kernel.c revision 279002
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 279002 2015-02-19 14:31:16Z mav $"); 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 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 int cfiscsi_status; 125 char *cfiscsi_target; 126 uint16_t cfiscsi_portal_group_tag; 127 STAILQ_HEAD(,cctl_lun_nv) attr_list; 128 STAILQ_ENTRY(cctl_port) links; 129}; 130 131struct cctl_devlist_data { 132 int num_luns; 133 STAILQ_HEAD(,cctl_lun) lun_list; 134 struct cctl_lun *cur_lun; 135 int num_ports; 136 STAILQ_HEAD(,cctl_port) port_list; 137 struct cctl_port *cur_port; 138 int level; 139 struct sbuf *cur_sb[32]; 140}; 141 142static void 143cctl_start_element(void *user_data, const char *name, const char **attr) 144{ 145 int i; 146 struct cctl_devlist_data *devlist; 147 struct cctl_lun *cur_lun; 148 149 devlist = (struct cctl_devlist_data *)user_data; 150 cur_lun = devlist->cur_lun; 151 devlist->level++; 152 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) / 153 sizeof(devlist->cur_sb[0]))) 154 log_errx(1, "%s: too many nesting levels, %zd max", __func__, 155 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0])); 156 157 devlist->cur_sb[devlist->level] = sbuf_new_auto(); 158 if (devlist->cur_sb[devlist->level] == NULL) 159 log_err(1, "%s: unable to allocate sbuf", __func__); 160 161 if (strcmp(name, "lun") == 0) { 162 if (cur_lun != NULL) 163 log_errx(1, "%s: improper lun element nesting", 164 __func__); 165 166 cur_lun = calloc(1, sizeof(*cur_lun)); 167 if (cur_lun == NULL) 168 log_err(1, "%s: cannot allocate %zd bytes", __func__, 169 sizeof(*cur_lun)); 170 171 devlist->num_luns++; 172 devlist->cur_lun = cur_lun; 173 174 STAILQ_INIT(&cur_lun->attr_list); 175 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links); 176 177 for (i = 0; attr[i] != NULL; i += 2) { 178 if (strcmp(attr[i], "id") == 0) { 179 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0); 180 } else { 181 log_errx(1, "%s: invalid LUN attribute %s = %s", 182 __func__, attr[i], attr[i+1]); 183 } 184 } 185 } 186} 187 188static void 189cctl_end_element(void *user_data, const char *name) 190{ 191 struct cctl_devlist_data *devlist; 192 struct cctl_lun *cur_lun; 193 char *str; 194 195 devlist = (struct cctl_devlist_data *)user_data; 196 cur_lun = devlist->cur_lun; 197 198 if ((cur_lun == NULL) 199 && (strcmp(name, "ctllunlist") != 0)) 200 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name); 201 202 if (devlist->cur_sb[devlist->level] == NULL) 203 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__, 204 devlist->level, name); 205 206 sbuf_finish(devlist->cur_sb[devlist->level]); 207 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level])); 208 209 if (strlen(str) == 0) { 210 free(str); 211 str = NULL; 212 } 213 214 sbuf_delete(devlist->cur_sb[devlist->level]); 215 devlist->cur_sb[devlist->level] = NULL; 216 devlist->level--; 217 218 if (strcmp(name, "backend_type") == 0) { 219 cur_lun->backend_type = str; 220 str = NULL; 221 } else if (strcmp(name, "size") == 0) { 222 cur_lun->size_blocks = strtoull(str, NULL, 0); 223 } else if (strcmp(name, "blocksize") == 0) { 224 cur_lun->blocksize = strtoul(str, NULL, 0); 225 } else if (strcmp(name, "serial_number") == 0) { 226 cur_lun->serial_number = str; 227 str = NULL; 228 } else if (strcmp(name, "device_id") == 0) { 229 