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[SCSI] target: Add LIO target core v4.0.0-rc6
[mirror_ubuntu-zesty-kernel.git] / drivers / target / target_core_device.c
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c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
4 * This file contains the iSCSI Virtual Device and Disk Transport
5 * agnostic related functions.
6 *
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
11 *
12 * Nicholas A. Bellinger <nab@kernel.org>
13 *
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.
18 *
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.
23 *
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.
27 *
28 ******************************************************************************/
29
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/smp_lock.h>
37#include <linux/kthread.h>
38#include <linux/in.h>
39#include <net/sock.h>
40#include <net/tcp.h>
41#include <scsi/scsi.h>
42
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>
48
49#include "target_core_alua.h"
50#include "target_core_hba.h"
51#include "target_core_pr.h"
52#include "target_core_ua.h"
53
54static void se_dev_start(struct se_device *dev);
55static void se_dev_stop(struct se_device *dev);
56
57int transport_get_lun_for_cmd(
58 struct se_cmd *se_cmd,
59 unsigned char *cdb,
60 u32 unpacked_lun)
61{
62 struct se_dev_entry *deve;
63 struct se_lun *se_lun = NULL;
64 struct se_session *se_sess = SE_SESS(se_cmd);
65 unsigned long flags;
66 int read_only = 0;
67
68 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
69 deve = se_cmd->se_deve =
70 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
71 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
72 if (se_cmd) {
73 deve->total_cmds++;
74 deve->total_bytes += se_cmd->data_length;
75
76 if (se_cmd->data_direction == DMA_TO_DEVICE) {
77 if (deve->lun_flags &
78 TRANSPORT_LUNFLAGS_READ_ONLY) {
79 read_only = 1;
80 goto out;
81 }
82 deve->write_bytes += se_cmd->data_length;
83 } else if (se_cmd->data_direction ==
84 DMA_FROM_DEVICE) {
85 deve->read_bytes += se_cmd->data_length;
86 }
87 }
88 deve->deve_cmds++;
89
90 se_lun = se_cmd->se_lun = deve->se_lun;
91 se_cmd->pr_res_key = deve->pr_res_key;
92 se_cmd->orig_fe_lun = unpacked_lun;
93 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
95 }
96out:
97 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
98
99 if (!se_lun) {
100 if (read_only) {
101 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
102 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
103 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
104 " Access for 0x%08x\n",
105 CMD_TFO(se_cmd)->get_fabric_name(),
106 unpacked_lun);
107 return -1;
108 } else {
109 /*
110 * Use the se_portal_group->tpg_virt_lun0 to allow for
111 * REPORT_LUNS, et al to be returned when no active
112 * MappedLUN=0 exists for this Initiator Port.
113 */
114 if (unpacked_lun != 0) {
115 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
116 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
117 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
118 " Access for 0x%08x\n",
119 CMD_TFO(se_cmd)->get_fabric_name(),
120 unpacked_lun);
121 return -1;
122 }
123 /*
124 * Force WRITE PROTECT for virtual LUN 0
125 */
126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
127 (se_cmd->data_direction != DMA_NONE)) {
128 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
129 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
130 return -1;
131 }
132#if 0
133 printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
134 CMD_TFO(se_cmd)->get_fabric_name());
135#endif
136 se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
137 se_cmd->orig_fe_lun = 0;
138 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
139 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
140 }
141 }
142 /*
143 * Determine if the struct se_lun is online.
144 */
145/* #warning 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;
149 return -1;
150 }
151
152 {
153 struct se_device *dev = se_lun->lun_se_dev;
154 spin_lock(&dev->stats_lock);
155 dev->num_cmds++;
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(&dev->stats_lock);
161 }
162
163 /*
164 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
165 * for tracking state of struct se_cmds during LUN shutdown events.
166 */
167 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
168 list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
169 atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
170#if 0
171 printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
172 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
173#endif
174 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
175
176 return 0;
177}
178EXPORT_SYMBOL(transport_get_lun_for_cmd);
179
180int transport_get_lun_for_tmr(
181 struct se_cmd *se_cmd,
182 u32 unpacked_lun)
183{
184 struct se_device *dev = NULL;
185 struct se_dev_entry *deve;
186 struct se_lun *se_lun = NULL;
187 struct se_session *se_sess = SE_SESS(se_cmd);
188 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
189
190 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
191 deve = se_cmd->se_deve =
192 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
193 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
194 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
195 dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
196 se_cmd->pr_res_key = deve->pr_res_key;
197 se_cmd->orig_fe_lun = unpacked_lun;
198 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
199/* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
200 }
201 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
202
203 if (!se_lun) {
204 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
205 " Access for 0x%08x\n",
206 CMD_TFO(se_cmd)->get_fabric_name(),
207 unpacked_lun);
208 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
209 return -1;
210 }
211 /*
212 * Determine if the struct se_lun is online.
213 */
214/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
215 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
216 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
217 return -1;
218 }
219
220 spin_lock(&dev->se_tmr_lock);
221 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
222 spin_unlock(&dev->se_tmr_lock);
223
224 return 0;
225}
226EXPORT_SYMBOL(transport_get_lun_for_tmr);
227
228/*
229 * This function is called from core_scsi3_emulate_pro_register_and_move()
230 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
231 * when a matching rtpi is found.
