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/* Copyright (c) 2025, 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>
#include "evpn-binding.h"
#include "neighbor-exchange.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/vlog.h"
#include "packets.h"
#include "unixctl.h"
#include "evpn-fdb.h"
VLOG_DEFINE_THIS_MODULE(evpn_fdb);
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 1);
static struct evpn_fdb *evpn_fdb_add(struct hmap *evpn_fdbs, struct eth_addr);
static struct evpn_fdb *evpn_fdb_find(const struct hmap *evpn_fdbs,
struct eth_addr);
void
evpn_fdb_run(const struct evpn_fdb_ctx_in *f_ctx_in,
struct evpn_fdb_ctx_out *f_ctx_out)
{
struct hmapx stale_fdbs = HMAPX_INITIALIZER(&stale_fdbs);
struct evpn_fdb *fdb;
HMAP_FOR_EACH (fdb, hmap_node, f_ctx_out->fdbs) {
hmapx_add(&stale_fdbs, fdb);
}
const struct evpn_static_fdb *static_fdb;
HMAP_FOR_EACH (static_fdb, hmap_node, f_ctx_in->static_fdbs) {
const struct evpn_binding *binding =
evpn_binding_find(f_ctx_in->bindings, &static_fdb->ip,
static_fdb->vni);
if (!binding) {
VLOG_WARN_RL(&rl, "Couldn't find EVPN binding for "ETH_ADDR_FMT" "
"MAC address.", ETH_ADDR_ARGS(static_fdb->mac));
continue;
}
fdb = evpn_fdb_find(f_ctx_out->fdbs, static_fdb->mac);
if (!fdb) {
fdb = evpn_fdb_add(f_ctx_out->fdbs, static_fdb->mac);
}
bool updated = false;
if (fdb->binding_key != binding->binding_key) {
fdb->binding_key = binding->binding_key;
updated = true;
}
if (fdb->dp_key != binding->dp_key) {
fdb->dp_key = binding->dp_key;
updated = true;
}
if (updated) {
hmapx_add(f_ctx_out->updated_fdbs, fdb);
}
hmapx_find_and_delete(&stale_fdbs, fdb);
}
struct hmapx_node *node;
HMAPX_FOR_EACH (node, &stale_fdbs) {
fdb = node->data;
uuidset_insert(f_ctx_out->removed_fdbs, &fdb->flow_uuid);
hmap_remove(f_ctx_out->fdbs, &fdb->hmap_node);
free(fdb);
}
hmapx_destroy(&stale_fdbs);
}
void
evpn_fdbs_destroy(struct hmap *fdbs)
{
struct evpn_fdb *fdb;
HMAP_FOR_EACH_POP (fdb, hmap_node, fdbs) {
free(fdb);
}
hmap_destroy(fdbs);
}
void
evpn_fdb_list(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *data_)
{
struct hmap *fdbs = data_;
struct ds ds = DS_EMPTY_INITIALIZER;
const struct evpn_fdb *fdb;
HMAP_FOR_EACH (fdb, hmap_node, fdbs) {
ds_put_format(&ds, "UUID: "UUID_FMT", MAC: "ETH_ADDR_FMT", "
"binding_key: %#"PRIx32", dp_key: %"PRIu32"\n",
UUID_ARGS(&fdb->flow_uuid), ETH_ADDR_ARGS(fdb->mac),
fdb->binding_key, fdb->dp_key);
}
unixctl_command_reply(conn, ds_cstr_ro(&ds));
ds_destroy(&ds);
}
static struct evpn_fdb *
evpn_fdb_add(struct hmap *evpn_fdbs, struct eth_addr mac)
{
struct evpn_fdb *fdb = xmalloc(sizeof *fdb);
*fdb = (struct evpn_fdb) {
.flow_uuid = uuid_random(),
.mac = mac,
.binding_key = 0,
.dp_key = 0,
};
uint32_t hash = hash_bytes(&mac, sizeof mac, 0);
hmap_insert(evpn_fdbs, &fdb->hmap_node, hash);
return fdb;
}
static struct evpn_fdb *
evpn_fdb_find(const struct hmap *evpn_fdbs, struct eth_addr mac)
{
uint32_t hash = hash_bytes(&mac, sizeof mac, 0);
struct evpn_fdb *fdb;
HMAP_FOR_EACH_WITH_HASH (fdb, hmap_node, hash, evpn_fdbs) {
if (eth_addr_equals(fdb->mac, mac)) {
return fdb;
}
}
return NULL;
}
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