usr.sbin/ctld/kernel.c

   1 /*-
   2  * Copyright (c) 2003, 2004 Silicon Graphics International Corp.
   3  * Copyright (c) 1997-2007 Kenneth D. Merry
   4  * Copyright (c) 2012 The FreeBSD Foundation
   5  * All rights reserved.
   6  *
   7  * Portions of this software were developed by Edward Tomasz Napierala
   8  * under sponsorship from the FreeBSD Foundation.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions, and the following disclaimer,
  15  *    without modification.
  16  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  17  *    substantially similar to the "NO WARRANTY" disclaimer below
  18  *    ("Disclaimer") and any redistribution must be conditioned upon
  19  *    including a substantially similar Disclaimer requirement for further
  20  *    binary redistribution.
  21  *
  22  * NO WARRANTY
  23  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  26  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  31  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  32  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGES.
  34  *
  35  * $FreeBSD$
  36  */
  37
  38 #include <sys/ioctl.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <sys/param.h>
  42 #include <sys/linker.h>
  43 #include <sys/queue.h>
  44 #include <sys/callout.h>
  45 #include <sys/sbuf.h>
  46 #include <sys/capability.h>
  47 #include <assert.h>
  48 #include <bsdxml.h>
  49 #include <ctype.h>
  50 #include <errno.h>
  51 #include <fcntl.h>
  52 #include <stdint.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <strings.h>
  57 #include <cam/scsi/scsi_all.h>
  58 #include <cam/scsi/scsi_message.h>
  59 #include <cam/ctl/ctl.h>
  60 #include <cam/ctl/ctl_io.h>
  61 #include <cam/ctl/ctl_frontend_internal.h>
  62 #include <cam/ctl/ctl_backend.h>
  63 #include <cam/ctl/ctl_ioctl.h>
  64 #include <cam/ctl/ctl_backend_block.h>
  65 #include <cam/ctl/ctl_util.h>
  66 #include <cam/ctl/ctl_scsi_all.h>
  67
  68 #include "ctld.h"
  69
  70 #ifdef ICL_KERNEL_PROXY
  71 #include <netdb.h>
  72 #endif
  73
  74 extern bool proxy_mode;
  75
  76 static int      ctl_fd = 0;
  77
  78 void
  79 kernel_init(void)
  80 {
  81         int retval, saved_errno;
  82
  83         ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
  84         if (ctl_fd < 0 && errno == ENOENT) {
  85                 saved_errno = errno;
  86                 retval = kldload("ctl");
  87                 if (retval != -1)
  88                         ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
  89                 else
  90                         errno = saved_errno;
  91         }
  92         if (ctl_fd < 0)
  93                 log_err(1, "failed to open %s", CTL_DEFAULT_DEV);
  94 }
  95
  96 /*
  97  * Name/value pair used for per-LUN attributes.
  98  */
  99 struct cctl_lun_nv {
 100         char *name;
 101         char *value;
 102         STAILQ_ENTRY(cctl_lun_nv) links;
 103 };
 104
 105 /*
 106  * Backend LUN information.
 107  */
 108 struct cctl_lun {
 109         uint64_t lun_id;
 110         char *backend_type;
 111         uint64_t size_blocks;
 112         uint32_t blocksize;
 113         char *serial_number;
 114         char *device_id;
 115         char *cfiscsi_target;
 116         int cfiscsi_lun;
 117         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 118         STAILQ_ENTRY(cctl_lun) links;
 119 };
 120
 121 struct cctl_port {
 122         uint32_t port_id;
 123         char *cfiscsi_target;
 124         uint16_t cfiscsi_portal_group_tag;
 125         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 126         STAILQ_ENTRY(cctl_port) links;
 127 };
 128
 129 struct cctl_devlist_data {
 130         int num_luns;
 131         STAILQ_HEAD(,cctl_lun) lun_list;
 132         struct cctl_lun *cur_lun;
 133         int num_ports;
 134         STAILQ_HEAD(,cctl_port) port_list;
 135         struct cctl_port *cur_port;
 136         int level;
 137         struct sbuf *cur_sb[32];
 138 };
 139
 140 static void
 141 cctl_start_element(void *user_data, const char *name, const char **attr)
 142 {
 143         int i;
 144         struct cctl_devlist_data *devlist;
 145         struct cctl_lun *cur_lun;
 146
 147         devlist = (struct cctl_devlist_data *)user_data;
 148         cur_lun = devlist->cur_lun;
 149         devlist->level++;
 150         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 151             sizeof(devlist->cur_sb[0])))
 152                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 153                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 154
 155         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 156         if (devlist->cur_sb[devlist->level] == NULL)
 157                 log_err(1, "%s: unable to allocate sbuf", __func__);
 158
 159         if (strcmp(name, "lun") == 0) {
