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bridge.c
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/* Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 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 "dpdk.h"
#include "hash.h"
#include "openvswitch/hmap.h"
#include "hmapx.h"
#include "if-notifier.h"
#include "jsonrpc.h"
#include "lacp.h"
#include "mac-learning.h"
#include "mcast-snooping.h"
#include "netdev.h"
#include "netdev-offload.h"
#include "nx-match.h"
#include "ofproto/bond.h"
#include "ofproto/ofproto.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/list.h"
#include "openvswitch/meta-flow.h"
#include "openvswitch/ofp-print.h"
#include "openvswitch/ofpbuf.h"
#include "openvswitch/vconn.h"
#include "openvswitch/vlog.h"
#include "ovs-lldp.h"
#include "ovs-numa.h"
#include "packets.h"
#include "openvswitch/poll-loop.h"
#include "seq.h"
#include "sflow_api.h"
#include "sha1.h"
#include "openvswitch/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 "tnl-ports.h"
#include "util.h"
#include "unixctl.h"
#include "lib/vswitch-idl.h"
#include "xenserver.h"
#include "vlan-bitmap.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. */
struct eth_addr ea; /* Bridge Ethernet Address. */
struct eth_addr default_ea; /* 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;
};
/* Internal representation of conntrack zone configuration table in OVSDB. */
struct ct_zone {
uint16_t zone_id;
struct simap tp; /* A map from timeout policy attribute to
* timeout value. */
struct hmap_node node; /* Node in 'struct datapath' 'ct_zones'
* hmap. */
unsigned int last_used; /* The last idl_seqno that this 'ct_zone' used
* in OVSDB. This number is used for garbage
* collection. */
};
/* Internal representation of datapath configuration table in OVSDB. */
struct datapath {
char *type; /* Datapath type. */
struct hmap ct_zones; /* Map of 'struct ct_zone' elements, indexed
* by 'zone'. */
struct hmap_node node; /* Node in 'all_datapaths' hmap. */
unsigned int last_used; /* The last idl_seqno that this 'datapath'
* used in OVSDB. This number is used for
* garbage collection. */
};
/* All bridges, indexed by name. */
static struct hmap all_bridges = HMAP_INITIALIZER(&all_bridges);
/* All datapath configuartions, indexed by type. */
static struct hmap all_datapaths = HMAP_INITIALIZER(&all_datapaths);
/* 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;
/* Whenever system interfaces are added, removed or change state, the bridge
* will be reconfigured.
*/
static struct if_notifier *ifnotifier;
static struct seq *ifaces_changed;
static uint64_t last_ifaces_changed;
/* Default/min/max packet-in queue sizes towards the controllers. */
#define BRIDGE_CONTROLLER_PACKET_QUEUE_DEFAULT_SIZE 100
#define BRIDGE_CONTROLLER_PACKET_QUEUE_MIN_SIZE 1
#define BRIDGE_CONTROLLER_PACKET_QUEUE_MAX_SIZE 512
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 *, bool del);
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 *,
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 *, struct eth_addr *ea,
struct iface **hw_addr_iface);
static uint64_t bridge_pick_datapath_id(struct bridge *,
const struct eth_addr bridge_ea,
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 void datapath_destroy(struct datapath *dp);
static unixctl_cb_func qos_unixctl_show_types;
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 *);
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;
}
static void
if_change_cb(void *aux OVS_UNUSED)
{
seq_change(ifaces_changed);
}
static bool
if_notifier_changed(struct if_notifier *notifier OVS_UNUSED)
{
uint64_t new_seq;
