usr.bin/iscsictl/iscsictl.c

   1 /*-
   2  * Copyright (c) 2012 The FreeBSD Foundation
   3  * All rights reserved.
   4  *
   5  * This software was developed by Edward Tomasz Napierala under sponsorship
   6  * from the FreeBSD Foundation.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/ioctl.h>
  35 #include <sys/param.h>
  36 #include <sys/linker.h>
  37 #include <assert.h>
  38 #include <ctype.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fcntl.h>
  42 #include <limits.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <unistd.h>
  47
  48 #include <iscsi_ioctl.h>
  49 #include "iscsictl.h"
  50
  51 struct conf *
  52 conf_new(void)
  53 {
  54         struct conf *conf;
  55
  56         conf = calloc(1, sizeof(*conf));
  57         if (conf == NULL)
  58                 err(1, "calloc");
  59
  60         TAILQ_INIT(&conf->conf_targets);
  61
  62         return (conf);
  63 }
  64
  65 struct target *
  66 target_find(struct conf *conf, const char *nickname)
  67 {
  68         struct target *targ;
  69
  70         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
  71                 if (targ->t_nickname != NULL &&
  72                     strcasecmp(targ->t_nickname, nickname) == 0)
  73                         return (targ);
  74         }
  75
  76         return (NULL);
  77 }
  78
  79 struct target *
  80 target_new(struct conf *conf)
  81 {
  82         struct target *targ;
  83
  84         targ = calloc(1, sizeof(*targ));
  85         if (targ == NULL)
  86                 err(1, "calloc");
  87         targ->t_conf = conf;
  88         TAILQ_INSERT_TAIL(&conf->conf_targets, targ, t_next);
  89
  90         return (targ);
  91 }
  92
  93 void
  94 target_delete(struct target *targ)
  95 {
  96
  97         TAILQ_REMOVE(&targ->t_conf->conf_targets, targ, t_next);
  98         free(targ);
  99 }
 100
 101
 102 static char *
 103 default_initiator_name(void)
 104 {
 105         char *name;
 106         size_t namelen;
 107         int error;
 108
 109         namelen = _POSIX_HOST_NAME_MAX + strlen(DEFAULT_IQN);
 110
 111         name = calloc(1, namelen + 1);
 112         if (name == NULL)
 113                 err(1, "calloc");
 114         strcpy(name, DEFAULT_IQN);
 115         error = gethostname(name + strlen(DEFAULT_IQN),
 116             namelen - strlen(DEFAULT_IQN));
 117         if (error != 0)
 118                 err(1, "gethostname");
 119
 120         return (name);
 121 }
 122
 123 static bool
 124 valid_hex(const char ch)
 125 {
 126         switch (ch) {
 127         case '0':
 128         case '1':
 129         case '2':
 130         case '3':
 131         case '4':
 132         case '5':
 133         case '6':
 134         case '7':
 135         case '8':
 136         case '9':
 137         case 'a':
 138         case 'A':
 139         case 'b':
 140         case 'B':
 141         case 'c':
 142         case 'C':
 143         case 'd':
 144         case 'D':
 145         case 'e':
 146         case 'E':
 147         case 'f':
 148         case 'F':
 149                 return (true);
 150         default:
 151                 return (false);
 152         }
 153 }
 154
 155 bool
 156 valid_iscsi_name(const char *name)
 157 {
 158         int i;
 159
 160         if (strlen(name) >= MAX_NAME_LEN) {
 161                 warnx("overlong name for \"%s\"; max length allowed "
 162                     "by iSCSI specification is %d characters",
 163                     name, MAX_NAME_LEN);
 164                 return (false);
 165         }
 166
 167         /*
 168          * In the cases below, we don't return an error, just in case the admin
 169          * was right, and we're wrong.
 170          */
 171         if (strncasecmp(name, "iqn.", strlen("iqn.")) == 0) {
 172                 for (i = strlen("iqn."); name[i] != '\0'; i++) {
 173                         /*
 174                          * XXX: We should verify UTF-8 normalisation, as defined
 175                          *      by 3.2.6.2: iSCSI Name Encoding.
