ovsdb/ovsdb-server.c

   1 /* Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #include <config.h>
  17
  18 #include <errno.h>
  19 #include <getopt.h>
  20 #include <signal.h>
  21 #include <unistd.h>
  22
  23 #include "column.h"
  24 #include "command-line.h"
  25 #include "daemon.h"
  26 #include "dirs.h"
  27 #include "dummy.h"
  28 #include "dynamic-string.h"
  29 #include "file.h"
  30 #include "hash.h"
  31 #include "json.h"
  32 #include "jsonrpc.h"
  33 #include "jsonrpc-server.h"
  34 #include "leak-checker.h"
  35 #include "list.h"
  36 #include "memory.h"
  37 #include "ovsdb.h"
  38 #include "ovsdb-data.h"
  39 #include "ovsdb-types.h"
  40 #include "ovsdb-error.h"
  41 #include "poll-loop.h"
  42 #include "process.h"
  43 #include "row.h"
  44 #include "simap.h"
  45 #include "stream-ssl.h"
  46 #include "stream.h"
  47 #include "stress.h"
  48 #include "sset.h"
  49 #include "table.h"
  50 #include "timeval.h"
  51 #include "transaction.h"
  52 #include "trigger.h"
  53 #include "util.h"
  54 #include "unixctl.h"
  55 #include "vlog.h"
  56
  57 VLOG_DEFINE_THIS_MODULE(ovsdb_server);
  58
  59 struct db {
  60     /* Initialized in main(). */
  61     char *filename;
  62     struct ovsdb_file *file;
  63     struct ovsdb *db;
  64
  65     /* Only used by update_remote_status(). */
  66     struct ovsdb_txn *txn;
  67 };
  68
  69 /* SSL configuration. */
  70 static char *private_key_file;
  71 static char *certificate_file;
  72 static char *ca_cert_file;
  73 static bool bootstrap_ca_cert;
  74
  75 static unixctl_cb_func ovsdb_server_exit;
  76 static unixctl_cb_func ovsdb_server_compact;
  77 static unixctl_cb_func ovsdb_server_reconnect;
  78
  79 static void parse_options(int *argc, char **argvp[],
  80                           struct sset *remotes, char **unixctl_pathp,
  81                           char **run_command);
  82 static void usage(void) NO_RETURN;
  83
  84 static void reconfigure_from_db(struct ovsdb_jsonrpc_server *jsonrpc,
  85                                 const struct db dbs[], size_t n_dbs,
  86                                 struct sset *remotes);
  87
  88 static void update_remote_status(const struct ovsdb_jsonrpc_server *jsonrpc,
  89                                  const struct sset *remotes,
  90                                  struct db dbs[], size_t n_dbs);
  91
  92 int
  93 main(int argc, char *argv[])
  94 {
  95     char *unixctl_path = NULL;
  96     char *run_command = NULL;
  97     struct unixctl_server *unixctl;
  98     struct ovsdb_jsonrpc_server *jsonrpc;
  99     struct sset remotes;
 100     struct process *run_process;
 101     bool exiting;
 102     int retval;
 103     long long int status_timer = LLONG_MIN;
 104
 105     struct db *dbs;
 106     int n_dbs;
 107     int i;
 108
 109     proctitle_init(argc, argv);
 110     set_program_name(argv[0]);
 111     stress_init_command();
 112     signal(SIGPIPE, SIG_IGN);
 113     process_init();
 114
 115     parse_options(&argc, &argv, &remotes, &unixctl_path, &run_command);
 116
 117     daemonize_start();
 118
 119     n_dbs = MAX(1, argc);
 120     dbs = xcalloc(n_dbs + 1, sizeof *dbs);
 121     if (argc > 0) {
 122         for (i = 0; i < argc; i++) {
 123             dbs[i].filename = argv[i];
 124         }
 125     } else {
 126         dbs[0].filename = xasprintf("%s/conf.db", ovs_dbdir());
 127     }
 128
 129     for (i = 0; i < n_dbs; i++) {
 130         struct ovsdb_error *error;
 131
 132         error = ovsdb_file_open(dbs[i].filename, false,
 133                                 &dbs[i].db, &dbs[i].file);
 134         if (error) {
 135             ovs_fatal(0, "%s", ovsdb_error_to_string(error));
 136         }
 137     }
 138
 139     jsonrpc = ovsdb_jsonrpc_server_create();
 140     for (i = 0; i < n_dbs; i++) {
 141         if (!ovsdb_jsonrpc_server_add_db(jsonrpc, dbs[i].db)) {
 142             ovs_fatal(0, "%s: duplicate database name",
 143                       dbs[i].db->schema->name);
 144         }
 145     }
 146     reconfigure_from_db(jsonrpc, dbs, n_dbs, &remotes);
