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  */
  36
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD$");
  39
  40 #include <sys/ioctl.h>
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include <sys/param.h>
  44 #include <sys/linker.h>
  45 #include <sys/queue.h>
  46 #include <sys/callout.h>
  47 #include <sys/sbuf.h>
  48 #include <sys/capability.h>
  49 #include <assert.h>
  50 #include <bsdxml.h>
  51 #include <ctype.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <stdint.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58 #include <strings.h>
  59 #include <cam/scsi/scsi_all.h>
  60 #include <cam/scsi/scsi_message.h>
  61 #include <cam/ctl/ctl.h>
  62 #include <cam/ctl/ctl_io.h>
  63 #include <cam/ctl/ctl_frontend_internal.h>
  64 #include <cam/ctl/ctl_backend.h>
  65 #include <cam/ctl/ctl_ioctl.h>
  66 #include <cam/ctl/ctl_backend_block.h>
  67 #include <cam/ctl/ctl_util.h>
  68 #include <cam/ctl/ctl_scsi_all.h>
  69
  70 #include "ctld.h"
  71
  72 #ifdef ICL_KERNEL_PROXY
  73 #include <netdb.h>
  74 #endif
  75
  76 extern bool proxy_mode;
  77
  78 static int      ctl_fd = 0;
  79
  80 void
  81 kernel_init(void)
  82 {
  83         int retval, saved_errno;
  84
  85         ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
  86         if (ctl_fd < 0 && errno == ENOENT) {
  87                 saved_errno = errno;
  88                 retval = kldload("ctl");
  89                 if (retval != -1)
  90                         ctl_fd = open(CTL_DEFAULT_DEV, O_RDWR);
  91                 else
  92                         errno = saved_errno;
  93         }
  94         if (ctl_fd < 0)
  95                 log_err(1, "failed to open %s", CTL_DEFAULT_DEV);
  96 }
  97
  98 /*
  99  * Name/value pair used for per-LUN attributes.
 100  */
 101 struct cctl_lun_nv {
 102         char *name;
 103         char *value;
 104         STAILQ_ENTRY(cctl_lun_nv) links;
 105 };
 106
 107 /*
 108  * Backend LUN information.
 109  */
 110 struct cctl_lun {
 111         uint64_t lun_id;
 112         char *backend_type;
 113         uint64_t size_blocks;
 114         uint32_t blocksize;
 115         char *serial_number;
 116         char *device_id;
 117         char *ctld_name;
 118         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 119         STAILQ_ENTRY(cctl_lun) links;
 120 };
 121
 122 struct cctl_port {
 123         uint32_t port_id;
 124         int cfiscsi_state;
 125         char *cfiscsi_target;
 126         uint16_t cfiscsi_portal_group_tag;
 127         char *ctld_portal_group_name;
 128         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 129         STAILQ_ENTRY(cctl_port) links;
 130 };
 131
 132 struct cctl_devlist_data {
 133         int num_luns;
 134         STAILQ_HEAD(,cctl_lun) lun_list;
 135         struct cctl_lun *cur_lun;
 136         int num_ports;
 137         STAILQ_HEAD(,cctl_port) port_list;
 138         struct cctl_port *cur_port;
 139         int level;
 140         struct sbuf *cur_sb[32];
 141 };
 142
 143 static void
 144 cctl_start_element(void *user_data, const char *name, const char **attr)
 145 {
 146         int i;
 147         struct cctl_devlist_data *devlist;
 148         struct cctl_lun *cur_lun;
 149
 150         devlist = (struct cctl_devlist_data *)user_data;
 151         cur_lun = devlist->cur_lun;
 152         devlist->level++;
 153         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 154             sizeof(devlist->cur_sb[0])))
 155                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 156                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 157
 158         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 159         if (devlist->cur_sb[devlist->level] == NULL)
 160                 log_err(1, "%s: unable to allocate sbuf", __func__);
 161
 162         if (strcmp(name, "lun") == 0) {
 163                 if (cur_lun != NULL)
 164                         log_errx(1, "%s: improper lun element nesting",
 165                             __func__);
 166
 167                 cur_lun = calloc(1, sizeof(*cur_lun));
 168                 if (cur_lun == NULL)
 169                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 170                             sizeof(*cur_lun));
 171
 172                 devlist->num_luns++;
 173                 devlist->cur_lun = cur_lun;
 174
 175                 STAILQ_INIT(&cur_lun->attr_list);
 176                 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links);
 177
 178                 for (i = 0; attr[i] != NULL; i += 2) {
 179                         if (strcmp(attr[i], "id") == 0) {
 180                                 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0);
 181                         } else {
 182                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 183                                      __func__, attr[i], attr[i+1]);
