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 2010 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_delete(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 it_cfg_status_t itrc = ITCFG_SUCCESS; 769 770 771 /* 772 * 1. >> Lock << 773 * 2. Removing deleted objects 774 * 3. Add deleted targets to global delete list 775 * 4. "delete" event to target state machine 776 * 5. >> Unlock << 777 * 6. Create new targets, update modified targets 778 */ 779 for (tgt = avl_first(&iscsit_global.global_target_list); 780 tgt != NULL; 781 tgt = next_tgt) { 782 next_tgt = AVL_NEXT(&iscsit_global.global_target_list, tgt); 783 784 if (it_tgt_lookup(cfg, tgt->target_name) == NULL) { 785 avl_remove(&iscsit_global.global_target_list, tgt); 786 list_insert_tail( 787 &iscsit_global.global_deleted_target_list, tgt); 788 iscsit_tgt_sm_event(tgt, TE_DELETE); 789 } 790 } 791 792 /* Now walk through the list of configured targets */ 793 for (cfg_tgt = cfg->config_tgt_list; 794 cfg_tgt != NULL; 795 cfg_tgt = cfg_tgt->tgt_next) { 796 /* See if we have an existing target */ 797 tgt = iscsit_tgt_lookup_locked(cfg_tgt->tgt_name); 798 799 if (tgt == NULL) { 800 tgt = iscsit_tgt_create(cfg_tgt); 801 if (tgt == NULL) 802 return (ITCFG_TGT_CREATE_ERR); 803 avl_add(&iscsit_global.global_target_list, tgt); 804 } else { 805 if (iscsit_tgt_modify(tgt, cfg_tgt) != 806 IDM_STATUS_SUCCESS) 807 itrc = ITCFG_MISC_ERR; 808 iscsit_tgt_rele(tgt); 809 } 810 } 811 812 /* 813 * Targets on the iscsit_global.global_deleted_target_list will remove 814 * and destroy themselves when their associated state machines reach 815 * the TS_DELETED state and all references are released. 816 */ 817 return (itrc); 818 } 819 820 iscsit_tgt_t * 821 iscsit_tgt_lookup(char *target_name) 822 { 823 iscsit_tgt_t *result; 824 825 ISCSIT_GLOBAL_LOCK(RW_READER); 826 result = iscsit_tgt_lookup_locked(target_name); 827 ISCSIT_GLOBAL_UNLOCK(); 828 829 return (result); 830 } 831 832 iscsit_tgt_t * 833 iscsit_tgt_lookup_locked(char *target_name) 834 { 835 iscsit_tgt_t tmp_tgt; 836 iscsit_tgt_t *result; 837 838 /* 839 * Use a dummy target for lookup, filling in all fields used in AVL 840 * comparison. 841 */ 842 tmp_tgt.target_name = target_name; 843 if ((result = avl_find(&iscsit_global.global_target_list, 844 &tmp_tgt, NULL)) != NULL) { 845 iscsit_tgt_hold(result); 846 } 847 848 return (result); 849 } 850 851 iscsit_tgt_t * 852 iscsit_tgt_create(it_tgt_t *cfg_tgt) 853 { 854 iscsit_tgt_t *result; 855 stmf_local_port_t *lport; 856 857 /* 858 * Each target is an STMF local port. 859 */ 860 lport = stmf_alloc(STMF_STRUCT_STMF_LOCAL_PORT, 861 sizeof (iscsit_tgt_t) + sizeof (scsi_devid_desc_t) + 862 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN) + 1, 0); 863 if (lport == NULL) { 864 return (NULL); 865 } 866 867 result = lport->lport_port_private; 868 result->target_state = TS_CREATED; 869 result->target_stmf_lport_registered = 0; 870 /* Use pointer arithmetic to find scsi_devid_desc_t */ 871 result->target_devid = (scsi_devid_desc_t *)(result + 1); 872 (void) strcpy((char *)result->target_devid->ident, cfg_tgt->tgt_name); 873 result->target_devid->ident_length = 874 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN); 875 result->target_devid->protocol_id = PROTOCOL_iSCSI; 876 result->target_devid->piv = 1; 877 result->target_devid->code_set = CODE_SET_ASCII; 878 result->target_devid->association = ID_IS_TARGET_PORT; 879 880 /* Store a shortcut to the target name */ 881 result->target_name = (char *)result->target_devid->ident; 882 idm_sm_audit_init(&result->target_state_audit); 883 mutex_init(&result->target_mutex, NULL, MUTEX_DEFAULT, NULL); 884 avl_create(&result->target_sess_list, iscsit_sess_avl_compare, 885 sizeof (iscsit_sess_t), offsetof(iscsit_sess_t, ist_tgt_ln)); 886 avl_create(&result->target_tpgt_list, iscsit_tpgt_avl_compare, 887 sizeof (iscsit_tpgt_t), offsetof(iscsit_tpgt_t, tpgt_tgt_ln)); 888 list_create(&result->target_events, sizeof (tgt_event_ctx_t), 889 offsetof(tgt_event_ctx_t, te_ctx_node)); 890 idm_refcnt_init(&result->target_refcnt, result); 891 idm_refcnt_init(&result->target_sess_refcnt, result); 892 893 /* Finish initializing local port */ 894 /* 895 * Would like infinite timeout, but this is about as long as can 896 * be specified to stmf on a 32 bit kernel. 