 147
 148     retval = unixctl_server_create(unixctl_path, &unixctl);
 149     if (retval) {
 150         exit(EXIT_FAILURE);
 151     }
 152
 153     if (run_command) {
 154         char *run_argv[4];
 155
 156         run_argv[0] = "/bin/sh";
 157         run_argv[1] = "-c";
 158         run_argv[2] = run_command;
 159         run_argv[3] = NULL;
 160
 161         retval = process_start(run_argv, NULL, 0, NULL, 0, &run_process);
 162         if (retval) {
 163             ovs_fatal(retval, "%s: process failed to start", run_command);
 164         }
 165     } else {
 166         run_process = NULL;
 167     }
 168
 169     daemonize_complete();
 170
 171     if (!run_command) {
 172         /* ovsdb-server is usually a long-running process, in which case it
 173          * makes plenty of sense to log the version, but --run makes
 174          * ovsdb-server more like a command-line tool, so skip it.  */
 175         VLOG_INFO("%s (Open vSwitch) %s", program_name, VERSION);
 176     }
 177
 178     unixctl_command_register("exit", "", 0, 0, ovsdb_server_exit, &exiting);
 179     unixctl_command_register("ovsdb-server/compact", "", 0, 1,
 180                              ovsdb_server_compact, dbs);
 181     unixctl_command_register("ovsdb-server/reconnect", "", 0, 0,
 182                              ovsdb_server_reconnect, jsonrpc);
 183
 184     exiting = false;
 185     while (!exiting) {
 186         int i;
 187
 188         memory_run();
 189         if (memory_should_report()) {
 190             struct simap usage;
 191
 192             simap_init(&usage);
 193             ovsdb_jsonrpc_server_get_memory_usage(jsonrpc, &usage);
 194             for (i = 0; i < n_dbs; i++) {
 195                 ovsdb_get_memory_usage(dbs[i].db, &usage);
 196             }
 197             memory_report(&usage);
 198             simap_destroy(&usage);
 199         }
 200
 201         reconfigure_from_db(jsonrpc, dbs, n_dbs, &remotes);
 202         ovsdb_jsonrpc_server_run(jsonrpc);
 203         unixctl_server_run(unixctl);
 204
 205         for (i = 0; i < n_dbs; i++) {
 206             ovsdb_trigger_run(dbs[i].db, time_msec());
 207         }
 208         if (run_process && process_exited(run_process)) {
 209             exiting = true;
 210         }
 211
 212         /* update Manager status(es) every 5 seconds */
 213         if (time_msec() >= status_timer) {
 214             status_timer = time_msec() + 5000;
 215             update_remote_status(jsonrpc, &remotes, dbs, n_dbs);
 216         }
 217
 218         memory_wait();
 219         ovsdb_jsonrpc_server_wait(jsonrpc);
 220         unixctl_server_wait(unixctl);
 221         for (i = 0; i < n_dbs; i++) {
 222             ovsdb_trigger_wait(dbs[i].db, time_msec());
 223         }
 224         if (run_process) {
 225             process_wait(run_process);
 226         }
 227         if (exiting) {
 228             poll_immediate_wake();
 229         }
 230         poll_timer_wait_until(status_timer);
 231         poll_block();
 232     }
 233     ovsdb_jsonrpc_server_destroy(jsonrpc);
 234     for (i = 0; i < n_dbs; i++) {
 235         ovsdb_destroy(dbs[i].db);
 236     }
 237     sset_destroy(&remotes);
 238     unixctl_server_destroy(unixctl);
 239
 240     if (run_process && process_exited(run_process)) {
 241         int status = process_status(run_process);
 242         if (status) {
 243             ovs_fatal(0, "%s: child exited, %s",
 244                       run_command, process_status_msg(status));
 245         }
 246     }
 247
 248     return 0;
 249 }
 250
 251 static const struct db *
 252 find_db(const struct db dbs[], size_t n_dbs, const char *db_name)
 253 {
 254     size_t i;
 255
 256     for (i = 0; i < n_dbs; i++) {
 257         if (!strcmp(dbs[i].db->schema->name, db_name)) {
 258             return &dbs[i];
 259         }
 260     }
 261
 262     return NULL;
 263 }
 264
 265 static void
 266 parse_db_column(const struct db dbs[], size_t n_dbs,
 267                 const char *name_,
 268                 const struct db **dbp,
