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28#include <linux/slab.h>
29#include <linux/spinlock.h>
30#include <linux/list.h>
31#include <scsi/scsi.h>
32#include <scsi/scsi_cmnd.h>
33#include <asm/unaligned.h>
34
35#include <target/target_core_base.h>
36#include <target/target_core_backend.h>
37#include <target/target_core_fabric.h>
38#include <target/target_core_configfs.h>
39
40#include "target_core_internal.h"
41#include "target_core_pr.h"
42#include "target_core_ua.h"
43
44
45
46
47struct pr_transport_id_holder {
48 int dest_local_nexus;
49 struct t10_pr_registration *dest_pr_reg;
50 struct se_portal_group *dest_tpg;
51 struct se_node_acl *dest_node_acl;
52 struct se_dev_entry *dest_se_deve;
53 struct list_head dest_list;
54};
55
56int core_pr_dump_initiator_port(
57 struct t10_pr_registration *pr_reg,
58 char *buf,
59 u32 size)
60{
61 if (!pr_reg->isid_present_at_reg)
62 return 0;
63
64 snprintf(buf, size, ",i,0x%s", &pr_reg->pr_reg_isid[0]);
65 return 1;
66}
67
68static void __core_scsi3_complete_pro_release(struct se_device *, struct se_node_acl *,
69 struct t10_pr_registration *, int);
70
71static int core_scsi2_reservation_seq_non_holder(
72 struct se_cmd *cmd,
73 unsigned char *cdb,
74 u32 pr_reg_type)
75{
76 switch (cdb[0]) {
77 case INQUIRY:
78 case RELEASE:
79 case RELEASE_10:
80 return 0;
81 default:
82 return 1;
83 }
84
85 return 1;
86}
87
88static int core_scsi2_reservation_check(struct se_cmd *cmd, u32 *pr_reg_type)
89{
90 struct se_device *dev = cmd->se_dev;
91 struct se_session *sess = cmd->se_sess;
92 int ret;
93
94 if (!sess)
95 return 0;
96
97 spin_lock(&dev->dev_reservation_lock);
98 if (!dev->dev_reserved_node_acl || !sess) {
99 spin_unlock(&dev->dev_reservation_lock);
100 return 0;
101 }
102 if (dev->dev_reserved_node_acl != sess->se_node_acl) {
103 spin_unlock(&dev->dev_reservation_lock);
104 return -EINVAL;
105 }
106 if (!(dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID)) {
107 spin_unlock(&dev->dev_reservation_lock);
108 return 0;
109 }
110 ret = (dev->dev_res_bin_isid == sess->sess_bin_isid) ? 0 : -EINVAL;
111 spin_unlock(&dev->dev_reservation_lock);
112
113 return ret;
114}
115
116static struct t10_pr_registration *core_scsi3_locate_pr_reg(struct se_device *,
117 struct se_node_acl *, struct se_session *);
118static void core_scsi3_put_pr_reg(struct t10_pr_registration *);
119
120static int target_check_scsi2_reservation_conflict(struct se_cmd *cmd)
121{
122 struct se_session *se_sess = cmd->se_sess;
123 struct se_subsystem_dev *su_dev = cmd->se_dev->se_sub_dev;
124 struct t10_pr_registration *pr_reg;
125 struct t10_reservation *pr_tmpl = &su_dev->t10_pr;
126 int crh = (su_dev->t10_pr.res_type == SPC3_PERSISTENT_RESERVATIONS);
127 int conflict = 0;
128
129 if (!crh)
130 return -EINVAL;
131
132 pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
133 se_sess);
134 if (pr_reg) {
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156 if (pr_reg->pr_res_holder) {
157 core_scsi3_put_pr_reg(pr_reg);
158 return 1;
159 }
160 if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
161 (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) ||
162 (pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
163 (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
164 core_scsi3_put_pr_reg(pr_reg);
165 return 1;
166 }
167 core_scsi3_put_pr_reg(pr_reg);
168 conflict = 1;
169 } else {
170
171
172
173
174
175
176
177
178
179
180 spin_lock(&pr_tmpl->registration_lock);
181 conflict = (list_empty(&pr_tmpl->registration_list)) ? 0 : 1;
182 spin_unlock(&pr_tmpl->registration_lock);
183 }
184
185 if (conflict) {
186 pr_err("Received legacy SPC-2 RESERVE/RELEASE"
187 " while active SPC-3 registrations exist,"
188 " returning RESERVATION_CONFLICT\n");
189 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
190 return -EBUSY;
191 }
192
193 return 0;
194}
195
196int target_scsi2_reservation_release(struct se_cmd *cmd)
197{
198 struct se_device *dev = cmd->se_dev;
199 struct se_session *sess = cmd->se_sess;
200 struct se_portal_group *tpg;
201 int ret = 0, rc;
202
203 if (!sess || !sess->se_tpg)
204 goto out;
205 rc = target_check_scsi2_reservation_conflict(cmd);
206 if (rc == 1)
207 goto out;
208 else if (rc < 0) {
209 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
210 ret = -EINVAL;
211 goto out;
212 }
213
214 ret = 0;
215 spin_lock(&dev->dev_reservation_lock);
216 if (!dev->dev_reserved_node_acl || !sess)
217 goto out_unlock;
218
219 if (dev->dev_reserved_node_acl != sess->se_node_acl)
220 goto out_unlock;
221
222 if (dev->dev_res_bin_isid != sess->sess_bin_isid)
223 goto out_unlock;
224
225 dev->dev_reserved_node_acl = NULL;
226 dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
227 if (dev->dev_flags & DF_SPC2_RESERVATIONS_WITH_ISID) {
228 dev->dev_res_bin_isid = 0;
229 dev->dev_flags &= ~DF_SPC2_RESERVATIONS_WITH_ISID;
230 }
231 tpg = sess->se_tpg;
232 pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
233 " MAPPED LUN: %u for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
234 cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
235 sess->se_node_acl->initiatorname);
236
237out_unlock:
238 spin_unlock(&dev->dev_reservation_lock);
239out:
240 if (!ret)
241 target_complete_cmd(cmd, GOOD);
242 return ret;
243}
244
245int target_scsi2_reservation_reserve(struct se_cmd *cmd)
246{
247 struct se_device *dev = cmd->se_dev;
248 struct se_session *sess = cmd->se_sess;
249 struct se_portal_group *tpg;
250 int ret = 0, rc;
251
252 if ((cmd->t_task_cdb[1] & 0x01) &&
253 (cmd->t_task_cdb[1] & 0x02)) {
254 pr_err("LongIO and Obselete Bits set, returning"
255 " ILLEGAL_REQUEST\n");
256 cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE;
257 ret = -EINVAL;
258 goto out;
259 }
260
261
262
263
264 if (!sess || !sess->se_tpg)
265 goto out;
266 rc = target_check_scsi2_reservation_conflict(cmd);
267 if (rc == 1)
268 goto out;
269 else if (rc < 0) {
270 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
271 ret = -EINVAL;
272 goto out;
273 }
274
275 ret = 0;
276 tpg = sess->se_tpg;
277 spin_lock(&dev->dev_reservation_lock);
278 if (dev->dev_reserved_node_acl &&
279 (dev->dev_reserved_node_acl != sess->se_node_acl)) {
280 pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
281 tpg->se_tpg_tfo->get_fabric_name());
282 pr_err("Original reserver LUN: %u %s\n",
283 cmd->se_lun->unpacked_lun,
284 dev->dev_reserved_node_acl->initiatorname);
285 pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
286 " from %s \n", cmd->se_lun->unpacked_lun,
287 cmd->se_deve->mapped_lun,
288 sess->se_node_acl->initiatorname);
289 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
290 ret = -EINVAL;
291 goto out_unlock;
292 }
293
294 dev->dev_reserved_node_acl = sess->se_node_acl;
295 dev->dev_flags |= DF_SPC2_RESERVATIONS;
296 if (sess->sess_bin_isid != 0) {
297 dev->dev_res_bin_isid = sess->sess_bin_isid;
298 dev->dev_flags |= DF_SPC2_RESERVATIONS_WITH_ISID;
299 }
300 pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
301 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
302 cmd->se_lun->unpacked_lun, cmd->se_deve->mapped_lun,
303 sess->se_node_acl->initiatorname);
304
305out_unlock:
306 spin_unlock(&dev->dev_reservation_lock);
307out:
308 if (!ret)
309 target_complete_cmd(cmd, GOOD);
310 return ret;
311}
312
313
314
315
316
317
318
319
320static int core_scsi3_pr_seq_non_holder(
321 struct se_cmd *cmd,
322 unsigned char *cdb,
323 u32 pr_reg_type)
324{
325 struct se_dev_entry *se_deve;
326 struct se_session *se_sess = cmd->se_sess;
327 int other_cdb = 0, ignore_reg;
328 int registered_nexus = 0, ret = 1;
329 int all_reg = 0, reg_only = 0;
330 int we = 0;
331 int legacy = 0;
332
333
334
335
336 if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS)
337 return core_scsi2_reservation_seq_non_holder(cmd,
338 cdb, pr_reg_type);
339
340 se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
341
342
343
344
345 ignore_reg = (pr_reg_type & 0x80000000);
346 if (ignore_reg)
347 pr_reg_type &= ~0x80000000;
348
349 switch (pr_reg_type) {
350 case PR_TYPE_WRITE_EXCLUSIVE:
351 we = 1;
352 case PR_TYPE_EXCLUSIVE_ACCESS:
353
354
355
356
357 if ((se_deve->def_pr_registered) && !(ignore_reg))
358 registered_nexus = 1;
359 break;
360 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
361 we = 1;
362 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
363
364
365
366 reg_only = 1;
367 if ((se_deve->def_pr_registered) && !(ignore_reg))
368 registered_nexus = 1;
369 break;
370 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
371 we = 1;
372 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
373
374
375
376 all_reg = 1;
377 if ((se_deve->def_pr_registered) && !(ignore_reg))
378 registered_nexus = 1;
379 break;
380 default:
381 return -EINVAL;
382 }
383
384
385
386 switch (cdb[0]) {
387 case SECURITY_PROTOCOL_IN:
388 if (registered_nexus)
389 return 0;
390 ret = (we) ? 0 : 1;
391 break;
392 case MODE_SENSE:
393 case MODE_SENSE_10:
394 case READ_ATTRIBUTE:
395 case READ_BUFFER:
396 case RECEIVE_DIAGNOSTIC:
397 if (legacy) {
398 ret = 1;
399 break;
400 }
401 if (registered_nexus) {
402 ret = 0;
403 break;
404 }
405 ret = (we) ? 0 : 1;
406 break;
407 case PERSISTENT_RESERVE_OUT:
408
409
410
411
412
413 switch (cdb[1] & 0x1f) {
414 case PRO_CLEAR:
415 case PRO_PREEMPT:
416 case PRO_PREEMPT_AND_ABORT:
417 ret = (registered_nexus) ? 0 : 1;
418 break;
419 case PRO_REGISTER:
420 case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
421 ret = 0;
422 break;
423 case PRO_REGISTER_AND_MOVE:
424 case PRO_RESERVE:
425 ret = 1;
426 break;
427 case PRO_RELEASE:
428 ret = (registered_nexus) ? 0 : 1;
429 break;
430 default:
431 pr_err("Unknown PERSISTENT_RESERVE_OUT service"
432 " action: 0x%02x\n", cdb[1] & 0x1f);
433 return -EINVAL;
434 }
435 break;
436 case RELEASE:
437 case RELEASE_10:
438
439 ret = 0;
440 break;
441 case RESERVE:
442 case RESERVE_10:
443
444 ret = 0;
445 break;
446 case TEST_UNIT_READY:
447 ret = (legacy) ? 1 : 0;
448 break;
449 case MAINTENANCE_IN:
450 switch (cdb[1] & 0x1f) {
451 case MI_MANAGEMENT_PROTOCOL_IN:
452 if (registered_nexus) {
453 ret = 0;
454 break;
455 }
456 ret = (we) ? 0 : 1;
457 break;
458 case MI_REPORT_SUPPORTED_OPERATION_CODES:
459 case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS:
460 if (legacy) {
461 ret = 1;
462 break;
463 }
464 if (registered_nexus) {
465 ret = 0;
466 break;
467 }
468 ret = (we) ? 0 : 1;
469 break;
470 case MI_REPORT_ALIASES:
471 case MI_REPORT_IDENTIFYING_INFORMATION:
472 case MI_REPORT_PRIORITY:
473 case MI_REPORT_TARGET_PGS:
474 case MI_REPORT_TIMESTAMP:
475 ret = 0;
476 break;
477 default:
478 pr_err("Unknown MI Service Action: 0x%02x\n",
479 (cdb[1] & 0x1f));
480 return -EINVAL;
481 }
482 break;
483 case ACCESS_CONTROL_IN:
484 case ACCESS_CONTROL_OUT:
485 case INQUIRY:
486 case LOG_SENSE:
487 case READ_MEDIA_SERIAL_NUMBER:
488 case REPORT_LUNS:
489 case REQUEST_SENSE:
490 case PERSISTENT_RESERVE_IN:
491 ret = 0;
492 break;
493 default:
494 other_cdb = 1;
495 break;
496 }
497
498
499
500
501 if (!ret && !other_cdb) {
502 pr_debug("Allowing explict CDB: 0x%02x for %s"
503 " reservation holder\n", cdb[0],
504 core_scsi3_pr_dump_type(pr_reg_type));
505
506 return ret;
507 }
508
509
510
511
512 if (we && !registered_nexus) {
513 if (cmd->data_direction == DMA_TO_DEVICE) {
514
515
516
517 pr_debug("%s Conflict for unregistered nexus"
518 " %s CDB: 0x%02x to %s reservation\n",
519 transport_dump_cmd_direction(cmd),
520 se_sess->se_node_acl->initiatorname, cdb[0],
521 core_scsi3_pr_dump_type(pr_reg_type));
522 return 1;
523 } else {
524
525
526
527
528
529
530
531
532
533
534 if (!registered_nexus) {
535 pr_debug("Allowing implict CDB: 0x%02x"
536 " for %s reservation on unregistered"
537 " nexus\n", cdb[0],
538 core_scsi3_pr_dump_type(pr_reg_type));
539 }
540
541 return 0;
542 }
543 } else if ((reg_only) || (all_reg)) {
544 if (registered_nexus) {
545
546
547
548
549
550 pr_debug("Allowing implict CDB: 0x%02x for %s"
551 " reservation\n", cdb[0],
552 core_scsi3_pr_dump_type(pr_reg_type));
553
554 return 0;
555 }
556 }
557 pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x"
558 " for %s reservation\n", transport_dump_cmd_direction(cmd),
559 (registered_nexus) ? "" : "un",
560 se_sess->se_node_acl->initiatorname, cdb[0],
561 core_scsi3_pr_dump_type(pr_reg_type));
562
563 return 1;
564}
565
566static u32 core_scsi3_pr_generation(struct se_device *dev)
567{
568 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
569 u32 prg;
570
571
572
573
574
575
576
577
578
579 spin_lock(&dev->dev_reservation_lock);
580 prg = su_dev->t10_pr.pr_generation++;
581 spin_unlock(&dev->dev_reservation_lock);
582
583 return prg;
584}
585
586static int core_scsi3_pr_reservation_check(
587 struct se_cmd *cmd,
588 u32 *pr_reg_type)
589{
590 struct se_device *dev = cmd->se_dev;
591 struct se_session *sess = cmd->se_sess;
592 int ret;
593
594 if (!sess)
595 return 0;