 184                         }
 185                 }
 186         }
 187 }
 188
 189 static void
 190 cctl_end_element(void *user_data, const char *name)
 191 {
 192         struct cctl_devlist_data *devlist;
 193         struct cctl_lun *cur_lun;
 194         char *str;
 195
 196         devlist = (struct cctl_devlist_data *)user_data;
 197         cur_lun = devlist->cur_lun;
 198
 199         if ((cur_lun == NULL)
 200          && (strcmp(name, "ctllunlist") != 0))
 201                 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name);
 202
 203         if (devlist->cur_sb[devlist->level] == NULL)
 204                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 205                      devlist->level, name);
 206
 207         sbuf_finish(devlist->cur_sb[devlist->level]);
 208         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 209
 210         if (strlen(str) == 0) {
 211                 free(str);
 212                 str = NULL;
 213         }
 214
 215         sbuf_delete(devlist->cur_sb[devlist->level]);
 216         devlist->cur_sb[devlist->level] = NULL;
 217         devlist->level--;
 218
 219         if (strcmp(name, "backend_type") == 0) {
 220                 cur_lun->backend_type = str;
 221                 str = NULL;
 222         } else if (strcmp(name, "size") == 0) {
 223                 cur_lun->size_blocks = strtoull(str, NULL, 0);
 224         } else if (strcmp(name, "blocksize") == 0) {
 225                 cur_lun->blocksize = strtoul(str, NULL, 0);
 226         } else if (strcmp(name, "serial_number") == 0) {
 227                 cur_lun->serial_number = str;
 228                 str = NULL;
 229         } else if (strcmp(name, "device_id") == 0) {
 230                 cur_lun->device_id = str;
 231                 str = NULL;
 232         } else if (strcmp(name, "ctld_name") == 0) {
 233                 cur_lun->ctld_name = str;
 234                 str = NULL;
 235         } else if (strcmp(name, "lun") == 0) {
 236                 devlist->cur_lun = NULL;
 237         } else if (strcmp(name, "ctllunlist") == 0) {
 238                 /* Nothing. */
 239         } else {
 240                 struct cctl_lun_nv *nv;
 241
 242                 nv = calloc(1, sizeof(*nv));
 243                 if (nv == NULL)
 244                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 245                             __func__, sizeof(*nv));
 246
 247                 nv->name = checked_strdup(name);
 248
 249                 nv->value = str;
 250                 str = NULL;
 251                 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links);
 252         }
 253
 254         free(str);
 255 }
 256
 257 static void
 258 cctl_start_pelement(void *user_data, const char *name, const char **attr)
 259 {
 260         int i;
 261         struct cctl_devlist_data *devlist;
 262         struct cctl_port *cur_port;
 263
 264         devlist = (struct cctl_devlist_data *)user_data;
 265         cur_port = devlist->cur_port;
 266         devlist->level++;
 267         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 268             sizeof(devlist->cur_sb[0])))
 269                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 270                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 271
 272         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 273         if (devlist->cur_sb[devlist->level] == NULL)
 274                 log_err(1, "%s: unable to allocate sbuf", __func__);
 275
 276         if (strcmp(name, "targ_port") == 0) {
 277                 if (cur_port != NULL)
 278                         log_errx(1, "%s: improper port element nesting (%s)",
 279                             __func__, name);
 280
 281                 cur_port = calloc(1, sizeof(*cur_port));
 282                 if (cur_port == NULL)
 283                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 284                             sizeof(*cur_port));
 285
 286                 devlist->num_ports++;
 287                 devlist->cur_port = cur_port;
 288
 289                 STAILQ_INIT(&cur_port->attr_list);
 290                 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links);
 291
 292                 for (i = 0; attr[i] != NULL; i += 2) {
 293                         if (strcmp(attr[i], "id") == 0) {
 294                                 cur_port->port_id = strtoul(attr[i+1], NULL, 0);
 295                         } else {
 296                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 297                                      __func__, attr[i], attr[i+1]);
 298                         }
 299                 }
 300         }
 301 }
 302
 303 static void
 304 cctl_end_pelement(void *user_data, const char *name)
 305 {
 306         struct cctl_devlist_data *devlist;
 307         struct cctl_port *cur_port;