232 */
233struct se_dev_entry *core_get_se_deve_from_rtpi(
234 struct se_node_acl *nacl,
235 u16 rtpi)
236{
237 struct se_dev_entry *deve;
238 struct se_lun *lun;
239 struct se_port *port;
240 struct se_portal_group *tpg = nacl->se_tpg;
241 u32 i;
242
243 spin_lock_irq(&nacl->device_list_lock);
244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
245 deve = &nacl->device_list[i];
246
247 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
248 continue;
249
250 lun = deve->se_lun;
251 if (!(lun)) {
252 printk(KERN_ERR "%s device entries device pointer is"
253 " NULL, but Initiator has access.\n",
254 TPG_TFO(tpg)->get_fabric_name());
255 continue;
256 }
257 port = lun->lun_sep;
258 if (!(port)) {
259 printk(KERN_ERR "%s device entries device pointer is"
260 " NULL, but Initiator has access.\n",
261 TPG_TFO(tpg)->get_fabric_name());
262 continue;
263 }
264 if (port->sep_rtpi != rtpi)
265 continue;
266
267 atomic_inc(&deve->pr_ref_count);
268 smp_mb__after_atomic_inc();
269 spin_unlock_irq(&nacl->device_list_lock);
270
271 return deve;
272 }
273 spin_unlock_irq(&nacl->device_list_lock);
274
275 return NULL;
276}
277
278int core_free_device_list_for_node(
279 struct se_node_acl *nacl,
280 struct se_portal_group *tpg)
281{
282 struct se_dev_entry *deve;
283 struct se_lun *lun;
284 u32 i;
285
286 if (!nacl->device_list)
287 return 0;
288
289 spin_lock_irq(&nacl->device_list_lock);
290 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
291 deve = &nacl->device_list[i];
292
293 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
294 continue;
295
296 if (!deve->se_lun) {
297 printk(KERN_ERR "%s device entries device pointer is"
298 " NULL, but Initiator has access.\n",
299 TPG_TFO(tpg)->get_fabric_name());
300 continue;
301 }
302 lun = deve->se_lun;
303
304 spin_unlock_irq(&nacl->device_list_lock);
305 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
306 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
307 spin_lock_irq(&nacl->device_list_lock);
308 }
309 spin_unlock_irq(&nacl->device_list_lock);
310
311 kfree(nacl->device_list);
312 nacl->device_list = NULL;
313
314 return 0;
315}
316
317void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
318{
319 struct se_dev_entry *deve;
320
321 spin_lock_irq(&se_nacl->device_list_lock);
322 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
323 deve->deve_cmds--;
324 spin_unlock_irq(&se_nacl->device_list_lock);
325
326 return;
327}
328
329void core_update_device_list_access(
330 u32 mapped_lun,
331 u32 lun_access,
332 struct se_node_acl *nacl)
333{
334 struct se_dev_entry *deve;
335
336 spin_lock_irq(&nacl->device_list_lock);
337 deve = &nacl->device_list[mapped_lun];
338 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
341 } else {
342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
344 }
345 spin_unlock_irq(&nacl->device_list_lock);
346
347 return;
348}
349
350/* core_update_device_list_for_node():
351 *
352 *
353 */
354int core_update_device_list_for_node(
355 struct se_lun *lun,
356 struct se_lun_acl *lun_acl,
357 u32 mapped_lun,
358 u32 lun_access,
359 struct se_node_acl *nacl,
360 struct se_portal_group *tpg,
361 int enable)
362{
363 struct se_port *port = lun->lun_sep;
364 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
365 int trans = 0;
366 /*
367 * If the MappedLUN entry is being disabled, the entry in
368 * port->sep_alua_list must be removed now before clearing the
369 * struct se_dev_entry pointers below as logic in
370 * core_alua_do_transition_tg_pt() depends on these being present.
371 */
372 if (!(enable)) {
373 /*
374 * deve->se_lun_acl will be NULL for demo-mode created LUNs
375 * that have not been explictly concerted to MappedLUNs ->
376 * struct se_lun_acl.
377 */
378 if (!(deve->se_lun_acl))
379 return 0;
380
381 spin_lock_bh(&port->sep_alua_lock);
382 list_del(&deve->alua_port_list);
383 spin_unlock_bh(&port->sep_alua_lock);
384 }
385
386 spin_lock_irq(&nacl->device_list_lock);
387 if (enable) {
388 /*
389 * Check if the call is handling demo mode -> explict LUN ACL
390 * transition. This transition must be for the same struct se_lun
391 * + mapped_lun that was setup in demo mode..
392 */
393 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
394 if (deve->se_lun_acl != NULL) {
395 printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
396 " already set for demo mode -> explict"
397 " LUN ACL transition\n");
398 return -1;
399 }
400 if (deve->se_lun != lun) {
401 printk(KERN_ERR "struct se_dev_entry->se_lun does"
402 " match passed struct se_lun for demo mode"
403 " -> explict LUN ACL transition\n");
404 return -1;
405 }
406 deve->se_lun_acl = lun_acl;
407 trans = 1;
408 } else {
409 deve->se_lun = lun;
410 deve->se_lun_acl = lun_acl;
411 deve->mapped_lun = mapped_lun;
412 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
413 }
414
415 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
416 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
417 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
418 } else {
419 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
420 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
421 }
422
423 if (trans) {
424 spin_unlock_irq(&nacl->device_list_lock);
425 return 0;
426 }
427 deve->creation_time = get_jiffies_64();
428 deve->attach_count++;
429 spin_unlock_irq(&nacl->device_list_lock);
430
431 spin_lock_bh(&port->sep_alua_lock);
432 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
433 spin_unlock_bh(&port->sep_alua_lock);
434
435 return 0;
436 }
437 /*
438 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
439 * PR operation to complete.