cur_lun->device_id = str; 230 str = NULL; 231 } else if (strcmp(name, "ctld_name") == 0) { 232 cur_lun->ctld_name = str; 233 str = NULL; 234 } else if (strcmp(name, "lun") == 0) { 235 devlist->cur_lun = NULL; 236 } else if (strcmp(name, "ctllunlist") == 0) { 237 /* Nothing. */ 238 } else { 239 struct cctl_lun_nv *nv; 240 241 nv = calloc(1, sizeof(*nv)); 242 if (nv == NULL) 243 log_err(1, "%s: can't allocate %zd bytes for nv pair", 244 __func__, sizeof(*nv)); 245 246 nv->name = checked_strdup(name); 247 248 nv->value = str; 249 str = NULL; 250 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links); 251 } 252 253 free(str); 254} 255 256static void 257cctl_start_pelement(void *user_data, const char *name, const char **attr) 258{ 259 int i; 260 struct cctl_devlist_data *devlist; 261 struct cctl_port *cur_port; 262 263 devlist = (struct cctl_devlist_data *)user_data; 264 cur_port = devlist->cur_port; 265 devlist->level++; 266 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) / 267 sizeof(devlist->cur_sb[0]))) 268 log_errx(1, "%s: too many nesting levels, %zd max", __func__, 269 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0])); 270 271 devlist->cur_sb[devlist->level] = sbuf_new_auto(); 272 if (devlist->cur_sb[devlist->level] == NULL) 273 log_err(1, "%s: unable to allocate sbuf", __func__); 274 275 if (strcmp(name, "targ_port") == 0) { 276 if (cur_port != NULL) 277 log_errx(1, "%s: improper port element nesting (%s)", 278 __func__, name); 279 280 cur_port = calloc(1, sizeof(*cur_port)); 281 if (cur_port == NULL) 282 log_err(1, "%s: cannot allocate %zd bytes", __func__, 283 sizeof(*cur_port)); 284 285 devlist->num_ports++; 286 devlist->cur_port = cur_port; 287 288 STAILQ_INIT(&cur_port->attr_list); 289 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links); 290 291 for (i = 0; attr[i] != NULL; i += 2) { 292 if (strcmp(attr[i], "id") == 0) { 293 cur_port->port_id = strtoul(attr[i+1], NULL, 0); 294 } else { 295 log_errx(1, "%s: invalid LUN attribute %s = %s", 296 __func__, attr[i], attr[i+1]); 297 } 298 } 299 } 300} 301 302static void 303cctl_end_pelement(void *user_data, const char *name) 304{ 305 struct cctl_devlist_data *devlist; 306 struct cctl_port *cur_port; 307 char *str; 308 309 devlist = (struct cctl_devlist_data *)user_data; 310 cur_port = devlist->cur_port; 311 312 if ((cur_port == NULL) 313 && (strcmp(name, "ctlportlist") != 0)) 314 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name); 315 316 if (devlist->cur_sb[devlist->level] == NULL) 317 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__, 318 devlist->level, name); 319 320 sbuf_finish(devlist->cur_sb[devlist->level]); 321 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level])); 322 323 if (strlen(str) == 0) { 324 free(str); 325 str = NULL; 326 } 327 328 sbuf_delete(devlist->cur_sb[devlist->level]); 329 devlist->cur_sb[devlist->level] = NULL; 330 devlist->level--; 331 332 if (strcmp(name, "cfiscsi_target") == 0) { 333 cur_port->cfiscsi_target = str; 334 str = NULL; 335 } else if (strcmp(name, "cfiscsi_status") == 0) { 336 cur_port->cfiscsi_status = strtoul(str, NULL, 0); 337 } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) { 338 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0); 339 } else if (strcmp(name, "targ_port") == 0) { 340 devlist->cur_port = NULL; 341 } else if (strcmp(name, "ctlportlist") == 0) { 342 /* Nothing. */ 343 } else { 344 struct cctl_lun_nv *nv; 345 346 nv = calloc(1, sizeof(*nv)); 347 if (nv == NULL) 348 log_err(1, "%s: can't allocate %zd bytes for nv pair", 349 __func__, sizeof(*nv)); 350 351 nv->name = checked_strdup(name); 352 353 nv->value = str; 354 str = NULL; 355 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links); 356 } 357 358 free(str); 359} 360 361static void 362cctl_char_handler(void *user_data, const XML_Char *str, int len) 363{ 364 struct cctl_devlist_data *devlist; 365 366 devlist = (struct cctl_devlist_data *)user_data; 367 368 sbuf_bcat(devlist->cur_sb[devlist->level], str, len); 369} 370 371struct conf * 372conf_new_from_kernel(void) 373{ 374 struct conf *conf = NULL; 375 struct target *targ; 376 struct lun *cl; 377 struct lun_option *lo; 378 struct ctl_lun_list list; 379 struct cctl_devlist_data devlist; 380 struct cctl_lun *lun; 381 struct cctl_port *port; 382 XML_Parser parser; 383 char *str; 384 int len, retval; 385 386 bzero(&devlist, sizeof(devlist)); 387 STAILQ_INIT(&devlist.lun_list); 388 STAILQ_INIT(&devlist.port_list); 389 390 log_debugx("obtaining previously configured CTL luns from the kernel"); 391 392 str = NULL; 393 len = 4096; 394retry: 395 str = realloc(str, len); 396 if (str == NULL) 397 log_err(1, "realloc"); 398 399 bzero(&list, sizeof(list)); 400 list.alloc_len = len; 401 list.status = CTL_LUN_LIST_NONE; 402 list.lun_xml = str; 403 404 if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) { 405 log_warn("error issuing CTL_LUN_LIST ioctl"); 406 free(str); 407 return (NULL); 408 } 409 410 if (list.status == CTL_LUN_LIST_ERROR) { 411 log_warnx("error returned from CTL_LUN_LIST ioctl: %s", 412 list.error_str); 413 free(str); 414 return (NULL); 415 } 416 417 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) { 418 len = len << 1; 419 goto retry; 420 } 421 422 parser = XML_ParserCreate(NULL); 423 if (parser == NULL) { 424 log_warnx("unable to create XML parser"); 425 free(str); 426 return (NULL); 427 } 428 429 XML_SetUserData(parser, &devlist); 430 XML_SetElementHandler(parser, cctl_start_element, cctl_end_element); 431 XML_SetCharacterDataHandler(parser, cctl_char_handler); 432 433 retval = XML_Parse(parser, str, strlen(str), 1); 434 XML_ParserFree(parser); 435 free(str); 436 if (retval != 1) { 437 log_warnx("XML_Parse failed"); 438 return (NULL); 439 } 440 441 str = NULL; 442 len = 4096; 443retry_port: 444 str = realloc(str, len); 445 if (str == NULL) 446 log_err(1, "realloc"); 447 448 bzero(&list, sizeof(list)); 449 list.alloc_len = len; 450 list.status = CTL_LUN_LIST_NONE; 451 list.lun_xml = str; 452 453 if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) { 454 log_warn("error issuing CTL_PORT_LIST ioctl"); 455 free(str); 456 return (NULL); 457 } 458 459 if (list.status == CTL_PORT_LIST_ERROR) { 460 log_warnx("error returned from CTL_PORT_LIST ioctl: %s", 461 list.error_str); 462 free(str); 463 return (NULL); 464 } 465 466 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) { 467 len = len << 1; 468 goto retry_port; 469 } 470 471 parser = XML_ParserCreate(NULL); 472 if (parser == NULL) { 473 log_warnx("unable to create XML parser"); 474 free(str); 475 return (NULL); 476 } 477 478 XML_SetUserData(parser, &devlist); 479 XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement); 