 269                 const struct ovsdb_table **tablep,
 270                 const struct ovsdb_column **columnp)
 271 {
 272     const char *table_name, *column_name;
 273     const struct ovsdb_column *column;
 274     const struct ovsdb_table *table;
 275     const char *tokens[3];
 276     char *save_ptr = NULL;
 277     const struct db *db;
 278     char *name;
 279
 280     name = xstrdup(name_);
 281     strtok_r(name, ":", &save_ptr); /* "db:" */
 282     tokens[0] = strtok_r(NULL, ",", &save_ptr);
 283     tokens[1] = strtok_r(NULL, ",", &save_ptr);
 284     tokens[2] = strtok_r(NULL, ",", &save_ptr);
 285     if (!tokens[0] || !tokens[1]) {
 286         ovs_fatal(0, "\"%s\": invalid syntax", name_);
 287     }
 288     if (tokens[2]) {
 289         const char *db_name = tokens[0];
 290         table_name = tokens[1];
 291         column_name = tokens[2];
 292
 293         db = find_db(dbs, n_dbs, tokens[0]);
 294         if (!db) {
 295             ovs_fatal(0, "\"%s\": no database named %s", name_, db_name);
 296         }
 297     } else {
 298         if (n_dbs > 1) {
 299             ovs_fatal(0, "\"%s\": database name must be specified (because "
 300                       "multiple databases are configured)", name_);
 301         }
 302
 303         table_name = tokens[0];
 304         column_name = tokens[1];
 305         db = &dbs[0];
 306     }
 307
 308     table = ovsdb_get_table(db->db, table_name);
 309     if (!table) {
 310         ovs_fatal(0, "\"%s\": no table named %s", name_, table_name);
 311     }
 312
 313     column = ovsdb_table_schema_get_column(table->schema, column_name);
 314     if (!column) {
 315         ovs_fatal(0, "\"%s\": table \"%s\" has no column \"%s\"",
 316                   name_, table_name, column_name);
 317     }
 318     free(name);
 319
 320     *dbp = db;
 321     *columnp = column;
 322     *tablep = table;
 323 }
 324
 325 static void
 326 parse_db_string_column(const struct db dbs[], size_t n_dbs,
 327                        const char *name,
 328                        const struct db **dbp,
 329                        const struct ovsdb_table **tablep,
 330                        const struct ovsdb_column **columnp)
 331 {
 332     const struct ovsdb_column *column;
 333     const struct ovsdb_table *table;
 334     const struct db *db;
 335
 336     parse_db_column(dbs, n_dbs, name, &db, &table, &column);
 337
 338     if (column->type.key.type != OVSDB_TYPE_STRING
 339         || column->type.value.type != OVSDB_TYPE_VOID) {
 340         ovs_fatal(0, "\"%s\": table \"%s\" column \"%s\" is "
 341                   "not string or set of strings",
 342                   name, table->schema->name, column->name);
 343     }
 344
 345     *dbp = db;
 346     *columnp = column;
 347     *tablep = table;
 348 }
 349
 350 static OVS_UNUSED const char *
 351 query_db_string(const struct db dbs[], size_t n_dbs, const char *name)
 352 {
 353     if (!name || strncmp(name, "db:", 3)) {
 354         return name;
 355     } else {
 356         const struct ovsdb_column *column;
 357         const struct ovsdb_table *table;
 358         const struct ovsdb_row *row;
 359         const struct db *db;
 360
 361         parse_db_string_column(dbs, n_dbs, name, &db, &table, &column);
 362
 363         HMAP_FOR_EACH (row, hmap_node, &table->rows) {
 364             const struct ovsdb_datum *datum;
 365             size_t i;
 366
 367             datum = &row->fields[column->index];
 368             for (i = 0; i < datum->n; i++) {
 369                 if (datum->keys[i].string[0]) {
 370                     return datum->keys[i].string;
 371                 }
 372             }
 373         }
 374         return NULL;
 375     }
 376 }
 377
 378 static struct ovsdb_jsonrpc_options *
 379 add_remote(struct shash *remotes, const char *target)
 380 {
 381     struct ovsdb_jsonrpc_options *options;
 382
 383     options = shash_find_data(remotes, target);
 384     if (!options) {
 385         options = ovsdb_jsonrpc_default_options(target);
 386         shash_add(remotes, target, options);
