - port->bond_hash;
2999 struct mac_entry *me;
3001 if (be->iface_idx != j) {
3005 ds_put_format(&ds, "\thash %d: %"PRIu64" kB load\n",
3006 hash, be->tx_bytes / 1024);
3009 LIST_FOR_EACH (me, struct mac_entry, lru_node,
3010 &port->bridge->ml->lrus) {
3013 if (bond_hash(me->mac) == hash
3014 && me->port != port->port_idx
3015 && choose_output_iface(port, me->mac, &dp_ifidx, &tags)
3016 && dp_ifidx == iface->dp_ifidx)
3018 ds_put_format(&ds, "\t\t"ETH_ADDR_FMT"\n",
3019 ETH_ADDR_ARGS(me->mac));
3024 unixctl_command_reply(conn, 200, ds_cstr(&ds));
3029 bond_unixctl_migrate(struct unixctl_conn *conn, const char *args_,
3030 void *aux OVS_UNUSED)
3032 char *args = (char *) args_;
3033 char *save_ptr = NULL;
3034 char *bond_s, *hash_s, *slave_s;
3035 uint8_t mac[ETH_ADDR_LEN];
3037 struct iface *iface;
3038 struct bond_entry *entry;
3041 bond_s = strtok_r(args, " ", &save_ptr);
3042 hash_s = strtok_r(NULL, " ", &save_ptr);
3043 slave_s = strtok_r(NULL, " ", &save_ptr);
3045 unixctl_command_reply(conn, 501,
3046 "usage: bond/migrate BOND HASH SLAVE");
3050 port = bond_find(bond_s);
3052 unixctl_command_reply(conn, 501, "no such bond");
3056 if (sscanf(hash_s, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
3057 == ETH_ADDR_SCAN_COUNT) {
3058 hash = bond_hash(mac);
3059 } else if (strspn(hash_s, "0123456789") == strlen(hash_s)) {
3060 hash = atoi(hash_s) & BOND_MASK;
3062 unixctl_command_reply(conn, 501, "bad hash");
3066 iface = port_lookup_iface(port, slave_s);
3068 unixctl_command_reply(conn, 501, "no such slave");
3072 if (!iface->enabled) {
3073 unixctl_command_reply(conn, 501, "cannot migrate to disabled slave");
3077 entry = &port->bond_hash[hash];
3078 ofproto_revalidate(port->bridge->ofproto, entry->iface_tag);
3079 entry->iface_idx = iface->port_ifidx;
3080 entry->iface_tag = tag_create_random();
3081 port->bond_compat_is_stale = true;
3082 unixctl_command_reply(conn, 200, "migrated");
3086 bond_unixctl_set_active_slave(struct unixctl_conn *conn, const char *args_,
3087 void *aux OVS_UNUSED)
3089 char *args = (char *) args_;
3090 char *save_ptr = NULL;
3091 char *bond_s, *slave_s;
3093 struct iface *iface;
3095 bond_s = strtok_r(args, " ", &save_ptr);
3096 slave_s = strtok_r(NULL, " ", &save_ptr);
3098 unixctl_command_reply(conn, 501,
3099 "usage: bond/set-active-slave BOND SLAVE");
3103 port = bond_find(bond_s);
3105 unixctl_command_reply(conn, 501, "no such bond");
3109 iface = port_lookup_iface(port, slave_s);
3111 unixctl_command_reply(conn, 501, "no such slave");
3115 if (!iface->enabled) {
3116 unixctl_command_reply(conn, 501, "cannot make disabled slave active");
3120 if (port->active_iface != iface->port_ifidx) {
3121 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
3122 port->active_iface = iface->port_ifidx;
3123 port->active_iface_tag = tag_create_random();
3124 VLOG_INFO("port %s: active interface is now %s",
3125 port->name, iface->name);
3126 bond_send_learning_packets(port);
3127 unixctl_command_reply(conn, 200, "done");
3129 unixctl_command_reply(conn, 200, "no change");
3134 enable_slave(struct unixctl_conn *conn, const char *args_, bool enable)
3136 char *args = (char *) args_;
3137 char *save_ptr = NULL;
3138 char *bond_s, *slave_s;
3140 struct iface *iface;
3142 bond_s = strtok_r(args, " ", &save_ptr);
3143 slave_s = strtok_r(NULL, " ", &save_ptr);
