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         char *cfiscsi_target_alias;
 117         int cfiscsi_lun;
 118         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 119         STAILQ_ENTRY(cctl_lun) links;
 120 };
 121
 122 struct cctl_devlist_data {
 123         int num_luns;
 124         STAILQ_HEAD(,cctl_lun) lun_list;
 125         struct cctl_lun *cur_lun;
 126         int level;
 127         struct sbuf *cur_sb[32];
 128 };
 129
 130 static void
 131 cctl_start_element(void *user_data, const char *name, const char **attr)
 132 {
 133         int i;
 134         struct cctl_devlist_data *devlist;
 135         struct cctl_lun *cur_lun;
 136
 137         devlist = (struct cctl_devlist_data *)user_data;
 138         cur_lun = devlist->cur_lun;
 139         devlist->level++;
 140         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 141             sizeof(devlist->cur_sb[0])))
 142                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 143                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 144
 145         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 146         if (devlist->cur_sb[devlist->level] == NULL)
 147                 log_err(1, "%s: unable to allocate sbuf", __func__);
 148
 149         if (strcmp(name, "lun") == 0) {
 150                 if (cur_lun != NULL)
 151                         log_errx(1, "%s: improper lun element nesting",
 152                             __func__);
 153
 154                 cur_lun = calloc(1, sizeof(*cur_lun));
 155                 if (cur_lun == NULL)
 156                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 157                             sizeof(*cur_lun));
 158
 159                 devlist->num_luns++;
 160                 devlist->cur_lun = cur_lun;
 161
 162                 STAILQ_INIT(&cur_lun->attr_list);
 163                 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links);
 164
 165                 for (i = 0; attr[i] != NULL; i += 2) {
 166                         if (strcmp(attr[i], "id") == 0) {
 167                                 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0);
 168                         } else {
 169                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 170                                      __func__, attr[i], attr[i+1]);
 171                         }
 172                 }
 173         }
 174 }
 175
 176 static void
 177 cctl_end_element(void *user_data, const char *name)
 178 {
 179         struct cctl_devlist_data *devlist;
 180         struct cctl_lun *cur_lun;
 181         char *str;
 182
 183         devlist = (struct cctl_devlist_data *)user_data;
 184         cur_lun = devlist->cur_lun;
 185
 186         if ((cur_lun == NULL)
 187          && (strcmp(name, "ctllunlist") != 0))
 188                 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name);
 189
 190         if (devlist->cur_sb[devlist->level] == NULL)
 191                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 192                      devlist->level, name);
 193
 194         sbuf_finish(devlist->cur_sb[devlist->level]);
 195         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 196
 197         if (strlen(str) == 0) {
 198                 free(str);
 199                 str = NULL;
 200         }
 201
 202         sbuf_delete(devlist->cur_sb[devlist->level]);
 203         devlist->cur_sb[devlist->level] = NULL;
 204         devlist->level--;
 205
 206         if (strcmp(name, "backend_type") == 0) {
 207                 cur_lun->backend_type = str;
 208                 str = NULL;
 209         } else if (strcmp(name, "size") == 0) {
 210                 cur_lun->size_blocks = strtoull(str, NULL, 0);
 211         } else if (strcmp(name, "blocksize") == 0) {
 212                 cur_lun->blocksize = strtoul(str, NULL, 0);
 213         } else if (strcmp(name, "serial_number") == 0) {
 214                 cur_lun->serial_number = str;
 215                 str = NULL;
 216         } else if (strcmp(name, "device_id") == 0) {
 217                 cur_lun->device_id = str;
 218                 str = NULL;
 219         } else if (strcmp(name, "cfiscsi_target") == 0) {
 220                 cur_lun->cfiscsi_target = str;
 221                 str = NULL;
 222         } else if (strcmp(name, "cfiscsi_target_alias") == 0) {