897 */ 898 lport->lport_abort_timeout = 2000; /* seconds */ 899 lport->lport_id = result->target_devid; 900 lport->lport_pp = iscsit_global.global_pp; 901 lport->lport_ds = iscsit_global.global_dbuf_store; 902 lport->lport_xfer_data = &iscsit_xfer_scsi_data; 903 lport->lport_send_status = &iscsit_send_scsi_status; 904 lport->lport_task_free = &iscsit_lport_task_free; 905 lport->lport_abort = &iscsit_abort; 906 lport->lport_ctl = &iscsit_ctl; 907 result->target_stmf_lport = lport; 908 909 /* 910 * We need a global hold until the STMF-ONLINE state machine 911 * completes. Acquire that hold now, in case we need to call 912 * iscsit_tgt_destroy, which will also release the hold. 913 */ 914 iscsit_global_hold(); 915 916 /* 917 * Additional target modifications from config 918 */ 919 if (iscsit_tgt_modify(result, cfg_tgt) != IDM_STATUS_SUCCESS) { 920 iscsit_tgt_destroy(result); 921 return (NULL); 922 } 923 924 /* 925 * Register the target with STMF but not until we have all the 926 * TPGT bindings and any other additional config setup. STMF 927 * may immediately ask us to go online. 928 */ 929 if (stmf_register_local_port(lport) != STMF_SUCCESS) { 930 iscsit_tgt_destroy(result); 931 return (NULL); 932 } 933 result->target_stmf_lport_registered = 1; 934 935 return (result); 936 } 937 938 static idm_status_t 939 iscsit_tgt_modify(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt) 940 { 941 idm_status_t idmrc = IDM_STATUS_SUCCESS; 942 list_t tpgt_del_list; 943 944 /* Merge TPGT */ 945 list_create(&tpgt_del_list, sizeof (iscsit_tpgt_t), 946 offsetof(iscsit_tpgt_t, tpgt_delete_ln)); 947 948 mutex_enter(&tgt->target_mutex); 949 if (tgt->target_props) { 950 nvlist_free(tgt->target_props); 951 tgt->target_props = NULL; 952 } 953 (void) nvlist_dup(cfg_tgt->tgt_properties, &tgt->target_props, 954 KM_SLEEP); 955 956 if ((idmrc = iscsit_tgt_merge_tpgt(tgt, cfg_tgt, &tpgt_del_list)) != 957 IDM_STATUS_SUCCESS) { 958 /* This should never happen */ 959 cmn_err(CE_WARN, "Fail to configure TPGTs for " 960 "target %s, the target modification could not be " 961 "completed.", tgt->target_name); 962 } 963 964 mutex_exit(&tgt->target_mutex); 965 966 iscsit_config_destroy_tpgts(&tpgt_del_list); 967 968 /* 969 * If the target is truly modified (not newly created), 970 * inform iSNS to update the target registration. 971 */ 972 if ((tgt->target_generation > 0) && 973 (cfg_tgt->tgt_generation > tgt->target_generation)) { 974 iscsit_isns_target_update(tgt); 975 } 976 977 tgt->target_generation = cfg_tgt->tgt_generation; 978 979 return (idmrc); 980 } 981 982 void 983 iscsit_config_destroy_tpgts(list_t *tpgt_del_list) 984 { 985 iscsit_tpgt_t *tpgt, *next_tpgt; 986 987 for (tpgt = list_head(tpgt_del_list); 988 tpgt != NULL; 989 tpgt = next_tpgt) { 990 next_tpgt = list_next(tpgt_del_list, tpgt); 991 992 list_remove(tpgt_del_list, tpgt); 993 idm_refcnt_wait_ref(&tpgt->tpgt_refcnt); 994 iscsit_tpgt_destroy(tpgt); 995 } 996 } 997 998 void 999 iscsit_tgt_unref(void *tgt_void) 1000 { 1001 iscsit_tgt_t *tgt = tgt_void; 1002 1003 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1004 list_remove(&iscsit_global.global_deleted_target_list, tgt); 1005 ISCSIT_GLOBAL_UNLOCK(); 1006 iscsit_tgt_destroy(tgt); 1007 } 1008 1009 void 1010 iscsit_tgt_async_wait_ref(iscsit_tgt_t *tgt, idm_refcnt_cb_t *cb_func) 1011 { 1012 idm_refcnt_async_wait_ref(&tgt->target_refcnt, cb_func); 1013 } 1014 1015 static void 1016 iscsit_tgt_destroy(iscsit_tgt_t *tgt) 1017 { 1018 iscsit_tpgt_t *tpgt, *next_tpgt; 1019 1020 ASSERT(tgt->target_state == TS_DELETING || 1021 (tgt->target_state == TS_CREATED && 1022 tgt->target_stmf_lport_registered == 0)); 1023 1024 /* 1025 * Destroy all target portal group tags 1026 */ 1027 mutex_enter(&tgt->target_mutex); 1028 for (tpgt = avl_first(&tgt->target_tpgt_list); 1029 tpgt != NULL; 1030 tpgt = next_tpgt) { 1031 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt); 1032 avl_remove(&tgt->target_tpgt_list, tpgt); 1033 iscsit_tpgt_destroy(tpgt); 1034 } 1035 1036 if (tgt->target_props) { 1037 nvlist_free(tgt->target_props); 1038 } 1039 mutex_exit(&tgt->target_mutex); 1040 1041 /* 1042 * Destroy target 1043 */ 1044 idm_refcnt_destroy(&tgt->target_sess_refcnt); 1045 idm_refcnt_destroy(&tgt->target_refcnt); 1046 list_destroy(&tgt->target_events); 1047 avl_destroy(&tgt->target_tpgt_list); 1048 avl_destroy(&tgt->target_sess_list); 1049 mutex_destroy(&tgt->target_mutex); 1050 stmf_free(tgt->target_stmf_lport); /* Also frees "tgt' */ 1051 iscsit_global_rele(); 1052 } 1053 1054 void 1055 iscsit_tgt_hold(iscsit_tgt_t *tgt) 1056 { 1057 idm_refcnt_hold(&tgt->target_refcnt); 1058 } 1059 1060 void 1061 iscsit_tgt_rele(iscsit_tgt_t *tgt) 1062 { 1063 idm_refcnt_rele(&tgt->target_refcnt); 1064 } 1065 1066 int 1067 iscsit_tgt_avl_compare(const void *void_tgt1, const void *void_tgt2) 1068 { 1069 const iscsit_tgt_t *tgt1 = void_tgt1; 1070 const iscsit_tgt_t *tgt2 = void_tgt2; 1071 int result; 1072 1073 /* 1074 * Sort by ISID first then TSIH 