ovn/utilities/ovn-sbctl.c

   1 /*
   2  * Copyright (c) 2015 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
  19 #include <ctype.h>
  20 #include <errno.h>
  21 #include <float.h>
  22 #include <getopt.h>
  23 #include <inttypes.h>
  24 #include <signal.h>
  25 #include <stdarg.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include "db-ctl-base.h"
  31
  32 #include "command-line.h"
  33 #include "compiler.h"
  34 #include "dynamic-string.h"
  35 #include "fatal-signal.h"
  36 #include "json.h"
  37 #include "ovsdb-data.h"
  38 #include "ovsdb-idl.h"
  39 #include "poll-loop.h"
  40 #include "process.h"
  41 #include "sset.h"
  42 #include "shash.h"
  43 #include "table.h"
  44 #include "timeval.h"
  45 #include "util.h"
  46 #include "openvswitch/vlog.h"
  47 #include "ovn/lib/ovn-sb-idl.h"
  48
  49 VLOG_DEFINE_THIS_MODULE(sbctl);
  50
  51 struct sbctl_context;
  52
  53 /* --db: The database server to contact. */
  54 static const char *db;
  55
  56 /* --oneline: Write each command's output as a single line? */
  57 static bool oneline;
  58
  59 /* --dry-run: Do not commit any changes. */
  60 static bool dry_run;
  61
  62 /* --timeout: Time to wait for a connection to 'db'. */
  63 static int timeout;
  64
  65 /* Format for table output. */
  66 static struct table_style table_style = TABLE_STYLE_DEFAULT;
  67
  68 /* The IDL we're using and the current transaction, if any.
  69  * This is for use by sbctl_exit() only, to allow it to clean up.
  70  * Other code should use its context arguments. */
  71 static struct ovsdb_idl *the_idl;
  72 static struct ovsdb_idl_txn *the_idl_txn;
  73 OVS_NO_RETURN static void sbctl_exit(int status);
  74
  75 static void sbctl_cmd_init(void);
  76 OVS_NO_RETURN static void usage(void);
  77 static void parse_options(int argc, char *argv[], struct shash *local_options);
  78 static void run_prerequisites(struct ctl_command[], size_t n_commands,
  79                               struct ovsdb_idl *);
  80 static void do_sbctl(const char *args, struct ctl_command *, size_t n,
  81                      struct ovsdb_idl *);
  82
  83 int
  84 main(int argc, char *argv[])
  85 {
  86     extern struct vlog_module VLM_reconnect;
  87     struct ovsdb_idl *idl;
  88     struct ctl_command *commands;
  89     struct shash local_options;
  90     unsigned int seqno;
  91     size_t n_commands;
  92     char *args;
  93
  94     set_program_name(argv[0]);
  95     fatal_ignore_sigpipe();
  96     vlog_set_levels(NULL, VLF_CONSOLE, VLL_WARN);
  97     vlog_set_levels(&VLM_reconnect, VLF_ANY_DESTINATION, VLL_WARN);
  98     sbrec_init();
  99
 100     sbctl_cmd_init();
 101
 102     /* Log our arguments.  This is often valuable for debugging systems. */
 103     args = process_escape_args(argv);
 104     VLOG(ctl_might_write_to_db(argv) ? VLL_INFO : VLL_DBG, "Called as %s", args);
 105
 106     /* Parse command line. */
 107     shash_init(&local_options);
 108     parse_options(argc, argv, &local_options);
 109     commands = ctl_parse_commands(argc - optind, argv + optind, &local_options,
 110                                   &n_commands);
 111
 112     if (timeout) {
 113         time_alarm(timeout);
 114     }
 115
 116     /* Initialize IDL. */
 117     idl = the_idl = ovsdb_idl_create(db, &sbrec_idl_class, false, false);
 118     run_prerequisites(commands, n_commands, idl);
 119
 120     /* Execute the commands.