 160                 if (cur_lun != NULL)
 161                         log_errx(1, "%s: improper lun element nesting",
 162                             __func__);
 163
 164                 cur_lun = calloc(1, sizeof(*cur_lun));
 165                 if (cur_lun == NULL)
 166                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 167                             sizeof(*cur_lun));
 168
 169                 devlist->num_luns++;
 170                 devlist->cur_lun = cur_lun;
 171
 172                 STAILQ_INIT(&cur_lun->attr_list);
 173                 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links);
 174
 175                 for (i = 0; attr[i] != NULL; i += 2) {
 176                         if (strcmp(attr[i], "id") == 0) {
 177                                 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0);
 178                         } else {
 179                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 180                                      __func__, attr[i], attr[i+1]);
 181                         }
 182                 }
 183         }
 184 }
 185
 186 static void
 187 cctl_end_element(void *user_data, const char *name)
 188 {
 189         struct cctl_devlist_data *devlist;
 190         struct cctl_lun *cur_lun;
 191         char *str;
 192
 193         devlist = (struct cctl_devlist_data *)user_data;
 194         cur_lun = devlist->cur_lun;
 195
 196         if ((cur_lun == NULL)
 197          && (strcmp(name, "ctllunlist") != 0))
 198                 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name);
 199
 200         if (devlist->cur_sb[devlist->level] == NULL)
 201                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 202                      devlist->level, name);
 203
 204         sbuf_finish(devlist->cur_sb[devlist->level]);
 205         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 206
 207         if (strlen(str) == 0) {
 208                 free(str);
 209                 str = NULL;
 210         }
 211
 212         sbuf_delete(devlist->cur_sb[devlist->level]);
 213         devlist->cur_sb[devlist->level] = NULL;
 214         devlist->level--;
 215
 216         if (strcmp(name, "backend_type") == 0) {
 217                 cur_lun->backend_type = str;
 218                 str = NULL;
 219         } else if (strcmp(name, "size") == 0) {
 220                 cur_lun->size_blocks = strtoull(str, NULL, 0);
 221         } else if (strcmp(name, "blocksize") == 0) {
 222                 cur_lun->blocksize = strtoul(str, NULL, 0);
 223         } else if (strcmp(name, "serial_number") == 0) {
 224                 cur_lun->serial_number = str;
 225                 str = NULL;
 226         } else if (strcmp(name, "device_id") == 0) {
 227                 cur_lun->device_id = str;
 228                 str = NULL;
 229         } else if (strcmp(name, "cfiscsi_target") == 0) {
 230                 cur_lun->cfiscsi_target = str;
 231                 str = NULL;
 232         } else if (strcmp(name, "cfiscsi_lun") == 0) {
 233                 cur_lun->cfiscsi_lun = strtoul(str, NULL, 0);
 234         } else if (strcmp(name, "lun") == 0) {
 235                 devlist->cur_lun = NULL;
 236         } else if (strcmp(name, "ctllunlist") == 0) {
 237
 238         } else {
 239                 struct cctl_lun_nv *nv;
 240
 241                 nv = calloc(1, sizeof(*nv));
 242                 if (nv == NULL)
 243                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 244                             __func__, sizeof(*nv));
 245
 246                 nv->name = checked_strdup(name);
 247
 248                 nv->value = str;
 249                 str = NULL;
 250                 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links);
 251         }
 252
 253         free(str);
 254 }
 255
 256 static void
 257 cctl_start_pelement(void *user_data, const char *name, const char **attr)
 258 {
 259         int i;
 260         struct cctl_devlist_data *devlist;
 261         struct cctl_port *cur_port;
 262
 263         devlist = (struct cctl_devlist_data *)user_data;
 264         cur_port = devlist->cur_port;
 265         devlist->level++;
 266         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 267             sizeof(devlist->cur_sb[0])))
 268                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 269                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 270
 271         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 272         if (devlist->cur_sb[devlist->level] == NULL)
 273                 log_err(1, "%s: unable to allocate sbuf", __func__);
 274
 275         if (strcmp(name, "targ_port") == 0) {
 276                 if (cur_port != NULL)
 277                         log_errx(1, "%s: improper port element nesting (%s)",
