1 /*******************************************************************************
2 * Filename: target_core_pr.c
4 * This file contains SPC-3 compliant persistent reservations and
5 * legacy SPC-2 reservations with compatible reservation handling (CRH=1)
7 * Copyright (c) 2009, 2010 Rising Tide Systems
8 * Copyright (c) 2009, 2010 Linux-iSCSI.org
10 * Nicholas A. Bellinger <nab@kernel.org>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 ******************************************************************************/
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>
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>
40 #include "target_core_internal.h"
41 #include "target_core_pr.h"
42 #include "target_core_ua.h"
45 * Used for Specify Initiator Ports Capable Bit (SPEC_I_PT)
47 struct pr_transport_id_holder
{
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
;
56 int core_pr_dump_initiator_port(
57 struct t10_pr_registration
*pr_reg
,
61 if (!pr_reg
->isid_present_at_reg
)
64 snprintf(buf
, size
, ",i,0x%s", &pr_reg
->pr_reg_isid
[0]);
68 static void __core_scsi3_complete_pro_release(struct se_device
*, struct se_node_acl
*,
69 struct t10_pr_registration
*, int);
71 static int core_scsi2_reservation_seq_non_holder(
88 static int core_scsi2_reservation_check(struct se_cmd
*cmd
, u32
*pr_reg_type
)
90 struct se_device
*dev
= cmd
->se_dev
;
91 struct se_session
*sess
= cmd
->se_sess
;
97 spin_lock(&dev
->dev_reservation_lock
);
98 if (!dev
->dev_reserved_node_acl
|| !sess
) {
99 spin_unlock(&dev
->dev_reservation_lock
);
102 if (dev
->dev_reserved_node_acl
!= sess
->se_node_acl
) {
103 spin_unlock(&dev
->dev_reservation_lock
);
106 if (!(dev
->dev_flags
& DF_SPC2_RESERVATIONS_WITH_ISID
)) {
107 spin_unlock(&dev
->dev_reservation_lock
);
110 ret
= (dev
->dev_res_bin_isid
== sess
->sess_bin_isid
) ? 0 : -EINVAL
;
111 spin_unlock(&dev
->dev_reservation_lock
);
116 static struct t10_pr_registration
*core_scsi3_locate_pr_reg(struct se_device
*,
117 struct se_node_acl
*, struct se_session
*);
118 static void core_scsi3_put_pr_reg(struct t10_pr_registration
*);
120 static int target_check_scsi2_reservation_conflict(struct se_cmd
*cmd
, int *ret
)
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
);
132 pr_reg
= core_scsi3_locate_pr_reg(cmd
->se_dev
, se_sess
->se_node_acl
,
136 * From spc4r17 5.7.3 Exceptions to SPC-2 RESERVE and RELEASE
139 * A RESERVE(6) or RESERVE(10) command shall complete with GOOD
140 * status, but no reservation shall be established and the
141 * persistent reservation shall not be changed, if the command
142 * is received from a) and b) below.
144 * A RELEASE(6) or RELEASE(10) command shall complete with GOOD
145 * status, but the persistent reservation shall not be released,
146 * if the command is received from a) and b)
148 * a) An I_T nexus that is a persistent reservation holder; or
149 * b) An I_T nexus that is registered if a registrants only or
150 * all registrants type persistent reservation is present.
152 * In all other cases, a RESERVE(6) command, RESERVE(10) command,
153 * RELEASE(6) command, or RELEASE(10) command shall be processed
154 * as defined in SPC-2.
156 if (pr_reg
->pr_res_holder
) {
157 core_scsi3_put_pr_reg(pr_reg
);
161 if ((pr_reg
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_REGONLY
) ||
162 (pr_reg
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
) ||
163 (pr_reg
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) ||
164 (pr_reg
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
)) {
165 core_scsi3_put_pr_reg(pr_reg
);
169 core_scsi3_put_pr_reg(pr_reg
);
173 * Following spc2r20 5.5.1 Reservations overview:
175 * If a logical unit has executed a PERSISTENT RESERVE OUT
176 * command with the REGISTER or the REGISTER AND IGNORE
177 * EXISTING KEY service action and is still registered by any
178 * initiator, all RESERVE commands and all RELEASE commands
179 * regardless of initiator shall conflict and shall terminate
180 * with a RESERVATION CONFLICT status.
182 spin_lock(&pr_tmpl
->registration_lock
);
183 conflict
= (list_empty(&pr_tmpl
->registration_list
)) ? 0 : 1;
184 spin_unlock(&pr_tmpl
->registration_lock
);
188 pr_err("Received legacy SPC-2 RESERVE/RELEASE"
189 " while active SPC-3 registrations exist,"
190 " returning RESERVATION_CONFLICT\n");
191 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
198 int target_scsi2_reservation_release(struct se_task
*task
)
200 struct se_cmd
*cmd
= task
->task_se_cmd
;
201 struct se_device
*dev
= cmd
->se_dev
;
202 struct se_session
*sess
= cmd
->se_sess
;
203 struct se_portal_group
*tpg
= sess
->se_tpg
;
208 if (target_check_scsi2_reservation_conflict(cmd
, &ret
))
212 spin_lock(&dev
->dev_reservation_lock
);
213 if (!dev
->dev_reserved_node_acl
|| !sess
)
216 if (dev
->dev_reserved_node_acl
!= sess
->se_node_acl
)
219 dev
->dev_reserved_node_acl
= NULL
;
220 dev
->dev_flags
&= ~DF_SPC2_RESERVATIONS
;
221 if (dev
->dev_flags
& DF_SPC2_RESERVATIONS_WITH_ISID
) {
222 dev
->dev_res_bin_isid
= 0;
223 dev
->dev_flags
&= ~DF_SPC2_RESERVATIONS_WITH_ISID
;
225 pr_debug("SCSI-2 Released reservation for %s LUN: %u ->"
226 " MAPPED LUN: %u for %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
227 cmd
->se_lun
->unpacked_lun
, cmd
->se_deve
->mapped_lun
,
228 sess
->se_node_acl
->initiatorname
);
231 spin_unlock(&dev
->dev_reservation_lock
);
234 task
->task_scsi_status
= GOOD
;
235 transport_complete_task(task
, 1);
240 int target_scsi2_reservation_reserve(struct se_task
*task
)
242 struct se_cmd
*cmd
= task
->task_se_cmd
;
243 struct se_device
*dev
= cmd
->se_dev
;
244 struct se_session
*sess
= cmd
->se_sess
;
245 struct se_portal_group
*tpg
= sess
->se_tpg
;
248 if ((cmd
->t_task_cdb
[1] & 0x01) &&
249 (cmd
->t_task_cdb
[1] & 0x02)) {
250 pr_err("LongIO and Obselete Bits set, returning"
251 " ILLEGAL_REQUEST\n");
252 cmd
->scsi_sense_reason
= TCM_UNSUPPORTED_SCSI_OPCODE
;
257 * This is currently the case for target_core_mod passthrough struct se_cmd
262 if (target_check_scsi2_reservation_conflict(cmd
, &ret
))
266 spin_lock(&dev
->dev_reservation_lock
);
267 if (dev
->dev_reserved_node_acl
&&
268 (dev
->dev_reserved_node_acl
!= sess
->se_node_acl
)) {
269 pr_err("SCSI-2 RESERVATION CONFLIFT for %s fabric\n",
270 tpg
->se_tpg_tfo
->get_fabric_name());
271 pr_err("Original reserver LUN: %u %s\n",
272 cmd
->se_lun
->unpacked_lun
,
273 dev
->dev_reserved_node_acl
->initiatorname
);
274 pr_err("Current attempt - LUN: %u -> MAPPED LUN: %u"
275 " from %s \n", cmd
->se_lun
->unpacked_lun
,
276 cmd
->se_deve
->mapped_lun
,
277 sess
->se_node_acl
->initiatorname
);
278 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
283 dev
->dev_reserved_node_acl
= sess
->se_node_acl
;
284 dev
->dev_flags
|= DF_SPC2_RESERVATIONS
;
285 if (sess
->sess_bin_isid
!= 0) {
286 dev
->dev_res_bin_isid
= sess
->sess_bin_isid
;
287 dev
->dev_flags
|= DF_SPC2_RESERVATIONS_WITH_ISID
;
289 pr_debug("SCSI-2 Reserved %s LUN: %u -> MAPPED LUN: %u"
290 " for %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
291 cmd
->se_lun
->unpacked_lun
, cmd
->se_deve
->mapped_lun
,
292 sess
->se_node_acl
->initiatorname
);
295 spin_unlock(&dev
->dev_reservation_lock
);
298 task
->task_scsi_status
= GOOD
;
299 transport_complete_task(task
, 1);
306 * Begin SPC-3/SPC-4 Persistent Reservations emulation support
308 * This function is called by those initiator ports who are *NOT*
309 * the active PR reservation holder when a reservation is present.
311 static int core_scsi3_pr_seq_non_holder(
316 struct se_dev_entry
*se_deve
;
317 struct se_session
*se_sess
= cmd
->se_sess
;
318 int other_cdb
= 0, ignore_reg
;
319 int registered_nexus
= 0, ret
= 1; /* Conflict by default */
320 int all_reg
= 0, reg_only
= 0; /* ALL_REG, REG_ONLY */
321 int we
= 0; /* Write Exclusive */
322 int legacy
= 0; /* Act like a legacy device and return
323 * RESERVATION CONFLICT on some CDBs */
325 * A legacy SPC-2 reservation is being held.
327 if (cmd
->se_dev
->dev_flags
& DF_SPC2_RESERVATIONS
)
328 return core_scsi2_reservation_seq_non_holder(cmd
,
331 se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
333 * Determine if the registration should be ignored due to
334 * non-matching ISIDs in core_scsi3_pr_reservation_check().
336 ignore_reg
= (pr_reg_type
& 0x80000000);
338 pr_reg_type
&= ~0x80000000;
340 switch (pr_reg_type
) {
341 case PR_TYPE_WRITE_EXCLUSIVE
:
343 case PR_TYPE_EXCLUSIVE_ACCESS
:
345 * Some commands are only allowed for the persistent reservation
348 if ((se_deve
->def_pr_registered
) && !(ignore_reg
))
349 registered_nexus
= 1;
351 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY
:
353 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
:
355 * Some commands are only allowed for registered I_T Nexuses.
358 if ((se_deve
->def_pr_registered
) && !(ignore_reg
))
359 registered_nexus
= 1;
361 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG
:
363 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
:
365 * Each registered I_T Nexus is a reservation holder.
368 if ((se_deve
->def_pr_registered
) && !(ignore_reg
))
369 registered_nexus
= 1;
375 * Referenced from spc4r17 table 45 for *NON* PR holder access
378 case SECURITY_PROTOCOL_IN
:
379 if (registered_nexus
)
387 case RECEIVE_DIAGNOSTIC
:
392 if (registered_nexus
) {
396 ret
= (we
) ? 0 : 1; /* Allowed Write Exclusive */
398 case PERSISTENT_RESERVE_OUT
:
400 * This follows PERSISTENT_RESERVE_OUT service actions that
401 * are allowed in the presence of various reservations.
402 * See spc4r17, table 46
404 switch (cdb
[1] & 0x1f) {
407 case PRO_PREEMPT_AND_ABORT
:
408 ret
= (registered_nexus
) ? 0 : 1;
411 case PRO_REGISTER_AND_IGNORE_EXISTING_KEY
:
414 case PRO_REGISTER_AND_MOVE
:
419 ret
= (registered_nexus
) ? 0 : 1;
422 pr_err("Unknown PERSISTENT_RESERVE_OUT service"
423 " action: 0x%02x\n", cdb
[1] & 0x1f);
429 /* Handled by CRH=1 in target_scsi2_reservation_release() */
434 /* Handled by CRH=1 in target_scsi2_reservation_reserve() */
437 case TEST_UNIT_READY
:
438 ret
= (legacy
) ? 1 : 0; /* Conflict for legacy */
441 switch (cdb
[1] & 0x1f) {
442 case MI_MANAGEMENT_PROTOCOL_IN
:
443 if (registered_nexus
) {
447 ret
= (we
) ? 0 : 1; /* Allowed Write Exclusive */
449 case MI_REPORT_SUPPORTED_OPERATION_CODES
:
450 case MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS
:
455 if (registered_nexus
) {
459 ret
= (we
) ? 0 : 1; /* Allowed Write Exclusive */
461 case MI_REPORT_ALIASES
:
462 case MI_REPORT_IDENTIFYING_INFORMATION
:
463 case MI_REPORT_PRIORITY
:
464 case MI_REPORT_TARGET_PGS
:
465 case MI_REPORT_TIMESTAMP
:
466 ret
= 0; /* Allowed */
469 pr_err("Unknown MI Service Action: 0x%02x\n",
474 case ACCESS_CONTROL_IN
:
475 case ACCESS_CONTROL_OUT
:
478 case READ_MEDIA_SERIAL_NUMBER
:
481 case PERSISTENT_RESERVE_IN
:
482 ret
= 0; /*/ Allowed CDBs */
489 * Case where the CDB is explicitly allowed in the above switch
492 if (!ret
&& !other_cdb
) {
494 pr_debug("Allowing explict CDB: 0x%02x for %s"
495 " reservation holder\n", cdb
[0],
496 core_scsi3_pr_dump_type(pr_reg_type
));
501 * Check if write exclusive initiator ports *NOT* holding the
502 * WRITE_EXCLUSIVE_* reservation.
504 if ((we
) && !(registered_nexus
)) {
505 if (cmd
->data_direction
== DMA_TO_DEVICE
) {
507 * Conflict for write exclusive
509 pr_debug("%s Conflict for unregistered nexus"
510 " %s CDB: 0x%02x to %s reservation\n",
511 transport_dump_cmd_direction(cmd
),
512 se_sess
->se_node_acl
->initiatorname
, cdb
[0],
513 core_scsi3_pr_dump_type(pr_reg_type
));
517 * Allow non WRITE CDBs for all Write Exclusive
518 * PR TYPEs to pass for registered and
519 * non-registered_nexuxes NOT holding the reservation.
521 * We only make noise for the unregisterd nexuses,
522 * as we expect registered non-reservation holding
523 * nexuses to issue CDBs.
526 if (!registered_nexus
) {
527 pr_debug("Allowing implict CDB: 0x%02x"
528 " for %s reservation on unregistered"
530 core_scsi3_pr_dump_type(pr_reg_type
));
535 } else if ((reg_only
) || (all_reg
)) {
536 if (registered_nexus
) {
538 * For PR_*_REG_ONLY and PR_*_ALL_REG reservations,
539 * allow commands from registered nexuses.
542 pr_debug("Allowing implict CDB: 0x%02x for %s"
543 " reservation\n", cdb
[0],
544 core_scsi3_pr_dump_type(pr_reg_type
));
549 pr_debug("%s Conflict for %sregistered nexus %s CDB: 0x%2x"
550 " for %s reservation\n", transport_dump_cmd_direction(cmd
),
551 (registered_nexus
) ? "" : "un",
552 se_sess
->se_node_acl
->initiatorname
, cdb
[0],
553 core_scsi3_pr_dump_type(pr_reg_type
));
555 return 1; /* Conflict by default */
558 static u32
core_scsi3_pr_generation(struct se_device
*dev
)
560 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
563 * PRGeneration field shall contain the value of a 32-bit wrapping
564 * counter mainted by the device server.
566 * Note that this is done regardless of Active Persist across
567 * Target PowerLoss (APTPL)
569 * See spc4r17 section 6.3.12 READ_KEYS service action
571 spin_lock(&dev
->dev_reservation_lock
);
572 prg
= su_dev
->t10_pr
.pr_generation
++;
573 spin_unlock(&dev
->dev_reservation_lock
);
578 static int core_scsi3_pr_reservation_check(
582 struct se_device
*dev
= cmd
->se_dev
;
583 struct se_session
*sess
= cmd
->se_sess
;
589 * A legacy SPC-2 reservation is being held.
591 if (dev
->dev_flags
& DF_SPC2_RESERVATIONS
)
592 return core_scsi2_reservation_check(cmd
, pr_reg_type
);
594 spin_lock(&dev
->dev_reservation_lock
);
595 if (!dev
->dev_pr_res_holder
) {
596 spin_unlock(&dev
->dev_reservation_lock
);
599 *pr_reg_type
= dev
->dev_pr_res_holder
->pr_res_type
;
600 cmd
->pr_res_key
= dev
->dev_pr_res_holder
->pr_res_key
;
601 if (dev
->dev_pr_res_holder
->pr_reg_nacl
!= sess
->se_node_acl
) {
602 spin_unlock(&dev
->dev_reservation_lock
);
605 if (!dev
->dev_pr_res_holder
->isid_present_at_reg
) {
606 spin_unlock(&dev
->dev_reservation_lock
);
609 ret
= (dev
->dev_pr_res_holder
->pr_reg_bin_isid
==
610 sess
->sess_bin_isid
) ? 0 : -EINVAL
;
612 * Use bit in *pr_reg_type to notify ISID mismatch in
613 * core_scsi3_pr_seq_non_holder().
616 *pr_reg_type
|= 0x80000000;
617 spin_unlock(&dev
->dev_reservation_lock
);
622 static struct t10_pr_registration
*__core_scsi3_do_alloc_registration(
623 struct se_device
*dev
,
624 struct se_node_acl
*nacl
,
625 struct se_dev_entry
*deve
,
631 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
632 struct t10_pr_registration
*pr_reg
;
634 pr_reg
= kmem_cache_zalloc(t10_pr_reg_cache
, GFP_ATOMIC
);
636 pr_err("Unable to allocate struct t10_pr_registration\n");
640 pr_reg
->pr_aptpl_buf
= kzalloc(su_dev
->t10_pr
.pr_aptpl_buf_len
,
642 if (!pr_reg
->pr_aptpl_buf
) {
643 pr_err("Unable to allocate pr_reg->pr_aptpl_buf\n");
644 kmem_cache_free(t10_pr_reg_cache
, pr_reg
);
648 INIT_LIST_HEAD(&pr_reg
->pr_reg_list
);
649 INIT_LIST_HEAD(&pr_reg
->pr_reg_abort_list
);
650 INIT_LIST_HEAD(&pr_reg
->pr_reg_aptpl_list
);
651 INIT_LIST_HEAD(&pr_reg
->pr_reg_atp_list
);
652 INIT_LIST_HEAD(&pr_reg
->pr_reg_atp_mem_list
);
653 atomic_set(&pr_reg
->pr_res_holders
, 0);
654 pr_reg
->pr_reg_nacl
= nacl
;
655 pr_reg
->pr_reg_deve
= deve
;
656 pr_reg
->pr_res_mapped_lun
= deve
->mapped_lun
;
657 pr_reg
->pr_aptpl_target_lun
= deve
->se_lun
->unpacked_lun
;
658 pr_reg
->pr_res_key
= sa_res_key
;
659 pr_reg
->pr_reg_all_tg_pt
= all_tg_pt
;
660 pr_reg
->pr_reg_aptpl
= aptpl
;
661 pr_reg
->pr_reg_tg_pt_lun
= deve
->se_lun
;
663 * If an ISID value for this SCSI Initiator Port exists,
664 * save it to the registration now.
667 pr_reg
->pr_reg_bin_isid
= get_unaligned_be64(isid
);
668 snprintf(pr_reg
->pr_reg_isid
, PR_REG_ISID_LEN
, "%s", isid
);
669 pr_reg
->isid_present_at_reg
= 1;
675 static int core_scsi3_lunacl_depend_item(struct se_dev_entry
*);
676 static void core_scsi3_lunacl_undepend_item(struct se_dev_entry
*);
679 * Function used for handling PR registrations for ALL_TG_PT=1 and ALL_TG_PT=0
682 static struct t10_pr_registration
*__core_scsi3_alloc_registration(
683 struct se_device
*dev
,
684 struct se_node_acl
*nacl
,
685 struct se_dev_entry
*deve
,
691 struct se_dev_entry
*deve_tmp
;
692 struct se_node_acl
*nacl_tmp
;
693 struct se_port
*port
, *port_tmp
;
694 struct target_core_fabric_ops
*tfo
= nacl
->se_tpg
->se_tpg_tfo
;
695 struct t10_pr_registration
*pr_reg
, *pr_reg_atp
, *pr_reg_tmp
, *pr_reg_tmp_safe
;
698 * Create a registration for the I_T Nexus upon which the
699 * PROUT REGISTER was received.
