1 /*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
4 * This file contains the TCM Virtual Device and Disk Transport
5 * agnostic related functions.
7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
9 * Copyright (c) 2007-2010 Rising Tide Systems
10 * Copyright (c) 2008-2010 Linux-iSCSI.org
12 * Nicholas A. Bellinger <nab@kernel.org>
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
28 ******************************************************************************/
30 #include <linux/net.h>
31 #include <linux/string.h>
32 #include <linux/delay.h>
33 #include <linux/timer.h>
34 #include <linux/slab.h>
35 #include <linux/spinlock.h>
36 #include <linux/kthread.h>
38 #include <linux/export.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_device.h>
44 #include <target/target_core_base.h>
45 #include <target/target_core_backend.h>
46 #include <target/target_core_fabric.h>
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_ua.h"
53 static void se_dev_start(struct se_device
*dev
);
54 static void se_dev_stop(struct se_device
*dev
);
56 static struct se_hba
*lun0_hba
;
57 static struct se_subsystem_dev
*lun0_su_dev
;
58 /* not static, needed by tpg.c */
59 struct se_device
*g_lun0_dev
;
61 int transport_lookup_cmd_lun(struct se_cmd
*se_cmd
, u32 unpacked_lun
)
63 struct se_lun
*se_lun
= NULL
;
64 struct se_session
*se_sess
= se_cmd
->se_sess
;
65 struct se_device
*dev
;
68 if (unpacked_lun
>= TRANSPORT_MAX_LUNS_PER_TPG
) {
69 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
70 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
74 spin_lock_irqsave(&se_sess
->se_node_acl
->device_list_lock
, flags
);
75 se_cmd
->se_deve
= se_sess
->se_node_acl
->device_list
[unpacked_lun
];
76 if (se_cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
77 struct se_dev_entry
*deve
= se_cmd
->se_deve
;
80 deve
->total_bytes
+= se_cmd
->data_length
;
82 if ((se_cmd
->data_direction
== DMA_TO_DEVICE
) &&
83 (deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)) {
84 se_cmd
->scsi_sense_reason
= TCM_WRITE_PROTECTED
;
85 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
86 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
87 " Access for 0x%08x\n",
88 se_cmd
->se_tfo
->get_fabric_name(),
90 spin_unlock_irqrestore(&se_sess
->se_node_acl
->device_list_lock
, flags
);
94 if (se_cmd
->data_direction
== DMA_TO_DEVICE
)
95 deve
->write_bytes
+= se_cmd
->data_length
;
96 else if (se_cmd
->data_direction
== DMA_FROM_DEVICE
)
97 deve
->read_bytes
+= se_cmd
->data_length
;
101 se_lun
= deve
->se_lun
;
102 se_cmd
->se_lun
= deve
->se_lun
;
103 se_cmd
->pr_res_key
= deve
->pr_res_key
;
104 se_cmd
->orig_fe_lun
= unpacked_lun
;
105 se_cmd
->se_cmd_flags
|= SCF_SE_LUN_CMD
;
107 spin_unlock_irqrestore(&se_sess
->se_node_acl
->device_list_lock
, flags
);
111 * Use the se_portal_group->tpg_virt_lun0 to allow for
112 * REPORT_LUNS, et al to be returned when no active
113 * MappedLUN=0 exists for this Initiator Port.
115 if (unpacked_lun
!= 0) {
116 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
117 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
118 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
119 " Access for 0x%08x\n",
120 se_cmd
->se_tfo
->get_fabric_name(),
125 * Force WRITE PROTECT for virtual LUN 0
127 if ((se_cmd
->data_direction
!= DMA_FROM_DEVICE
) &&
128 (se_cmd
->data_direction
!= DMA_NONE
)) {
129 se_cmd
->scsi_sense_reason
= TCM_WRITE_PROTECTED
;
130 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
134 se_lun
= &se_sess
->se_tpg
->tpg_virt_lun0
;
135 se_cmd
->se_lun
= &se_sess
->se_tpg
->tpg_virt_lun0
;
136 se_cmd
->orig_fe_lun
= 0;
137 se_cmd
->se_cmd_flags
|= SCF_SE_LUN_CMD
;
140 * Determine if the struct se_lun is online.
141 * FIXME: Check for LUN_RESET + UNIT Attention
143 if (se_dev_check_online(se_lun
->lun_se_dev
) != 0) {
144 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
145 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
149 /* Directly associate cmd with se_dev */
150 se_cmd
->se_dev
= se_lun
->lun_se_dev
;
152 /* TODO: get rid of this and use atomics for stats */
153 dev
= se_lun
->lun_se_dev
;
154 spin_lock_irqsave(&dev
->stats_lock
, flags
);
156 if (se_cmd
->data_direction
== DMA_TO_DEVICE
)
157 dev
->write_bytes
+= se_cmd
->data_length
;
158 else if (se_cmd
->data_direction
== DMA_FROM_DEVICE
)
159 dev
->read_bytes
+= se_cmd
->data_length
;
160 spin_unlock_irqrestore(&dev
->stats_lock
, flags
);
162 spin_lock_irqsave(&se_lun
->lun_cmd_lock
, flags
);
163 list_add_tail(&se_cmd
->se_lun_node
, &se_lun
->lun_cmd_list
);
164 spin_unlock_irqrestore(&se_lun
->lun_cmd_lock
, flags
);
168 EXPORT_SYMBOL(transport_lookup_cmd_lun
);
170 int transport_lookup_tmr_lun(struct se_cmd
*se_cmd
, u32 unpacked_lun
)
172 struct se_dev_entry
*deve
;
173 struct se_lun
*se_lun
= NULL
;
174 struct se_session
*se_sess
= se_cmd
->se_sess
;
175 struct se_tmr_req
*se_tmr
= se_cmd
->se_tmr_req
;
178 if (unpacked_lun
>= TRANSPORT_MAX_LUNS_PER_TPG
) {
179 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
180 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
184 spin_lock_irqsave(&se_sess
->se_node_acl
->device_list_lock
, flags
);
185 se_cmd
->se_deve
= se_sess
->se_node_acl
->device_list
[unpacked_lun
];
186 deve
= se_cmd
->se_deve
;
188 if (deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
189 se_tmr
->tmr_lun
= deve
->se_lun
;
190 se_cmd
->se_lun
= deve
->se_lun
;
191 se_lun
= deve
->se_lun
;
192 se_cmd
->pr_res_key
= deve
->pr_res_key
;
193 se_cmd
->orig_fe_lun
= unpacked_lun
;
195 spin_unlock_irqrestore(&se_sess
->se_node_acl
->device_list_lock
, flags
);
198 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
199 " Access for 0x%08x\n",
200 se_cmd
->se_tfo
->get_fabric_name(),
202 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
206 * Determine if the struct se_lun is online.
