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>
40 #include <scsi/scsi.h>
41 #include <scsi/scsi_device.h>
43 #include <target/target_core_base.h>
44 #include <target/target_core_device.h>
45 #include <target/target_core_tpg.h>
46 #include <target/target_core_transport.h>
47 #include <target/target_core_fabric_ops.h>
49 #include "target_core_alua.h"
50 #include "target_core_hba.h"
51 #include "target_core_pr.h"
52 #include "target_core_ua.h"
54 static void se_dev_start(struct se_device
*dev
);
55 static void se_dev_stop(struct se_device
*dev
);
57 static struct se_hba
*lun0_hba
;
58 static struct se_subsystem_dev
*lun0_su_dev
;
59 /* not static, needed by tpg.c */
60 struct se_device
*g_lun0_dev
;
62 int transport_lookup_cmd_lun(struct se_cmd
*se_cmd
, u32 unpacked_lun
)
64 struct se_lun
*se_lun
= NULL
;
65 struct se_session
*se_sess
= se_cmd
->se_sess
;
66 struct se_device
*dev
;
69 if (unpacked_lun
>= TRANSPORT_MAX_LUNS_PER_TPG
) {
70 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
71 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
75 spin_lock_irqsave(&se_sess
->se_node_acl
->device_list_lock
, flags
);
76 se_cmd
->se_deve
= &se_sess
->se_node_acl
->device_list
[unpacked_lun
];
77 if (se_cmd
->se_deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
78 struct se_dev_entry
*deve
= se_cmd
->se_deve
;
81 deve
->total_bytes
+= se_cmd
->data_length
;
83 if ((se_cmd
->data_direction
== DMA_TO_DEVICE
) &&
84 (deve
->lun_flags
& TRANSPORT_LUNFLAGS_READ_ONLY
)) {
85 se_cmd
->scsi_sense_reason
= TCM_WRITE_PROTECTED
;
86 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
87 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
88 " Access for 0x%08x\n",
89 se_cmd
->se_tfo
->get_fabric_name(),
91 spin_unlock_irqrestore(&se_sess
->se_node_acl
->device_list_lock
, flags
);
95 if (se_cmd
->data_direction
== DMA_TO_DEVICE
)
96 deve
->write_bytes
+= se_cmd
->data_length
;
97 else if (se_cmd
->data_direction
== DMA_FROM_DEVICE
)
98 deve
->read_bytes
+= se_cmd
->data_length
;
102 se_lun
= deve
->se_lun
;
103 se_cmd
->se_lun
= deve
->se_lun
;
104 se_cmd
->pr_res_key
= deve
->pr_res_key
;
105 se_cmd
->orig_fe_lun
= unpacked_lun
;
106 se_cmd
->se_orig_obj_ptr
= se_cmd
->se_lun
->lun_se_dev
;
107 se_cmd
->se_cmd_flags
|= SCF_SE_LUN_CMD
;
109 spin_unlock_irqrestore(&se_sess
->se_node_acl
->device_list_lock
, flags
);
113 * Use the se_portal_group->tpg_virt_lun0 to allow for
114 * REPORT_LUNS, et al to be returned when no active
115 * MappedLUN=0 exists for this Initiator Port.
117 if (unpacked_lun
!= 0) {
118 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
119 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
120 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
121 " Access for 0x%08x\n",
122 se_cmd
->se_tfo
->get_fabric_name(),
127 * Force WRITE PROTECT for virtual LUN 0
129 if ((se_cmd
->data_direction
!= DMA_FROM_DEVICE
) &&
130 (se_cmd
->data_direction
!= DMA_NONE
)) {
131 se_cmd
->scsi_sense_reason
= TCM_WRITE_PROTECTED
;
132 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
136 se_lun
= &se_sess
->se_tpg
->tpg_virt_lun0
;
137 se_cmd
->se_lun
= &se_sess
->se_tpg
->tpg_virt_lun0
;
138 se_cmd
->orig_fe_lun
= 0;
139 se_cmd
->se_orig_obj_ptr
= se_cmd
->se_lun
->lun_se_dev
;
140 se_cmd
->se_cmd_flags
|= SCF_SE_LUN_CMD
;
143 * Determine if the struct se_lun is online.
144 * FIXME: Check for LUN_RESET + UNIT Attention
146 if (se_dev_check_online(se_lun
->lun_se_dev
) != 0) {
147 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
148 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
152 /* Directly associate cmd with se_dev */
153 se_cmd
->se_dev
= se_lun
->lun_se_dev
;
155 /* TODO: get rid of this and use atomics for stats */
156 dev
= se_lun
->lun_se_dev
;
157 spin_lock_irqsave(&dev
->stats_lock
, flags
);
159 if (se_cmd
->data_direction
== DMA_TO_DEVICE
)
160 dev
->write_bytes
+= se_cmd
->data_length
;
161 else if (se_cmd
->data_direction
== DMA_FROM_DEVICE
)
162 dev
->read_bytes
+= se_cmd
->data_length
;
163 spin_unlock_irqrestore(&dev
->stats_lock
, flags
);
166 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
167 * for tracking state of struct se_cmds during LUN shutdown events.
169 spin_lock_irqsave(&se_lun
->lun_cmd_lock
, flags
);
170 list_add_tail(&se_cmd
->se_lun_node
, &se_lun
->lun_cmd_list
);
171 atomic_set(&se_cmd
->transport_lun_active
, 1);
172 spin_unlock_irqrestore(&se_lun
->lun_cmd_lock
, flags
);
176 EXPORT_SYMBOL(transport_lookup_cmd_lun
);
178 int transport_lookup_tmr_lun(struct se_cmd
*se_cmd
, u32 unpacked_lun
)
180 struct se_dev_entry
*deve
;
181 struct se_lun
*se_lun
= NULL
;
182 struct se_session
*se_sess
= se_cmd
->se_sess
;
183 struct se_tmr_req
*se_tmr
= se_cmd
->se_tmr_req
;
185 if (unpacked_lun
>= TRANSPORT_MAX_LUNS_PER_TPG
) {
186 se_cmd
->scsi_sense_reason
= TCM_NON_EXISTENT_LUN
;
187 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
191 spin_lock_irq(&se_sess
->se_node_acl
->device_list_lock
);
192 se_cmd
->se_deve
= &se_sess
->se_node_acl
->device_list
[unpacked_lun
];
193 deve
= se_cmd
->se_deve
;
195 if (deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
196 se_tmr
->tmr_lun
= deve
->se_lun
;
197 se_cmd
->se_lun
= deve
->se_lun
;
198 se_lun
= deve
->se_lun
;
199 se_cmd
->pr_res_key
= deve
->pr_res_key
;
200 se_cmd
->orig_fe_lun
= unpacked_lun
;
201 se_cmd
->se_orig_obj_ptr
= se_cmd
->se_dev
;
203 spin_unlock_irq(&se_sess
->se_node_acl
->device_list_lock
);
206 printk(KERN_INFO
"TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
207 " Access for 0x%08x\n",
208 se_cmd
->se_tfo
->get_fabric_name(),
210 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
214 * Determine if the struct se_lun is online.