701 pr_reg
= __core_scsi3_do_alloc_registration(dev
, nacl
, deve
, isid
,
702 sa_res_key
, all_tg_pt
, aptpl
);
706 * Return pointer to pr_reg for ALL_TG_PT=0
711 * Create list of matching SCSI Initiator Port registrations
714 spin_lock(&dev
->se_port_lock
);
715 list_for_each_entry_safe(port
, port_tmp
, &dev
->dev_sep_list
, sep_list
) {
716 atomic_inc(&port
->sep_tg_pt_ref_cnt
);
717 smp_mb__after_atomic_inc();
718 spin_unlock(&dev
->se_port_lock
);
720 spin_lock_bh(&port
->sep_alua_lock
);
721 list_for_each_entry(deve_tmp
, &port
->sep_alua_list
,
724 * This pointer will be NULL for demo mode MappedLUNs
725 * that have not been make explict via a ConfigFS
726 * MappedLUN group for the SCSI Initiator Node ACL.
728 if (!deve_tmp
->se_lun_acl
)
731 nacl_tmp
= deve_tmp
->se_lun_acl
->se_lun_nacl
;
733 * Skip the matching struct se_node_acl that is allocated
736 if (nacl
== nacl_tmp
)
739 * Only perform PR registrations for target ports on
740 * the same fabric module as the REGISTER w/ ALL_TG_PT=1
743 if (tfo
!= nacl_tmp
->se_tpg
->se_tpg_tfo
)
746 * Look for a matching Initiator Node ACL in ASCII format
748 if (strcmp(nacl
->initiatorname
, nacl_tmp
->initiatorname
))
751 atomic_inc(&deve_tmp
->pr_ref_count
);
752 smp_mb__after_atomic_inc();
753 spin_unlock_bh(&port
->sep_alua_lock
);
755 * Grab a configfs group dependency that is released
756 * for the exception path at label out: below, or upon
757 * completion of adding ALL_TG_PT=1 registrations in
758 * __core_scsi3_add_registration()
760 ret
= core_scsi3_lunacl_depend_item(deve_tmp
);
762 pr_err("core_scsi3_lunacl_depend"
764 atomic_dec(&port
->sep_tg_pt_ref_cnt
);
765 smp_mb__after_atomic_dec();
766 atomic_dec(&deve_tmp
->pr_ref_count
);
767 smp_mb__after_atomic_dec();
771 * Located a matching SCSI Initiator Port on a different
772 * port, allocate the pr_reg_atp and attach it to the
773 * pr_reg->pr_reg_atp_list that will be processed once
774 * the original *pr_reg is processed in
775 * __core_scsi3_add_registration()
777 pr_reg_atp
= __core_scsi3_do_alloc_registration(dev
,
778 nacl_tmp
, deve_tmp
, NULL
,
779 sa_res_key
, all_tg_pt
, aptpl
);
781 atomic_dec(&port
->sep_tg_pt_ref_cnt
);
782 smp_mb__after_atomic_dec();
783 atomic_dec(&deve_tmp
->pr_ref_count
);
784 smp_mb__after_atomic_dec();
785 core_scsi3_lunacl_undepend_item(deve_tmp
);
789 list_add_tail(&pr_reg_atp
->pr_reg_atp_mem_list
,
790 &pr_reg
->pr_reg_atp_list
);
791 spin_lock_bh(&port
->sep_alua_lock
);
793 spin_unlock_bh(&port
->sep_alua_lock
);
795 spin_lock(&dev
->se_port_lock
);
796 atomic_dec(&port
->sep_tg_pt_ref_cnt
);
797 smp_mb__after_atomic_dec();
799 spin_unlock(&dev
->se_port_lock
);
803 list_for_each_entry_safe(pr_reg_tmp
, pr_reg_tmp_safe
,
804 &pr_reg
->pr_reg_atp_list
, pr_reg_atp_mem_list
) {
805 list_del(&pr_reg_tmp
->pr_reg_atp_mem_list
);
806 core_scsi3_lunacl_undepend_item(pr_reg_tmp
->pr_reg_deve
);
807 kmem_cache_free(t10_pr_reg_cache
, pr_reg_tmp
);
809 kmem_cache_free(t10_pr_reg_cache
, pr_reg
);
813 int core_scsi3_alloc_aptpl_registration(
814 struct t10_reservation
*pr_tmpl
,
816 unsigned char *i_port
,
819 unsigned char *t_port
,
826 struct t10_pr_registration
*pr_reg
;
828 if (!i_port
|| !t_port
|| !sa_res_key
) {
829 pr_err("Illegal parameters for APTPL registration\n");
833 pr_reg
= kmem_cache_zalloc(t10_pr_reg_cache
, GFP_KERNEL
);
835 pr_err("Unable to allocate struct t10_pr_registration\n");
838 pr_reg
->pr_aptpl_buf
= kzalloc(pr_tmpl
->pr_aptpl_buf_len
, GFP_KERNEL
);
840 INIT_LIST_HEAD(&pr_reg
->pr_reg_list
);
841 INIT_LIST_HEAD(&pr_reg
->pr_reg_abort_list
);
842 INIT_LIST_HEAD(&pr_reg
->pr_reg_aptpl_list
);
843 INIT_LIST_HEAD(&pr_reg
->pr_reg_atp_list
);
844 INIT_LIST_HEAD(&pr_reg
->pr_reg_atp_mem_list
);
845 atomic_set(&pr_reg
->pr_res_holders
, 0);
846 pr_reg
->pr_reg_nacl
= NULL
;
847 pr_reg
->pr_reg_deve
= NULL
;
848 pr_reg
->pr_res_mapped_lun
= mapped_lun
;
849 pr_reg
->pr_aptpl_target_lun
= target_lun
;
850 pr_reg
->pr_res_key
= sa_res_key
;
851 pr_reg
->pr_reg_all_tg_pt
= all_tg_pt
;
852 pr_reg
->pr_reg_aptpl
= 1;
853 pr_reg
->pr_reg_tg_pt_lun
= NULL
;
854 pr_reg
->pr_res_scope
= 0; /* Always LUN_SCOPE */
855 pr_reg
->pr_res_type
= type
;
857 * If an ISID value had been saved in APTPL metadata for this
858 * SCSI Initiator Port, restore it now.
861 pr_reg
->pr_reg_bin_isid
= get_unaligned_be64(isid
);
862 snprintf(pr_reg
->pr_reg_isid
, PR_REG_ISID_LEN
, "%s", isid
);
863 pr_reg
->isid_present_at_reg
= 1;
866 * Copy the i_port and t_port information from caller.
868 snprintf(pr_reg
->pr_iport
, PR_APTPL_MAX_IPORT_LEN
, "%s", i_port
);
869 snprintf(pr_reg
->pr_tport
, PR_APTPL_MAX_TPORT_LEN
, "%s", t_port
);
870 pr_reg
->pr_reg_tpgt
= tpgt
;
872 * Set pr_res_holder from caller, the pr_reg who is the reservation
873 * holder will get it's pointer set in core_scsi3_aptpl_reserve() once
874 * the Initiator Node LUN ACL from the fabric module is created for
877 pr_reg
->pr_res_holder
= res_holder
;
879 list_add_tail(&pr_reg
->pr_reg_aptpl_list
, &pr_tmpl
->aptpl_reg_list
);
880 pr_debug("SPC-3 PR APTPL Successfully added registration%s from"
881 " metadata\n", (res_holder
) ? "+reservation" : "");
885 static void core_scsi3_aptpl_reserve(
886 struct se_device
*dev
,
887 struct se_portal_group
*tpg
,
888 struct se_node_acl
*node_acl
,
889 struct t10_pr_registration
*pr_reg
)
891 char i_buf
[PR_REG_ISID_ID_LEN
];
894 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
895 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
898 spin_lock(&dev
->dev_reservation_lock
);
899 dev
->dev_pr_res_holder
= pr_reg
;
900 spin_unlock(&dev
->dev_reservation_lock
);
902 pr_debug("SPC-3 PR [%s] Service Action: APTPL RESERVE created"
903 " new reservation holder TYPE: %s ALL_TG_PT: %d\n",
904 tpg
->se_tpg_tfo
->get_fabric_name(),
905 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
),
906 (pr_reg
->pr_reg_all_tg_pt
) ? 1 : 0);
907 pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
908 tpg
->se_tpg_tfo
->get_fabric_name(), node_acl
->initiatorname
,
909 (prf_isid
) ? &i_buf
[0] : "");
912 static void __core_scsi3_add_registration(struct se_device
*, struct se_node_acl
*,
913 struct t10_pr_registration
*, int, int);
915 static int __core_scsi3_check_aptpl_registration(
916 struct se_device
*dev
,
917 struct se_portal_group
*tpg
,
920 struct se_node_acl
*nacl
,
921 struct se_dev_entry
*deve
)
923 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
;
924 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
925 unsigned char i_port
[PR_APTPL_MAX_IPORT_LEN
];
926 unsigned char t_port
[PR_APTPL_MAX_TPORT_LEN
];
929 memset(i_port
, 0, PR_APTPL_MAX_IPORT_LEN
);
930 memset(t_port
, 0, PR_APTPL_MAX_TPORT_LEN
);
932 * Copy Initiator Port information from struct se_node_acl
934 snprintf(i_port
, PR_APTPL_MAX_IPORT_LEN
, "%s", nacl
->initiatorname
);
935 snprintf(t_port
, PR_APTPL_MAX_TPORT_LEN
, "%s",
936 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
));
937 tpgt
= tpg
->se_tpg_tfo
->tpg_get_tag(tpg
);
939 * Look for the matching registrations+reservation from those
940 * created from APTPL metadata. Note that multiple registrations
941 * may exist for fabrics that use ISIDs in their SCSI Initiator Port
944 spin_lock(&pr_tmpl
->aptpl_reg_lock
);
945 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
, &pr_tmpl
->aptpl_reg_list
,
947 if (!strcmp(pr_reg
->pr_iport
, i_port
) &&
948 (pr_reg
->pr_res_mapped_lun
== deve
->mapped_lun
) &&
949 !(strcmp(pr_reg
->pr_tport
, t_port
)) &&
950 (pr_reg
->pr_reg_tpgt
== tpgt
) &&
951 (pr_reg
->pr_aptpl_target_lun
== target_lun
)) {
953 pr_reg
->pr_reg_nacl
= nacl
;
954 pr_reg
->pr_reg_deve
= deve
;
955 pr_reg
->pr_reg_tg_pt_lun
= lun
;
957 list_del(&pr_reg
->pr_reg_aptpl_list
);
958 spin_unlock(&pr_tmpl
->aptpl_reg_lock
);
960 * At this point all of the pointers in *pr_reg will
961 * be setup, so go ahead and add the registration.
964 __core_scsi3_add_registration(dev
, nacl
, pr_reg
, 0, 0);
966 * If this registration is the reservation holder,
967 * make that happen now..
969 if (pr_reg
->pr_res_holder
)
970 core_scsi3_aptpl_reserve(dev
, tpg
,
973 * Reenable pr_aptpl_active to accept new metadata
974 * updates once the SCSI device is active again..
976 spin_lock(&pr_tmpl
->aptpl_reg_lock
);
977 pr_tmpl
->pr_aptpl_active
= 1;
980 spin_unlock(&pr_tmpl
->aptpl_reg_lock
);
985 int core_scsi3_check_aptpl_registration(
986 struct se_device
*dev
,
987 struct se_portal_group
*tpg
,
989 struct se_lun_acl
*lun_acl
)
991 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
992 struct se_node_acl
*nacl
= lun_acl
->se_lun_nacl
;
993 struct se_dev_entry
*deve
= &nacl
->device_list
[lun_acl
->mapped_lun
];
995 if (su_dev
->t10_pr
.res_type
!= SPC3_PERSISTENT_RESERVATIONS
)
998 return __core_scsi3_check_aptpl_registration(dev
, tpg
, lun
,
999 lun
->unpacked_lun
, nacl
, deve
);
1002 static void __core_scsi3_dump_registration(
1003 struct target_core_fabric_ops
*tfo
,
1004 struct se_device
*dev
,
1005 struct se_node_acl
*nacl
,
1006 struct t10_pr_registration
*pr_reg
,
1009 struct se_portal_group
*se_tpg
= nacl
->se_tpg
;
1010 char i_buf
[PR_REG_ISID_ID_LEN
];
1013 memset(&i_buf
[0], 0, PR_REG_ISID_ID_LEN
);
1014 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
1015 PR_REG_ISID_ID_LEN
);
1017 pr_debug("SPC-3 PR [%s] Service Action: REGISTER%s Initiator"
1018 " Node: %s%s\n", tfo
->get_fabric_name(), (register_type
== 2) ?
1019 "_AND_MOVE" : (register_type
== 1) ?
1020 "_AND_IGNORE_EXISTING_KEY" : "", nacl
->initiatorname
,
1021 (prf_isid
) ? i_buf
: "");
1022 pr_debug("SPC-3 PR [%s] registration on Target Port: %s,0x%04x\n",
1023 tfo
->get_fabric_name(), tfo
->tpg_get_wwn(se_tpg
),
1024 tfo
->tpg_get_tag(se_tpg
));
1025 pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
1026 " Port(s)\n", tfo
->get_fabric_name(),
1027 (pr_reg
->pr_reg_all_tg_pt
) ? "ALL" : "SINGLE",
1028 dev
->transport
->name
);
1029 pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
1030 " 0x%08x APTPL: %d\n", tfo
->get_fabric_name(),
1031 pr_reg
->pr_res_key
, pr_reg
->pr_res_generation
,
1032 pr_reg
->pr_reg_aptpl
);
1036 * this function can be called with struct se_device->dev_reservation_lock
1037 * when register_move = 1
1039 static void __core_scsi3_add_registration(
1040 struct se_device
*dev
,
1041 struct se_node_acl
*nacl
,
1042 struct t10_pr_registration
*pr_reg
,
1046 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
1047 struct target_core_fabric_ops
*tfo
= nacl
->se_tpg
->se_tpg_tfo
;
1048 struct t10_pr_registration
*pr_reg_tmp
, *pr_reg_tmp_safe
;
1049 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
1052 * Increment PRgeneration counter for struct se_device upon a successful
1053 * REGISTER, see spc4r17 section 6.3.2 READ_KEYS service action
1055 * Also, when register_move = 1 for PROUT REGISTER_AND_MOVE service
1056 * action, the struct se_device->dev_reservation_lock will already be held,
1057 * so we do not call core_scsi3_pr_generation() which grabs the lock
1060 pr_reg
->pr_res_generation
= (register_move
) ?
1061 su_dev
->t10_pr
.pr_generation
++ :
1062 core_scsi3_pr_generation(dev
);
1064 spin_lock(&pr_tmpl
->registration_lock
);
1065 list_add_tail(&pr_reg
->pr_reg_list
, &pr_tmpl
->registration_list
);
1066 pr_reg
->pr_reg_deve
->def_pr_registered
= 1;
1068 __core_scsi3_dump_registration(tfo
, dev
, nacl
, pr_reg
, register_type
);
1069 spin_unlock(&pr_tmpl
->registration_lock
);
1071 * Skip extra processing for ALL_TG_PT=0 or REGISTER_AND_MOVE.
1073 if (!pr_reg
->pr_reg_all_tg_pt
|| register_move
)
1076 * Walk pr_reg->pr_reg_atp_list and add registrations for ALL_TG_PT=1
1077 * allocated in __core_scsi3_alloc_registration()
1079 list_for_each_entry_safe(pr_reg_tmp
, pr_reg_tmp_safe
,
1080 &pr_reg
->pr_reg_atp_list
, pr_reg_atp_mem_list
) {
1081 list_del(&pr_reg_tmp
->pr_reg_atp_mem_list
);
1083 pr_reg_tmp
->pr_res_generation
= core_scsi3_pr_generation(dev
);
1085 spin_lock(&pr_tmpl
->registration_lock
);
1086 list_add_tail(&pr_reg_tmp
->pr_reg_list
,
1087 &pr_tmpl
->registration_list
);
1088 pr_reg_tmp
->pr_reg_deve
->def_pr_registered
= 1;
1090 __core_scsi3_dump_registration(tfo
, dev
,
1091 pr_reg_tmp
->pr_reg_nacl
, pr_reg_tmp
,
1093 spin_unlock(&pr_tmpl
->registration_lock
);
1095 * Drop configfs group dependency reference from
1096 * __core_scsi3_alloc_registration()
1098 core_scsi3_lunacl_undepend_item(pr_reg_tmp
->pr_reg_deve
);
1102 static int core_scsi3_alloc_registration(
1103 struct se_device
*dev
,
1104 struct se_node_acl
*nacl
,
1105 struct se_dev_entry
*deve
,
1106 unsigned char *isid
,
1113 struct t10_pr_registration
*pr_reg
;
1115 pr_reg
= __core_scsi3_alloc_registration(dev
, nacl
, deve
, isid
,
1116 sa_res_key
, all_tg_pt
, aptpl
);
1120 __core_scsi3_add_registration(dev
, nacl
, pr_reg
,
1121 register_type
, register_move
);
1125 static struct t10_pr_registration
*__core_scsi3_locate_pr_reg(
1126 struct se_device
*dev
,
1127 struct se_node_acl
*nacl
,
1128 unsigned char *isid
)
1130 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
1131 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
;
1132 struct se_portal_group
*tpg
;
1134 spin_lock(&pr_tmpl
->registration_lock
);
1135 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
1136 &pr_tmpl
->registration_list
, pr_reg_list
) {
1138 * First look for a matching struct se_node_acl
1140 if (pr_reg
->pr_reg_nacl
!= nacl
)
1143 tpg
= pr_reg
->pr_reg_nacl
->se_tpg
;
1145 * If this registration does NOT contain a fabric provided
1146 * ISID, then we have found a match.
1148 if (!pr_reg
->isid_present_at_reg
) {
1150 * Determine if this SCSI device server requires that
1151 * SCSI Intiatior TransportID w/ ISIDs is enforced
1152 * for fabric modules (iSCSI) requiring them.
1154 if (tpg
->se_tpg_tfo
->sess_get_initiator_sid
!= NULL
) {
1155 if (dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
)
1158 atomic_inc(&pr_reg
->pr_res_holders
);
1159 smp_mb__after_atomic_inc();
1160 spin_unlock(&pr_tmpl
->registration_lock
);
1164 * If the *pr_reg contains a fabric defined ISID for multi-value
1165 * SCSI Initiator Port TransportIDs, then we expect a valid
1166 * matching ISID to be provided by the local SCSI Initiator Port.