1075 */ 1076 result = strcmp(tgt1->target_name, tgt2->target_name); 1077 if (result < 0) { 1078 return (-1); 1079 } else if (result > 0) { 1080 return (1); 1081 } 1082 1083 return (0); 1084 } 1085 1086 1087 iscsit_tpgt_t * 1088 iscsit_tgt_lookup_tpgt(iscsit_tgt_t *tgt, uint16_t tag) 1089 { 1090 iscsit_tpgt_t *result; 1091 1092 mutex_enter(&tgt->target_mutex); 1093 result = iscsit_tgt_lookup_tpgt_locked(tgt, tag); 1094 mutex_exit(&tgt->target_mutex); 1095 1096 return (result); 1097 } 1098 1099 static iscsit_tpgt_t * 1100 iscsit_tgt_lookup_tpgt_locked(iscsit_tgt_t *tgt, uint16_t tag) 1101 { 1102 iscsit_tpgt_t tmp_tpgt; 1103 iscsit_tpgt_t *result; 1104 1105 /* Caller holds tgt->target_mutex */ 1106 tmp_tpgt.tpgt_tag = tag; 1107 if ((result = avl_find(&tgt->target_tpgt_list, &tmp_tpgt, NULL)) != 1108 NULL) { 1109 iscsit_tpgt_hold(result); 1110 } 1111 1112 return (result); 1113 } 1114 1115 iscsit_portal_t * 1116 iscsit_tgt_lookup_portal(iscsit_tgt_t *tgt, struct sockaddr_storage *sa, 1117 iscsit_tpgt_t **output_tpgt) 1118 { 1119 iscsit_tpgt_t *tpgt; 1120 iscsit_portal_t *portal; 1121 1122 /* Caller holds tgt->target_mutex */ 1123 ASSERT(mutex_owned(&tgt->target_mutex)); 1124 for (tpgt = avl_first(&tgt->target_tpgt_list); 1125 tpgt != NULL; 1126 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1127 portal = iscsit_tpg_portal_lookup(tpgt->tpgt_tpg, sa); 1128 if (portal) { 1129 iscsit_tpgt_hold(tpgt); 1130 *output_tpgt = tpgt; 1131 return (portal); 1132 } 1133 } 1134 1135 return (NULL); 1136 } 1137 1138 1139 void 1140 iscsit_tgt_bind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess) 1141 { 1142 if (tgt) { 1143 sess->ist_lport = tgt->target_stmf_lport; 1144 iscsit_tgt_hold(tgt); 1145 idm_refcnt_hold(&tgt->target_sess_refcnt); 1146 mutex_enter(&tgt->target_mutex); 1147 avl_add(&tgt->target_sess_list, sess); 1148 mutex_exit(&tgt->target_mutex); 1149 } else { 1150 /* Discovery session */ 1151 sess->ist_lport = NULL; 1152 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1153 avl_add(&iscsit_global.global_discovery_sessions, sess); 1154 ISCSIT_GLOBAL_UNLOCK(); 1155 } 1156 } 1157 1158 void 1159 iscsit_tgt_unbind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess) 1160 { 1161 if (tgt) { 1162 mutex_enter(&tgt->target_mutex); 1163 avl_remove(&tgt->target_sess_list, sess); 1164 mutex_exit(&tgt->target_mutex); 1165 sess->ist_tgt = (iscsit_tgt_t *)SESS_UNBOUND_FROM_TGT; 1166 idm_refcnt_rele(&tgt->target_sess_refcnt); 1167 iscsit_tgt_rele(tgt); 1168 } else { 1169 /* Discovery session */ 1170 ISCSIT_GLOBAL_LOCK(RW_WRITER); 1171 avl_remove(&iscsit_global.global_discovery_sessions, sess); 1172 ISCSIT_GLOBAL_UNLOCK(); 1173 } 1174 } 1175 1176 #define LOCK_FOR_SESS_LOOKUP(lookup_tgt) { \ 1177 if ((lookup_tgt) == NULL) { \ 1178 ISCSIT_GLOBAL_LOCK(RW_READER); \ 1179 } else { \ 1180 mutex_enter(&(lookup_tgt)->target_mutex); \ 1181 } \ 1182 } 1183 1184 #define UNLOCK_FOR_SESS_LOOKUP(lookup_tgt) { \ 1185 if ((lookup_tgt) == NULL) { \ 1186 ISCSIT_GLOBAL_UNLOCK(); \ 1187 } else { \ 1188 mutex_exit(&(lookup_tgt)->target_mutex); \ 1189 } \ 1190 } 1191 1192 iscsit_sess_t * 1193 iscsit_tgt_lookup_sess(iscsit_tgt_t *tgt, char *initiator_name, 1194 uint8_t *isid, uint16_t tsih, uint16_t tag) 1195 { 1196 iscsit_sess_t tmp_sess; 1197 avl_tree_t *sess_avl; 1198 avl_index_t where; 1199 iscsit_sess_t *result; 1200 1201 /* 1202 * If tgt is NULL then we are looking for a discovery session 1203 */ 1204 if (tgt == NULL) { 1205 sess_avl = &iscsit_global.global_discovery_sessions; 1206 } else { 1207 sess_avl = &tgt->target_sess_list; 1208 } 1209 1210 LOCK_FOR_SESS_LOOKUP(tgt); 1211 if (avl_numnodes(sess_avl) == NULL) { 1212 UNLOCK_FOR_SESS_LOOKUP(tgt); 1213 return (NULL); 1214 } 1215 1216 /* 1217 * We'll try to find a session matching ISID + TSIH first. If we 1218 * can't find one then we will return the closest match. If the 1219 * caller needs an exact match it must compare the TSIH after 1220 * the session is returned. 