ovsdb/ovsdb-tool.c

   1 /*
   2  * Copyright (c) 2009, 2010 Nicira Networks.
   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 "command-line.h"
  26 #include "compiler.h"
  27 #include "file.h"
  28 #include "lockfile.h"
  29 #include "log.h"
  30 #include "json.h"
  31 #include "ovsdb.h"
  32 #include "ovsdb-error.h"
  33 #include "socket-util.h"
  34 #include "table.h"
  35 #include "timeval.h"
  36 #include "util.h"
  37 #include "vlog.h"
  38
  39 VLOG_DEFINE_THIS_MODULE(ovsdb_tool);
  40
  41 /* -m, --more: Verbosity level for "show-log" command output. */
  42 static int show_log_verbosity;
  43
  44 static const struct command all_commands[];
  45
  46 static void usage(void) NO_RETURN;
  47 static void parse_options(int argc, char *argv[]);
  48
  49 int
  50 main(int argc, char *argv[])
  51 {
  52     set_program_name(argv[0]);
  53     parse_options(argc, argv);
  54     signal(SIGPIPE, SIG_IGN);
  55     run_command(argc - optind, argv + optind, all_commands);
  56     return 0;
  57 }
  58
  59 static void
  60 parse_options(int argc, char *argv[])
  61 {
  62     static struct option long_options[] = {
  63         {"more", no_argument, 0, 'm'},
  64         {"verbose", optional_argument, 0, 'v'},
  65         {"help", no_argument, 0, 'h'},
  66         {"version", no_argument, 0, 'V'},
  67         {0, 0, 0, 0},
  68     };
  69     char *short_options = long_options_to_short_options(long_options);
  70
  71     for (;;) {
  72         int c;
  73
  74         c = getopt_long(argc, argv, short_options, long_options, NULL);
  75         if (c == -1) {
  76             break;
  77         }
  78
  79         switch (c) {
  80         case 'm':
  81             show_log_verbosity++;
  82             break;
  83
  84         case 'h':
  85             usage();
  86
  87         case 'V':
  88             OVS_PRINT_VERSION(0, 0);
  89             exit(EXIT_SUCCESS);
  90
  91         case 'v':
  92             vlog_set_verbosity(optarg);
  93             break;
  94
  95         case '?':
  96             exit(EXIT_FAILURE);
  97
  98         default:
  99             abort();
 100         }
 101     }
 102     free(short_options);
 103 }
 104
 105 static void
 106 usage(void)
 107 {
 108     printf("%s: Open vSwitch database management utility\n"
 109            "usage: %s [OPTIONS] COMMAND [ARG...]\n"
 110            "  create DB SCHEMA   create DB with the given SCHEMA\n"
 111            "  compact DB [DST]   compact DB in-place (or to DST)\n"
 112            "  convert DB SCHEMA [DST]   convert DB to SCHEMA (to DST)\n"
 113            "  query DB TRNS      execute read-only transaction on DB\n"
 114            "  transact DB TRNS   execute read/write transaction on DB\n"
 115            "  show-log DB        prints information about DB's log entries\n",
 116            program_name, program_name);
 117     vlog_usage();
 118     printf("\nOther options:\n"
 119            "  -m, --more                  increase show-log verbosity\n"
 120            "  -h, --help                  display this help message\n"
 121            "  -V, --version               display version information\n");
 122     exit(EXIT_SUCCESS);
 123 }
 124 \f
 125 static struct json *
 126 parse_json(const char *s)
 127 {
 128     struct json *json = json_from_string(s);
 129     if (json->type == JSON_STRING) {
 130         ovs_fatal(0, "\"%s\": %s", s, json->u.string);
 131     }
 132     return json;
 133 }
 134
 135 static void
 136 print_and_free_json(struct json *json)
 137 {
 138     char *string = json_to_string(json, JSSF_SORT);
 139     json_destroy(json);
 140     puts(string);
 141     free(string);
 142 }
 143
 144 static void
 145 check_ovsdb_error(struct ovsdb_error *error)
 146 {
 147     if (error) {
 148         ovs_fatal(0, "%s", ovsdb_error_to_string(error));
 149     }
 150 }
 151 \f
 152 static void
 153 do_create(int argc OVS_UNUSED, char *argv[])
 154 {
 155     const char *db_file_name = argv[1];
 156     const char *schema_file_name = argv[2];
 157     struct ovsdb_schema *schema;
 158     struct ovsdb_log *log;
 159     struct json *json;
 160
 161     /* Read schema from file and convert to JSON. */
 162     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &schema));
 163     json = ovsdb_schema_to_json(schema);
 164     ovsdb_schema_destroy(schema);