440 */
441 spin_unlock_irq(&nacl->device_list_lock);
442 while (atomic_read(&deve->pr_ref_count) != 0)
443 cpu_relax();
444 spin_lock_irq(&nacl->device_list_lock);
445 /*
446 * Disable struct se_dev_entry LUN ACL mapping
447 */
448 core_scsi3_ua_release_all(deve);
449 deve->se_lun = NULL;
450 deve->se_lun_acl = NULL;
451 deve->lun_flags = 0;
452 deve->creation_time = 0;
453 deve->attach_count--;
454 spin_unlock_irq(&nacl->device_list_lock);
455
456 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
457 return 0;
458}
459
460/* core_clear_lun_from_tpg():
461 *
462 *
463 */
464void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
465{
466 struct se_node_acl *nacl;
467 struct se_dev_entry *deve;
468 u32 i;
469
470 spin_lock_bh(&tpg->acl_node_lock);
471 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
472 spin_unlock_bh(&tpg->acl_node_lock);
473
474 spin_lock_irq(&nacl->device_list_lock);
475 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
476 deve = &nacl->device_list[i];
477 if (lun != deve->se_lun)
478 continue;
479 spin_unlock_irq(&nacl->device_list_lock);
480
481 core_update_device_list_for_node(lun, NULL,
482 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
483 nacl, tpg, 0);
484
485 spin_lock_irq(&nacl->device_list_lock);
486 }
487 spin_unlock_irq(&nacl->device_list_lock);
488
489 spin_lock_bh(&tpg->acl_node_lock);
490 }
491 spin_unlock_bh(&tpg->acl_node_lock);
492
493 return;
494}
495
496static struct se_port *core_alloc_port(struct se_device *dev)
497{
498 struct se_port *port, *port_tmp;
499
500 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
501 if (!(port)) {
502 printk(KERN_ERR "Unable to allocate struct se_port\n");
503 return NULL;
504 }
505 INIT_LIST_HEAD(&port->sep_alua_list);
506 INIT_LIST_HEAD(&port->sep_list);
507 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
508 spin_lock_init(&port->sep_alua_lock);
509 mutex_init(&port->sep_tg_pt_md_mutex);
510
511 spin_lock(&dev->se_port_lock);
512 if (dev->dev_port_count == 0x0000ffff) {
513 printk(KERN_WARNING "Reached dev->dev_port_count =="
514 " 0x0000ffff\n");
515 spin_unlock(&dev->se_port_lock);
516 return NULL;
517 }
518again:
519 /*
520 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
521 * Here is the table from spc4r17 section 7.7.3.8.
522 *
523 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
524 *
525 * Code Description
526 * 0h Reserved
527 * 1h Relative port 1, historically known as port A
528 * 2h Relative port 2, historically known as port B
529 * 3h to FFFFh Relative port 3 through 65 535
530 */
531 port->sep_rtpi = dev->dev_rpti_counter++;
532 if (!(port->sep_rtpi))
533 goto again;
534
535 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
536 /*
537 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
538 * for 16-bit wrap..
539 */
540 if (port->sep_rtpi == port_tmp->sep_rtpi)
541 goto again;
542 }
543 spin_unlock(&dev->se_port_lock);
544
545 return port;
546}
547
548static void core_export_port(
549 struct se_device *dev,
550 struct se_portal_group *tpg,
551 struct se_port *port,
552 struct se_lun *lun)
553{
554 struct se_subsystem_dev *su_dev = SU_DEV(dev);
555 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
556
557 spin_lock(&dev->se_port_lock);
558 spin_lock(&lun->lun_sep_lock);
559 port->sep_tpg = tpg;
560 port->sep_lun = lun;
561 lun->lun_sep = port;
562 spin_unlock(&lun->lun_sep_lock);
563
564 list_add_tail(&port->sep_list, &dev->dev_sep_list);
565 spin_unlock(&dev->se_port_lock);
566
567 if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
568 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
569 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
570 printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
571 "_gp_member_t\n");
572 return;
573 }
574 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
575 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
576 T10_ALUA(su_dev)->default_tg_pt_gp);
577 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
578 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
579 " Group: alua/default_tg_pt_gp\n",
580 TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
581 }
582
583 dev->dev_port_count++;
584 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
585}
586
587/*
588 * Called with struct se_device->se_port_lock spinlock held.
589 */
590static void core_release_port(struct se_device *dev, struct se_port *port)
591{
592 /*
593 * Wait for any port reference for PR ALL_TG_PT=1 operation
594 * to complete in __core_scsi3_alloc_registration()
595 */
596 spin_unlock(&dev->se_port_lock);
597 if (atomic_read(&port->sep_tg_pt_ref_cnt))
598 cpu_relax();
599 spin_lock(&dev->se_port_lock);
600
601 core_alua_free_tg_pt_gp_mem(port);
602
603 list_del(&port->sep_list);
604 dev->dev_port_count--;
605 kfree(port);
606
607 return;
608}
609
610int core_dev_export(
611 struct se_device *dev,
612 struct se_portal_group *tpg,
613 struct se_lun *lun)
614{
615 struct se_port *port;
616
617 port = core_alloc_port(dev);
618 if (!(port))
619 return -1;
620
621 lun->lun_se_dev = dev;
622 se_dev_start(dev);
623
624 atomic_inc(&dev->dev_export_obj.obj_access_count);
625 core_export_port(dev, tpg, port, lun);
626 return 0;
627}
628
629void core_dev_unexport(
630 struct se_device *dev,
631 struct se_portal_group *tpg,
632 struct se_lun *lun)
633{
634 struct se_port *port = lun->lun_sep;
635
636 spin_lock(&lun->lun_sep_lock);
637 if (lun->lun_se_dev == NULL) {
638 spin_unlock(&lun->lun_sep_lock);
639 return;
640 }
641 spin_unlock(&lun->lun_sep_lock);
642
643 spin_lock(&dev->se_port_lock);
644 atomic_dec(&dev->dev_export_obj.obj_access_count);
645 core_release_port(dev, port);
646 spin_unlock(&dev->se_port_lock);
647
648 se_dev_stop(dev);
649 lun->lun_se_dev = NULL;
650}
651
652int transport_core_report_lun_response(struct se_cmd *se_cmd)
653{
654 struct se_dev_entry *deve;
655 struct se_lun *se_lun;
656 struct se_session *se_sess = SE_SESS(se_cmd);
657 struct se_task *se_task;
658 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
659 u32 cdb_offset = 0, lun_count = 0, offset = 8;
660 u64 i, lun;
661
662 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
663 break;
664
665 if (!(se_task)) {
666 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
667 return PYX_TRANSPORT_LU_COMM_FAILURE;
668 }
669
670 /*
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.
