/
ovn-northd.c
12285 lines (10880 loc) · 467 KB
/
ovn-northd.c
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/*
* 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 <getopt.h>
#include <stdlib.h>
#include <stdio.h>
#include "bitmap.h"
#include "command-line.h"
#include "daemon.h"
#include "dirs.h"
#include "openvswitch/dynamic-string.h"
#include "fatal-signal.h"
#include "hash.h"
#include "openvswitch/hmap.h"
#include "openvswitch/json.h"
#include "ovn/lex.h"
#include "lib/chassis-index.h"
#include "lib/ip-mcast-index.h"
#include "lib/mcast-group-index.h"
#include "lib/ovn-l7.h"
#include "lib/ovn-nb-idl.h"
#include "lib/ovn-sb-idl.h"
#include "lib/ovn-util.h"
#include "ovn/actions.h"
#include "ovn/logical-fields.h"
#include "packets.h"
#include "openvswitch/poll-loop.h"
#include "smap.h"
#include "sset.h"
#include "svec.h"
#include "stream.h"
#include "stream-ssl.h"
#include "unixctl.h"
#include "util.h"
#include "uuid.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ovn_northd);
static unixctl_cb_func ovn_northd_exit;
static unixctl_cb_func ovn_northd_pause;
static unixctl_cb_func ovn_northd_resume;
static unixctl_cb_func ovn_northd_is_paused;
static unixctl_cb_func ovn_northd_status;
struct northd_context {
struct ovsdb_idl *ovnnb_idl;
struct ovsdb_idl *ovnsb_idl;
struct ovsdb_idl_txn *ovnnb_txn;
struct ovsdb_idl_txn *ovnsb_txn;
struct ovsdb_idl_index *sbrec_ha_chassis_grp_by_name;
struct ovsdb_idl_index *sbrec_mcast_group_by_name_dp;
struct ovsdb_idl_index *sbrec_ip_mcast_by_dp;
};
struct northd_state {
bool had_lock;
bool paused;
};
static const char *ovnnb_db;
static const char *ovnsb_db;
static const char *unixctl_path;
#define MAC_ADDR_SPACE 0xffffff
/* MAC address management (macam) table of "struct eth_addr"s, that holds the
* MAC addresses allocated by the OVN ipam module. */
static struct hmap macam = HMAP_INITIALIZER(&macam);
static struct eth_addr mac_prefix;
static bool controller_event_en;
/* MAC allocated for service monitor usage. Just one mac is allocated
* for this purpose and ovn-controller's on each chassis will make use
* of this mac when sending out the packets to monitor the services
* defined in Service_Monitor Southbound table. Since these packets
* all locally handled, having just one mac is good enough. */
static char svc_monitor_mac[ETH_ADDR_STRLEN + 1];
static struct eth_addr svc_monitor_mac_ea;
/* Default probe interval for NB and SB DB connections. */
#define DEFAULT_PROBE_INTERVAL_MSEC 5000
static int northd_probe_interval = DEFAULT_PROBE_INTERVAL_MSEC;
#define MAX_OVN_TAGS 4096
/* Pipeline stages. */
/* The two pipelines in an OVN logical flow table. */
enum ovn_pipeline {
P_IN, /* Ingress pipeline. */
P_OUT /* Egress pipeline. */
};
/* The two purposes for which ovn-northd uses OVN logical datapaths. */
enum ovn_datapath_type {
DP_SWITCH, /* OVN logical switch. */
DP_ROUTER /* OVN logical router. */
};
/* Returns an "enum ovn_stage" built from the arguments.
*
* (It's better to use ovn_stage_build() for type-safety reasons, but inline
* functions can't be used in enums or switch cases.) */
#define OVN_STAGE_BUILD(DP_TYPE, PIPELINE, TABLE) \
(((DP_TYPE) << 9) | ((PIPELINE) << 8) | (TABLE))
/* A stage within an OVN logical switch or router.