1170 if (strcmp(isid
, pr_reg
->pr_reg_isid
))
1173 atomic_inc(&pr_reg
->pr_res_holders
);
1174 smp_mb__after_atomic_inc();
1175 spin_unlock(&pr_tmpl
->registration_lock
);
1178 spin_unlock(&pr_tmpl
->registration_lock
);
1183 static struct t10_pr_registration
*core_scsi3_locate_pr_reg(
1184 struct se_device
*dev
,
1185 struct se_node_acl
*nacl
,
1186 struct se_session
*sess
)
1188 struct se_portal_group
*tpg
= nacl
->se_tpg
;
1189 unsigned char buf
[PR_REG_ISID_LEN
], *isid_ptr
= NULL
;
1191 if (tpg
->se_tpg_tfo
->sess_get_initiator_sid
!= NULL
) {
1192 memset(&buf
[0], 0, PR_REG_ISID_LEN
);
1193 tpg
->se_tpg_tfo
->sess_get_initiator_sid(sess
, &buf
[0],
1198 return __core_scsi3_locate_pr_reg(dev
, nacl
, isid_ptr
);
1201 static void core_scsi3_put_pr_reg(struct t10_pr_registration
*pr_reg
)
1203 atomic_dec(&pr_reg
->pr_res_holders
);
1204 smp_mb__after_atomic_dec();
1207 static int core_scsi3_check_implict_release(
1208 struct se_device
*dev
,
1209 struct t10_pr_registration
*pr_reg
)
1211 struct se_node_acl
*nacl
= pr_reg
->pr_reg_nacl
;
1212 struct t10_pr_registration
*pr_res_holder
;
1215 spin_lock(&dev
->dev_reservation_lock
);
1216 pr_res_holder
= dev
->dev_pr_res_holder
;
1217 if (!pr_res_holder
) {
1218 spin_unlock(&dev
->dev_reservation_lock
);
1221 if (pr_res_holder
== pr_reg
) {
1223 * Perform an implict RELEASE if the registration that
1224 * is being released is holding the reservation.
1226 * From spc4r17, section 5.7.11.1:
1228 * e) If the I_T nexus is the persistent reservation holder
1229 * and the persistent reservation is not an all registrants
1230 * type, then a PERSISTENT RESERVE OUT command with REGISTER
1231 * service action or REGISTER AND IGNORE EXISTING KEY
1232 * service action with the SERVICE ACTION RESERVATION KEY
1233 * field set to zero (see 5.7.11.3).
1235 __core_scsi3_complete_pro_release(dev
, nacl
, pr_reg
, 0);
1238 * For 'All Registrants' reservation types, all existing
1239 * registrations are still processed as reservation holders
1240 * in core_scsi3_pr_seq_non_holder() after the initial
1241 * reservation holder is implictly released here.
1243 } else if (pr_reg
->pr_reg_all_tg_pt
&&
1244 (!strcmp(pr_res_holder
->pr_reg_nacl
->initiatorname
,
1245 pr_reg
->pr_reg_nacl
->initiatorname
)) &&
1246 (pr_res_holder
->pr_res_key
== pr_reg
->pr_res_key
)) {
1247 pr_err("SPC-3 PR: Unable to perform ALL_TG_PT=1"
1248 " UNREGISTER while existing reservation with matching"
1249 " key 0x%016Lx is present from another SCSI Initiator"
1250 " Port\n", pr_reg
->pr_res_key
);
1253 spin_unlock(&dev
->dev_reservation_lock
);
1259 * Called with struct t10_reservation->registration_lock held.
1261 static void __core_scsi3_free_registration(
1262 struct se_device
*dev
,
1263 struct t10_pr_registration
*pr_reg
,
1264 struct list_head
*preempt_and_abort_list
,
1267 struct target_core_fabric_ops
*tfo
=
1268 pr_reg
->pr_reg_nacl
->se_tpg
->se_tpg_tfo
;
1269 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
1270 char i_buf
[PR_REG_ISID_ID_LEN
];
1273 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1274 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
1275 PR_REG_ISID_ID_LEN
);
1277 pr_reg
->pr_reg_deve
->def_pr_registered
= 0;
1278 pr_reg
->pr_reg_deve
->pr_res_key
= 0;
1279 list_del(&pr_reg
->pr_reg_list
);
1281 * Caller accessing *pr_reg using core_scsi3_locate_pr_reg(),
1282 * so call core_scsi3_put_pr_reg() to decrement our reference.
1285 core_scsi3_put_pr_reg(pr_reg
);
1287 * Wait until all reference from any other I_T nexuses for this
1288 * *pr_reg have been released. Because list_del() is called above,
1289 * the last core_scsi3_put_pr_reg(pr_reg) will release this reference
1290 * count back to zero, and we release *pr_reg.
1292 while (atomic_read(&pr_reg
->pr_res_holders
) != 0) {
1293 spin_unlock(&pr_tmpl
->registration_lock
);
1294 pr_debug("SPC-3 PR [%s] waiting for pr_res_holders\n",
1295 tfo
->get_fabric_name());
1297 spin_lock(&pr_tmpl
->registration_lock
);
1300 pr_debug("SPC-3 PR [%s] Service Action: UNREGISTER Initiator"
1301 " Node: %s%s\n", tfo
->get_fabric_name(),
1302 pr_reg
->pr_reg_nacl
->initiatorname
,
1303 (prf_isid
) ? &i_buf
[0] : "");
1304 pr_debug("SPC-3 PR [%s] for %s TCM Subsystem %s Object Target"
1305 " Port(s)\n", tfo
->get_fabric_name(),
1306 (pr_reg
->pr_reg_all_tg_pt
) ? "ALL" : "SINGLE",
1307 dev
->transport
->name
);
1308 pr_debug("SPC-3 PR [%s] SA Res Key: 0x%016Lx PRgeneration:"
1309 " 0x%08x\n", tfo
->get_fabric_name(), pr_reg
->pr_res_key
,
1310 pr_reg
->pr_res_generation
);
1312 if (!preempt_and_abort_list
) {
1313 pr_reg
->pr_reg_deve
= NULL
;
1314 pr_reg
->pr_reg_nacl
= NULL
;
1315 kfree(pr_reg
->pr_aptpl_buf
);
1316 kmem_cache_free(t10_pr_reg_cache
, pr_reg
);
1320 * For PREEMPT_AND_ABORT, the list of *pr_reg in preempt_and_abort_list
1321 * are released once the ABORT_TASK_SET has completed..
1323 list_add_tail(&pr_reg
->pr_reg_abort_list
, preempt_and_abort_list
);
1326 void core_scsi3_free_pr_reg_from_nacl(
1327 struct se_device
*dev
,
1328 struct se_node_acl
*nacl
)
1330 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
1331 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
, *pr_res_holder
;
1333 * If the passed se_node_acl matches the reservation holder,
1334 * release the reservation.
1336 spin_lock(&dev
->dev_reservation_lock
);
1337 pr_res_holder
= dev
->dev_pr_res_holder
;
1338 if ((pr_res_holder
!= NULL
) &&
1339 (pr_res_holder
->pr_reg_nacl
== nacl
))
1340 __core_scsi3_complete_pro_release(dev
, nacl
, pr_res_holder
, 0);
1341 spin_unlock(&dev
->dev_reservation_lock
);
1343 * Release any registration associated with the struct se_node_acl.
1345 spin_lock(&pr_tmpl
->registration_lock
);
1346 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
1347 &pr_tmpl
->registration_list
, pr_reg_list
) {
1349 if (pr_reg
->pr_reg_nacl
!= nacl
)
1352 __core_scsi3_free_registration(dev
, pr_reg
, NULL
, 0);
1354 spin_unlock(&pr_tmpl
->registration_lock
);
1357 void core_scsi3_free_all_registrations(
1358 struct se_device
*dev
)
1360 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
1361 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
, *pr_res_holder
;
1363 spin_lock(&dev
->dev_reservation_lock
);
1364 pr_res_holder
= dev
->dev_pr_res_holder
;
1365 if (pr_res_holder
!= NULL
) {
1366 struct se_node_acl
*pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
1367 __core_scsi3_complete_pro_release(dev
, pr_res_nacl
,
1370 spin_unlock(&dev
->dev_reservation_lock
);
1372 spin_lock(&pr_tmpl
->registration_lock
);
1373 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
1374 &pr_tmpl
->registration_list
, pr_reg_list
) {
1376 __core_scsi3_free_registration(dev
, pr_reg
, NULL
, 0);
1378 spin_unlock(&pr_tmpl
->registration_lock
);
1380 spin_lock(&pr_tmpl
->aptpl_reg_lock
);
1381 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
, &pr_tmpl
->aptpl_reg_list
,
1382 pr_reg_aptpl_list
) {
1383 list_del(&pr_reg
->pr_reg_aptpl_list
);
1384 kfree(pr_reg
->pr_aptpl_buf
);
1385 kmem_cache_free(t10_pr_reg_cache
, pr_reg
);
1387 spin_unlock(&pr_tmpl
->aptpl_reg_lock
);
1390 static int core_scsi3_tpg_depend_item(struct se_portal_group
*tpg
)
1392 return configfs_depend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1393 &tpg
->tpg_group
.cg_item
);
1396 static void core_scsi3_tpg_undepend_item(struct se_portal_group
*tpg
)
1398 configfs_undepend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1399 &tpg
->tpg_group
.cg_item
);
1401 atomic_dec(&tpg
->tpg_pr_ref_count
);
1402 smp_mb__after_atomic_dec();
1405 static int core_scsi3_nodeacl_depend_item(struct se_node_acl
*nacl
)
1407 struct se_portal_group
*tpg
= nacl
->se_tpg
;
1409 if (nacl
->dynamic_node_acl
)
1412 return configfs_depend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1413 &nacl
->acl_group
.cg_item
);
1416 static void core_scsi3_nodeacl_undepend_item(struct se_node_acl
*nacl
)
1418 struct se_portal_group
*tpg
= nacl
->se_tpg
;
1420 if (nacl
->dynamic_node_acl
) {
1421 atomic_dec(&nacl
->acl_pr_ref_count
);
1422 smp_mb__after_atomic_dec();
1426 configfs_undepend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1427 &nacl
->acl_group
.cg_item
);
1429 atomic_dec(&nacl
->acl_pr_ref_count
);
1430 smp_mb__after_atomic_dec();
1433 static int core_scsi3_lunacl_depend_item(struct se_dev_entry
*se_deve
)
1435 struct se_lun_acl
*lun_acl
= se_deve
->se_lun_acl
;
1436 struct se_node_acl
*nacl
;
1437 struct se_portal_group
*tpg
;
1439 * For nacl->dynamic_node_acl=1
1444 nacl
= lun_acl
->se_lun_nacl
;
1447 return configfs_depend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1448 &lun_acl
->se_lun_group
.cg_item
);
1451 static void core_scsi3_lunacl_undepend_item(struct se_dev_entry
*se_deve
)
1453 struct se_lun_acl
*lun_acl
= se_deve
->se_lun_acl
;
1454 struct se_node_acl
*nacl
;
1455 struct se_portal_group
*tpg
;
1457 * For nacl->dynamic_node_acl=1
1460 atomic_dec(&se_deve
->pr_ref_count
);
1461 smp_mb__after_atomic_dec();
1464 nacl
= lun_acl
->se_lun_nacl
;
1467 configfs_undepend_item(tpg
->se_tpg_tfo
->tf_subsys
,
1468 &lun_acl
->se_lun_group
.cg_item
);
1470 atomic_dec(&se_deve
->pr_ref_count
);
1471 smp_mb__after_atomic_dec();
1474 static int core_scsi3_decode_spec_i_port(
1476 struct se_portal_group
*tpg
,
1477 unsigned char *l_isid
,
1482 struct se_device
*dev
= cmd
->se_dev
;
1483 struct se_port
*tmp_port
;
1484 struct se_portal_group
*dest_tpg
= NULL
, *tmp_tpg
;
1485 struct se_session
*se_sess
= cmd
->se_sess
;
1486 struct se_node_acl
*dest_node_acl
= NULL
;
1487 struct se_dev_entry
*dest_se_deve
= NULL
, *local_se_deve
;
1488 struct t10_pr_registration
*dest_pr_reg
, *local_pr_reg
, *pr_reg_e
;
1489 struct t10_pr_registration
*pr_reg_tmp
, *pr_reg_tmp_safe
;
1490 struct list_head tid_dest_list
;
1491 struct pr_transport_id_holder
*tidh_new
, *tidh
, *tidh_tmp
;
1492 struct target_core_fabric_ops
*tmp_tf_ops
;
1494 unsigned char *ptr
, *i_str
= NULL
, proto_ident
, tmp_proto_ident
;
1495 char *iport_ptr
= NULL
, dest_iport
[64], i_buf
[PR_REG_ISID_ID_LEN
];
1496 u32 tpdl
, tid_len
= 0;
1497 int ret
, dest_local_nexus
, prf_isid
;
1500 memset(dest_iport
, 0, 64);
1501 INIT_LIST_HEAD(&tid_dest_list
);
1503 local_se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
1505 * Allocate a struct pr_transport_id_holder and setup the
1506 * local_node_acl and local_se_deve pointers and add to
1507 * struct list_head tid_dest_list for add registration
1508 * processing in the loop of tid_dest_list below.
1510 tidh_new
= kzalloc(sizeof(struct pr_transport_id_holder
), GFP_KERNEL
);
1512 pr_err("Unable to allocate tidh_new\n");
1513 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1516 INIT_LIST_HEAD(&tidh_new
->dest_list
);
1517 tidh_new
->dest_tpg
= tpg
;
1518 tidh_new
->dest_node_acl
= se_sess
->se_node_acl
;
1519 tidh_new
->dest_se_deve
= local_se_deve
;
1521 local_pr_reg
= __core_scsi3_alloc_registration(cmd
->se_dev
,
1522 se_sess
->se_node_acl
, local_se_deve
, l_isid
,
1523 sa_res_key
, all_tg_pt
, aptpl
);
1524 if (!local_pr_reg
) {
1526 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1529 tidh_new
->dest_pr_reg
= local_pr_reg
;
1531 * The local I_T nexus does not hold any configfs dependances,
1532 * so we set tid_h->dest_local_nexus=1 to prevent the
1533 * configfs_undepend_item() calls in the tid_dest_list loops below.
1535 tidh_new
->dest_local_nexus
= 1;
1536 list_add_tail(&tidh_new
->dest_list
, &tid_dest_list
);
1538 buf
= transport_kmap_data_sg(cmd
);
1540 * For a PERSISTENT RESERVE OUT specify initiator ports payload,
1541 * first extract TransportID Parameter Data Length, and make sure
1542 * the value matches up to the SCSI expected data transfer length.
1544 tpdl
= (buf
[24] & 0xff) << 24;
1545 tpdl
|= (buf
[25] & 0xff) << 16;
1546 tpdl
|= (buf
[26] & 0xff) << 8;
1547 tpdl
|= buf
[27] & 0xff;
1549 if ((tpdl
+ 28) != cmd
->data_length
) {
1550 pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header"
1551 " does not equal CDB data_length: %u\n", tpdl
,
1553 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
1558 * Start processing the received transport IDs using the
1559 * receiving I_T Nexus portal's fabric dependent methods to
1560 * obtain the SCSI Initiator Port/Device Identifiers.
1565 proto_ident
= (ptr
[0] & 0x0f);
1568 spin_lock(&dev
->se_port_lock
);
1569 list_for_each_entry(tmp_port
, &dev
->dev_sep_list
, sep_list
) {
1570 tmp_tpg
= tmp_port
->sep_tpg
;
1573 tmp_tf_ops
= tmp_tpg
->se_tpg_tfo
;
1576 if (!tmp_tf_ops
->get_fabric_proto_ident
||
1577 !tmp_tf_ops
->tpg_parse_pr_out_transport_id
)
1580 * Look for the matching proto_ident provided by
1581 * the received TransportID
1583 tmp_proto_ident
= tmp_tf_ops
->get_fabric_proto_ident(tmp_tpg
);
1584 if (tmp_proto_ident
!= proto_ident
)
1586 dest_rtpi
= tmp_port
->sep_rtpi
;
1588 i_str
= tmp_tf_ops
->tpg_parse_pr_out_transport_id(
1589 tmp_tpg
, (const char *)ptr
, &tid_len
,
1594 atomic_inc(&tmp_tpg
->tpg_pr_ref_count
);
1595 smp_mb__after_atomic_inc();
1596 spin_unlock(&dev
->se_port_lock
);
1598 ret
= core_scsi3_tpg_depend_item(tmp_tpg
);
1600 pr_err(" core_scsi3_tpg_depend_item()"
1602 atomic_dec(&tmp_tpg
->tpg_pr_ref_count
);
1603 smp_mb__after_atomic_dec();
1604 cmd
->scsi_sense_reason
=
1605 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1610 * Locate the desination initiator ACL to be registered
1611 * from the decoded fabric module specific TransportID
1614 spin_lock_irq(&tmp_tpg
->acl_node_lock
);
1615 dest_node_acl
= __core_tpg_get_initiator_node_acl(
1617 if (dest_node_acl
) {
1618 atomic_inc(&dest_node_acl
->acl_pr_ref_count
);
1619 smp_mb__after_atomic_inc();
1621 spin_unlock_irq(&tmp_tpg
->acl_node_lock
);
1623 if (!dest_node_acl
) {
1624 core_scsi3_tpg_undepend_item(tmp_tpg
);
1625 spin_lock(&dev
->se_port_lock
);
1629 ret
= core_scsi3_nodeacl_depend_item(dest_node_acl
);
1631 pr_err("configfs_depend_item() failed"
1632 " for dest_node_acl->acl_group\n");
1633 atomic_dec(&dest_node_acl
->acl_pr_ref_count
);
1634 smp_mb__after_atomic_dec();
1635 core_scsi3_tpg_undepend_item(tmp_tpg
);
1636 cmd
->scsi_sense_reason
=
1637 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1643 pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node:"
1644 " %s Port RTPI: %hu\n",
1645 dest_tpg
->se_tpg_tfo
->get_fabric_name(),
1646 dest_node_acl
->initiatorname
, dest_rtpi
);
1648 spin_lock(&dev
->se_port_lock
);
1651 spin_unlock(&dev
->se_port_lock
);
1654 pr_err("SPC-3 PR SPEC_I_PT: Unable to locate"
1656 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
1661 pr_debug("SPC-3 PR SPEC_I_PT: Got %s data_length: %u tpdl: %u"
1662 " tid_len: %d for %s + %s\n",
1663 dest_tpg
->se_tpg_tfo
->get_fabric_name(), cmd
->data_length
,
1664 tpdl
, tid_len
, i_str
, iport_ptr
);
1666 if (tid_len
> tpdl
) {
1667 pr_err("SPC-3 PR SPEC_I_PT: Illegal tid_len:"
1668 " %u for Transport ID: %s\n", tid_len
, ptr
);
1669 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1670 core_scsi3_tpg_undepend_item(dest_tpg
);
1671 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
1676 * Locate the desintation struct se_dev_entry pointer for matching
1677 * RELATIVE TARGET PORT IDENTIFIER on the receiving I_T Nexus
1680 dest_se_deve
= core_get_se_deve_from_rtpi(dest_node_acl
,
1682 if (!dest_se_deve
) {
1683 pr_err("Unable to locate %s dest_se_deve"
1684 " from destination RTPI: %hu\n",
1685 dest_tpg
->se_tpg_tfo
->get_fabric_name(),
1688 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1689 core_scsi3_tpg_undepend_item(dest_tpg
);
1690 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
1695 ret
= core_scsi3_lunacl_depend_item(dest_se_deve
);
1697 pr_err("core_scsi3_lunacl_depend_item()"
1699 atomic_dec(&dest_se_deve
->pr_ref_count
);
1700 smp_mb__after_atomic_dec();
1701 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1702 core_scsi3_tpg_undepend_item(dest_tpg
);
1703 cmd
->scsi_sense_reason
=
1704 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1709 pr_debug("SPC-3 PR SPEC_I_PT: Located %s Node: %s"
1710 " dest_se_deve mapped_lun: %u\n",
1711 dest_tpg
->se_tpg_tfo
->get_fabric_name(),
1712 dest_node_acl
->initiatorname
, dest_se_deve
->mapped_lun
);
1715 * Skip any TransportIDs that already have a registration for
1718 pr_reg_e
= __core_scsi3_locate_pr_reg(dev
, dest_node_acl
,
1721 core_scsi3_put_pr_reg(pr_reg_e
);
1722 core_scsi3_lunacl_undepend_item(dest_se_deve
);
1723 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1724 core_scsi3_tpg_undepend_item(dest_tpg
);
1731 * Allocate a struct pr_transport_id_holder and setup
1732 * the dest_node_acl and dest_se_deve pointers for the
1735 tidh_new
= kzalloc(sizeof(struct pr_transport_id_holder
),
1738 pr_err("Unable to allocate tidh_new\n");
1739 core_scsi3_lunacl_undepend_item(dest_se_deve
);
1740 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1741 core_scsi3_tpg_undepend_item(dest_tpg
);
1742 cmd
->scsi_sense_reason
=
1743 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
1747 INIT_LIST_HEAD(&tidh_new
->dest_list
);
1748 tidh_new
->dest_tpg
= dest_tpg
;
1749 tidh_new
->dest_node_acl
= dest_node_acl
;
1750 tidh_new
->dest_se_deve
= dest_se_deve
;
1753 * Allocate, but do NOT add the registration for the
1754 * TransportID referenced SCSI Initiator port. This
1755 * done because of the following from spc4r17 in section
1756 * 6.14.3 wrt SPEC_I_PT:
1758 * "If a registration fails for any initiator port (e.g., if th
1759 * logical unit does not have enough resources available to
1760 * hold the registration information), no registrations shall be
1761 * made, and the command shall be terminated with
1762 * CHECK CONDITION status."
