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/* Copyright (c) 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 <unistd.h>
#include "chassis.h"
#include "lib/smap.h"
#include "lib/vswitch-idl.h"
#include "openvswitch/dynamic-string.h"
#include "openvswitch/vlog.h"
#include "ovn/lib/ovn-sb-idl.h"
#include "ovn-controller.h"
#include "lib/util.h"
VLOG_DEFINE_THIS_MODULE(chassis);
#ifndef HOST_NAME_MAX
/* For windows. */
#define HOST_NAME_MAX 255
#endif /* HOST_NAME_MAX */
void
chassis_register_ovs_idl(struct ovsdb_idl *ovs_idl)
{
ovsdb_idl_add_table(ovs_idl, &ovsrec_table_open_vswitch);
ovsdb_idl_add_column(ovs_idl, &ovsrec_open_vswitch_col_external_ids);
}
static const char *
pop_tunnel_name(uint32_t *type)
{
if (*type & GENEVE) {
*type &= ~GENEVE;
return "geneve";
} else if (*type & STT) {
*type &= ~STT;
return "stt";
} else if (*type & VXLAN) {
*type &= ~VXLAN;
return "vxlan";
}
OVS_NOT_REACHED();
}
static const char *
get_bridge_mappings(const struct smap *ext_ids)
{
const char *bridge_mappings = smap_get(ext_ids, "ovn-bridge-mappings");
return bridge_mappings ? bridge_mappings : "";
}
void
chassis_run(struct controller_ctx *ctx, const char *chassis_id)
{
if (!ctx->ovnsb_idl_txn) {
return;
}
const struct ovsrec_open_vswitch *cfg;
const char *encap_type, *encap_ip;
static bool inited = false;
cfg = ovsrec_open_vswitch_first(ctx->ovs_idl);
if (!cfg) {
VLOG_INFO("No Open_vSwitch row defined.");
return;
}
encap_type = smap_get(&cfg->external_ids, "ovn-encap-type");
encap_ip = smap_get(&cfg->external_ids, "ovn-encap-ip");
if (!encap_type || !encap_ip) {
VLOG_INFO("Need to specify an encap type and ip");
return;
}
char *tokstr = xstrdup(encap_type);
char *save_ptr = NULL;
char *token;
uint32_t req_tunnels = 0;
for (token = strtok_r(tokstr, ",", &save_ptr); token != NULL;
token = strtok_r(NULL, ",", &save_ptr)) {
uint32_t type = get_tunnel_type(token);
if (!type) {
VLOG_INFO("Unknown tunnel type: %s", token);
}
req_tunnels |= type;
}
free(tokstr);
const char *hostname = smap_get(&cfg->external_ids, "hostname");
char hostname_[HOST_NAME_MAX + 1];
if (!hostname || !hostname[0]) {
if (gethostname(hostname_, sizeof hostname_)) {
hostname_[0] = '\0';
}
hostname = hostname_;
}
const char *bridge_mappings = get_bridge_mappings(&cfg->external_ids);
const struct sbrec_chassis *chassis_rec
= get_chassis(ctx->ovnsb_idl, chassis_id);
if (chassis_rec) {
if (strcmp(hostname, chassis_rec->hostname)) {
sbrec_chassis_set_hostname(chassis_rec, hostname);
}
const char *chassis_bridge_mappings
= get_bridge_mappings(&chassis_rec->external_ids);
if (strcmp(bridge_mappings, chassis_bridge_mappings)) {
struct smap new_ids;
smap_clone(&new_ids, &chassis_rec->external_ids);
smap_replace(&new_ids, "ovn-bridge-mappings", bridge_mappings);
sbrec_chassis_verify_external_ids(chassis_rec);
sbrec_chassis_set_external_ids(chassis_rec, &new_ids);
smap_destroy(&new_ids);
}
/* Compare desired tunnels against those currently in the database. */
uint32_t cur_tunnels = 0;
bool same = true;
for (int i = 0; i < chassis_rec->n_encaps; i++) {
cur_tunnels |= get_tunnel_type(chassis_rec->encaps[i]->type);
same = same && !strcmp(chassis_rec->encaps[i]->ip, encap_ip);
}
same = same && req_tunnels == cur_tunnels;
if (same) {
/* Nothing changed. */
inited = true;
return;
} else if (!inited) {
struct ds cur_encaps = DS_EMPTY_INITIALIZER;
for (int i = 0; i < chassis_rec->n_encaps; i++) {
ds_put_format(&cur_encaps, "%s,",
chassis_rec->encaps[i]->type);
}
ds_chomp(&cur_encaps, ',');
VLOG_WARN("Chassis config changing on startup, make sure "
"multiple chassis are not configured : %s/%s->%s/%s",
ds_cstr(&cur_encaps),
chassis_rec->encaps[0]->ip,
encap_type, encap_ip);
ds_destroy(&cur_encaps);
}
}
ovsdb_idl_txn_add_comment(ctx->ovnsb_idl_txn,
"ovn-controller: registering chassis '%s'",
chassis_id);
if (!chassis_rec) {
struct smap ext_ids = SMAP_CONST1(&ext_ids, "ovn-bridge-mappings",
bridge_mappings);
chassis_rec = sbrec_chassis_insert(ctx->ovnsb_idl_txn);
sbrec_chassis_set_name(chassis_rec, chassis_id);
sbrec_chassis_set_hostname(chassis_rec, hostname);
sbrec_chassis_set_external_ids(chassis_rec, &ext_ids);
}
int n_encaps = count_1bits(req_tunnels);
struct sbrec_encap **encaps = xmalloc(n_encaps * sizeof *encaps);
for (int i = 0; i < n_encaps; i++) {
const char *type = pop_tunnel_name(&req_tunnels);
encaps[i] = sbrec_encap_insert(ctx->ovnsb_idl_txn);
sbrec_encap_set_type(encaps[i], type);
sbrec_encap_set_ip(encaps[i], encap_ip);
}
sbrec_chassis_set_encaps(chassis_rec, encaps, n_encaps);
free(encaps);
inited = true;
}
/* Returns true if the database is all cleaned up, false if more work is
* required. */
bool
chassis_cleanup(struct controller_ctx *ctx, const char *chassis_id)
{
if (!chassis_id) {
return true;
}
/* Delete Chassis row. */
const struct sbrec_chassis *chassis_rec
= get_chassis(ctx->ovnsb_idl, chassis_id);
if (!chassis_rec) {
return true;
}
if (ctx->ovnsb_idl_txn) {
ovsdb_idl_txn_add_comment(ctx->ovnsb_idl_txn,
"ovn-controller: unregistering chassis '%s'",
chassis_id);
sbrec_chassis_delete(chassis_rec);
}
return false;
}
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