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ovsdb-server.c
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/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 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 <errno.h>
#include <getopt.h>
#include <inttypes.h>
#include <signal.h>
#include <sys/stat.h>
#include <unistd.h>
#include "column.h"
#include "command-line.h"
#include "daemon.h"
#include "dirs.h"
#include "dns-resolve.h"
#include "openvswitch/dynamic-string.h"
#include "fatal-signal.h"
#include "file.h"
#include "hash.h"
#include "openvswitch/json.h"
#include "jsonrpc.h"
#include "jsonrpc-server.h"
#include "openvswitch/list.h"
#include "memory.h"
#include "monitor.h"
#include "ovs-replay.h"
#include "ovsdb.h"
#include "ovsdb-data.h"
#include "ovsdb-types.h"
#include "ovsdb-error.h"
#include "openvswitch/poll-loop.h"
#include "process.h"
#include "replication.h"
#include "relay.h"
#include "row.h"
#include "simap.h"
#include "openvswitch/shash.h"
#include "stream-ssl.h"
#include "stream.h"
#include "sset.h"
#include "storage.h"
#include "table.h"
#include "timeval.h"
#include "transaction.h"
#include "trigger.h"
#include "util.h"
#include "unixctl.h"
#include "perf-counter.h"
#include "ovsdb-util.h"
#include "openvswitch/vlog.h"
VLOG_DEFINE_THIS_MODULE(ovsdb_server);
struct db {
char *filename;
struct ovsdb *db;
struct uuid row_uuid;
};
/* SSL configuration. */
static char *private_key_file;
static char *certificate_file;
static char *ca_cert_file;
static char *ssl_protocols;
static char *ssl_ciphers;
static bool bootstrap_ca_cert;
/* Try to reclaim heap memory back to system after DB compaction. */
static bool trim_memory = true;
static unixctl_cb_func ovsdb_server_exit;
static unixctl_cb_func ovsdb_server_compact;
static unixctl_cb_func ovsdb_server_memory_trim_on_compaction;
static unixctl_cb_func ovsdb_server_reconnect;
static unixctl_cb_func ovsdb_server_perf_counters_clear;
static unixctl_cb_func ovsdb_server_perf_counters_show;
static unixctl_cb_func ovsdb_server_disable_monitor_cond;
static unixctl_cb_func ovsdb_server_set_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_get_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_connect_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_disconnect_active_ovsdb_server;
static unixctl_cb_func ovsdb_server_set_active_ovsdb_server_probe_interval;
static unixctl_cb_func ovsdb_server_set_relay_source_interval;
static unixctl_cb_func ovsdb_server_set_sync_exclude_tables;
static unixctl_cb_func ovsdb_server_get_sync_exclude_tables;
static unixctl_cb_func ovsdb_server_get_sync_status;
static unixctl_cb_func ovsdb_server_get_db_storage_status;
struct server_config {
struct sset *remotes;
struct shash *all_dbs;
FILE *config_tmpfile;
char **sync_from;
char **sync_exclude;
bool *is_backup;
int *replication_probe_interval;
int *relay_source_probe_interval;
struct ovsdb_jsonrpc_server *jsonrpc;
};
static unixctl_cb_func ovsdb_server_add_remote;
static unixctl_cb_func ovsdb_server_remove_remote;
static unixctl_cb_func ovsdb_server_list_remotes;
static unixctl_cb_func ovsdb_server_add_database;
static unixctl_cb_func ovsdb_server_remove_database;