 176                          */
 177                         if (isalnum(name[i]))
 178                                 continue;
 179                         if (name[i] == '-' || name[i] == '.' || name[i] == ':')
 180                                 continue;
 181                         warnx("invalid character \"%c\" in iSCSI name "
 182                             "\"%s\"; allowed characters are letters, digits, "
 183                             "'-', '.', and ':'", name[i], name);
 184                         break;
 185                 }
 186                 /*
 187                  * XXX: Check more stuff: valid date and a valid reversed domain.
 188                  */
 189         } else if (strncasecmp(name, "eui.", strlen("eui.")) == 0) {
 190                 if (strlen(name) != strlen("eui.") + 16)
 191                         warnx("invalid iSCSI name \"%s\"; the \"eui.\" "
 192                             "should be followed by exactly 16 hexadecimal "
 193                             "digits", name);
 194                 for (i = strlen("eui."); name[i] != '\0'; i++) {
 195                         if (!valid_hex(name[i])) {
 196                                 warnx("invalid character \"%c\" in iSCSI "
 197                                     "name \"%s\"; allowed characters are 1-9 "
 198                                     "and A-F", name[i], name);
 199                                 break;
 200                         }
 201                 }
 202         } else if (strncasecmp(name, "naa.", strlen("naa.")) == 0) {
 203                 if (strlen(name) > strlen("naa.") + 32)
 204                         warnx("invalid iSCSI name \"%s\"; the \"naa.\" "
 205                             "should be followed by at most 32 hexadecimal "
 206                             "digits", name);
 207                 for (i = strlen("naa."); name[i] != '\0'; i++) {
 208                         if (!valid_hex(name[i])) {
 209                                 warnx("invalid character \"%c\" in ISCSI "
 210                                     "name \"%s\"; allowed characters are 1-9 "
 211                                     "and A-F", name[i], name);
 212                                 break;
 213                         }
 214                 }
 215         } else {
 216                 warnx("invalid iSCSI name \"%s\"; should start with "
 217                     "either \".iqn\", \"eui.\", or \"naa.\"",
 218                     name);
 219         }
 220         return (true);
 221 }
 222
 223 void
 224 conf_verify(struct conf *conf)
 225 {
 226         struct target *targ;
 227
 228         TAILQ_FOREACH(targ, &conf->conf_targets, t_next) {
 229                 assert(targ->t_nickname != NULL);
 230                 if (targ->t_session_type == SESSION_TYPE_UNSPECIFIED)
 231                         targ->t_session_type = SESSION_TYPE_NORMAL;
 232                 if (targ->t_session_type == SESSION_TYPE_NORMAL &&
 233                     targ->t_name == NULL)
 234                         errx(1, "missing TargetName for target \"%s\"",
 235                             targ->t_nickname);
 236                 if (targ->t_session_type == SESSION_TYPE_DISCOVERY &&
 237                     targ->t_name != NULL)
 238                         errx(1, "cannot specify TargetName for discovery "
 239                             "sessions for target \"%s\"", targ->t_nickname);
 240                 if (targ->t_name != NULL) {
 241                         if (valid_iscsi_name(targ->t_name) == false)
 242                                 errx(1, "invalid target name \"%s\"",
 243                                     targ->t_name);
 244                 }
 245                 if (targ->t_protocol == PROTOCOL_UNSPECIFIED)
 246                         targ->t_protocol = PROTOCOL_ISCSI;
 247                 if (targ->t_address == NULL)
 248                         errx(1, "missing TargetAddress for target \"%s\"",
 249                             targ->t_nickname);
 250                 if (targ->t_initiator_name == NULL)
 251                         targ->t_initiator_name = default_initiator_name();
 252                 if (valid_iscsi_name(targ->t_initiator_name) == false)