 278                             __func__, name);
 279
 280                 cur_port = calloc(1, sizeof(*cur_port));
 281                 if (cur_port == NULL)
 282                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 283                             sizeof(*cur_port));
 284
 285                 devlist->num_ports++;
 286                 devlist->cur_port = cur_port;
 287
 288                 STAILQ_INIT(&cur_port->attr_list);
 289                 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links);
 290
 291                 for (i = 0; attr[i] != NULL; i += 2) {
 292                         if (strcmp(attr[i], "id") == 0) {
 293                                 cur_port->port_id = strtoul(attr[i+1], NULL, 0);
 294                         } else {
 295                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 296                                      __func__, attr[i], attr[i+1]);
 297                         }
 298                 }
 299         }
 300 }
 301
 302 static void
 303 cctl_end_pelement(void *user_data, const char *name)
 304 {
 305         struct cctl_devlist_data *devlist;
 306         struct cctl_port *cur_port;
 307         char *str;
 308
 309         devlist = (struct cctl_devlist_data *)user_data;
 310         cur_port = devlist->cur_port;
 311
 312         if ((cur_port == NULL)
 313          && (strcmp(name, "ctlportlist") != 0))
 314                 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name);
 315
 316         if (devlist->cur_sb[devlist->level] == NULL)
 317                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 318                      devlist->level, name);
 319
 320         sbuf_finish(devlist->cur_sb[devlist->level]);
 321         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 322
 323         if (strlen(str) == 0) {
 324                 free(str);
 325                 str = NULL;
 326         }
 327
 328         sbuf_delete(devlist->cur_sb[devlist->level]);
 329         devlist->cur_sb[devlist->level] = NULL;
 330         devlist->level--;
 331
 332         if (strcmp(name, "cfiscsi_target") == 0) {
 333                 cur_port->cfiscsi_target = str;
 334                 str = NULL;
 335         } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) {
 336                 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0);
 337         } else if (strcmp(name, "targ_port") == 0) {
 338                 devlist->cur_port = NULL;
 339         } else if (strcmp(name, "ctlportlist") == 0) {
 340
 341         } else {
 342                 struct cctl_lun_nv *nv;
 343
 344                 nv = calloc(1, sizeof(*nv));
 345                 if (nv == NULL)
 346                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 347                             __func__, sizeof(*nv));
 348
 349                 nv->name = checked_strdup(name);
 350
 351                 nv->value = str;
 352                 str = NULL;
 353                 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links);
 354         }
 355
 356         free(str);
 357 }
 358
 359 static void
 360 cctl_char_handler(void *user_data, const XML_Char *str, int len)
 361 {
 362         struct cctl_devlist_data *devlist;
 363
 364         devlist = (struct cctl_devlist_data *)user_data;
 365
 366         sbuf_bcat(devlist->cur_sb[devlist->level], str, len);
 367 }
 368
 369 struct conf *
 370 conf_new_from_kernel(void)
 371 {
 372         struct conf *conf = NULL;
 373         struct target *targ;
 374         struct lun *cl;
 375         struct lun_option *lo;
 376         struct ctl_lun_list list;
 377         struct cctl_devlist_data devlist;
 378         struct cctl_lun *lun;
 379         struct cctl_port *port;
 380         XML_Parser parser;
 381         char *str;
 382         int len, retval;
 383
 384         bzero(&devlist, sizeof(devlist));
 385         STAILQ_INIT(&devlist.lun_list);
 386         STAILQ_INIT(&devlist.port_list);
 387
 388         log_debugx("obtaining previously configured CTL luns from the kernel");
 389
 390         str = NULL;
 391         len = 4096;
 392 retry:
 393         str = realloc(str, len);
 394         if (str == NULL)
 395                 log_err(1, "realloc");
 396
 397         bzero(&list, sizeof(list));
 398         list.alloc_len = len;
 399         list.status = CTL_LUN_LIST_NONE;
 400         list.lun_xml = str;
 401
 402         if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) {
 403                 log_warn("error issuing CTL_LUN_LIST ioctl");
 404                 free(str);
 405                 return (NULL);
 406         }
 407
 408         if (list.status == CTL_LUN_LIST_ERROR) {
 409                 log_warnx("error returned from CTL_LUN_LIST ioctl: %s",
 410                     list.error_str);
 411                 free(str);