*
* An "enum ovn_stage" indicates whether the stage is part of a logical switch
* or router, whether the stage is part of the ingress or egress pipeline, and
* the table within that pipeline. The first three components are combined to
* form the stage's full name, e.g. S_SWITCH_IN_PORT_SEC_L2,
* S_ROUTER_OUT_DELIVERY. */
enum ovn_stage {
#define PIPELINE_STAGES \
/* Logical switch ingress stages. */ \
PIPELINE_STAGE(SWITCH, IN, PORT_SEC_L2, 0, "ls_in_port_sec_l2") \
PIPELINE_STAGE(SWITCH, IN, PORT_SEC_IP, 1, "ls_in_port_sec_ip") \
PIPELINE_STAGE(SWITCH, IN, PORT_SEC_ND, 2, "ls_in_port_sec_nd") \
PIPELINE_STAGE(SWITCH, IN, PRE_ACL, 3, "ls_in_pre_acl") \
PIPELINE_STAGE(SWITCH, IN, PRE_LB, 4, "ls_in_pre_lb") \
PIPELINE_STAGE(SWITCH, IN, PRE_STATEFUL, 5, "ls_in_pre_stateful") \
PIPELINE_STAGE(SWITCH, IN, ACL, 6, "ls_in_acl") \
PIPELINE_STAGE(SWITCH, IN, QOS_MARK, 7, "ls_in_qos_mark") \
PIPELINE_STAGE(SWITCH, IN, QOS_METER, 8, "ls_in_qos_meter") \
PIPELINE_STAGE(SWITCH, IN, LB, 9, "ls_in_lb") \
PIPELINE_STAGE(SWITCH, IN, STATEFUL, 10, "ls_in_stateful") \
PIPELINE_STAGE(SWITCH, IN, PRE_HAIRPIN, 11, "ls_in_pre_hairpin") \
PIPELINE_STAGE(SWITCH, IN, HAIRPIN, 12, "ls_in_hairpin") \
PIPELINE_STAGE(SWITCH, IN, ARP_ND_RSP, 13, "ls_in_arp_rsp") \
PIPELINE_STAGE(SWITCH, IN, DHCP_OPTIONS, 14, "ls_in_dhcp_options") \
PIPELINE_STAGE(SWITCH, IN, DHCP_RESPONSE, 15, "ls_in_dhcp_response") \
PIPELINE_STAGE(SWITCH, IN, DNS_LOOKUP, 16, "ls_in_dns_lookup") \
PIPELINE_STAGE(SWITCH, IN, DNS_RESPONSE, 17, "ls_in_dns_response") \
PIPELINE_STAGE(SWITCH, IN, EXTERNAL_PORT, 18, "ls_in_external_port") \
PIPELINE_STAGE(SWITCH, IN, L2_LKUP, 19, "ls_in_l2_lkup") \
\
/* Logical switch egress stages. */ \
PIPELINE_STAGE(SWITCH, OUT, PRE_LB, 0, "ls_out_pre_lb") \
PIPELINE_STAGE(SWITCH, OUT, PRE_ACL, 1, "ls_out_pre_acl") \
PIPELINE_STAGE(SWITCH, OUT, PRE_STATEFUL, 2, "ls_out_pre_stateful") \
PIPELINE_STAGE(SWITCH, OUT, LB, 3, "ls_out_lb") \
PIPELINE_STAGE(SWITCH, OUT, ACL, 4, "ls_out_acl") \
PIPELINE_STAGE(SWITCH, OUT, QOS_MARK, 5, "ls_out_qos_mark") \
PIPELINE_STAGE(SWITCH, OUT, QOS_METER, 6, "ls_out_qos_meter") \
PIPELINE_STAGE(SWITCH, OUT, STATEFUL, 7, "ls_out_stateful") \
PIPELINE_STAGE(SWITCH, OUT, PORT_SEC_IP, 8, "ls_out_port_sec_ip") \
PIPELINE_STAGE(SWITCH, OUT, PORT_SEC_L2, 9, "ls_out_port_sec_l2") \
\
/* Logical router ingress stages. */ \
PIPELINE_STAGE(ROUTER, IN, ADMISSION, 0, "lr_in_admission") \
PIPELINE_STAGE(ROUTER, IN, LOOKUP_NEIGHBOR, 1, "lr_in_lookup_neighbor") \
PIPELINE_STAGE(ROUTER, IN, LEARN_NEIGHBOR, 2, "lr_in_learn_neighbor") \
PIPELINE_STAGE(ROUTER, IN, IP_INPUT, 3, "lr_in_ip_input") \
PIPELINE_STAGE(ROUTER, IN, DEFRAG, 4, "lr_in_defrag") \
PIPELINE_STAGE(ROUTER, IN, UNSNAT, 5, "lr_in_unsnat") \
PIPELINE_STAGE(ROUTER, IN, DNAT, 6, "lr_in_dnat") \
PIPELINE_STAGE(ROUTER, IN, ND_RA_OPTIONS, 7, "lr_in_nd_ra_options") \
PIPELINE_STAGE(ROUTER, IN, ND_RA_RESPONSE, 8, "lr_in_nd_ra_response") \
PIPELINE_STAGE(ROUTER, IN, IP_ROUTING, 9, "lr_in_ip_routing") \
PIPELINE_STAGE(ROUTER, IN, IP_ROUTING_ECMP, 10, "lr_in_ip_routing_ecmp") \
PIPELINE_STAGE(ROUTER, IN, POLICY, 11, "lr_in_policy") \
PIPELINE_STAGE(ROUTER, IN, ARP_RESOLVE, 12, "lr_in_arp_resolve") \
PIPELINE_STAGE(ROUTER, IN, CHK_PKT_LEN , 13, "lr_in_chk_pkt_len") \
PIPELINE_STAGE(ROUTER, IN, LARGER_PKTS, 14,"lr_in_larger_pkts") \
PIPELINE_STAGE(ROUTER, IN, GW_REDIRECT, 15, "lr_in_gw_redirect") \
PIPELINE_STAGE(ROUTER, IN, ARP_REQUEST, 16, "lr_in_arp_request") \
\
/* Logical router egress stages. */ \
PIPELINE_STAGE(ROUTER, OUT, UNDNAT, 0, "lr_out_undnat") \