 165
 166     /* Create database file. */
 167     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_CREATE,
 168                                      -1, &log));
 169     check_ovsdb_error(ovsdb_log_write(log, json));
 170     check_ovsdb_error(ovsdb_log_commit(log));
 171     ovsdb_log_close(log);
 172
 173     json_destroy(json);
 174 }
 175
 176 static void
 177 compact_or_convert(const char *src_name, const char *dst_name,
 178                    const struct ovsdb_schema *new_schema,
 179                    const char *comment)
 180 {
 181     struct lockfile *src_lock;
 182     struct lockfile *dst_lock;
 183     bool in_place = dst_name == NULL;
 184     struct ovsdb *db;
 185     int retval;
 186
 187     /* Lock the source, if we will be replacing it. */
 188     if (in_place) {
 189         retval = lockfile_lock(src_name, 0, &src_lock);
 190         if (retval) {
 191             ovs_fatal(retval, "%s: failed to lock lockfile", src_name);
 192         }
 193     }
 194
 195     /* Get (temporary) destination and lock it. */
 196     if (in_place) {
 197         dst_name = xasprintf("%s.tmp", src_name);
 198     }
 199     retval = lockfile_lock(dst_name, 0, &dst_lock);
 200     if (retval) {
 201         ovs_fatal(retval, "%s: failed to lock lockfile", dst_name);
 202     }
 203
 204     /* Save a copy. */
 205     check_ovsdb_error(new_schema
 206                       ? ovsdb_file_open_as_schema(src_name, new_schema, &db)
 207                       : ovsdb_file_open(src_name, true, &db, NULL));
 208     check_ovsdb_error(ovsdb_file_save_copy(dst_name, false, comment, db));
 209     ovsdb_destroy(db);
 210
 211     /* Replace source. */
 212     if (in_place) {
 213         if (rename(dst_name, src_name)) {
 214             ovs_fatal(errno, "failed to rename \"%s\" to \"%s\"",
 215                       dst_name, src_name);
 216         }
 217         fsync_parent_dir(dst_name);
 218         lockfile_unlock(src_lock);
 219     }
 220
 221     lockfile_unlock(dst_lock);
 222 }
 223
 224 static void
 225 do_compact(int argc OVS_UNUSED, char *argv[])
 226 {
 227     compact_or_convert(argv[1], argv[2], NULL, "compacted by ovsdb-tool");
 228 }
 229
 230 static void
 231 do_convert(int argc OVS_UNUSED, char *argv[])
 232 {
 233     const char *schema_file_name = argv[2];
 234     struct ovsdb_schema *new_schema;
 235
 236     check_ovsdb_error(ovsdb_schema_from_file(schema_file_name, &new_schema));
 237     compact_or_convert(argv[1], argv[3], new_schema,
 238                        "converted by ovsdb-tool");
 239     ovsdb_schema_destroy(new_schema);
 240 }
 241
 242 static void
 243 transact(bool read_only, const char *db_file_name, const char *transaction)
 244 {
 245     struct json *request, *result;
 246     struct ovsdb *db;
 247
 248     check_ovsdb_error(ovsdb_file_open(db_file_name, read_only, &db, NULL));
 249
 250     request = parse_json(transaction);
 251     result = ovsdb_execute(db, request, 0, NULL);
 252     json_destroy(request);
 253
 254     print_and_free_json(result);
 255     ovsdb_destroy(db);
 256 }
 257
 258 static void
 259 do_query(int argc OVS_UNUSED, char *argv[])
 260 {
 261     transact(true, argv[1], argv[2]);
 262 }
 263
 264 static void
 265 do_transact(int argc OVS_UNUSED, char *argv[])
 266 {
 267     transact(false, argv[1], argv[2]);
 268 }
 269
 270 static void
 271 print_db_changes(struct shash *tables, struct shash *names)
 272 {
 273     struct shash_node *n1;
 274
 275     SHASH_FOR_EACH (n1, tables) {
 276         const char *table = n1->name;
 277         struct json *rows = n1->data;
 278         struct shash_node *n2;
 279
 280         if (n1->name[0] == '_' || rows->type != JSON_OBJECT) {
 281             continue;
 282         }
 283
 284         SHASH_FOR_EACH (n2, json_object(rows)) {
 285             const char *row_uuid = n2->name;
 286             struct json *columns = n2->data;
 287             struct shash_node *n3;
 288             char *old_name, *new_name;
 289             bool free_new_name = false;
 290
 291             old_name = new_name = shash_find_data(names, row_uuid);
 292             if (columns->type == JSON_OBJECT) {
 293                 struct json *new_name_json;
 294
 295                 new_name_json = shash_find_data(json_object(columns), "name");
 296                 if (new_name_json) {
