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openvswitch/ovsdb/ovsdb-server.c
Ben Pfaff ebed9f7859 ovsdb-server: Improve message for "add-db" of database already open. 
Otherwise you get a fairly obscure message about a lockfile already being
locked.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>
2014-04-07 10:23:35 -07:00

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/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014 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 "dummy.h"
#include "dynamic-string.h"
#include "fatal-signal.h"
#include "file.h"
#include "hash.h"
#include "json.h"
#include "jsonrpc.h"
#include "jsonrpc-server.h"
#include "list.h"
#include "memory.h"
#include "ovsdb.h"
#include "ovsdb-data.h"
#include "ovsdb-types.h"
#include "ovsdb-error.h"
#include "poll-loop.h"
#include "process.h"
#include "row.h"
#include "simap.h"
#include "shash.h"
#include "stream-ssl.h"
#include "stream.h"
#include "sset.h"
#include "table.h"
#include "timeval.h"
#include "transaction.h"
#include "trigger.h"
#include "util.h"
#include "unixctl.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(ovsdb_server);
struct db {
/* Initialized in main(). */
char *filename;
struct ovsdb_file *file;
struct ovsdb *db;
/* Only used by update_remote_status(). */
struct ovsdb_txn *txn;
};
/* SSL configuration. */
static char *private_key_file;
static char *certificate_file;
static char *ca_cert_file;
static bool bootstrap_ca_cert;
static unixctl_cb_func ovsdb_server_exit;
static unixctl_cb_func ovsdb_server_compact;
static unixctl_cb_func ovsdb_server_reconnect;
struct server_config {
struct sset *remotes;
struct shash *all_dbs;
FILE *config_tmpfile;
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 char *open_db(struct server_config *config, const char *filename);
static void parse_options(int *argc, char **argvp[],
struct sset *remotes, char **unixctl_pathp,
char **run_command);
static void usage(void) NO_RETURN;
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 save_config__(FILE *config_file, const struct sset *remotes,
const struct sset *db_filenames);
static void save_config(struct server_config *);
static void load_config(FILE *config_file, struct sset *remotes,
struct sset *db_filenames);
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;
const char *db_filename;
struct process *run_process;
bool exiting;
int retval;
long long int status_timer = LLONG_MIN;
FILE *config_tmpfile;
struct server_config server_config;
struct shash all_dbs;
struct shash_node *node;
char *remotes_error, *ssl_error;
char *error;
int i;
proctitle_init(argc, argv);
set_program_name(argv[0]);
service_start(&argc, &argv);
fatal_ignore_sigpipe();
process_init();
parse_options(&argc, &argv, &remotes, &unixctl_path, &run_command);
/* 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");
}
sset_init(&db_filenames);
if (argc > 0) {
for (i = 0; i < argc; i++) {
sset_add(&db_filenames, argv[i]);
}
} else {
char *default_db = xasprintf("%s/conf.db", ovs_dbdir());
sset_add(&db_filenames, default_db);
free(default_db);
}
server_config.remotes = &remotes;
server_config.config_tmpfile = config_tmpfile;
save_config__(config_tmpfile, &remotes, &db_filenames);
daemonize_start();
/* Load the saved config. */
load_config(config_tmpfile, &remotes, &db_filenames);
jsonrpc = ovsdb_jsonrpc_server_create();
shash_init(&all_dbs);
server_config.all_dbs = &all_dbs;
server_config.jsonrpc = jsonrpc;
SSET_FOR_EACH (db_filename, &db_filenames) {
error = open_db(&server_config, db_filename);
if (error) {
ovs_fatal(0, "%s", error);
}
}
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/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);
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);
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);
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);
SHASH_FOR_EACH(node, &all_dbs) {
