kernel.c revision 278331
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: head/usr.sbin/ctld/kernel.c 278331 2015-02-06 21:03:25Z trasz $"); 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 int cfiscsi_state; 125 char *cfiscsi_target; 126 uint16_t cfiscsi_portal_group_tag; 127 char *ctld_portal_group_name; 128 STAILQ_HEAD(,cctl_lun_nv) attr_list; 129 STAILQ_ENTRY(cctl_port) links; 130}; 131 132struct cctl_devlist_data { 133 int num_luns; 134 STAILQ_HEAD(,cctl_lun) lun_list; 135 struct cctl_lun *cur_lun; 136 int num_ports; 137 STAILQ_HEAD(,cctl_port) port_list; 138 struct cctl_port *cur_port; 139 int level; 140 struct sbuf *cur_sb[32]; 141}; 142 143static void 144cctl_start_element(void *user_data, const char *name, const char **attr) 145{ 146 int i; 147 struct cctl_devlist_data *devlist; 148 struct cctl_lun *cur_lun; 149 150 devlist = (struct cctl_devlist_data *)user_data; 151 cur_lun = devlist->cur_lun; 152 devlist->level++; 153 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) / 154 sizeof(devlist->cur_sb[0]))) 155 log_errx(1, "%s: too many nesting levels, %zd max", __func__, 156 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0])); 157 158 devlist->cur_sb[devlist->level] = sbuf_new_auto(); 159 if (devlist->cur_sb[devlist->level] == NULL) 160 log_err(1, "%s: unable to allocate sbuf", __func__); 161 162 if (strcmp(name, "lun") == 0) { 163 if (cur_lun != NULL) 164 log_errx(1, "%s: improper lun element nesting", 165 __func__); 166 167 cur_lun = calloc(1, sizeof(*cur_lun)); 168 if (cur_lun == NULL) 169 log_err(1, "%s: cannot allocate %zd bytes", __func__, 170 sizeof(*cur_lun)); 171 172 devlist->num_luns++; 173 devlist->cur_lun = cur_lun; 174 175 STAILQ_INIT(&cur_lun->attr_list); 176 STAILQ_INSERT_TAIL(&devlist->lun_list, cur_lun, links); 177 178 for (i = 0; attr[i] != NULL; i += 2) { 179 if (strcmp(attr[i], "id") == 0) { 180 cur_lun->lun_id = strtoull(attr[i+1], NULL, 0); 181 } else { 182 log_errx(1, "%s: invalid LUN attribute %s = %s", 183 __func__, attr[i], attr[i+1]); 184 } 185 } 186 } 187} 188 189static void 190cctl_end_element(void *user_data, const char *name) 191{ 192 struct cctl_devlist_data *devlist; 193 struct cctl_lun *cur_lun; 194 char *str; 195 196 devlist = (struct cctl_devlist_data *)user_data; 197 cur_lun = devlist->cur_lun; 198 199 if ((cur_lun == NULL) 200 && (strcmp(name, "ctllunlist") != 0)) 201 log_errx(1, "%s: cur_lun == NULL! (name = %s)", __func__, name); 202 203 if (devlist->cur_sb[devlist->level] == NULL) 204 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__, 205 devlist->level, name); 206 207 sbuf_finish(devlist->cur_sb[devlist->level]); 208 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level])); 209 210 if (strlen(str) == 0) { 211 free(str); 212 str = NULL; 213 } 214 215 sbuf_delete(devlist->cur_sb[devlist->level]); 216 devlist->cur_sb[devlist->level] = NULL; 217 devlist->level--; 218 219 if (strcmp(name, "backend_type") == 0) { 220 cur_lun->backend_type = str; 221 str = NULL; 222 } else if (strcmp(name, "size") == 0) { 223 cur_lun->size_blocks = strtoull(str, NULL, 0); 224 } else if (strcmp(name, "blocksize") == 0) { 225 cur_lun->blocksize = strtoul(str, NULL, 0); 226 } else if (strcmp(name, "serial_number") == 0) { 227 cur_lun->serial_number = str; 228 str = NULL; 229 } else if (strcmp(name, "device_id") == 0) { 230 cur_lun->device_id = str; 231 str = NULL; 232 } else if (strcmp(name, "ctld_name") == 0) { 233 cur_lun->ctld_name = str; 234 str = NULL; 235 } else if (strcmp(name, "lun") == 0) { 236 devlist->cur_lun = NULL; 237 } else if (strcmp(name, "ctllunlist") == 