 387     }
 388
 389     return options;
 390 }
 391
 392 static struct ovsdb_datum *
 393 get_datum(struct ovsdb_row *row, const char *column_name,
 394           const enum ovsdb_atomic_type key_type,
 395           const enum ovsdb_atomic_type value_type,
 396           const size_t n_max)
 397 {
 398     static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
 399     const struct ovsdb_table_schema *schema = row->table->schema;
 400     const struct ovsdb_column *column;
 401
 402     column = ovsdb_table_schema_get_column(schema, column_name);
 403     if (!column) {
 404         VLOG_DBG_RL(&rl, "Table `%s' has no `%s' column",
 405                     schema->name, column_name);
 406         return NULL;
 407     }
 408
 409     if (column->type.key.type != key_type
 410         || column->type.value.type != value_type
 411         || column->type.n_max != n_max) {
 412         if (!VLOG_DROP_DBG(&rl)) {
 413             char *type_name = ovsdb_type_to_english(&column->type);
 414             VLOG_DBG("Table `%s' column `%s' has type %s, not expected "
 415                      "key type %s, value type %s, max elements %zd.",
 416                      schema->name, column_name, type_name,
 417                      ovsdb_atomic_type_to_string(key_type),
 418                      ovsdb_atomic_type_to_string(value_type),
 419                      n_max);
 420             free(type_name);
 421         }
 422         return NULL;
 423     }
 424
 425     return &row->fields[column->index];
 426 }
 427
 428 /* Read string-string key-values from a map.  Returns the value associated with
 429  * 'key', if found, or NULL */
 430 static const char *
 431 read_map_string_column(const struct ovsdb_row *row, const char *column_name,
 432                        const char *key)
 433 {
 434     const struct ovsdb_datum *datum;
 435     union ovsdb_atom *atom_key = NULL, *atom_value = NULL;
 436     size_t i;
 437
 438     datum = get_datum(CONST_CAST(struct ovsdb_row *, row), column_name,
 439                       OVSDB_TYPE_STRING, OVSDB_TYPE_STRING, UINT_MAX);
 440
 441     if (!datum) {
 442         return NULL;
 443     }
 444
 445     for (i = 0; i < datum->n; i++) {
 446         atom_key = &datum->keys[i];
 447         if (!strcmp(atom_key->string, key)){
 448             atom_value = &datum->values[i];
 449             break;
 450         }
 451     }
 452
 453     return atom_value ? atom_value->string : NULL;
 454 }
 455
 456 static const union ovsdb_atom *
 457 read_column(const struct ovsdb_row *row, const char *column_name,
 458             enum ovsdb_atomic_type type)
 459 {
 460     const struct ovsdb_datum *datum;
 461
 462     datum = get_datum(CONST_CAST(struct ovsdb_row *, row), column_name, type,
 463                       OVSDB_TYPE_VOID, 1);
 464     return datum && datum->n ? datum->keys : NULL;
 465 }
 466
 467 static bool
 468 read_integer_column(const struct ovsdb_row *row, const char *column_name,
 469                     long long int *integerp)
 470 {
 471     const union ovsdb_atom *atom;
 472
 473     atom = read_column(row, column_name, OVSDB_TYPE_INTEGER);
 474     *integerp = atom ? atom->integer : 0;
 475     return atom != NULL;
 476 }
 477
 478 static bool
 479 read_string_column(const struct ovsdb_row *row, const char *column_name,
 480                    const char **stringp)
 481 {
 482     const union ovsdb_atom *atom;
 483
 484     atom = read_column(row, column_name, OVSDB_TYPE_STRING);
 485     *stringp = atom ? atom->string : NULL;
 486     return atom != NULL;
 487 }
 488
 489 static void
 490 write_bool_column(struct ovsdb_row *row, const char *column_name, bool value)
 491 {
 492     const struct ovsdb_column *column;
 493     struct ovsdb_datum *datum;
 494
 495     column = ovsdb_table_schema_get_column(row->table->schema, column_name);
 496     datum = get_datum(row, column_name, OVSDB_TYPE_BOOLEAN,
 497                       OVSDB_TYPE_VOID, 1);
 498     if (!datum) {
 499         return;
 500     }
 501
 502     if (datum->n != 1) {