674 */
675 if (!(se_sess)) {
676 lun = 0;
677 buf[offset++] = ((lun >> 56) & 0xff);
678 buf[offset++] = ((lun >> 48) & 0xff);
679 buf[offset++] = ((lun >> 40) & 0xff);
680 buf[offset++] = ((lun >> 32) & 0xff);
681 buf[offset++] = ((lun >> 24) & 0xff);
682 buf[offset++] = ((lun >> 16) & 0xff);
683 buf[offset++] = ((lun >> 8) & 0xff);
684 buf[offset++] = (lun & 0xff);
685 lun_count = 1;
686 goto done;
687 }
688
689 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
690 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
691 deve = &SE_NODE_ACL(se_sess)->device_list[i];
692 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
693 continue;
694 se_lun = deve->se_lun;
695 /*
696 * We determine the correct LUN LIST LENGTH even once we
697 * have reached the initial allocation length.
698 * See SPC2-R20 7.19.
699 */
700 lun_count++;
701 if ((cdb_offset + 8) >= se_cmd->data_length)
702 continue;
703
704 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
705 buf[offset++] = ((lun >> 56) & 0xff);
706 buf[offset++] = ((lun >> 48) & 0xff);
707 buf[offset++] = ((lun >> 40) & 0xff);
708 buf[offset++] = ((lun >> 32) & 0xff);
709 buf[offset++] = ((lun >> 24) & 0xff);
710 buf[offset++] = ((lun >> 16) & 0xff);
711 buf[offset++] = ((lun >> 8) & 0xff);
712 buf[offset++] = (lun & 0xff);
713 cdb_offset += 8;
714 }
715 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
716
717 /*
718 * See SPC3 r07, page 159.
719 */
720done:
721 lun_count *= 8;
722 buf[0] = ((lun_count >> 24) & 0xff);
723 buf[1] = ((lun_count >> 16) & 0xff);
724 buf[2] = ((lun_count >> 8) & 0xff);
725 buf[3] = (lun_count & 0xff);
726
727 return PYX_TRANSPORT_SENT_TO_TRANSPORT;
728}
729
730/* se_release_device_for_hba():
731 *
732 *
733 */
734void se_release_device_for_hba(struct se_device *dev)
735{
736 struct se_hba *hba = dev->se_hba;
737
738 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
739 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
740 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
741 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
742 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
743 se_dev_stop(dev);
744
745 if (dev->dev_ptr) {
746 kthread_stop(dev->process_thread);
747 if (dev->transport->free_device)
748 dev->transport->free_device(dev->dev_ptr);
749 }
750
751 spin_lock(&hba->device_lock);
752 list_del(&dev->dev_list);
753 hba->dev_count--;
754 spin_unlock(&hba->device_lock);
755
756 core_scsi3_free_all_registrations(dev);
757 se_release_vpd_for_dev(dev);
758
759 kfree(dev->dev_status_queue_obj);
760 kfree(dev->dev_queue_obj);
761 kfree(dev);
762
763 return;
764}
765
766void se_release_vpd_for_dev(struct se_device *dev)
767{
768 struct t10_vpd *vpd, *vpd_tmp;
769
770 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
771 list_for_each_entry_safe(vpd, vpd_tmp,
772 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
773 list_del(&vpd->vpd_list);
774 kfree(vpd);
775 }
776 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
777
778 return;
779}
780
781/*
782 * Called with struct se_hba->device_lock held.