struct db *db = node->data;
ovsdb_trigger_run(db->db, time_msec());
}
if (run_process) {
process_run();
if (process_exited(run_process)) {
exiting = true;
}
}
/* update Manager status(es) every 5 seconds */
if (time_msec() >= status_timer) {
status_timer = time_msec() + 5000;
update_remote_status(jsonrpc, &remotes, &all_dbs);
}
memory_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());
}
if (run_process) {
process_wait(run_process);
}
if (exiting) {
poll_immediate_wake();
}
poll_timer_wait_until(status_timer);
poll_block();
if (should_service_stop()) {
exiting = true;
}
}
ovsdb_jsonrpc_server_destroy(jsonrpc);
SHASH_FOR_EACH(node, &all_dbs) {
struct db *db = node->data;
ovsdb_destroy(db->db);
}
sset_destroy(&remotes);
unixctl_server_destroy(unixctl);
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));
}
}
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 char *
open_db(struct server_config *config, const char *filename)
{
struct ovsdb_error *db_error;
struct db *db;
char *error;
/* 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 xasprintf("%s: already open", filename);
}
db = xzalloc(sizeof *db);
db->filename = xstrdup(filename);
db_error = ovsdb_file_open(db->filename, false, &db->db, &db->file);
if (db_error) {
error = ovsdb_error_to_string(db_error);
} else if (!ovsdb_jsonrpc_server_add_db(config->jsonrpc, db->db)) {
error = xasprintf("%s: duplicate database name", db->db->schema->name);
} else {
shash_add_assert(config->all_dbs, db->db->schema->name, db);
return NULL;
}
ovsdb_error_destroy(db_error);
ovsdb_destroy(db->db);
free(db->filename);
free(db);
return error;
}
static const struct db *
find_db(const struct shash *all_dbs, const char *db_name)
{
struct shash_node *node;
SHASH_FOR_EACH(node, all_dbs) {
struct db *db = node->data;
if (!strcmp(db->db->schema->name, db_name)) {
return db;
}
}
return NULL;
}
static char * 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 struct ovsdb_column *column;
const struct ovsdb_table *table;
const char *tokens[3];
char *save_ptr = NULL;
const struct db *db;
*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];
db = find_db(all_dbs, tokens[0]);
if (!db) {
return xasprintf("\"%s\": no database named %s", name_, db_name);
}
table = ovsdb_get_table(db->db, table_name);
if (!table) {
return xasprintf("\"%s\": no table named %s", name_, table_name);
}
column = ovsdb_table_schema_get_column(table->schema, column_name);
if (!column) {
return xasprintf("\"%s\": table \"%s\" has no column \"%s\"",
name_, table_name, column_name);
}
*dbp = db;
*columnp = column;
*tablep = table;
return NULL;
}
/* Returns NULL if successful, otherwise a malloc()'d string describing the
* error. */
static char * 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 * 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) {
ds_put_format(errors, "%s\n", 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++) {
if (datum->keys[i].string[0]) {
return datum->keys[i].string;
}
}
}
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 struct ovsdb_datum *
get_datum(struct ovsdb_row *row, const char *column_name,
const enum ovsdb_atomic_type key_type,
const enum ovsdb_atomic_type value_type,
const size_t n_max)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
const struct ovsdb_table_schema *schema = row->table->schema;
const struct ovsdb_column *column;
column = ovsdb_table_schema_get_column(schema, column_name);
if (!column) {
VLOG_DBG_RL(&rl, "Table `%s' has no `%s' column",
schema->name, column_name);
return NULL;
}
if (column->type.key.type != key_type
|| column->type.value.type != value_type
|| column->type.n_max != n_max) {
if (!VLOG_DROP_DBG(&rl)) {
char *type_name = ovsdb_type_to_english(&column->type);
VLOG_DBG("Table `%s' column `%s' has type %s, not expected "
"key type %s, value type %s, max elements %"PRIuSIZE".",
schema->name, column_name, type_name,