static unixctl_cb_func ovsdb_server_list_databases;
static unixctl_cb_func ovsdb_server_tlog_set;
static unixctl_cb_func ovsdb_server_tlog_list;
static void read_db(struct server_config *, struct db *);
static struct ovsdb_error *open_db(struct server_config *,
const char *filename)
OVS_WARN_UNUSED_RESULT;
static void add_server_db(struct server_config *);
static void remove_db(struct server_config *, struct shash_node *db, char *);
static void close_db(struct server_config *, struct db *, char *);
static void parse_options(int argc, char *argvp[],
struct sset *db_filenames, struct sset *remotes,
char **unixctl_pathp, char **run_command,
char **sync_from, char **sync_exclude,
bool *is_backup);
OVS_NO_RETURN static void usage(void);
static char *reconfigure_remotes(struct ovsdb_jsonrpc_server *,
const struct shash *all_dbs,
struct sset *remotes);
static char *reconfigure_ssl(const struct shash *all_dbs);
static void report_error_if_changed(char *error, char **last_errorp);
static void update_remote_status(const struct ovsdb_jsonrpc_server *jsonrpc,
const struct sset *remotes,
struct shash *all_dbs);
static void update_server_status(struct shash *all_dbs);
static void save_config__(FILE *config_file, const struct sset *remotes,
const struct sset *db_filenames,
const char *sync_from, const char *sync_exclude,
bool is_backup);
static void save_config(struct server_config *);
static void load_config(FILE *config_file, struct sset *remotes,
struct sset *db_filenames, char **sync_from,
char **sync_exclude, bool *is_backup);
static void
ovsdb_replication_init(const char *sync_from, const char *exclude,
struct shash *all_dbs, const struct uuid *server_uuid,
int probe_interval)
{
replication_init(sync_from, exclude, server_uuid, probe_interval);
struct shash_node *node;
SHASH_FOR_EACH (node, all_dbs) {
struct db *db = node->data;
if (node->name[0] != '_' && db->db) {
replication_add_local_db(node->name, db->db);
}
}
}
static void
log_and_free_error(struct ovsdb_error *error)
{
if (error) {
char *s = ovsdb_error_to_string_free(error);
VLOG_INFO("%s", s);
free(s);
}
}
static void
main_loop(struct server_config *config,
struct ovsdb_jsonrpc_server *jsonrpc, struct shash *all_dbs,
struct unixctl_server *unixctl, struct sset *remotes,
struct process *run_process, bool *exiting, bool *is_backup)
{
char *remotes_error, *ssl_error;
struct shash_node *node;
long long int status_timer = LLONG_MIN;
*exiting = false;
ssl_error = NULL;
remotes_error = NULL;
while (!*exiting) {
memory_run();
if (memory_should_report()) {
struct simap usage;
simap_init(&usage);
ovsdb_jsonrpc_server_get_memory_usage(jsonrpc, &usage);
ovsdb_monitor_get_memory_usage(&usage);
SHASH_FOR_EACH(node, all_dbs) {
struct db *db = node->data;
ovsdb_get_memory_usage(db->db, &usage);
}
memory_report(&usage);
simap_destroy(&usage);
}
/* Run unixctl_server_run() before reconfigure_remotes() because
* ovsdb-server/add-remote and ovsdb-server/remove-remote can change
* the set of remotes that reconfigure_remotes() uses. */
unixctl_server_run(unixctl);
ovsdb_jsonrpc_server_set_read_only(jsonrpc, *is_backup);
report_error_if_changed(
reconfigure_remotes(jsonrpc, all_dbs, remotes),