 412                 return (NULL);
 413         }
 414
 415         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 416                 len = len << 1;
 417                 goto retry;
 418         }
 419
 420         parser = XML_ParserCreate(NULL);
 421         if (parser == NULL) {
 422                 log_warnx("unable to create XML parser");
 423                 free(str);
 424                 return (NULL);
 425         }
 426
 427         XML_SetUserData(parser, &devlist);
 428         XML_SetElementHandler(parser, cctl_start_element, cctl_end_element);
 429         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 430
 431         retval = XML_Parse(parser, str, strlen(str), 1);
 432         XML_ParserFree(parser);
 433         free(str);
 434         if (retval != 1) {
 435                 log_warnx("XML_Parse failed");
 436                 return (NULL);
 437         }
 438
 439         str = NULL;
 440         len = 4096;
 441 retry_port:
 442         str = realloc(str, len);
 443         if (str == NULL)
 444                 log_err(1, "realloc");
 445
 446         bzero(&list, sizeof(list));
 447         list.alloc_len = len;
 448         list.status = CTL_LUN_LIST_NONE;
 449         list.lun_xml = str;
 450
 451         if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) {
 452                 log_warn("error issuing CTL_PORT_LIST ioctl");
 453                 free(str);
 454                 return (NULL);
 455         }
 456
 457         if (list.status == CTL_PORT_LIST_ERROR) {
 458                 log_warnx("error returned from CTL_PORT_LIST ioctl: %s",
 459                     list.error_str);
 460                 free(str);
 461                 return (NULL);
 462         }
 463
 464         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 465                 len = len << 1;
 466                 goto retry_port;
 467         }
 468
 469         parser = XML_ParserCreate(NULL);
 470         if (parser == NULL) {
 471                 log_warnx("unable to create XML parser");
 472                 free(str);
 473                 return (NULL);
 474         }
 475
 476         XML_SetUserData(parser, &devlist);
 477         XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement);
 478         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 479
 480         retval = XML_Parse(parser, str, strlen(str), 1);
 481         XML_ParserFree(parser);
 482         free(str);
 483         if (retval != 1) {
 484                 log_warnx("XML_Parse failed");
 485                 return (NULL);
 486         }
 487
 488         conf = conf_new();
 489
 490         STAILQ_FOREACH(port, &devlist.port_list, links) {
 491
 492                 if (port->cfiscsi_target == NULL) {
 493                         log_debugx("CTL port %ju wasn't managed by ctld; "
 494                             "ignoring", (uintmax_t)port->port_id);
 495                         continue;
 496                 }
 497
 498                 targ = target_find(conf, port->cfiscsi_target);
 499                 if (targ == NULL) {
 500 #if 0
 501                         log_debugx("found new kernel target %s for CTL port %ld",
 502                             port->cfiscsi_target, port->port_id);
 503 #endif
 504                         targ = target_new(conf, port->cfiscsi_target);
 505                         if (targ == NULL) {
 506                                 log_warnx("target_new failed");
 507                                 continue;
 508                         }
 509                 }
 510         }
 511
 512         STAILQ_FOREACH(lun, &devlist.lun_list, links) {
 513                 struct cctl_lun_nv *nv;
 514
 515                 if (lun->cfiscsi_target == NULL) {
 516                         log_debugx("CTL lun %ju wasn't managed by ctld; "
 517                             "ignoring", (uintmax_t)lun->lun_id);
 518                         continue;
 519                 }
 520
 521                 targ = target_find(conf, lun->cfiscsi_target);
 522                 if (targ == NULL) {
 523 #if 0
 524                         log_debugx("found new kernel target %s for CTL lun %ld",
 525                             lun->cfiscsi_target, lun->lun_id);
 526 #endif
 527                         targ = target_new(conf, lun->cfiscsi_target);
 528                         if (targ == NULL) {
 529                                 log_warnx("target_new failed");
 530                                 continue;
 531                         }
 532                 }
 533
 534                 cl = lun_find(targ, lun->cfiscsi_lun);
 535                 if (cl != NULL) {
 536                         log_warnx("found CTL lun %ju, backing lun %d, target "
 537                             "%s, also backed by CTL lun %d; ignoring",