596
597
598
599 if (dev->dev_flags & DF_SPC2_RESERVATIONS)
600 return core_scsi2_reservation_check(cmd, pr_reg_type);
601
602 spin_lock(&dev->dev_reservation_lock);
603 if (!dev->dev_pr_res_holder) {
604 spin_unlock(&dev->dev_reservation_lock);
605 return 0;
606 }
607 *pr_reg_type = dev->dev_pr_res_holder->pr_res_type;
608 cmd->pr_res_key = dev->dev_pr_res_holder->pr_res_key;
609 if (dev->dev_pr_res_holder->pr_reg_nacl != sess->se_node_acl) {
610 spin_unlock(&dev->dev_reservation_lock);
611 return -EINVAL;
612 }
613 if (!dev->dev_pr_res_holder->isid_present_at_reg) {
614 spin_unlock(&dev->dev_reservation_lock);
615 return 0;
616 }
617 ret = (dev->dev_pr_res_holder->pr_reg_bin_isid ==
618 sess->sess_bin_isid) ? 0 : -EINVAL;
619
620
621
622
623 if (ret != 0)
624 *pr_reg_type |= 0x80000000;
625 spin_unlock(&dev->dev_reservation_lock);
626
627 return ret;
628}
629
630static struct t10_pr_registration *__core_scsi3_do_alloc_registration(
631 struct se_device *dev,
632 struct se_node_acl *nacl,
633 struct se_dev_entry *deve,
634 unsigned char *isid,
635 u64 sa_res_key,
636 int all_tg_pt,
637 int aptpl)
638{
639 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
640 struct t10_pr_registration *pr_reg;
641
642 pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_ATOMIC);
643 if (!pr_reg) {
644 pr_err("Unable to allocate struct t10_pr_registration\n");
645 return NULL;
646 }
647
648 pr_reg->pr_aptpl_buf = kzalloc(su_dev->t10_pr.pr_aptpl_buf_len,
649 GFP_ATOMIC);
650 if (!pr_reg->pr_aptpl_buf) {
651 pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n");
652 kmem_cache_free(t10_pr_reg_cache, pr_reg);
653 return NULL;
654 }
655
656 INIT_LIST_HEAD(&pr_reg->pr_reg_list);
657 INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
658 INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
659 INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
660 INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
661 atomic_set(&pr_reg->pr_res_holders, 0);
662 pr_reg->pr_reg_nacl = nacl;
663 pr_reg->pr_reg_deve = deve;
664 pr_reg->pr_res_mapped_lun = deve->mapped_lun;
665 pr_reg->pr_aptpl_target_lun = deve->se_lun->unpacked_lun;
666 pr_reg->pr_res_key = sa_res_key;
667 pr_reg->pr_reg_all_tg_pt = all_tg_pt;
668 pr_reg->pr_reg_aptpl = aptpl;
669 pr_reg->pr_reg_tg_pt_lun = deve->se_lun;
670
671
672
673
674 if (isid != NULL) {
675 pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
676 snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
677 pr_reg->isid_present_at_reg = 1;
678 }
679
680 return pr_reg;
681}
682
683static int core_scsi3_lunacl_depend_item(struct se_dev_entry *);
684static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *);
685
686
687
688
689
690static struct t10_pr_registration *__core_scsi3_alloc_registration(
691 struct se_device *dev,
692 struct se_node_acl *nacl,
693 struct se_dev_entry *deve,
694 unsigned char *isid,
695 u64 sa_res_key,
696 int all_tg_pt,
697 int aptpl)
698{
699 struct se_dev_entry *deve_tmp;
700 struct se_node_acl *nacl_tmp;
701 struct se_port *port, *port_tmp;
702 struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
703 struct t10_pr_registration *pr_reg, *pr_reg_atp, *pr_reg_tmp, *pr_reg_tmp_safe;
704 int ret;
705
706
707
708
709 pr_reg = __core_scsi3_do_alloc_registration(dev, nacl, deve, isid,
710 sa_res_key, all_tg_pt, aptpl);
711 if (!pr_reg)
712 return NULL;
713
714
715
716 if (!all_tg_pt)
717 return pr_reg;
718
719
720
721
722 spin_lock(&dev->se_port_lock);
723 list_for_each_entry_safe(port, port_tmp, &dev->dev_sep_list, sep_list) {
724 atomic_inc(&port->sep_tg_pt_ref_cnt);
725 smp_mb__after_atomic_inc();
726 spin_unlock(&dev->se_port_lock);
727
728 spin_lock_bh(&port->sep_alua_lock);
729 list_for_each_entry(deve_tmp, &port->sep_alua_list,
730 alua_port_list) {
731
732
733
734
735
736 if (!deve_tmp->se_lun_acl)
737 continue;
738
739 nacl_tmp = deve_tmp->se_lun_acl->se_lun_nacl;
740
741
742
743
744 if (nacl == nacl_tmp)
745 continue;
746
747
748
749
750
751 if (tfo != nacl_tmp->se_tpg->se_tpg_tfo)
752 continue;
753
754
755
756 if (strcmp(nacl->initiatorname, nacl_tmp->initiatorname))
757 continue;
758
759 atomic_inc(&deve_tmp->pr_ref_count);
760 smp_mb__after_atomic_inc();
761 spin_unlock_bh(&port->sep_alua_lock);
762
763
764
765
766
767
768 ret = core_scsi3_lunacl_depend_item(deve_tmp);
769 if (ret < 0) {
770 pr_err("core_scsi3_lunacl_depend"
771 "_item() failed\n");
772 atomic_dec(&port->sep_tg_pt_ref_cnt);
773 smp_mb__after_atomic_dec();
774 atomic_dec(&deve_tmp->pr_ref_count);
775 smp_mb__after_atomic_dec();
776 goto out;
777 }
778
779
780
781
782
783
784
785 pr_reg_atp = __core_scsi3_do_alloc_registration(dev,
786 nacl_tmp, deve_tmp, NULL,
787 sa_res_key, all_tg_pt, aptpl);
788 if (!pr_reg_atp) {
789 atomic_dec(&port->sep_tg_pt_ref_cnt);
790 smp_mb__after_atomic_dec();
791 atomic_dec(&deve_tmp->pr_ref_count);
792 smp_mb__after_atomic_dec();
793 core_scsi3_lunacl_undepend_item(deve_tmp);
794 goto out;
795 }
796
797 list_add_tail(&pr_reg_atp->pr_reg_atp_mem_list,
798 &pr_reg->pr_reg_atp_list);
799 spin_lock_bh(&port->sep_alua_lock);
800 }
801 spin_unlock_bh(&port->sep_alua_lock);
802
803 spin_lock(&dev->se_port_lock);
804 atomic_dec(&port->sep_tg_pt_ref_cnt);
805 smp_mb__after_atomic_dec();
806 }
807 spin_unlock(&dev->se_port_lock);
808
809 return pr_reg;
810out:
811 list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
812 &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
813 list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
814 core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
815 kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
816 }
817 kmem_cache_free(t10_pr_reg_cache, pr_reg);
818 return NULL;
819}
820
821int core_scsi3_alloc_aptpl_registration(
822 struct t10_reservation *pr_tmpl,
823 u64 sa_res_key,
824 unsigned char *i_port,
825 unsigned char *isid,
826 u32 mapped_lun,
827 unsigned char *t_port,
828 u16 tpgt,
829 u32 target_lun,
830 int res_holder,
831 int all_tg_pt,
832 u8 type)
833{
834 struct t10_pr_registration *pr_reg;
835
836 if (!i_port || !t_port || !sa_res_key) {
837 pr_err("Illegal parameters for APTPL registration\n");
838 return -EINVAL;
839 }
840
841 pr_reg = kmem_cache_zalloc(t10_pr_reg_cache, GFP_KERNEL);
842 if (!pr_reg) {
843 pr_err("Unable to allocate struct t10_pr_registration\n");
844 return -ENOMEM;
845 }
846 pr_reg->pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len, GFP_KERNEL);
847
848 INIT_LIST_HEAD(&pr_reg->pr_reg_list);
849 INIT_LIST_HEAD(&pr_reg->pr_reg_abort_list);
850 INIT_LIST_HEAD(&pr_reg->pr_reg_aptpl_list);
851 INIT_LIST_HEAD(&pr_reg->pr_reg_atp_list);
852 INIT_LIST_HEAD(&pr_reg->pr_reg_atp_mem_list);
853 atomic_set(&pr_reg->pr_res_holders, 0);
854 pr_reg->pr_reg_nacl = NULL;
855 pr_reg->pr_reg_deve = NULL;
856 pr_reg->pr_res_mapped_lun = mapped_lun;
857 pr_reg->pr_aptpl_target_lun = target_lun;
858 pr_reg->pr_res_key = sa_res_key;
859 pr_reg->pr_reg_all_tg_pt = all_tg_pt;
860 pr_reg->pr_reg_aptpl = 1;
861 pr_reg->pr_reg_tg_pt_lun = NULL;
862 pr_reg->pr_res_scope = 0;
863 pr_reg->pr_res_type = type;
864
865
866
867
868 if (isid != NULL) {
869 pr_reg->pr_reg_bin_isid = get_unaligned_be64(isid);
870 snprintf(pr_reg->pr_reg_isid, PR_REG_ISID_LEN, "%s", isid);
871 pr_reg->isid_present_at_reg = 1;
872 }
873
874
875
876 snprintf(pr_reg->pr_iport, PR_APTPL_MAX_IPORT_LEN, "%s", i_port);
877 snprintf(pr_reg->pr_tport, PR_APTPL_MAX_TPORT_LEN, "%s", t_port);
878 pr_reg->pr_reg_tpgt = tpgt;
879
880
881
882
883
884
885 pr_reg->pr_res_holder = res_holder;
886
887 list_add_tail(&pr_reg->pr_reg_aptpl_list, &pr_tmpl->aptpl_reg_list);
888 pr_debug("SPC-3 PR APTPL Successfully added registration%s from"
889 " metadata\n", (res_holder) ? "+reservation" : "");
890 return 0;
891}
892
893static void core_scsi3_aptpl_reserve(
894 struct se_device *dev,
895 struct se_portal_group *tpg,
896 struct se_node_acl *node_acl,
897 struct t10_pr_registration *pr_reg)
898{
899 char i_buf[PR_REG_ISID_ID_LEN];
900 int prf_isid;
901
902 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
903 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
904 PR_REG_ISID_ID_LEN);
905
906 spin_lock(&dev->dev_reservation_lock);
907 dev->dev_pr_res_holder = pr_reg;
908 spin_unlock(&dev->dev_reservation_lock);
909
910 pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created"
911 " new reservation holder TYPE: %s ALL_TG_PT: %d\n",
912 tpg->se_tpg_tfo->get_fabric_name(),
913 core_scsi3_pr_dump_type(pr_reg->pr_res_type),
914 (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
915 pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
916 tpg->se_tpg_tfo->get_fabric_name(), node_acl->initiatorname,
917 (prf_isid) ? &i_buf[0] : "");
918}
919
920static void __core_scsi3_add_registration(struct se_device *, struct se_node_acl *,
921 struct t10_pr_registration *, int, int);
922
923static int __core_scsi3_check_aptpl_registration(
924 struct se_device *dev,
925 struct se_portal_group *tpg,
926 struct se_lun *lun,
927 u32 target_lun,
928 struct se_node_acl *nacl,
929 struct se_dev_entry *deve)
930{
931 struct t10_pr_registration *pr_reg, *pr_reg_tmp;
932 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
933 unsigned char i_port[PR_APTPL_MAX_IPORT_LEN];
934 unsigned char t_port[PR_APTPL_MAX_TPORT_LEN];
935 u16 tpgt;
936
937 memset(i_port, 0, PR_APTPL_MAX_IPORT_LEN);
938 memset(t_port, 0, PR_APTPL_MAX_TPORT_LEN);
939
940
941
942 snprintf(i_port, PR_APTPL_MAX_IPORT_LEN, "%s", nacl->initiatorname);
943 snprintf(t_port, PR_APTPL_MAX_TPORT_LEN, "%s",
944 tpg->se_tpg_tfo->tpg_get_wwn(tpg));
945 tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg);
946
947
948
949
950
951
952 spin_lock(&pr_tmpl->aptpl_reg_lock);
953 list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
954 pr_reg_aptpl_list) {
955 if (!strcmp(pr_reg->pr_iport, i_port) &&
956 (pr_reg->pr_res_mapped_lun == deve->mapped_lun) &&
957 !(strcmp(pr_reg->pr_tport, t_port)) &&
958 (pr_reg->pr_reg_tpgt == tpgt) &&
959 (pr_reg->pr_aptpl_target_lun == target_lun)) {
960
961 pr_reg->pr_reg_nacl = nacl;
962 pr_reg->pr_reg_deve = deve;
963 pr_reg->pr_reg_tg_pt_lun = lun;
964
965 list_del(&pr_reg->pr_reg_aptpl_list);
966 spin_unlock(&pr_tmpl->aptpl_reg_lock);
967
968
969
970
971
972 __core_scsi3_add_registration(dev, nacl, pr_reg, 0, 0);
973
974
975
976
977 if (pr_reg->pr_res_holder)
978 core_scsi3_aptpl_reserve(dev, tpg,
979 nacl, pr_reg);
980
981
982
983
984 spin_lock(&pr_tmpl->aptpl_reg_lock);
985 pr_tmpl->pr_aptpl_active = 1;
986 }
987 }
988 spin_unlock(&pr_tmpl->aptpl_reg_lock);
989
990 return 0;
991}
992
993int core_scsi3_check_aptpl_registration(
994 struct se_device *dev,
995 struct se_portal_group *tpg,
996 struct se_lun *lun,
997 struct se_lun_acl *lun_acl)
998{
999 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
1000 struct se_node_acl *nacl = lun_acl->se_lun_nacl;
1001 struct se_dev_entry *deve = nacl->device_list[lun_acl->mapped_lun];
1002
1003 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1004 return 0;
1005
1006 return __core_scsi3_check_aptpl_registration(dev, tpg, lun,
1007 lun->unpacked_lun, nacl, deve);
1008}
1009
1010static void __core_scsi3_dump_registration(
1011 struct target_core_fabric_ops *tfo,
1012 struct se_device *dev,
1013 struct se_node_acl *nacl,
1014 struct t10_pr_registration *pr_reg,
1015 int register_type)
1016{
1017 struct se_portal_group *se_tpg = nacl->se_tpg;
1018 char i_buf[PR_REG_ISID_ID_LEN];
1019 int prf_isid;
1020
1021 memset(&i_buf[0], 0, PR_REG_ISID_ID_LEN);
1022 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1023 PR_REG_ISID_ID_LEN);
1024
1025 pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator"
1026 " Node: %s%s\n", tfo->get_fabric_name(), (register_type == 2) ?
1027 "_AND_MOVE" : (register_type == 1) ?
1028 "_AND_IGNORE_EXISTING_KEY" : "", nacl->initiatorname,
1029 (prf_isid) ? i_buf : "");
1030 pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n",
1031 tfo->get_fabric_name(), tfo->tpg_get_wwn(se_tpg),
1032 tfo->tpg_get_tag(se_tpg));
1033 pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
1034 " Port(s)\n", tfo->get_fabric_name(),
1035 (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
1036 dev->transport->name);
1037 pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
1038 " 0x%08x APTPL: %d\n", tfo->get_fabric_name(),
1039 pr_reg->pr_res_key, pr_reg->pr_res_generation,
1040 pr_reg->pr_reg_aptpl);
1041}
1042
1043
1044
1045
1046
1047static void __core_scsi3_add_registration(
1048 struct se_device *dev,
1049 struct se_node_acl *nacl,
1050 struct t10_pr_registration *pr_reg,
1051 int register_type,
1052 int register_move)
1053{
1054 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
1055 struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
1056 struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
1057 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068 pr_reg->pr_res_generation = (register_move) ?