ovsdb_atomic_type_to_string(key_type),
ovsdb_atomic_type_to_string(value_type),
n_max);
free(type_name);
}
return NULL;
}
return &row->fields[column->index];
}
/* Read string-string key-values from a map. Returns the value associated with
* 'key', if found, or NULL */
static const char *
read_map_string_column(const struct ovsdb_row *row, const char *column_name,
const char *key)
{
const struct ovsdb_datum *datum;
union ovsdb_atom *atom_key = NULL, *atom_value = NULL;
size_t i;
datum = get_datum(CONST_CAST(struct ovsdb_row *, row), column_name,
OVSDB_TYPE_STRING, OVSDB_TYPE_STRING, UINT_MAX);
if (!datum) {
return NULL;
}
for (i = 0; i < datum->n; i++) {
atom_key = &datum->keys[i];
if (!strcmp(atom_key->string, key)){
atom_value = &datum->values[i];
break;
}
}
return atom_value ? atom_value->string : NULL;
}
static const union ovsdb_atom *
read_column(const struct ovsdb_row *row, const char *column_name,
enum ovsdb_atomic_type type)
{
const struct ovsdb_datum *datum;
datum = get_datum(CONST_CAST(struct ovsdb_row *, row), column_name, type,
OVSDB_TYPE_VOID, 1);
return datum && datum->n ? datum->keys : NULL;
}
static bool
read_integer_column(const struct ovsdb_row *row, const char *column_name,
long long int *integerp)
{
const union ovsdb_atom *atom;
atom = read_column(row, column_name, OVSDB_TYPE_INTEGER);
*integerp = atom ? atom->integer : 0;
return atom != NULL;
}
static bool
read_string_column(const struct ovsdb_row *row, const char *column_name,
const char **stringp)
{
const union ovsdb_atom *atom;
atom = read_column(row, column_name, OVSDB_TYPE_STRING);
*stringp = atom ? atom->string : NULL;
return atom != NULL;
}
static void
write_bool_column(struct ovsdb_row *row, const char *column_name, bool value)
{
const struct ovsdb_column *column;
struct ovsdb_datum *datum;
column = ovsdb_table_schema_get_column(row->table->schema, column_name);
datum = get_datum(row, column_name, OVSDB_TYPE_BOOLEAN,
OVSDB_TYPE_VOID, 1);
if (!datum) {
return;
}
if (datum->n != 1) {
ovsdb_datum_destroy(datum, &column->type);
datum->n = 1;
datum->keys = xmalloc(sizeof *datum->keys);
datum->values = NULL;
}
datum->keys[0].boolean = value;
}
static void
write_string_string_column(struct ovsdb_row *row, const char *column_name,
char **keys, char **values, size_t n)
{
const struct ovsdb_column *column;
struct ovsdb_datum *datum;
size_t i;
column = ovsdb_table_schema_get_column(row->table->schema, column_name);
datum = get_datum(row, column_name, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING,
UINT_MAX);
if (!datum) {
for (i = 0; i < n; i++) {
free(keys[i]);
free(values[i]);
}
return;
}
/* Free existing data. */
ovsdb_datum_destroy(datum, &column->type);
/* Allocate space for new values. */
datum->n = n;
datum->keys = xmalloc(n * sizeof *datum->keys);
datum->values = xmalloc(n * sizeof *datum->values);
for (i = 0; i < n; ++i) {
datum->keys[i].string = keys[i];
datum->values[i].string = values[i];
}
/* Sort and check constraints. */
ovsdb_datum_sort_assert(datum, column->type.key.type);
}
/* Adds a remote and options to 'remotes', based on the Manager table row in
* 'row'. */
static void
add_manager_options(struct shash *remotes, const struct ovsdb_row *row)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
struct ovsdb_jsonrpc_options *options;
long long int max_backoff, probe_interval;
const char *target, *dscp_string;
if (!read_string_column(row, "target", &target) || !target) {
VLOG_INFO_RL(&rl, "Table `%s' has missing or invalid `target' column",
row->table->schema->name);
return;
}
options = add_remote(remotes, target);
if (read_integer_column(row, "max_backoff", &max_backoff)) {
options->max_backoff = max_backoff;
}
if (read_integer_column(row, "inactivity_probe", &probe_interval)) {
options->probe_interval = probe_interval;
}
options->dscp = DSCP_DEFAULT;
dscp_string = read_map_string_column(row, "other_config", "dscp");