3145 unixctl_command_reply(conn, 501,
3146 "usage: bond/enable/disable-slave BOND SLAVE");
3150 port = bond_find(bond_s);
3152 unixctl_command_reply(conn, 501, "no such bond");
3156 iface = port_lookup_iface(port, slave_s);
3158 unixctl_command_reply(conn, 501, "no such slave");
3162 bond_enable_slave(iface, enable);
3163 unixctl_command_reply(conn, 501, enable ? "enabled" : "disabled");
3167 bond_unixctl_enable_slave(struct unixctl_conn *conn, const char *args,
3168 void *aux OVS_UNUSED)
3170 enable_slave(conn, args, true);
3174 bond_unixctl_disable_slave(struct unixctl_conn *conn, const char *args,
3175 void *aux OVS_UNUSED)
3177 enable_slave(conn, args, false);
3181 bond_unixctl_hash(struct unixctl_conn *conn, const char *args,
3182 void *aux OVS_UNUSED)
3184 uint8_t mac[ETH_ADDR_LEN];
3188 if (sscanf(args, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
3189 == ETH_ADDR_SCAN_COUNT) {
3190 hash = bond_hash(mac);
3192 hash_cstr = xasprintf("%u", hash);
3193 unixctl_command_reply(conn, 200, hash_cstr);
3196 unixctl_command_reply(conn, 501, "invalid mac");
3203 unixctl_command_register("bond/list", bond_unixctl_list, NULL);
3204 unixctl_command_register("bond/show", bond_unixctl_show, NULL);
3205 unixctl_command_register("bond/migrate", bond_unixctl_migrate, NULL);
3206 unixctl_command_register("bond/set-active-slave",
3207 bond_unixctl_set_active_slave, NULL);
3208 unixctl_command_register("bond/enable-slave", bond_unixctl_enable_slave,
3210 unixctl_command_register("bond/disable-slave", bond_unixctl_disable_slave,
3212 unixctl_command_register("bond/hash", bond_unixctl_hash, NULL);
3215 /* Port functions. */
3217 static struct port *
3218 port_create(struct bridge *br, const char *name)
3222 port = xzalloc(sizeof *port);
3224 port->port_idx = br->n_ports;
3226 port->trunks = NULL;
3227 port->name = xstrdup(name);
3228 port->active_iface = -1;
3230 if (br->n_ports >= br->allocated_ports) {
3231 br->ports = x2nrealloc(br->ports, &br->allocated_ports,
3234 br->ports[br->n_ports++] = port;
3235 shash_add_assert(&br->port_by_name, port->name, port);
3237 VLOG_INFO("created port %s on bridge %s", port->name, br->name);
3244 get_port_other_config(const struct ovsrec_port *port, const char *key,
3245 const char *default_value)
3247 const char *value = get_ovsrec_key_value(key,
3248 port->key_other_config,
3249 port->value_other_config,
3250 port->n_other_config);
3251 return value ? value : default_value;
3255 port_del_ifaces(struct port *port, const struct ovsrec_port *cfg)
3257 struct shash new_ifaces;
3260 /* Collect list of new interfaces. */
3261 shash_init(&new_ifaces);
3262 for (i = 0; i < cfg->n_interfaces; i++) {
3263 const char *name = cfg->interfaces[i]->name;
3264 shash_add_once(&new_ifaces, name, NULL);
3267 /* Get rid of deleted interfaces. */
3268 for (i = 0; i < port->n_ifaces; ) {
3269 if (!shash_find(&new_ifaces, cfg->interfaces[i]->name)) {
3270 iface_destroy(port->ifaces[i]);
3276 shash_destroy(&new_ifaces);
3280 port_reconfigure(struct port *port, const struct ovsrec_port *cfg)
3282 struct shash new_ifaces;
3283 long long int next_rebalance;
3284 unsigned long *trunks;
3290 /* Update settings. */
3291 port->updelay = cfg->bond_updelay;
3292 if (port->updelay < 0) {
3295 port->updelay = cfg->bond_downdelay;
3296 if (port->downdelay < 0) {
3297 port->downdelay = 0;