1069 su_dev->t10_pr.pr_generation++ :
1070 core_scsi3_pr_generation(dev);
1071
1072 spin_lock(&pr_tmpl->registration_lock);
1073 list_add_tail(&pr_reg->pr_reg_list, &pr_tmpl->registration_list);
1074 pr_reg->pr_reg_deve->def_pr_registered = 1;
1075
1076 __core_scsi3_dump_registration(tfo, dev, nacl, pr_reg, register_type);
1077 spin_unlock(&pr_tmpl->registration_lock);
1078
1079
1080
1081 if (!pr_reg->pr_reg_all_tg_pt || register_move)
1082 return;
1083
1084
1085
1086
1087 list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
1088 &pr_reg->pr_reg_atp_list, pr_reg_atp_mem_list) {
1089 list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
1090
1091 pr_reg_tmp->pr_res_generation = core_scsi3_pr_generation(dev);
1092
1093 spin_lock(&pr_tmpl->registration_lock);
1094 list_add_tail(&pr_reg_tmp->pr_reg_list,
1095 &pr_tmpl->registration_list);
1096 pr_reg_tmp->pr_reg_deve->def_pr_registered = 1;
1097
1098 __core_scsi3_dump_registration(tfo, dev,
1099 pr_reg_tmp->pr_reg_nacl, pr_reg_tmp,
1100 register_type);
1101 spin_unlock(&pr_tmpl->registration_lock);
1102
1103
1104
1105
1106 core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
1107 }
1108}
1109
1110static int core_scsi3_alloc_registration(
1111 struct se_device *dev,
1112 struct se_node_acl *nacl,
1113 struct se_dev_entry *deve,
1114 unsigned char *isid,
1115 u64 sa_res_key,
1116 int all_tg_pt,
1117 int aptpl,
1118 int register_type,
1119 int register_move)
1120{
1121 struct t10_pr_registration *pr_reg;
1122
1123 pr_reg = __core_scsi3_alloc_registration(dev, nacl, deve, isid,
1124 sa_res_key, all_tg_pt, aptpl);
1125 if (!pr_reg)
1126 return -EPERM;
1127
1128 __core_scsi3_add_registration(dev, nacl, pr_reg,
1129 register_type, register_move);
1130 return 0;
1131}
1132
1133static struct t10_pr_registration *__core_scsi3_locate_pr_reg(
1134 struct se_device *dev,
1135 struct se_node_acl *nacl,
1136 unsigned char *isid)
1137{
1138 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
1139 struct t10_pr_registration *pr_reg, *pr_reg_tmp;
1140 struct se_portal_group *tpg;
1141
1142 spin_lock(&pr_tmpl->registration_lock);
1143 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
1144 &pr_tmpl->registration_list, pr_reg_list) {
1145
1146
1147
1148 if (pr_reg->pr_reg_nacl != nacl)
1149 continue;
1150
1151 tpg = pr_reg->pr_reg_nacl->se_tpg;
1152
1153
1154
1155
1156 if (!pr_reg->isid_present_at_reg) {
1157
1158
1159
1160
1161
1162 if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
1163 if (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids)
1164 continue;
1165 }
1166 atomic_inc(&pr_reg->pr_res_holders);
1167 smp_mb__after_atomic_inc();
1168 spin_unlock(&pr_tmpl->registration_lock);
1169 return pr_reg;
1170 }
1171
1172
1173
1174
1175
1176 if (!isid)
1177 continue;
1178 if (strcmp(isid, pr_reg->pr_reg_isid))
1179 continue;
1180
1181 atomic_inc(&pr_reg->pr_res_holders);
1182 smp_mb__after_atomic_inc();
1183 spin_unlock(&pr_tmpl->registration_lock);
1184 return pr_reg;
1185 }
1186 spin_unlock(&pr_tmpl->registration_lock);
1187
1188 return NULL;
1189}
1190
1191static struct t10_pr_registration *core_scsi3_locate_pr_reg(
1192 struct se_device *dev,
1193 struct se_node_acl *nacl,
1194 struct se_session *sess)
1195{
1196 struct se_portal_group *tpg = nacl->se_tpg;
1197 unsigned char buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
1198
1199 if (tpg->se_tpg_tfo->sess_get_initiator_sid != NULL) {
1200 memset(&buf[0], 0, PR_REG_ISID_LEN);
1201 tpg->se_tpg_tfo->sess_get_initiator_sid(sess, &buf[0],
1202 PR_REG_ISID_LEN);
1203 isid_ptr = &buf[0];
1204 }
1205
1206 return __core_scsi3_locate_pr_reg(dev, nacl, isid_ptr);
1207}
1208
1209static void core_scsi3_put_pr_reg(struct t10_pr_registration *pr_reg)
1210{
1211 atomic_dec(&pr_reg->pr_res_holders);
1212 smp_mb__after_atomic_dec();
1213}
1214
1215static int core_scsi3_check_implict_release(
1216 struct se_device *dev,
1217 struct t10_pr_registration *pr_reg)
1218{
1219 struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
1220 struct t10_pr_registration *pr_res_holder;
1221 int ret = 0;
1222
1223 spin_lock(&dev->dev_reservation_lock);
1224 pr_res_holder = dev->dev_pr_res_holder;
1225 if (!pr_res_holder) {
1226 spin_unlock(&dev->dev_reservation_lock);
1227 return ret;
1228 }
1229 if (pr_res_holder == pr_reg) {
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243 __core_scsi3_complete_pro_release(dev, nacl, pr_reg, 0);
1244 ret = 1;
1245
1246
1247
1248
1249
1250
1251 } else if (pr_reg->pr_reg_all_tg_pt &&
1252 (!strcmp(pr_res_holder->pr_reg_nacl->initiatorname,
1253 pr_reg->pr_reg_nacl->initiatorname)) &&
1254 (pr_res_holder->pr_res_key == pr_reg->pr_res_key)) {
1255 pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1"
1256 " UNREGISTER while existing reservation with matching"
1257 " key 0x%016Lx is present from another SCSI Initiator"
1258 " Port\n", pr_reg->pr_res_key);
1259 ret = -EPERM;
1260 }
1261 spin_unlock(&dev->dev_reservation_lock);
1262
1263 return ret;
1264}
1265
1266
1267
1268
1269static void __core_scsi3_free_registration(
1270 struct se_device *dev,
1271 struct t10_pr_registration *pr_reg,
1272 struct list_head *preempt_and_abort_list,
1273 int dec_holders)
1274{
1275 struct target_core_fabric_ops *tfo =
1276 pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1277 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
1278 char i_buf[PR_REG_ISID_ID_LEN];
1279 int prf_isid;
1280
1281 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1282 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1283 PR_REG_ISID_ID_LEN);
1284
1285 pr_reg->pr_reg_deve->def_pr_registered = 0;
1286 pr_reg->pr_reg_deve->pr_res_key = 0;
1287 list_del(&pr_reg->pr_reg_list);
1288
1289
1290
1291
1292 if (dec_holders)
1293 core_scsi3_put_pr_reg(pr_reg);
1294
1295
1296
1297
1298
1299
1300 while (atomic_read(&pr_reg->pr_res_holders) != 0) {
1301 spin_unlock(&pr_tmpl->registration_lock);
1302 pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n",
1303 tfo->get_fabric_name());
1304 cpu_relax();
1305 spin_lock(&pr_tmpl->registration_lock);
1306 }
1307
1308 pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator"
1309 " Node: %s%s\n", tfo->get_fabric_name(),
1310 pr_reg->pr_reg_nacl->initiatorname,
1311 (prf_isid) ? &i_buf[0] : "");
1312 pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
1313 " Port(s)\n", tfo->get_fabric_name(),
1314 (pr_reg->pr_reg_all_tg_pt) ? "ALL" : "SINGLE",
1315 dev->transport->name);
1316 pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
1317 " 0x%08x\n", tfo->get_fabric_name(), pr_reg->pr_res_key,
1318 pr_reg->pr_res_generation);
1319
1320 if (!preempt_and_abort_list) {
1321 pr_reg->pr_reg_deve = NULL;
1322 pr_reg->pr_reg_nacl = NULL;
1323 kfree(pr_reg->pr_aptpl_buf);
1324 kmem_cache_free(t10_pr_reg_cache, pr_reg);
1325 return;
1326 }
1327
1328
1329
1330
1331 list_add_tail(&pr_reg->pr_reg_abort_list, preempt_and_abort_list);
1332}
1333
1334void core_scsi3_free_pr_reg_from_nacl(
1335 struct se_device *dev,
1336 struct se_node_acl *nacl)
1337{
1338 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
1339 struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
1340
1341
1342
1343
1344 spin_lock(&dev->dev_reservation_lock);
1345 pr_res_holder = dev->dev_pr_res_holder;
1346 if ((pr_res_holder != NULL) &&
1347 (pr_res_holder->pr_reg_nacl == nacl))
1348 __core_scsi3_complete_pro_release(dev, nacl, pr_res_holder, 0);
1349 spin_unlock(&dev->dev_reservation_lock);
1350
1351
1352
1353 spin_lock(&pr_tmpl->registration_lock);
1354 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
1355 &pr_tmpl->registration_list, pr_reg_list) {
1356
1357 if (pr_reg->pr_reg_nacl != nacl)
1358 continue;
1359
1360 __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
1361 }
1362 spin_unlock(&pr_tmpl->registration_lock);
1363}
1364
1365void core_scsi3_free_all_registrations(
1366 struct se_device *dev)
1367{
1368 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
1369 struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_res_holder;
1370
1371 spin_lock(&dev->dev_reservation_lock);
1372 pr_res_holder = dev->dev_pr_res_holder;
1373 if (pr_res_holder != NULL) {
1374 struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
1375 __core_scsi3_complete_pro_release(dev, pr_res_nacl,
1376 pr_res_holder, 0);
1377 }
1378 spin_unlock(&dev->dev_reservation_lock);
1379
1380 spin_lock(&pr_tmpl->registration_lock);
1381 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
1382 &pr_tmpl->registration_list, pr_reg_list) {
1383
1384 __core_scsi3_free_registration(dev, pr_reg, NULL, 0);
1385 }
1386 spin_unlock(&pr_tmpl->registration_lock);
1387
1388 spin_lock(&pr_tmpl->aptpl_reg_lock);
1389 list_for_each_entry_safe(pr_reg, pr_reg_tmp, &pr_tmpl->aptpl_reg_list,
1390 pr_reg_aptpl_list) {
1391 list_del(&pr_reg->pr_reg_aptpl_list);
1392 kfree(pr_reg->pr_aptpl_buf);
1393 kmem_cache_free(t10_pr_reg_cache, pr_reg);
1394 }
1395 spin_unlock(&pr_tmpl->aptpl_reg_lock);
1396}
1397
1398static int core_scsi3_tpg_depend_item(struct se_portal_group *tpg)
1399{
1400 return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
1401 &tpg->tpg_group.cg_item);
1402}
1403
1404static void core_scsi3_tpg_undepend_item(struct se_portal_group *tpg)
1405{
1406 configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
1407 &tpg->tpg_group.cg_item);
1408
1409 atomic_dec(&tpg->tpg_pr_ref_count);
1410 smp_mb__after_atomic_dec();
1411}
1412
1413static int core_scsi3_nodeacl_depend_item(struct se_node_acl *nacl)
1414{
1415 struct se_portal_group *tpg = nacl->se_tpg;
1416
1417 if (nacl->dynamic_node_acl)
1418 return 0;
1419
1420 return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
1421 &nacl->acl_group.cg_item);
1422}
1423
1424static void core_scsi3_nodeacl_undepend_item(struct se_node_acl *nacl)
1425{
1426 struct se_portal_group *tpg = nacl->se_tpg;
1427
1428 if (nacl->dynamic_node_acl) {
1429 atomic_dec(&nacl->acl_pr_ref_count);
1430 smp_mb__after_atomic_dec();
1431 return;
1432 }
1433
1434 configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
1435 &nacl->acl_group.cg_item);
1436
1437 atomic_dec(&nacl->acl_pr_ref_count);
1438 smp_mb__after_atomic_dec();
1439}
1440
1441static int core_scsi3_lunacl_depend_item(struct se_dev_entry *se_deve)
1442{
1443 struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
1444 struct se_node_acl *nacl;
1445 struct se_portal_group *tpg;
1446
1447
1448
1449 if (!lun_acl)
1450 return 0;
1451
1452 nacl = lun_acl->se_lun_nacl;
1453 tpg = nacl->se_tpg;
1454
1455 return configfs_depend_item(tpg->se_tpg_tfo->tf_subsys,
1456 &lun_acl->se_lun_group.cg_item);
1457}
1458
1459static void core_scsi3_lunacl_undepend_item(struct se_dev_entry *se_deve)
1460{
1461 struct se_lun_acl *lun_acl = se_deve->se_lun_acl;
1462 struct se_node_acl *nacl;
1463 struct se_portal_group *tpg;
1464
1465
1466
1467 if (!lun_acl) {
1468 atomic_dec(&se_deve->pr_ref_count);
1469 smp_mb__after_atomic_dec();
1470 return;
1471 }
1472 nacl = lun_acl->se_lun_nacl;
1473 tpg = nacl->se_tpg;
1474
1475 configfs_undepend_item(tpg->se_tpg_tfo->tf_subsys,
1476 &lun_acl->se_lun_group.cg_item);
1477
1478 atomic_dec(&se_deve->pr_ref_count);
1479 smp_mb__after_atomic_dec();
1480}
1481
1482static int core_scsi3_decode_spec_i_port(
1483 struct se_cmd *cmd,
1484 struct se_portal_group *tpg,
1485 unsigned char *l_isid,
1486 u64 sa_res_key,
1487 int all_tg_pt,
1488 int aptpl)
1489{
1490 struct se_device *dev = cmd->se_dev;
1491 struct se_port *tmp_port;
1492 struct se_portal_group *dest_tpg = NULL, *tmp_tpg;
1493 struct se_session *se_sess = cmd->se_sess;
1494 struct se_node_acl *dest_node_acl = NULL;
1495 struct se_dev_entry *dest_se_deve = NULL, *local_se_deve;
1496 struct t10_pr_registration *dest_pr_reg, *local_pr_reg, *pr_reg_e;
1497 struct t10_pr_registration *pr_reg_tmp, *pr_reg_tmp_safe;
1498 LIST_HEAD(tid_dest_list);
1499 struct pr_transport_id_holder *tidh_new, *tidh, *tidh_tmp;
1500 struct target_core_fabric_ops *tmp_tf_ops;
1501 unsigned char *buf;
1502 unsigned char *ptr, *i_str = NULL, proto_ident, tmp_proto_ident;
1503 char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
1504 u32 tpdl, tid_len = 0;
1505 int ret, dest_local_nexus, prf_isid;
1506 u32 dest_rtpi = 0;
1507
1508 memset(dest_iport, 0, 64);
1509
1510 local_se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
1511
1512
1513
1514
1515
1516
1517 tidh_new = kzalloc(sizeof(struct pr_transport_id_holder), GFP_KERNEL);
1518 if (!tidh_new) {
1519 pr_err("Unable to allocate tidh_new\n");
1520 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1521 return -EINVAL;
1522 }
1523 INIT_LIST_HEAD(&tidh_new->dest_list);
1524 tidh_new->dest_tpg = tpg;
1525 tidh_new->dest_node_acl = se_sess->se_node_acl;
1526 tidh_new->dest_se_deve = local_se_deve;
1527
1528 local_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
1529 se_sess->se_node_acl, local_se_deve, l_isid,
1530 sa_res_key, all_tg_pt, aptpl);
1531 if (!local_pr_reg) {
1532 kfree(tidh_new);
1533 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1534 return -ENOMEM;
1535 }
1536 tidh_new->dest_pr_reg = local_pr_reg;
1537
1538
1539
1540
1541
1542 tidh_new->dest_local_nexus = 1;
1543 list_add_tail(&tidh_new->dest_list, &tid_dest_list);
1544
1545 if (cmd->data_length < 28) {
1546 pr_warn("SPC-PR: Received PR OUT parameter list"
1547 " length too small: %u\n", cmd->data_length);
1548 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1549 ret = -EINVAL;
1550 goto out;
1551 }
1552
1553 buf = transport_kmap_data_sg(cmd);
1554
1555
1556
1557
1558
1559 tpdl = (buf[24] & 0xff) << 24;
1560 tpdl |= (buf[25] & 0xff) << 16;
1561 tpdl |= (buf[26] & 0xff) << 8;
1562 tpdl |= buf[27] & 0xff;
1563
1564 if ((tpdl + 28) != cmd->data_length) {