 223                 cur_lun->cfiscsi_target_alias = str;
 224                 str = NULL;
 225         } else if (strcmp(name, "cfiscsi_lun") == 0) {
 226                 cur_lun->cfiscsi_lun = strtoul(str, NULL, 0);
 227         } else if (strcmp(name, "lun") == 0) {
 228                 devlist->cur_lun = NULL;
 229         } else if (strcmp(name, "ctllunlist") == 0) {
 230
 231         } else {
 232                 struct cctl_lun_nv *nv;
 233
 234                 nv = calloc(1, sizeof(*nv));
 235                 if (nv == NULL)
 236                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 237                             __func__, sizeof(*nv));
 238
 239                 nv->name = checked_strdup(name);
 240
 241                 nv->value = str;
 242                 str = NULL;
 243                 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links);
 244         }
 245
 246         free(str);
 247 }
 248
 249 static void
 250 cctl_char_handler(void *user_data, const XML_Char *str, int len)
 251 {
 252         struct cctl_devlist_data *devlist;
 253
 254         devlist = (struct cctl_devlist_data *)user_data;
 255
 256         sbuf_bcat(devlist->cur_sb[devlist->level], str, len);
 257 }
 258
 259 struct conf *
 260 conf_new_from_kernel(void)
 261 {
 262         struct conf *conf = NULL;
 263         struct target *targ;
 264         struct lun *cl;
 265         struct lun_option *lo;
 266         struct ctl_lun_list list;
 267         struct cctl_devlist_data devlist;
 268         struct cctl_lun *lun;
 269         XML_Parser parser;
 270         char *lun_str = NULL;
 271         int lun_len;
 272         int retval;
 273
 274         lun_len = 4096;
 275
 276         bzero(&devlist, sizeof(devlist));
 277         STAILQ_INIT(&devlist.lun_list);
 278
 279         log_debugx("obtaining previously configured CTL luns from the kernel");
 280
 281 retry:
 282         lun_str = realloc(lun_str, lun_len);
 283         if (lun_str == NULL)
 284                 log_err(1, "realloc");
 285
 286         bzero(&list, sizeof(list));
 287         list.alloc_len = lun_len;
 288         list.status = CTL_LUN_LIST_NONE;
 289         list.lun_xml = lun_str;
 290
 291         if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) {
 292                 log_warn("error issuing CTL_LUN_LIST ioctl");
 293                 free(lun_str);
 294                 return (NULL);
 295         }
 296
 297         if (list.status == CTL_LUN_LIST_ERROR) {
 298                 log_warnx("error returned from CTL_LUN_LIST ioctl: %s",
 299                     list.error_str);
 300                 free(lun_str);
 301                 return (NULL);
 302         }
 303
 304         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 305                 lun_len = lun_len << 1;
 306                 goto retry;
 307         }
 308
 309         parser = XML_ParserCreate(NULL);
 310         if (parser == NULL) {
 311                 log_warnx("unable to create XML parser");
 312                 free(lun_str);
 313                 return (NULL);
 314         }
 315
 316         XML_SetUserData(parser, &devlist);
 317         XML_SetElementHandler(parser, cctl_start_element, cctl_end_element);
 318         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 319
 320         retval = XML_Parse(parser, lun_str, strlen(lun_str), 1);
 321         XML_ParserFree(parser);
 322         free(lun_str);
 323         if (retval != 1) {
 324                 log_warnx("XML_Parse failed");
 325                 return (NULL);
 326         }
 327
 328         conf = conf_new();
 329
 330         STAILQ_FOREACH(lun, &devlist.lun_list, links) {
 331                 struct cctl_lun_nv *nv;
 332
 333                 if (lun->cfiscsi_target == NULL) {
 334                         log_debugx("CTL lun %ju wasn't managed by ctld; "
 335                             "ignoring", (uintmax_t)lun->lun_id);
 336                         continue;
 337                 }
 338
 339                 targ = target_find(conf, lun->cfiscsi_target);
 340                 if (targ == NULL) {
 341 #if 0
 342                         log_debugx("found new kernel target %s for CTL lun %ld",
 343                             lun->cfiscsi_target, lun->lun_id);
 344 #endif
 345                         targ = target_new(conf, lun->cfiscsi_target);