&remotes_error);
report_error_if_changed(reconfigure_ssl(all_dbs), &ssl_error);
ovsdb_jsonrpc_server_run(jsonrpc);
if (*is_backup) {
replication_run();
if (!replication_is_alive()) {
disconnect_active_server();
*is_backup = false;
}
}
ovsdb_relay_run();
SHASH_FOR_EACH_SAFE (node, all_dbs) {
struct db *db = node->data;
ovsdb_storage_run(db->db->storage);
read_db(config, db);
/* Run triggers after storage_run and read_db to make sure new raft
* updates are utilized in current iteration. */
if (ovsdb_trigger_run(db->db, time_msec())) {
/* The message below is currently the only reason to disconnect
* all clients. */
ovsdb_jsonrpc_server_reconnect(
jsonrpc, false,
xasprintf("committed %s database schema conversion",
db->db->name));
}
if (ovsdb_storage_is_dead(db->db->storage)) {
VLOG_INFO("%s: removing database because storage disconnected "
"permanently", node->name);
remove_db(config, node,
xasprintf("removing database %s because storage "
"disconnected permanently", node->name));
} else if (!ovsdb_snapshot_in_progress(db->db)
&& (ovsdb_storage_should_snapshot(db->db->storage) ||
ovsdb_snapshot_ready(db->db))) {
log_and_free_error(ovsdb_snapshot(db->db, trim_memory));
}
}
if (run_process) {
process_run();
if (process_exited(run_process)) {
*exiting = true;
}
}
/* update Manager status(es) every 2.5 seconds. Don't update if we're
* recording or performing replay. */
if (status_timer == LLONG_MIN ||
(!ovs_replay_is_active() && time_msec() >= status_timer)) {
status_timer = time_msec() + 2500;
update_remote_status(jsonrpc, remotes, all_dbs);
}
update_server_status(all_dbs);
memory_wait();
if (*is_backup) {
replication_wait();
}
ovsdb_relay_wait();
ovsdb_jsonrpc_server_wait(jsonrpc);
unixctl_server_wait(unixctl);
SHASH_FOR_EACH(node, all_dbs) {
struct db *db = node->data;
ovsdb_trigger_wait(db->db, time_msec());
ovsdb_storage_wait(db->db->storage);
ovsdb_storage_read_wait(db->db->storage);
ovsdb_snapshot_wait(db->db);
}
if (run_process) {
process_wait(run_process);
}
if (*exiting) {
poll_immediate_wake();
}
if (!ovs_replay_is_active()) {
poll_timer_wait_until(status_timer);
}
poll_block();
if (should_service_stop()) {
*exiting = true;
}
}
free(remotes_error);
}
int
main(int argc, char *argv[])
{
char *unixctl_path = NULL;
char *run_command = NULL;
struct unixctl_server *unixctl;
struct ovsdb_jsonrpc_server *jsonrpc;
struct sset remotes, db_filenames;
char *sync_from, *sync_exclude;
bool is_backup;
const char *db_filename;
struct process *run_process;
bool exiting;
int retval;
FILE *config_tmpfile;
struct server_config server_config;
struct shash all_dbs;
struct shash_node *node;
int replication_probe_interval = REPLICATION_DEFAULT_PROBE_INTERVAL;
int relay_source_probe_interval = RELAY_SOURCE_DEFAULT_PROBE_INTERVAL;
ovs_cmdl_proctitle_init(argc, argv);
set_program_name(argv[0]);
service_start(&argc, &argv);
fatal_ignore_sigpipe();
process_init();
dns_resolve_init(true);
bool active = false;
parse_options(argc, argv, &db_filenames, &remotes, &unixctl_path,
&run_command, &sync_from, &sync_exclude, &active);
is_backup = sync_from && !active;
daemon_become_new_user(false, false);
/* Create and initialize 'config_tmpfile' as a temporary file to hold
