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/capsicum.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         char *port_name;
 125         int cfiscsi_state;
 126         char *cfiscsi_target;
 127         uint16_t cfiscsi_portal_group_tag;
 128         char *ctld_portal_group_name;
 129         STAILQ_HEAD(,cctl_lun_nv) attr_list;
 130         STAILQ_ENTRY(cctl_port) links;
 131 };
 132
 133 struct cctl_devlist_data {
 134         int num_luns;
 135         STAILQ_HEAD(,cctl_lun) lun_list;
 136         struct cctl_lun *cur_lun;
 137         int num_ports;
 138         STAILQ_HEAD(,cctl_port) port_list;
 139         struct cctl_port *cur_port;
 140         int level;
 141         struct sbuf *cur_sb[32];
 142 };
 143
 144 static void
 145 cctl_start_element(void *user_data, const char *name, const char **attr)
 146 {
 147         int i;
 148         struct cctl_devlist_data *devlist;
 149         struct cctl_lun *cur_lun;
 150
 151         devlist = (struct cctl_devlist_data *)user_data;
 152         cur_lun = devlist->cur_lun;
 153         devlist->level++;
 154         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 155             sizeof(devlist->cur_sb[0])))
 156                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 157                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 158
 159         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 160         if (devlist->cur_sb[devlist->level] == NULL)
 161                 log_err(1, "%s: unable to allocate sbuf", __func__);
 162
 163         if (strcmp(name, "lun") == 0) {
 164                 if (cur_lun != NULL)
 165                         log_errx(1, "%s: improper lun element nesting",
 166                             __func__);
 167
 168                 cur_lun = calloc(1, sizeof(*cur_lun));
 169                 if (cur_lun == NULL)
 170                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 171                             sizeof(*cur_lun));
 172
 173                 devlist->num_luns++;
 174                 devlist->cur_lun = cur_lun;
 175
 176                 STAILQ_INIT(&cur_lun->attr_list);
 177                 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links);
 178
 179                 for (i = 0; attr[i] != NULL; i += 2) {
 180                         if (strcmp(attr[i], "id") == 0) {
 181                                 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0);
 182                         } else {
 183                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 184                                      __func__, attr[i], attr[i+1]);
 185                         }
 186                 }
 187         }
 188 }
 189
 190 static void
 191 cctl_end_element(void *user_data, const char *name)
 192 {
 193         struct cctl_devlist_data *devlist;
 194         struct cctl_lun *cur_lun;
 195         char *str;
 196
 197         devlist = (struct cctl_devlist_data *)user_data;
 198         cur_lun = devlist->cur_lun;
 199
 200         if ((cur_lun == NULL)
 201          && (strcmp(name, "ctllunlist") != 0))
 202                 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name);
 203
 204         if (devlist->cur_sb[devlist->level] == NULL)
 205                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 206                      devlist->level, name);
 207
 208         sbuf_finish(devlist->cur_sb[devlist->level]);
 209         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 210
 211         if (strlen(str) == 0) {
 212                 free(str);
 213                 str = NULL;
 214         }
 215
 216         sbuf_delete(devlist->cur_sb[devlist->level]);
 217         devlist->cur_sb[devlist->level] = NULL;
 218         devlist->level--;
 219
 220         if (strcmp(name, "backend_type") == 0) {
 221                 cur_lun->backend_type = str;
 222                 str = NULL;
 223         } else if (strcmp(name, "size") == 0) {
 224                 cur_lun->size_blocks = strtoull(str, NULL, 0);
 225         } else if (strcmp(name, "blocksize") == 0) {
 226                 cur_lun->blocksize = strtoul(str, NULL, 0);
 227         } else if (strcmp(name, "serial_number") == 0) {
 228                 cur_lun->serial_number = str;
 229                 str = NULL;
 230         } else if (strcmp(name, "device_id") == 0) {
 231                 cur_lun->device_id = str;
 232                 str = NULL;
 233         } else if (strcmp(name, "ctld_name") == 0) {
 234                 cur_lun->ctld_name = str;
 235                 str = NULL;
 236         } else if (strcmp(name, "lun") == 0) {
 237                 devlist->cur_lun = NULL;
 238         } else if (strcmp(name, "ctllunlist") == 0) {
 239                 /* Nothing. */
 240         } else {
 241                 struct cctl_lun_nv *nv;
 242
 243                 nv = calloc(1, sizeof(*nv));
 244                 if (nv == NULL)
 245                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 246                             __func__, sizeof(*nv));
 247
 248                 nv->name = checked_strdup(name);
 249
 250                 nv->value = str;
