ovsdb/ovsdb-tool.c

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <config.h>
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <getopt.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "column.h"
  26 #include "command-line.h"
  27 #include "compiler.h"
  28 #include "dirs.h"
  29 #include "dynamic-string.h"
  30 #include "file.h"
  31 #include "lockfile.h"
  32 #include "log.h"
  33 #include "json.h"
  34 #include "ovsdb.h"
  35 #include "ovsdb-data.h"
  36 #include "ovsdb-error.h"
  37 #include "socket-util.h"
  38 #include "table.h"
  39 #include "timeval.h"
  40 #include "util.h"
  41 #include "vlog.h"
  42
  43 VLOG_DEFINE_THIS_MODULE(ovsdb_tool);
  44
  45 /* -m, --more: Verbosity level for "show-log" command output. */
  46 static int show_log_verbosity;
  47
  48 static const struct command all_commands[];
  49
  50 static void usage(void) NO_RETURN;
  51 static void parse_options(int argc, char *argv[]);
  52
  53 static const char *default_db(void);
  54 static const char *default_schema(void);
  55
  56 int
  57 main(int argc, char *argv[])
  58 {
  59     set_program_name(argv[0]);
  60     parse_options(argc, argv);
  61     signal(SIGPIPE, SIG_IGN);
  62     run_command(argc - optind, argv + optind, all_commands);
  63     return 0;
  64 }
  65
  66 static void
  67 parse_options(int argc, char *argv[])
  68 {
  69     static struct option long_options[] = {
  70         {"more", no_argument, NULL, 'm'},
  71         {"verbose", optional_argument, NULL, 'v'},
  72         {"help", no_argument, NULL, 'h'},
  73         {"version", no_argument, NULL, 'V'},
  74         {NULL, 0, NULL, 0},
  75     };
  76     char *short_options = long_options_to_short_options(long_options);
  77
  78     for (;;) {
  79         int c;
  80
  81         c = getopt_long(argc, argv, short_options, long_options, NULL);
  82         if (c == -1) {
  83             break;
  84         }
  85
  86         switch (c) {
  87         case 'm':
  88             show_log_verbosity++;
  89             break;
  90
  91         case 'h':
  92             usage();
  93
  94         case 'V':
  95             ovs_print_version(0, 0);
  96             exit(EXIT_SUCCESS);
  97
  98         case 'v':
  99             vlog_set_verbosity(optarg);
 100             break;
 101
 102         case '?':
 103             exit(EXIT_FAILURE);
 104
 105         default:
 106             abort();
 107         }
 108     }
 109     free(short_options);
 110 }
 111
 112 static void
 113 usage(void)
 114 {
 115     printf("%s: Open vSwitch database management utility\n"
 116            "usage: %s [OPTIONS] COMMAND [ARG...]\n"
 117            "  create [DB [SCHEMA]]    create DB with the given SCHEMA\n"
 118            "  compact [DB [DST]]      compact DB in-place (or to DST)\n"
 119            "  convert [DB [SCHEMA [DST]]]   convert DB to SCHEMA (to DST)\n"
 120            "  db-version [DB]         report version of schema used by DB\n"
 121            "  db-cksum [DB]           report checksum of schema used by DB\n"
 122            "  schema-version [SCHEMA] report SCHEMA's schema version\n"
 123            "  schema-cksum [SCHEMA]   report SCHEMA's checksum\n"
 124            "  query [DB] TRNS         execute read-only transaction on DB\n"
 125            "  transact [DB] TRNS      execute read/write transaction on DB\n"
 126            "  [-m]... show-log [DB]   print DB's log entries\n"
 127            "The default DB is %s.\n"
 128            "The default SCHEMA is %s.\n",
 129            program_name, program_name, default_db(), default_schema());
 130     vlog_usage();
 131     printf("\nOther options:\n"
 132            "  -m, --more                  increase show-log verbosity\n"
 133            "  -h, --help                  display this help message\n"
 134            "  -V, --version               display version information\n");
 135     exit(EXIT_SUCCESS);
 136 }
 137
 138 static const char *
 139 default_db(void)
 140 {
 141     static char *db;
 142     if (!db) {
 143         db = xasprintf("%s/conf.db", ovs_dbdir());
 144     }
 145     return db;
 146 }
 147
 148 static const char *
 149 default_schema(void)
 150 {
 151     static char *schema;
 152     if (!schema) {
 153         schema = xasprintf("%s/vswitch.ovsschema", ovs_pkgdatadir());
 154     }
 155     return schema;
 156 }
 157 \f
 158 static struct json *
 159 parse_json(const char *s)
 160 {
 161     struct json *json = json_from_string(s);
 162     if (json->type == JSON_STRING) {
 163         ovs_fatal(0, "\"%s\": %s", s, json->u.string);
 164     }
 165     return json;
 166 }
 167
 168 static void
 169 print_and_free_json(struct json *json)
 170 {
 171     char *string = json_to_string(json, JSSF_SORT);
