1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <sys/cpuvar.h> 27 #include <sys/types.h> 28 #include <sys/conf.h> 29 #include <sys/file.h> 30 #include <sys/ddi.h> 31 #include <sys/sunddi.h> 32 #include <sys/modctl.h> 33 #include <sys/sysmacros.h> 34 #include <sys/sdt.h> 35 36 #include <sys/socket.h> 37 #include <sys/strsubr.h> 38 39 #include <sys/stmf.h> 40 #include <sys/stmf_ioctl.h> 41 #include <sys/portif.h> 42 #include <sys/idm/idm.h> 43 44 #define ISCSIT_TGT_SM_STRINGS 45 #include <iscsit.h> 46 #include <iscsit_isns.h> 47 48 typedef struct { 49 list_node_t te_ctx_node; 50 iscsit_tgt_event_t te_ctx_event; 51 } tgt_event_ctx_t; 52 53 static void 54 tgt_sm_event_dispatch(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 55 56 static void 57 tgt_sm_created(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 58 59 static void 60 tgt_sm_onlining(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 61 62 static void 63 tgt_sm_online(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 64 65 static void 66 tgt_sm_stmf_online(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 67 68 static void 69 tgt_sm_deleting_need_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 70 71 static void 72 tgt_sm_offlining(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 73 74 static void 75 tgt_sm_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 76 77 static void 78 tgt_sm_stmf_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 79 80 static void 81 tgt_sm_deleting_stmf_dereg(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 82 83 static void 84 tgt_sm_deleting_stmf_dereg_fail(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 85 86 static void 87 tgt_sm_deleting(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx); 88 89 static void 90 iscsit_tgt_dereg_retry(void *arg); 91 92 static void 93 iscsit_tgt_dereg_task(void *arg); 94 95 static void 96 tgt_sm_new_state(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx, 97 iscsit_tgt_state_t new_state); 98 99 100 static iscsit_tgt_t * 101 iscsit_tgt_create(it_tgt_t *cfg_tgt); 102 103 static void 104 iscsit_tgt_unref(void *tgt); 105 106 static void 107 iscsit_tgt_async_wait_ref(iscsit_tgt_t *tgt, idm_refcnt_cb_t *cb_func); 108 109 static void 110 iscsit_tgt_destroy(iscsit_tgt_t *tgt); 111 112 static iscsit_tpgt_t * 113 iscsit_tgt_lookup_tpgt_locked(iscsit_tgt_t *tgt, uint16_t tag); 114 115 static iscsit_tpg_t * 116 iscsit_tpg_lookup_locked(char *tpg_name); 117 118 static iscsit_portal_t * 119 iscsit_tpg_portal_lookup_locked(iscsit_tpg_t *tpg, 120 struct sockaddr_storage *sa); 121 122 static idm_status_t 123 iscsit_tgt_online(iscsit_tgt_t *tgt); 124 125 static void 126 iscsit_tgt_offline(iscsit_tgt_t *tgt); 127 128 static idm_status_t 129 iscsit_tgt_modify(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt); 130 131 static idm_status_t 132 iscsit_tgt_merge_tpgt(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt, 133 list_t *tpgt_del_list); 134 135 static iscsit_tpgt_t * 136 iscsit_tpgt_create(it_tpgt_t *cfg_tpgt); 137 138 static iscsit_tpgt_t * 139 iscsit_tpgt_create_default(); 140 141 static void 142 iscsit_tpgt_destroy(iscsit_tpgt_t *tpgt); 143 144 static iscsit_tpg_t * 145 iscsit_tpg_create(it_tpg_t *tpg); 146 147 static void 148 iscsit_tpg_modify(iscsit_tpg_t *tpg, it_tpg_t *cfg_tpg); 149 150 static void 151 iscsit_tpg_destroy(iscsit_tpg_t *tpg); 152 153 static iscsit_portal_t * 154 iscsit_portal_create(iscsit_tpg_t *tpg, struct sockaddr_storage *sa); 155 156 static void 157 iscsit_portal_destroy(iscsit_portal_t *portal); 158 159 static idm_status_t 160 iscsit_portal_online(iscsit_portal_t *portal); 161 162 static void 163 iscsit_portal_offline(iscsit_portal_t *portal); 164 165 166 167 /* 168 * Target state machine 169 */ 170 171 void 172 iscsit_tgt_sm_event(iscsit_tgt_t *tgt, iscsit_tgt_event_t event) 173 { 174 mutex_enter(&tgt->target_mutex); 175 tgt_sm_event_locked(tgt, event); 176 mutex_exit(&tgt->target_mutex); 177 } 178 179 void 180 tgt_sm_event_locked(iscsit_tgt_t *tgt, iscsit_tgt_event_t event) 181 { 182 tgt_event_ctx_t *ctx; 183 184 iscsit_tgt_hold(tgt); 185 186 ctx = kmem_zalloc(sizeof (*ctx), KM_SLEEP); 187 188 ctx->te_ctx_event = event; 189 190 list_insert_tail(&tgt->target_events, ctx); 191 /* 192 * Use the target_sm_busy flag to keep the state machine single 193 * threaded. This also serves as recursion avoidance since this 194 * flag will always be set if we call iscsit_tgt_sm_event from 195 * within the state machine code. 196 */ 197 if (!tgt->target_sm_busy) { 198 tgt->target_sm_busy = B_TRUE; 199 while (!list_is_empty(&tgt->target_events)) { 200 ctx = list_head(&tgt->target_events); 201 list_remove(&tgt->target_events, ctx); 202 idm_sm_audit_event(&tgt->target_state_audit, 203 SAS_ISCSIT_TGT, (int)tgt->target_state, 204 (int)ctx->te_ctx_event, 0); 205 mutex_exit(&tgt->target_mutex); 206 tgt_sm_event_dispatch(tgt, ctx); 207 mutex_enter(&tgt->target_mutex); 208 } 209 tgt->target_sm_busy = B_FALSE; 210 211 } 212 213 iscsit_tgt_rele(tgt); 214 } 215 216 static void 217 tgt_sm_event_dispatch(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 218 { 219 DTRACE_PROBE2(tgt__event, iscsit_tgt_t *, tgt, 220 tgt_event_ctx_t *, ctx); 221 222 IDM_SM_LOG(CE_NOTE, "tgt_sm_event_dispatch: tgt %p event %s(%d)", 223 (void *)tgt, iscsit_te_name[ctx->te_ctx_event], ctx->te_ctx_event); 224 225 /* State independent actions */ 226 switch (ctx->te_ctx_event) { 227 case TE_DELETE: 228 tgt->target_deleting = B_TRUE; 229 break; 230 } 231 232 /* State dependent actions */ 233 switch (tgt->target_state) { 234 case TS_CREATED: 235 tgt_sm_created(tgt, ctx); 236 break; 237 case TS_ONLINING: 238 tgt_sm_onlining(tgt, ctx); 239 break; 240 case TS_ONLINE: 241 tgt_sm_online(tgt, ctx); 242 break; 243 case TS_STMF_ONLINE: 244 tgt_sm_stmf_online(tgt, ctx); 245 break; 246 case TS_DELETING_NEED_OFFLINE: 247 tgt_sm_deleting_need_offline(tgt, ctx); 248 break; 249 case TS_OFFLINING: 250 tgt_sm_offlining(tgt, ctx); 251 break; 252 case TS_OFFLINE: 253 tgt_sm_offline(tgt, ctx); 254 break; 255 case TS_STMF_OFFLINE: 256 tgt_sm_stmf_offline(tgt, ctx); 257 break; 258 case TS_DELETING_STMF_DEREG: 259 tgt_sm_deleting_stmf_dereg(tgt, ctx); 260 break; 261 case TS_DELETING_STMF_DEREG_FAIL: 262 tgt_sm_deleting_stmf_dereg_fail(tgt, ctx); 263 break; 264 case TS_DELETING: 265 tgt_sm_deleting(tgt, ctx); 266 break; 267 default: 268 ASSERT(0); 269 } 270 271 kmem_free(ctx, sizeof (*ctx)); 272 } 273 274 static void 275 tgt_sm_created(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 276 { 277 stmf_change_status_t scs; 278 279 switch (ctx->te_ctx_event) { 280 case TE_STMF_ONLINE_REQ: 281 tgt_sm_new_state(tgt, ctx, TS_ONLINING); 282 break; 283 case TE_DELETE: 284 tgt_sm_new_state(tgt, ctx, TS_DELETING_STMF_DEREG); 285 break; 286 case TE_STMF_OFFLINE_REQ: 287 /* 288 * We're already offline but update to an equivelant 289 * state just to note that STMF talked to us. 290 */ 291 scs.st_completion_status = STMF_SUCCESS; 292 scs.st_additional_info = NULL; 293 tgt_sm_new_state(tgt, ctx, TS_OFFLINE); 294 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE_COMPLETE, 295 tgt->target_stmf_lport, &scs); 296 break; 297 case TE_STMF_ONLINE_COMPLETE_ACK: 298 case TE_STMF_OFFLINE_COMPLETE_ACK: 299 /* Ignore */ 300 break; 301 default: 302 ASSERT(0); 303 } 304 } 305 306 static void 307 tgt_sm_onlining(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 308 { 309 stmf_change_status_t scs; 310 311 switch (ctx->te_ctx_event) { 312 case TE_ONLINE_SUCCESS: 313 tgt_sm_new_state(tgt, ctx, TS_ONLINE); 314 break; 315 case TE_ONLINE_FAIL: 316 tgt_sm_new_state(tgt, ctx, TS_STMF_OFFLINE); 317 break; 318 case TE_DELETE: 319 /* TE_DELETE is handled in tgt_sm_event_dispatch() */ 320 break; 321 case TE_STMF_ONLINE_REQ: 322 case TE_STMF_OFFLINE_REQ: 323 /* 324 * We can't complete STMF's request since we are busy going 325 * online. 