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bridge.c
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/* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <config.h>
#include "bridge.h"
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include "async-append.h"
#include "bfd.h"
#include "bitmap.h"
#include "cfm.h"
#include "connectivity.h"
#include "coverage.h"
#include "daemon.h"
#include "dirs.h"
#include "dpif.h"
#include "dynamic-string.h"
#include "hash.h"
#include "hmap.h"
#include "hmapx.h"
#include "jsonrpc.h"
#include "lacp.h"
#include "list.h"
#include "ovs-lldp.h"
#include "mac-learning.h"
#include "mcast-snooping.h"
#include "meta-flow.h"
#include "netdev.h"
#include "nx-match.h"
#include "ofp-print.h"
#include "ofp-util.h"
#include "ofpbuf.h"
#include "ofproto/bond.h"
#include "ofproto/ofproto.h"
#include "ovs-numa.h"
#include "poll-loop.h"
#include "seq.h"
#include "sha1.h"
#include "shash.h"
#include "smap.h"
#include "socket-util.h"
#include "stream.h"
#include "stream-ssl.h"
#include "sset.h"
#include "system-stats.h"
#include "timeval.h"
#include "util.h"
#include "unixctl.h"
#include "vlandev.h"
#include "lib/vswitch-idl.h"
#include "xenserver.h"
#include "openvswitch/vlog.h"
#include "sflow_api.h"
#include "vlan-bitmap.h"
#include "packets.h"
VLOG_DEFINE_THIS_MODULE(bridge);
COVERAGE_DEFINE(bridge_reconfigure);
struct iface {
/* These members are always valid.
*
* They are immutable: they never change between iface_create() and
* iface_destroy(). */
struct ovs_list port_elem; /* Element in struct port's "ifaces" list. */
struct hmap_node name_node; /* In struct bridge's "iface_by_name" hmap. */
struct hmap_node ofp_port_node; /* In struct bridge's "ifaces" hmap. */
struct port *port; /* Containing port. */
char *name; /* Host network device name. */
struct netdev *netdev; /* Network device. */
ofp_port_t ofp_port; /* OpenFlow port number. */
uint64_t change_seq;
/* These members are valid only within bridge_reconfigure(). */
const char *type; /* Usually same as cfg->type. */
const struct ovsrec_interface *cfg;
};
struct mirror {
struct uuid uuid; /* UUID of this "mirror" record in database. */
struct hmap_node hmap_node; /* In struct bridge's "mirrors" hmap. */
struct bridge *bridge;
char *name;
const struct ovsrec_mirror *cfg;
};
struct port {
struct hmap_node hmap_node; /* Element in struct bridge's "ports" hmap. */
struct bridge *bridge;
char *name;
const struct ovsrec_port *cfg;
/* An ordinary bridge port has 1 interface.
* A bridge port for bonding has at least 2 interfaces. */
struct ovs_list ifaces; /* List of "struct iface"s. */
};
struct bridge {
struct hmap_node node; /* In 'all_bridges'. */
char *name; /* User-specified arbitrary name. */
char *type; /* Datapath type. */
uint8_t ea[ETH_ADDR_LEN]; /* Bridge Ethernet Address. */
uint8_t default_ea[ETH_ADDR_LEN]; /* Default MAC. */
const struct ovsrec_bridge *cfg;
/* OpenFlow switch processing. */
struct ofproto *ofproto; /* OpenFlow switch. */
/* Bridge ports. */
struct hmap ports; /* "struct port"s indexed by name. */
struct hmap ifaces; /* "struct iface"s indexed by ofp_port. */
struct hmap iface_by_name; /* "struct iface"s indexed by name. */
/* Port mirroring. */
struct hmap mirrors; /* "struct mirror" indexed by UUID. */
/* Auto Attach */
struct hmap mappings; /* "struct" indexed by UUID */
/* Used during reconfiguration. */
struct shash wanted_ports;
/* Synthetic local port if necessary. */
struct ovsrec_port synth_local_port;
struct ovsrec_interface synth_local_iface;
struct ovsrec_interface *synth_local_ifacep;
};
struct aa_mapping {
struct hmap_node hmap_node; /* In struct bridge's "mappings" hmap. */
struct bridge *bridge;
uint32_t isid;
uint16_t vlan;
char *br_name;
};
/* All bridges, indexed by name. */
static struct hmap all_bridges = HMAP_INITIALIZER(&all_bridges);
/* OVSDB IDL used to obtain configuration. */
static struct ovsdb_idl *idl;
/* We want to complete daemonization, fully detaching from our parent process,
* only after we have completed our initial configuration, committed our state
* to the database, and received confirmation back from the database server
* that it applied the commit. This allows our parent process to know that,
* post-detach, ephemeral fields such as datapath-id and ofport are very likely
* to have already been filled in. (It is only "very likely" rather than
* certain because there is always a slim possibility that the transaction will
* fail or that some other client has added new bridges, ports, etc. while
* ovs-vswitchd was configuring using an old configuration.)