 308         char *str;
 309
 310         devlist = (struct cctl_devlist_data *)user_data;
 311         cur_port = devlist->cur_port;
 312
 313         if ((cur_port == NULL)
 314          && (strcmp(name, "ctlportlist") != 0))
 315                 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name);
 316
 317         if (devlist->cur_sb[devlist->level] == NULL)
 318                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 319                      devlist->level, name);
 320
 321         sbuf_finish(devlist->cur_sb[devlist->level]);
 322         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 323
 324         if (strlen(str) == 0) {
 325                 free(str);
 326                 str = NULL;
 327         }
 328
 329         sbuf_delete(devlist->cur_sb[devlist->level]);
 330         devlist->cur_sb[devlist->level] = NULL;
 331         devlist->level--;
 332
 333         if (strcmp(name, "cfiscsi_target") == 0) {
 334                 cur_port->cfiscsi_target = str;
 335                 str = NULL;
 336         } else if (strcmp(name, "cfiscsi_state") == 0) {
 337                 cur_port->cfiscsi_state = strtoul(str, NULL, 0);
 338         } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) {
 339                 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0);
 340         } else if (strcmp(name, "ctld_portal_group_name") == 0) {
 341                 cur_port->ctld_portal_group_name = str;
 342                 str = NULL;
 343         } else if (strcmp(name, "targ_port") == 0) {
 344                 devlist->cur_port = NULL;
 345         } else if (strcmp(name, "ctlportlist") == 0) {
 346                 /* Nothing. */
 347         } else {
 348                 struct cctl_lun_nv *nv;
 349
 350                 nv = calloc(1, sizeof(*nv));
 351                 if (nv == NULL)
 352                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 353                             __func__, sizeof(*nv));
 354
 355                 nv->name = checked_strdup(name);
 356
 357                 nv->value = str;
 358                 str = NULL;
 359                 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links);
 360         }
 361
 362         free(str);
 363 }
 364
 365 static void
 366 cctl_char_handler(void *user_data, const XML_Char *str, int len)
 367 {
 368         struct cctl_devlist_data *devlist;
 369
 370         devlist = (struct cctl_devlist_data *)user_data;
 371
 372         sbuf_bcat(devlist->cur_sb[devlist->level], str, len);
 373 }
 374
 375 struct conf *
 376 conf_new_from_kernel(void)
 377 {
 378         struct conf *conf = NULL;
 379         struct target *targ;
 380         struct portal_group *pg;
 381         struct port *cp;
 382         struct lun *cl;
 383         struct lun_option *lo;
 384         struct ctl_lun_list list;
 385         struct cctl_devlist_data devlist;
 386         struct cctl_lun *lun;
 387         struct cctl_port *port;
 388         XML_Parser parser;
 389         char *str;
 390         int len, retval;
 391
 392         bzero(&devlist, sizeof(devlist));
 393         STAILQ_INIT(&devlist.lun_list);
 394         STAILQ_INIT(&devlist.port_list);
 395
 396         log_debugx("obtaining previously configured CTL luns from the kernel");
 397
 398         str = NULL;
 399         len = 4096;
 400 retry:
 401         str = realloc(str, len);
 402         if (str == NULL)
 403                 log_err(1, "realloc");
 404
 405         bzero(&list, sizeof(list));
 406         list.alloc_len = len;
 407         list.status = CTL_LUN_LIST_NONE;
 408         list.lun_xml = str;
 409
 410         if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) {
 411                 log_warn("error issuing CTL_LUN_LIST ioctl");
 412                 free(str);
 413                 return (NULL);
 414         }
 415
 416         if (list.status == CTL_LUN_LIST_ERROR) {
 417                 log_warnx("error returned from CTL_LUN_LIST ioctl: %s",
 418                     list.error_str);
 419                 free(str);
 420                 return (NULL);
 421         }
 422
 423         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 424                 len = len << 1;
 425                 goto retry;
 426         }
 427
 428         parser = XML_ParserCreate(NULL);
 429         if (parser == NULL) {
 430                 log_warnx("unable to create XML parser");
 431                 free(str);
 432                 return (NULL);
 433         }
 434
 435         XML_SetUserData(parser, &devlist);
 436         XML_SetElementHandler(parser, cctl_start_element, cctl_end_element);
 437         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 438
 439         retval = XML_Parse(parser, str, strlen(str), 1);
 440         XML_ParserFree(parser);
 441         free(str);
 442         if (retval != 1) {
 443                 log_warnx("XML_Parse failed");