 346                         if (targ == NULL) {
 347                                 log_warnx("target_new failed");
 348                                 continue;
 349                         }
 350                 }
 351
 352                 cl = lun_find(targ, lun->cfiscsi_lun);
 353                 if (cl != NULL) {
 354                         log_warnx("found CTL lun %ju, backing lun %d, target "
 355                             "%s, also backed by CTL lun %d; ignoring",
 356                             (uintmax_t) lun->lun_id, cl->l_lun,
 357                             cl->l_target->t_name, cl->l_ctl_lun);
 358                         continue;
 359                 }
 360
 361                 log_debugx("found CTL lun %ju, backing lun %d, target %s",
 362                     (uintmax_t)lun->lun_id, lun->cfiscsi_lun, lun->cfiscsi_target);
 363
 364                 cl = lun_new(targ, lun->cfiscsi_lun);
 365                 if (cl == NULL) {
 366                         log_warnx("lun_new failed");
 367                         continue;
 368                 }
 369                 lun_set_backend(cl, lun->backend_type);
 370                 lun_set_blocksize(cl, lun->blocksize);
 371                 lun_set_device_id(cl, lun->device_id);
 372                 lun_set_serial(cl, lun->serial_number);
 373                 lun_set_size(cl, lun->size_blocks * cl->l_blocksize);
 374                 lun_set_ctl_lun(cl, lun->lun_id);
 375
 376                 STAILQ_FOREACH(nv, &lun->attr_list, links) {
 377                         if (strcmp(nv->name, "file") == 0 ||
 378                             strcmp(nv->name, "dev") == 0) {
 379                                 lun_set_path(cl, nv->value);
 380                                 continue;
 381                         }
 382                         lo = lun_option_new(cl, nv->name, nv->value);
 383                         if (lo == NULL)
 384                                 log_warnx("unable to add CTL lun option %s "
 385                                     "for CTL lun %ju for lun %d, target %s",
 386                                     nv->name, (uintmax_t) lun->lun_id,
 387                                     cl->l_lun, cl->l_target->t_name);
 388                 }
 389         }
 390
 391         return (conf);
 392 }
 393
 394 int
 395 kernel_lun_add(struct lun *lun)
 396 {
 397         struct lun_option *lo;
 398         struct ctl_lun_req req;
 399         char *tmp;
 400         int error, i, num_options;
 401
 402         bzero(&req, sizeof(req));
 403
 404         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 405         req.reqtype = CTL_LUNREQ_CREATE;
 406
 407         req.reqdata.create.blocksize_bytes = lun->l_blocksize;
 408
 409         if (lun->l_size != 0)
 410                 req.reqdata.create.lun_size_bytes = lun->l_size;
 411
 412         req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE;
 413         req.reqdata.create.device_type = T_DIRECT;
 414
 415         if (lun->l_serial != NULL) {
 416                 strlcpy(req.reqdata.create.serial_num, lun->l_serial,
 417                         sizeof(req.reqdata.create.serial_num));
 418                 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM;
 419         }
 420
 421         if (lun->l_device_id != NULL) {
 422                 strlcpy(req.reqdata.create.device_id, lun->l_device_id,
 423                         sizeof(req.reqdata.create.device_id));
 424                 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID;
 425         }
 426
 427         if (lun->l_path != NULL) {
 428                 lo = lun_option_find(lun, "file");
 429                 if (lo != NULL) {
 430                         lun_option_set(lo, lun->l_path);
 431                 } else {
 432                         lo = lun_option_new(lun, "file", lun->l_path);
 433                         assert(lo != NULL);
 434                 }
 435         }
 436
 437         lo = lun_option_find(lun, "cfiscsi_target");
 438         if (lo != NULL) {
 439                 lun_option_set(lo, lun->l_target->t_name);
 440         } else {
 441                 lo = lun_option_new(lun, "cfiscsi_target",
 442                     lun->l_target->t_name);
 443                 assert(lo != NULL);
 444         }
 445
