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 (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright 2011, 2015 Nexenta Systems, Inc. All rights reserved.
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
iscsit_tgt_sm_event(iscsit_tgt_t * tgt,iscsit_tgt_event_t event)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
tgt_sm_event_locked(iscsit_tgt_t * tgt,iscsit_tgt_event_t event)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
tgt_sm_event_dispatch(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_created(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_onlining(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_online(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_stmf_online(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_deleting_need_offline(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_offlining(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_offline(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_stmf_offline(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_deleting_stmf_dereg(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_deleting_stmf_dereg_fail(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
tgt_sm_deleting(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx)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
iscsit_tgt_dereg_retry(void * arg)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) == TASKQID_INVALID) {
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
iscsit_tgt_dereg_task(void * arg)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
tgt_sm_new_state(iscsit_tgt_t * tgt,tgt_event_ctx_t * ctx,iscsit_tgt_state_t new_state)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
iscsit_config_merge_tgt(it_config_t * cfg)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 *
iscsit_tgt_lookup(char * target_name)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 *
iscsit_tgt_lookup_locked(char * target_name)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 *
iscsit_tgt_create(it_tgt_t * cfg_tgt)852 iscsit_tgt_create(it_tgt_t *cfg_tgt)
853 {
854 iscsit_tgt_t *result;
855 stmf_local_port_t *lport;
856 char *alias;
857
858 /*
859 * Each target is an STMF local port.
860 */
861 lport = stmf_alloc(STMF_STRUCT_STMF_LOCAL_PORT,
862 sizeof (iscsit_tgt_t) + sizeof (scsi_devid_desc_t) +
863 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN) + 1, 0);
864 if (lport == NULL) {
865 return (NULL);
866 }
867
868 result = lport->lport_port_private;
869 result->target_state = TS_CREATED;
870 result->target_stmf_lport_registered = 0;
871 /* Use pointer arithmetic to find scsi_devid_desc_t */
872 result->target_devid = (scsi_devid_desc_t *)(result + 1);
873 (void) strcpy((char *)result->target_devid->ident, cfg_tgt->tgt_name);
874 result->target_devid->ident_length =
875 strnlen(cfg_tgt->tgt_name, MAX_ISCSI_NODENAMELEN);
876 result->target_devid->protocol_id = PROTOCOL_iSCSI;
877 result->target_devid->piv = 1;
878 result->target_devid->code_set = CODE_SET_ASCII;
879 result->target_devid->association = ID_IS_TARGET_PORT;
880
881 /* Store a shortcut to the target name */
882 result->target_name = (char *)result->target_devid->ident;
883 idm_sm_audit_init(&result->target_state_audit);
884 mutex_init(&result->target_mutex, NULL, MUTEX_DEFAULT, NULL);
885 avl_create(&result->target_sess_list, iscsit_sess_avl_compare,
886 sizeof (iscsit_sess_t), offsetof(iscsit_sess_t, ist_tgt_ln));
887 avl_create(&result->target_tpgt_list, iscsit_tpgt_avl_compare,
888 sizeof (iscsit_tpgt_t), offsetof(iscsit_tpgt_t, tpgt_tgt_ln));
889 list_create(&result->target_events, sizeof (tgt_event_ctx_t),
890 offsetof(tgt_event_ctx_t, te_ctx_node));
891 idm_refcnt_init(&result->target_refcnt, result);
892 idm_refcnt_init(&result->target_sess_refcnt, result);
893
894 /* Set target alias */
895 if (nvlist_lookup_string(cfg_tgt->tgt_properties, "alias", &alias) == 0)
896 lport->lport_alias = strdup(alias);
897
898 /* Finish initializing local port */
899 /*
900 * Would like infinite timeout, but this is about as long as can
901 * be specified to stmf on a 32 bit kernel.
902 */
903 lport->lport_abort_timeout = 2000; /* seconds */
904 lport->lport_id = result->target_devid;
905 lport->lport_pp = iscsit_global.global_pp;
906 lport->lport_ds = iscsit_global.global_dbuf_store;
907 lport->lport_xfer_data = &iscsit_xfer_scsi_data;
908 lport->lport_send_status = &iscsit_send_scsi_status;
909 lport->lport_task_free = &iscsit_lport_task_free;
910 lport->lport_abort = &iscsit_abort;
911 lport->lport_ctl = &iscsit_ctl;
912 result->target_stmf_lport = lport;
913
914 /*
915 * We need a global hold until the STMF-ONLINE state machine
916 * completes. Acquire that hold now, in case we need to call
917 * iscsit_tgt_destroy, which will also release the hold.
918 */
919 iscsit_global_hold();
920
921 /*
922 * Additional target modifications from config
923 */
924 if (iscsit_tgt_modify(result, cfg_tgt) != IDM_STATUS_SUCCESS) {
925 iscsit_tgt_destroy(result);
926 return (NULL);
927 }
928
929 /*
930 * Register the target with STMF but not until we have all the
931 * TPGT bindings and any other additional config setup. STMF
932 * may immediately ask us to go online.
933 */
934 if (stmf_register_local_port(lport) != STMF_SUCCESS) {
935 iscsit_tgt_destroy(result);
936 return (NULL);
937 }
938 result->target_stmf_lport_registered = 1;
939
940 return (result);
941 }
942
943 static idm_status_t
iscsit_tgt_modify(iscsit_tgt_t * tgt,it_tgt_t * cfg_tgt)944 iscsit_tgt_modify(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt)
945 {
946 idm_status_t idmrc = IDM_STATUS_SUCCESS;
947 list_t tpgt_del_list;
948 char *alias;
949
950 /* Merge TPGT */
951 list_create(&tpgt_del_list, sizeof (iscsit_tpgt_t),
952 offsetof(iscsit_tpgt_t, tpgt_delete_ln));
953
954 mutex_enter(&tgt->target_mutex);
955 if (tgt->target_props) {
956 nvlist_free(tgt->target_props);
957 tgt->target_props = NULL;
958 }
959 (void) nvlist_dup(cfg_tgt->tgt_properties, &tgt->target_props,
960 KM_SLEEP);
961
962 /* Update alias */
963 if (tgt->target_stmf_lport->lport_alias) {
964 strfree(tgt->target_stmf_lport->lport_alias);
965 tgt->target_stmf_lport->lport_alias = NULL;
966 }
967 if (nvlist_lookup_string(tgt->target_props, "alias", &alias) == 0)
968 tgt->target_stmf_lport->lport_alias = strdup(alias);
969
970 if ((idmrc = iscsit_tgt_merge_tpgt(tgt, cfg_tgt, &tpgt_del_list)) !=
971 IDM_STATUS_SUCCESS) {
972 /* This should never happen */
973 cmn_err(CE_WARN, "Fail to configure TPGTs for "
974 "target %s, the target modification could not be "
975 "completed.", tgt->target_name);
976 }
977
978 mutex_exit(&tgt->target_mutex);
979
980 iscsit_config_destroy_tpgts(&tpgt_del_list);
981
982 /*
983 * If the target is truly modified (not newly created),
984 * inform iSNS to update the target registration.
