usr.sbin/ctld/parse.y

   1 %{
   2 /*-
   3  * Copyright (c) 2012 The FreeBSD Foundation
   4  * All rights reserved.
   5  *
   6  * This software was developed by Edward Tomasz Napierala under sponsorship
   7  * from the FreeBSD Foundation.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  * $FreeBSD$
  31  */
  32
  33 #include <sys/queue.h>
  34 #include <sys/types.h>
  35 #include <sys/stat.h>
  36 #include <assert.h>
  37 #include <stdio.h>
  38 #include <stdint.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #include "ctld.h"
  43
  44 extern FILE *yyin;
  45 extern char *yytext;
  46 extern int lineno;
  47
  48 static struct conf *conf = NULL;
  49 static struct auth_group *auth_group = NULL;
  50 static struct portal_group *portal_group = NULL;
  51 static struct target *target = NULL;
  52 static struct lun *lun = NULL;
  53
  54 extern void     yyerror(const char *);
  55 extern int      yylex(void);
  56 extern void     yyrestart(FILE *);
  57
  58 %}
  59
  60 %token ALIAS AUTH_GROUP AUTH_TYPE BACKEND BLOCKSIZE CHAP CHAP_MUTUAL
  61 %token CLOSING_BRACKET DEBUG DEVICE_ID DISCOVERY_AUTH_GROUP DISCOVERY_FILTER
  62 %token INITIATOR_NAME INITIATOR_PORTAL ISNS_SERVER ISNS_PERIOD ISNS_TIMEOUT
  63 %token LISTEN LISTEN_ISER LUN MAXPROC OPENING_BRACKET OPTION
  64 %token PATH PIDFILE PORTAL_GROUP REDIRECT SEMICOLON SERIAL SIZE STR
  65 %token TARGET TIMEOUT
  66
  67 %union
  68 {
  69         char *str;
  70 }
  71
  72 %token <str> STR
  73
  74 %%
  75
  76 statements:
  77         |
  78         statements statement
  79         |
  80         statements statement SEMICOLON
  81         ;
  82
  83 statement:
  84         debug
  85         |
  86         timeout
  87         |
  88         maxproc
  89         |
  90         pidfile
  91         |
  92         isns_server
  93         |
  94         isns_period
  95         |
  96         isns_timeout
  97         |
  98         auth_group
  99         |
 100         portal_group
 101         |
 102         lun
 103         |
 104         target
 105         ;
 106
 107 debug:          DEBUG STR
 108         {
 109                 uint64_t tmp;
 110
 111                 if (expand_number($2, &tmp) != 0) {
 112                         yyerror("invalid numeric value");
 113                         free($2);
 114                         return (1);
 115                 }
 116
 117                 conf->conf_debug = tmp;
 118         }
 119         ;
 120
 121 timeout:        TIMEOUT STR
 122         {
 123                 uint64_t tmp;
 124
 125                 if (expand_number($2, &tmp) != 0) {
 126                         yyerror("invalid numeric value");
 127                         free($2);
 128                         return (1);
 129                 }
 130
 131                 conf->conf_timeout = tmp;
 132         }
 133         ;
 134
 135 maxproc:        MAXPROC STR
 136         {
 137                 uint64_t tmp;
 138
 139                 if (expand_number($2, &tmp) != 0) {
 140                         yyerror("invalid numeric value");
 141                         free($2);
 142                         return (1);
 143                 }
 144
 145                 conf->conf_maxproc = tmp;
 146         }
 147         ;
 148
 149 pidfile:        PIDFILE STR
 150         {
 151                 if (conf->conf_pidfile_path != NULL) {
 152                         log_warnx("pidfile specified more than once");
 153                         free($2);
 154                         return (1);
 155                 }
 156                 conf->conf_pidfile_path = $2;
 157         }
 158         ;
 159
 160 isns_server:    ISNS_SERVER STR
 161         {
 162                 int error;
 163
 164                 error = isns_new(conf, $2);
 165                 free($2);
 166                 if (error != 0)
 167                         return (1);
 168         }
 169         ;
 170
 171 isns_period:    ISNS_PERIOD STR
 172         {
 173                 uint64_t tmp;
 174
 175                 if (expand_number($2, &tmp) != 0) {
 176                         yyerror("invalid numeric value");
 177                         free($2);
 178                         return (1);
 179                 }
 180
 181                 conf->conf_isns_period = tmp;
 182         }
 183         ;
 184
 185 isns_timeout:   ISNS_TIMEOUT STR
 186         {
 187                 uint64_t tmp;
 188
 189                 if (expand_number($2, &tmp) != 0) {
 190                         yyerror("invalid numeric value");
 191                         free($2);
 192                         return (1);
 193                 }
 194
 195                 conf->conf_isns_timeout = tmp;
 196         }
 197         ;
 198
 199 auth_group:     AUTH_GROUP auth_group_name
 200     OPENING_BRACKET auth_group_entries CLOSING_BRACKET
 201         {
 202                 auth_group = NULL;
 203         }
 204         ;
 205
 206 auth_group_name:        STR
 207         {
 208                 /*
 209                  * Make it possible to redefine default
 210                  * auth-group. but only once.