326 */ 327 scs.st_completion_status = STMF_INVALID_ARG; 328 scs.st_additional_info = NULL; 329 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 330 STMF_CMD_LPORT_ONLINE_COMPLETE : 331 STMF_CMD_LPORT_OFFLINE_COMPLETE, 332 tgt->target_stmf_lport, &scs); 333 break; 334 case TE_STMF_ONLINE_COMPLETE_ACK: 335 case TE_STMF_OFFLINE_COMPLETE_ACK: 336 /* Ignore */ 337 break; 338 default: 339 ASSERT(0); 340 } 341 } 342 343 static void 344 tgt_sm_online(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 345 { 346 stmf_change_status_t scs; 347 348 switch (ctx->te_ctx_event) { 349 case TE_STMF_ONLINE_COMPLETE_ACK: 350 if (tgt->target_deleting) { 351 tgt_sm_new_state(tgt, ctx, TS_DELETING_NEED_OFFLINE); 352 } else { 353 tgt_sm_new_state(tgt, ctx, TS_STMF_ONLINE); 354 } 355 break; 356 case TE_DELETE: 357 /* TE_DELETE is handled in tgt_sm_event_dispatch() */ 358 break; 359 case TE_STMF_ONLINE_REQ: 360 case TE_STMF_OFFLINE_REQ: 361 /* 362 * We can't complete STMF's request since we are busy going 363 * online (waiting for acknowlegement from STMF) 364 */ 365 scs.st_completion_status = STMF_INVALID_ARG; 366 scs.st_additional_info = NULL; 367 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 368 STMF_CMD_LPORT_ONLINE_COMPLETE : 369 STMF_CMD_LPORT_OFFLINE_COMPLETE, 370 tgt->target_stmf_lport, &scs); 371 break; 372 case TE_STMF_OFFLINE_COMPLETE_ACK: 373 /* Ignore */ 374 break; 375 default: 376 ASSERT(0); 377 } 378 } 379 380 381 static void 382 tgt_sm_stmf_online(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 383 { 384 stmf_change_status_t scs; 385 386 /* Deregister target with iSNS whenever we leave this state */ 387 388 switch (ctx->te_ctx_event) { 389 case TE_DELETE: 390 (void) iscsit_isns_deregister(tgt); 391 tgt_sm_new_state(tgt, ctx, TS_DELETING_NEED_OFFLINE); 392 break; 393 case TE_STMF_OFFLINE_REQ: 394 (void) iscsit_isns_deregister(tgt); 395 tgt_sm_new_state(tgt, ctx, TS_OFFLINING); 396 break; 397 case TE_STMF_ONLINE_REQ: 398 /* Already online */ 399 scs.st_completion_status = STMF_ALREADY; 400 scs.st_additional_info = NULL; 401 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE_COMPLETE, 402 tgt->target_stmf_lport, &scs); 403 break; 404 case TE_STMF_ONLINE_COMPLETE_ACK: 405 case TE_STMF_OFFLINE_COMPLETE_ACK: 406 /* Ignore */ 407 break; 408 default: 409 ASSERT(0); 410 } 411 } 412 413 414 static void 415 tgt_sm_deleting_need_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 416 { 417 stmf_change_status_t scs; 418 419 switch (ctx->te_ctx_event) { 420 case TE_STMF_OFFLINE_REQ: 421 tgt_sm_new_state(tgt, ctx, TS_OFFLINING); 422 break; 423 case TE_DELETE: 424 /* TE_DELETE is handled in tgt_sm_event_dispatch() */ 425 break; 426 case TE_STMF_ONLINE_REQ: 427 /* 428 * We can't complete STMF's request since we need to be offlined 429 */ 430 scs.st_completion_status = STMF_INVALID_ARG; 431 scs.st_additional_info = NULL; 432 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE_COMPLETE, 433 tgt->target_stmf_lport, &scs); 434 break; 435 case TE_STMF_ONLINE_COMPLETE_ACK: 436 case TE_STMF_OFFLINE_COMPLETE_ACK: 437 /* Ignore */ 438 break; 439 default: 440 ASSERT(0); 441 } 442 } 443 444 445 static void 446 tgt_sm_offlining(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 447 { 448 stmf_change_status_t scs; 449 450 switch (ctx->te_ctx_event) { 451 case TE_OFFLINE_COMPLETE: 452 tgt_sm_new_state(tgt, ctx, TS_OFFLINE); 453 break; 454 case TE_DELETE: 455 /* TE_DELETE is handled in tgt_sm_event_dispatch() */ 456 break; 457 case TE_STMF_ONLINE_REQ: 458 case TE_STMF_OFFLINE_REQ: 459 /* 460 * We can't complete STMF's request since we are busy going 461 * offline. 462 */ 463 scs.st_completion_status = STMF_INVALID_ARG; 464 scs.st_additional_info = NULL; 465 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 466 STMF_CMD_LPORT_ONLINE_COMPLETE : 467 STMF_CMD_LPORT_OFFLINE_COMPLETE, 468 tgt->target_stmf_lport, &scs); 469 break; 470 case TE_STMF_ONLINE_COMPLETE_ACK: 471 case TE_STMF_OFFLINE_COMPLETE_ACK: 472 /* Ignore */ 473 break; 474 default: 475 ASSERT(0); 476 } 477 } 478 479 480 static void 481 tgt_sm_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 482 { 483 stmf_change_status_t scs; 484 485 switch (ctx->te_ctx_event) { 486 case TE_STMF_OFFLINE_COMPLETE_ACK: 487 if (tgt->target_deleting) { 488 tgt_sm_new_state(tgt, ctx, TS_DELETING_STMF_DEREG); 489 } else { 490 tgt_sm_new_state(tgt, ctx, TS_STMF_OFFLINE); 491 } 492 break; 493 case TE_DELETE: 494 /* TE_DELETE is handled in tgt_sm_event_dispatch() */ 495 break; 496 case TE_STMF_ONLINE_REQ: 497 case TE_STMF_OFFLINE_REQ: 498 /* 499 * We can't complete STMF's request since we are busy going 500 * offline. 501 */ 502 scs.st_completion_status = STMF_INVALID_ARG; 503 scs.st_additional_info = NULL; 504 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 505 STMF_CMD_LPORT_ONLINE_COMPLETE : 506 STMF_CMD_LPORT_OFFLINE_COMPLETE, 507 tgt->target_stmf_lport, &scs); 508 break; 509 case TE_STMF_ONLINE_COMPLETE_ACK: 510 /* Ignore */ 511 break; 512 default: 513 ASSERT(0); 514 } 515 } 516 517 518 static void 519 tgt_sm_stmf_offline(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 520 { 521 stmf_change_status_t scs; 522 523 switch (ctx->te_ctx_event) { 524 case TE_STMF_ONLINE_REQ: 525 tgt_sm_new_state(tgt, ctx, TS_ONLINING); 526 break; 527 case TE_DELETE: 528 tgt_sm_new_state(tgt, ctx, TS_DELETING_STMF_DEREG); 529 break; 530 case TE_STMF_OFFLINE_REQ: 531 /* Already offline */ 532 scs.st_completion_status = STMF_ALREADY; 533 scs.st_additional_info = NULL; 534 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE_COMPLETE, 535 tgt->target_stmf_lport, &scs); 536 break; 537 case TE_STMF_ONLINE_COMPLETE_ACK: 538 case TE_STMF_OFFLINE_COMPLETE_ACK: 539 /* Ignore */ 540 break; 541 default: 542 ASSERT(0); 543 } 544 } 545 546 547 static void 548 tgt_sm_deleting_stmf_dereg(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 549 { 550 stmf_change_status_t scs; 551 552 /* Terminal state, no events */ 553 switch (ctx->te_ctx_event) { 554 case TE_STMF_ONLINE_REQ: 555 case TE_STMF_OFFLINE_REQ: 556 /* 557 * We can't complete STMF's request since we are being deleted 558 */ 559 scs.st_completion_status = STMF_INVALID_ARG; 560 scs.st_additional_info = NULL; 561 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 562 