 121      *
 122      * 'seqno' is the database sequence number for which we last tried to
 123      * execute our transaction.  There's no point in trying to commit more than
 124      * once for any given sequence number, because if the transaction fails
 125      * it's because the database changed and we need to obtain an up-to-date
 126      * view of the database before we try the transaction again. */
 127     seqno = ovsdb_idl_get_seqno(idl);
 128     for (;;) {
 129         ovsdb_idl_run(idl);
 130         if (!ovsdb_idl_is_alive(idl)) {
 131             int retval = ovsdb_idl_get_last_error(idl);
 132             ctl_fatal("%s: database connection failed (%s)",
 133                         db, ovs_retval_to_string(retval));
 134         }
 135
 136         if (seqno != ovsdb_idl_get_seqno(idl)) {
 137             seqno = ovsdb_idl_get_seqno(idl);
 138             do_sbctl(args, commands, n_commands, idl);
 139         }
 140
 141         if (seqno == ovsdb_idl_get_seqno(idl)) {
 142             ovsdb_idl_wait(idl);
 143             poll_block();
 144         }
 145     }
 146 }
 147
 148 static void
 149 parse_options(int argc, char *argv[], struct shash *local_options)
 150 {
 151     enum {
 152         OPT_DB = UCHAR_MAX + 1,
 153         OPT_ONELINE,
 154         OPT_NO_SYSLOG,
 155         OPT_DRY_RUN,
 156         OPT_PEER_CA_CERT,
 157         OPT_LOCAL,
 158         OPT_COMMANDS,
 159         OPT_OPTIONS,
 160         VLOG_OPTION_ENUMS,
 161         TABLE_OPTION_ENUMS
 162     };
 163     static const struct option global_long_options[] = {
 164         {"db", required_argument, NULL, OPT_DB},
 165         {"no-syslog", no_argument, NULL, OPT_NO_SYSLOG},
 166         {"dry-run", no_argument, NULL, OPT_DRY_RUN},
 167         {"oneline", no_argument, NULL, OPT_ONELINE},
 168         {"timeout", required_argument, NULL, 't'},
 169         {"help", no_argument, NULL, 'h'},
 170         {"commands", no_argument, NULL, OPT_COMMANDS},
 171         {"options", no_argument, NULL, OPT_OPTIONS},
 172         {"version", no_argument, NULL, 'V'},
 173         VLOG_LONG_OPTIONS,
 174         TABLE_LONG_OPTIONS,
 175         {NULL, 0, NULL, 0},
 176     };
 177     const int n_global_long_options = ARRAY_SIZE(global_long_options) - 1;
 178     char *tmp, *short_options;
 179
 180     struct option *options;
 181     size_t allocated_options;
 182     size_t n_options;
 183     size_t i;
 184
 185     tmp = ovs_cmdl_long_options_to_short_options(global_long_options);
 186     short_options = xasprintf("+%s", tmp);
 187     free(tmp);
 188
 189     /* We want to parse both global and command-specific options here, but
 190      * getopt_long() isn't too convenient for the job.  We copy our global
 191      * options into a dynamic array, then append all of the command-specific
 192      * options. */
 193     options = xmemdup(global_long_options, sizeof global_long_options);
 194     allocated_options = ARRAY_SIZE(global_long_options);
 195     n_options = n_global_long_options;
 196     ctl_add_cmd_options(&options, &n_options, &allocated_options, OPT_LOCAL);
 197     table_style.format = TF_LIST;
 198
 199     for (;;) {
 200         int idx;
 201         int c;
 202
 203         c = getopt_long(argc, argv, short_options, options, &idx);
 204         if (c == -1) {
 205             break;
 206         }
 207
 208         switch (c) {
 209         case OPT_DB:
 210             db = optarg;
 211             break;
 212
 213         case OPT_ONELINE:
 214             oneline = true;
 215             break;
 216
 217         case OPT_NO_SYSLOG:
 218             vlog_set_levels(&VLM_sbctl, VLF_SYSLOG, VLL_WARN);
 219             break;
 220
 221         case OPT_DRY_RUN:
 222             dry_run = true;
 223             break;
 224
 225         case OPT_LOCAL:
 226             if (shash_find(local_options, options[idx].name)) {
 227                 ctl_fatal("'%s' option specified multiple times",
 228                             options[idx].name);
 229             }
 230             shash_add_nocopy(local_options,
 231                              xasprintf("--%s", options[idx].name),
 232                              optarg ? xstrdup(optarg) : NULL);
 233             break;
 234
 235         case 'h':
 236             usage();