207 * FIXME: Check for LUN_RESET + UNIT Attention
209 if (se_dev_check_online(se_lun
->lun_se_dev
) != 0) {
210 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
214 /* Directly associate cmd with se_dev */
215 se_cmd
->se_dev
= se_lun
->lun_se_dev
;
216 se_tmr
->tmr_dev
= se_lun
->lun_se_dev
;
218 spin_lock_irqsave(&se_tmr
->tmr_dev
->se_tmr_lock
, flags
);
219 list_add_tail(&se_tmr
->tmr_list
, &se_tmr
->tmr_dev
->dev_tmr_list
);
220 spin_unlock_irqrestore(&se_tmr
->tmr_dev
->se_tmr_lock
, flags
);
224 EXPORT_SYMBOL(transport_lookup_tmr_lun
);
227 * This function is called from core_scsi3_emulate_pro_register_and_move()
228 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
229 * when a matching rtpi is found.
231 struct se_dev_entry
*core_get_se_deve_from_rtpi(
232 struct se_node_acl
*nacl
,
235 struct se_dev_entry
*deve
;
237 struct se_port
*port
;
238 struct se_portal_group
*tpg
= nacl
->se_tpg
;
241 spin_lock_irq(&nacl
->device_list_lock
);
242 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
243 deve
= nacl
->device_list
[i
];
245 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
250 pr_err("%s device entries device pointer is"
251 " NULL, but Initiator has access.\n",
252 tpg
->se_tpg_tfo
->get_fabric_name());
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg
->se_tpg_tfo
->get_fabric_name());
262 if (port
->sep_rtpi
!= rtpi
)
265 atomic_inc(&deve
->pr_ref_count
);
266 smp_mb__after_atomic_inc();
267 spin_unlock_irq(&nacl
->device_list_lock
);
271 spin_unlock_irq(&nacl
->device_list_lock
);
276 int core_free_device_list_for_node(
277 struct se_node_acl
*nacl
,
278 struct se_portal_group
*tpg
)
280 struct se_dev_entry
*deve
;
284 if (!nacl
->device_list
)
287 spin_lock_irq(&nacl
->device_list_lock
);
288 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
289 deve
= nacl
->device_list
[i
];
291 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
295 pr_err("%s device entries device pointer is"
296 " NULL, but Initiator has access.\n",
297 tpg
->se_tpg_tfo
->get_fabric_name());
302 spin_unlock_irq(&nacl
->device_list_lock
);
303 core_update_device_list_for_node(lun
, NULL
, deve
->mapped_lun
,
304 TRANSPORT_LUNFLAGS_NO_ACCESS
, nacl
, tpg
, 0);
305 spin_lock_irq(&nacl
->device_list_lock
);
307 spin_unlock_irq(&nacl
->device_list_lock
);
309 array_free(nacl
->device_list
, TRANSPORT_MAX_LUNS_PER_TPG
);
310 nacl
->device_list
= NULL
;
315 void core_dec_lacl_count(struct se_node_acl
*se_nacl
, struct se_cmd
*se_cmd
)
317 struct se_dev_entry
*deve
;
320 spin_lock_irqsave(&se_nacl
->device_list_lock
, flags
);
321 deve
= se_nacl
->device_list
[se_cmd
->orig_fe_lun
];
323 spin_unlock_irqrestore(&se_nacl
->device_list_lock
, flags
);
326 void core_update_device_list_access(
329 struct se_node_acl
*nacl
)
331 struct se_dev_entry
*deve
;
333 spin_lock_irq(&nacl
->device_list_lock
);
334 deve
= nacl
->device_list
[mapped_lun
];
335 if (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) {
336 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_ONLY
;
337 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_WRITE
;
339 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_WRITE
;
340 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_ONLY
;
342 spin_unlock_irq(&nacl
->device_list_lock
);
345 /* core_update_device_list_for_node():
349 int core_update_device_list_for_node(
351 struct se_lun_acl
*lun_acl
,
354 struct se_node_acl
*nacl
,
355 struct se_portal_group
*tpg
,
358 struct se_port
*port
= lun
->lun_sep
;
359 struct se_dev_entry
*deve
= nacl
->device_list
[mapped_lun
];
362 * If the MappedLUN entry is being disabled, the entry in
363 * port->sep_alua_list must be removed now before clearing the
364 * struct se_dev_entry pointers below as logic in
365 * core_alua_do_transition_tg_pt() depends on these being present.
369 * deve->se_lun_acl will be NULL for demo-mode created LUNs
370 * that have not been explicitly concerted to MappedLUNs ->
371 * struct se_lun_acl, but we remove deve->alua_port_list from
372 * port->sep_alua_list. This also means that active UAs and
373 * NodeACL context specific PR metadata for demo-mode
374 * MappedLUN *deve will be released below..
376 spin_lock_bh(&port
->sep_alua_lock
);
377 list_del(&deve
->alua_port_list
);
378 spin_unlock_bh(&port
->sep_alua_lock
);
381 spin_lock_irq(&nacl
->device_list_lock
);
384 * Check if the call is handling demo mode -> explict LUN ACL
385 * transition. This transition must be for the same struct se_lun
386 * + mapped_lun that was setup in demo mode..
388 if (deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
389 if (deve
->se_lun_acl
!= NULL
) {
390 pr_err("struct se_dev_entry->se_lun_acl"
391 " already set for demo mode -> explict"
392 " LUN ACL transition\n");
393 spin_unlock_irq(&nacl
->device_list_lock
);
396 if (deve
->se_lun
!= lun
) {
397 pr_err("struct se_dev_entry->se_lun does"
398 " match passed struct se_lun for demo mode"
399 " -> explict LUN ACL transition\n");
400 spin_unlock_irq(&nacl
->device_list_lock
);
403 deve
->se_lun_acl
= lun_acl
;
407 deve
->se_lun_acl
= lun_acl
;
408 deve
->mapped_lun
= mapped_lun
;
409 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
;
412 if (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) {
413 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_ONLY
;
414 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_WRITE
;
416 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_WRITE
;
417 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_ONLY
;
421 spin_unlock_irq(&nacl
->device_list_lock
);
424 deve
->creation_time
= get_jiffies_64();
425 deve
->attach_count
++;
426 spin_unlock_irq(&nacl
->device_list_lock
);
428 spin_lock_bh(&port
->sep_alua_lock
);
429 list_add_tail(&deve
->alua_port_list
, &port
->sep_alua_list
);
430 spin_unlock_bh(&port
->sep_alua_lock
);
435 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
436 * PR operation to complete.