*
* We only need to do this once for our initial configuration at startup, so
* 'initial_config_done' tracks whether we've already done it. While we are
* waiting for a response to our commit, 'daemonize_txn' tracks the transaction
* itself and is otherwise NULL. */
static bool initial_config_done;
static struct ovsdb_idl_txn *daemonize_txn;
/* Most recently processed IDL sequence number. */
static unsigned int idl_seqno;
/* Track changes to port connectivity. */
static uint64_t connectivity_seqno = LLONG_MIN;
/* Status update to database.
*
* Some information in the database must be kept as up-to-date as possible to
* allow controllers to respond rapidly to network outages. Those status are
* updated via the 'status_txn'.
*
* We use the global connectivity sequence number to detect the status change.
* Also, to prevent the status update from sending too much to the database,
* we check the return status of each update transaction and do not start new
* update if the previous transaction status is 'TXN_INCOMPLETE'.
*
* 'statux_txn' is NULL if there is no ongoing status update.
*
* If the previous database transaction was failed (is not 'TXN_SUCCESS',
* 'TXN_UNCHANGED' or 'TXN_INCOMPLETE'), 'status_txn_try_again' is set to true,
* which will cause the main thread wake up soon and retry the status update.
*/
static struct ovsdb_idl_txn *status_txn;
static bool status_txn_try_again;
/* When the status update transaction returns 'TXN_INCOMPLETE', should register a
* timeout in 'STATUS_CHECK_AGAIN_MSEC' to check again. */
#define STATUS_CHECK_AGAIN_MSEC 100
/* Statistics update to database. */
static struct ovsdb_idl_txn *stats_txn;
/* Each time this timer expires, the bridge fetches interface and mirror
* statistics and pushes them into the database. */
static int stats_timer_interval;
static long long int stats_timer = LLONG_MIN;
/* Each time this timer expires, the bridge fetches the list of port/VLAN
* membership that has been modified by the AA.
*/
#define AA_REFRESH_INTERVAL (1000) /* In milliseconds. */
static long long int aa_refresh_timer = LLONG_MIN;
static void add_del_bridges(const struct ovsrec_open_vswitch *);
static void bridge_run__(void);
static void bridge_create(const struct ovsrec_bridge *);
static void bridge_destroy(struct bridge *);
static struct bridge *bridge_lookup(const char *name);
static unixctl_cb_func bridge_unixctl_dump_flows;
static unixctl_cb_func bridge_unixctl_reconnect;
static size_t bridge_get_controllers(const struct bridge *br,
struct ovsrec_controller ***controllersp);
static void bridge_collect_wanted_ports(struct bridge *,
const unsigned long *splinter_vlans,
struct shash *wanted_ports);
static void bridge_delete_ofprotos(void);
static void bridge_delete_or_reconfigure_ports(struct bridge *);
static void bridge_del_ports(struct bridge *,
const struct shash *wanted_ports);
static void bridge_add_ports(struct bridge *,
const struct shash *wanted_ports);
static void bridge_configure_datapath_id(struct bridge *);
static void bridge_configure_netflow(struct bridge *);
static void bridge_configure_forward_bpdu(struct bridge *);
static void bridge_configure_mac_table(struct bridge *);
static void bridge_configure_mcast_snooping(struct bridge *);
static void bridge_configure_sflow(struct bridge *, int *sflow_bridge_number);
static void bridge_configure_ipfix(struct bridge *);
static void bridge_configure_spanning_tree(struct bridge *);
static void bridge_configure_tables(struct bridge *);
static void bridge_configure_dp_desc(struct bridge *);
static void bridge_configure_aa(struct bridge *);
static void bridge_aa_refresh_queued(struct bridge *);
static bool bridge_aa_need_refresh(struct bridge *);
static void bridge_configure_remotes(struct bridge *,
const struct sockaddr_in *managers,
size_t n_managers);
static void bridge_pick_local_hw_addr(struct bridge *,
uint8_t ea[ETH_ADDR_LEN],
struct iface **hw_addr_iface);
static uint64_t bridge_pick_datapath_id(struct bridge *,
const uint8_t bridge_ea[ETH_ADDR_LEN],
struct iface *hw_addr_iface);
static uint64_t dpid_from_hash(const void *, size_t nbytes);
static bool bridge_has_bond_fake_iface(const struct bridge *,
const char *name);
static bool port_is_bond_fake_iface(const struct port *);
static unixctl_cb_func qos_unixctl_show;
static struct port *port_create(struct bridge *, const struct ovsrec_port *);
static void port_del_ifaces(struct port *);
static void port_destroy(struct port *);
static struct port *port_lookup(const struct bridge *, const char *name);