1221 * 1222 * The reason we do this "fuzzy matching" is to allow matching 1223 * sessions with different TSIH values on the same AVL list. This 1224 * makes session reinstatement much easier since the new session can 1225 * live on the list at the same time as the old session is cleaning up. 1226 */ 1227 bcopy(isid, tmp_sess.ist_isid, ISCSI_ISID_LEN); 1228 tmp_sess.ist_initiator_name = initiator_name; 1229 tmp_sess.ist_tsih = tsih; 1230 tmp_sess.ist_tpgt_tag = tag; 1231 1232 result = avl_find(sess_avl, &tmp_sess, &where); 1233 if (result != NULL) { 1234 iscsit_sess_hold(result); 1235 UNLOCK_FOR_SESS_LOOKUP(tgt); 1236 return (result); 1237 } 1238 1239 /* 1240 * avl_find_nearest() may return a result with a different ISID so 1241 * we should only return a result if the name and ISID match 1242 */ 1243 result = avl_nearest(sess_avl, where, AVL_BEFORE); 1244 if ((result != NULL) && 1245 (strcmp(result->ist_initiator_name, initiator_name) == 0) && 1246 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) && 1247 (result->ist_tpgt_tag == tag)) { 1248 iscsit_sess_hold(result); 1249 UNLOCK_FOR_SESS_LOOKUP(tgt); 1250 return (result); 1251 } 1252 1253 result = avl_nearest(sess_avl, where, AVL_AFTER); 1254 if ((result != NULL) && 1255 (strcmp(result->ist_initiator_name, initiator_name) == 0) && 1256 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) && 1257 (result->ist_tpgt_tag == tag)) { 1258 iscsit_sess_hold(result); 1259 UNLOCK_FOR_SESS_LOOKUP(tgt); 1260 return (result); 1261 } 1262 1263 UNLOCK_FOR_SESS_LOOKUP(tgt); 1264 1265 return (NULL); 1266 } 1267 1268 static idm_status_t 1269 iscsit_tgt_merge_tpgt(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt, 1270 list_t *tpgt_del_list) 1271 { 1272 iscsit_tpgt_t *tpgt, *next_tpgt; 1273 it_tpgt_t *cfg_tpgt; 1274 idm_status_t status = IDM_STATUS_SUCCESS; 1275 1276 /* 1277 * 1. >> Lock << 1278 * 2. Removing all objects and place on a temp list 1279 * 3. Add new objects 1280 * 4. >> Unlock << 1281 * 5. tpgt_del_list contains deleted objects 1282 */ 1283 ASSERT(avl_is_empty(&tgt->target_tpgt_list) || 1284 (tpgt_del_list != NULL)); 1285 1286 if (tpgt_del_list) { 1287 for (tpgt = avl_first(&tgt->target_tpgt_list); 1288 tpgt != NULL; tpgt = next_tpgt) { 1289 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt); 1290 avl_remove(&tgt->target_tpgt_list, tpgt); 1291 if (tgt->target_state == TS_STMF_ONLINE) { 1292 tpgt->tpgt_needs_tpg_offline = B_TRUE; 1293 } 1294 list_insert_tail(tpgt_del_list, tpgt); 1295 } 1296 } 1297 1298 if (cfg_tgt->tgt_tpgt_list != NULL) { 1299 /* Add currently defined TPGTs */ 1300 for (cfg_tpgt = cfg_tgt->tgt_tpgt_list; 1301 cfg_tpgt != NULL; 1302 cfg_tpgt = cfg_tpgt->tpgt_next) { 1303 tpgt = iscsit_tpgt_create(cfg_tpgt); 1304 if (tpgt == NULL) { 1305 /* 1306 * There is a problem in the configuration we 1307 * received from the ioctl -- a missing tpg. 1308 * All the unbind operations have already 1309 * taken place. To leave the system in a 1310 * non-panic'd state, use the default tpgt. 1311 */ 1312 status = IDM_STATUS_FAIL; 1313 continue; 1314 } 1315 if (tgt->target_state == TS_STMF_ONLINE) { 1316 (void) iscsit_tpg_online(tpgt->tpgt_tpg); 1317 } 1318 avl_add(&tgt->target_tpgt_list, tpgt); 1319 } 1320 } 1321 1322 /* If no TPGTs defined, add the default TPGT */ 1323 if (avl_numnodes(&tgt->target_tpgt_list) == 0) { 1324 tpgt = iscsit_tpgt_create_default(); 1325 if (tgt->target_state == TS_STMF_ONLINE) { 1326 (void) iscsit_tpg_online(tpgt->tpgt_tpg); 1327 } 1328 avl_add(&tgt->target_tpgt_list, tpgt); 1329 } 1330 1331 return (status); 1332 } 1333 1334 static iscsit_tpgt_t * 1335 iscsit_tpgt_create(it_tpgt_t *cfg_tpgt) 1336 { 1337 iscsit_tpg_t *tpg; 1338 iscsit_tpgt_t *result; 1339 1340 /* This takes a reference on the TPG */ 1341 tpg = iscsit_tpg_lookup_locked(cfg_tpgt->tpgt_tpg_name); 1342 if (tpg == NULL) 1343 return (NULL); 1344 1345 result = kmem_zalloc(sizeof (*result), KM_SLEEP); 1346 1347 result->tpgt_tpg = tpg; 1348 result->tpgt_tag = cfg_tpgt->tpgt_tag; 1349 1350 return (result); 1351 } 1352 1353 iscsit_tpgt_t * 1354 iscsit_tpgt_create_default() 1355 { 1356 iscsit_tpgt_t *result; 1357 1358 result = kmem_zalloc(sizeof (*result), KM_SLEEP); 1359 1360 result->tpgt_tpg = iscsit_global.global_default_tpg; 1361 iscsit_tpg_hold(result->tpgt_tpg); 1362 result->tpgt_tag = ISCSIT_DEFAULT_TPGT; 1363 1364 return (result); 1365 } 1366 1367 void 1368 iscsit_tpgt_destroy(iscsit_tpgt_t *tpgt) 1369 { 1370 if (tpgt->tpgt_needs_tpg_offline) { 1371 iscsit_tpg_offline(tpgt->tpgt_tpg); 1372 } 1373 iscsit_tpg_rele(tpgt->tpgt_tpg); 1374 kmem_free(tpgt, sizeof (*tpgt)); 1375 } 1376 1377 void 1378 iscsit_tpgt_hold(iscsit_tpgt_t *tpgt) 1379 { 1380 idm_refcnt_hold(&tpgt->tpgt_refcnt); 1381 } 1382 1383 void 1384 iscsit_tpgt_rele(iscsit_tpgt_t *tpgt) 1385 { 1386 idm_refcnt_rele(&tpgt->tpgt_refcnt); 1387 } 1388 1389 int 1390 iscsit_tpgt_avl_compare(const void *void_tpgt1, const void *void_tpgt2) 1391 { 1392 const iscsit_tpgt_t *tpgt1 = void_tpgt1; 1393 const iscsit_tpgt_t *tpgt2 = void_tpgt2; 1394 1395 if (tpgt1->tpgt_tag < tpgt2->tpgt_tag) 1396 return (-1); 1397 else if (tpgt1->tpgt_tag > tpgt2->tpgt_tag) 1398 return (1); 1399 1400 return (0); 1401 } 1402 1403 static idm_status_t 1404 iscsit_tgt_online(iscsit_tgt_t *tgt) 1405 { 1406 iscsit_tpgt_t *tpgt, *tpgt_fail; 1407 idm_status_t rc; 1408 