 211                  */
 212                 if (strcmp($1, "default") == 0 &&
 213                     conf->conf_default_ag_defined == false) {
 214                         auth_group = auth_group_find(conf, $1);
 215                         conf->conf_default_ag_defined = true;
 216                 } else {
 217                         auth_group = auth_group_new(conf, $1);
 218                 }
 219                 free($1);
 220                 if (auth_group == NULL)
 221                         return (1);
 222         }
 223         ;
 224
 225 auth_group_entries:
 226         |
 227         auth_group_entries auth_group_entry
 228         |
 229         auth_group_entries auth_group_entry SEMICOLON
 230         ;
 231
 232 auth_group_entry:
 233         auth_group_auth_type
 234         |
 235         auth_group_chap
 236         |
 237         auth_group_chap_mutual
 238         |
 239         auth_group_initiator_name
 240         |
 241         auth_group_initiator_portal
 242         ;
 243
 244 auth_group_auth_type:   AUTH_TYPE STR
 245         {
 246                 int error;
 247
 248                 error = auth_group_set_type(auth_group, $2);
 249                 free($2);
 250                 if (error != 0)
 251                         return (1);
 252         }
 253         ;
 254
 255 auth_group_chap:        CHAP STR STR
 256         {
 257                 const struct auth *ca;
 258
 259                 ca = auth_new_chap(auth_group, $2, $3);
 260                 free($2);
 261                 free($3);
 262                 if (ca == NULL)
 263                         return (1);
 264         }
 265         ;
 266
 267 auth_group_chap_mutual: CHAP_MUTUAL STR STR STR STR
 268         {
 269                 const struct auth *ca;
 270
 271                 ca = auth_new_chap_mutual(auth_group, $2, $3, $4, $5);
 272                 free($2);
 273                 free($3);
 274                 free($4);
 275                 free($5);
 276                 if (ca == NULL)
 277                         return (1);
 278         }
 279         ;
 280
 281 auth_group_initiator_name:      INITIATOR_NAME STR
 282         {
 283                 const struct auth_name *an;
 284
 285                 an = auth_name_new(auth_group, $2);
 286                 free($2);
 287                 if (an == NULL)
 288                         return (1);
 289         }
 290         ;
 291
 292 auth_group_initiator_portal:    INITIATOR_PORTAL STR
 293         {
 294                 const struct auth_portal *ap;
 295
 296                 ap = auth_portal_new(auth_group, $2);
 297                 free($2);
 298                 if (ap == NULL)
 299                         return (1);
 300         }
 301         ;
 302
 303 portal_group:   PORTAL_GROUP portal_group_name
 304     OPENING_BRACKET portal_group_entries CLOSING_BRACKET
 305         {
 306                 portal_group = NULL;
 307         }
 308         ;
 309
 310 portal_group_name:      STR
 311         {
 312                 /*
 313                  * Make it possible to redefine default
 314                  * portal-group. but only once.