 253                         errx(1, "invalid initiator name \"%s\"",
 254                             targ->t_initiator_name);
 255                 if (targ->t_header_digest == DIGEST_UNSPECIFIED)
 256                         targ->t_header_digest = DIGEST_NONE;
 257                 if (targ->t_data_digest == DIGEST_UNSPECIFIED)
 258                         targ->t_data_digest = DIGEST_NONE;
 259                 if (targ->t_auth_method == AUTH_METHOD_UNSPECIFIED) {
 260                         if (targ->t_user != NULL || targ->t_secret != NULL ||
 261                             targ->t_mutual_user != NULL ||
 262                             targ->t_mutual_secret != NULL)
 263                                 targ->t_auth_method =
 264                                     AUTH_METHOD_CHAP;
 265                         else
 266                                 targ->t_auth_method =
 267                                     AUTH_METHOD_NONE;
 268                 }
 269                 if (targ->t_auth_method == AUTH_METHOD_CHAP) {
 270                         if (targ->t_user == NULL) {
 271                                 errx(1, "missing chapIName for target \"%s\"",
 272                                     targ->t_nickname);
 273                         }
 274                         if (targ->t_secret == NULL)
 275                                 errx(1, "missing chapSecret for target \"%s\"",
 276                                     targ->t_nickname);
 277                         if (targ->t_mutual_user != NULL ||
 278                             targ->t_mutual_secret != NULL) {
 279                                 if (targ->t_mutual_user == NULL)
 280                                         errx(1, "missing tgtChapName for "
 281                                             "target \"%s\"", targ->t_nickname);
 282                                 if (targ->t_mutual_secret == NULL)
 283                                         errx(1, "missing tgtChapSecret for "
 284                                             "target \"%s\"", targ->t_nickname);
 285                         }
 286                 }
 287         }
 288 }
 289
 290 static void
 291 conf_from_target(struct iscsi_session_conf *conf,
 292     const struct target *targ)
 293 {
 294         memset(conf, 0, sizeof(*conf));
 295
 296         /*
 297          * XXX: Check bounds and return error instead of silently truncating.
 298          */
 299         if (targ->t_initiator_name != NULL)
 300                 strlcpy(conf->isc_initiator, targ->t_initiator_name,
 301                     sizeof(conf->isc_initiator));
 302         if (targ->t_initiator_address != NULL)
 303                 strlcpy(conf->isc_initiator_addr, targ->t_initiator_address,
 304                     sizeof(conf->isc_initiator_addr));
 305         if (targ->t_initiator_alias != NULL)
 306                 strlcpy(conf->isc_initiator_alias, targ->t_initiator_alias,
 307                     sizeof(conf->isc_initiator_alias));
 308         if (targ->t_name != NULL)
 309                 strlcpy(conf->isc_target, targ->t_name,
 310                     sizeof(conf->isc_target));
 311         if (targ->t_address != NULL)
 312                 strlcpy(conf->isc_target_addr, targ->t_address,
 313                     sizeof(conf->isc_target_addr));
 314         if (targ->t_user != NULL)
 315                 strlcpy(conf->isc_user, targ->t_user,
 316                     sizeof(conf->isc_user));
 317         if (targ->t_secret != NULL)
 318                 strlcpy(conf->isc_secret, targ->t_secret,
 319                     sizeof(conf->isc_secret));
 320         if (targ->t_mutual_user != NULL)
 321                 strlcpy(conf->isc_mutual_user, targ->t_mutual_user,
 322                     sizeof(conf->isc_mutual_user));
 323         if (targ->t_mutual_secret != NULL)
 324                 strlcpy(conf->isc_mutual_secret, targ->t_mutual_secret,
 325                     sizeof(conf->isc_mutual_secret));
 326         if (targ->t_session_type == SESSION_TYPE_DISCOVERY)
 327                 conf->isc_discovery = 1;
 328         if (targ->t_protocol == PROTOCOL_ISER)