438 spin_unlock_irq(&nacl
->device_list_lock
);
439 while (atomic_read(&deve
->pr_ref_count
) != 0)
441 spin_lock_irq(&nacl
->device_list_lock
);
443 * Disable struct se_dev_entry LUN ACL mapping
445 core_scsi3_ua_release_all(deve
);
447 deve
->se_lun_acl
= NULL
;
449 deve
->creation_time
= 0;
450 deve
->attach_count
--;
451 spin_unlock_irq(&nacl
->device_list_lock
);
453 core_scsi3_free_pr_reg_from_nacl(lun
->lun_se_dev
, nacl
);
457 /* core_clear_lun_from_tpg():
461 void core_clear_lun_from_tpg(struct se_lun
*lun
, struct se_portal_group
*tpg
)
463 struct se_node_acl
*nacl
;
464 struct se_dev_entry
*deve
;
467 spin_lock_irq(&tpg
->acl_node_lock
);
468 list_for_each_entry(nacl
, &tpg
->acl_node_list
, acl_list
) {
469 spin_unlock_irq(&tpg
->acl_node_lock
);
471 spin_lock_irq(&nacl
->device_list_lock
);
472 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
473 deve
= nacl
->device_list
[i
];
474 if (lun
!= deve
->se_lun
)
476 spin_unlock_irq(&nacl
->device_list_lock
);
478 core_update_device_list_for_node(lun
, NULL
,
479 deve
->mapped_lun
, TRANSPORT_LUNFLAGS_NO_ACCESS
,
482 spin_lock_irq(&nacl
->device_list_lock
);
484 spin_unlock_irq(&nacl
->device_list_lock
);
486 spin_lock_irq(&tpg
->acl_node_lock
);
488 spin_unlock_irq(&tpg
->acl_node_lock
);
491 static struct se_port
*core_alloc_port(struct se_device
*dev
)
493 struct se_port
*port
, *port_tmp
;
495 port
= kzalloc(sizeof(struct se_port
), GFP_KERNEL
);
497 pr_err("Unable to allocate struct se_port\n");
498 return ERR_PTR(-ENOMEM
);
500 INIT_LIST_HEAD(&port
->sep_alua_list
);
501 INIT_LIST_HEAD(&port
->sep_list
);
502 atomic_set(&port
->sep_tg_pt_secondary_offline
, 0);
503 spin_lock_init(&port
->sep_alua_lock
);
504 mutex_init(&port
->sep_tg_pt_md_mutex
);
506 spin_lock(&dev
->se_port_lock
);
507 if (dev
->dev_port_count
== 0x0000ffff) {
508 pr_warn("Reached dev->dev_port_count =="
510 spin_unlock(&dev
->se_port_lock
);
511 return ERR_PTR(-ENOSPC
);
515 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
516 * Here is the table from spc4r17 section 7.7.3.8.
518 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
522 * 1h Relative port 1, historically known as port A
523 * 2h Relative port 2, historically known as port B
524 * 3h to FFFFh Relative port 3 through 65 535
526 port
->sep_rtpi
= dev
->dev_rpti_counter
++;
530 list_for_each_entry(port_tmp
, &dev
->dev_sep_list
, sep_list
) {
532 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
535 if (port
->sep_rtpi
== port_tmp
->sep_rtpi
)
538 spin_unlock(&dev
->se_port_lock
);
543 static void core_export_port(
544 struct se_device
*dev
,
545 struct se_portal_group
*tpg
,
546 struct se_port
*port
,
549 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
550 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
= NULL
;
552 spin_lock(&dev
->se_port_lock
);
553 spin_lock(&lun
->lun_sep_lock
);
557 spin_unlock(&lun
->lun_sep_lock
);
559 list_add_tail(&port
->sep_list
, &dev
->dev_sep_list
);
560 spin_unlock(&dev
->se_port_lock
);
562 if (su_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
) {
563 tg_pt_gp_mem
= core_alua_allocate_tg_pt_gp_mem(port
);
564 if (IS_ERR(tg_pt_gp_mem
) || !tg_pt_gp_mem
) {
565 pr_err("Unable to allocate t10_alua_tg_pt"
569 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
570 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem
,
571 su_dev
->t10_alua
.default_tg_pt_gp
);
572 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
573 pr_debug("%s/%s: Adding to default ALUA Target Port"
574 " Group: alua/default_tg_pt_gp\n",
575 dev
->transport
->name
, tpg
->se_tpg_tfo
->get_fabric_name());
578 dev
->dev_port_count
++;
579 port
->sep_index
= port
->sep_rtpi
; /* RELATIVE TARGET PORT IDENTIFER */
583 * Called with struct se_device->se_port_lock spinlock held.