PIPELINE_STAGE(ROUTER, OUT, SNAT, 1, "lr_out_snat") \
PIPELINE_STAGE(ROUTER, OUT, EGR_LOOP, 2, "lr_out_egr_loop") \
PIPELINE_STAGE(ROUTER, OUT, DELIVERY, 3, "lr_out_delivery")
#define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \
S_##DP_TYPE##_##PIPELINE##_##STAGE \
= OVN_STAGE_BUILD(DP_##DP_TYPE, P_##PIPELINE, TABLE),
PIPELINE_STAGES
#undef PIPELINE_STAGE
};
/* Due to various hard-coded priorities need to implement ACLs, the
* northbound database supports a smaller range of ACL priorities than
* are available to logical flows. This value is added to an ACL
* priority to determine the ACL's logical flow priority. */
#define OVN_ACL_PRI_OFFSET 1000
/* Register definitions specific to switches. */
#define REGBIT_CONNTRACK_DEFRAG "reg0[0]"
#define REGBIT_CONNTRACK_COMMIT "reg0[1]"
#define REGBIT_CONNTRACK_NAT "reg0[2]"
#define REGBIT_DHCP_OPTS_RESULT "reg0[3]"
#define REGBIT_DNS_LOOKUP_RESULT "reg0[4]"
#define REGBIT_ND_RA_OPTS_RESULT "reg0[5]"
#define REGBIT_HAIRPIN "reg0[6]"
/* Register definitions for switches and routers. */
/* Indicate that this packet has been recirculated using egress
* loopback. This allows certain checks to be bypassed, such as a
* logical router dropping packets with source IP address equals
* one of the logical router's own IP addresses. */
#define REGBIT_EGRESS_LOOPBACK "reg9[0]"
/* Register to store the result of check_pkt_larger action. */
#define REGBIT_PKT_LARGER "reg9[1]"
#define REGBIT_LOOKUP_NEIGHBOR_RESULT "reg9[2]"
#define REGBIT_SKIP_LOOKUP_NEIGHBOR "reg9[3]"
/* Register to store the eth address associated to a router port for packets
* received in S_ROUTER_IN_ADMISSION.
*/
#define REG_INPORT_ETH_ADDR "xreg0[0..47]"
/* Register for ECMP bucket selection. */
#define REG_ECMP_GROUP_ID "reg8[0..15]"
#define REG_ECMP_MEMBER_ID "reg8[16..31]"
/* Registers used for routing. */
#define REG_NEXT_HOP_IPV4 "reg0"
#define REG_NEXT_HOP_IPV6 "xxreg0"
#define REG_SRC_IPV4 "reg1"
#define REG_SRC_IPV6 "xxreg1"
#define FLAGBIT_NOT_VXLAN "flags[1] == 0"
/*
* OVS register usage:
*
* Logical Switch pipeline:
* +---------+-------------------------------------+
* | R0 | REGBIT_{CONNTRACK/DHCP/DNS/HAIRPIN} |
* +---------+-------------------------------------+
* | R1 - R9 | UNUSED |
* +---------+-------------------------------------+
*
* Logical Router pipeline:
* +-----+--------------------------+---+-----------------+---+---------------+
* | R0 | REGBIT_ND_RA_OPTS_RESULT | | | | |
* | | (= IN_ND_RA_OPTIONS) | X | | | |
* | | NEXT_HOP_IPV4 | R | | | |
* | | (>= IP_INPUT) | E | INPORT_ETH_ADDR | X | |
* +-----+--------------------------+ G | (< IP_INPUT) | X | |
* | R1 | SRC_IPV4 for ARP-REQ | 0 | | R | |
* | | (>= IP_INPUT) | | | E | NEXT_HOP_IPV6 |
* +-----+--------------------------+---+-----------------+ G | (>= IP_INPUT) |
* | R2 | UNUSED | X | | 0 | |
* | | | R | | | |
* +-----+--------------------------+ E | UNUSED | | |
* | R3 | UNUSED | G | | | |
* | | | 1 | | | |
* +-----+--------------------------+---+-----------------+---+---------------+
* | R4 | UNUSED | X | | | |
* | | | R | | | |
* +-----+--------------------------+ E | UNUSED | X | |
* | R5 | UNUSED | G | | X | |
* | | | 2 | | R |SRC_IPV6 for NS|
* +-----+--------------------------+---+-----------------+ E | (>= IP_INPUT) |
* | R6 | UNUSED | X | | G | |
* | | | R | | 1 | |
* +-----+--------------------------+ E | UNUSED | | |
* | R7 | UNUSED | G | | | |
* | | | 3 | | | |
* +-----+--------------------------+---+-----------------+---+---------------+
* | R8 | ECMP_GROUP_ID | | |
* | | ECMP_MEMBER_ID | X | |