STMF_CMD_LPORT_ONLINE_COMPLETE : 563 STMF_CMD_LPORT_OFFLINE_COMPLETE, 564 tgt->target_stmf_lport, &scs); 565 break; 566 case TE_STMF_ONLINE_COMPLETE_ACK: 567 case TE_STMF_OFFLINE_COMPLETE_ACK: 568 /* Ignore */ 569 break; 570 case TE_STMF_DEREG_SUCCESS: 571 tgt_sm_new_state(tgt, ctx, TS_DELETING); 572 break; 573 case TE_STMF_DEREG_FAIL: 574 tgt_sm_new_state(tgt, ctx, TS_DELETING_STMF_DEREG_FAIL); 575 break; 576 default: 577 ASSERT(0); 578 } 579 } 580 581 static void 582 tgt_sm_deleting_stmf_dereg_fail(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 583 { 584 stmf_change_status_t scs; 585 586 /* Terminal state, no events */ 587 switch (ctx->te_ctx_event) { 588 case TE_STMF_ONLINE_REQ: 589 case TE_STMF_OFFLINE_REQ: 590 /* 591 * We can't complete STMF's request since we are being deleted 592 */ 593 scs.st_completion_status = STMF_INVALID_ARG; 594 scs.st_additional_info = NULL; 595 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 596 STMF_CMD_LPORT_ONLINE_COMPLETE : 597 STMF_CMD_LPORT_OFFLINE_COMPLETE, 598 tgt->target_stmf_lport, &scs); 599 break; 600 case TE_STMF_ONLINE_COMPLETE_ACK: 601 case TE_STMF_OFFLINE_COMPLETE_ACK: 602 /* Ignore */ 603 break; 604 case TE_STMF_DEREG_RETRY: 605 tgt_sm_new_state(tgt, ctx, TS_DELETING_STMF_DEREG); 606 break; 607 default: 608 ASSERT(0); 609 } 610 } 611 612 static void 613 tgt_sm_deleting(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx) 614 { 615 stmf_change_status_t scs; 616 617 /* Terminal state, no events */ 618 switch (ctx->te_ctx_event) { 619 case TE_STMF_ONLINE_REQ: 620 case TE_STMF_OFFLINE_REQ: 621 /* 622 * We can't complete STMF's request since we are being deleted 623 */ 624 scs.st_completion_status = STMF_INVALID_ARG; 625 scs.st_additional_info = NULL; 626 (void) stmf_ctl((ctx->te_ctx_event == TE_STMF_ONLINE_REQ) ? 627 STMF_CMD_LPORT_ONLINE_COMPLETE : 628 STMF_CMD_LPORT_OFFLINE_COMPLETE, 629 tgt->target_stmf_lport, &scs); 630 break; 631 case TE_STMF_ONLINE_COMPLETE_ACK: 632 case TE_STMF_OFFLINE_COMPLETE_ACK: 633 /* Ignore */ 634 break; 635 default: 636 ASSERT(0); 637 } 638 } 639 640 641 static void 642 iscsit_tgt_dereg_retry(void *arg) 643 { 644 iscsit_tgt_t *tgt = arg; 645 646 /* 647 * Rather than guaranteeing the target state machine code will not 648 * block for long periods of time (tying up this callout thread) 649 * we will queue a task on the taskq to send the retry event. 650 * If it fails we'll setup another timeout and try again later. 651 */ 652 if (taskq_dispatch(iscsit_global.global_dispatch_taskq, 653 iscsit_tgt_dereg_task, tgt, DDI_NOSLEEP) == NULL) { 654 /* Dispatch failed, try again later */ 655 (void) timeout(iscsit_tgt_dereg_retry, tgt, 656 drv_usectohz(TGT_DEREG_RETRY_SECONDS * 1000000)); 657 } 658 } 659 660 static void 661 iscsit_tgt_dereg_task(void *arg) 662 { 663 iscsit_tgt_t *tgt = arg; 664 665 iscsit_tgt_sm_event(tgt, TE_STMF_DEREG_RETRY); 666 } 667 668 static void 669 tgt_sm_new_state(iscsit_tgt_t *tgt, tgt_event_ctx_t *ctx, 670 iscsit_tgt_state_t new_state) 671 { 672 stmf_local_port_t *lport = tgt->target_stmf_lport; 673 stmf_change_status_t scs; 674 stmf_state_change_info_t sci; 675 idm_status_t idmrc; 676 stmf_status_t stmfrc; 677 678 scs.st_completion_status = STMF_SUCCESS; 679 scs.st_additional_info = NULL; 680 681 /* 682 * Validate new state 683 */ 684 ASSERT(new_state != TS_UNDEFINED); 685 ASSERT3U(new_state, <, TS_MAX_STATE); 686 687 new_state = (new_state < TS_MAX_STATE) ? 688 new_state : TS_UNDEFINED; 689 690 IDM_SM_LOG(CE_NOTE, "tgt_sm_new_state: tgt %p, %s(%d) --> %s(%d)\n", 691 (void *) tgt, iscsit_ts_name[tgt->target_state], tgt->target_state, 692 iscsit_ts_name[new_state], new_state); 693 DTRACE_PROBE3(target__state__change, 694 iscsit_tgt_t *, tgt, tgt_event_ctx_t *, ctx, 695 iscsit_tgt_state_t, new_state); 696 697 mutex_enter(&tgt->target_mutex); 698 idm_sm_audit_state_change(&tgt->target_state_audit, SAS_ISCSIT_TGT, 699 (int)tgt->target_state, (int)new_state); 700 tgt->target_last_state = tgt->target_state; 701 tgt->target_state = new_state; 702 mutex_exit(&tgt->target_mutex); 703 704 switch (tgt->target_state) { 705 case TS_ONLINING: 706 idmrc = iscsit_tgt_online(tgt); 707 if (idmrc != IDM_STATUS_SUCCESS) { 708 scs.st_completion_status = STMF_TARGET_FAILURE; 709 iscsit_tgt_sm_event(tgt, TE_ONLINE_FAIL); 710 } else { 711 iscsit_tgt_sm_event(tgt, TE_ONLINE_SUCCESS); 712 } 713 /* 714 * Let STMF know the how the online operation completed. 715 * STMF will respond with an acknowlege later 716 */ 717 (void) stmf_ctl(STMF_CMD_LPORT_ONLINE_COMPLETE, lport, &scs); 718 break; 719 case TS_ONLINE: 720 break; 721 case TS_STMF_ONLINE: 722 (void) iscsit_isns_register(tgt); 723 break; 724 case TS_DELETING_NEED_OFFLINE: 725 sci.st_rflags = STMF_RFLAG_STAY_OFFLINED; 726 sci.st_additional_info = "Offline for delete"; 727 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE, lport, &sci); 728 break; 729 case TS_OFFLINING: 730 /* Async callback generates completion event */ 731 iscsit_tgt_offline(tgt); 732 break; 733 case TS_OFFLINE: 734 break; 735 case TS_STMF_OFFLINE: 736 break; 737 case TS_DELETING_STMF_DEREG: 738 stmfrc = stmf_deregister_local_port(tgt->target_stmf_lport); 739 if (stmfrc == STMF_SUCCESS) { 740 iscsit_tgt_sm_event(tgt, TE_STMF_DEREG_SUCCESS); 741 } else { 742 iscsit_tgt_sm_event(tgt, TE_STMF_DEREG_FAIL); 743 } 744 break; 745 case TS_DELETING_STMF_DEREG_FAIL: 746 /* Retry dereg in 1 second */ 747 (void) timeout(iscsit_tgt_dereg_retry, tgt, 748 drv_usectohz(TGT_DEREG_RETRY_SECONDS * 1000000)); 749 break; 750 case TS_DELETING: 751 iscsit_tgt_async_wait_ref(tgt, iscsit_tgt_unref); 752 break; 753 default: 754 ASSERT(0); 755 } 756 } 757 758 759 /* 760 * Target, TPGT, TPG utility functions 761 */ 762 763 it_cfg_status_t 764 iscsit_config_merge_tgt(it_config_t *cfg) 765 { 766 it_tgt_t *cfg_tgt; 767 iscsit_tgt_t *tgt, *next_tgt; 768 769 770 /* 771 * 1. >> Lock << 772 * 2. Removing deleted objects 773 * 3. Add deleted targets to global delete list 774 * 4. "delete" event to target state machine 775 * 5. >> Unlock << 776 * 6. Create new targets, update modified targets 777 */ 778 for (tgt = avl_first(&iscsit_global.global_target_list); 779 tgt != NULL; 780 tgt = next_tgt) { 781 next_tgt = AVL_NEXT(&iscsit_global.global_target_list, tgt); 782 783 if (it_tgt_lookup(cfg, tgt->target_name) == NULL) { 784 avl_remove(&iscsit_global.global_target_list, tgt); 785 list_insert_tail( 786 &iscsit_global.global_deleted_target_list, tgt); 787 iscsit_tgt_sm_event(tgt, TE_DELETE); 788 } 789 } 790 791 /* Now walk through the list of configured targets */ 792 for (cfg_tgt = cfg->config_tgt_list; 793 cfg_tgt != NULL; 794 cfg_tgt = cfg_tgt->tgt_next) { 795 /* See if we have an existing target */ 796 tgt = iscsit_tgt_lookup_locked(cfg_tgt->tgt_name); 797 798 if (tgt == NULL) { 799 tgt = iscsit_tgt_create(cfg_tgt); 800 if (tgt == NULL) 801 return (ITCFG_TGT_CREATE_ERR); 802 avl_add(&iscsit_global.global_target_list, tgt); 803 } else { 804 (void) iscsit_tgt_modify(tgt, cfg_tgt); 805 iscsit_tgt_rele(tgt); 806 } 807 } 808 809 /* 810 * Targets on the iscsit_global.global_deleted_target_list will remove 811 * and destroy themselves when their associated state machines reach 812 * the TS_DELETED state and all references are released. 