3299 port->bond_rebalance_interval = atoi(
3300 get_port_other_config(cfg, "bond-rebalance-interval", "10000"));
3301 if (port->bond_rebalance_interval < 1000) {
3302 port->bond_rebalance_interval = 1000;
3304 next_rebalance = time_msec() + port->bond_rebalance_interval;
3305 if (port->bond_next_rebalance > next_rebalance) {
3306 port->bond_next_rebalance = next_rebalance;
3309 /* Add new interfaces and update 'cfg' member of existing ones. */
3310 shash_init(&new_ifaces);
3311 for (i = 0; i < cfg->n_interfaces; i++) {
3312 const struct ovsrec_interface *if_cfg = cfg->interfaces[i];
3313 struct iface *iface;
3315 if (!shash_add_once(&new_ifaces, if_cfg->name, NULL)) {
3316 VLOG_WARN("port %s: %s specified twice as port interface",
3317 port->name, if_cfg->name);
3321 iface = iface_lookup(port->bridge, if_cfg->name);
3323 if (iface->port != port) {
3324 VLOG_ERR("bridge %s: %s interface is on multiple ports, "
3326 port->bridge->name, if_cfg->name, iface->port->name);
3329 iface->cfg = if_cfg;
3331 iface_create(port, if_cfg);
3334 shash_destroy(&new_ifaces);
3339 if (port->n_ifaces < 2) {
3341 if (vlan >= 0 && vlan <= 4095) {
3342 VLOG_DBG("port %s: assigning VLAN tag %d", port->name, vlan);
3347 /* It's possible that bonded, VLAN-tagged ports make sense. Maybe
3348 * they even work as-is. But they have not been tested. */
3349 VLOG_WARN("port %s: VLAN tags not supported on bonded ports",
3353 if (port->vlan != vlan) {
3355 bridge_flush(port->bridge);
3358 /* Get trunked VLANs. */
3360 if (vlan < 0 && cfg->n_trunks) {
3364 trunks = bitmap_allocate(4096);
3366 for (i = 0; i < cfg->n_trunks; i++) {
3367 int trunk = cfg->trunks[i];
3369 bitmap_set1(trunks, trunk);
3375 VLOG_ERR("port %s: invalid values for %zu trunk VLANs",
3376 port->name, cfg->n_trunks);
3378 if (n_errors == cfg->n_trunks) {
3379 VLOG_ERR("port %s: no valid trunks, trunking all VLANs",
3381 bitmap_free(trunks);
3384 } else if (vlan >= 0 && cfg->n_trunks) {
3385 VLOG_ERR("port %s: ignoring trunks in favor of implicit vlan",
3389 ? port->trunks != NULL
3390 : port->trunks == NULL || !bitmap_equal(trunks, port->trunks, 4096)) {
3391 bridge_flush(port->bridge);
3393 bitmap_free(port->trunks);
3394 port->trunks = trunks;
3398 port_destroy(struct port *port)
3401 struct bridge *br = port->bridge;
3405 proc_net_compat_update_vlan(port->name, NULL, 0);
3406 proc_net_compat_update_bond(port->name, NULL);
3408 for (i = 0; i < MAX_MIRRORS; i++) {
3409 struct mirror *m = br->mirrors[i];
3410 if (m && m->out_port == port) {
3415 while (port->n_ifaces > 0) {
3416 iface_destroy(port->ifaces[port->n_ifaces - 1]);
3419 shash_find_and_delete_assert(&br->port_by_name, port->name);
3421 del = br->ports[port->port_idx] = br->ports[--br->n_ports];
3422 del->port_idx = port->port_idx;
3425 bitmap_free(port->trunks);
3432 static struct port *
3433 port_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
3435 struct iface *iface = iface_from_dp_ifidx(br, dp_ifidx);
3436 return iface ? iface->port : NULL;
3439 static struct port *
3440 port_lookup(const struct bridge *br, const char *name)
3442 return shash_find_data(&br->port_by_name, name);
3445 static struct iface *
3446 port_lookup_iface(const struct port *port, const char *name)
3448 struct iface *iface = iface_lookup(port->bridge, name);
3449 return iface && iface->port == port ? iface : NULL;