 251                 str = NULL;
 252                 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links);
 253         }
 254
 255         free(str);
 256 }
 257
 258 static void
 259 cctl_start_pelement(void *user_data, const char *name, const char **attr)
 260 {
 261         int i;
 262         struct cctl_devlist_data *devlist;
 263         struct cctl_port *cur_port;
 264
 265         devlist = (struct cctl_devlist_data *)user_data;
 266         cur_port = devlist->cur_port;
 267         devlist->level++;
 268         if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) /
 269             sizeof(devlist->cur_sb[0])))
 270                 log_errx(1, "%s: too many nesting levels, %zd max", __func__,
 271                      sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0]));
 272
 273         devlist->cur_sb[devlist->level] = sbuf_new_auto();
 274         if (devlist->cur_sb[devlist->level] == NULL)
 275                 log_err(1, "%s: unable to allocate sbuf", __func__);
 276
 277         if (strcmp(name, "targ_port") == 0) {
 278                 if (cur_port != NULL)
 279                         log_errx(1, "%s: improper port element nesting (%s)",
 280                             __func__, name);
 281
 282                 cur_port = calloc(1, sizeof(*cur_port));
 283                 if (cur_port == NULL)
 284                         log_err(1, "%s: cannot allocate %zd bytes", __func__,
 285                             sizeof(*cur_port));
 286
 287                 devlist->num_ports++;
 288                 devlist->cur_port = cur_port;
 289
 290                 STAILQ_INIT(&cur_port->attr_list);
 291                 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links);
 292
 293                 for (i = 0; attr[i] != NULL; i += 2) {
 294                         if (strcmp(attr[i], "id") == 0) {
 295                                 cur_port->port_id = strtoul(attr[i+1], NULL, 0);
 296                         } else {
 297                                 log_errx(1, "%s: invalid LUN attribute %s = %s",
 298                                      __func__, attr[i], attr[i+1]);
 299                         }
 300                 }
 301         }
 302 }
 303
 304 static void
 305 cctl_end_pelement(void *user_data, const char *name)
 306 {
 307         struct cctl_devlist_data *devlist;
 308         struct cctl_port *cur_port;
 309         char *str;
 310
 311         devlist = (struct cctl_devlist_data *)user_data;
 312         cur_port = devlist->cur_port;
 313
 314         if ((cur_port == NULL)
 315          && (strcmp(name, "ctlportlist") != 0))
 316                 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name);
 317
 318         if (devlist->cur_sb[devlist->level] == NULL)
 319                 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__,
 320                      devlist->level, name);
 321
 322         sbuf_finish(devlist->cur_sb[devlist->level]);
 323         str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level]));
 324
 325         if (strlen(str) == 0) {
 326                 free(str);
 327                 str = NULL;
 328         }
 329
 330         sbuf_delete(devlist->cur_sb[devlist->level]);
 331         devlist->cur_sb[devlist->level] = NULL;
 332         devlist->level--;
 333
 334         if (strcmp(name, "port_name") == 0) {
 335                 cur_port->port_name = str;
 336                 str = NULL;
 337         } else if (strcmp(name, "cfiscsi_target") == 0) {
 338                 cur_port->cfiscsi_target = str;
 339                 str = NULL;
 340         } else if (strcmp(name, "cfiscsi_state") == 0) {
 341                 cur_port->cfiscsi_state = strtoul(str, NULL, 0);
 342         } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) {
 343                 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0);
 344         } else if (strcmp(name, "ctld_portal_group_name") == 0) {
 345                 cur_port->ctld_portal_group_name = str;
 346                 str = NULL;
 347         } else if (strcmp(name, "targ_port") == 0) {
 348                 devlist->cur_port = NULL;
 349         } else if (strcmp(name, "ctlportlist") == 0) {
 350                 /* Nothing. */
 351         } else {
 352                 struct cctl_lun_nv *nv;
 353
 354                 nv = calloc(1, sizeof(*nv));
 355                 if (nv == NULL)
 356                         log_err(1, "%s: can't allocate %zd bytes for nv pair",
 357                             __func__, sizeof(*nv));
 358
 359                 nv->name = checked_strdup(name);
 360
 361                 nv->value = str;
 362                 str = NULL;
 363                 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links);
 364         }
 365
 366         free(str);
 367 }
 368
 369 static void
 370 cctl_char_handler(void *user_data, const XML_Char *str, int len)
 371 {
 372         struct cctl_devlist_data *devlist;
 373
 374         devlist = (struct cctl_devlist_data *)user_data;
 375
 376         sbuf_bcat(devlist->cur_sb[devlist->level], str, len);
 377 }
 378
 379 struct conf *
 380 conf_new_from_kernel(void)