 446         if (lun->l_target->t_alias != NULL) {
 447                 lo = lun_option_find(lun, "cfiscsi_target_alias");
 448                 if (lo != NULL) {
 449                         lun_option_set(lo, lun->l_target->t_alias);
 450                 } else {
 451                         lo = lun_option_new(lun, "cfiscsi_target_alias",
 452                             lun->l_target->t_alias);
 453                         assert(lo != NULL);
 454                 }
 455         }
 456
 457         asprintf(&tmp, "%d", lun->l_lun);
 458         if (tmp == NULL)
 459                 log_errx(1, "asprintf");
 460         lo = lun_option_find(lun, "cfiscsi_lun");
 461         if (lo != NULL) {
 462                 lun_option_set(lo, tmp);
 463                 free(tmp);
 464         } else {
 465                 lo = lun_option_new(lun, "cfiscsi_lun", tmp);
 466                 free(tmp);
 467                 assert(lo != NULL);
 468         }
 469
 470         num_options = 0;
 471         TAILQ_FOREACH(lo, &lun->l_options, lo_next)
 472                 num_options++;
 473
 474         req.num_be_args = num_options;
 475         if (num_options > 0) {
 476                 req.be_args = malloc(num_options * sizeof(*req.be_args));
 477                 if (req.be_args == NULL) {
 478                         log_warn("error allocating %zd bytes",
 479                             num_options * sizeof(*req.be_args));
 480                         return (1);
 481                 }
 482
 483                 i = 0;
 484                 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
 485                          /*
 486                           * +1 for the terminating '\0'
 487                           */
 488                         req.be_args[i].namelen = strlen(lo->lo_name) + 1;
 489                         req.be_args[i].name = lo->lo_name;
 490                         req.be_args[i].vallen = strlen(lo->lo_value) + 1;
 491                         req.be_args[i].value = lo->lo_value;
 492                         req.be_args[i].flags = CTL_BEARG_ASCII | CTL_BEARG_RD;
 493                         i++;
 494                 }
 495                 assert(i == num_options);
 496         }
 497
 498         error = ioctl(ctl_fd, CTL_LUN_REQ, &req);
 499         free(req.be_args);
 500         if (error != 0) {
 501                 log_warn("error issuing CTL_LUN_REQ ioctl");
 502                 return (1);
 503         }
 504
 505         if (req.status == CTL_LUN_ERROR) {
 506                 log_warnx("error returned from LUN creation request: %s",
 507                     req.error_str);
 508                 return (1);
 509         }
 510
 511         if (req.status != CTL_LUN_OK) {
 512                 log_warnx("unknown LUN creation request status %d",
 513                     req.status);
 514                 return (1);
 515         }
 516
 517         lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id);
 518
 519         return (0);
 520 }
 521
 522 int
 523 kernel_lun_resize(struct lun *lun)
 524 {
 525         struct ctl_lun_req req;
 526
 527         bzero(&req, sizeof(req));
 528
 529         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 530         req.reqtype = CTL_LUNREQ_MODIFY;
 531
 532         req.reqdata.modify.lun_id = lun->l_ctl_lun;
 533         req.reqdata.modify.lun_size_bytes = lun->l_size;
 534
 535         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 536                 log_warn("error issuing CTL_LUN_REQ ioctl");
 537                 return (1);
 538         }
 539
 540         if (req.status == CTL_LUN_ERROR) {
 541                 log_warnx("error returned from LUN modification request: %s",
 542                     req.error_str);
 543                 return (1);
 544         }
 545
 546         if (req.status != CTL_LUN_OK) {
 547                 log_warnx("unknown LUN modification request status %d",
 548                     req.status);
 549                 return (1);
 550         }
 551
 552         return (0);
 553 }
 554
 555 int
 556 kernel_lun_remove(struct lun *lun)
 557 {
 558         struct ctl_lun_req req;
 559
 560         bzero(&req, sizeof(req));
 561
 562         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 563         req.reqtype = CTL_LUNREQ_RM;
 564
 565         req.reqdata.rm.lun_id = lun->l_ctl_lun;
 566
