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 * iSCSI connection interfaces 26 */ 27 28 #define ISCSI_ICS_NAMES 29 #include "iscsi.h" 30 #include "persistent.h" 31 #include <sys/bootprops.h> 32 33 extern ib_boot_prop_t *iscsiboot_prop; 34 35 static void iscsi_client_notify_task(void *cn_task_void); 36 37 static void iscsi_conn_flush_active_cmds(iscsi_conn_t *icp); 38 39 #define SHUTDOWN_TIMEOUT 180 /* seconds */ 40 41 extern int modrootloaded; 42 43 boolean_t iscsi_conn_logging = B_FALSE; 44 45 /* 46 * +--------------------------------------------------------------------+ 47 * | External Connection Interfaces | 48 * +--------------------------------------------------------------------+ 49 */ 50 51 /* 52 * iscsi_conn_create - This creates an iscsi connection structure and 53 * associates it with a session structure. The session's sess_conn_list_rwlock 54 * should be held as a writer before calling this function. 55 */ 56 iscsi_status_t 57 iscsi_conn_create(struct sockaddr *addr, iscsi_sess_t *isp, iscsi_conn_t **icpp) 58 { 59 iscsi_conn_t *icp = NULL; 60 char th_name[ISCSI_TH_MAX_NAME_LEN]; 61 62 /* See if this connection already exists */ 63 for (icp = isp->sess_conn_list; icp; icp = icp->conn_next) { 64 65 /* 66 * Compare the ioctl information to see if 67 * its a match for this connection. (This 68 * is done by making sure the IPs are of 69 * the same size and then they are the 70 * same value. 71 */ 72 if (bcmp(&icp->conn_base_addr, addr, 73 SIZEOF_SOCKADDR(addr)) == 0) { 74 /* It's a match, record this connection */ 75 break; 76 } 77 } 78 79 /* If icp is found return it */ 80 if (icp != NULL) { 81 *icpp = icp; 82 return (ISCSI_STATUS_SUCCESS); 83 } 84 85 /* We are creating the connection, allocate, and setup */ 86 icp = (iscsi_conn_t *)kmem_zalloc(sizeof (iscsi_conn_t), KM_SLEEP); 87 88 /* 89 * Setup connection 90 */ 91 icp->conn_sig = ISCSI_SIG_CONN; 92 icp->conn_state = ISCSI_CONN_STATE_FREE; 93 mutex_init(&icp->conn_state_mutex, NULL, MUTEX_DRIVER, NULL); 94 cv_init(&icp->conn_state_change, NULL, CV_DRIVER, NULL); 95 mutex_init(&icp->conn_login_mutex, NULL, MUTEX_DRIVER, NULL); 96 cv_init(&icp->conn_login_cv, NULL, CV_DRIVER, NULL); 97 icp->conn_state_destroy = B_FALSE; 98 idm_sm_audit_init(&icp->conn_state_audit); 99 icp->conn_sess = isp; 100 101 mutex_enter(&iscsi_oid_mutex); 102 icp->conn_oid = iscsi_oid++; 103 mutex_exit(&iscsi_oid_mutex); 104 105 /* 106 * IDM CN taskq 107 */ 108 109 if (snprintf(th_name, sizeof (th_name) - 1, 110 ISCSI_CONN_CN_TASKQ_NAME_FORMAT, 111 icp->conn_sess->sess_hba->hba_oid, icp->conn_sess->sess_oid, 112 icp->conn_oid) >= sizeof (th_name)) { 113 cv_destroy(&icp->conn_state_change); 114 mutex_destroy(&icp->conn_state_mutex); 115 kmem_free(icp, sizeof (iscsi_conn_t)); 116 *icpp = NULL; 117 return (ISCSI_STATUS_INTERNAL_ERROR); 118 } 119 120 icp->conn_cn_taskq = 121 ddi_taskq_create(icp->conn_sess->sess_hba->hba_dip, th_name, 1, 122 TASKQ_DEFAULTPRI, 0); 123 if (icp->conn_cn_taskq == NULL) { 124 cv_destroy(&icp->conn_state_change); 125 mutex_destroy(&icp->conn_state_mutex); 126 kmem_free(icp, sizeof (iscsi_conn_t)); 127 *icpp = NULL; 128 return (ISCSI_STATUS_INTERNAL_ERROR); 129 } 130 131 /* Creation of the transfer thread */ 132 if (snprintf(th_name, sizeof (th_name) - 1, ISCSI_CONN_TXTH_NAME_FORMAT, 133 icp->conn_sess->sess_hba->hba_oid, icp->conn_sess->sess_oid, 134 icp->conn_oid) >= sizeof (th_name)) { 135 cv_destroy(&icp->conn_state_change); 136 mutex_destroy(&icp->conn_state_mutex); 137 kmem_free(icp, sizeof (iscsi_conn_t)); 138 ddi_taskq_destroy(icp->conn_cn_taskq); 139 *icpp = NULL; 140 return (ISCSI_STATUS_INTERNAL_ERROR); 141 } 142 143 icp->conn_tx_thread = iscsi_thread_create(isp->sess_hba->hba_dip, 144 th_name, iscsi_tx_thread, icp); 145 146 /* setup connection queues */ 147 iscsi_init_queue(&icp->conn_queue_active); 148 iscsi_init_queue(&icp->conn_queue_idm_aborting); 149 150 