 297                     new_name = json_to_string(new_name_json, JSSF_SORT);
 298                     free_new_name = true;
 299                 }
 300             }
 301
 302             printf("\ttable %s", table);
 303
 304             if (!old_name) {
 305                 if (new_name) {
 306                     printf(" insert row %s:\n", new_name);
 307                 } else {
 308                     printf(" insert row %.8s:\n", row_uuid);
 309                 }
 310             } else {
 311                 printf(" row %s:\n", old_name);
 312             }
 313
 314             if (columns->type == JSON_OBJECT) {
 315                 if (show_log_verbosity > 1) {
 316                     SHASH_FOR_EACH (n3, json_object(columns)) {
 317                         const char *column = n3->name;
 318                         struct json *value = n3->data;
 319                         char *value_string;
 320
 321                         value_string = json_to_string(value, JSSF_SORT);
 322                         printf("\t\t%s=%s\n", column, value_string);
 323                         free(value_string);
 324                     }
 325                 }
 326                 if (!old_name
 327                     || (new_name != old_name && strcmp(old_name, new_name))) {
 328                     if (old_name) {
 329                         shash_delete(names, shash_find(names, row_uuid));
 330                         free(old_name);
 331                     }
 332                     shash_add(names, row_uuid, (new_name
 333                                                 ? xstrdup(new_name)
 334                                                 : xmemdup0(row_uuid, 8)));
 335                 }
 336             } else if (columns->type == JSON_NULL) {
 337                 struct shash_node *node;
 338
 339                 printf("\t\tdelete row\n");
 340                 node = shash_find(names, row_uuid);
 341                 if (node) {
 342                     shash_delete(names, node);
 343                 }
 344                 free(old_name);
 345             }
 346
 347             if (free_new_name) {
 348                 free(new_name);
 349             }
 350         }
 351     }
 352 }
 353
 354 static void
 355 do_show_log(int argc OVS_UNUSED, char *argv[])
 356 {
 357     const char *db_file_name = argv[1];
 358     struct shash names;
 359     struct ovsdb_log *log;
 360     unsigned int i;
 361
 362     check_ovsdb_error(ovsdb_log_open(db_file_name, OVSDB_LOG_READ_ONLY,
 363                                      -1, &log));
 364     shash_init(&names);
 365     for (i = 0; ; i++) {
 366         struct json *json;
 367
 368         check_ovsdb_error(ovsdb_log_read(log, &json));
 369         if (!json) {
 370             break;
 371         }
 372
 373         printf("record %u:", i);
 374         if (json->type == JSON_OBJECT) {
 375             struct json *date, *comment;
 376
 377             date = shash_find_data(json_object(json), "_date");
 378             if (date && date->type == JSON_INTEGER) {
 379                 time_t t = json_integer(date);
 380                 char s[128];
 381
 382                 strftime(s, sizeof s, "%Y-%m-%d %H:%M:%S", localtime(&t));
 383                 printf(" %s", s);
 384             }
 385
 386             comment = shash_find_data(json_object(json), "_comment");
 387             if (comment && comment->type == JSON_STRING) {
 388                 printf(" \"%s\"", json_string(comment));
 389             }
 390
 391             if (i > 0 && show_log_verbosity > 0) {
 392                 putchar('\n');
 393                 print_db_changes(json_object(json), &names);
 394             }
 395         }
 396         json_destroy(json);
 397         putchar('\n');
 398     }
 399
 400     /* XXX free 'names'. */
 401 }
 402
 403 static void
 404 do_help(int argc OVS_UNUSED, char *argv[] OVS_UNUSED)
 405 {
 406     usage();
 407 }
 408
 409 static const struct command all_commands[] = {
 410     { "create", 2, 2, do_create },
 411     { "compact", 1, 2, do_compact },
 412     { "convert", 2, 3, do_convert },
 413     { "query", 2, 2, do_query },
 414     { "transact", 2, 2, do_transact },
 415     { "show-log", 1, 1, do_show_log },
 416     { "help", 0, INT_MAX, do_help },
 417     { NULL, 0, 0, NULL },
 418 };