 444                 return (NULL);
 445         }
 446
 447         str = NULL;
 448         len = 4096;
 449 retry_port:
 450         str = realloc(str, len);
 451         if (str == NULL)
 452                 log_err(1, "realloc");
 453
 454         bzero(&list, sizeof(list));
 455         list.alloc_len = len;
 456         list.status = CTL_LUN_LIST_NONE;
 457         list.lun_xml = str;
 458
 459         if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) {
 460                 log_warn("error issuing CTL_PORT_LIST ioctl");
 461                 free(str);
 462                 return (NULL);
 463         }
 464
 465         if (list.status == CTL_PORT_LIST_ERROR) {
 466                 log_warnx("error returned from CTL_PORT_LIST ioctl: %s",
 467                     list.error_str);
 468                 free(str);
 469                 return (NULL);
 470         }
 471
 472         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 473                 len = len << 1;
 474                 goto retry_port;
 475         }
 476
 477         parser = XML_ParserCreate(NULL);
 478         if (parser == NULL) {
 479                 log_warnx("unable to create XML parser");
 480                 free(str);
 481                 return (NULL);
 482         }
 483
 484         XML_SetUserData(parser, &devlist);
 485         XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement);
 486         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 487
 488         retval = XML_Parse(parser, str, strlen(str), 1);
 489         XML_ParserFree(parser);
 490         free(str);
 491         if (retval != 1) {
 492                 log_warnx("XML_Parse failed");
 493                 return (NULL);
 494         }
 495
 496         conf = conf_new();
 497
 498         STAILQ_FOREACH(port, &devlist.port_list, links) {
 499
 500                 if (port->cfiscsi_target == NULL) {
 501                         log_debugx("CTL port %ju wasn't managed by ctld; "
 502                             "ignoring", (uintmax_t)port->port_id);
 503                         continue;
 504                 }
 505                 if (port->cfiscsi_state != 1) {
 506                         log_debugx("CTL port %ju is not active (%d); ignoring",
 507                             (uintmax_t)port->port_id, port->cfiscsi_state);
 508                         continue;
 509                 }
 510
 511                 targ = target_find(conf, port->cfiscsi_target);
 512                 if (targ == NULL) {
 513 #if 0
 514                         log_debugx("found new kernel target %s for CTL port %ld",
 515                             port->cfiscsi_target, port->port_id);
 516 #endif
 517                         targ = target_new(conf, port->cfiscsi_target);
 518                         if (targ == NULL) {
 519                                 log_warnx("target_new failed");
 520                                 continue;
 521                         }
 522                 }
 523
 524                 if (port->ctld_portal_group_name == NULL)
 525                         continue;
 526                 pg = portal_group_find(conf, port->ctld_portal_group_name);
 527                 if (pg == NULL) {
 528 #if 0
 529                         log_debugx("found new kernel portal group %s for CTL port %ld",
 530                             port->ctld_portal_group_name, port->port_id);
 531 #endif
 532                         pg = portal_group_new(conf, port->ctld_portal_group_name);
 533                         if (pg == NULL) {
 534                                 log_warnx("portal_group_new failed");
 535                                 continue;
 536                         }
 537                 }
 538                 pg->pg_tag = port->cfiscsi_portal_group_tag;
 539                 cp = port_new(conf, targ, pg);
 540                 if (cp == NULL) {
 541                         log_warnx("port_new failed");
 542                         continue;
 543                 }
 544                 cp->p_ctl_port = port->port_id;
 545         }
 546
 547         STAILQ_FOREACH(lun, &devlist.lun_list, links) {
 548                 struct cctl_lun_nv *nv;
 549
 550                 if (lun->ctld_name == NULL) {
 551                         log_debugx("CTL lun %ju wasn't managed by ctld; "
 552                             "ignoring", (uintmax_t)lun->lun_id);
 553                         continue;
 554                 }
 555
 556                 cl = lun_find(conf, lun->ctld_name);
 557                 if (cl != NULL) {
 558                         log_warnx("found CTL lun %ju \"%s\", "
 559                             "also backed by CTL lun %d; ignoring",
 560                             (uintmax_t)lun->lun_id, lun->ctld_name,
 561                             cl->l_ctl_lun);
 562                         continue;
 563                 }
 564