215 * FIXME: Check for LUN_RESET + UNIT Attention
217 if (se_dev_check_online(se_lun
->lun_se_dev
) != 0) {
218 se_cmd
->se_cmd_flags
|= SCF_SCSI_CDB_EXCEPTION
;
222 /* Directly associate cmd with se_dev */
223 se_cmd
->se_dev
= se_lun
->lun_se_dev
;
224 se_tmr
->tmr_dev
= se_lun
->lun_se_dev
;
226 spin_lock(&se_tmr
->tmr_dev
->se_tmr_lock
);
227 list_add_tail(&se_tmr
->tmr_list
, &se_tmr
->tmr_dev
->dev_tmr_list
);
228 spin_unlock(&se_tmr
->tmr_dev
->se_tmr_lock
);
232 EXPORT_SYMBOL(transport_lookup_tmr_lun
);
235 * This function is called from core_scsi3_emulate_pro_register_and_move()
236 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
237 * when a matching rtpi is found.
239 struct se_dev_entry
*core_get_se_deve_from_rtpi(
240 struct se_node_acl
*nacl
,
243 struct se_dev_entry
*deve
;
245 struct se_port
*port
;
246 struct se_portal_group
*tpg
= nacl
->se_tpg
;
249 spin_lock_irq(&nacl
->device_list_lock
);
250 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
251 deve
= &nacl
->device_list
[i
];
253 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
258 printk(KERN_ERR
"%s device entries device pointer is"
259 " NULL, but Initiator has access.\n",
260 tpg
->se_tpg_tfo
->get_fabric_name());
265 printk(KERN_ERR
"%s device entries device pointer is"
266 " NULL, but Initiator has access.\n",
267 tpg
->se_tpg_tfo
->get_fabric_name());
270 if (port
->sep_rtpi
!= rtpi
)
273 atomic_inc(&deve
->pr_ref_count
);
274 smp_mb__after_atomic_inc();
275 spin_unlock_irq(&nacl
->device_list_lock
);
279 spin_unlock_irq(&nacl
->device_list_lock
);
284 int core_free_device_list_for_node(
285 struct se_node_acl
*nacl
,
286 struct se_portal_group
*tpg
)
288 struct se_dev_entry
*deve
;
292 if (!nacl
->device_list
)
295 spin_lock_irq(&nacl
->device_list_lock
);
296 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
297 deve
= &nacl
->device_list
[i
];
299 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
303 printk(KERN_ERR
"%s device entries device pointer is"
304 " NULL, but Initiator has access.\n",
305 tpg
->se_tpg_tfo
->get_fabric_name());
310 spin_unlock_irq(&nacl
->device_list_lock
);
311 core_update_device_list_for_node(lun
, NULL
, deve
->mapped_lun
,
312 TRANSPORT_LUNFLAGS_NO_ACCESS
, nacl
, tpg
, 0);
313 spin_lock_irq(&nacl
->device_list_lock
);
315 spin_unlock_irq(&nacl
->device_list_lock
);
317 kfree(nacl
->device_list
);
318 nacl
->device_list
= NULL
;
323 void core_dec_lacl_count(struct se_node_acl
*se_nacl
, struct se_cmd
*se_cmd
)
325 struct se_dev_entry
*deve
;
327 spin_lock_irq(&se_nacl
->device_list_lock
);
328 deve
= &se_nacl
->device_list
[se_cmd
->orig_fe_lun
];
330 spin_unlock_irq(&se_nacl
->device_list_lock
);
333 void core_update_device_list_access(
336 struct se_node_acl
*nacl
)
338 struct se_dev_entry
*deve
;
340 spin_lock_irq(&nacl
->device_list_lock
);
341 deve
= &nacl
->device_list
[mapped_lun
];
342 if (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) {
343 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_ONLY
;
344 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_WRITE
;
346 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_WRITE
;
347 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_ONLY
;
349 spin_unlock_irq(&nacl
->device_list_lock
);
352 /* core_update_device_list_for_node():
356 int core_update_device_list_for_node(
358 struct se_lun_acl
*lun_acl
,
361 struct se_node_acl
*nacl
,
362 struct se_portal_group
*tpg
,
365 struct se_port
*port
= lun
->lun_sep
;
366 struct se_dev_entry
*deve
= &nacl
->device_list
[mapped_lun
];
369 * If the MappedLUN entry is being disabled, the entry in
370 * port->sep_alua_list must be removed now before clearing the
371 * struct se_dev_entry pointers below as logic in
372 * core_alua_do_transition_tg_pt() depends on these being present.
376 * deve->se_lun_acl will be NULL for demo-mode created LUNs
377 * that have not been explicitly concerted to MappedLUNs ->
378 * struct se_lun_acl, but we remove deve->alua_port_list from
379 * port->sep_alua_list. This also means that active UAs and
380 * NodeACL context specific PR metadata for demo-mode
381 * MappedLUN *deve will be released below..
383 spin_lock_bh(&port
->sep_alua_lock
);
384 list_del(&deve
->alua_port_list
);
385 spin_unlock_bh(&port
->sep_alua_lock
);
388 spin_lock_irq(&nacl
->device_list_lock
);
391 * Check if the call is handling demo mode -> explict LUN ACL
392 * transition. This transition must be for the same struct se_lun
393 * + mapped_lun that was setup in demo mode..
395 if (deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
) {
396 if (deve
->se_lun_acl
!= NULL
) {
397 printk(KERN_ERR
"struct se_dev_entry->se_lun_acl"
398 " already set for demo mode -> explict"
399 " LUN ACL transition\n");
400 spin_unlock_irq(&nacl
->device_list_lock
);
403 if (deve
->se_lun
!= lun
) {
404 printk(KERN_ERR
"struct se_dev_entry->se_lun does"
405 " match passed struct se_lun for demo mode"
406 " -> explict LUN ACL transition\n");
407 spin_unlock_irq(&nacl
->device_list_lock
);
410 deve
->se_lun_acl
= lun_acl
;
414 deve
->se_lun_acl
= lun_acl
;
415 deve
->mapped_lun
= mapped_lun
;
416 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
;
419 if (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) {
420 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_ONLY
;
421 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_WRITE
;
423 deve
->lun_flags
&= ~TRANSPORT_LUNFLAGS_READ_WRITE
;
424 deve
->lun_flags
|= TRANSPORT_LUNFLAGS_READ_ONLY
;
428 spin_unlock_irq(&nacl
->device_list_lock
);
431 deve
->creation_time
= get_jiffies_64();
432 deve
->attach_count
++;
433 spin_unlock_irq(&nacl
->device_list_lock
);
435 spin_lock_bh(&port
->sep_alua_lock
);
436 list_add_tail(&deve
->alua_port_list
, &port
->sep_alua_list
);
437 spin_unlock_bh(&port
->sep_alua_lock
);
442 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
443 * PR operation to complete.