 538                             (uintmax_t) lun->lun_id, cl->l_lun,
 539                             cl->l_target->t_name, cl->l_ctl_lun);
 540                         continue;
 541                 }
 542
 543                 log_debugx("found CTL lun %ju, backing lun %d, target %s",
 544                     (uintmax_t)lun->lun_id, lun->cfiscsi_lun, lun->cfiscsi_target);
 545
 546                 cl = lun_new(targ, lun->cfiscsi_lun);
 547                 if (cl == NULL) {
 548                         log_warnx("lun_new failed");
 549                         continue;
 550                 }
 551                 lun_set_backend(cl, lun->backend_type);
 552                 lun_set_blocksize(cl, lun->blocksize);
 553                 lun_set_device_id(cl, lun->device_id);
 554                 lun_set_serial(cl, lun->serial_number);
 555                 lun_set_size(cl, lun->size_blocks * cl->l_blocksize);
 556                 lun_set_ctl_lun(cl, lun->lun_id);
 557
 558                 STAILQ_FOREACH(nv, &lun->attr_list, links) {
 559                         if (strcmp(nv->name, "file") == 0 ||
 560                             strcmp(nv->name, "dev") == 0) {
 561                                 lun_set_path(cl, nv->value);
 562                                 continue;
 563                         }
 564                         lo = lun_option_new(cl, nv->name, nv->value);
 565                         if (lo == NULL)
 566                                 log_warnx("unable to add CTL lun option %s "
 567                                     "for CTL lun %ju for lun %d, target %s",
 568                                     nv->name, (uintmax_t) lun->lun_id,
 569                                     cl->l_lun, cl->l_target->t_name);
 570                 }
 571         }
 572
 573         return (conf);
 574 }
 575
 576 static void
 577 str_arg(struct ctl_be_arg *arg, const char *name, const char *value)
 578 {
 579
 580         arg->namelen = strlen(name) + 1;
 581         arg->name = __DECONST(char *, name);
 582         arg->vallen = strlen(value) + 1;
 583         arg->value = __DECONST(char *, value);
 584         arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD;
 585 }
 586
 587 int
 588 kernel_lun_add(struct lun *lun)
 589 {
 590         struct lun_option *lo;
 591         struct ctl_lun_req req;
 592         char *tmp;
 593         int error, i, num_options;
 594
 595         bzero(&req, sizeof(req));
 596
 597         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 598         req.reqtype = CTL_LUNREQ_CREATE;
 599
 600         req.reqdata.create.blocksize_bytes = lun->l_blocksize;
 601
 602         if (lun->l_size != 0)
 603                 req.reqdata.create.lun_size_bytes = lun->l_size;
 604
 605         req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE;
 606         req.reqdata.create.device_type = T_DIRECT;
 607
 608         if (lun->l_serial != NULL) {
 609                 strncpy(req.reqdata.create.serial_num, lun->l_serial,
 610                         sizeof(req.reqdata.create.serial_num));
 611                 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM;
 612         }
 613
 614         if (lun->l_device_id != NULL) {
 615                 strncpy(req.reqdata.create.device_id, lun->l_device_id,
 616                         sizeof(req.reqdata.create.device_id));
 617                 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID;
 618         }
 619
 620         if (lun->l_path != NULL) {
 621                 lo = lun_option_find(lun, "file");
 622                 if (lo != NULL) {
 623                         lun_option_set(lo, lun->l_path);
 624                 } else {
 625                         lo = lun_option_new(lun, "file", lun->l_path);
 626                         assert(lo != NULL);
 627                 }
 628         }
 629
 630         lo = lun_option_find(lun, "cfiscsi_target");
 631         if (lo != NULL) {
 632                 lun_option_set(lo, lun->l_target->t_name);
 633         } else {
 634                 lo = lun_option_new(lun, "cfiscsi_target",
 635                     lun->l_target->t_name);
 636                 assert(lo != NULL);
 637         }
 638
 639         asprintf(&tmp, "%d", lun->l_lun);
 640         if (tmp == NULL)
 641                 log_errx(1, "asprintf");
 642         lo = lun_option_find(lun, "cfiscsi_lun");
 643         if (lo != NULL) {
 644                 lun_option_set(lo, tmp);
 645                 free(tmp);
 646         } else {
 647                 lo = lun_option_new(lun, "cfiscsi_lun", tmp);
 648                 free(tmp);
 649                 assert(lo != NULL);
 650         }
 651
 652         asprintf(&tmp, "%s,lun,%d", lun->l_target->t_name, lun->l_lun);
 653         if (tmp == NULL)
 654                 log_errx(1, "asprintf");
 655         lo = lun_option_find(lun, "scsiname");