bcopy(addr, &icp->conn_base_addr, sizeof (icp->conn_base_addr)); 151 152 /* Add new connection to the session connection list */ 153 icp->conn_cid = isp->sess_conn_next_cid++; 154 if (isp->sess_conn_list == NULL) { 155 isp->sess_conn_list = isp->sess_conn_list_last_ptr = icp; 156 } else { 157 isp->sess_conn_list_last_ptr->conn_next = icp; 158 isp->sess_conn_list_last_ptr = icp; 159 } 160 161 KSTAT_INC_SESS_CNTR_CONN(isp); 162 (void) iscsi_conn_kstat_init(icp); 163 164 *icpp = icp; 165 166 return (ISCSI_STATUS_SUCCESS); 167 } 168 169 /* 170 * iscsi_conn_online - This attempts to take a connection from 171 * ISCSI_CONN_STATE_FREE to ISCSI_CONN_STATE_LOGGED_IN. 172 */ 173 iscsi_status_t 174 iscsi_conn_online(iscsi_conn_t *icp) 175 { 176 iscsi_task_t *itp; 177 iscsi_status_t rval; 178 179 ASSERT(icp != NULL); 180 ASSERT(mutex_owned(&icp->conn_state_mutex)); 181 ASSERT(icp->conn_state == ISCSI_CONN_STATE_FREE); 182 183 /* 184 * If we are attempting to connect then for the purposes of the 185 * other initiator code we are effectively in ISCSI_CONN_STATE_IN_LOGIN. 186 */ 187 iscsi_conn_update_state_locked(icp, ISCSI_CONN_STATE_IN_LOGIN); 188 mutex_exit(&icp->conn_state_mutex); 189 190 /* 191 * Sync base connection information before login 192 * A login redirection might have shifted the 193 * current information from the base. 194 */ 195 bcopy(&icp->conn_base_addr, &icp->conn_curr_addr, 196 sizeof (icp->conn_curr_addr)); 197 198 itp = kmem_zalloc(sizeof (iscsi_task_t), KM_SLEEP); 199 ASSERT(itp != NULL); 200 201 itp->t_arg = icp; 202 itp->t_blocking = B_TRUE; 203 rval = iscsi_login_start(itp); 204 kmem_free(itp, sizeof (iscsi_task_t)); 205 206 mutex_enter(&icp->conn_state_mutex); 207 208 return (rval); 209 } 210 211 /* 212 * iscsi_conn_offline - This attempts to take a connection from 213 * any state to ISCSI_CONN_STATE_FREE. 214 */ 215 iscsi_status_t 216 iscsi_conn_offline(iscsi_conn_t *icp) 217 { 218 clock_t delay; 219 220 ASSERT(icp != NULL); 221 222 /* 223 * We can only destroy a connection if its either in 224 * a state of FREE or LOGGED. The other states are 225 * transitionary and its unsafe to perform actions 226 * on the connection in those states. Set a flag 227 * on the connection to influence the transitions 228 * to quickly complete. Then wait for a state 229 * transition. 230 * 231 * ISCSI_CONN_STATE_LOGGED_IN is set immediately at the 232 * start of CN_NOTIFY_FFP processing. icp->conn_state_ffp 233 * is set to true at the end of ffp processing, at which 234 * point any session updates are complete. We don't 235 * want to start offlining the connection before we're 236 * done completing the FFP processing since this might 237 * interrupt the discovery process. 238 */ 239 delay = ddi_get_lbolt() + SEC_TO_TICK(SHUTDOWN_TIMEOUT); 240 mutex_enter(&icp->conn_state_mutex); 241 icp->conn_state_destroy = B_TRUE; 242 while ((((icp->conn_state != ISCSI_CONN_STATE_FREE) && 243 (icp->conn_state != ISCSI_CONN_STATE_LOGGED_IN)) || 244 ((icp->conn_state == ISCSI_CONN_STATE_LOGGED_IN) && 245 !icp->conn_state_ffp)) && 246 (ddi_get_lbolt() < delay)) { 247 /* wait for transition */ 248 (void) cv_timedwait(&icp->conn_state_change, 249 &icp->conn_state_mutex, delay); 250 } 251 252 switch (icp->conn_state) { 253 case ISCSI_CONN_STATE_FREE: 254 break; 255 case ISCSI_CONN_STATE_LOGGED_IN: 256 if (icp->conn_state_ffp) 257 (void) iscsi_handle_logout(icp); 258 else { 259 icp->conn_state_destroy = B_FALSE; 260 mutex_exit(&icp->conn_state_mutex); 261 return (ISCSI_STATUS_INTERNAL_ERROR); 262 } 263 break; 264 case ISCSI_CONN_STATE_IN_LOGIN: 265 case ISCSI_CONN_STATE_IN_LOGOUT: 266 case ISCSI_CONN_STATE_FAILED: 267 case ISCSI_CONN_STATE_POLLING: 268 default: 269 icp->conn_state_destroy = B_FALSE; 270 mutex_exit(&icp->conn_state_mutex); 271 return (ISCSI_STATUS_INTERNAL_ERROR); 272 } 273 mutex_exit(&icp->conn_state_mutex); 274 275 return (ISCSI_STATUS_SUCCESS); 276 } 277 278 /* 279 * iscsi_conn_destroy - This destroys an iscsi connection structure 280 * and de-associates it with the session. The connection should 281 * already been in the ISCSI_CONN_STATE_FREE when attempting this 282 * operation. 