480 XML_SetCharacterDataHandler(parser, cctl_char_handler); 481 482 retval = XML_Parse(parser, str, strlen(str), 1); 483 XML_ParserFree(parser); 484 free(str); 485 if (retval != 1) { 486 log_warnx("XML_Parse failed"); 487 return (NULL); 488 } 489 490 conf = conf_new(); 491 492 STAILQ_FOREACH(port, &devlist.port_list, links) { 493 494 if (port->cfiscsi_target == NULL) { 495 log_debugx("CTL port %ju wasn't managed by ctld; " 496 "ignoring", (uintmax_t)port->port_id); 497 continue; 498 } 499 if (port->cfiscsi_status != 1) { 500 log_debugx("CTL port %ju is not active (%d); ignoring", 501 (uintmax_t)port->port_id, port->cfiscsi_status); 502 continue; 503 } 504 505 targ = target_find(conf, port->cfiscsi_target); 506 if (targ == NULL) { 507#if 0 508 log_debugx("found new kernel target %s for CTL port %ld", 509 port->cfiscsi_target, port->port_id); 510#endif 511 targ = target_new(conf, port->cfiscsi_target); 512 if (targ == NULL) { 513 log_warnx("target_new failed"); 514 continue; 515 } 516 } 517 } 518 519 STAILQ_FOREACH(lun, &devlist.lun_list, links) { 520 struct cctl_lun_nv *nv; 521 522 if (lun->ctld_name == NULL) { 523 log_debugx("CTL lun %ju wasn't managed by ctld; " 524 "ignoring", (uintmax_t)lun->lun_id); 525 continue; 526 } 527 528 cl = lun_find(conf, lun->ctld_name); 529 if (cl != NULL) { 530 log_warnx("found CTL lun %ju \"%s\", " 531 "also backed by CTL lun %d; ignoring", 532 (uintmax_t)lun->lun_id, lun->ctld_name, 533 cl->l_ctl_lun); 534 continue; 535 } 536 537 log_debugx("found CTL lun %ju \"%s\"", 538 (uintmax_t)lun->lun_id, lun->ctld_name); 539 540 cl = lun_new(conf, lun->ctld_name); 541 if (cl == NULL) { 542 log_warnx("lun_new failed"); 543 continue; 544 } 545 lun_set_backend(cl, lun->backend_type); 546 lun_set_blocksize(cl, lun->blocksize); 547 lun_set_device_id(cl, lun->device_id); 548 lun_set_serial(cl, lun->serial_number); 549 lun_set_size(cl, lun->size_blocks * cl->l_blocksize); 550 lun_set_ctl_lun(cl, lun->lun_id); 551 552 STAILQ_FOREACH(nv, &lun->attr_list, links) { 553 if (strcmp(nv->name, "file") == 0 || 554 strcmp(nv->name, "dev") == 0) { 555 lun_set_path(cl, nv->value); 556 continue; 557 } 558 lo = lun_option_new(cl, nv->name, nv->value); 559 if (lo == NULL) 560 log_warnx("unable to add CTL lun option %s " 561 "for CTL lun %ju \"%s\"", 562 nv->name, (uintmax_t) lun->lun_id, 563 cl->l_name); 564 } 565 } 566 567 return (conf); 568} 569 570static void 571str_arg(struct ctl_be_arg *arg, const char *name, const char *value) 572{ 573 574 arg->namelen = strlen(name) + 1; 575 arg->name = __DECONST(char *, name); 576 arg->vallen = strlen(value) + 1; 577 arg->value = __DECONST(char *, value); 578 arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD; 579} 580 581int 582kernel_lun_add(struct lun *lun) 583{ 584 struct lun_option *lo; 585 struct ctl_lun_req req; 586 int error, i, num_options; 587 588 bzero(&req, sizeof(req)); 589 590 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 591 req.reqtype = CTL_LUNREQ_CREATE; 592 593 req.reqdata.create.blocksize_bytes = lun->l_blocksize; 594 595 if (lun->l_size != 0) 596 req.reqdata.create.lun_size_bytes = lun->l_size; 597 598 req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE; 599 req.reqdata.create.device_type = T_DIRECT; 600 601 if (lun->l_serial != NULL) { 602 strncpy(req.reqdata.create.serial_num, lun->l_serial, 