* +-----+--------------------------+ R | |
* | | REGBIT_{ | E | |
* | | EGRESS_LOOPBACK/ | G | UNUSED |
* | R9 | PKT_LARGER/ | 4 | |
* | | LOOKUP_NEIGHBOR_RESULT/| | |
* | | SKIP_LOOKUP_NEIGHBOR} | | |
* +-----+--------------------------+---+-----------------+
*
*/
/* Returns an "enum ovn_stage" built from the arguments. */
static enum ovn_stage
ovn_stage_build(enum ovn_datapath_type dp_type, enum ovn_pipeline pipeline,
uint8_t table)
{
return OVN_STAGE_BUILD(dp_type, pipeline, table);
}
/* Returns the pipeline to which 'stage' belongs. */
static enum ovn_pipeline
ovn_stage_get_pipeline(enum ovn_stage stage)
{
return (stage >> 8) & 1;
}
/* Returns the pipeline name to which 'stage' belongs. */
static const char *
ovn_stage_get_pipeline_name(enum ovn_stage stage)
{
return ovn_stage_get_pipeline(stage) == P_IN ? "ingress" : "egress";
}
/* Returns the table to which 'stage' belongs. */
static uint8_t
ovn_stage_get_table(enum ovn_stage stage)
{
return stage & 0xff;
}
/* Returns a string name for 'stage'. */
static const char *
ovn_stage_to_str(enum ovn_stage stage)
{
switch (stage) {
#define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \
case S_##DP_TYPE##_##PIPELINE##_##STAGE: return NAME;
PIPELINE_STAGES
#undef PIPELINE_STAGE
default: return "<unknown>";
}
}
/* Returns the type of the datapath to which a flow with the given 'stage' may
* be added. */
static enum ovn_datapath_type
ovn_stage_to_datapath_type(enum ovn_stage stage)
{
switch (stage) {
#define PIPELINE_STAGE(DP_TYPE, PIPELINE, STAGE, TABLE, NAME) \
case S_##DP_TYPE##_##PIPELINE##_##STAGE: return DP_##DP_TYPE;
PIPELINE_STAGES
#undef PIPELINE_STAGE
default: OVS_NOT_REACHED();
}
}
static void
usage(void)
{
printf("\
%s: OVN northbound management daemon\n\
usage: %s [OPTIONS]\n\
\n\
Options:\n\
--ovnnb-db=DATABASE connect to ovn-nb database at DATABASE\n\
(default: %s)\n\
--ovnsb-db=DATABASE connect to ovn-sb database at DATABASE\n\
(default: %s)\n\
--unixctl=SOCKET override default control socket name\n\
-h, --help display this help message\n\
-o, --options list available options\n\
-V, --version display version information\n\
", program_name, program_name, default_nb_db(), default_sb_db());
daemon_usage();
vlog_usage();
stream_usage("database", true, true, false);
}
struct ovn_chassis_qdisc_queues {
struct hmap_node key_node;
uint32_t queue_id;
struct uuid chassis_uuid;
};
static uint32_t
hash_chassis_queue(const struct uuid *chassis_uuid, uint32_t queue_id)
{
return hash_2words(uuid_hash(chassis_uuid), queue_id);
}
static void
destroy_chassis_queues(struct hmap *set)
{
struct ovn_chassis_qdisc_queues *node;
HMAP_FOR_EACH_POP (node, key_node, set) {
free(node);
}
hmap_destroy(set);
}
static void
add_chassis_queue(struct hmap *set, const struct uuid *chassis_uuid,
uint32_t queue_id)
{
struct ovn_chassis_qdisc_queues *node = xmalloc(sizeof *node);
node->queue_id = queue_id;
node->chassis_uuid = *chassis_uuid;
hmap_insert(set, &node->key_node,
hash_chassis_queue(chassis_uuid, queue_id));
}
static bool
chassis_queueid_in_use(const struct hmap *set, const struct uuid *chassis_uuid,
uint32_t queue_id)
{
const struct ovn_chassis_qdisc_queues *node;
HMAP_FOR_EACH_WITH_HASH (node, key_node,
hash_chassis_queue(chassis_uuid, queue_id), set) {
if (uuid_equals(chassis_uuid, &node->chassis_uuid)
&& node->queue_id == queue_id) {
return true;
}
}
return false;
}
static uint32_t
allocate_chassis_queueid(struct hmap *set, const struct uuid *uuid, char *name)
{
if (!uuid) {
return 0;
}
for (uint32_t queue_id = QDISC_MIN_QUEUE_ID + 1;
queue_id <= QDISC_MAX_QUEUE_ID;