283 */ 284 iscsi_status_t 285 iscsi_conn_destroy(iscsi_conn_t *icp) 286 { 287 iscsi_sess_t *isp; 288 iscsi_conn_t *t_icp; 289 290 ASSERT(icp != NULL); 291 isp = icp->conn_sess; 292 ASSERT(isp != NULL); 293 294 if (icp->conn_state != ISCSI_CONN_STATE_FREE) { 295 return (ISCSI_STATUS_INTERNAL_ERROR); 296 } 297 298 /* Destroy transfer thread */ 299 iscsi_thread_destroy(icp->conn_tx_thread); 300 ddi_taskq_destroy(icp->conn_cn_taskq); 301 302 /* Terminate connection queues */ 303 iscsi_destroy_queue(&icp->conn_queue_idm_aborting); 304 iscsi_destroy_queue(&icp->conn_queue_active); 305 306 cv_destroy(&icp->conn_login_cv); 307 mutex_destroy(&icp->conn_login_mutex); 308 cv_destroy(&icp->conn_state_change); 309 mutex_destroy(&icp->conn_state_mutex); 310 311 /* 312 * Remove connection from sessions linked list. 313 */ 314 if (isp->sess_conn_list == icp) { 315 /* connection first item in list */ 316 isp->sess_conn_list = icp->conn_next; 317 /* 318 * check if this is also the last item in the list 319 */ 320 if (isp->sess_conn_list_last_ptr == icp) { 321 isp->sess_conn_list_last_ptr = NULL; 322 } 323 } else { 324 /* 325 * search session list for icp pointing 326 * to connection being removed. Then 327 * update that connections next pointer. 328 */ 329 t_icp = isp->sess_conn_list; 330 while (t_icp->conn_next != NULL) { 331 if (t_icp->conn_next == icp) { 332 break; 333 } 334 t_icp = t_icp->conn_next; 335 } 336 if (t_icp->conn_next == icp) { 337 t_icp->conn_next = icp->conn_next; 338 /* 339 * if this is the last connection in the list 340 * update the last_ptr to point to t_icp 341 */ 342 if (isp->sess_conn_list_last_ptr == icp) { 343 isp->sess_conn_list_last_ptr = t_icp; 344 } 345 } else { 346 /* couldn't find session */ 347 ASSERT(FALSE); 348 } 349 } 350 351 /* Free this Connections Data */ 352 iscsi_conn_kstat_term(icp); 353 kmem_free(icp, sizeof (iscsi_conn_t)); 354 355 return (ISCSI_STATUS_SUCCESS); 356 } 357 358 359 /* 360 * iscsi_conn_set_login_min_max - set min/max login window 361 * 362 * Used to set the min and max login window. Input values 363 * are in seconds. 364 */ 365 void 366 iscsi_conn_set_login_min_max(iscsi_conn_t *icp, int min, int max) 367 { 368 ASSERT(icp != NULL); 369 370 icp->conn_login_min = ddi_get_lbolt() + SEC_TO_TICK(min); 371 icp->conn_login_max = ddi_get_lbolt() + SEC_TO_TICK(max); 372 } 373 374 375 /* 376 * Process the idm notifications 377 */ 378 idm_status_t 379 iscsi_client_notify(idm_conn_t *ic, idm_client_notify_t icn, uintptr_t data) 380 { 381 iscsi_cn_task_t *cn; 382 iscsi_conn_t *icp = ic->ic_handle; 383 iscsi_sess_t *isp; 384 385 /* 386 * Don't access icp if the notification is CN_CONNECT_DESTROY 387 * since icp may have already been freed. 388 * 389 * In particular, we cannot audit the CN_CONNECT_DESTROY event. 390 * 391 * Handle a few cases immediately, the rest in a task queue. 392 */ 393 switch (icn) { 394 case CN_CONNECT_FAIL: 395 case CN_LOGIN_FAIL: 396 /* 397 * Wakeup any thread waiting for login stuff to happen. 398 */ 399 ASSERT(icp != NULL); 400 401 mutex_enter(&icp->conn_state_mutex); 402 idm_sm_audit_event(&icp->conn_state_audit, 403 SAS_ISCSI_CONN, icp->conn_state, icn, data); 404 mutex_exit(&icp->conn_state_mutex); 405 iscsi_login_update_state(icp, LOGIN_ERROR); 406 return (IDM_STATUS_SUCCESS); 407 408 case CN_READY_FOR_LOGIN: 409 idm_conn_hold(ic); /* Released in CN_CONNECT_LOST */ 410 ASSERT(icp != NULL); 411 412 mutex_enter(&icp->conn_state_mutex); 413 idm_sm_audit_event(&icp->conn_state_audit, 414 SAS_ISCSI_CONN, icp->conn_state, icn, data); 415 icp->conn_state_idm_connected = B_TRUE; 416 cv_broadcast(&icp->conn_state_change); 417 mutex_exit(&icp->conn_state_mutex); 418 