1409 mutex_enter(&tgt->target_mutex); 1410 1411 ASSERT(tgt->target_sess_list.avl_numnodes == 0); 1412 idm_refcnt_reset(&tgt->target_sess_refcnt); 1413 for (tpgt = avl_first(&tgt->target_tpgt_list); 1414 tpgt != NULL; 1415 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1416 rc = iscsit_tpg_online(tpgt->tpgt_tpg); 1417 if (rc != IDM_STATUS_SUCCESS) { 1418 tpgt_fail = tpgt; 1419 goto tgt_online_fail; 1420 } 1421 } 1422 1423 mutex_exit(&tgt->target_mutex); 1424 1425 return (IDM_STATUS_SUCCESS); 1426 1427 tgt_online_fail: 1428 /* Offline all the tpgs we successfully onlined up to the failure */ 1429 for (tpgt = avl_first(&tgt->target_tpgt_list); 1430 tpgt != tpgt_fail; 1431 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1432 iscsit_tpg_offline(tpgt->tpgt_tpg); 1433 } 1434 mutex_exit(&tgt->target_mutex); 1435 return (rc); 1436 } 1437 1438 static void 1439 iscsit_tgt_offline_cb(void *tgt_void) 1440 { 1441 iscsit_tgt_t *tgt = tgt_void; 1442 stmf_change_status_t scs; 1443 1444 iscsit_tgt_sm_event(tgt, TE_OFFLINE_COMPLETE); 1445 1446 scs.st_completion_status = STMF_SUCCESS; 1447 scs.st_additional_info = NULL; 1448 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE_COMPLETE, 1449 tgt->target_stmf_lport, &scs); 1450 } 1451 1452 static void 1453 iscsit_tgt_offline(iscsit_tgt_t *tgt) 1454 { 1455 iscsit_tpgt_t *tpgt; 1456 iscsit_sess_t *ist; 1457 1458 mutex_enter(&tgt->target_mutex); 1459 1460 /* Offline target portal groups */ 1461 for (tpgt = avl_first(&tgt->target_tpgt_list); 1462 tpgt != NULL; 1463 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) { 1464 iscsit_tpg_offline(tpgt->tpgt_tpg); 1465 } 1466 1467 /* Close any active sessions */ 1468 for (ist = avl_first(&tgt->target_sess_list); 1469 ist != NULL; 1470 ist = AVL_NEXT(&tgt->target_sess_list, ist)) { 1471 /* 1472 * This is not a synchronous operation but after all 1473 * sessions have been cleaned up there will be no 1474 * more session-related holds on the target. 1475 */ 1476 iscsit_sess_close(ist); 1477 } 1478 1479 mutex_exit(&tgt->target_mutex); 1480 1481 /* 1482 * Wait for all the sessions to quiesce. 1483 */ 1484 idm_refcnt_async_wait_ref(&tgt->target_sess_refcnt, 1485 &iscsit_tgt_offline_cb); 1486 } 1487 1488 it_cfg_status_t 1489 iscsit_config_merge_tpg(it_config_t *cfg, list_t *tpg_del_list) 1490 { 1491 it_tpg_t *cfg_tpg; 1492 iscsit_tpg_t *tpg, *next_tpg; 1493 1494 /* 1495 * 1. >> Lock << 1496 * 2. Removing deleted objects and place on a temp list 1497 * 3. Add new objects 1498 * 4. >> Unlock << 1499 * 5. tpg_del_list contains objects to destroy 1500 */ 1501 for (tpg = avl_first(&iscsit_global.global_tpg_list); 1502 tpg != NULL; 1503 tpg = next_tpg) { 1504 next_tpg = AVL_NEXT(&iscsit_global.global_tpg_list, tpg); 1505 1506 if (it_tpg_lookup(cfg, tpg->tpg_name) == NULL) { 1507 /* 1508 * The policy around when to allow a target portal 1509 * group to be deleted is implemented in libiscsit. 1510 * By the time the request gets to the kernel module 1511 * we expect that it conforms to policy so we will 1512 * cleanup all references to TPG and destroy it if it 1513 * is possible to do so. 1514 * 1515 */ 1516 avl_remove(&iscsit_global.global_tpg_list, tpg); 1517 list_insert_tail(tpg_del_list, tpg); 1518 } 1519 } 1520 1521 /* Now walk through the list of configured target portal groups */ 1522 for (cfg_tpg = cfg->config_tpg_list; 1523 cfg_tpg != NULL; 1524 cfg_tpg = cfg_tpg->tpg_next) { 1525 /* See if we have an existing target portal group */ 1526 tpg = iscsit_tpg_lookup_locked(cfg_tpg->tpg_name); 1527 1528 if (tpg == NULL) { 1529 tpg = iscsit_tpg_create(cfg_tpg); 1530 ASSERT(tpg != NULL); 1531 avl_add(&iscsit_global.global_tpg_list, tpg); 1532 } else { 1533 mutex_enter(&tpg->tpg_mutex); 1534 iscsit_tpg_modify(tpg, cfg_tpg); 1535 mutex_exit(&tpg->tpg_mutex); 1536 iscsit_tpg_rele(tpg); 1537 } 1538 } 1539 1540 return (ITCFG_SUCCESS); 1541 } 1542 1543 1544 void 1545 iscsit_config_destroy_tpgs(list_t *tpg_del_list) 1546 { 1547 iscsit_tpg_t *tpg, *next_tpg; 1548 1549 /* Now finish destroying the target portal groups */ 1550 for (tpg = list_head(tpg_del_list); 1551 tpg != NULL; 1552 tpg = next_tpg) { 1553 next_tpg = list_next(tpg_del_list, tpg); 1554 list_remove(tpg_del_list, tpg); 1555 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1556 1557 /* Kill it */ 1558 iscsit_tpg_destroy(tpg); 1559 } 1560 } 1561 1562 iscsit_tpg_t * 1563 iscsit_tpg_lookup(char *tpg_name) 1564 { 1565 iscsit_tpg_t *result; 1566 1567 ISCSIT_GLOBAL_LOCK(RW_READER); 1568 result = iscsit_tpg_lookup_locked(tpg_name); 1569 ISCSIT_GLOBAL_UNLOCK(); 1570 1571 return (result); 1572 } 1573 1574 static iscsit_tpg_t * 1575 