 565                 log_debugx("found CTL lun %ju \"%s\"",
 566                     (uintmax_t)lun->lun_id, lun->ctld_name);
 567
 568                 cl = lun_new(conf, lun->ctld_name);
 569                 if (cl == NULL) {
 570                         log_warnx("lun_new failed");
 571                         continue;
 572                 }
 573                 lun_set_backend(cl, lun->backend_type);
 574                 lun_set_blocksize(cl, lun->blocksize);
 575                 lun_set_device_id(cl, lun->device_id);
 576                 lun_set_serial(cl, lun->serial_number);
 577                 lun_set_size(cl, lun->size_blocks * cl->l_blocksize);
 578                 lun_set_ctl_lun(cl, lun->lun_id);
 579
 580                 STAILQ_FOREACH(nv, &lun->attr_list, links) {
 581                         if (strcmp(nv->name, "file") == 0 ||
 582                             strcmp(nv->name, "dev") == 0) {
 583                                 lun_set_path(cl, nv->value);
 584                                 continue;
 585                         }
 586                         lo = lun_option_new(cl, nv->name, nv->value);
 587                         if (lo == NULL)
 588                                 log_warnx("unable to add CTL lun option %s "
 589                                     "for CTL lun %ju \"%s\"",
 590                                     nv->name, (uintmax_t) lun->lun_id,
 591                                     cl->l_name);
 592                 }
 593         }
 594
 595         return (conf);
 596 }
 597
 598 static void
 599 str_arg(struct ctl_be_arg *arg, const char *name, const char *value)
 600 {
 601
 602         arg->namelen = strlen(name) + 1;
 603         arg->name = __DECONST(char *, name);
 604         arg->vallen = strlen(value) + 1;
 605         arg->value = __DECONST(char *, value);
 606         arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD;
 607 }
 608
 609 int
 610 kernel_lun_add(struct lun *lun)
 611 {
 612         struct lun_option *lo;
 613         struct ctl_lun_req req;
 614         int error, i, num_options;
 615
 616         bzero(&req, sizeof(req));
 617
 618         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 619         req.reqtype = CTL_LUNREQ_CREATE;
 620
 621         req.reqdata.create.blocksize_bytes = lun->l_blocksize;
 622
 623         if (lun->l_size != 0)
 624                 req.reqdata.create.lun_size_bytes = lun->l_size;
 625
 626         req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE;
 627         req.reqdata.create.device_type = T_DIRECT;
 628
 629         if (lun->l_serial != NULL) {
 630                 strncpy(req.reqdata.create.serial_num, lun->l_serial,
 631                         sizeof(req.reqdata.create.serial_num));
 632                 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM;
 633         }
 634
 635         if (lun->l_device_id != NULL) {
 636                 strncpy(req.reqdata.create.device_id, lun->l_device_id,
 637                         sizeof(req.reqdata.create.device_id));
 638                 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID;
 639         }
 640
 641         if (lun->l_path != NULL) {
 642                 lo = lun_option_find(lun, "file");
 643                 if (lo != NULL) {
 644                         lun_option_set(lo, lun->l_path);
 645                 } else {
 646                         lo = lun_option_new(lun, "file", lun->l_path);
 647                         assert(lo != NULL);
 648                 }
 649         }
 650
 651         lo = lun_option_find(lun, "ctld_name");
 652         if (lo != NULL) {
 653                 lun_option_set(lo, lun->l_name);
 654         } else {
 655                 lo = lun_option_new(lun, "ctld_name", lun->l_name);
 656                 assert(lo != NULL);
 657         }
 658
 659         lo = lun_option_find(lun, "scsiname");
 660         if (lo == NULL && lun->l_scsiname != NULL) {
 661                 lo = lun_option_new(lun, "scsiname", lun->l_scsiname);
 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         switch (req.status) {
 694         case CTL_LUN_ERROR:
 695                 log_warnx("LUN creation error: %s", req.error_str);
 696                 return (1);
 697         case CTL_LUN_WARNING:
 698                 log_warnx("LUN creation warning: %s", req.error_str);
 699                 break;
 700         case CTL_LUN_OK:
 701                 break;
 702         default:
 703                 log_warnx("unknown LUN creation status: %d",
 704                     req.status);
 705                 return (1);
 706         }
 707
 708         lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id);
 709         return (0);
 710 }
 711
 712 int
 713 kernel_lun_resize(struct lun *lun)
 714 {
 715         struct ctl_lun_req req;
 716
 717         bzero(&req, sizeof(req));
 718