static void port_configure(struct port *);
static struct lacp_settings *port_configure_lacp(struct port *,
struct lacp_settings *);
static void port_configure_bond(struct port *, struct bond_settings *);
static bool port_is_synthetic(const struct port *);
static void reconfigure_system_stats(const struct ovsrec_open_vswitch *);
static void run_system_stats(void);
static void bridge_configure_mirrors(struct bridge *);
static struct mirror *mirror_create(struct bridge *,
const struct ovsrec_mirror *);
static void mirror_destroy(struct mirror *);
static bool mirror_configure(struct mirror *);
static void mirror_refresh_stats(struct mirror *);
static void iface_configure_lacp(struct iface *, struct lacp_slave_settings *);
static bool iface_create(struct bridge *, const struct ovsrec_interface *,
const struct ovsrec_port *);
static bool iface_is_internal(const struct ovsrec_interface *iface,
const struct ovsrec_bridge *br);
static const char *iface_get_type(const struct ovsrec_interface *,
const struct ovsrec_bridge *);
static void iface_destroy(struct iface *);
static void iface_destroy__(struct iface *);
static struct iface *iface_lookup(const struct bridge *, const char *name);
static struct iface *iface_find(const char *name);
static struct iface *iface_from_ofp_port(const struct bridge *,
ofp_port_t ofp_port);
static void iface_set_mac(const struct bridge *, const struct port *, struct iface *);
static void iface_set_ofport(const struct ovsrec_interface *, ofp_port_t ofport);
static void iface_clear_db_record(const struct ovsrec_interface *if_cfg, char *errp);
static void iface_configure_qos(struct iface *, const struct ovsrec_qos *);
static void iface_configure_cfm(struct iface *);
static void iface_refresh_cfm_stats(struct iface *);
static void iface_refresh_stats(struct iface *);
static void iface_refresh_netdev_status(struct iface *);
static void iface_refresh_ofproto_status(struct iface *);
static bool iface_is_synthetic(const struct iface *);
static ofp_port_t iface_get_requested_ofp_port(
const struct ovsrec_interface *);
static ofp_port_t iface_pick_ofport(const struct ovsrec_interface *);
/* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
*
* This is deprecated. It is only for compatibility with broken device drivers
* in old versions of Linux that do not properly support VLANs when VLAN
* devices are not used. When broken device drivers are no longer in
* widespread use, we will delete these interfaces. */
/* True if VLAN splinters are enabled on any interface, false otherwise.*/
static bool vlan_splinters_enabled_anywhere;
static bool vlan_splinters_is_enabled(const struct ovsrec_interface *);
static unsigned long int *collect_splinter_vlans(
const struct ovsrec_open_vswitch *);
static void configure_splinter_port(struct port *);
static void add_vlan_splinter_ports(struct bridge *,
const unsigned long int *splinter_vlans,
struct shash *ports);
static void discover_types(const struct ovsrec_open_vswitch *cfg);
static void
bridge_init_ofproto(const struct ovsrec_open_vswitch *cfg)
{
struct shash iface_hints;
static bool initialized = false;
int i;
if (initialized) {
return;
}
shash_init(&iface_hints);
if (cfg) {
for (i = 0; i < cfg->n_bridges; i++) {
const struct ovsrec_bridge *br_cfg = cfg->bridges[i];
int j;
for (j = 0; j < br_cfg->n_ports; j++) {
struct ovsrec_port *port_cfg = br_cfg->ports[j];
int k;
for (k = 0; k < port_cfg->n_interfaces; k++) {
struct ovsrec_interface *if_cfg = port_cfg->interfaces[k];
struct iface_hint *iface_hint;
iface_hint = xmalloc(sizeof *iface_hint);
iface_hint->br_name = br_cfg->name;
iface_hint->br_type = br_cfg->datapath_type;
iface_hint->ofp_port = iface_pick_ofport(if_cfg);
shash_add(&iface_hints, if_cfg->name, iface_hint);
}
}
}
}
ofproto_init(&iface_hints);
shash_destroy_free_data(&iface_hints);
initialized = true;
}
/* Public functions. */
/* Initializes the bridge module, configuring it to obtain its configuration
* from an OVSDB server accessed over 'remote', which should be a string in a
* form acceptable to ovsdb_idl_create(). */
void
bridge_init(const char *remote)
{
/* Create connection to database. */
idl = ovsdb_idl_create(remote, &ovsrec_idl_class, true, true);
idl_seqno = ovsdb_idl_get_seqno(idl);
ovsdb_idl_set_lock(idl, "ovs_vswitchd");
ovsdb_idl_verify_write_only(idl);
ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_cur_cfg);
ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_statistics);
ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_datapath_types);
ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_iface_types);
ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_ovs_version);
ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_db_version);
ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_system_type);
ovsdb_idl_omit(idl, &ovsrec_open_vswitch_col_system_version);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_datapath_id);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_datapath_version);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_status);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_rstp_status);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_stp_enable);
ovsdb_idl_omit_alert(idl, &ovsrec_bridge_col_rstp_enable);
ovsdb_idl_omit(idl, &ovsrec_bridge_col_external_ids);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_status);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_rstp_status);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_rstp_statistics);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_statistics);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_bond_active_slave);
ovsdb_idl_omit(idl, &ovsrec_port_col_external_ids);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_trunks);
ovsdb_idl_omit_alert(idl, &ovsrec_port_col_vlan_mode);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_admin_state);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_duplex);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_speed);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_state);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_link_resets);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_mac_in_use);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ifindex);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_mtu);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_ofport);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_statistics);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_status);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_fault);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_fault_status);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_remote_mpids);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_flap_count);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_health);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_remote_opstate);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_bfd_status);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_lacp_current);
ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_error);
ovsdb_idl_omit(idl, &ovsrec_interface_col_external_ids);
ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_is_connected);
ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_role);
ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_status);
ovsdb_idl_omit(idl, &ovsrec_controller_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_qos_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_queue_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_mirror_col_external_ids);
ovsdb_idl_omit_alert(idl, &ovsrec_mirror_col_statistics);
ovsdb_idl_omit(idl, &ovsrec_netflow_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_sflow_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_ipfix_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_flow_sample_collector_set_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_manager_col_external_ids);
ovsdb_idl_omit(idl, &ovsrec_manager_col_inactivity_probe);
ovsdb_idl_omit(idl, &ovsrec_manager_col_is_connected);
ovsdb_idl_omit(idl, &ovsrec_manager_col_max_backoff);
ovsdb_idl_omit(idl, &ovsrec_manager_col_status);
ovsdb_idl_omit(idl, &ovsrec_ssl_col_external_ids);
/* Register unixctl commands. */
unixctl_command_register("qos/show", "interface", 1, 1,
qos_unixctl_show, NULL);
unixctl_command_register("bridge/dump-flows", "bridge", 1, 1,
bridge_unixctl_dump_flows, NULL);
unixctl_command_register("bridge/reconnect", "[bridge]", 0, 1,
bridge_unixctl_reconnect, NULL);
lacp_init();
bond_init();
cfm_init();
ovs_numa_init();
stp_init();
lldp_init();
rstp_init();
}
void
bridge_exit(void)
{
struct bridge *br, *next_br;
HMAP_FOR_EACH_SAFE (br, next_br, node, &all_bridges) {
bridge_destroy(br);
}
ovsdb_idl_destroy(idl);
}
/* Looks at the list of managers in 'ovs_cfg' and extracts their remote IP
* addresses and ports into '*managersp' and '*n_managersp'. The caller is
* responsible for freeing '*managersp' (with free()).