985 */
986 if ((tgt->target_generation > 0) &&
987 (cfg_tgt->tgt_generation > tgt->target_generation)) {
988 iscsit_isns_target_update(tgt);
989 }
990
991 tgt->target_generation = cfg_tgt->tgt_generation;
992
993 return (idmrc);
994 }
995
996 void
iscsit_config_destroy_tpgts(list_t * tpgt_del_list)997 iscsit_config_destroy_tpgts(list_t *tpgt_del_list)
998 {
999 iscsit_tpgt_t *tpgt, *next_tpgt;
1000
1001 for (tpgt = list_head(tpgt_del_list);
1002 tpgt != NULL;
1003 tpgt = next_tpgt) {
1004 next_tpgt = list_next(tpgt_del_list, tpgt);
1005
1006 list_remove(tpgt_del_list, tpgt);
1007 idm_refcnt_wait_ref(&tpgt->tpgt_refcnt);
1008 iscsit_tpgt_destroy(tpgt);
1009 }
1010 }
1011
1012 void
iscsit_tgt_unref(void * tgt_void)1013 iscsit_tgt_unref(void *tgt_void)
1014 {
1015 iscsit_tgt_t *tgt = tgt_void;
1016
1017 ISCSIT_GLOBAL_LOCK(RW_WRITER);
1018 list_remove(&iscsit_global.global_deleted_target_list, tgt);
1019 ISCSIT_GLOBAL_UNLOCK();
1020 iscsit_tgt_destroy(tgt);
1021 }
1022
1023 void
iscsit_tgt_async_wait_ref(iscsit_tgt_t * tgt,idm_refcnt_cb_t * cb_func)1024 iscsit_tgt_async_wait_ref(iscsit_tgt_t *tgt, idm_refcnt_cb_t *cb_func)
1025 {
1026 idm_refcnt_async_wait_ref(&tgt->target_refcnt, cb_func);
1027 }
1028
1029 static void
iscsit_tgt_destroy(iscsit_tgt_t * tgt)1030 iscsit_tgt_destroy(iscsit_tgt_t *tgt)
1031 {
1032 iscsit_tpgt_t *tpgt, *next_tpgt;
1033
1034 ASSERT(tgt->target_state == TS_DELETING ||
1035 (tgt->target_state == TS_CREATED &&
1036 tgt->target_stmf_lport_registered == 0));
1037
1038 /*
1039 * Destroy all target portal group tags
1040 */
1041 mutex_enter(&tgt->target_mutex);
1042 for (tpgt = avl_first(&tgt->target_tpgt_list);
1043 tpgt != NULL;
1044 tpgt = next_tpgt) {
1045 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt);
1046 avl_remove(&tgt->target_tpgt_list, tpgt);
1047 iscsit_tpgt_destroy(tpgt);
1048 }
1049
1050 if (tgt->target_props) {
1051 nvlist_free(tgt->target_props);
1052 }
1053 mutex_exit(&tgt->target_mutex);
1054
1055 /*
1056 * Destroy target
1057 */
1058 idm_refcnt_destroy(&tgt->target_sess_refcnt);
1059 idm_refcnt_destroy(&tgt->target_refcnt);
1060 list_destroy(&tgt->target_events);
1061 avl_destroy(&tgt->target_tpgt_list);
1062 avl_destroy(&tgt->target_sess_list);
1063 mutex_destroy(&tgt->target_mutex);
1064 if (tgt->target_stmf_lport->lport_alias)
1065 strfree(tgt->target_stmf_lport->lport_alias);
1066 stmf_free(tgt->target_stmf_lport); /* Also frees "tgt' */
1067 iscsit_global_rele();
1068 }
1069
1070 void
iscsit_tgt_hold(iscsit_tgt_t * tgt)1071 iscsit_tgt_hold(iscsit_tgt_t *tgt)
1072 {
1073 idm_refcnt_hold(&tgt->target_refcnt);
1074 }
1075
1076 void
iscsit_tgt_rele(iscsit_tgt_t * tgt)1077 iscsit_tgt_rele(iscsit_tgt_t *tgt)
1078 {
1079 idm_refcnt_rele(&tgt->target_refcnt);
1080 }
1081
1082 int
iscsit_tgt_avl_compare(const void * void_tgt1,const void * void_tgt2)1083 iscsit_tgt_avl_compare(const void *void_tgt1, const void *void_tgt2)
1084 {
1085 const iscsit_tgt_t *tgt1 = void_tgt1;
1086 const iscsit_tgt_t *tgt2 = void_tgt2;
1087 int result;
1088
1089 /*
1090 * Sort by ISID first then TSIH
1091 */
1092 result = strcmp(tgt1->target_name, tgt2->target_name);
1093 if (result < 0) {
1094 return (-1);
1095 } else if (result > 0) {
1096 return (1);
1097 }
1098
1099 return (0);
1100 }
1101
1102
1103 iscsit_tpgt_t *
iscsit_tgt_lookup_tpgt(iscsit_tgt_t * tgt,uint16_t tag)1104 iscsit_tgt_lookup_tpgt(iscsit_tgt_t *tgt, uint16_t tag)
1105 {
1106 iscsit_tpgt_t *result;
1107
1108 mutex_enter(&tgt->target_mutex);
1109 result = iscsit_tgt_lookup_tpgt_locked(tgt, tag);
1110 mutex_exit(&tgt->target_mutex);
1111
1112 return (result);
1113 }
1114
1115 static iscsit_tpgt_t *
iscsit_tgt_lookup_tpgt_locked(iscsit_tgt_t * tgt,uint16_t tag)1116 iscsit_tgt_lookup_tpgt_locked(iscsit_tgt_t *tgt, uint16_t tag)
1117 {
1118 iscsit_tpgt_t tmp_tpgt;
1119 iscsit_tpgt_t *result;
1120
1121 /* Caller holds tgt->target_mutex */
1122 tmp_tpgt.tpgt_tag = tag;
1123 if ((result = avl_find(&tgt->target_tpgt_list, &tmp_tpgt, NULL)) !=
1124 NULL) {
1125 iscsit_tpgt_hold(result);
1126 }
1127
1128 return (result);
1129 }
1130
1131 iscsit_portal_t *
iscsit_tgt_lookup_portal(iscsit_tgt_t * tgt,struct sockaddr_storage * sa,iscsit_tpgt_t ** output_tpgt)1132 iscsit_tgt_lookup_portal(iscsit_tgt_t *tgt, struct sockaddr_storage *sa,
1133 iscsit_tpgt_t **output_tpgt)
1134 {
1135 iscsit_tpgt_t *tpgt;
1136 iscsit_portal_t *portal;
1137
1138 /* Caller holds tgt->target_mutex */
1139 ASSERT(mutex_owned(&tgt->target_mutex));
1140 for (tpgt = avl_first(&tgt->target_tpgt_list);
1141 tpgt != NULL;
1142 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) {
1143 portal = iscsit_tpg_portal_lookup(tpgt->tpgt_tpg, sa);
1144 if (portal) {
1145 iscsit_tpgt_hold(tpgt);
1146 *output_tpgt = tpgt;
1147 return (portal);
1148 }
1149 }
1150
1151 return (NULL);
1152 }
1153
1154
1155 void
iscsit_tgt_bind_sess(iscsit_tgt_t * tgt,iscsit_sess_t * sess)1156 iscsit_tgt_bind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess)
1157 {
1158 if (tgt) {
1159 sess->ist_lport = tgt->target_stmf_lport;
1160 iscsit_tgt_hold(tgt);
1161 idm_refcnt_hold(&tgt->target_sess_refcnt);
1162 mutex_enter(&tgt->target_mutex);
1163 avl_add(&tgt->target_sess_list, sess);