0) { 238 /* Nothing. */ 239 } else { 240 struct cctl_lun_nv *nv; 241 242 nv = calloc(1, sizeof(*nv)); 243 if (nv == NULL) 244 log_err(1, "%s: can't allocate %zd bytes for nv pair", 245 __func__, sizeof(*nv)); 246 247 nv->name = checked_strdup(name); 248 249 nv->value = str; 250 str = NULL; 251 STAILQ_INSERT_TAIL(&cur_lun->attr_list, nv, links); 252 } 253 254 free(str); 255} 256 257static void 258cctl_start_pelement(void *user_data, const char *name, const char **attr) 259{ 260 int i; 261 struct cctl_devlist_data *devlist; 262 struct cctl_port *cur_port; 263 264 devlist = (struct cctl_devlist_data *)user_data; 265 cur_port = devlist->cur_port; 266 devlist->level++; 267 if ((u_int)devlist->level >= (sizeof(devlist->cur_sb) / 268 sizeof(devlist->cur_sb[0]))) 269 log_errx(1, "%s: too many nesting levels, %zd max", __func__, 270 sizeof(devlist->cur_sb) / sizeof(devlist->cur_sb[0])); 271 272 devlist->cur_sb[devlist->level] = sbuf_new_auto(); 273 if (devlist->cur_sb[devlist->level] == NULL) 274 log_err(1, "%s: unable to allocate sbuf", __func__); 275 276 if (strcmp(name, "targ_port") == 0) { 277 if (cur_port != NULL) 278 log_errx(1, "%s: improper port element nesting (%s)", 279 __func__, name); 280 281 cur_port = calloc(1, sizeof(*cur_port)); 282 if (cur_port == NULL) 283 log_err(1, "%s: cannot allocate %zd bytes", __func__, 284 sizeof(*cur_port)); 285 286 devlist->num_ports++; 287 devlist->cur_port = cur_port; 288 289 STAILQ_INIT(&cur_port->attr_list); 290 STAILQ_INSERT_TAIL(&devlist->port_list, cur_port, links); 291 292 for (i = 0; attr[i] != NULL; i += 2) { 293 if (strcmp(attr[i], "id") == 0) { 294 cur_port->port_id = strtoul(attr[i+1], NULL, 0); 295 } else { 296 log_errx(1, "%s: invalid LUN attribute %s = %s", 297 __func__, attr[i], attr[i+1]); 298 } 299 } 300 } 301} 302 303static void 304cctl_end_pelement(void *user_data, const char *name) 305{ 306 struct cctl_devlist_data *devlist; 307 struct cctl_port *cur_port; 308 char *str; 309 310 devlist = (struct cctl_devlist_data *)user_data; 311 cur_port = devlist->cur_port; 312 313 if ((cur_port == NULL) 314 && (strcmp(name, "ctlportlist") != 0)) 315 log_errx(1, "%s: cur_port == NULL! (name = %s)", __func__, name); 316 317 if (devlist->cur_sb[devlist->level] == NULL) 318 log_errx(1, "%s: no valid sbuf at level %d (name %s)", __func__, 319 devlist->level, name); 320 321 sbuf_finish(devlist->cur_sb[devlist->level]); 322 str = checked_strdup(sbuf_data(devlist->cur_sb[devlist->level])); 323 324 if (strlen(str) == 0) { 325 free(str); 326 str = NULL; 327 } 328 329 sbuf_delete(devlist->cur_sb[devlist->level]); 330 devlist->cur_sb[devlist->level] = NULL; 331 devlist->level--; 332 333 if (strcmp(name, "cfiscsi_target") == 0) { 334 cur_port->cfiscsi_target = str; 335 str = NULL; 336 } else if (strcmp(name, "cfiscsi_state") == 0) { 337 cur_port->cfiscsi_state = strtoul(str, NULL, 0); 338 } else if (strcmp(name, "cfiscsi_portal_group_tag") == 0) { 339 cur_port->cfiscsi_portal_group_tag = strtoul(str, NULL, 0); 340 } else if (strcmp(name, "ctld_portal_group_name") == 0) { 341 cur_port->ctld_portal_group_name = str; 342 str = NULL; 343 } else if (strcmp(name, "targ_port") == 0) { 344 devlist->cur_port = NULL; 345 } else if (strcmp(name, "ctlportlist") == 0) { 346 /* Nothing. */ 347 } else { 348 struct cctl_lun_nv *nv; 349 350 nv = calloc(1, sizeof(*nv)); 351 if (nv == NULL) 352 log_err(1, "%s: can't allocate %zd bytes for nv pair", 353 __func__, sizeof(*nv)); 354 355 nv->name = checked_strdup(name); 356 357 nv->value = str; 358 str = NULL; 359 STAILQ_INSERT_TAIL(&cur_port->attr_list, nv, links); 