 381 {
 382         struct conf *conf = NULL;
 383         struct target *targ;
 384         struct portal_group *pg;
 385         struct pport *pp;
 386         struct port *cp;
 387         struct lun *cl;
 388         struct lun_option *lo;
 389         struct ctl_lun_list list;
 390         struct cctl_devlist_data devlist;
 391         struct cctl_lun *lun;
 392         struct cctl_port *port;
 393         XML_Parser parser;
 394         char *str;
 395         int len, retval;
 396
 397         bzero(&devlist, sizeof(devlist));
 398         STAILQ_INIT(&devlist.lun_list);
 399         STAILQ_INIT(&devlist.port_list);
 400
 401         log_debugx("obtaining previously configured CTL luns from the kernel");
 402
 403         str = NULL;
 404         len = 4096;
 405 retry:
 406         str = realloc(str, len);
 407         if (str == NULL)
 408                 log_err(1, "realloc");
 409
 410         bzero(&list, sizeof(list));
 411         list.alloc_len = len;
 412         list.status = CTL_LUN_LIST_NONE;
 413         list.lun_xml = str;
 414
 415         if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) {
 416                 log_warn("error issuing CTL_LUN_LIST ioctl");
 417                 free(str);
 418                 return (NULL);
 419         }
 420
 421         if (list.status == CTL_LUN_LIST_ERROR) {
 422                 log_warnx("error returned from CTL_LUN_LIST ioctl: %s",
 423                     list.error_str);
 424                 free(str);
 425                 return (NULL);
 426         }
 427
 428         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 429                 len = len << 1;
 430                 goto retry;
 431         }
 432
 433         parser = XML_ParserCreate(NULL);
 434         if (parser == NULL) {
 435                 log_warnx("unable to create XML parser");
 436                 free(str);
 437                 return (NULL);
 438         }
 439
 440         XML_SetUserData(parser, &devlist);
 441         XML_SetElementHandler(parser, cctl_start_element, cctl_end_element);
 442         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 443
 444         retval = XML_Parse(parser, str, strlen(str), 1);
 445         XML_ParserFree(parser);
 446         free(str);
 447         if (retval != 1) {
 448                 log_warnx("XML_Parse failed");
 449                 return (NULL);
 450         }
 451
 452         str = NULL;
 453         len = 4096;
 454 retry_port:
 455         str = realloc(str, len);
 456         if (str == NULL)
 457                 log_err(1, "realloc");
 458
 459         bzero(&list, sizeof(list));
 460         list.alloc_len = len;
 461         list.status = CTL_LUN_LIST_NONE;
 462         list.lun_xml = str;
 463
 464         if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) {
 465                 log_warn("error issuing CTL_PORT_LIST ioctl");
 466                 free(str);
 467                 return (NULL);
 468         }
 469
 470         if (list.status == CTL_PORT_LIST_ERROR) {
 471                 log_warnx("error returned from CTL_PORT_LIST ioctl: %s",
 472                     list.error_str);
 473                 free(str);
 474                 return (NULL);
 475         }
 476
 477         if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) {
 478                 len = len << 1;
 479                 goto retry_port;
 480         }
 481
 482         parser = XML_ParserCreate(NULL);
 483         if (parser == NULL) {
 484                 log_warnx("unable to create XML parser");
 485                 free(str);
 486                 return (NULL);
 487         }
 488
 489         XML_SetUserData(parser, &devlist);
 490         XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement);
 491         XML_SetCharacterDataHandler(parser, cctl_char_handler);
 492
 493         retval = XML_Parse(parser, str, strlen(str), 1);
 494         XML_ParserFree(parser);
 495         free(str);
 496         if (retval != 1) {
 497                 log_warnx("XML_Parse failed");
 498                 return (NULL);
 499         }
 500
 501         conf = conf_new();
 502
 503         STAILQ_FOREACH(port, &devlist.port_list, links) {
 504
 505                 if (port->cfiscsi_target == NULL) {
 506                         log_debugx("CTL port %u \"%s\" wasn't managed by ctld; ",
 507                             port->port_id, port->port_name);
 508                         pp = pport_find(conf, port->port_name);
 509                         if (pp == NULL) {
 510 #if 0
 511                                 log_debugx("found new kernel port %u \"%s\"",
 512                                     port->port_id, port->port_name);
 513 #endif
 514                                 pp = pport_new(conf, port->port_name, port->port_id);
 515                                 if (pp == NULL) {
 516                                         log_warnx("pport_new failed");
 517                                         continue;
 518                                 }
 519                         }
 520                         continue;
 521                 }
 522                 if (port->cfiscsi_state != 1) {