1164 mutex_exit(&tgt->target_mutex);
1165 } else {
1166 /* Discovery session */
1167 sess->ist_lport = NULL;
1168 ISCSIT_GLOBAL_LOCK(RW_WRITER);
1169 avl_add(&iscsit_global.global_discovery_sessions, sess);
1170 ISCSIT_GLOBAL_UNLOCK();
1171 }
1172 }
1173
1174 void
iscsit_tgt_unbind_sess(iscsit_tgt_t * tgt,iscsit_sess_t * sess)1175 iscsit_tgt_unbind_sess(iscsit_tgt_t *tgt, iscsit_sess_t *sess)
1176 {
1177 if (tgt) {
1178 mutex_enter(&tgt->target_mutex);
1179 avl_remove(&tgt->target_sess_list, sess);
1180 mutex_exit(&tgt->target_mutex);
1181 sess->ist_tgt = (iscsit_tgt_t *)SESS_UNBOUND_FROM_TGT;
1182 idm_refcnt_rele(&tgt->target_sess_refcnt);
1183 iscsit_tgt_rele(tgt);
1184 } else {
1185 /* Discovery session */
1186 ISCSIT_GLOBAL_LOCK(RW_WRITER);
1187 avl_remove(&iscsit_global.global_discovery_sessions, sess);
1188 ISCSIT_GLOBAL_UNLOCK();
1189 }
1190 }
1191
1192 #define LOCK_FOR_SESS_LOOKUP(lookup_tgt) { \
1193 if ((lookup_tgt) == NULL) { \
1194 ISCSIT_GLOBAL_LOCK(RW_READER); \
1195 } else { \
1196 mutex_enter(&(lookup_tgt)->target_mutex); \
1197 } \
1198 }
1199
1200 #define UNLOCK_FOR_SESS_LOOKUP(lookup_tgt) { \
1201 if ((lookup_tgt) == NULL) { \
1202 ISCSIT_GLOBAL_UNLOCK(); \
1203 } else { \
1204 mutex_exit(&(lookup_tgt)->target_mutex); \
1205 } \
1206 }
1207
1208 iscsit_sess_t *
iscsit_tgt_lookup_sess(iscsit_tgt_t * tgt,char * initiator_name,uint8_t * isid,uint16_t tsih,uint16_t tag)1209 iscsit_tgt_lookup_sess(iscsit_tgt_t *tgt, char *initiator_name,
1210 uint8_t *isid, uint16_t tsih, uint16_t tag)
1211 {
1212 iscsit_sess_t tmp_sess;
1213 avl_tree_t *sess_avl;
1214 avl_index_t where;
1215 iscsit_sess_t *result;
1216
1217 /*
1218 * If tgt is NULL then we are looking for a discovery session
1219 */
1220 if (tgt == NULL) {
1221 sess_avl = &iscsit_global.global_discovery_sessions;
1222 } else {
1223 sess_avl = &tgt->target_sess_list;
1224 }
1225
1226 LOCK_FOR_SESS_LOOKUP(tgt);
1227 if (avl_numnodes(sess_avl) == 0) {
1228 UNLOCK_FOR_SESS_LOOKUP(tgt);
1229 return (NULL);
1230 }
1231
1232 /*
1233 * We'll try to find a session matching ISID + TSIH first. If we
1234 * can't find one then we will return the closest match. If the
1235 * caller needs an exact match it must compare the TSIH after
1236 * the session is returned.
1237 *
1238 * The reason we do this "fuzzy matching" is to allow matching
1239 * sessions with different TSIH values on the same AVL list. This
1240 * makes session reinstatement much easier since the new session can
1241 * live on the list at the same time as the old session is cleaning up.
1242 */
1243 bcopy(isid, tmp_sess.ist_isid, ISCSI_ISID_LEN);
1244 tmp_sess.ist_initiator_name = initiator_name;
1245 tmp_sess.ist_tsih = tsih;
1246 tmp_sess.ist_tpgt_tag = tag;
1247
1248 result = avl_find(sess_avl, &tmp_sess, &where);
1249 if (result != NULL) {
1250 goto found_result;
1251 }
1252
1253 /*
1254 * avl_find_nearest() may return a result with a different ISID so
1255 * we should only return a result if the name and ISID match
1256 */
1257 result = avl_nearest(sess_avl, where, AVL_BEFORE);
1258 if ((result != NULL) &&
1259 (strcmp(result->ist_initiator_name, initiator_name) == 0) &&
1260 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) &&
1261 (result->ist_tpgt_tag == tag)) {
1262 goto found_result;
1263 }
1264
1265 result = avl_nearest(sess_avl, where, AVL_AFTER);
1266 if ((result != NULL) &&
1267 (strcmp(result->ist_initiator_name, initiator_name) == 0) &&
1268 (memcmp(result->ist_isid, isid, ISCSI_ISID_LEN) == 0) &&
1269 (result->ist_tpgt_tag == tag)) {
1270 goto found_result;
1271 }
1272
1273 result = NULL;
1274
1275 found_result:
1276 if ((result != NULL) &&
1277 (iscsit_sess_check_hold(result) != IDM_STATUS_SUCCESS)) {
1278 result = NULL;
1279 }
1280 UNLOCK_FOR_SESS_LOOKUP(tgt);
1281 return (result);
1282 }
1283
1284 static idm_status_t
iscsit_tgt_merge_tpgt(iscsit_tgt_t * tgt,it_tgt_t * cfg_tgt,list_t * tpgt_del_list)1285 iscsit_tgt_merge_tpgt(iscsit_tgt_t *tgt, it_tgt_t *cfg_tgt,
1286 list_t *tpgt_del_list)
1287 {
1288 iscsit_tpgt_t *tpgt, *next_tpgt;
1289 it_tpgt_t *cfg_tpgt;
1290 idm_status_t status = IDM_STATUS_SUCCESS;
1291
1292 /*
1293 * 1. >> Lock <<
1294 * 2. Removing all objects and place on a temp list
1295 * 3. Add new objects
1296 * 4. >> Unlock <<
1297 * 5. tpgt_del_list contains deleted objects
1298 */
1299 ASSERT(avl_is_empty(&tgt->target_tpgt_list) ||
1300 (tpgt_del_list != NULL));
1301
1302 if (tpgt_del_list) {
1303 for (tpgt = avl_first(&tgt->target_tpgt_list);
1304 tpgt != NULL; tpgt = next_tpgt) {
1305 next_tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt);
1306 avl_remove(&tgt->target_tpgt_list, tpgt);
1307 if (tgt->target_state == TS_STMF_ONLINE) {
1308 tpgt->tpgt_needs_tpg_offline = B_TRUE;
1309 }
1310 list_insert_tail(tpgt_del_list, tpgt);
1311 }
1312 }
1313
1314 if (cfg_tgt->tgt_tpgt_list != NULL) {
1315 /* Add currently defined TPGTs */
1316 for (cfg_tpgt = cfg_tgt->tgt_tpgt_list;
1317 cfg_tpgt != NULL;
1318 cfg_tpgt = cfg_tpgt->tpgt_next) {
1319 tpgt = iscsit_tpgt_create(cfg_tpgt);
1320 if (tpgt == NULL) {
1321 /*
1322 * There is a problem in the configuration we
1323 * received from the ioctl -- a missing tpg.