bool changed = false;
new_seq = seq_read(ifaces_changed);
if (new_seq != last_ifaces_changed) {
changed = true;
last_ifaces_changed = new_seq;
}
seq_wait(ifaces_changed, last_ifaces_changed);
return changed;
}
/* 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_open_vswitch_col_dpdk_version);
ovsdb_idl_omit_alert(idl, &ovsrec_open_vswitch_col_dpdk_initialized);
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-types", "interface", 1, 1,
qos_unixctl_show_types, NULL);
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();
bfd_init();
ovs_numa_init();
stp_init();
lldp_init();
rstp_init();
ifaces_changed = seq_create();
last_ifaces_changed = seq_read(ifaces_changed);
ifnotifier = if_notifier_create(if_change_cb, NULL);
}
void
bridge_exit(bool delete_datapath)
{
if_notifier_destroy(ifnotifier);
seq_destroy(ifaces_changed);
struct datapath *dp, *next;
HMAP_FOR_EACH_SAFE (dp, next, node, &all_datapaths) {
datapath_destroy(dp);
}
struct bridge *br, *next_br;
HMAP_FOR_EACH_SAFE (br, next_br, node, &all_bridges) {
bridge_destroy(br, delete_datapath);
}
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
config_ofproto_types(const struct smap *other_config)
{
struct sset types;
const char *type;
/* Pass custom configuration to datapath types. */
sset_init(&types);
ofproto_enumerate_types(&types);
SSET_FOR_EACH (type, &types) {
ofproto_type_set_config(type, other_config);
}
sset_destroy(&types);
}
static void
get_timeout_policy_from_ovsrec(struct simap *tp,
const struct ovsrec_ct_timeout_policy *tp_cfg)
{
for (size_t i = 0; i < tp_cfg->n_timeouts; i++) {
simap_put(tp, tp_cfg->key_timeouts[i], tp_cfg->value_timeouts[i]);
}
}
static struct ct_zone *
ct_zone_lookup(struct hmap *ct_zones, uint16_t zone_id)
{
struct ct_zone *ct_zone;
HMAP_FOR_EACH_WITH_HASH (ct_zone, node, hash_int(zone_id, 0), ct_zones) {
if (ct_zone->zone_id == zone_id) {
return ct_zone;
}
}
return NULL;
}
static struct ct_zone *
ct_zone_alloc(uint16_t zone_id, struct ovsrec_ct_timeout_policy *tp_cfg)
{
struct ct_zone *ct_zone = xzalloc(sizeof *ct_zone);
ct_zone->zone_id = zone_id;
simap_init(&ct_zone->tp);
get_timeout_policy_from_ovsrec(&ct_zone->tp, tp_cfg);
return ct_zone;
}
static void
ct_zone_remove_and_destroy(struct datapath *dp, struct ct_zone *ct_zone)
{
hmap_remove(&dp->ct_zones, &ct_zone->node);
simap_destroy(&ct_zone->tp);
free(ct_zone);
}
/* Replace 'old_tp' by 'new_tp' (destroyed 'new_tp'). Returns true if 'old_tp'
* and 'new_tp' contains different data, false if they are the same. */
static bool
update_timeout_policy(struct simap *old_tp, struct simap *new_tp)
{
bool changed = !simap_equal(old_tp, new_tp);
if (changed) {
simap_swap(old_tp, new_tp);
}
simap_destroy(new_tp);
return changed;
}
static struct datapath *
datapath_lookup(const char *type)
{
struct datapath *dp;
HMAP_FOR_EACH_WITH_HASH (dp, node, hash_string(type, 0), &all_datapaths) {
if (!strcmp(dp->type, type)) {
return dp;
}
}
return NULL;
}
static struct datapath *
datapath_create(const char *type)
{
struct datapath *dp = xzalloc(sizeof *dp);
dp->type = xstrdup(type);
hmap_init(&dp->ct_zones);
hmap_insert(&all_datapaths, &dp->node, hash_string(type, 0));
return dp;
}
static void
datapath_destroy(struct datapath *dp)
{
if (dp) {
struct ct_zone *ct_zone, *next;
HMAP_FOR_EACH_SAFE (ct_zone, next, node, &dp->ct_zones) {
ofproto_ct_del_zone_timeout_policy(dp->type, ct_zone->zone_id);
ct_zone_remove_and_destroy(dp, ct_zone);
}
hmap_remove(&all_datapaths, &dp->node);
hmap_destroy(&dp->ct_zones);
free(dp->type);
free(dp);
}
}
static void
ct_zones_reconfigure(struct datapath *dp, struct ovsrec_datapath *dp_cfg)
{