419 iscsi_login_update_state(icp, LOGIN_READY); 420 return (IDM_STATUS_SUCCESS); 421 422 case CN_CONNECT_DESTROY: 423 /* 424 * We released any dependecies we had on this object in 425 * either CN_LOGIN_FAIL or CN_CONNECT_LOST so we just need 426 * to destroy the IDM connection now. 427 */ 428 idm_ini_conn_destroy(ic); 429 return (IDM_STATUS_SUCCESS); 430 } 431 432 ASSERT(icp != NULL); 433 mutex_enter(&icp->conn_state_mutex); 434 idm_sm_audit_event(&icp->conn_state_audit, 435 SAS_ISCSI_CONN, icp->conn_state, icn, data); 436 mutex_exit(&icp->conn_state_mutex); 437 isp = icp->conn_sess; 438 439 /* 440 * Dispatch notifications to the taskq since they often require 441 * long blocking operations. In the case of CN_CONNECT_DESTROY 442 * we actually just want to destroy the connection which we 443 * can't do in the IDM taskq context. 444 */ 445 cn = kmem_alloc(sizeof (*cn), KM_SLEEP); 446 447 cn->ct_ic = ic; 448 cn->ct_icn = icn; 449 cn->ct_data = data; 450 451 idm_conn_hold(ic); 452 453 if (ddi_taskq_dispatch(icp->conn_cn_taskq, 454 iscsi_client_notify_task, cn, DDI_SLEEP) != DDI_SUCCESS) { 455 idm_conn_rele(ic); 456 cmn_err(CE_WARN, "iscsi connection(%u) failure - " 457 "unable to schedule notify task", icp->conn_oid); 458 iscsi_conn_update_state(icp, ISCSI_CONN_STATE_FREE); 459 mutex_enter(&isp->sess_state_mutex); 460 iscsi_sess_state_machine(isp, 461 ISCSI_SESS_EVENT_N6); 462 mutex_exit(&isp->sess_state_mutex); 463 } 464 465 return (IDM_STATUS_SUCCESS); 466 } 467 468 static void 469 iscsi_client_notify_task(void *cn_task_void) 470 { 471 iscsi_cn_task_t *cn_task = cn_task_void; 472 iscsi_conn_t *icp; 473 iscsi_sess_t *isp; 474 idm_conn_t *ic; 475 idm_client_notify_t icn; 476 uintptr_t data; 477 idm_ffp_disable_t disable_type; 478 boolean_t in_login; 479 480 ic = cn_task->ct_ic; 481 icn = cn_task->ct_icn; 482 data = cn_task->ct_data; 483 484 icp = ic->ic_handle; 485 ASSERT(icp != NULL); 486 isp = icp->conn_sess; 487 488 switch (icn) { 489 case CN_FFP_ENABLED: 490 mutex_enter(&icp->conn_state_mutex); 491 icp->conn_async_logout = B_FALSE; 492 icp->conn_state_ffp = B_TRUE; 493 cv_broadcast(&icp->conn_state_change); 494 mutex_exit(&icp->conn_state_mutex); 495 496 /* 497 * This logic assumes that the IDM login-snooping code 498 * and the initiator login code will agree to go when 499 * the connection is in FFP or final error received. 500 * The reason we do this is that we don't want to process 501 * CN_FFP_DISABLED until CN_FFP_ENABLED has been full handled. 502 */ 503 mutex_enter(&icp->conn_login_mutex); 504 while ((icp->conn_login_state != LOGIN_FFP) && 505 (icp->conn_login_state != LOGIN_ERROR)) { 506 cv_wait(&icp->conn_login_cv, &icp->conn_login_mutex); 507 } 508 mutex_exit(&icp->conn_login_mutex); 509 break; 510 case CN_FFP_DISABLED: 511 disable_type = (idm_ffp_disable_t)data; 512 513 mutex_enter(&icp->conn_state_mutex); 514 switch (disable_type) { 515 case FD_SESS_LOGOUT: 516 case FD_CONN_LOGOUT: 517 if (icp->conn_async_logout) { 518 /* 519 * Our logout was in response to an 520 * async logout request so treat this 521 * like a connection failure (we will 522 * try to re-establish the connection) 523 */ 524 iscsi_conn_update_state_locked(icp, 525 ISCSI_CONN_STATE_FAILED); 526 } else { 527 /* 528 * Logout due to to user config change, 529 * we will not try to re-establish 530 * the connection. 531 */ 532 iscsi_conn_update_state_locked(icp, 533 ISCSI_CONN_STATE_IN_LOGOUT); 534 /* 535 * Hold off generating the ISCSI_SESS_EVENT_N3 536 * event until we get the CN_CONNECT_LOST 537 * notification. This matches the pre-IDM 538 * implementation better. 