360 } 361 362 free(str); 363} 364 365static void 366cctl_char_handler(void *user_data, const XML_Char *str, int len) 367{ 368 struct cctl_devlist_data *devlist; 369 370 devlist = (struct cctl_devlist_data *)user_data; 371 372 sbuf_bcat(devlist->cur_sb[devlist->level], str, len); 373} 374 375struct conf * 376conf_new_from_kernel(void) 377{ 378 struct conf *conf = NULL; 379 struct target *targ; 380 struct portal_group *pg; 381 struct port *cp; 382 struct lun *cl; 383 struct lun_option *lo; 384 struct ctl_lun_list list; 385 struct cctl_devlist_data devlist; 386 struct cctl_lun *lun; 387 struct cctl_port *port; 388 XML_Parser parser; 389 char *str; 390 int len, retval; 391 392 bzero(&devlist, sizeof(devlist)); 393 STAILQ_INIT(&devlist.lun_list); 394 STAILQ_INIT(&devlist.port_list); 395 396 log_debugx("obtaining previously configured CTL luns from the kernel"); 397 398 str = NULL; 399 len = 4096; 400retry: 401 str = realloc(str, len); 402 if (str == NULL) 403 log_err(1, "realloc"); 404 405 bzero(&list, sizeof(list)); 406 list.alloc_len = len; 407 list.status = CTL_LUN_LIST_NONE; 408 list.lun_xml = str; 409 410 if (ioctl(ctl_fd, CTL_LUN_LIST, &list) == -1) { 411 log_warn("error issuing CTL_LUN_LIST ioctl"); 412 free(str); 413 return (NULL); 414 } 415 416 if (list.status == CTL_LUN_LIST_ERROR) { 417 log_warnx("error returned from CTL_LUN_LIST ioctl: %s", 418 list.error_str); 419 free(str); 420 return (NULL); 421 } 422 423 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) { 424 len = len << 1; 425 goto retry; 426 } 427 428 parser = XML_ParserCreate(NULL); 429 if (parser == NULL) { 430 log_warnx("unable to create XML parser"); 431 free(str); 432 return (NULL); 433 } 434 435 XML_SetUserData(parser, &devlist); 436 XML_SetElementHandler(parser, cctl_start_element, cctl_end_element); 437 XML_SetCharacterDataHandler(parser, cctl_char_handler); 438 439 retval = XML_Parse(parser, str, strlen(str), 1); 440 XML_ParserFree(parser); 441 free(str); 442 if (retval != 1) { 443 log_warnx("XML_Parse failed"); 444 return (NULL); 445 } 446 447 str = NULL; 448 len = 4096; 449retry_port: 450 str = realloc(str, len); 451 if (str == NULL) 452 log_err(1, "realloc"); 453 454 bzero(&list, sizeof(list)); 455 list.alloc_len = len; 456 list.status = CTL_LUN_LIST_NONE; 457 list.lun_xml = str; 458 459 if (ioctl(ctl_fd, CTL_PORT_LIST, &list) == -1) { 460 log_warn("error issuing CTL_PORT_LIST ioctl"); 461 free(str); 462 return (NULL); 463 } 464 465 if (list.status == CTL_PORT_LIST_ERROR) { 466 log_warnx("error returned from CTL_PORT_LIST ioctl: %s", 467 list.error_str); 468 free(str); 469 return (NULL); 470 } 471 472 if (list.status == CTL_LUN_LIST_NEED_MORE_SPACE) { 473 len = len << 1; 474 goto retry_port; 475 } 476 477 parser = XML_ParserCreate(NULL); 478 if (parser == NULL) { 479 log_warnx("unable to create XML parser"); 480 free(str); 481 return (NULL); 482 } 483 484 XML_SetUserData(parser, &devlist); 485 XML_SetElementHandler(parser, cctl_start_pelement, cctl_end_pelement); 486 XML_SetCharacterDataHandler(parser, cctl_char_handler); 487 488 retval = XML_Parse(parser, str, strlen(str), 1); 489 XML_ParserFree(parser); 490 free(str); 491 if (retval != 1) { 492 log_warnx("XML_Parse failed"); 493 return (NULL); 494 } 495 496 conf = conf_new(); 497 498 STAILQ_FOREACH(port, &devlist.port_list, links) { 499 500 if (port->cfiscsi_target == NULL) { 501 log_debugx("CTL port %ju wasn't managed by ctld; " 502 "ignoring", (uintmax_t)port->port_id); 503 continue; 504 } 505 if (port->cfiscsi_state != 1) { 506 log_debugx("CTL port %ju is not active (%d); ignoring", 507 (uintmax_t)port->port_id, port->cfiscsi_state); 508 continue; 509 } 510 511 targ = target_find(conf, port->cfiscsi_target); 512 if (targ == NULL) { 513#if 0 514 log_debugx("found new kernel target %s for CTL port %ld", 515 port->cfiscsi_target, port->port_id); 516#endif 517 targ = target_new(conf, port->cfiscsi_target); 518 if (targ == NULL) { 519 log_warnx("target_new failed"); 520 continue; 521 } 522 } 523 524 if (port->ctld_portal_group_name == NULL) 525 continue; 526 pg = portal_group_find(conf, port->ctld_portal_group_name); 527 if (pg == NULL) { 528#if 0 529 log_debugx("found new kernel portal group %s for CTL port %ld", 530 port->ctld_portal_group_name, port->port_id); 531#endif 532 pg = portal_group_new(conf, port->ctld_portal_group_name); 533 if (pg == NULL) { 534 log_warnx("portal_group_new failed"); 535 continue; 536 } 537 } 538 pg->pg_tag = port->cfiscsi_portal_group_tag; 539 cp = port_new(conf, targ, pg); 540 if (cp == NULL) { 541 log_warnx("port_new failed"); 542 continue; 543 } 544 cp->p_ctl_port = port->port_id; 545 } 546 547 STAILQ_FOREACH(lun, &devlist.lun_list, links) { 548 struct cctl_lun_nv *nv; 549 550 if (lun->ctld_name == NULL) { 551 log_debugx("CTL lun %ju wasn't managed by ctld; " 552 "ignoring", (uintmax_t)lun->lun_id); 553 continue; 554 } 555 556 cl = lun_find(conf, lun->ctld_name); 557 if (cl != NULL) { 558 log_warnx("found CTL lun %ju \"%s\", " 559 "also backed by CTL lun %d; ignoring", 560 (uintmax_t)lun->lun_id, lun->ctld_name, 561 cl->l_ctl_lun); 562 continue; 563 } 564 565 log_debugx("found CTL lun %ju \"%s\"", 566 (uintmax_t)lun->lun_id, lun->ctld_name); 567 568 cl = lun_new(conf, lun->ctld_name); 569 if (cl == NULL) { 570 log_warnx("lun_new failed"); 571 continue; 572 } 573 lun_set_backend(cl, lun->backend_type); 574 lun_set_blocksize(cl, lun->blocksize); 575 lun_set_device_id(cl, lun->device_id); 576 lun_set_serial(cl, lun->serial_number); 577 lun_set_size(cl, lun->size_blocks * cl->l_blocksize); 578 lun_set_ctl_lun(cl, lun->lun_id); 579 580 STAILQ_FOREACH(nv, &lun->attr_list, links) { 581 if (strcmp(nv->name, "file") == 0 || 582 strcmp(nv->name, "dev") == 0) { 583 lun_set_path(cl, nv->value); 584 continue; 585 } 586 lo = lun_option_new(cl, nv->name, nv->value); 587 if (lo == NULL) 588 log_warnx("unable to add CTL lun option %s " 589 "for CTL lun %ju \"%s\"", 590 nv->name, (uintmax_t) lun->lun_id, 591 cl->l_name); 592 } 593 } 594 595 return (conf); 596} 597 598static void 599str_arg(struct ctl_be_arg *arg, const char *name, const char *value) 600{ 601 602 arg->namelen = strlen(name) + 1; 603 arg->name = __DECONST(char *, name); 604 arg->vallen = strlen(value) + 1; 605 arg->value = __DECONST(char *, value); 606 arg->flags = CTL_BEARG_ASCII | CTL_BEARG_RD; 607} 608 609int 610kernel_lun_add(struct lun *lun) 611{ 612 struct lun_option *lo; 613 struct ctl_lun_req req; 614 int error, i, num_options; 615 616 bzero(&req, sizeof(req)); 617 618 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 619 req.reqtype = CTL_LUNREQ_CREATE; 620 621 req.reqdata.create.blocksize_bytes = lun->l_blocksize; 622 623 if (lun->l_size != 0) 624 req.reqdata.create.lun_size_bytes = lun->l_size; 625 626 req.reqdata.create.flags |= CTL_LUN_FLAG_DEV_TYPE; 627 req.reqdata.create.device_type = T_DIRECT; 628 629 if (lun->l_serial != NULL) { 630 strncpy(req.reqdata.create.serial_num, lun->l_serial, 631 sizeof(req.reqdata.create.serial_num)); 632 req.reqdata.create.flags |= CTL_LUN_FLAG_SERIAL_NUM; 633 } 634 635 if (lun->l_device_id != NULL) { 636 strncpy(req.reqdata.create.device_id, lun->l_device_id, 