1324 * All the unbind operations have already
1325 * taken place. To leave the system in a
1326 * non-panic'd state, use the default tpgt.
1327 */
1328 status = IDM_STATUS_FAIL;
1329 continue;
1330 }
1331 if (tgt->target_state == TS_STMF_ONLINE) {
1332 (void) iscsit_tpg_online(tpgt->tpgt_tpg);
1333 }
1334 avl_add(&tgt->target_tpgt_list, tpgt);
1335 }
1336 }
1337
1338 /* If no TPGTs defined, add the default TPGT */
1339 if (avl_numnodes(&tgt->target_tpgt_list) == 0) {
1340 tpgt = iscsit_tpgt_create_default();
1341 if (tgt->target_state == TS_STMF_ONLINE) {
1342 (void) iscsit_tpg_online(tpgt->tpgt_tpg);
1343 }
1344 avl_add(&tgt->target_tpgt_list, tpgt);
1345 }
1346
1347 return (status);
1348 }
1349
1350 static iscsit_tpgt_t *
iscsit_tpgt_create(it_tpgt_t * cfg_tpgt)1351 iscsit_tpgt_create(it_tpgt_t *cfg_tpgt)
1352 {
1353 iscsit_tpg_t *tpg;
1354 iscsit_tpgt_t *result;
1355
1356 /* This takes a reference on the TPG */
1357 tpg = iscsit_tpg_lookup_locked(cfg_tpgt->tpgt_tpg_name);
1358 if (tpg == NULL)
1359 return (NULL);
1360
1361 result = kmem_zalloc(sizeof (*result), KM_SLEEP);
1362
1363 result->tpgt_tpg = tpg;
1364 result->tpgt_tag = cfg_tpgt->tpgt_tag;
1365
1366 return (result);
1367 }
1368
1369 iscsit_tpgt_t *
iscsit_tpgt_create_default()1370 iscsit_tpgt_create_default()
1371 {
1372 iscsit_tpgt_t *result;
1373
1374 result = kmem_zalloc(sizeof (*result), KM_SLEEP);
1375
1376 result->tpgt_tpg = iscsit_global.global_default_tpg;
1377 iscsit_tpg_hold(result->tpgt_tpg);
1378 result->tpgt_tag = ISCSIT_DEFAULT_TPGT;
1379
1380 return (result);
1381 }
1382
1383 void
iscsit_tpgt_destroy(iscsit_tpgt_t * tpgt)1384 iscsit_tpgt_destroy(iscsit_tpgt_t *tpgt)
1385 {
1386 if (tpgt->tpgt_needs_tpg_offline) {
1387 iscsit_tpg_offline(tpgt->tpgt_tpg);
1388 }
1389 iscsit_tpg_rele(tpgt->tpgt_tpg);
1390 kmem_free(tpgt, sizeof (*tpgt));
1391 }
1392
1393 void
iscsit_tpgt_hold(iscsit_tpgt_t * tpgt)1394 iscsit_tpgt_hold(iscsit_tpgt_t *tpgt)
1395 {
1396 idm_refcnt_hold(&tpgt->tpgt_refcnt);
1397 }
1398
1399 void
iscsit_tpgt_rele(iscsit_tpgt_t * tpgt)1400 iscsit_tpgt_rele(iscsit_tpgt_t *tpgt)
1401 {
1402 idm_refcnt_rele(&tpgt->tpgt_refcnt);
1403 }
1404
1405 int
iscsit_tpgt_avl_compare(const void * void_tpgt1,const void * void_tpgt2)1406 iscsit_tpgt_avl_compare(const void *void_tpgt1, const void *void_tpgt2)
1407 {
1408 const iscsit_tpgt_t *tpgt1 = void_tpgt1;
1409 const iscsit_tpgt_t *tpgt2 = void_tpgt2;
1410
1411 if (tpgt1->tpgt_tag < tpgt2->tpgt_tag)
1412 return (-1);
1413 else if (tpgt1->tpgt_tag > tpgt2->tpgt_tag)
1414 return (1);
1415
1416 return (0);
1417 }
1418
1419 static idm_status_t
iscsit_tgt_online(iscsit_tgt_t * tgt)1420 iscsit_tgt_online(iscsit_tgt_t *tgt)
1421 {
1422 iscsit_tpgt_t *tpgt, *tpgt_fail;
1423 idm_status_t rc;
1424
1425 mutex_enter(&tgt->target_mutex);
1426
1427 ASSERT(tgt->target_sess_list.avl_numnodes == 0);
1428 idm_refcnt_reset(&tgt->target_sess_refcnt);
1429 for (tpgt = avl_first(&tgt->target_tpgt_list);
1430 tpgt != NULL;
1431 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) {
1432 rc = iscsit_tpg_online(tpgt->tpgt_tpg);
1433 if (rc != IDM_STATUS_SUCCESS) {
1434 tpgt_fail = tpgt;
1435 goto tgt_online_fail;
1436 }
1437 }
1438
1439 mutex_exit(&tgt->target_mutex);
1440
1441 return (IDM_STATUS_SUCCESS);
1442
1443 tgt_online_fail:
1444 /* Offline all the tpgs we successfully onlined up to the failure */
1445 for (tpgt = avl_first(&tgt->target_tpgt_list);
1446 tpgt != tpgt_fail;
1447 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) {
1448 iscsit_tpg_offline(tpgt->tpgt_tpg);
1449 }
1450 mutex_exit(&tgt->target_mutex);
1451 return (rc);
1452 }
1453
1454 static void
iscsit_tgt_offline_cb(void * tgt_void)1455 iscsit_tgt_offline_cb(void *tgt_void)
1456 {
1457 iscsit_tgt_t *tgt = tgt_void;
1458 stmf_change_status_t scs;
1459
1460 iscsit_tgt_sm_event(tgt, TE_OFFLINE_COMPLETE);
1461
1462 scs.st_completion_status = STMF_SUCCESS;
1463 scs.st_additional_info = NULL;
1464 (void) stmf_ctl(STMF_CMD_LPORT_OFFLINE_COMPLETE,
1465 tgt->target_stmf_lport, &scs);
1466 }
1467
1468 static void
iscsit_tgt_offline(iscsit_tgt_t * tgt)1469 iscsit_tgt_offline(iscsit_tgt_t *tgt)
1470 {
1471 iscsit_tpgt_t *tpgt;
1472 iscsit_sess_t *ist;
1473
1474 mutex_enter(&tgt->target_mutex);
1475
1476 /* Offline target portal groups */
1477 for (tpgt = avl_first(&tgt->target_tpgt_list);
1478 tpgt != NULL;
1479 tpgt = AVL_NEXT(&tgt->target_tpgt_list, tpgt)) {
1480 iscsit_tpg_offline(tpgt->tpgt_tpg);
1481 }
1482
1483 /* Close any active sessions */
1484 for (ist = avl_first(&tgt->target_sess_list);
1485 ist != NULL;
1486 ist = AVL_NEXT(&tgt->target_sess_list, ist)) {
1487 /*
1488 * This is not a synchronous operation but after all
1489 * sessions have been cleaned up there will be no
1490 * more session-related holds on the target.