1565 pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header"
1566 " does not equal CDB data_length: %u\n", tpdl,
1567 cmd->data_length);
1568 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1569 ret = -EINVAL;
1570 goto out;
1571 }
1572
1573
1574
1575
1576
1577 ptr = &buf[28];
1578
1579 while (tpdl > 0) {
1580 proto_ident = (ptr[0] & 0x0f);
1581 dest_tpg = NULL;
1582
1583 spin_lock(&dev->se_port_lock);
1584 list_for_each_entry(tmp_port, &dev->dev_sep_list, sep_list) {
1585 tmp_tpg = tmp_port->sep_tpg;
1586 if (!tmp_tpg)
1587 continue;
1588 tmp_tf_ops = tmp_tpg->se_tpg_tfo;
1589 if (!tmp_tf_ops)
1590 continue;
1591 if (!tmp_tf_ops->get_fabric_proto_ident ||
1592 !tmp_tf_ops->tpg_parse_pr_out_transport_id)
1593 continue;
1594
1595
1596
1597
1598 tmp_proto_ident = tmp_tf_ops->get_fabric_proto_ident(tmp_tpg);
1599 if (tmp_proto_ident != proto_ident)
1600 continue;
1601 dest_rtpi = tmp_port->sep_rtpi;
1602
1603 i_str = tmp_tf_ops->tpg_parse_pr_out_transport_id(
1604 tmp_tpg, (const char *)ptr, &tid_len,
1605 &iport_ptr);
1606 if (!i_str)
1607 continue;
1608
1609 atomic_inc(&tmp_tpg->tpg_pr_ref_count);
1610 smp_mb__after_atomic_inc();
1611 spin_unlock(&dev->se_port_lock);
1612
1613 ret = core_scsi3_tpg_depend_item(tmp_tpg);
1614 if (ret != 0) {
1615 pr_err(" core_scsi3_tpg_depend_item()"
1616 " for tmp_tpg\n");
1617 atomic_dec(&tmp_tpg->tpg_pr_ref_count);
1618 smp_mb__after_atomic_dec();
1619 cmd->scsi_sense_reason =
1620 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1621 ret = -EINVAL;
1622 goto out;
1623 }
1624
1625
1626
1627
1628
1629 spin_lock_irq(&tmp_tpg->acl_node_lock);
1630 dest_node_acl = __core_tpg_get_initiator_node_acl(
1631 tmp_tpg, i_str);
1632 if (dest_node_acl) {
1633 atomic_inc(&dest_node_acl->acl_pr_ref_count);
1634 smp_mb__after_atomic_inc();
1635 }
1636 spin_unlock_irq(&tmp_tpg->acl_node_lock);
1637
1638 if (!dest_node_acl) {
1639 core_scsi3_tpg_undepend_item(tmp_tpg);
1640 spin_lock(&dev->se_port_lock);
1641 continue;
1642 }
1643
1644 ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
1645 if (ret != 0) {
1646 pr_err("configfs_depend_item() failed"
1647 " for dest_node_acl->acl_group\n");
1648 atomic_dec(&dest_node_acl->acl_pr_ref_count);
1649 smp_mb__after_atomic_dec();
1650 core_scsi3_tpg_undepend_item(tmp_tpg);
1651 cmd->scsi_sense_reason =
1652 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1653 ret = -EINVAL;
1654 goto out;
1655 }
1656
1657 dest_tpg = tmp_tpg;
1658 pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:"
1659 " %s Port RTPI: %hu\n",
1660 dest_tpg->se_tpg_tfo->get_fabric_name(),
1661 dest_node_acl->initiatorname, dest_rtpi);
1662
1663 spin_lock(&dev->se_port_lock);
1664 break;
1665 }
1666 spin_unlock(&dev->se_port_lock);
1667
1668 if (!dest_tpg) {
1669 pr_err("SPC-3 PR SPEC_I_PT: Unable to locate"
1670 " dest_tpg\n");
1671 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1672 ret = -EINVAL;
1673 goto out;
1674 }
1675
1676 pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u"
1677 " tid_len: %d for %s + %s\n",
1678 dest_tpg->se_tpg_tfo->get_fabric_name(), cmd->data_length,
1679 tpdl, tid_len, i_str, iport_ptr);
1680
1681 if (tid_len > tpdl) {
1682 pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:"
1683 " %u for Transport ID: %s\n", tid_len, ptr);
1684 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1685 core_scsi3_tpg_undepend_item(dest_tpg);
1686 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1687 ret = -EINVAL;
1688 goto out;
1689 }
1690
1691
1692
1693
1694
1695 dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl,
1696 dest_rtpi);
1697 if (!dest_se_deve) {
1698 pr_err("Unable to locate %s dest_se_deve"
1699 " from destination RTPI: %hu\n",
1700 dest_tpg->se_tpg_tfo->get_fabric_name(),
1701 dest_rtpi);
1702
1703 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1704 core_scsi3_tpg_undepend_item(dest_tpg);
1705 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1706 ret = -EINVAL;
1707 goto out;
1708 }
1709
1710 ret = core_scsi3_lunacl_depend_item(dest_se_deve);
1711 if (ret < 0) {
1712 pr_err("core_scsi3_lunacl_depend_item()"
1713 " failed\n");
1714 atomic_dec(&dest_se_deve->pr_ref_count);
1715 smp_mb__after_atomic_dec();
1716 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1717 core_scsi3_tpg_undepend_item(dest_tpg);
1718 cmd->scsi_sense_reason =
1719 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1720 ret = -EINVAL;
1721 goto out;
1722 }
1723
1724 pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s"
1725 " dest_se_deve mapped_lun: %u\n",
1726 dest_tpg->se_tpg_tfo->get_fabric_name(),
1727 dest_node_acl->initiatorname, dest_se_deve->mapped_lun);
1728
1729
1730
1731
1732
1733 pr_reg_e = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
1734 iport_ptr);
1735 if (pr_reg_e) {
1736 core_scsi3_put_pr_reg(pr_reg_e);
1737 core_scsi3_lunacl_undepend_item(dest_se_deve);
1738 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1739 core_scsi3_tpg_undepend_item(dest_tpg);
1740 ptr += tid_len;
1741 tpdl -= tid_len;
1742 tid_len = 0;
1743 continue;
1744 }
1745
1746
1747
1748
1749
1750 tidh_new = kzalloc(sizeof(struct pr_transport_id_holder),
1751 GFP_KERNEL);
1752 if (!tidh_new) {
1753 pr_err("Unable to allocate tidh_new\n");
1754 core_scsi3_lunacl_undepend_item(dest_se_deve);
1755 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1756 core_scsi3_tpg_undepend_item(dest_tpg);
1757 cmd->scsi_sense_reason =
1758 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
1759 ret = -ENOMEM;
1760 goto out;
1761 }
1762 INIT_LIST_HEAD(&tidh_new->dest_list);
1763 tidh_new->dest_tpg = dest_tpg;
1764 tidh_new->dest_node_acl = dest_node_acl;
1765 tidh_new->dest_se_deve = dest_se_deve;
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783 dest_pr_reg = __core_scsi3_alloc_registration(cmd->se_dev,
1784 dest_node_acl, dest_se_deve, iport_ptr,
1785 sa_res_key, all_tg_pt, aptpl);
1786 if (!dest_pr_reg) {
1787 core_scsi3_lunacl_undepend_item(dest_se_deve);
1788 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1789 core_scsi3_tpg_undepend_item(dest_tpg);
1790 kfree(tidh_new);
1791 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
1792 ret = -EINVAL;
1793 goto out;
1794 }
1795 tidh_new->dest_pr_reg = dest_pr_reg;
1796 list_add_tail(&tidh_new->dest_list, &tid_dest_list);
1797
1798 ptr += tid_len;
1799 tpdl -= tid_len;
1800 tid_len = 0;
1801
1802 }
1803
1804 transport_kunmap_data_sg(cmd);
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819 list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
1820 dest_tpg = tidh->dest_tpg;
1821 dest_node_acl = tidh->dest_node_acl;
1822 dest_se_deve = tidh->dest_se_deve;
1823 dest_pr_reg = tidh->dest_pr_reg;
1824 dest_local_nexus = tidh->dest_local_nexus;
1825
1826 list_del(&tidh->dest_list);
1827 kfree(tidh);
1828
1829 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1830 prf_isid = core_pr_dump_initiator_port(dest_pr_reg, &i_buf[0],
1831 PR_REG_ISID_ID_LEN);
1832
1833 __core_scsi3_add_registration(cmd->se_dev, dest_node_acl,
1834 dest_pr_reg, 0, 0);
1835
1836 pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully"
1837 " registered Transport ID for Node: %s%s Mapped LUN:"
1838 " %u\n", dest_tpg->se_tpg_tfo->get_fabric_name(),
1839 dest_node_acl->initiatorname, (prf_isid) ?
1840 &i_buf[0] : "", dest_se_deve->mapped_lun);
1841
1842 if (dest_local_nexus)
1843 continue;
1844
1845 core_scsi3_lunacl_undepend_item(dest_se_deve);
1846 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1847 core_scsi3_tpg_undepend_item(dest_tpg);
1848 }
1849
1850 return 0;
1851out:
1852 transport_kunmap_data_sg(cmd);
1853
1854
1855
1856
1857 list_for_each_entry_safe(tidh, tidh_tmp, &tid_dest_list, dest_list) {
1858 dest_tpg = tidh->dest_tpg;
1859 dest_node_acl = tidh->dest_node_acl;
1860 dest_se_deve = tidh->dest_se_deve;
1861 dest_pr_reg = tidh->dest_pr_reg;
1862 dest_local_nexus = tidh->dest_local_nexus;
1863
1864 list_del(&tidh->dest_list);
1865 kfree(tidh);
1866
1867
1868
1869
1870 list_for_each_entry_safe(pr_reg_tmp, pr_reg_tmp_safe,
1871 &dest_pr_reg->pr_reg_atp_list,
1872 pr_reg_atp_mem_list) {
1873 list_del(&pr_reg_tmp->pr_reg_atp_mem_list);
1874 core_scsi3_lunacl_undepend_item(pr_reg_tmp->pr_reg_deve);
1875 kmem_cache_free(t10_pr_reg_cache, pr_reg_tmp);
1876 }
1877
1878 kfree(dest_pr_reg->pr_aptpl_buf);
1879 kmem_cache_free(t10_pr_reg_cache, dest_pr_reg);
1880
1881 if (dest_local_nexus)
1882 continue;
1883
1884 core_scsi3_lunacl_undepend_item(dest_se_deve);
1885 core_scsi3_nodeacl_undepend_item(dest_node_acl);
1886 core_scsi3_tpg_undepend_item(dest_tpg);
1887 }
1888 return ret;
1889}
1890
1891
1892
1893
1894static int __core_scsi3_update_aptpl_buf(
1895 struct se_device *dev,
1896 unsigned char *buf,
1897 u32 pr_aptpl_buf_len,
1898 int clear_aptpl_metadata)
1899{
1900 struct se_lun *lun;
1901 struct se_portal_group *tpg;
1902 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
1903 struct t10_pr_registration *pr_reg;
1904 unsigned char tmp[512], isid_buf[32];
1905 ssize_t len = 0;
1906 int reg_count = 0;
1907
1908 memset(buf, 0, pr_aptpl_buf_len);
1909
1910
1911
1912 if (clear_aptpl_metadata) {
1913 snprintf(buf, pr_aptpl_buf_len,
1914 "No Registrations or Reservations\n");
1915 return 0;
1916 }
1917
1918
1919
1920 spin_lock(&su_dev->t10_pr.registration_lock);
1921 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1922 pr_reg_list) {
1923
1924 tmp[0] = '\0';
1925 isid_buf[0] = '\0';
1926 tpg = pr_reg->pr_reg_nacl->se_tpg;
1927 lun = pr_reg->pr_reg_tg_pt_lun;
1928
1929
1930
1931
1932 if (pr_reg->isid_present_at_reg)
1933 snprintf(isid_buf, 32, "initiator_sid=%s\n",
1934 pr_reg->pr_reg_isid);
1935
1936
1937
1938
1939 if (dev->dev_pr_res_holder == pr_reg) {
1940 snprintf(tmp, 512, "PR_REG_START: %d"
1941 "\ninitiator_fabric=%s\n"
1942 "initiator_node=%s\n%s"
1943 "sa_res_key=%llu\n"
1944 "res_holder=1\nres_type=%02x\n"
1945 "res_scope=%02x\nres_all_tg_pt=%d\n"
1946 "mapped_lun=%u\n", reg_count,
1947 tpg->se_tpg_tfo->get_fabric_name(),
1948 pr_reg->pr_reg_nacl->initiatorname, isid_buf,
1949 pr_reg->pr_res_key, pr_reg->pr_res_type,
1950 pr_reg->pr_res_scope, pr_reg->pr_reg_all_tg_pt,
1951 pr_reg->pr_res_mapped_lun);
1952 } else {
1953 snprintf(tmp, 512, "PR_REG_START: %d\n"
1954 "initiator_fabric=%s\ninitiator_node=%s\n%s"
1955 "sa_res_key=%llu\nres_holder=0\n"
1956 "res_all_tg_pt=%d\nmapped_lun=%u\n",
1957 reg_count, tpg->se_tpg_tfo->get_fabric_name(),
1958 pr_reg->pr_reg_nacl->initiatorname, isid_buf,
1959 pr_reg->pr_res_key, pr_reg->pr_reg_all_tg_pt,
1960 pr_reg->pr_res_mapped_lun);
1961 }
1962
1963 if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
1964 pr_err("Unable to update renaming"
1965 " APTPL metadata\n");
1966 spin_unlock(&su_dev->t10_pr.registration_lock);
1967 return -EMSGSIZE;
1968 }
1969 len += sprintf(buf+len, "%s", tmp);
1970
1971
1972
1973
1974 snprintf(tmp, 512, "target_fabric=%s\ntarget_node=%s\n"
1975 "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:"
1976 " %d\n", tpg->se_tpg_tfo->get_fabric_name(),
1977 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
1978 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1979 lun->lun_sep->sep_rtpi, lun->unpacked_lun, reg_count);
1980
1981 if ((len + strlen(tmp) >= pr_aptpl_buf_len)) {
1982 pr_err("Unable to update renaming"
1983 " APTPL metadata\n");
1984 spin_unlock(&su_dev->t10_pr.registration_lock);
1985 return -EMSGSIZE;
1986 }
1987 len += sprintf(buf+len, "%s", tmp);
1988 reg_count++;
1989 }
1990 spin_unlock(&su_dev->t10_pr.registration_lock);
1991
1992 if (!reg_count)
1993 len += sprintf(buf+len, "No Registrations or Reservations");
1994
1995 return 0;
1996}
1997
1998static int core_scsi3_update_aptpl_buf(
1999 struct se_device *dev,
2000 unsigned char *buf,
2001 u32 pr_aptpl_buf_len,
2002 int clear_aptpl_metadata)
2003{
2004 int ret;
2005
2006 spin_lock(&dev->dev_reservation_lock);
2007 ret = __core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
2008 clear_aptpl_metadata);
2009 spin_unlock(&dev->dev_reservation_lock);
2010
2011 return ret;
2012}
2013
2014
2015
2016
2017static int __core_scsi3_write_aptpl_to_file(
2018 struct se_device *dev,
2019 unsigned char *buf,
2020 u32 pr_aptpl_buf_len)
2021{
2022 struct t10_wwn *wwn = &dev->se_sub_dev->t10_wwn;
2023 struct file *file;
2024 struct iovec iov[1];
2025 mm_segment_t old_fs;
2026 int flags = O_RDWR | O_CREAT | O_TRUNC;
2027 char path[512];
2028 int ret;
2029
2030 memset(iov, 0, sizeof(struct iovec));
2031 memset(path, 0, 512);
2032
2033 if (strlen(&wwn->unit_serial[0]) >= 512) {
2034 pr_err("WWN value for struct se_device does not fit"
2035 " into path buffer\n");
2036 return -EMSGSIZE;
2037 }
2038
2039 snprintf(path, 512, "/var/target/pr/aptpl_%s", &wwn->unit_serial[0]);
2040 file = filp_open(path, flags, 0600);
2041 if (IS_ERR(file) || !file || !file->f_dentry) {
2042 pr_err("filp_open(%s) for APTPL metadata"
2043 " failed\n", path);
2044 return IS_ERR(file) ? PTR_ERR(file) : -ENOENT;
2045 }
2046
2047 iov[0].iov_base = &buf[0];
2048 if (!pr_aptpl_buf_len)
2049 iov[0].iov_len = (strlen(&buf[0]) + 1);
2050 else
2051 iov[0].iov_len = pr_aptpl_buf_len;
2052
2053 old_fs = get_fs();
2054 set_fs(get_ds());
2055 ret = vfs_writev(file, &iov[0], 1, &file->f_pos);
2056 set_fs(old_fs);
2057
2058 if (ret < 0) {
2059 pr_debug("Error writing APTPL metadata file: %s\n", path);
2060 filp_close(file, NULL);
2061 return -EIO;
2062 }
2063 filp_close(file, NULL);
2064
2065 return 0;
2066}
2067
2068static int core_scsi3_update_and_write_aptpl(
2069 struct se_device *dev,
2070 unsigned char *in_buf,
2071 u32 in_pr_aptpl_buf_len)
2072{
2073 unsigned char null_buf[64], *buf;
2074 u32 pr_aptpl_buf_len;
2075 int ret, clear_aptpl_metadata = 0;
2076
2077
2078
2079 if (!in_buf) {
2080 memset(null_buf, 0, 64);
2081 buf = &null_buf[0];