637 sizeof(req.reqdata.create.device_id)); 638 req.reqdata.create.flags |= CTL_LUN_FLAG_DEVID; 639 } 640 641 if (lun->l_path != NULL) { 642 lo = lun_option_find(lun, "file"); 643 if (lo != NULL) { 644 lun_option_set(lo, lun->l_path); 645 } else { 646 lo = lun_option_new(lun, "file", lun->l_path); 647 assert(lo != NULL); 648 } 649 } 650 651 lo = lun_option_find(lun, "ctld_name"); 652 if (lo != NULL) { 653 lun_option_set(lo, lun->l_name); 654 } else { 655 lo = lun_option_new(lun, "ctld_name", lun->l_name); 656 assert(lo != NULL); 657 } 658 659 lo = lun_option_find(lun, "scsiname"); 660 if (lo == NULL && lun->l_scsiname != NULL) { 661 lo = lun_option_new(lun, "scsiname", lun->l_scsiname); 662 assert(lo != NULL); 663 } 664 665 num_options = 0; 666 TAILQ_FOREACH(lo, &lun->l_options, lo_next) 667 num_options++; 668 669 req.num_be_args = num_options; 670 if (num_options > 0) { 671 req.be_args = malloc(num_options * sizeof(*req.be_args)); 672 if (req.be_args == NULL) { 673 log_warn("error allocating %zd bytes", 674 num_options * sizeof(*req.be_args)); 675 return (1); 676 } 677 678 i = 0; 679 TAILQ_FOREACH(lo, &lun->l_options, lo_next) { 680 str_arg(&req.be_args[i], lo->lo_name, lo->lo_value); 681 i++; 682 } 683 assert(i == num_options); 684 } 685 686 error = ioctl(ctl_fd, CTL_LUN_REQ, &req); 687 free(req.be_args); 688 if (error != 0) { 689 log_warn("error issuing CTL_LUN_REQ ioctl"); 690 return (1); 691 } 692 693 switch (req.status) { 694 case CTL_LUN_ERROR: 695 log_warnx("LUN creation error: %s", req.error_str); 696 return (1); 697 case CTL_LUN_WARNING: 698 log_warnx("LUN creation warning: %s", req.error_str); 699 break; 700 case CTL_LUN_OK: 701 break; 702 default: 703 log_warnx("unknown LUN creation status: %d", 704 req.status); 705 return (1); 706 } 707 708 lun_set_ctl_lun(lun, req.reqdata.create.req_lun_id); 709 return (0); 710} 711 712int 713kernel_lun_resize(struct lun *lun) 714{ 715 struct ctl_lun_req req; 716 717 bzero(&req, sizeof(req)); 718 719 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 720 req.reqtype = CTL_LUNREQ_MODIFY; 721 722 req.reqdata.modify.lun_id = lun->l_ctl_lun; 723 req.reqdata.modify.lun_size_bytes = lun->l_size; 724 725 if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) { 726 log_warn("error issuing CTL_LUN_REQ ioctl"); 727 return (1); 728 } 729 730 switch (req.status) { 731 case CTL_LUN_ERROR: 732 log_warnx("LUN modification error: %s", req.error_str); 733 return (1); 734 case CTL_LUN_WARNING: 735 log_warnx("LUN modification warning: %s", req.error_str); 736 break; 737 case CTL_LUN_OK: 738 break; 739 default: 740 log_warnx("unknown LUN modification status: %d", 741 req.status); 742 return (1); 743 } 744 745 return (0); 746} 747 748int 749kernel_lun_remove(struct lun *lun) 750{ 751 struct ctl_lun_req req; 752 753 bzero(&req, sizeof(req)); 754 755 strlcpy(req.backend, lun->l_backend, sizeof(req.backend)); 756 req.reqtype = CTL_LUNREQ_RM; 757 758 req.reqdata.rm.lun_id = lun->l_ctl_lun; 759 760 if (ioctl(ctl_fd, CTL_LUN_REQ, &req) == -1) { 761 log_warn("error issuing CTL_LUN_REQ ioctl"); 762 return (1); 763 } 764 765 switch (req.status) { 766 case CTL_LUN_ERROR: 767 log_warnx("LUN removal error: %s", req.error_str); 768 return (1); 769 case CTL_LUN_WARNING: 770 log_warnx("LUN removal warning: %s", req.error_str); 771 break; 772 case CTL_LUN_OK: 773 break; 774 default: 775 log_warnx("unknown LUN removal status: %d", req.status); 776 return (1); 777 } 778 779 return (0); 780} 781 782void 783kernel_handoff(struct connection *conn) 784{ 785 struct ctl_iscsi req; 786 787 