if (dscp_string) {
int dscp = atoi(dscp_string);
if (dscp >= 0 && dscp <= 63) {
options->dscp = dscp;
}
}
}
static void
query_db_remotes(const char *name, const struct shash *all_dbs,
struct shash *remotes, struct ds *errors)
{
const struct ovsdb_column *column;
const struct ovsdb_table *table;
const struct ovsdb_row *row;
const struct db *db;
char *retval;
retval = parse_db_column(all_dbs, name, &db, &table, &column);
if (retval) {
ds_put_format(errors, "%s\n", retval);
free(retval);
return;
}
if (column->type.key.type == OVSDB_TYPE_STRING
&& column->type.value.type == OVSDB_TYPE_VOID) {
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++) {
add_remote(remotes, datum->keys[i].string);
}
}
} else if (column->type.key.type == OVSDB_TYPE_UUID
&& column->type.key.u.uuid.refTable
&& column->type.value.type == OVSDB_TYPE_VOID) {
const struct ovsdb_table *ref_table = column->type.key.u.uuid.refTable;
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 struct ovsdb_row *ref_row;
ref_row = ovsdb_table_get_row(ref_table, &datum->keys[i].uuid);
if (ref_row) {
add_manager_options(remotes, ref_row);
}
}
}
}
}
static void
update_remote_row(const struct ovsdb_row *row, struct ovsdb_txn *txn,
const struct ovsdb_jsonrpc_server *jsonrpc)
{
struct ovsdb_jsonrpc_remote_status status;
struct ovsdb_row *rw_row;
const char *target;
char *keys[9], *values[9];
size_t n = 0;
/* Get the "target" (protocol/host/port) spec. */
if (!read_string_column(row, "target", &target)) {
/* Bad remote spec or incorrect schema. */
return;
}
rw_row = ovsdb_txn_row_modify(txn, row);
ovsdb_jsonrpc_server_get_remote_status(jsonrpc, target, &status);
/* Update status information columns. */
write_bool_column(rw_row, "is_connected", status.is_connected);
if (status.state) {
keys[n] = xstrdup("state");
values[n++] = xstrdup(status.state);
}
if (status.sec_since_connect != UINT_MAX) {
keys[n] = xstrdup("sec_since_connect");
values[n++] = xasprintf("%u", status.sec_since_connect);
}
if (status.sec_since_disconnect != UINT_MAX) {
keys[n] = xstrdup("sec_since_disconnect");
values[n++] = xasprintf("%u", status.sec_since_disconnect);
}
if (status.last_error) {
keys[n] = xstrdup("last_error");
values[n++] =
xstrdup(ovs_retval_to_string(status.last_error));
}
if (status.locks_held && status.locks_held[0]) {
keys[n] = xstrdup("locks_held");
values[n++] = xstrdup(status.locks_held);
}
if (status.locks_waiting && status.locks_waiting[0]) {
keys[n] = xstrdup("locks_waiting");
values[n++] = xstrdup(status.locks_waiting);
}
if (status.locks_lost && status.locks_lost[0]) {
keys[n] = xstrdup("locks_lost");
values[n++] = xstrdup(status.locks_lost);
}
if (status.n_connections > 1) {
keys[n] = xstrdup("n_connections");
values[n++] = xasprintf("%d", status.n_connections);
}
if (status.bound_port != htons(0)) {
keys[n] = xstrdup("bound_port");
values[n++] = xasprintf("%"PRIu16, ntohs(status.bound_port));
}
write_string_string_column(rw_row, "status", keys, values, n);
ovsdb_jsonrpc_server_free_remote_status(&status);
}
static void
update_remote_rows(const struct shash *all_dbs,
const char *remote_name,
const struct ovsdb_jsonrpc_server *jsonrpc)
{
const struct ovsdb_table *table, *ref_table;
const struct ovsdb_column *column;
const struct ovsdb_row *row;
const struct db *db;
char *retval;
if (strncmp("db:", remote_name, 3)) {
return;
}
retval = parse_db_column(all_dbs, remote_name, &db, &table, &column);
if (retval) {
free(retval);
return;
}
if (column->type.key.type != OVSDB_TYPE_UUID
|| !column->type.key.u.uuid.refTable
|| column->type.value.type != OVSDB_TYPE_VOID) {
return;
}
ref_table = column->type.key.u.uuid.refTable;
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 struct ovsdb_row *ref_row;
ref_row = ovsdb_table_get_row(ref_table, &datum->keys[i].uuid);
if (ref_row) {
update_remote_row(ref_row, db->txn, jsonrpc);
}
}
}
}
static void