1491 */
1492 iscsit_sess_close(ist);
1493 }
1494
1495 mutex_exit(&tgt->target_mutex);
1496
1497 /*
1498 * Wait for all the sessions to quiesce.
1499 */
1500 idm_refcnt_async_wait_ref(&tgt->target_sess_refcnt,
1501 &iscsit_tgt_offline_cb);
1502 }
1503
1504 it_cfg_status_t
iscsit_config_merge_tpg(it_config_t * cfg,list_t * tpg_del_list)1505 iscsit_config_merge_tpg(it_config_t *cfg, list_t *tpg_del_list)
1506 {
1507 it_tpg_t *cfg_tpg;
1508 iscsit_tpg_t *tpg, *next_tpg;
1509
1510 /*
1511 * 1. >> Lock <<
1512 * 2. Removing deleted objects and place on a temp list
1513 * 3. Add new objects
1514 * 4. >> Unlock <<
1515 * 5. tpg_del_list contains objects to destroy
1516 */
1517 for (tpg = avl_first(&iscsit_global.global_tpg_list);
1518 tpg != NULL;
1519 tpg = next_tpg) {
1520 next_tpg = AVL_NEXT(&iscsit_global.global_tpg_list, tpg);
1521
1522 if (it_tpg_lookup(cfg, tpg->tpg_name) == NULL) {
1523 /*
1524 * The policy around when to allow a target portal
1525 * group to be deleted is implemented in libiscsit.
1526 * By the time the request gets to the kernel module
1527 * we expect that it conforms to policy so we will
1528 * cleanup all references to TPG and destroy it if it
1529 * is possible to do so.
1530 *
1531 */
1532 avl_remove(&iscsit_global.global_tpg_list, tpg);
1533 list_insert_tail(tpg_del_list, tpg);
1534 }
1535 }
1536
1537 /* Now walk through the list of configured target portal groups */
1538 for (cfg_tpg = cfg->config_tpg_list;
1539 cfg_tpg != NULL;
1540 cfg_tpg = cfg_tpg->tpg_next) {
1541 /* See if we have an existing target portal group */
1542 tpg = iscsit_tpg_lookup_locked(cfg_tpg->tpg_name);
1543
1544 if (tpg == NULL) {
1545 tpg = iscsit_tpg_create(cfg_tpg);
1546 ASSERT(tpg != NULL);
1547 avl_add(&iscsit_global.global_tpg_list, tpg);
1548 } else {
1549 mutex_enter(&tpg->tpg_mutex);
1550 iscsit_tpg_modify(tpg, cfg_tpg);
1551 mutex_exit(&tpg->tpg_mutex);
1552 iscsit_tpg_rele(tpg);
1553 }
1554 }
1555
1556 return (ITCFG_SUCCESS);
1557 }
1558
1559
1560 void
iscsit_config_destroy_tpgs(list_t * tpg_del_list)1561 iscsit_config_destroy_tpgs(list_t *tpg_del_list)
1562 {
1563 iscsit_tpg_t *tpg, *next_tpg;
1564
1565 /* Now finish destroying the target portal groups */
1566 for (tpg = list_head(tpg_del_list);
1567 tpg != NULL;
1568 tpg = next_tpg) {
1569 next_tpg = list_next(tpg_del_list, tpg);
1570 list_remove(tpg_del_list, tpg);
1571 idm_refcnt_wait_ref(&tpg->tpg_refcnt);
1572
1573 /* Kill it */
1574 iscsit_tpg_destroy(tpg);
1575 }
1576 }
1577
1578 iscsit_tpg_t *
iscsit_tpg_lookup(char * tpg_name)1579 iscsit_tpg_lookup(char *tpg_name)
1580 {
1581 iscsit_tpg_t *result;
1582
1583 ISCSIT_GLOBAL_LOCK(RW_READER);
1584 result = iscsit_tpg_lookup_locked(tpg_name);
1585 ISCSIT_GLOBAL_UNLOCK();
1586
1587 return (result);
1588 }
1589
1590 static iscsit_tpg_t *
iscsit_tpg_lookup_locked(char * tpg_name)1591 iscsit_tpg_lookup_locked(char *tpg_name)
1592 {
1593 iscsit_tpg_t tmp_tpg;
1594 iscsit_tpg_t *result;
1595
1596 (void) strlcpy(tmp_tpg.tpg_name, tpg_name, MAX_ISCSI_NODENAMELEN);
1597 if ((result = avl_find(&iscsit_global.global_tpg_list,
1598 &tmp_tpg, NULL)) != NULL) {
1599 iscsit_tpg_hold(result);
1600 }
1601
1602 return (result);
1603 }
1604
1605 iscsit_tpg_t *
iscsit_tpg_create(it_tpg_t * cfg_tpg)1606 iscsit_tpg_create(it_tpg_t *cfg_tpg)
1607 {
1608 iscsit_tpg_t *tpg;
1609
1610 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP);
1611
1612 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL);
1613 (void) strlcpy(tpg->tpg_name, cfg_tpg->tpg_name, MAX_TPG_NAMELEN);
1614 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare,
1615 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln));
1616 idm_refcnt_init(&tpg->tpg_refcnt, tpg);
1617
1618 mutex_enter(&tpg->tpg_mutex);
1619 iscsit_tpg_modify(tpg, cfg_tpg);
1620 mutex_exit(&tpg->tpg_mutex);
1621 iscsit_global_hold();
1622
1623 return (tpg);
1624 }
1625
1626 static void
iscsit_tpg_modify(iscsit_tpg_t * tpg,it_tpg_t * cfg_tpg)1627 iscsit_tpg_modify(iscsit_tpg_t *tpg, it_tpg_t *cfg_tpg)
1628 {
1629 iscsit_portal_t *portal, *next_portal;
1630 it_portal_t *cfg_portal;
1631
1632 /* Update portals */
1633 for (portal = avl_first(&tpg->tpg_portal_list);
1634 portal != NULL;
1635 portal = next_portal) {
1636 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal);
1637 if (it_portal_lookup(cfg_tpg, &portal->portal_addr) == NULL) {
1638 avl_remove(&tpg->tpg_portal_list, portal);
1639 iscsit_portal_delete(portal);
1640 /*
1641 * If the last portal is deleted from the target
1642 * portal group, then the tpg->tpg_online count
1643 * must be decremented. The other two callers of
1644 * iscsit_portal_delete() destroy the target portal
1645 * after deleting the portal so it is not necessary
1646 * to decrement the tpg->tpg_online count.