iscsit_tpg_lookup_locked(char *tpg_name) 1576 { 1577 iscsit_tpg_t tmp_tpg; 1578 iscsit_tpg_t *result; 1579 1580 (void) strlcpy(tmp_tpg.tpg_name, tpg_name, MAX_ISCSI_NODENAMELEN); 1581 if ((result = avl_find(&iscsit_global.global_tpg_list, 1582 &tmp_tpg, NULL)) != NULL) { 1583 iscsit_tpg_hold(result); 1584 } 1585 1586 return (result); 1587 } 1588 1589 iscsit_tpg_t * 1590 iscsit_tpg_create(it_tpg_t *cfg_tpg) 1591 { 1592 iscsit_tpg_t *tpg; 1593 1594 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP); 1595 1596 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL); 1597 (void) strlcpy(tpg->tpg_name, cfg_tpg->tpg_name, MAX_TPG_NAMELEN); 1598 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare, 1599 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln)); 1600 idm_refcnt_init(&tpg->tpg_refcnt, tpg); 1601 1602 mutex_enter(&tpg->tpg_mutex); 1603 iscsit_tpg_modify(tpg, cfg_tpg); 1604 mutex_exit(&tpg->tpg_mutex); 1605 iscsit_global_hold(); 1606 1607 return (tpg); 1608 } 1609 1610 static void 1611 iscsit_tpg_modify(iscsit_tpg_t *tpg, it_tpg_t *cfg_tpg) 1612 { 1613 iscsit_portal_t *portal, *next_portal; 1614 it_portal_t *cfg_portal; 1615 1616 /* Update portals */ 1617 for (portal = avl_first(&tpg->tpg_portal_list); 1618 portal != NULL; 1619 portal = next_portal) { 1620 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal); 1621 if (it_portal_lookup(cfg_tpg, &portal->portal_addr) == NULL) { 1622 avl_remove(&tpg->tpg_portal_list, portal); 1623 iscsit_portal_delete(portal); 1624 } 1625 } 1626 1627 for (cfg_portal = cfg_tpg->tpg_portal_list; 1628 cfg_portal != NULL; 1629 cfg_portal = cfg_portal->next) { 1630 if ((portal = iscsit_tpg_portal_lookup_locked(tpg, 1631 &cfg_portal->portal_addr)) == NULL) { 1632 (void) iscsit_portal_create(tpg, 1633 &cfg_portal->portal_addr); 1634 } else { 1635 iscsit_portal_rele(portal); 1636 } 1637 } 1638 } 1639 1640 void 1641 iscsit_tpg_destroy(iscsit_tpg_t *tpg) 1642 { 1643 iscsit_portal_t *portal, *next_portal; 1644 1645 for (portal = avl_first(&tpg->tpg_portal_list); 1646 portal != NULL; 1647 portal = next_portal) { 1648 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal); 1649 avl_remove(&tpg->tpg_portal_list, portal); 1650 iscsit_portal_delete(portal); 1651 } 1652 1653 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1654 idm_refcnt_destroy(&tpg->tpg_refcnt); 1655 avl_destroy(&tpg->tpg_portal_list); 1656 mutex_destroy(&tpg->tpg_mutex); 1657 kmem_free(tpg, sizeof (*tpg)); 1658 iscsit_global_rele(); 1659 } 1660 1661 void 1662 iscsit_tpg_hold(iscsit_tpg_t *tpg) 1663 { 1664 idm_refcnt_hold(&tpg->tpg_refcnt); 1665 } 1666 1667 void 1668 iscsit_tpg_rele(iscsit_tpg_t *tpg) 1669 { 1670 idm_refcnt_rele(&tpg->tpg_refcnt); 1671 } 1672 1673 iscsit_tpg_t * 1674 iscsit_tpg_createdefault() 1675 { 1676 iscsit_tpg_t *tpg; 1677 1678 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP); 1679 1680 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL); 1681 (void) strlcpy(tpg->tpg_name, ISCSIT_DEFAULT_TPG, MAX_TPG_NAMELEN); 1682 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare, 1683 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln)); 1684 idm_refcnt_init(&tpg->tpg_refcnt, tpg); 1685 1686 /* Now create default portal */ 1687 if (iscsit_portal_create(tpg, NULL) == NULL) { 1688 iscsit_tpg_destroy(tpg); 1689 return (NULL); 1690 } 1691 1692 return (tpg); 1693 } 1694 1695 void 1696 iscsit_tpg_destroydefault(iscsit_tpg_t *tpg) 1697 { 1698 iscsit_portal_t *portal; 1699 1700 portal = avl_first(&tpg->tpg_portal_list); 1701 ASSERT(portal != NULL); 1702 avl_remove(&tpg->tpg_portal_list, portal); 1703 iscsit_portal_delete(portal); 1704 1705 idm_refcnt_wait_ref(&tpg->tpg_refcnt); 1706 idm_refcnt_destroy(&tpg->tpg_refcnt); 1707 avl_destroy(&tpg->tpg_portal_list); 1708 mutex_destroy(&tpg->tpg_mutex); 1709 kmem_free(tpg, sizeof (*tpg)); 1710 } 1711 1712 int 1713 iscsit_tpg_avl_compare(const void *void_tpg1, const void *void_tpg2) 1714 { 1715 const iscsit_tpg_t *tpg1 = void_tpg1; 1716 const iscsit_tpg_t *tpg2 = void_tpg2; 1717 int result; 1718 1719 /* 1720 * Sort by ISID first then TSIH 1721 */ 1722 result = strcmp(tpg1->tpg_name, tpg2->tpg_name); 1723 if (result < 0) { 1724 return (-1); 1725 } else if (result > 0) { 1726 return (1); 1727 } 1728 1729 return (0); 1730 } 1731 1732 idm_status_t 1733 iscsit_tpg_online(iscsit_tpg_t *tpg) 1734 { 1735 iscsit_portal_t *portal, *portal_fail; 1736 idm_status_t rc; 1737 1738 mutex_enter(&tpg->tpg_mutex); 1739 if (tpg->tpg_online == 0) { 1740 for (portal = avl_first(&tpg->tpg_portal_list); 1741 portal != NULL; 1742 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1743 rc = iscsit_portal_online(portal); 