* ovsdb-server's most basic configuration, and then save our initial
* configuration to it. When --monitor is used, this preserves the effects
* of ovs-appctl commands such as ovsdb-server/add-remote (which saves the
* new configuration) across crashes. */
config_tmpfile = tmpfile();
if (!config_tmpfile) {
ovs_fatal(errno, "failed to create temporary file");
}
server_config.remotes = &remotes;
server_config.config_tmpfile = config_tmpfile;
save_config__(config_tmpfile, &remotes, &db_filenames, sync_from,
sync_exclude, is_backup);
daemonize_start(false, false);
/* Load the saved config. */
load_config(config_tmpfile, &remotes, &db_filenames, &sync_from,
&sync_exclude, &is_backup);
/* Start ovsdb jsonrpc server. When running as a backup server,
* jsonrpc connections are read only. Otherwise, both read
* and write transactions are allowed. */
jsonrpc = ovsdb_jsonrpc_server_create(is_backup);
shash_init(&all_dbs);
server_config.all_dbs = &all_dbs;
server_config.jsonrpc = jsonrpc;
server_config.sync_from = &sync_from;
server_config.sync_exclude = &sync_exclude;
server_config.is_backup = &is_backup;
server_config.replication_probe_interval = &replication_probe_interval;
server_config.relay_source_probe_interval = &relay_source_probe_interval;
perf_counters_init();
SSET_FOR_EACH (db_filename, &db_filenames) {
struct ovsdb_error *error = open_db(&server_config, db_filename);
if (error) {
char *s = ovsdb_error_to_string_free(error);
ovs_fatal(0, "%s", s);
}
}
add_server_db(&server_config);
char *error = reconfigure_remotes(jsonrpc, &all_dbs, &remotes);
if (!error) {
error = reconfigure_ssl(&all_dbs);
}
if (error) {
ovs_fatal(0, "%s", error);
}
retval = unixctl_server_create(unixctl_path, &unixctl);
if (retval) {
exit(EXIT_FAILURE);
}
if (run_command) {
char *run_argv[4];
run_argv[0] = "/bin/sh";
run_argv[1] = "-c";
run_argv[2] = run_command;
run_argv[3] = NULL;
retval = process_start(run_argv, &run_process);
if (retval) {
ovs_fatal(retval, "%s: process failed to start", run_command);
}
} else {
run_process = NULL;
}
daemonize_complete();
if (!run_command) {
/* ovsdb-server is usually a long-running process, in which case it
* makes plenty of sense to log the version, but --run makes
* ovsdb-server more like a command-line tool, so skip it. */
VLOG_INFO("%s (Open vSwitch) %s", program_name, VERSION);
}
unixctl_command_register("exit", "", 0, 0, ovsdb_server_exit, &exiting);
unixctl_command_register("ovsdb-server/compact", "", 0, 1,
ovsdb_server_compact, &all_dbs);
unixctl_command_register("ovsdb-server/memory-trim-on-compaction",
"on|off", 1, 1,
ovsdb_server_memory_trim_on_compaction, NULL);
unixctl_command_register("ovsdb-server/reconnect", "", 0, 0,
ovsdb_server_reconnect, jsonrpc);
unixctl_command_register("ovsdb-server/add-remote", "REMOTE", 1, 1,
ovsdb_server_add_remote, &server_config);
unixctl_command_register("ovsdb-server/remove-remote", "REMOTE", 1, 1,
ovsdb_server_remove_remote, &server_config);
unixctl_command_register("ovsdb-server/list-remotes", "", 0, 0,
ovsdb_server_list_remotes, &remotes);
unixctl_command_register("ovsdb-server/add-db", "DB", 1, 1,
ovsdb_server_add_database, &server_config);
