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"
49 #include "ovsdb-data.h"
51 #include "poll-loop.h"
52 #include "port-array.h"
53 #include "proc-net-compat.h"
57 #include "socket-util.h"
58 #include "stream-ssl.h"
64 #include "vswitchd/vswitch-idl.h"
65 #include "xenserver.h"
68 #include "sflow_api.h"
70 VLOG_DEFINE_THIS_MODULE(bridge)
78 /* These members are always valid. */
79 struct port *port; /* Containing port. */
80 size_t port_ifidx; /* Index within containing port. */
81 char *name; /* Host network device name. */
82 tag_type tag; /* Tag associated with this interface. */
83 long long delay_expires; /* Time after which 'enabled' may change. */
85 /* These members are valid only after bridge_reconfigure() causes them to
87 int dp_ifidx; /* Index within kernel datapath. */
88 struct netdev *netdev; /* Network device. */
89 bool enabled; /* May be chosen for flows? */
90 const struct ovsrec_interface *cfg;
93 #define BOND_MASK 0xff
95 int iface_idx; /* Index of assigned iface, or -1 if none. */
96 uint64_t tx_bytes; /* Count of bytes recently transmitted. */
97 tag_type iface_tag; /* Tag associated with iface_idx. */
100 #define MAX_MIRRORS 32
101 typedef uint32_t mirror_mask_t;
102 #define MIRROR_MASK_C(X) UINT32_C(X)
103 BUILD_ASSERT_DECL(sizeof(mirror_mask_t) * CHAR_BIT >= MAX_MIRRORS);
105 struct bridge *bridge;
108 struct uuid uuid; /* UUID of this "mirror" record in database. */
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. */
128 const struct ovsrec_port *cfg;
131 /* An ordinary bridge port has 1 interface.
132 * A bridge port for bonding has at least 2 interfaces. */
133 struct iface **ifaces;
134 size_t n_ifaces, allocated_ifaces;
137 struct bond_entry *bond_hash; /* An array of (BOND_MASK + 1) elements. */
138 int active_iface; /* Ifidx on which bcasts accepted, or -1. */
139 tag_type active_iface_tag; /* Tag for bcast flows. */
140 tag_type no_ifaces_tag; /* Tag for flows when all ifaces disabled. */
141 int updelay, downdelay; /* Delay before iface goes up/down, in ms. */
142 bool bond_compat_is_stale; /* Need to call port_update_bond_compat()? */
143 bool bond_fake_iface; /* Fake a bond interface for legacy compat? */
144 long long int bond_next_fake_iface_update; /* Time of next update. */
145 int bond_rebalance_interval; /* Interval between rebalances, in ms. */
146 long long int bond_next_rebalance; /* Next rebalancing time. */
148 /* Port mirroring info. */
149 mirror_mask_t src_mirrors; /* Mirrors triggered when packet received. */
150 mirror_mask_t dst_mirrors; /* Mirrors triggered when packet sent. */
151 bool is_mirror_output_port; /* Does port mirroring send frames here? */
154 #define DP_MAX_PORTS 255
156 struct list node; /* Node in global list of bridges. */
157 char *name; /* User-specified arbitrary name. */
158 struct mac_learning *ml; /* MAC learning table. */
159 uint8_t default_ea[ETH_ADDR_LEN]; /* Default MAC. */
160 const struct ovsrec_bridge *cfg;
162 /* OpenFlow switch processing. */
163 struct ofproto *ofproto; /* OpenFlow switch. */
165 /* Kernel datapath information. */
166 struct dpif *dpif; /* Datapath. */
167 struct port_array ifaces; /* Indexed by kernel datapath port number. */
171 size_t n_ports, allocated_ports;
172 struct shash iface_by_name; /* "struct iface"s indexed by name. */
173 struct shash port_by_name; /* "struct port"s indexed by name. */
176 bool has_bonded_ports;
181 /* Port mirroring. */
182 struct mirror *mirrors[MAX_MIRRORS];
185 /* List of all bridges. */
186 static struct list all_bridges = LIST_INITIALIZER(&all_bridges);
188 /* OVSDB IDL used to obtain configuration. */
189 static struct ovsdb_idl *idl;
191 /* Each time this timer expires, the bridge fetches statistics for every
192 * interface and pushes them into the database. */
193 #define IFACE_STATS_INTERVAL (5 * 1000) /* In milliseconds. */
194 static long long int iface_stats_timer = LLONG_MIN;
196 static struct bridge *bridge_create(const struct ovsrec_bridge *br_cfg);
197 static void bridge_destroy(struct bridge *);
198 static struct bridge *bridge_lookup(const char *name);
199 static unixctl_cb_func bridge_unixctl_dump_flows;
200 static unixctl_cb_func bridge_unixctl_reconnect;
201 static int bridge_run_one(struct bridge *);
202 static size_t bridge_get_controllers(const struct bridge *br,
203 struct ovsrec_controller ***controllersp);
204 static void bridge_reconfigure_one(struct bridge *);
205 static void bridge_reconfigure_remotes(struct bridge *,
206 const struct sockaddr_in *managers,
208 static void bridge_get_all_ifaces(const struct bridge *, struct shash *ifaces);
209 static void bridge_fetch_dp_ifaces(struct bridge *);
210 static void bridge_flush(struct bridge *);
211 static void bridge_pick_local_hw_addr(struct bridge *,
212 uint8_t ea[ETH_ADDR_LEN],
213 struct iface **hw_addr_iface);
214 static uint64_t bridge_pick_datapath_id(struct bridge *,
215 const uint8_t bridge_ea[ETH_ADDR_LEN],
216 struct iface *hw_addr_iface);
217 static struct iface *bridge_get_local_iface(struct bridge *);
218 static uint64_t dpid_from_hash(const void *, size_t nbytes);
220 static unixctl_cb_func bridge_unixctl_fdb_show;
222 static void bond_init(void);
223 static void bond_run(struct bridge *);
224 static void bond_wait(struct bridge *);
225 static void bond_rebalance_port(struct port *);
226 static void bond_send_learning_packets(struct port *);
227 static void bond_enable_slave(struct iface *iface, bool enable);
229 static struct port *port_create(struct bridge *, const char *name);
230 static void port_reconfigure(struct port *, const struct ovsrec_port *);
231 static void port_del_ifaces(struct port *, const struct ovsrec_port *);
232 static void port_destroy(struct port *);
233 static struct port *port_lookup(const struct bridge *, const char *name);
234 static struct iface *port_lookup_iface(const struct port *, const char *name);
235 static struct port *port_from_dp_ifidx(const struct bridge *,
237 static void port_update_bond_compat(struct port *);
238 static void port_update_vlan_compat(struct port *);
239 static void port_update_bonding(struct port *);
241 static void mirror_create(struct bridge *, struct ovsrec_mirror *);
242 static void mirror_destroy(struct mirror *);
243 static void mirror_reconfigure(struct bridge *);
244 static void mirror_reconfigure_one(struct mirror *, struct ovsrec_mirror *);
245 static bool vlan_is_mirrored(const struct mirror *, int vlan);
247 static struct iface *iface_create(struct port *port,
248 const struct ovsrec_interface *if_cfg);
249 static void iface_destroy(struct iface *);
250 static struct iface *iface_lookup(const struct bridge *, const char *name);
251 static struct iface *iface_from_dp_ifidx(const struct bridge *,
253 static bool iface_is_internal(const struct bridge *, const char *name);
254 static void iface_set_mac(struct iface *);
255 static void iface_update_qos(struct iface *, const struct ovsrec_qos *);
257 /* Hooks into ofproto processing. */
258 static struct ofhooks bridge_ofhooks;
260 /* Public functions. */
262 /* Initializes the bridge module, configuring it to obtain its configuration
263 * from an OVSDB server accessed over 'remote', which should be a string in a
264 * form acceptable to ovsdb_idl_create(). */
266 bridge_init(const char *remote)
268 /* Create connection to database. */
269 idl = ovsdb_idl_create(remote, &ovsrec_idl_class);
271 ovsdb_idl_set_write_only(idl, &ovsrec_open_vswitch_col_cur_cfg);
272 ovsdb_idl_set_write_only(idl, &ovsrec_open_vswitch_col_statistics);
273 ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_external_ids);
275 ovsdb_idl_omit(idl, &ovsrec_bridge_col_external_ids);
277 ovsdb_idl_omit(idl, &ovsrec_port_col_external_ids);
278 ovsdb_idl_omit(idl, &ovsrec_port_col_fake_bridge);
280 ovsdb_idl_set_write_only(idl, &ovsrec_interface_col_ofport);
281 ovsdb_idl_set_write_only(idl, &ovsrec_interface_col_statistics);
282 ovsdb_idl_omit(idl, &ovsrec_interface_col_external_ids);
284 /* Register unixctl commands. */
285 unixctl_command_register("fdb/show", bridge_unixctl_fdb_show, NULL);
286 unixctl_command_register("bridge/dump-flows", bridge_unixctl_dump_flows,
288 unixctl_command_register("bridge/reconnect", bridge_unixctl_reconnect,
293 /* Performs configuration that is only necessary once at ovs-vswitchd startup,
294 * but for which the ovs-vswitchd configuration 'cfg' is required. */
296 bridge_configure_once(const struct ovsrec_open_vswitch *cfg)
298 static bool already_configured_once;
299 struct svec bridge_names;
300 struct svec dpif_names, dpif_types;
303 /* Only do this once per ovs-vswitchd run. */
304 if (already_configured_once) {
307 already_configured_once = true;
309 iface_stats_timer = time_msec() + IFACE_STATS_INTERVAL;
311 /* Get all the configured bridges' names from 'cfg' into 'bridge_names'. */
312 svec_init(&bridge_names);
313 for (i = 0; i < cfg->n_bridges; i++) {
314 svec_add(&bridge_names, cfg->bridges[i]->name);
316 svec_sort(&bridge_names);
318 /* Iterate over all system dpifs and delete any of them that do not appear
320 svec_init(&dpif_names);
321 svec_init(&dpif_types);
322 dp_enumerate_types(&dpif_types);
323 for (i = 0; i < dpif_types.n; i++) {
328 dp_enumerate_names(dpif_types.names[i], &dpif_names);
330 /* For each dpif... */
331 for (j = 0; j < dpif_names.n; j++) {
332 retval = dpif_open(dpif_names.names[j], dpif_types.names[i], &dpif);
334 struct svec all_names;
337 /* ...check whether any of its names is in 'bridge_names'. */
338 svec_init(&all_names);
339 dpif_get_all_names(dpif, &all_names);
340 for (k = 0; k < all_names.n; k++) {
341 if (svec_contains(&bridge_names, all_names.names[k])) {
346 /* No. Delete the dpif. */
350 svec_destroy(&all_names);
355 svec_destroy(&bridge_names);
356 svec_destroy(&dpif_names);
357 svec_destroy(&dpif_types);
360 /* Attempt to create the network device 'iface_name' through the netdev
363 set_up_iface(const struct ovsrec_interface *iface_cfg, struct iface *iface,
366 struct shash options;
370 shash_init(&options);
371 for (i = 0; i < iface_cfg->n_options; i++) {
372 shash_add(&options, iface_cfg->key_options[i],
373 xstrdup(iface_cfg->value_options[i]));
377 struct netdev_options netdev_options;
379 memset(&netdev_options, 0, sizeof netdev_options);
380 netdev_options.name = iface_cfg->name;
381 if (!strcmp(iface_cfg->type, "internal")) {
382 /* An "internal" config type maps to a netdev "system" type. */
383 netdev_options.type = "system";
385 netdev_options.type = iface_cfg->type;
387 netdev_options.args = &options;
388 netdev_options.ethertype = NETDEV_ETH_TYPE_NONE;
390 error = netdev_open(&netdev_options, &iface->netdev);
393 netdev_get_carrier(iface->netdev, &iface->enabled);
395 } else if (iface->netdev) {
396 const char *netdev_type = netdev_get_type(iface->netdev);
397 const char *iface_type = iface_cfg->type && strlen(iface_cfg->type)
398 ? iface_cfg->type : NULL;
400 /* An "internal" config type maps to a netdev "system" type. */
401 if (iface_type && !strcmp(iface_type, "internal")) {
402 iface_type = "system";
405 if (!iface_type || !strcmp(netdev_type, iface_type)) {
406 error = netdev_reconfigure(iface->netdev, &options);
408 VLOG_WARN("%s: attempting change device type from %s to %s",
409 iface_cfg->name, netdev_type, iface_type);
413 shash_destroy_free_data(&options);
419 reconfigure_iface(const struct ovsrec_interface *iface_cfg, struct iface *iface)
421 return set_up_iface(iface_cfg, iface, false);
425 check_iface_netdev(struct bridge *br OVS_UNUSED, struct iface *iface,
426 void *aux OVS_UNUSED)
428 if (!iface->netdev) {
429 int error = set_up_iface(iface->cfg, iface, true);
431 VLOG_WARN("could not open netdev on %s, dropping: %s", iface->name,
441 check_iface_dp_ifidx(struct bridge *br, struct iface *iface,
442 void *aux OVS_UNUSED)
444 if (iface->dp_ifidx >= 0) {
445 VLOG_DBG("%s has interface %s on port %d",
447 iface->name, iface->dp_ifidx);
450 VLOG_ERR("%s interface not in %s, dropping",
451 iface->name, dpif_name(br->dpif));
457 set_iface_properties(struct bridge *br OVS_UNUSED, struct iface *iface,
458 void *aux OVS_UNUSED)
460 /* Set policing attributes. */
461 netdev_set_policing(iface->netdev,
462 iface->cfg->ingress_policing_rate,
463 iface->cfg->ingress_policing_burst);
465 /* Set MAC address of internal interfaces other than the local
467 if (iface->dp_ifidx != ODPP_LOCAL
468 && iface_is_internal(br, iface->name)) {
469 iface_set_mac(iface);
475 /* Calls 'cb' for each interfaces in 'br', passing along the 'aux' argument.
476 * Deletes from 'br' all the interfaces for which 'cb' returns false, and then
477 * deletes from 'br' any ports that no longer have any interfaces. */
479 iterate_and_prune_ifaces(struct bridge *br,
480 bool (*cb)(struct bridge *, struct iface *,
486 for (i = 0; i < br->n_ports; ) {
487 struct port *port = br->ports[i];
488 for (j = 0; j < port->n_ifaces; ) {
489 struct iface *iface = port->ifaces[j];
490 if (cb(br, iface, aux)) {
493 iface_destroy(iface);
497 if (port->n_ifaces) {
500 VLOG_ERR("%s port has no interfaces, dropping", port->name);
506 /* Looks at the list of managers in 'ovs_cfg' and extracts their remote IP
507 * addresses and ports into '*managersp' and '*n_managersp'. The caller is
508 * responsible for freeing '*managersp' (with free()).
510 * You may be asking yourself "why does ovs-vswitchd care?", because
511 * ovsdb-server is responsible for connecting to the managers, and ovs-vswitchd
512 * should not be and in fact is not directly involved in that. But
513 * ovs-vswitchd needs to make sure that ovsdb-server can reach the managers, so
514 * it has to tell in-band control where the managers are to enable that.