1744 if (rc != IDM_STATUS_SUCCESS) { 1745 portal_fail = portal; 1746 goto tpg_online_fail; 1747 } 1748 } 1749 } 1750 tpg->tpg_online++; 1751 1752 mutex_exit(&tpg->tpg_mutex); 1753 return (IDM_STATUS_SUCCESS); 1754 1755 tpg_online_fail: 1756 /* Offline all the portals we successfully onlined up to the failure */ 1757 for (portal = avl_first(&tpg->tpg_portal_list); 1758 portal != portal_fail; 1759 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1760 iscsit_portal_offline(portal); 1761 } 1762 mutex_exit(&tpg->tpg_mutex); 1763 return (rc); 1764 } 1765 1766 void 1767 iscsit_tpg_offline(iscsit_tpg_t *tpg) 1768 { 1769 iscsit_portal_t *portal; 1770 1771 mutex_enter(&tpg->tpg_mutex); 1772 tpg->tpg_online--; 1773 if (tpg->tpg_online == 0) { 1774 for (portal = avl_first(&tpg->tpg_portal_list); 1775 portal != NULL; 1776 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) { 1777 iscsit_portal_offline(portal); 1778 } 1779 } 1780 mutex_exit(&tpg->tpg_mutex); 1781 } 1782 1783 iscsit_portal_t * 1784 iscsit_tpg_portal_lookup(iscsit_tpg_t *tpg, struct sockaddr_storage *sa) 1785 { 1786 iscsit_portal_t *result; 1787 1788 mutex_enter(&tpg->tpg_mutex); 1789 result = iscsit_tpg_portal_lookup_locked(tpg, sa); 1790 mutex_exit(&tpg->tpg_mutex); 1791 1792 return (result); 1793 } 1794 1795 static iscsit_portal_t * 1796 iscsit_tpg_portal_lookup_locked(iscsit_tpg_t *tpg, 1797 struct sockaddr_storage *sa) 1798 { 1799 iscsit_portal_t tmp_portal; 1800 iscsit_portal_t *result; 1801 1802 /* Caller holds tpg->tpg_mutex */ 1803 bcopy(sa, &tmp_portal.portal_addr, sizeof (*sa)); 1804 if ((result = avl_find(&tpg->tpg_portal_list, &tmp_portal, NULL)) != 1805 NULL) { 1806 iscsit_portal_hold(result); 1807 } 1808 1809 return (result); 1810 } 1811 1812 iscsit_portal_t * 1813 iscsit_portal_create(iscsit_tpg_t *tpg, struct sockaddr_storage *sa) 1814 { 1815 iscsit_portal_t *portal; 1816 1817 portal = kmem_zalloc(sizeof (*portal), KM_SLEEP); 1818 /* 1819 * If (sa == NULL) then we are being asked to create the default 1820 * portal -- targets will use this portal when no portals are 1821 * explicitly configured. 1822 */ 1823 if (sa == NULL) { 1824 portal->portal_default = B_TRUE; 1825 } else { 1826 portal->portal_default = B_FALSE; 1827 bcopy(sa, &portal->portal_addr, sizeof (*sa)); 1828 } 1829 1830 idm_refcnt_init(&portal->portal_refcnt, portal); 1831 1832 /* 1833 * Add this portal to the list 1834 */ 1835 avl_add(&tpg->tpg_portal_list, portal); 1836 1837 return (portal); 1838 } 1839 1840 void 1841 iscsit_portal_delete(iscsit_portal_t *portal) 1842 { 1843 if (portal->portal_online > 0) { 1844 iscsit_portal_offline(portal); 1845 } 1846 1847 if (portal->portal_online == 0) { 1848 ASSERT(portal->portal_svc == NULL); 1849 idm_refcnt_destroy(&portal->portal_refcnt); 1850 kmem_free(portal, sizeof (*portal)); 1851 } 1852 } 1853 1854 void 1855 iscsit_portal_hold(iscsit_portal_t *portal) 1856 { 1857 idm_refcnt_hold(&portal->portal_refcnt); 1858 } 1859 1860 void 1861 iscsit_portal_rele(iscsit_portal_t *portal) 1862 { 1863 idm_refcnt_rele(&portal->portal_refcnt); 1864 } 1865 1866 int 1867 iscsit_portal_avl_compare(const void *void_portal1, const void *void_portal2) 1868 { 1869 const iscsit_portal_t *portal1 = void_portal1; 1870 const iscsit_portal_t *portal2 = void_portal2; 1871 const struct sockaddr_storage *ss1, *ss2; 1872 const struct in_addr *in1, *in2; 1873 const struct in6_addr *in61, *in62; 1874 int i; 1875 1876 /* 1877 * Compare ports, then address family, then ip address 1878 */ 1879 ss1 = &portal1->portal_addr; 1880 ss2 = &portal2->portal_addr; 1881 if (((struct sockaddr_in *)ss1)->sin_port != 1882 ((struct sockaddr_in *)ss2)->sin_port) { 1883 if (((struct sockaddr_in *)ss1)->sin_port > 1884 ((struct sockaddr_in *)ss2)->sin_port) 1885 return (1); 1886 else 1887 return (-1); 1888 } 1889 1890 /* 1891 * ports are the same 1892 */ 1893 if (ss1->ss_family != ss2->ss_family) { 1894 if (ss1->ss_family == AF_INET) 1895 return (1); 1896 else 1897 return (-1); 1898 } 1899 /* 1900 * address families are the same 1901 */ 1902 if (ss1->ss_family == AF_INET) { 1903 in1 = &((struct sockaddr_in *)ss1)->sin_addr; 1904 in2 = &((struct sockaddr_in *)ss2)->sin_addr; 1905 1906 if (in1->s_addr > in2->s_addr) 1907 return (1); 1908 else if (in1->s_addr < in2->s_addr) 1909 return (-1); 1910 else 1911 return (0); 1912 } else if (ss1->ss_family == AF_INET6) { 1913 in61 = &((struct sockaddr_in6 *)ss1)->sin6_addr; 1914 in62 = &((struct sockaddr_in6 *)ss2)->sin6_addr; 1915 1916 for (i = 0; i < 4; i++) { 1917 if (in61->s6_addr32[i] > in62->s6_addr32[i]) 1918 return (1); 1919 else if (in61->s6_addr32[i] < in62->s6_addr32[i]) 1920 return (-1); 1921 } 1922 return (0); 1923 } else 1924 cmn_err(CE_WARN, 1925 "iscsit_portal_avl_compare: unknown ss_family %d", 1926 ss1->ss_family); 1927 1928 return (1); 1929 } 1930 1931 1932 idm_status_t 1933 iscsit_portal_online(iscsit_portal_t *portal) 1934 { 1935 idm_status_t rc = 0; 1936 idm_svc_t *svc; 1937 idm_svc_req_t sr; 1938 uint16_t port; 1939 struct sockaddr_in *sin; 1940 1941 /* Caller holds parent TPG mutex */ 1942 if (portal->portal_online == 0) { 1943 /* 1944 * If there is no existing IDM service instance for this port, 1945 * create one. If the service exists, then the lookup, 1946 * creates a reference on the existing service. 