 503         ovsdb_datum_destroy(datum, &column->type);
 504
 505         datum->n = 1;
 506         datum->keys = xmalloc(sizeof *datum->keys);
 507         datum->values = NULL;
 508     }
 509
 510     datum->keys[0].boolean = value;
 511 }
 512
 513 static void
 514 write_string_string_column(struct ovsdb_row *row, const char *column_name,
 515                            char **keys, char **values, size_t n)
 516 {
 517     const struct ovsdb_column *column;
 518     struct ovsdb_datum *datum;
 519     size_t i;
 520
 521     column = ovsdb_table_schema_get_column(row->table->schema, column_name);
 522     datum = get_datum(row, column_name, OVSDB_TYPE_STRING, OVSDB_TYPE_STRING,
 523                       UINT_MAX);
 524     if (!datum) {
 525         for (i = 0; i < n; i++) {
 526             free(keys[i]);
 527             free(values[i]);
 528         }
 529         return;
 530     }
 531
 532     /* Free existing data. */
 533     ovsdb_datum_destroy(datum, &column->type);
 534
 535     /* Allocate space for new values. */
 536     datum->n = n;
 537     datum->keys = xmalloc(n * sizeof *datum->keys);
 538     datum->values = xmalloc(n * sizeof *datum->values);
 539
 540     for (i = 0; i < n; ++i) {
 541         datum->keys[i].string = keys[i];
 542         datum->values[i].string = values[i];
 543     }
 544
 545     /* Sort and check constraints. */
 546     ovsdb_datum_sort_assert(datum, column->type.key.type);
 547 }
 548
 549 /* Adds a remote and options to 'remotes', based on the Manager table row in
 550  * 'row'. */
 551 static void
 552 add_manager_options(struct shash *remotes, const struct ovsdb_row *row)
 553 {
 554     static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
 555     struct ovsdb_jsonrpc_options *options;
 556     long long int max_backoff, probe_interval;
 557     const char *target, *dscp_string;
 558
 559     if (!read_string_column(row, "target", &target) || !target) {
 560         VLOG_INFO_RL(&rl, "Table `%s' has missing or invalid `target' column",
 561                      row->table->schema->name);
 562         return;
 563     }
 564
 565     options = add_remote(remotes, target);
 566     if (read_integer_column(row, "max_backoff", &max_backoff)) {
 567         options->max_backoff = max_backoff;
 568     }
 569     if (read_integer_column(row, "inactivity_probe", &probe_interval)) {
 570         options->probe_interval = probe_interval;
 571     }
 572
 573     options->dscp = DSCP_DEFAULT;
 574     dscp_string = read_map_string_column(row, "other_config", "dscp");
 575     if (dscp_string) {
 576         int dscp = atoi(dscp_string);
 577         if (dscp >= 0 && dscp <= 63) {
 578             options->dscp = dscp;
 579         }
 580     }
 581 }
 582
 583 static void
 584 query_db_remotes(const char *name, const struct db dbs[], size_t n_dbs,
 585                  struct shash *remotes)
 586 {
 587     const struct ovsdb_column *column;
 588     const struct ovsdb_table *table;
 589     const struct ovsdb_row *row;
 590     const struct db *db;
 591
 592     parse_db_column(dbs, n_dbs, name, &db, &table, &column);
 593
 594     if (column->type.key.type == OVSDB_TYPE_STRING
 595         && column->type.value.type == OVSDB_TYPE_VOID) {
 596         HMAP_FOR_EACH (row, hmap_node, &table->rows) {
 597             const struct ovsdb_datum *datum;
 598             size_t i;
 599
 600             datum = &row->fields[column->index];
 601             for (i = 0; i < datum->n; i++) {
 602                 add_remote(remotes, datum->keys[i].string);
 603             }
 604         }
 605     } else if (column->type.key.type == OVSDB_TYPE_UUID
 606                && column->type.key.u.uuid.refTable
 607                && column->type.value.type == OVSDB_TYPE_VOID) {
 608         const struct ovsdb_table *ref_table = column->type.key.u.uuid.refTable;
 609         HMAP_FOR_EACH (row, hmap_node, &table->rows) {
 610             const struct ovsdb_datum *datum;
 611             size_t i;
 612
 613             datum = &row->fields[column->index];