1647 */
1648 if (avl_is_empty(&tpg->tpg_portal_list)) {
1649 tpg->tpg_online--;
1650 }
1651 }
1652 }
1653
1654 for (cfg_portal = cfg_tpg->tpg_portal_list;
1655 cfg_portal != NULL;
1656 cfg_portal = cfg_portal->portal_next) {
1657 if ((portal = iscsit_tpg_portal_lookup_locked(tpg,
1658 &cfg_portal->portal_addr)) == NULL) {
1659 (void) iscsit_portal_create(tpg,
1660 &cfg_portal->portal_addr);
1661 } else {
1662 iscsit_portal_rele(portal);
1663 }
1664 }
1665 }
1666
1667 void
iscsit_tpg_destroy(iscsit_tpg_t * tpg)1668 iscsit_tpg_destroy(iscsit_tpg_t *tpg)
1669 {
1670 iscsit_portal_t *portal, *next_portal;
1671
1672 for (portal = avl_first(&tpg->tpg_portal_list);
1673 portal != NULL;
1674 portal = next_portal) {
1675 next_portal = AVL_NEXT(&tpg->tpg_portal_list, portal);
1676 avl_remove(&tpg->tpg_portal_list, portal);
1677 iscsit_portal_delete(portal);
1678 }
1679
1680 idm_refcnt_wait_ref(&tpg->tpg_refcnt);
1681 idm_refcnt_destroy(&tpg->tpg_refcnt);
1682 avl_destroy(&tpg->tpg_portal_list);
1683 mutex_destroy(&tpg->tpg_mutex);
1684 kmem_free(tpg, sizeof (*tpg));
1685 iscsit_global_rele();
1686 }
1687
1688 void
iscsit_tpg_hold(iscsit_tpg_t * tpg)1689 iscsit_tpg_hold(iscsit_tpg_t *tpg)
1690 {
1691 idm_refcnt_hold(&tpg->tpg_refcnt);
1692 }
1693
1694 void
iscsit_tpg_rele(iscsit_tpg_t * tpg)1695 iscsit_tpg_rele(iscsit_tpg_t *tpg)
1696 {
1697 idm_refcnt_rele(&tpg->tpg_refcnt);
1698 }
1699
1700 iscsit_tpg_t *
iscsit_tpg_createdefault()1701 iscsit_tpg_createdefault()
1702 {
1703 iscsit_tpg_t *tpg;
1704
1705 tpg = kmem_zalloc(sizeof (*tpg), KM_SLEEP);
1706
1707 mutex_init(&tpg->tpg_mutex, NULL, MUTEX_DEFAULT, NULL);
1708 (void) strlcpy(tpg->tpg_name, ISCSIT_DEFAULT_TPG, MAX_TPG_NAMELEN);
1709 avl_create(&tpg->tpg_portal_list, iscsit_portal_avl_compare,
1710 sizeof (iscsit_portal_t), offsetof(iscsit_portal_t, portal_tpg_ln));
1711 idm_refcnt_init(&tpg->tpg_refcnt, tpg);
1712
1713 /* Now create default portal */
1714 if (iscsit_portal_create(tpg, NULL) == NULL) {
1715 iscsit_tpg_destroy(tpg);
1716 return (NULL);
1717 }
1718
1719 return (tpg);
1720 }
1721
1722 void
iscsit_tpg_destroydefault(iscsit_tpg_t * tpg)1723 iscsit_tpg_destroydefault(iscsit_tpg_t *tpg)
1724 {
1725 iscsit_portal_t *portal;
1726
1727 portal = avl_first(&tpg->tpg_portal_list);
1728 ASSERT(portal != NULL);
1729 avl_remove(&tpg->tpg_portal_list, portal);
1730 iscsit_portal_delete(portal);
1731
1732 idm_refcnt_wait_ref(&tpg->tpg_refcnt);
1733 idm_refcnt_destroy(&tpg->tpg_refcnt);
1734 avl_destroy(&tpg->tpg_portal_list);
1735 mutex_destroy(&tpg->tpg_mutex);
1736 kmem_free(tpg, sizeof (*tpg));
1737 }
1738
1739 int
iscsit_tpg_avl_compare(const void * void_tpg1,const void * void_tpg2)1740 iscsit_tpg_avl_compare(const void *void_tpg1, const void *void_tpg2)
1741 {
1742 const iscsit_tpg_t *tpg1 = void_tpg1;
1743 const iscsit_tpg_t *tpg2 = void_tpg2;
1744 int result;
1745
1746 /*
1747 * Sort by ISID first then TSIH
1748 */
1749 result = strcmp(tpg1->tpg_name, tpg2->tpg_name);
1750 if (result < 0) {
1751 return (-1);
1752 } else if (result > 0) {
1753 return (1);
1754 }
1755
1756 return (0);
1757 }
1758
1759 idm_status_t
iscsit_tpg_online(iscsit_tpg_t * tpg)1760 iscsit_tpg_online(iscsit_tpg_t *tpg)
1761 {
1762 iscsit_portal_t *portal, *portal_fail;
1763 idm_status_t rc;
1764
1765 mutex_enter(&tpg->tpg_mutex);
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 rc = iscsit_portal_online(portal);
1771 if (rc != IDM_STATUS_SUCCESS) {
1772 portal_fail = portal;
1773 goto tpg_online_fail;
1774 }
1775 }
1776 }
1777 tpg->tpg_online++;
1778
1779 mutex_exit(&tpg->tpg_mutex);
1780 return (IDM_STATUS_SUCCESS);
1781
1782 tpg_online_fail:
1783 /* Offline all the portals we successfully onlined up to the failure */
1784 for (portal = avl_first(&tpg->tpg_portal_list);
1785 portal != portal_fail;
1786 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) {
1787 iscsit_portal_offline(portal);
1788 }
1789 mutex_exit(&tpg->tpg_mutex);
1790 return (rc);
1791 }
1792
1793 void
iscsit_tpg_offline(iscsit_tpg_t * tpg)1794 iscsit_tpg_offline(iscsit_tpg_t *tpg)
1795 {
1796 iscsit_portal_t *portal;
1797
1798 mutex_enter(&tpg->tpg_mutex);
1799 tpg->tpg_online--;
1800 if (tpg->tpg_online == 0) {
1801 for (portal = avl_first(&tpg->tpg_portal_list);
1802 portal != NULL;
1803 portal = AVL_NEXT(&tpg->tpg_portal_list, portal)) {
1804 iscsit_portal_offline(portal);
1805 }
1806 }
1807 mutex_exit(&tpg->tpg_mutex);
1808 }
1809
1810 iscsit_portal_t *
iscsit_tpg_portal_lookup(iscsit_tpg_t * tpg,struct sockaddr_storage * sa)1811 iscsit_tpg_portal_lookup(iscsit_tpg_t *tpg, struct sockaddr_storage *sa)
1812 {