445 spin_unlock_irq(&nacl
->device_list_lock
);
446 while (atomic_read(&deve
->pr_ref_count
) != 0)
448 spin_lock_irq(&nacl
->device_list_lock
);
450 * Disable struct se_dev_entry LUN ACL mapping
452 core_scsi3_ua_release_all(deve
);
454 deve
->se_lun_acl
= NULL
;
456 deve
->creation_time
= 0;
457 deve
->attach_count
--;
458 spin_unlock_irq(&nacl
->device_list_lock
);
460 core_scsi3_free_pr_reg_from_nacl(lun
->lun_se_dev
, nacl
);
464 /* core_clear_lun_from_tpg():
468 void core_clear_lun_from_tpg(struct se_lun
*lun
, struct se_portal_group
*tpg
)
470 struct se_node_acl
*nacl
;
471 struct se_dev_entry
*deve
;
474 spin_lock_bh(&tpg
->acl_node_lock
);
475 list_for_each_entry(nacl
, &tpg
->acl_node_list
, acl_list
) {
476 spin_unlock_bh(&tpg
->acl_node_lock
);
478 spin_lock_irq(&nacl
->device_list_lock
);
479 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
480 deve
= &nacl
->device_list
[i
];
481 if (lun
!= deve
->se_lun
)
483 spin_unlock_irq(&nacl
->device_list_lock
);
485 core_update_device_list_for_node(lun
, NULL
,
486 deve
->mapped_lun
, TRANSPORT_LUNFLAGS_NO_ACCESS
,
489 spin_lock_irq(&nacl
->device_list_lock
);
491 spin_unlock_irq(&nacl
->device_list_lock
);
493 spin_lock_bh(&tpg
->acl_node_lock
);
495 spin_unlock_bh(&tpg
->acl_node_lock
);
498 static struct se_port
*core_alloc_port(struct se_device
*dev
)
500 struct se_port
*port
, *port_tmp
;
502 port
= kzalloc(sizeof(struct se_port
), GFP_KERNEL
);
504 printk(KERN_ERR
"Unable to allocate struct se_port\n");
505 return ERR_PTR(-ENOMEM
);
507 INIT_LIST_HEAD(&port
->sep_alua_list
);
508 INIT_LIST_HEAD(&port
->sep_list
);
509 atomic_set(&port
->sep_tg_pt_secondary_offline
, 0);
510 spin_lock_init(&port
->sep_alua_lock
);
511 mutex_init(&port
->sep_tg_pt_md_mutex
);
513 spin_lock(&dev
->se_port_lock
);
514 if (dev
->dev_port_count
== 0x0000ffff) {
515 printk(KERN_WARNING
"Reached dev->dev_port_count =="
517 spin_unlock(&dev
->se_port_lock
);
518 return ERR_PTR(-ENOSPC
);
522 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
523 * Here is the table from spc4r17 section 7.7.3.8.
525 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
529 * 1h Relative port 1, historically known as port A
530 * 2h Relative port 2, historically known as port B
531 * 3h to FFFFh Relative port 3 through 65 535
533 port
->sep_rtpi
= dev
->dev_rpti_counter
++;
534 if (!(port
->sep_rtpi
))
537 list_for_each_entry(port_tmp
, &dev
->dev_sep_list
, sep_list
) {
539 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
542 if (port
->sep_rtpi
== port_tmp
->sep_rtpi
)
545 spin_unlock(&dev
->se_port_lock
);
550 static void core_export_port(
551 struct se_device
*dev
,
552 struct se_portal_group
*tpg
,
553 struct se_port
*port
,
556 struct se_subsystem_dev
*su_dev
= dev
->se_sub_dev
;
557 struct t10_alua_tg_pt_gp_member
*tg_pt_gp_mem
= NULL
;
559 spin_lock(&dev
->se_port_lock
);
560 spin_lock(&lun
->lun_sep_lock
);
564 spin_unlock(&lun
->lun_sep_lock
);
566 list_add_tail(&port
->sep_list
, &dev
->dev_sep_list
);
567 spin_unlock(&dev
->se_port_lock
);
569 if (su_dev
->t10_alua
.alua_type
== SPC3_ALUA_EMULATED
) {
570 tg_pt_gp_mem
= core_alua_allocate_tg_pt_gp_mem(port
);
571 if (IS_ERR(tg_pt_gp_mem
) || !tg_pt_gp_mem
) {
572 printk(KERN_ERR
"Unable to allocate t10_alua_tg_pt"
576 spin_lock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
577 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem
,
578 su_dev
->t10_alua
.default_tg_pt_gp
);
579 spin_unlock(&tg_pt_gp_mem
->tg_pt_gp_mem_lock
);
580 printk(KERN_INFO
"%s/%s: Adding to default ALUA Target Port"
581 " Group: alua/default_tg_pt_gp\n",
582 dev
->transport
->name
, tpg
->se_tpg_tfo
->get_fabric_name());
585 dev
->dev_port_count
++;
586 port
->sep_index
= port
->sep_rtpi
; /* RELATIVE TARGET PORT IDENTIFER */
590 * Called with struct se_device->se_port_lock spinlock held.
592 static void core_release_port(struct se_device
*dev
, struct se_port
*port
)
593 __releases(&dev
->se_port_lock
) __acquires(&dev
->se_port_lock
)
596 * Wait for any port reference for PR ALL_TG_PT=1 operation
597 * to complete in __core_scsi3_alloc_registration()
599 spin_unlock(&dev
->se_port_lock
);
600 if (atomic_read(&port
->sep_tg_pt_ref_cnt
))
602 spin_lock(&dev
->se_port_lock
);
604 core_alua_free_tg_pt_gp_mem(port
);
606 list_del(&port
->sep_list
);
607 dev
->dev_port_count
--;
612 struct se_device
*dev
,
613 struct se_portal_group
*tpg
,
616 struct se_port
*port
;
618 port
= core_alloc_port(dev
);
620 return PTR_ERR(port
);
622 lun
->lun_se_dev
= dev
;
625 atomic_inc(&dev
->dev_export_obj
.obj_access_count
);
626 core_export_port(dev
, tpg
, port
, lun
);
630 void core_dev_unexport(
631 struct se_device
*dev
,
632 struct se_portal_group
*tpg
,
635 struct se_port
*port
= lun
->lun_sep
;
637 spin_lock(&lun
->lun_sep_lock
);
638 if (lun
->lun_se_dev
== NULL
) {
639 spin_unlock(&lun
->lun_sep_lock
);
642 spin_unlock(&lun
->lun_sep_lock
);
644 spin_lock(&dev
->se_port_lock
);
645 atomic_dec(&dev
->dev_export_obj
.obj_access_count
);
646 core_release_port(dev
, port
);
647 spin_unlock(&dev
->se_port_lock
);
650 lun
->lun_se_dev
= NULL
;
653 int transport_core_report_lun_response(struct se_cmd
*se_cmd
)
655 struct se_dev_entry
*deve
;
656 struct se_lun
*se_lun
;
657 struct se_session
*se_sess
= se_cmd
->se_sess
;
658 struct se_task
*se_task
;
659 unsigned char *buf
= se_cmd
->t_task_buf
;
660 u32 cdb_offset
= 0, lun_count
= 0, offset
= 8, i
;
662 list_for_each_entry(se_task
, &se_cmd
->t_task_list
, t_list
)
666 printk(KERN_ERR
"Unable to locate struct se_task for struct se_cmd\n");
667 return PYX_TRANSPORT_LU_COMM_FAILURE
;
671 * If no struct se_session pointer is present, this struct se_cmd is
672 * coming via a target_core_mod PASSTHROUGH op, and not through
673 * a $FABRIC_MOD. In that case, report LUN=0 only.