 614             for (i = 0; i < datum->n; i++) {
 615                 const struct ovsdb_row *ref_row;
 616
 617                 ref_row = ovsdb_table_get_row(ref_table, &datum->keys[i].uuid);
 618                 if (ref_row) {
 619                     add_manager_options(remotes, ref_row);
 620                 }
 621             }
 622         }
 623     }
 624 }
 625
 626 static void
 627 update_remote_row(const struct ovsdb_row *row, struct ovsdb_txn *txn,
 628                   const struct ovsdb_jsonrpc_server *jsonrpc)
 629 {
 630     struct ovsdb_jsonrpc_remote_status status;
 631     struct ovsdb_row *rw_row;
 632     const char *target;
 633     char *keys[8], *values[8];
 634     size_t n = 0;
 635
 636     /* Get the "target" (protocol/host/port) spec. */
 637     if (!read_string_column(row, "target", &target)) {
 638         /* Bad remote spec or incorrect schema. */
 639         return;
 640     }
 641     rw_row = ovsdb_txn_row_modify(txn, row);
 642     ovsdb_jsonrpc_server_get_remote_status(jsonrpc, target, &status);
 643
 644     /* Update status information columns. */
 645     write_bool_column(rw_row, "is_connected", status.is_connected);
 646
 647     if (status.state) {
 648         keys[n] = xstrdup("state");
 649         values[n++] = xstrdup(status.state);
 650     }
 651     if (status.sec_since_connect != UINT_MAX) {
 652         keys[n] = xstrdup("sec_since_connect");
 653         values[n++] = xasprintf("%u", status.sec_since_connect);
 654     }
 655     if (status.sec_since_disconnect != UINT_MAX) {
 656         keys[n] = xstrdup("sec_since_disconnect");
 657         values[n++] = xasprintf("%u", status.sec_since_disconnect);
 658     }
 659     if (status.last_error) {
 660         keys[n] = xstrdup("last_error");
 661         values[n++] =
 662             xstrdup(ovs_retval_to_string(status.last_error));
 663     }
 664     if (status.locks_held && status.locks_held[0]) {
 665         keys[n] = xstrdup("locks_held");
 666         values[n++] = xstrdup(status.locks_held);
 667     }
 668     if (status.locks_waiting && status.locks_waiting[0]) {
 669         keys[n] = xstrdup("locks_waiting");
 670         values[n++] = xstrdup(status.locks_waiting);
 671     }
 672     if (status.locks_lost && status.locks_lost[0]) {
 673         keys[n] = xstrdup("locks_lost");
 674         values[n++] = xstrdup(status.locks_lost);
 675     }
 676     if (status.n_connections > 1) {
 677         keys[n] = xstrdup("n_connections");
 678         values[n++] = xasprintf("%d", status.n_connections);
 679     }
 680     write_string_string_column(rw_row, "status", keys, values, n);
 681
 682     ovsdb_jsonrpc_server_free_remote_status(&status);
 683 }
 684
 685 static void
 686 update_remote_rows(const struct db dbs[], size_t n_dbs,
 687                    const char *remote_name,
 688                    const struct ovsdb_jsonrpc_server *jsonrpc)
 689 {
 690     const struct ovsdb_table *table, *ref_table;
 691     const struct ovsdb_column *column;
 692     const struct ovsdb_row *row;
 693     const struct db *db;
 694
 695     if (strncmp("db:", remote_name, 3)) {
 696         return;
 697     }
 698
 699     parse_db_column(dbs, n_dbs, remote_name, &db, &table, &column);
 700
 701     if (column->type.key.type != OVSDB_TYPE_UUID
 702         || !column->type.key.u.uuid.refTable
 703         || column->type.value.type != OVSDB_TYPE_VOID) {
 704         return;
 705     }
 706
 707     ref_table = column->type.key.u.uuid.refTable;
 708
 709     HMAP_FOR_EACH (row, hmap_node, &table->rows) {
 710         const struct ovsdb_datum *datum;
 711         size_t i;
 712
 713         datum = &row->fields[column->index];
 714         for (i = 0; i < datum->n; i++) {
 715             const struct ovsdb_row *ref_row;
 716
 717             ref_row = ovsdb_table_get_row(ref_table, &datum->keys[i].uuid);
 718             if (ref_row) {
 719                 update_remote_row(ref_row, db->txn, jsonrpc);
 720             }
 721         }
 722     }
 723 }
 724
 725 static void
 726 update_remote_status(const struct ovsdb_jsonrpc_server *jsonrpc,