 329                 conf->isc_iser = 1;
 330         if (targ->t_header_digest == DIGEST_CRC32C)
 331                 conf->isc_header_digest = ISCSI_DIGEST_CRC32C;
 332         else
 333                 conf->isc_header_digest = ISCSI_DIGEST_NONE;
 334         if (targ->t_data_digest == DIGEST_CRC32C)
 335                 conf->isc_data_digest = ISCSI_DIGEST_CRC32C;
 336         else
 337                 conf->isc_data_digest = ISCSI_DIGEST_NONE;
 338 }
 339
 340 static int
 341 kernel_add(int iscsi_fd, const struct target *targ)
 342 {
 343         struct iscsi_session_add isa;
 344         int error;
 345
 346         memset(&isa, 0, sizeof(isa));
 347         conf_from_target(&isa.isa_conf, targ);
 348         error = ioctl(iscsi_fd, ISCSISADD, &isa);
 349         if (error != 0)
 350                 warn("ISCSISADD");
 351         return (error);
 352 }
 353
 354 static int
 355 kernel_modify(int iscsi_fd, unsigned int session_id, const struct target *targ)
 356 {
 357         struct iscsi_session_modify ism;
 358         int error;
 359
 360         memset(&ism, 0, sizeof(ism));
 361         ism.ism_session_id = session_id;
 362         conf_from_target(&ism.ism_conf, targ);
 363         error = ioctl(iscsi_fd, ISCSISMODIFY, &ism);
 364         if (error != 0)
 365                 warn("ISCSISMODIFY");
 366         return (error);
 367 }
 368
 369 static void
 370 kernel_modify_some(int iscsi_fd, unsigned int session_id, const char *target,
 371   const char *target_addr, const char *user, const char *secret)
 372 {
 373         struct iscsi_session_state *states = NULL;
 374         struct iscsi_session_state *state;
 375         struct iscsi_session_conf *conf;
 376         struct iscsi_session_list isl;
 377         struct iscsi_session_modify ism;
 378         unsigned int i, nentries = 1;
 379         int error;
 380
 381         for (;;) {
 382                 states = realloc(states,
 383                     nentries * sizeof(struct iscsi_session_state));
 384                 if (states == NULL)
 385                         err(1, "realloc");
 386
 387                 memset(&isl, 0, sizeof(isl));
 388                 isl.isl_nentries = nentries;
 389                 isl.isl_pstates = states;
 390
 391                 error = ioctl(iscsi_fd, ISCSISLIST, &isl);
 392                 if (error != 0 && errno == EMSGSIZE) {
 393                         nentries *= 4;
 394                         continue;
 395                 }
 396                 break;
 397         }
 398         if (error != 0)
 399                 errx(1, "ISCSISLIST");
 400
 401         for (i = 0; i < isl.isl_nentries; i++) {
 402                 state = &states[i];
 403
 404                 if (state->iss_id == session_id)
 405                         break;
 406         }
 407         if (i == isl.isl_nentries)
 408                 errx(1, "session-id %u not found", session_id);
 409
 410         conf = &state->iss_conf;
 411
 412         if (target != NULL)
 413                 strlcpy(conf->isc_target, target, sizeof(conf->isc_target));
 414         if (target_addr != NULL)
 415                 strlcpy(conf->isc_target_addr, target_addr,
 416                     sizeof(conf->isc_target_addr));
 417         if (user != NULL)
 418                 strlcpy(conf->isc_user, user, sizeof(conf->isc_user));
 419         if (secret != NULL)
 420                 strlcpy(conf->isc_secret, secret, sizeof(conf->isc_secret));
 421
 422         memset(&ism, 0, sizeof(ism));
 423         ism.ism_session_id = session_id;
 424         memcpy(&ism.ism_conf, conf, sizeof(ism.ism_conf));
 425         error = ioctl(iscsi_fd, ISCSISMODIFY, &ism);
 426         if (error != 0)
 427                 warn("ISCSISMODIFY");
 428 }
 429
 430 static int
 431 kernel_remove(int iscsi_fd, const struct target *targ)
 432 {
 433         struct iscsi_session_remove isr;
 434         int error;
 435
 436         memset(&isr, 0, sizeof(isr));
 437         conf_from_target(&isr.isr_conf, targ);
 438         error = ioctl(iscsi_fd, ISCSISREMOVE, &isr);
 439         if (error != 0)
 440                 warn("ISCSISREMOVE");
 441         return (error);
 442 }
 443
 444 /*
 445  * XXX: Add filtering.