539 */ 540 } 541 break; 542 543 case FD_CONN_FAIL: 544 default: 545 if (icp->conn_state == ISCSI_CONN_STATE_IN_LOGIN) { 546 iscsi_conn_update_state_locked(icp, 547 ISCSI_CONN_STATE_FREE); 548 } else { 549 iscsi_conn_update_state_locked(icp, 550 ISCSI_CONN_STATE_FAILED); 551 } 552 break; 553 } 554 555 icp->conn_state_ffp = B_FALSE; 556 cv_broadcast(&icp->conn_state_change); 557 mutex_exit(&icp->conn_state_mutex); 558 559 break; 560 case CN_CONNECT_LOST: 561 /* 562 * We only care about CN_CONNECT_LOST if we've logged in. IDM 563 * sends a flag as the data payload to indicate whether we 564 * were trying to login. The CN_LOGIN_FAIL notification 565 * gives us what we need to know for login failures and 566 * otherwise we will need to keep a bunch of state to know 567 * what CN_CONNECT_LOST means to us. 568 */ 569 in_login = (boolean_t)data; 570 if (in_login || 571 (icp->conn_prev_state == ISCSI_CONN_STATE_IN_LOGIN)) { 572 mutex_enter(&icp->conn_state_mutex); 573 574 icp->conn_state_idm_connected = B_FALSE; 575 cv_broadcast(&icp->conn_state_change); 576 mutex_exit(&icp->conn_state_mutex); 577 578 /* Release connect hold from CN_READY_FOR_LOGIN */ 579 idm_conn_rele(ic); 580 break; 581 } 582 583 /* Any remaining commands are never going to finish */ 584 iscsi_conn_flush_active_cmds(icp); 585 586 /* 587 * The connection is no longer active so cleanup any 588 * references to the connection and release any holds so 589 * that IDM can finish cleanup. 590 */ 591 mutex_enter(&icp->conn_state_mutex); 592 if (icp->conn_state != ISCSI_CONN_STATE_FAILED) { 593 594 mutex_enter(&isp->sess_state_mutex); 595 iscsi_sess_state_machine(isp, ISCSI_SESS_EVENT_N3); 596 mutex_exit(&isp->sess_state_mutex); 597 598 iscsi_conn_update_state_locked(icp, 599 ISCSI_CONN_STATE_FREE); 600 } else { 601 602 mutex_enter(&isp->sess_state_mutex); 603 iscsi_sess_state_machine(isp, 604 ISCSI_SESS_EVENT_N5); 605 mutex_exit(&isp->sess_state_mutex); 606 607 /* 608 * If session type is NORMAL, try to reestablish the 609 * connection. 610 */ 611 if (isp->sess_type == ISCSI_SESS_TYPE_NORMAL) { 612 iscsi_conn_retry(isp, icp); 613 } else { 614 615 mutex_enter(&isp->sess_state_mutex); 616 iscsi_sess_state_machine(isp, 617 ISCSI_SESS_EVENT_N6); 618 mutex_exit(&isp->sess_state_mutex); 619 620 iscsi_conn_update_state_locked(icp, 621 ISCSI_CONN_STATE_FREE); 622 } 623 } 624 625 (void) iscsi_thread_stop(icp->conn_tx_thread); 626 627 icp->conn_state_idm_connected = B_FALSE; 628 cv_broadcast(&icp->conn_state_change); 629 mutex_exit(&icp->conn_state_mutex); 630 631 /* Release connect hold from CN_READY_FOR_LOGIN */ 632 idm_conn_rele(ic); 633 break; 634 default: 635 ISCSI_CONN_LOG(CE_WARN, 636 "iscsi_client_notify: unknown notification: " 637 "%x: NOT IMPLEMENTED YET: icp: %p ic: %p ", 638 icn, (void *)icp, (void *)ic); 639 break; 640 } 641 /* free the task notify structure we allocated in iscsi_client_notify */ 642 kmem_free(cn_task, sizeof (*cn_task)); 643 644 /* Release the hold we acquired in iscsi_client_notify */ 645 idm_conn_rele(ic); 646 } 647 648 /* 649 * iscsi_conn_sync_params - used to update connection parameters 650 * 651 * Used to update connection parameters with current configured 652 * parameters in the persistent store. This should be called 653 * before starting to make a new iscsi connection in iscsi_login. 654 */ 655 iscsi_status_t 656 iscsi_conn_sync_params(iscsi_conn_t *icp) 657 { 658 iscsi_sess_t *isp; 659 iscsi_hba_t *ihp; 660 int param_id; 661 persistent_param_t pp; 662 persistent_tunable_param_t ptp; 663 iscsi_config_sess_t *ics; 664 int idx, size; 665 char *name; 666 667 ASSERT(icp != NULL); 668 ASSERT((icp->conn_state == ISCSI_CONN_STATE_IN_LOGIN) || 669 (icp->conn_state == ISCSI_CONN_STATE_FAILED) || 670 (icp->conn_state == ISCSI_CONN_STATE_POLLING)); 671 isp = icp->conn_sess; 672 ASSERT(isp != NULL); 673 ihp = isp->sess_hba; 674 ASSERT(ihp != NULL); 675 676 /* 677 * Check if someone is trying to destroy this 678 * connection. If so fail the sync request, 679 * as a method of fast fail. 680 */ 681 if (icp->conn_state_destroy == B_TRUE) { 682 return (ISCSI_STATUS_SHUTDOWN); 683 } 684 685 bzero(&pp, sizeof (pp)); 686 687 /* First get a copy of the HBA params */ 688 bcopy(&ihp->hba_params, &icp->conn_params, 689 sizeof (iscsi_login_params_t)); 690 bcopy(&ihp->hba_tunable_params, &icp->conn_tunable_params, 691 sizeof (iscsi_tunable_params_t)); 692 693 /* 694 * Now we need to get the session configured 695 * values from the persistent store and apply 696 * them to our connection. 