813 */ 814 return (ITCFG_SUCCESS); 815 } 816 817 iscsit_tgt_t * 818 iscsit_tgt_lookup(char *target_name) 819 { 820 iscsit_tgt_t *result; 821 822 ISCSIT_GLOBAL_LOCK(RW_READER); 823 result = iscsit_tgt_lookup_locked(target_name); 824 ISCSIT_GLOBAL_UNLOCK(); 825 826 return (result); 827 } 828 829 iscsit_tgt_t * 830 iscsit_tgt_lookup_locked(char *target_name) 831 { 832 iscsit_tgt_t tmp_tgt; 833 iscsit_tgt_t *result; 834 835 /* 836 * Use a dummy target for lookup, filling in all fields used in AVL 837 * comparison. 838 */ 839 tmp_tgt.target_name = target_name; 840 if ((result = avl_find(&iscsit_global.global_target_list, 841 &tmp_tgt, NULL)) != NULL) { 842 iscsit_tgt_hold(result); 843 } 844 845 return (result); 846 } 847 848 iscsit_tgt_t * 849 iscsit_tgt_create(it_tgt_t *cfg_tgt) 850 { 851 iscsit_tgt_t *result; 852 stmf_local_port_t *lport; 853 854 /* 855 * Each target is an STMF local port. 856 */ 857 lport = stmf_alloc(STMF_STRUCT_STMF_LOCAL_PORT, 858 sizeof (iscsit_tgt_t) + sizeof (scsi_devid_desc_t) + 859 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN) + 1, 0); 860 if (lport == NULL) { 861 return (NULL); 862 } 863 864 result = lport->lport_port_private; 865 result->target_state = TS_CREATED; 866 result->target_stmf_lport_registered = 0; 867 /* Use pointer arithmetic to find scsi_devid_desc_t */ 868 result->target_devid = (scsi_devid_desc_t *)(result + 1); 869 (void) strcpy((char *)result->target_devid->ident, cfg_tgt->tgt_name); 870 result->target_devid->ident_length = 871 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN); 872 result->target_devid->protocol_id = PROTOCOL_iSCSI; 873 result->target_devid->piv = 1; 874 result->target_devid->code_set = CODE_SET_ASCII; 875 result->target_devid->association = ID_IS_TARGET_PORT; 876 877 /* Store a shortcut to the target name */ 878 result->target_name = (char *)result->target_devid->ident; 879 idm_sm_audit_init(&result->target_state_audit); 880 mutex_init(&result->target_mutex, NULL, MUTEX_DEFAULT, NULL); 881 avl_create(&result->target_sess_list, iscsit_sess_avl_compare, 882 sizeof (iscsit_sess_t), offsetof(iscsit_sess_t, ist_tgt_ln)); 883 avl_create(&result->target_tpgt_list, iscsit_tpgt_avl_compare, 884 sizeof (iscsit_tpgt_t), offsetof(iscsit_tpgt_t, tpgt_tgt_ln)); 885 list_create(&result->target_events, sizeof (tgt_event_ctx_t), 886 offsetof(tgt_event_ctx_t, te_ctx_node)); 887 idm_refcnt_init(&result->target_refcnt, result); 888 idm_refcnt_init(&result->target_sess_refcnt, result); 889 890 /* Finish initializing local port */ 891 /* 892 * Would like infinite timeout, but this is about as long as can 893 * be specified to stmf on a 32 bit kernel. 894 */ 895 lport->lport_abort_timeout = 2000; /* seconds */ 896 lport->lport_id = result->target_devid; 897 lport->lport_pp = iscsit_global.global_pp; 898 lport->lport_ds = iscsit_global.global_dbuf_store; 899 lport->lport_xfer_data = &iscsit_xfer_scsi_data; 900 lport->lport_send_status = &iscsit_send_scsi_status; 901 lport->lport_task_free = &iscsit_lport_task_free; 902 lport->lport_abort = &iscsit_abort; 903 lport->lport_ctl = &iscsit_ctl; 904 result->target_stmf_lport = lport; 905 906 /* 907 * We need a global hold until the STMF-ONLINE state machine 908 * completes. Acquire that hold now, in case we need to call 909 * iscsit_tgt_destroy, which will also release the hold. 910 */ 911 iscsit_global_hold(); 912 913 /* 914 * Additional target modifications from config 915 */ 916 if (iscsit_tgt_modify(result, cfg_tgt) != IDM_STATUS_SUCCESS) { 917 iscsit_tgt_destroy(result); 918 return (NULL); 919 } 920 921 /* 922 * Register the target with STMF but not until we have all the 923 * TPGT bindings and any other additional config setup. STMF 924 * may immediately ask us to go online. 925 */ 926 if (stmf_register_local_port(lport) != STMF_SUCCESS) { 927 iscsit_tgt_destroy(result); 928 return (NULL); 929 } 930 result->target_stmf_lport_registered = 1; 931 932 return (result); 933 } 934 935 static idm_status_t 936 iscsit_tgt_modify(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt) 937 { 938 idm_status_t idmrc = IDM_STATUS_SUCCESS; 939 list_t tpgt_del_list; 940 941 /* Merge TPGT */ 942 list_create(&tpgt_del_list, sizeof (iscsit_tpgt_t), 943 offsetof(iscsit_tpgt_t, tpgt_delete_ln)); 944 945 mutex_enter(&tgt->target_mutex); 946 if (tgt->target_props) { 947 nvlist_free(tgt->target_props); 948 tgt->target_props = NULL; 949 } 950 (void) nvlist_dup(cfg_tgt->tgt_properties, &tgt->target_props, 951 KM_SLEEP); 952 953 if ((idmrc = iscsit_tgt_merge_tpgt(tgt, cfg_tgt, &tpgt_del_list)) != 954 IDM_STATUS_SUCCESS) { 955 /* This should never happen */ 956 cmn_err(CE_WARN, "Fail to configure TPGTs for " 957 "target %s, the target modification could not be " 958 "completed.", tgt->target_name); 959 } 960 961 mutex_exit(&tgt->target_mutex); 962 963 iscsit_config_destroy_tpgts(&tpgt_del_list); 964 965 /* 966 * If the target is truly modified (not newly created), 967 * inform iSNS to update the target registration. 968 */ 969 if ((tgt->target_generation > 0) && 970 (cfg_tgt->tgt_generation > tgt->target_generation)) { 971 iscsit_isns_target_update(tgt); 972 } 973 974 tgt->target_generation = cfg_tgt->tgt_generation; 975 976 return (idmrc); 977 } 978 979 void 980 iscsit_config_destroy_tpgts(list_t *tpgt_del_list) 981 { 982 iscsit_tpgt_t *tpgt, *next_tpgt; 983 984 for (tpgt = list_head(tpgt_del_list); 985 tpgt != NULL; 986 tpgt = next_tpgt) { 987 next_tpgt = list_next(tpgt_del_list, tpgt); 988 989 list_remove(tpgt_del_list, tpgt); 990 idm_refcnt_wait_ref(&tpgt->tpgt_refcnt); 991 iscsit_tpgt_destroy(tpgt); 992 } 993 } 994 995 void 996 iscsit_tgt_unref(void *tgt_void) 997 { 998 iscsit_tgt_t *tgt = tgt_void; 999 1000 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1001 list_remove(&iscsit_global.global_deleted_target_list, tgt); 1002 ISCSIT_GLOBAL_UNLOCK(); 1003 iscsit_tgt_destroy(tgt); 1004 } 1005 1006 void 1007 iscsit_tgt_async_wait_ref(iscsit_tgt_t *tgt, idm_refcnt_cb_t *cb_func) 1008 { 1009 idm_refcnt_async_wait_ref(&tgt->target_refcnt, cb_func); 1010 } 1011 1012 static void 1013 iscsit_tgt_destroy(iscsit_tgt_t *tgt) 1014 { 1015 iscsit_tpgt_t *tpgt, *next_tpgt; 1016 1017 ASSERT(tgt->target_state == TS_DELETING || 1018 (tgt->target_state == TS_CREATED && 1019 tgt->target_stmf_lport_registered == 0)); 1020 1021 /* 1022 * Destroy all target portal group tags 1023 */ 1024 mutex_enter(&tgt->target_mutex); 1025 for (tpgt = avl_first(&tgt->target_tpgt_list); 1026 tpgt != NULL; 1027 tpgt = next_tpgt) { 1028 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt); 1029 avl_remove(&tgt->target_tpgt_list, tpgt); 1030 iscsit_tpgt_destroy(tpgt); 1031 } 1032 1033 if (tgt->target_props) { 1034 nvlist_free(tgt->target_props); 1035 } 1036 mutex_exit(&tgt->target_mutex); 1037 1038 /* 1039 * Destroy target 1040 */ 1041 idm_refcnt_destroy(&tgt->target_sess_refcnt); 1042 idm_refcnt_destroy(&tgt->target_refcnt); 1043 