585 static void core_release_port(struct se_device
*dev
, struct se_port
*port
)
586 __releases(&dev
->se_port_lock
) __acquires(&dev
->se_port_lock
)
589 * Wait for any port reference for PR ALL_TG_PT=1 operation
590 * to complete in __core_scsi3_alloc_registration()
592 spin_unlock(&dev
->se_port_lock
);
593 if (atomic_read(&port
->sep_tg_pt_ref_cnt
))
595 spin_lock(&dev
->se_port_lock
);
597 core_alua_free_tg_pt_gp_mem(port
);
599 list_del(&port
->sep_list
);
600 dev
->dev_port_count
--;
605 struct se_device
*dev
,
606 struct se_portal_group
*tpg
,
609 struct se_port
*port
;
611 port
= core_alloc_port(dev
);
613 return PTR_ERR(port
);
615 lun
->lun_se_dev
= dev
;
618 atomic_inc(&dev
->dev_export_obj
.obj_access_count
);
619 core_export_port(dev
, tpg
, port
, lun
);
623 void core_dev_unexport(
624 struct se_device
*dev
,
625 struct se_portal_group
*tpg
,
628 struct se_port
*port
= lun
->lun_sep
;
630 spin_lock(&lun
->lun_sep_lock
);
631 if (lun
->lun_se_dev
== NULL
) {
632 spin_unlock(&lun
->lun_sep_lock
);
635 spin_unlock(&lun
->lun_sep_lock
);
637 spin_lock(&dev
->se_port_lock
);
638 atomic_dec(&dev
->dev_export_obj
.obj_access_count
);
639 core_release_port(dev
, port
);
640 spin_unlock(&dev
->se_port_lock
);
643 lun
->lun_se_dev
= NULL
;
646 int target_report_luns(struct se_task
*se_task
)
648 struct se_cmd
*se_cmd
= se_task
->task_se_cmd
;
649 struct se_dev_entry
*deve
;
650 struct se_session
*se_sess
= se_cmd
->se_sess
;
652 u32 lun_count
= 0, offset
= 8, i
;
654 buf
= transport_kmap_data_sg(se_cmd
);
659 * If no struct se_session pointer is present, this struct se_cmd is
660 * coming via a target_core_mod PASSTHROUGH op, and not through
661 * a $FABRIC_MOD. In that case, report LUN=0 only.
664 int_to_scsilun(0, (struct scsi_lun
*)&buf
[offset
]);
669 spin_lock_irq(&se_sess
->se_node_acl
->device_list_lock
);
670 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
671 deve
= se_sess
->se_node_acl
->device_list
[i
];
672 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
675 * We determine the correct LUN LIST LENGTH even once we
676 * have reached the initial allocation length.
680 if ((offset
+ 8) > se_cmd
->data_length
)
683 int_to_scsilun(deve
->mapped_lun
, (struct scsi_lun
*)&buf
[offset
]);
686 spin_unlock_irq(&se_sess
->se_node_acl
->device_list_lock
);
689 * See SPC3 r07, page 159.
693 buf
[0] = ((lun_count
>> 24) & 0xff);
694 buf
[1] = ((lun_count
>> 16) & 0xff);
695 buf
[2] = ((lun_count
>> 8) & 0xff);
696 buf
[3] = (lun_count
& 0xff);
697 transport_kunmap_data_sg(se_cmd
);
699 se_task
->task_scsi_status
= GOOD
;
700 transport_complete_task(se_task
, 1);
704 /* se_release_device_for_hba():
708 void se_release_device_for_hba(struct se_device
*dev
)
710 struct se_hba
*hba
= dev
->se_hba
;
712 if ((dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) ||
713 (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
) ||
714 (dev
->dev_status
& TRANSPORT_DEVICE_SHUTDOWN
) ||
715 (dev
->dev_status
& TRANSPORT_DEVICE_OFFLINE_ACTIVATED
) ||
716 (dev
->dev_status
& TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
))
720 kthread_stop(dev
->process_thread
);
721 if (dev
->transport
->free_device
)
722 dev
->transport
->free_device(dev
->dev_ptr
);
725 spin_lock(&hba
->device_lock
);
726 list_del(&dev
->dev_list
);
728 spin_unlock(&hba
->device_lock
);
730 core_scsi3_free_all_registrations(dev
);
731 se_release_vpd_for_dev(dev
);
736 void se_release_vpd_for_dev(struct se_device
*dev
)
738 struct t10_vpd
*vpd
, *vpd_tmp
;
740 spin_lock(&dev
->se_sub_dev
->t10_wwn
.t10_vpd_lock
);
741 list_for_each_entry_safe(vpd
, vpd_tmp
,
742 &dev
->se_sub_dev
->t10_wwn
.t10_vpd_list
, vpd_list
) {
743 list_del(&vpd
->vpd_list
);
746 spin_unlock(&dev
->se_sub_dev
->t10_wwn
.t10_vpd_lock
);
749 /* se_free_virtual_device():
751 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
753 int se_free_virtual_device(struct se_device
*dev
, struct se_hba
*hba
)
755 if (!list_empty(&dev
->dev_sep_list
))
758 core_alua_free_lu_gp_mem(dev
);
759 se_release_device_for_hba(dev
);
764 static void se_dev_start(struct se_device
*dev
)
766 struct se_hba
*hba
= dev
->se_hba
;
768 spin_lock(&hba
->device_lock
);
769 atomic_inc(&dev
->dev_obj
.obj_access_count
);
770 if (atomic_read(&dev
->dev_obj
.obj_access_count
) == 1) {
771 if (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
) {
772 dev
->dev_status
&= ~TRANSPORT_DEVICE_DEACTIVATED
;
773 dev
->dev_status
|= TRANSPORT_DEVICE_ACTIVATED
;
774 } else if (dev
->dev_status
&
775 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
) {
777 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
;
778 dev
->dev_status
|= TRANSPORT_DEVICE_OFFLINE_ACTIVATED
;
781 spin_unlock(&hba
->device_lock
);
784 static void se_dev_stop(struct se_device
*dev
)
786 struct se_hba
*hba
= dev
->se_hba
;
788 spin_lock(&hba
->device_lock
);
789 atomic_dec(&dev
->dev_obj
.obj_access_count
);
790 if (atomic_read(&dev
->dev_obj
.obj_access_count
) == 0) {
791 if (dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) {
792 dev
->dev_status
&= ~TRANSPORT_DEVICE_ACTIVATED
;
793 dev
->dev_status
|= TRANSPORT_DEVICE_DEACTIVATED
;
794 } else if (dev
->dev_status
&
795 TRANSPORT_DEVICE_OFFLINE_ACTIVATED
) {
796 dev
->dev_status
&= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED
;
797 dev
->dev_status
|= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
;
800 spin_unlock(&hba
->device_lock
);
803 int se_dev_check_online(struct se_device
*dev
)
808 spin_lock_irqsave(&dev
->dev_status_lock
, flags
);
809 ret
= ((dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) ||
810 (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
)) ? 0 : 1;
811 spin_unlock_irqrestore(&dev
->dev_status_lock
, flags
);
816 int se_dev_check_shutdown(struct se_device
*dev
)
820 spin_lock_irq(&dev
->dev_status_lock
);
821 ret
= (dev
->dev_status
& TRANSPORT_DEVICE_SHUTDOWN
);
822 spin_unlock_irq(&dev
->dev_status_lock
);
827 u32
se_dev_align_max_sectors(u32 max_sectors
, u32 block_size
)
829 u32 aligned_max_sectors
;
832 * Limit max_sectors to a PAGE_SIZE aligned value for modern
833 * transport_allocate_data_tasks() operation.