2082
2083
2084
2085
2086 pr_aptpl_buf_len = 64;
2087 clear_aptpl_metadata = 1;
2088 } else {
2089 buf = in_buf;
2090 pr_aptpl_buf_len = in_pr_aptpl_buf_len;
2091 }
2092
2093 ret = core_scsi3_update_aptpl_buf(dev, buf, pr_aptpl_buf_len,
2094 clear_aptpl_metadata);
2095 if (ret != 0)
2096 return ret;
2097
2098
2099
2100
2101 ret = __core_scsi3_write_aptpl_to_file(dev, buf, 0);
2102 if (ret != 0)
2103 return ret;
2104
2105 return ret;
2106}
2107
2108static int core_scsi3_emulate_pro_register(
2109 struct se_cmd *cmd,
2110 u64 res_key,
2111 u64 sa_res_key,
2112 int aptpl,
2113 int all_tg_pt,
2114 int spec_i_pt,
2115 int ignore_key)
2116{
2117 struct se_session *se_sess = cmd->se_sess;
2118 struct se_device *dev = cmd->se_dev;
2119 struct se_dev_entry *se_deve;
2120 struct se_lun *se_lun = cmd->se_lun;
2121 struct se_portal_group *se_tpg;
2122 struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_reg_tmp, *pr_reg_e;
2123 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
2124
2125 unsigned char *pr_aptpl_buf = NULL;
2126 unsigned char isid_buf[PR_REG_ISID_LEN], *isid_ptr = NULL;
2127 int pr_holder = 0, ret = 0, type;
2128
2129 if (!se_sess || !se_lun) {
2130 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2131 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2132 return -EINVAL;
2133 }
2134 se_tpg = se_sess->se_tpg;
2135 se_deve = se_sess->se_node_acl->device_list[cmd->orig_fe_lun];
2136
2137 if (se_tpg->se_tpg_tfo->sess_get_initiator_sid) {
2138 memset(&isid_buf[0], 0, PR_REG_ISID_LEN);
2139 se_tpg->se_tpg_tfo->sess_get_initiator_sid(se_sess, &isid_buf[0],
2140 PR_REG_ISID_LEN);
2141 isid_ptr = &isid_buf[0];
2142 }
2143
2144
2145
2146 pr_reg_e = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
2147 if (!pr_reg_e) {
2148 if (res_key) {
2149 pr_warn("SPC-3 PR: Reservation Key non-zero"
2150 " for SA REGISTER, returning CONFLICT\n");
2151 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2152 return -EINVAL;
2153 }
2154
2155
2156
2157 if (!sa_res_key)
2158 return 0;
2159
2160 if (!spec_i_pt) {
2161
2162
2163
2164
2165
2166 ret = core_scsi3_alloc_registration(cmd->se_dev,
2167 se_sess->se_node_acl, se_deve, isid_ptr,
2168 sa_res_key, all_tg_pt, aptpl,
2169 ignore_key, 0);
2170 if (ret != 0) {
2171 pr_err("Unable to allocate"
2172 " struct t10_pr_registration\n");
2173 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
2174 return -EINVAL;
2175 }
2176 } else {
2177
2178
2179
2180
2181
2182
2183
2184
2185 ret = core_scsi3_decode_spec_i_port(cmd, se_tpg,
2186 isid_ptr, sa_res_key, all_tg_pt, aptpl);
2187 if (ret != 0)
2188 return ret;
2189 }
2190
2191
2192
2193 if (!aptpl) {
2194 pr_tmpl->pr_aptpl_active = 0;
2195 core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
2196 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
2197 " REGISTER\n");
2198 return 0;
2199 }
2200
2201
2202
2203
2204
2205 pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev,
2206 se_sess->se_node_acl, se_sess);
2207
2208 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
2209 &pr_reg->pr_aptpl_buf[0],
2210 pr_tmpl->pr_aptpl_buf_len);
2211 if (!ret) {
2212 pr_tmpl->pr_aptpl_active = 1;
2213 pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n");
2214 }
2215
2216 core_scsi3_put_pr_reg(pr_reg);
2217 return ret;
2218 } else {
2219
2220
2221
2222 pr_reg = pr_reg_e;
2223 type = pr_reg->pr_res_type;
2224
2225 if (!ignore_key) {
2226 if (res_key != pr_reg->pr_res_key) {
2227 pr_err("SPC-3 PR REGISTER: Received"
2228 " res_key: 0x%016Lx does not match"
2229 " existing SA REGISTER res_key:"
2230 " 0x%016Lx\n", res_key,
2231 pr_reg->pr_res_key);
2232 core_scsi3_put_pr_reg(pr_reg);
2233 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2234 return -EINVAL;
2235 }
2236 }
2237 if (spec_i_pt) {
2238 pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT"
2239 " set while sa_res_key=0\n");
2240 core_scsi3_put_pr_reg(pr_reg);
2241 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
2242 return -EINVAL;
2243 }
2244
2245
2246
2247
2248 if (pr_reg->pr_reg_all_tg_pt && !(all_tg_pt)) {
2249 pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1"
2250 " registration exists, but ALL_TG_PT=1 bit not"
2251 " present in received PROUT\n");
2252 core_scsi3_put_pr_reg(pr_reg);
2253 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
2254 return -EINVAL;
2255 }
2256
2257
2258
2259 if (aptpl) {
2260 pr_aptpl_buf = kzalloc(pr_tmpl->pr_aptpl_buf_len,
2261 GFP_KERNEL);
2262 if (!pr_aptpl_buf) {
2263 pr_err("Unable to allocate"
2264 " pr_aptpl_buf\n");
2265 core_scsi3_put_pr_reg(pr_reg);
2266 cmd->scsi_sense_reason =
2267 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2268 return -EINVAL;
2269 }
2270 }
2271
2272
2273
2274
2275
2276 if (!sa_res_key) {
2277 pr_holder = core_scsi3_check_implict_release(
2278 cmd->se_dev, pr_reg);
2279 if (pr_holder < 0) {
2280 kfree(pr_aptpl_buf);
2281 core_scsi3_put_pr_reg(pr_reg);
2282 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2283 return -EINVAL;
2284 }
2285
2286 spin_lock(&pr_tmpl->registration_lock);
2287
2288
2289
2290
2291 if (pr_reg->pr_reg_all_tg_pt) {
2292 list_for_each_entry_safe(pr_reg_p, pr_reg_tmp,
2293 &pr_tmpl->registration_list,
2294 pr_reg_list) {
2295
2296 if (!pr_reg_p->pr_reg_all_tg_pt)
2297 continue;
2298
2299 if (pr_reg_p->pr_res_key != res_key)
2300 continue;
2301
2302 if (pr_reg == pr_reg_p)
2303 continue;
2304
2305 if (strcmp(pr_reg->pr_reg_nacl->initiatorname,
2306 pr_reg_p->pr_reg_nacl->initiatorname))
2307 continue;
2308
2309 __core_scsi3_free_registration(dev,
2310 pr_reg_p, NULL, 0);
2311 }
2312 }
2313
2314
2315
2316 __core_scsi3_free_registration(cmd->se_dev, pr_reg,
2317 NULL, 1);
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329 if (pr_holder &&
2330 ((type == PR_TYPE_WRITE_EXCLUSIVE_REGONLY) ||
2331 (type == PR_TYPE_EXCLUSIVE_ACCESS_REGONLY))) {
2332 list_for_each_entry(pr_reg_p,
2333 &pr_tmpl->registration_list,
2334 pr_reg_list) {
2335
2336 core_scsi3_ua_allocate(
2337 pr_reg_p->pr_reg_nacl,
2338 pr_reg_p->pr_res_mapped_lun,
2339 0x2A,
2340 ASCQ_2AH_RESERVATIONS_RELEASED);
2341 }
2342 }
2343 spin_unlock(&pr_tmpl->registration_lock);
2344
2345 if (!aptpl) {
2346 pr_tmpl->pr_aptpl_active = 0;
2347 core_scsi3_update_and_write_aptpl(dev, NULL, 0);
2348 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
2349 " for UNREGISTER\n");
2350 return 0;
2351 }
2352
2353 ret = core_scsi3_update_and_write_aptpl(dev,
2354 &pr_aptpl_buf[0],
2355 pr_tmpl->pr_aptpl_buf_len);
2356 if (!ret) {
2357 pr_tmpl->pr_aptpl_active = 1;
2358 pr_debug("SPC-3 PR: Set APTPL Bit Activated"
2359 " for UNREGISTER\n");
2360 }
2361
2362 kfree(pr_aptpl_buf);
2363 return ret;
2364 } else {
2365
2366
2367
2368
2369
2370 pr_reg->pr_res_generation = core_scsi3_pr_generation(
2371 cmd->se_dev);
2372 pr_reg->pr_res_key = sa_res_key;
2373 pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
2374 " Key for %s to: 0x%016Lx PRgeneration:"
2375 " 0x%08x\n", cmd->se_tfo->get_fabric_name(),
2376 (ignore_key) ? "_AND_IGNORE_EXISTING_KEY" : "",
2377 pr_reg->pr_reg_nacl->initiatorname,
2378 pr_reg->pr_res_key, pr_reg->pr_res_generation);
2379
2380 if (!aptpl) {
2381 pr_tmpl->pr_aptpl_active = 0;
2382 core_scsi3_update_and_write_aptpl(dev, NULL, 0);
2383 core_scsi3_put_pr_reg(pr_reg);
2384 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
2385 " for REGISTER\n");
2386 return 0;
2387 }
2388
2389 ret = core_scsi3_update_and_write_aptpl(dev,
2390 &pr_aptpl_buf[0],
2391 pr_tmpl->pr_aptpl_buf_len);
2392 if (!ret) {
2393 pr_tmpl->pr_aptpl_active = 1;
2394 pr_debug("SPC-3 PR: Set APTPL Bit Activated"
2395 " for REGISTER\n");
2396 }
2397
2398 kfree(pr_aptpl_buf);
2399 core_scsi3_put_pr_reg(pr_reg);
2400 }
2401 }
2402 return 0;
2403}
2404
2405unsigned char *core_scsi3_pr_dump_type(int type)
2406{
2407 switch (type) {
2408 case PR_TYPE_WRITE_EXCLUSIVE:
2409 return "Write Exclusive Access";
2410 case PR_TYPE_EXCLUSIVE_ACCESS:
2411 return "Exclusive Access";
2412 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
2413 return "Write Exclusive Access, Registrants Only";
2414 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
2415 return "Exclusive Access, Registrants Only";
2416 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
2417 return "Write Exclusive Access, All Registrants";
2418 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
2419 return "Exclusive Access, All Registrants";
2420 default:
2421 break;
2422 }
2423
2424 return "Unknown SPC-3 PR Type";
2425}
2426
2427static int core_scsi3_pro_reserve(
2428 struct se_cmd *cmd,
2429 struct se_device *dev,
2430 int type,
2431 int scope,
2432 u64 res_key)
2433{
2434 struct se_session *se_sess = cmd->se_sess;
2435 struct se_lun *se_lun = cmd->se_lun;
2436 struct t10_pr_registration *pr_reg, *pr_res_holder;
2437 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
2438 char i_buf[PR_REG_ISID_ID_LEN];
2439 int ret, prf_isid;
2440
2441 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
2442
2443 if (!se_sess || !se_lun) {
2444 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2445 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2446 return -EINVAL;
2447 }
2448
2449
2450
2451 pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
2452 se_sess);
2453 if (!pr_reg) {
2454 pr_err("SPC-3 PR: Unable to locate"
2455 " PR_REGISTERED *pr_reg for RESERVE\n");
2456 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2457 return -EINVAL;
2458 }
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468 if (res_key != pr_reg->pr_res_key) {
2469 pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx"
2470 " does not match existing SA REGISTER res_key:"
2471 " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
2472 core_scsi3_put_pr_reg(pr_reg);
2473 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2474 return -EINVAL;
2475 }
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486 if (scope != PR_SCOPE_LU_SCOPE) {
2487 pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
2488 core_scsi3_put_pr_reg(pr_reg);
2489 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
2490 return -EINVAL;
2491 }
2492
2493
2494
2495
2496
2497 spin_lock(&dev->dev_reservation_lock);
2498 pr_res_holder = dev->dev_pr_res_holder;
2499 if (pr_res_holder) {
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510 if (pr_res_holder != pr_reg) {
2511 struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
2512 pr_err("SPC-3 PR: Attempted RESERVE from"
2513 " [%s]: %s while reservation already held by"
2514 " [%s]: %s, returning RESERVATION_CONFLICT\n",
2515 cmd->se_tfo->get_fabric_name(),
2516 se_sess->se_node_acl->initiatorname,
2517 pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
2518 pr_res_holder->pr_reg_nacl->initiatorname);
2519
2520 spin_unlock(&dev->dev_reservation_lock);
2521 core_scsi3_put_pr_reg(pr_reg);
2522 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2523 return -EINVAL;
2524 }
2525
2526
2527
2528
2529
2530
2531
2532 if ((pr_res_holder->pr_res_type != type) ||
2533 (pr_res_holder->pr_res_scope != scope)) {
2534 struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
2535 pr_err("SPC-3 PR: Attempted RESERVE from"
2536 " [%s]: %s trying to change TYPE and/or SCOPE,"
2537 " while reservation already held by [%s]: %s,"
2538 " returning RESERVATION_CONFLICT\n",
2539 cmd->se_tfo->get_fabric_name(),
2540 se_sess->se_node_acl->initiatorname,
2541 pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
2542 pr_res_holder->pr_reg_nacl->initiatorname);
2543
2544 spin_unlock(&dev->dev_reservation_lock);
2545 core_scsi3_put_pr_reg(pr_reg);
2546 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2547 return -EINVAL;
2548 }
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559 spin_unlock(&dev->dev_reservation_lock);
2560 core_scsi3_put_pr_reg(pr_reg);
2561 return 0;
2562 }
2563
2564
2565
2566
2567 pr_reg->pr_res_scope = scope;
2568 pr_reg->pr_res_type = type;
2569 pr_reg->pr_res_holder = 1;
2570 dev->dev_pr_res_holder = pr_reg;
2571 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
2572 PR_REG_ISID_ID_LEN);
2573
2574 pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new"
2575 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2576 cmd->se_tfo->get_fabric_name(), core_scsi3_pr_dump_type(type),
2577 (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
2578 pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
2579 cmd->se_tfo->get_fabric_name(),
2580 se_sess->se_node_acl->initiatorname,
2581 (prf_isid) ? &i_buf[0] : "");
2582 spin_unlock(&dev->dev_reservation_lock);
2583
2584 if (pr_tmpl->pr_aptpl_active) {
2585 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
2586 &pr_reg->pr_aptpl_buf[0],
2587 pr_tmpl->pr_aptpl_buf_len);
2588 if (!ret)
2589 pr_debug("SPC-3 PR: Updated APTPL metadata"
2590 " for RESERVE\n");
2591 }
2592
2593 core_scsi3_put_pr_reg(pr_reg);
2594 return 0;
2595}
2596
2597static int core_scsi3_emulate_pro_reserve(
2598 struct se_cmd *cmd,
2599 int type,
2600 int scope,
2601 u64 res_key)
2602{
2603 struct se_device *dev = cmd->se_dev;
2604 int ret = 0;
2605
2606 switch (type) {
2607 case PR_TYPE_WRITE_EXCLUSIVE:
2608 case PR_TYPE_EXCLUSIVE_ACCESS:
2609 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
2610 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
2611 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
2612 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
2613 ret = core_scsi3_pro_reserve(cmd, dev, type, scope, res_key);
2614 break;
2615 default:
2616 pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:"
2617 " 0x%02x\n", type);
2618 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
2619 return -EINVAL;
2620 }
2621
2622 return ret;
2623}
2624
2625
2626
2627
2628static void __core_scsi3_complete_pro_release(