queue_id++) {
if (!chassis_queueid_in_use(set, uuid, queue_id)) {
add_chassis_queue(set, uuid, queue_id);
return queue_id;
}
}
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
VLOG_WARN_RL(&rl, "all %s queue ids exhausted", name);
return 0;
}
static void
free_chassis_queueid(struct hmap *set, const struct uuid *uuid,
uint32_t queue_id)
{
if (!uuid) {
return;
}
struct ovn_chassis_qdisc_queues *node;
HMAP_FOR_EACH_WITH_HASH (node, key_node,
hash_chassis_queue(uuid, queue_id), set) {
if (uuid_equals(uuid, &node->chassis_uuid)
&& node->queue_id == queue_id) {
hmap_remove(set, &node->key_node);
free(node);
break;
}
}
}
static inline bool
port_has_qos_params(const struct smap *opts)
{
return (smap_get(opts, "qos_max_rate") ||
smap_get(opts, "qos_burst"));
}
struct ipam_info {
uint32_t start_ipv4;
size_t total_ipv4s;
unsigned long *allocated_ipv4s; /* A bitmap of allocated IPv4s */
bool ipv6_prefix_set;
struct in6_addr ipv6_prefix;
bool mac_only;
};
/*
* Multicast snooping and querier per datapath configuration.
*/
struct mcast_switch_info {
bool enabled; /* True if snooping enabled. */
bool querier; /* True if querier enabled. */
bool flood_unregistered; /* True if unregistered multicast should be
* flooded.
*/
bool flood_relay; /* True if the switch is connected to a
* multicast router and unregistered multicast
* should be flooded to the mrouter. Only
* applicable if flood_unregistered == false.
*/
bool flood_reports; /* True if the switch has at least one port
* configured to flood reports.
*/
bool flood_static; /* True if the switch has at least one port
* configured to flood traffic.
*/
int64_t table_size; /* Max number of IP multicast groups. */
int64_t idle_timeout; /* Timeout after which an idle group is
* flushed.
*/
int64_t query_interval; /* Interval between multicast queries. */
char *eth_src; /* ETH src address of the queries. */
char *ipv4_src; /* IPv4 src address of the queries. */
char *ipv6_src; /* IPv6 src address of the queries. */
int64_t query_max_response; /* Expected time after which reports should
* be received for queries that were sent out.
*/
uint32_t active_v4_flows; /* Current number of active IPv4 multicast
* flows.
*/
uint32_t active_v6_flows; /* Current number of active IPv6 multicast
* flows.
*/
};
struct mcast_router_info {
bool relay; /* True if the router should relay IP multicast. */
bool flood_static; /* True if the router has at least one port configured
* to flood traffic.
*/
};
struct mcast_info {
struct hmap group_tnlids; /* Group tunnel IDs in use on this DP. */
uint32_t group_tnlid_hint; /* Hint for allocating next group tunnel ID. */
struct ovs_list groups; /* List of groups learnt on this DP. */
union {
struct mcast_switch_info sw; /* Switch specific multicast info. */
struct mcast_router_info rtr; /* Router specific multicast info. */
};
};
struct mcast_port_info {
bool flood; /* True if the port should flood IP multicast traffic
* regardless if it's registered or not. */
bool flood_reports; /* True if the port should flood IP multicast reports
* (e.g., IGMP join/leave). */
};
static void
init_mcast_port_info(struct mcast_port_info *mcast_info,
const struct nbrec_logical_switch_port *nbsp,
const struct nbrec_logical_router_port *nbrp)
{
if (nbsp) {
mcast_info->flood =
smap_get_bool( ->options, "mcast_flood", false);
mcast_info->flood_reports =
smap_get_bool( ->options, "mcast_flood_reports",
false);
} else if (nbrp) {
/* We don't process multicast reports in any special way on logical
* routers so just treat them as regular multicast traffic.