697 */ 698 (void) persistent_param_get((char *)isp->sess_name, &pp); 699 for (param_id = 0; param_id < ISCSI_NUM_LOGIN_PARAM; 700 param_id++) { 701 if (iscsiboot_prop && modrootloaded && 702 !iscsi_chk_bootlun_mpxio(ihp) && isp->sess_boot) { 703 /* 704 * iscsi boot with mpxio disabled 705 * while iscsi booting target's parameter overriden 706 * do no update target's parameters. 707 */ 708 if (pp.p_bitmap) { 709 cmn_err(CE_NOTE, "Adopting " 710 " default login parameters in" 711 " boot session as MPxIO is disabled"); 712 } 713 break; 714 } 715 if (pp.p_bitmap & (1 << param_id)) { 716 717 switch (param_id) { 718 /* 719 * Boolean parameters 720 */ 721 case ISCSI_LOGIN_PARAM_DATA_SEQUENCE_IN_ORDER: 722 icp->conn_params.data_pdu_in_order = 723 pp.p_params.data_pdu_in_order; 724 break; 725 case ISCSI_LOGIN_PARAM_IMMEDIATE_DATA: 726 icp->conn_params.immediate_data = 727 pp.p_params.immediate_data; 728 break; 729 case ISCSI_LOGIN_PARAM_INITIAL_R2T: 730 icp->conn_params.initial_r2t = 731 pp.p_params.initial_r2t; 732 break; 733 case ISCSI_LOGIN_PARAM_DATA_PDU_IN_ORDER: 734 icp->conn_params.data_pdu_in_order = 735 pp.p_params.data_pdu_in_order; 736 break; 737 /* 738 * Integer parameters 739 */ 740 case ISCSI_LOGIN_PARAM_HEADER_DIGEST: 741 icp->conn_params.header_digest = 742 pp.p_params.header_digest; 743 break; 744 case ISCSI_LOGIN_PARAM_DATA_DIGEST: 745 icp->conn_params.data_digest = 746 pp.p_params.data_digest; 747 break; 748 case ISCSI_LOGIN_PARAM_DEFAULT_TIME_2_RETAIN: 749 icp->conn_params.default_time_to_retain = 750 pp.p_params.default_time_to_retain; 751 break; 752 case ISCSI_LOGIN_PARAM_DEFAULT_TIME_2_WAIT: 753 icp->conn_params.default_time_to_wait = 754 pp.p_params.default_time_to_wait; 755 break; 756 case ISCSI_LOGIN_PARAM_MAX_RECV_DATA_SEGMENT_LENGTH: 757 icp->conn_params.max_recv_data_seg_len = 758 pp.p_params.max_recv_data_seg_len; 759 break; 760 case ISCSI_LOGIN_PARAM_FIRST_BURST_LENGTH: 761 icp->conn_params.first_burst_length = 762 pp.p_params.first_burst_length; 763 break; 764 case ISCSI_LOGIN_PARAM_MAX_BURST_LENGTH: 765 icp->conn_params.max_burst_length = 766 pp.p_params.max_burst_length; 767 break; 768 769 /* 770 * Integer parameters which currently are unsettable 771 */ 772 case ISCSI_LOGIN_PARAM_MAX_CONNECTIONS: 773 /* FALLTHRU */ 774 case ISCSI_LOGIN_PARAM_OUTSTANDING_R2T: 775 /* FALLTHRU */ 776 case ISCSI_LOGIN_PARAM_ERROR_RECOVERY_LEVEL: 777 /* FALLTHRU */ 778 default: 779 break; 780 } 781 } 782 } 783 784 if (persistent_get_tunable_param((char *)isp->sess_name, &ptp) == 785 B_TRUE) { 786 if (ptp.p_bitmap & ISCSI_TUNABLE_PARAM_RX_TIMEOUT_VALUE) { 787 icp->conn_tunable_params.recv_login_rsp_timeout = 788 ptp.p_params.recv_login_rsp_timeout; 789 } 790 if (ptp.p_bitmap & ISCSI_TUNABLE_PARAM_CONN_LOGIN_MAX) { 791 icp->conn_tunable_params.conn_login_max = 792 ptp.p_params.conn_login_max; 793 } 794 if (ptp.p_bitmap & ISCSI_TUNABLE_PARAM_LOGIN_POLLING_DELAY) { 795 icp->conn_tunable_params.polling_login_delay = 796 ptp.p_params.polling_login_delay; 797 } 798 } 799 800 /* Skip binding checks on discovery sessions */ 801 if (isp->sess_type == ISCSI_SESS_TYPE_DISCOVERY) { 802 return (ISCSI_STATUS_SUCCESS); 803 } 804 805 /* 806 * Now we need to get the current optional connection 807 * binding information. 808 */ 809 /* setup initial buffer for configured session information */ 810 size = sizeof (*ics); 811 ics = kmem_zalloc(size, KM_SLEEP); 812 ics->ics_in = 1; 813 814 /* get configured sessions information */ 815 name = (char *)isp->sess_name; 816 if (persistent_get_config_session(name, ics) == B_FALSE) { 817 /* 818 * If we were unable to get target level information 819 * then check the initiator level information. 