1813 iscsit_portal_t *result;
1814
1815 mutex_enter(&tpg->tpg_mutex);
1816 result = iscsit_tpg_portal_lookup_locked(tpg, sa);
1817 mutex_exit(&tpg->tpg_mutex);
1818
1819 return (result);
1820 }
1821
1822 static iscsit_portal_t *
iscsit_tpg_portal_lookup_locked(iscsit_tpg_t * tpg,struct sockaddr_storage * sa)1823 iscsit_tpg_portal_lookup_locked(iscsit_tpg_t *tpg,
1824 struct sockaddr_storage *sa)
1825 {
1826 iscsit_portal_t tmp_portal;
1827 iscsit_portal_t *result;
1828
1829 /* Caller holds tpg->tpg_mutex */
1830 bcopy(sa, &tmp_portal.portal_addr, sizeof (*sa));
1831 if ((result = avl_find(&tpg->tpg_portal_list, &tmp_portal, NULL)) !=
1832 NULL) {
1833 iscsit_portal_hold(result);
1834 }
1835
1836 return (result);
1837 }
1838
1839 iscsit_portal_t *
iscsit_portal_create(iscsit_tpg_t * tpg,struct sockaddr_storage * sa)1840 iscsit_portal_create(iscsit_tpg_t *tpg, struct sockaddr_storage *sa)
1841 {
1842 iscsit_portal_t *portal;
1843
1844 portal = kmem_zalloc(sizeof (*portal), KM_SLEEP);
1845 /*
1846 * If (sa == NULL) then we are being asked to create the default
1847 * portal -- targets will use this portal when no portals are
1848 * explicitly configured.
1849 */
1850 if (sa == NULL) {
1851 portal->portal_default = B_TRUE;
1852 } else {
1853 portal->portal_default = B_FALSE;
1854 bcopy(sa, &portal->portal_addr, sizeof (*sa));
1855 }
1856
1857 idm_refcnt_init(&portal->portal_refcnt, portal);
1858
1859 /*
1860 * Add this portal to the list
1861 */
1862 avl_add(&tpg->tpg_portal_list, portal);
1863
1864 return (portal);
1865 }
1866
1867 void
iscsit_portal_delete(iscsit_portal_t * portal)1868 iscsit_portal_delete(iscsit_portal_t *portal)
1869 {
1870 if (portal->portal_online > 0) {
1871 iscsit_portal_offline(portal);
1872 }
1873
1874 if (portal->portal_online == 0) {
1875 ASSERT(portal->portal_svc == NULL);
1876 idm_refcnt_destroy(&portal->portal_refcnt);
1877 kmem_free(portal, sizeof (*portal));
1878 }
1879 }
1880
1881 void
iscsit_portal_hold(iscsit_portal_t * portal)1882 iscsit_portal_hold(iscsit_portal_t *portal)
1883 {
1884 idm_refcnt_hold(&portal->portal_refcnt);
1885 }
1886
1887 void
iscsit_portal_rele(iscsit_portal_t * portal)1888 iscsit_portal_rele(iscsit_portal_t *portal)
1889 {
1890 idm_refcnt_rele(&portal->portal_refcnt);
1891 }
1892
1893 int
iscsit_portal_avl_compare(const void * void_portal1,const void * void_portal2)1894 iscsit_portal_avl_compare(const void *void_portal1, const void *void_portal2)
1895 {
1896 const iscsit_portal_t *portal1 = void_portal1;
1897 const iscsit_portal_t *portal2 = void_portal2;
1898 const struct sockaddr_storage *ss1, *ss2;
1899 const struct in_addr *in1, *in2;
1900 const struct in6_addr *in61, *in62;
1901 int i;
1902
1903 /*
1904 * Compare ports, then address family, then ip address
1905 */
1906 ss1 = &portal1->portal_addr;
1907 ss2 = &portal2->portal_addr;
1908 if (((struct sockaddr_in *)ss1)->sin_port !=
1909 ((struct sockaddr_in *)ss2)->sin_port) {
1910 if (((struct sockaddr_in *)ss1)->sin_port >
1911 ((struct sockaddr_in *)ss2)->sin_port)
1912 return (1);
1913 else
1914 return (-1);
1915 }
1916
1917 /*
1918 * ports are the same
1919 */
1920 if (ss1->ss_family != ss2->ss_family) {
1921 if (ss1->ss_family == AF_INET)
1922 return (1);
1923 else
1924 return (-1);
1925 }
1926 /*
1927 * address families are the same
1928 */
1929 if (ss1->ss_family == AF_INET) {
1930 in1 = &((struct sockaddr_in *)ss1)->sin_addr;
1931 in2 = &((struct sockaddr_in *)ss2)->sin_addr;
1932
1933 if (in1->s_addr > in2->s_addr)
1934 return (1);
1935 else if (in1->s_addr < in2->s_addr)
1936 return (-1);
1937 else
1938 return (0);
1939 } else if (ss1->ss_family == AF_INET6) {
1940 in61 = &((struct sockaddr_in6 *)ss1)->sin6_addr;
1941 in62 = &((struct sockaddr_in6 *)ss2)->sin6_addr;
1942
1943 for (i = 0; i < 4; i++) {
1944 if (in61->s6_addr32[i] > in62->s6_addr32[i])
1945 return (1);
1946 else if (in61->s6_addr32[i] < in62->s6_addr32[i])
1947 return (-1);
1948 }
1949 return (0);
1950 } else
1951 cmn_err(CE_WARN,
1952 "iscsit_portal_avl_compare: unknown ss_family %d",
1953 ss1->ss_family);
1954
1955 return (1);
1956 }
1957
1958
1959 idm_status_t
iscsit_portal_online(iscsit_portal_t * portal)1960 iscsit_portal_online(iscsit_portal_t *portal)
1961 {
1962 idm_status_t rc = 0;
1963 idm_svc_t *svc;
1964 idm_svc_req_t sr;
1965 uint16_t port;
1966 struct sockaddr_in *sin;
1967
1968 /* Caller holds parent TPG mutex */
1969 if (portal->portal_online == 0) {
1970 /*
1971 * If there is no existing IDM service instance for this port,
1972 * create one. If the service exists, then the lookup,
1973 * creates a reference on the existing service.