*
* You may be asking yourself "why does ovs-vswitchd care?", because
* ovsdb-server is responsible for connecting to the managers, and ovs-vswitchd
* should not be and in fact is not directly involved in that. But
* ovs-vswitchd needs to make sure that ovsdb-server can reach the managers, so
* it has to tell in-band control where the managers are to enable that.
* (Thus, only managers connected in-band and with non-loopback addresses
* are collected.)
*/
static void
collect_in_band_managers(const struct ovsrec_open_vswitch *ovs_cfg,
struct sockaddr_in **managersp, size_t *n_managersp)
{
struct sockaddr_in *managers = NULL;
size_t n_managers = 0;
struct sset targets;
size_t i;
/* Collect all of the potential targets from the "targets" columns of the
* rows pointed to by "manager_options", excluding any that are
* out-of-band. */
sset_init(&targets);
for (i = 0; i < ovs_cfg->n_manager_options; i++) {
struct ovsrec_manager *m = ovs_cfg->manager_options[i];
if (m->connection_mode && !strcmp(m->connection_mode, "out-of-band")) {
sset_find_and_delete(&targets, m->target);
} else {
sset_add(&targets, m->target);
}
}
/* Now extract the targets' IP addresses. */
if (!sset_is_empty(&targets)) {
const char *target;
managers = xmalloc(sset_count(&targets) * sizeof *managers);
SSET_FOR_EACH (target, &targets) {
union {
struct sockaddr_storage ss;
struct sockaddr_in in;
} sa;
/* Ignore loopback. */
if (stream_parse_target_with_default_port(target, OVSDB_PORT,
&sa.ss)
&& sa.ss.ss_family == AF_INET
&& sa.in.sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
managers[n_managers++] = sa.in;
}
}
}
sset_destroy(&targets);
*managersp = managers;
*n_managersp = n_managers;
}
static void
bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg)
{
unsigned long int *splinter_vlans;
struct sockaddr_in *managers;
struct bridge *br, *next;
int sflow_bridge_number;
size_t n_managers;
COVERAGE_INC(bridge_reconfigure);
ofproto_set_flow_limit(smap_get_int(&ovs_cfg->other_config, "flow-limit",
OFPROTO_FLOW_LIMIT_DEFAULT));
ofproto_set_max_idle(smap_get_int(&ovs_cfg->other_config, "max-idle",
OFPROTO_MAX_IDLE_DEFAULT));
ofproto_set_n_dpdk_rxqs(smap_get_int(&ovs_cfg->other_config,
"n-dpdk-rxqs", 0));
ofproto_set_cpu_mask(smap_get(&ovs_cfg->other_config, "pmd-cpu-mask"));
ofproto_set_threads(
smap_get_int(&ovs_cfg->other_config, "n-handler-threads", 0),
smap_get_int(&ovs_cfg->other_config, "n-revalidator-threads", 0));
/* Destroy "struct bridge"s, "struct port"s, and "struct iface"s according
* to 'ovs_cfg', with only very minimal configuration otherwise.
*
* This is mostly an update to bridge data structures. Nothing is pushed
* down to ofproto or lower layers. */
add_del_bridges(ovs_cfg);
splinter_vlans = collect_splinter_vlans(ovs_cfg);
HMAP_FOR_EACH (br, node, &all_bridges) {
bridge_collect_wanted_ports(br, splinter_vlans, &br->wanted_ports);
bridge_del_ports(br, &br->wanted_ports);
}
free(splinter_vlans);
/* Start pushing configuration changes down to the ofproto layer:
*
* - Delete ofprotos that are no longer configured.
*
* - Delete ports that are no longer configured.
*
* - Reconfigure existing ports to their desired configurations, or
* delete them if not possible.
*
* We have to do all the deletions before we can do any additions, because
* the ports to be added might require resources that will be freed up by
* deletions (they might especially overlap in name). */
bridge_delete_ofprotos();
HMAP_FOR_EACH (br, node, &all_bridges) {
if (br->ofproto) {
bridge_delete_or_reconfigure_ports(br);
}
}
/* Finish pushing configuration changes to the ofproto layer:
*
* - Create ofprotos that are missing.