820 */ 821 name = (char *)isp->sess_hba->hba_name; 822 if (persistent_get_config_session(name, ics) == B_FALSE) { 823 /* 824 * No hba information is found. So assume default 825 * one session unbound behavior. 826 */ 827 ics->ics_out = 1; 828 ics->ics_bound = B_FALSE; 829 } 830 } 831 832 if (iscsiboot_prop && (ics->ics_out > 1) && isp->sess_boot && 833 !iscsi_chk_bootlun_mpxio(ihp)) { 834 /* 835 * iscsi booting session with mpxio disabled, 836 * no need set multiple sessions for booting session 837 */ 838 ics->ics_out = 1; 839 ics->ics_bound = B_FALSE; 840 cmn_err(CE_NOTE, "MPxIO is disabled," 841 " no need to configure multiple boot sessions"); 842 } 843 844 /* 845 * Check to make sure this session is still a configured 846 * session. The user might have decreased the session 847 * count. (NOTE: byte 5 of the sess_isid is the session 848 * count (via MS/T). This counter starts at 0.) 849 */ 850 851 852 idx = isp->sess_isid[5]; 853 854 if (iscsiboot_prop && (idx == ISCSI_MAX_CONFIG_SESSIONS)) { 855 /* 856 * This is temporary session for boot session propose 857 * no need to bound IP for this session 858 */ 859 icp->conn_bound = B_FALSE; 860 kmem_free(ics, sizeof (iscsi_config_sess_t)); 861 return (ISCSI_STATUS_SUCCESS); 862 } 863 864 if (ics->ics_out <= idx) { 865 /* 866 * No longer a configured session. Return a 867 * failure so we don't attempt to relogin. 868 */ 869 return (ISCSI_STATUS_SHUTDOWN); 870 } 871 872 /* 873 * If sessions are unbound set this information on 874 * the connection and return success. 875 */ 876 if (ics->ics_bound == B_FALSE) { 877 icp->conn_bound = B_FALSE; 878 kmem_free(ics, sizeof (iscsi_config_sess_t)); 879 return (ISCSI_STATUS_SUCCESS); 880 } 881 882 /* 883 * Since the sessions are bound we need to find the matching 884 * binding information for the session's isid. If this 885 * session's isid is > 0 then we need to get more configured 886 * session information to find the binding info. 887 */ 888 if (idx > 0) { 889 int ics_out; 890 891 ics_out = ics->ics_out; 892 /* record new size and free last buffer */ 893 size = ISCSI_SESSION_CONFIG_SIZE(ics_out); 894 kmem_free(ics, sizeof (*ics)); 895 896 /* allocate new buffer */ 897 ics = kmem_zalloc(size, KM_SLEEP); 898 ics->ics_in = ics_out; 899 900 /* get configured sessions information */ 901 if (persistent_get_config_session(name, ics) != B_TRUE) { 902 cmn_err(CE_NOTE, "iscsi session(%d) - " 903 "unable to get configured session information\n", 904 isp->sess_oid); 905 kmem_free(ics, size); 906 return (ISCSI_STATUS_SHUTDOWN); 907 } 908 } 909 910 /* Copy correct binding information to the connection */ 911 icp->conn_bound = B_TRUE; 912 if (ics->ics_bindings[idx].i_insize == sizeof (struct in_addr)) { 913 bcopy(&ics->ics_bindings[idx].i_addr.in4, 914 &icp->conn_bound_addr.sin4.sin_addr.s_addr, 915 sizeof (struct in_addr)); 916 icp->conn_bound_addr.sin4.sin_family = AF_INET; 917 } else { 918 bcopy(&ics->ics_bindings[idx].i_addr.in6, 919 &icp->conn_bound_addr.sin6.sin6_addr.s6_addr, 920 sizeof (struct in6_addr)); 921 icp->conn_bound_addr.sin6.sin6_family = AF_INET6; 922 } 923 924 kmem_free(ics, size); 925 926 return (ISCSI_STATUS_SUCCESS); 927 } 928 929 /* 930 * +--------------------------------------------------------------------+ 931 * | Internal Connection Interfaces | 932 * +--------------------------------------------------------------------+ 933 */ 934 935 /* 936 * iscsi_conn_flush_active_cmds - flush all active icmdps 937 * for a connection. 