 446  */
 447 static int
 448 kernel_list(int iscsi_fd, const struct target *targ __unused,
 449     int verbose)
 450 {
 451         struct iscsi_session_state *states = NULL;
 452         const struct iscsi_session_state *state;
 453         const struct iscsi_session_conf *conf;
 454         struct iscsi_session_list isl;
 455         unsigned int i, nentries = 1;
 456         int error;
 457
 458         for (;;) {
 459                 states = realloc(states,
 460                     nentries * sizeof(struct iscsi_session_state));
 461                 if (states == NULL)
 462                         err(1, "realloc");
 463
 464                 memset(&isl, 0, sizeof(isl));
 465                 isl.isl_nentries = nentries;
 466                 isl.isl_pstates = states;
 467
 468                 error = ioctl(iscsi_fd, ISCSISLIST, &isl);
 469                 if (error != 0 && errno == EMSGSIZE) {
 470                         nentries *= 4;
 471                         continue;
 472                 }
 473                 break;
 474         }
 475         if (error != 0) {
 476                 warn("ISCSISLIST");
 477                 return (error);
 478         }
 479
 480         if (verbose != 0) {
 481                 for (i = 0; i < isl.isl_nentries; i++) {
 482                         state = &states[i];
 483                         conf = &state->iss_conf;
 484
 485                         printf("Session ID:       %u\n", state->iss_id);
 486                         printf("Initiator name:   %s\n", conf->isc_initiator);
 487                         printf("Initiator portal: %s\n",
 488                             conf->isc_initiator_addr);
 489                         printf("Initiator alias:  %s\n",
 490                             conf->isc_initiator_alias);
 491                         printf("Target name:      %s\n", conf->isc_target);
 492                         printf("Target portal:    %s\n",
 493                             conf->isc_target_addr);
 494                         printf("Target alias:     %s\n",
 495                             state->iss_target_alias);
 496                         printf("User:             %s\n", conf->isc_user);
 497                         printf("Secret:           %s\n", conf->isc_secret);
 498                         printf("Mutual user:      %s\n",
 499                             conf->isc_mutual_user);
 500                         printf("Mutual secret:    %s\n",
 501                             conf->isc_mutual_secret);
 502                         printf("Session type:     %s\n",
 503                             conf->isc_discovery ? "Discovery" : "Normal");
 504                         printf("Session state:    %s\n",
 505                             state->iss_connected ?
 506                             "Connected" : "Disconnected");
 507                         printf("Failure reason:   %s\n", state->iss_reason);
 508                         printf("Header digest:    %s\n",
 509                             state->iss_header_digest == ISCSI_DIGEST_CRC32C ?
 510                             "CRC32C" : "None");
 511                         printf("Data digest:      %s\n",
 512                             state->iss_data_digest == ISCSI_DIGEST_CRC32C ?
 513                             "CRC32C" : "None");
 514                         printf("DataSegmentLen:   %d\n",
 515                             state->iss_max_data_segment_length);
 516                         printf("ImmediateData:    %s\n",
 517                             state->iss_immediate_data ? "Yes" : "No");
 518                         printf("iSER (RDMA):      %s\n",
 519                             conf->isc_iser ? "Yes" : "No");
 520                         printf("Device nodes:     ");
 521                         print_periphs(state->iss_id);
 522                         printf("\n\n");
 523                 }
 524         } else {
 525                 printf("%-36s %-16s %s\n",
 526                     "Target name", "Target portal", "State");
 527                 for (i = 0; i < isl.isl_nentries; i++) {
 528                         state = &states[i];
 529                         conf = &state->iss_conf;
 530
 531                         printf("%-36s %-16s ",
 532                             conf->isc_target, conf->isc_target_addr);
 533
 534                         if (state->iss_reason[0] != '\0') {
 535                                 printf("%s\n", state->iss_reason);
 536                         } else {
 537                                 if (conf->isc_discovery) {
 538                                         printf("Discovery\n");
 539                                 } else if (state->iss_connected) {
 540                                         printf("Connected: ");
 541                                         print_periphs(state->iss_id);