 727                      const struct sset *remotes,
 728                      struct db dbs[], size_t n_dbs)
 729 {
 730     static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1);
 731     const char *remote;
 732     size_t i;
 733
 734     for (i = 0; i < n_dbs; i++) {
 735         dbs[i].txn = ovsdb_txn_create(dbs[i].db);
 736     }
 737
 738     /* Iterate over --remote arguments given on command line. */
 739     SSET_FOR_EACH (remote, remotes) {
 740         update_remote_rows(dbs, n_dbs, remote, jsonrpc);
 741     }
 742
 743     for (i = 0; i < n_dbs; i++) {
 744         struct ovsdb_error *error = ovsdb_txn_commit(dbs[i].txn, false);
 745         if (error) {
 746             VLOG_ERR_RL(&rl, "Failed to update remote status: %s",
 747                         ovsdb_error_to_string(error));
 748             ovsdb_error_destroy(error);
 749         }
 750     }
 751 }
 752
 753 /* Reconfigures ovsdb-server based on information in the database. */
 754 static void
 755 reconfigure_from_db(struct ovsdb_jsonrpc_server *jsonrpc,
 756                     const struct db dbs[], size_t n_dbs, struct sset *remotes)
 757 {
 758     struct shash resolved_remotes;
 759     const char *name;
 760
 761     /* Configure remotes. */
 762     shash_init(&resolved_remotes);
 763     SSET_FOR_EACH (name, remotes) {
 764         if (!strncmp(name, "db:", 3)) {
 765             query_db_remotes(name, dbs, n_dbs, &resolved_remotes);
 766         } else {
 767             add_remote(&resolved_remotes, name);
 768         }
 769     }
 770     ovsdb_jsonrpc_server_set_remotes(jsonrpc, &resolved_remotes);
 771     shash_destroy_free_data(&resolved_remotes);
 772
 773     /* Configure SSL. */
 774     stream_ssl_set_key_and_cert(query_db_string(dbs, n_dbs, private_key_file),
 775                                 query_db_string(dbs, n_dbs, certificate_file));
 776     stream_ssl_set_ca_cert_file(query_db_string(dbs, n_dbs, ca_cert_file),
 777                                 bootstrap_ca_cert);
 778 }
 779
 780 static void
 781 ovsdb_server_exit(struct unixctl_conn *conn, int argc OVS_UNUSED,
 782                   const char *argv[] OVS_UNUSED,
 783                   void *exiting_)
 784 {
 785     bool *exiting = exiting_;
 786     *exiting = true;
 787     unixctl_command_reply(conn, NULL);
 788 }
 789
 790 static void
 791 ovsdb_server_compact(struct unixctl_conn *conn, int argc,
 792                      const char *argv[], void *dbs_)
 793 {
 794     struct db *dbs = dbs_;
 795     struct ds reply;
 796     struct db *db;
 797     int n = 0;
 798
 799     ds_init(&reply);
 800     for (db = dbs; db->filename != NULL; db++) {
 801         const char *name = db->db->schema->name;
 802
 803         if (argc < 2 || !strcmp(argv[1], name)) {
 804             struct ovsdb_error *error;
 805
 806             VLOG_INFO("compacting %s database by user request", name);
 807
 808             error = ovsdb_file_compact(db->file);
 809             if (error) {
 810                 char *s = ovsdb_error_to_string(error);
 811                 ds_put_format(&reply, "%s\n", s);
 812                 free(s);
 813             }
 814
 815             n++;
 816         }
 817     }
 818
 819     if (!n) {
 820         unixctl_command_reply_error(conn, "no database by that name");
 821     } else if (reply.length) {
 822         unixctl_command_reply_error(conn, ds_cstr(&reply));
 823     } else {
 824         unixctl_command_reply(conn, NULL);
 825     }
 826     ds_destroy(&reply);
 827 }
 828
 829 /* "ovsdb-server/reconnect": makes ovsdb-server drop all of its JSON-RPC
 830  * connections and reconnect. */
 831 static void
 832 ovsdb_server_reconnect(struct unixctl_conn *conn, int argc OVS_UNUSED,
 833                        const char *argv[] OVS_UNUSED, void *jsonrpc_)
 834 {
 835     struct ovsdb_jsonrpc_server *jsonrpc = jsonrpc_;
 836
 837     ovsdb_jsonrpc_server_reconnect(jsonrpc);
 838     unixctl_command_reply(conn, NULL);
 839 }
 840
 841 static void
 842 parse_options(int *argcp, char **argvp[],