update_remote_status(const struct ovsdb_jsonrpc_server *jsonrpc,
const struct sset *remotes,
struct shash *all_dbs)
{
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
const char *remote;
struct db *db;
struct shash_node *node;
SHASH_FOR_EACH(node, all_dbs) {
db = node->data;
db->txn = ovsdb_txn_create(db->db);
}
/* Iterate over --remote arguments given on command line. */
SSET_FOR_EACH (remote, remotes) {
update_remote_rows(all_dbs, remote, jsonrpc);
}
SHASH_FOR_EACH(node, all_dbs) {
struct ovsdb_error *error;
db = node->data;
error = ovsdb_txn_commit(db->txn, false);
if (error) {
VLOG_ERR_RL(&rl, "Failed to update remote status: %s",
ovsdb_error_to_string(error));
ovsdb_error_destroy(error);
}
}
}
/* Reconfigures ovsdb-server's remotes based on information in the database. */
static char *
reconfigure_remotes(struct ovsdb_jsonrpc_server *jsonrpc,
const struct shash *all_dbs, struct sset *remotes)
{
struct ds errors = DS_EMPTY_INITIALIZER;
struct shash resolved_remotes;
const char *name;
/* Configure remotes. */
shash_init(&resolved_remotes);
SSET_FOR_EACH (name, remotes) {
if (!strncmp(name, "db:", 3)) {
query_db_remotes(name, all_dbs, &resolved_remotes, &errors);
} else {
add_remote(&resolved_remotes, name);
}
}
ovsdb_jsonrpc_server_set_remotes(jsonrpc, &resolved_remotes);
shash_destroy_free_data(&resolved_remotes);
return errors.string;
}
static char *
reconfigure_ssl(const struct shash *all_dbs)
{
struct ds errors = DS_EMPTY_INITIALIZER;
const char *resolved_private_key;
const char *resolved_certificate;
const char *resolved_ca_cert;
resolved_private_key = query_db_string(all_dbs, private_key_file, &errors);
resolved_certificate = query_db_string(all_dbs, certificate_file, &errors);
resolved_ca_cert = query_db_string(all_dbs, ca_cert_file, &errors);
stream_ssl_set_key_and_cert(resolved_private_key, resolved_certificate);
stream_ssl_set_ca_cert_file(resolved_ca_cert, bootstrap_ca_cert);
return errors.string;
}
static void
report_error_if_changed(char *error, char **last_errorp)
{
if (error) {
if (!*last_errorp || strcmp(error, *last_errorp)) {
VLOG_WARN("%s", error);
free(*last_errorp);
*last_errorp = error;
return;
}
free(error);
} else {
free(*last_errorp);
*last_errorp = NULL;
}
}
static void
ovsdb_server_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED,
void *exiting_)
{
bool *exiting = exiting_;
*exiting = true;
unixctl_command_reply(conn, NULL);
}
static void
ovsdb_server_compact(struct unixctl_conn *conn, int argc,
const char *argv[], void *dbs_)
{
struct shash *all_dbs = dbs_;
struct ds reply;
struct db *db;
struct shash_node *node;
int n = 0;
ds_init(&reply);
SHASH_FOR_EACH(node, all_dbs) {
const char *name;
db = node->data;
name = db->db->schema->name;
if (argc < 2 || !strcmp(argv[1], name)) {
struct ovsdb_error *error;
VLOG_INFO("compacting %s database by user request", name);
error = ovsdb_file_compact(db->file);
if (error) {
char *s = ovsdb_error_to_string(error);
ds_put_format(&reply, "%s\n", s);
free(s);
ovsdb_error_destroy(error);
}
n++;
}
}
if (!n) {
unixctl_command_reply_error(conn, "no database by that name");
} else if (reply.length) {
unixctl_command_reply_error(conn, ds_cstr(&reply));
} else {
unixctl_command_reply(conn, NULL);
}
ds_destroy(&reply);
}
/* "ovsdb-server/reconnect": makes ovsdb-server drop all of its JSON-RPC
* connections and reconnect. */
static void
ovsdb_server_reconnect(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *jsonrpc_)
{
struct ovsdb_jsonrpc_server *jsonrpc = jsonrpc_;
ovsdb_jsonrpc_server_reconnect(jsonrpc);
unixctl_command_reply(conn, NULL);
}
/* "ovsdb-server/add-remote REMOTE": adds REMOTE to the set of remotes that
* ovsdb-server services. */
static void
ovsdb_server_add_remote(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[], void *config_)
{
struct server_config *config = config_;
const char *remote = argv[1];
const struct ovsdb_column *column;