835 alignment
= max(1ul, PAGE_SIZE
/ block_size
);
836 aligned_max_sectors
= rounddown(max_sectors
, alignment
);
838 if (max_sectors
!= aligned_max_sectors
)
839 pr_info("Rounding down aligned max_sectors from %u to %u\n",
840 max_sectors
, aligned_max_sectors
);
842 return aligned_max_sectors
;
845 void se_dev_set_default_attribs(
846 struct se_device
*dev
,
847 struct se_dev_limits
*dev_limits
)
849 struct queue_limits
*limits
= &dev_limits
->limits
;
851 dev
->se_sub_dev
->se_dev_attrib
.emulate_dpo
= DA_EMULATE_DPO
;
852 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
= DA_EMULATE_FUA_WRITE
;
853 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_read
= DA_EMULATE_FUA_READ
;
854 dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
= DA_EMULATE_WRITE_CACHE
;
855 dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
= DA_EMULATE_UA_INTLLCK_CTRL
;
856 dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
= DA_EMULATE_TAS
;
857 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
= DA_EMULATE_TPU
;
858 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
= DA_EMULATE_TPWS
;
859 dev
->se_sub_dev
->se_dev_attrib
.emulate_reservations
= DA_EMULATE_RESERVATIONS
;
860 dev
->se_sub_dev
->se_dev_attrib
.emulate_alua
= DA_EMULATE_ALUA
;
861 dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
= DA_ENFORCE_PR_ISIDS
;
862 dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
= DA_IS_NONROT
;
863 dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
= DA_EMULATE_REST_REORD
;
865 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
866 * iblock_create_virtdevice() from struct queue_limits values
867 * if blk_queue_discard()==1
869 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
= DA_MAX_UNMAP_LBA_COUNT
;
870 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
=
871 DA_MAX_UNMAP_BLOCK_DESC_COUNT
;
872 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
= DA_UNMAP_GRANULARITY_DEFAULT
;
873 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
=
874 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT
;
876 * block_size is based on subsystem plugin dependent requirements.
878 dev
->se_sub_dev
->se_dev_attrib
.hw_block_size
= limits
->logical_block_size
;
879 dev
->se_sub_dev
->se_dev_attrib
.block_size
= limits
->logical_block_size
;
881 * max_sectors is based on subsystem plugin dependent requirements.
883 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
= limits
->max_hw_sectors
;
885 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
887 limits
->max_sectors
= se_dev_align_max_sectors(limits
->max_sectors
,
888 limits
->logical_block_size
);
889 dev
->se_sub_dev
->se_dev_attrib
.max_sectors
= limits
->max_sectors
;
891 * Set fabric_max_sectors, which is reported in block limits
894 dev
->se_sub_dev
->se_dev_attrib
.fabric_max_sectors
= DA_FABRIC_MAX_SECTORS
;
896 * Set optimal_sectors from fabric_max_sectors, which can be
897 * lowered via configfs.
899 dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
= DA_FABRIC_MAX_SECTORS
;
901 * queue_depth is based on subsystem plugin dependent requirements.
903 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
= dev_limits
->hw_queue_depth
;
904 dev
->se_sub_dev
->se_dev_attrib
.queue_depth
= dev_limits
->queue_depth
;
907 int se_dev_set_max_unmap_lba_count(
908 struct se_device
*dev
,
909 u32 max_unmap_lba_count
)
911 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
= max_unmap_lba_count
;
912 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
913 dev
, dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
);
917 int se_dev_set_max_unmap_block_desc_count(
918 struct se_device
*dev
,
919 u32 max_unmap_block_desc_count
)
921 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
=
922 max_unmap_block_desc_count
;
923 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
924 dev
, dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
);
928 int se_dev_set_unmap_granularity(
929 struct se_device
*dev
,
930 u32 unmap_granularity
)
932 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
= unmap_granularity
;
933 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
934 dev
, dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
);
938 int se_dev_set_unmap_granularity_alignment(
939 struct se_device
*dev
,
940 u32 unmap_granularity_alignment
)
942 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
= unmap_granularity_alignment
;
943 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
944 dev
, dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
);
948 int se_dev_set_emulate_dpo(struct se_device
*dev
, int flag
)
950 if (flag
!= 0 && flag
!= 1) {
951 pr_err("Illegal value %d\n", flag
);
956 pr_err("dpo_emulated not supported\n");
963 int se_dev_set_emulate_fua_write(struct se_device
*dev
, int flag
)
965 if (flag
!= 0 && flag
!= 1) {
966 pr_err("Illegal value %d\n", flag
);
970 if (flag
&& dev
->transport
->fua_write_emulated
== 0) {
971 pr_err("fua_write_emulated not supported\n");
974 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
= flag
;
975 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
976 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
);
980 int se_dev_set_emulate_fua_read(struct se_device
*dev
, int flag
)
982 if (flag
!= 0 && flag
!= 1) {
983 pr_err("Illegal value %d\n", flag
);
988 pr_err("ua read emulated not supported\n");
995 int se_dev_set_emulate_write_cache(struct se_device
*dev
, int flag
)
997 if (flag
!= 0 && flag
!= 1) {
998 pr_err("Illegal value %d\n", flag
);
1001 if (flag
&& dev
->transport
->write_cache_emulated
== 0) {
1002 pr_err("write_cache_emulated not supported\n");
1005 dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
= flag
;
1006 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1007 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
);
1011 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device
*dev
, int flag
)
1013 if ((flag
!= 0) && (flag
!= 1) && (flag
!= 2)) {
1014 pr_err("Illegal value %d\n", flag
);
1018 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1019 pr_err("dev[%p]: Unable to change SE Device"
1020 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1022 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1025 dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
= flag
;
1026 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1027 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
);
1032 int se_dev_set_emulate_tas(struct se_device
*dev
, int flag
)
1034 if ((flag
!= 0) && (flag
!= 1)) {
1035 pr_err("Illegal value %d\n", flag
);
1039 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1040 pr_err("dev[%p]: Unable to change SE Device TAS while"
1041 " dev_export_obj: %d count exists\n", dev
,
1042 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1045 dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
= flag
;
1046 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1047 dev
, (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? "Enabled" : "Disabled");
1052 int se_dev_set_emulate_tpu(struct se_device
*dev
, int flag
)
1054 if ((flag
!= 0) && (flag
!= 1)) {
1055 pr_err("Illegal value %d\n", flag
);
1059 * We expect this value to be non-zero when generic Block Layer
1060 * Discard supported is detected iblock_create_virtdevice().