 523                         log_debugx("CTL port %ju is not active (%d); ignoring",
 524                             (uintmax_t)port->port_id, port->cfiscsi_state);
 525                         continue;
 526                 }
 527
 528                 targ = target_find(conf, port->cfiscsi_target);
 529                 if (targ == NULL) {
 530 #if 0
 531                         log_debugx("found new kernel target %s for CTL port %ld",
 532                             port->cfiscsi_target, port->port_id);
 533 #endif
 534                         targ = target_new(conf, port->cfiscsi_target);
 535                         if (targ == NULL) {
 536                                 log_warnx("target_new failed");
 537                                 continue;
 538                         }
 539                 }
 540
 541                 if (port->ctld_portal_group_name == NULL)
 542                         continue;
 543                 pg = portal_group_find(conf, port->ctld_portal_group_name);
 544                 if (pg == NULL) {
 545 #if 0
 546                         log_debugx("found new kernel portal group %s for CTL port %ld",
 547                             port->ctld_portal_group_name, port->port_id);
 548 #endif
 549                         pg = portal_group_new(conf, port->ctld_portal_group_name);
 550                         if (pg == NULL) {
 551                                 log_warnx("portal_group_new failed");
 552                                 continue;
 553                         }
 554                 }
 555                 pg->pg_tag = port->cfiscsi_portal_group_tag;
 556                 cp = port_new(conf, targ, pg);
 557                 if (cp == NULL) {
 558                         log_warnx("port_new failed");
 559                         continue;
 560                 }
 561                 cp->p_ctl_port = port->port_id;
 562         }
 563
 564         STAILQ_FOREACH(lun, &devlist.lun_list, links) {
 565                 struct cctl_lun_nv *nv;
 566
 567                 if (lun->ctld_name == NULL) {
 568                         log_debugx("CTL lun %ju wasn't managed by ctld; "
 569                             "ignoring", (uintmax_t)lun->lun_id);
 570                         continue;
 571                 }
 572
 573                 cl = lun_find(conf, lun->ctld_name);
 574                 if (cl != NULL) {
 575                         log_warnx("found CTL lun %ju \"%s\", "
 576                             "also backed by CTL lun %d; ignoring",
 577                             (uintmax_t)lun->lun_id, lun->ctld_name,
 578                             cl->l_ctl_lun);
 579                         continue;
 580                 }
 581
 582                 log_debugx("found CTL lun %ju \"%s\"",
 583                     (uintmax_t)lun->lun_id, lun->ctld_name);
 584
 585                 cl = lun_new(conf, lun->ctld_name);
 586                 if (cl == NULL) {
 587                         log_warnx("lun_new failed");
 588                         continue;
 589                 }
 590                 lun_set_backend(cl, lun->backend_type);
 591                 lun_set_blocksize(cl, lun->blocksize);
 592                 lun_set_device_id(cl, lun->device_id);
 593                 lun_set_serial(cl, lun->serial_number);
 594                 lun_set_size(cl, lun->size_blocks * cl->l_blocksize);
 595                 lun_set_ctl_lun(cl, lun->lun_id);
 596
 597                 STAILQ_FOREACH(nv, &lun->attr_list, links) {
 598                         if (strcmp(nv->name, "file") == 0 ||
 599                             strcmp(nv->name, "dev") == 0) {
 600                                 lun_set_path(cl, nv->value);
 601                                 continue;
 602                         }
 603                         lo = lun_option_new(cl, nv->name, nv->value);
 604                         if (lo == NULL)
 605                                 log_warnx("unable to add CTL lun option %s "
 606                                     "for CTL lun %ju \"%s\"",
 607                                     nv->name, (uintmax_t) lun->lun_id,
 608                                     cl->l_name);
 609                 }
 610         }
 611
 612         return (conf);
 613 }
 614
 615 static void
 616 str_arg(struct ctl_be_arg *arg, const char *name, const char *value)
 617 {
 618
 619         arg->namelen = strlen(name) + 1;
 620         arg->name = __DECONST(char *, name);
 621         arg->vallen = strlen(value) + 1;
 622         arg->value = __DECONST(char *, value);
 623         arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD;
 624 }
 625
 626 int
 627 kernel_lun_add(struct lun *lun)
 628 {
 629         struct lun_option *lo;
 630         struct ctl_lun_req req;
 631         int error, i, num_options;
 632
 633         bzero(&req, sizeof(req));
 634
 635         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 636         req.reqtype = CTL_LUNREQ_CREATE;
 637
 638         req.reqdata.create.blocksize_bytes = lun->l_blocksize;
 639
 640         if (lun->l_size != 0)
 641                 req.reqdata.create.lun_size_bytes = lun->l_size;
 642