517 collect_managers(const struct ovsrec_open_vswitch *ovs_cfg,
518 struct sockaddr_in **managersp, size_t *n_managersp)
520 struct sockaddr_in *managers = NULL;
521 size_t n_managers = 0;
523 if (ovs_cfg->n_managers > 0) {
526 managers = xmalloc(ovs_cfg->n_managers * sizeof *managers);
527 for (i = 0; i < ovs_cfg->n_managers; i++) {
528 const char *name = ovs_cfg->managers[i];
529 struct sockaddr_in *sin = &managers[i];
531 if ((!strncmp(name, "tcp:", 4)
532 && inet_parse_active(name + 4, JSONRPC_TCP_PORT, sin)) ||
533 (!strncmp(name, "ssl:", 4)
534 && inet_parse_active(name + 4, JSONRPC_SSL_PORT, sin))) {
540 *managersp = managers;
541 *n_managersp = n_managers;
545 bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg)
547 struct shash old_br, new_br;
548 struct shash_node *node;
549 struct bridge *br, *next;
550 struct sockaddr_in *managers;
553 int sflow_bridge_number;
555 COVERAGE_INC(bridge_reconfigure);
557 collect_managers(ovs_cfg, &managers, &n_managers);
559 /* Collect old and new bridges. */
562 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
563 shash_add(&old_br, br->name, br);
565 for (i = 0; i < ovs_cfg->n_bridges; i++) {
566 const struct ovsrec_bridge *br_cfg = ovs_cfg->bridges[i];
567 if (!shash_add_once(&new_br, br_cfg->name, br_cfg)) {
568 VLOG_WARN("more than one bridge named %s", br_cfg->name);
572 /* Get rid of deleted bridges and add new bridges. */
573 LIST_FOR_EACH_SAFE (br, next, struct bridge, node, &all_bridges) {
574 struct ovsrec_bridge *br_cfg = shash_find_data(&new_br, br->name);
581 SHASH_FOR_EACH (node, &new_br) {
582 const char *br_name = node->name;
583 const struct ovsrec_bridge *br_cfg = node->data;
584 br = shash_find_data(&old_br, br_name);
586 /* If the bridge datapath type has changed, we need to tear it
587 * down and recreate. */
588 if (strcmp(br->cfg->datapath_type, br_cfg->datapath_type)) {
590 bridge_create(br_cfg);
593 bridge_create(br_cfg);
596 shash_destroy(&old_br);
597 shash_destroy(&new_br);
599 /* Reconfigure all bridges. */
600 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
601 bridge_reconfigure_one(br);
604 /* Add and delete ports on all datapaths.
606 * The kernel will reject any attempt to add a given port to a datapath if
607 * that port already belongs to a different datapath, so we must do all
608 * port deletions before any port additions. */
609 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
610 struct odp_port *dpif_ports;
612 struct shash want_ifaces;
614 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
615 bridge_get_all_ifaces(br, &want_ifaces);
616 for (i = 0; i < n_dpif_ports; i++) {
617 const struct odp_port *p = &dpif_ports[i];
618 if (!shash_find(&want_ifaces, p->devname)
619 && strcmp(p->devname, br->name)) {
620 int retval = dpif_port_del(br->dpif, p->port);
622 VLOG_ERR("failed to remove %s interface from %s: %s",
623 p->devname, dpif_name(br->dpif),
628 shash_destroy(&want_ifaces);
631 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
632 struct odp_port *dpif_ports;
634 struct shash cur_ifaces, want_ifaces;
635 struct shash_node *node;
637 /* Get the set of interfaces currently in this datapath. */
638 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
639 shash_init(&cur_ifaces);
640 for (i = 0; i < n_dpif_ports; i++) {
641 const char *name = dpif_ports[i].devname;
642 shash_add_once(&cur_ifaces, name, NULL);
646 /* Get the set of interfaces we want on this datapath. */
647 bridge_get_all_ifaces(br, &want_ifaces);
649 SHASH_FOR_EACH (node, &want_ifaces) {
650 const char *if_name = node->name;
651 struct iface *iface = node->data;
653 if (shash_find(&cur_ifaces, if_name)) {
654 /* Already exists, just reconfigure it. */
656 reconfigure_iface(iface->cfg, iface);
659 /* Need to add to datapath. */
663 /* Add to datapath. */
664 internal = iface_is_internal(br, if_name);
665 error = dpif_port_add(br->dpif, if_name,
666 internal ? ODP_PORT_INTERNAL : 0, NULL);
667 if (error == EFBIG) {
668 VLOG_ERR("ran out of valid port numbers on %s",
669 dpif_name(br->dpif));
672 VLOG_ERR("failed to add %s interface to %s: %s",
673 if_name, dpif_name(br->dpif), strerror(error));
677 shash_destroy(&cur_ifaces);
678 shash_destroy(&want_ifaces);
680 sflow_bridge_number = 0;
681 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
684 struct iface *local_iface;
685 struct iface *hw_addr_iface;
688 bridge_fetch_dp_ifaces(br);
690 iterate_and_prune_ifaces(br, check_iface_netdev, NULL);
691 iterate_and_prune_ifaces(br, check_iface_dp_ifidx, NULL);
693 /* Pick local port hardware address, datapath ID. */
694 bridge_pick_local_hw_addr(br, ea, &hw_addr_iface);
695 local_iface = bridge_get_local_iface(br);
697 int error = netdev_set_etheraddr(local_iface->netdev, ea);
699 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
700 VLOG_ERR_RL(&rl, "bridge %s: failed to set bridge "
701 "Ethernet address: %s",
702 br->name, strerror(error));
706 dpid = bridge_pick_datapath_id(br, ea, hw_addr_iface);
707 ofproto_set_datapath_id(br->ofproto, dpid);
709 dpid_string = xasprintf("%016"PRIx64, dpid);
710 ovsrec_bridge_set_datapath_id(br->cfg, dpid_string);
713 /* Set NetFlow configuration on this bridge. */
714 if (br->cfg->netflow) {
715 struct ovsrec_netflow *nf_cfg = br->cfg->netflow;
716 struct netflow_options opts;
718 memset(&opts, 0, sizeof opts);
720 dpif_get_netflow_ids(br->dpif, &opts.engine_type, &opts.engine_id);
721 if (nf_cfg->engine_type) {
722 opts.engine_type = *nf_cfg->engine_type;
724 if (nf_cfg->engine_id) {
725 opts.engine_id = *nf_cfg->engine_id;
728 opts.active_timeout = nf_cfg->active_timeout;
729 if (!opts.active_timeout) {
730 opts.active_timeout = -1;
731 } else if (opts.active_timeout < 0) {
732 VLOG_WARN("bridge %s: active timeout interval set to negative "
733 "value, using default instead (%d seconds)", br->name,
734 NF_ACTIVE_TIMEOUT_DEFAULT);
735 opts.active_timeout = -1;
738 opts.add_id_to_iface = nf_cfg->add_id_to_interface;
739 if (opts.add_id_to_iface) {
740 if (opts.engine_id > 0x7f) {
741 VLOG_WARN("bridge %s: netflow port mangling may conflict "
742 "with another vswitch, choose an engine id less "
743 "than 128", br->name);
745 if (br->n_ports > 508) {
746 VLOG_WARN("bridge %s: netflow port mangling will conflict "
747 "with another port when more than 508 ports are "
752 opts.collectors.n = nf_cfg->n_targets;
753 opts.collectors.names = nf_cfg->targets;
754 if (ofproto_set_netflow(br->ofproto, &opts)) {
755 VLOG_ERR("bridge %s: problem setting netflow collectors",
759 ofproto_set_netflow(br->ofproto, NULL);
762 /* Set sFlow configuration on this bridge. */
763 if (br->cfg->sflow) {
764 const struct ovsrec_sflow *sflow_cfg = br->cfg->sflow;
765 struct ovsrec_controller **controllers;
766 struct ofproto_sflow_options oso;
767 size_t n_controllers;
770 memset(&oso, 0, sizeof oso);
772 oso.targets.n = sflow_cfg->n_targets;
773 oso.targets.names = sflow_cfg->targets;
775 oso.sampling_rate = SFL_DEFAULT_SAMPLING_RATE;
776 if (sflow_cfg->sampling) {
777 oso.sampling_rate = *sflow_cfg->sampling;
780 oso.polling_interval = SFL_DEFAULT_POLLING_INTERVAL;
781 if (sflow_cfg->polling) {
782 oso.polling_interval = *sflow_cfg->polling;
785 oso.header_len = SFL_DEFAULT_HEADER_SIZE;
786 if (sflow_cfg->header) {
787 oso.header_len = *sflow_cfg->header;
790 oso.sub_id = sflow_bridge_number++;
791 oso.agent_device = sflow_cfg->agent;
793 oso.control_ip = NULL;
794 n_controllers = bridge_get_controllers(br, &controllers);
795 for (i = 0; i < n_controllers; i++) {
796 if (controllers[i]->local_ip) {
797 oso.control_ip = controllers[i]->local_ip;
801 ofproto_set_sflow(br->ofproto, &oso);
803 /* Do not destroy oso.targets because it is owned by sflow_cfg. */
805 ofproto_set_sflow(br->ofproto, NULL);
808 /* Update the controller and related settings. It would be more
809 * straightforward to call this from bridge_reconfigure_one(), but we
810 * can't do it there for two reasons. First, and most importantly, at
811 * that point we don't know the dp_ifidx of any interfaces that have
812 * been added to the bridge (because we haven't actually added them to
813 * the datapath). Second, at that point we haven't set the datapath ID
814 * yet; when a controller is configured, resetting the datapath ID will
815 * immediately disconnect from the controller, so it's better to set
816 * the datapath ID before the controller. */
817 bridge_reconfigure_remotes(br, managers, n_managers);
819 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
820 for (i = 0; i < br->n_ports; i++) {
821 struct port *port = br->ports[i];
824 port_update_vlan_compat(port);
825 port_update_bonding(port);
827 for (j = 0; j < port->n_ifaces; j++) {
828 iface_update_qos(port->ifaces[j], port->cfg->qos);
832 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
833 iterate_and_prune_ifaces(br, set_iface_properties, NULL);
840 get_ovsrec_key_value(const struct ovsdb_idl_row *row,
841 const struct ovsdb_idl_column *column,
844 const struct ovsdb_datum *datum;
845 union ovsdb_atom atom;
848 datum = ovsdb_idl_get(row, column, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING);
849 atom.string = (char *) key;
850 idx = ovsdb_datum_find_key(datum, &atom, OVSDB_TYPE_STRING);
851 return idx == UINT_MAX ? NULL : datum->values[idx].string;
855 bridge_get_other_config(const struct ovsrec_bridge *br_cfg, const char *key)
857 return get_ovsrec_key_value(&br_cfg->header_,
858 &ovsrec_bridge_col_other_config, key);
862 bridge_pick_local_hw_addr(struct bridge *br, uint8_t ea[ETH_ADDR_LEN],
863 struct iface **hw_addr_iface)
869 *hw_addr_iface = NULL;
871 /* Did the user request a particular MAC? */
872 hwaddr = bridge_get_other_config(br->cfg, "hwaddr");
873 if (hwaddr && eth_addr_from_string(hwaddr, ea)) {
874 if (eth_addr_is_multicast(ea)) {
875 VLOG_ERR("bridge %s: cannot set MAC address to multicast "
876 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
877 } else if (eth_addr_is_zero(ea)) {
878 VLOG_ERR("bridge %s: cannot set MAC address to zero", br->name);
884 /* Otherwise choose the minimum non-local MAC address among all of the
886 memset(ea, 0xff, sizeof ea);
887 for (i = 0; i < br->n_ports; i++) {
888 struct port *port = br->ports[i];
889 uint8_t iface_ea[ETH_ADDR_LEN];
892 /* Mirror output ports don't participate. */
893 if (port->is_mirror_output_port) {
897 /* Choose the MAC address to represent the port. */
898 if (port->cfg->mac && eth_addr_from_string(port->cfg->mac, iface_ea)) {
899 /* Find the interface with this Ethernet address (if any) so that
900 * we can provide the correct devname to the caller. */
902 for (j = 0; j < port->n_ifaces; j++) {
903 struct iface *candidate = port->ifaces[j];
904 uint8_t candidate_ea[ETH_ADDR_LEN];
905 if (!netdev_get_etheraddr(candidate->netdev, candidate_ea)
906 && eth_addr_equals(iface_ea, candidate_ea)) {
911 /* Choose the interface whose MAC address will represent the port.
912 * The Linux kernel bonding code always chooses the MAC address of
913 * the first slave added to a bond, and the Fedora networking
914 * scripts always add slaves to a bond in alphabetical order, so
915 * for compatibility we choose the interface with the name that is
916 * first in alphabetical order. */
917 iface = port->ifaces[0];
918 for (j = 1; j < port->n_ifaces; j++) {
919 struct iface *candidate = port->ifaces[j];
920 if (strcmp(candidate->name, iface->name) < 0) {
925 /* The local port doesn't count (since we're trying to choose its
926 * MAC address anyway). */
927 if (iface->dp_ifidx == ODPP_LOCAL) {
932 error = netdev_get_etheraddr(iface->netdev, iface_ea);
934 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
935 VLOG_ERR_RL(&rl, "failed to obtain Ethernet address of %s: %s",
936 iface->name, strerror(error));
941 /* Compare against our current choice. */
942 if (!eth_addr_is_multicast(iface_ea) &&
943 !eth_addr_is_local(iface_ea) &&
944 !eth_addr_is_reserved(iface_ea) &&
945 !eth_addr_is_zero(iface_ea) &&
946 memcmp(iface_ea, ea, ETH_ADDR_LEN) < 0)
948 memcpy(ea, iface_ea, ETH_ADDR_LEN);
949 *hw_addr_iface = iface;
952 if (eth_addr_is_multicast(ea)) {
953 memcpy(ea, br->default_ea, ETH_ADDR_LEN);
954 *hw_addr_iface = NULL;
955 VLOG_WARN("bridge %s: using default bridge Ethernet "
956 "address "ETH_ADDR_FMT, br->name, ETH_ADDR_ARGS(ea));
958 VLOG_DBG("bridge %s: using bridge Ethernet address "ETH_ADDR_FMT,
959 br->name, ETH_ADDR_ARGS(ea));
963 /* Choose and returns the datapath ID for bridge 'br' given that the bridge
964 * Ethernet address is 'bridge_ea'. If 'bridge_ea' is the Ethernet address of
965 * an interface on 'br', then that interface must be passed in as
966 * 'hw_addr_iface'; if 'bridge_ea' was derived some other way, then
967 * 'hw_addr_iface' must be passed in as a null pointer. */
969 bridge_pick_datapath_id(struct bridge *br,
970 const uint8_t bridge_ea[ETH_ADDR_LEN],
971 struct iface *hw_addr_iface)
974 * The procedure for choosing a bridge MAC address will, in the most
975 * ordinary case, also choose a unique MAC that we can use as a datapath
976 * ID. In some special cases, though, multiple bridges will end up with
977 * the same MAC address. This is OK for the bridges, but it will confuse
978 * the OpenFlow controller, because each datapath needs a unique datapath
981 * Datapath IDs must be unique. It is also very desirable that they be
982 * stable from one run to the next, so that policy set on a datapath
985 const char *datapath_id;
988 datapath_id = bridge_get_other_config(br->cfg, "datapath-id");
989 if (datapath_id && dpid_from_string(datapath_id, &dpid)) {
995 if (!netdev_get_vlan_vid(hw_addr_iface->netdev, &vlan)) {
997 * A bridge whose MAC address is taken from a VLAN network device
998 * (that is, a network device created with vconfig(8) or similar
999 * tool) will have the same MAC address as a bridge on the VLAN
1000 * device's physical network device.
1002 * Handle this case by hashing the physical network device MAC
1003 * along with the VLAN identifier.
1005 uint8_t buf[ETH_ADDR_LEN + 2];
1006 memcpy(buf, bridge_ea, ETH_ADDR_LEN);
1007 buf[ETH_ADDR_LEN] = vlan >> 8;
1008 buf[ETH_ADDR_LEN + 1] = vlan;
1009 return dpid_from_hash(buf, sizeof buf);
1012 * Assume that this bridge's MAC address is unique, since it
1013 * doesn't fit any of the cases we handle specially.
1018 * A purely internal bridge, that is, one that has no non-virtual
1019 * network devices on it at all, is more difficult because it has no
1020 * natural unique identifier at all.
1022 * When the host is a XenServer, we handle this case by hashing the
1023 * host's UUID with the name of the bridge. Names of bridges are
1024 * persistent across XenServer reboots, although they can be reused if
1025 * an internal network is destroyed and then a new one is later
1026 * created, so this is fairly effective.