603 sizeof(req.reqdata.create.serial_num)); 604 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM; 605 } 606 607 if (lun->l_device_id != NULL) { 608 strncpy(req.reqdata.create.device_id, lun->l_device_id, 609 sizeof(req.reqdata.create.device_id)); 610 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID; 611 } 612 613 if (lun->l_path != NULL) { 614 lo = lun_option_find(lun, "file"); 615 if (lo != NULL) { 616 lun_option_set(lo, lun->l_path); 617 } else { 618 lo = lun_option_new(lun, "file", lun->l_path); 619 assert(lo != NULL); 620 } 621 } 622 623 lo = lun_option_find(lun, "ctld_name"); 624 if (lo != NULL) { 625 lun_option_set(lo, lun->l_name); 626 } else { 627 lo = lun_option_new(lun, "ctld_name", lun->l_name); 628 assert(lo != NULL); 629 } 630 631 lo = lun_option_find(lun, "scsiname"); 632 if (lo == NULL && lun->l_scsiname != NULL) { 633 lo = lun_option_new(lun, "scsiname", lun->l_scsiname); 634 assert(lo != NULL); 635 } 636 637 num_options = 0; 638 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 639 num_options++; 640 641 req.num_be_args = num_options; 642 if (num_options > 0) { 643 req.be_args = malloc(num_options * sizeof(*req.be_args)); 644 if (req.be_args == NULL) { 645 log_warn("error allocating %zd bytes", 646 num_options * sizeof(*req.be_args)); 647 return (1); 648 } 649 650 i = 0; 651 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 652 str_arg(&req.be_args[i], lo->lo_name, lo->lo_value); 653 i++; 654 } 655 assert(i == num_options); 656 } 657 658 error = ioctl(ctl_fd, CTL_LUN_REQ, &req); 659 free(req.be_args); 660 if (error != 0) { 661 log_warn("error issuing CTL_LUN_REQ ioctl"); 662 return (1); 663 } 664 665 switch (req.status) { 666 case CTL_LUN_ERROR: 667 log_warnx("LUN creation error: %s", req.error_str); 668 return (1); 669 case CTL_LUN_WARNING: 670 log_warnx("LUN creation warning: %s", req.error_str); 671 break; 672 case CTL_LUN_OK: 673 break; 674 default: 675 log_warnx("unknown LUN creation status: %d", 676 req.status); 677 return (1); 678 } 679 680 lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id); 681 return (0); 682} 683 684int 685kernel_lun_resize(struct lun *lun) 686{ 687 struct ctl_lun_req req; 688 689 bzero(&req, sizeof(req)); 690 691 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 692 req.reqtype = CTL_LUNREQ_MODIFY; 693 694 req.reqdata.modify.lun_id = lun->l_ctl_lun; 695 req.reqdata.modify.lun_size_bytes = lun->l_size; 696 697 if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) { 698 log_warn("error issuing CTL_LUN_REQ ioctl"); 699 return (1); 700 } 701 702 switch (req.status) { 703 case CTL_LUN_ERROR: 704 log_warnx("LUN modification error: %s", req.error_str); 705 return (1); 706 case CTL_LUN_WARNING: 707 log_warnx("LUN modification warning: %s", req.error_str); 708 break; 709 case CTL_LUN_OK: 710 break; 711 default: 712 log_warnx("unknown LUN modification status: %d", 713 req.status); 714 return (1); 715 } 716 717 return (0); 718} 719 720int 721kernel_lun_remove(struct lun *lun) 722{ 723 struct ctl_lun_req req; 724 725 bzero(&req, sizeof(req)); 726 727 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 728 req.reqtype = CTL_LUNREQ_RM; 729 730 req.reqdata.rm.lun_id = lun->l_ctl_lun; 731 732 if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) { 733 log_warn("error issuing CTL_LUN_REQ ioctl"); 734 