1764 * That means we call __core_scsi3_alloc_registration() here,
1765 * and then call __core_scsi3_add_registration() in the
1766 * 2nd loop which will never fail.
1768 dest_pr_reg
= __core_scsi3_alloc_registration(cmd
->se_dev
,
1769 dest_node_acl
, dest_se_deve
, iport_ptr
,
1770 sa_res_key
, all_tg_pt
, aptpl
);
1772 core_scsi3_lunacl_undepend_item(dest_se_deve
);
1773 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1774 core_scsi3_tpg_undepend_item(dest_tpg
);
1776 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
1780 tidh_new
->dest_pr_reg
= dest_pr_reg
;
1781 list_add_tail(&tidh_new
->dest_list
, &tid_dest_list
);
1789 transport_kunmap_data_sg(cmd
);
1792 * Go ahead and create a registrations from tid_dest_list for the
1793 * SPEC_I_PT provided TransportID for the *tidh referenced dest_node_acl
1796 * The SA Reservation Key from the PROUT is set for the
1797 * registration, and ALL_TG_PT is also passed. ALL_TG_PT=1
1798 * means that the TransportID Initiator port will be
1799 * registered on all of the target ports in the SCSI target device
1800 * ALL_TG_PT=0 means the registration will only be for the
1801 * SCSI target port the PROUT REGISTER with SPEC_I_PT=1
1804 list_for_each_entry_safe(tidh
, tidh_tmp
, &tid_dest_list
, dest_list
) {
1805 dest_tpg
= tidh
->dest_tpg
;
1806 dest_node_acl
= tidh
->dest_node_acl
;
1807 dest_se_deve
= tidh
->dest_se_deve
;
1808 dest_pr_reg
= tidh
->dest_pr_reg
;
1809 dest_local_nexus
= tidh
->dest_local_nexus
;
1811 list_del(&tidh
->dest_list
);
1814 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
1815 prf_isid
= core_pr_dump_initiator_port(dest_pr_reg
, &i_buf
[0],
1816 PR_REG_ISID_ID_LEN
);
1818 __core_scsi3_add_registration(cmd
->se_dev
, dest_node_acl
,
1821 pr_debug("SPC-3 PR [%s] SPEC_I_PT: Successfully"
1822 " registered Transport ID for Node: %s%s Mapped LUN:"
1823 " %u\n", dest_tpg
->se_tpg_tfo
->get_fabric_name(),
1824 dest_node_acl
->initiatorname
, (prf_isid
) ?
1825 &i_buf
[0] : "", dest_se_deve
->mapped_lun
);
1827 if (dest_local_nexus
)
1830 core_scsi3_lunacl_undepend_item(dest_se_deve
);
1831 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1832 core_scsi3_tpg_undepend_item(dest_tpg
);
1837 transport_kunmap_data_sg(cmd
);
1839 * For the failure case, release everything from tid_dest_list
1840 * including *dest_pr_reg and the configfs dependances..
1842 list_for_each_entry_safe(tidh
, tidh_tmp
, &tid_dest_list
, dest_list
) {
1843 dest_tpg
= tidh
->dest_tpg
;
1844 dest_node_acl
= tidh
->dest_node_acl
;
1845 dest_se_deve
= tidh
->dest_se_deve
;
1846 dest_pr_reg
= tidh
->dest_pr_reg
;
1847 dest_local_nexus
= tidh
->dest_local_nexus
;
1849 list_del(&tidh
->dest_list
);
1852 * Release any extra ALL_TG_PT=1 registrations for
1853 * the SPEC_I_PT=1 case.
1855 list_for_each_entry_safe(pr_reg_tmp
, pr_reg_tmp_safe
,
1856 &dest_pr_reg
->pr_reg_atp_list
,
1857 pr_reg_atp_mem_list
) {
1858 list_del(&pr_reg_tmp
->pr_reg_atp_mem_list
);
1859 core_scsi3_lunacl_undepend_item(pr_reg_tmp
->pr_reg_deve
);
1860 kmem_cache_free(t10_pr_reg_cache
, pr_reg_tmp
);
1863 kfree(dest_pr_reg
->pr_aptpl_buf
);
1864 kmem_cache_free(t10_pr_reg_cache
, dest_pr_reg
);
1866 if (dest_local_nexus
)
1869 core_scsi3_lunacl_undepend_item(dest_se_deve
);
1870 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
1871 core_scsi3_tpg_undepend_item(dest_tpg
);
1877 * Called with struct se_device->dev_reservation_lock held
1879 static int __core_scsi3_update_aptpl_buf(
1880 struct se_device
*dev
,
1882 u32 pr_aptpl_buf_len
,
1883 int clear_aptpl_metadata
)
1886 struct se_portal_group
*tpg
;
1887 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
1888 struct t10_pr_registration
*pr_reg
;
1889 unsigned char tmp
[512], isid_buf
[32];
1893 memset(buf
, 0, pr_aptpl_buf_len
);
1895 * Called to clear metadata once APTPL has been deactivated.
1897 if (clear_aptpl_metadata
) {
1898 snprintf(buf
, pr_aptpl_buf_len
,
1899 "No Registrations or Reservations\n");
1903 * Walk the registration list..
1905 spin_lock(&su_dev
->t10_pr
.registration_lock
);
1906 list_for_each_entry(pr_reg
, &su_dev
->t10_pr
.registration_list
,
1911 tpg
= pr_reg
->pr_reg_nacl
->se_tpg
;
1912 lun
= pr_reg
->pr_reg_tg_pt_lun
;
1914 * Write out any ISID value to APTPL metadata that was included
1915 * in the original registration.
1917 if (pr_reg
->isid_present_at_reg
)
1918 snprintf(isid_buf
, 32, "initiator_sid=%s\n",
1919 pr_reg
->pr_reg_isid
);
1921 * Include special metadata if the pr_reg matches the
1922 * reservation holder.
1924 if (dev
->dev_pr_res_holder
== pr_reg
) {
1925 snprintf(tmp
, 512, "PR_REG_START: %d"
1926 "\ninitiator_fabric=%s\n"
1927 "initiator_node=%s\n%s"
1929 "res_holder=1\nres_type=%02x\n"
1930 "res_scope=%02x\nres_all_tg_pt=%d\n"
1931 "mapped_lun=%u\n", reg_count
,
1932 tpg
->se_tpg_tfo
->get_fabric_name(),
1933 pr_reg
->pr_reg_nacl
->initiatorname
, isid_buf
,
1934 pr_reg
->pr_res_key
, pr_reg
->pr_res_type
,
1935 pr_reg
->pr_res_scope
, pr_reg
->pr_reg_all_tg_pt
,
1936 pr_reg
->pr_res_mapped_lun
);
1938 snprintf(tmp
, 512, "PR_REG_START: %d\n"
1939 "initiator_fabric=%s\ninitiator_node=%s\n%s"
1940 "sa_res_key=%llu\nres_holder=0\n"
1941 "res_all_tg_pt=%d\nmapped_lun=%u\n",
1942 reg_count
, tpg
->se_tpg_tfo
->get_fabric_name(),
1943 pr_reg
->pr_reg_nacl
->initiatorname
, isid_buf
,
1944 pr_reg
->pr_res_key
, pr_reg
->pr_reg_all_tg_pt
,
1945 pr_reg
->pr_res_mapped_lun
);
1948 if ((len
+ strlen(tmp
) >= pr_aptpl_buf_len
)) {
1949 pr_err("Unable to update renaming"
1950 " APTPL metadata\n");
1951 spin_unlock(&su_dev
->t10_pr
.registration_lock
);
1954 len
+= sprintf(buf
+len
, "%s", tmp
);
1957 * Include information about the associated SCSI target port.
1959 snprintf(tmp
, 512, "target_fabric=%s\ntarget_node=%s\n"
1960 "tpgt=%hu\nport_rtpi=%hu\ntarget_lun=%u\nPR_REG_END:"
1961 " %d\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1962 tpg
->se_tpg_tfo
->tpg_get_wwn(tpg
),
1963 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
1964 lun
->lun_sep
->sep_rtpi
, lun
->unpacked_lun
, reg_count
);
1966 if ((len
+ strlen(tmp
) >= pr_aptpl_buf_len
)) {
1967 pr_err("Unable to update renaming"
1968 " APTPL metadata\n");
1969 spin_unlock(&su_dev
->t10_pr
.registration_lock
);
1972 len
+= sprintf(buf
+len
, "%s", tmp
);
1975 spin_unlock(&su_dev
->t10_pr
.registration_lock
);
1978 len
+= sprintf(buf
+len
, "No Registrations or Reservations");
1983 static int core_scsi3_update_aptpl_buf(
1984 struct se_device
*dev
,
1986 u32 pr_aptpl_buf_len
,
1987 int clear_aptpl_metadata
)
1991 spin_lock(&dev
->dev_reservation_lock
);
1992 ret
= __core_scsi3_update_aptpl_buf(dev
, buf
, pr_aptpl_buf_len
,
1993 clear_aptpl_metadata
);
1994 spin_unlock(&dev
->dev_reservation_lock
);
2000 * Called with struct se_device->aptpl_file_mutex held
2002 static int __core_scsi3_write_aptpl_to_file(
2003 struct se_device
*dev
,
2005 u32 pr_aptpl_buf_len
)
2007 struct t10_wwn
*wwn
= &dev
->se_sub_dev
->t10_wwn
;
2009 struct iovec iov
[1];
2010 mm_segment_t old_fs
;
2011 int flags
= O_RDWR
| O_CREAT
| O_TRUNC
;
2015 memset(iov
, 0, sizeof(struct iovec
));
2016 memset(path
, 0, 512);
2018 if (strlen(&wwn
->unit_serial
[0]) >= 512) {
2019 pr_err("WWN value for struct se_device does not fit"
2020 " into path buffer\n");
2024 snprintf(path
, 512, "/var/target/pr/aptpl_%s", &wwn
->unit_serial
[0]);
2025 file
= filp_open(path
, flags
, 0600);
2026 if (IS_ERR(file
) || !file
|| !file
->f_dentry
) {
2027 pr_err("filp_open(%s) for APTPL metadata"
2029 return (PTR_ERR(file
) < 0 ? PTR_ERR(file
) : -ENOENT
);
2032 iov
[0].iov_base
= &buf
[0];
2033 if (!pr_aptpl_buf_len
)
2034 iov
[0].iov_len
= (strlen(&buf
[0]) + 1); /* Add extra for NULL */
2036 iov
[0].iov_len
= pr_aptpl_buf_len
;
2040 ret
= vfs_writev(file
, &iov
[0], 1, &file
->f_pos
);
2044 pr_debug("Error writing APTPL metadata file: %s\n", path
);
2045 filp_close(file
, NULL
);
2048 filp_close(file
, NULL
);
2053 static int core_scsi3_update_and_write_aptpl(
2054 struct se_device
*dev
,
2055 unsigned char *in_buf
,
2056 u32 in_pr_aptpl_buf_len
)
2058 unsigned char null_buf
[64], *buf
;
2059 u32 pr_aptpl_buf_len
;
2060 int ret
, clear_aptpl_metadata
= 0;
2062 * Can be called with a NULL pointer from PROUT service action CLEAR
2065 memset(null_buf
, 0, 64);
2068 * This will clear the APTPL metadata to:
2069 * "No Registrations or Reservations" status
2071 pr_aptpl_buf_len
= 64;
2072 clear_aptpl_metadata
= 1;
2075 pr_aptpl_buf_len
= in_pr_aptpl_buf_len
;
2078 ret
= core_scsi3_update_aptpl_buf(dev
, buf
, pr_aptpl_buf_len
,
2079 clear_aptpl_metadata
);
2083 * __core_scsi3_write_aptpl_to_file() will call strlen()
2084 * on the passed buf to determine pr_aptpl_buf_len.
2086 ret
= __core_scsi3_write_aptpl_to_file(dev
, buf
, 0);
2093 static int core_scsi3_emulate_pro_register(
2102 struct se_session
*se_sess
= cmd
->se_sess
;
2103 struct se_device
*dev
= cmd
->se_dev
;
2104 struct se_dev_entry
*se_deve
;
2105 struct se_lun
*se_lun
= cmd
->se_lun
;
2106 struct se_portal_group
*se_tpg
;
2107 struct t10_pr_registration
*pr_reg
, *pr_reg_p
, *pr_reg_tmp
, *pr_reg_e
;
2108 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
2109 /* Used for APTPL metadata w/ UNREGISTER */
2110 unsigned char *pr_aptpl_buf
= NULL
;
2111 unsigned char isid_buf
[PR_REG_ISID_LEN
], *isid_ptr
= NULL
;
2112 int pr_holder
= 0, ret
= 0, type
;
2114 if (!se_sess
|| !se_lun
) {
2115 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2116 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2119 se_tpg
= se_sess
->se_tpg
;
2120 se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
2122 if (se_tpg
->se_tpg_tfo
->sess_get_initiator_sid
) {
2123 memset(&isid_buf
[0], 0, PR_REG_ISID_LEN
);
2124 se_tpg
->se_tpg_tfo
->sess_get_initiator_sid(se_sess
, &isid_buf
[0],
2126 isid_ptr
= &isid_buf
[0];
2129 * Follow logic from spc4r17 Section 5.7.7, Register Behaviors Table 47
2131 pr_reg_e
= core_scsi3_locate_pr_reg(dev
, se_sess
->se_node_acl
, se_sess
);
2134 pr_warn("SPC-3 PR: Reservation Key non-zero"
2135 " for SA REGISTER, returning CONFLICT\n");
2136 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2140 * Do nothing but return GOOD status.
2147 * Perform the Service Action REGISTER on the Initiator
2148 * Port Endpoint that the PRO was received from on the
2149 * Logical Unit of the SCSI device server.
2151 ret
= core_scsi3_alloc_registration(cmd
->se_dev
,
2152 se_sess
->se_node_acl
, se_deve
, isid_ptr
,
2153 sa_res_key
, all_tg_pt
, aptpl
,
2156 pr_err("Unable to allocate"
2157 " struct t10_pr_registration\n");
2158 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
2163 * Register both the Initiator port that received
2164 * PROUT SA REGISTER + SPEC_I_PT=1 and extract SCSI
2165 * TransportID from Parameter list and loop through
2166 * fabric dependent parameter list while calling
2167 * logic from of core_scsi3_alloc_registration() for
2168 * each TransportID provided SCSI Initiator Port/Device
2170 ret
= core_scsi3_decode_spec_i_port(cmd
, se_tpg
,
2171 isid_ptr
, sa_res_key
, all_tg_pt
, aptpl
);
2176 * Nothing left to do for the APTPL=0 case.
2179 pr_tmpl
->pr_aptpl_active
= 0;
2180 core_scsi3_update_and_write_aptpl(cmd
->se_dev
, NULL
, 0);
2181 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
2186 * Locate the newly allocated local I_T Nexus *pr_reg, and
2187 * update the APTPL metadata information using its
2188 * preallocated *pr_reg->pr_aptpl_buf.
2190 pr_reg
= core_scsi3_locate_pr_reg(cmd
->se_dev
,
2191 se_sess
->se_node_acl
, se_sess
);
2193 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
2194 &pr_reg
->pr_aptpl_buf
[0],
2195 pr_tmpl
->pr_aptpl_buf_len
);
2197 pr_tmpl
->pr_aptpl_active
= 1;
2198 pr_debug("SPC-3 PR: Set APTPL Bit Activated for REGISTER\n");
2201 core_scsi3_put_pr_reg(pr_reg
);
2205 * Locate the existing *pr_reg via struct se_node_acl pointers
2208 type
= pr_reg
->pr_res_type
;
2211 if (res_key
!= pr_reg
->pr_res_key
) {
2212 pr_err("SPC-3 PR REGISTER: Received"
2213 " res_key: 0x%016Lx does not match"
2214 " existing SA REGISTER res_key:"
2215 " 0x%016Lx\n", res_key
,
2216 pr_reg
->pr_res_key
);
2217 core_scsi3_put_pr_reg(pr_reg
);
2218 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2223 pr_err("SPC-3 PR UNREGISTER: SPEC_I_PT"
2224 " set while sa_res_key=0\n");
2225 core_scsi3_put_pr_reg(pr_reg
);
2226 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
2230 * An existing ALL_TG_PT=1 registration being released
2231 * must also set ALL_TG_PT=1 in the incoming PROUT.
2233 if (pr_reg
->pr_reg_all_tg_pt
&& !(all_tg_pt
)) {
2234 pr_err("SPC-3 PR UNREGISTER: ALL_TG_PT=1"
2235 " registration exists, but ALL_TG_PT=1 bit not"
2236 " present in received PROUT\n");
2237 core_scsi3_put_pr_reg(pr_reg
);
2238 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
2242 * Allocate APTPL metadata buffer used for UNREGISTER ops
2245 pr_aptpl_buf
= kzalloc(pr_tmpl
->pr_aptpl_buf_len
,
2247 if (!pr_aptpl_buf
) {
2248 pr_err("Unable to allocate"
2250 core_scsi3_put_pr_reg(pr_reg
);
2251 cmd
->scsi_sense_reason
=
2252 TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2257 * sa_res_key=0 Unregister Reservation Key for registered I_T
2258 * Nexus sa_res_key=1 Change Reservation Key for registered I_T
2262 pr_holder
= core_scsi3_check_implict_release(
2263 cmd
->se_dev
, pr_reg
);
2264 if (pr_holder
< 0) {
2265 kfree(pr_aptpl_buf
);
2266 core_scsi3_put_pr_reg(pr_reg
);
2267 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2271 spin_lock(&pr_tmpl
->registration_lock
);
2273 * Release all ALL_TG_PT=1 for the matching SCSI Initiator Port
2274 * and matching pr_res_key.
2276 if (pr_reg
->pr_reg_all_tg_pt
) {
2277 list_for_each_entry_safe(pr_reg_p
, pr_reg_tmp
,
2278 &pr_tmpl
->registration_list
,
2281 if (!pr_reg_p
->pr_reg_all_tg_pt
)
2284 if (pr_reg_p
->pr_res_key
!= res_key
)
2287 if (pr_reg
== pr_reg_p
)
2290 if (strcmp(pr_reg
->pr_reg_nacl
->initiatorname
,
2291 pr_reg_p
->pr_reg_nacl
->initiatorname
))
2294 __core_scsi3_free_registration(dev
,
2299 * Release the calling I_T Nexus registration now..
2301 __core_scsi3_free_registration(cmd
->se_dev
, pr_reg
,
2304 * From spc4r17, section 5.7.11.3 Unregistering
2306 * If the persistent reservation is a registrants only
2307 * type, the device server shall establish a unit
2308 * attention condition for the initiator port associated
2309 * with every registered I_T nexus except for the I_T
2310 * nexus on which the PERSISTENT RESERVE OUT command was
2311 * received, with the additional sense code set to
2312 * RESERVATIONS RELEASED.