unixctl_command_register("ovsdb-server/remove-db", "DB", 1, 1,
ovsdb_server_remove_database, &server_config);
unixctl_command_register("ovsdb-server/list-dbs", "", 0, 0,
ovsdb_server_list_databases, &all_dbs);
unixctl_command_register("ovsdb-server/tlog-set", "DB:TABLE on|off",
2, 2, ovsdb_server_tlog_set, &all_dbs);
unixctl_command_register("ovsdb-server/tlog-list", "",
0, 0, ovsdb_server_tlog_list, &all_dbs);
unixctl_command_register("ovsdb-server/perf-counters-show", "", 0, 0,
ovsdb_server_perf_counters_show, NULL);
unixctl_command_register("ovsdb-server/perf-counters-clear", "", 0, 0,
ovsdb_server_perf_counters_clear, NULL);
unixctl_command_register("ovsdb-server/set-active-ovsdb-server", "", 1, 1,
ovsdb_server_set_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/get-active-ovsdb-server", "", 0, 0,
ovsdb_server_get_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/connect-active-ovsdb-server", "",
0, 0, ovsdb_server_connect_active_ovsdb_server,
&server_config);
unixctl_command_register("ovsdb-server/disconnect-active-ovsdb-server", "",
0, 0, ovsdb_server_disconnect_active_ovsdb_server,
&server_config);
unixctl_command_register(
"ovsdb-server/set-active-ovsdb-server-probe-interval", "", 1, 1,
ovsdb_server_set_active_ovsdb_server_probe_interval, &server_config);
unixctl_command_register(
"ovsdb-server/set-relay-source-probe-interval", "", 1, 1,
ovsdb_server_set_relay_source_interval, &server_config);
unixctl_command_register("ovsdb-server/set-sync-exclude-tables", "",
0, 1, ovsdb_server_set_sync_exclude_tables,
&server_config);
unixctl_command_register("ovsdb-server/get-sync-exclude-tables", "",
0, 0, ovsdb_server_get_sync_exclude_tables,
NULL);
unixctl_command_register("ovsdb-server/sync-status", "",
0, 0, ovsdb_server_get_sync_status,
&server_config);
unixctl_command_register("ovsdb-server/get-db-storage-status", "DB", 1, 1,
ovsdb_server_get_db_storage_status,
&server_config);
/* Simulate the behavior of OVS release prior to version 2.5 that
* does not support the monitor_cond method. */
unixctl_command_register("ovsdb-server/disable-monitor-cond", "", 0, 0,
ovsdb_server_disable_monitor_cond, jsonrpc);
if (is_backup) {
const struct uuid *server_uuid;
server_uuid = ovsdb_jsonrpc_server_get_uuid(jsonrpc);
ovsdb_replication_init(sync_from, sync_exclude, &all_dbs, server_uuid,
replication_probe_interval);
}
main_loop(&server_config, jsonrpc, &all_dbs, unixctl, &remotes,
run_process, &exiting, &is_backup);
SHASH_FOR_EACH_SAFE (node, &all_dbs) {
struct db *db = node->data;
close_db(&server_config, db, NULL);
shash_delete(&all_dbs, node);
}
ovsdb_jsonrpc_server_destroy(jsonrpc);
shash_destroy(&all_dbs);
sset_destroy(&remotes);
sset_destroy(&db_filenames);
free(sync_from);
free(sync_exclude);
unixctl_server_destroy(unixctl);
replication_destroy();
if (run_process && process_exited(run_process)) {
int status = process_status(run_process);
if (status) {
ovs_fatal(0, "%s: child exited, %s",
run_command, process_status_msg(status));
}
}
dns_resolve_destroy();
perf_counters_destroy();
service_stop();
return 0;
}
/* Returns true if 'filename' is known to be already open as a database,
* false if not.