 567         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 568                 log_warn("error issuing CTL_LUN_REQ ioctl");
 569                 return (1);
 570         }
 571
 572         if (req.status == CTL_LUN_ERROR) {
 573                 log_warnx("error returned from LUN removal request: %s",
 574                     req.error_str);
 575                 return (1);
 576         }
 577
 578         if (req.status != CTL_LUN_OK) {
 579                 log_warnx("unknown LUN removal request status %d", req.status);
 580                 return (1);
 581         }
 582
 583         return (0);
 584 }
 585
 586 void
 587 kernel_handoff(struct connection *conn)
 588 {
 589         struct ctl_iscsi req;
 590
 591         bzero(&req, sizeof(req));
 592
 593         req.type = CTL_ISCSI_HANDOFF;
 594         strlcpy(req.data.handoff.initiator_name,
 595             conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name));
 596         strlcpy(req.data.handoff.initiator_addr,
 597             conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr));
 598         if (conn->conn_initiator_alias != NULL) {
 599                 strlcpy(req.data.handoff.initiator_alias,
 600                     conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias));
 601         }
 602         strlcpy(req.data.handoff.target_name,
 603             conn->conn_target->t_name, sizeof(req.data.handoff.target_name));
 604 #ifdef ICL_KERNEL_PROXY
 605         if (proxy_mode)
 606                 req.data.handoff.connection_id = conn->conn_socket;
 607         else
 608                 req.data.handoff.socket = conn->conn_socket;
 609 #else
 610         req.data.handoff.socket = conn->conn_socket;
 611 #endif
 612         req.data.handoff.portal_group_tag =
 613             conn->conn_portal->p_portal_group->pg_tag;
 614         if (conn->conn_header_digest == CONN_DIGEST_CRC32C)
 615                 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C;
 616         if (conn->conn_data_digest == CONN_DIGEST_CRC32C)
 617                 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C;
 618         req.data.handoff.cmdsn = conn->conn_cmdsn;
 619         req.data.handoff.statsn = conn->conn_statsn;
 620         req.data.handoff.max_recv_data_segment_length =
 621             conn->conn_max_data_segment_length;
 622         req.data.handoff.max_burst_length = conn->conn_max_burst_length;
 623         req.data.handoff.immediate_data = conn->conn_immediate_data;
 624
 625         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 626                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 627                     "dropping connection");
 628         }
 629
 630         if (req.status != CTL_ISCSI_OK) {
 631                 log_errx(1, "error returned from CTL iSCSI handoff request: "
 632                     "%s; dropping connection", req.error_str);
 633         }
 634 }
 635
 636 int
 637 kernel_port_on(void)
 638 {
 639         struct ctl_port_entry entry;
 640         int error;
 641
 642         bzero(&entry, sizeof(entry));
 643
 644         entry.port_type = CTL_PORT_ISCSI;
 645         entry.targ_port = -1;
 646
 647         error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry);
 648         if (error != 0) {
 649                 log_warn("CTL_ENABLE_PORT ioctl failed");
 650                 return (-1);
 651         }
 652
 653         return (0);
 654 }
 655
 656 int
 657 kernel_port_off(void)
 658 {
 659         struct ctl_port_entry entry;
 660         int error;
 661
 662         bzero(&entry, sizeof(entry));
 663
 664         entry.port_type = CTL_PORT_ISCSI;
 665         entry.targ_port = -1;
 666
 667         error = ioctl(ctl_fd, CTL_DISABLE_PORT, &entry);
 668         if (error != 0) {
 669                 log_warn("CTL_DISABLE_PORT ioctl failed");
 670                 return (-1);
 671         }
 672
 673         return (0);
 674 }
 675
 676 #ifdef ICL_KERNEL_PROXY
 677 void
 678 kernel_listen(struct addrinfo *ai, bool iser, int portal_id)
 679 {
 680         struct ctl_iscsi req;
 681
 682         bzero(&req, sizeof(req));
 683
 684         req.type = CTL_ISCSI_LISTEN;
 685         req.data.listen.iser = iser;
 686         req.data.listen.domain = ai->ai_family;
 687         req.data.listen.socktype = ai->ai_socktype;
 688         req.data.listen.protocol = ai->ai_protocol;