1062 if (flag
&& !dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
) {
1063 pr_err("Generic Block Discard not supported\n");
1067 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
= flag
;
1068 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1073 int se_dev_set_emulate_tpws(struct se_device
*dev
, int flag
)
1075 if ((flag
!= 0) && (flag
!= 1)) {
1076 pr_err("Illegal value %d\n", flag
);
1080 * We expect this value to be non-zero when generic Block Layer
1081 * Discard supported is detected iblock_create_virtdevice().
1083 if (flag
&& !dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
) {
1084 pr_err("Generic Block Discard not supported\n");
1088 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
= flag
;
1089 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1094 int se_dev_set_enforce_pr_isids(struct se_device
*dev
, int flag
)
1096 if ((flag
!= 0) && (flag
!= 1)) {
1097 pr_err("Illegal value %d\n", flag
);
1100 dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
= flag
;
1101 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev
,
1102 (dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
) ? "Enabled" : "Disabled");
1106 int se_dev_set_is_nonrot(struct se_device
*dev
, int flag
)
1108 if ((flag
!= 0) && (flag
!= 1)) {
1109 printk(KERN_ERR
"Illegal value %d\n", flag
);
1112 dev
->se_sub_dev
->se_dev_attrib
.is_nonrot
= flag
;
1113 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1118 int se_dev_set_emulate_rest_reord(struct se_device
*dev
, int flag
)
1121 printk(KERN_ERR
"dev[%p]: SE Device emulatation of restricted"
1122 " reordering not implemented\n", dev
);
1125 dev
->se_sub_dev
->se_dev_attrib
.emulate_rest_reord
= flag
;
1126 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev
, flag
);
1131 * Note, this can only be called on unexported SE Device Object.
1133 int se_dev_set_queue_depth(struct se_device
*dev
, u32 queue_depth
)
1135 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1136 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1137 " dev_export_obj: %d count exists\n", dev
,
1138 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1142 pr_err("dev[%p]: Illegal ZERO value for queue"
1147 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1148 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
) {
1149 pr_err("dev[%p]: Passed queue_depth: %u"
1150 " exceeds TCM/SE_Device TCQ: %u\n",
1152 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
);
1156 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.queue_depth
) {
1157 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
) {
1158 pr_err("dev[%p]: Passed queue_depth:"
1159 " %u exceeds TCM/SE_Device MAX"
1160 " TCQ: %u\n", dev
, queue_depth
,
1161 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
);
1167 dev
->se_sub_dev
->se_dev_attrib
.queue_depth
= dev
->queue_depth
= queue_depth
;
1168 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1173 int se_dev_set_max_sectors(struct se_device
*dev
, u32 max_sectors
)
1175 int force
= 0; /* Force setting for VDEVS */
1177 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1178 pr_err("dev[%p]: Unable to change SE Device"
1179 " max_sectors while dev_export_obj: %d count exists\n",
1180 dev
, atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1184 pr_err("dev[%p]: Illegal ZERO value for"
1185 " max_sectors\n", dev
);
1188 if (max_sectors
< DA_STATUS_MAX_SECTORS_MIN
) {
1189 pr_err("dev[%p]: Passed max_sectors: %u less than"
1190 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev
, max_sectors
,
1191 DA_STATUS_MAX_SECTORS_MIN
);
1194 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1195 if (max_sectors
> dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
) {
1196 pr_err("dev[%p]: Passed max_sectors: %u"
1197 " greater than TCM/SE_Device max_sectors:"
1198 " %u\n", dev
, max_sectors
,
1199 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
);
1203 if (!force
&& (max_sectors
>
1204 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
)) {
1205 pr_err("dev[%p]: Passed max_sectors: %u"
1206 " greater than TCM/SE_Device max_sectors"
1207 ": %u, use force=1 to override.\n", dev
,
1208 max_sectors
, dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
);
1211 if (max_sectors
> DA_STATUS_MAX_SECTORS_MAX
) {
1212 pr_err("dev[%p]: Passed max_sectors: %u"
1213 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1214 " %u\n", dev
, max_sectors
,
1215 DA_STATUS_MAX_SECTORS_MAX
);
1220 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1222 max_sectors
= se_dev_align_max_sectors(max_sectors
,
1223 dev
->se_sub_dev
->se_dev_attrib
.block_size
);
1225 dev
->se_sub_dev
->se_dev_attrib
.max_sectors
= max_sectors
;
1226 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1231 int se_dev_set_fabric_max_sectors(struct se_device
*dev
, u32 fabric_max_sectors
)
1233 int block_size
= dev
->se_sub_dev
->se_dev_attrib
.block_size
;
1235 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1236 pr_err("dev[%p]: Unable to change SE Device"
1237 " fabric_max_sectors while dev_export_obj: %d count exists\n",
1238 dev
, atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1241 if (!fabric_max_sectors
) {
1242 pr_err("dev[%p]: Illegal ZERO value for"
1243 " fabric_max_sectors\n", dev
);
1246 if (fabric_max_sectors
< DA_STATUS_MAX_SECTORS_MIN
) {
1247 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1248 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev
, fabric_max_sectors
,
1249 DA_STATUS_MAX_SECTORS_MIN
);
1252 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1253 if (fabric_max_sectors
> dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
) {
1254 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1255 " greater than TCM/SE_Device max_sectors:"
1256 " %u\n", dev
, fabric_max_sectors
,
1257 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
);
1261 if (fabric_max_sectors
> DA_STATUS_MAX_SECTORS_MAX
) {
1262 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1263 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1264 " %u\n", dev
, fabric_max_sectors
,
1265 DA_STATUS_MAX_SECTORS_MAX
);
1270 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1274 pr_warn("Defaulting to 512 for zero block_size\n");
1276 fabric_max_sectors
= se_dev_align_max_sectors(fabric_max_sectors
,
1279 dev
->se_sub_dev
->se_dev_attrib
.fabric_max_sectors
= fabric_max_sectors
;
1280 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1281 dev
, fabric_max_sectors
);
1285 int se_dev_set_optimal_sectors(struct se_device
*dev
, u32 optimal_sectors
)
1287 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1288 pr_err("dev[%p]: Unable to change SE Device"
1289 " optimal_sectors while dev_export_obj: %d count exists\n",
1290 dev
, atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1293 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1294 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1295 " changed for TCM/pSCSI\n", dev
);
1298 if (optimal_sectors
> dev
->se_sub_dev
->se_dev_attrib
.fabric_max_sectors
) {
1299 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1300 " greater than fabric_max_sectors: %u\n", dev