1028 * When the host is not a XenServer, we punt by using a random MAC
1029 * address on each run.
1031 const char *host_uuid = xenserver_get_host_uuid();
1033 char *combined = xasprintf("%s,%s", host_uuid, br->name);
1034 dpid = dpid_from_hash(combined, strlen(combined));
1040 return eth_addr_to_uint64(bridge_ea);
1044 dpid_from_hash(const void *data, size_t n)
1046 uint8_t hash[SHA1_DIGEST_SIZE];
1048 BUILD_ASSERT_DECL(sizeof hash >= ETH_ADDR_LEN);
1049 sha1_bytes(data, n, hash);
1050 eth_addr_mark_random(hash);
1051 return eth_addr_to_uint64(hash);
1055 iface_refresh_stats(struct iface *iface)
1061 static const struct iface_stat iface_stats[] = {
1062 { "rx_packets", offsetof(struct netdev_stats, rx_packets) },
1063 { "tx_packets", offsetof(struct netdev_stats, tx_packets) },
1064 { "rx_bytes", offsetof(struct netdev_stats, rx_bytes) },
1065 { "tx_bytes", offsetof(struct netdev_stats, tx_bytes) },
1066 { "rx_dropped", offsetof(struct netdev_stats, rx_dropped) },
1067 { "tx_dropped", offsetof(struct netdev_stats, tx_dropped) },
1068 { "rx_errors", offsetof(struct netdev_stats, rx_errors) },
1069 { "tx_errors", offsetof(struct netdev_stats, tx_errors) },
1070 { "rx_frame_err", offsetof(struct netdev_stats, rx_frame_errors) },
1071 { "rx_over_err", offsetof(struct netdev_stats, rx_over_errors) },
1072 { "rx_crc_err", offsetof(struct netdev_stats, rx_crc_errors) },
1073 { "collisions", offsetof(struct netdev_stats, collisions) },
1075 enum { N_STATS = ARRAY_SIZE(iface_stats) };
1076 const struct iface_stat *s;
1078 char *keys[N_STATS];
1079 int64_t values[N_STATS];
1082 struct netdev_stats stats;
1084 /* Intentionally ignore return value, since errors will set 'stats' to
1085 * all-1s, and we will deal with that correctly below. */
1086 netdev_get_stats(iface->netdev, &stats);
1089 for (s = iface_stats; s < &iface_stats[N_STATS]; s++) {
1090 uint64_t value = *(uint64_t *) (((char *) &stats) + s->offset);
1091 if (value != UINT64_MAX) {
1098 ovsrec_interface_set_statistics(iface->cfg, keys, values, n);
1104 const struct ovsrec_open_vswitch *cfg;
1106 bool datapath_destroyed;
1107 bool database_changed;
1110 /* Let each bridge do the work that it needs to do. */
1111 datapath_destroyed = false;
1112 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1113 int error = bridge_run_one(br);
1115 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1116 VLOG_ERR_RL(&rl, "bridge %s: datapath was destroyed externally, "
1117 "forcing reconfiguration", br->name);
1118 datapath_destroyed = true;
1122 /* (Re)configure if necessary. */
1123 database_changed = ovsdb_idl_run(idl);
1124 cfg = ovsrec_open_vswitch_first(idl);
1125 if (database_changed || datapath_destroyed) {
1127 struct ovsdb_idl_txn *txn = ovsdb_idl_txn_create(idl);
1129 bridge_configure_once(cfg);
1130 bridge_reconfigure(cfg);
1132 ovsrec_open_vswitch_set_cur_cfg(cfg, cfg->next_cfg);
1133 ovsdb_idl_txn_commit(txn);
1134 ovsdb_idl_txn_destroy(txn); /* XXX */
1136 /* We still need to reconfigure to avoid dangling pointers to
1137 * now-destroyed ovsrec structures inside bridge data. */
1138 static const struct ovsrec_open_vswitch null_cfg;
1140 bridge_reconfigure(&null_cfg);
1145 /* Re-configure SSL. We do this on every trip through the main loop,
1146 * instead of just when the database changes, because the contents of the
1147 * key and certificate files can change without the database changing. */
1148 if (cfg && cfg->ssl) {
1149 const struct ovsrec_ssl *ssl = cfg->ssl;
1151 stream_ssl_set_key_and_cert(ssl->private_key, ssl->certificate);
1152 stream_ssl_set_ca_cert_file(ssl->ca_cert, ssl->bootstrap_ca_cert);
1156 /* Refresh interface stats if necessary. */
1157 if (time_msec() >= iface_stats_timer) {
1158 struct ovsdb_idl_txn *txn;
1160 txn = ovsdb_idl_txn_create(idl);
1161 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1164 for (i = 0; i < br->n_ports; i++) {
1165 struct port *port = br->ports[i];
1168 for (j = 0; j < port->n_ifaces; j++) {
1169 struct iface *iface = port->ifaces[j];
1170 iface_refresh_stats(iface);
1174 ovsdb_idl_txn_commit(txn);
1175 ovsdb_idl_txn_destroy(txn); /* XXX */
1177 iface_stats_timer = time_msec() + IFACE_STATS_INTERVAL;
1186 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1187 ofproto_wait(br->ofproto);
1188 if (ofproto_has_primary_controller(br->ofproto)) {
1192 mac_learning_wait(br->ml);
1195 ovsdb_idl_wait(idl);
1196 poll_timer_wait_until(iface_stats_timer);
1199 /* Forces 'br' to revalidate all of its flows. This is appropriate when 'br''s
1200 * configuration changes. */
1202 bridge_flush(struct bridge *br)
1204 COVERAGE_INC(bridge_flush);
1206 mac_learning_flush(br->ml);
1209 /* Returns the 'br' interface for the ODPP_LOCAL port, or null if 'br' has no
1210 * such interface. */
1211 static struct iface *
1212 bridge_get_local_iface(struct bridge *br)
1216 for (i = 0; i < br->n_ports; i++) {
1217 struct port *port = br->ports[i];
1218 for (j = 0; j < port->n_ifaces; j++) {
1219 struct iface *iface = port->ifaces[j];
1220 if (iface->dp_ifidx == ODPP_LOCAL) {
1229 /* Bridge unixctl user interface functions. */
1231 bridge_unixctl_fdb_show(struct unixctl_conn *conn,
1232 const char *args, void *aux OVS_UNUSED)
1234 struct ds ds = DS_EMPTY_INITIALIZER;
1235 const struct bridge *br;
1236 const struct mac_entry *e;
1238 br = bridge_lookup(args);
1240 unixctl_command_reply(conn, 501, "no such bridge");
1244 ds_put_cstr(&ds, " port VLAN MAC Age\n");
1245 LIST_FOR_EACH (e, struct mac_entry, lru_node, &br->ml->lrus) {
1246 if (e->port < 0 || e->port >= br->n_ports) {
1249 ds_put_format(&ds, "%5d %4d "ETH_ADDR_FMT" %3d\n",
1250 br->ports[e->port]->ifaces[0]->dp_ifidx,
1251 e->vlan, ETH_ADDR_ARGS(e->mac), mac_entry_age(e));
1253 unixctl_command_reply(conn, 200, ds_cstr(&ds));
1257 /* Bridge reconfiguration functions. */
1258 static struct bridge *
1259 bridge_create(const struct ovsrec_bridge *br_cfg)
1263 static int first = 1;
1265 assert(!bridge_lookup(br_cfg->name));
1266 br = xzalloc(sizeof *br);
1268 error = dpif_create_and_open(br_cfg->name, br_cfg->datapath_type,
1274 dpif_flow_flush(br->dpif);
1276 error = ofproto_create(br_cfg->name, br_cfg->datapath_type, &bridge_ofhooks,
1279 VLOG_ERR("failed to create switch %s: %s", br_cfg->name,
1281 dpif_delete(br->dpif);
1282 dpif_close(br->dpif);
1287 br->name = xstrdup(br_cfg->name);
1289 br->ml = mac_learning_create();
1290 eth_addr_nicira_random(br->default_ea);
1292 port_array_init(&br->ifaces);
1294 shash_init(&br->port_by_name);
1295 shash_init(&br->iface_by_name);
1299 list_push_back(&all_bridges, &br->node);
1301 VLOG_INFO("created bridge %s on %s", br->name, dpif_name(br->dpif));
1304 /* The first time a bridge is created, we launch the datapath thread */
1306 fprintf(stderr, "THREADED version running!\n");
1316 bridge_destroy(struct bridge *br)
1321 while (br->n_ports > 0) {
1322 port_destroy(br->ports[br->n_ports - 1]);
1324 list_remove(&br->node);
1325 error = dpif_delete(br->dpif);
1326 if (error && error != ENOENT) {
1327 VLOG_ERR("failed to delete %s: %s",
1328 dpif_name(br->dpif), strerror(error));
1330 dpif_close(br->dpif);
1331 ofproto_destroy(br->ofproto);
1332 mac_learning_destroy(br->ml);
1333 port_array_destroy(&br->ifaces);
1334 shash_destroy(&br->port_by_name);
1335 shash_destroy(&br->iface_by_name);
1342 static struct bridge *
1343 bridge_lookup(const char *name)
1347 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1348 if (!strcmp(br->name, name)) {
1355 /* Handle requests for a listing of all flows known by the OpenFlow
1356 * stack, including those normally hidden. */
1358 bridge_unixctl_dump_flows(struct unixctl_conn *conn,
1359 const char *args, void *aux OVS_UNUSED)
1364 br = bridge_lookup(args);
1366 unixctl_command_reply(conn, 501, "Unknown bridge");
1371 ofproto_get_all_flows(br->ofproto, &results);
1373 unixctl_command_reply(conn, 200, ds_cstr(&results));
1374 ds_destroy(&results);
1377 /* "bridge/reconnect [BRIDGE]": makes BRIDGE drop all of its controller
1378 * connections and reconnect. If BRIDGE is not specified, then all bridges
1379 * drop their controller connections and reconnect. */
1381 bridge_unixctl_reconnect(struct unixctl_conn *conn,
1382 const char *args, void *aux OVS_UNUSED)
1385 if (args[0] != '\0') {
1386 br = bridge_lookup(args);
1388 unixctl_command_reply(conn, 501, "Unknown bridge");
1391 ofproto_reconnect_controllers(br->ofproto);
1393 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
1394 ofproto_reconnect_controllers(br->ofproto);
1397 unixctl_command_reply(conn, 200, NULL);
1401 bridge_run_one(struct bridge *br)
1405 error = ofproto_run1(br->ofproto);
1410 mac_learning_run(br->ml, ofproto_get_revalidate_set(br->ofproto));
1413 error = ofproto_run2(br->ofproto, br->flush);
1420 bridge_get_controllers(const struct bridge *br,
1421 struct ovsrec_controller ***controllersp)
1423 struct ovsrec_controller **controllers;
1424 size_t n_controllers;
1426 controllers = br->cfg->controller;
1427 n_controllers = br->cfg->n_controller;
1429 if (n_controllers == 1 && !strcmp(controllers[0]->target, "none")) {
1435 *controllersp = controllers;
1437 return n_controllers;
1441 bridge_reconfigure_one(struct bridge *br)
1443 struct shash old_ports, new_ports;
1444 struct svec snoops, old_snoops;
1445 struct shash_node *node;
1446 enum ofproto_fail_mode fail_mode;
1449 /* Collect old ports. */
1450 shash_init(&old_ports);
1451 for (i = 0; i < br->n_ports; i++) {
1452 shash_add(&old_ports, br->ports[i]->name, br->ports[i]);
1455 /* Collect new ports. */
1456 shash_init(&new_ports);
1457 for (i = 0; i < br->cfg->n_ports; i++) {
1458 const char *name = br->cfg->ports[i]->name;
1459 if (!shash_add_once(&new_ports, name, br->cfg->ports[i])) {
1460 VLOG_WARN("bridge %s: %s specified twice as bridge port",
1465 /* If we have a controller, then we need a local port. Complain if the
1466 * user didn't specify one.
1468 * XXX perhaps we should synthesize a port ourselves in this case. */
1469 if (bridge_get_controllers(br, NULL)) {
1470 char local_name[IF_NAMESIZE];
1473 error = dpif_port_get_name(br->dpif, ODPP_LOCAL,
1474 local_name, sizeof local_name);
1475 if (!error && !shash_find(&new_ports, local_name)) {
1476 VLOG_WARN("bridge %s: controller specified but no local port "
1477 "(port named %s) defined",
1478 br->name, local_name);
1482 /* Get rid of deleted ports.
1483 * Get rid of deleted interfaces on ports that still exist. */
1484 SHASH_FOR_EACH (node, &old_ports) {
1485 struct port *port = node->data;
1486 const struct ovsrec_port *port_cfg;
1488 port_cfg = shash_find_data(&new_ports, node->name);
1492 port_del_ifaces(port, port_cfg);
1496 /* Create new ports.
1497 * Add new interfaces to existing ports.