 237
 238         case OPT_COMMANDS:
 239             ctl_print_commands();
 240
 241         case OPT_OPTIONS:
 242             ctl_print_options(global_long_options);
 243
 244         case 'V':
 245             ovs_print_version(0, 0);
 246             printf("DB Schema %s\n", sbrec_get_db_version());
 247             exit(EXIT_SUCCESS);
 248
 249         case 't':
 250             timeout = strtoul(optarg, NULL, 10);
 251             if (timeout < 0) {
 252                 ctl_fatal("value %s on -t or --timeout is invalid",
 253                             optarg);
 254             }
 255             break;
 256
 257         VLOG_OPTION_HANDLERS
 258         TABLE_OPTION_HANDLERS(&table_style)
 259
 260         case '?':
 261             exit(EXIT_FAILURE);
 262
 263         default:
 264             abort();
 265         }
 266     }
 267     free(short_options);
 268
 269     if (!db) {
 270         db = ctl_default_db();
 271     }
 272
 273     for (i = n_global_long_options; options[i].name; i++) {
 274         free(CONST_CAST(char *, options[i].name));
 275     }
 276     free(options);
 277 }
 278
 279 static void
 280 usage(void)
 281 {
 282     printf("\
 283 %s: ovs-vswitchd management utility\n\
 284 \n\
 285 for debugging and testing only, never use it in production\n\
 286 \n\
 287 usage: %s [OPTIONS] COMMAND [ARG...]\n\
 288 \n\
 289 SouthBound DB commands:\n\
 290   show                        print overview of database contents\n\
 291 \n\
 292 Chassis commands:\n\
 293   chassis-add CHASSIS ENCAP-TYPE ENCAP-IP  create a new chassis named\n\
 294                                            CHASSIS with one encapsulation\n\
 295                                            entry of ENCAP-TYPE and ENCAP-IP\n\
 296   chassis-del CHASSIS         delete CHASSIS and all of its encaps,\n\
 297                               and gateway_ports\n\
 298 \n\
 299 Port binding commands:\n\
 300   lport-bind LPORT CHASSIS    bind logical port LPORT to CHASSIS\n\
 301   lport-unbind LPORT          reset the port binding of logical port LPORT\n\
 302 \n\
 303 Logical flow commands:\n\
 304   lflow-list [DATAPATH]       List logical flows for all or a single datapath\n\
 305   dump-flows [DATAPATH]       Alias for lflow-list\n\
 306 \n\
 307 %s\
 308 \n\
 309 Options:\n\
 310   --db=DATABASE               connect to DATABASE\n\
 311                               (default: %s)\n\
 312   -t, --timeout=SECS          wait at most SECS seconds for ovs-vswitchd\n\
 313   --dry-run                   do not commit changes to database\n\
 314   --oneline                   print exactly one line of output per command\n",
 315            program_name, program_name, ctl_get_db_cmd_usage(), ctl_default_db());
 316     vlog_usage();
 317     printf("\
 318   --no-syslog             equivalent to --verbose=sbctl:syslog:warn\n");
 319     printf("\n\
 320 Other options:\n\
 321   -h, --help                  display this help message\n\
 322   -V, --version               display version information\n");
 323     exit(EXIT_SUCCESS);
 324 }
 325
 326 \f
 327 /* ovs-sbctl specific context.  Inherits the 'struct ctl_context' as base. */
 328 struct sbctl_context {
 329     struct ctl_context base;
 330
 331     /* A cache of the contents of the database.
 332      *
 333      * A command that needs to use any of this information must first call
 334      * sbctl_context_populate_cache().  A command that changes anything that
 335      * could invalidate the cache must either call
 336      * sbctl_context_invalidate_cache() or manually update the cache to
 337      * maintain its correctness. */
 338     bool cache_valid;
 339     /* Maps from chassis name to struct sbctl_chassis. */
 340     struct shash chassis;
 341     /* Maps from lport name to struct sbctl_port_binding. */
 342     struct shash port_bindings;
 343 };
 344
 345 /* Casts 'base' into 'strcut sbctl_context'. */
 346 static struct sbctl_context *
 347 sbctl_context_cast(struct ctl_context *base)
 348 {
 349     return CONTAINER_OF(base, struct sbctl_context, base);
 350 }
 351
 352 struct sbctl_chassis {
 353     const struct sbrec_chassis *ch_cfg;
 354 };
 355
 356 struct sbctl_port_binding {
 357     const struct sbrec_port_binding *bd_cfg;
 358 };
 359
 360 static void