 172     json_destroy(json);
 173     puts(string);
 174     free(string);
 175 }
 176
 177 static void
 178 check_ovsdb_error(struct ovsdb_error *error)
 179 {
 180     if (error) {
 181         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
 182     }
 183 }
 184 \f
 185 static void
 186 do_create(int argc, char *argv[])
 187 {
 188     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 189     const char *schema_file_name = argc >= 3 ? argv[2] : default_schema();
 190     struct ovsdb_schema *schema;
 191     struct ovsdb_log *log;
 192     struct json *json;
 193
 194     /* Read schema from file and convert to JSON. */
 195     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 196     json = ovsdb_schema_to_json(schema);
 197     ovsdb_schema_destroy(schema);
 198
 199     /* Create database file. */
 200     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_CREATE,
 201                                      -1, &log));
 202     check_ovsdb_error(ovsdb_log_write(log, json));
 203     check_ovsdb_error(ovsdb_log_commit(log));
 204     ovsdb_log_close(log);
 205
 206     json_destroy(json);
 207 }
 208
 209 static void
 210 compact_or_convert(const char *src_name_, const char *dst_name_,
 211                    const struct ovsdb_schema *new_schema,
 212                    const char *comment)
 213 {
 214     char *src_name, *dst_name;
 215     struct lockfile *src_lock;
 216     struct lockfile *dst_lock;
 217     bool in_place = dst_name_ == NULL;
 218     struct ovsdb *db;
 219     int retval;
 220
 221     /* Dereference symlinks for source and destination names.  In the in-place
 222      * case this ensures that, if the source name is a symlink, we replace its
 223      * target instead of replacing the symlink by a regular file.  In the
 224      * non-in-place, this has the same effect for the destination name. */
 225     src_name = follow_symlinks(src_name_);
 226     dst_name = (in_place
 227                 ? xasprintf("%s.tmp", src_name)
 228                 : follow_symlinks(dst_name_));
 229
 230     /* Lock the source, if we will be replacing it. */
 231     if (in_place) {
 232         retval = lockfile_lock(src_name, &src_lock);
 233         if (retval) {
 234             ovs_fatal(retval, "%s: failed to lock lockfile", src_name);
 235         }
 236     }
 237
 238     /* Get (temporary) destination and lock it. */
 239     retval = lockfile_lock(dst_name, &dst_lock);
 240     if (retval) {
 241         ovs_fatal(retval, "%s: failed to lock lockfile", dst_name);
 242     }
 243
 244     /* Save a copy. */
 245     check_ovsdb_error(new_schema
 246                       ? ovsdb_file_open_as_schema(src_name, new_schema, &db)
 247                       : ovsdb_file_open(src_name, true, &db, NULL));
 248     check_ovsdb_error(ovsdb_file_save_copy(dst_name, false, comment, db));
 249     ovsdb_destroy(db);
 250
 251     /* Replace source. */
 252     if (in_place) {
 253         if (rename(dst_name, src_name)) {
 254             ovs_fatal(errno, "failed to rename \"%s\" to \"%s\"",
 255                       dst_name, src_name);
 256         }
 257         fsync_parent_dir(dst_name);
 258         lockfile_unlock(src_lock);
 259     }
 260
 261     lockfile_unlock(dst_lock);
 262
 263     free(src_name);
 264     free(dst_name);
 265 }
 266
 267 static void
 268 do_compact(int argc, char *argv[])
 269 {
 270     const char *db = argc >= 2 ? argv[1] : default_db();
 271     const char *target = argc >= 3 ? argv[2] : NULL;
 272
 273     compact_or_convert(db, target, NULL, "compacted by ovsdb-tool "VERSION);
 274 }
 275
 276 static void
 277 do_convert(int argc, char *argv[])
 278 {
 279     const char *db = argc >= 2 ? argv[1] : default_db();
 280     const char *schema = argc >= 3 ? argv[2] : default_schema();
 281     const char *target = argc >= 4 ? argv[3] : NULL;
 282     struct ovsdb_schema *new_schema;
 283
 284     check_ovsdb_error(ovsdb_schema_from_file(schema, &new_schema));
 285     compact_or_convert(db, target, new_schema,
 286                        "converted by ovsdb-tool "VERSION);
 287     ovsdb_schema_destroy(new_schema);
 288 }
 289
 290 static void
 291 do_needs_conversion(int argc, char *argv[])
 292 {
 293     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 294     const char *schema_file_name = argc >= 3 ? argv[2] : default_schema();
 295     struct ovsdb_schema *schema1, *schema2;
 296
 297     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema1));
 298     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema2));
 299     puts(ovsdb_schema_equal(schema1, schema2) ? "no" : "yes");
 300     ovsdb_schema_destroy(schema1);
 301     ovsdb_schema_destroy(schema2);
 302 }
 303
 304 static void
 305 do_db_version(int argc, char *argv[])