list_destroy(&tgt->target_events); 1044 avl_destroy(&tgt->target_tpgt_list); 1045 avl_destroy(&tgt->target_sess_list); 1046 mutex_destroy(&tgt->target_mutex); 1047 stmf_free(tgt->target_stmf_lport); /* Also frees "tgt' */ 1048 iscsit_global_rele(); 1049 } 1050 1051 void 1052 iscsit_tgt_hold(iscsit_tgt_t *tgt) 1053 { 1054 idm_refcnt_hold(&tgt->target_refcnt); 1055 } 1056 1057 void 1058 iscsit_tgt_rele(iscsit_tgt_t *tgt) 1059 { 1060 idm_refcnt_rele(&tgt->target_refcnt); 1061 } 1062 1063 int 1064 iscsit_tgt_avl_compare(const void *void_tgt1, const void *void_tgt2) 1065 { 1066 const iscsit_tgt_t *tgt1 = void_tgt1; 1067 const iscsit_tgt_t *tgt2 = void_tgt2; 1068 int result; 1069 1070 /* 1071 * Sort by ISID first then TSIH 1072 */ 1073 result = strcmp(tgt1->target_name, tgt2->target_name); 1074 if (result < 0) { 1075 return (-1); 1076 } else if (result > 0) { 1077 return (1); 1078 } 1079 1080 return (0); 1081 } 1082 1083 1084 iscsit_tpgt_t * 1085 iscsit_tgt_lookup_tpgt(iscsit_tgt_t *tgt, uint16_t tag) 1086 { 1087 iscsit_tpgt_t *result; 1088 1089 mutex_enter(&tgt->target_mutex); 1090 result = iscsit_tgt_lookup_tpgt_locked(tgt, tag); 1091 mutex_exit(&tgt->target_mutex); 1092 1093 return (result); 1094 } 1095 1096 static iscsit_tpgt_t * 1097 iscsit_tgt_lookup_tpgt_locked(iscsit_tgt_t *tgt, uint16_t tag) 1098 { 1099 iscsit_tpgt_t tmp_tpgt; 1100 iscsit_tpgt_t *result; 1101 1102 /* Caller holds tgt->target_mutex */ 1103 tmp_tpgt.tpgt_tag = tag; 1104 if ((result = avl_find(&tgt->target_tpgt_list, &tmp_tpgt, NULL)) != 1105 NULL) { 1106 iscsit_tpgt_hold(result); 1107 } 1108 1109 return (result); 1110 } 1111 1112 iscsit_portal_t * 1113 iscsit_tgt_lookup_portal(iscsit_tgt_t *tgt, struct sockaddr_storage *sa, 1114 iscsit_tpgt_t **output_tpgt) 1115 { 1116 iscsit_tpgt_t *tpgt; 1117 iscsit_portal_t *portal; 1118 1119 /* Caller holds tgt->target_mutex */ 1120 ASSERT(mutex_owned(&tgt->target_mutex)); 1121 for (tpgt = avl_first(&tgt->target_tpgt_list); 1122 tpgt != NULL; 1123 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1124 portal = iscsit_tpg_portal_lookup(tpgt->tpgt_tpg, sa); 1125 if (portal) { 1126 iscsit_tpgt_hold(tpgt); 1127 *output_tpgt = tpgt; 1128 return (portal); 1129 } 1130 } 1131 1132 return (NULL); 1133 } 1134 1135 1136 void 1137 iscsit_tgt_bind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess) 1138 { 1139 if (tgt) { 1140 sess->ist_lport = tgt->target_stmf_lport; 1141 iscsit_tgt_hold(tgt); 1142 idm_refcnt_hold(&tgt->target_sess_refcnt); 1143 mutex_enter(&tgt->target_mutex); 1144 avl_add(&tgt->target_sess_list, sess); 1145 mutex_exit(&tgt->target_mutex); 1146 } else { 1147 /* Discovery session */ 1148 sess->ist_lport = NULL; 1149 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1150 avl_add(&iscsit_global.global_discovery_sessions, sess); 1151 ISCSIT_GLOBAL_UNLOCK(); 1152 } 1153 } 1154 1155 void 1156 iscsit_tgt_unbind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess) 1157 { 1158 if (tgt) { 1159 mutex_enter(&tgt->target_mutex); 1160 avl_remove(&tgt->target_sess_list, sess); 1161 mutex_exit(&tgt->target_mutex); 1162 sess->ist_tgt = (iscsit_tgt_t *)SESS_UNBOUND_FROM_TGT; 1163 idm_refcnt_rele(&tgt->target_sess_refcnt); 1164 iscsit_tgt_rele(tgt); 1165 } else { 1166 /* Discovery session */ 1167 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1168 avl_remove(&iscsit_global.global_discovery_sessions, sess); 1169 ISCSIT_GLOBAL_UNLOCK(); 1170 } 1171 } 1172 1173 #define LOCK_FOR_SESS_LOOKUP(lookup_tgt) { \ 1174 if ((lookup_tgt) == NULL) { \ 1175 ISCSIT_GLOBAL_LOCK(RW_READER); \ 1176 } else { \ 1177 mutex_enter(&(lookup_tgt)->target_mutex); \ 1178 } \ 1179 } 1180 1181 #define UNLOCK_FOR_SESS_LOOKUP(lookup_tgt) { \ 1182 if ((lookup_tgt) == NULL) { \ 1183 ISCSIT_GLOBAL_UNLOCK(); \ 1184 } else { \ 1185 mutex_exit(&(lookup_tgt)->target_mutex); \ 1186 } \ 1187 } 1188 1189 iscsit_sess_t * 1190 iscsit_tgt_lookup_sess(iscsit_tgt_t *tgt, char *initiator_name, 1191 uint8_t *isid, uint16_t tsih, uint16_t tag) 1192 { 1193 iscsit_sess_t tmp_sess; 1194 avl_tree_t *sess_avl; 1195 avl_index_t where; 1196 iscsit_sess_t *result; 1197 1198 /* 1199 * If tgt is NULL then we are looking for a discovery session 1200 */ 1201 if (tgt == NULL) { 1202 sess_avl = &iscsit_global.global_discovery_sessions; 1203 } else { 1204 sess_avl = &tgt->target_sess_list; 1205 } 1206 1207 LOCK_FOR_SESS_LOOKUP(tgt); 1208 if (avl_numnodes(sess_avl) == NULL) { 1209 UNLOCK_FOR_SESS_LOOKUP(tgt); 1210 return (NULL); 1211 } 1212 1213 /* 1214 * We'll try to find a session matching ISID + TSIH first. If we 1215 * can't find one then we will return the closest match. If the 1216 * caller needs an exact match it must compare the TSIH after 1217 * the session is returned. 1218 * 1219 * The reason we do this "fuzzy matching" is to allow matching 1220 * sessions with different TSIH values on the same AVL list. This 1221 * makes session reinstatement much easier since the new session can 1222 * live on the list at the same time as the old session is cleaning up. 1223 */ 1224 bcopy(isid, tmp_sess.ist_isid, ISCSI_ISID_LEN); 1225 tmp_sess.ist_initiator_name = initiator_name; 1226 tmp_sess.ist_tsih = tsih; 1227 tmp_sess.ist_tpgt_tag = tag; 1228 1229 result = avl_find(sess_avl, &tmp_sess, &where); 1230 if (result != NULL) { 1231 iscsit_sess_hold(result); 1232 UNLOCK_FOR_SESS_LOOKUP(tgt); 1233 return (result); 1234 } 1235 1236 /* 1237 * avl_find_nearest() may return a result with a different ISID so 1238 * we should only return a result if the name and ISID match 1239 */ 1240 result = avl_nearest(sess_avl, where, AVL_BEFORE); 1241 if ((result != NULL) && 1242 (strcmp(result->ist_initiator_name, initiator_name) == 0) && 1243 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) && 1244 (result->ist_tpgt_tag == tag)) { 1245 iscsit_sess_hold(result); 1246 UNLOCK_FOR_SESS_LOOKUP(tgt); 1247 return (result); 1248 } 1249 1250 result = avl_nearest(sess_avl, where, AVL_AFTER); 1251 if ((result != NULL) && 1252 (strcmp(result->ist_initiator_name, initiator_name) == 0) && 1253 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) && 1254 (result->ist_tpgt_tag == tag)) { 1255 iscsit_sess_hold(result); 1256 UNLOCK_FOR_SESS_LOOKUP(tgt); 1257 return (result); 1258 } 1259 1260 UNLOCK_FOR_SESS_LOOKUP(tgt); 1261 1262 return (NULL); 1263 } 1264 1265 static idm_status_t 1266 iscsit_tgt_merge_tpgt(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt, 1267 list_t *tpgt_del_list) 1268 { 1269 iscsit_tpgt_t *tpgt, *next_tpgt; 1270 it_tpgt_t *cfg_tpgt; 1271 1272 /* 1273 * 1. >> Lock << 1274 * 2. Removing all objects and place on a temp list 1275 * 3. Add new objects 1276 * 4. >> Unlock << 1277 * 5. tpgt_del_list contains deleted objects 1278 */ 1279 ASSERT(avl_is_empty(&tgt->target_tpgt_list) || 1280 (tpgt_del_list != NULL)); 1281 1282 if (tpgt_del_list) { 1283 for (tpgt = avl_first(&tgt->target_tpgt_list); 1284 tpgt != NULL; tpgt = next_tpgt) { 1285 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt); 1286 avl_remove(&tgt->target_tpgt_list, tpgt); 1287 if (tgt->target_state == TS_STMF_ONLINE) { 1288 tpgt->tpgt_needs_tpg_offline = B_TRUE; 1289 } 1290 list_insert_tail(tpgt_del_list, tpgt); 1291 } 1292 } 1293 1294 if (cfg_tgt->tgt_tpgt_list == NULL) { 1295 tpgt = iscsit_tpgt_create_default(); 1296 if (tgt->target_state == TS_STMF_ONLINE) { 1297 (void) iscsit_tpg_online(tpgt->tpgt_tpg); 1298 } 1299 avl_add(&tgt->target_tpgt_list, tpgt); 1300 } else { 1301 /* Add currently defined TPGTs */ 1302 for (cfg_tpgt = cfg_tgt->tgt_tpgt_list; 1303 cfg_tpgt != NULL; 1304 cfg_tpgt = cfg_tpgt->tpgt_next) { 1305 tpgt = iscsit_tpgt_create(cfg_tpgt); 1306 if (tpgt == NULL) 1307 goto tpgt_merge_error; 1308 if (tgt->target_state == TS_STMF_ONLINE) { 1309 (void) iscsit_tpg_online(tpgt->tpgt_tpg); 1310 } 1311 avl_add(&tgt->target_tpgt_list, tpgt); 1312 } 1313 } 1314 1315 return (IDM_STATUS_SUCCESS); 1316 1317 tpgt_merge_error: 1318 /* 1319 * This is a problem in configuration we received so it should never 1320 * happen. That's good because we're probably no longer in a state 1321 * requested by the user -- all the unbind operations have already 1322 * taken place. 