3453 port_update_bonding(struct port *port)
3455 if (port->n_ifaces < 2) {
3456 /* Not a bonded port. */
3457 if (port->bond_hash) {
3458 free(port->bond_hash);
3459 port->bond_hash = NULL;
3460 port->bond_compat_is_stale = true;
3461 port->bond_fake_iface = false;
3464 if (!port->bond_hash) {
3467 port->bond_hash = xcalloc(BOND_MASK + 1, sizeof *port->bond_hash);
3468 for (i = 0; i <= BOND_MASK; i++) {
3469 struct bond_entry *e = &port->bond_hash[i];
3473 port->no_ifaces_tag = tag_create_random();
3474 bond_choose_active_iface(port);
3475 port->bond_next_rebalance
3476 = time_msec() + port->bond_rebalance_interval;
3478 if (port->cfg->bond_fake_iface) {
3479 port->bond_next_fake_iface_update = time_msec();
3482 port->bond_compat_is_stale = true;
3483 port->bond_fake_iface = port->cfg->bond_fake_iface;
3488 port_update_bond_compat(struct port *port)
3490 struct compat_bond_hash compat_hashes[BOND_MASK + 1];
3491 struct compat_bond bond;
3494 if (port->n_ifaces < 2) {
3495 proc_net_compat_update_bond(port->name, NULL);
3500 bond.updelay = port->updelay;
3501 bond.downdelay = port->downdelay;
3504 bond.hashes = compat_hashes;
3505 if (port->bond_hash) {
3506 const struct bond_entry *e;
3507 for (e = port->bond_hash; e <= &port->bond_hash[BOND_MASK]; e++) {
3508 if (e->iface_idx >= 0 && e->iface_idx < port->n_ifaces) {
3509 struct compat_bond_hash *cbh = &bond.hashes[bond.n_hashes++];
3510 cbh->hash = e - port->bond_hash;
3511 cbh->netdev_name = port->ifaces[e->iface_idx]->name;
3516 bond.n_slaves = port->n_ifaces;
3517 bond.slaves = xmalloc(port->n_ifaces * sizeof *bond.slaves);
3518 for (i = 0; i < port->n_ifaces; i++) {
3519 struct iface *iface = port->ifaces[i];
3520 struct compat_bond_slave *slave = &bond.slaves[i];
3521 slave->name = iface->name;
3523 /* We need to make the same determination as the Linux bonding
3524 * code to determine whether a slave should be consider "up".
3525 * The Linux function bond_miimon_inspect() supports four
3526 * BOND_LINK_* states:
3528 * - BOND_LINK_UP: carrier detected, updelay has passed.
3529 * - BOND_LINK_FAIL: carrier lost, downdelay in progress.
3530 * - BOND_LINK_DOWN: carrier lost, downdelay has passed.
3531 * - BOND_LINK_BACK: carrier detected, updelay in progress.
3533 * The function bond_info_show_slave() only considers BOND_LINK_UP
3534 * to be "up" and anything else to be "down".
3536 slave->up = iface->enabled && iface->delay_expires == LLONG_MAX;
3540 netdev_get_etheraddr(iface->netdev, slave->mac);
3543 if (port->bond_fake_iface) {
3544 struct netdev *bond_netdev;
3546 if (!netdev_open_default(port->name, &bond_netdev)) {
3548 netdev_turn_flags_on(bond_netdev, NETDEV_UP, true);
3550 netdev_turn_flags_off(bond_netdev, NETDEV_UP, true);
3552 netdev_close(bond_netdev);
3556 proc_net_compat_update_bond(port->name, &bond);
3561 port_update_vlan_compat(struct port *port)
3563 struct bridge *br = port->bridge;
3564 char *vlandev_name = NULL;
3566 if (port->vlan > 0) {
3567 /* Figure out the name that the VLAN device should actually have, if it
3568 * existed. This takes some work because the VLAN device would not
3569 * have port->name in its name; rather, it would have the trunk port's
3570 * name, and 'port' would be attached to a bridge that also had the
3571 * VLAN device one of its ports. So we need to find a trunk port that
3572 * includes port->vlan.