 643         req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE;
 644         req.reqdata.create.device_type = T_DIRECT;
 645
 646         if (lun->l_serial != NULL) {
 647                 strncpy(req.reqdata.create.serial_num, lun->l_serial,
 648                         sizeof(req.reqdata.create.serial_num));
 649                 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM;
 650         }
 651
 652         if (lun->l_device_id != NULL) {
 653                 strncpy(req.reqdata.create.device_id, lun->l_device_id,
 654                         sizeof(req.reqdata.create.device_id));
 655                 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID;
 656         }
 657
 658         if (lun->l_path != NULL) {
 659                 lo = lun_option_find(lun, "file");
 660                 if (lo != NULL) {
 661                         lun_option_set(lo, lun->l_path);
 662                 } else {
 663                         lo = lun_option_new(lun, "file", lun->l_path);
 664                         assert(lo != NULL);
 665                 }
 666         }
 667
 668         lo = lun_option_find(lun, "ctld_name");
 669         if (lo != NULL) {
 670                 lun_option_set(lo, lun->l_name);
 671         } else {
 672                 lo = lun_option_new(lun, "ctld_name", lun->l_name);
 673                 assert(lo != NULL);
 674         }
 675
 676         lo = lun_option_find(lun, "scsiname");
 677         if (lo == NULL && lun->l_scsiname != NULL) {
 678                 lo = lun_option_new(lun, "scsiname", lun->l_scsiname);
 679                 assert(lo != NULL);
 680         }
 681
 682         num_options = 0;
 683         TAILQ_FOREACH(lo, &lun->l_options, lo_next)
 684                 num_options++;
 685
 686         req.num_be_args = num_options;
 687         if (num_options > 0) {
 688                 req.be_args = malloc(num_options * sizeof(*req.be_args));
 689                 if (req.be_args == NULL) {
 690                         log_warn("error allocating %zd bytes",
 691                             num_options * sizeof(*req.be_args));
 692                         return (1);
 693                 }
 694
 695                 i = 0;
 696                 TAILQ_FOREACH(lo, &lun->l_options, lo_next) {
 697                         str_arg(&req.be_args[i], lo->lo_name, lo->lo_value);
 698                         i++;
 699                 }
 700                 assert(i == num_options);
 701         }
 702
 703         error = ioctl(ctl_fd, CTL_LUN_REQ, &req);
 704         free(req.be_args);
 705         if (error != 0) {
 706                 log_warn("error issuing CTL_LUN_REQ ioctl");
 707                 return (1);
 708         }
 709
 710         switch (req.status) {
 711         case CTL_LUN_ERROR:
 712                 log_warnx("LUN creation error: %s", req.error_str);
 713                 return (1);
 714         case CTL_LUN_WARNING:
 715                 log_warnx("LUN creation warning: %s", req.error_str);
 716                 break;
 717         case CTL_LUN_OK:
 718                 break;
 719         default:
 720                 log_warnx("unknown LUN creation status: %d",
 721                     req.status);
 722                 return (1);
 723         }
 724
 725         lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id);
 726         return (0);
 727 }
 728
 729 int
 730 kernel_lun_resize(struct lun *lun)
 731 {
 732         struct ctl_lun_req req;
 733
 734         bzero(&req, sizeof(req));
 735
 736         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 737         req.reqtype = CTL_LUNREQ_MODIFY;
 738
 739         req.reqdata.modify.lun_id = lun->l_ctl_lun;
 740         req.reqdata.modify.lun_size_bytes = lun->l_size;
 741
 742         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 743                 log_warn("error issuing CTL_LUN_REQ ioctl");
 744                 return (1);
 745         }
 746
 747         switch (req.status) {
 748         case CTL_LUN_ERROR:
 749                 log_warnx("LUN modification error: %s", req.error_str);
 750                 return (1);
 751         case CTL_LUN_WARNING:
 752                 log_warnx("LUN modification warning: %s", req.error_str);
 753                 break;
 754         case CTL_LUN_OK:
 755                 break;
 756         default:
 757                 log_warnx("unknown LUN modification status: %d",
 758                     req.status);
 759                 return (1);
 760         }
 761
 762         return (0);
 763 }
 764
 765 int
 766 kernel_lun_remove(struct lun *lun)
 767 {
 768         struct ctl_lun_req req;
 769
 770         bzero(&req, sizeof(req));
 771
 772         strlcpy(req.backend, lun->l_backend, sizeof(req.backend));
 773         req.reqtype = CTL_LUNREQ_RM;
 774
 775         req.reqdata.rm.lun_id = lun->l_ctl_lun;
 776
 777         if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) {
 778                 log_warn("error issuing CTL_LUN_REQ ioctl");
 779                 return (1);
 780         }
 781
 782         switch (req.status) {
 783         case CTL_LUN_ERROR:
 784                 log_warnx("LUN removal error: %s", req.error_str);