1323 */ 1324 return (IDM_STATUS_FAIL); 1325 } 1326 1327 static iscsit_tpgt_t * 1328 iscsit_tpgt_create(it_tpgt_t *cfg_tpgt) 1329 { 1330 iscsit_tpg_t *tpg; 1331 iscsit_tpgt_t *result; 1332 1333 /* This takes a reference on the TPG */ 1334 tpg = iscsit_tpg_lookup_locked(cfg_tpgt->tpgt_tpg_name); 1335 if (tpg == NULL) 1336 return (NULL); 1337 1338 result = kmem_zalloc(sizeof (*result), KM_SLEEP); 1339 1340 result->tpgt_tpg = tpg; 1341 result->tpgt_tag = cfg_tpgt->tpgt_tag; 1342 1343 return (result); 1344 } 1345 1346 iscsit_tpgt_t * 1347 iscsit_tpgt_create_default() 1348 { 1349 iscsit_tpgt_t *result; 1350 1351 result = kmem_zalloc(sizeof (*result), KM_SLEEP); 1352 1353 result->tpgt_tpg = iscsit_global.global_default_tpg; 1354 iscsit_tpg_hold(result->tpgt_tpg); 1355 result->tpgt_tag = ISCSIT_DEFAULT_TPGT; 1356 1357 return (result); 1358 } 1359 1360 void 1361 iscsit_tpgt_destroy(iscsit_tpgt_t *tpgt) 1362 { 1363 if (tpgt->tpgt_needs_tpg_offline) { 1364 iscsit_tpg_offline(tpgt->tpgt_tpg); 1365 } 1366 iscsit_tpg_rele(tpgt->tpgt_tpg); 1367 kmem_free(tpgt, sizeof (*tpgt)); 1368 } 1369 1370 void 1371 iscsit_tpgt_hold(iscsit_tpgt_t *tpgt) 1372 { 1373 idm_refcnt_hold(&tpgt->tpgt_refcnt); 1374 } 1375 1376 void 1377 iscsit_tpgt_rele(iscsit_tpgt_t *tpgt) 1378 { 1379 idm_refcnt_rele(&tpgt->tpgt_refcnt); 1380 } 1381 1382 int 1383 iscsit_tpgt_avl_compare(const void *void_tpgt1, const void *void_tpgt2) 1384 { 1385 const iscsit_tpgt_t *tpgt1 = void_tpgt1; 1386 const iscsit_tpgt_t *tpgt2 = void_tpgt2; 1387 1388 if (tpgt1->tpgt_tag < tpgt2->tpgt_tag) 1389 return (-1); 1390 else if (tpgt1->tpgt_tag > tpgt2->tpgt_tag) 1391 return (1); 1392 1393 return (0); 1394 } 1395 1396 static idm_status_t 1397 iscsit_tgt_online(iscsit_tgt_t *tgt) 1398 { 1399 iscsit_tpgt_t *tpgt, *tpgt_fail; 1400 idm_status_t rc; 1401 1402 mutex_enter(&tgt->target_mutex); 1403 1404 ASSERT(tgt->target_sess_list.avl_numnodes == 0); 1405 idm_refcnt_reset(&tgt->target_sess_refcnt); 1406 for (tpgt = avl_first(&tgt->target_tpgt_list); 1407 tpgt != NULL; 1408 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1409 rc = iscsit_tpg_online(tpgt->tpgt_tpg); 1410 if (rc != IDM_STATUS_SUCCESS) { 1411 tpgt_fail = tpgt; 1412 goto tgt_online_fail; 1413 } 1414 } 1415 1416 mutex_exit(&tgt->target_mutex); 1417 1418 return (IDM_STATUS_SUCCESS); 1419 1420 tgt_online_fail: 1421 /* Offline all the tpgs we successfully onlined up to the failure */ 1422 for (tpgt = avl_first(&tgt->target_tpgt_list); 1423 tpgt != tpgt_fail; 1424 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1425 iscsit_tpg_offline(tpgt->tpgt_tpg); 1426 } 1427 mutex_exit(&tgt->target_mutex); 1428 return (rc); 1429 } 1430 1431 static void 1432 iscsit_tgt_offline_cb(void *tgt_void) 1433 { 1434 iscsit_tgt_t *tgt = tgt_void; 1435 stmf_change_status_t scs; 1436 1437 iscsit_tgt_sm_event(tgt, TE_OFFLINE_COMPLETE); 1438 1439 scs.st_completion_status = STMF_SUCCESS; 1440 scs.st_additional_info = NULL; 1441 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE_COMPLETE, 1442 tgt->target_stmf_lport, &scs); 1443 } 1444 1445 static void 1446 iscsit_tgt_offline(iscsit_tgt_t *tgt) 1447 { 1448 iscsit_tpgt_t *tpgt; 1449 iscsit_sess_t *ist; 1450 1451 mutex_enter(&tgt->target_mutex); 1452 1453 /* Offline target portal groups */ 1454 for (tpgt = avl_first(&tgt->target_tpgt_list); 1455 tpgt != NULL; 1456 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1457 iscsit_tpg_offline(tpgt->tpgt_tpg); 1458 } 1459 1460 /* Close any active sessions */ 1461 for (ist = avl_first(&tgt->target_sess_list); 1462 ist != NULL; 1463 ist = AVL_NEXT(&tgt->target_sess_list, ist)) { 1464 /* 1465 * This is not a synchronous operation but after all 1466 * sessions have been cleaned up there will be no 1467 * more session-related holds on the target. 1468 */ 1469 iscsit_sess_close(ist); 1470 } 1471 1472 mutex_exit(&tgt->target_mutex); 1473 1474 /* 1475 * Wait for all the sessions to quiesce. 1476 */ 1477 idm_refcnt_async_wait_ref(&tgt->target_sess_refcnt, 1478 &iscsit_tgt_offline_cb); 1479 } 1480 1481 it_cfg_status_t 1482 iscsit_config_merge_tpg(it_config_t *cfg, list_t *tpg_del_list) 1483 { 1484 it_tpg_t *cfg_tpg; 1485 iscsit_tpg_t *tpg, *next_tpg; 1486 1487 /* 1488 * 1. >> Lock << 1489 * 2. Removing deleted objects and place on a temp list 1490 * 3. Add new objects 1491 * 4. >> Unlock << 1492 * 5. tpg_del_list contains objects to destroy 1493 */ 1494 for (tpg = avl_first(&iscsit_global.global_tpg_list); 1495 tpg != NULL; 1496 tpg = next_tpg) { 1497 next_tpg = AVL_NEXT(&iscsit_global.global_tpg_list, tpg); 1498 1499 if (it_tpg_lookup(cfg, tpg->tpg_name) == NULL) { 1500 /* 1501 * The policy around when to allow a target portal 1502 * group to be deleted is implemented in libiscsit. 1503 * By the time the request gets to the kernel module 1504 * we expect that it conforms to policy so we will 1505 * cleanup all references to TPG and destroy it if it 1506 * is possible to do so. 1507 * 1508 */ 1509 avl_remove(&iscsit_global.global_tpg_list, tpg); 1510 list_insert_tail(tpg_del_list, tpg); 1511 } 1512 } 1513 1514 /* Now walk through the list of configured target portal groups */ 1515 for (cfg_tpg = cfg->config_tpg_list; 1516 cfg_tpg != NULL; 1517 cfg_tpg = cfg_tpg->tpg_next) { 1518 /* See if we have an existing target portal group */ 1519 tpg = iscsit_tpg_lookup_locked(cfg_tpg->tpg_name); 1520 1521 if (tpg == NULL) { 1522 tpg = iscsit_tpg_create(cfg_tpg); 1523 ASSERT(tpg != NULL); 1524 avl_add(&iscsit_global.global_tpg_list, tpg); 1525 } else { 1526 mutex_enter(&tpg->tpg_mutex); 1527 iscsit_tpg_modify(tpg, cfg_tpg); 1528 mutex_exit(&tpg->tpg_mutex); 1529 iscsit_tpg_rele(tpg); 1530 } 1531 } 1532 1533 return (ITCFG_SUCCESS); 1534 } 1535 1536 1537 void 1538 iscsit_config_destroy_tpgs(list_t *tpg_del_list) 1539 { 1540 iscsit_tpg_t *tpg, *next_tpg; 1541 1542 /* Now finish destroying the target portal groups */ 1543 for (tpg = list_head(tpg_del_list); 1544 tpg != NULL; 1545 tpg = next_tpg) { 1546 next_tpg = list_next(tpg_del_list, tpg); 1547 list_remove(tpg_del_list, tpg); 1548 