return (1); 735 } 736 737 switch (req.status) { 738 case CTL_LUN_ERROR: 739 log_warnx("LUN removal error: %s", req.error_str); 740 return (1); 741 case CTL_LUN_WARNING: 742 log_warnx("LUN removal warning: %s", req.error_str); 743 break; 744 case CTL_LUN_OK: 745 break; 746 default: 747 log_warnx("unknown LUN removal status: %d", req.status); 748 return (1); 749 } 750 751 return (0); 752} 753 754void 755kernel_handoff(struct connection *conn) 756{ 757 struct ctl_iscsi req; 758 759 bzero(&req, sizeof(req)); 760 761 req.type = CTL_ISCSI_HANDOFF; 762 strlcpy(req.data.handoff.initiator_name, 763 conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name)); 764 strlcpy(req.data.handoff.initiator_addr, 765 conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr)); 766 if (conn->conn_initiator_alias != NULL) { 767 strlcpy(req.data.handoff.initiator_alias, 768 conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias)); 769 } 770 memcpy(req.data.handoff.initiator_isid, conn->conn_initiator_isid, 771 sizeof(req.data.handoff.initiator_isid)); 772 strlcpy(req.data.handoff.target_name, 773 conn->conn_target->t_name, sizeof(req.data.handoff.target_name)); 774#ifdef ICL_KERNEL_PROXY 775 if (proxy_mode) 776 req.data.handoff.connection_id = conn->conn_socket; 777 else 778 req.data.handoff.socket = conn->conn_socket; 779#else 780 req.data.handoff.socket = conn->conn_socket; 781#endif 782 req.data.handoff.portal_group_tag = 783 conn->conn_portal->p_portal_group->pg_tag; 784 if (conn->conn_header_digest == CONN_DIGEST_CRC32C) 785 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C; 786 if (conn->conn_data_digest == CONN_DIGEST_CRC32C) 787 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C; 788 req.data.handoff.cmdsn = conn->conn_cmdsn; 789 req.data.handoff.statsn = conn->conn_statsn; 790 req.data.handoff.max_recv_data_segment_length = 791 conn->conn_max_data_segment_length; 792 req.data.handoff.max_burst_length = conn->conn_max_burst_length; 793 req.data.handoff.immediate_data = conn->conn_immediate_data; 794 795 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 796 log_err(1, "error issuing CTL_ISCSI ioctl; " 797 "dropping connection"); 798 } 799 800 if (req.status != CTL_ISCSI_OK) { 801 log_errx(1, "error returned from CTL iSCSI handoff request: " 802 "%s; dropping connection", req.error_str); 803 } 804} 805 806int 807kernel_port_add(struct target *targ) 808{ 809 struct ctl_port_entry entry; 810 struct ctl_req req; 811 struct ctl_lun_map lm; 812 char tagstr[16]; 813 int error, i; 814 815 /* Create iSCSI port. */ 816 bzero(&req, sizeof(req)); 817 strlcpy(req.driver, "iscsi", sizeof(req.driver)); 818 req.reqtype = CTL_REQ_CREATE; 819 req.num_args = 4; 820 req.args = malloc(req.num_args * sizeof(*req.args)); 821 req.args[0].namelen = sizeof("port_id"); 822 req.args[0].name = __DECONST(char *, "port_id"); 823 req.args[0].vallen = sizeof(targ->t_ctl_port); 824 req.args[0].value = &targ->t_ctl_port; 825 req.args[0].flags = CTL_BEARG_WR; 826 str_arg(&req.args[1], "cfiscsi_target", targ->t_name); 827 snprintf(tagstr, sizeof(tagstr), "%d", targ->t_portal_group->pg_tag); 828 str_arg(&req.args[2], "cfiscsi_portal_group_tag", tagstr); 829 if (targ->t_alias) 830 str_arg(&req.args[3], "cfiscsi_target_alias", targ->t_alias); 831 else 832 req.num_args--; 833 error = ioctl(ctl_fd, CTL_PORT_REQ, &req); 