 843               struct sset *remotes, char **unixctl_pathp, char **run_command)
 844 {
 845     enum {
 846         OPT_REMOTE = UCHAR_MAX + 1,
 847         OPT_UNIXCTL,
 848         OPT_RUN,
 849         OPT_BOOTSTRAP_CA_CERT,
 850         OPT_ENABLE_DUMMY,
 851         VLOG_OPTION_ENUMS,
 852         LEAK_CHECKER_OPTION_ENUMS,
 853         DAEMON_OPTION_ENUMS
 854     };
 855     static struct option long_options[] = {
 856         {"remote",      required_argument, NULL, OPT_REMOTE},
 857         {"unixctl",     required_argument, NULL, OPT_UNIXCTL},
 858         {"run",         required_argument, NULL, OPT_RUN},
 859         {"help",        no_argument, NULL, 'h'},
 860         {"version",     no_argument, NULL, 'V'},
 861         DAEMON_LONG_OPTIONS,
 862         VLOG_LONG_OPTIONS,
 863         LEAK_CHECKER_LONG_OPTIONS,
 864         {"bootstrap-ca-cert", required_argument, NULL, OPT_BOOTSTRAP_CA_CERT},
 865         {"private-key", required_argument, NULL, 'p'},
 866         {"certificate", required_argument, NULL, 'c'},
 867         {"ca-cert",     required_argument, NULL, 'C'},
 868         {"enable-dummy", optional_argument, NULL, OPT_ENABLE_DUMMY},
 869         {NULL, 0, NULL, 0},
 870     };
 871     char *short_options = long_options_to_short_options(long_options);
 872     int argc = *argcp;
 873     char **argv = *argvp;
 874
 875     sset_init(remotes);
 876     for (;;) {
 877         int c;
 878
 879         c = getopt_long(argc, argv, short_options, long_options, NULL);
 880         if (c == -1) {
 881             break;
 882         }
 883
 884         switch (c) {
 885         case OPT_REMOTE:
 886             sset_add(remotes, optarg);
 887             break;
 888
 889         case OPT_UNIXCTL:
 890             *unixctl_pathp = optarg;
 891             break;
 892
 893         case OPT_RUN:
 894             *run_command = optarg;
 895             break;
 896
 897         case 'h':
 898             usage();
 899
 900         case 'V':
 901             ovs_print_version(0, 0);
 902             exit(EXIT_SUCCESS);
 903
 904         VLOG_OPTION_HANDLERS
 905         DAEMON_OPTION_HANDLERS
 906         LEAK_CHECKER_OPTION_HANDLERS
 907
 908         case 'p':
 909             private_key_file = optarg;
 910             break;
 911
 912         case 'c':
 913             certificate_file = optarg;
 914             break;
 915
 916         case 'C':
 917             ca_cert_file = optarg;
 918             bootstrap_ca_cert = false;
 919             break;
 920
 921         case OPT_BOOTSTRAP_CA_CERT:
 922             ca_cert_file = optarg;
 923             bootstrap_ca_cert = true;
 924             break;
 925
 926         case OPT_ENABLE_DUMMY:
 927             dummy_enable(optarg && !strcmp(optarg, "override"));
 928             break;
 929
 930         case '?':
 931             exit(EXIT_FAILURE);
 932
 933         default:
 934             abort();
 935         }
 936     }
 937     free(short_options);
 938
 939     *argcp -= optind;
 940     *argvp += optind;
 941 }
 942
 943 static void
 944 usage(void)
 945 {
 946     printf("%s: Open vSwitch database server\n"
 947            "usage: %s [OPTIONS] [DATABASE...]\n"
 948            "where each DATABASE is a database file in ovsdb format.\n"
 949            "The default DATABASE, if none is given, is\n%s/conf.db.\n",
 950            program_name, program_name, ovs_dbdir());
 951     printf("\nJSON-RPC options (may be specified any number of times):\n"
 952            "  --remote=REMOTE         connect or listen to REMOTE\n");
 953     stream_usage("JSON-RPC", true, true, true);
 954     daemon_usage();
 955     vlog_usage();
 956     printf("\nOther options:\n"
 957            "  --run COMMAND           run COMMAND as subprocess then exit\n"
 958            "  --unixctl=SOCKET        override default control socket name\n"
 959            "  -h, --help              display this help message\n"
 960            "  -V, --version           display version information\n");
 961     leak_checker_usage();
 962     exit(EXIT_SUCCESS);
 963 }