 656         if (lo != NULL) {
 657                 lun_option_set(lo, tmp);
 658                 free(tmp);
 659         } else {
 660                 lo = lun_option_new(lun, "scsiname", tmp);
 661                 free(tmp);
 662                 assert(lo != NULL);
 663         }
 664
 665         num_options = 0;
 666         TAILQ_FOREACH(lo, &lun->l_options, lo_next)
 667                 num_options++;
 668
 669         req.num_be_args = num_options;
 670         if (num_options > 0) {
 671                 req.be_args = malloc(num_options * sizeof(*req.be_args));
 672                 if (req.be_args == NULL) {
 673                         log_warn("error allocating %zd bytes",
 674                             num_options * sizeof(*req.be_args));
 675                         return (1);
 676                 }
 677
 678                 i = 0;
 679                 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
 680                         str_arg(&req.be_args[i], lo->lo_name, lo->lo_value);
 681                         i++;
 682                 }
 683                 assert(i == num_options);
 684         }
 685
 686         error = ioctl(ctl_fd, CTL_LUN_REQ, &req);
 687         free(req.be_args);
 688         if (error != 0) {
 689                 log_warn("error issuing CTL_LUN_REQ ioctl");
 690                 return (1);
 691         }
 692
 693         if (req.status == CTL_LUN_ERROR) {
 694                 log_warnx("error returned from LUN creation request: %s",
 695                     req.error_str);
 696                 return (1);
 697         }
 698
 699         if (req.status != CTL_LUN_OK) {
 700                 log_warnx("unknown LUN creation request status %d",
 701                     req.status);
 702                 return (1);
 703         }
 704
 705         lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id);
 706
 707         return (0);
 708 }
 709
 710 int
 711 kernel_lun_resize(struct lun *lun)
 712 {
 713         struct ctl_lun_req req;
 714
 715         bzero(&req, sizeof(req));
 716
 717         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 718         req.reqtype = CTL_LUNREQ_MODIFY;
 719
 720         req.reqdata.modify.lun_id = lun->l_ctl_lun;
 721         req.reqdata.modify.lun_size_bytes = lun->l_size;
 722
 723         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 724                 log_warn("error issuing CTL_LUN_REQ ioctl");
 725                 return (1);
 726         }
 727
 728         if (req.status == CTL_LUN_ERROR) {
 729                 log_warnx("error returned from LUN modification request: %s",
 730                     req.error_str);
 731                 return (1);
 732         }
 733
 734         if (req.status != CTL_LUN_OK) {
 735                 log_warnx("unknown LUN modification request status %d",
 736                     req.status);
 737                 return (1);
 738         }
 739
 740         return (0);
 741 }
 742
 743 int
 744 kernel_lun_remove(struct lun *lun)
 745 {
 746         struct ctl_lun_req req;
 747
 748         bzero(&req, sizeof(req));
 749
 750         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 751         req.reqtype = CTL_LUNREQ_RM;
 752
 753         req.reqdata.rm.lun_id = lun->l_ctl_lun;
 754
 755         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 756                 log_warn("error issuing CTL_LUN_REQ ioctl");
 757                 return (1);
 758         }
 759
 760         if (req.status == CTL_LUN_ERROR) {
 761                 log_warnx("error returned from LUN removal request: %s",
 762                     req.error_str);
 763                 return (1);
 764         }
 765
 766         if (req.status != CTL_LUN_OK) {
 767                 log_warnx("unknown LUN removal request status %d", req.status);
 768                 return (1);
 769         }
 770
 771         return (0);
 772 }
 773
 774 void
 775 kernel_handoff(struct connection *conn)
 776 {
 777         struct ctl_iscsi req;
 778
 779         bzero(&req, sizeof(req));
 780
 781         req.type = CTL_ISCSI_HANDOFF;
 782         strlcpy(req.data.handoff.initiator_name,
 783             conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name));
 784         strlcpy(req.data.handoff.initiator_addr,
 785             conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr));
 786         if (conn->conn_initiator_alias != NULL) {
 787                 strlcpy(req.data.handoff.initiator_alias,
 788                     conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias));
 789         }
 790         strlcpy(req.data.handoff.target_name,
 791             conn->conn_target->t_name, sizeof(req.data.handoff.target_name));
 792 #ifdef ICL_KERNEL_PROXY
 793         if (proxy_mode)
 794                 req.data.handoff.connection_id = conn->conn_socket;