783 */
784void se_clear_dev_ports(struct se_device *dev)
785{
786 struct se_hba *hba = dev->se_hba;
787 struct se_lun *lun;
788 struct se_portal_group *tpg;
789 struct se_port *sep, *sep_tmp;
790
791 spin_lock(&dev->se_port_lock);
792 list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
793 spin_unlock(&dev->se_port_lock);
794 spin_unlock(&hba->device_lock);
795
796 lun = sep->sep_lun;
797 tpg = sep->sep_tpg;
798 spin_lock(&lun->lun_sep_lock);
799 if (lun->lun_se_dev == NULL) {
800 spin_unlock(&lun->lun_sep_lock);
801 continue;
802 }
803 spin_unlock(&lun->lun_sep_lock);
804
805 core_dev_del_lun(tpg, lun->unpacked_lun);
806
807 spin_lock(&hba->device_lock);
808 spin_lock(&dev->se_port_lock);
809 }
810 spin_unlock(&dev->se_port_lock);
811
812 return;
813}
814
815/* se_free_virtual_device():
816 *
817 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
818 */
819int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
820{
821 spin_lock(&hba->device_lock);
822 se_clear_dev_ports(dev);
823 spin_unlock(&hba->device_lock);
824
825 core_alua_free_lu_gp_mem(dev);
826 se_release_device_for_hba(dev);
827
828 return 0;
829}
830
831static void se_dev_start(struct se_device *dev)
832{
833 struct se_hba *hba = dev->se_hba;
834
835 spin_lock(&hba->device_lock);
836 atomic_inc(&dev->dev_obj.obj_access_count);
837 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
838 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
839 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
840 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
841 } else if (dev->dev_status &
842 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
843 dev->dev_status &=
844 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
845 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
846 }
847 }
848 spin_unlock(&hba->device_lock);
849}
850
851static void se_dev_stop(struct se_device *dev)
852{
853 struct se_hba *hba = dev->se_hba;
854
855 spin_lock(&hba->device_lock);
856 atomic_dec(&dev->dev_obj.obj_access_count);
857 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
858 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
859 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
860 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
861 } else if (dev->dev_status &
862 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
863 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
864 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
865 }
866 }
867 spin_unlock(&hba->device_lock);
868
869 while (atomic_read(&hba->dev_mib_access_count))
870 cpu_relax();
871}
872
873int se_dev_check_online(struct se_device *dev)
874{
875 int ret;
876
877 spin_lock_irq(&dev->dev_status_lock);
878 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
879 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
880 spin_unlock_irq(&dev->dev_status_lock);
881
882 return ret;
883}
884
885int se_dev_check_shutdown(struct se_device *dev)
886{
887 int ret;
888
889 spin_lock_irq(&dev->dev_status_lock);
890 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
891 spin_unlock_irq(&dev->dev_status_lock);
892
893 return ret;
894}
895
896void se_dev_set_default_attribs(
897 struct se_device *dev,
898 struct se_dev_limits *dev_limits)
899{
900 struct queue_limits *limits = &dev_limits->limits;
901
902 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
903 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
904 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
905 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
906 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
907 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
908 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
909 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
910 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
911 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
912 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
913 /*
914 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
915 * iblock_create_virtdevice() from struct queue_limits values
916 * if blk_queue_discard()==1
917 */
918 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
919 DEV_ATTRIB(dev)->max_unmap_block_desc_count =
920 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
921 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
922 DEV_ATTRIB(dev)->unmap_granularity_alignment =
923 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
924 /*
925 * block_size is based on subsystem plugin dependent requirements.
926 */
927 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
928 DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
929 /*
930 * max_sectors is based on subsystem plugin dependent requirements.
931 */
932 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
933 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
934 /*
935 * Set optimal_sectors from max_sectors, which can be lowered via
936 * configfs.
937 */
938 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
939 /*
940 * queue_depth is based on subsystem plugin dependent requirements.
941 */
942 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
943 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
944}
945
946int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
947{
948 if (task_timeout > DA_TASK_TIMEOUT_MAX) {
949 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
950 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
951 return -1;
952 } else {
953 DEV_ATTRIB(dev)->task_timeout = task_timeout;
954 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
955 dev, task_timeout);
956 }
957
958 return 0;
959}
960
961int se_dev_set_max_unmap_lba_count(
962 struct se_device *dev,
963 u32 max_unmap_lba_count)
964{
965 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
966 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
967 dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
968 return 0;
969}
970
971int se_dev_set_max_unmap_block_desc_count(
972 struct se_device *dev,
973 u32 max_unmap_block_desc_count)
974{
975 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
976 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
977 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
978 return 0;
979}
980
981int se_dev_set_unmap_granularity(
982 struct se_device *dev,
983 u32 unmap_granularity)
984{
985 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
986 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
987 dev, DEV_ATTRIB(dev)->unmap_granularity);
988 return 0;
989}
990
991int se_dev_set_unmap_granularity_alignment(
992 struct se_device *dev,
993 u32 unmap_granularity_alignment)
994{
995 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
996 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
997 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
998 return 0;
999}
1000
1001int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
1002{
1003 if ((flag != 0) && (flag != 1)) {
1004 printk(KERN_ERR "Illegal value %d\n", flag);
1005 return -1;
1006 }
1007 if (TRANSPORT(dev)->dpo_emulated == NULL) {
1008 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
1009 return -1;
1010 }
1011 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
1012 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
1013 return -1;
1014 }
1015 DEV_ATTRIB(dev)->emulate_dpo = flag;
1016 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
1017 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
1018 return 0;
1019}
1020
1021int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
1022{
1023 if ((flag != 0) && (flag != 1)) {
1024 printk(KERN_ERR "Illegal value %d\n", flag);
1025 return -1;
1026 }
1027 if (TRANSPORT(dev)->fua_write_emulated == NULL) {
1028 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
1029 return -1;
1030 }
1031 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
1032 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
1033 return -1;
1034 }
1035 DEV_ATTRIB(dev)->emulate_fua_write = flag;
1036 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
1037 dev, DEV_ATTRIB(dev)->emulate_fua_write);
1038 return 0;
1039}
1040
1041int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
1042{
1043 if ((flag != 0) && (flag != 1)) {
1044 printk(KERN_ERR "Illegal value %d\n", flag);
1045 return -1;
1046 }
1047 if (TRANSPORT(dev)->fua_read_emulated == NULL) {
1048 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
1049 return -1;
1050 }
1051 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
1052 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
1053 return -1;
1054 }
1055 DEV_ATTRIB(dev)->emulate_fua_read = flag;
1056 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
1057 dev, DEV_ATTRIB(dev)->emulate_fua_read);
1058 return 0;
1059}
1060
1061int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1062{
1063 if ((flag != 0) && (flag != 1)) {
1064 printk(KERN_ERR "Illegal value %d\n", flag);
1065 return -1;
1066 }
1067 if (TRANSPORT(dev)->write_cache_emulated == NULL) {
1068 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
1069 return -1;
1070 }
1071 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
1072 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
1073 return -1;
1074 }
1075 DEV_ATTRIB(dev)->emulate_write_cache = flag;
1076 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1077 dev, DEV_ATTRIB(dev)->emulate_write_cache);
1078 return 0;
1079}
1080
1081int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1082{
1083 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1084 printk(KERN_ERR "Illegal value %d\n", flag);
1085 return -1;
1086 }
1087
1088 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1089 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1090 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1091 " exists\n", dev,
1092 atomic_read(&dev->dev_export_obj.obj_access_count));
1093 return -1;
1094 }
1095 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
1096 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1097 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
1098
1099 return 0;
1100}
1101
1102int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1103{
1104 if ((flag != 0) && (flag != 1)) {
1105 printk(KERN_ERR "Illegal value %d\n", flag);
1106 return -1;
1107 }
1108
1109 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1110 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
1111 " dev_export_obj: %d count exists\n", dev,
1112 atomic_read(&dev->dev_export_obj.obj_access_count));
1113 return -1;
1114 }
1115 DEV_ATTRIB(dev)->emulate_tas = flag;
1116 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1117 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
1118
1119 return 0;
1120}
1121
1122int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1123{
1124 if ((flag != 0) && (flag != 1)) {
1125 printk(KERN_ERR "Illegal value %d\n", flag);
1126 return -1;
1127 }
1128 /*
1129 * We expect this value to be non-zero when generic Block Layer
1130 * Discard supported is detected iblock_create_virtdevice().