,
1301 optimal_sectors
, dev
->se_sub_dev
->se_dev_attrib
.fabric_max_sectors
);
1305 dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
= optimal_sectors
;
1306 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1307 dev
, optimal_sectors
);
1311 int se_dev_set_block_size(struct se_device
*dev
, u32 block_size
)
1313 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1314 pr_err("dev[%p]: Unable to change SE Device block_size"
1315 " while dev_export_obj: %d count exists\n", dev
,
1316 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1320 if ((block_size
!= 512) &&
1321 (block_size
!= 1024) &&
1322 (block_size
!= 2048) &&
1323 (block_size
!= 4096)) {
1324 pr_err("dev[%p]: Illegal value for block_device: %u"
1325 " for SE device, must be 512, 1024, 2048 or 4096\n",
1330 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1331 pr_err("dev[%p]: Not allowed to change block_size for"
1332 " Physical Device, use for Linux/SCSI to change"
1333 " block_size for underlying hardware\n", dev
);
1337 dev
->se_sub_dev
->se_dev_attrib
.block_size
= block_size
;
1338 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1343 struct se_lun
*core_dev_add_lun(
1344 struct se_portal_group
*tpg
,
1346 struct se_device
*dev
,
1349 struct se_lun
*lun_p
;
1353 if (atomic_read(&dev
->dev_access_obj
.obj_access_count
) != 0) {
1354 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1355 atomic_read(&dev
->dev_access_obj
.obj_access_count
));
1356 return ERR_PTR(-EACCES
);
1359 lun_p
= core_tpg_pre_addlun(tpg
, lun
);
1363 if (dev
->dev_flags
& DF_READ_ONLY
)
1364 lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
1366 lun_access
= TRANSPORT_LUNFLAGS_READ_WRITE
;
1368 rc
= core_tpg_post_addlun(tpg
, lun_p
, lun_access
, dev
);
1372 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1373 " CORE HBA: %u\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1374 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), lun_p
->unpacked_lun
,
1375 tpg
->se_tpg_tfo
->get_fabric_name(), hba
->hba_id
);
1377 * Update LUN maps for dynamically added initiators when
1378 * generate_node_acl is enabled.
1380 if (tpg
->se_tpg_tfo
->tpg_check_demo_mode(tpg
)) {
1381 struct se_node_acl
*acl
;
1382 spin_lock_irq(&tpg
->acl_node_lock
);
1383 list_for_each_entry(acl
, &tpg
->acl_node_list
, acl_list
) {
1384 if (acl
->dynamic_node_acl
&&
1385 (!tpg
->se_tpg_tfo
->tpg_check_demo_mode_login_only
||
1386 !tpg
->se_tpg_tfo
->tpg_check_demo_mode_login_only(tpg
))) {
1387 spin_unlock_irq(&tpg
->acl_node_lock
);
1388 core_tpg_add_node_to_devs(acl
, tpg
);
1389 spin_lock_irq(&tpg
->acl_node_lock
);
1392 spin_unlock_irq(&tpg
->acl_node_lock
);
1398 /* core_dev_del_lun():
1402 int core_dev_del_lun(
1403 struct se_portal_group
*tpg
,
1408 lun
= core_tpg_pre_dellun(tpg
, unpacked_lun
);
1410 return PTR_ERR(lun
);
1412 core_tpg_post_dellun(tpg
, lun
);
1414 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1415 " device object\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1416 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), unpacked_lun
,
1417 tpg
->se_tpg_tfo
->get_fabric_name());
1422 struct se_lun
*core_get_lun_from_tpg(struct se_portal_group
*tpg
, u32 unpacked_lun
)
1426 spin_lock(&tpg
->tpg_lun_lock
);
1427 if (unpacked_lun
> (TRANSPORT_MAX_LUNS_PER_TPG
-1)) {
1428 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1429 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1430 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1431 TRANSPORT_MAX_LUNS_PER_TPG
-1,
1432 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1433 spin_unlock(&tpg
->tpg_lun_lock
);
1436 lun
= tpg
->tpg_lun_list
[unpacked_lun
];
1438 if (lun
->lun_status
!= TRANSPORT_LUN_STATUS_FREE
) {
1439 pr_err("%s Logical Unit Number: %u is not free on"
1440 " Target Portal Group: %hu, ignoring request.\n",
1441 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1442 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1443 spin_unlock(&tpg
->tpg_lun_lock
);
1446 spin_unlock(&tpg
->tpg_lun_lock
);
1451 /* core_dev_get_lun():
1455 static struct se_lun
*core_dev_get_lun(struct se_portal_group
*tpg
, u32 unpacked_lun
)
1459 spin_lock(&tpg
->tpg_lun_lock
);
1460 if (unpacked_lun
> (TRANSPORT_MAX_LUNS_PER_TPG
-1)) {
1461 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1462 "_TPG-1: %u for Target Portal Group: %hu\n",
1463 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1464 TRANSPORT_MAX_LUNS_PER_TPG
-1,
1465 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1466 spin_unlock(&tpg
->tpg_lun_lock
);
1469 lun
= tpg
->tpg_lun_list
[unpacked_lun
];
1471 if (lun
->lun_status
!= TRANSPORT_LUN_STATUS_ACTIVE
) {
1472 pr_err("%s Logical Unit Number: %u is not active on"
1473 " Target Portal Group: %hu, ignoring request.\n",
1474 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1475 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1476 spin_unlock(&tpg
->tpg_lun_lock
);
1479 spin_unlock(&tpg
->tpg_lun_lock
);
1484 struct se_lun_acl
*core_dev_init_initiator_node_lun_acl(
1485 struct se_portal_group
*tpg
,
1486 struct se_node_acl
*nacl
,
1490 struct se_lun_acl
*lacl
;
1492 if (strlen(nacl
->initiatorname
) >= TRANSPORT_IQN_LEN
) {
1493 pr_err("%s InitiatorName exceeds maximum size.\n",
1494 tpg
->se_tpg_tfo
->get_fabric_name());
1498 lacl
= kzalloc(sizeof(struct se_lun_acl
), GFP_KERNEL
);
1500 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1505 INIT_LIST_HEAD(&lacl
->lacl_list
);
1506 lacl
->mapped_lun
= mapped_lun
;
1507 lacl
->se_lun_nacl
= nacl
;
1508 snprintf(lacl
->initiatorname
, TRANSPORT_IQN_LEN
, "%s",
1509 nacl
->initiatorname
);
1514 int core_dev_add_initiator_node_lun_acl(
1515 struct se_portal_group
*tpg
,
1516 struct se_lun_acl
*lacl
,
1521 struct se_node_acl
*nacl
;
1523 lun
= core_dev_get_lun(tpg
, unpacked_lun
);
1525 pr_err("%s Logical Unit Number: %u is not active on"
1526 " Target Portal Group: %hu, ignoring request.\n",
1527 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1528 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1532 nacl
= lacl
->se_lun_nacl
;
1536 if ((lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) &&
1537 (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
))
1538 lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
1542 if (core_update_device_list_for_node(lun
, lacl
, lacl
->mapped_lun
,
1543 lun_access
, nacl
, tpg
, 1) < 0)
1546 spin_lock(&lun
->lun_acl_lock
);
1547 list_add_tail(&lacl
->lacl_list
, &lun
->lun_acl_list
);
1548 atomic_inc(&lun
->lun_acl_count
);
1549 smp_mb__after_atomic_inc();
1550 spin_unlock(&lun
->lun_acl_lock
);
1552 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1553 " InitiatorNode: %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1554 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), unpacked_lun
, lacl
->mapped_lun
,
1555 (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) ? "RW" : "RO",
1556 lacl
->initiatorname
);
1558 * Check to see if there are any existing persistent reservation APTPL
1559 * pre-registrations that need to be enabled for this LUN ACL..