*
* "False negatives" are possible. */
static bool
is_already_open(struct server_config *config OVS_UNUSED,
const char *filename OVS_UNUSED)
{
#ifndef _WIN32
struct stat s;
if (!stat(filename, &s)) {
struct shash_node *node;
SHASH_FOR_EACH (node, config->all_dbs) {
struct db *db = node->data;
struct stat s2;
if (!stat(db->filename, &s2)
&& s.st_dev == s2.st_dev
&& s.st_ino == s2.st_ino) {
return true;
}
}
}
#endif /* !_WIN32 */
return false;
}
static void
close_db(struct server_config *config, struct db *db, char *comment)
{
if (db) {
ovsdb_jsonrpc_server_remove_db(config->jsonrpc, db->db, comment);
if (db->db->is_relay) {
ovsdb_relay_del_db(db->db);
}
ovsdb_destroy(db->db);
free(db->filename);
free(db);
} else {
free(comment);
}
}
static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
update_schema(struct ovsdb *db,
const struct ovsdb_schema *schema,
const struct uuid *txnid,
bool conversion_with_no_data, void *aux)
{
struct server_config *config = aux;
if (!db->schema || strcmp(schema->version, db->schema->version)) {
ovsdb_jsonrpc_server_reconnect(
config->jsonrpc, false,
(db->schema
? xasprintf("database %s schema changed", db->name)
: xasprintf("database %s connected to storage", db->name)));
}
if (db->schema && conversion_with_no_data) {
struct ovsdb *new_db = NULL;
struct ovsdb_error *error;
/* If conversion was triggered by the current process, we might
* already have converted version of a database. */
new_db = ovsdb_trigger_find_and_steal_converted_db(db, txnid);
if (!new_db) {
/* No luck. Converting. */
error = ovsdb_convert(db, schema, &new_db);
if (error) {
/* Should never happen, because conversion should have been
* checked before writing the schema to the storage. */
return error;
}
}
ovsdb_replace(db, new_db);
} else {
ovsdb_replace(db, ovsdb_create(ovsdb_schema_clone(schema), NULL));
}
/* Force update to schema in _Server database. */
struct db *dbp = shash_find_data(config->all_dbs, db->name);
if (dbp) {
dbp->row_uuid = UUID_ZERO;
}
return NULL;
}
static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
parse_txn(struct server_config *config, struct db *db,
const struct ovsdb_schema *schema, const struct json *txn_json,
const struct uuid *txnid)
{
struct ovsdb_error *error = NULL;
struct ovsdb_txn *txn = NULL;
if (schema) {
/* We're replacing the schema (and the data). If transaction includes
* replacement data, destroy the database (first grabbing its storage),
* then replace it with the new schema. If not, it's a conversion
* without data specified. In this case, convert the current database
* to a new schema instead.
*
* Only clustered database schema changes and snapshot installs
* go through this path.
*/
ovs_assert(ovsdb_storage_is_clustered(db->db->storage));
error = ovsdb_schema_check_for_ephemeral_columns(schema);
if (error) {
return error;
}
error = update_schema(db->db, schema, txnid, txn_json == NULL, config);
if (error) {
return error;
}
}
if (txn_json) {
if (!db->db->schema) {
return ovsdb_error(NULL, "%s: data without schema", db->filename);
}
error = ovsdb_file_txn_from_json(db->db, txn_json, false, &txn);
if (error) {
ovsdb_storage_unread(db->db->storage);
return error;
}
} else if (schema) {
/* We just performed conversion without data. Transaction history
* was destroyed. Commit a dummy transaction to set the txnid. */
txn = ovsdb_txn_create(db->db);
}
if (txn) {
ovsdb_txn_set_txnid(txnid, txn);
error = ovsdb_txn_replay_commit(txn);
if (!error && !uuid_is_zero(txnid)) {
db->db->prereq = *txnid;
}
ovsdb_txn_history_run(db->db);
}
return error;
}
static void
read_db(struct server_config *config, struct db *db)
{
struct ovsdb_error *error;
for (;;) {
struct ovsdb_schema *schema;
struct json *txn_json;
struct uuid txnid;