1131 */
1132 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1133 printk(KERN_ERR "Generic Block Discard not supported\n");
1134 return -ENOSYS;
1135 }
1136
1137 DEV_ATTRIB(dev)->emulate_tpu = flag;
1138 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1139 dev, flag);
1140 return 0;
1141}
1142
1143int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1144{
1145 if ((flag != 0) && (flag != 1)) {
1146 printk(KERN_ERR "Illegal value %d\n", flag);
1147 return -1;
1148 }
1149 /*
1150 * We expect this value to be non-zero when generic Block Layer
1151 * Discard supported is detected iblock_create_virtdevice().
1152 */
1153 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1154 printk(KERN_ERR "Generic Block Discard not supported\n");
1155 return -ENOSYS;
1156 }
1157
1158 DEV_ATTRIB(dev)->emulate_tpws = flag;
1159 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1160 dev, flag);
1161 return 0;
1162}
1163
1164int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1165{
1166 if ((flag != 0) && (flag != 1)) {
1167 printk(KERN_ERR "Illegal value %d\n", flag);
1168 return -1;
1169 }
1170 DEV_ATTRIB(dev)->enforce_pr_isids = flag;
1171 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1172 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
1173 return 0;
1174}
1175
1176/*
1177 * Note, this can only be called on unexported SE Device Object.
1178 */
1179int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1180{
1181 u32 orig_queue_depth = dev->queue_depth;
1182
1183 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1184 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
1185 " dev_export_obj: %d count exists\n", dev,
1186 atomic_read(&dev->dev_export_obj.obj_access_count));
1187 return -1;
1188 }
1189 if (!(queue_depth)) {
1190 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
1191 "_depth\n", dev);
1192 return -1;
1193 }
1194
1195 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1196 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1197 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
1198 " exceeds TCM/SE_Device TCQ: %u\n",
1199 dev, queue_depth,
1200 DEV_ATTRIB(dev)->hw_queue_depth);
1201 return -1;
1202 }
1203 } else {
1204 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
1205 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1206 printk(KERN_ERR "dev[%p]: Passed queue_depth:"
1207 " %u exceeds TCM/SE_Device MAX"
1208 " TCQ: %u\n", dev, queue_depth,
1209 DEV_ATTRIB(dev)->hw_queue_depth);
1210 return -1;
1211 }
1212 }
1213 }
1214
1215 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
1216 if (queue_depth > orig_queue_depth)
1217 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1218 else if (queue_depth < orig_queue_depth)
1219 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1220
1221 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
1222 dev, queue_depth);
1223 return 0;
1224}
1225
1226int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1227{
1228 int force = 0; /* Force setting for VDEVS */
1229
1230 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1231 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1232 " max_sectors while dev_export_obj: %d count exists\n",
1233 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1234 return -1;
1235 }
1236 if (!(max_sectors)) {
1237 printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
1238 " max_sectors\n", dev);
1239 return -1;
1240 }
1241 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1242 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
1243 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1244 DA_STATUS_MAX_SECTORS_MIN);
1245 return -1;
1246 }
1247 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1248 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
1249 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1250 " greater than TCM/SE_Device max_sectors:"
1251 " %u\n", dev, max_sectors,
1252 DEV_ATTRIB(dev)->hw_max_sectors);
1253 return -1;
1254 }
1255 } else {
1256 if (!(force) && (max_sectors >
1257 DEV_ATTRIB(dev)->hw_max_sectors)) {
1258 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1259 " greater than TCM/SE_Device max_sectors"
1260 ": %u, use force=1 to override.\n", dev,
1261 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
1262 return -1;
1263 }
1264 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1265 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1266 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1267 " %u\n", dev, max_sectors,
1268 DA_STATUS_MAX_SECTORS_MAX);
1269 return -1;
1270 }
1271 }
1272
1273 DEV_ATTRIB(dev)->max_sectors = max_sectors;
1274 printk("dev[%p]: SE Device max_sectors changed to %u\n",
1275 dev, max_sectors);
1276 return 0;
1277}
1278
1279int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1280{
1281 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1282 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1283 " optimal_sectors while dev_export_obj: %d count exists\n",
1284 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1285 return -EINVAL;
1286 }
1287 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1288 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
1289 " changed for TCM/pSCSI\n", dev);
1290 return -EINVAL;
1291 }
1292 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
1293 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
1294 " greater than max_sectors: %u\n", dev,
1295 optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
1296 return -EINVAL;
1297 }
1298
1299 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
1300 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
1301 dev, optimal_sectors);
1302 return 0;
1303}
1304
1305int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1306{
1307 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1308 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
1309 " while dev_export_obj: %d count exists\n", dev,
1310 atomic_read(&dev->dev_export_obj.obj_access_count));
1311 return -1;
1312 }
1313
1314 if ((block_size != 512) &&
1315 (block_size != 1024) &&
1316 (block_size != 2048) &&
1317 (block_size != 4096)) {
1318 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
1319 " for SE device, must be 512, 1024, 2048 or 4096\n",
1320 dev, block_size);
1321 return -1;
1322 }
1323
1324 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1325 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
1326 " Physical Device, use for Linux/SCSI to change"
1327 " block_size for underlying hardware\n", dev);
1328 return -1;
1329 }
1330
1331 DEV_ATTRIB(dev)->block_size = block_size;
1332 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