 719         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 720         req.reqtype = CTL_LUNREQ_MODIFY;
 721
 722         req.reqdata.modify.lun_id = lun->l_ctl_lun;
 723         req.reqdata.modify.lun_size_bytes = lun->l_size;
 724
 725         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 726                 log_warn("error issuing CTL_LUN_REQ ioctl");
 727                 return (1);
 728         }
 729
 730         switch (req.status) {
 731         case CTL_LUN_ERROR:
 732                 log_warnx("LUN modification error: %s", req.error_str);
 733                 return (1);
 734         case CTL_LUN_WARNING:
 735                 log_warnx("LUN modification warning: %s", req.error_str);
 736                 break;
 737         case CTL_LUN_OK:
 738                 break;
 739         default:
 740                 log_warnx("unknown LUN modification status: %d",
 741                     req.status);
 742                 return (1);
 743         }
 744
 745         return (0);
 746 }
 747
 748 int
 749 kernel_lun_remove(struct lun *lun)
 750 {
 751         struct ctl_lun_req req;
 752
 753         bzero(&req, sizeof(req));
 754
 755         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 756         req.reqtype = CTL_LUNREQ_RM;
 757
 758         req.reqdata.rm.lun_id = lun->l_ctl_lun;
 759
 760         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 761                 log_warn("error issuing CTL_LUN_REQ ioctl");
 762                 return (1);
 763         }
 764
 765         switch (req.status) {
 766         case CTL_LUN_ERROR:
 767                 log_warnx("LUN removal error: %s", req.error_str);
 768                 return (1);
 769         case CTL_LUN_WARNING:
 770                 log_warnx("LUN removal warning: %s", req.error_str);
 771                 break;
 772         case CTL_LUN_OK:
 773                 break;
 774         default:
 775                 log_warnx("unknown LUN removal status: %d", req.status);
 776                 return (1);
 777         }
 778
 779         return (0);
 780 }
 781
 782 void
 783 kernel_handoff(struct connection *conn)
 784 {
 785         struct ctl_iscsi req;
 786
 787         bzero(&req, sizeof(req));
 788
 789         req.type = CTL_ISCSI_HANDOFF;
 790         strlcpy(req.data.handoff.initiator_name,
 791             conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name));
 792         strlcpy(req.data.handoff.initiator_addr,
 793             conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr));
 794         if (conn->conn_initiator_alias != NULL) {
 795                 strlcpy(req.data.handoff.initiator_alias,
 796                     conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias));
 797         }
 798         memcpy(req.data.handoff.initiator_isid, conn->conn_initiator_isid,
 799             sizeof(req.data.handoff.initiator_isid));
 800         strlcpy(req.data.handoff.target_name,
 801             conn->conn_target->t_name, sizeof(req.data.handoff.target_name));
 802 #ifdef ICL_KERNEL_PROXY
 803         if (proxy_mode)
 804                 req.data.handoff.connection_id = conn->conn_socket;
 805         else
 806                 req.data.handoff.socket = conn->conn_socket;
 807 #else
 808         req.data.handoff.socket = conn->conn_socket;
 809 #endif
 810         req.data.handoff.portal_group_tag =
 811             conn->conn_portal->p_portal_group->pg_tag;
 812         if (conn->conn_header_digest == CONN_DIGEST_CRC32C)
 813                 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C;
 814         if (conn->conn_data_digest == CONN_DIGEST_CRC32C)
 815                 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C;
 816         req.data.handoff.cmdsn = conn->conn_cmdsn;
 817         req.data.handoff.statsn = conn->conn_statsn;
 818         req.data.handoff.max_recv_data_segment_length =
 819             conn->conn_max_data_segment_length;
 820         req.data.handoff.max_burst_length = conn->conn_max_burst_length;
 821         req.data.handoff.immediate_data = conn->conn_immediate_data;
 822
 823         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 824                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 825                     "dropping connection");
 826         }
 827
 828         if (req.status != CTL_ISCSI_OK) {
 829                 log_errx(1, "error returned from CTL iSCSI handoff request: "
 830                     "%s; dropping connection", req.error_str);
 831         }
 832 }
 833
 834 int
 835 kernel_port_add(struct port *port)
 836 {
 837         struct ctl_port_entry entry;
 838         struct ctl_req req;
 839         struct ctl_lun_map lm;
 840         struct target *targ = port->p_target;
 841         struct portal_group *pg = port->p_portal_group;
 842         char tagstr[16];
 843         int error, i, n;
 844
 845         /* Create iSCSI port. */
 846         bzero(&req, sizeof(req));
