kernel.c revision 280250
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: stable/10/usr.sbin/ctld/kernel.c 280250 2015-03-19 12:32:48Z rwatson $"); 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 76extern bool proxy_mode; 77 78static int ctl_fd = 0; 79 80void 81kernel_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 */ 101struct cctl_lun_nv { 102 char *name; 103 char *value; 104 STAILQ_ENTRY(cctl_lun_nv) links; 105}; 106 107/* 108 * Backend LUN information. 109 */ 110struct 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 122struct 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 133struct 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 144static void 145cctl_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 190static void 191cctl_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 258static void 259cctl_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 304static void 305cctl_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 369static void 370cctl_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 379struct conf * 380conf_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; 405retry: 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; 454retry_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 615static void 616str_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 626int 627kernel_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 729int 730kernel_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 765int 766kernel_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 799void 800kernel_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 851int 852kernel_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 947int 948kernel_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 969int 970kernel_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 1030void 1031kernel_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 1055void 1056kernel_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 1081void 1082kernel_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 1105void 1106kernel_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 */ 1139void 1140kernel_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 1166