1947 */ 1948 sin = (struct sockaddr_in *)&portal->portal_addr; 1949 port = ntohs(sin->sin_port); 1950 if (port == 0) 1951 port = ISCSI_LISTEN_PORT; 1952 ASSERT(portal->portal_svc == NULL); 1953 if ((svc = idm_tgt_svc_lookup(port)) == NULL) { 1954 sr.sr_port = port; 1955 sr.sr_li = iscsit_global.global_li; 1956 sr.sr_conn_ops.icb_rx_scsi_cmd = &iscsit_op_scsi_cmd; 1957 sr.sr_conn_ops.icb_rx_scsi_rsp = NULL; 1958 sr.sr_conn_ops.icb_rx_misc = &iscsit_rx_pdu; 1959 sr.sr_conn_ops.icb_rx_error = &iscsit_rx_pdu_error; 1960 sr.sr_conn_ops.icb_task_aborted = &iscsit_task_aborted; 1961 sr.sr_conn_ops.icb_client_notify = 1962 &iscsit_client_notify; 1963 sr.sr_conn_ops.icb_build_hdr = &iscsit_build_hdr; 1964 sr.sr_conn_ops.icb_update_statsn = 1965 &iscsit_update_statsn; 1966 sr.sr_conn_ops.icb_keepalive = &iscsit_keepalive; 1967 1968 if (idm_tgt_svc_create(&sr, &svc) != 1969 IDM_STATUS_SUCCESS) { 1970 return (IDM_STATUS_FAIL); 1971 } 1972 1973 /* Get reference on the service we just created */ 1974 idm_tgt_svc_hold(svc); 1975 } 1976 if ((rc = idm_tgt_svc_online(svc)) != IDM_STATUS_SUCCESS) { 1977 idm_tgt_svc_rele_and_destroy(svc); 1978 return (IDM_STATUS_FAIL); 1979 } 1980 portal->portal_svc = svc; 1981 1982 /* 1983 * Only call iSNS for first online 1984 */ 1985 iscsit_isns_portal_online(portal); 1986 } 1987 1988 portal->portal_online++; 1989 1990 return (rc); 1991 } 1992 1993 void 1994 iscsit_portal_offline(iscsit_portal_t *portal) 1995 { 1996 portal->portal_online--; 1997 1998 if (portal->portal_online == 0) { 1999 /* 2000 * Only call iSNS for last offline 2001 */ 2002 iscsit_isns_portal_offline(portal); 2003 idm_tgt_svc_offline(portal->portal_svc); 2004 /* If service is unreferenced, destroy it too */ 2005 idm_tgt_svc_rele_and_destroy(portal->portal_svc); 2006 portal->portal_svc = NULL; 2007 } 2008 2009 } 2010 2011 it_cfg_status_t 2012 iscsit_config_merge_ini(it_config_t *cfg) 2013 { 2014 iscsit_ini_t *ini, *next_ini; 2015 it_ini_t *cfg_ini; 2016 2017 /* 2018 * Initiator objects are so simple we will just destroy all the current 2019 * objects and build new ones. Nothing should ever reference an 2020 * initator object.. instead just lookup the initiator object and 2021 * grab the properties while holding the global config lock. 2022 */ 2023 for (ini = avl_first(&iscsit_global.global_ini_list); 2024 ini != NULL; 2025 ini = next_ini) { 2026 next_ini = AVL_NEXT(&iscsit_global.global_ini_list, ini); 2027 avl_remove(&iscsit_global.global_ini_list, ini); 2028 nvlist_free(ini->ini_props); 2029 kmem_free(ini, sizeof (*ini)); 2030 iscsit_global_rele(); 2031 } 2032 2033 for (cfg_ini = cfg->config_ini_list; 2034 cfg_ini != NULL; 2035 cfg_ini = cfg_ini->ini_next) { 2036 ini = kmem_zalloc(sizeof (iscsit_ini_t), KM_SLEEP); 2037 (void) strlcpy(ini->ini_name, cfg_ini->ini_name, 2038 MAX_ISCSI_NODENAMELEN); 2039 (void) nvlist_dup(cfg_ini->ini_properties, &ini->ini_props, 2040 KM_SLEEP); 2041 avl_add(&iscsit_global.global_ini_list, ini); 2042 iscsit_global_hold(); 2043 } 2044 2045 return (ITCFG_SUCCESS); 2046 } 2047 2048 int 2049 iscsit_ini_avl_compare(const void *void_ini1, const void *void_ini2) 2050 { 2051 const iscsit_ini_t *ini1 = void_ini1; 2052 const iscsit_ini_t *ini2 = void_ini2; 2053 int result; 2054 2055 /* 2056 * Sort by ISID first then TSIH 2057 */ 2058 result = strcmp(ini1->ini_name, ini2->ini_name); 2059 if (result < 0) { 2060 return (-1); 2061 } else if (result > 0) { 2062 return (1); 2063 } 2064 2065 return (0); 2066 } 2067 2068 iscsit_ini_t * 2069 iscsit_ini_lookup_locked(char *ini_name) 2070 { 2071 iscsit_ini_t tmp_ini; 2072 iscsit_ini_t *result; 2073 2074 /* 2075 * Use a dummy target for lookup, filling in all fields used in AVL 2076 * comparison. 2077 */ 2078 (void) strlcpy(tmp_ini.ini_name, ini_name, MAX_ISCSI_NODENAMELEN); 2079 result = avl_find(&iscsit_global.global_ini_list, &tmp_ini, NULL); 2080 2081 return (result); 2082 } 2083
Indexes created Wed Feb 10 04:24:43 UTC 2010
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