error = ovsdb_storage_read(db->db->storage, &schema, &txn_json,
&txnid);
if (error) {
break;
} else if (!schema && !txn_json) {
/* End of file. */
return;
} else {
error = parse_txn(config, db, schema, txn_json, &txnid);
json_destroy(txn_json);
ovsdb_schema_destroy(schema);
if (error) {
break;
}
}
}
/* Log error but otherwise ignore it. Probably the database just
* got truncated due to power failure etc. and we should use its
* current contents. */
char *msg = ovsdb_error_to_string_free(error);
VLOG_ERR("%s", msg);
free(msg);
}
static void
add_db(struct server_config *config, struct db *db)
{
db->row_uuid = UUID_ZERO;
shash_add_assert(config->all_dbs, db->db->name, db);
}
static struct ovsdb_error * OVS_WARN_UNUSED_RESULT
open_db(struct server_config *config, const char *filename)
{
const char *relay_prefix = "relay:";
const char *relay_remotes = NULL;
const int relay_prefix_len = strlen(relay_prefix);
struct ovsdb_storage *storage;
struct ovsdb_error *error;
bool is_relay;
char *name;
is_relay = !strncmp(filename, relay_prefix, relay_prefix_len);
if (!is_relay) {
/* If we know that the file is already open, return a good error
* message. Otherwise, if the file is open, we'll fail later on with
* a harder to interpret file locking error. */
if (is_already_open(config, filename)) {
return ovsdb_error(NULL, "%s: already open", filename);
}
error = ovsdb_storage_open(filename, true, &storage);
if (error) {
return error;
}
name = xstrdup(filename);
} else {
/* Parsing the relay in format 'relay:DB_NAME:<list of remotes>'*/
relay_remotes = strchr(filename + relay_prefix_len, ':');
if (!relay_remotes || relay_remotes[0] == '\0') {
return ovsdb_error(NULL, "%s: invalid syntax", filename);
}
name = xmemdup0(filename, relay_remotes - filename);
storage = ovsdb_storage_create_unbacked(name + relay_prefix_len);
relay_remotes++; /* Skip the ':'. */
}
struct ovsdb_schema *schema;
if (is_relay || ovsdb_storage_is_clustered(storage)) {
schema = NULL;
} else {
struct json *txn_json;
error = ovsdb_storage_read(storage, &schema, &txn_json, NULL);
if (error) {
ovsdb_storage_close(storage);
free(name);
return error;
}
ovs_assert(schema && !txn_json);
}
struct db *db = xzalloc(sizeof *db);
db->filename = name;
db->db = ovsdb_create(schema, storage);
ovsdb_jsonrpc_server_add_db(config->jsonrpc, db->db);
/* Enable txn history for clustered and relay modes. It is not enabled for
* other modes for now, since txn id is available for clustered and relay
* modes only. */
ovsdb_txn_history_init(db->db,
is_relay || ovsdb_storage_is_clustered(storage));
read_db(config, db);
error = (db->db->name[0] == '_'
? ovsdb_error(NULL, "%s: names beginning with \"_\" are reserved",
db->db->name)
: shash_find(config->all_dbs, db->db->name)
? ovsdb_error(NULL, "%s: duplicate database name", db->db->name)
: NULL);
if (error) {
char *error_s = ovsdb_error_to_string(error);
close_db(config, db,
xasprintf("cannot complete opening %s database (%s)",
db->db->name, error_s));
free(error_s);
return error;
}
add_db(config, db);
if (is_relay) {
ovsdb_relay_add_db(db->db, relay_remotes, update_schema, config,
*config->relay_source_probe_interval);
}
return NULL;
}
/* Add the internal _Server database to the server configuration. */
static void
add_server_db(struct server_config *config)
{
struct json *schema_json = json_from_string(
#include "ovsdb/_server.ovsschema.inc"
);
ovs_assert(schema_json->type == JSON_OBJECT);
struct ovsdb_schema *schema;
struct ovsdb_error *error OVS_UNUSED = ovsdb_schema_from_json(schema_json,
&schema);
ovs_assert(!error);
json_destroy(schema_json);
struct db *db = xzalloc(sizeof *db);
/* We don't need txn_history for server_db. */
db->filename = xstrdup("<internal>");
db->db = ovsdb_create(schema, ovsdb_storage_create_unbacked(NULL));