2315 ((type
== PR_TYPE_WRITE_EXCLUSIVE_REGONLY
) ||
2316 (type
== PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
))) {
2317 list_for_each_entry(pr_reg_p
,
2318 &pr_tmpl
->registration_list
,
2321 core_scsi3_ua_allocate(
2322 pr_reg_p
->pr_reg_nacl
,
2323 pr_reg_p
->pr_res_mapped_lun
,
2325 ASCQ_2AH_RESERVATIONS_RELEASED
);
2328 spin_unlock(&pr_tmpl
->registration_lock
);
2331 pr_tmpl
->pr_aptpl_active
= 0;
2332 core_scsi3_update_and_write_aptpl(dev
, NULL
, 0);
2333 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
2334 " for UNREGISTER\n");
2338 ret
= core_scsi3_update_and_write_aptpl(dev
,
2340 pr_tmpl
->pr_aptpl_buf_len
);
2342 pr_tmpl
->pr_aptpl_active
= 1;
2343 pr_debug("SPC-3 PR: Set APTPL Bit Activated"
2344 " for UNREGISTER\n");
2347 kfree(pr_aptpl_buf
);
2351 * Increment PRgeneration counter for struct se_device"
2352 * upon a successful REGISTER, see spc4r17 section 6.3.2
2353 * READ_KEYS service action.
2355 pr_reg
->pr_res_generation
= core_scsi3_pr_generation(
2357 pr_reg
->pr_res_key
= sa_res_key
;
2358 pr_debug("SPC-3 PR [%s] REGISTER%s: Changed Reservation"
2359 " Key for %s to: 0x%016Lx PRgeneration:"
2360 " 0x%08x\n", cmd
->se_tfo
->get_fabric_name(),
2361 (ignore_key
) ? "_AND_IGNORE_EXISTING_KEY" : "",
2362 pr_reg
->pr_reg_nacl
->initiatorname
,
2363 pr_reg
->pr_res_key
, pr_reg
->pr_res_generation
);
2366 pr_tmpl
->pr_aptpl_active
= 0;
2367 core_scsi3_update_and_write_aptpl(dev
, NULL
, 0);
2368 core_scsi3_put_pr_reg(pr_reg
);
2369 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated"
2374 ret
= core_scsi3_update_and_write_aptpl(dev
,
2376 pr_tmpl
->pr_aptpl_buf_len
);
2378 pr_tmpl
->pr_aptpl_active
= 1;
2379 pr_debug("SPC-3 PR: Set APTPL Bit Activated"
2383 kfree(pr_aptpl_buf
);
2384 core_scsi3_put_pr_reg(pr_reg
);
2390 unsigned char *core_scsi3_pr_dump_type(int type
)
2393 case PR_TYPE_WRITE_EXCLUSIVE
:
2394 return "Write Exclusive Access";
2395 case PR_TYPE_EXCLUSIVE_ACCESS
:
2396 return "Exclusive Access";
2397 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY
:
2398 return "Write Exclusive Access, Registrants Only";
2399 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
:
2400 return "Exclusive Access, Registrants Only";
2401 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG
:
2402 return "Write Exclusive Access, All Registrants";
2403 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
:
2404 return "Exclusive Access, All Registrants";
2409 return "Unknown SPC-3 PR Type";
2412 static int core_scsi3_pro_reserve(
2414 struct se_device
*dev
,
2419 struct se_session
*se_sess
= cmd
->se_sess
;
2420 struct se_dev_entry
*se_deve
;
2421 struct se_lun
*se_lun
= cmd
->se_lun
;
2422 struct se_portal_group
*se_tpg
;
2423 struct t10_pr_registration
*pr_reg
, *pr_res_holder
;
2424 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
2425 char i_buf
[PR_REG_ISID_ID_LEN
];
2428 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
2430 if (!se_sess
|| !se_lun
) {
2431 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2432 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2435 se_tpg
= se_sess
->se_tpg
;
2436 se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
2438 * Locate the existing *pr_reg via struct se_node_acl pointers
2440 pr_reg
= core_scsi3_locate_pr_reg(cmd
->se_dev
, se_sess
->se_node_acl
,
2443 pr_err("SPC-3 PR: Unable to locate"
2444 " PR_REGISTERED *pr_reg for RESERVE\n");
2445 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2449 * From spc4r17 Section 5.7.9: Reserving:
2451 * An application client creates a persistent reservation by issuing
2452 * a PERSISTENT RESERVE OUT command with RESERVE service action through
2453 * a registered I_T nexus with the following parameters:
2454 * a) RESERVATION KEY set to the value of the reservation key that is
2455 * registered with the logical unit for the I_T nexus; and
2457 if (res_key
!= pr_reg
->pr_res_key
) {
2458 pr_err("SPC-3 PR RESERVE: Received res_key: 0x%016Lx"
2459 " does not match existing SA REGISTER res_key:"
2460 " 0x%016Lx\n", res_key
, pr_reg
->pr_res_key
);
2461 core_scsi3_put_pr_reg(pr_reg
);
2462 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2466 * From spc4r17 Section 5.7.9: Reserving:
2469 * b) TYPE field and SCOPE field set to the persistent reservation
2472 * Only one persistent reservation is allowed at a time per logical unit
2473 * and that persistent reservation has a scope of LU_SCOPE.
2475 if (scope
!= PR_SCOPE_LU_SCOPE
) {
2476 pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope
);
2477 core_scsi3_put_pr_reg(pr_reg
);
2478 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
2482 * See if we have an existing PR reservation holder pointer at
2483 * struct se_device->dev_pr_res_holder in the form struct t10_pr_registration
2486 spin_lock(&dev
->dev_reservation_lock
);
2487 pr_res_holder
= dev
->dev_pr_res_holder
;
2488 if ((pr_res_holder
)) {
2490 * From spc4r17 Section 5.7.9: Reserving:
2492 * If the device server receives a PERSISTENT RESERVE OUT
2493 * command from an I_T nexus other than a persistent reservation
2494 * holder (see 5.7.10) that attempts to create a persistent
2495 * reservation when a persistent reservation already exists for
2496 * the logical unit, then the command shall be completed with
2497 * RESERVATION CONFLICT status.
2499 if (pr_res_holder
!= pr_reg
) {
2500 struct se_node_acl
*pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
2501 pr_err("SPC-3 PR: Attempted RESERVE from"
2502 " [%s]: %s while reservation already held by"
2503 " [%s]: %s, returning RESERVATION_CONFLICT\n",
2504 cmd
->se_tfo
->get_fabric_name(),
2505 se_sess
->se_node_acl
->initiatorname
,
2506 pr_res_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
2507 pr_res_holder
->pr_reg_nacl
->initiatorname
);
2509 spin_unlock(&dev
->dev_reservation_lock
);
2510 core_scsi3_put_pr_reg(pr_reg
);
2511 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2515 * From spc4r17 Section 5.7.9: Reserving:
2517 * If a persistent reservation holder attempts to modify the
2518 * type or scope of an existing persistent reservation, the
2519 * command shall be completed with RESERVATION CONFLICT status.
2521 if ((pr_res_holder
->pr_res_type
!= type
) ||
2522 (pr_res_holder
->pr_res_scope
!= scope
)) {
2523 struct se_node_acl
*pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
2524 pr_err("SPC-3 PR: Attempted RESERVE from"
2525 " [%s]: %s trying to change TYPE and/or SCOPE,"
2526 " while reservation already held by [%s]: %s,"
2527 " returning RESERVATION_CONFLICT\n",
2528 cmd
->se_tfo
->get_fabric_name(),
2529 se_sess
->se_node_acl
->initiatorname
,
2530 pr_res_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
2531 pr_res_holder
->pr_reg_nacl
->initiatorname
);
2533 spin_unlock(&dev
->dev_reservation_lock
);
2534 core_scsi3_put_pr_reg(pr_reg
);
2535 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2539 * From spc4r17 Section 5.7.9: Reserving:
2541 * If the device server receives a PERSISTENT RESERVE OUT
2542 * command with RESERVE service action where the TYPE field and
2543 * the SCOPE field contain the same values as the existing type
2544 * and scope from a persistent reservation holder, it shall not
2545 * make any change to the existing persistent reservation and
2546 * shall completethe command with GOOD status.
2548 spin_unlock(&dev
->dev_reservation_lock
);
2549 core_scsi3_put_pr_reg(pr_reg
);
2553 * Otherwise, our *pr_reg becomes the PR reservation holder for said
2554 * TYPE/SCOPE. Also set the received scope and type in *pr_reg.
2556 pr_reg
->pr_res_scope
= scope
;
2557 pr_reg
->pr_res_type
= type
;
2558 pr_reg
->pr_res_holder
= 1;
2559 dev
->dev_pr_res_holder
= pr_reg
;
2560 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
2561 PR_REG_ISID_ID_LEN
);
2563 pr_debug("SPC-3 PR [%s] Service Action: RESERVE created new"
2564 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2565 cmd
->se_tfo
->get_fabric_name(), core_scsi3_pr_dump_type(type
),
2566 (pr_reg
->pr_reg_all_tg_pt
) ? 1 : 0);
2567 pr_debug("SPC-3 PR [%s] RESERVE Node: %s%s\n",
2568 cmd
->se_tfo
->get_fabric_name(),
2569 se_sess
->se_node_acl
->initiatorname
,
2570 (prf_isid
) ? &i_buf
[0] : "");
2571 spin_unlock(&dev
->dev_reservation_lock
);
2573 if (pr_tmpl
->pr_aptpl_active
) {
2574 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
2575 &pr_reg
->pr_aptpl_buf
[0],
2576 pr_tmpl
->pr_aptpl_buf_len
);
2578 pr_debug("SPC-3 PR: Updated APTPL metadata"
2582 core_scsi3_put_pr_reg(pr_reg
);
2586 static int core_scsi3_emulate_pro_reserve(
2592 struct se_device
*dev
= cmd
->se_dev
;
2596 case PR_TYPE_WRITE_EXCLUSIVE
:
2597 case PR_TYPE_EXCLUSIVE_ACCESS
:
2598 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY
:
2599 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
:
2600 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG
:
2601 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
:
2602 ret
= core_scsi3_pro_reserve(cmd
, dev
, type
, scope
, res_key
);
2605 pr_err("SPC-3 PR: Unknown Service Action RESERVE Type:"
2607 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
2615 * Called with struct se_device->dev_reservation_lock held.
2617 static void __core_scsi3_complete_pro_release(
2618 struct se_device
*dev
,
2619 struct se_node_acl
*se_nacl
,
2620 struct t10_pr_registration
*pr_reg
,
2623 struct target_core_fabric_ops
*tfo
= se_nacl
->se_tpg
->se_tpg_tfo
;
2624 char i_buf
[PR_REG_ISID_ID_LEN
];
2627 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
2628 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
2629 PR_REG_ISID_ID_LEN
);
2631 * Go ahead and release the current PR reservation holder.
2633 dev
->dev_pr_res_holder
= NULL
;
2635 pr_debug("SPC-3 PR [%s] Service Action: %s RELEASE cleared"
2636 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2637 tfo
->get_fabric_name(), (explict
) ? "explict" : "implict",
2638 core_scsi3_pr_dump_type(pr_reg
->pr_res_type
),
2639 (pr_reg
->pr_reg_all_tg_pt
) ? 1 : 0);
2640 pr_debug("SPC-3 PR [%s] RELEASE Node: %s%s\n",
2641 tfo
->get_fabric_name(), se_nacl
->initiatorname
,
2642 (prf_isid
) ? &i_buf
[0] : "");
2644 * Clear TYPE and SCOPE for the next PROUT Service Action: RESERVE
2646 pr_reg
->pr_res_holder
= pr_reg
->pr_res_type
= pr_reg
->pr_res_scope
= 0;
2649 static int core_scsi3_emulate_pro_release(
2655 struct se_device
*dev
= cmd
->se_dev
;
2656 struct se_session
*se_sess
= cmd
->se_sess
;
2657 struct se_lun
*se_lun
= cmd
->se_lun
;
2658 struct t10_pr_registration
*pr_reg
, *pr_reg_p
, *pr_res_holder
;
2659 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
2660 int ret
, all_reg
= 0;
2662 if (!se_sess
|| !se_lun
) {
2663 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
2664 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2668 * Locate the existing *pr_reg via struct se_node_acl pointers
2670 pr_reg
= core_scsi3_locate_pr_reg(dev
, se_sess
->se_node_acl
, se_sess
);
2672 pr_err("SPC-3 PR: Unable to locate"
2673 " PR_REGISTERED *pr_reg for RELEASE\n");
2674 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2678 * From spc4r17 Section 5.7.11.2 Releasing:
2680 * If there is no persistent reservation or in response to a persistent
2681 * reservation release request from a registered I_T nexus that is not a
2682 * persistent reservation holder (see 5.7.10), the device server shall
2685 * a) Not release the persistent reservation, if any;
2686 * b) Not remove any registrations; and
2687 * c) Complete the command with GOOD status.
2689 spin_lock(&dev
->dev_reservation_lock
);
2690 pr_res_holder
= dev
->dev_pr_res_holder
;
2691 if (!pr_res_holder
) {
2693 * No persistent reservation, return GOOD status.
2695 spin_unlock(&dev
->dev_reservation_lock
);
2696 core_scsi3_put_pr_reg(pr_reg
);
2699 if ((pr_res_holder
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) ||
2700 (pr_res_holder
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
))
2703 if ((all_reg
== 0) && (pr_res_holder
!= pr_reg
)) {
2705 * Non 'All Registrants' PR Type cases..
2706 * Release request from a registered I_T nexus that is not a
2707 * persistent reservation holder. return GOOD status.
2709 spin_unlock(&dev
->dev_reservation_lock
);
2710 core_scsi3_put_pr_reg(pr_reg
);
2714 * From spc4r17 Section 5.7.11.2 Releasing:
2716 * Only the persistent reservation holder (see 5.7.10) is allowed to
2717 * release a persistent reservation.
2719 * An application client releases the persistent reservation by issuing
2720 * a PERSISTENT RESERVE OUT command with RELEASE service action through
2721 * an I_T nexus that is a persistent reservation holder with the
2722 * following parameters:
2724 * a) RESERVATION KEY field set to the value of the reservation key
2725 * that is registered with the logical unit for the I_T nexus;
2727 if (res_key
!= pr_reg
->pr_res_key
) {
2728 pr_err("SPC-3 PR RELEASE: Received res_key: 0x%016Lx"
2729 " does not match existing SA REGISTER res_key:"
2730 " 0x%016Lx\n", res_key
, pr_reg
->pr_res_key
);
2731 spin_unlock(&dev
->dev_reservation_lock
);
2732 core_scsi3_put_pr_reg(pr_reg
);
2733 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2737 * From spc4r17 Section 5.7.11.2 Releasing and above:
2739 * b) TYPE field and SCOPE field set to match the persistent
2740 * reservation being released.
2742 if ((pr_res_holder
->pr_res_type
!= type
) ||
2743 (pr_res_holder
->pr_res_scope
!= scope
)) {
2744 struct se_node_acl
*pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
2745 pr_err("SPC-3 PR RELEASE: Attempted to release"
2746 " reservation from [%s]: %s with different TYPE "
2747 "and/or SCOPE while reservation already held by"
2748 " [%s]: %s, returning RESERVATION_CONFLICT\n",
2749 cmd
->se_tfo
->get_fabric_name(),
2750 se_sess
->se_node_acl
->initiatorname
,
2751 pr_res_nacl
->se_tpg
->se_tpg_tfo
->get_fabric_name(),
2752 pr_res_holder
->pr_reg_nacl
->initiatorname
);
2754 spin_unlock(&dev
->dev_reservation_lock
);
2755 core_scsi3_put_pr_reg(pr_reg
);
2756 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2760 * In response to a persistent reservation release request from the
2761 * persistent reservation holder the device server shall perform a
2762 * release by doing the following as an uninterrupted series of actions:
2763 * a) Release the persistent reservation;
2764 * b) Not remove any registration(s);
2765 * c) If the released persistent reservation is a registrants only type
2766 * or all registrants type persistent reservation,
2767 * the device server shall establish a unit attention condition for
2768 * the initiator port associated with every regis-
2769 * tered I_T nexus other than I_T nexus on which the PERSISTENT
2770 * RESERVE OUT command with RELEASE service action was received,
2771 * with the additional sense code set to RESERVATIONS RELEASED; and
2772 * d) If the persistent reservation is of any other type, the device
2773 * server shall not establish a unit attention condition.
2775 __core_scsi3_complete_pro_release(dev
, se_sess
->se_node_acl
,
2778 spin_unlock(&dev
->dev_reservation_lock
);
2780 if ((type
!= PR_TYPE_WRITE_EXCLUSIVE_REGONLY
) &&
2781 (type
!= PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
) &&
2782 (type
!= PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) &&
2783 (type
!= PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
)) {
2785 * If no UNIT ATTENTION conditions will be established for
2786 * PR_TYPE_WRITE_EXCLUSIVE or PR_TYPE_EXCLUSIVE_ACCESS
2787 * go ahead and check for APTPL=1 update+write below
2792 spin_lock(&pr_tmpl
->registration_lock
);
2793 list_for_each_entry(pr_reg_p
, &pr_tmpl
->registration_list
,
2796 * Do not establish a UNIT ATTENTION condition
2797 * for the calling I_T Nexus
2799 if (pr_reg_p
== pr_reg
)
2802 core_scsi3_ua_allocate(pr_reg_p
->pr_reg_nacl
,
2803 pr_reg_p
->pr_res_mapped_lun
,
2804 0x2A, ASCQ_2AH_RESERVATIONS_RELEASED
);
2806 spin_unlock(&pr_tmpl
->registration_lock
);
2809 if (pr_tmpl
->pr_aptpl_active
) {
2810 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
2811 &pr_reg
->pr_aptpl_buf
[0],
2812 pr_tmpl
->pr_aptpl_buf_len
);
2814 pr_debug("SPC-3 PR: Updated APTPL metadata for RELEASE\n");
2817 core_scsi3_put_pr_reg(pr_reg
);
2821 static int core_scsi3_emulate_pro_clear(
2825 struct se_device
*dev
= cmd
->se_dev
;
2826 struct se_node_acl
*pr_reg_nacl
;
2827 struct se_session
*se_sess
= cmd
->se_sess
;
2828 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
2829 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
, *pr_reg_n
, *pr_res_holder
;
2830 u32 pr_res_mapped_lun
= 0;
2831 int calling_it_nexus
= 0;
2833 * Locate the existing *pr_reg via struct se_node_acl pointers
2835 pr_reg_n
= core_scsi3_locate_pr_reg(cmd
->se_dev
,
2836 se_sess
->se_node_acl
, se_sess
);
2838 pr_err("SPC-3 PR: Unable to locate"
2839 " PR_REGISTERED *pr_reg for CLEAR\n");
2840 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
2844 * From spc4r17 section 5.7.11.6, Clearing:
2846 * Any application client may release the persistent reservation and
2847 * remove all registrations from a device server by issuing a
2848 * PERSISTENT RESERVE OUT command with CLEAR service action through a
2849 * registered I_T nexus with the following parameter:
2851 * a) RESERVATION KEY field set to the value of the reservation key
2852 * that is registered with the logical unit for the I_T nexus.