 306 {
 307     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 308     struct ovsdb_schema *schema;
 309
 310     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema));
 311     puts(schema->version);
 312     ovsdb_schema_destroy(schema);
 313 }
 314
 315 static void
 316 do_db_cksum(int argc OVS_UNUSED, char *argv[])
 317 {
 318     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 319     struct ovsdb_schema *schema;
 320
 321     check_ovsdb_error(ovsdb_file_read_schema(db_file_name, &schema));
 322     puts(schema->cksum);
 323     ovsdb_schema_destroy(schema);
 324 }
 325
 326 static void
 327 do_schema_version(int argc, char *argv[])
 328 {
 329     const char *schema_file_name = argc >= 2 ? argv[1] : default_schema();
 330     struct ovsdb_schema *schema;
 331
 332     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 333     puts(schema->version);
 334     ovsdb_schema_destroy(schema);
 335 }
 336
 337 static void
 338 do_schema_cksum(int argc, char *argv[])
 339 {
 340     const char *schema_file_name = argc >= 2 ? argv[1] : default_schema();
 341     struct ovsdb_schema *schema;
 342
 343     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 344     puts(schema->cksum);
 345     ovsdb_schema_destroy(schema);
 346 }
 347
 348 static void
 349 transact(bool read_only, int argc, char *argv[])
 350 {
 351     const char *db_file_name = argc >= 3 ? argv[1] : default_db();
 352     const char *transaction = argv[argc - 1];
 353     struct json *request, *result;
 354     struct ovsdb *db;
 355
 356     check_ovsdb_error(ovsdb_file_open(db_file_name, read_only, &db, NULL));
 357
 358     request = parse_json(transaction);
 359     result = ovsdb_execute(db, NULL, request, 0, NULL);
 360     json_destroy(request);
 361
 362     print_and_free_json(result);
 363     ovsdb_destroy(db);
 364 }
 365
 366 static void
 367 do_query(int argc, char *argv[])
 368 {
 369     transact(true, argc, argv);
 370 }
 371
 372 static void
 373 do_transact(int argc, char *argv[])
 374 {
 375     transact(false, argc, argv);
 376 }
 377
 378 static void
 379 print_db_changes(struct shash *tables, struct shash *names,
 380                  const struct ovsdb_schema *schema)
 381 {
 382     struct shash_node *n1;
 383
 384     SHASH_FOR_EACH (n1, tables) {
 385         const char *table = n1->name;
 386         struct ovsdb_table_schema *table_schema;
 387         struct json *rows = n1->data;
 388         struct shash_node *n2;
 389
 390         if (n1->name[0] == '_' || rows->type != JSON_OBJECT) {
 391             continue;
 392         }
 393
 394         table_schema = shash_find_data(&schema->tables, table);
 395         SHASH_FOR_EACH (n2, json_object(rows)) {
 396             const char *row_uuid = n2->name;
 397             struct json *columns = n2->data;
 398             struct shash_node *n3;
 399             char *old_name, *new_name;
 400             bool free_new_name = false;
 401
 402             old_name = new_name = shash_find_data(names, row_uuid);
 403             if (columns->type == JSON_OBJECT) {
 404                 struct json *new_name_json;
 405
 406                 new_name_json = shash_find_data(json_object(columns), "name");
 407                 if (new_name_json) {
 408                     new_name = json_to_string(new_name_json, JSSF_SORT);
 409                     free_new_name = true;
 410                 }
 411             }
 412
 413             printf("\ttable %s", table);
 414
 415             if (!old_name) {
 416                 if (new_name) {
 417                     printf(" insert row %s (%.8s):\n", new_name, row_uuid);
 418                 } else {
 419                     printf(" insert row %.8s:\n", row_uuid);
 420                 }
 421             } else {
 422                 printf(" row %s (%.8s):\n", old_name, row_uuid);
 423             }
 424
 425             if (columns->type == JSON_OBJECT) {
 426                 if (show_log_verbosity > 1) {
 427                     SHASH_FOR_EACH (n3, json_object(columns)) {
 428                         const char *column = n3->name;
 429                         const struct ovsdb_column *column_schema;
 430                         struct json *value = n3->data;
 431                         char *value_string = NULL;
 432
 433                         column_schema =
 434                             (table_schema
 435                              ? shash_find_data(&table_schema->columns, column)
 436                              : NULL);
 437                         if (column_schema) {
 438                             const struct ovsdb_error *error;
 439                             const struct ovsdb_type *type;
 440                             struct ovsdb_datum datum;