 315                  */
 316                 if (strcmp($1, "default") == 0 &&
 317                     conf->conf_default_pg_defined == false) {
 318                         portal_group = portal_group_find(conf, $1);
 319                         conf->conf_default_pg_defined = true;
 320                 } else {
 321                         portal_group = portal_group_new(conf, $1);
 322                 }
 323                 free($1);
 324                 if (portal_group == NULL)
 325                         return (1);
 326         }
 327         ;
 328
 329 portal_group_entries:
 330         |
 331         portal_group_entries portal_group_entry
 332         |
 333         portal_group_entries portal_group_entry SEMICOLON
 334         ;
 335
 336 portal_group_entry:
 337         portal_group_discovery_auth_group
 338         |
 339         portal_group_discovery_filter
 340         |
 341         portal_group_listen
 342         |
 343         portal_group_listen_iser
 344         |
 345         portal_group_redirect
 346         ;
 347
 348 portal_group_discovery_auth_group:      DISCOVERY_AUTH_GROUP STR
 349         {
 350                 if (portal_group->pg_discovery_auth_group != NULL) {
 351                         log_warnx("discovery-auth-group for portal-group "
 352                             "\"%s\" specified more than once",
 353                             portal_group->pg_name);
 354                         return (1);
 355                 }
 356                 portal_group->pg_discovery_auth_group =
 357                     auth_group_find(conf, $2);
 358                 if (portal_group->pg_discovery_auth_group == NULL) {
 359                         log_warnx("unknown discovery-auth-group \"%s\" "
 360                             "for portal-group \"%s\"",
 361                             $2, portal_group->pg_name);
 362                         return (1);
 363                 }
 364                 free($2);
 365         }
 366         ;
 367
 368 portal_group_discovery_filter:  DISCOVERY_FILTER STR
 369         {
 370                 int error;
 371
 372                 error = portal_group_set_filter(portal_group, $2);
 373                 free($2);
 374                 if (error != 0)
 375                         return (1);
 376         }
 377         ;
 378
 379 portal_group_listen:    LISTEN STR
 380         {
 381                 int error;
 382
 383                 error = portal_group_add_listen(portal_group, $2, false);
 384                 free($2);
 385                 if (error != 0)
 386                         return (1);
 387         }
 388         ;
 389
 390 portal_group_listen_iser:       LISTEN_ISER STR
 391         {
 392                 int error;
 393
 394                 error = portal_group_add_listen(portal_group, $2, true);
 395                 free($2);
 396                 if (error != 0)
 397                         return (1);
 398         }
 399         ;
 400
 401 portal_group_redirect:  REDIRECT STR
 402         {
 403                 int error;
 404
 405                 error = portal_group_set_redirection(portal_group, $2);
 406                 free($2);
 407                 if (error != 0)
 408                         return (1);
 409         }
 410         ;
 411
 412 lun:    LUN lun_name
 413     OPENING_BRACKET lun_entries CLOSING_BRACKET
 414         {
 415                 lun = NULL;
 416         }
 417         ;
 418
 419 lun_name:       STR
 420         {
 421                 lun = lun_new(conf, $1);
 422                 free($1);
 423                 if (lun == NULL)
 424                         return (1);
 425         }
 426         ;
 427
 428 target: TARGET target_name
 429     OPENING_BRACKET target_entries CLOSING_BRACKET
 430         {
 431                 target = NULL;
 432         }
 433         ;
 434
 435 target_name:    STR
 436         {
 437                 target = target_new(conf, $1);
 438                 free($1);
 439                 if (target == NULL)
 440                         return (1);
 441         }
 442         ;
 443
 444 target_entries:
 445         |
 446         target_entries target_entry
 447         |
 448         target_entries target_entry SEMICOLON
 449         ;
 450
 451 target_entry:
 452         target_alias
 453         |
 454         target_auth_group
 455         |
 456         target_auth_type
 457         |
 458         target_chap
 459         |
 460         target_chap_mutual
 461         |
 462         target_initiator_name
 463         |
 464         target_initiator_portal
 465         |
 466         target_portal_group
 467         |
 468         target_redirect
 469         |
 470         target_lun
 471         |
 472         target_lun_ref
 473         ;
 474
 475 target_alias:   ALIAS STR
 476         {
 477                 if (target->t_alias != NULL) {