1498 * Reconfigure existing ports. */
1499 SHASH_FOR_EACH (node, &new_ports) {
1500 struct port *port = shash_find_data(&old_ports, node->name);
1502 port = port_create(br, node->name);
1505 port_reconfigure(port, node->data);
1506 if (!port->n_ifaces) {
1507 VLOG_WARN("bridge %s: port %s has no interfaces, dropping",
1508 br->name, port->name);
1512 shash_destroy(&old_ports);
1513 shash_destroy(&new_ports);
1515 /* Set the fail-mode */
1516 fail_mode = !br->cfg->fail_mode
1517 || !strcmp(br->cfg->fail_mode, "standalone")
1518 ? OFPROTO_FAIL_STANDALONE
1519 : OFPROTO_FAIL_SECURE;
1520 if (ofproto_get_fail_mode(br->ofproto) != fail_mode
1521 && !ofproto_has_primary_controller(br->ofproto)) {
1522 ofproto_flush_flows(br->ofproto);
1524 ofproto_set_fail_mode(br->ofproto, fail_mode);
1526 /* Delete all flows if we're switching from connected to standalone or vice
1527 * versa. (XXX Should we delete all flows if we are switching from one
1528 * controller to another?) */
1530 /* Configure OpenFlow controller connection snooping. */
1532 svec_add_nocopy(&snoops, xasprintf("punix:%s/%s.snoop",
1533 ovs_rundir, br->name));
1534 svec_init(&old_snoops);
1535 ofproto_get_snoops(br->ofproto, &old_snoops);
1536 if (!svec_equal(&snoops, &old_snoops)) {
1537 ofproto_set_snoops(br->ofproto, &snoops);
1539 svec_destroy(&snoops);
1540 svec_destroy(&old_snoops);
1542 mirror_reconfigure(br);
1545 /* Initializes 'oc' appropriately as a management service controller for
1548 * The caller must free oc->target when it is no longer needed. */
1550 bridge_ofproto_controller_for_mgmt(const struct bridge *br,
1551 struct ofproto_controller *oc)
1553 oc->target = xasprintf("punix:%s/%s.mgmt", ovs_rundir, br->name);
1554 oc->max_backoff = 0;
1555 oc->probe_interval = 60;
1556 oc->band = OFPROTO_OUT_OF_BAND;
1557 oc->accept_re = NULL;
1558 oc->update_resolv_conf = false;
1560 oc->burst_limit = 0;
1563 /* Converts ovsrec_controller 'c' into an ofproto_controller in 'oc'. */
1565 bridge_ofproto_controller_from_ovsrec(const struct ovsrec_controller *c,
1566 struct ofproto_controller *oc)
1568 oc->target = c->target;
1569 oc->max_backoff = c->max_backoff ? *c->max_backoff / 1000 : 8;
1570 oc->probe_interval = c->inactivity_probe ? *c->inactivity_probe / 1000 : 5;
1571 oc->band = (!c->connection_mode || !strcmp(c->connection_mode, "in-band")
1572 ? OFPROTO_IN_BAND : OFPROTO_OUT_OF_BAND);
1573 oc->accept_re = c->discover_accept_regex;
1574 oc->update_resolv_conf = c->discover_update_resolv_conf;
1575 oc->rate_limit = c->controller_rate_limit ? *c->controller_rate_limit : 0;
1576 oc->burst_limit = (c->controller_burst_limit
1577 ? *c->controller_burst_limit : 0);
1580 /* Configures the IP stack for 'br''s local interface properly according to the
1581 * configuration in 'c'. */
1583 bridge_configure_local_iface_netdev(struct bridge *br,
1584 struct ovsrec_controller *c)
1586 struct netdev *netdev;
1587 struct in_addr mask, gateway;
1589 struct iface *local_iface;
1592 /* Controller discovery does its own TCP/IP configuration later. */
1593 if (strcmp(c->target, "discover")) {
1597 /* If there's no local interface or no IP address, give up. */
1598 local_iface = bridge_get_local_iface(br);
1599 if (!local_iface || !c->local_ip || !inet_aton(c->local_ip, &ip)) {
1603 /* Bring up the local interface. */
1604 netdev = local_iface->netdev;
1605 netdev_turn_flags_on(netdev, NETDEV_UP, true);
1607 /* Configure the IP address and netmask. */
1608 if (!c->local_netmask
1609 || !inet_aton(c->local_netmask, &mask)
1611 mask.s_addr = guess_netmask(ip.s_addr);
1613 if (!netdev_set_in4(netdev, ip, mask)) {
1614 VLOG_INFO("bridge %s: configured IP address "IP_FMT", netmask "IP_FMT,
1615 br->name, IP_ARGS(&ip.s_addr), IP_ARGS(&mask.s_addr));
1618 /* Configure the default gateway. */
1619 if (c->local_gateway
1620 && inet_aton(c->local_gateway, &gateway)
1621 && gateway.s_addr) {
1622 if (!netdev_add_router(netdev, gateway)) {
1623 VLOG_INFO("bridge %s: configured gateway "IP_FMT,
1624 br->name, IP_ARGS(&gateway.s_addr));
1630 bridge_reconfigure_remotes(struct bridge *br,
1631 const struct sockaddr_in *managers,
1634 struct ovsrec_controller **controllers;
1635 size_t n_controllers;
1638 struct ofproto_controller *ocs;
1642 ofproto_set_extra_in_band_remotes(br->ofproto, managers, n_managers);
1643 had_primary = ofproto_has_primary_controller(br->ofproto);
1645 n_controllers = bridge_get_controllers(br, &controllers);
1647 ocs = xmalloc((n_controllers + 1) * sizeof *ocs);
1650 bridge_ofproto_controller_for_mgmt(br, &ocs[n_ocs++]);
1651 for (i = 0; i < n_controllers; i++) {
1652 struct ovsrec_controller *c = controllers[i];
1654 if (!strncmp(c->target, "punix:", 6)
1655 || !strncmp(c->target, "unix:", 5)) {
1656 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1658 /* Prevent remote ovsdb-server users from accessing arbitrary Unix
1659 * domain sockets and overwriting arbitrary local files. */
1660 VLOG_ERR_RL(&rl, "%s: not adding Unix domain socket controller "
1661 "\"%s\" due to possibility for remote exploit",
1662 dpif_name(br->dpif), c->target);
1666 bridge_configure_local_iface_netdev(br, c);
1667 bridge_ofproto_controller_from_ovsrec(c, &ocs[n_ocs++]);
1670 ofproto_set_controllers(br->ofproto, ocs, n_ocs);
1671 free(ocs[0].target); /* From bridge_ofproto_controller_for_mgmt(). */
1674 if (had_primary != ofproto_has_primary_controller(br->ofproto)) {
1675 ofproto_flush_flows(br->ofproto);
1678 /* If there are no controllers and the bridge is in standalone
1679 * mode, set up a flow that matches every packet and directs
1680 * them to OFPP_NORMAL (which goes to us). Otherwise, the
1681 * switch is in secure mode and we won't pass any traffic until
1682 * a controller has been defined and it tells us to do so. */
1684 && ofproto_get_fail_mode(br->ofproto) == OFPROTO_FAIL_STANDALONE) {
1685 union ofp_action action;
1688 memset(&action, 0, sizeof action);
1689 action.type = htons(OFPAT_OUTPUT);
1690 action.output.len = htons(sizeof action);
1691 action.output.port = htons(OFPP_NORMAL);
1692 memset(&flow, 0, sizeof flow);
1693 ofproto_add_flow(br->ofproto, &flow, OVSFW_ALL, 0, &action, 1, 0);
1698 bridge_get_all_ifaces(const struct bridge *br, struct shash *ifaces)
1703 for (i = 0; i < br->n_ports; i++) {
1704 struct port *port = br->ports[i];
1705 for (j = 0; j < port->n_ifaces; j++) {
1706 struct iface *iface = port->ifaces[j];
1707 shash_add_once(ifaces, iface->name, iface);
1709 if (port->n_ifaces > 1 && port->cfg->bond_fake_iface) {
1710 shash_add_once(ifaces, port->name, NULL);
1715 /* For robustness, in case the administrator moves around datapath ports behind
1716 * our back, we re-check all the datapath port numbers here.
1718 * This function will set the 'dp_ifidx' members of interfaces that have
1719 * disappeared to -1, so only call this function from a context where those
1720 * 'struct iface's will be removed from the bridge. Otherwise, the -1
1721 * 'dp_ifidx'es will cause trouble later when we try to send them to the
1722 * datapath, which doesn't support UINT16_MAX+1 ports. */
1724 bridge_fetch_dp_ifaces(struct bridge *br)
1726 struct odp_port *dpif_ports;
1727 size_t n_dpif_ports;
1730 /* Reset all interface numbers. */
1731 for (i = 0; i < br->n_ports; i++) {
1732 struct port *port = br->ports[i];
1733 for (j = 0; j < port->n_ifaces; j++) {
1734 struct iface *iface = port->ifaces[j];
1735 iface->dp_ifidx = -1;
1738 port_array_clear(&br->ifaces);
1740 dpif_port_list(br->dpif, &dpif_ports, &n_dpif_ports);
1741 for (i = 0; i < n_dpif_ports; i++) {
1742 struct odp_port *p = &dpif_ports[i];
1743 struct iface *iface = iface_lookup(br, p->devname);
1745 if (iface->dp_ifidx >= 0) {
1746 VLOG_WARN("%s reported interface %s twice",
1747 dpif_name(br->dpif), p->devname);
1748 } else if (iface_from_dp_ifidx(br, p->port)) {
1749 VLOG_WARN("%s reported interface %"PRIu16" twice",
1750 dpif_name(br->dpif), p->port);
1752 port_array_set(&br->ifaces, p->port, iface);
1753 iface->dp_ifidx = p->port;
1757 int64_t ofport = (iface->dp_ifidx >= 0
1758 ? odp_port_to_ofp_port(iface->dp_ifidx)
1760 ovsrec_interface_set_ofport(iface->cfg, &ofport, 1);
1767 /* Bridge packet processing functions. */
1770 bond_hash(const uint8_t mac[ETH_ADDR_LEN])
1772 return hash_bytes(mac, ETH_ADDR_LEN, 0) & BOND_MASK;
1775 static struct bond_entry *
1776 lookup_bond_entry(const struct port *port, const uint8_t mac[ETH_ADDR_LEN])
1778 return &port->bond_hash[bond_hash(mac)];
1782 bond_choose_iface(const struct port *port)
1784 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1785 size_t i, best_down_slave = -1;
1786 long long next_delay_expiration = LLONG_MAX;
1788 for (i = 0; i < port->n_ifaces; i++) {
1789 struct iface *iface = port->ifaces[i];
1791 if (iface->enabled) {
1793 } else if (iface->delay_expires < next_delay_expiration) {
1794 best_down_slave = i;
1795 next_delay_expiration = iface->delay_expires;
1799 if (best_down_slave != -1) {
1800 struct iface *iface = port->ifaces[best_down_slave];
1802 VLOG_INFO_RL(&rl, "interface %s: skipping remaining %lli ms updelay "
1803 "since no other interface is up", iface->name,
1804 iface->delay_expires - time_msec());
1805 bond_enable_slave(iface, true);
1808 return best_down_slave;
1812 choose_output_iface(const struct port *port, const uint8_t *dl_src,
1813 uint16_t *dp_ifidx, tag_type *tags)
1815 struct iface *iface;
1817 assert(port->n_ifaces);
1818 if (port->n_ifaces == 1) {
1819 iface = port->ifaces[0];
1821 struct bond_entry *e = lookup_bond_entry(port, dl_src);
1822 if (e->iface_idx < 0 || e->iface_idx >= port->n_ifaces
1823 || !port->ifaces[e->iface_idx]->enabled) {
1824 /* XXX select interface properly. The current interface selection
1825 * is only good for testing the rebalancing code. */
1826 e->iface_idx = bond_choose_iface(port);
1827 if (e->iface_idx < 0) {
1828 *tags |= port->no_ifaces_tag;
1831 e->iface_tag = tag_create_random();
1832 ((struct port *) port)->bond_compat_is_stale = true;
1834 *tags |= e->iface_tag;
1835 iface = port->ifaces[e->iface_idx];
1837 *dp_ifidx = iface->dp_ifidx;
1838 *tags |= iface->tag; /* Currently only used for bonding. */
1843 bond_link_status_update(struct iface *iface, bool carrier)
1845 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1846 struct port *port = iface->port;
1848 if ((carrier == iface->enabled) == (iface->delay_expires == LLONG_MAX)) {
1849 /* Nothing to do. */
1852 VLOG_INFO_RL(&rl, "interface %s: carrier %s",
1853 iface->name, carrier ? "detected" : "dropped");
1854 if (carrier == iface->enabled) {
1855 iface->delay_expires = LLONG_MAX;
1856 VLOG_INFO_RL(&rl, "interface %s: will not be %s",
1857 iface->name, carrier ? "disabled" : "enabled");
1858 } else if (carrier && port->active_iface < 0) {
1859 bond_enable_slave(iface, true);
1860 if (port->updelay) {
1861 VLOG_INFO_RL(&rl, "interface %s: skipping %d ms updelay since no "
1862 "other interface is up", iface->name, port->updelay);
1865 int delay = carrier ? port->updelay : port->downdelay;
1866 iface->delay_expires = time_msec() + delay;
1869 "interface %s: will be %s if it stays %s for %d ms",
1871 carrier ? "enabled" : "disabled",
1872 carrier ? "up" : "down",
1879 bond_choose_active_iface(struct port *port)
1881 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
1883 port->active_iface = bond_choose_iface(port);
1884 port->active_iface_tag = tag_create_random();
1885 if (port->active_iface >= 0) {
1886 VLOG_INFO_RL(&rl, "port %s: active interface is now %s",
1887 port->name, port->ifaces[port->active_iface]->name);
1889 VLOG_WARN_RL(&rl, "port %s: all ports disabled, no active interface",
1895 bond_enable_slave(struct iface *iface, bool enable)
1897 struct port *port = iface->port;
1898 struct bridge *br = port->bridge;
1900 /* This acts as a recursion check. If the act of disabling a slave
1901 * causes a different slave to be enabled, the flag will allow us to
1902 * skip redundant work when we reenter this function. It must be
1903 * cleared on exit to keep things safe with multiple bonds. */
1904 static bool moving_active_iface = false;
1906 iface->delay_expires = LLONG_MAX;
1907 if (enable == iface->enabled) {
1911 iface->enabled = enable;
1912 if (!iface->enabled) {
1913 VLOG_WARN("interface %s: disabled", iface->name);
1914 ofproto_revalidate(br->ofproto, iface->tag);
1915 if (iface->port_ifidx == port->active_iface) {
1916 ofproto_revalidate(br->ofproto,
1917 port->active_iface_tag);
1919 /* Disabling a slave can lead to another slave being immediately
1920 * enabled if there will be no active slaves but one is waiting
1921 * on an updelay. In this case we do not need to run most of the
1922 * code for the newly enabled slave since there was no period
1923 * without an active slave and it is redundant with the disabling
1925 moving_active_iface = true;
1926 bond_choose_active_iface(port);
1928 bond_send_learning_packets(port);
1930 VLOG_WARN("interface %s: enabled", iface->name);
1931 if (port->active_iface < 0 && !moving_active_iface) {
1932 ofproto_revalidate(br->ofproto, port->no_ifaces_tag);
1933 bond_choose_active_iface(port);
1934 bond_send_learning_packets(port);
1936 iface->tag = tag_create_random();
1939 moving_active_iface = false;
1940 port->bond_compat_is_stale = true;
1943 /* Attempts to make the sum of the bond slaves' statistics appear on the fake
1944 * bond interface. */
1946 bond_update_fake_iface_stats(struct port *port)
1948 struct netdev_stats bond_stats;
1949 struct netdev *bond_dev;
1952 memset(&bond_stats, 0, sizeof bond_stats);
1954 for (i = 0; i < port->n_ifaces; i++) {
1955 struct netdev_stats slave_stats;
1957 if (!netdev_get_stats(port->ifaces[i]->netdev, &slave_stats)) {
1958 /* XXX: We swap the stats here because they are swapped back when
1959 * reported by the internal device. The reason for this is
1960 * internal devices normally represent packets going into the system
1961 * but when used as fake bond device they represent packets leaving
1962 * the system. We really should do this in the internal device
1963 * itself because changing it here reverses the counts from the
1964 * perspective of the switch. However, the internal device doesn't
1965 * know what type of device it represents so we have to do it here
1967 bond_stats.tx_packets += slave_stats.rx_packets;
1968 bond_stats.tx_bytes += slave_stats.rx_bytes;
1969 bond_stats.rx_packets += slave_stats.tx_packets;
1970 bond_stats.rx_bytes += slave_stats.tx_bytes;
1974 if (!netdev_open_default(port->name, &bond_dev)) {
1975 netdev_set_stats(bond_dev, &bond_stats);
1976 netdev_close(bond_dev);
1981 bond_run(struct bridge *br)
1985 for (i = 0; i < br->n_ports; i++) {
1986 struct port *port = br->ports[i];
1988 if (port->n_ifaces >= 2) {
1989 for (j = 0; j < port->n_ifaces; j++) {
1990 struct iface *iface = port->ifaces[j];
1991 if (time_msec() >= iface->delay_expires) {
1992 bond_enable_slave(iface, !iface->enabled);
1996 if (port->bond_fake_iface
1997 && time_msec() >= port->bond_next_fake_iface_update) {
1998 bond_update_fake_iface_stats(port);
1999 port->bond_next_fake_iface_update = time_msec() + 1000;
2003 if (port->bond_compat_is_stale) {
2004 port->bond_compat_is_stale = false;
2005 port_update_bond_compat(port);
2011 bond_wait(struct bridge *br)
2015 for (i = 0; i < br->n_ports; i++) {
2016 struct port *port = br->ports[i];
2017 if (port->n_ifaces < 2) {
2020 for (j = 0; j < port->n_ifaces; j++) {
2021 struct iface *iface = port->ifaces[j];
2022 if (iface->delay_expires != LLONG_MAX) {
2023 poll_timer_wait_until(iface->delay_expires);
2026 if (port->bond_fake_iface) {
2027 poll_timer_wait_until(port->bond_next_fake_iface_update);
2033 set_dst(struct dst *p, const flow_t *flow,
2034 const struct port *in_port, const struct port *out_port,
2037 p->vlan = (out_port->vlan >= 0 ? OFP_VLAN_NONE
2038 : in_port->vlan >= 0 ? in_port->vlan
2039 : ntohs(flow->dl_vlan));
2040 return choose_output_iface(out_port, flow->dl_src, &p->dp_ifidx, tags);
2044 swap_dst(struct dst *p, struct dst *q)
2046 struct dst tmp = *p;
2051 /* Moves all the dsts with vlan == 'vlan' to the front of the 'n_dsts' in
2052 * 'dsts'. (This may help performance by reducing the number of VLAN changes
2053 * that we push to the datapath. We could in fact fully sort the array by
2054 * vlan, but in most cases there are at most two different vlan tags so that's
2055 * possibly overkill.) */
2057 partition_dsts(struct dst *dsts, size_t n_dsts, int vlan)
2059 struct dst *first = dsts;
2060 struct dst *last = dsts + n_dsts;
2062 while (first != last) {
2064 * - All dsts < first have vlan == 'vlan'.