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1549 1550 /* Kill it */ 1551 iscsit_tpg_destroy(tpg); 1552 } 1553 } 1554 1555 iscsit_tpg_t * 1556 iscsit_tpg_lookup(char *tpg_name) 1557 { 1558 iscsit_tpg_t *result; 1559 1560 ISCSIT_GLOBAL_LOCK(RW_READER); 1561 result = iscsit_tpg_lookup_locked(tpg_name); 1562 ISCSIT_GLOBAL_UNLOCK(); 1563 1564 return (result); 1565 } 1566 1567 static iscsit_tpg_t * 1568 iscsit_tpg_lookup_locked(char *tpg_name) 1569 { 1570 iscsit_tpg_t tmp_tpg; 1571 iscsit_tpg_t *result; 1572 1573 (void) strlcpy(tmp_tpg.tpg_name, tpg_name, MAX_ISCSI_NODENAMELEN); 1574 if ((result = avl_find(&iscsit_global.global_tpg_list, 1575 &tmp_tpg, NULL)) != NULL) { 1576 iscsit_tpg_hold(result); 1577 } 1578 1579 return (result); 1580 } 1581 1582 iscsit_tpg_t * 1583 iscsit_tpg_create(it_tpg_t *cfg_tpg) 1584 { 1585 iscsit_tpg_t *tpg; 1586 1587 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP); 1588 1589 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL); 1590 (void) strlcpy(tpg->tpg_name, cfg_tpg->tpg_name, MAX_TPG_NAMELEN); 1591 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare, 1592 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln)); 1593 idm_refcnt_init(&tpg->tpg_refcnt, tpg); 1594 1595 mutex_enter(&tpg->tpg_mutex); 1596 iscsit_tpg_modify(tpg, cfg_tpg); 1597 mutex_exit(&tpg->tpg_mutex); 1598 iscsit_global_hold(); 1599 1600 return (tpg); 1601 } 1602 1603 static void 1604 iscsit_tpg_modify(iscsit_tpg_t *tpg, it_tpg_t *cfg_tpg) 1605 { 1606 iscsit_portal_t *portal, *next_portal; 1607 it_portal_t *cfg_portal; 1608 1609 /* Update portals */ 1610 for (portal = avl_first(&tpg->tpg_portal_list); 1611 portal != NULL; 1612 portal = next_portal) { 1613 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal); 1614 if (it_portal_lookup(cfg_tpg, &portal->portal_addr) == NULL) { 1615 avl_remove(&tpg->tpg_portal_list, portal); 1616 iscsit_portal_destroy(portal); 1617 } 1618 } 1619 1620 for (cfg_portal = cfg_tpg->tpg_portal_list; 1621 cfg_portal != NULL; 1622 cfg_portal = cfg_portal->next) { 1623 if ((portal = iscsit_tpg_portal_lookup_locked(tpg, 1624 &cfg_portal->portal_addr)) == NULL) { 1625 (void) iscsit_portal_create(tpg, 1626 &cfg_portal->portal_addr); 1627 } else { 1628 iscsit_portal_rele(portal); 1629 } 1630 } 1631 } 1632 1633 void 1634 iscsit_tpg_destroy(iscsit_tpg_t *tpg) 1635 { 1636 iscsit_portal_t *portal, *next_portal; 1637 1638 for (portal = avl_first(&tpg->tpg_portal_list); 1639 portal != NULL; 1640 portal = next_portal) { 1641 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal); 1642 avl_remove(&tpg->tpg_portal_list, portal); 1643 iscsit_portal_destroy(portal); 1644 } 1645 1646 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1647 idm_refcnt_destroy(&tpg->tpg_refcnt); 1648 avl_destroy(&tpg->tpg_portal_list); 1649 mutex_destroy(&tpg->tpg_mutex); 1650 kmem_free(tpg, sizeof (*tpg)); 1651 iscsit_global_rele(); 1652 } 1653 1654 void 1655 iscsit_tpg_hold(iscsit_tpg_t *tpg) 1656 { 1657 idm_refcnt_hold(&tpg->tpg_refcnt); 1658 } 1659 1660 void 1661 iscsit_tpg_rele(iscsit_tpg_t *tpg) 1662 { 1663 idm_refcnt_rele(&tpg->tpg_refcnt); 1664 } 1665 1666 iscsit_tpg_t * 1667 iscsit_tpg_createdefault() 1668 { 1669 iscsit_tpg_t *tpg; 1670 1671 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP); 1672 1673 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL); 1674 (void) strlcpy(tpg->tpg_name, ISCSIT_DEFAULT_TPG, MAX_TPG_NAMELEN); 1675 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare, 1676 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln)); 1677 idm_refcnt_init(&tpg->tpg_refcnt, tpg); 1678 1679 /* Now create default portal */ 1680 if (iscsit_portal_create(tpg, NULL) == NULL) { 1681 iscsit_tpg_destroy(tpg); 1682 return (NULL); 1683 } 1684 1685 return (tpg); 1686 } 1687 1688 void 1689 iscsit_tpg_destroydefault(iscsit_tpg_t *tpg) 1690 { 1691 iscsit_portal_t *portal; 1692 1693 portal = avl_first(&tpg->tpg_portal_list); 1694 ASSERT(portal != NULL); 1695 avl_remove(&tpg->tpg_portal_list, portal); 1696 iscsit_portal_destroy(portal); 1697 1698 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1699 idm_refcnt_destroy(&tpg->tpg_refcnt); 1700 avl_destroy(&tpg->tpg_portal_list); 1701 mutex_destroy(&tpg->tpg_mutex); 1702 kmem_free(tpg, sizeof (*tpg)); 1703 } 1704 1705 int 1706 iscsit_tpg_avl_compare(const void *void_tpg1, const void *void_tpg2) 1707 { 1708 const iscsit_tpg_t *tpg1 = void_tpg1; 1709 const iscsit_tpg_t *tpg2 = void_tpg2; 1710 int result; 1711 1712 /* 1713 * Sort by ISID first then TSIH 1714 */ 1715 result = strcmp(tpg1->tpg_name, tpg2->tpg_name); 1716 if (result < 0) { 1717 return (-1); 1718 } else if (result > 0) { 1719 return (1); 1720 } 1721 1722 return (0); 1723 } 1724 1725 idm_status_t 1726 iscsit_tpg_online(iscsit_tpg_t *tpg) 1727 { 1728 iscsit_portal_t *portal, *portal_fail; 1729 idm_status_t rc; 1730 1731 mutex_enter(&tpg->tpg_mutex); 1732 if (tpg->tpg_online == 0) { 1733 for (portal = avl_first(&tpg->tpg_portal_list); 1734 portal != NULL; 1735 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1736 rc = iscsit_portal_online(portal); 1737 if (rc != IDM_STATUS_SUCCESS) { 1738 portal_fail = portal; 1739 goto tpg_online_fail; 1740 } 1741 } 1742 } 1743 tpg->tpg_online++; 1744 1745 mutex_exit(&tpg->tpg_mutex); 1746 return (IDM_STATUS_SUCCESS); 1747 1748 tpg_online_fail: 1749 /* Offline all the portals we successfully onlined up to the failure */ 1750 for (portal = avl_first(&tpg->tpg_portal_list); 1751 portal != portal_fail; 1752 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1753 iscsit_portal_offline(portal); 1754 } 1755 mutex_exit(&tpg->tpg_mutex); 1756 return (rc); 1757 } 1758 1759 void 1760 iscsit_tpg_offline(iscsit_tpg_t *tpg) 1761 { 1762 iscsit_portal_t *portal; 1763 1764 mutex_enter(&tpg->tpg_mutex); 1765 tpg->tpg_online--; 1766 if (tpg->tpg_online == 0) { 1767 for (portal = avl_first(&tpg->tpg_portal_list); 1768 portal != NULL; 1769 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1770 iscsit_portal_offline(portal); 1771 } 1772 } 1773 mutex_exit(&tpg->tpg_mutex); 1774 } 1775 1776 iscsit_portal_t * 1777 iscsit_tpg_portal_lookup(iscsit_tpg_t *tpg, struct sockaddr_storage *sa) 1778 { 1779 iscsit_portal_t *result; 1780 1781 mutex_enter(&tpg->tpg_mutex); 1782 result = iscsit_tpg_portal_lookup_locked(tpg, sa); 1783 mutex_exit(&tpg->tpg_mutex); 1784 1785 return (result); 1786 } 1787 1788 static iscsit_portal_t * 1789 iscsit_tpg_portal_lookup_locked(iscsit_tpg_t *tpg, 1790 struct sockaddr_storage *sa) 1791 { 1792 iscsit_portal_t tmp_portal; 1793 iscsit_portal_t *result; 1794 1795 /* Caller holds tpg->tpg_mutex */ 1796 bcopy(sa, &tmp_portal.portal_addr, sizeof (*sa)); 1797 if ((result = avl_find(&tpg->tpg_portal_list, &tmp_portal, NULL)) != 1798 NULL) { 1799 iscsit_portal_hold(result); 1800 } 1801 1802 return (result); 1803 } 1804 1805 iscsit_portal_t * 1806 iscsit_portal_create(iscsit_tpg_t *tpg, struct sockaddr_storage *sa) 1807 { 1808 iscsit_portal_t *portal; 1809 1810 portal = kmem_zalloc(sizeof (*portal), KM_SLEEP); 1811 /* 1812 * If (sa == NULL) then we are being asked to create the default 1813 * portal -- targets will use this portal when no portals are 1814 * explicitly configured. 