834 free(req.args); 835 if (error != 0) { 836 log_warn("error issuing CTL_PORT_REQ ioctl"); 837 return (1); 838 } 839 if (req.status == CTL_LUN_ERROR) { 840 log_warnx("error returned from port creation request: %s", 841 req.error_str); 842 return (1); 843 } 844 if (req.status != CTL_LUN_OK) { 845 log_warnx("unknown port creation request status %d", 846 req.status); 847 return (1); 848 } 849 850 /* Explicitly enable mapping to block any access except allowed. */ 851 lm.port = targ->t_ctl_port; 852 lm.plun = UINT32_MAX; 853 lm.lun = 0; 854 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 855 if (error != 0) 856 log_warn("CTL_LUN_MAP ioctl failed"); 857 858 /* Map configured LUNs */ 859 for (i = 0; i < MAX_LUNS; i++) { 860 if (targ->t_luns[i] == NULL) 861 continue; 862 lm.port = targ->t_ctl_port; 863 lm.plun = i; 864 lm.lun = targ->t_luns[i]->l_ctl_lun; 865 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 866 if (error != 0) 867 log_warn("CTL_LUN_MAP ioctl failed"); 868 } 869 870 /* Enable port */ 871 bzero(&entry, sizeof(entry)); 872 entry.targ_port = targ->t_ctl_port; 873 error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry); 874 if (error != 0) { 875 log_warn("CTL_ENABLE_PORT ioctl failed"); 876 return (-1); 877 } 878 879 return (0); 880} 881 882int 883kernel_port_update(struct target *targ) 884{ 885 struct ctl_lun_map lm; 886 int error, i; 887 888 /* Map configured LUNs and unmap others */ 889 for (i = 0; i < MAX_LUNS; i++) { 890 lm.port = targ->t_ctl_port; 891 lm.plun = i; 892 if (targ->t_luns[i] == NULL) 893 lm.lun = UINT32_MAX; 894 else 895 lm.lun = targ->t_luns[i]->l_ctl_lun; 896 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 897 if (error != 0) 898 log_warn("CTL_LUN_MAP ioctl failed"); 899 } 900 return (0); 901} 902 903int 904kernel_port_remove(struct target *targ) 905{ 906 struct ctl_req req; 907 char tagstr[16]; 908 int error; 909 910 bzero(&req, sizeof(req)); 911 strlcpy(req.driver, "iscsi", sizeof(req.driver)); 912 req.reqtype = CTL_REQ_REMOVE; 913 req.num_args = 2; 914 req.args = malloc(req.num_args * sizeof(*req.args)); 915 str_arg(&req.args[0], "cfiscsi_target", targ->t_name); 916 if (targ->t_portal_group) { 917 snprintf(tagstr, sizeof(tagstr), "%d", 918 targ->t_portal_group->pg_tag); 919 str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr); 920 } else 921 req.num_args--; 922 923 error = ioctl(ctl_fd, CTL_PORT_REQ, &req); 924 free(req.args); 925 if (error != 0) { 926 log_warn("error issuing CTL_PORT_REQ ioctl"); 927 return (1); 928 } 929 930 if (req.status == CTL_LUN_ERROR) { 931 log_warnx("error returned from port removal request: %s", 932 req.error_str); 933 return (1); 934 } 935 936 if (req.status != CTL_LUN_OK) { 937 log_warnx("unknown port removal request status %d", 938 req.status); 939 return (1); 940 } 941 942 return (0); 943} 944 945#ifdef ICL_KERNEL_PROXY 946void 947kernel_listen(struct addrinfo *ai, bool iser, int portal_id) 948{ 949 struct ctl_iscsi req; 950 951 bzero(&req, sizeof(req)); 952 953 req.type = CTL_ISCSI_LISTEN; 954 req.data.listen.iser = iser; 955 req.data.listen.domain = ai->ai_family; 956 req.data.listen.socktype = ai->ai_socktype; 957 req.data.listen.protocol = ai->ai_protocol; 958 req.data.listen.addr = ai->ai_addr; 959 req.data.listen.addrlen = ai->ai_addrlen; 960 req.data.listen.portal_id = portal_id; 