 361 sbctl_context_invalidate_cache(struct ctl_context *ctx)
 362 {
 363     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 364
 365     if (!sbctl_ctx->cache_valid) {
 366         return;
 367     }
 368     sbctl_ctx->cache_valid = false;
 369     shash_destroy_free_data(&sbctl_ctx->chassis);
 370     shash_destroy_free_data(&sbctl_ctx->port_bindings);
 371 }
 372
 373 static void
 374 sbctl_context_populate_cache(struct ctl_context *ctx)
 375 {
 376     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 377     const struct sbrec_chassis *chassis_rec;
 378     const struct sbrec_port_binding *port_binding_rec;
 379     struct sset chassis, port_bindings;
 380
 381     if (sbctl_ctx->cache_valid) {
 382         /* Cache is already populated. */
 383         return;
 384     }
 385     sbctl_ctx->cache_valid = true;
 386     shash_init(&sbctl_ctx->chassis);
 387     shash_init(&sbctl_ctx->port_bindings);
 388     sset_init(&chassis);
 389     SBREC_CHASSIS_FOR_EACH(chassis_rec, ctx->idl) {
 390         struct sbctl_chassis *ch;
 391
 392         if (!sset_add(&chassis, chassis_rec->name)) {
 393             VLOG_WARN("database contains duplicate chassis name (%s)",
 394                       chassis_rec->name);
 395             continue;
 396         }
 397
 398         ch = xmalloc(sizeof *ch);
 399         ch->ch_cfg = chassis_rec;
 400         shash_add(&sbctl_ctx->chassis, chassis_rec->name, ch);
 401     }
 402     sset_destroy(&chassis);
 403
 404     sset_init(&port_bindings);
 405     SBREC_PORT_BINDING_FOR_EACH(port_binding_rec, ctx->idl) {
 406         struct sbctl_port_binding *bd;
 407
 408         if (!sset_add(&port_bindings, port_binding_rec->logical_port)) {
 409             VLOG_WARN("database contains duplicate port binding for logical "
 410                       "port (%s)",
 411                       port_binding_rec->logical_port);
 412             continue;
 413         }
 414
 415         bd = xmalloc(sizeof *bd);
 416         bd->bd_cfg = port_binding_rec;
 417         shash_add(&sbctl_ctx->port_bindings, port_binding_rec->logical_port,
 418                   bd);
 419     }
 420     sset_destroy(&port_bindings);
 421 }
 422
 423 static void
 424 check_conflicts(struct sbctl_context *sbctl_ctx, const char *name,
 425                 char *msg)
 426 {
 427     if (shash_find(&sbctl_ctx->chassis, name)) {
 428         ctl_fatal("%s because a chassis named %s already exists",
 429                     msg, name);
 430     }
 431     free(msg);
 432 }
 433
 434 static struct sbctl_chassis *
 435 find_chassis(struct sbctl_context *sbctl_ctx, const char *name,
 436              bool must_exist)
 437 {
 438     struct sbctl_chassis *sbctl_ch;
 439
 440     ovs_assert(sbctl_ctx->cache_valid);
 441
 442     sbctl_ch = shash_find_data(&sbctl_ctx->chassis, name);
 443     if (must_exist && !sbctl_ch) {
 444         ctl_fatal("no chassis named %s", name);
 445     }
 446
 447     return sbctl_ch;
 448 }
 449
 450 static struct sbctl_port_binding *
 451 find_port_binding(struct sbctl_context *sbctl_ctx, const char *name,
 452                   bool must_exist)
 453 {
 454     struct sbctl_port_binding *bd;
 455
 456     ovs_assert(sbctl_ctx->cache_valid);
 457
 458     bd = shash_find_data(&sbctl_ctx->port_bindings, name);
 459     if (must_exist && !bd) {
 460         ctl_fatal("no port named %s", name);
 461     }
 462
 463     return bd;
 464 }
 465
 466 static void
 467 pre_get_info(struct ctl_context *ctx)
 468 {
 469     ovsdb_idl_add_column(ctx->idl, &sbrec_chassis_col_name);
 470     ovsdb_idl_add_column(ctx->idl, &sbrec_chassis_col_encaps);
 471
 472     ovsdb_idl_add_column(ctx->idl, &sbrec_encap_col_type);
 473     ovsdb_idl_add_column(ctx->idl, &sbrec_encap_col_ip);
 474
 475     ovsdb_idl_add_column(ctx->idl, &sbrec_port_binding_col_logical_port);
 476     ovsdb_idl_add_column(ctx->idl, &sbrec_port_binding_col_chassis);
 477
 478     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_logical_datapath);
 479     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_pipeline);
 480     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_actions);
 481     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_priority);
 482     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_table_id);