2065 * - All dsts >= last have vlan != 'vlan'.
2066 * - first < last. */
2067 while (first->vlan == vlan) {
2068 if (++first == last) {
2073 /* Same invariants, plus one additional:
2074 * - first->vlan != vlan.
2076 while (last[-1].vlan != vlan) {
2077 if (--last == first) {
2082 /* Same invariants, plus one additional:
2083 * - last[-1].vlan == vlan.*/
2084 swap_dst(first++, --last);
2089 mirror_mask_ffs(mirror_mask_t mask)
2091 BUILD_ASSERT_DECL(sizeof(unsigned int) >= sizeof(mask));
2096 dst_is_duplicate(const struct dst *dsts, size_t n_dsts,
2097 const struct dst *test)
2100 for (i = 0; i < n_dsts; i++) {
2101 if (dsts[i].vlan == test->vlan && dsts[i].dp_ifidx == test->dp_ifidx) {
2109 port_trunks_vlan(const struct port *port, uint16_t vlan)
2111 return (port->vlan < 0
2112 && (!port->trunks || bitmap_is_set(port->trunks, vlan)));
2116 port_includes_vlan(const struct port *port, uint16_t vlan)
2118 return vlan == port->vlan || port_trunks_vlan(port, vlan);
2122 compose_dsts(const struct bridge *br, const flow_t *flow, uint16_t vlan,
2123 const struct port *in_port, const struct port *out_port,
2124 struct dst dsts[], tag_type *tags, uint16_t *nf_output_iface)
2126 mirror_mask_t mirrors = in_port->src_mirrors;
2127 struct dst *dst = dsts;
2130 if (out_port == FLOOD_PORT) {
2131 /* XXX use ODP_FLOOD if no vlans or bonding. */
2132 /* XXX even better, define each VLAN as a datapath port group */
2133 for (i = 0; i < br->n_ports; i++) {
2134 struct port *port = br->ports[i];
2135 if (port != in_port && port_includes_vlan(port, vlan)
2136 && !port->is_mirror_output_port
2137 && set_dst(dst, flow, in_port, port, tags)) {
2138 mirrors |= port->dst_mirrors;
2142 *nf_output_iface = NF_OUT_FLOOD;
2143 } else if (out_port && set_dst(dst, flow, in_port, out_port, tags)) {
2144 *nf_output_iface = dst->dp_ifidx;
2145 mirrors |= out_port->dst_mirrors;
2150 struct mirror *m = br->mirrors[mirror_mask_ffs(mirrors) - 1];
2151 if (!m->n_vlans || vlan_is_mirrored(m, vlan)) {
2153 if (set_dst(dst, flow, in_port, m->out_port, tags)
2154 && !dst_is_duplicate(dsts, dst - dsts, dst)) {
2158 for (i = 0; i < br->n_ports; i++) {
2159 struct port *port = br->ports[i];
2160 if (port_includes_vlan(port, m->out_vlan)
2161 && set_dst(dst, flow, in_port, port, tags))
2165 if (port->vlan < 0) {
2166 dst->vlan = m->out_vlan;
2168 if (dst_is_duplicate(dsts, dst - dsts, dst)) {
2172 /* Use the vlan tag on the original flow instead of
2173 * the one passed in the vlan parameter. This ensures
2174 * that we compare the vlan from before any implicit
2175 * tagging tags place. This is necessary because
2176 * dst->vlan is the final vlan, after removing implicit
2178 flow_vlan = ntohs(flow->dl_vlan);
2179 if (flow_vlan == 0) {
2180 flow_vlan = OFP_VLAN_NONE;
2182 if (port == in_port && dst->vlan == flow_vlan) {
2183 /* Don't send out input port on same VLAN. */
2191 mirrors &= mirrors - 1;
2194 partition_dsts(dsts, dst - dsts, ntohs(flow->dl_vlan));
2198 static void OVS_UNUSED
2199 print_dsts(const struct dst *dsts, size_t n)
2201 for (; n--; dsts++) {
2202 printf(">p%"PRIu16, dsts->dp_ifidx);
2203 if (dsts->vlan != OFP_VLAN_NONE) {
2204 printf("v%"PRIu16, dsts->vlan);
2210 compose_actions(struct bridge *br, const flow_t *flow, uint16_t vlan,
2211 const struct port *in_port, const struct port *out_port,
2212 tag_type *tags, struct odp_actions *actions,
2213 uint16_t *nf_output_iface)
2215 struct dst dsts[DP_MAX_PORTS * (MAX_MIRRORS + 1)];
2217 const struct dst *p;
2220 n_dsts = compose_dsts(br, flow, vlan, in_port, out_port, dsts, tags,
2223 cur_vlan = ntohs(flow->dl_vlan);
2224 for (p = dsts; p < &dsts[n_dsts]; p++) {
2225 union odp_action *a;
2226 if (p->vlan != cur_vlan) {
2227 if (p->vlan == OFP_VLAN_NONE) {
2228 odp_actions_add(actions, ODPAT_STRIP_VLAN);
2230 a = odp_actions_add(actions, ODPAT_SET_VLAN_VID);
2231 a->vlan_vid.vlan_vid = htons(p->vlan);
2235 a = odp_actions_add(actions, ODPAT_OUTPUT);
2236 a->output.port = p->dp_ifidx;
2240 /* Returns the effective vlan of a packet, taking into account both the
2241 * 802.1Q header and implicitly tagged ports. A value of 0 indicates that
2242 * the packet is untagged and -1 indicates it has an invalid header and
2243 * should be dropped. */
2244 static int flow_get_vlan(struct bridge *br, const flow_t *flow,
2245 struct port *in_port, bool have_packet)
2247 /* Note that dl_vlan of 0 and of OFP_VLAN_NONE both mean that the packet
2248 * belongs to VLAN 0, so we should treat both cases identically. (In the
2249 * former case, the packet has an 802.1Q header that specifies VLAN 0,
2250 * presumably to allow a priority to be specified. In the latter case, the
2251 * packet does not have any 802.1Q header.) */
2252 int vlan = ntohs(flow->dl_vlan);
2253 if (vlan == OFP_VLAN_NONE) {
2256 if (in_port->vlan >= 0) {
2258 /* XXX support double tagging? */
2260 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2261 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %"PRIu16" tagged "
2262 "packet received on port %s configured with "
2263 "implicit VLAN %"PRIu16,
2264 br->name, ntohs(flow->dl_vlan),
2265 in_port->name, in_port->vlan);
2269 vlan = in_port->vlan;
2271 if (!port_includes_vlan(in_port, vlan)) {
2273 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2274 VLOG_WARN_RL(&rl, "bridge %s: dropping VLAN %d tagged "
2275 "packet received on port %s not configured for "
2277 br->name, vlan, in_port->name, vlan);
2286 /* A VM broadcasts a gratuitous ARP to indicate that it has resumed after
2287 * migration. Older Citrix-patched Linux DomU used gratuitous ARP replies to
2288 * indicate this; newer upstream kernels use gratuitous ARP requests. */
2290 is_gratuitous_arp(const flow_t *flow)
2292 return (flow->dl_type == htons(ETH_TYPE_ARP)
2293 && eth_addr_is_broadcast(flow->dl_dst)
2294 && (flow->nw_proto == ARP_OP_REPLY
2295 || (flow->nw_proto == ARP_OP_REQUEST
2296 && flow->nw_src == flow->nw_dst)));
2300 update_learning_table(struct bridge *br, const flow_t *flow, int vlan,
2301 struct port *in_port)
2303 enum grat_arp_lock_type lock_type;
2306 /* We don't want to learn from gratuitous ARP packets that are reflected
2307 * back over bond slaves so we lock the learning table. */
2308 lock_type = !is_gratuitous_arp(flow) ? GRAT_ARP_LOCK_NONE :
2309 (in_port->n_ifaces == 1) ? GRAT_ARP_LOCK_SET :
2310 GRAT_ARP_LOCK_CHECK;
2312 rev_tag = mac_learning_learn(br->ml, flow->dl_src, vlan, in_port->port_idx,
2315 /* The log messages here could actually be useful in debugging,
2316 * so keep the rate limit relatively high. */
2317 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(30,
2319 VLOG_DBG_RL(&rl, "bridge %s: learned that "ETH_ADDR_FMT" is "
2320 "on port %s in VLAN %d",
2321 br->name, ETH_ADDR_ARGS(flow->dl_src),
2322 in_port->name, vlan);
2323 ofproto_revalidate(br->ofproto, rev_tag);
2327 /* Determines whether packets in 'flow' within 'br' should be forwarded or
2328 * dropped. Returns true if they may be forwarded, false if they should be
2331 * If 'have_packet' is true, it indicates that the caller is processing a
2332 * received packet. If 'have_packet' is false, then the caller is just
2333 * revalidating an existing flow because configuration has changed. Either
2334 * way, 'have_packet' only affects logging (there is no point in logging errors
2335 * during revalidation).
2337 * Sets '*in_portp' to the input port. This will be a null pointer if
2338 * flow->in_port does not designate a known input port (in which case
2339 * is_admissible() returns false).
2341 * When returning true, sets '*vlanp' to the effective VLAN of the input
2342 * packet, as returned by flow_get_vlan().
2344 * May also add tags to '*tags', although the current implementation only does
2345 * so in one special case.
2348 is_admissible(struct bridge *br, const flow_t *flow, bool have_packet,
2349 tag_type *tags, int *vlanp, struct port **in_portp)
2351 struct iface *in_iface;
2352 struct port *in_port;
2355 /* Find the interface and port structure for the received packet. */
2356 in_iface = iface_from_dp_ifidx(br, flow->in_port);
2358 /* No interface? Something fishy... */
2360 /* Odd. A few possible reasons here:
2362 * - We deleted an interface but there are still a few packets
2363 * queued up from it.
2365 * - Someone externally added an interface (e.g. with "ovs-dpctl
2366 * add-if") that we don't know about.
2368 * - Packet arrived on the local port but the local port is not
2369 * one of our bridge ports.
2371 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2373 VLOG_WARN_RL(&rl, "bridge %s: received packet on unknown "
2374 "interface %"PRIu16, br->name, flow->in_port);
2380 *in_portp = in_port = in_iface->port;
2381 *vlanp = vlan = flow_get_vlan(br, flow, in_port, have_packet);
2386 /* Drop frames for reserved multicast addresses. */
2387 if (eth_addr_is_reserved(flow->dl_dst)) {
2391 /* Drop frames on ports reserved for mirroring. */
2392 if (in_port->is_mirror_output_port) {
2394 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2395 VLOG_WARN_RL(&rl, "bridge %s: dropping packet received on port "
2396 "%s, which is reserved exclusively for mirroring",
2397 br->name, in_port->name);
2402 /* Packets received on bonds need special attention to avoid duplicates. */
2403 if (in_port->n_ifaces > 1) {
2405 bool is_grat_arp_locked;
2407 if (eth_addr_is_multicast(flow->dl_dst)) {
2408 *tags |= in_port->active_iface_tag;
2409 if (in_port->active_iface != in_iface->port_ifidx) {
2410 /* Drop all multicast packets on inactive slaves. */
2415 /* Drop all packets for which we have learned a different input
2416 * port, because we probably sent the packet on one slave and got
2417 * it back on the other. Gratuitous ARP packets are an exception
2418 * to this rule: the host has moved to another switch. The exception
2419 * to the exception is if we locked the learning table to avoid
2420 * reflections on bond slaves. If this is the case, just drop the
2422 src_idx = mac_learning_lookup(br->ml, flow->dl_src, vlan,
2423 &is_grat_arp_locked);
2424 if (src_idx != -1 && src_idx != in_port->port_idx &&
2425 (!is_gratuitous_arp(flow) || is_grat_arp_locked)) {
2433 /* If the composed actions may be applied to any packet in the given 'flow',
2434 * returns true. Otherwise, the actions should only be applied to 'packet', or
2435 * not at all, if 'packet' was NULL. */
2437 process_flow(struct bridge *br, const flow_t *flow,
2438 const struct ofpbuf *packet, struct odp_actions *actions,
2439 tag_type *tags, uint16_t *nf_output_iface)
2441 struct port *in_port;
2442 struct port *out_port;
2446 /* Check whether we should drop packets in this flow. */
2447 if (!is_admissible(br, flow, packet != NULL, tags, &vlan, &in_port)) {
2452 /* Learn source MAC (but don't try to learn from revalidation). */
2454 update_learning_table(br, flow, vlan, in_port);
2457 /* Determine output port. */
2458 out_port_idx = mac_learning_lookup_tag(br->ml, flow->dl_dst, vlan, tags,
2460 if (out_port_idx >= 0 && out_port_idx < br->n_ports) {
2461 out_port = br->ports[out_port_idx];
2462 } else if (!packet && !eth_addr_is_multicast(flow->dl_dst)) {
2463 /* If we are revalidating but don't have a learning entry then
2464 * eject the flow. Installing a flow that floods packets opens
2465 * up a window of time where we could learn from a packet reflected
2466 * on a bond and blackhole packets before the learning table is
2467 * updated to reflect the correct port. */
2470 out_port = FLOOD_PORT;
2473 /* Don't send packets out their input ports. */
2474 if (in_port == out_port) {
2480 compose_actions(br, flow, vlan, in_port, out_port, tags, actions,
2487 /* Careful: 'opp' is in host byte order and opp->port_no is an OFP port
2490 bridge_port_changed_ofhook_cb(enum ofp_port_reason reason,
2491 const struct ofp_phy_port *opp,
2494 struct bridge *br = br_;
2495 struct iface *iface;
2498 iface = iface_from_dp_ifidx(br, ofp_port_to_odp_port(opp->port_no));
2504 if (reason == OFPPR_DELETE) {
2505 VLOG_WARN("bridge %s: interface %s deleted unexpectedly",
2506 br->name, iface->name);
2507 iface_destroy(iface);
2508 if (!port->n_ifaces) {
2509 VLOG_WARN("bridge %s: port %s has no interfaces, dropping",
2510 br->name, port->name);
2516 if (port->n_ifaces > 1) {
2517 bool up = !(opp->state & OFPPS_LINK_DOWN);
2518 bond_link_status_update(iface, up);
2519 port_update_bond_compat(port);
2525 bridge_normal_ofhook_cb(const flow_t *flow, const struct ofpbuf *packet,
2526 struct odp_actions *actions, tag_type *tags,
2527 uint16_t *nf_output_iface, void *br_)
2529 struct bridge *br = br_;
2531 COVERAGE_INC(bridge_process_flow);
2533 return process_flow(br, flow, packet, actions, tags, nf_output_iface);
2537 bridge_account_flow_ofhook_cb(const flow_t *flow, tag_type tags,
2538 const union odp_action *actions,
2539 size_t n_actions, unsigned long long int n_bytes,
2542 struct bridge *br = br_;
2543 const union odp_action *a;
2544 struct port *in_port;
2548 /* Feed information from the active flows back into the learning table to
2549 * ensure that table is always in sync with what is actually flowing
2550 * through the datapath.