*/
mcast_info->flood =
smap_get_bool(&nbrp->options, "mcast_flood", false);
mcast_info->flood_reports = mcast_info->flood;
}
}
static uint32_t
ovn_mcast_group_allocate_key(struct mcast_info *mcast_info)
{
return ovn_allocate_tnlid(&mcast_info->group_tnlids, "multicast group",
OVN_MIN_IP_MULTICAST, OVN_MAX_IP_MULTICAST,
&mcast_info->group_tnlid_hint);
}
/* The 'key' comes from nbs->header_.uuid or nbr->header_.uuid or
* sb->external_ids:logical-switch. */
struct ovn_datapath {
struct hmap_node key_node; /* Index on 'key'. */
struct uuid key; /* (nbs/nbr)->header_.uuid. */
const struct nbrec_logical_switch *nbs; /* May be NULL. */
const struct nbrec_logical_router *nbr; /* May be NULL. */
const struct sbrec_datapath_binding *sb; /* May be NULL. */
struct ovs_list list; /* In list of similar records. */
/* Logical switch data. */
struct ovn_port **router_ports;
size_t n_router_ports;
struct hmap port_tnlids;
uint32_t port_key_hint;
bool has_unknown;
/* IPAM data. */
struct ipam_info ipam_info;
/* Multicast data. */
struct mcast_info mcast_info;
/* OVN northd only needs to know about the logical router gateway port for
* NAT on a distributed router. This "distributed gateway port" is
* populated only when there is a "redirect-chassis" specified for one of
* the ports on the logical router. Otherwise this will be NULL. */
struct ovn_port *l3dgw_port;
/* The "derived" OVN port representing the instance of l3dgw_port on
* the "redirect-chassis". */
struct ovn_port *l3redirect_port;
struct ovn_port **localnet_ports;
size_t n_localnet_ports;
struct ovs_list lr_list; /* In list of logical router datapaths. */
/* The logical router group to which this datapath belongs.
* Valid only if it is logical router datapath. NULL otherwise. */
struct lrouter_group *lr_group;
/* Port groups related to the datapath, used only when nbs is NOT NULL. */
struct hmap nb_pgs;
};
/* A group of logical router datapaths which are connected - either
* directly or indirectly.
* Each logical router can belong to only one group. */
struct lrouter_group {
struct ovn_datapath **router_dps;
int n_router_dps;
/* Set of ha_chassis_groups which are associated with the router dps. */
struct sset ha_chassis_groups;
};
struct macam_node {
struct hmap_node hmap_node;
struct eth_addr mac_addr; /* Allocated MAC address. */
};
static void
cleanup_macam(struct hmap *macam_)
{
struct macam_node *node;
HMAP_FOR_EACH_POP (node, hmap_node, macam_) {
free(node);
}
}
static struct ovn_datapath *
ovn_datapath_create(struct hmap *datapaths, const struct uuid *key,
const struct nbrec_logical_switch *nbs,
const struct nbrec_logical_router *nbr,
const struct sbrec_datapath_binding *sb)
{
struct ovn_datapath *od = xzalloc(sizeof *od);
od->key = *key;
od->sb = sb;
od->nbs = nbs;
od->nbr = nbr;
hmap_init(&od->port_tnlids);
hmap_init(&od->nb_pgs);
od->port_key_hint = 0;
hmap_insert(datapaths, &od->key_node, uuid_hash(&od->key));
od->lr_group = NULL;
return od;
}
static void ovn_ls_port_group_destroy(struct hmap *nb_pgs);
static void destroy_mcast_info_for_datapath(struct ovn_datapath *od);
static void
ovn_datapath_destroy(struct hmap *datapaths, struct ovn_datapath *od)
{
if (od) {
/* Don't remove od->list. It is used within build_datapaths() as a
* private list and once we've exited that function it is not safe to
* use it. */
hmap_remove(datapaths, &od->key_node);
ovn_destroy_tnlids(&od->port_tnlids);
bitmap_free(od->ipam_info.allocated_ipv4s);
free(od->router_ports);
free(od->localnet_ports);
ovn_ls_port_group_destroy(&od->nb_pgs);
destroy_mcast_info_for_datapath(od);
free(od);
}
}
/* Returns 'od''s datapath type. */
static enum ovn_datapath_type
ovn_datapath_get_type(const struct ovn_datapath *od)
{
return od->nbs ? DP_SWITCH : DP_ROUTER;
}
static struct ovn_datapath *
ovn_datapath_find(struct hmap *datapaths, const struct uuid *uuid)
{
struct ovn_datapath *od;
HMAP_FOR_EACH_WITH_HASH (od, key_node, uuid_hash(uuid), datapaths) {