 542                                         printf("\n");
 543                                 } else {
 544                                         printf("Disconnected\n");
 545                                 }
 546                         }
 547                 }
 548         }
 549
 550         return (0);
 551 }
 552
 553 static void
 554 usage(void)
 555 {
 556
 557         fprintf(stderr, "usage: iscsictl -A -p portal -t target "
 558             "[-u user -s secret]\n");
 559         fprintf(stderr, "       iscsictl -A -d discovery-host "
 560             "[-u user -s secret]\n");
 561         fprintf(stderr, "       iscsictl -A -a [-c path]\n");
 562         fprintf(stderr, "       iscsictl -A -n nickname [-c path]\n");
 563         fprintf(stderr, "       iscsictl -M -i session-id [-p portal] "
 564             "[-t target] [-u user] [-s secret]\n");
 565         fprintf(stderr, "       iscsictl -M -i session-id -n nickname "
 566             "[-c path]\n");
 567         fprintf(stderr, "       iscsictl -R [-p portal] [-t target]\n");
 568         fprintf(stderr, "       iscsictl -R -a\n");
 569         fprintf(stderr, "       iscsictl -R -n nickname [-c path]\n");
 570         fprintf(stderr, "       iscsictl -L [-v]\n");
 571         exit(1);
 572 }
 573
 574 char *
 575 checked_strdup(const char *s)
 576 {
 577         char *c;
 578
 579         c = strdup(s);
 580         if (c == NULL)
 581                 err(1, "strdup");
 582         return (c);
 583 }
 584
 585 int
 586 main(int argc, char **argv)
 587 {
 588         int Aflag = 0, Mflag = 0, Rflag = 0, Lflag = 0, aflag = 0, vflag = 0;
 589         const char *conf_path = DEFAULT_CONFIG_PATH;
 590         char *nickname = NULL, *discovery_host = NULL, *portal = NULL,
 591              *target = NULL, *user = NULL, *secret = NULL;
 592         long long session_id = -1;
 593         char *end;
 594         int ch, error, iscsi_fd, retval, saved_errno;
 595         int failed = 0;
 596         struct conf *conf;
 597         struct target *targ;
 598
 599         while ((ch = getopt(argc, argv, "AMRLac:d:i:n:p:t:u:s:v")) != -1) {
 600                 switch (ch) {
 601                 case 'A':
 602                         Aflag = 1;
 603                         break;
 604                 case 'M':
 605                         Mflag = 1;
 606                         break;
 607                 case 'R':
 608                         Rflag = 1;
 609                         break;
 610                 case 'L':
 611                         Lflag = 1;
 612                         break;
 613                 case 'a':
 614                         aflag = 1;
 615                         break;
 616                 case 'c':
 617                         conf_path = optarg;
 618                         break;
 619                 case 'd':
 620                         discovery_host = optarg;
 621                         break;
 622                 case 'i':
 623                         session_id = strtol(optarg, &end, 10);
 624                         if ((size_t)(end - optarg) != strlen(optarg))
 625                                 errx(1, "trailing characters after session-id");
 626                         if (session_id < 0)
 627                                 errx(1, "session-id cannot be negative");
 628                         if (session_id > UINT_MAX)
 629                                 errx(1, "session-id cannot be greater than %u",
 630                                     UINT_MAX);
 631                         break;
 632                 case 'n':
 633                         nickname = optarg;
 634                         break;
 635                 case 'p':
 636                         portal = optarg;
 637                         break;
 638                 case 't':
 639                         target = optarg;
 640                         break;
 641                 case 'u':
 642                         user = optarg;
 643                         break;
 644                 case 's':
 645                         secret = optarg;
 646                         break;
 647                 case 'v':
 648                         vflag = 1;
 649                         break;
 650                 case '?':
 651                 default:
 652                         usage();
 653                 }
 654         }
 655         argc -= optind;
 656         if (argc != 0)
 657                 usage();
 658
 659         if (Aflag + Mflag + Rflag + Lflag == 0)
 660                 Lflag = 1;
 661         if (Aflag + Mflag + Rflag + Lflag > 1)
 662                 errx(1, "at most one of -A, -M, -R, or -L may be specified");
 663
 664         /*
 665          * Note that we ignore unneccessary/inapplicable "-c" flag; so that
 666          * people can do something like "alias ISCSICTL="iscsictl -c path"
 667          * in shell scripts.