3574 * There might be more than one candidate. This doesn't happen on
3575 * XenServer, so if it happens we just pick the first choice in
3576 * alphabetical order instead of creating multiple VLAN devices. */
3578 for (i = 0; i < br->n_ports; i++) {
3579 struct port *p = br->ports[i];
3580 if (port_trunks_vlan(p, port->vlan)
3582 && (!vlandev_name || strcmp(p->name, vlandev_name) <= 0))
3584 uint8_t ea[ETH_ADDR_LEN];
3585 netdev_get_etheraddr(p->ifaces[0]->netdev, ea);
3586 if (!eth_addr_is_multicast(ea) &&
3587 !eth_addr_is_reserved(ea) &&
3588 !eth_addr_is_zero(ea)) {
3589 vlandev_name = p->name;
3594 proc_net_compat_update_vlan(port->name, vlandev_name, port->vlan);
3597 /* Interface functions. */
3599 static struct iface *
3600 iface_create(struct port *port, const struct ovsrec_interface *if_cfg)
3602 struct bridge *br = port->bridge;
3603 struct iface *iface;
3604 char *name = if_cfg->name;
3607 iface = xzalloc(sizeof *iface);
3609 iface->port_ifidx = port->n_ifaces;
3610 iface->name = xstrdup(name);
3611 iface->dp_ifidx = -1;
3612 iface->tag = tag_create_random();
3613 iface->delay_expires = LLONG_MAX;
3614 iface->netdev = NULL;
3615 iface->cfg = if_cfg;
3617 shash_add_assert(&br->iface_by_name, iface->name, iface);
3619 /* Attempt to create the network interface in case it doesn't exist yet. */
3620 if (!iface_is_internal(br, iface->name)) {
3621 error = set_up_iface(if_cfg, iface, true);
3623 VLOG_WARN("could not create iface %s: %s", iface->name,
3626 shash_find_and_delete_assert(&br->iface_by_name, iface->name);
3633 if (port->n_ifaces >= port->allocated_ifaces) {
3634 port->ifaces = x2nrealloc(port->ifaces, &port->allocated_ifaces,
3635 sizeof *port->ifaces);
3637 port->ifaces[port->n_ifaces++] = iface;
3638 if (port->n_ifaces > 1) {
3639 br->has_bonded_ports = true;
3642 VLOG_DBG("attached network device %s to port %s", iface->name, port->name);
3650 iface_destroy(struct iface *iface)
3653 struct port *port = iface->port;
3654 struct bridge *br = port->bridge;
3655 bool del_active = port->active_iface == iface->port_ifidx;
3658 shash_find_and_delete_assert(&br->iface_by_name, iface->name);
3660 if (iface->dp_ifidx >= 0) {
3661 port_array_set(&br->ifaces, iface->dp_ifidx, NULL);
3664 del = port->ifaces[iface->port_ifidx] = port->ifaces[--port->n_ifaces];
3665 del->port_ifidx = iface->port_ifidx;
3667 netdev_close(iface->netdev);
3670 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
3671 bond_choose_active_iface(port);
3672 bond_send_learning_packets(port);
3678 bridge_flush(port->bridge);
3682 static struct iface *
3683 iface_lookup(const struct bridge *br, const char *name)
3685 return shash_find_data(&br->iface_by_name, name);
3688 static struct iface *
3689 iface_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
3691 return port_array_get(&br->ifaces, dp_ifidx);
3694 /* Returns true if 'iface' is the name of an "internal" interface on bridge
3695 * 'br', that is, an interface that is entirely simulated within the datapath.
3696 * The local port (ODPP_LOCAL) is always an internal interface. Other local
3697 * interfaces are created by setting "iface.<iface>.internal = true".
3699 * In addition, we have a kluge-y feature that creates an internal port with
3700 * the name of a bonded port if "bonding.<bondname>.fake-iface = true" is set.