*
* - Add ports that are missing. */
HMAP_FOR_EACH_SAFE (br, next, node, &all_bridges) {
if (!br->ofproto) {
int error;
error = ofproto_create(br->name, br->type, &br->ofproto);
if (error) {
VLOG_ERR("failed to create bridge %s: %s", br->name,
ovs_strerror(error));
shash_destroy(&br->wanted_ports);
bridge_destroy(br);
} else {
/* Trigger storing datapath version. */
seq_change(connectivity_seq_get());
}
}
}
HMAP_FOR_EACH (br, node, &all_bridges) {
bridge_add_ports(br, &br->wanted_ports);
shash_destroy(&br->wanted_ports);
}
reconfigure_system_stats(ovs_cfg);
/* Complete the configuration. */
sflow_bridge_number = 0;
collect_in_band_managers(ovs_cfg, &managers, &n_managers);
HMAP_FOR_EACH (br, node, &all_bridges) {
struct port *port;
/* We need the datapath ID early to allow LACP ports to use it as the
* default system ID. */
bridge_configure_datapath_id(br);
HMAP_FOR_EACH (port, hmap_node, &br->ports) {
struct iface *iface;
port_configure(port);
LIST_FOR_EACH (iface, port_elem, &port->ifaces) {
iface_set_ofport(iface->cfg, iface->ofp_port);
/* Clear eventual previous errors */
ovsrec_interface_set_error(iface->cfg, NULL);
iface_configure_cfm(iface);
iface_configure_qos(iface, port->cfg->qos);
iface_set_mac(br, port, iface);
ofproto_port_set_bfd(br->ofproto, iface->ofp_port,
&iface->cfg->bfd);
ofproto_port_set_lldp(br->ofproto, iface->ofp_port,
&iface->cfg->lldp);
}
}
bridge_configure_mirrors(br);
bridge_configure_forward_bpdu(br);
bridge_configure_mac_table(br);
bridge_configure_mcast_snooping(br);
bridge_configure_remotes(br, managers, n_managers);
bridge_configure_netflow(br);
bridge_configure_sflow(br, &sflow_bridge_number);
bridge_configure_ipfix(br);
bridge_configure_spanning_tree(br);
bridge_configure_tables(br);
bridge_configure_dp_desc(br);
bridge_configure_aa(br);
}
free(managers);
/* The ofproto-dpif provider does some final reconfiguration in its
* ->type_run() function. We have to call it before notifying the database
* client that reconfiguration is complete, otherwise there is a very
* narrow race window in which e.g. ofproto/trace will not recognize the
* new configuration (sometimes this causes unit test failures). */
bridge_run__();
}
/* Delete ofprotos which aren't configured or have the wrong type. Create
* ofprotos which don't exist but need to. */
static void
bridge_delete_ofprotos(void)
{
struct bridge *br;
struct sset names;
struct sset types;
const char *type;
/* Delete ofprotos with no bridge or with the wrong type. */
sset_init(&names);
sset_init(&types);
ofproto_enumerate_types(&types);
SSET_FOR_EACH (type, &types) {
const char *name;
ofproto_enumerate_names(type, &names);
SSET_FOR_EACH (name, &names) {
br = bridge_lookup(name);
if (!br || strcmp(type, br->type)) {
ofproto_delete(name, type);
}
}
}
sset_destroy(&names);
sset_destroy(&types);
}
static ofp_port_t *
add_ofp_port(ofp_port_t port, ofp_port_t *ports, size_t *n, size_t *allocated)
{
if (*n >= *allocated) {
ports = x2nrealloc(ports, allocated, sizeof *ports);
}
ports[(*n)++] = port;
return ports;
}
static void
bridge_delete_or_reconfigure_ports(struct bridge *br)
{
struct ofproto_port ofproto_port;
struct ofproto_port_dump dump;
struct sset ofproto_ports;
struct port *port, *port_next;
/* List of "ofp_port"s to delete. We make a list instead of deleting them
* right away because ofproto implementations aren't necessarily able to
* iterate through a changing list of ports in an entirely robust way. */
ofp_port_t *del;
size_t n, allocated;
size_t i;
del = NULL;
n = allocated = 0;
sset_init(&ofproto_ports);
/* Main task: Iterate over the ports in 'br->ofproto' and remove the ports
* that are not configured in the database. (This commonly happens when
* ports have been deleted, e.g. with "ovs-vsctl del-port".)