 478                         log_warnx("alias for target \"%s\" "
 479                             "specified more than once", target->t_name);
 480                         return (1);
 481                 }
 482                 target->t_alias = $2;
 483         }
 484         ;
 485
 486 target_auth_group:      AUTH_GROUP STR
 487         {
 488                 if (target->t_auth_group != NULL) {
 489                         if (target->t_auth_group->ag_name != NULL)
 490                                 log_warnx("auth-group for target \"%s\" "
 491                                     "specified more than once", target->t_name);
 492                         else
 493                                 log_warnx("cannot use both auth-group and explicit "
 494                                     "authorisations for target \"%s\"",
 495                                     target->t_name);
 496                         return (1);
 497                 }
 498                 target->t_auth_group = auth_group_find(conf, $2);
 499                 if (target->t_auth_group == NULL) {
 500                         log_warnx("unknown auth-group \"%s\" for target "
 501                             "\"%s\"", $2, target->t_name);
 502                         return (1);
 503                 }
 504                 free($2);
 505         }
 506         ;
 507
 508 target_auth_type:       AUTH_TYPE STR
 509         {
 510                 int error;
 511
 512                 if (target->t_auth_group != NULL) {
 513                         if (target->t_auth_group->ag_name != NULL) {
 514                                 log_warnx("cannot use both auth-group and "
 515                                     "auth-type for target \"%s\"",
 516                                     target->t_name);
 517                                 return (1);
 518                         }
 519                 } else {
 520                         target->t_auth_group = auth_group_new(conf, NULL);
 521                         if (target->t_auth_group == NULL) {
 522                                 free($2);
 523                                 return (1);
 524                         }
 525                         target->t_auth_group->ag_target = target;
 526                 }
 527                 error = auth_group_set_type(target->t_auth_group, $2);
 528                 free($2);
 529                 if (error != 0)
 530                         return (1);
 531         }
 532         ;
 533
 534 target_chap:    CHAP STR STR
 535         {
 536                 const struct auth *ca;
 537
 538                 if (target->t_auth_group != NULL) {
 539                         if (target->t_auth_group->ag_name != NULL) {
 540                                 log_warnx("cannot use both auth-group and "
 541                                     "chap for target \"%s\"",
 542                                     target->t_name);
 543                                 free($2);
 544                                 free($3);
 545                                 return (1);
 546                         }
 547                 } else {
 548                         target->t_auth_group = auth_group_new(conf, NULL);
 549                         if (target->t_auth_group == NULL) {
 550                                 free($2);
 551                                 free($3);
 552                                 return (1);
 553                         }
 554                         target->t_auth_group->ag_target = target;
 555                 }
 556                 ca = auth_new_chap(target->t_auth_group, $2, $3);
 557                 free($2);
 558                 free($3);
 559                 if (ca == NULL)
 560                         return (1);
 561         }
 562         ;
 563
 564 target_chap_mutual:     CHAP_MUTUAL STR STR STR STR
 565         {
 566                 const struct auth *ca;
 567
 568                 if (target->t_auth_group != NULL) {
 569                         if (target->t_auth_group->ag_name != NULL) {
 570                                 log_warnx("cannot use both auth-group and "
 571                                     "chap-mutual for target \"%s\"",
 572                                     target->t_name);
 573                                 free($2);
 574                                 free($3);
 575                                 free($4);
 576                                 free($5);
 577                                 return (1);
 578                         }
 579                 } else {
 580                         target->t_auth_group = auth_group_new(conf, NULL);
 581                         if (target->t_auth_group == NULL) {
 582                                 free($2);
 583                                 free($3);
 584                                 free($4);
 585                                 free($5);