 785                 return (1);
 786         case CTL_LUN_WARNING:
 787                 log_warnx("LUN removal warning: %s", req.error_str);
 788                 break;
 789         case CTL_LUN_OK:
 790                 break;
 791         default:
 792                 log_warnx("unknown LUN removal status: %d", req.status);
 793                 return (1);
 794         }
 795
 796         return (0);
 797 }
 798
 799 void
 800 kernel_handoff(struct connection *conn)
 801 {
 802         struct ctl_iscsi req;
 803
 804         bzero(&req, sizeof(req));
 805
 806         req.type = CTL_ISCSI_HANDOFF;
 807         strlcpy(req.data.handoff.initiator_name,
 808             conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name));
 809         strlcpy(req.data.handoff.initiator_addr,
 810             conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr));
 811         if (conn->conn_initiator_alias != NULL) {
 812                 strlcpy(req.data.handoff.initiator_alias,
 813                     conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias));
 814         }
 815         memcpy(req.data.handoff.initiator_isid, conn->conn_initiator_isid,
 816             sizeof(req.data.handoff.initiator_isid));
 817         strlcpy(req.data.handoff.target_name,
 818             conn->conn_target->t_name, sizeof(req.data.handoff.target_name));
 819 #ifdef ICL_KERNEL_PROXY
 820         if (proxy_mode)
 821                 req.data.handoff.connection_id = conn->conn_socket;
 822         else
 823                 req.data.handoff.socket = conn->conn_socket;
 824 #else
 825         req.data.handoff.socket = conn->conn_socket;
 826 #endif
 827         req.data.handoff.portal_group_tag =
 828             conn->conn_portal->p_portal_group->pg_tag;
 829         if (conn->conn_header_digest == CONN_DIGEST_CRC32C)
 830                 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C;
 831         if (conn->conn_data_digest == CONN_DIGEST_CRC32C)
 832                 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C;
 833         req.data.handoff.cmdsn = conn->conn_cmdsn;
 834         req.data.handoff.statsn = conn->conn_statsn;
 835         req.data.handoff.max_recv_data_segment_length =
 836             conn->conn_max_data_segment_length;
 837         req.data.handoff.max_burst_length = conn->conn_max_burst_length;
 838         req.data.handoff.immediate_data = conn->conn_immediate_data;
 839
 840         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
 841                 log_err(1, "error issuing CTL_ISCSI ioctl; "
 842                     "dropping connection");
 843         }
 844
 845         if (req.status != CTL_ISCSI_OK) {
 846                 log_errx(1, "error returned from CTL iSCSI handoff request: "
 847                     "%s; dropping connection", req.error_str);
 848         }
 849 }
 850
 851 int
 852 kernel_port_add(struct port *port)
 853 {
 854         struct ctl_port_entry entry;
 855         struct ctl_req req;
 856         struct ctl_lun_map lm;
 857         struct target *targ = port->p_target;
 858         struct portal_group *pg = port->p_portal_group;
 859         char tagstr[16];
 860         int error, i, n;
 861
 862         /* Create iSCSI port. */
 863         if (port->p_portal_group) {
 864                 bzero(&req, sizeof(req));
 865                 strlcpy(req.driver, "iscsi", sizeof(req.driver));
 866                 req.reqtype = CTL_REQ_CREATE;
 867                 req.num_args = 5;
 868                 req.args = malloc(req.num_args * sizeof(*req.args));
 869                 if (req.args == NULL)
 870                         log_err(1, "malloc");
 871                 n = 0;
 872                 req.args[n].namelen = sizeof("port_id");
 873                 req.args[n].name = __DECONST(char *, "port_id");
 874                 req.args[n].vallen = sizeof(port->p_ctl_port);
 875                 req.args[n].value = &port->p_ctl_port;
 876                 req.args[n++].flags = CTL_BEARG_WR;
 877                 str_arg(&req.args[n++], "cfiscsi_target", targ->t_name);
 878                 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
 879                 str_arg(&req.args[n++], "cfiscsi_portal_group_tag", tagstr);
 880                 if (targ->t_alias)
 881                         str_arg(&req.args[n++], "cfiscsi_target_alias", targ->t_alias);
 882                 str_arg(&req.args[n++], "ctld_portal_group_name", pg->pg_name);
 883                 req.num_args = n;
 884                 error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
 885                 free(req.args);
 886                 if (error != 0) {
 887                         log_warn("error issuing CTL_PORT_REQ ioctl");
 888                         return (1);
 889                 }
 890                 if (req.status == CTL_LUN_ERROR) {
 891                         log_warnx("error returned from port creation request: %s",
 892                             req.error_str);
 893                         return (1);
 894                 }
 895                 if (req.status != CTL_LUN_OK) {