1815 */ 1816 if (sa == NULL) { 1817 portal->portal_default = B_TRUE; 1818 } else { 1819 portal->portal_default = B_FALSE; 1820 bcopy(sa, &portal->portal_addr, sizeof (*sa)); 1821 } 1822 1823 idm_refcnt_init(&portal->portal_refcnt, portal); 1824 1825 /* 1826 * Add this portal to the list 1827 */ 1828 avl_add(&tpg->tpg_portal_list, portal); 1829 1830 return (portal); 1831 } 1832 1833 void 1834 iscsit_portal_destroy(iscsit_portal_t *portal) 1835 { 1836 ASSERT(portal->portal_svc == NULL); 1837 idm_refcnt_destroy(&portal->portal_refcnt); 1838 kmem_free(portal, sizeof (*portal)); 1839 } 1840 1841 void 1842 iscsit_portal_hold(iscsit_portal_t *portal) 1843 { 1844 idm_refcnt_hold(&portal->portal_refcnt); 1845 } 1846 1847 void 1848 iscsit_portal_rele(iscsit_portal_t *portal) 1849 { 1850 idm_refcnt_rele(&portal->portal_refcnt); 1851 } 1852 1853 int 1854 iscsit_portal_avl_compare(const void *void_portal1, const void *void_portal2) 1855 { 1856 const iscsit_portal_t *portal1 = void_portal1; 1857 const iscsit_portal_t *portal2 = void_portal2; 1858 const struct sockaddr_storage *ss1, *ss2; 1859 const struct in_addr *in1, *in2; 1860 const struct in6_addr *in61, *in62; 1861 int i; 1862 1863 /* 1864 * Compare ports, then address family, then ip address 1865 */ 1866 ss1 = &portal1->portal_addr; 1867 ss2 = &portal2->portal_addr; 1868 if (((struct sockaddr_in *)ss1)->sin_port != 1869 ((struct sockaddr_in *)ss2)->sin_port) { 1870 if (((struct sockaddr_in *)ss1)->sin_port > 1871 ((struct sockaddr_in *)ss2)->sin_port) 1872 return (1); 1873 else 1874 return (-1); 1875 } 1876 1877 /* 1878 * ports are the same 1879 */ 1880 if (ss1->ss_family != ss2->ss_family) { 1881 if (ss1->ss_family == AF_INET) 1882 return (1); 1883 else 1884 return (-1); 1885 } 1886 /* 1887 * address families are the same 1888 */ 1889 if (ss1->ss_family == AF_INET) { 1890 in1 = &((struct sockaddr_in *)ss1)->sin_addr; 1891 in2 = &((struct sockaddr_in *)ss2)->sin_addr; 1892 1893 if (in1->s_addr > in2->s_addr) 1894 return (1); 1895 else if (in1->s_addr < in2->s_addr) 1896 return (-1); 1897 else 1898 return (0); 1899 } else if (ss1->ss_family == AF_INET6) { 1900 in61 = &((struct sockaddr_in6 *)ss1)->sin6_addr; 1901 in62 = &((struct sockaddr_in6 *)ss2)->sin6_addr; 1902 1903 for (i = 0; i < 4; i++) { 1904 if (in61->s6_addr32[i] > in62->s6_addr32[i]) 1905 return (1); 1906 else if (in61->s6_addr32[i] < in62->s6_addr32[i]) 1907 return (-1); 1908 } 1909 return (0); 1910 } else 1911 cmn_err(CE_WARN, 1912 "iscsit_portal_avl_compare: unknown ss_family %d", 1913 ss1->ss_family); 1914 1915 return (1); 1916 } 1917 1918 1919 idm_status_t 1920 iscsit_portal_online(iscsit_portal_t *portal) 1921 { 1922 idm_status_t rc = 0; 1923 idm_svc_t *svc; 1924 idm_svc_req_t sr; 1925 uint16_t port; 1926 struct sockaddr_in *sin; 1927 1928 /* Caller holds parent TPG mutex */ 1929 if (portal->portal_online == 0) { 1930 /* 1931 * If there is no existing IDM service instance for this port, 1932 * create one. If the service exists, then the lookup, 1933 * creates a reference on the existing service. 1934 */ 1935 sin = (struct sockaddr_in *)&portal->portal_addr; 1936 port = ntohs(sin->sin_port); 1937 if (port == 0) 1938 port = ISCSI_LISTEN_PORT; 1939 ASSERT(portal->portal_svc == NULL); 1940 if ((svc = idm_tgt_svc_lookup(port)) == NULL) { 1941 sr.sr_port = port; 1942 sr.sr_li = iscsit_global.global_li; 1943 sr.sr_conn_ops.icb_rx_scsi_cmd = &iscsit_op_scsi_cmd; 1944 sr.sr_conn_ops.icb_rx_scsi_rsp = NULL; 1945 sr.sr_conn_ops.icb_rx_misc = &iscsit_rx_pdu; 1946 sr.sr_conn_ops.icb_rx_error = &iscsit_rx_pdu_error; 1947 sr.sr_conn_ops.icb_task_aborted = &iscsit_task_aborted; 1948 sr.sr_conn_ops.icb_client_notify = 1949 &iscsit_client_notify; 1950 sr.sr_conn_ops.icb_build_hdr = &iscsit_build_hdr; 1951 sr.sr_conn_ops.icb_update_statsn = 1952 &iscsit_update_statsn; 1953 sr.sr_conn_ops.icb_keepalive = &iscsit_keepalive; 1954 1955 if (idm_tgt_svc_create(&sr, &svc) != 1956 IDM_STATUS_SUCCESS) { 1957 return (IDM_STATUS_FAIL); 1958 } 1959 1960 /* Get reference on the service we just created */ 1961 idm_tgt_svc_hold(svc); 1962 } 1963 if ((rc = idm_tgt_svc_online(svc)) != IDM_STATUS_SUCCESS) { 1964 idm_tgt_svc_rele_and_destroy(svc); 1965 return (IDM_STATUS_FAIL); 1966 } 1967 portal->portal_svc = svc; 1968 1969 /* 1970 * Only call iSNS for first online 1971 */ 1972 iscsit_isns_portal_online(portal); 1973 } 1974 1975 portal->portal_online++; 1976 1977 return (rc); 1978 } 1979 1980 void 1981 iscsit_portal_offline(iscsit_portal_t *portal) 1982 { 1983 portal->portal_online--; 1984 1985 if (portal->portal_online == 0) { 1986 /* 1987 * Only call iSNS for last offline 1988 */ 1989 iscsit_isns_portal_offline(portal); 1990 idm_tgt_svc_offline(portal->portal_svc); 1991 /* If service is unreferenced, destroy it too */ 1992 idm_tgt_svc_rele_and_destroy(portal->portal_svc); 1993 portal->portal_svc = NULL; 1994 } 1995 1996 } 1997 1998 it_cfg_status_t 1999 iscsit_config_merge_ini(it_config_t *cfg) 2000 { 2001 iscsit_ini_t *ini, *next_ini; 2002 it_ini_t *cfg_ini; 2003 2004 /* 2005 * Initiator objects are so simple we will just destroy all the current 2006 * objects and build new ones. Nothing should ever reference an 2007 * initator object.. instead just lookup the initiator object and 2008 * grab the properties while holding the global config lock. 2009 */ 2010 for (ini = avl_first(&iscsit_global.global_ini_list); 2011 ini != NULL; 2012 ini = next_ini) { 2013 next_ini = AVL_NEXT(&iscsit_global.global_ini_list, ini); 2014 avl_remove(&iscsit_global.global_ini_list, ini); 2015 nvlist_free(ini->ini_props); 2016 kmem_free(ini, sizeof (*ini)); 2017 iscsit_global_rele(); 2018 } 2019 2020 for (cfg_ini = cfg->config_ini_list; 2021 cfg_ini != NULL; 2022 cfg_ini = cfg_ini->ini_next) { 2023 ini = kmem_zalloc(sizeof (iscsit_ini_t), KM_SLEEP); 2024 (void) strlcpy(ini->ini_name, cfg_ini->ini_name, 2025 MAX_ISCSI_NODENAMELEN); 2026 (void) nvlist_dup(cfg_ini->ini_properties, &ini->ini_props, 2027 KM_SLEEP); 2028 avl_add(&iscsit_global.global_ini_list, ini); 2029 iscsit_global_hold(); 2030 } 2031 2032 return (ITCFG_SUCCESS); 2033 } 2034 2035 int 2036 iscsit_ini_avl_compare(const void *void_ini1, const void *void_ini2) 2037 { 2038 const iscsit_ini_t *ini1 = void_ini1; 2039 const iscsit_ini_t *ini2 = void_ini2; 2040 int result; 2041 2042 /* 2043 * Sort by ISID first then TSIH 2044 */ 2045 result = strcmp(ini1->ini_name, ini2->ini_name); 2046 if (result < 0) { 2047 return (-1); 2048 } else if (result > 0) { 2049 return (1); 2050 } 2051 2052 return (0); 2053 } 2054 2055 iscsit_ini_t * 2056 iscsit_ini_lookup_locked(char *ini_name) 2057 { 2058 iscsit_ini_t tmp_ini; 2059 iscsit_ini_t *result; 2060 2061 /* 2062 * Use a dummy target for lookup, filling in all fields used in AVL 2063 * comparison. 2064 */ 2065 (void) strlcpy(tmp_ini.ini_name, ini_name, MAX_ISCSI_NODENAMELEN); 2066 result = avl_find(&iscsit_global.global_ini_list, &tmp_ini, NULL); 2067 2068 return (result); 2069 } 2070