 483     ovsdb_idl_add_column(ctx->idl, &sbrec_logical_flow_col_match);
 484 }
 485
 486 static struct cmd_show_table cmd_show_tables[] = {
 487     {&sbrec_table_chassis,
 488      &sbrec_chassis_col_name,
 489      {&sbrec_chassis_col_encaps,
 490       NULL,
 491       NULL}},
 492
 493     {&sbrec_table_encap,
 494      &sbrec_encap_col_type,
 495      {&sbrec_encap_col_ip,
 496       &sbrec_encap_col_options,
 497       NULL}},
 498
 499     {NULL, NULL, {NULL, NULL, NULL}},
 500 };
 501
 502 static void
 503 cmd_chassis_add(struct ctl_context *ctx)
 504 {
 505     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 506     struct sbrec_chassis *ch;
 507     struct sbrec_encap *encap;
 508     bool may_exist = shash_find(&ctx->options, "--may-exist") != NULL;
 509     const char *ch_name, *encap_type, *encap_ip;
 510
 511     ch_name = ctx->argv[1];
 512     encap_type = ctx->argv[2];
 513     encap_ip = ctx->argv[3];
 514
 515     sbctl_context_populate_cache(ctx);
 516     if (may_exist) {
 517         struct sbctl_chassis *sbctl_ch;
 518
 519         sbctl_ch = find_chassis(sbctl_ctx, ch_name, false);
 520         if (sbctl_ch) {
 521             return;
 522         }
 523     }
 524     check_conflicts(sbctl_ctx, ch_name,
 525                     xasprintf("cannot create a chassis named %s", ch_name));
 526     ch = sbrec_chassis_insert(ctx->txn);
 527     sbrec_chassis_set_name(ch, ch_name);
 528     encap = sbrec_encap_insert(ctx->txn);
 529     sbrec_encap_set_type(encap, encap_type);
 530     sbrec_encap_set_ip(encap, encap_ip);
 531     sbrec_chassis_set_encaps(ch, &encap, 1);
 532     sbctl_context_invalidate_cache(ctx);
 533 }
 534
 535 static void
 536 cmd_chassis_del(struct ctl_context *ctx)
 537 {
 538     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 539     bool must_exist = !shash_find(&ctx->options, "--if-exists");
 540     struct sbctl_chassis *sbctl_ch;
 541
 542     sbctl_context_populate_cache(ctx);
 543     sbctl_ch = find_chassis(sbctl_ctx, ctx->argv[1], must_exist);
 544     if (sbctl_ch) {
 545         if (sbctl_ch->ch_cfg) {
 546             sbrec_chassis_delete(sbctl_ch->ch_cfg);
 547         }
 548         shash_find_and_delete(&sbctl_ctx->chassis, ctx->argv[1]);
 549         free(sbctl_ch);
 550     }
 551 }
 552
 553 static void
 554 cmd_lport_bind(struct ctl_context *ctx)
 555 {
 556     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 557     bool may_exist = shash_find(&ctx->options, "--may-exist") != NULL;
 558     struct sbctl_chassis *sbctl_ch;
 559     struct sbctl_port_binding *sbctl_bd;
 560     char *lport_name, *ch_name;
 561
 562     /* port_binding must exist, chassis must exist! */
 563     lport_name = ctx->argv[1];
 564     ch_name = ctx->argv[2];
 565
 566     sbctl_context_populate_cache(ctx);
 567     sbctl_bd = find_port_binding(sbctl_ctx, lport_name, true);
 568     sbctl_ch = find_chassis(sbctl_ctx, ch_name, true);
 569
 570     if (sbctl_bd->bd_cfg->chassis) {
 571         if (may_exist && sbctl_bd->bd_cfg->chassis == sbctl_ch->ch_cfg) {
 572             return;
 573         } else {
 574             ctl_fatal("lport (%s) has already been binded to chassis (%s)",
 575                       lport_name, sbctl_bd->bd_cfg->chassis->name);
 576         }
 577     }
 578     sbrec_port_binding_set_chassis(sbctl_bd->bd_cfg, sbctl_ch->ch_cfg);
 579     sbctl_context_invalidate_cache(ctx);
 580 }
 581
 582 static void
 583 cmd_lport_unbind(struct ctl_context *ctx)
 584 {
 585     struct sbctl_context *sbctl_ctx = sbctl_context_cast(ctx);
 586     bool must_exist = !shash_find(&ctx->options, "--if-exists");
 587     struct sbctl_port_binding *sbctl_bd;
 588     char *lport_name;
 589
 590     lport_name = ctx->argv[1];
 591     sbctl_context_populate_cache(ctx);
 592     sbctl_bd = find_port_binding(sbctl_ctx, lport_name, must_exist);
 593     if (sbctl_bd) {
 594         sbrec_port_binding_set_chassis(sbctl_bd->bd_cfg, NULL);
 595     }
 596 }
 597
 598 enum {
 599     PL_INGRESS,
 600     PL_EGRESS,
 601 };
 602
 603 /* Help ensure we catch any future pipeline values */
 604 static int
 605 pipeline_encode(const char *pl)
 606 {
 607     if (!strcmp(pl, "ingress")) {
 608         return PL_INGRESS;
 609     } else if (!strcmp(pl, "egress")) {