676 int_to_scsilun(0, (struct scsi_lun
*)&buf
[offset
]);
681 spin_lock_irq(&se_sess
->se_node_acl
->device_list_lock
);
682 for (i
= 0; i
< TRANSPORT_MAX_LUNS_PER_TPG
; i
++) {
683 deve
= &se_sess
->se_node_acl
->device_list
[i
];
684 if (!(deve
->lun_flags
& TRANSPORT_LUNFLAGS_INITIATOR_ACCESS
))
686 se_lun
= deve
->se_lun
;
688 * We determine the correct LUN LIST LENGTH even once we
689 * have reached the initial allocation length.
693 if ((cdb_offset
+ 8) >= se_cmd
->data_length
)
696 int_to_scsilun(deve
->mapped_lun
, (struct scsi_lun
*)&buf
[offset
]);
700 spin_unlock_irq(&se_sess
->se_node_acl
->device_list_lock
);
703 * See SPC3 r07, page 159.
707 buf
[0] = ((lun_count
>> 24) & 0xff);
708 buf
[1] = ((lun_count
>> 16) & 0xff);
709 buf
[2] = ((lun_count
>> 8) & 0xff);
710 buf
[3] = (lun_count
& 0xff);
712 return PYX_TRANSPORT_SENT_TO_TRANSPORT
;
715 /* se_release_device_for_hba():
719 void se_release_device_for_hba(struct se_device
*dev
)
721 struct se_hba
*hba
= dev
->se_hba
;
723 if ((dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) ||
724 (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
) ||
725 (dev
->dev_status
& TRANSPORT_DEVICE_SHUTDOWN
) ||
726 (dev
->dev_status
& TRANSPORT_DEVICE_OFFLINE_ACTIVATED
) ||
727 (dev
->dev_status
& TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
))
731 kthread_stop(dev
->process_thread
);
732 if (dev
->transport
->free_device
)
733 dev
->transport
->free_device(dev
->dev_ptr
);
736 spin_lock(&hba
->device_lock
);
737 list_del(&dev
->dev_list
);
739 spin_unlock(&hba
->device_lock
);
741 core_scsi3_free_all_registrations(dev
);
742 se_release_vpd_for_dev(dev
);
747 void se_release_vpd_for_dev(struct se_device
*dev
)
749 struct t10_vpd
*vpd
, *vpd_tmp
;
751 spin_lock(&dev
->se_sub_dev
->t10_wwn
.t10_vpd_lock
);
752 list_for_each_entry_safe(vpd
, vpd_tmp
,
753 &dev
->se_sub_dev
->t10_wwn
.t10_vpd_list
, vpd_list
) {
754 list_del(&vpd
->vpd_list
);
757 spin_unlock(&dev
->se_sub_dev
->t10_wwn
.t10_vpd_lock
);
760 /* se_free_virtual_device():
762 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
764 int se_free_virtual_device(struct se_device
*dev
, struct se_hba
*hba
)
766 if (!list_empty(&dev
->dev_sep_list
))
769 core_alua_free_lu_gp_mem(dev
);
770 se_release_device_for_hba(dev
);
775 static void se_dev_start(struct se_device
*dev
)
777 struct se_hba
*hba
= dev
->se_hba
;
779 spin_lock(&hba
->device_lock
);
780 atomic_inc(&dev
->dev_obj
.obj_access_count
);
781 if (atomic_read(&dev
->dev_obj
.obj_access_count
) == 1) {
782 if (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
) {
783 dev
->dev_status
&= ~TRANSPORT_DEVICE_DEACTIVATED
;
784 dev
->dev_status
|= TRANSPORT_DEVICE_ACTIVATED
;
785 } else if (dev
->dev_status
&
786 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
) {
788 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
;
789 dev
->dev_status
|= TRANSPORT_DEVICE_OFFLINE_ACTIVATED
;
792 spin_unlock(&hba
->device_lock
);
795 static void se_dev_stop(struct se_device
*dev
)
797 struct se_hba
*hba
= dev
->se_hba
;
799 spin_lock(&hba
->device_lock
);
800 atomic_dec(&dev
->dev_obj
.obj_access_count
);
801 if (atomic_read(&dev
->dev_obj
.obj_access_count
) == 0) {
802 if (dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) {
803 dev
->dev_status
&= ~TRANSPORT_DEVICE_ACTIVATED
;
804 dev
->dev_status
|= TRANSPORT_DEVICE_DEACTIVATED
;
805 } else if (dev
->dev_status
&
806 TRANSPORT_DEVICE_OFFLINE_ACTIVATED
) {
807 dev
->dev_status
&= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED
;
808 dev
->dev_status
|= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED
;
811 spin_unlock(&hba
->device_lock
);
814 int se_dev_check_online(struct se_device
*dev
)
818 spin_lock_irq(&dev
->dev_status_lock
);
819 ret
= ((dev
->dev_status
& TRANSPORT_DEVICE_ACTIVATED
) ||
820 (dev
->dev_status
& TRANSPORT_DEVICE_DEACTIVATED
)) ? 0 : 1;
821 spin_unlock_irq(&dev
->dev_status_lock
);
826 int se_dev_check_shutdown(struct se_device
*dev
)
830 spin_lock_irq(&dev
->dev_status_lock
);
831 ret
= (dev
->dev_status
& TRANSPORT_DEVICE_SHUTDOWN
);
832 spin_unlock_irq(&dev
->dev_status_lock
);
837 void se_dev_set_default_attribs(
838 struct se_device
*dev
,
839 struct se_dev_limits
*dev_limits
)
841 struct queue_limits
*limits
= &dev_limits
->limits
;
843 dev
->se_sub_dev
->se_dev_attrib
.emulate_dpo
= DA_EMULATE_DPO
;
844 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
= DA_EMULATE_FUA_WRITE
;
845 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_read
= DA_EMULATE_FUA_READ
;
846 dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
= DA_EMULATE_WRITE_CACHE
;
847 dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
= DA_EMULATE_UA_INTLLCK_CTRL
;
848 dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
= DA_EMULATE_TAS
;
849 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
= DA_EMULATE_TPU
;
850 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
= DA_EMULATE_TPWS
;
851 dev
->se_sub_dev
->se_dev_attrib
.emulate_reservations
= DA_EMULATE_RESERVATIONS
;
852 dev
->se_sub_dev
->se_dev_attrib
.emulate_alua
= DA_EMULATE_ALUA
;
853 dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
= DA_ENFORCE_PR_ISIDS
;
855 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
856 * iblock_create_virtdevice() from struct queue_limits values
857 * if blk_queue_discard()==1
859 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
= DA_MAX_UNMAP_LBA_COUNT
;
860 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
=
861 DA_MAX_UNMAP_BLOCK_DESC_COUNT
;
862 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
= DA_UNMAP_GRANULARITY_DEFAULT
;
863 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
=
864 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT
;
866 * block_size is based on subsystem plugin dependent requirements.