 586                                 return (1);
 587                         }
 588                         target->t_auth_group->ag_target = target;
 589                 }
 590                 ca = auth_new_chap_mutual(target->t_auth_group,
 591                     $2, $3, $4, $5);
 592                 free($2);
 593                 free($3);
 594                 free($4);
 595                 free($5);
 596                 if (ca == NULL)
 597                         return (1);
 598         }
 599         ;
 600
 601 target_initiator_name:  INITIATOR_NAME STR
 602         {
 603                 const struct auth_name *an;
 604
 605                 if (target->t_auth_group != NULL) {
 606                         if (target->t_auth_group->ag_name != NULL) {
 607                                 log_warnx("cannot use both auth-group and "
 608                                     "initiator-name for target \"%s\"",
 609                                     target->t_name);
 610                                 free($2);
 611                                 return (1);
 612                         }
 613                 } else {
 614                         target->t_auth_group = auth_group_new(conf, NULL);
 615                         if (target->t_auth_group == NULL) {
 616                                 free($2);
 617                                 return (1);
 618                         }
 619                         target->t_auth_group->ag_target = target;
 620                 }
 621                 an = auth_name_new(target->t_auth_group, $2);
 622                 free($2);
 623                 if (an == NULL)
 624                         return (1);
 625         }
 626         ;
 627
 628 target_initiator_portal:        INITIATOR_PORTAL STR
 629         {
 630                 const struct auth_portal *ap;
 631
 632                 if (target->t_auth_group != NULL) {
 633                         if (target->t_auth_group->ag_name != NULL) {
 634                                 log_warnx("cannot use both auth-group and "
 635                                     "initiator-portal for target \"%s\"",
 636                                     target->t_name);
 637                                 free($2);
 638                                 return (1);
 639                         }
 640                 } else {
 641                         target->t_auth_group = auth_group_new(conf, NULL);
 642                         if (target->t_auth_group == NULL) {
 643                                 free($2);
 644                                 return (1);
 645                         }
 646                         target->t_auth_group->ag_target = target;
 647                 }
 648                 ap = auth_portal_new(target->t_auth_group, $2);
 649                 free($2);
 650                 if (ap == NULL)
 651                         return (1);
 652         }
 653         ;
 654
 655 target_portal_group:    PORTAL_GROUP STR STR
 656         {
 657                 struct portal_group *tpg;
 658                 struct auth_group *tag;
 659                 struct port *tp;
 660
 661                 tpg = portal_group_find(conf, $2);
 662                 if (tpg == NULL) {
 663                         log_warnx("unknown portal-group \"%s\" for target "
 664                             "\"%s\"", $2, target->t_name);
 665                         free($2);
 666                         free($3);
 667                         return (1);
 668                 }
 669                 tag = auth_group_find(conf, $3);
 670                 if (tag == NULL) {
 671                         log_warnx("unknown auth-group \"%s\" for target "
 672                             "\"%s\"", $3, target->t_name);
 673                         free($2);
 674                         free($3);
 675                         return (1);
 676                 }
 677                 tp = port_new(conf, target, tpg);
 678                 if (tp == NULL) {
 679                         log_warnx("can't link portal-group \"%s\" to target "
 680                             "\"%s\"", $2, target->t_name);
 681                         free($2);
 682                         return (1);
 683                 }
 684                 tp->p_auth_group = tag;
 685                 free($2);
 686                 free($3);
 687         }
 688         |               PORTAL_GROUP STR
 689         {
 690                 struct portal_group *tpg;
 691                 struct port *tp;
 692
 693                 tpg = portal_group_find(conf, $2);
 694                 if (tpg == NULL) {
 695                         log_warnx("unknown portal-group \"%s\" for target "
 696                             "\"%s\"", $2, target->t_name);
 697                         free($2);
 698                         return (1);
 699                 }