 795         else
 796                 req.data.handoff.socket = conn->conn_socket;
 797 #else
 798         req.data.handoff.socket = conn->conn_socket;
 799 #endif
 800         req.data.handoff.portal_group_tag =
 801             conn->conn_portal->p_portal_group->pg_tag;
 802         if (conn->conn_header_digest == CONN_DIGEST_CRC32C)
 803                 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C;
 804         if (conn->conn_data_digest == CONN_DIGEST_CRC32C)
 805                 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C;
 806         req.data.handoff.cmdsn = conn->conn_cmdsn;
 807         req.data.handoff.statsn = conn->conn_statsn;
 808         req.data.handoff.max_recv_data_segment_length =
 809             conn->conn_max_data_segment_length;
 810         req.data.handoff.max_burst_length = conn->conn_max_burst_length;
 811         req.data.handoff.immediate_data = conn->conn_immediate_data;
 812
 813         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 814                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 815                     "dropping connection");
 816         }
 817
 818         if (req.status != CTL_ISCSI_OK) {
 819                 log_errx(1, "error returned from CTL iSCSI handoff request: "
 820                     "%s; dropping connection", req.error_str);
 821         }
 822 }
 823
 824 int
 825 kernel_port_add(struct target *targ)
 826 {
 827         struct ctl_port_entry entry;
 828         struct ctl_req req;
 829         char tagstr[16];
 830         int error;
 831         uint32_t port_id = -1;
 832
 833         bzero(&req, sizeof(req));
 834         strlcpy(req.driver, "iscsi", sizeof(req.driver));
 835         req.reqtype = CTL_REQ_CREATE;
 836         req.num_args = 4;
 837         req.args = malloc(req.num_args * sizeof(*req.args));
 838         req.args[0].namelen = sizeof("port_id");
 839         req.args[0].name = __DECONST(char *, "port_id");
 840         req.args[0].vallen = sizeof(port_id);
 841         req.args[0].value = &port_id;
 842         req.args[0].flags = CTL_BEARG_WR;
 843         str_arg(&req.args[1], "cfiscsi_target", targ->t_name);
 844         str_arg(&req.args[2], "cfiscsi_target_alias", targ->t_alias);
 845         snprintf(tagstr, sizeof(tagstr), "%d", targ->t_portal_group->pg_tag);
 846         str_arg(&req.args[3], "cfiscsi_portal_group_tag", tagstr);
 847
 848         error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
 849         free(req.args);
 850         if (error != 0) {
 851                 log_warn("error issuing CTL_PORT_REQ ioctl");
 852                 return (1);
 853         }
 854
 855         if (req.status == CTL_LUN_ERROR) {
 856                 log_warnx("error returned from port creation request: %s",
 857                     req.error_str);
 858                 return (1);
 859         }
 860
 861         if (req.status != CTL_LUN_OK) {
 862                 log_warnx("unknown port creation request status %d",
 863                     req.status);
 864                 return (1);
 865         }
 866
 867         bzero(&entry, sizeof(entry));
 868         entry.targ_port = port_id;
 869
 870         error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry);
 871         if (error != 0) {
 872                 log_warn("CTL_ENABLE_PORT ioctl failed");
 873                 return (-1);
 874         }
 875
 876         return (0);
 877 }
 878
 879 int
 880 kernel_port_remove(struct target *targ)
 881 {
 882         struct ctl_req req;
 883         char tagstr[16];
 884         int error;
 885
 886         bzero(&req, sizeof(req));
 887         strlcpy(req.driver, "iscsi", sizeof(req.driver));
 888         req.reqtype = CTL_REQ_REMOVE;
 889         req.num_args = 2;
 890         req.args = malloc(req.num_args * sizeof(*req.args));
 891         str_arg(&req.args[0], "cfiscsi_target", targ->t_name);
 892         if (targ->t_portal_group) {
 893                 snprintf(tagstr, sizeof(tagstr), "%d",
 894                     targ->t_portal_group->pg_tag);
 895                 str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr);
 896         } else
 897                 req.num_args--;
 898
 899         error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
 900         free(req.args);
 901         if (error != 0) {
 902                 log_warn("error issuing CTL_PORT_REQ ioctl");
 903                 return (1);
 904         }
 905
 906         if (req.status == CTL_LUN_ERROR) {
 907                 log_warnx("error returned from port removal request: %s",
 908                     req.error_str);
 909                 return (1);
 910         }
 911
 912         if (req.status != CTL_LUN_OK) {
 913                 log_warnx("unknown port removal request status %d",
 914                     req.status);