868 dev
->se_sub_dev
->se_dev_attrib
.hw_block_size
= limits
->logical_block_size
;
869 dev
->se_sub_dev
->se_dev_attrib
.block_size
= limits
->logical_block_size
;
871 * max_sectors is based on subsystem plugin dependent requirements.
873 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
= limits
->max_hw_sectors
;
874 dev
->se_sub_dev
->se_dev_attrib
.max_sectors
= limits
->max_sectors
;
876 * Set optimal_sectors from max_sectors, which can be lowered via
879 dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
= limits
->max_sectors
;
881 * queue_depth is based on subsystem plugin dependent requirements.
883 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
= dev_limits
->hw_queue_depth
;
884 dev
->se_sub_dev
->se_dev_attrib
.queue_depth
= dev_limits
->queue_depth
;
887 int se_dev_set_task_timeout(struct se_device
*dev
, u32 task_timeout
)
889 if (task_timeout
> DA_TASK_TIMEOUT_MAX
) {
890 printk(KERN_ERR
"dev[%p]: Passed task_timeout: %u larger then"
891 " DA_TASK_TIMEOUT_MAX\n", dev
, task_timeout
);
894 dev
->se_sub_dev
->se_dev_attrib
.task_timeout
= task_timeout
;
895 printk(KERN_INFO
"dev[%p]: Set SE Device task_timeout: %u\n",
902 int se_dev_set_max_unmap_lba_count(
903 struct se_device
*dev
,
904 u32 max_unmap_lba_count
)
906 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
= max_unmap_lba_count
;
907 printk(KERN_INFO
"dev[%p]: Set max_unmap_lba_count: %u\n",
908 dev
, dev
->se_sub_dev
->se_dev_attrib
.max_unmap_lba_count
);
912 int se_dev_set_max_unmap_block_desc_count(
913 struct se_device
*dev
,
914 u32 max_unmap_block_desc_count
)
916 dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
=
917 max_unmap_block_desc_count
;
918 printk(KERN_INFO
"dev[%p]: Set max_unmap_block_desc_count: %u\n",
919 dev
, dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
);
923 int se_dev_set_unmap_granularity(
924 struct se_device
*dev
,
925 u32 unmap_granularity
)
927 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
= unmap_granularity
;
928 printk(KERN_INFO
"dev[%p]: Set unmap_granularity: %u\n",
929 dev
, dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity
);
933 int se_dev_set_unmap_granularity_alignment(
934 struct se_device
*dev
,
935 u32 unmap_granularity_alignment
)
937 dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
= unmap_granularity_alignment
;
938 printk(KERN_INFO
"dev[%p]: Set unmap_granularity_alignment: %u\n",
939 dev
, dev
->se_sub_dev
->se_dev_attrib
.unmap_granularity_alignment
);
943 int se_dev_set_emulate_dpo(struct se_device
*dev
, int flag
)
945 if ((flag
!= 0) && (flag
!= 1)) {
946 printk(KERN_ERR
"Illegal value %d\n", flag
);
949 if (dev
->transport
->dpo_emulated
== NULL
) {
950 printk(KERN_ERR
"dev->transport->dpo_emulated is NULL\n");
953 if (dev
->transport
->dpo_emulated(dev
) == 0) {
954 printk(KERN_ERR
"dev->transport->dpo_emulated not supported\n");
957 dev
->se_sub_dev
->se_dev_attrib
.emulate_dpo
= flag
;
958 printk(KERN_INFO
"dev[%p]: SE Device Page Out (DPO) Emulation"
959 " bit: %d\n", dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_dpo
);
963 int se_dev_set_emulate_fua_write(struct se_device
*dev
, int flag
)
965 if ((flag
!= 0) && (flag
!= 1)) {
966 printk(KERN_ERR
"Illegal value %d\n", flag
);
969 if (dev
->transport
->fua_write_emulated
== NULL
) {
970 printk(KERN_ERR
"dev->transport->fua_write_emulated is NULL\n");
973 if (dev
->transport
->fua_write_emulated(dev
) == 0) {
974 printk(KERN_ERR
"dev->transport->fua_write_emulated not supported\n");
977 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
= flag
;
978 printk(KERN_INFO
"dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
979 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_write
);
983 int se_dev_set_emulate_fua_read(struct se_device
*dev
, int flag
)
985 if ((flag
!= 0) && (flag
!= 1)) {
986 printk(KERN_ERR
"Illegal value %d\n", flag
);
989 if (dev
->transport
->fua_read_emulated
== NULL
) {
990 printk(KERN_ERR
"dev->transport->fua_read_emulated is NULL\n");
993 if (dev
->transport
->fua_read_emulated(dev
) == 0) {
994 printk(KERN_ERR
"dev->transport->fua_read_emulated not supported\n");
997 dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_read
= flag
;
998 printk(KERN_INFO
"dev[%p]: SE Device Forced Unit Access READs: %d\n",
999 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_fua_read
);
1003 int se_dev_set_emulate_write_cache(struct se_device
*dev
, int flag
)
1005 if ((flag
!= 0) && (flag
!= 1)) {
1006 printk(KERN_ERR
"Illegal value %d\n", flag
);
1009 if (dev
->transport
->write_cache_emulated
== NULL
) {
1010 printk(KERN_ERR
"dev->transport->write_cache_emulated is NULL\n");
1013 if (dev
->transport
->write_cache_emulated(dev
) == 0) {
1014 printk(KERN_ERR
"dev->transport->write_cache_emulated not supported\n");
1017 dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
= flag
;
1018 printk(KERN_INFO
"dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1019 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_write_cache
);
1023 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device
*dev
, int flag
)
1025 if ((flag
!= 0) && (flag
!= 1) && (flag
!= 2)) {
1026 printk(KERN_ERR
"Illegal value %d\n", flag
);
1030 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1031 printk(KERN_ERR
"dev[%p]: Unable to change SE Device"
1032 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1034 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1037 dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
= flag
;
1038 printk(KERN_INFO
"dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1039 dev
, dev
->se_sub_dev
->se_dev_attrib
.emulate_ua_intlck_ctrl
);
1044 int se_dev_set_emulate_tas(struct se_device
*dev
, int flag
)
1046 if ((flag
!= 0) && (flag
!= 1)) {
1047 printk(KERN_ERR
"Illegal value %d\n", flag
);
1051 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1052 printk(KERN_ERR
"dev[%p]: Unable to change SE Device TAS while"
1053 " dev_export_obj: %d count exists\n", dev
,
1054 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1057 dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
= flag
;
1058 printk(KERN_INFO
"dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1059 dev
, (dev
->se_sub_dev
->se_dev_attrib
.emulate_tas
) ? "Enabled" : "Disabled");
1064 int se_dev_set_emulate_tpu(struct se_device
*dev
, int flag
)
1066 if ((flag
!= 0) && (flag
!= 1)) {
1067 printk(KERN_ERR
"Illegal value %d\n", flag
);
1071 * We expect this value to be non-zero when generic Block Layer
1072 * Discard supported is detected iblock_create_virtdevice().