2552 * We test that 'tags' is nonzero to ensure that only flows that include an
2553 * OFPP_NORMAL action are used for learning. This works because
2554 * bridge_normal_ofhook_cb() always sets a nonzero tag value. */
2555 if (tags && is_admissible(br, flow, false, &dummy, &vlan, &in_port)) {
2556 update_learning_table(br, flow, vlan, in_port);
2559 /* Account for bond slave utilization. */
2560 if (!br->has_bonded_ports) {
2563 for (a = actions; a < &actions[n_actions]; a++) {
2564 if (a->type == ODPAT_OUTPUT) {
2565 struct port *out_port = port_from_dp_ifidx(br, a->output.port);
2566 if (out_port && out_port->n_ifaces >= 2) {
2567 struct bond_entry *e = lookup_bond_entry(out_port,
2569 e->tx_bytes += n_bytes;
2576 bridge_account_checkpoint_ofhook_cb(void *br_)
2578 struct bridge *br = br_;
2582 if (!br->has_bonded_ports) {
2587 for (i = 0; i < br->n_ports; i++) {
2588 struct port *port = br->ports[i];
2589 if (port->n_ifaces > 1 && now >= port->bond_next_rebalance) {
2590 port->bond_next_rebalance = now + port->bond_rebalance_interval;
2591 bond_rebalance_port(port);
2596 static struct ofhooks bridge_ofhooks = {
2597 bridge_port_changed_ofhook_cb,
2598 bridge_normal_ofhook_cb,
2599 bridge_account_flow_ofhook_cb,
2600 bridge_account_checkpoint_ofhook_cb,
2603 /* Bonding functions. */
2605 /* Statistics for a single interface on a bonded port, used for load-based
2606 * bond rebalancing. */
2607 struct slave_balance {
2608 struct iface *iface; /* The interface. */
2609 uint64_t tx_bytes; /* Sum of hashes[*]->tx_bytes. */
2611 /* All the "bond_entry"s that are assigned to this interface, in order of
2612 * increasing tx_bytes. */
2613 struct bond_entry **hashes;
2617 /* Sorts pointers to pointers to bond_entries in ascending order by the
2618 * interface to which they are assigned, and within a single interface in
2619 * ascending order of bytes transmitted. */
2621 compare_bond_entries(const void *a_, const void *b_)
2623 const struct bond_entry *const *ap = a_;
2624 const struct bond_entry *const *bp = b_;
2625 const struct bond_entry *a = *ap;
2626 const struct bond_entry *b = *bp;
2627 if (a->iface_idx != b->iface_idx) {
2628 return a->iface_idx > b->iface_idx ? 1 : -1;
2629 } else if (a->tx_bytes != b->tx_bytes) {
2630 return a->tx_bytes > b->tx_bytes ? 1 : -1;
2636 /* Sorts slave_balances so that enabled ports come first, and otherwise in
2637 * *descending* order by number of bytes transmitted. */
2639 compare_slave_balance(const void *a_, const void *b_)
2641 const struct slave_balance *a = a_;
2642 const struct slave_balance *b = b_;
2643 if (a->iface->enabled != b->iface->enabled) {
2644 return a->iface->enabled ? -1 : 1;
2645 } else if (a->tx_bytes != b->tx_bytes) {
2646 return a->tx_bytes > b->tx_bytes ? -1 : 1;
2653 swap_bals(struct slave_balance *a, struct slave_balance *b)
2655 struct slave_balance tmp = *a;
2660 /* Restores the 'n_bals' slave_balance structures in 'bals' to sorted order
2661 * given that 'p' (and only 'p') might be in the wrong location.
2663 * This function invalidates 'p', since it might now be in a different memory
2666 resort_bals(struct slave_balance *p,
2667 struct slave_balance bals[], size_t n_bals)
2670 for (; p > bals && p->tx_bytes > p[-1].tx_bytes; p--) {
2671 swap_bals(p, p - 1);
2673 for (; p < &bals[n_bals - 1] && p->tx_bytes < p[1].tx_bytes; p++) {
2674 swap_bals(p, p + 1);
2680 log_bals(const struct slave_balance *bals, size_t n_bals, struct port *port)
2682 if (VLOG_IS_DBG_ENABLED()) {
2683 struct ds ds = DS_EMPTY_INITIALIZER;
2684 const struct slave_balance *b;
2686 for (b = bals; b < bals + n_bals; b++) {
2690 ds_put_char(&ds, ',');
2692 ds_put_format(&ds, " %s %"PRIu64"kB",
2693 b->iface->name, b->tx_bytes / 1024);
2695 if (!b->iface->enabled) {
2696 ds_put_cstr(&ds, " (disabled)");
2698 if (b->n_hashes > 0) {
2699 ds_put_cstr(&ds, " (");
2700 for (i = 0; i < b->n_hashes; i++) {
2701 const struct bond_entry *e = b->hashes[i];
2703 ds_put_cstr(&ds, " + ");
2705 ds_put_format(&ds, "h%td: %"PRIu64"kB",
2706 e - port->bond_hash, e->tx_bytes / 1024);
2708 ds_put_cstr(&ds, ")");
2711 VLOG_DBG("bond %s:%s", port->name, ds_cstr(&ds));
2716 /* Shifts 'hash' from 'from' to 'to' within 'port'. */
2718 bond_shift_load(struct slave_balance *from, struct slave_balance *to,
2721 struct bond_entry *hash = from->hashes[hash_idx];
2722 struct port *port = from->iface->port;
2723 uint64_t delta = hash->tx_bytes;
2725 VLOG_INFO("bond %s: shift %"PRIu64"kB of load (with hash %td) "
2726 "from %s to %s (now carrying %"PRIu64"kB and "
2727 "%"PRIu64"kB load, respectively)",
2728 port->name, delta / 1024, hash - port->bond_hash,
2729 from->iface->name, to->iface->name,
2730 (from->tx_bytes - delta) / 1024,
2731 (to->tx_bytes + delta) / 1024);
2733 /* Delete element from from->hashes.
2735 * We don't bother to add the element to to->hashes because not only would
2736 * it require more work, the only purpose it would be to allow that hash to
2737 * be migrated to another slave in this rebalancing run, and there is no
2738 * point in doing that. */
2739 if (hash_idx == 0) {
2742 memmove(from->hashes + hash_idx, from->hashes + hash_idx + 1,
2743 (from->n_hashes - (hash_idx + 1)) * sizeof *from->hashes);
2747 /* Shift load away from 'from' to 'to'. */
2748 from->tx_bytes -= delta;
2749 to->tx_bytes += delta;
2751 /* Arrange for flows to be revalidated. */
2752 ofproto_revalidate(port->bridge->ofproto, hash->iface_tag);
2753 hash->iface_idx = to->iface->port_ifidx;
2754 hash->iface_tag = tag_create_random();
2758 bond_rebalance_port(struct port *port)
2760 struct slave_balance bals[DP_MAX_PORTS];
2762 struct bond_entry *hashes[BOND_MASK + 1];
2763 struct slave_balance *b, *from, *to;
2764 struct bond_entry *e;
2767 /* Sets up 'bals' to describe each of the port's interfaces, sorted in
2768 * descending order of tx_bytes, so that bals[0] represents the most
2769 * heavily loaded slave and bals[n_bals - 1] represents the least heavily
2772 * The code is a bit tricky: to avoid dynamically allocating a 'hashes'
2773 * array for each slave_balance structure, we sort our local array of
2774 * hashes in order by slave, so that all of the hashes for a given slave
2775 * become contiguous in memory, and then we point each 'hashes' members of
2776 * a slave_balance structure to the start of a contiguous group. */
2777 n_bals = port->n_ifaces;
2778 for (b = bals; b < &bals[n_bals]; b++) {
2779 b->iface = port->ifaces[b - bals];
2784 for (i = 0; i <= BOND_MASK; i++) {
2785 hashes[i] = &port->bond_hash[i];
2787 qsort(hashes, BOND_MASK + 1, sizeof *hashes, compare_bond_entries);
2788 for (i = 0; i <= BOND_MASK; i++) {
2790 if (e->iface_idx >= 0 && e->iface_idx < port->n_ifaces) {
2791 b = &bals[e->iface_idx];
2792 b->tx_bytes += e->tx_bytes;
2794 b->hashes = &hashes[i];
2799 qsort(bals, n_bals, sizeof *bals, compare_slave_balance);
2800 log_bals(bals, n_bals, port);
2802 /* Discard slaves that aren't enabled (which were sorted to the back of the
2803 * array earlier). */
2804 while (!bals[n_bals - 1].iface->enabled) {
2811 /* Shift load from the most-loaded slaves to the least-loaded slaves. */
2812 to = &bals[n_bals - 1];
2813 for (from = bals; from < to; ) {
2814 uint64_t overload = from->tx_bytes - to->tx_bytes;
2815 if (overload < to->tx_bytes >> 5 || overload < 100000) {
2816 /* The extra load on 'from' (and all less-loaded slaves), compared
2817 * to that of 'to' (the least-loaded slave), is less than ~3%, or
2818 * it is less than ~1Mbps. No point in rebalancing. */
2820 } else if (from->n_hashes == 1) {
2821 /* 'from' only carries a single MAC hash, so we can't shift any
2822 * load away from it, even though we want to. */
2825 /* 'from' is carrying significantly more load than 'to', and that
2826 * load is split across at least two different hashes. Pick a hash
2827 * to migrate to 'to' (the least-loaded slave), given that doing so
2828 * must decrease the ratio of the load on the two slaves by at
2831 * The sort order we use means that we prefer to shift away the
2832 * smallest hashes instead of the biggest ones. There is little
2833 * reason behind this decision; we could use the opposite sort
2834 * order to shift away big hashes ahead of small ones. */
2838 for (i = 0; i < from->n_hashes; i++) {
2839 double old_ratio, new_ratio;
2840 uint64_t delta = from->hashes[i]->tx_bytes;
2842 if (delta == 0 || from->tx_bytes - delta == 0) {
2843 /* Pointless move. */
2847 order_swapped = from->tx_bytes - delta < to->tx_bytes + delta;
2849 if (to->tx_bytes == 0) {
2850 /* Nothing on the new slave, move it. */
2854 old_ratio = (double)from->tx_bytes / to->tx_bytes;
2855 new_ratio = (double)(from->tx_bytes - delta) /
2856 (to->tx_bytes + delta);
2858 if (new_ratio == 0) {
2859 /* Should already be covered but check to prevent division
2864 if (new_ratio < 1) {
2865 new_ratio = 1 / new_ratio;
2868 if (old_ratio - new_ratio > 0.1) {
2869 /* Would decrease the ratio, move it. */
2873 if (i < from->n_hashes) {
2874 bond_shift_load(from, to, i);
2875 port->bond_compat_is_stale = true;
2877 /* If the result of the migration changed the relative order of
2878 * 'from' and 'to' swap them back to maintain invariants. */
2879 if (order_swapped) {
2880 swap_bals(from, to);
2883 /* Re-sort 'bals'. Note that this may make 'from' and 'to'
2884 * point to different slave_balance structures. It is only
2885 * valid to do these two operations in a row at all because we
2886 * know that 'from' will not move past 'to' and vice versa. */
2887 resort_bals(from, bals, n_bals);
2888 resort_bals(to, bals, n_bals);
2895 /* Implement exponentially weighted moving average. A weight of 1/2 causes
2896 * historical data to decay to <1% in 7 rebalancing runs. */
2897 for (e = &port->bond_hash[0]; e <= &port->bond_hash[BOND_MASK]; e++) {
2903 bond_send_learning_packets(struct port *port)
2905 struct bridge *br = port->bridge;
2906 struct mac_entry *e;
2907 struct ofpbuf packet;
2908 int error, n_packets, n_errors;
2910 if (!port->n_ifaces || port->active_iface < 0) {
2914 ofpbuf_init(&packet, 128);
2915 error = n_packets = n_errors = 0;
2916 LIST_FOR_EACH (e, struct mac_entry, lru_node, &br->ml->lrus) {
2917 union ofp_action actions[2], *a;
2923 if (e->port == port->port_idx
2924 || !choose_output_iface(port, e->mac, &dp_ifidx, &tags)) {
2928 /* Compose actions. */
2929 memset(actions, 0, sizeof actions);
2932 a->vlan_vid.type = htons(OFPAT_SET_VLAN_VID);
2933 a->vlan_vid.len = htons(sizeof *a);
2934 a->vlan_vid.vlan_vid = htons(e->vlan);
2937 a->output.type = htons(OFPAT_OUTPUT);
2938 a->output.len = htons(sizeof *a);
2939 a->output.port = htons(odp_port_to_ofp_port(dp_ifidx));
2944 compose_benign_packet(&packet, "Open vSwitch Bond Failover", 0xf177,
2946 flow_extract(&packet, 0, ODPP_NONE, &flow);
2947 retval = ofproto_send_packet(br->ofproto, &flow, actions, a - actions,
2954 ofpbuf_uninit(&packet);
2957 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
2958 VLOG_WARN_RL(&rl, "bond %s: %d errors sending %d gratuitous learning "
2959 "packets, last error was: %s",
2960 port->name, n_errors, n_packets, strerror(error));
2962 VLOG_DBG("bond %s: sent %d gratuitous learning packets",
2963 port->name, n_packets);
2967 /* Bonding unixctl user interface functions. */
2970 bond_unixctl_list(struct unixctl_conn *conn,
2971 const char *args OVS_UNUSED, void *aux OVS_UNUSED)
2973 struct ds ds = DS_EMPTY_INITIALIZER;
2974 const struct bridge *br;
2976 ds_put_cstr(&ds, "bridge\tbond\tslaves\n");
2978 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
2981 for (i = 0; i < br->n_ports; i++) {
2982 const struct port *port = br->ports[i];
2983 if (port->n_ifaces > 1) {
2986 ds_put_format(&ds, "%s\t%s\t", br->name, port->name);
2987 for (j = 0; j < port->n_ifaces; j++) {
2988 const struct iface *iface = port->ifaces[j];
2990 ds_put_cstr(&ds, ", ");
2992 ds_put_cstr(&ds, iface->name);
2994 ds_put_char(&ds, '\n');
2998 unixctl_command_reply(conn, 200, ds_cstr(&ds));
3002 static struct port *
3003 bond_find(const char *name)
3005 const struct bridge *br;
3007 LIST_FOR_EACH (br, struct bridge, node, &all_bridges) {
3010 for (i = 0; i < br->n_ports; i++) {
3011 struct port *port = br->ports[i];
3012 if (!strcmp(port->name, name) && port->n_ifaces > 1) {
3021 bond_unixctl_show(struct unixctl_conn *conn,
3022 const char *args, void *aux OVS_UNUSED)
3024 struct ds ds = DS_EMPTY_INITIALIZER;
3025 const struct port *port;
3028 port = bond_find(args);
3030 unixctl_command_reply(conn, 501, "no such bond");
3034 ds_put_format(&ds, "updelay: %d ms\n", port->updelay);
3035 ds_put_format(&ds, "downdelay: %d ms\n", port->downdelay);
3036 ds_put_format(&ds, "next rebalance: %lld ms\n",
3037 port->bond_next_rebalance - time_msec());
3038 for (j = 0; j < port->n_ifaces; j++) {
3039 const struct iface *iface = port->ifaces[j];
3040 struct bond_entry *be;
3043 ds_put_format(&ds, "slave %s: %s\n",
3044 iface->name, iface->enabled ? "enabled" : "disabled");
3045 if (j == port->active_iface) {
3046 ds_put_cstr(&ds, "\tactive slave\n");
3048 if (iface->delay_expires != LLONG_MAX) {
3049 ds_put_format(&ds, "\t%s expires in %lld ms\n",
3050 iface->enabled ? "downdelay" : "updelay",
3051 iface->delay_expires - time_msec());
3055 for (be = port->bond_hash; be <= &port->bond_hash[BOND_MASK]; be++) {
3056 int hash = be - port->bond_hash;