 700                 tp = port_new(conf, target, tpg);
 701                 if (tp == NULL) {
 702                         log_warnx("can't link portal-group \"%s\" to target "
 703                             "\"%s\"", $2, target->t_name);
 704                         free($2);
 705                         return (1);
 706                 }
 707                 free($2);
 708         }
 709         ;
 710
 711 target_redirect:        REDIRECT STR
 712         {
 713                 int error;
 714
 715                 error = target_set_redirection(target, $2);
 716                 free($2);
 717                 if (error != 0)
 718                         return (1);
 719         }
 720         ;
 721
 722 target_lun:     LUN lun_number
 723     OPENING_BRACKET lun_entries CLOSING_BRACKET
 724         {
 725                 lun = NULL;
 726         }
 727         ;
 728
 729 lun_number:     STR
 730         {
 731                 uint64_t tmp;
 732                 char *name;
 733
 734                 if (expand_number($1, &tmp) != 0) {
 735                         yyerror("invalid numeric value");
 736                         free($1);
 737                         return (1);
 738                 }
 739
 740                 asprintf(&name, "%s,lun,%ju", target->t_name, tmp);
 741                 lun = lun_new(conf, name);
 742                 if (lun == NULL)
 743                         return (1);
 744
 745                 lun_set_scsiname(lun, name);
 746                 target->t_luns[tmp] = lun;
 747         }
 748         ;
 749
 750 target_lun_ref: LUN STR STR
 751         {
 752                 uint64_t tmp;
 753
 754                 if (expand_number($2, &tmp) != 0) {
 755                         yyerror("invalid numeric value");
 756                         free($2);
 757                         free($3);
 758                         return (1);
 759                 }
 760                 free($2);
 761
 762                 lun = lun_find(conf, $3);
 763                 free($3);
 764                 if (lun == NULL)
 765                         return (1);
 766
 767                 target->t_luns[tmp] = lun;
 768         }
 769         ;
 770
 771 lun_entries:
 772         |
 773         lun_entries lun_entry
 774         |
 775         lun_entries lun_entry SEMICOLON
 776         ;
 777
 778 lun_entry:
 779         lun_backend
 780         |
 781         lun_blocksize
 782         |
 783         lun_device_id
 784         |
 785         lun_option
 786         |
 787         lun_path
 788         |
 789         lun_serial
 790         |
 791         lun_size
 792         ;
 793
 794 lun_backend:    BACKEND STR
 795         {
 796                 if (lun->l_backend != NULL) {
 797                         log_warnx("backend for lun \"%s\" "
 798                             "specified more than once",
 799                             lun->l_name);
 800                         free($2);
 801                         return (1);
 802                 }
 803                 lun_set_backend(lun, $2);
 804                 free($2);
 805         }
 806         ;
 807
 808 lun_blocksize:  BLOCKSIZE STR
 809         {
 810                 uint64_t tmp;
 811
 812                 if (expand_number($2, &tmp) != 0) {
 813                         yyerror("invalid numeric value");
 814                         free($2);
 815                         return (1);
 816                 }
 817
 818                 if (lun->l_blocksize != 0) {
 819                         log_warnx("blocksize for lun \"%s\" "
 820                             "specified more than once",
 821                             lun->l_name);
 822                         return (1);
 823                 }
 824                 lun_set_blocksize(lun, tmp);
 825         }
 826         ;
 827
 828 lun_device_id:  DEVICE_ID STR
 829         {
 830                 if (lun->l_device_id != NULL) {
 831                         log_warnx("device_id for lun \"%s\" "
 832                             "specified more than once",
 833                             lun->l_name);
 834                         free($2);
 835                         return (1);
 836                 }
 837                 lun_set_device_id(lun, $2);
 838                 free($2);
 839         }
 840         ;
 841
 842 lun_option:     OPTION STR STR
 843         {
 844                 struct lun_option *clo;
 845
 846                 clo = lun_option_new(lun, $2, $3);
 847                 free($2);
 848                 free($3);
 849                 if (clo == NULL)
 850                         return (1);
 851         }
 852         ;
 853
 854 lun_path:       PATH STR
 855         {
 856                 if (lun->l_path != NULL) {
 857                         log_warnx("path for lun \"%s\" "
 858                             "specified more than once",
 859                             lun->l_name);