 896                         log_warnx("unknown port creation request status %d",
 897                             req.status);
 898                         return (1);
 899                 }
 900         } else if (port->p_pport) {
 901                 port->p_ctl_port = port->p_pport->pp_ctl_port;
 902
 903                 if (strncmp(targ->t_name, "naa.", 4) == 0 &&
 904                     strlen(targ->t_name) == 20) {
 905                         bzero(&entry, sizeof(entry));
 906                         entry.port_type = CTL_PORT_NONE;
 907                         entry.targ_port = port->p_ctl_port;
 908                         entry.flags |= CTL_PORT_WWNN_VALID;
 909                         entry.wwnn = strtoull(targ->t_name + 4, NULL, 16);
 910                         if (ioctl(ctl_fd, CTL_SET_PORT_WWNS, &entry) == -1)
 911                                 log_warn("CTL_SET_PORT_WWNS ioctl failed");
 912                 }
 913         }
 914
 915         /* Explicitly enable mapping to block any access except allowed. */
 916         lm.port = port->p_ctl_port;
 917         lm.plun = UINT32_MAX;
 918         lm.lun = 0;
 919         error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 920         if (error != 0)
 921                 log_warn("CTL_LUN_MAP ioctl failed");
 922
 923         /* Map configured LUNs */
 924         for (i = 0; i < MAX_LUNS; i++) {
 925                 if (targ->t_luns[i] == NULL)
 926                         continue;
 927                 lm.port = port->p_ctl_port;
 928                 lm.plun = i;
 929                 lm.lun = targ->t_luns[i]->l_ctl_lun;
 930                 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 931                 if (error != 0)
 932                         log_warn("CTL_LUN_MAP ioctl failed");
 933         }
 934
 935         /* Enable port */
 936         bzero(&entry, sizeof(entry));
 937         entry.targ_port = port->p_ctl_port;
 938         error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry);
 939         if (error != 0) {
 940                 log_warn("CTL_ENABLE_PORT ioctl failed");
 941                 return (-1);
 942         }
 943
 944         return (0);
 945 }
 946
 947 int
 948 kernel_port_update(struct port *port)
 949 {
 950         struct ctl_lun_map lm;
 951         struct target *targ = port->p_target;
 952         int error, i;
 953
 954         /* Map configured LUNs and unmap others */
 955         for (i = 0; i < MAX_LUNS; i++) {
 956                 lm.port = port->p_ctl_port;
 957                 lm.plun = i;
 958                 if (targ->t_luns[i] == NULL)
 959                         lm.lun = UINT32_MAX;
 960                 else
 961                         lm.lun = targ->t_luns[i]->l_ctl_lun;
 962                 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
 963                 if (error != 0)
 964                         log_warn("CTL_LUN_MAP ioctl failed");
 965         }
 966         return (0);
 967 }
 968
 969 int
 970 kernel_port_remove(struct port *port)
 971 {
 972         struct ctl_port_entry entry;
 973         struct ctl_lun_map lm;
 974         struct ctl_req req;
 975         char tagstr[16];
 976         struct target *targ = port->p_target;
 977         struct portal_group *pg = port->p_portal_group;
 978         int error;
 979
 980         /* Disable port */
 981         bzero(&entry, sizeof(entry));
 982         entry.targ_port = port->p_ctl_port;
 983         error = ioctl(ctl_fd, CTL_DISABLE_PORT, &entry);
 984         if (error != 0) {
 985                 log_warn("CTL_DISABLE_PORT ioctl failed");
 986                 return (-1);
 987         }
 988
 989         /* Remove iSCSI port. */
 990         if (port->p_portal_group) {
 991                 bzero(&req, sizeof(req));
 992                 strlcpy(req.driver, "iscsi", sizeof(req.driver));
 993                 req.reqtype = CTL_REQ_REMOVE;
 994                 req.num_args = 2;
 995                 req.args = malloc(req.num_args * sizeof(*req.args));
 996                 if (req.args == NULL)
 997                         log_err(1, "malloc");
 998                 str_arg(&req.args[0], "cfiscsi_target", targ->t_name);
 999                 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag);
1000                 str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr);
1001                 error = ioctl(ctl_fd, CTL_PORT_REQ, &req);
1002                 free(req.args);
1003                 if (error != 0) {
1004                         log_warn("error issuing CTL_PORT_REQ ioctl");
1005                         return (1);
1006                 }
1007                 if (req.status == CTL_LUN_ERROR) {
1008                         log_warnx("error returned from port removal request: %s",
1009                             req.error_str);
1010                         return (1);
1011                 }
1012                 if (req.status != CTL_LUN_OK) {
1013                         log_warnx("unknown port removal request status %d",
1014                             req.status);
1015                         return (1);
1016                 }
1017         } else {