if (uuid_equals(uuid, &od->key)) {
return od;
}
}
return NULL;
}
static bool
ovn_datapath_is_stale(const struct ovn_datapath *od)
{
return !od->nbr && !od->nbs;
}
static struct ovn_datapath *
ovn_datapath_from_sbrec(struct hmap *datapaths,
const struct sbrec_datapath_binding *sb)
{
struct uuid key;
if (!smap_get_uuid(&sb->external_ids, "logical-switch", &key) &&
!smap_get_uuid(&sb->external_ids, "logical-router", &key)) {
return NULL;
}
return ovn_datapath_find(datapaths, &key);
}
static bool
lrouter_is_enabled(const struct nbrec_logical_router *lrouter)
{
return !lrouter->enabled || *lrouter->enabled;
}
static void
init_ipam_info_for_datapath(struct ovn_datapath *od)
{
if (!od->nbs) {
return;
}
const char *subnet_str = smap_get(&od->nbs->other_config, "subnet");
const char *ipv6_prefix = smap_get(&od->nbs->other_config, "ipv6_prefix");
if (ipv6_prefix) {
if (strstr(ipv6_prefix, "/")) {
/* If a prefix length was specified, it must be 64. */
struct in6_addr mask;
char *error
= ipv6_parse_masked(ipv6_prefix,
&od->ipam_info.ipv6_prefix, &mask);
if (error) {
static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "bad 'ipv6_prefix' %s: %s",
ipv6_prefix, error);
free(error);
} else {
if (ipv6_count_cidr_bits(&mask) == 64) {
od->ipam_info.ipv6_prefix_set = true;
} else {
static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "bad 'ipv6_prefix' %s: must be /64",
ipv6_prefix);
}
}
} else {
od->ipam_info.ipv6_prefix_set = ipv6_parse(
ipv6_prefix, &od->ipam_info.ipv6_prefix);
if (!od->ipam_info.ipv6_prefix_set) {
static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "bad 'ipv6_prefix' %s", ipv6_prefix);
}
}
}
if (!subnet_str) {
if (!ipv6_prefix) {
od->ipam_info.mac_only = smap_get_bool(&od->nbs->other_config,
"mac_only", false);
}
return;
}
ovs_be32 subnet, mask;
char *error = ip_parse_masked(subnet_str, &subnet, &mask);
if (error || mask == OVS_BE32_MAX || !ip_is_cidr(mask)) {
static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "bad 'subnet' %s", subnet_str);
free(error);
return;
}
od->ipam_info.start_ipv4 = ntohl(subnet & mask) + 1;
od->ipam_info.total_ipv4s = ~ntohl(mask);
od->ipam_info.allocated_ipv4s =
bitmap_allocate(od->ipam_info.total_ipv4s);
/* Mark first IP as taken */
bitmap_set1(od->ipam_info.allocated_ipv4s, 0);
/* Check if there are any reserver IPs (list) to be excluded from IPAM */
const char *exclude_ip_list = smap_get(&od->nbs->other_config,
"exclude_ips");
if (!exclude_ip_list) {
return;
}
struct lexer lexer;
lexer_init(&lexer, exclude_ip_list);
/* exclude_ip_list could be in the format -
* "10.0.0.4 10.0.0.10 10.0.0.20..10.0.0.50 10.0.0.100..10.0.0.110".
*/
lexer_get(&lexer);
while (lexer.token.type != LEX_T_END) {
if (lexer.token.type != LEX_T_INTEGER) {
lexer_syntax_error(&lexer, "expecting address");
break;
}
uint32_t start = ntohl(lexer.token.value.ipv4);
lexer_get(&lexer);
uint32_t end = start + 1;
if (lexer_match(&lexer, LEX_T_ELLIPSIS)) {
if (lexer.token.type != LEX_T_INTEGER) {
lexer_syntax_error(&lexer, "expecting address range");
break;
}
end = ntohl(lexer.token.value.ipv4) + 1;
lexer_get(&lexer);
}
/* Clamp start...end to fit the subnet. */
start = MAX(od->ipam_info.start_ipv4, start);
end = MIN(od->ipam_info.start_ipv4 + od->ipam_info.total_ipv4s, end);
if (end > start) {
bitmap_set_multiple(od->ipam_info.allocated_ipv4s,
start - od->ipam_info.start_ipv4,
end - start, 1);
} else {
lexer_error(&lexer, "excluded addresses not in subnet");
}
}
if (lexer.error) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "logical switch "UUID_FMT": bad exclude_ips (%s)",
UUID_ARGS(&od->key), lexer.error);
}
lexer_destroy(&lexer);
}
static void
init_mcast_info_for_router_datapath(struct ovn_datapath *od)
{
struct mcast_router_info *mcast_rtr_info = &od->mcast_info.rtr;
mcast_rtr_info->relay = smap_get_bool(&od->nbr->options, "mcast_relay",
false);
}
static void
init_mcast_info_for_switch_datapath(struct ovn_datapath *od)
{
struct mcast_switch_info *mcast_sw_info = &od->mcast_info.sw;