2854 if (res_key
!= pr_reg_n
->pr_res_key
) {
2855 pr_err("SPC-3 PR REGISTER: Received"
2856 " res_key: 0x%016Lx does not match"
2857 " existing SA REGISTER res_key:"
2858 " 0x%016Lx\n", res_key
, pr_reg_n
->pr_res_key
);
2859 core_scsi3_put_pr_reg(pr_reg_n
);
2860 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
2864 * a) Release the persistent reservation, if any;
2866 spin_lock(&dev
->dev_reservation_lock
);
2867 pr_res_holder
= dev
->dev_pr_res_holder
;
2868 if (pr_res_holder
) {
2869 struct se_node_acl
*pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
2870 __core_scsi3_complete_pro_release(dev
, pr_res_nacl
,
2873 spin_unlock(&dev
->dev_reservation_lock
);
2875 * b) Remove all registration(s) (see spc4r17 5.7.7);
2877 spin_lock(&pr_tmpl
->registration_lock
);
2878 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
2879 &pr_tmpl
->registration_list
, pr_reg_list
) {
2881 calling_it_nexus
= (pr_reg_n
== pr_reg
) ? 1 : 0;
2882 pr_reg_nacl
= pr_reg
->pr_reg_nacl
;
2883 pr_res_mapped_lun
= pr_reg
->pr_res_mapped_lun
;
2884 __core_scsi3_free_registration(dev
, pr_reg
, NULL
,
2887 * e) Establish a unit attention condition for the initiator
2888 * port associated with every registered I_T nexus other
2889 * than the I_T nexus on which the PERSISTENT RESERVE OUT
2890 * command with CLEAR service action was received, with the
2891 * additional sense code set to RESERVATIONS PREEMPTED.
2893 if (!calling_it_nexus
)
2894 core_scsi3_ua_allocate(pr_reg_nacl
, pr_res_mapped_lun
,
2895 0x2A, ASCQ_2AH_RESERVATIONS_PREEMPTED
);
2897 spin_unlock(&pr_tmpl
->registration_lock
);
2899 pr_debug("SPC-3 PR [%s] Service Action: CLEAR complete\n",
2900 cmd
->se_tfo
->get_fabric_name());
2902 if (pr_tmpl
->pr_aptpl_active
) {
2903 core_scsi3_update_and_write_aptpl(cmd
->se_dev
, NULL
, 0);
2904 pr_debug("SPC-3 PR: Updated APTPL metadata"
2908 core_scsi3_pr_generation(dev
);
2913 * Called with struct se_device->dev_reservation_lock held.
2915 static void __core_scsi3_complete_pro_preempt(
2916 struct se_device
*dev
,
2917 struct t10_pr_registration
*pr_reg
,
2918 struct list_head
*preempt_and_abort_list
,
2923 struct se_node_acl
*nacl
= pr_reg
->pr_reg_nacl
;
2924 struct target_core_fabric_ops
*tfo
= nacl
->se_tpg
->se_tpg_tfo
;
2925 char i_buf
[PR_REG_ISID_ID_LEN
];
2928 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
2929 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
2930 PR_REG_ISID_ID_LEN
);
2932 * Do an implict RELEASE of the existing reservation.
2934 if (dev
->dev_pr_res_holder
)
2935 __core_scsi3_complete_pro_release(dev
, nacl
,
2936 dev
->dev_pr_res_holder
, 0);
2938 dev
->dev_pr_res_holder
= pr_reg
;
2939 pr_reg
->pr_res_holder
= 1;
2940 pr_reg
->pr_res_type
= type
;
2941 pr_reg
->pr_res_scope
= scope
;
2943 pr_debug("SPC-3 PR [%s] Service Action: PREEMPT%s created new"
2944 " reservation holder TYPE: %s ALL_TG_PT: %d\n",
2945 tfo
->get_fabric_name(), (abort
) ? "_AND_ABORT" : "",
2946 core_scsi3_pr_dump_type(type
),
2947 (pr_reg
->pr_reg_all_tg_pt
) ? 1 : 0);
2948 pr_debug("SPC-3 PR [%s] PREEMPT%s from Node: %s%s\n",
2949 tfo
->get_fabric_name(), (abort
) ? "_AND_ABORT" : "",
2950 nacl
->initiatorname
, (prf_isid
) ? &i_buf
[0] : "");
2952 * For PREEMPT_AND_ABORT, add the preempting reservation's
2953 * struct t10_pr_registration to the list that will be compared
2954 * against received CDBs..
2956 if (preempt_and_abort_list
)
2957 list_add_tail(&pr_reg
->pr_reg_abort_list
,
2958 preempt_and_abort_list
);
2961 static void core_scsi3_release_preempt_and_abort(
2962 struct list_head
*preempt_and_abort_list
,
2963 struct t10_pr_registration
*pr_reg_holder
)
2965 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
;
2967 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
, preempt_and_abort_list
,
2968 pr_reg_abort_list
) {
2970 list_del(&pr_reg
->pr_reg_abort_list
);
2971 if (pr_reg_holder
== pr_reg
)
2973 if (pr_reg
->pr_res_holder
) {
2974 pr_warn("pr_reg->pr_res_holder still set\n");
2978 pr_reg
->pr_reg_deve
= NULL
;
2979 pr_reg
->pr_reg_nacl
= NULL
;
2980 kfree(pr_reg
->pr_aptpl_buf
);
2981 kmem_cache_free(t10_pr_reg_cache
, pr_reg
);
2985 static int core_scsi3_pro_preempt(
2993 struct se_device
*dev
= cmd
->se_dev
;
2994 struct se_dev_entry
*se_deve
;
2995 struct se_node_acl
*pr_reg_nacl
;
2996 struct se_session
*se_sess
= cmd
->se_sess
;
2997 struct list_head preempt_and_abort_list
;
2998 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
, *pr_reg_n
, *pr_res_holder
;
2999 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
3000 u32 pr_res_mapped_lun
= 0;
3001 int all_reg
= 0, calling_it_nexus
= 0, released_regs
= 0;
3002 int prh_type
= 0, prh_scope
= 0, ret
;
3005 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3009 se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
3010 pr_reg_n
= core_scsi3_locate_pr_reg(cmd
->se_dev
, se_sess
->se_node_acl
,
3013 pr_err("SPC-3 PR: Unable to locate"
3014 " PR_REGISTERED *pr_reg for PREEMPT%s\n",
3015 (abort
) ? "_AND_ABORT" : "");
3016 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3019 if (pr_reg_n
->pr_res_key
!= res_key
) {
3020 core_scsi3_put_pr_reg(pr_reg_n
);
3021 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3024 if (scope
!= PR_SCOPE_LU_SCOPE
) {
3025 pr_err("SPC-3 PR: Illegal SCOPE: 0x%02x\n", scope
);
3026 core_scsi3_put_pr_reg(pr_reg_n
);
3027 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3030 INIT_LIST_HEAD(&preempt_and_abort_list
);
3032 spin_lock(&dev
->dev_reservation_lock
);
3033 pr_res_holder
= dev
->dev_pr_res_holder
;
3034 if (pr_res_holder
&&
3035 ((pr_res_holder
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) ||
3036 (pr_res_holder
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
)))
3039 if (!all_reg
&& !sa_res_key
) {
3040 spin_unlock(&dev
->dev_reservation_lock
);
3041 core_scsi3_put_pr_reg(pr_reg_n
);
3042 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3046 * From spc4r17, section 5.7.11.4.4 Removing Registrations:
3048 * If the SERVICE ACTION RESERVATION KEY field does not identify a
3049 * persistent reservation holder or there is no persistent reservation
3050 * holder (i.e., there is no persistent reservation), then the device
3051 * server shall perform a preempt by doing the following in an
3052 * uninterrupted series of actions. (See below..)
3054 if (!pr_res_holder
|| (pr_res_holder
->pr_res_key
!= sa_res_key
)) {
3056 * No existing or SA Reservation Key matching reservations..
3058 * PROUT SA PREEMPT with All Registrant type reservations are
3059 * allowed to be processed without a matching SA Reservation Key
3061 spin_lock(&pr_tmpl
->registration_lock
);
3062 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
3063 &pr_tmpl
->registration_list
, pr_reg_list
) {
3065 * Removing of registrations in non all registrants
3066 * type reservations without a matching SA reservation
3069 * a) Remove the registrations for all I_T nexuses
3070 * specified by the SERVICE ACTION RESERVATION KEY
3072 * b) Ignore the contents of the SCOPE and TYPE fields;
3073 * c) Process tasks as defined in 5.7.1; and
3074 * d) Establish a unit attention condition for the
3075 * initiator port associated with every I_T nexus
3076 * that lost its registration other than the I_T
3077 * nexus on which the PERSISTENT RESERVE OUT command
3078 * was received, with the additional sense code set
3079 * to REGISTRATIONS PREEMPTED.
3082 if (pr_reg
->pr_res_key
!= sa_res_key
)
3085 calling_it_nexus
= (pr_reg_n
== pr_reg
) ? 1 : 0;
3086 pr_reg_nacl
= pr_reg
->pr_reg_nacl
;
3087 pr_res_mapped_lun
= pr_reg
->pr_res_mapped_lun
;
3088 __core_scsi3_free_registration(dev
, pr_reg
,
3089 (abort
) ? &preempt_and_abort_list
:
3090 NULL
, calling_it_nexus
);
3094 * Case for any existing all registrants type
3095 * reservation, follow logic in spc4r17 section
3096 * 5.7.11.4 Preempting, Table 52 and Figure 7.
3098 * For a ZERO SA Reservation key, release
3099 * all other registrations and do an implict
3100 * release of active persistent reservation.
3102 * For a non-ZERO SA Reservation key, only
3103 * release the matching reservation key from
3107 (pr_reg
->pr_res_key
!= sa_res_key
))
3110 calling_it_nexus
= (pr_reg_n
== pr_reg
) ? 1 : 0;
3111 if (calling_it_nexus
)
3114 pr_reg_nacl
= pr_reg
->pr_reg_nacl
;
3115 pr_res_mapped_lun
= pr_reg
->pr_res_mapped_lun
;
3116 __core_scsi3_free_registration(dev
, pr_reg
,
3117 (abort
) ? &preempt_and_abort_list
:
3121 if (!calling_it_nexus
)
3122 core_scsi3_ua_allocate(pr_reg_nacl
,
3123 pr_res_mapped_lun
, 0x2A,
3124 ASCQ_2AH_REGISTRATIONS_PREEMPTED
);
3126 spin_unlock(&pr_tmpl
->registration_lock
);
3128 * If a PERSISTENT RESERVE OUT with a PREEMPT service action or
3129 * a PREEMPT AND ABORT service action sets the SERVICE ACTION
3130 * RESERVATION KEY field to a value that does not match any
3131 * registered reservation key, then the device server shall
3132 * complete the command with RESERVATION CONFLICT status.
3134 if (!released_regs
) {
3135 spin_unlock(&dev
->dev_reservation_lock
);
3136 core_scsi3_put_pr_reg(pr_reg_n
);
3137 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3141 * For an existing all registrants type reservation
3142 * with a zero SA rservation key, preempt the existing
3143 * reservation with the new PR type and scope.
3145 if (pr_res_holder
&& all_reg
&& !(sa_res_key
)) {
3146 __core_scsi3_complete_pro_preempt(dev
, pr_reg_n
,
3147 (abort
) ? &preempt_and_abort_list
: NULL
,
3148 type
, scope
, abort
);
3151 core_scsi3_release_preempt_and_abort(
3152 &preempt_and_abort_list
, pr_reg_n
);
3154 spin_unlock(&dev
->dev_reservation_lock
);
3156 if (pr_tmpl
->pr_aptpl_active
) {
3157 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
3158 &pr_reg_n
->pr_aptpl_buf
[0],
3159 pr_tmpl
->pr_aptpl_buf_len
);
3161 pr_debug("SPC-3 PR: Updated APTPL"
3162 " metadata for PREEMPT%s\n", (abort
) ?
3166 core_scsi3_put_pr_reg(pr_reg_n
);
3167 core_scsi3_pr_generation(cmd
->se_dev
);
3171 * The PREEMPTing SA reservation key matches that of the
3172 * existing persistent reservation, first, we check if
3173 * we are preempting our own reservation.
3174 * From spc4r17, section 5.7.11.4.3 Preempting
3175 * persistent reservations and registration handling
3177 * If an all registrants persistent reservation is not
3178 * present, it is not an error for the persistent
3179 * reservation holder to preempt itself (i.e., a
3180 * PERSISTENT RESERVE OUT with a PREEMPT service action
3181 * or a PREEMPT AND ABORT service action with the
3182 * SERVICE ACTION RESERVATION KEY value equal to the
3183 * persistent reservation holder's reservation key that
3184 * is received from the persistent reservation holder).
3185 * In that case, the device server shall establish the
3186 * new persistent reservation and maintain the
3189 prh_type
= pr_res_holder
->pr_res_type
;
3190 prh_scope
= pr_res_holder
->pr_res_scope
;
3192 * If the SERVICE ACTION RESERVATION KEY field identifies a
3193 * persistent reservation holder (see 5.7.10), the device
3194 * server shall perform a preempt by doing the following as
3195 * an uninterrupted series of actions:
3197 * a) Release the persistent reservation for the holder
3198 * identified by the SERVICE ACTION RESERVATION KEY field;
3200 if (pr_reg_n
!= pr_res_holder
)
3201 __core_scsi3_complete_pro_release(dev
,
3202 pr_res_holder
->pr_reg_nacl
,
3203 dev
->dev_pr_res_holder
, 0);
3205 * b) Remove the registrations for all I_T nexuses identified
3206 * by the SERVICE ACTION RESERVATION KEY field, except the
3207 * I_T nexus that is being used for the PERSISTENT RESERVE
3208 * OUT command. If an all registrants persistent reservation
3209 * is present and the SERVICE ACTION RESERVATION KEY field
3210 * is set to zero, then all registrations shall be removed
3211 * except for that of the I_T nexus that is being used for
3212 * the PERSISTENT RESERVE OUT command;
3214 spin_lock(&pr_tmpl
->registration_lock
);
3215 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
3216 &pr_tmpl
->registration_list
, pr_reg_list
) {
3218 calling_it_nexus
= (pr_reg_n
== pr_reg
) ? 1 : 0;
3219 if (calling_it_nexus
)
3222 if (pr_reg
->pr_res_key
!= sa_res_key
)
3225 pr_reg_nacl
= pr_reg
->pr_reg_nacl
;
3226 pr_res_mapped_lun
= pr_reg
->pr_res_mapped_lun
;
3227 __core_scsi3_free_registration(dev
, pr_reg
,
3228 (abort
) ? &preempt_and_abort_list
: NULL
,
3231 * e) Establish a unit attention condition for the initiator
3232 * port associated with every I_T nexus that lost its
3233 * persistent reservation and/or registration, with the
3234 * additional sense code set to REGISTRATIONS PREEMPTED;
3236 core_scsi3_ua_allocate(pr_reg_nacl
, pr_res_mapped_lun
, 0x2A,
3237 ASCQ_2AH_REGISTRATIONS_PREEMPTED
);
3239 spin_unlock(&pr_tmpl
->registration_lock
);
3241 * c) Establish a persistent reservation for the preempting
3242 * I_T nexus using the contents of the SCOPE and TYPE fields;
3244 __core_scsi3_complete_pro_preempt(dev
, pr_reg_n
,
3245 (abort
) ? &preempt_and_abort_list
: NULL
,
3246 type
, scope
, abort
);
3248 * d) Process tasks as defined in 5.7.1;
3250 * f) If the type or scope has changed, then for every I_T nexus
3251 * whose reservation key was not removed, except for the I_T
3252 * nexus on which the PERSISTENT RESERVE OUT command was
3253 * received, the device server shall establish a unit
3254 * attention condition for the initiator port associated with
3255 * that I_T nexus, with the additional sense code set to
3256 * RESERVATIONS RELEASED. If the type or scope have not
3257 * changed, then no unit attention condition(s) shall be
3258 * established for this reason.
3260 if ((prh_type
!= type
) || (prh_scope
!= scope
)) {
3261 spin_lock(&pr_tmpl
->registration_lock
);
3262 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
3263 &pr_tmpl
->registration_list
, pr_reg_list
) {
3265 calling_it_nexus
= (pr_reg_n
== pr_reg
) ? 1 : 0;
3266 if (calling_it_nexus
)
3269 core_scsi3_ua_allocate(pr_reg
->pr_reg_nacl
,
3270 pr_reg
->pr_res_mapped_lun
, 0x2A,
3271 ASCQ_2AH_RESERVATIONS_RELEASED
);
3273 spin_unlock(&pr_tmpl
->registration_lock
);
3275 spin_unlock(&dev
->dev_reservation_lock
);
3277 * Call LUN_RESET logic upon list of struct t10_pr_registration,
3278 * All received CDBs for the matching existing reservation and
3279 * registrations undergo ABORT_TASK logic.
3281 * From there, core_scsi3_release_preempt_and_abort() will
3282 * release every registration in the list (which have already
3283 * been removed from the primary pr_reg list), except the
3284 * new persistent reservation holder, the calling Initiator Port.
3287 core_tmr_lun_reset(dev
, NULL
, &preempt_and_abort_list
, cmd
);
3288 core_scsi3_release_preempt_and_abort(&preempt_and_abort_list
,
3292 if (pr_tmpl
->pr_aptpl_active
) {
3293 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
3294 &pr_reg_n
->pr_aptpl_buf
[0],
3295 pr_tmpl
->pr_aptpl_buf_len
);
3297 pr_debug("SPC-3 PR: Updated APTPL metadata for PREEMPT"
3298 "%s\n", (abort
) ? "_AND_ABORT" : "");
3301 core_scsi3_put_pr_reg(pr_reg_n
);
3302 core_scsi3_pr_generation(cmd
->se_dev
);
3306 static int core_scsi3_emulate_pro_preempt(
3317 case PR_TYPE_WRITE_EXCLUSIVE
:
3318 case PR_TYPE_EXCLUSIVE_ACCESS
:
3319 case PR_TYPE_WRITE_EXCLUSIVE_REGONLY
:
3320 case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY
:
3321 case PR_TYPE_WRITE_EXCLUSIVE_ALLREG
:
3322 case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
:
3323 ret
= core_scsi3_pro_preempt(cmd
, type
, scope
,
3324 res_key
, sa_res_key
, abort
);
3327 pr_err("SPC-3 PR: Unknown Service Action PREEMPT%s"
3328 " Type: 0x%02x\n", (abort
) ? "_AND_ABORT" : "", type
);
3329 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
3337 static int core_scsi3_emulate_pro_register_and_move(
3344 struct se_session
*se_sess
= cmd
->se_sess
;
3345 struct se_device
*dev
= cmd
->se_dev
;
3346 struct se_dev_entry
*se_deve
, *dest_se_deve
= NULL
;
3347 struct se_lun
*se_lun
= cmd
->se_lun
;
3348 struct se_node_acl
*pr_res_nacl
, *pr_reg_nacl
, *dest_node_acl
= NULL
;
3349 struct se_port
*se_port
;
3350 struct se_portal_group
*se_tpg
, *dest_se_tpg
= NULL
;
3351 struct target_core_fabric_ops
*dest_tf_ops
= NULL
, *tf_ops
;
3352 struct t10_pr_registration
*pr_reg
, *pr_res_holder
, *dest_pr_reg
;
3353 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
3355 unsigned char *initiator_str
;
3356 char *iport_ptr
= NULL
, dest_iport
[64], i_buf
[PR_REG_ISID_ID_LEN
];
3357 u32 tid_len
, tmp_tid_len
;
3358 int new_reg
= 0, type
, scope
, ret
, matching_iname
, prf_isid
;
3359 unsigned short rtpi
;
3360 unsigned char proto_ident
;
3362 if (!se_sess
|| !se_lun
) {
3363 pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n");
3364 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3367 memset(dest_iport
, 0, 64);
3368 memset(i_buf
, 0, PR_REG_ISID_ID_LEN
);
3369 se_tpg
= se_sess
->se_tpg
;
3370 tf_ops
= se_tpg
->se_tpg_tfo
;
3371 se_deve
= &se_sess
->se_node_acl
->device_list
[cmd
->orig_fe_lun
];
3373 * Follow logic from spc4r17 Section 5.7.8, Table 50 --
3374 * Register behaviors for a REGISTER AND MOVE service action
3376 * Locate the existing *pr_reg via struct se_node_acl pointers
3378 pr_reg
= core_scsi3_locate_pr_reg(cmd
->se_dev
, se_sess
->se_node_acl
,
3381 pr_err("SPC-3 PR: Unable to locate PR_REGISTERED"
3382 " *pr_reg for REGISTER_AND_MOVE\n");
3383 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3387 * The provided reservation key much match the existing reservation key
3388 * provided during this initiator's I_T nexus registration.