 668          */
 669         if (Aflag != 0) {
 670                 if (aflag != 0) {
 671                         if (portal != NULL)
 672                                 errx(1, "-a and -p and mutually exclusive");
 673                         if (target != NULL)
 674                                 errx(1, "-a and -t and mutually exclusive");
 675                         if (user != NULL)
 676                                 errx(1, "-a and -u and mutually exclusive");
 677                         if (secret != NULL)
 678                                 errx(1, "-a and -s and mutually exclusive");
 679                         if (nickname != NULL)
 680                                 errx(1, "-a and -n and mutually exclusive");
 681                         if (discovery_host != NULL)
 682                                 errx(1, "-a and -d and mutually exclusive");
 683                 } else if (nickname != NULL) {
 684                         if (portal != NULL)
 685                                 errx(1, "-n and -p and mutually exclusive");
 686                         if (target != NULL)
 687                                 errx(1, "-n and -t and mutually exclusive");
 688                         if (user != NULL)
 689                                 errx(1, "-n and -u and mutually exclusive");
 690                         if (secret != NULL)
 691                                 errx(1, "-n and -s and mutually exclusive");
 692                         if (discovery_host != NULL)
 693                                 errx(1, "-n and -d and mutually exclusive");
 694                 } else if (discovery_host != NULL) {
 695                         if (portal != NULL)
 696                                 errx(1, "-d and -p and mutually exclusive");
 697                         if (target != NULL)
 698                                 errx(1, "-d and -t and mutually exclusive");
 699                 } else {
 700                         if (target == NULL && portal == NULL)
 701                                 errx(1, "must specify -a, -n or -t/-p");
 702
 703                         if (target != NULL && portal == NULL)
 704                                 errx(1, "-t must always be used with -p");
 705                         if (portal != NULL && target == NULL)
 706                                 errx(1, "-p must always be used with -t");
 707                 }
 708
 709                 if (user != NULL && secret == NULL)
 710                         errx(1, "-u must always be used with -s");
 711                 if (secret != NULL && user == NULL)
 712                         errx(1, "-s must always be used with -u");
 713
 714                 if (session_id != -1)
 715                         errx(1, "-i cannot be used with -A");
 716                 if (vflag != 0)
 717                         errx(1, "-v cannot be used with -A");
 718
 719         } else if (Mflag != 0) {
 720                 if (session_id == -1)
 721                         errx(1, "-M requires -i");
 722
 723                 if (discovery_host != NULL)
 724                         errx(1, "-M and -d are mutually exclusive");
 725                 if (aflag != 0)
 726                         errx(1, "-M and -a are mutually exclusive");
 727                 if (nickname != NULL) {
 728                         if (portal != NULL)
 729                                 errx(1, "-n and -p and mutually exclusive");
 730                         if (target != NULL)
 731                                 errx(1, "-n and -t and mutually exclusive");
 732                         if (user != NULL)
 733                                 errx(1, "-n and -u and mutually exclusive");
 734                         if (secret != NULL)
 735                                 errx(1, "-n and -s and mutually exclusive");
 736                 }
 737
 738                 if (vflag != 0)
 739                         errx(1, "-v cannot be used with -M");
 740
 741         } else if (Rflag != 0) {
 742                 if (user != NULL)
 743                         errx(1, "-R and -u are mutually exclusive");
 744                 if (secret != NULL)
 745                         errx(1, "-R and -s are mutually exclusive");
 746                 if (discovery_host != NULL)
 747                         errx(1, "-R and -d are mutually exclusive");
 748
 749                 if (aflag != 0) {
 750                         if (portal != NULL)
 751                                 errx(1, "-a and -p and mutually exclusive");
 752                         if (target != NULL)
 753                                 errx(1, "-a and -t and mutually exclusive");
 754                         if (nickname != NULL)
 755                                 errx(1, "-a and -n and mutually exclusive");