1074 if (!(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
)) {
1075 printk(KERN_ERR
"Generic Block Discard not supported\n");
1079 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpu
= flag
;
1080 printk(KERN_INFO
"dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1085 int se_dev_set_emulate_tpws(struct se_device
*dev
, int flag
)
1087 if ((flag
!= 0) && (flag
!= 1)) {
1088 printk(KERN_ERR
"Illegal value %d\n", flag
);
1092 * We expect this value to be non-zero when generic Block Layer
1093 * Discard supported is detected iblock_create_virtdevice().
1095 if (!(dev
->se_sub_dev
->se_dev_attrib
.max_unmap_block_desc_count
)) {
1096 printk(KERN_ERR
"Generic Block Discard not supported\n");
1100 dev
->se_sub_dev
->se_dev_attrib
.emulate_tpws
= flag
;
1101 printk(KERN_INFO
"dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1106 int se_dev_set_enforce_pr_isids(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
.enforce_pr_isids
= flag
;
1113 printk(KERN_INFO
"dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev
,
1114 (dev
->se_sub_dev
->se_dev_attrib
.enforce_pr_isids
) ? "Enabled" : "Disabled");
1119 * Note, this can only be called on unexported SE Device Object.
1121 int se_dev_set_queue_depth(struct se_device
*dev
, u32 queue_depth
)
1123 u32 orig_queue_depth
= dev
->queue_depth
;
1125 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1126 printk(KERN_ERR
"dev[%p]: Unable to change SE Device TCQ while"
1127 " dev_export_obj: %d count exists\n", dev
,
1128 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1131 if (!(queue_depth
)) {
1132 printk(KERN_ERR
"dev[%p]: Illegal ZERO value for queue"
1137 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1138 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
) {
1139 printk(KERN_ERR
"dev[%p]: Passed queue_depth: %u"
1140 " exceeds TCM/SE_Device TCQ: %u\n",
1142 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
);
1146 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.queue_depth
) {
1147 if (queue_depth
> dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
) {
1148 printk(KERN_ERR
"dev[%p]: Passed queue_depth:"
1149 " %u exceeds TCM/SE_Device MAX"
1150 " TCQ: %u\n", dev
, queue_depth
,
1151 dev
->se_sub_dev
->se_dev_attrib
.hw_queue_depth
);
1157 dev
->se_sub_dev
->se_dev_attrib
.queue_depth
= dev
->queue_depth
= queue_depth
;
1158 if (queue_depth
> orig_queue_depth
)
1159 atomic_add(queue_depth
- orig_queue_depth
, &dev
->depth_left
);
1160 else if (queue_depth
< orig_queue_depth
)
1161 atomic_sub(orig_queue_depth
- queue_depth
, &dev
->depth_left
);
1163 printk(KERN_INFO
"dev[%p]: SE Device TCQ Depth changed to: %u\n",
1168 int se_dev_set_max_sectors(struct se_device
*dev
, u32 max_sectors
)
1170 int force
= 0; /* Force setting for VDEVS */
1172 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1173 printk(KERN_ERR
"dev[%p]: Unable to change SE Device"
1174 " max_sectors while dev_export_obj: %d count exists\n",
1175 dev
, atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1178 if (!(max_sectors
)) {
1179 printk(KERN_ERR
"dev[%p]: Illegal ZERO value for"
1180 " max_sectors\n", dev
);
1183 if (max_sectors
< DA_STATUS_MAX_SECTORS_MIN
) {
1184 printk(KERN_ERR
"dev[%p]: Passed max_sectors: %u less than"
1185 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev
, max_sectors
,
1186 DA_STATUS_MAX_SECTORS_MIN
);
1189 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1190 if (max_sectors
> dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
) {
1191 printk(KERN_ERR
"dev[%p]: Passed max_sectors: %u"
1192 " greater than TCM/SE_Device max_sectors:"
1193 " %u\n", dev
, max_sectors
,
1194 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
);
1198 if (!(force
) && (max_sectors
>
1199 dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
)) {
1200 printk(KERN_ERR
"dev[%p]: Passed max_sectors: %u"
1201 " greater than TCM/SE_Device max_sectors"
1202 ": %u, use force=1 to override.\n", dev
,
1203 max_sectors
, dev
->se_sub_dev
->se_dev_attrib
.hw_max_sectors
);
1206 if (max_sectors
> DA_STATUS_MAX_SECTORS_MAX
) {
1207 printk(KERN_ERR
"dev[%p]: Passed max_sectors: %u"
1208 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1209 " %u\n", dev
, max_sectors
,
1210 DA_STATUS_MAX_SECTORS_MAX
);
1215 dev
->se_sub_dev
->se_dev_attrib
.max_sectors
= max_sectors
;
1216 printk("dev[%p]: SE Device max_sectors changed to %u\n",
1221 int se_dev_set_optimal_sectors(struct se_device
*dev
, u32 optimal_sectors
)
1223 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1224 printk(KERN_ERR
"dev[%p]: Unable to change SE Device"
1225 " optimal_sectors while dev_export_obj: %d count exists\n",
1226 dev
, atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1229 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1230 printk(KERN_ERR
"dev[%p]: Passed optimal_sectors cannot be"
1231 " changed for TCM/pSCSI\n", dev
);
1234 if (optimal_sectors
> dev
->se_sub_dev
->se_dev_attrib
.max_sectors
) {
1235 printk(KERN_ERR
"dev[%p]: Passed optimal_sectors %u cannot be"
1236 " greater than max_sectors: %u\n", dev
,
1237 optimal_sectors
, dev
->se_sub_dev
->se_dev_attrib
.max_sectors
);
1241 dev
->se_sub_dev