1974 */
1975 sin = (struct sockaddr_in *)&portal->portal_addr;
1976 port = ntohs(sin->sin_port);
1977 if (port == 0)
1978 port = ISCSI_LISTEN_PORT;
1979 ASSERT(portal->portal_svc == NULL);
1980 if ((svc = idm_tgt_svc_lookup(port)) == NULL) {
1981 sr.sr_port = port;
1982 sr.sr_li = iscsit_global.global_li;
1983 sr.sr_conn_ops.icb_rx_scsi_cmd = &iscsit_op_scsi_cmd;
1984 sr.sr_conn_ops.icb_rx_scsi_rsp = &iscsit_rx_scsi_rsp;
1985 sr.sr_conn_ops.icb_rx_misc = &iscsit_rx_pdu;
1986 sr.sr_conn_ops.icb_rx_error = &iscsit_rx_pdu_error;
1987 sr.sr_conn_ops.icb_task_aborted = &iscsit_task_aborted;
1988 sr.sr_conn_ops.icb_client_notify =
1989 &iscsit_client_notify;
1990 sr.sr_conn_ops.icb_build_hdr = &iscsit_build_hdr;
1991 sr.sr_conn_ops.icb_update_statsn =
1992 &iscsit_update_statsn;
1993 sr.sr_conn_ops.icb_keepalive = &iscsit_keepalive;
1994
1995 if (idm_tgt_svc_create(&sr, &svc) !=
1996 IDM_STATUS_SUCCESS) {
1997 return (IDM_STATUS_FAIL);
1998 }
1999
2000 /* Get reference on the service we just created */
2001 idm_tgt_svc_hold(svc);
2002 }
2003 if ((rc = idm_tgt_svc_online(svc)) != IDM_STATUS_SUCCESS) {
2004 idm_tgt_svc_rele_and_destroy(svc);
2005 return (IDM_STATUS_FAIL);
2006 }
2007 portal->portal_svc = svc;
2008
2009 /*
2010 * Only call iSNS for first online
2011 */
2012 iscsit_isns_portal_online(portal);
2013 }
2014
2015 portal->portal_online++;
2016
2017 return (rc);
2018 }
2019
2020 void
iscsit_portal_offline(iscsit_portal_t * portal)2021 iscsit_portal_offline(iscsit_portal_t *portal)
2022 {
2023 portal->portal_online--;
2024
2025 if (portal->portal_online == 0) {
2026 /*
2027 * Only call iSNS for last offline
2028 */
2029 iscsit_isns_portal_offline(portal);
2030 idm_tgt_svc_offline(portal->portal_svc);
2031 /* If service is unreferenced, destroy it too */
2032 idm_tgt_svc_rele_and_destroy(portal->portal_svc);
2033 portal->portal_svc = NULL;
2034 }
2035
2036 }
2037
2038 it_cfg_status_t
iscsit_config_merge_ini(it_config_t * cfg)2039 iscsit_config_merge_ini(it_config_t *cfg)
2040 {
2041 iscsit_ini_t *ini, *next_ini;
2042 it_ini_t *cfg_ini;
2043
2044 /*
2045 * Initiator objects are so simple we will just destroy all the current
2046 * objects and build new ones. Nothing should ever reference an
2047 * initator object.. instead just lookup the initiator object and
2048 * grab the properties while holding the global config lock.
2049 */
2050 for (ini = avl_first(&iscsit_global.global_ini_list);
2051 ini != NULL;
2052 ini = next_ini) {
2053 next_ini = AVL_NEXT(&iscsit_global.global_ini_list, ini);
2054 avl_remove(&iscsit_global.global_ini_list, ini);
2055 nvlist_free(ini->ini_props);
2056 kmem_free(ini, sizeof (*ini));
2057 iscsit_global_rele();
2058 }
2059
2060 for (cfg_ini = cfg->config_ini_list;
2061 cfg_ini != NULL;
2062 cfg_ini = cfg_ini->ini_next) {
2063 ini = kmem_zalloc(sizeof (iscsit_ini_t), KM_SLEEP);
2064 (void) strlcpy(ini->ini_name, cfg_ini->ini_name,
2065 MAX_ISCSI_NODENAMELEN);
2066 (void) nvlist_dup(cfg_ini->ini_properties, &ini->ini_props,
2067 KM_SLEEP);
2068 avl_add(&iscsit_global.global_ini_list, ini);
2069 iscsit_global_hold();
2070 }
2071
2072 return (ITCFG_SUCCESS);
2073 }
2074
2075 int
iscsit_ini_avl_compare(const void * void_ini1,const void * void_ini2)2076 iscsit_ini_avl_compare(const void *void_ini1, const void *void_ini2)
2077 {
2078 const iscsit_ini_t *ini1 = void_ini1;
2079 const iscsit_ini_t *ini2 = void_ini2;
2080 int result;
2081
2082 /*
2083 * Sort by ISID first then TSIH
2084 */
2085 result = strcmp(ini1->ini_name, ini2->ini_name);
2086 if (result < 0) {
2087 return (-1);
2088 } else if (result > 0) {
2089 return (1);
2090 }
2091
2092 return (0);
2093 }
2094
2095 iscsit_ini_t *
iscsit_ini_lookup_locked(char * ini_name)2096 iscsit_ini_lookup_locked(char *ini_name)
2097 {
2098 iscsit_ini_t tmp_ini;
2099 iscsit_ini_t *result;
2100
2101 /*
2102 * Use a dummy target for lookup, filling in all fields used in AVL
2103 * comparison.
2104 */
2105 (void) strlcpy(tmp_ini.ini_name, ini_name, MAX_ISCSI_NODENAMELEN);
2106 result = avl_find(&iscsit_global.global_ini_list, &tmp_ini, NULL);
2107
2108 return (result);
2109 }
2110