const struct ovsdb_table *table;
const struct db *db;
char *retval;
retval = (strncmp("db:", remote, 3)
? NULL
: parse_db_column(config->all_dbs, remote,
&db, &table, &column));
if (!retval) {
if (sset_add(config->remotes, remote)) {
save_config(config);
}
unixctl_command_reply(conn, NULL);
} else {
unixctl_command_reply_error(conn, retval);
free(retval);
}
}
/* "ovsdb-server/remove-remote REMOTE": removes REMOTE frmo the set of remotes
* that ovsdb-server services. */
static void
ovsdb_server_remove_remote(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[], void *config_)
{
struct server_config *config = config_;
struct sset_node *node;
node = sset_find(config->remotes, argv[1]);
if (node) {
sset_delete(config->remotes, node);
save_config(config);
unixctl_command_reply(conn, NULL);
} else {
unixctl_command_reply_error(conn, "no such remote");
}
}
/* "ovsdb-server/list-remotes": outputs a list of configured rmeotes. */
static void
ovsdb_server_list_remotes(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *remotes_)
{
struct sset *remotes = remotes_;
const char **list, **p;
struct ds s;
ds_init(&s);
list = sset_sort(remotes);
for (p = list; *p; p++) {
ds_put_format(&s, "%s\n", *p);
}
free(list);
unixctl_command_reply(conn, ds_cstr(&s));
ds_destroy(&s);
}
/* "ovsdb-server/add-db DB": adds the DB to ovsdb-server. */
static void
ovsdb_server_add_database(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[], void *config_)
{
struct server_config *config = config_;
const char *filename = argv[1];
char *error;
error = open_db(config, filename);
if (!error) {
save_config(config);
unixctl_command_reply(conn, NULL);
} else {
unixctl_command_reply_error(conn, error);
free(error);
}
}
static void
ovsdb_server_remove_database(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[], void *config_)
{
struct server_config *config = config_;
struct shash_node *node;
struct db *db;
bool ok;
node = shash_find(config->all_dbs, argv[1]);
if (!node) {
unixctl_command_reply_error(conn, "Failed to find the database.");
return;
}
db = node->data;
ok = ovsdb_jsonrpc_server_remove_db(config->jsonrpc, db->db);
ovs_assert(ok);
ovsdb_destroy(db->db);
shash_delete(config->all_dbs, node);
free(db->filename);
free(db);
save_config(config);
unixctl_command_reply(conn, NULL);
}
static void
ovsdb_server_list_databases(struct unixctl_conn *conn, int argc OVS_UNUSED,
const char *argv[] OVS_UNUSED, void *all_dbs_)
{
struct shash *all_dbs = all_dbs_;
const struct shash_node **nodes;
struct ds s;
size_t i;
ds_init(&s);
nodes = shash_sort(all_dbs);
for (i = 0; i < shash_count(all_dbs); i++) {
struct db *db = nodes[i]->data;
ds_put_format(&s, "%s\n", db->db->schema->name);
}
free(nodes);
unixctl_command_reply(conn, ds_cstr(&s));
ds_destroy(&s);
}
static void
parse_options(int *argcp, char **argvp[],
struct sset *remotes, char **unixctl_pathp, char **run_command)
{
enum {
OPT_REMOTE = UCHAR_MAX + 1,
OPT_UNIXCTL,
OPT_RUN,
OPT_BOOTSTRAP_CA_CERT,
OPT_ENABLE_DUMMY,
VLOG_OPTION_ENUMS,
DAEMON_OPTION_ENUMS
};
static const struct option long_options[] = {
{"remote", required_argument, NULL, OPT_REMOTE},
{"unixctl", required_argument, NULL, OPT_UNIXCTL},
#ifndef _WIN32
{"run", required_argument, NULL, OPT_RUN},
#endif
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'V'},
DAEMON_LONG_OPTIONS,
VLOG_LONG_OPTIONS,
{"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
{"private-key", required_argument, NULL, 'p'},
{"certificate", required_argument, NULL, 'c'},
{"ca-cert", required_argument, NULL, 'C'},
{"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
{NULL, 0, NULL, 0},
};
char *short_options = long_options_to_short_options(long_options);
int argc = *argcp;
char **argv = *argvp;
sset_init(remotes);
for (;;) {
int c;
c = getopt_long(argc, argv, short_options, long_options, NULL);
if (c == -1) {
break;
}
switch (c) {
case OPT_REMOTE:
sset_add(remotes, optarg);
break;
case OPT_UNIXCTL:
*unixctl_pathp = optarg;
break;
case OPT_RUN:
*run_command = optarg;
break;
case 'h':
usage();
case 'V':
ovs_print_version(0, 0);
exit(EXIT_SUCCESS);
VLOG_OPTION_HANDLERS
DAEMON_OPTION_HANDLERS
case 'p':
private_key_file = optarg;
break;
case 'c':
certificate_file = optarg;
break;
case 'C':
ca_cert_file = optarg;
bootstrap_ca_cert = false;
break;
case OPT_BOOTSTRAP_CA_CERT:
ca_cert_file = optarg;
bootstrap_ca_cert = true;
break;
case OPT_ENABLE_DUMMY:
dummy_enable(optarg && !strcmp(optarg, "override"));
break;
case '?':
exit(EXIT_FAILURE);
default:
abort();
}
}
free(short_options);
*argcp -= optind;
*argvp += optind;
}
static void
usage(void)
{
printf("%s: Open vSwitch database server\n"
"usage: %s [OPTIONS] [DATABASE...]\n"
"where each DATABASE is a database file in ovsdb format.\n"
"The default DATABASE, if none is given, is\n%s/conf.db.\n",
program_name, program_name, ovs_dbdir());
printf("\nJSON-RPC options (may be specified any number of times):\n"
" --remote=REMOTE connect or listen to REMOTE\n");
stream_usage("JSON-RPC", true, true, true);
daemon_usage();
vlog_usage();
printf("\nOther options:\n"
" --run COMMAND run COMMAND as subprocess then exit\n"
" --unixctl=SOCKET override default control socket name\n"
" -h, --help display this help message\n"
" -V, --version display version information\n");
exit(EXIT_SUCCESS);
}
static struct json *
sset_to_json(const struct sset *sset)
{
struct json *array;
const char *s;
array = json_array_create_empty();
SSET_FOR_EACH (s, sset) {
json_array_add(array, json_string_create(s));
}
return array;
}
/* Truncates and replaces the contents of 'config_file' by a representation of
* 'remotes' and 'db_filenames'. */
static void
save_config__(FILE *config_file, const struct sset *remotes,
const struct sset *db_filenames)
{
struct json *obj;
char *s;
if (ftruncate(fileno(config_file), 0) == -1) {
VLOG_FATAL("failed to truncate temporary file (%s)",
ovs_strerror(errno));
}
obj = json_object_create();
json_object_put(obj, "remotes", sset_to_json(remotes));
json_object_put(obj, "db_filenames", sset_to_json(db_filenames));
s = json_to_string(obj, 0);
json_destroy(obj);
if (fseek(config_file, 0, SEEK_SET) != 0
|| fputs(s, config_file) == EOF
|| fflush(config_file) == EOF) {
VLOG_FATAL("failed to write temporary file (%s)", ovs_strerror(errno));
}
free(s);
}
/* Truncates and replaces the contents of 'config_file' by a representation of
* 'config'. */
static void
save_config(struct server_config *config)
{
struct sset db_filenames;
struct shash_node *node;
sset_init(&db_filenames);
SHASH_FOR_EACH (node, config->all_dbs) {
struct db *db = node->data;
sset_add(&db_filenames, db->filename);
}
save_config__(config->config_tmpfile, config->remotes, &db_filenames);
sset_destroy(&db_filenames);
}
static void
sset_from_json(struct sset *sset, const struct json *array)
{
size_t i;
sset_clear(sset);
ovs_assert(array->type == JSON_ARRAY);
for (i = 0; i < array->u.array.n; i++) {
const struct json *elem = array->u.array.elems[i];
sset_add(sset, json_string(elem));
}
}
/* Clears and replaces 'remotes' and 'dbnames' by a configuration read from
* 'config_file', which must have been previously written by save_config(). */
static void
load_config(FILE *config_file, struct sset *remotes, struct sset *db_filenames)
{
struct json *json;
if (fseek(config_file, 0, SEEK_SET) != 0) {
VLOG_FATAL("seek failed in temporary file (%s)", ovs_strerror(errno));
}
json = json_from_stream(config_file);
if (json->type == JSON_STRING) {
VLOG_FATAL("reading json failed (%s)", json_string(json));
}
ovs_assert(json->type == JSON_OBJECT);
sset_from_json(remotes, shash_find_data(json_object(json), "remotes"));
sset_from_json(db_filenames,
shash_find_data(json_object(json), "db_filenames"));
json_destroy(json);
}
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