 689         req.data.listen.addr = ai->ai_addr;
 690         req.data.listen.addrlen = ai->ai_addrlen;
 691         req.data.listen.portal_id = portal_id;
 692
 693         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
 694                 log_err(1, "error issuing CTL_ISCSI ioctl");
 695
 696         if (req.status != CTL_ISCSI_OK) {
 697                 log_errx(1, "error returned from CTL iSCSI listen: %s",
 698                     req.error_str);
 699         }
 700 }
 701
 702 void
 703 kernel_accept(int *connection_id, int *portal_id,
 704     struct sockaddr *client_sa, socklen_t *client_salen)
 705 {
 706         struct ctl_iscsi req;
 707         struct sockaddr_storage ss;
 708
 709         bzero(&req, sizeof(req));
 710
 711         req.type = CTL_ISCSI_ACCEPT;
 712         req.data.accept.initiator_addr = (struct sockaddr *)&ss;
 713
 714         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
 715                 log_err(1, "error issuing CTL_ISCSI ioctl");
 716
 717         if (req.status != CTL_ISCSI_OK) {
 718                 log_errx(1, "error returned from CTL iSCSI accept: %s",
 719                     req.error_str);
 720         }
 721
 722         *connection_id = req.data.accept.connection_id;
 723         *portal_id = req.data.accept.portal_id;
 724         *client_salen = req.data.accept.initiator_addrlen;
 725         memcpy(client_sa, &ss, *client_salen);
 726 }
 727
 728 void
 729 kernel_send(struct pdu *pdu)
 730 {
 731         struct ctl_iscsi req;
 732
 733         bzero(&req, sizeof(req));
 734
 735         req.type = CTL_ISCSI_SEND;
 736         req.data.send.connection_id = pdu->pdu_connection->conn_socket;
 737         req.data.send.bhs = pdu->pdu_bhs;
 738         req.data.send.data_segment_len = pdu->pdu_data_len;
 739         req.data.send.data_segment = pdu->pdu_data;
 740
 741         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 742                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 743                     "dropping connection");
 744         }
 745
 746         if (req.status != CTL_ISCSI_OK) {
 747                 log_errx(1, "error returned from CTL iSCSI send: "
 748                     "%s; dropping connection", req.error_str);
 749         }
 750 }
 751
 752 void
 753 kernel_receive(struct pdu *pdu)
 754 {
 755         struct ctl_iscsi req;
 756
 757         pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH);
 758         if (pdu->pdu_data == NULL)
 759                 log_err(1, "malloc");
 760
 761         bzero(&req, sizeof(req));
 762
 763         req.type = CTL_ISCSI_RECEIVE;
 764         req.data.receive.connection_id = pdu->pdu_connection->conn_socket;
 765         req.data.receive.bhs = pdu->pdu_bhs;
 766         req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH;
 767         req.data.receive.data_segment = pdu->pdu_data;
 768
 769         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 770                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 771                     "dropping connection");
 772         }
 773
 774         if (req.status != CTL_ISCSI_OK) {
 775                 log_errx(1, "error returned from CTL iSCSI receive: "
 776                     "%s; dropping connection", req.error_str);
 777         }
 778
 779 }
 780
 781 #endif /* ICL_KERNEL_PROXY */
 782
 783 /*
 784  * XXX: I CANT INTO LATIN
 785  */
 786 void
 787 kernel_capsicate(void)
 788 {
 789         int error;
 790         cap_rights_t rights;
 791         const unsigned long cmds[] = { CTL_ISCSI };
 792
 793         cap_rights_init(&rights, CAP_IOCTL);
 794         error = cap_rights_limit(ctl_fd, &rights);
 795         if (error != 0 && errno != ENOSYS)
 796                 log_err(1, "cap_rights_limit");
 797
 798         error = cap_ioctls_limit(ctl_fd, cmds,
 799             sizeof(cmds) / sizeof(cmds[0]));
 800         if (error != 0 && errno != ENOSYS)
 801                 log_err(1, "cap_ioctls_limit");
 802
 803         error = cap_enter();
 804         if (error != 0 && errno != ENOSYS)
 805                 log_err(1, "cap_enter");
 806
 807         if (cap_sandboxed())
 808                 log_debugx("Capsicum capability mode enabled");
 809         else
 810                 log_warnx("Capsicum capability mode not supported");
 811 }
 812