mcast_sw_info->enabled =
smap_get_bool(&od->nbs->other_config, "mcast_snoop", false);
mcast_sw_info->querier =
smap_get_bool(&od->nbs->other_config, "mcast_querier", true);
mcast_sw_info->flood_unregistered =
smap_get_bool(&od->nbs->other_config, "mcast_flood_unregistered",
false);
mcast_sw_info->table_size =
smap_get_ullong(&od->nbs->other_config, "mcast_table_size",
OVN_MCAST_DEFAULT_MAX_ENTRIES);
uint32_t idle_timeout =
smap_get_ullong(&od->nbs->other_config, "mcast_idle_timeout",
OVN_MCAST_DEFAULT_IDLE_TIMEOUT_S);
if (idle_timeout < OVN_MCAST_MIN_IDLE_TIMEOUT_S) {
idle_timeout = OVN_MCAST_MIN_IDLE_TIMEOUT_S;
} else if (idle_timeout > OVN_MCAST_MAX_IDLE_TIMEOUT_S) {
idle_timeout = OVN_MCAST_MAX_IDLE_TIMEOUT_S;
}
mcast_sw_info->idle_timeout = idle_timeout;
uint32_t query_interval =
smap_get_ullong(&od->nbs->other_config, "mcast_query_interval",
mcast_sw_info->idle_timeout / 2);
if (query_interval < OVN_MCAST_MIN_QUERY_INTERVAL_S) {
query_interval = OVN_MCAST_MIN_QUERY_INTERVAL_S;
} else if (query_interval > OVN_MCAST_MAX_QUERY_INTERVAL_S) {
query_interval = OVN_MCAST_MAX_QUERY_INTERVAL_S;
}
mcast_sw_info->query_interval = query_interval;
mcast_sw_info->eth_src =
nullable_xstrdup(smap_get(&od->nbs->other_config, "mcast_eth_src"));
mcast_sw_info->ipv4_src =
nullable_xstrdup(smap_get(&od->nbs->other_config, "mcast_ip4_src"));
mcast_sw_info->ipv6_src =
nullable_xstrdup(smap_get(&od->nbs->other_config, "mcast_ip6_src"));
mcast_sw_info->query_max_response =
smap_get_ullong(&od->nbs->other_config, "mcast_query_max_response",
OVN_MCAST_DEFAULT_QUERY_MAX_RESPONSE_S);
mcast_sw_info->active_v4_flows = 0;
mcast_sw_info->active_v6_flows = 0;
}
static void
init_mcast_info_for_datapath(struct ovn_datapath *od)
{
if (!od->nbr && !od->nbs) {
return;
}
hmap_init(&od->mcast_info.group_tnlids);
od->mcast_info.group_tnlid_hint = OVN_MIN_IP_MULTICAST;
ovs_list_init(&od->mcast_info.groups);
if (od->nbs) {
init_mcast_info_for_switch_datapath(od);
} else {
init_mcast_info_for_router_datapath(od);
}
}
static void
destroy_mcast_info_for_switch_datapath(struct ovn_datapath *od)
{
struct mcast_switch_info *mcast_sw_info = &od->mcast_info.sw;
free(mcast_sw_info->eth_src);
free(mcast_sw_info->ipv4_src);
free(mcast_sw_info->ipv6_src);
}
static void
destroy_mcast_info_for_datapath(struct ovn_datapath *od)
{
if (!od->nbr && !od->nbs) {
return;
}
if (od->nbs) {
destroy_mcast_info_for_switch_datapath(od);
}
ovn_destroy_tnlids(&od->mcast_info.group_tnlids);
}
static void
store_mcast_info_for_switch_datapath(const struct sbrec_ip_multicast *sb,
struct ovn_datapath *od)
{
struct mcast_switch_info *mcast_sw_info = &od->mcast_info.sw;
sbrec_ip_multicast_set_datapath(sb, od->sb);
sbrec_ip_multicast_set_enabled(sb, &mcast_sw_info->enabled, 1);
sbrec_ip_multicast_set_querier(sb, &mcast_sw_info->querier, 1);
sbrec_ip_multicast_set_table_size(sb, &mcast_sw_info->table_size, 1);
sbrec_ip_multicast_set_idle_timeout(sb, &mcast_sw_info->idle_timeout, 1);
sbrec_ip_multicast_set_query_interval(sb,
&mcast_sw_info->query_interval, 1);
sbrec_ip_multicast_set_query_max_resp(sb,
&mcast_sw_info->query_max_response,
1);
if (mcast_sw_info->eth_src) {
sbrec_ip_multicast_set_eth_src(sb, mcast_sw_info->eth_src);
}
if (mcast_sw_info->ipv4_src) {
sbrec_ip_multicast_set_ip4_src(sb, mcast_sw_info->ipv4_src);
}
if (mcast_sw_info->ipv6_src) {
sbrec_ip_multicast_set_ip6_src(sb, mcast_sw_info->ipv6_src);
}
}
static void
ovn_datapath_update_external_ids(struct ovn_datapath *od)
{
/* Get the logical-switch or logical-router UUID to set in
* external-ids. */
char uuid_s[UUID_LEN + 1];
sprintf(uuid_s, UUID_FMT, UUID_ARGS(&od->key));
const char *key = od->nbs ? "logical-switch" : "logical-router";
/* Get names to set in external-ids. */
const char *name = od->nbs ? od->nbs->name : od->nbr->name;
const char *name2 = (od->nbs
? smap_get(&od->nbs->external_ids,
"neutron:network_name")
: smap_get(&od->nbr->external_ids,
"neutron:router_name"));