 915                 return (1);
 916         }
 917
 918         return (0);
 919 }
 920
 921 #ifdef ICL_KERNEL_PROXY
 922 void
 923 kernel_listen(struct addrinfo *ai, bool iser, int portal_id)
 924 {
 925         struct ctl_iscsi req;
 926
 927         bzero(&req, sizeof(req));
 928
 929         req.type = CTL_ISCSI_LISTEN;
 930         req.data.listen.iser = iser;
 931         req.data.listen.domain = ai->ai_family;
 932         req.data.listen.socktype = ai->ai_socktype;
 933         req.data.listen.protocol = ai->ai_protocol;
 934         req.data.listen.addr = ai->ai_addr;
 935         req.data.listen.addrlen = ai->ai_addrlen;
 936         req.data.listen.portal_id = portal_id;
 937
 938         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
 939                 log_err(1, "error issuing CTL_ISCSI ioctl");
 940
 941         if (req.status != CTL_ISCSI_OK) {
 942                 log_errx(1, "error returned from CTL iSCSI listen: %s",
 943                     req.error_str);
 944         }
 945 }
 946
 947 void
 948 kernel_accept(int *connection_id, int *portal_id,
 949     struct sockaddr *client_sa, socklen_t *client_salen)
 950 {
 951         struct ctl_iscsi req;
 952         struct sockaddr_storage ss;
 953
 954         bzero(&req, sizeof(req));
 955
 956         req.type = CTL_ISCSI_ACCEPT;
 957         req.data.accept.initiator_addr = (struct sockaddr *)&ss;
 958
 959         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
 960                 log_err(1, "error issuing CTL_ISCSI ioctl");
 961
 962         if (req.status != CTL_ISCSI_OK) {
 963                 log_errx(1, "error returned from CTL iSCSI accept: %s",
 964                     req.error_str);
 965         }
 966
 967         *connection_id = req.data.accept.connection_id;
 968         *portal_id = req.data.accept.portal_id;
 969         *client_salen = req.data.accept.initiator_addrlen;
 970         memcpy(client_sa, &ss, *client_salen);
 971 }
 972
 973 void
 974 kernel_send(struct pdu *pdu)
 975 {
 976         struct ctl_iscsi req;
 977
 978         bzero(&req, sizeof(req));
 979
 980         req.type = CTL_ISCSI_SEND;
 981         req.data.send.connection_id = pdu->pdu_connection->conn_socket;
 982         req.data.send.bhs = pdu->pdu_bhs;
 983         req.data.send.data_segment_len = pdu->pdu_data_len;
 984         req.data.send.data_segment = pdu->pdu_data;
 985
 986         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 987                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 988                     "dropping connection");
 989         }
 990
 991         if (req.status != CTL_ISCSI_OK) {
 992                 log_errx(1, "error returned from CTL iSCSI send: "
 993                     "%s; dropping connection", req.error_str);
 994         }
 995 }
 996
 997 void
 998 kernel_receive(struct pdu *pdu)
 999 {
1000         struct ctl_iscsi req;
1001
1002         pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH);
1003         if (pdu->pdu_data == NULL)
1004                 log_err(1, "malloc");
1005
1006         bzero(&req, sizeof(req));
1007
1008         req.type = CTL_ISCSI_RECEIVE;
1009         req.data.receive.connection_id = pdu->pdu_connection->conn_socket;
1010         req.data.receive.bhs = pdu->pdu_bhs;
1011         req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH;
1012         req.data.receive.data_segment = pdu->pdu_data;
1013
1014         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1015                 log_err(1, "error issuing CTL_ISCSI ioctl; "
1016                     "dropping connection");
1017         }
1018
1019         if (req.status != CTL_ISCSI_OK) {
1020                 log_errx(1, "error returned from CTL iSCSI receive: "
1021                     "%s; dropping connection", req.error_str);
1022         }
1023
1024 }
1025
1026 #endif /* ICL_KERNEL_PROXY */
1027
1028 /*
1029  * XXX: I CANT INTO LATIN
1030  */
1031 void
1032 kernel_capsicate(void)
1033 {
1034         int error;
1035         cap_rights_t rights;
1036         const unsigned long cmds[] = { CTL_ISCSI };
1037
1038         cap_rights_init(&rights, CAP_IOCTL);
1039         error = cap_rights_limit(ctl_fd, &rights);
1040         if (error != 0 && errno != ENOSYS)
1041                 log_err(1, "cap_rights_limit");
1042
1043         error = cap_ioctls_limit(ctl_fd, cmds,
1044             sizeof(cmds) / sizeof(cmds[0]));
1045         if (error != 0 && errno != ENOSYS)
1046                 log_err(1, "cap_ioctls_limit");
1047
1048         error = cap_enter();
1049         if (error != 0 && errno != ENOSYS)
1050                 log_err(1, "cap_enter");
1051
1052         if (cap_sandboxed())
1053                 log_debugx("Capsicum capability mode enabled");
1054         else
1055                 log_warnx("Capsicum capability mode not supported");
1056 }
1057