1018                 /* Disable LUN mapping. */
1019                 lm.port = port->p_ctl_port;
1020                 lm.plun = UINT32_MAX;
1021                 lm.lun = UINT32_MAX;
1022                 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm);
1023                 if (error != 0)
1024                         log_warn("CTL_LUN_MAP ioctl failed");
1025         }
1026         return (0);
1027 }
1028
1029 #ifdef ICL_KERNEL_PROXY
1030 void
1031 kernel_listen(struct addrinfo *ai, bool iser, int portal_id)
1032 {
1033         struct ctl_iscsi req;
1034
1035         bzero(&req, sizeof(req));
1036
1037         req.type = CTL_ISCSI_LISTEN;
1038         req.data.listen.iser = iser;
1039         req.data.listen.domain = ai->ai_family;
1040         req.data.listen.socktype = ai->ai_socktype;
1041         req.data.listen.protocol = ai->ai_protocol;
1042         req.data.listen.addr = ai->ai_addr;
1043         req.data.listen.addrlen = ai->ai_addrlen;
1044         req.data.listen.portal_id = portal_id;
1045
1046         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
1047                 log_err(1, "error issuing CTL_ISCSI ioctl");
1048
1049         if (req.status != CTL_ISCSI_OK) {
1050                 log_errx(1, "error returned from CTL iSCSI listen: %s",
1051                     req.error_str);
1052         }
1053 }
1054
1055 void
1056 kernel_accept(int *connection_id, int *portal_id,
1057     struct sockaddr *client_sa, socklen_t *client_salen)
1058 {
1059         struct ctl_iscsi req;
1060         struct sockaddr_storage ss;
1061
1062         bzero(&req, sizeof(req));
1063
1064         req.type = CTL_ISCSI_ACCEPT;
1065         req.data.accept.initiator_addr = (struct sockaddr *)&ss;
1066
1067         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1)
1068                 log_err(1, "error issuing CTL_ISCSI ioctl");
1069
1070         if (req.status != CTL_ISCSI_OK) {
1071                 log_errx(1, "error returned from CTL iSCSI accept: %s",
1072                     req.error_str);
1073         }
1074
1075         *connection_id = req.data.accept.connection_id;
1076         *portal_id = req.data.accept.portal_id;
1077         *client_salen = req.data.accept.initiator_addrlen;
1078         memcpy(client_sa, &ss, *client_salen);
1079 }
1080
1081 void
1082 kernel_send(struct pdu *pdu)
1083 {
1084         struct ctl_iscsi req;
1085
1086         bzero(&req, sizeof(req));
1087
1088         req.type = CTL_ISCSI_SEND;
1089         req.data.send.connection_id = pdu->pdu_connection->conn_socket;
1090         req.data.send.bhs = pdu->pdu_bhs;
1091         req.data.send.data_segment_len = pdu->pdu_data_len;
1092         req.data.send.data_segment = pdu->pdu_data;
1093
1094         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1095                 log_err(1, "error issuing CTL_ISCSI ioctl; "
1096                     "dropping connection");
1097         }
1098
1099         if (req.status != CTL_ISCSI_OK) {
1100                 log_errx(1, "error returned from CTL iSCSI send: "
1101                     "%s; dropping connection", req.error_str);
1102         }
1103 }
1104
1105 void
1106 kernel_receive(struct pdu *pdu)
1107 {
1108         struct ctl_iscsi req;
1109
1110         pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH);
1111         if (pdu->pdu_data == NULL)
1112                 log_err(1, "malloc");
1113
1114         bzero(&req, sizeof(req));
1115
1116         req.type = CTL_ISCSI_RECEIVE;
1117         req.data.receive.connection_id = pdu->pdu_connection->conn_socket;
1118         req.data.receive.bhs = pdu->pdu_bhs;
1119         req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH;
1120         req.data.receive.data_segment = pdu->pdu_data;
1121
1122         if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) {
1123                 log_err(1, "error issuing CTL_ISCSI ioctl; "
1124                     "dropping connection");
1125         }
1126
1127         if (req.status != CTL_ISCSI_OK) {
1128                 log_errx(1, "error returned from CTL iSCSI receive: "
1129                     "%s; dropping connection", req.error_str);
1130         }
1131
1132 }
1133
1134 #endif /* ICL_KERNEL_PROXY */
1135
1136 /*
1137  * XXX: I CANT INTO LATIN
1138  */
1139 void
1140 kernel_capsicate(void)
1141 {
1142         int error;
1143         cap_rights_t rights;
1144         const unsigned long cmds[] = { CTL_ISCSI };
1145
1146         cap_rights_init(&rights, CAP_IOCTL);
1147         error = cap_rights_limit(ctl_fd, &rights);
1148         if (error != 0 && errno != ENOSYS)
1149                 log_err(1, "cap_rights_limit");
1150
1151         error = cap_ioctls_limit(ctl_fd, cmds,
1152             sizeof(cmds) / sizeof(cmds[0]));
1153         if (error != 0 && errno != ENOSYS)
1154                 log_err(1, "cap_ioctls_limit");
1155
1156         error = cap_enter();
1157         if (error != 0 && errno != ENOSYS)
1158                 log_err(1, "cap_enter");
1159
1160         if (cap_sandboxed())
1161                 log_debugx("Capsicum capability mode enabled");
1162         else
1163                 log_warnx("Capsicum capability mode not supported");
1164 }
1165