961 962 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) 963 log_err(1, "error issuing CTL_ISCSI ioctl"); 964 965 if (req.status != CTL_ISCSI_OK) { 966 log_errx(1, "error returned from CTL iSCSI listen: %s", 967 req.error_str); 968 } 969} 970 971void 972kernel_accept(int *connection_id, int *portal_id, 973 struct sockaddr *client_sa, socklen_t *client_salen) 974{ 975 struct ctl_iscsi req; 976 struct sockaddr_storage ss; 977 978 bzero(&req, sizeof(req)); 979 980 req.type = CTL_ISCSI_ACCEPT; 981 req.data.accept.initiator_addr = (struct sockaddr *)&ss; 982 983 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) 984 log_err(1, "error issuing CTL_ISCSI ioctl"); 985 986 if (req.status != CTL_ISCSI_OK) { 987 log_errx(1, "error returned from CTL iSCSI accept: %s", 988 req.error_str); 989 } 990 991 *connection_id = req.data.accept.connection_id; 992 *portal_id = req.data.accept.portal_id; 993 *client_salen = req.data.accept.initiator_addrlen; 994 memcpy(client_sa, &ss, *client_salen); 995} 996 997void 998kernel_send(struct pdu *pdu) 999{ 1000 struct ctl_iscsi req; 1001 1002 bzero(&req, sizeof(req)); 1003 1004 req.type = CTL_ISCSI_SEND; 1005 req.data.send.connection_id = pdu->pdu_connection->conn_socket; 1006 req.data.send.bhs = pdu->pdu_bhs; 1007 req.data.send.data_segment_len = pdu->pdu_data_len; 1008 req.data.send.data_segment = pdu->pdu_data; 1009 1010 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 1011 log_err(1, "error issuing CTL_ISCSI ioctl; " 1012 "dropping connection"); 1013 } 1014 1015 if (req.status != CTL_ISCSI_OK) { 1016 log_errx(1, "error returned from CTL iSCSI send: " 1017 "%s; dropping connection", req.error_str); 1018 } 1019} 1020 1021void 1022kernel_receive(struct pdu *pdu) 1023{ 1024 struct ctl_iscsi req; 1025 1026 pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH); 1027 if (pdu->pdu_data == NULL) 1028 log_err(1, "malloc"); 1029 1030 bzero(&req, sizeof(req)); 1031 1032 req.type = CTL_ISCSI_RECEIVE; 1033 req.data.receive.connection_id = pdu->pdu_connection->conn_socket; 1034 req.data.receive.bhs = pdu->pdu_bhs; 1035 req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH; 1036 req.data.receive.data_segment = pdu->pdu_data; 1037 1038 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 1039 log_err(1, "error issuing CTL_ISCSI ioctl; " 1040 "dropping connection"); 1041 } 1042 1043 if (req.status != CTL_ISCSI_OK) { 1044 log_errx(1, "error returned from CTL iSCSI receive: " 1045 "%s; dropping connection", req.error_str); 1046 } 1047 1048} 1049 1050#endif /* ICL_KERNEL_PROXY */ 1051 1052/* 1053 * XXX: I CANT INTO LATIN 1054 */ 1055void 1056kernel_capsicate(void) 1057{ 1058 int error; 1059 cap_rights_t rights; 1060 const unsigned long cmds[] = { CTL_ISCSI }; 1061 1062 cap_rights_init(&rights, CAP_IOCTL); 1063 error = cap_rights_limit(ctl_fd, &rights); 1064 if (error != 0 && errno != ENOSYS) 1065 log_err(1, "cap_rights_limit"); 1066 1067 error = cap_ioctls_limit(ctl_fd, cmds, 1068 sizeof(cmds) / sizeof(cmds[0])); 1069 if (error != 0 && errno != ENOSYS) 1070 log_err(1, "cap_ioctls_limit"); 1071 1072 error = cap_enter(); 1073 if (error != 0 && errno != ENOSYS) 1074 log_err(1, "cap_enter"); 1075 1076 if (cap_sandboxed()) 1077 log_debugx("Capsicum capability mode enabled"); 1078 else 1079 log_warnx("Capsicum capability mode not supported"); 1080} 1081 1082