938 */ 939 static void 940 iscsi_conn_flush_active_cmds(iscsi_conn_t *icp) 941 { 942 iscsi_cmd_t *icmdp; 943 iscsi_sess_t *isp; 944 boolean_t lock_held = B_FALSE; 945 946 ASSERT(icp != NULL); 947 isp = icp->conn_sess; 948 ASSERT(isp != NULL); 949 950 if (mutex_owned(&icp->conn_queue_active.mutex)) { 951 lock_held = B_TRUE; 952 } else { 953 mutex_enter(&icp->conn_queue_active.mutex); 954 } 955 956 /* Flush active queue */ 957 icmdp = icp->conn_queue_active.head; 958 while (icmdp != NULL) { 959 960 mutex_enter(&icmdp->cmd_mutex); 961 if (icmdp->cmd_type == ISCSI_CMD_TYPE_SCSI) { 962 icmdp->cmd_un.scsi.pkt_stat |= STAT_ABORTED; 963 } 964 mutex_exit(&icmdp->cmd_mutex); 965 966 iscsi_cmd_state_machine(icmdp, 967 ISCSI_CMD_EVENT_E7, isp); 968 icmdp = icp->conn_queue_active.head; 969 } 970 971 /* Wait for active queue to drain */ 972 while (icp->conn_queue_active.count) { 973 mutex_exit(&icp->conn_queue_active.mutex); 974 delay(drv_usectohz(100000)); 975 mutex_enter(&icp->conn_queue_active.mutex); 976 } 977 978 if (lock_held == B_FALSE) { 979 mutex_exit(&icp->conn_queue_active.mutex); 980 } 981 982 /* Wait for IDM abort queue to drain (if necessary) */ 983 mutex_enter(&icp->conn_queue_idm_aborting.mutex); 984 while (icp->conn_queue_idm_aborting.count) { 985 mutex_exit(&icp->conn_queue_idm_aborting.mutex); 986 delay(drv_usectohz(100000)); 987 mutex_enter(&icp->conn_queue_idm_aborting.mutex); 988 } 989 mutex_exit(&icp->conn_queue_idm_aborting.mutex); 990 } 991 992 /* 993 * iscsi_conn_retry - retry connect/login 994 */ 995 void 996 iscsi_conn_retry(iscsi_sess_t *isp, iscsi_conn_t *icp) 997 { 998 iscsi_task_t *itp; 999 1000 ASSERT(isp != NULL); 1001 ASSERT(icp != NULL); 1002 1003 /* set login min/max time values */ 1004 iscsi_conn_set_login_min_max(icp, 1005 ISCSI_CONN_DEFAULT_LOGIN_MIN, 1006 icp->conn_tunable_params.conn_login_max); 1007 1008 ISCSI_CONN_LOG(CE_NOTE, "DEBUG: iscsi_conn_retry: icp: %p icp: %p ", 1009 (void *)icp, 1010 (void *)icp->conn_ic); 1011 1012 /* 1013 * Sync base connection information before login. 1014 * A login redirection might have shifted the 1015 * current information from the base. 1016 */ 1017 bcopy(&icp->conn_base_addr, &icp->conn_curr_addr, 1018 sizeof (icp->conn_curr_addr)); 1019 1020 /* schedule login task */ 1021 itp = kmem_zalloc(sizeof (iscsi_task_t), KM_SLEEP); 1022 itp->t_arg = icp; 1023 itp->t_blocking = B_FALSE; 1024 if (ddi_taskq_dispatch(isp->sess_taskq, 1025 (void(*)())iscsi_login_start, itp, DDI_SLEEP) != 1026 DDI_SUCCESS) { 1027 kmem_free(itp, sizeof (iscsi_task_t)); 1028 cmn_err(CE_WARN, "iscsi connection(%u) failure - " 1029 "unable to schedule login task", icp->conn_oid); 1030 1031 iscsi_conn_update_state(icp, ISCSI_CONN_STATE_FREE); 1032 mutex_enter(&isp->sess_state_mutex); 1033 iscsi_sess_state_machine(isp, 1034 ISCSI_SESS_EVENT_N6); 1035 mutex_exit(&isp->sess_state_mutex); 1036 } 1037 } 1038 1039 void 1040 iscsi_conn_update_state(iscsi_conn_t *icp, iscsi_conn_state_t 1041 next_state) 1042 { 1043 mutex_enter(&icp->conn_state_mutex); 1044 (void) iscsi_conn_update_state_locked(icp, next_state); 1045 mutex_exit(&icp->conn_state_mutex); 1046 } 1047 1048 void 1049 iscsi_conn_update_state_locked(iscsi_conn_t *icp, 1050 iscsi_conn_state_t next_state) 1051 { 1052 ASSERT(mutex_owned(&icp->conn_state_mutex)); 1053 next_state = (next_state > ISCSI_CONN_STATE_MAX) ? 1054 ISCSI_CONN_STATE_MAX : next_state; 1055 idm_sm_audit_state_change(&icp->conn_state_audit, 1056 SAS_ISCSI_CONN, icp->conn_state, next_state); 1057 switch (next_state) { 1058 case ISCSI_CONN_STATE_FREE: 1059 case ISCSI_CONN_STATE_IN_LOGIN: 1060 case ISCSI_CONN_STATE_LOGGED_IN: 1061 case ISCSI_CONN_STATE_IN_LOGOUT: 1062 case ISCSI_CONN_STATE_FAILED: 1063 case ISCSI_CONN_STATE_POLLING: 1064 ISCSI_CONN_LOG(CE_NOTE, 1065 "iscsi_conn_update_state conn %p %s(%d) -> %s(%d)", 1066 (void *)icp, 1067 iscsi_ics_name[icp->conn_state], icp->conn_state, 1068 iscsi_ics_name[next_state], next_state); 1069 icp->conn_prev_state = icp->conn_state; 1070 icp->conn_state = next_state; 1071 cv_broadcast(&icp->conn_state_change); 1072 break; 1073 default: 1074 cmn_err(CE_WARN, "Update state found illegal state: %x " 1075 "prev_state: %x", next_state, icp->conn_prev_state); 1076 ASSERT(0); 1077 } 1078 } 1079