bzero(&req, sizeof(req)); 788 789 req.type = CTL_ISCSI_HANDOFF; 790 strlcpy(req.data.handoff.initiator_name, 791 conn->conn_initiator_name, sizeof(req.data.handoff.initiator_name)); 792 strlcpy(req.data.handoff.initiator_addr, 793 conn->conn_initiator_addr, sizeof(req.data.handoff.initiator_addr)); 794 if (conn->conn_initiator_alias != NULL) { 795 strlcpy(req.data.handoff.initiator_alias, 796 conn->conn_initiator_alias, sizeof(req.data.handoff.initiator_alias)); 797 } 798 memcpy(req.data.handoff.initiator_isid, conn->conn_initiator_isid, 799 sizeof(req.data.handoff.initiator_isid)); 800 strlcpy(req.data.handoff.target_name, 801 conn->conn_target->t_name, sizeof(req.data.handoff.target_name)); 802 if (conn->conn_target->t_offload != NULL) { 803 strlcpy(req.data.handoff.offload, 804 conn->conn_target->t_offload, sizeof(req.data.handoff.offload)); 805 } 806#ifdef ICL_KERNEL_PROXY 807 if (proxy_mode) 808 req.data.handoff.connection_id = conn->conn_socket; 809 else 810 req.data.handoff.socket = conn->conn_socket; 811#else 812 req.data.handoff.socket = conn->conn_socket; 813#endif 814 req.data.handoff.portal_group_tag = 815 conn->conn_portal->p_portal_group->pg_tag; 816 if (conn->conn_header_digest == CONN_DIGEST_CRC32C) 817 req.data.handoff.header_digest = CTL_ISCSI_DIGEST_CRC32C; 818 if (conn->conn_data_digest == CONN_DIGEST_CRC32C) 819 req.data.handoff.data_digest = CTL_ISCSI_DIGEST_CRC32C; 820 req.data.handoff.cmdsn = conn->conn_cmdsn; 821 req.data.handoff.statsn = conn->conn_statsn; 822 req.data.handoff.max_recv_data_segment_length = 823 conn->conn_max_data_segment_length; 824 req.data.handoff.max_burst_length = conn->conn_max_burst_length; 825 req.data.handoff.immediate_data = conn->conn_immediate_data; 826 827 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 828 log_err(1, "error issuing CTL_ISCSI ioctl; " 829 "dropping connection"); 830 } 831 832 if (req.status != CTL_ISCSI_OK) { 833 log_errx(1, "error returned from CTL iSCSI handoff request: " 834 "%s; dropping connection", req.error_str); 835 } 836} 837 838void 839kernel_limits(const char *offload, size_t *max_data_segment_length) 840{ 841 struct ctl_iscsi req; 842 843 bzero(&req, sizeof(req)); 844 845 req.type = CTL_ISCSI_LIMITS; 846 if (offload != NULL) { 847 strlcpy(req.data.limits.offload, offload, 848 sizeof(req.data.limits.offload)); 849 } 850 851 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 852 log_err(1, "error issuing CTL_ISCSI ioctl; " 853 "dropping connection"); 854 } 855 856 if (req.status != CTL_ISCSI_OK) { 857 log_errx(1, "error returned from CTL iSCSI limits request: " 858 "%s; dropping connection", req.error_str); 859 } 860 861 *max_data_segment_length = req.data.limits.data_segment_limit; 862 if (offload != NULL) { 863 log_debugx("MaxRecvDataSegment kernel limit for offload " 864 "\"%s\" is %zd", offload, *max_data_segment_length); 865 } else { 866 log_debugx("MaxRecvDataSegment kernel limit is %zd", 867 *max_data_segment_length); 868 } 869} 870 871int 872kernel_port_add(struct port *port) 873{ 874 struct ctl_port_entry entry; 875 struct ctl_req req; 876 struct ctl_lun_map lm; 877 struct target *targ = port->p_target; 878 struct portal_group *pg = port->p_portal_group; 879 char tagstr[16]; 880 int error, i, n; 881 882 /* Create iSCSI port. */ 883 bzero(&req, sizeof(req)); 884 strlcpy(req.driver, "iscsi", sizeof(req.driver)); 885 req.reqtype = CTL_REQ_CREATE; 886 req.args = malloc(req.num_args * sizeof(*req.args)); 887 n = 0; 888 req.args[n].namelen = sizeof("port_id"); 889 req.args[n].name = __DECONST(char *, "port_id"); 890 req.args[n].vallen = sizeof(port->p_ctl_port); 891 req.args[n].value = &port->p_ctl_port; 892 req.args[n++].flags = CTL_BEARG_WR; 893 str_arg(&req.args[n++], "cfiscsi_target", targ->t_name); 894 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag); 895 str_arg(&req.args[n++], "cfiscsi_portal_group_tag", tagstr); 896 if (targ->t_alias) 897 str_arg(&req.args[n++], "cfiscsi_target_alias", targ->t_alias); 898 str_arg(&req.args[n++], "ctld_portal_group_name", pg->pg_name); 899 req.num_args = n; 900 error = ioctl(ctl_fd, CTL_PORT_REQ, &req); 901 free(req.args); 902 if (error != 0) { 903 log_warn("error issuing CTL_PORT_REQ ioctl"); 904 return (1); 905 } 906 if (req.status == CTL_LUN_ERROR) { 907 log_warnx("error returned from port creation request: %s", 908 req.error_str); 909 return (1); 910 } 911 if (req.status != CTL_LUN_OK) { 912 log_warnx("unknown port creation request status %d", 913 req.status); 914 return (1); 915 } 916 917 /* Explicitly enable mapping to block any access except allowed. */ 918 lm.port = port->p_ctl_port; 919 lm.plun = UINT32_MAX; 920 lm.lun = 0; 921 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 922 if (error != 0) 923 log_warn("CTL_LUN_MAP ioctl failed"); 924 925 /* Map configured LUNs */ 926 for (i = 0; i < MAX_LUNS; i++) { 927 if (targ->t_luns[i] == NULL) 928 continue; 929 lm.port = port->p_ctl_port; 930 lm.plun = i; 931 lm.lun = targ->t_luns[i]->l_ctl_lun; 932 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 933 if (error != 0) 934 log_warn("CTL_LUN_MAP ioctl failed"); 935 } 936 937 /* Enable port */ 938 bzero(&entry, sizeof(entry)); 939 entry.targ_port = port->p_ctl_port; 940 error = ioctl(ctl_fd, CTL_ENABLE_PORT, &entry); 941 if (error != 0) { 942 log_warn("CTL_ENABLE_PORT ioctl failed"); 943 return (-1); 944 } 945 946 return (0); 947} 948 949int 950kernel_port_update(struct port *port) 951{ 952 struct ctl_lun_map lm; 953 struct target *targ = port->p_target; 954 int error, i; 955 956 /* Map configured LUNs and unmap others */ 957 for (i = 0; i < MAX_LUNS; i++) { 958 lm.port = port->p_ctl_port; 959 lm.plun = i; 960 if (targ->t_luns[i] == NULL) 961 lm.lun = UINT32_MAX; 962 else 963 lm.lun = targ->t_luns[i]->l_ctl_lun; 964 error = ioctl(ctl_fd, CTL_LUN_MAP, &lm); 965 if (error != 0) 966 log_warn("CTL_LUN_MAP ioctl failed"); 967 } 968 return (0); 969} 970 971int 972kernel_port_remove(struct port *port) 973{ 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 bzero(&req, sizeof(req)); 981 strlcpy(req.driver, "iscsi", sizeof(req.driver)); 982 req.reqtype = CTL_REQ_REMOVE; 983 req.num_args = 2; 984 req.args = malloc(req.num_args * sizeof(*req.args)); 985 str_arg(&req.args[0], "cfiscsi_target", targ->t_name); 986 snprintf(tagstr, sizeof(tagstr), "%d", pg->pg_tag); 987 str_arg(&req.args[1], "cfiscsi_portal_group_tag", tagstr); 988 989 error = ioctl(ctl_fd, CTL_PORT_REQ, &req); 990 free(req.args); 991 if (error != 0) { 992 log_warn("error issuing CTL_PORT_REQ ioctl"); 993 return (1); 994 } 995 996 if (req.status == CTL_LUN_ERROR) { 997 log_warnx("error returned from port removal request: %s", 998 req.error_str); 999 return (1); 1000 } 1001 1002 if (req.status != CTL_LUN_OK) { 1003 log_warnx("unknown port removal request status %d", 1004 req.status); 1005 return (1); 1006 } 1007 1008 return (0); 1009} 1010 1011#ifdef ICL_KERNEL_PROXY 1012void 1013kernel_listen(struct addrinfo *ai, bool iser, int portal_id) 1014{ 1015 struct ctl_iscsi req; 1016 1017 bzero(&req, sizeof(req)); 1018 1019 req.type = CTL_ISCSI_LISTEN; 1020 req.data.listen.iser = iser; 1021 req.data.listen.domain = ai->ai_family; 1022 