3701 * This feature needs to go away in the long term. Until then, this is one
3702 * reason why this function takes a name instead of a struct iface: the fake
3703 * interfaces created this way do not have a struct iface. */
3705 iface_is_internal(const struct bridge *br, const char *if_name)
3707 struct iface *iface;
3710 if (!strcmp(if_name, br->name)) {
3714 iface = iface_lookup(br, if_name);
3715 if (iface && !strcmp(iface->cfg->type, "internal")) {
3719 port = port_lookup(br, if_name);
3720 if (port && port->n_ifaces > 1 && port->cfg->bond_fake_iface) {
3726 /* Set Ethernet address of 'iface', if one is specified in the configuration
3729 iface_set_mac(struct iface *iface)
3731 uint8_t ea[ETH_ADDR_LEN];
3733 if (iface->cfg->mac && eth_addr_from_string(iface->cfg->mac, ea)) {
3734 if (eth_addr_is_multicast(ea)) {
3735 VLOG_ERR("interface %s: cannot set MAC to multicast address",
3737 } else if (iface->dp_ifidx == ODPP_LOCAL) {
3738 VLOG_ERR("ignoring iface.%s.mac; use bridge.%s.mac instead",
3739 iface->name, iface->name);
3741 int error = netdev_set_etheraddr(iface->netdev, ea);
3743 VLOG_ERR("interface %s: setting MAC failed (%s)",
3744 iface->name, strerror(error));
3750 /* Port mirroring. */
3753 mirror_reconfigure(struct bridge *br)
3755 struct shash old_mirrors, new_mirrors;
3756 struct shash_node *node;
3757 unsigned long *rspan_vlans;
3760 /* Collect old mirrors. */
3761 shash_init(&old_mirrors);
3762 for (i = 0; i < MAX_MIRRORS; i++) {
3763 if (br->mirrors[i]) {
3764 shash_add(&old_mirrors, br->mirrors[i]->name, br->mirrors[i]);
3768 /* Collect new mirrors. */
3769 shash_init(&new_mirrors);
3770 for (i = 0; i < br->cfg->n_mirrors; i++) {
3771 struct ovsrec_mirror *cfg = br->cfg->mirrors[i];
3772 if (!shash_add_once(&new_mirrors, cfg->name, cfg)) {
3773 VLOG_WARN("bridge %s: %s specified twice as mirror",
3774 br->name, cfg->name);
3778 /* Get rid of deleted mirrors and add new mirrors. */
3779 SHASH_FOR_EACH (node, &old_mirrors) {
3780 if (!shash_find(&new_mirrors, node->name)) {
3781 mirror_destroy(node->data);
3784 SHASH_FOR_EACH (node, &new_mirrors) {
3785 struct mirror *mirror = shash_find_data(&old_mirrors, node->name);
3787 mirror = mirror_create(br, node->name);
3792 mirror_reconfigure_one(mirror, node->data);
3794 shash_destroy(&old_mirrors);
3795 shash_destroy(&new_mirrors);
3797 /* Update port reserved status. */
3798 for (i = 0; i < br->n_ports; i++) {
3799 br->ports[i]->is_mirror_output_port = false;
3801 for (i = 0; i < MAX_MIRRORS; i++) {
3802 struct mirror *m = br->mirrors[i];
3803 if (m && m->out_port) {
3804 m->out_port->is_mirror_output_port = true;
3808 /* Update flooded vlans (for RSPAN). */
3810 if (br->cfg->n_flood_vlans) {
3811 rspan_vlans = bitmap_allocate(4096);
3813 for (i = 0; i < br->cfg->n_flood_vlans; i++) {
3814 int64_t vlan = br->cfg->flood_vlans[i];
3815 if (vlan >= 0 && vlan < 4096) {
3816 bitmap_set1(rspan_vlans, vlan);
3817 VLOG_INFO("bridge %s: disabling learning on vlan %"PRId64,
3820 VLOG_ERR("bridge %s: invalid value %"PRId64 "for flood VLAN",
3825 if (mac_learning_set_flood_vlans(br->ml, rspan_vlans)) {
3830 static struct mirror *
3831 mirror_create(struct bridge *br, const char *name)
3836 for (i = 0; ; i++) {
3837 if (i >= MAX_MIRRORS) {
3838 VLOG_WARN("bridge %s: maximum of %d port mirrors reached, "
3839 "cannot create %s", br->name, MAX_MIRRORS, name);
3842 if (!br->mirrors[i]) {
3847 VLOG_INFO("created port mirror %s on bridge %s", name, br->name);
3850 br->mirrors[i] = m = xzalloc(sizeof *m);
3853 m->name = xstrdup(name);
3854 shash_init(&m->src_ports);
3855 shash_init(&m->dst_ports);
3865 mirror_destroy(struct mirror *m)
3868 struct bridge *br = m->bridge;
3871 for (i = 0; i < br->n_ports; i++) {