 860                         free($2);
 861                         return (1);
 862                 }
 863                 lun_set_path(lun, $2);
 864                 free($2);
 865         }
 866         ;
 867
 868 lun_serial:     SERIAL STR
 869         {
 870                 if (lun->l_serial != NULL) {
 871                         log_warnx("serial for lun \"%s\" "
 872                             "specified more than once",
 873                             lun->l_name);
 874                         free($2);
 875                         return (1);
 876                 }
 877                 lun_set_serial(lun, $2);
 878                 free($2);
 879         }
 880         ;
 881
 882 lun_size:       SIZE STR
 883         {
 884                 uint64_t tmp;
 885
 886                 if (expand_number($2, &tmp) != 0) {
 887                         yyerror("invalid numeric value");
 888                         free($2);
 889                         return (1);
 890                 }
 891
 892                 if (lun->l_size != 0) {
 893                         log_warnx("size for lun \"%s\" "
 894                             "specified more than once",
 895                             lun->l_name);
 896                         return (1);
 897                 }
 898                 lun_set_size(lun, tmp);
 899         }
 900         ;
 901 %%
 902
 903 void
 904 yyerror(const char *str)
 905 {
 906
 907         log_warnx("error in configuration file at line %d near '%s': %s",
 908             lineno, yytext, str);
 909 }
 910
 911 static void
 912 check_perms(const char *path)
 913 {
 914         struct stat sb;
 915         int error;
 916
 917         error = stat(path, &sb);
 918         if (error != 0) {
 919                 log_warn("stat");
 920                 return;
 921         }
 922         if (sb.st_mode & S_IWOTH) {
 923                 log_warnx("%s is world-writable", path);
 924         } else if (sb.st_mode & S_IROTH) {
 925                 log_warnx("%s is world-readable", path);
 926         } else if (sb.st_mode & S_IXOTH) {
 927                 /*
 928                  * Ok, this one doesn't matter, but still do it,
 929                  * just for consistency.
 930                  */
 931                 log_warnx("%s is world-executable", path);
 932         }
 933
 934         /*
 935          * XXX: Should we also check for owner != 0?
 936          */
 937 }
 938
 939 struct conf *
 940 conf_new_from_file(const char *path)
 941 {
 942         struct auth_group *ag;
 943         struct portal_group *pg;
 944         int error;
 945
 946         log_debugx("obtaining configuration from %s", path);
 947
 948         conf = conf_new();
 949
 950         ag = auth_group_new(conf, "default");
 951         assert(ag != NULL);
 952
 953         ag = auth_group_new(conf, "no-authentication");
 954         assert(ag != NULL);
 955         ag->ag_type = AG_TYPE_NO_AUTHENTICATION;
 956
 957         ag = auth_group_new(conf, "no-access");
 958         assert(ag != NULL);
 959         ag->ag_type = AG_TYPE_DENY;
 960
 961         pg = portal_group_new(conf, "default");
 962         assert(pg != NULL);
 963
 964         yyin = fopen(path, "r");
 965         if (yyin == NULL) {
 966                 log_warn("unable to open configuration file %s", path);
 967                 conf_delete(conf);
 968                 return (NULL);
 969         }
 970         check_perms(path);
 971         lineno = 1;
 972         yyrestart(yyin);
 973         error = yyparse();
 974         auth_group = NULL;
 975         portal_group = NULL;
 976         target = NULL;
 977         lun = NULL;
 978         fclose(yyin);
 979         if (error != 0) {
 980                 conf_delete(conf);
 981                 return (NULL);
 982         }
 983
 984         if (conf->conf_default_ag_defined == false) {
 985                 log_debugx("auth-group \"default\" not defined; "
 986                     "going with defaults");
 987                 ag = auth_group_find(conf, "default");
 988                 assert(ag != NULL);
 989                 ag->ag_type = AG_TYPE_DENY;
 990         }
 991
 992         if (conf->conf_default_pg_defined == false) {
 993                 log_debugx("portal-group \"default\" not defined; "
 994                     "going with defaults");
 995                 pg = portal_group_find(conf, "default");
 996                 assert(pg != NULL);
 997                 portal_group_add_listen(pg, "0.0.0.0:3260", false);
 998                 portal_group_add_listen(pg, "[::]:3260", false);
 999         }
1000
1001         conf->conf_kernel_port_on = true;
1002
1003         error = conf_verify(conf);
1004         if (error != 0) {
1005                 conf_delete(conf);
1006                 return (NULL);
1007         }
1008
1009         return (conf);
1010 }