2629 struct se_device *dev,
2630 struct se_node_acl *se_nacl,
2631 struct t10_pr_registration *pr_reg,
2632 int explict)
2633{
2634 struct target_core_fabric_ops *tfo = se_nacl->se_tpg->se_tpg_tfo;
2635 char i_buf[PR_REG_ISID_ID_LEN];
2636 int prf_isid;
2637
2638 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
2639 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
2640 PR_REG_ISID_ID_LEN);
2641
2642
2643
2644 dev->dev_pr_res_holder = NULL;
2645
2646 pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared"
2647 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2648 tfo->get_fabric_name(), (explict) ? "explict" : "implict",
2649 core_scsi3_pr_dump_type(pr_reg->pr_res_type),
2650 (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
2651 pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n",
2652 tfo->get_fabric_name(), se_nacl->initiatorname,
2653 (prf_isid) ? &i_buf[0] : "");
2654
2655
2656
2657 pr_reg->pr_res_holder = pr_reg->pr_res_type = pr_reg->pr_res_scope = 0;
2658}
2659
2660static int core_scsi3_emulate_pro_release(
2661 struct se_cmd *cmd,
2662 int type,
2663 int scope,
2664 u64 res_key)
2665{
2666 struct se_device *dev = cmd->se_dev;
2667 struct se_session *se_sess = cmd->se_sess;
2668 struct se_lun *se_lun = cmd->se_lun;
2669 struct t10_pr_registration *pr_reg, *pr_reg_p, *pr_res_holder;
2670 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
2671 int ret, all_reg = 0;
2672
2673 if (!se_sess || !se_lun) {
2674 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2675 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2676 return -EINVAL;
2677 }
2678
2679
2680
2681 pr_reg = core_scsi3_locate_pr_reg(dev, se_sess->se_node_acl, se_sess);
2682 if (!pr_reg) {
2683 pr_err("SPC-3 PR: Unable to locate"
2684 " PR_REGISTERED *pr_reg for RELEASE\n");
2685 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2686 return -EINVAL;
2687 }
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700 spin_lock(&dev->dev_reservation_lock);
2701 pr_res_holder = dev->dev_pr_res_holder;
2702 if (!pr_res_holder) {
2703
2704
2705
2706 spin_unlock(&dev->dev_reservation_lock);
2707 core_scsi3_put_pr_reg(pr_reg);
2708 return 0;
2709 }
2710 if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
2711 (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
2712 all_reg = 1;
2713
2714 if ((all_reg == 0) && (pr_res_holder != pr_reg)) {
2715
2716
2717
2718
2719
2720 spin_unlock(&dev->dev_reservation_lock);
2721 core_scsi3_put_pr_reg(pr_reg);
2722 return 0;
2723 }
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738 if (res_key != pr_reg->pr_res_key) {
2739 pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx"
2740 " does not match existing SA REGISTER res_key:"
2741 " 0x%016Lx\n", res_key, pr_reg->pr_res_key);
2742 spin_unlock(&dev->dev_reservation_lock);
2743 core_scsi3_put_pr_reg(pr_reg);
2744 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2745 return -EINVAL;
2746 }
2747
2748
2749
2750
2751
2752
2753 if ((pr_res_holder->pr_res_type != type) ||
2754 (pr_res_holder->pr_res_scope != scope)) {
2755 struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
2756 pr_err("SPC-3 PR RELEASE: Attempted to release"
2757 " reservation from [%s]: %s with different TYPE "
2758 "and/or SCOPE while reservation already held by"
2759 " [%s]: %s, returning RESERVATION_CONFLICT\n",
2760 cmd->se_tfo->get_fabric_name(),
2761 se_sess->se_node_acl->initiatorname,
2762 pr_res_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
2763 pr_res_holder->pr_reg_nacl->initiatorname);
2764
2765 spin_unlock(&dev->dev_reservation_lock);
2766 core_scsi3_put_pr_reg(pr_reg);
2767 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2768 return -EINVAL;
2769 }
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786 __core_scsi3_complete_pro_release(dev, se_sess->se_node_acl,
2787 pr_reg, 1);
2788
2789 spin_unlock(&dev->dev_reservation_lock);
2790
2791 if ((type != PR_TYPE_WRITE_EXCLUSIVE_REGONLY) &&
2792 (type != PR_TYPE_EXCLUSIVE_ACCESS_REGONLY) &&
2793 (type != PR_TYPE_WRITE_EXCLUSIVE_ALLREG) &&
2794 (type != PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
2795
2796
2797
2798
2799
2800 goto write_aptpl;
2801 }
2802
2803 spin_lock(&pr_tmpl->registration_lock);
2804 list_for_each_entry(pr_reg_p, &pr_tmpl->registration_list,
2805 pr_reg_list) {
2806
2807
2808
2809
2810 if (pr_reg_p == pr_reg)
2811 continue;
2812
2813 core_scsi3_ua_allocate(pr_reg_p->pr_reg_nacl,
2814 pr_reg_p->pr_res_mapped_lun,
2815 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED);
2816 }
2817 spin_unlock(&pr_tmpl->registration_lock);
2818
2819write_aptpl:
2820 if (pr_tmpl->pr_aptpl_active) {
2821 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
2822 &pr_reg->pr_aptpl_buf[0],
2823 pr_tmpl->pr_aptpl_buf_len);
2824 if (!ret)
2825 pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n");
2826 }
2827
2828 core_scsi3_put_pr_reg(pr_reg);
2829 return 0;
2830}
2831
2832static int core_scsi3_emulate_pro_clear(
2833 struct se_cmd *cmd,
2834 u64 res_key)
2835{
2836 struct se_device *dev = cmd->se_dev;
2837 struct se_node_acl *pr_reg_nacl;
2838 struct se_session *se_sess = cmd->se_sess;
2839 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
2840 struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
2841 u32 pr_res_mapped_lun = 0;
2842 int calling_it_nexus = 0;
2843
2844
2845
2846 pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev,
2847 se_sess->se_node_acl, se_sess);
2848 if (!pr_reg_n) {
2849 pr_err("SPC-3 PR: Unable to locate"
2850 " PR_REGISTERED *pr_reg for CLEAR\n");
2851 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
2852 return -EINVAL;
2853 }
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865 if (res_key != pr_reg_n->pr_res_key) {
2866 pr_err("SPC-3 PR REGISTER: Received"
2867 " res_key: 0x%016Lx does not match"
2868 " existing SA REGISTER res_key:"
2869 " 0x%016Lx\n", res_key, pr_reg_n->pr_res_key);
2870 core_scsi3_put_pr_reg(pr_reg_n);
2871 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
2872 return -EINVAL;
2873 }
2874
2875
2876
2877 spin_lock(&dev->dev_reservation_lock);
2878 pr_res_holder = dev->dev_pr_res_holder;
2879 if (pr_res_holder) {
2880 struct se_node_acl *pr_res_nacl = pr_res_holder->pr_reg_nacl;
2881 __core_scsi3_complete_pro_release(dev, pr_res_nacl,
2882 pr_res_holder, 0);
2883 }
2884 spin_unlock(&dev->dev_reservation_lock);
2885
2886
2887
2888 spin_lock(&pr_tmpl->registration_lock);
2889 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
2890 &pr_tmpl->registration_list, pr_reg_list) {
2891
2892 calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
2893 pr_reg_nacl = pr_reg->pr_reg_nacl;
2894 pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
2895 __core_scsi3_free_registration(dev, pr_reg, NULL,
2896 calling_it_nexus);
2897
2898
2899
2900
2901
2902
2903
2904 if (!calling_it_nexus)
2905 core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun,
2906 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED);
2907 }
2908 spin_unlock(&pr_tmpl->registration_lock);
2909
2910 pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n",
2911 cmd->se_tfo->get_fabric_name());
2912
2913 if (pr_tmpl->pr_aptpl_active) {
2914 core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
2915 pr_debug("SPC-3 PR: Updated APTPL metadata"
2916 " for CLEAR\n");
2917 }
2918
2919 core_scsi3_pr_generation(dev);
2920 return 0;
2921}
2922
2923
2924
2925
2926static void __core_scsi3_complete_pro_preempt(
2927 struct se_device *dev,
2928 struct t10_pr_registration *pr_reg,
2929 struct list_head *preempt_and_abort_list,
2930 int type,
2931 int scope,
2932 int abort)
2933{
2934 struct se_node_acl *nacl = pr_reg->pr_reg_nacl;
2935 struct target_core_fabric_ops *tfo = nacl->se_tpg->se_tpg_tfo;
2936 char i_buf[PR_REG_ISID_ID_LEN];
2937 int prf_isid;
2938
2939 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
2940 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
2941 PR_REG_ISID_ID_LEN);
2942
2943
2944
2945 if (dev->dev_pr_res_holder)
2946 __core_scsi3_complete_pro_release(dev, nacl,
2947 dev->dev_pr_res_holder, 0);
2948
2949 dev->dev_pr_res_holder = pr_reg;
2950 pr_reg->pr_res_holder = 1;
2951 pr_reg->pr_res_type = type;
2952 pr_reg->pr_res_scope = scope;
2953
2954 pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new"
2955 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2956 tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
2957 core_scsi3_pr_dump_type(type),
2958 (pr_reg->pr_reg_all_tg_pt) ? 1 : 0);
2959 pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n",
2960 tfo->get_fabric_name(), (abort) ? "_AND_ABORT" : "",
2961 nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
2962
2963
2964
2965
2966
2967 if (preempt_and_abort_list)
2968 list_add_tail(&pr_reg->pr_reg_abort_list,
2969 preempt_and_abort_list);
2970}
2971
2972static void core_scsi3_release_preempt_and_abort(
2973 struct list_head *preempt_and_abort_list,
2974 struct t10_pr_registration *pr_reg_holder)
2975{
2976 struct t10_pr_registration *pr_reg, *pr_reg_tmp;
2977
2978 list_for_each_entry_safe(pr_reg, pr_reg_tmp, preempt_and_abort_list,
2979 pr_reg_abort_list) {
2980
2981 list_del(&pr_reg->pr_reg_abort_list);
2982 if (pr_reg_holder == pr_reg)
2983 continue;
2984 if (pr_reg->pr_res_holder) {
2985 pr_warn("pr_reg->pr_res_holder still set\n");
2986 continue;
2987 }
2988
2989 pr_reg->pr_reg_deve = NULL;
2990 pr_reg->pr_reg_nacl = NULL;
2991 kfree(pr_reg->pr_aptpl_buf);
2992 kmem_cache_free(t10_pr_reg_cache, pr_reg);
2993 }
2994}
2995
2996static int core_scsi3_pro_preempt(
2997 struct se_cmd *cmd,
2998 int type,
2999 int scope,
3000 u64 res_key,
3001 u64 sa_res_key,
3002 int abort)
3003{
3004 struct se_device *dev = cmd->se_dev;
3005 struct se_node_acl *pr_reg_nacl;
3006 struct se_session *se_sess = cmd->se_sess;
3007 LIST_HEAD(preempt_and_abort_list);
3008 struct t10_pr_registration *pr_reg, *pr_reg_tmp, *pr_reg_n, *pr_res_holder;
3009 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
3010 u32 pr_res_mapped_lun = 0;
3011 int all_reg = 0, calling_it_nexus = 0, released_regs = 0;
3012 int prh_type = 0, prh_scope = 0, ret;
3013
3014 if (!se_sess) {
3015 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3016 return -EINVAL;
3017 }
3018
3019 pr_reg_n = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
3020 se_sess);
3021 if (!pr_reg_n) {
3022 pr_err("SPC-3 PR: Unable to locate"
3023 " PR_REGISTERED *pr_reg for PREEMPT%s\n",
3024 (abort) ? "_AND_ABORT" : "");
3025 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3026 return -EINVAL;
3027 }
3028 if (pr_reg_n->pr_res_key != res_key) {
3029 core_scsi3_put_pr_reg(pr_reg_n);
3030 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3031 return -EINVAL;
3032 }
3033 if (scope != PR_SCOPE_LU_SCOPE) {
3034 pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope);
3035 core_scsi3_put_pr_reg(pr_reg_n);
3036 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3037 return -EINVAL;
3038 }
3039
3040 spin_lock(&dev->dev_reservation_lock);
3041 pr_res_holder = dev->dev_pr_res_holder;
3042 if (pr_res_holder &&
3043 ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
3044 (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)))
3045 all_reg = 1;
3046
3047 if (!all_reg && !sa_res_key) {
3048 spin_unlock(&dev->dev_reservation_lock);
3049 core_scsi3_put_pr_reg(pr_reg_n);
3050 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3051 return -EINVAL;
3052 }
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062 if (!pr_res_holder || (pr_res_holder->pr_res_key != sa_res_key)) {
3063
3064
3065
3066
3067
3068
3069 spin_lock(&pr_tmpl->registration_lock);
3070 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
3071 &pr_tmpl->registration_list, pr_reg_list) {
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089 if (!all_reg) {
3090 if (pr_reg->pr_res_key != sa_res_key)
3091 continue;
3092
3093 calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
3094 pr_reg_nacl = pr_reg->pr_reg_nacl;
3095 pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
3096 __core_scsi3_free_registration(dev, pr_reg,
3097 (abort) ? &preempt_and_abort_list :
3098 NULL, calling_it_nexus);
3099 released_regs++;
3100 } else {
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114 if ((sa_res_key) &&
3115 (pr_reg->pr_res_key != sa_res_key))
3116 continue;
3117
3118 calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
3119 if (calling_it_nexus)
3120 continue;
3121
3122 pr_reg_nacl = pr_reg->pr_reg_nacl;
3123 pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
3124 __core_scsi3_free_registration(dev, pr_reg,
3125 (abort) ? &preempt_and_abort_list :
3126 NULL, 0);
3127 released_regs++;
3128 }
3129 if (!calling_it_nexus)
3130 core_scsi3_ua_allocate(pr_reg_nacl,
3131 pr_res_mapped_lun, 0x2A,
3132 ASCQ_2AH_REGISTRATIONS_PREEMPTED);
3133 }
3134 spin_unlock(&pr_tmpl->registration_lock);
3135
3136
3137
3138
3139
3140
3141
3142 if (!released_regs) {
3143 spin_unlock(&dev->dev_reservation_lock);
3144 core_scsi3_put_pr_reg(pr_reg_n);
3145 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3146 return -EINVAL;
3147 }
3148
3149
3150
3151
3152
3153 if (pr_res_holder && all_reg && !(sa_res_key)) {
3154 __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
3155 (abort) ? &preempt_and_abort_list : NULL,
3156 type, scope, abort);
3157
3158 if (abort)
3159 core_scsi3_release_preempt_and_abort(
3160 &preempt_and_abort_list, pr_reg_n);
3161 }
3162 spin_unlock(&dev->dev_reservation_lock);
3163
3164 if (pr_tmpl->pr_aptpl_active) {
3165 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
3166 &pr_reg_n->pr_aptpl_buf[0],
3167 pr_tmpl->pr_aptpl_buf_len);
3168 if (!ret)
3169 pr_debug("SPC-3 PR: Updated APTPL"
3170 " metadata for PREEMPT%s\n", (abort) ?