3872 br->ports[i]->src_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
3873 br->ports[i]->dst_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
3876 shash_destroy(&m->src_ports);
3877 shash_destroy(&m->dst_ports);
3880 m->bridge->mirrors[m->idx] = NULL;
3888 mirror_collect_ports(struct mirror *m, struct ovsrec_port **ports, int n_ports,
3889 struct shash *names)
3893 for (i = 0; i < n_ports; i++) {
3894 const char *name = ports[i]->name;
3895 if (port_lookup(m->bridge, name)) {
3896 shash_add_once(names, name, NULL);
3898 VLOG_WARN("bridge %s: mirror %s cannot match on nonexistent "
3899 "port %s", m->bridge->name, m->name, name);
3905 mirror_collect_vlans(struct mirror *m, const struct ovsrec_mirror *cfg,
3911 *vlans = xmalloc(sizeof **vlans * cfg->n_select_vlan);
3913 for (i = 0; i < cfg->n_select_vlan; i++) {
3914 int64_t vlan = cfg->select_vlan[i];
3915 if (vlan < 0 || vlan > 4095) {
3916 VLOG_WARN("bridge %s: mirror %s selects invalid VLAN %"PRId64,
3917 m->bridge->name, m->name, vlan);
3919 (*vlans)[n_vlans++] = vlan;
3926 vlan_is_mirrored(const struct mirror *m, int vlan)
3930 for (i = 0; i < m->n_vlans; i++) {
3931 if (m->vlans[i] == vlan) {
3939 port_trunks_any_mirrored_vlan(const struct mirror *m, const struct port *p)
3943 for (i = 0; i < m->n_vlans; i++) {
3944 if (port_trunks_vlan(p, m->vlans[i])) {
3952 mirror_reconfigure_one(struct mirror *m, struct ovsrec_mirror *cfg)
3954 struct shash src_ports, dst_ports;
3955 mirror_mask_t mirror_bit;
3956 struct port *out_port;
3962 /* Get output port. */
3963 if (cfg->output_port) {
3964 out_port = port_lookup(m->bridge, cfg->output_port->name);
3966 VLOG_ERR("bridge %s: mirror %s outputs to port not on bridge",
3967 m->bridge->name, m->name);
3973 if (cfg->output_vlan) {
3974 VLOG_ERR("bridge %s: mirror %s specifies both output port and "
3975 "output vlan; ignoring output vlan",
3976 m->bridge->name, m->name);
3978 } else if (cfg->output_vlan) {
3980 out_vlan = *cfg->output_vlan;
3982 VLOG_ERR("bridge %s: mirror %s does not specify output; ignoring",
3983 m->bridge->name, m->name);
3988 shash_init(&src_ports);
3989 shash_init(&dst_ports);
3990 if (cfg->select_all) {
3991 for (i = 0; i < m->bridge->n_ports; i++) {
3992 const char *name = m->bridge->ports[i]->name;
3993 shash_add_once(&src_ports, name, NULL);
3994 shash_add_once(&dst_ports, name, NULL);
3999 /* Get ports, and drop duplicates and ports that don't exist. */
4000 mirror_collect_ports(m, cfg->select_src_port, cfg->n_select_src_port,
4002 mirror_collect_ports(m, cfg->select_dst_port, cfg->n_select_dst_port,
4005 /* Get all the vlans, and drop duplicate and invalid vlans. */
4006 n_vlans = mirror_collect_vlans(m, cfg, &vlans);
4009 /* Update mirror data. */
4010 if (!shash_equal_keys(&m->src_ports, &src_ports)
4011 || !shash_equal_keys(&m->dst_ports, &dst_ports)
4012 || m->n_vlans != n_vlans
4013 || memcmp(m->vlans, vlans, sizeof *vlans * n_vlans)
4014 || m->out_port != out_port
4015 || m->out_vlan != out_vlan) {
4016 bridge_flush(m->bridge);
4018 shash_swap(&m->src_ports, &src_ports);
4019 shash_swap(&m->dst_ports, &dst_ports);
4022 m->n_vlans = n_vlans;
4023 m->out_port = out_port;
4024 m->out_vlan = out_vlan;
4027 mirror_bit = MIRROR_MASK_C(1) << m->idx;
4028 for (i = 0; i < m->bridge->n_ports; i++) {
4029 struct port *port = m->bridge->ports[i];
4031 if (shash_find(&m->src_ports, port->name)
4034 ? port_trunks_any_mirrored_vlan(m, port)
4035 : vlan_is_mirrored(m, port->vlan)))) {
4036 port->src_mirrors |= mirror_bit;
4038 port->src_mirrors &= ~mirror_bit;
4041 if (shash_find(&m->dst_ports, port->name)) {
4042 port->dst_mirrors |= mirror_bit;
4044 port->dst_mirrors &= ~mirror_bit;
4049 shash_destroy(&src_ports);
4050 shash_destroy(&dst_ports);