 610         return PL_EGRESS;
 611     }
 612
 613     OVS_NOT_REACHED();
 614 }
 615
 616 static int
 617 lflow_cmp(const void *lf1_, const void *lf2_)
 618 {
 619     const struct sbrec_logical_flow *lf1, *lf2;
 620
 621     lf1 = *((struct sbrec_logical_flow **) lf1_);
 622     lf2 = *((struct sbrec_logical_flow **) lf2_);
 623
 624     int pl1 = pipeline_encode(lf1->pipeline);
 625     int pl2 = pipeline_encode(lf2->pipeline);
 626
 627 #define CMP(expr) \
 628     do { \
 629         int res; \
 630         res = (expr); \
 631         if (res) { \
 632             return res; \
 633         } \
 634     } while (0)
 635
 636     CMP(uuid_compare_3way(&lf1->logical_datapath->header_.uuid,
 637                           &lf2->logical_datapath->header_.uuid));
 638     CMP(pl1 - pl2);
 639     CMP(lf1->table_id > lf2->table_id ? 1 :
 640             (lf1->table_id < lf2->table_id ? -1 : 0));
 641     CMP(lf1->priority > lf2->priority ? -1 :
 642             (lf1->priority < lf2->priority ? 1 : 0));
 643     CMP(strcmp(lf1->match, lf2->match));
 644
 645 #undef CMP
 646
 647     return 0;
 648 }
 649
 650 static void
 651 cmd_lflow_list(struct ctl_context *ctx)
 652 {
 653     const char *datapath = ctx->argc == 2 ? ctx->argv[1] : NULL;
 654     struct uuid datapath_uuid = { .parts = { 0, }};
 655     const struct sbrec_logical_flow **lflows;
 656     const struct sbrec_logical_flow *lflow;
 657     size_t n_flows = 0, n_capacity = 64;
 658
 659     if (datapath && !uuid_from_string(&datapath_uuid, datapath)) {
 660         VLOG_ERR("Invalid format of datapath UUID");
 661         return;
 662     }
 663
 664     lflows = xmalloc(sizeof *lflows * n_capacity);
 665     SBREC_LOGICAL_FLOW_FOR_EACH (lflow, ctx->idl) {
 666         if (n_flows == n_capacity) {
 667             lflows = x2nrealloc(lflows, &n_capacity, sizeof *lflows);
 668         }
 669         lflows[n_flows] = lflow;
 670         n_flows++;
 671     }
 672
 673     qsort(lflows, n_flows, sizeof *lflows, lflow_cmp);
 674
 675     const char *cur_pipeline = "";
 676     size_t i;
 677     for (i = 0; i < n_flows; i++) {
 678         lflow = lflows[i];
 679         if (datapath && !uuid_equals(&datapath_uuid,
 680                                      &lflow->logical_datapath->header_.uuid)) {
 681             continue;
 682         }
 683         if (strcmp(cur_pipeline, lflow->pipeline)) {
 684             printf("Datapath: " UUID_FMT "  Pipeline: %s\n",
 685                     UUID_ARGS(&lflow->logical_datapath->header_.uuid),
 686                     lflow->pipeline);
 687             cur_pipeline = lflow->pipeline;
 688         }
 689         printf("  table_id=%" PRId64 ", priority=%3" PRId64 ", "
 690                "match=(%s), action=(%s)\n",
 691                lflow->table_id, lflow->priority,
 692                lflow->match, lflow->actions);
 693     }
 694
 695     free(lflows);
 696 }
 697
 698 \f
 699 static const struct ctl_table_class tables[] = {
 700     {&sbrec_table_chassis,
 701      {{&sbrec_table_chassis, &sbrec_chassis_col_name, NULL},
 702       {NULL, NULL, NULL}}},
 703
 704     {&sbrec_table_encap,
 705      {{NULL, NULL, NULL},
 706       {NULL, NULL, NULL}}},
 707
 708     {&sbrec_table_logical_flow,
 709      {{&sbrec_table_logical_flow, NULL,
 710        &sbrec_logical_flow_col_logical_datapath},
 711       {NULL, NULL, NULL}}},
 712
 713     {&sbrec_table_multicast_group,
 714      {{NULL, NULL, NULL},
 715       {NULL, NULL, NULL}}},
 716
 717     {&sbrec_table_datapath_binding,
 718      {{NULL, NULL, NULL},
 719       {NULL, NULL, NULL}}},
 720
 721     {&sbrec_table_port_binding,
 722      {{&sbrec_table_port_binding, &sbrec_port_binding_col_logical_port, NULL},
 723       {NULL, NULL, NULL}}},
 724
 725     {NULL, {{NULL, NULL, NULL}, {NULL, NULL, NULL}}}
 726 };
 727
 728 \f
 729 static void
 730 sbctl_context_init_command(struct sbctl_context *sbctl_ctx,
 731                            struct ctl_command *command)
 732 {
 733     ctl_context_init_command(&sbctl_ctx->base, command);
 734 }
 735
 736 static void
 737 sbctl_context_init(struct sbctl_context *sbctl_ctx,
 738                    struct ctl_command *command, struct ovsdb_idl *idl,
 739                    struct ovsdb_idl_txn *txn,