3171 "_AND_ABORT" : "");
3172 }
3173
3174 core_scsi3_put_pr_reg(pr_reg_n);
3175 core_scsi3_pr_generation(cmd->se_dev);
3176 return 0;
3177 }
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197 prh_type = pr_res_holder->pr_res_type;
3198 prh_scope = pr_res_holder->pr_res_scope;
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208 if (pr_reg_n != pr_res_holder)
3209 __core_scsi3_complete_pro_release(dev,
3210 pr_res_holder->pr_reg_nacl,
3211 dev->dev_pr_res_holder, 0);
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222 spin_lock(&pr_tmpl->registration_lock);
3223 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
3224 &pr_tmpl->registration_list, pr_reg_list) {
3225
3226 calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
3227 if (calling_it_nexus)
3228 continue;
3229
3230 if (pr_reg->pr_res_key != sa_res_key)
3231 continue;
3232
3233 pr_reg_nacl = pr_reg->pr_reg_nacl;
3234 pr_res_mapped_lun = pr_reg->pr_res_mapped_lun;
3235 __core_scsi3_free_registration(dev, pr_reg,
3236 (abort) ? &preempt_and_abort_list : NULL,
3237 calling_it_nexus);
3238
3239
3240
3241
3242
3243
3244 core_scsi3_ua_allocate(pr_reg_nacl, pr_res_mapped_lun, 0x2A,
3245 ASCQ_2AH_REGISTRATIONS_PREEMPTED);
3246 }
3247 spin_unlock(&pr_tmpl->registration_lock);
3248
3249
3250
3251
3252 __core_scsi3_complete_pro_preempt(dev, pr_reg_n,
3253 (abort) ? &preempt_and_abort_list : NULL,
3254 type, scope, abort);
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268 if ((prh_type != type) || (prh_scope != scope)) {
3269 spin_lock(&pr_tmpl->registration_lock);
3270 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
3271 &pr_tmpl->registration_list, pr_reg_list) {
3272
3273 calling_it_nexus = (pr_reg_n == pr_reg) ? 1 : 0;
3274 if (calling_it_nexus)
3275 continue;
3276
3277 core_scsi3_ua_allocate(pr_reg->pr_reg_nacl,
3278 pr_reg->pr_res_mapped_lun, 0x2A,
3279 ASCQ_2AH_RESERVATIONS_RELEASED);
3280 }
3281 spin_unlock(&pr_tmpl->registration_lock);
3282 }
3283 spin_unlock(&dev->dev_reservation_lock);
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294 if (abort) {
3295 core_tmr_lun_reset(dev, NULL, &preempt_and_abort_list, cmd);
3296 core_scsi3_release_preempt_and_abort(&preempt_and_abort_list,
3297 pr_reg_n);
3298 }
3299
3300 if (pr_tmpl->pr_aptpl_active) {
3301 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
3302 &pr_reg_n->pr_aptpl_buf[0],
3303 pr_tmpl->pr_aptpl_buf_len);
3304 if (!ret)
3305 pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT"
3306 "%s\n", (abort) ? "_AND_ABORT" : "");
3307 }
3308
3309 core_scsi3_put_pr_reg(pr_reg_n);
3310 core_scsi3_pr_generation(cmd->se_dev);
3311 return 0;
3312}
3313
3314static int core_scsi3_emulate_pro_preempt(
3315 struct se_cmd *cmd,
3316 int type,
3317 int scope,
3318 u64 res_key,
3319 u64 sa_res_key,
3320 int abort)
3321{
3322 int ret = 0;
3323
3324 switch (type) {
3325 case PR_TYPE_WRITE_EXCLUSIVE:
3326 case PR_TYPE_EXCLUSIVE_ACCESS:
3327 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
3328 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
3329 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
3330 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
3331 ret = core_scsi3_pro_preempt(cmd, type, scope,
3332 res_key, sa_res_key, abort);
3333 break;
3334 default:
3335 pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s"
3336 " Type: 0x%02x\n", (abort) ? "_AND_ABORT" : "", type);
3337 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
3338 return -EINVAL;
3339 }
3340
3341 return ret;
3342}
3343
3344
3345static int core_scsi3_emulate_pro_register_and_move(
3346 struct se_cmd *cmd,
3347 u64 res_key,
3348 u64 sa_res_key,
3349 int aptpl,
3350 int unreg)
3351{
3352 struct se_session *se_sess = cmd->se_sess;
3353 struct se_device *dev = cmd->se_dev;
3354 struct se_dev_entry *dest_se_deve = NULL;
3355 struct se_lun *se_lun = cmd->se_lun;
3356 struct se_node_acl *pr_res_nacl, *pr_reg_nacl, *dest_node_acl = NULL;
3357 struct se_port *se_port;
3358 struct se_portal_group *se_tpg, *dest_se_tpg = NULL;
3359 struct target_core_fabric_ops *dest_tf_ops = NULL, *tf_ops;
3360 struct t10_pr_registration *pr_reg, *pr_res_holder, *dest_pr_reg;
3361 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
3362 unsigned char *buf;
3363 unsigned char *initiator_str;
3364 char *iport_ptr = NULL, dest_iport[64], i_buf[PR_REG_ISID_ID_LEN];
3365 u32 tid_len, tmp_tid_len;
3366 int new_reg = 0, type, scope, ret, matching_iname, prf_isid;
3367 unsigned short rtpi;
3368 unsigned char proto_ident;
3369
3370 if (!se_sess || !se_lun) {
3371 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
3372 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3373 return -EINVAL;
3374 }
3375 memset(dest_iport, 0, 64);
3376 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
3377 se_tpg = se_sess->se_tpg;
3378 tf_ops = se_tpg->se_tpg_tfo;
3379
3380
3381
3382
3383
3384
3385 pr_reg = core_scsi3_locate_pr_reg(cmd->se_dev, se_sess->se_node_acl,
3386 se_sess);
3387 if (!pr_reg) {
3388 pr_err("SPC-3 PR: Unable to locate PR_REGISTERED"
3389 " *pr_reg for REGISTER_AND_MOVE\n");
3390 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3391 return -EINVAL;
3392 }
3393
3394
3395
3396
3397 if (res_key != pr_reg->pr_res_key) {
3398 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received"
3399 " res_key: 0x%016Lx does not match existing SA REGISTER"
3400 " res_key: 0x%016Lx\n", res_key, pr_reg->pr_res_key);
3401 core_scsi3_put_pr_reg(pr_reg);
3402 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3403 return -EINVAL;
3404 }
3405
3406
3407
3408 if (!sa_res_key) {
3409 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero"
3410 " sa_res_key\n");
3411 core_scsi3_put_pr_reg(pr_reg);
3412 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3413 return -EINVAL;
3414 }
3415
3416
3417
3418
3419
3420
3421 buf = transport_kmap_data_sg(cmd);
3422 rtpi = (buf[18] & 0xff) << 8;
3423 rtpi |= buf[19] & 0xff;
3424 tid_len = (buf[20] & 0xff) << 24;
3425 tid_len |= (buf[21] & 0xff) << 16;
3426 tid_len |= (buf[22] & 0xff) << 8;
3427 tid_len |= buf[23] & 0xff;
3428 transport_kunmap_data_sg(cmd);
3429 buf = NULL;
3430
3431 if ((tid_len + 24) != cmd->data_length) {
3432 pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header"
3433 " does not equal CDB data_length: %u\n", tid_len,
3434 cmd->data_length);
3435 core_scsi3_put_pr_reg(pr_reg);
3436 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3437 return -EINVAL;
3438 }
3439
3440 spin_lock(&dev->se_port_lock);
3441 list_for_each_entry(se_port, &dev->dev_sep_list, sep_list) {
3442 if (se_port->sep_rtpi != rtpi)
3443 continue;
3444 dest_se_tpg = se_port->sep_tpg;
3445 if (!dest_se_tpg)
3446 continue;
3447 dest_tf_ops = dest_se_tpg->se_tpg_tfo;
3448 if (!dest_tf_ops)
3449 continue;
3450
3451 atomic_inc(&dest_se_tpg->tpg_pr_ref_count);
3452 smp_mb__after_atomic_inc();
3453 spin_unlock(&dev->se_port_lock);
3454
3455 ret = core_scsi3_tpg_depend_item(dest_se_tpg);
3456 if (ret != 0) {
3457 pr_err("core_scsi3_tpg_depend_item() failed"
3458 " for dest_se_tpg\n");
3459 atomic_dec(&dest_se_tpg->tpg_pr_ref_count);
3460 smp_mb__after_atomic_dec();
3461 core_scsi3_put_pr_reg(pr_reg);
3462 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3463 return -EINVAL;
3464 }
3465
3466 spin_lock(&dev->se_port_lock);
3467 break;
3468 }
3469 spin_unlock(&dev->se_port_lock);
3470
3471 if (!dest_se_tpg || !dest_tf_ops) {
3472 pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
3473 " fabric ops from Relative Target Port Identifier:"
3474 " %hu\n", rtpi);
3475 core_scsi3_put_pr_reg(pr_reg);
3476 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3477 return -EINVAL;
3478 }
3479
3480 buf = transport_kmap_data_sg(cmd);
3481 proto_ident = (buf[24] & 0x0f);
3482
3483 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
3484 " 0x%02x\n", proto_ident);
3485
3486 if (proto_ident != dest_tf_ops->get_fabric_proto_ident(dest_se_tpg)) {
3487 pr_err("SPC-3 PR REGISTER_AND_MOVE: Received"
3488 " proto_ident: 0x%02x does not match ident: 0x%02x"
3489 " from fabric: %s\n", proto_ident,
3490 dest_tf_ops->get_fabric_proto_ident(dest_se_tpg),
3491 dest_tf_ops->get_fabric_name());
3492 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3493 ret = -EINVAL;
3494 goto out;
3495 }
3496 if (dest_tf_ops->tpg_parse_pr_out_transport_id == NULL) {
3497 pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
3498 " containg a valid tpg_parse_pr_out_transport_id"
3499 " function pointer\n");
3500 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3501 ret = -EINVAL;
3502 goto out;
3503 }
3504 initiator_str = dest_tf_ops->tpg_parse_pr_out_transport_id(dest_se_tpg,
3505 (const char *)&buf[24], &tmp_tid_len, &iport_ptr);
3506 if (!initiator_str) {
3507 pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
3508 " initiator_str from Transport ID\n");
3509 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3510 ret = -EINVAL;
3511 goto out;
3512 }
3513
3514 transport_kunmap_data_sg(cmd);
3515 buf = NULL;
3516
3517 pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s"
3518 " %s\n", dest_tf_ops->get_fabric_name(), (iport_ptr != NULL) ?
3519 "port" : "device", initiator_str, (iport_ptr != NULL) ?
3520 iport_ptr : "");
3521
3522
3523
3524
3525
3526
3527
3528
3529 pr_reg_nacl = pr_reg->pr_reg_nacl;
3530 matching_iname = (!strcmp(initiator_str,
3531 pr_reg_nacl->initiatorname)) ? 1 : 0;
3532 if (!matching_iname)
3533 goto after_iport_check;
3534
3535 if (!iport_ptr || !pr_reg->isid_present_at_reg) {
3536 pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s"
3537 " matches: %s on received I_T Nexus\n", initiator_str,
3538 pr_reg_nacl->initiatorname);
3539 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3540 ret = -EINVAL;
3541 goto out;
3542 }
3543 if (!strcmp(iport_ptr, pr_reg->pr_reg_isid)) {
3544 pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s"
3545 " matches: %s %s on received I_T Nexus\n",
3546 initiator_str, iport_ptr, pr_reg_nacl->initiatorname,
3547 pr_reg->pr_reg_isid);
3548 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3549 ret = -EINVAL;
3550 goto out;
3551 }
3552after_iport_check:
3553
3554
3555
3556 spin_lock_irq(&dest_se_tpg->acl_node_lock);
3557 dest_node_acl = __core_tpg_get_initiator_node_acl(dest_se_tpg,
3558 initiator_str);
3559 if (dest_node_acl) {
3560 atomic_inc(&dest_node_acl->acl_pr_ref_count);
3561 smp_mb__after_atomic_inc();
3562 }
3563 spin_unlock_irq(&dest_se_tpg->acl_node_lock);
3564
3565 if (!dest_node_acl) {
3566 pr_err("Unable to locate %s dest_node_acl for"
3567 " TransportID%s\n", dest_tf_ops->get_fabric_name(),
3568 initiator_str);
3569 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3570 ret = -EINVAL;
3571 goto out;
3572 }
3573 ret = core_scsi3_nodeacl_depend_item(dest_node_acl);
3574 if (ret != 0) {
3575 pr_err("core_scsi3_nodeacl_depend_item() for"
3576 " dest_node_acl\n");
3577 atomic_dec(&dest_node_acl->acl_pr_ref_count);
3578 smp_mb__after_atomic_dec();
3579 dest_node_acl = NULL;
3580 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3581 ret = -EINVAL;
3582 goto out;
3583 }
3584
3585 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:"
3586 " %s from TransportID\n", dest_tf_ops->get_fabric_name(),
3587 dest_node_acl->initiatorname);
3588
3589
3590
3591
3592
3593 dest_se_deve = core_get_se_deve_from_rtpi(dest_node_acl, rtpi);
3594 if (!dest_se_deve) {
3595 pr_err("Unable to locate %s dest_se_deve from RTPI:"
3596 " %hu\n", dest_tf_ops->get_fabric_name(), rtpi);
3597 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3598 ret = -EINVAL;
3599 goto out;
3600 }
3601
3602 ret = core_scsi3_lunacl_depend_item(dest_se_deve);
3603 if (ret < 0) {
3604 pr_err("core_scsi3_lunacl_depend_item() failed\n");
3605 atomic_dec(&dest_se_deve->pr_ref_count);
3606 smp_mb__after_atomic_dec();
3607 dest_se_deve = NULL;
3608 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3609 ret = -EINVAL;
3610 goto out;
3611 }
3612
3613 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN"
3614 " ACL for dest_se_deve->mapped_lun: %u\n",
3615 dest_tf_ops->get_fabric_name(), dest_node_acl->initiatorname,
3616 dest_se_deve->mapped_lun);
3617
3618
3619
3620
3621
3622 spin_lock(&dev->dev_reservation_lock);
3623 pr_res_holder = dev->dev_pr_res_holder;
3624 if (!pr_res_holder) {
3625 pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation"
3626 " currently held\n");
3627 spin_unlock(&dev->dev_reservation_lock);
3628 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
3629 ret = -EINVAL;
3630 goto out;
3631 }
3632
3633
3634
3635
3636
3637
3638 if (pr_res_holder != pr_reg) {
3639 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
3640 " Nexus is not reservation holder\n");
3641 spin_unlock(&dev->dev_reservation_lock);
3642 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3643 ret = -EINVAL;
3644 goto out;
3645 }
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655 if ((pr_res_holder->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
3656 (pr_res_holder->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG)) {
3657 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move"
3658 " reservation for type: %s\n",
3659 core_scsi3_pr_dump_type(pr_res_holder->pr_res_type));
3660 spin_unlock(&dev->dev_reservation_lock);
3661 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3662 ret = -EINVAL;
3663 goto out;
3664 }
3665 pr_res_nacl = pr_res_holder->pr_reg_nacl;
3666
3667
3668
3669 type = pr_res_holder->pr_res_type;
3670 scope = pr_res_holder->pr_res_type;
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691 dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
3692 iport_ptr);
3693 if (!dest_pr_reg) {
3694 ret = core_scsi3_alloc_registration(cmd->se_dev,
3695 dest_node_acl, dest_se_deve, iport_ptr,
3696 sa_res_key, 0, aptpl, 2, 1);
3697 if (ret != 0) {
3698 spin_unlock(&dev->dev_reservation_lock);
3699 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3700 ret = -EINVAL;
3701 goto out;
3702 }
3703 dest_pr_reg = __core_scsi3_locate_pr_reg(dev, dest_node_acl,
3704 iport_ptr);
3705 new_reg = 1;
3706 }
3707
3708
3709
3710
3711 __core_scsi3_complete_pro_release(dev, pr_res_nacl,
3712 dev->dev_pr_res_holder, 0);
3713
3714
3715
3716
3717
3718 dev->dev_pr_res_holder = dest_pr_reg;
3719 dest_pr_reg->pr_res_holder = 1;
3720 dest_pr_reg->pr_res_type = type;
3721 pr_reg->pr_res_scope = scope;
3722 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
3723 PR_REG_ISID_ID_LEN);
3724
3725
3726
3727 if (!new_reg)
3728 dest_pr_reg->pr_res_generation = pr_tmpl->pr_generation++;
3729 spin_unlock(&dev->dev_reservation_lock);
3730
3731 pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE"
3732 " created new reservation holder TYPE: %s on object RTPI:"
3733 " %hu PRGeneration: 0x%08x\n", dest_tf_ops->get_fabric_name(),
3734 core_scsi3_pr_dump_type(type), rtpi,
3735 dest_pr_reg->pr_res_generation);
3736 pr_debug("SPC-3 PR Successfully moved reservation from"
3737 " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n",
3738 tf_ops->get_fabric_name(), pr_reg_nacl->initiatorname,
3739 (prf_isid) ? &i_buf[0] : "", dest_tf_ops->get_fabric_name(),
3740 dest_node_acl->initiatorname, (iport_ptr != NULL) ?