3390 if (res_key
!= pr_reg
->pr_res_key
) {
3391 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received"
3392 " res_key: 0x%016Lx does not match existing SA REGISTER"
3393 " res_key: 0x%016Lx\n", res_key
, pr_reg
->pr_res_key
);
3394 core_scsi3_put_pr_reg(pr_reg
);
3395 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3399 * The service active reservation key needs to be non zero
3402 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Received zero"
3404 core_scsi3_put_pr_reg(pr_reg
);
3405 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3410 * Determine the Relative Target Port Identifier where the reservation
3411 * will be moved to for the TransportID containing SCSI initiator WWN
3414 buf
= transport_kmap_data_sg(cmd
);
3415 rtpi
= (buf
[18] & 0xff) << 8;
3416 rtpi
|= buf
[19] & 0xff;
3417 tid_len
= (buf
[20] & 0xff) << 24;
3418 tid_len
|= (buf
[21] & 0xff) << 16;
3419 tid_len
|= (buf
[22] & 0xff) << 8;
3420 tid_len
|= buf
[23] & 0xff;
3421 transport_kunmap_data_sg(cmd
);
3424 if ((tid_len
+ 24) != cmd
->data_length
) {
3425 pr_err("SPC-3 PR: Illegal tid_len: %u + 24 byte header"
3426 " does not equal CDB data_length: %u\n", tid_len
,
3428 core_scsi3_put_pr_reg(pr_reg
);
3429 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3433 spin_lock(&dev
->se_port_lock
);
3434 list_for_each_entry(se_port
, &dev
->dev_sep_list
, sep_list
) {
3435 if (se_port
->sep_rtpi
!= rtpi
)
3437 dest_se_tpg
= se_port
->sep_tpg
;
3440 dest_tf_ops
= dest_se_tpg
->se_tpg_tfo
;
3444 atomic_inc(&dest_se_tpg
->tpg_pr_ref_count
);
3445 smp_mb__after_atomic_inc();
3446 spin_unlock(&dev
->se_port_lock
);
3448 ret
= core_scsi3_tpg_depend_item(dest_se_tpg
);
3450 pr_err("core_scsi3_tpg_depend_item() failed"
3451 " for dest_se_tpg\n");
3452 atomic_dec(&dest_se_tpg
->tpg_pr_ref_count
);
3453 smp_mb__after_atomic_dec();
3454 core_scsi3_put_pr_reg(pr_reg
);
3455 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3459 spin_lock(&dev
->se_port_lock
);
3462 spin_unlock(&dev
->se_port_lock
);
3464 if (!dest_se_tpg
|| !dest_tf_ops
) {
3465 pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
3466 " fabric ops from Relative Target Port Identifier:"
3468 core_scsi3_put_pr_reg(pr_reg
);
3469 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3473 buf
= transport_kmap_data_sg(cmd
);
3474 proto_ident
= (buf
[24] & 0x0f);
3476 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Extracted Protocol Identifier:"
3477 " 0x%02x\n", proto_ident
);
3479 if (proto_ident
!= dest_tf_ops
->get_fabric_proto_ident(dest_se_tpg
)) {
3480 pr_err("SPC-3 PR REGISTER_AND_MOVE: Received"
3481 " proto_ident: 0x%02x does not match ident: 0x%02x"
3482 " from fabric: %s\n", proto_ident
,
3483 dest_tf_ops
->get_fabric_proto_ident(dest_se_tpg
),
3484 dest_tf_ops
->get_fabric_name());
3485 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3489 if (dest_tf_ops
->tpg_parse_pr_out_transport_id
== NULL
) {
3490 pr_err("SPC-3 PR REGISTER_AND_MOVE: Fabric does not"
3491 " containg a valid tpg_parse_pr_out_transport_id"
3492 " function pointer\n");
3493 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3497 initiator_str
= dest_tf_ops
->tpg_parse_pr_out_transport_id(dest_se_tpg
,
3498 (const char *)&buf
[24], &tmp_tid_len
, &iport_ptr
);
3499 if (!initiator_str
) {
3500 pr_err("SPC-3 PR REGISTER_AND_MOVE: Unable to locate"
3501 " initiator_str from Transport ID\n");
3502 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3507 transport_kunmap_data_sg(cmd
);
3510 pr_debug("SPC-3 PR [%s] Extracted initiator %s identifier: %s"
3511 " %s\n", dest_tf_ops
->get_fabric_name(), (iport_ptr
!= NULL
) ?
3512 "port" : "device", initiator_str
, (iport_ptr
!= NULL
) ?
3515 * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
3516 * action specifies a TransportID that is the same as the initiator port
3517 * of the I_T nexus for the command received, then the command shall
3518 * be terminated with CHECK CONDITION status, with the sense key set to
3519 * ILLEGAL REQUEST, and the additional sense code set to INVALID FIELD
3520 * IN PARAMETER LIST.
3522 pr_reg_nacl
= pr_reg
->pr_reg_nacl
;
3523 matching_iname
= (!strcmp(initiator_str
,
3524 pr_reg_nacl
->initiatorname
)) ? 1 : 0;
3525 if (!matching_iname
)
3526 goto after_iport_check
;
3528 if (!iport_ptr
|| !pr_reg
->isid_present_at_reg
) {
3529 pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s"
3530 " matches: %s on received I_T Nexus\n", initiator_str
,
3531 pr_reg_nacl
->initiatorname
);
3532 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3536 if (!strcmp(iport_ptr
, pr_reg
->pr_reg_isid
)) {
3537 pr_err("SPC-3 PR REGISTER_AND_MOVE: TransportID: %s %s"
3538 " matches: %s %s on received I_T Nexus\n",
3539 initiator_str
, iport_ptr
, pr_reg_nacl
->initiatorname
,
3540 pr_reg
->pr_reg_isid
);
3541 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3547 * Locate the destination struct se_node_acl from the received Transport ID
3549 spin_lock_irq(&dest_se_tpg
->acl_node_lock
);
3550 dest_node_acl
= __core_tpg_get_initiator_node_acl(dest_se_tpg
,
3552 if (dest_node_acl
) {
3553 atomic_inc(&dest_node_acl
->acl_pr_ref_count
);
3554 smp_mb__after_atomic_inc();
3556 spin_unlock_irq(&dest_se_tpg
->acl_node_lock
);
3558 if (!dest_node_acl
) {
3559 pr_err("Unable to locate %s dest_node_acl for"
3560 " TransportID%s\n", dest_tf_ops
->get_fabric_name(),
3562 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3566 ret
= core_scsi3_nodeacl_depend_item(dest_node_acl
);
3568 pr_err("core_scsi3_nodeacl_depend_item() for"
3569 " dest_node_acl\n");
3570 atomic_dec(&dest_node_acl
->acl_pr_ref_count
);
3571 smp_mb__after_atomic_dec();
3572 dest_node_acl
= NULL
;
3573 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3578 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Found %s dest_node_acl:"
3579 " %s from TransportID\n", dest_tf_ops
->get_fabric_name(),
3580 dest_node_acl
->initiatorname
);
3583 * Locate the struct se_dev_entry pointer for the matching RELATIVE TARGET
3586 dest_se_deve
= core_get_se_deve_from_rtpi(dest_node_acl
, rtpi
);
3587 if (!dest_se_deve
) {
3588 pr_err("Unable to locate %s dest_se_deve from RTPI:"
3589 " %hu\n", dest_tf_ops
->get_fabric_name(), rtpi
);
3590 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3595 ret
= core_scsi3_lunacl_depend_item(dest_se_deve
);
3597 pr_err("core_scsi3_lunacl_depend_item() failed\n");
3598 atomic_dec(&dest_se_deve
->pr_ref_count
);
3599 smp_mb__after_atomic_dec();
3600 dest_se_deve
= NULL
;
3601 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3606 pr_debug("SPC-3 PR REGISTER_AND_MOVE: Located %s node %s LUN"
3607 " ACL for dest_se_deve->mapped_lun: %u\n",
3608 dest_tf_ops
->get_fabric_name(), dest_node_acl
->initiatorname
,
3609 dest_se_deve
->mapped_lun
);
3612 * A persistent reservation needs to already existing in order to
3613 * successfully complete the REGISTER_AND_MOVE service action..
3615 spin_lock(&dev
->dev_reservation_lock
);
3616 pr_res_holder
= dev
->dev_pr_res_holder
;
3617 if (!pr_res_holder
) {
3618 pr_warn("SPC-3 PR REGISTER_AND_MOVE: No reservation"
3619 " currently held\n");
3620 spin_unlock(&dev
->dev_reservation_lock
);
3621 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
3626 * The received on I_T Nexus must be the reservation holder.
3628 * From spc4r17 section 5.7.8 Table 50 --
3629 * Register behaviors for a REGISTER AND MOVE service action
3631 if (pr_res_holder
!= pr_reg
) {
3632 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Calling I_T"
3633 " Nexus is not reservation holder\n");
3634 spin_unlock(&dev
->dev_reservation_lock
);
3635 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3640 * From spc4r17 section 5.7.8: registering and moving reservation
3642 * If a PERSISTENT RESERVE OUT command with a REGISTER AND MOVE service
3643 * action is received and the established persistent reservation is a
3644 * Write Exclusive - All Registrants type or Exclusive Access -
3645 * All Registrants type reservation, then the command shall be completed
3646 * with RESERVATION CONFLICT status.
3648 if ((pr_res_holder
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) ||
3649 (pr_res_holder
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
)) {
3650 pr_warn("SPC-3 PR REGISTER_AND_MOVE: Unable to move"
3651 " reservation for type: %s\n",
3652 core_scsi3_pr_dump_type(pr_res_holder
->pr_res_type
));
3653 spin_unlock(&dev
->dev_reservation_lock
);
3654 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3658 pr_res_nacl
= pr_res_holder
->pr_reg_nacl
;
3660 * b) Ignore the contents of the (received) SCOPE and TYPE fields;
3662 type
= pr_res_holder
->pr_res_type
;
3663 scope
= pr_res_holder
->pr_res_type
;
3665 * c) Associate the reservation key specified in the SERVICE ACTION
3666 * RESERVATION KEY field with the I_T nexus specified as the
3667 * destination of the register and move, where:
3668 * A) The I_T nexus is specified by the TransportID and the
3669 * RELATIVE TARGET PORT IDENTIFIER field (see 6.14.4); and
3670 * B) Regardless of the TransportID format used, the association for
3671 * the initiator port is based on either the initiator port name
3672 * (see 3.1.71) on SCSI transport protocols where port names are
3673 * required or the initiator port identifier (see 3.1.70) on SCSI
3674 * transport protocols where port names are not required;
3675 * d) Register the reservation key specified in the SERVICE ACTION
3676 * RESERVATION KEY field;
3677 * e) Retain the reservation key specified in the SERVICE ACTION
3678 * RESERVATION KEY field and associated information;
3680 * Also, It is not an error for a REGISTER AND MOVE service action to
3681 * register an I_T nexus that is already registered with the same
3682 * reservation key or a different reservation key.
3684 dest_pr_reg
= __core_scsi3_locate_pr_reg(dev
, dest_node_acl
,
3687 ret
= core_scsi3_alloc_registration(cmd
->se_dev
,
3688 dest_node_acl
, dest_se_deve
, iport_ptr
,
3689 sa_res_key
, 0, aptpl
, 2, 1);
3691 spin_unlock(&dev
->dev_reservation_lock
);
3692 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3696 dest_pr_reg
= __core_scsi3_locate_pr_reg(dev
, dest_node_acl
,
3701 * f) Release the persistent reservation for the persistent reservation
3702 * holder (i.e., the I_T nexus on which the
3704 __core_scsi3_complete_pro_release(dev
, pr_res_nacl
,
3705 dev
->dev_pr_res_holder
, 0);
3707 * g) Move the persistent reservation to the specified I_T nexus using
3708 * the same scope and type as the persistent reservation released in
3711 dev
->dev_pr_res_holder
= dest_pr_reg
;
3712 dest_pr_reg
->pr_res_holder
= 1;
3713 dest_pr_reg
->pr_res_type
= type
;
3714 pr_reg
->pr_res_scope
= scope
;
3715 prf_isid
= core_pr_dump_initiator_port(pr_reg
, &i_buf
[0],
3716 PR_REG_ISID_ID_LEN
);
3718 * Increment PRGeneration for existing registrations..
3721 dest_pr_reg
->pr_res_generation
= pr_tmpl
->pr_generation
++;
3722 spin_unlock(&dev
->dev_reservation_lock
);
3724 pr_debug("SPC-3 PR [%s] Service Action: REGISTER_AND_MOVE"
3725 " created new reservation holder TYPE: %s on object RTPI:"
3726 " %hu PRGeneration: 0x%08x\n", dest_tf_ops
->get_fabric_name(),
3727 core_scsi3_pr_dump_type(type
), rtpi
,
3728 dest_pr_reg
->pr_res_generation
);
3729 pr_debug("SPC-3 PR Successfully moved reservation from"
3730 " %s Fabric Node: %s%s -> %s Fabric Node: %s %s\n",
3731 tf_ops
->get_fabric_name(), pr_reg_nacl
->initiatorname
,
3732 (prf_isid
) ? &i_buf
[0] : "", dest_tf_ops
->get_fabric_name(),
3733 dest_node_acl
->initiatorname
, (iport_ptr
!= NULL
) ?
3736 * It is now safe to release configfs group dependencies for destination
3737 * of Transport ID Initiator Device/Port Identifier
3739 core_scsi3_lunacl_undepend_item(dest_se_deve
);
3740 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
3741 core_scsi3_tpg_undepend_item(dest_se_tpg
);
3743 * h) If the UNREG bit is set to one, unregister (see 5.7.11.3) the I_T
3744 * nexus on which PERSISTENT RESERVE OUT command was received.
3747 spin_lock(&pr_tmpl
->registration_lock
);
3748 __core_scsi3_free_registration(dev
, pr_reg
, NULL
, 1);
3749 spin_unlock(&pr_tmpl
->registration_lock
);
3751 core_scsi3_put_pr_reg(pr_reg
);
3754 * Clear the APTPL metadata if APTPL has been disabled, otherwise
3755 * write out the updated metadata to struct file for this SCSI device.
3758 pr_tmpl
->pr_aptpl_active
= 0;
3759 core_scsi3_update_and_write_aptpl(cmd
->se_dev
, NULL
, 0);
3760 pr_debug("SPC-3 PR: Set APTPL Bit Deactivated for"
3761 " REGISTER_AND_MOVE\n");
3763 pr_tmpl
->pr_aptpl_active
= 1;
3764 ret
= core_scsi3_update_and_write_aptpl(cmd
->se_dev
,
3765 &dest_pr_reg
->pr_aptpl_buf
[0],
3766 pr_tmpl
->pr_aptpl_buf_len
);
3768 pr_debug("SPC-3 PR: Set APTPL Bit Activated for"
3769 " REGISTER_AND_MOVE\n");
3772 transport_kunmap_data_sg(cmd
);
3774 core_scsi3_put_pr_reg(dest_pr_reg
);
3778 transport_kunmap_data_sg(cmd
);
3780 core_scsi3_lunacl_undepend_item(dest_se_deve
);
3782 core_scsi3_nodeacl_undepend_item(dest_node_acl
);
3783 core_scsi3_tpg_undepend_item(dest_se_tpg
);
3784 core_scsi3_put_pr_reg(pr_reg
);
3788 static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb
)
3790 unsigned int __v1
, __v2
;
3792 __v1
= (cdb
[0] << 24) | (cdb
[1] << 16) | (cdb
[2] << 8) | cdb
[3];
3793 __v2
= (cdb
[4] << 24) | (cdb
[5] << 16) | (cdb
[6] << 8) | cdb
[7];
3795 return ((unsigned long long)__v2
) | (unsigned long long)__v1
<< 32;
3799 * See spc4r17 section 6.14 Table 170
3801 int target_scsi3_emulate_pr_out(struct se_task
*task
)
3803 struct se_cmd
*cmd
= task
->task_se_cmd
;
3804 unsigned char *cdb
= &cmd
->t_task_cdb
[0];
3806 u64 res_key
, sa_res_key
;
3807 int sa
, scope
, type
, aptpl
;
3808 int spec_i_pt
= 0, all_tg_pt
= 0, unreg
= 0;
3812 * Following spc2r20 5.5.1 Reservations overview:
3814 * If a logical unit has been reserved by any RESERVE command and is
3815 * still reserved by any initiator, all PERSISTENT RESERVE IN and all
3816 * PERSISTENT RESERVE OUT commands shall conflict regardless of
3817 * initiator or service action and shall terminate with a RESERVATION
3820 if (cmd
->se_dev
->dev_flags
& DF_SPC2_RESERVATIONS
) {
3821 pr_err("Received PERSISTENT_RESERVE CDB while legacy"
3822 " SPC-2 reservation is held, returning"
3823 " RESERVATION_CONFLICT\n");
3824 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
3830 * FIXME: A NULL struct se_session pointer means an this is not coming from
3831 * a $FABRIC_MOD's nexus, but from internal passthrough ops.
3833 if (!cmd
->se_sess
) {
3834 cmd
->scsi_sense_reason
= TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE
;
3838 if (cmd
->data_length
< 24) {
3839 pr_warn("SPC-PR: Received PR OUT parameter list"
3840 " length too small: %u\n", cmd
->data_length
);
3841 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3846 * From the PERSISTENT_RESERVE_OUT command descriptor block (CDB)
3848 sa
= (cdb
[1] & 0x1f);
3849 scope
= (cdb
[2] & 0xf0);
3850 type
= (cdb
[2] & 0x0f);
3852 buf
= transport_kmap_data_sg(cmd
);
3854 * From PERSISTENT_RESERVE_OUT parameter list (payload)
3856 res_key
= core_scsi3_extract_reservation_key(&buf
[0]);
3857 sa_res_key
= core_scsi3_extract_reservation_key(&buf
[8]);
3859 * REGISTER_AND_MOVE uses a different SA parameter list containing
3860 * SCSI TransportIDs.
3862 if (sa
!= PRO_REGISTER_AND_MOVE
) {
3863 spec_i_pt
= (buf
[20] & 0x08);
3864 all_tg_pt
= (buf
[20] & 0x04);
3865 aptpl
= (buf
[20] & 0x01);
3867 aptpl
= (buf
[17] & 0x01);
3868 unreg
= (buf
[17] & 0x02);
3870 transport_kunmap_data_sg(cmd
);
3874 * SPEC_I_PT=1 is only valid for Service action: REGISTER
3876 if (spec_i_pt
&& ((cdb
[1] & 0x1f) != PRO_REGISTER
)) {
3877 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3883 * From spc4r17 section 6.14:
3885 * If the SPEC_I_PT bit is set to zero, the service action is not
3886 * REGISTER AND MOVE, and the parameter list length is not 24, then
3887 * the command shall be terminated with CHECK CONDITION status, with
3888 * the sense key set to ILLEGAL REQUEST, and the additional sense
3889 * code set to PARAMETER LIST LENGTH ERROR.
3891 if (!spec_i_pt
&& ((cdb
[1] & 0x1f) != PRO_REGISTER_AND_MOVE
) &&
3892 (cmd
->data_length
!= 24)) {
3893 pr_warn("SPC-PR: Received PR OUT illegal parameter"
3894 " list length: %u\n", cmd
->data_length
);
3895 cmd
->scsi_sense_reason
= TCM_INVALID_PARAMETER_LIST
;
3900 * (core_scsi3_emulate_pro_* function parameters
3901 * are defined by spc4r17 Table 174:
3902 * PERSISTENT_RESERVE_OUT service actions and valid parameters.