3057 struct mac_entry *me;
3059 if (be->iface_idx != j) {
3063 ds_put_format(&ds, "\thash %d: %"PRIu64" kB load\n",
3064 hash, be->tx_bytes / 1024);
3067 LIST_FOR_EACH (me, struct mac_entry, lru_node,
3068 &port->bridge->ml->lrus) {
3071 if (bond_hash(me->mac) == hash
3072 && me->port != port->port_idx
3073 && choose_output_iface(port, me->mac, &dp_ifidx, &tags)
3074 && dp_ifidx == iface->dp_ifidx)
3076 ds_put_format(&ds, "\t\t"ETH_ADDR_FMT"\n",
3077 ETH_ADDR_ARGS(me->mac));
3082 unixctl_command_reply(conn, 200, ds_cstr(&ds));
3087 bond_unixctl_migrate(struct unixctl_conn *conn, const char *args_,
3088 void *aux OVS_UNUSED)
3090 char *args = (char *) args_;
3091 char *save_ptr = NULL;
3092 char *bond_s, *hash_s, *slave_s;
3093 uint8_t mac[ETH_ADDR_LEN];
3095 struct iface *iface;
3096 struct bond_entry *entry;
3099 bond_s = strtok_r(args, " ", &save_ptr);
3100 hash_s = strtok_r(NULL, " ", &save_ptr);
3101 slave_s = strtok_r(NULL, " ", &save_ptr);
3103 unixctl_command_reply(conn, 501,
3104 "usage: bond/migrate BOND HASH SLAVE");
3108 port = bond_find(bond_s);
3110 unixctl_command_reply(conn, 501, "no such bond");
3114 if (sscanf(hash_s, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
3115 == ETH_ADDR_SCAN_COUNT) {
3116 hash = bond_hash(mac);
3117 } else if (strspn(hash_s, "0123456789") == strlen(hash_s)) {
3118 hash = atoi(hash_s) & BOND_MASK;
3120 unixctl_command_reply(conn, 501, "bad hash");
3124 iface = port_lookup_iface(port, slave_s);
3126 unixctl_command_reply(conn, 501, "no such slave");
3130 if (!iface->enabled) {
3131 unixctl_command_reply(conn, 501, "cannot migrate to disabled slave");
3135 entry = &port->bond_hash[hash];
3136 ofproto_revalidate(port->bridge->ofproto, entry->iface_tag);
3137 entry->iface_idx = iface->port_ifidx;
3138 entry->iface_tag = tag_create_random();
3139 port->bond_compat_is_stale = true;
3140 unixctl_command_reply(conn, 200, "migrated");
3144 bond_unixctl_set_active_slave(struct unixctl_conn *conn, const char *args_,
3145 void *aux OVS_UNUSED)
3147 char *args = (char *) args_;
3148 char *save_ptr = NULL;
3149 char *bond_s, *slave_s;
3151 struct iface *iface;
3153 bond_s = strtok_r(args, " ", &save_ptr);
3154 slave_s = strtok_r(NULL, " ", &save_ptr);
3156 unixctl_command_reply(conn, 501,
3157 "usage: bond/set-active-slave BOND SLAVE");
3161 port = bond_find(bond_s);
3163 unixctl_command_reply(conn, 501, "no such bond");
3167 iface = port_lookup_iface(port, slave_s);
3169 unixctl_command_reply(conn, 501, "no such slave");
3173 if (!iface->enabled) {
3174 unixctl_command_reply(conn, 501, "cannot make disabled slave active");
3178 if (port->active_iface != iface->port_ifidx) {
3179 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
3180 port->active_iface = iface->port_ifidx;
3181 port->active_iface_tag = tag_create_random();
3182 VLOG_INFO("port %s: active interface is now %s",
3183 port->name, iface->name);
3184 bond_send_learning_packets(port);
3185 unixctl_command_reply(conn, 200, "done");
3187 unixctl_command_reply(conn, 200, "no change");
3192 enable_slave(struct unixctl_conn *conn, const char *args_, bool enable)
3194 char *args = (char *) args_;
3195 char *save_ptr = NULL;
3196 char *bond_s, *slave_s;
3198 struct iface *iface;
3200 bond_s = strtok_r(args, " ", &save_ptr);
3201 slave_s = strtok_r(NULL, " ", &save_ptr);
3203 unixctl_command_reply(conn, 501,
3204 "usage: bond/enable/disable-slave BOND SLAVE");
3208 port = bond_find(bond_s);
3210 unixctl_command_reply(conn, 501, "no such bond");
3214 iface = port_lookup_iface(port, slave_s);
3216 unixctl_command_reply(conn, 501, "no such slave");
3220 bond_enable_slave(iface, enable);
3221 unixctl_command_reply(conn, 501, enable ? "enabled" : "disabled");
3225 bond_unixctl_enable_slave(struct unixctl_conn *conn, const char *args,
3226 void *aux OVS_UNUSED)
3228 enable_slave(conn, args, true);
3232 bond_unixctl_disable_slave(struct unixctl_conn *conn, const char *args,
3233 void *aux OVS_UNUSED)
3235 enable_slave(conn, args, false);
3239 bond_unixctl_hash(struct unixctl_conn *conn, const char *args,
3240 void *aux OVS_UNUSED)
3242 uint8_t mac[ETH_ADDR_LEN];
3246 if (sscanf(args, ETH_ADDR_SCAN_FMT, ETH_ADDR_SCAN_ARGS(mac))
3247 == ETH_ADDR_SCAN_COUNT) {
3248 hash = bond_hash(mac);
3250 hash_cstr = xasprintf("%u", hash);
3251 unixctl_command_reply(conn, 200, hash_cstr);
3254 unixctl_command_reply(conn, 501, "invalid mac");
3261 unixctl_command_register("bond/list", bond_unixctl_list, NULL);
3262 unixctl_command_register("bond/show", bond_unixctl_show, NULL);
3263 unixctl_command_register("bond/migrate", bond_unixctl_migrate, NULL);
3264 unixctl_command_register("bond/set-active-slave",
3265 bond_unixctl_set_active_slave, NULL);
3266 unixctl_command_register("bond/enable-slave", bond_unixctl_enable_slave,
3268 unixctl_command_register("bond/disable-slave", bond_unixctl_disable_slave,
3270 unixctl_command_register("bond/hash", bond_unixctl_hash, NULL);
3273 /* Port functions. */
3275 static struct port *
3276 port_create(struct bridge *br, const char *name)
3280 port = xzalloc(sizeof *port);
3282 port->port_idx = br->n_ports;
3284 port->trunks = NULL;
3285 port->name = xstrdup(name);
3286 port->active_iface = -1;
3288 if (br->n_ports >= br->allocated_ports) {
3289 br->ports = x2nrealloc(br->ports, &br->allocated_ports,
3292 br->ports[br->n_ports++] = port;
3293 shash_add_assert(&br->port_by_name, port->name, port);
3295 VLOG_INFO("created port %s on bridge %s", port->name, br->name);
3302 get_port_other_config(const struct ovsrec_port *port, const char *key,
3303 const char *default_value)
3307 value = get_ovsrec_key_value(&port->header_, &ovsrec_port_col_other_config,
3309 return value ? value : default_value;
3313 port_del_ifaces(struct port *port, const struct ovsrec_port *cfg)
3315 struct shash new_ifaces;
3318 /* Collect list of new interfaces. */
3319 shash_init(&new_ifaces);
3320 for (i = 0; i < cfg->n_interfaces; i++) {
3321 const char *name = cfg->interfaces[i]->name;
3322 shash_add_once(&new_ifaces, name, NULL);
3325 /* Get rid of deleted interfaces. */
3326 for (i = 0; i < port->n_ifaces; ) {
3327 if (!shash_find(&new_ifaces, cfg->interfaces[i]->name)) {
3328 iface_destroy(port->ifaces[i]);
3334 shash_destroy(&new_ifaces);
3338 port_reconfigure(struct port *port, const struct ovsrec_port *cfg)
3340 struct shash new_ifaces;
3341 long long int next_rebalance;
3342 unsigned long *trunks;
3348 /* Update settings. */
3349 port->updelay = cfg->bond_updelay;
3350 if (port->updelay < 0) {
3353 port->downdelay = cfg->bond_downdelay;
3354 if (port->downdelay < 0) {
3355 port->downdelay = 0;
3357 port->bond_rebalance_interval = atoi(
3358 get_port_other_config(cfg, "bond-rebalance-interval", "10000"));
3359 if (port->bond_rebalance_interval < 1000) {
3360 port->bond_rebalance_interval = 1000;
3362 next_rebalance = time_msec() + port->bond_rebalance_interval;
3363 if (port->bond_next_rebalance > next_rebalance) {
3364 port->bond_next_rebalance = next_rebalance;
3367 /* Add new interfaces and update 'cfg' member of existing ones. */
3368 shash_init(&new_ifaces);
3369 for (i = 0; i < cfg->n_interfaces; i++) {
3370 const struct ovsrec_interface *if_cfg = cfg->interfaces[i];
3371 struct iface *iface;
3373 if (!shash_add_once(&new_ifaces, if_cfg->name, NULL)) {
3374 VLOG_WARN("port %s: %s specified twice as port interface",
3375 port->name, if_cfg->name);
3379 iface = iface_lookup(port->bridge, if_cfg->name);
3381 if (iface->port != port) {
3382 VLOG_ERR("bridge %s: %s interface is on multiple ports, "
3384 port->bridge->name, if_cfg->name, iface->port->name);
3387 iface->cfg = if_cfg;
3389 iface_create(port, if_cfg);
3392 shash_destroy(&new_ifaces);
3397 if (port->n_ifaces < 2) {
3399 if (vlan >= 0 && vlan <= 4095) {
3400 VLOG_DBG("port %s: assigning VLAN tag %d", port->name, vlan);
3405 /* It's possible that bonded, VLAN-tagged ports make sense. Maybe
3406 * they even work as-is. But they have not been tested. */
3407 VLOG_WARN("port %s: VLAN tags not supported on bonded ports",
3411 if (port->vlan != vlan) {
3413 bridge_flush(port->bridge);
3416 /* Get trunked VLANs. */
3418 if (vlan < 0 && cfg->n_trunks) {
3422 trunks = bitmap_allocate(4096);
3424 for (i = 0; i < cfg->n_trunks; i++) {
3425 int trunk = cfg->trunks[i];
3427 bitmap_set1(trunks, trunk);
3433 VLOG_ERR("port %s: invalid values for %zu trunk VLANs",
3434 port->name, cfg->n_trunks);
3436 if (n_errors == cfg->n_trunks) {
3437 VLOG_ERR("port %s: no valid trunks, trunking all VLANs",
3439 bitmap_free(trunks);
3442 } else if (vlan >= 0 && cfg->n_trunks) {
3443 VLOG_ERR("port %s: ignoring trunks in favor of implicit vlan",
3447 ? port->trunks != NULL
3448 : port->trunks == NULL || !bitmap_equal(trunks, port->trunks, 4096)) {
3449 bridge_flush(port->bridge);
3451 bitmap_free(port->trunks);
3452 port->trunks = trunks;
3456 port_destroy(struct port *port)
3459 struct bridge *br = port->bridge;
3463 proc_net_compat_update_vlan(port->name, NULL, 0);
3464 proc_net_compat_update_bond(port->name, NULL);
3466 for (i = 0; i < MAX_MIRRORS; i++) {
3467 struct mirror *m = br->mirrors[i];
3468 if (m && m->out_port == port) {
3473 while (port->n_ifaces > 0) {
3474 iface_destroy(port->ifaces[port->n_ifaces - 1]);
3477 shash_find_and_delete_assert(&br->port_by_name, port->name);
3479 del = br->ports[port->port_idx] = br->ports[--br->n_ports];
3480 del->port_idx = port->port_idx;
3483 bitmap_free(port->trunks);
3490 static struct port *
3491 port_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
3493 struct iface *iface = iface_from_dp_ifidx(br, dp_ifidx);
3494 return iface ? iface->port : NULL;
3497 static struct port *
3498 port_lookup(const struct bridge *br, const char *name)
3500 return shash_find_data(&br->port_by_name, name);
3503 static struct iface *
3504 port_lookup_iface(const struct port *port, const char *name)
3506 struct iface *iface = iface_lookup(port->bridge, name);
3507 return iface && iface->port == port ? iface : NULL;
3511 port_update_bonding(struct port *port)
3513 if (port->n_ifaces < 2) {
3514 /* Not a bonded port. */
3515 if (port->bond_hash) {
3516 free(port->bond_hash);
3517 port->bond_hash = NULL;
3518 port->bond_compat_is_stale = true;
3519 port->bond_fake_iface = false;
3522 if (!port->bond_hash) {
3525 port->bond_hash = xcalloc(BOND_MASK + 1, sizeof *port->bond_hash);
3526 for (i = 0; i <= BOND_MASK; i++) {
3527 struct bond_entry *e = &port->bond_hash[i];
3531 port->no_ifaces_tag = tag_create_random();
3532 bond_choose_active_iface(port);
3533 port->bond_next_rebalance
3534 = time_msec() + port->bond_rebalance_interval;
3536 if (port->cfg->bond_fake_iface) {
3537 port->bond_next_fake_iface_update = time_msec();
3540 port->bond_compat_is_stale = true;
3541 port->bond_fake_iface = port->cfg->bond_fake_iface;
3546 port_update_bond_compat(struct port *port)
3548 struct compat_bond_hash compat_hashes[BOND_MASK + 1];
3549 struct compat_bond bond;
3552 if (port->n_ifaces < 2) {
3553 proc_net_compat_update_bond(port->name, NULL);
3558 bond.updelay = port->updelay;
3559 bond.downdelay = port->downdelay;
3562 bond.hashes = compat_hashes;
3563 if (port->bond_hash) {
3564 const struct bond_entry *e;
3565 for (e = port->bond_hash; e <= &port->bond_hash[BOND_MASK]; e++) {
3566 if (e->iface_idx >= 0 && e->iface_idx < port->n_ifaces) {
3567 struct compat_bond_hash *cbh = &bond.hashes[bond.n_hashes++];
3568 cbh->hash = e - port->bond_hash;
3569 cbh->netdev_name = port->ifaces[e->iface_idx]->name;
3574 bond.n_slaves = port->n_ifaces;
3575 bond.slaves = xmalloc(port->n_ifaces * sizeof *bond.slaves);
3576 for (i = 0; i < port->n_ifaces; i++) {
3577 struct iface *iface = port->ifaces[i];
3578 struct compat_bond_slave *slave = &bond.slaves[i];
3579 slave->name = iface->name;
3581 /* We need to make the same determination as the Linux bonding
3582 * code to determine whether a slave should be consider "up".
3583 * The Linux function bond_miimon_inspect() supports four
3584 * BOND_LINK_* states:
3586 * - BOND_LINK_UP: carrier detected, updelay has passed.
3587 * - BOND_LINK_FAIL: carrier lost, downdelay in progress.
3588 * - BOND_LINK_DOWN: carrier lost, downdelay has passed.
3589 * - BOND_LINK_BACK: carrier detected, updelay in progress.
3591 * The function bond_info_show_slave() only considers BOND_LINK_UP
3592 * to be "up" and anything else to be "down".
3594 slave->up = iface->enabled && iface->delay_expires == LLONG_MAX;
3598 netdev_get_etheraddr(iface->netdev, slave->mac);
3601 if (port->bond_fake_iface) {
3602 struct netdev *bond_netdev;
3604 if (!netdev_open_default(port->name, &bond_netdev)) {
3606 netdev_turn_flags_on(bond_netdev, NETDEV_UP, true);
3608 netdev_turn_flags_off(bond_netdev, NETDEV_UP, true);
3610 netdev_close(bond_netdev);
3614 proc_net_compat_update_bond(port->name, &bond);
3619 port_update_vlan_compat(struct port *port)
3621 struct bridge *br = port->bridge;
3622 char *vlandev_name = NULL;
3624 if (port->vlan > 0) {
3625 /* Figure out the name that the VLAN device should actually have, if it
3626 * existed. This takes some work because the VLAN device would not
3627 * have port->name in its name; rather, it would have the trunk port's
3628 * name, and 'port' would be attached to a bridge that also had the
3629 * VLAN device one of its ports. So we need to find a trunk port that
3630 * includes port->vlan.