1333 dev, block_size);
1334 return 0;
1335}
1336
1337struct se_lun *core_dev_add_lun(
1338 struct se_portal_group *tpg,
1339 struct se_hba *hba,
1340 struct se_device *dev,
1341 u32 lun)
1342{
1343 struct se_lun *lun_p;
1344 u32 lun_access = 0;
1345
1346 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1347 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
1348 atomic_read(&dev->dev_access_obj.obj_access_count));
1349 return NULL;
1350 }
1351
1352 lun_p = core_tpg_pre_addlun(tpg, lun);
1353 if ((IS_ERR(lun_p)) || !(lun_p))
1354 return NULL;
1355
1356 if (dev->dev_flags & DF_READ_ONLY)
1357 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1358 else
1359 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1360
1361 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1362 return NULL;
1363
1364 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1365 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1366 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
1367 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
1368 /*
1369 * Update LUN maps for dynamically added initiators when
1370 * generate_node_acl is enabled.
1371 */
1372 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
1373 struct se_node_acl *acl;
1374 spin_lock_bh(&tpg->acl_node_lock);
1375 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1376 if (acl->dynamic_node_acl) {
1377 spin_unlock_bh(&tpg->acl_node_lock);
1378 core_tpg_add_node_to_devs(acl, tpg);
1379 spin_lock_bh(&tpg->acl_node_lock);
1380 }
1381 }
1382 spin_unlock_bh(&tpg->acl_node_lock);
1383 }
1384
1385 return lun_p;
1386}
1387
1388/* core_dev_del_lun():
1389 *
1390 *
1391 */
1392int core_dev_del_lun(
1393 struct se_portal_group *tpg,
1394 u32 unpacked_lun)
1395{
1396 struct se_lun *lun;
1397 int ret = 0;
1398
1399 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1400 if (!(lun))
1401 return ret;
1402
1403 core_tpg_post_dellun(tpg, lun);
1404
1405 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1406 " device object\n", TPG_TFO(tpg)->get_fabric_name(),
1407 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
1408 TPG_TFO(tpg)->get_fabric_name());
1409
1410 return 0;
1411}
1412
1413struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1414{
1415 struct se_lun *lun;
1416
1417 spin_lock(&tpg->tpg_lun_lock);
1418 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1419 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1420 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1421 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1422 TRANSPORT_MAX_LUNS_PER_TPG-1,
1423 TPG_TFO(tpg)->tpg_get_tag(tpg));
1424 spin_unlock(&tpg->tpg_lun_lock);
1425 return NULL;
1426 }
1427 lun = &tpg->tpg_lun_list[unpacked_lun];
1428
1429 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1430 printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
1431 " Target Portal Group: %hu, ignoring request.\n",
1432 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1433 TPG_TFO(tpg)->tpg_get_tag(tpg));
1434 spin_unlock(&tpg->tpg_lun_lock);
1435 return NULL;
1436 }
1437 spin_unlock(&tpg->tpg_lun_lock);
1438
1439 return lun;
1440}
1441
1442/* core_dev_get_lun():
1443 *
1444 *
1445 */
1446static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1447{
1448 struct se_lun *lun;
1449
1450 spin_lock(&tpg->tpg_lun_lock);
1451 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1452 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1453 "_TPG-1: %u for Target Portal Group: %hu\n",
1454 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1455 TRANSPORT_MAX_LUNS_PER_TPG-1,
1456 TPG_TFO(tpg)->tpg_get_tag(tpg));
1457 spin_unlock(&tpg->tpg_lun_lock);
1458 return NULL;
1459 }
1460 lun = &tpg->tpg_lun_list[unpacked_lun];
1461
1462 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1463 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1464 " Target Portal Group: %hu, ignoring request.\n",
1465 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1466 TPG_TFO(tpg)->tpg_get_tag(tpg));
1467 spin_unlock(&tpg->tpg_lun_lock);
1468 return NULL;
1469 }
1470 spin_unlock(&tpg->tpg_lun_lock);
1471
1472 return lun;
1473}
1474
1475struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1476 struct se_portal_group *tpg,
1477 u32 mapped_lun,
1478 char *initiatorname,
1479 int *ret)
1480{
1481 struct se_lun_acl *lacl;
1482 struct se_node_acl *nacl;
1483
1484 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
1485 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
1486 TPG_TFO(tpg)->get_fabric_name());
1487 *ret = -EOVERFLOW;
1488 return NULL;
1489 }
1490 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1491 if (!(nacl)) {
1492 *ret = -EINVAL;
1493 return NULL;
1494 }
1495 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1496 if (!(lacl)) {
1497 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
1498 *ret = -ENOMEM;
1499 return NULL;
1500 }
1501
1502 INIT_LIST_HEAD(&lacl->lacl_list);
1503 lacl->mapped_lun = mapped_lun;
1504 lacl->se_lun_nacl = nacl;
1505 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1506
1507 return lacl;
1508}
1509
1510int core_dev_add_initiator_node_lun_acl(
1511 struct se_portal_group *tpg,
1512 struct se_lun_acl *lacl,
1513 u32 unpacked_lun,
1514 u32 lun_access)
1515{
1516 struct se_lun *lun;
1517 struct se_node_acl *nacl;
1518
1519 lun = core_dev_get_lun(tpg, unpacked_lun);
1520 if (!(lun)) {
1521 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1522 " Target Portal Group: %hu, ignoring request.\n",
1523 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1524 TPG_TFO(tpg)->tpg_get_tag(tpg));
1525 return -EINVAL;
1526 }
1527
1528 nacl = lacl->se_lun_nacl;
1529 if (!(nacl))
1530 return -EINVAL;
1531
1532 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1533 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1534 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1535
1536 lacl->se_lun = lun;
1537
1538 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1539 lun_access, nacl, tpg, 1) < 0)
1540 return -EINVAL;
1541
1542 spin_lock(&lun->lun_acl_lock);
1543 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1544 atomic_inc(&lun->lun_acl_count);
1545 smp_mb__after_atomic_inc();
1546 spin_unlock(&lun->lun_acl_lock);
1547
1548 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1549 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
1550 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1551 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1552 lacl->initiatorname);
1553 /*
1554 * Check to see if there are any existing persistent reservation APTPL
1555 * pre-registrations that need to be enabled for this LUN ACL..