->se_dev_attrib
.optimal_sectors
= optimal_sectors
;
1242 printk(KERN_INFO
"dev[%p]: SE Device optimal_sectors changed to %u\n",
1243 dev
, optimal_sectors
);
1247 int se_dev_set_block_size(struct se_device
*dev
, u32 block_size
)
1249 if (atomic_read(&dev
->dev_export_obj
.obj_access_count
)) {
1250 printk(KERN_ERR
"dev[%p]: Unable to change SE Device block_size"
1251 " while dev_export_obj: %d count exists\n", dev
,
1252 atomic_read(&dev
->dev_export_obj
.obj_access_count
));
1256 if ((block_size
!= 512) &&
1257 (block_size
!= 1024) &&
1258 (block_size
!= 2048) &&
1259 (block_size
!= 4096)) {
1260 printk(KERN_ERR
"dev[%p]: Illegal value for block_device: %u"
1261 " for SE device, must be 512, 1024, 2048 or 4096\n",
1266 if (dev
->transport
->transport_type
== TRANSPORT_PLUGIN_PHBA_PDEV
) {
1267 printk(KERN_ERR
"dev[%p]: Not allowed to change block_size for"
1268 " Physical Device, use for Linux/SCSI to change"
1269 " block_size for underlying hardware\n", dev
);
1273 dev
->se_sub_dev
->se_dev_attrib
.block_size
= block_size
;
1274 printk(KERN_INFO
"dev[%p]: SE Device block_size changed to %u\n",
1279 struct se_lun
*core_dev_add_lun(
1280 struct se_portal_group
*tpg
,
1282 struct se_device
*dev
,
1285 struct se_lun
*lun_p
;
1288 if (atomic_read(&dev
->dev_access_obj
.obj_access_count
) != 0) {
1289 printk(KERN_ERR
"Unable to export struct se_device while dev_access_obj: %d\n",
1290 atomic_read(&dev
->dev_access_obj
.obj_access_count
));
1294 lun_p
= core_tpg_pre_addlun(tpg
, lun
);
1295 if ((IS_ERR(lun_p
)) || !(lun_p
))
1298 if (dev
->dev_flags
& DF_READ_ONLY
)
1299 lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
1301 lun_access
= TRANSPORT_LUNFLAGS_READ_WRITE
;
1303 if (core_tpg_post_addlun(tpg
, lun_p
, lun_access
, dev
) < 0)
1306 printk(KERN_INFO
"%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1307 " CORE HBA: %u\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1308 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), lun_p
->unpacked_lun
,
1309 tpg
->se_tpg_tfo
->get_fabric_name(), hba
->hba_id
);
1311 * Update LUN maps for dynamically added initiators when
1312 * generate_node_acl is enabled.
1314 if (tpg
->se_tpg_tfo
->tpg_check_demo_mode(tpg
)) {
1315 struct se_node_acl
*acl
;
1316 spin_lock_bh(&tpg
->acl_node_lock
);
1317 list_for_each_entry(acl
, &tpg
->acl_node_list
, acl_list
) {
1318 if (acl
->dynamic_node_acl
) {
1319 spin_unlock_bh(&tpg
->acl_node_lock
);
1320 core_tpg_add_node_to_devs(acl
, tpg
);
1321 spin_lock_bh(&tpg
->acl_node_lock
);
1324 spin_unlock_bh(&tpg
->acl_node_lock
);
1330 /* core_dev_del_lun():
1334 int core_dev_del_lun(
1335 struct se_portal_group
*tpg
,
1341 lun
= core_tpg_pre_dellun(tpg
, unpacked_lun
, &ret
);
1345 core_tpg_post_dellun(tpg
, lun
);
1347 printk(KERN_INFO
"%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1348 " device object\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1349 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), unpacked_lun
,
1350 tpg
->se_tpg_tfo
->get_fabric_name());
1355 struct se_lun
*core_get_lun_from_tpg(struct se_portal_group
*tpg
, u32 unpacked_lun
)
1359 spin_lock(&tpg
->tpg_lun_lock
);
1360 if (unpacked_lun
> (TRANSPORT_MAX_LUNS_PER_TPG
-1)) {
1361 printk(KERN_ERR
"%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1362 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1363 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1364 TRANSPORT_MAX_LUNS_PER_TPG
-1,
1365 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1366 spin_unlock(&tpg
->tpg_lun_lock
);
1369 lun
= &tpg
->tpg_lun_list
[unpacked_lun
];
1371 if (lun
->lun_status
!= TRANSPORT_LUN_STATUS_FREE
) {
1372 printk(KERN_ERR
"%s Logical Unit Number: %u is not free on"
1373 " Target Portal Group: %hu, ignoring request.\n",
1374 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1375 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1376 spin_unlock(&tpg
->tpg_lun_lock
);
1379 spin_unlock(&tpg
->tpg_lun_lock
);
1384 /* core_dev_get_lun():
1388 static struct se_lun
*core_dev_get_lun(struct se_portal_group
*tpg
, u32 unpacked_lun
)
1392 spin_lock(&tpg
->tpg_lun_lock
);
1393 if (unpacked_lun
> (TRANSPORT_MAX_LUNS_PER_TPG
-1)) {
1394 printk(KERN_ERR
"%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1395 "_TPG-1: %u for Target Portal Group: %hu\n",
1396 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1397 TRANSPORT_MAX_LUNS_PER_TPG
-1,
1398 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1399 spin_unlock(&tpg
->tpg_lun_lock
);
1402 lun
= &tpg
->tpg_lun_list
[unpacked_lun
];
1404 if (lun
->lun_status
!= TRANSPORT_LUN_STATUS_ACTIVE
) {
1405 printk(KERN_ERR
"%s Logical Unit Number: %u is not active on"
1406 " Target Portal Group: %hu, ignoring request.\n",
1407 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1408 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1409 spin_unlock(&tpg
->tpg_lun_lock
);
1412 spin_unlock(&tpg
->tpg_lun_lock
);
1417 struct se_lun_acl
*core_dev_init_initiator_node_lun_acl(
1418 struct se_portal_group
*tpg
,
1420 char *initiatorname
,
1423 struct se_lun_acl
*lacl
;
1424 struct se_node_acl
*nacl
;
1426 if (strlen(initiatorname
) >= TRANSPORT_IQN_LEN
) {