3741 iport_ptr : "");
3742
3743
3744
3745
3746 core_scsi3_lunacl_undepend_item(dest_se_deve);
3747 core_scsi3_nodeacl_undepend_item(dest_node_acl);
3748 core_scsi3_tpg_undepend_item(dest_se_tpg);
3749
3750
3751
3752
3753 if (unreg) {
3754 spin_lock(&pr_tmpl->registration_lock);
3755 __core_scsi3_free_registration(dev, pr_reg, NULL, 1);
3756 spin_unlock(&pr_tmpl->registration_lock);
3757 } else
3758 core_scsi3_put_pr_reg(pr_reg);
3759
3760
3761
3762
3763
3764 if (!aptpl) {
3765 pr_tmpl->pr_aptpl_active = 0;
3766 core_scsi3_update_and_write_aptpl(cmd->se_dev, NULL, 0);
3767 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
3768 " REGISTER_AND_MOVE\n");
3769 } else {
3770 pr_tmpl->pr_aptpl_active = 1;
3771 ret = core_scsi3_update_and_write_aptpl(cmd->se_dev,
3772 &dest_pr_reg->pr_aptpl_buf[0],
3773 pr_tmpl->pr_aptpl_buf_len);
3774 if (!ret)
3775 pr_debug("SPC-3 PR: Set APTPL Bit Activated for"
3776 " REGISTER_AND_MOVE\n");
3777 }
3778
3779 transport_kunmap_data_sg(cmd);
3780
3781 core_scsi3_put_pr_reg(dest_pr_reg);
3782 return 0;
3783out:
3784 if (buf)
3785 transport_kunmap_data_sg(cmd);
3786 if (dest_se_deve)
3787 core_scsi3_lunacl_undepend_item(dest_se_deve);
3788 if (dest_node_acl)
3789 core_scsi3_nodeacl_undepend_item(dest_node_acl);
3790 core_scsi3_tpg_undepend_item(dest_se_tpg);
3791 core_scsi3_put_pr_reg(pr_reg);
3792 return ret;
3793}
3794
3795static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb)
3796{
3797 unsigned int __v1, __v2;
3798
3799 __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3];
3800 __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7];
3801
3802 return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32;
3803}
3804
3805
3806
3807
3808int target_scsi3_emulate_pr_out(struct se_cmd *cmd)
3809{
3810 unsigned char *cdb = &cmd->t_task_cdb[0];
3811 unsigned char *buf;
3812 u64 res_key, sa_res_key;
3813 int sa, scope, type, aptpl;
3814 int spec_i_pt = 0, all_tg_pt = 0, unreg = 0;
3815 int ret;
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826 if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
3827 pr_err("Received PERSISTENT_RESERVE CDB while legacy"
3828 " SPC-2 reservation is held, returning"
3829 " RESERVATION_CONFLICT\n");
3830 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
3831 ret = -EINVAL;
3832 goto out;
3833 }
3834
3835
3836
3837
3838
3839 if (!cmd->se_sess) {
3840 cmd->scsi_sense_reason = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE;
3841 ret = -EINVAL;
3842 goto out;
3843 }
3844
3845 if (cmd->data_length < 24) {
3846 pr_warn("SPC-PR: Received PR OUT parameter list"
3847 " length too small: %u\n", cmd->data_length);
3848 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3849 ret = -EINVAL;
3850 goto out;
3851 }
3852
3853
3854
3855 sa = (cdb[1] & 0x1f);
3856 scope = (cdb[2] & 0xf0);
3857 type = (cdb[2] & 0x0f);
3858
3859 buf = transport_kmap_data_sg(cmd);
3860
3861
3862
3863 res_key = core_scsi3_extract_reservation_key(&buf[0]);
3864 sa_res_key = core_scsi3_extract_reservation_key(&buf[8]);
3865
3866
3867
3868
3869 if (sa != PRO_REGISTER_AND_MOVE) {
3870 spec_i_pt = (buf[20] & 0x08);
3871 all_tg_pt = (buf[20] & 0x04);
3872 aptpl = (buf[20] & 0x01);
3873 } else {
3874 aptpl = (buf[17] & 0x01);
3875 unreg = (buf[17] & 0x02);
3876 }
3877 transport_kunmap_data_sg(cmd);
3878 buf = NULL;
3879
3880
3881
3882
3883 if (spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER)) {
3884 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3885 ret = -EINVAL;
3886 goto out;
3887 }
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898 if (!spec_i_pt && ((cdb[1] & 0x1f) != PRO_REGISTER_AND_MOVE) &&
3899 (cmd->data_length != 24)) {
3900 pr_warn("SPC-PR: Received PR OUT illegal parameter"
3901 " list length: %u\n", cmd->data_length);
3902 cmd->scsi_sense_reason = TCM_INVALID_PARAMETER_LIST;
3903 ret = -EINVAL;
3904 goto out;
3905 }
3906
3907
3908
3909
3910
3911 switch (sa) {
3912 case PRO_REGISTER:
3913 ret = core_scsi3_emulate_pro_register(cmd,
3914 res_key, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 0);
3915 break;
3916 case PRO_RESERVE:
3917 ret = core_scsi3_emulate_pro_reserve(cmd, type, scope, res_key);
3918 break;
3919 case PRO_RELEASE:
3920 ret = core_scsi3_emulate_pro_release(cmd, type, scope, res_key);
3921 break;
3922 case PRO_CLEAR:
3923 ret = core_scsi3_emulate_pro_clear(cmd, res_key);
3924 break;
3925 case PRO_PREEMPT:
3926 ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
3927 res_key, sa_res_key, 0);
3928 break;
3929 case PRO_PREEMPT_AND_ABORT:
3930 ret = core_scsi3_emulate_pro_preempt(cmd, type, scope,
3931 res_key, sa_res_key, 1);
3932 break;
3933 case PRO_REGISTER_AND_IGNORE_EXISTING_KEY:
3934 ret = core_scsi3_emulate_pro_register(cmd,
3935 0, sa_res_key, aptpl, all_tg_pt, spec_i_pt, 1);
3936 break;
3937 case PRO_REGISTER_AND_MOVE:
3938 ret = core_scsi3_emulate_pro_register_and_move(cmd, res_key,
3939 sa_res_key, aptpl, unreg);
3940 break;
3941 default:
3942 pr_err("Unknown PERSISTENT_RESERVE_OUT service"
3943 " action: 0x%02x\n", cdb[1] & 0x1f);
3944 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
3945 ret = -EINVAL;
3946 break;
3947 }
3948
3949out:
3950 if (!ret)
3951 target_complete_cmd(cmd, GOOD);
3952 return ret;
3953}
3954
3955
3956
3957
3958
3959
3960static int core_scsi3_pri_read_keys(struct se_cmd *cmd)
3961{
3962 struct se_device *se_dev = cmd->se_dev;
3963 struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
3964 struct t10_pr_registration *pr_reg;
3965 unsigned char *buf;
3966 u32 add_len = 0, off = 8;
3967
3968 if (cmd->data_length < 8) {
3969 pr_err("PRIN SA READ_KEYS SCSI Data Length: %u"
3970 " too small\n", cmd->data_length);
3971 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
3972 return -EINVAL;
3973 }
3974
3975 buf = transport_kmap_data_sg(cmd);
3976 buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
3977 buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
3978 buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
3979 buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
3980
3981 spin_lock(&su_dev->t10_pr.registration_lock);
3982 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
3983 pr_reg_list) {
3984
3985
3986
3987
3988 if ((add_len + 8) > (cmd->data_length - 8))
3989 break;
3990
3991 buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
3992 buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
3993 buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
3994 buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
3995 buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
3996 buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
3997 buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
3998 buf[off++] = (pr_reg->pr_res_key & 0xff);
3999
4000 add_len += 8;
4001 }
4002 spin_unlock(&su_dev->t10_pr.registration_lock);
4003
4004 buf[4] = ((add_len >> 24) & 0xff);
4005 buf[5] = ((add_len >> 16) & 0xff);
4006 buf[6] = ((add_len >> 8) & 0xff);
4007 buf[7] = (add_len & 0xff);
4008
4009 transport_kunmap_data_sg(cmd);
4010
4011 return 0;
4012}
4013
4014
4015
4016
4017
4018
4019static int core_scsi3_pri_read_reservation(struct se_cmd *cmd)
4020{
4021 struct se_device *se_dev = cmd->se_dev;
4022 struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
4023 struct t10_pr_registration *pr_reg;
4024 unsigned char *buf;
4025 u64 pr_res_key;
4026 u32 add_len = 16;
4027
4028 if (cmd->data_length < 8) {
4029 pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u"
4030 " too small\n", cmd->data_length);
4031 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
4032 return -EINVAL;
4033 }
4034
4035 buf = transport_kmap_data_sg(cmd);
4036 buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
4037 buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
4038 buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
4039 buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
4040
4041 spin_lock(&se_dev->dev_reservation_lock);
4042 pr_reg = se_dev->dev_pr_res_holder;
4043 if (pr_reg) {
4044
4045
4046
4047 buf[4] = ((add_len >> 24) & 0xff);
4048 buf[5] = ((add_len >> 16) & 0xff);
4049 buf[6] = ((add_len >> 8) & 0xff);
4050 buf[7] = (add_len & 0xff);
4051
4052 if (cmd->data_length < 22)
4053 goto err;
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071 if ((pr_reg->pr_res_type == PR_TYPE_WRITE_EXCLUSIVE_ALLREG) ||
4072 (pr_reg->pr_res_type == PR_TYPE_EXCLUSIVE_ACCESS_ALLREG))
4073 pr_res_key = 0;
4074 else
4075 pr_res_key = pr_reg->pr_res_key;
4076
4077 buf[8] = ((pr_res_key >> 56) & 0xff);
4078 buf[9] = ((pr_res_key >> 48) & 0xff);
4079 buf[10] = ((pr_res_key >> 40) & 0xff);
4080 buf[11] = ((pr_res_key >> 32) & 0xff);
4081 buf[12] = ((pr_res_key >> 24) & 0xff);
4082 buf[13] = ((pr_res_key >> 16) & 0xff);
4083 buf[14] = ((pr_res_key >> 8) & 0xff);
4084 buf[15] = (pr_res_key & 0xff);
4085
4086
4087
4088 buf[21] = (pr_reg->pr_res_scope & 0xf0) |
4089 (pr_reg->pr_res_type & 0x0f);
4090 }
4091
4092err:
4093 spin_unlock(&se_dev->dev_reservation_lock);
4094 transport_kunmap_data_sg(cmd);
4095
4096 return 0;
4097}
4098
4099
4100
4101
4102
4103
4104static int core_scsi3_pri_report_capabilities(struct se_cmd *cmd)
4105{
4106 struct se_device *dev = cmd->se_dev;
4107 struct t10_reservation *pr_tmpl = &dev->se_sub_dev->t10_pr;
4108 unsigned char *buf;
4109 u16 add_len = 8;
4110
4111 if (cmd->data_length < 6) {
4112 pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:"
4113 " %u too small\n", cmd->data_length);
4114 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
4115 return -EINVAL;
4116 }
4117
4118 buf = transport_kmap_data_sg(cmd);
4119
4120 buf[0] = ((add_len << 8) & 0xff);
4121 buf[1] = (add_len & 0xff);
4122 buf[2] |= 0x10;
4123 buf[2] |= 0x08;
4124 buf[2] |= 0x04;
4125 buf[2] |= 0x01;
4126
4127
4128
4129
4130 buf[3] |= 0x80;
4131
4132
4133
4134 buf[3] |= 0x10;
4135
4136
4137
4138 if (pr_tmpl->pr_aptpl_active)
4139 buf[3] |= 0x01;
4140
4141
4142
4143 buf[4] |= 0x80;
4144 buf[4] |= 0x40;
4145 buf[4] |= 0x20;
4146 buf[4] |= 0x08;
4147 buf[4] |= 0x02;
4148 buf[5] |= 0x01;
4149
4150 transport_kunmap_data_sg(cmd);
4151
4152 return 0;
4153}
4154
4155
4156
4157
4158
4159
4160static int core_scsi3_pri_read_full_status(struct se_cmd *cmd)
4161{
4162 struct se_device *se_dev = cmd->se_dev;
4163 struct se_node_acl *se_nacl;
4164 struct se_subsystem_dev *su_dev = se_dev->se_sub_dev;
4165 struct se_portal_group *se_tpg;
4166 struct t10_pr_registration *pr_reg, *pr_reg_tmp;
4167 struct t10_reservation *pr_tmpl = &se_dev->se_sub_dev->t10_pr;
4168 unsigned char *buf;
4169 u32 add_desc_len = 0, add_len = 0, desc_len, exp_desc_len;
4170 u32 off = 8;
4171 int format_code = 0;
4172
4173 if (cmd->data_length < 8) {
4174 pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
4175 " too small\n", cmd->data_length);
4176 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
4177 return -EINVAL;
4178 }
4179
4180 buf = transport_kmap_data_sg(cmd);
4181
4182 buf[0] = ((su_dev->t10_pr.pr_generation >> 24) & 0xff);
4183 buf[1] = ((su_dev->t10_pr.pr_generation >> 16) & 0xff);
4184 buf[2] = ((su_dev->t10_pr.pr_generation >> 8) & 0xff);
4185 buf[3] = (su_dev->t10_pr.pr_generation & 0xff);
4186
4187 spin_lock(&pr_tmpl->registration_lock);
4188 list_for_each_entry_safe(pr_reg, pr_reg_tmp,
4189 &pr_tmpl->registration_list, pr_reg_list) {
4190
4191 se_nacl = pr_reg->pr_reg_nacl;
4192 se_tpg = pr_reg->pr_reg_nacl->se_tpg;
4193 add_desc_len = 0;
4194
4195 atomic_inc(&pr_reg->pr_res_holders);
4196 smp_mb__after_atomic_inc();
4197 spin_unlock(&pr_tmpl->registration_lock);
4198
4199
4200
4201
4202 exp_desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id_len(
4203 se_tpg, se_nacl, pr_reg, &format_code);
4204
4205 if ((exp_desc_len + add_len) > cmd->data_length) {
4206 pr_warn("SPC-3 PRIN READ_FULL_STATUS ran"
4207 " out of buffer: %d\n", cmd->data_length);
4208 spin_lock(&pr_tmpl->registration_lock);
4209 atomic_dec(&pr_reg->pr_res_holders);
4210 smp_mb__after_atomic_dec();
4211 break;
4212 }
4213
4214
4215
4216 buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff);
4217 buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff);
4218 buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff);
4219 buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff);
4220 buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff);
4221 buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff);
4222 buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff);
4223 buf[off++] = (pr_reg->pr_res_key & 0xff);
4224 off += 4;
4225
4226
4227
4228
4229 if (pr_reg->pr_reg_all_tg_pt)
4230 buf[off] = 0x02;
4231
4232
4233
4234
4235
4236
4237
4238 if (pr_reg->pr_res_holder) {
4239 buf[off++] |= 0x01;
4240 buf[off++] = (pr_reg->pr_res_scope & 0xf0) |
4241 (pr_reg->pr_res_type & 0x0f);
4242 } else
4243 off += 2;
4244
4245 off += 4;
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256 if (!pr_reg->pr_reg_all_tg_pt) {
4257 struct se_port *port = pr_reg->pr_reg_tg_pt_lun->lun_sep;
4258
4259 buf[off++] = ((port->sep_rtpi >> 8) & 0xff);
4260 buf[off++] = (port->sep_rtpi & 0xff);
4261 } else
4262 off += 2;
4263
4264
4265
4266
4267 desc_len = se_tpg->se_tpg_tfo->tpg_get_pr_transport_id(se_tpg,
4268 se_nacl, pr_reg, &format_code, &buf[off+4]);
4269
4270 spin_lock(&pr_tmpl->registration_lock);
4271 atomic_dec(&pr_reg->pr_res_holders);
4272 smp_mb__after_atomic_dec();
4273
4274
4275
4276 buf[off++] = ((desc_len >> 24) & 0xff);
4277 buf[off++] = ((desc_len >> 16) & 0xff);
4278 buf[off++] = ((desc_len >> 8) & 0xff);
4279 buf[off++] = (desc_len & 0xff);
4280
4281
4282
4283
4284
4285
4286
4287 add_desc_len = (24 + desc_len);
4288
4289 off += desc_len;
4290 add_len += add_desc_len;
4291 }
4292 spin_unlock(&pr_tmpl->registration_lock);
4293
4294
4295
4296 buf[4] = ((add_len >> 24) & 0xff);
4297 buf[5] = ((add_len >> 16) & 0xff);
4298 buf[6] = ((add_len >> 8) & 0xff);
4299 buf[7] = (add_len & 0xff);
4300
4301 transport_kunmap_data_sg(cmd);
4302
4303 return 0;
4304}
4305
4306int target_scsi3_emulate_pr_in(struct se_cmd *cmd)
4307{
4308 int ret;
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319 if (cmd->se_dev->dev_flags & DF_SPC2_RESERVATIONS) {
4320 pr_err("Received PERSISTENT_RESERVE CDB while legacy"
4321 " SPC-2 reservation is held, returning"
4322 " RESERVATION_CONFLICT\n");
4323 cmd->scsi_sense_reason = TCM_RESERVATION_CONFLICT;
4324 return -EINVAL;
4325 }
4326
4327 switch (cmd->t_task_cdb[1] & 0x1f) {
4328 case PRI_READ_KEYS:
4329 ret = core_scsi3_pri_read_keys(cmd);
4330 break;
4331 case PRI_READ_RESERVATION:
4332 ret = core_scsi3_pri_read_reservation(cmd);
4333 break;
4334 case PRI_REPORT_CAPABILITIES:
4335 ret = core_scsi3_pri_report_capabilities(cmd);
4336 break;
4337 case PRI_READ_FULL_STATUS:
4338 ret = core_scsi3_pri_read_full_status(cmd);
4339 break;
4340 default:
4341 pr_err("Unknown PERSISTENT_RESERVE_IN service"
4342 " action: 0x%02x\n", cmd->t_task_cdb[1] & 0x1f);
4343 cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD;
4344 ret = -EINVAL;
4345 break;
4346 }
4347
4348 if (!ret)
4349 target_complete_cmd(cmd, GOOD);
4350 return ret;
4351}
4352
4353static int core_pt_reservation_check(struct se_cmd *cmd, u32 *pr_res_type)
4354{
4355 return 0;
4356}
4357
4358static int core_pt_seq_non_holder(
4359 struct se_cmd *cmd,
4360 unsigned char *cdb,
4361 u32 pr_reg_type)
4362{
4363 return 0;
4364}
4365
4366int core_setup_reservations(struct se_device *dev, int force_pt)
4367{
4368 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
4369 struct t10_reservation *rest = &su_dev->t10_pr;
4370
4371
4372
4373
4374
4375
4376 if (((dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) &&
4377 !(dev->se_sub_dev->se_dev_attrib.emulate_reservations)) || force_pt) {
4378 rest->res_type = SPC_PASSTHROUGH;
4379 rest->pr_ops.t10_reservation_check = &core_pt_reservation_check;
4380 rest->pr_ops.t10_seq_non_holder = &core_pt_seq_non_holder;
4381 pr_debug("%s: Using SPC_PASSTHROUGH, no reservation"
4382 " emulation\n", dev->transport->name);
4383 return 0;
4384 }
4385
4386
4387
4388
4389 if (dev->transport->get_device_rev(dev) >= SCSI_3) {
4390 rest->res_type = SPC3_PERSISTENT_RESERVATIONS;
4391 rest->pr_ops.t10_reservation_check = &core_scsi3_pr_reservation_check;
4392 rest->pr_ops.t10_seq_non_holder = &core_scsi3_pr_seq_non_holder;
4393 pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS"
4394 " emulation\n", dev->transport->name);
4395 } else {
4396 rest->res_type = SPC2_RESERVATIONS;
4397 rest->pr_ops.t10_reservation_check = &core_scsi2_reservation_check;
4398 rest->pr_ops.t10_seq_non_holder =
4399 &core_scsi2_reservation_seq_non_holder;
4400 pr_debug("%s: Using SPC2_RESERVATIONS emulation\n",
4401 dev->transport->name);
4402 }
4403
4404 return 0;
4405}
4406