3632 * There might be more than one candidate. This doesn't happen on
3633 * XenServer, so if it happens we just pick the first choice in
3634 * alphabetical order instead of creating multiple VLAN devices. */
3636 for (i = 0; i < br->n_ports; i++) {
3637 struct port *p = br->ports[i];
3638 if (port_trunks_vlan(p, port->vlan)
3640 && (!vlandev_name || strcmp(p->name, vlandev_name) <= 0))
3642 uint8_t ea[ETH_ADDR_LEN];
3643 netdev_get_etheraddr(p->ifaces[0]->netdev, ea);
3644 if (!eth_addr_is_multicast(ea) &&
3645 !eth_addr_is_reserved(ea) &&
3646 !eth_addr_is_zero(ea)) {
3647 vlandev_name = p->name;
3652 proc_net_compat_update_vlan(port->name, vlandev_name, port->vlan);
3655 /* Interface functions. */
3657 static struct iface *
3658 iface_create(struct port *port, const struct ovsrec_interface *if_cfg)
3660 struct bridge *br = port->bridge;
3661 struct iface *iface;
3662 char *name = if_cfg->name;
3665 iface = xzalloc(sizeof *iface);
3667 iface->port_ifidx = port->n_ifaces;
3668 iface->name = xstrdup(name);
3669 iface->dp_ifidx = -1;
3670 iface->tag = tag_create_random();
3671 iface->delay_expires = LLONG_MAX;
3672 iface->netdev = NULL;
3673 iface->cfg = if_cfg;
3675 shash_add_assert(&br->iface_by_name, iface->name, iface);
3677 /* Attempt to create the network interface in case it doesn't exist yet. */
3678 if (!iface_is_internal(br, iface->name)) {
3679 error = set_up_iface(if_cfg, iface, true);
3681 VLOG_WARN("could not create iface %s: %s", iface->name,
3684 shash_find_and_delete_assert(&br->iface_by_name, iface->name);
3691 if (port->n_ifaces >= port->allocated_ifaces) {
3692 port->ifaces = x2nrealloc(port->ifaces, &port->allocated_ifaces,
3693 sizeof *port->ifaces);
3695 port->ifaces[port->n_ifaces++] = iface;
3696 if (port->n_ifaces > 1) {
3697 br->has_bonded_ports = true;
3700 VLOG_DBG("attached network device %s to port %s", iface->name, port->name);
3708 iface_destroy(struct iface *iface)
3711 struct port *port = iface->port;
3712 struct bridge *br = port->bridge;
3713 bool del_active = port->active_iface == iface->port_ifidx;
3716 shash_find_and_delete_assert(&br->iface_by_name, iface->name);
3718 if (iface->dp_ifidx >= 0) {
3719 port_array_set(&br->ifaces, iface->dp_ifidx, NULL);
3722 del = port->ifaces[iface->port_ifidx] = port->ifaces[--port->n_ifaces];
3723 del->port_ifidx = iface->port_ifidx;
3725 netdev_close(iface->netdev);
3728 ofproto_revalidate(port->bridge->ofproto, port->active_iface_tag);
3729 bond_choose_active_iface(port);
3730 bond_send_learning_packets(port);
3736 bridge_flush(port->bridge);
3740 static struct iface *
3741 iface_lookup(const struct bridge *br, const char *name)
3743 return shash_find_data(&br->iface_by_name, name);
3746 static struct iface *
3747 iface_from_dp_ifidx(const struct bridge *br, uint16_t dp_ifidx)
3749 return port_array_get(&br->ifaces, dp_ifidx);
3752 /* Returns true if 'iface' is the name of an "internal" interface on bridge
3753 * 'br', that is, an interface that is entirely simulated within the datapath.
3754 * The local port (ODPP_LOCAL) is always an internal interface. Other local
3755 * interfaces are created by setting "iface.<iface>.internal = true".
3757 * In addition, we have a kluge-y feature that creates an internal port with
3758 * the name of a bonded port if "bonding.<bondname>.fake-iface = true" is set.
3759 * This feature needs to go away in the long term. Until then, this is one
3760 * reason why this function takes a name instead of a struct iface: the fake
3761 * interfaces created this way do not have a struct iface. */
3763 iface_is_internal(const struct bridge *br, const char *if_name)
3765 struct iface *iface;
3768 if (!strcmp(if_name, br->name)) {
3772 iface = iface_lookup(br, if_name);
3773 if (iface && !strcmp(iface->cfg->type, "internal")) {
3777 port = port_lookup(br, if_name);
3778 if (port && port->n_ifaces > 1 && port->cfg->bond_fake_iface) {
3784 /* Set Ethernet address of 'iface', if one is specified in the configuration
3787 iface_set_mac(struct iface *iface)
3789 uint8_t ea[ETH_ADDR_LEN];
3791 if (iface->cfg->mac && eth_addr_from_string(iface->cfg->mac, ea)) {
3792 if (eth_addr_is_multicast(ea)) {
3793 VLOG_ERR("interface %s: cannot set MAC to multicast address",
3795 } else if (iface->dp_ifidx == ODPP_LOCAL) {
3796 VLOG_ERR("ignoring iface.%s.mac; use bridge.%s.mac instead",
3797 iface->name, iface->name);
3799 int error = netdev_set_etheraddr(iface->netdev, ea);
3801 VLOG_ERR("interface %s: setting MAC failed (%s)",
3802 iface->name, strerror(error));
3809 shash_from_ovs_idl_map(char **keys, char **values, size_t n,
3810 struct shash *shash)
3815 for (i = 0; i < n; i++) {
3816 shash_add(shash, keys[i], values[i]);
3820 struct iface_delete_queues_cbdata {
3821 struct netdev *netdev;
3822 const struct ovsdb_datum *queues;
3826 queue_ids_include(const struct ovsdb_datum *queues, int64_t target)
3828 union ovsdb_atom atom;
3830 atom.integer = target;
3831 return ovsdb_datum_find_key(queues, &atom, OVSDB_TYPE_INTEGER) != UINT_MAX;
3835 iface_delete_queues(unsigned int queue_id,
3836 const struct shash *details OVS_UNUSED, void *cbdata_)
3838 struct iface_delete_queues_cbdata *cbdata = cbdata_;
3840 if (!queue_ids_include(cbdata->queues, queue_id)) {
3841 netdev_delete_queue(cbdata->netdev, queue_id);
3846 iface_update_qos(struct iface *iface, const struct ovsrec_qos *qos)
3848 if (!qos || qos->type[0] == '\0') {
3849 netdev_set_qos(iface->netdev, NULL, NULL);
3851 struct iface_delete_queues_cbdata cbdata;
3852 struct shash details;
3855 /* Configure top-level Qos for 'iface'. */
3856 shash_from_ovs_idl_map(qos->key_other_config, qos->value_other_config,
3857 qos->n_other_config, &details);
3858 netdev_set_qos(iface->netdev, qos->type, &details);
3859 shash_destroy(&details);
3861 /* Deconfigure queues that were deleted. */
3862 cbdata.netdev = iface->netdev;
3863 cbdata.queues = ovsrec_qos_get_queues(qos, OVSDB_TYPE_INTEGER,
3865 netdev_dump_queues(iface->netdev, iface_delete_queues, &cbdata);
3867 /* Configure queues for 'iface'. */
3868 for (i = 0; i < qos->n_queues; i++) {
3869 const struct ovsrec_queue *queue = qos->value_queues[i];
3870 unsigned int queue_id = qos->key_queues[i];
3872 shash_from_ovs_idl_map(queue->key_other_config,
3873 queue->value_other_config,
3874 queue->n_other_config, &details);
3875 netdev_set_queue(iface->netdev, queue_id, &details);
3876 shash_destroy(&details);
3881 /* Port mirroring. */
3883 static struct mirror *
3884 mirror_find_by_uuid(struct bridge *br, const struct uuid *uuid)
3888 for (i = 0; i < MAX_MIRRORS; i++) {
3889 struct mirror *m = br->mirrors[i];
3890 if (m && uuid_equals(uuid, &m->uuid)) {
3898 mirror_reconfigure(struct bridge *br)
3900 unsigned long *rspan_vlans;
3903 /* Get rid of deleted mirrors. */
3904 for (i = 0; i < MAX_MIRRORS; i++) {
3905 struct mirror *m = br->mirrors[i];
3907 const struct ovsdb_datum *mc;
3908 union ovsdb_atom atom;
3910 mc = ovsrec_bridge_get_mirrors(br->cfg, OVSDB_TYPE_UUID);
3911 atom.uuid = br->mirrors[i]->uuid;
3912 if (ovsdb_datum_find_key(mc, &atom, OVSDB_TYPE_UUID) == UINT_MAX) {
3918 /* Add new mirrors and reconfigure existing ones. */
3919 for (i = 0; i < br->cfg->n_mirrors; i++) {
3920 struct ovsrec_mirror *cfg = br->cfg->mirrors[i];
3921 struct mirror *m = mirror_find_by_uuid(br, &cfg->header_.uuid);
3923 mirror_reconfigure_one(m, cfg);
3925 mirror_create(br, cfg);
3929 /* Update port reserved status. */
3930 for (i = 0; i < br->n_ports; i++) {
3931 br->ports[i]->is_mirror_output_port = false;
3933 for (i = 0; i < MAX_MIRRORS; i++) {
3934 struct mirror *m = br->mirrors[i];
3935 if (m && m->out_port) {
3936 m->out_port->is_mirror_output_port = true;
3940 /* Update flooded vlans (for RSPAN). */
3942 if (br->cfg->n_flood_vlans) {
3943 rspan_vlans = bitmap_allocate(4096);
3945 for (i = 0; i < br->cfg->n_flood_vlans; i++) {
3946 int64_t vlan = br->cfg->flood_vlans[i];
3947 if (vlan >= 0 && vlan < 4096) {
3948 bitmap_set1(rspan_vlans, vlan);
3949 VLOG_INFO("bridge %s: disabling learning on vlan %"PRId64,
3952 VLOG_ERR("bridge %s: invalid value %"PRId64 "for flood VLAN",
3957 if (mac_learning_set_flood_vlans(br->ml, rspan_vlans)) {
3963 mirror_create(struct bridge *br, struct ovsrec_mirror *cfg)
3968 for (i = 0; ; i++) {
3969 if (i >= MAX_MIRRORS) {
3970 VLOG_WARN("bridge %s: maximum of %d port mirrors reached, "
3971 "cannot create %s", br->name, MAX_MIRRORS, cfg->name);
3974 if (!br->mirrors[i]) {
3979 VLOG_INFO("created port mirror %s on bridge %s", cfg->name, br->name);
3982 br->mirrors[i] = m = xzalloc(sizeof *m);
3985 m->name = xstrdup(cfg->name);
3986 shash_init(&m->src_ports);
3987 shash_init(&m->dst_ports);
3993 mirror_reconfigure_one(m, cfg);
3997 mirror_destroy(struct mirror *m)
4000 struct bridge *br = m->bridge;
4003 for (i = 0; i < br->n_ports; i++) {
4004 br->ports[i]->src_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
4005 br->ports[i]->dst_mirrors &= ~(MIRROR_MASK_C(1) << m->idx);
4008 shash_destroy(&m->src_ports);
4009 shash_destroy(&m->dst_ports);
4012 m->bridge->mirrors[m->idx] = NULL;
4021 mirror_collect_ports(struct mirror *m, struct ovsrec_port **ports, int n_ports,
4022 struct shash *names)
4026 for (i = 0; i < n_ports; i++) {
4027 const char *name = ports[i]->name;
4028 if (port_lookup(m->bridge, name)) {
4029 shash_add_once(names, name, NULL);
4031 VLOG_WARN("bridge %s: mirror %s cannot match on nonexistent "
4032 "port %s", m->bridge->name, m->name, name);
4038 mirror_collect_vlans(struct mirror *m, const struct ovsrec_mirror *cfg,
4044 *vlans = xmalloc(sizeof **vlans * cfg->n_select_vlan);
4046 for (i = 0; i < cfg->n_select_vlan; i++) {
4047 int64_t vlan = cfg->select_vlan[i];
4048 if (vlan < 0 || vlan > 4095) {
4049 VLOG_WARN("bridge %s: mirror %s selects invalid VLAN %"PRId64,
4050 m->bridge->name, m->name, vlan);
4052 (*vlans)[n_vlans++] = vlan;
4059 vlan_is_mirrored(const struct mirror *m, int vlan)
4063 for (i = 0; i < m->n_vlans; i++) {
4064 if (m->vlans[i] == vlan) {
4072 port_trunks_any_mirrored_vlan(const struct mirror *m, const struct port *p)
4076 for (i = 0; i < m->n_vlans; i++) {
4077 if (port_trunks_vlan(p, m->vlans[i])) {
4085 mirror_reconfigure_one(struct mirror *m, struct ovsrec_mirror *cfg)
4087 struct shash src_ports, dst_ports;
4088 mirror_mask_t mirror_bit;
4089 struct port *out_port;
4096 if (strcmp(cfg->name, m->name)) {
4098 m->name = xstrdup(cfg->name);
4101 /* Get output port. */
4102 if (cfg->output_port) {
4103 out_port = port_lookup(m->bridge, cfg->output_port->name);
4105 VLOG_ERR("bridge %s: mirror %s outputs to port not on bridge",
4106 m->bridge->name, m->name);
4112 if (cfg->output_vlan) {
4113 VLOG_ERR("bridge %s: mirror %s specifies both output port and "
4114 "output vlan; ignoring output vlan",
4115 m->bridge->name, m->name);
4117 } else if (cfg->output_vlan) {
4119 out_vlan = *cfg->output_vlan;
4121 VLOG_ERR("bridge %s: mirror %s does not specify output; ignoring",
4122 m->bridge->name, m->name);
4127 shash_init(&src_ports);
4128 shash_init(&dst_ports);
4129 if (cfg->select_all) {
4130 for (i = 0; i < m->bridge->n_ports; i++) {
4131 const char *name = m->bridge->ports[i]->name;
4132 shash_add_once(&src_ports, name, NULL);
4133 shash_add_once(&dst_ports, name, NULL);
4138 /* Get ports, and drop duplicates and ports that don't exist. */
4139 mirror_collect_ports(m, cfg->select_src_port, cfg->n_select_src_port,
4141 mirror_collect_ports(m, cfg->select_dst_port, cfg->n_select_dst_port,
4144 /* Get all the vlans, and drop duplicate and invalid vlans. */
4145 n_vlans = mirror_collect_vlans(m, cfg, &vlans);
4148 /* Update mirror data. */
4149 if (!shash_equal_keys(&m->src_ports, &src_ports)
4150 || !shash_equal_keys(&m->dst_ports, &dst_ports)
4151 || m->n_vlans != n_vlans
4152 || memcmp(m->vlans, vlans, sizeof *vlans * n_vlans)
4153 || m->out_port != out_port
4154 || m->out_vlan != out_vlan) {
4155 bridge_flush(m->bridge);
4157 shash_swap(&m->src_ports, &src_ports);
4158 shash_swap(&m->dst_ports, &dst_ports);
4161 m->n_vlans = n_vlans;
4162 m->out_port = out_port;
4163 m->out_vlan = out_vlan;
4166 mirror_bit = MIRROR_MASK_C(1) << m->idx;
4167 for (i = 0; i < m->bridge->n_ports; i++) {
4168 struct port *port = m->bridge->ports[i];
4170 if (shash_find(&m->src_ports, port->name)
4173 ? port_trunks_any_mirrored_vlan(m, port)
4174 : vlan_is_mirrored(m, port->vlan)))) {
4175 port->src_mirrors |= mirror_bit;
4177 port->src_mirrors &= ~mirror_bit;
4180 if (shash_find(&m->dst_ports, port->name)) {
4181 port->dst_mirrors |= mirror_bit;
4183 port->dst_mirrors &= ~mirror_bit;
4188 shash_destroy(&src_ports);
4189 shash_destroy(&dst_ports);