1556 */
1557 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1558 return 0;
1559}
1560
1561/* core_dev_del_initiator_node_lun_acl():
1562 *
1563 *
1564 */
1565int core_dev_del_initiator_node_lun_acl(
1566 struct se_portal_group *tpg,
1567 struct se_lun *lun,
1568 struct se_lun_acl *lacl)
1569{
1570 struct se_node_acl *nacl;
1571
1572 nacl = lacl->se_lun_nacl;
1573 if (!(nacl))
1574 return -EINVAL;
1575
1576 spin_lock(&lun->lun_acl_lock);
1577 list_del(&lacl->lacl_list);
1578 atomic_dec(&lun->lun_acl_count);
1579 smp_mb__after_atomic_dec();
1580 spin_unlock(&lun->lun_acl_lock);
1581
1582 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1583 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1584
1585 lacl->se_lun = NULL;
1586
1587 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1588 " InitiatorNode: %s Mapped LUN: %u\n",
1589 TPG_TFO(tpg)->get_fabric_name(),
1590 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
1591 lacl->initiatorname, lacl->mapped_lun);
1592
1593 return 0;
1594}
1595
1596void core_dev_free_initiator_node_lun_acl(
1597 struct se_portal_group *tpg,
1598 struct se_lun_acl *lacl)
1599{
1600 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1601 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1602 TPG_TFO(tpg)->tpg_get_tag(tpg),
1603 TPG_TFO(tpg)->get_fabric_name(),
1604 lacl->initiatorname, lacl->mapped_lun);
1605
1606 kfree(lacl);
1607}
1608
1609int core_dev_setup_virtual_lun0(void)
1610{
1611 struct se_hba *hba;
1612 struct se_device *dev;
1613 struct se_subsystem_dev *se_dev = NULL;
1614 struct se_subsystem_api *t;
1615 char buf[16];
1616 int ret;
1617
1618 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
1619 if (IS_ERR(hba))
1620 return PTR_ERR(hba);
1621
1622 se_global->g_lun0_hba = hba;
1623 t = hba->transport;
1624
1625 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1626 if (!(se_dev)) {
1627 printk(KERN_ERR "Unable to allocate memory for"
1628 " struct se_subsystem_dev\n");
1629 ret = -ENOMEM;
1630 goto out;
1631 }
1632 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
1633 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1634 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1635 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
1636 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
1637 spin_lock_init(&se_dev->t10_reservation.registration_lock);
1638 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
1639 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1640 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1641 spin_lock_init(&se_dev->se_dev_lock);
1642 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1643 se_dev->t10_wwn.t10_sub_dev = se_dev;
1644 se_dev->t10_alua.t10_sub_dev = se_dev;
1645 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1646 se_dev->se_dev_hba = hba;
1647
1648 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1649 if (!(se_dev->se_dev_su_ptr)) {
1650 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
1651 " from allocate_virtdevice()\n");
1652 ret = -ENOMEM;
1653 goto out;
1654 }
1655 se_global->g_lun0_su_dev = se_dev;
1656
1657 memset(buf, 0, 16);
1658 sprintf(buf, "rd_pages=8");
1659 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1660
1661 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1662 if (!(dev) || IS_ERR(dev)) {
1663 ret = -ENOMEM;
1664 goto out;
1665 }
1666 se_dev->se_dev_ptr = dev;
1667 se_global->g_lun0_dev = dev;
1668
1669 return 0;
1670out:
1671 se_global->g_lun0_su_dev = NULL;
1672 kfree(se_dev);
1673 if (se_global->g_lun0_hba) {
1674 core_delete_hba(se_global->g_lun0_hba);
1675 se_global->g_lun0_hba = NULL;
1676 }
1677 return ret;
1678}
1679
1680
1681void core_dev_release_virtual_lun0(void)
1682{
1683 struct se_hba *hba = se_global->g_lun0_hba;
1684 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
1685
1686 if (!(hba))
1687 return;
1688
1689 if (se_global->g_lun0_dev)
1690 se_free_virtual_device(se_global->g_lun0_dev, hba);
1691
1692 kfree(su_dev);
1693 core_delete_hba(hba);
1694}
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