 847         strlcpy(req.driver, "iscsi", sizeof(req.driver));
 848         req.reqtype = CTL_REQ_CREATE;
 849         req.args = malloc(req.num_args * sizeof(*req.args));
 850         n = 0;
 851         req.args[n].namelen = sizeof("port_id");
 852         req.args[n].name = __DECONST(char *, "port_id");
 853         req.args[n].vallen = sizeof(port->p_ctl_port);
 854         req.args[n].value = &port->p_ctl_port;
 855         req.args[n++].flags = CTL_BEARG_WR;
 856         str_arg(&req.args[n++], "cfiscsi_target", targ->t_name);
 857         snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
 858         str_arg(&req.args[n++], "cfiscsi_portal_group_tag", tagstr);
 859         if (targ->t_alias)
 860                 str_arg(&req.args[n++], "cfiscsi_target_alias", targ->t_alias);
 861         str_arg(&req.args[n++], "ctld_portal_group_name", pg->pg_name);
 862         req.num_args = n;
 863         error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
 864         free(req.args);
 865         if (error != 0) {
 866                 log_warn("error issuing CTL_PORT_REQ ioctl");
 867                 return (1);
 868         }
 869         if (req.status == CTL_LUN_ERROR) {
 870                 log_warnx("error returned from port creation request: %s",
 871                     req.error_str);
 872                 return (1);
 873         }
 874         if (req.status != CTL_LUN_OK) {
 875                 log_warnx("unknown port creation request status %d",
 876                     req.status);
 877                 return (1);
 878         }
 879
 880         /* Explicitly enable mapping to block any access except allowed. */
 881         lm.port = port->p_ctl_port;
 882         lm.plun = UINT32_MAX;
 883         lm.lun = 0;
 884         error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 885         if (error != 0)
 886                 log_warn("CTL_LUN_MAP ioctl failed");
 887
 888         /* Map configured LUNs */
 889         for (i = 0; i < MAX_LUNS; i++) {
 890                 if (targ->t_luns[i] == NULL)
 891                         continue;
 892                 lm.port = port->p_ctl_port;
 893                 lm.plun = i;
 894                 lm.lun = targ->t_luns[i]->l_ctl_lun;
 895                 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 896                 if (error != 0)
 897                         log_warn("CTL_LUN_MAP ioctl failed");
 898         }
 899
 900         /* Enable port */
 901         bzero(&entry, sizeof(entry));
 902         entry.targ_port = port->p_ctl_port;
 903         error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry);
 904         if (error != 0) {
 905                 log_warn("CTL_ENABLE_PORT ioctl failed");
 906                 return (-1);
 907         }
 908
 909         return (0);
 910 }
 911
 912 int
 913 kernel_port_update(struct port *port)
 914 {
 915         struct ctl_lun_map lm;
 916         struct target *targ = port->p_target;
 917         int error, i;
 918
 919         /* Map configured LUNs and unmap others */
 920         for (i = 0; i < MAX_LUNS; i++) {
 921                 lm.port = port->p_ctl_port;
 922                 lm.plun = i;
 923                 if (targ->t_luns[i] == NULL)
 924                         lm.lun = UINT32_MAX;
 925                 else
 926                         lm.lun = targ->t_luns[i]->l_ctl_lun;
 927                 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 928                 if (error != 0)
 929                         log_warn("CTL_LUN_MAP ioctl failed");
 930         }
 931         return (0);
 932 }
 933
 934 int
 935 kernel_port_remove(struct port *port)
 936 {
 937         struct ctl_req req;
 938         char tagstr[16];
 939         struct target *targ = port->p_target;
 940         struct portal_group *pg = port->p_portal_group;
 941         int error;
 942
 943         bzero(&req, sizeof(req));
 944         strlcpy(req.driver, "iscsi", sizeof(req.driver));
 945         req.reqtype = CTL_REQ_REMOVE;
 946         req.num_args = 2;
 947         req.args = malloc(req.num_args * sizeof(*req.args));
 948         str_arg(&req.args[0], "cfiscsi_target", targ->t_name);
 949         snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
 950         str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr);
 951
 952         error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
 953         free(req.args);
 954         if (error != 0) {
 955                 log_warn("error issuing CTL_PORT_REQ ioctl");
 956                 return (1);
 957         }
 958
 959         if (req.status == CTL_LUN_ERROR) {
 960                 log_warnx("error returned from port removal request: %s",
 961                     req.error_str);
 962                 return (1);
 963         }
 964
 965         if (req.status != CTL_LUN_OK) {
 966                 log_warnx("unknown port removal request status %d",