*
* Side tasks: Reconfigure the ports that are still in 'br'. Delete ports
* that have the wrong OpenFlow port number (and arrange to add them back
* with the correct OpenFlow port number). */
OFPROTO_PORT_FOR_EACH (&ofproto_port, &dump, br->ofproto) {
ofp_port_t requested_ofp_port;
struct iface *iface;
sset_add(&ofproto_ports, ofproto_port.name);
iface = iface_lookup(br, ofproto_port.name);
if (!iface) {
/* No such iface is configured, so we should delete this
* ofproto_port.
*
* As a corner case exception, keep the port if it's a bond fake
* interface. */
if (bridge_has_bond_fake_iface(br, ofproto_port.name)
&& !strcmp(ofproto_port.type, "internal")) {
continue;
}
goto delete;
}
if (strcmp(ofproto_port.type, iface->type)
|| netdev_set_config(iface->netdev, &iface->cfg->options, NULL)) {
/* The interface is the wrong type or can't be configured.
* Delete it. */
goto delete;
}
/* If the requested OpenFlow port for 'iface' changed, and it's not
* already the correct port, then we might want to temporarily delete
* this interface, so we can add it back again with the new OpenFlow
* port number. */
requested_ofp_port = iface_get_requested_ofp_port(iface->cfg);
if (iface->ofp_port != OFPP_LOCAL &&
requested_ofp_port != OFPP_NONE &&
requested_ofp_port != iface->ofp_port) {
ofp_port_t victim_request;
struct iface *victim;
/* Check for an existing OpenFlow port currently occupying
* 'iface''s requested port number. If there isn't one, then
* delete this port. Otherwise we need to consider further. */
victim = iface_from_ofp_port(br, requested_ofp_port);
if (!victim) {
goto delete;
}
/* 'victim' is a port currently using 'iface''s requested port
* number. Unless 'victim' specifically requested that port
* number, too, then we can delete both 'iface' and 'victim'
* temporarily. (We'll add both of them back again later with new
* OpenFlow port numbers.)
*
* If 'victim' did request port number 'requested_ofp_port', just
* like 'iface', then that's a configuration inconsistency that we
* can't resolve. We might as well let it keep its current port
* number. */
victim_request = iface_get_requested_ofp_port(victim->cfg);
if (victim_request != requested_ofp_port) {
del = add_ofp_port(victim->ofp_port, del, &n, &allocated);
iface_destroy(victim);
goto delete;
}
}
/* Keep it. */
continue;
delete:
iface_destroy(iface);
del = add_ofp_port(ofproto_port.ofp_port, del, &n, &allocated);
}
for (i = 0; i < n; i++) {
ofproto_port_del(br->ofproto, del[i]);
}
free(del);
/* Iterate over this module's idea of interfaces in 'br'. Remove any ports
* that we didn't see when we iterated through the datapath, i.e. ports
* that disappeared underneath use. This is an unusual situation, but it
* can happen in some cases:
*
* - An admin runs a command like "ovs-dpctl del-port" (which is a bad
* idea but could happen).
*
* - The port represented a device that disappeared, e.g. a tuntap
* device destroyed via "tunctl -d", a physical Ethernet device
* whose module was just unloaded via "rmmod", or a virtual NIC for a
* VM whose VM was just terminated. */
HMAP_FOR_EACH_SAFE (port, port_next, hmap_node, &br->ports) {
struct iface *iface, *iface_next;
LIST_FOR_EACH_SAFE (iface, iface_next, port_elem, &port->ifaces) {
if (!sset_contains(&ofproto_ports, iface->name)) {
iface_destroy__(iface);
}
}
if (list_is_empty(&port->ifaces)) {
port_destroy(port);
}
}
sset_destroy(&ofproto_ports);
}
static void
bridge_add_ports__(struct bridge *br, const struct shash *wanted_ports,
bool with_requested_port)
{
struct shash_node *port_node;
SHASH_FOR_EACH (port_node, wanted_ports) {
const struct ovsrec_port *port_cfg = port_node->data;
size_t i;
for (i = 0; i < port_cfg->n_interfaces; i++) {
const struct ovsrec_interface *iface_cfg = port_cfg->interfaces[i];
ofp_port_t requested_ofp_port;
requested_ofp_port = iface_get_requested_ofp_port(iface_cfg);
if ((requested_ofp_port != OFPP_NONE) == with_requested_port) {
struct iface *iface = iface_lookup(br, iface_cfg->name);
if (!iface) {
iface_create(br, iface_cfg, port_cfg);
}
}
}
}
}
static void
bridge_add_ports(struct bridge *br, const struct shash *wanted_ports)
{
/* First add interfaces that request a particular port number. */
bridge_add_ports__(br, wanted_ports, true);
/* Then add interfaces that want automatic port number assignment.