1561 core_scsi3_check_aptpl_registration(lun
->lun_se_dev
, tpg
, lun
, lacl
);
1565 /* core_dev_del_initiator_node_lun_acl():
1569 int core_dev_del_initiator_node_lun_acl(
1570 struct se_portal_group
*tpg
,
1572 struct se_lun_acl
*lacl
)
1574 struct se_node_acl
*nacl
;
1576 nacl
= lacl
->se_lun_nacl
;
1580 spin_lock(&lun
->lun_acl_lock
);
1581 list_del(&lacl
->lacl_list
);
1582 atomic_dec(&lun
->lun_acl_count
);
1583 smp_mb__after_atomic_dec();
1584 spin_unlock(&lun
->lun_acl_lock
);
1586 core_update_device_list_for_node(lun
, NULL
, lacl
->mapped_lun
,
1587 TRANSPORT_LUNFLAGS_NO_ACCESS
, nacl
, tpg
, 0);
1589 lacl
->se_lun
= NULL
;
1591 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1592 " InitiatorNode: %s Mapped LUN: %u\n",
1593 tpg
->se_tpg_tfo
->get_fabric_name(),
1594 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), lun
->unpacked_lun
,
1595 lacl
->initiatorname
, lacl
->mapped_lun
);
1600 void core_dev_free_initiator_node_lun_acl(
1601 struct se_portal_group
*tpg
,
1602 struct se_lun_acl
*lacl
)
1604 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1605 " Mapped LUN: %u\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1606 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
1607 tpg
->se_tpg_tfo
->get_fabric_name(),
1608 lacl
->initiatorname
, lacl
->mapped_lun
);
1613 int core_dev_setup_virtual_lun0(void)
1616 struct se_device
*dev
;
1617 struct se_subsystem_dev
*se_dev
= NULL
;
1618 struct se_subsystem_api
*t
;
1622 hba
= core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE
);
1624 return PTR_ERR(hba
);
1629 se_dev
= kzalloc(sizeof(struct se_subsystem_dev
), GFP_KERNEL
);
1631 pr_err("Unable to allocate memory for"
1632 " struct se_subsystem_dev\n");
1636 INIT_LIST_HEAD(&se_dev
->t10_wwn
.t10_vpd_list
);
1637 spin_lock_init(&se_dev
->t10_wwn
.t10_vpd_lock
);
1638 INIT_LIST_HEAD(&se_dev
->t10_pr
.registration_list
);
1639 INIT_LIST_HEAD(&se_dev
->t10_pr
.aptpl_reg_list
);
1640 spin_lock_init(&se_dev
->t10_pr
.registration_lock
);
1641 spin_lock_init(&se_dev
->t10_pr
.aptpl_reg_lock
);
1642 INIT_LIST_HEAD(&se_dev
->t10_alua
.tg_pt_gps_list
);
1643 spin_lock_init(&se_dev
->t10_alua
.tg_pt_gps_lock
);
1644 spin_lock_init(&se_dev
->se_dev_lock
);
1645 se_dev
->t10_pr
.pr_aptpl_buf_len
= PR_APTPL_BUF_LEN
;
1646 se_dev
->t10_wwn
.t10_sub_dev
= se_dev
;
1647 se_dev
->t10_alua
.t10_sub_dev
= se_dev
;
1648 se_dev
->se_dev_attrib
.da_sub_dev
= se_dev
;
1649 se_dev
->se_dev_hba
= hba
;
1651 se_dev
->se_dev_su_ptr
= t
->allocate_virtdevice(hba
, "virt_lun0");
1652 if (!se_dev
->se_dev_su_ptr
) {
1653 pr_err("Unable to locate subsystem dependent pointer"
1654 " from allocate_virtdevice()\n");
1658 lun0_su_dev
= se_dev
;
1661 sprintf(buf
, "rd_pages=8");
1662 t
->set_configfs_dev_params(hba
, se_dev
, buf
, sizeof(buf
));
1664 dev
= t
->create_virtdevice(hba
, se_dev
, se_dev
->se_dev_su_ptr
);
1669 dev
->dev_link_magic
= SE_DEV_LINK_MAGIC
;
1670 se_dev
->se_dev_ptr
= dev
;
1678 core_delete_hba(lun0_hba
);
1685 void core_dev_release_virtual_lun0(void)
1687 struct se_hba
*hba
= lun0_hba
;
1688 struct se_subsystem_dev
*su_dev
= lun0_su_dev
;
1694 se_free_virtual_device(g_lun0_dev
, hba
);
1697 core_delete_hba(hba
);