 967                     req.status);
 968                 return (1);
 969         }
 970
 971         return (0);
 972 }
 973
 974 #ifdef ICL_KERNEL_PROXY
 975 void
 976 kernel_listen(struct addrinfo *ai, bool iser, int portal_id)
 977 {
 978         struct ctl_iscsi req;
 979
 980         bzero(&req, sizeof(req));
 981
 982         req.type = CTL_ISCSI_LISTEN;
 983         req.data.listen.iser = iser;
 984         req.data.listen.domain = ai->ai_family;
 985         req.data.listen.socktype = ai->ai_socktype;
 986         req.data.listen.protocol = ai->ai_protocol;
 987         req.data.listen.addr = ai->ai_addr;
 988         req.data.listen.addrlen = ai->ai_addrlen;
 989         req.data.listen.portal_id = portal_id;
 990
 991         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
 992                 log_err(1, "error issuing CTL_ISCSI ioctl");
 993
 994         if (req.status != CTL_ISCSI_OK) {
 995                 log_errx(1, "error returned from CTL iSCSI listen: %s",
 996                     req.error_str);
 997         }
 998 }
 999
1000 void
1001 kernel_accept(int *connection_id, int *portal_id,
1002     struct sockaddr *client_sa, socklen_t *client_salen)
1003 {
1004         struct ctl_iscsi req;
1005         struct sockaddr_storage ss;
1006
1007         bzero(&req, sizeof(req));
1008
1009         req.type = CTL_ISCSI_ACCEPT;
1010         req.data.accept.initiator_addr = (struct sockaddr *)&ss;
1011
1012         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
1013                 log_err(1, "error issuing CTL_ISCSI ioctl");
1014
1015         if (req.status != CTL_ISCSI_OK) {
1016                 log_errx(1, "error returned from CTL iSCSI accept: %s",
1017                     req.error_str);
1018         }
1019
1020         *connection_id = req.data.accept.connection_id;
1021         *portal_id = req.data.accept.portal_id;
1022         *client_salen = req.data.accept.initiator_addrlen;
1023         memcpy(client_sa, &ss, *client_salen);
1024 }
1025
1026 void
1027 kernel_send(struct pdu *pdu)
1028 {
1029         struct ctl_iscsi req;
1030
1031         bzero(&req, sizeof(req));
1032
1033         req.type = CTL_ISCSI_SEND;
1034         req.data.send.connection_id = pdu->pdu_connection->conn_socket;
1035         req.data.send.bhs = pdu->pdu_bhs;
1036         req.data.send.data_segment_len = pdu->pdu_data_len;
1037         req.data.send.data_segment = pdu->pdu_data;
1038
1039         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1040                 log_err(1, "error issuing CTL_ISCSI ioctl; "
1041                     "dropping connection");
1042         }
1043
1044         if (req.status != CTL_ISCSI_OK) {
1045                 log_errx(1, "error returned from CTL iSCSI send: "
1046                     "%s; dropping connection", req.error_str);
1047         }
1048 }
1049
1050 void
1051 kernel_receive(struct pdu *pdu)
1052 {
1053         struct ctl_iscsi req;
1054
1055         pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH);
1056         if (pdu->pdu_data == NULL)
1057                 log_err(1, "malloc");
1058
1059         bzero(&req, sizeof(req));
1060
1061         req.type = CTL_ISCSI_RECEIVE;
1062         req.data.receive.connection_id = pdu->pdu_connection->conn_socket;
1063         req.data.receive.bhs = pdu->pdu_bhs;
1064         req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH;
1065         req.data.receive.data_segment = pdu->pdu_data;
1066
1067         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1068                 log_err(1, "error issuing CTL_ISCSI ioctl; "
1069                     "dropping connection");
1070         }
1071
1072         if (req.status != CTL_ISCSI_OK) {
1073                 log_errx(1, "error returned from CTL iSCSI receive: "
1074                     "%s; dropping connection", req.error_str);
1075         }
1076
1077 }
1078
1079 #endif /* ICL_KERNEL_PROXY */
1080
1081 /*
1082  * XXX: I CANT INTO LATIN
1083  */
1084 void
1085 kernel_capsicate(void)
1086 {
1087         int error;
1088         cap_rights_t rights;
1089         const unsigned long cmds[] = { CTL_ISCSI };
1090
1091         cap_rights_init(&rights, CAP_IOCTL);
1092         error = cap_rights_limit(ctl_fd, &rights);
1093         if (error != 0 && errno != ENOSYS)
1094                 log_err(1, "cap_rights_limit");
1095
1096         error = cap_ioctls_limit(ctl_fd, cmds,
1097             sizeof(cmds) / sizeof(cmds[0]));
1098         if (error != 0 && errno != ENOSYS)
1099                 log_err(1, "cap_ioctls_limit");
1100
1101         error = cap_enter();
1102         if (error != 0 && errno != ENOSYS)
1103                 log_err(1, "cap_enter");
1104
1105         if (cap_sandboxed())
1106                 log_debugx("Capsicum capability mode enabled");
1107         else
1108                 log_warnx("Capsicum capability mode not supported");
1109 }
1110