* We add these afterward to avoid accidentally taking a specifically
* requested port number. */
bridge_add_ports__(br, wanted_ports, false);
}
static void
port_configure(struct port *port)
{
const struct ovsrec_port *cfg = port->cfg;
struct bond_settings bond_settings;
struct lacp_settings lacp_settings;
struct ofproto_bundle_settings s;
struct iface *iface;
if (cfg->vlan_mode && !strcmp(cfg->vlan_mode, "splinter")) {
configure_splinter_port(port);
return;
}
/* Get name. */
s.name = port->name;
/* Get slaves. */
s.n_slaves = 0;
s.slaves = xmalloc(list_size(&port->ifaces) * sizeof *s.slaves);
LIST_FOR_EACH (iface, port_elem, &port->ifaces) {
s.slaves[s.n_slaves++] = iface->ofp_port;
}
/* Get VLAN tag. */
s.vlan = -1;
if (cfg->tag && *cfg->tag >= 0 && *cfg->tag <= 4095) {
s.vlan = *cfg->tag;
}
/* Get VLAN trunks. */
s.trunks = NULL;
if (cfg->n_trunks) {
s.trunks = vlan_bitmap_from_array(cfg->trunks, cfg->n_trunks);
}
/* Get VLAN mode. */
if (cfg->vlan_mode) {
if (!strcmp(cfg->vlan_mode, "access")) {
s.vlan_mode = PORT_VLAN_ACCESS;
} else if (!strcmp(cfg->vlan_mode, "trunk")) {
s.vlan_mode = PORT_VLAN_TRUNK;
} else if (!strcmp(cfg->vlan_mode, "native-tagged")) {
s.vlan_mode = PORT_VLAN_NATIVE_TAGGED;
} else if (!strcmp(cfg->vlan_mode, "native-untagged")) {
s.vlan_mode = PORT_VLAN_NATIVE_UNTAGGED;
} else {
/* This "can't happen" because ovsdb-server should prevent it. */
VLOG_WARN("port %s: unknown VLAN mode %s, falling "
"back to trunk mode", port->name, cfg->vlan_mode);
s.vlan_mode = PORT_VLAN_TRUNK;
}
} else {
if (s.vlan >= 0) {
s.vlan_mode = PORT_VLAN_ACCESS;
if (cfg->n_trunks) {
VLOG_WARN("port %s: ignoring trunks in favor of implicit vlan",
port->name);
}
} else {
s.vlan_mode = PORT_VLAN_TRUNK;
}
}
s.use_priority_tags = smap_get_bool(&cfg->other_config, "priority-tags",
false);
/* Get LACP settings. */
s.lacp = port_configure_lacp(port, &lacp_settings);
if (s.lacp) {
size_t i = 0;
s.lacp_slaves = xmalloc(s.n_slaves * sizeof *s.lacp_slaves);
LIST_FOR_EACH (iface, port_elem, &port->ifaces) {
iface_configure_lacp(iface, &s.lacp_slaves[i++]);
}
} else {
s.lacp_slaves = NULL;
}
/* Get bond settings. */
if (s.n_slaves > 1) {
s.bond = &bond_settings;
port_configure_bond(port, &bond_settings);
} else {
s.bond = NULL;
LIST_FOR_EACH (iface, port_elem, &port->ifaces) {
netdev_set_miimon_interval(iface->netdev, 0);
}
}
/* Register. */
ofproto_bundle_register(port->bridge->ofproto, port, &s);
/* Clean up. */
free(s.slaves);
free(s.trunks);
free(s.lacp_slaves);
}
/* Pick local port hardware address and datapath ID for 'br'. */
static void
bridge_configure_datapath_id(struct bridge *br)
{
uint8_t ea[ETH_ADDR_LEN];
uint64_t dpid;