req.data.listen.socktype = ai->ai_socktype; 1023 req.data.listen.protocol = ai->ai_protocol; 1024 req.data.listen.addr = ai->ai_addr; 1025 req.data.listen.addrlen = ai->ai_addrlen; 1026 req.data.listen.portal_id = portal_id; 1027 1028 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) 1029 log_err(1, "error issuing CTL_ISCSI ioctl"); 1030 1031 if (req.status != CTL_ISCSI_OK) { 1032 log_errx(1, "error returned from CTL iSCSI listen: %s", 1033 req.error_str); 1034 } 1035} 1036 1037void 1038kernel_accept(int *connection_id, int *portal_id, 1039 struct sockaddr *client_sa, socklen_t *client_salen) 1040{ 1041 struct ctl_iscsi req; 1042 struct sockaddr_storage ss; 1043 1044 bzero(&req, sizeof(req)); 1045 1046 req.type = CTL_ISCSI_ACCEPT; 1047 req.data.accept.initiator_addr = (struct sockaddr *)&ss; 1048 1049 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) 1050 log_err(1, "error issuing CTL_ISCSI ioctl"); 1051 1052 if (req.status != CTL_ISCSI_OK) { 1053 log_errx(1, "error returned from CTL iSCSI accept: %s", 1054 req.error_str); 1055 } 1056 1057 *connection_id = req.data.accept.connection_id; 1058 *portal_id = req.data.accept.portal_id; 1059 *client_salen = req.data.accept.initiator_addrlen; 1060 memcpy(client_sa, &ss, *client_salen); 1061} 1062 1063void 1064kernel_send(struct pdu *pdu) 1065{ 1066 struct ctl_iscsi req; 1067 1068 bzero(&req, sizeof(req)); 1069 1070 req.type = CTL_ISCSI_SEND; 1071 req.data.send.connection_id = pdu->pdu_connection->conn_socket; 1072 req.data.send.bhs = pdu->pdu_bhs; 1073 req.data.send.data_segment_len = pdu->pdu_data_len; 1074 req.data.send.data_segment = pdu->pdu_data; 1075 1076 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 1077 log_err(1, "error issuing CTL_ISCSI ioctl; " 1078 "dropping connection"); 1079 } 1080 1081 if (req.status != CTL_ISCSI_OK) { 1082 log_errx(1, "error returned from CTL iSCSI send: " 1083 "%s; dropping connection", req.error_str); 1084 } 1085} 1086 1087void 1088kernel_receive(struct pdu *pdu) 1089{ 1090 struct ctl_iscsi req; 1091 1092 pdu->pdu_data = malloc(MAX_DATA_SEGMENT_LENGTH); 1093 if (pdu->pdu_data == NULL) 1094 log_err(1, "malloc"); 1095 1096 bzero(&req, sizeof(req)); 1097 1098 req.type = CTL_ISCSI_RECEIVE; 1099 req.data.receive.connection_id = pdu->pdu_connection->conn_socket; 1100 req.data.receive.bhs = pdu->pdu_bhs; 1101 req.data.receive.data_segment_len = MAX_DATA_SEGMENT_LENGTH; 1102 req.data.receive.data_segment = pdu->pdu_data; 1103 1104 if (ioctl(ctl_fd, CTL_ISCSI, &req) == -1) { 1105 log_err(1, "error issuing CTL_ISCSI ioctl; " 1106 "dropping connection"); 1107 } 1108 1109 if (req.status != CTL_ISCSI_OK) { 1110 log_errx(1, "error returned from CTL iSCSI receive: " 1111 "%s; dropping connection", req.error_str); 1112 } 1113 1114} 1115 1116#endif /* ICL_KERNEL_PROXY */ 1117 1118/* 1119 * XXX: I CANT INTO LATIN 1120 */ 1121void 1122kernel_capsicate(void) 1123{ 1124 int error; 1125 cap_rights_t rights; 1126 const unsigned long cmds[] = { CTL_ISCSI }; 1127 1128 cap_rights_init(&rights, CAP_IOCTL); 1129 error = cap_rights_limit(ctl_fd, &rights); 1130 if (error != 0 && errno != ENOSYS) 1131 log_err(1, "cap_rights_limit"); 1132 1133 error = cap_ioctls_limit(ctl_fd, cmds, 1134 sizeof(cmds) / sizeof(cmds[0])); 1135 if (error != 0 && errno != ENOSYS) 1136 log_err(1, "cap_ioctls_limit"); 1137 1138 error = cap_enter(); 1139 if (error != 0 && errno != ENOSYS) 1140 log_err(1, "cap_enter"); 1141 1142 if (cap_sandboxed()) 1143 log_debugx("Capsicum capability mode enabled"); 1144 else 1145 log_warnx("Capsicum capability mode not supported"); 1146} 1147 1148