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/*
* Copyright (c) 2024, Red Hat, 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>
/* OpenvSwitch lib includes. */
#include "openvswitch/vlog.h"
#include "lib/smap.h"
/* OVN includes */
#include "lb.h"
#include "lib/ovn-sb-idl.h"
#include "ovn/lex.h"
VLOG_DEFINE_THIS_MODULE(controller_lb);
static void
ovn_lb_get_hairpin_snat_ip(const struct uuid *lb_uuid,
const struct smap *lb_options,
struct lport_addresses *hairpin_addrs)
{
const char *addresses = smap_get(lb_options, "hairpin_snat_ip");
if (!addresses) {
return;
}
if (!extract_ip_address(addresses, hairpin_addrs)) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
VLOG_WARN_RL(&rl, "bad hairpin_snat_ip %s in load balancer "UUID_FMT,
addresses, UUID_ARGS(lb_uuid));
}
}
struct ovn_controller_lb *
ovn_controller_lb_create(const struct sbrec_load_balancer *sbrec_lb,
const struct smap *template_vars,
struct sset *template_vars_ref)
{
struct ovn_controller_lb *lb = xzalloc(sizeof *lb);
lb->slb = sbrec_lb;
lb->n_vips = smap_count(&sbrec_lb->vips);
lb->vips = xcalloc(lb->n_vips, sizeof *lb->vips);
struct smap_node *node;
size_t n_vips = 0;
SMAP_FOR_EACH (node, &sbrec_lb->vips) {
struct ovn_lb_vip *lb_vip = &lb->vips[n_vips];
struct lex_str key_s;
if (!lexer_parse_template_string(&key_s, node->key, template_vars,
template_vars_ref)) {
continue;
}
struct lex_str value_s;
if (!lexer_parse_template_string(&value_s, node->value, template_vars,
template_vars_ref)) {
continue;
}
char *error = ovn_lb_vip_init_explicit(lb_vip, lex_str_get(&key_s),
lex_str_get(&value_s));
if (error) {
free(error);
} else {
n_vips++;
}
lex_str_free(&key_s);
lex_str_free(&value_s);
}
lb->proto = IPPROTO_TCP;
if (sbrec_lb->protocol && sbrec_lb->protocol[0]) {
if (!strcmp(sbrec_lb->protocol, "udp")) {
lb->proto = IPPROTO_UDP;
} else if (!strcmp(sbrec_lb->protocol, "sctp")) {
lb->proto = IPPROTO_SCTP;
}
}
/* It's possible that parsing VIPs fails. Update the lb->n_vips to the
* correct value.
*/
lb->n_vips = n_vips;
lb->ct_flush = smap_get_bool(&sbrec_lb->options, "ct_flush", false);
ovn_lb_get_hairpin_snat_ip(&sbrec_lb->header_.uuid, &sbrec_lb->options,
&lb->hairpin_snat_ips);
return lb;
}
void
ovn_controller_lb_destroy(struct ovn_controller_lb *lb)
{
for (size_t i = 0; i < lb->n_vips; i++) {
ovn_lb_vip_destroy(&lb->vips[i]);
}
free(lb->vips);
destroy_lport_addresses(&lb->hairpin_snat_ips);
free(lb);
}
void
ovn_controller_lbs_destroy(struct hmap *ovn_controller_lbs)
{
struct ovn_controller_lb *lb;
HMAP_FOR_EACH_POP (lb, hmap_node, ovn_controller_lbs) {
ovn_controller_lb_destroy(lb);
}
hmap_destroy(ovn_controller_lbs);
}
struct ovn_controller_lb *
ovn_controller_lb_find(const struct hmap *ovn_controller_lbs,
const struct uuid *uuid)
{
struct ovn_controller_lb *lb;
size_t hash = uuid_hash(uuid);
HMAP_FOR_EACH_WITH_HASH (lb, hmap_node, hash, ovn_controller_lbs) {
if (uuid_equals(&lb->slb->header_.uuid, uuid)) {
return lb;
}
}
return NULL;
}
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