bool ok OVS_UNUSED = ovsdb_jsonrpc_server_add_db(config->jsonrpc, db->db);
ovs_assert(ok);
add_db(config, db);
}
static char * OVS_WARN_UNUSED_RESULT
parse_db_column__(const struct shash *all_dbs,
const char *name_, char *name,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
const char *db_name, *table_name, *column_name;
const char *tokens[3];
char *save_ptr = NULL;
*dbp = NULL;
*tablep = NULL;
*columnp = NULL;
strtok_r(name, ":", &save_ptr); /* "db:" */
tokens[0] = strtok_r(NULL, ",", &save_ptr);
tokens[1] = strtok_r(NULL, ",", &save_ptr);
tokens[2] = strtok_r(NULL, ",", &save_ptr);
if (!tokens[0] || !tokens[1] || !tokens[2]) {
return xasprintf("\"%s\": invalid syntax", name_);
}
db_name = tokens[0];
table_name = tokens[1];
column_name = tokens[2];
*dbp = shash_find_data(all_dbs, tokens[0]);
if (!*dbp) {
return xasprintf("\"%s\": no database named %s", name_, db_name);
}
*tablep = ovsdb_get_table((*dbp)->db, table_name);
if (!*tablep) {
return xasprintf("\"%s\": no table named %s", name_, table_name);
}
*columnp = ovsdb_table_schema_get_column((*tablep)->schema, column_name);
if (!*columnp) {
return xasprintf("\"%s\": table \"%s\" has no column \"%s\"",
name_, table_name, column_name);
}
return NULL;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. */
static char * OVS_WARN_UNUSED_RESULT
parse_db_column(const struct shash *all_dbs,
const char *name_,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
char *name = xstrdup(name_);
char *retval = parse_db_column__(all_dbs, name_, name,
dbp, tablep, columnp);
free(name);
return retval;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. */
static char * OVS_WARN_UNUSED_RESULT
parse_db_string_column(const struct shash *all_dbs,
const char *name,
const struct db **dbp,
const struct ovsdb_table **tablep,
const struct ovsdb_column **columnp)
{
char *retval;
retval = parse_db_column(all_dbs, name, dbp, tablep, columnp);
if (retval) {
return retval;
}
if ((*columnp)->type.key.type != OVSDB_TYPE_STRING
|| (*columnp)->type.value.type != OVSDB_TYPE_VOID) {
return xasprintf("\"%s\": table \"%s\" column \"%s\" is "
"not string or set of strings",
name, (*tablep)->schema->name, (*columnp)->name);
}
return NULL;
}
static const char *
query_db_string(const struct shash *all_dbs, const char *name,
struct ds *errors)
{
if (!name || strncmp(name, "db:", 3)) {
return name;
} else {
const struct ovsdb_column *column;
const struct ovsdb_table *table;
const struct ovsdb_row *row;
const struct db *db;
char *retval;
retval = parse_db_string_column(all_dbs, name,
&db, &table, &column);
if (retval) {
if (db && !db->db->schema) {
/* 'db' is a clustered database but it hasn't connected to the
* cluster yet, so we can't get anything out of it, not even a
* schema. Not really an error. */
} else {
ds_put_format(errors, "%s\n", retval);
}
free(retval);
return NULL;
}
HMAP_FOR_EACH (row, hmap_node, &table->rows) {
const struct ovsdb_datum *datum;
size_t i;
datum = &row->fields[column->index];
for (i = 0; i < datum->n; i++) {
const char *key = json_string(datum->keys[i].s);
if (key[0]) {
return key;
}
}
}
return NULL;
}
}
static struct ovsdb_jsonrpc_options *
add_remote(struct shash *remotes, const char *target)
{
struct ovsdb_jsonrpc_options *options;
options = shash_find_data(remotes, target);
if (!options) {
options = ovsdb_jsonrpc_default_options(target);
shash_add(remotes, target, options);
}
return options;
}
static void
free_remotes(struct shash *remotes)
{
if (remotes) {
struct shash_node *node;
SHASH_FOR_EACH (node, remotes) {
struct ovsdb_jsonrpc_options *options = node->data;
free(options->role);
}
shash_destroy_free_data(remotes);
}
}
/* Adds a remote and options to 'remotes', based on the Manager table row in
* 'row'. */
static void