1427 printk(KERN_ERR
"%s InitiatorName exceeds maximum size.\n",
1428 tpg
->se_tpg_tfo
->get_fabric_name());
1432 nacl
= core_tpg_get_initiator_node_acl(tpg
, initiatorname
);
1437 lacl
= kzalloc(sizeof(struct se_lun_acl
), GFP_KERNEL
);
1439 printk(KERN_ERR
"Unable to allocate memory for struct se_lun_acl.\n");
1444 INIT_LIST_HEAD(&lacl
->lacl_list
);
1445 lacl
->mapped_lun
= mapped_lun
;
1446 lacl
->se_lun_nacl
= nacl
;
1447 snprintf(lacl
->initiatorname
, TRANSPORT_IQN_LEN
, "%s", initiatorname
);
1452 int core_dev_add_initiator_node_lun_acl(
1453 struct se_portal_group
*tpg
,
1454 struct se_lun_acl
*lacl
,
1459 struct se_node_acl
*nacl
;
1461 lun
= core_dev_get_lun(tpg
, unpacked_lun
);
1463 printk(KERN_ERR
"%s Logical Unit Number: %u is not active on"
1464 " Target Portal Group: %hu, ignoring request.\n",
1465 tpg
->se_tpg_tfo
->get_fabric_name(), unpacked_lun
,
1466 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
));
1470 nacl
= lacl
->se_lun_nacl
;
1474 if ((lun
->lun_access
& TRANSPORT_LUNFLAGS_READ_ONLY
) &&
1475 (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
))
1476 lun_access
= TRANSPORT_LUNFLAGS_READ_ONLY
;
1480 if (core_update_device_list_for_node(lun
, lacl
, lacl
->mapped_lun
,
1481 lun_access
, nacl
, tpg
, 1) < 0)
1484 spin_lock(&lun
->lun_acl_lock
);
1485 list_add_tail(&lacl
->lacl_list
, &lun
->lun_acl_list
);
1486 atomic_inc(&lun
->lun_acl_count
);
1487 smp_mb__after_atomic_inc();
1488 spin_unlock(&lun
->lun_acl_lock
);
1490 printk(KERN_INFO
"%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1491 " InitiatorNode: %s\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1492 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), unpacked_lun
, lacl
->mapped_lun
,
1493 (lun_access
& TRANSPORT_LUNFLAGS_READ_WRITE
) ? "RW" : "RO",
1494 lacl
->initiatorname
);
1496 * Check to see if there are any existing persistent reservation APTPL
1497 * pre-registrations that need to be enabled for this LUN ACL..
1499 core_scsi3_check_aptpl_registration(lun
->lun_se_dev
, tpg
, lun
, lacl
);
1503 /* core_dev_del_initiator_node_lun_acl():
1507 int core_dev_del_initiator_node_lun_acl(
1508 struct se_portal_group
*tpg
,
1510 struct se_lun_acl
*lacl
)
1512 struct se_node_acl
*nacl
;
1514 nacl
= lacl
->se_lun_nacl
;
1518 spin_lock(&lun
->lun_acl_lock
);
1519 list_del(&lacl
->lacl_list
);
1520 atomic_dec(&lun
->lun_acl_count
);
1521 smp_mb__after_atomic_dec();
1522 spin_unlock(&lun
->lun_acl_lock
);
1524 core_update_device_list_for_node(lun
, NULL
, lacl
->mapped_lun
,
1525 TRANSPORT_LUNFLAGS_NO_ACCESS
, nacl
, tpg
, 0);
1527 lacl
->se_lun
= NULL
;
1529 printk(KERN_INFO
"%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1530 " InitiatorNode: %s Mapped LUN: %u\n",
1531 tpg
->se_tpg_tfo
->get_fabric_name(),
1532 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
), lun
->unpacked_lun
,
1533 lacl
->initiatorname
, lacl
->mapped_lun
);
1538 void core_dev_free_initiator_node_lun_acl(
1539 struct se_portal_group
*tpg
,
1540 struct se_lun_acl
*lacl
)
1542 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1543 " Mapped LUN: %u\n", tpg
->se_tpg_tfo
->get_fabric_name(),
1544 tpg
->se_tpg_tfo
->tpg_get_tag(tpg
),
1545 tpg
->se_tpg_tfo
->get_fabric_name(),
1546 lacl
->initiatorname
, lacl
->mapped_lun
);
1551 int core_dev_setup_virtual_lun0(void)
1554 struct se_device
*dev
;
1555 struct se_subsystem_dev
*se_dev
= NULL
;
1556 struct se_subsystem_api
*t
;
1560 hba
= core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE
);
1562 return PTR_ERR(hba
);
1567 se_dev
= kzalloc(sizeof(struct se_subsystem_dev
), GFP_KERNEL
);
1569 printk(KERN_ERR
"Unable to allocate memory for"
1570 " struct se_subsystem_dev\n");
1574 INIT_LIST_HEAD(&se_dev
->se_dev_node
);
1575 INIT_LIST_HEAD(&se_dev
->t10_wwn
.t10_vpd_list
);
1576 spin_lock_init(&se_dev
->t10_wwn
.t10_vpd_lock
);
1577 INIT_LIST_HEAD(&se_dev
->t10_pr
.registration_list
);
1578 INIT_LIST_HEAD(&se_dev
->t10_pr
.aptpl_reg_list
);
1579 spin_lock_init(&se_dev
->t10_pr
.registration_lock
);
1580 spin_lock_init(&se_dev
->t10_pr
.aptpl_reg_lock
);
1581 INIT_LIST_HEAD(&se_dev
->t10_alua
.tg_pt_gps_list
);
1582 spin_lock_init(&se_dev
->t10_alua
.tg_pt_gps_lock
);
1583 spin_lock_init(&se_dev
->se_dev_lock
);
1584 se_dev
->t10_pr
.pr_aptpl_buf_len
= PR_APTPL_BUF_LEN
;
1585 se_dev
->t10_wwn
.t10_sub_dev
= se_dev
;
1586 se_dev
->t10_alua
.t10_sub_dev
= se_dev
;
1587 se_dev
->se_dev_attrib
.da_sub_dev
= se_dev
;
1588 se_dev
->se_dev_hba
= hba
;
1590 se_dev
->se_dev_su_ptr
= t
->allocate_virtdevice(hba
, "virt_lun0");
1591 if (!(se_dev
->se_dev_su_ptr
)) {
1592 printk(KERN_ERR
"Unable to locate subsystem dependent pointer"
1593 " from allocate_virtdevice()\n");
1597 lun0_su_dev
= se_dev
;
1600 sprintf(buf
, "rd_pages=8");
1601 t
->set_configfs_dev_params(hba
, se_dev
, buf
, sizeof(buf
));
1603 dev
= t
->create_virtdevice(hba
, se_dev
, se_dev
->se_dev_su_ptr
);
1608 se_dev
->se_dev_ptr
= dev
;
1616 core_delete_hba(lun0_hba
);
1623 void core_dev_release_virtual_lun0(void)
1625 struct se_hba
*hba
= lun0_hba
;
1626 struct se_subsystem_dev
*su_dev
= lun0_su_dev
;
1632 se_free_virtual_device(g_lun0_dev
, hba
);
1635 core_delete_hba(hba
);