3906 ret
= core_scsi3_emulate_pro_register(cmd
,
3907 res_key
, sa_res_key
, aptpl
, all_tg_pt
, spec_i_pt
, 0);
3910 ret
= core_scsi3_emulate_pro_reserve(cmd
, type
, scope
, res_key
);
3913 ret
= core_scsi3_emulate_pro_release(cmd
, type
, scope
, res_key
);
3916 ret
= core_scsi3_emulate_pro_clear(cmd
, res_key
);
3919 ret
= core_scsi3_emulate_pro_preempt(cmd
, type
, scope
,
3920 res_key
, sa_res_key
, 0);
3922 case PRO_PREEMPT_AND_ABORT
:
3923 ret
= core_scsi3_emulate_pro_preempt(cmd
, type
, scope
,
3924 res_key
, sa_res_key
, 1);
3926 case PRO_REGISTER_AND_IGNORE_EXISTING_KEY
:
3927 ret
= core_scsi3_emulate_pro_register(cmd
,
3928 0, sa_res_key
, aptpl
, all_tg_pt
, spec_i_pt
, 1);
3930 case PRO_REGISTER_AND_MOVE
:
3931 ret
= core_scsi3_emulate_pro_register_and_move(cmd
, res_key
,
3932 sa_res_key
, aptpl
, unreg
);
3935 pr_err("Unknown PERSISTENT_RESERVE_OUT service"
3936 " action: 0x%02x\n", cdb
[1] & 0x1f);
3937 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
3944 task
->task_scsi_status
= GOOD
;
3945 transport_complete_task(task
, 1);
3951 * PERSISTENT_RESERVE_IN Service Action READ_KEYS
3953 * See spc4r17 section 5.7.6.2 and section 6.13.2, Table 160
3955 static int core_scsi3_pri_read_keys(struct se_cmd
*cmd
)
3957 struct se_device
*se_dev
= cmd
->se_dev
;
3958 struct se_subsystem_dev
*su_dev
= se_dev
->se_sub_dev
;
3959 struct t10_pr_registration
*pr_reg
;
3961 u32 add_len
= 0, off
= 8;
3963 if (cmd
->data_length
< 8) {
3964 pr_err("PRIN SA READ_KEYS SCSI Data Length: %u"
3965 " too small\n", cmd
->data_length
);
3966 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
3970 buf
= transport_kmap_data_sg(cmd
);
3971 buf
[0] = ((su_dev
->t10_pr
.pr_generation
>> 24) & 0xff);
3972 buf
[1] = ((su_dev
->t10_pr
.pr_generation
>> 16) & 0xff);
3973 buf
[2] = ((su_dev
->t10_pr
.pr_generation
>> 8) & 0xff);
3974 buf
[3] = (su_dev
->t10_pr
.pr_generation
& 0xff);
3976 spin_lock(&su_dev
->t10_pr
.registration_lock
);
3977 list_for_each_entry(pr_reg
, &su_dev
->t10_pr
.registration_list
,
3980 * Check for overflow of 8byte PRI READ_KEYS payload and
3981 * next reservation key list descriptor.
3983 if ((add_len
+ 8) > (cmd
->data_length
- 8))
3986 buf
[off
++] = ((pr_reg
->pr_res_key
>> 56) & 0xff);
3987 buf
[off
++] = ((pr_reg
->pr_res_key
>> 48) & 0xff);
3988 buf
[off
++] = ((pr_reg
->pr_res_key
>> 40) & 0xff);
3989 buf
[off
++] = ((pr_reg
->pr_res_key
>> 32) & 0xff);
3990 buf
[off
++] = ((pr_reg
->pr_res_key
>> 24) & 0xff);
3991 buf
[off
++] = ((pr_reg
->pr_res_key
>> 16) & 0xff);
3992 buf
[off
++] = ((pr_reg
->pr_res_key
>> 8) & 0xff);
3993 buf
[off
++] = (pr_reg
->pr_res_key
& 0xff);
3997 spin_unlock(&su_dev
->t10_pr
.registration_lock
);
3999 buf
[4] = ((add_len
>> 24) & 0xff);
4000 buf
[5] = ((add_len
>> 16) & 0xff);
4001 buf
[6] = ((add_len
>> 8) & 0xff);
4002 buf
[7] = (add_len
& 0xff);
4004 transport_kunmap_data_sg(cmd
);
4010 * PERSISTENT_RESERVE_IN Service Action READ_RESERVATION
4012 * See spc4r17 section 5.7.6.3 and section 6.13.3.2 Table 161 and 162
4014 static int core_scsi3_pri_read_reservation(struct se_cmd
*cmd
)
4016 struct se_device
*se_dev
= cmd
->se_dev
;
4017 struct se_subsystem_dev
*su_dev
= se_dev
->se_sub_dev
;
4018 struct t10_pr_registration
*pr_reg
;
4021 u32 add_len
= 16; /* Hardcoded to 16 when a reservation is held. */
4023 if (cmd
->data_length
< 8) {
4024 pr_err("PRIN SA READ_RESERVATIONS SCSI Data Length: %u"
4025 " too small\n", cmd
->data_length
);
4026 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
4030 buf
= transport_kmap_data_sg(cmd
);
4031 buf
[0] = ((su_dev
->t10_pr
.pr_generation
>> 24) & 0xff);
4032 buf
[1] = ((su_dev
->t10_pr
.pr_generation
>> 16) & 0xff);
4033 buf
[2] = ((su_dev
->t10_pr
.pr_generation
>> 8) & 0xff);
4034 buf
[3] = (su_dev
->t10_pr
.pr_generation
& 0xff);
4036 spin_lock(&se_dev
->dev_reservation_lock
);
4037 pr_reg
= se_dev
->dev_pr_res_holder
;
4040 * Set the hardcoded Additional Length
4042 buf
[4] = ((add_len
>> 24) & 0xff);
4043 buf
[5] = ((add_len
>> 16) & 0xff);
4044 buf
[6] = ((add_len
>> 8) & 0xff);
4045 buf
[7] = (add_len
& 0xff);
4047 if (cmd
->data_length
< 22)
4051 * Set the Reservation key.
4053 * From spc4r17, section 5.7.10:
4054 * A persistent reservation holder has its reservation key
4055 * returned in the parameter data from a PERSISTENT
4056 * RESERVE IN command with READ RESERVATION service action as
4058 * a) For a persistent reservation of the type Write Exclusive
4059 * - All Registrants or Exclusive Access  All Regitrants,
4060 * the reservation key shall be set to zero; or
4061 * b) For all other persistent reservation types, the
4062 * reservation key shall be set to the registered
4063 * reservation key for the I_T nexus that holds the
4064 * persistent reservation.
4066 if ((pr_reg
->pr_res_type
== PR_TYPE_WRITE_EXCLUSIVE_ALLREG
) ||
4067 (pr_reg
->pr_res_type
== PR_TYPE_EXCLUSIVE_ACCESS_ALLREG
))
4070 pr_res_key
= pr_reg
->pr_res_key
;
4072 buf
[8] = ((pr_res_key
>> 56) & 0xff);
4073 buf
[9] = ((pr_res_key
>> 48) & 0xff);
4074 buf
[10] = ((pr_res_key
>> 40) & 0xff);
4075 buf
[11] = ((pr_res_key
>> 32) & 0xff);
4076 buf
[12] = ((pr_res_key
>> 24) & 0xff);
4077 buf
[13] = ((pr_res_key
>> 16) & 0xff);
4078 buf
[14] = ((pr_res_key
>> 8) & 0xff);
4079 buf
[15] = (pr_res_key
& 0xff);
4081 * Set the SCOPE and TYPE
4083 buf
[21] = (pr_reg
->pr_res_scope
& 0xf0) |
4084 (pr_reg
->pr_res_type
& 0x0f);
4088 spin_unlock(&se_dev
->dev_reservation_lock
);
4089 transport_kunmap_data_sg(cmd
);
4095 * PERSISTENT_RESERVE_IN Service Action REPORT_CAPABILITIES
4097 * See spc4r17 section 6.13.4 Table 165
4099 static int core_scsi3_pri_report_capabilities(struct se_cmd
*cmd
)
4101 struct se_device
*dev
= cmd
->se_dev
;
4102 struct t10_reservation
*pr_tmpl
= &dev
->se_sub_dev
->t10_pr
;
4104 u16 add_len
= 8; /* Hardcoded to 8. */
4106 if (cmd
->data_length
< 6) {
4107 pr_err("PRIN SA REPORT_CAPABILITIES SCSI Data Length:"
4108 " %u too small\n", cmd
->data_length
);
4109 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
4113 buf
= transport_kmap_data_sg(cmd
);
4115 buf
[0] = ((add_len
<< 8) & 0xff);
4116 buf
[1] = (add_len
& 0xff);
4117 buf
[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */
4118 buf
[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */
4119 buf
[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */
4120 buf
[2] |= 0x01; /* PTPL_C: Persistence across Target Power Loss bit */
4122 * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so
4123 * set the TMV: Task Mask Valid bit.
4127 * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166
4129 buf
[3] |= 0x10; /* ALLOW COMMANDs field 001b */
4131 * PTPL_A: Persistence across Target Power Loss Active bit
4133 if (pr_tmpl
->pr_aptpl_active
)
4136 * Setup the PERSISTENT RESERVATION TYPE MASK from Table 167
4138 buf
[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
4139 buf
[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */
4140 buf
[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */
4141 buf
[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */
4142 buf
[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */
4143 buf
[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */
4145 transport_kunmap_data_sg(cmd
);
4151 * PERSISTENT_RESERVE_IN Service Action READ_FULL_STATUS
4153 * See spc4r17 section 6.13.5 Table 168 and 169
4155 static int core_scsi3_pri_read_full_status(struct se_cmd
*cmd
)
4157 struct se_device
*se_dev
= cmd
->se_dev
;
4158 struct se_node_acl
*se_nacl
;
4159 struct se_subsystem_dev
*su_dev
= se_dev
->se_sub_dev
;
4160 struct se_portal_group
*se_tpg
;
4161 struct t10_pr_registration
*pr_reg
, *pr_reg_tmp
;
4162 struct t10_reservation
*pr_tmpl
= &se_dev
->se_sub_dev
->t10_pr
;
4164 u32 add_desc_len
= 0, add_len
= 0, desc_len
, exp_desc_len
;
4165 u32 off
= 8; /* off into first Full Status descriptor */
4166 int format_code
= 0;
4168 if (cmd
->data_length
< 8) {
4169 pr_err("PRIN SA READ_FULL_STATUS SCSI Data Length: %u"
4170 " too small\n", cmd
->data_length
);
4171 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
4175 buf
= transport_kmap_data_sg(cmd
);
4177 buf
[0] = ((su_dev
->t10_pr
.pr_generation
>> 24) & 0xff);
4178 buf
[1] = ((su_dev
->t10_pr
.pr_generation
>> 16) & 0xff);
4179 buf
[2] = ((su_dev
->t10_pr
.pr_generation
>> 8) & 0xff);
4180 buf
[3] = (su_dev
->t10_pr
.pr_generation
& 0xff);
4182 spin_lock(&pr_tmpl
->registration_lock
);
4183 list_for_each_entry_safe(pr_reg
, pr_reg_tmp
,
4184 &pr_tmpl
->registration_list
, pr_reg_list
) {
4186 se_nacl
= pr_reg
->pr_reg_nacl
;
4187 se_tpg
= pr_reg
->pr_reg_nacl
->se_tpg
;
4190 atomic_inc(&pr_reg
->pr_res_holders
);
4191 smp_mb__after_atomic_inc();
4192 spin_unlock(&pr_tmpl
->registration_lock
);
4194 * Determine expected length of $FABRIC_MOD specific
4195 * TransportID full status descriptor..
4197 exp_desc_len
= se_tpg
->se_tpg_tfo
->tpg_get_pr_transport_id_len(
4198 se_tpg
, se_nacl
, pr_reg
, &format_code
);
4200 if ((exp_desc_len
+ add_len
) > cmd
->data_length
) {
4201 pr_warn("SPC-3 PRIN READ_FULL_STATUS ran"
4202 " out of buffer: %d\n", cmd
->data_length
);
4203 spin_lock(&pr_tmpl
->registration_lock
);
4204 atomic_dec(&pr_reg
->pr_res_holders
);
4205 smp_mb__after_atomic_dec();
4209 * Set RESERVATION KEY
4211 buf
[off
++] = ((pr_reg
->pr_res_key
>> 56) & 0xff);
4212 buf
[off
++] = ((pr_reg
->pr_res_key
>> 48) & 0xff);
4213 buf
[off
++] = ((pr_reg
->pr_res_key
>> 40) & 0xff);
4214 buf
[off
++] = ((pr_reg
->pr_res_key
>> 32) & 0xff);
4215 buf
[off
++] = ((pr_reg
->pr_res_key
>> 24) & 0xff);
4216 buf
[off
++] = ((pr_reg
->pr_res_key
>> 16) & 0xff);
4217 buf
[off
++] = ((pr_reg
->pr_res_key
>> 8) & 0xff);
4218 buf
[off
++] = (pr_reg
->pr_res_key
& 0xff);
4219 off
+= 4; /* Skip Over Reserved area */
4222 * Set ALL_TG_PT bit if PROUT SA REGISTER had this set.
4224 if (pr_reg
->pr_reg_all_tg_pt
)
4227 * The struct se_lun pointer will be present for the
4228 * reservation holder for PR_HOLDER bit.
4230 * Also, if this registration is the reservation
4231 * holder, fill in SCOPE and TYPE in the next byte.
4233 if (pr_reg
->pr_res_holder
) {
4235 buf
[off
++] = (pr_reg
->pr_res_scope
& 0xf0) |
4236 (pr_reg
->pr_res_type
& 0x0f);
4240 off
+= 4; /* Skip over reserved area */
4242 * From spc4r17 6.3.15:
4244 * If the ALL_TG_PT bit set to zero, the RELATIVE TARGET PORT
4245 * IDENTIFIER field contains the relative port identifier (see
4246 * 3.1.120) of the target port that is part of the I_T nexus
4247 * described by this full status descriptor. If the ALL_TG_PT
4248 * bit is set to one, the contents of the RELATIVE TARGET PORT
4249 * IDENTIFIER field are not defined by this standard.
4251 if (!pr_reg
->pr_reg_all_tg_pt
) {
4252 struct se_port
*port
= pr_reg
->pr_reg_tg_pt_lun
->lun_sep
;
4254 buf
[off
++] = ((port
->sep_rtpi
>> 8) & 0xff);
4255 buf
[off
++] = (port
->sep_rtpi
& 0xff);
4257 off
+= 2; /* Skip over RELATIVE TARGET PORT IDENTIFER */
4260 * Now, have the $FABRIC_MOD fill in the protocol identifier
4262 desc_len
= se_tpg
->se_tpg_tfo
->tpg_get_pr_transport_id(se_tpg
,
4263 se_nacl
, pr_reg
, &format_code
, &buf
[off
+4]);
4265 spin_lock(&pr_tmpl
->registration_lock
);
4266 atomic_dec(&pr_reg
->pr_res_holders
);
4267 smp_mb__after_atomic_dec();
4269 * Set the ADDITIONAL DESCRIPTOR LENGTH
4271 buf
[off
++] = ((desc_len
>> 24) & 0xff);
4272 buf
[off
++] = ((desc_len
>> 16) & 0xff);
4273 buf
[off
++] = ((desc_len
>> 8) & 0xff);
4274 buf
[off
++] = (desc_len
& 0xff);
4276 * Size of full desctipor header minus TransportID
4277 * containing $FABRIC_MOD specific) initiator device/port
4280 * See spc4r17 Section 6.13.5 Table 169
4282 add_desc_len
= (24 + desc_len
);
4285 add_len
+= add_desc_len
;
4287 spin_unlock(&pr_tmpl
->registration_lock
);
4289 * Set ADDITIONAL_LENGTH
4291 buf
[4] = ((add_len
>> 24) & 0xff);
4292 buf
[5] = ((add_len
>> 16) & 0xff);
4293 buf
[6] = ((add_len
>> 8) & 0xff);
4294 buf
[7] = (add_len
& 0xff);
4296 transport_kunmap_data_sg(cmd
);
4301 int target_scsi3_emulate_pr_in(struct se_task
*task
)
4303 struct se_cmd
*cmd
= task
->task_se_cmd
;
4307 * Following spc2r20 5.5.1 Reservations overview:
4309 * If a logical unit has been reserved by any RESERVE command and is
4310 * still reserved by any initiator, all PERSISTENT RESERVE IN and all
4311 * PERSISTENT RESERVE OUT commands shall conflict regardless of
4312 * initiator or service action and shall terminate with a RESERVATION
4315 if (cmd
->se_dev
->dev_flags
& DF_SPC2_RESERVATIONS
) {
4316 pr_err("Received PERSISTENT_RESERVE CDB while legacy"
4317 " SPC-2 reservation is held, returning"
4318 " RESERVATION_CONFLICT\n");
4319 cmd
->scsi_sense_reason
= TCM_RESERVATION_CONFLICT
;
4323 switch (cmd
->t_task_cdb
[1] & 0x1f) {
4325 ret
= core_scsi3_pri_read_keys(cmd
);
4327 case PRI_READ_RESERVATION
:
4328 ret
= core_scsi3_pri_read_reservation(cmd
);
4330 case PRI_REPORT_CAPABILITIES
:
4331 ret
= core_scsi3_pri_report_capabilities(cmd
);
4333 case PRI_READ_FULL_STATUS
:
4334 ret
= core_scsi3_pri_read_full_status(cmd
);
4337 pr_err("Unknown PERSISTENT_RESERVE_IN service"
4338 " action: 0x%02x\n", cmd
->t_task_cdb
[1] & 0x1f);
4339 cmd
->scsi_sense_reason
= TCM_INVALID_CDB_FIELD
;
4345 task
->task_scsi_status
= GOOD
;
4346 transport_complete_task(task
, 1);
4351 static int core_pt_reservation_check(struct se_cmd
*cmd
, u32
*pr_res_type
)
4356 static int core_pt_seq_non_holder(
4364 int core_setup_reservations(struct se_device
*dev
, int force_pt
)
4366 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
4367 struct t10_reservation
*rest
= &su_dev
->t10_pr
;
4369 * If this device is from Target_Core_Mod/pSCSI, use the reservations
4370 * of the Underlying SCSI hardware. In Linux/SCSI terms, this can
4371 * cause a problem because libata and some SATA RAID HBAs appear
4372 * under Linux/SCSI, but to emulate reservations themselves.
4374 if (((dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) &&
4375 !(dev
->se_sub_dev
->se_dev_attrib
.emulate_reservations
)) || force_pt
) {
4376 rest
->res_type
= SPC_PASSTHROUGH
;
4377 rest
->pr_ops
.t10_reservation_check
= &core_pt_reservation_check
;
4378 rest
->pr_ops
.t10_seq_non_holder
= &core_pt_seq_non_holder
;
4379 pr_debug("%s: Using SPC_PASSTHROUGH, no reservation"
4380 " emulation\n", dev
->transport
->name
);
4384 * If SPC-3 or above is reported by real or emulated struct se_device,
4385 * use emulated Persistent Reservations.
4387 if (dev
->transport
->get_device_rev(dev
) >= SCSI_3
) {
4388 rest
->res_type
= SPC3_PERSISTENT_RESERVATIONS
;
4389 rest
->pr_ops
.t10_reservation_check
= &core_scsi3_pr_reservation_check
;
4390 rest
->pr_ops
.t10_seq_non_holder
= &core_scsi3_pr_seq_non_holder
;
4391 pr_debug("%s: Using SPC3_PERSISTENT_RESERVATIONS"
4392 " emulation\n", dev
->transport
->name
);
4394 rest
->res_type
= SPC2_RESERVATIONS
;
4395 rest
->pr_ops
.t10_reservation_check
= &core_scsi2_reservation_check
;
4396 rest
->pr_ops
.t10_seq_non_holder
=
4397 &core_scsi2_reservation_seq_non_holder
;
4398 pr_debug("%s: Using SPC2_RESERVATIONS emulation\n",
4399 dev
->transport
->name
);