 756                 } else if (nickname != NULL) {
 757                         if (portal != NULL)
 758                                 errx(1, "-n and -p and mutually exclusive");
 759                         if (target != NULL)
 760                                 errx(1, "-n and -t and mutually exclusive");
 761                 } else if (target == NULL && portal == NULL) {
 762                         errx(1, "must specify either -a, -n, -t, or -p");
 763                 }
 764
 765                 if (session_id != -1)
 766                         errx(1, "-i cannot be used with -R");
 767                 if (vflag != 0)
 768                         errx(1, "-v cannot be used with -R");
 769
 770         } else {
 771                 assert(Lflag != 0);
 772
 773                 if (portal != NULL)
 774                         errx(1, "-L and -p and mutually exclusive");
 775                 if (target != NULL)
 776                         errx(1, "-L and -t and mutually exclusive");
 777                 if (user != NULL)
 778                         errx(1, "-L and -u and mutually exclusive");
 779                 if (secret != NULL)
 780                         errx(1, "-L and -s and mutually exclusive");
 781                 if (nickname != NULL)
 782                         errx(1, "-L and -n and mutually exclusive");
 783                 if (discovery_host != NULL)
 784                         errx(1, "-L and -d and mutually exclusive");
 785
 786                 if (session_id != -1)
 787                         errx(1, "-i cannot be used with -L");
 788         }
 789
 790         iscsi_fd = open(ISCSI_PATH, O_RDWR);
 791         if (iscsi_fd < 0 && errno == ENOENT) {
 792                 saved_errno = errno;
 793                 retval = kldload("iscsi");
 794                 if (retval != -1)
 795                         iscsi_fd = open(ISCSI_PATH, O_RDWR);
 796                 else
 797                         errno = saved_errno;
 798         }
 799         if (iscsi_fd < 0)
 800                 err(1, "failed to open %s", ISCSI_PATH);
 801
 802         if (Aflag != 0 && aflag != 0) {
 803                 conf = conf_new_from_file(conf_path);
 804
 805                 TAILQ_FOREACH(targ, &conf->conf_targets, t_next)
 806                         failed += kernel_add(iscsi_fd, targ);
 807         } else if (nickname != NULL) {
 808                 conf = conf_new_from_file(conf_path);
 809                 targ = target_find(conf, nickname);
 810                 if (targ == NULL)
 811                         errx(1, "target %s not found in %s",
 812                             nickname, conf_path);
 813
 814                 if (Aflag != 0)
 815                         failed += kernel_add(iscsi_fd, targ);
 816                 else if (Mflag != 0)
 817                         failed += kernel_modify(iscsi_fd, session_id, targ);
 818                 else if (Rflag != 0)
 819                         failed += kernel_remove(iscsi_fd, targ);
 820                 else
 821                         failed += kernel_list(iscsi_fd, targ, vflag);
 822         } else if (Mflag != 0) {
 823                 kernel_modify_some(iscsi_fd, session_id, target, portal,
 824                     user, secret);
 825         } else {
 826                 if (Aflag != 0 && target != NULL) {
 827                         if (valid_iscsi_name(target) == false)
 828                                 errx(1, "invalid target name \"%s\"", target);
 829                 }
 830                 conf = conf_new();
 831                 targ = target_new(conf);
 832                 targ->t_initiator_name = default_initiator_name();
 833                 targ->t_header_digest = DIGEST_NONE;
 834                 targ->t_data_digest = DIGEST_NONE;
 835                 targ->t_name = target;
 836                 if (discovery_host != NULL) {
 837                         targ->t_session_type = SESSION_TYPE_DISCOVERY;
 838                         targ->t_address = discovery_host;
 839                 } else {
 840                         targ->t_session_type = SESSION_TYPE_NORMAL;
 841                         targ->t_address = portal;
 842                 }
 843                 targ->t_user = user;
 844                 targ->t_secret = secret;
 845
 846                 if (Aflag != 0)
 847                         failed += kernel_add(iscsi_fd, targ);
 848                 else if (Rflag != 0)
 849                         failed += kernel_remove(iscsi_fd, targ);
 850                 else
 851                         failed += kernel_list(iscsi_fd, targ, vflag);
 852         }
 853
 854         error = close(iscsi_fd);
 855         if (error != 0)
 856                 err(1, "close");
 857
 858         if (failed > 0)
 859                 return (1);
 860         return (0);
 861 }