struct ct_zone *ct_zone, *next;
/* Add new 'ct_zone's or update existing 'ct_zone's based on the database
* state. */
for (size_t i = 0; i < dp_cfg->n_ct_zones; i++) {
uint16_t zone_id = dp_cfg->key_ct_zones[i];
struct ovsrec_ct_zone *zone_cfg = dp_cfg->value_ct_zones[i];
struct ovsrec_ct_timeout_policy *tp_cfg = zone_cfg->timeout_policy;
ct_zone = ct_zone_lookup(&dp->ct_zones, zone_id);
if (ct_zone) {
struct simap new_tp = SIMAP_INITIALIZER(&new_tp);
get_timeout_policy_from_ovsrec(&new_tp, tp_cfg);
if (update_timeout_policy(&ct_zone->tp, &new_tp)) {
ofproto_ct_set_zone_timeout_policy(dp->type, ct_zone->zone_id,
&ct_zone->tp);
}
} else {
ct_zone = ct_zone_alloc(zone_id, tp_cfg);
hmap_insert(&dp->ct_zones, &ct_zone->node, hash_int(zone_id, 0));
ofproto_ct_set_zone_timeout_policy(dp->type, ct_zone->zone_id,
&ct_zone->tp);
}
ct_zone->last_used = idl_seqno;
}
/* Purge 'ct_zone's no longer found in the database. */
HMAP_FOR_EACH_SAFE (ct_zone, next, node, &dp->ct_zones) {
if (ct_zone->last_used != idl_seqno) {
ofproto_ct_del_zone_timeout_policy(dp->type, ct_zone->zone_id);
ct_zone_remove_and_destroy(dp, ct_zone);
}
}
}
static void
datapath_reconfigure(const struct ovsrec_open_vswitch *cfg)
{
struct datapath *dp, *next;
/* Add new 'datapath's or update existing ones. */
for (size_t i = 0; i < cfg->n_datapaths; i++) {
struct ovsrec_datapath *dp_cfg = cfg->value_datapaths[i];
char *dp_name = cfg->key_datapaths[i];
dp = datapath_lookup(dp_name);
if (!dp) {
dp = datapath_create(dp_name);
}
dp->last_used = idl_seqno;
ct_zones_reconfigure(dp, dp_cfg);
}
/* Purge deleted 'datapath's. */
HMAP_FOR_EACH_SAFE (dp, next, node, &all_datapaths) {
if (dp->last_used != idl_seqno) {
datapath_destroy(dp);
}
}
}
static void
bridge_reconfigure(const struct ovsrec_open_vswitch *ovs_cfg)
{
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_max_revalidator(smap_get_int(&ovs_cfg->other_config,
"max-revalidator",
OFPROTO_MAX_REVALIDATOR_DEFAULT));
ofproto_set_min_revalidate_pps(
smap_get_int(&ovs_cfg->other_config, "min-revalidate-pps",
OFPROTO_MIN_REVALIDATE_PPS_DEFAULT));
ofproto_set_vlan_limit(smap_get_int(&ovs_cfg->other_config, "vlan-limit",
LEGACY_MAX_VLAN_HEADERS));
ofproto_set_bundle_idle_timeout(smap_get_int(&ovs_cfg->other_config,
"bundle-idle-timeout", 0));
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);
HMAP_FOR_EACH (br, node, &all_bridges) {
bridge_collect_wanted_ports(br, &br->wanted_ports);
bridge_del_ports(br, &br->wanted_ports);
}
/* 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, true);
} else {
/* Trigger storing datapath version. */
seq_change(connectivity_seq_get());
}
}
}
config_ofproto_types(&ovs_cfg->other_config);
HMAP_FOR_EACH (br, node, &all_bridges) {
bridge_add_ports(br, &br->wanted_ports);
shash_destroy(&br->wanted_ports);
}
reconfigure_system_stats(ovs_cfg);
datapath_reconfigure(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);
ofproto_port_set_config(br->ofproto, iface->ofp_port,
&iface->cfg->other_config);
}
}
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;
}
/* Configures the MTU of 'netdev' based on the "mtu_request" column
* in 'iface_cfg'. */
static int
iface_set_netdev_mtu(const struct ovsrec_interface *iface_cfg,
struct netdev *netdev)
{
if (iface_cfg->n_mtu_request == 1) {
/* The user explicitly asked for this MTU. */
netdev_mtu_user_config(netdev, true);
/* Try to set the MTU to the requested value. */
return netdev_set_mtu(netdev, *iface_cfg->mtu_request);
}
/* The user didn't explicitly asked for any MTU. */
netdev_mtu_user_config(netdev, false);
return 0;
}
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;