 441
 442                             type = &column_schema->type;
 443                             error = ovsdb_datum_from_json(&datum, type,
 444                                                           value, NULL);
 445                             if (!error) {
 446                                 struct ds s;
 447
 448                                 ds_init(&s);
 449                                 ovsdb_datum_to_string(&datum, type, &s);
 450                                 value_string = ds_steal_cstr(&s);
 451                             }
 452                         }
 453                         if (!value_string) {
 454                             value_string = json_to_string(value, JSSF_SORT);
 455                         }
 456                         printf("\t\t%s=%s\n", column, value_string);
 457                         free(value_string);
 458                     }
 459                 }
 460                 if (!old_name
 461                     || (new_name != old_name && strcmp(old_name, new_name))) {
 462                     if (old_name) {
 463                         shash_delete(names, shash_find(names, row_uuid));
 464                         free(old_name);
 465                     }
 466                     shash_add(names, row_uuid, (new_name
 467                                                 ? xstrdup(new_name)
 468                                                 : xmemdup0(row_uuid, 8)));
 469                 }
 470             } else if (columns->type == JSON_NULL) {
 471                 struct shash_node *node;
 472
 473                 printf("\t\tdelete row\n");
 474                 node = shash_find(names, row_uuid);
 475                 if (node) {
 476                     shash_delete(names, node);
 477                 }
 478                 free(old_name);
 479             }
 480
 481             if (free_new_name) {
 482                 free(new_name);
 483             }
 484         }
 485     }
 486 }
 487
 488 static void
 489 do_show_log(int argc, char *argv[])
 490 {
 491     const char *db_file_name = argc >= 2 ? argv[1] : default_db();
 492     struct shash names;
 493     struct ovsdb_log *log;
 494     struct ovsdb_schema *schema;
 495     unsigned int i;
 496
 497     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_READ_ONLY,
 498                                      -1, &log));
 499     shash_init(&names);
 500     schema = NULL;
 501     for (i = 0; ; i++) {
 502         struct json *json;
 503
 504         check_ovsdb_error(ovsdb_log_read(log, &json));
 505         if (!json) {
 506             break;
 507         }
 508
 509         printf("record %u:", i);
 510         if (i == 0) {
 511             check_ovsdb_error(ovsdb_schema_from_json(json, &schema));
 512             printf(" \"%s\" schema, version=\"%s\", cksum=\"%s\"\n",
 513                    schema->name, schema->version, schema->cksum);
 514         } else if (json->type == JSON_OBJECT) {
 515             struct json *date, *comment;
 516
 517             date = shash_find_data(json_object(json), "_date");
 518             if (date && date->type == JSON_INTEGER) {
 519                 time_t t = json_integer(date);
 520                 char s[128];
 521
 522                 strftime(s, sizeof s, "%Y-%m-%d %H:%M:%S", gmtime(&t));
 523                 printf(" %s", s);
 524             }
 525
 526             comment = shash_find_data(json_object(json), "_comment");
 527             if (comment && comment->type == JSON_STRING) {
 528                 printf(" \"%s\"", json_string(comment));
 529             }
 530
 531             if (i > 0 && show_log_verbosity > 0) {
 532                 putchar('\n');
 533                 print_db_changes(json_object(json), &names, schema);
 534             }
 535         }
 536         json_destroy(json);
 537         putchar('\n');
 538     }
 539
 540     ovsdb_log_close(log);
 541     ovsdb_schema_destroy(schema);
 542     /* XXX free 'names'. */
 543 }
 544
 545 static void
 546 do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 547 {
 548     usage();
 549 }
 550
 551 static const struct command all_commands[] = {
 552     { "create", 0, 2, do_create },
 553     { "compact", 0, 2, do_compact },
 554     { "convert", 0, 3, do_convert },
 555     { "needs-conversion", 0, 2, do_needs_conversion },
 556     { "db-version", 0, 1, do_db_version },
 557     { "db-cksum", 0, 1, do_db_cksum },
 558     { "schema-version", 0, 1, do_schema_version },
 559     { "schema-cksum", 0, 1, do_schema_cksum },
 560     { "query", 1, 2, do_query },
 561     { "transact", 1, 2, do_transact },
 562     { "show-log", 0, 1, do_show_log },
 563     { "help", 0, INT_MAX, do_help },
 564     { NULL, 0, 0, NULL },
 565 };