 740                    struct ovsdb_symbol_table *symtab)
 741 {
 742     ctl_context_init(&sbctl_ctx->base, command, idl, txn, symtab,
 743                      sbctl_context_invalidate_cache);
 744     sbctl_ctx->cache_valid = false;
 745 }
 746
 747 static void
 748 sbctl_context_done_command(struct sbctl_context *sbctl_ctx,
 749                            struct ctl_command *command)
 750 {
 751     ctl_context_done_command(&sbctl_ctx->base, command);
 752 }
 753
 754 static void
 755 sbctl_context_done(struct sbctl_context *sbctl_ctx,
 756                    struct ctl_command *command)
 757 {
 758     ctl_context_done(&sbctl_ctx->base, command);
 759 }
 760
 761 static void
 762 run_prerequisites(struct ctl_command *commands, size_t n_commands,
 763                   struct ovsdb_idl *idl)
 764 {
 765     struct ctl_command *c;
 766
 767     for (c = commands; c < &commands[n_commands]; c++) {
 768         if (c->syntax->prerequisites) {
 769             struct sbctl_context sbctl_ctx;
 770
 771             ds_init(&c->output);
 772             c->table = NULL;
 773
 774             sbctl_context_init(&sbctl_ctx, c, idl, NULL, NULL);
 775             (c->syntax->prerequisites)(&sbctl_ctx.base);
 776             sbctl_context_done(&sbctl_ctx, c);
 777
 778             ovs_assert(!c->output.string);
 779             ovs_assert(!c->table);
 780         }
 781     }
 782 }
 783
 784 static void
 785 do_sbctl(const char *args, struct ctl_command *commands, size_t n_commands,
 786          struct ovsdb_idl *idl)
 787 {
 788     struct ovsdb_idl_txn *txn;
 789     enum ovsdb_idl_txn_status status;
 790     struct ovsdb_symbol_table *symtab;
 791     struct sbctl_context sbctl_ctx;
 792     struct ctl_command *c;
 793     struct shash_node *node;
 794     char *error = NULL;
 795
 796     txn = the_idl_txn = ovsdb_idl_txn_create(idl);
 797     if (dry_run) {
 798         ovsdb_idl_txn_set_dry_run(txn);
 799     }
 800
 801     ovsdb_idl_txn_add_comment(txn, "ovs-sbctl: %s", args);
 802
 803     symtab = ovsdb_symbol_table_create();
 804     for (c = commands; c < &commands[n_commands]; c++) {
 805         ds_init(&c->output);
 806         c->table = NULL;
 807     }
 808     sbctl_context_init(&sbctl_ctx, NULL, idl, txn, symtab);
 809     for (c = commands; c < &commands[n_commands]; c++) {
 810         sbctl_context_init_command(&sbctl_ctx, c);
 811         if (c->syntax->run) {
 812             (c->syntax->run)(&sbctl_ctx.base);
 813         }
 814         sbctl_context_done_command(&sbctl_ctx, c);
 815
 816         if (sbctl_ctx.base.try_again) {
 817             sbctl_context_done(&sbctl_ctx, NULL);
 818             goto try_again;
 819         }
 820     }
 821     sbctl_context_done(&sbctl_ctx, NULL);
 822
 823     SHASH_FOR_EACH (node, &symtab->sh) {
 824         struct ovsdb_symbol *symbol = node->data;
 825         if (!symbol->created) {
 826             ctl_fatal("row id \"%s\" is referenced but never created (e.g. "
 827                         "with \"-- --id=%s create ...\")",
 828                         node->name, node->name);
 829         }
 830         if (!symbol->strong_ref) {
 831             if (!symbol->weak_ref) {
 832                 VLOG_WARN("row id \"%s\" was created but no reference to it "
 833                           "was inserted, so it will not actually appear in "
 834                           "the database", node->name);
 835             } else {
 836                 VLOG_WARN("row id \"%s\" was created but only a weak "
 837                           "reference to it was inserted, so it will not "
 838                           "actually appear in the database", node->name);
 839             }
 840         }
 841     }
 842
 843     status = ovsdb_idl_txn_commit_block(txn);
 844     if (status == TXN_UNCHANGED || status == TXN_SUCCESS) {
 845         for (c = commands; c < &commands[n_commands]; c++) {
 846             if (c->syntax->postprocess) {
 847                 sbctl_context_init(&sbctl_ctx, c, idl, txn, symtab);
 848                 (c->syntax->postprocess)(&sbctl_ctx.base);
 849                 sbctl_context_done(&sbctl_ctx, c);
 850             }
 851         }
 852     }
 853     error = xstrdup(ovsdb_idl_txn_get_error(txn));
 854
 855     switch (status) {
 856     case TXN_UNCOMMITTED:
 857     case TXN_INCOMPLETE:
 858         OVS_NOT_REACHED();
 859
 860     case TXN_ABORTED:
 861         /* Should not happen--we never call ovsdb_idl_txn_abort(). */
 862         ctl_fatal("transaction aborted");
 863
 864     case TXN_UNCHANGED:
 865     case TXN_SUCCESS:
 866         break;
 867
 868     case TXN_TRY_AGAIN:
 869         goto try_again;
 870
 871     case TXN_ERROR:
 872         ctl_fatal("transaction error: %s", error);
 873
 874     case TXN_NOT_LOCKED:
 875         /* Should not happen--we never call ovsdb_idl_set_lock(). */
 876         ctl_fatal("database not locked");
 877
 878     default:
 879         OVS_NOT_REACHED();
 880     }
 881     free(error);
 882
 883     ovsdb_symbol_table_destroy(symtab);
 884
 885     for (c = commands; c < &commands[n_commands]; c++) {
 886         struct ds *ds = &c->output;
 887
 888         if (c->table) {
 889             table_print(c->table, &table_style);
 890         } else if (oneline) {
 891             size_t j;
 892
 893             ds_chomp(ds, '\n');
 894             for (j = 0; j < ds->length; j++) {
 895                 int ch = ds->string[j];
 896                 switch (ch) {
 897                 case '\n':
 898                     fputs("\\n", stdout);
 899                     break;
 900
 901                 case '\\':
 902                     fputs("\\\\", stdout);
 903                     break;
 904
 905                 default:
 906                     putchar(ch);
 907                 }
 908             }
 909             putchar('\n');
 910         } else {
 911             fputs(ds_cstr(ds), stdout);
 912         }
 913         ds_destroy(&c->output);
 914         table_destroy(c->table);
 915         free(c->table);
 916
 917         shash_destroy_free_data(&c->options);
 918     }
 919     free(commands);
 920     ovsdb_idl_txn_destroy(txn);
 921     ovsdb_idl_destroy(idl);
 922
 923     exit(EXIT_SUCCESS);
 924
 925 try_again:
 926     /* Our transaction needs to be rerun, or a prerequisite was not met.  Free
 927      * resources and return so that the caller can try again. */
 928     if (txn) {
 929         ovsdb_idl_txn_abort(txn);
 930         ovsdb_idl_txn_destroy(txn);
 931         the_idl_txn = NULL;
 932     }
 933     ovsdb_symbol_table_destroy(symtab);
 934     for (c = commands; c < &commands[n_commands]; c++) {
 935         ds_destroy(&c->output);
 936         table_destroy(c->table);
 937         free(c->table);
 938     }
 939     free(error);
 940 }
 941
 942 /* Frees the current transaction and the underlying IDL and then calls
 943  * exit(status).
 944  *
 945  * Freeing the transaction and the IDL is not strictly necessary, but it makes
 946  * for a clean memory leak report from valgrind in the normal case.  That makes
 947  * it easier to notice real memory leaks. */
 948 static void
 949 sbctl_exit(int status)
 950 {
 951     if (the_idl_txn) {
 952         ovsdb_idl_txn_abort(the_idl_txn);
 953         ovsdb_idl_txn_destroy(the_idl_txn);
 954     }
 955     ovsdb_idl_destroy(the_idl);
 956     exit(status);
 957 }
 958
 959 static const struct ctl_command_syntax sbctl_commands[] = {
 960     /* Chassis commands. */
 961     {"chassis-add", 3, 3, "CHASSIS ENCAP-TYPE ENCAP-IP", pre_get_info,
 962      cmd_chassis_add, NULL, "--may-exist", RW},
 963     {"chassis-del", 1, 1, "CHASSIS", pre_get_info, cmd_chassis_del, NULL,
 964      "--if-exists", RW},
 965
 966     /* Port binding commands. */
 967     {"lport-bind", 2, 2, "LPORT CHASSIS", pre_get_info, cmd_lport_bind, NULL,
 968      "--may-exist", RW},
 969     {"lport-unbind", 1, 1, "LPORT", pre_get_info, cmd_lport_unbind, NULL,
 970      "--if-exists", RW},
 971
 972     /* Logical flow commands */
 973     {"lflow-list", 0, 1, "[DATAPATH]", pre_get_info, cmd_lflow_list, NULL,
 974      "", RO},
 975     {"dump-flows", 0, 1, "[DATAPATH]", pre_get_info, cmd_lflow_list, NULL,
 976      "", RO}, /* Friendly alias for lflow-list */
 977
 978     /* SSL commands (To Be Added). */
 979
 980     {NULL, 0, 0, NULL, NULL, NULL, NULL, NULL, RO},
 981 };
 982
 983 /* Registers sbctl and common db commands. */
 984 static void
 985 sbctl_cmd_init(void)
 986 {
 987     ctl_init(tables, cmd_show_tables, sbctl_exit);
 988     ctl_register_commands(sbctl_commands);
 989 }