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target: Fix sense code for unsupported SERVICE ACTION IN
[deliverable/linux.git] / drivers / target / target_core_device.c
1 /*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
4 * This file contains the TCM 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/kthread.h>
37 #include <linux/in.h>
38 #include <linux/export.h>
39 #include <net/sock.h>
40 #include <net/tcp.h>
41 #include <scsi/scsi.h>
42 #include <scsi/scsi_device.h>
43
44 #include <target/target_core_base.h>
45 #include <target/target_core_backend.h>
46 #include <target/target_core_fabric.h>
47
48 #include "target_core_internal.h"
49 #include "target_core_alua.h"
50 #include "target_core_pr.h"
51 #include "target_core_ua.h"
52
53 static void se_dev_start(struct se_device *dev);
54 static void se_dev_stop(struct se_device *dev);
55
56 static struct se_hba *lun0_hba;
57 static struct se_subsystem_dev *lun0_su_dev;
58 /* not static, needed by tpg.c */
59 struct se_device *g_lun0_dev;
60
61 int transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
62 {
63 struct se_lun *se_lun = NULL;
64 struct se_session *se_sess = se_cmd->se_sess;
65 struct se_device *dev;
66 unsigned long flags;
67
68 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
69 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
70 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
71 return -ENODEV;
72 }
73
74 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
75 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
76 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
77 struct se_dev_entry *deve = se_cmd->se_deve;
78
79 deve->total_cmds++;
80 deve->total_bytes += se_cmd->data_length;
81
82 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
83 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
84 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
85 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
86 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
87 " Access for 0x%08x\n",
88 se_cmd->se_tfo->get_fabric_name(),
89 unpacked_lun);
90 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
91 return -EACCES;
92 }
93
94 if (se_cmd->data_direction == DMA_TO_DEVICE)
95 deve->write_bytes += se_cmd->data_length;
96 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
97 deve->read_bytes += se_cmd->data_length;
98
99 deve->deve_cmds++;
100
101 se_lun = deve->se_lun;
102 se_cmd->se_lun = deve->se_lun;
103 se_cmd->pr_res_key = deve->pr_res_key;
104 se_cmd->orig_fe_lun = unpacked_lun;
105 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
106 }
107 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
108
109 if (!se_lun) {
110 /*
111 * Use the se_portal_group->tpg_virt_lun0 to allow for
112 * REPORT_LUNS, et al to be returned when no active
113 * MappedLUN=0 exists for this Initiator Port.
114 */
115 if (unpacked_lun != 0) {
116 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
117 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
118 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
119 " Access for 0x%08x\n",
120 se_cmd->se_tfo->get_fabric_name(),
121 unpacked_lun);
122 return -ENODEV;
123 }
124 /*
125 * Force WRITE PROTECT for virtual LUN 0
126 */
127 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
128 (se_cmd->data_direction != DMA_NONE)) {
129 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
130 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
131 return -EACCES;
132 }
133
134 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
135 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
136 se_cmd->orig_fe_lun = 0;
137 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
138 }
139 /*
140 * Determine if the struct se_lun is online.
141 * FIXME: Check for LUN_RESET + UNIT Attention
142 */
143 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
144 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
145 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
146 return -ENODEV;
147 }
148
149 /* Directly associate cmd with se_dev */
150 se_cmd->se_dev = se_lun->lun_se_dev;
151
152 /* TODO: get rid of this and use atomics for stats */
153 dev = se_lun->lun_se_dev;
154 spin_lock_irqsave(&dev->stats_lock, flags);
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_irqrestore(&dev->stats_lock, flags);
161
162 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
163 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
164 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
165
166 return 0;
167 }
168 EXPORT_SYMBOL(transport_lookup_cmd_lun);
169
170 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
171 {
172 struct se_dev_entry *deve;
173 struct se_lun *se_lun = NULL;
174 struct se_session *se_sess = se_cmd->se_sess;
175 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
176 unsigned long flags;
177
178 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG) {
179 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
180 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
181 return -ENODEV;
182 }
183
184 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
185 se_cmd->se_deve = &se_sess->se_node_acl->device_list[unpacked_lun];
186 deve = se_cmd->se_deve;
187
188 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
189 se_tmr->tmr_lun = deve->se_lun;
190 se_cmd->se_lun = deve->se_lun;
191 se_lun = deve->se_lun;
192 se_cmd->pr_res_key = deve->pr_res_key;
193 se_cmd->orig_fe_lun = unpacked_lun;
194 }
195 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
196
197 if (!se_lun) {
198 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
199 " Access for 0x%08x\n",
200 se_cmd->se_tfo->get_fabric_name(),
201 unpacked_lun);
202 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
203 return -ENODEV;
204 }
205 /*
206 * Determine if the struct se_lun is online.
207 * FIXME: Check for LUN_RESET + UNIT Attention
208 */
209 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
210 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
211 return -ENODEV;
212 }
213
214 /* Directly associate cmd with se_dev */
215 se_cmd->se_dev = se_lun->lun_se_dev;
216 se_tmr->tmr_dev = se_lun->lun_se_dev;
217
218 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
219 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
220 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
221
222 return 0;
223 }
224 EXPORT_SYMBOL(transport_lookup_tmr_lun);
225
226 /*
227 * This function is called from core_scsi3_emulate_pro_register_and_move()
228 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
229 * when a matching rtpi is found.
230 */
231 struct se_dev_entry *core_get_se_deve_from_rtpi(
232 struct se_node_acl *nacl,
233 u16 rtpi)
234 {
235 struct se_dev_entry *deve;
236 struct se_lun *lun;
237 struct se_port *port;
238 struct se_portal_group *tpg = nacl->se_tpg;
239 u32 i;
240
241 spin_lock_irq(&nacl->device_list_lock);
242 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
243 deve = &nacl->device_list[i];
244
245 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
246 continue;
247
248 lun = deve->se_lun;
249 if (!lun) {
250 pr_err("%s device entries device pointer is"
251 " NULL, but Initiator has access.\n",
252 tpg->se_tpg_tfo->get_fabric_name());
253 continue;
254 }
255 port = lun->lun_sep;
256 if (!port) {
257 pr_err("%s device entries device pointer is"
258 " NULL, but Initiator has access.\n",
259 tpg->se_tpg_tfo->get_fabric_name());
260 continue;
261 }
262 if (port->sep_rtpi != rtpi)
263 continue;
264
265 atomic_inc(&deve->pr_ref_count);
266 smp_mb__after_atomic_inc();
267 spin_unlock_irq(&nacl->device_list_lock);
268
269 return deve;
270 }
271 spin_unlock_irq(&nacl->device_list_lock);
272
273 return NULL;
274 }
275
276 int core_free_device_list_for_node(
277 struct se_node_acl *nacl,
278 struct se_portal_group *tpg)
279 {
280 struct se_dev_entry *deve;
281 struct se_lun *lun;
282 u32 i;
283
284 if (!nacl->device_list)
285 return 0;
286
287 spin_lock_irq(&nacl->device_list_lock);
288 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
289 deve = &nacl->device_list[i];
290
291 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
292 continue;
293
294 if (!deve->se_lun) {
295 pr_err("%s device entries device pointer is"
296 " NULL, but Initiator has access.\n",
297 tpg->se_tpg_tfo->get_fabric_name());
298 continue;
299 }
300 lun = deve->se_lun;
301
302 spin_unlock_irq(&nacl->device_list_lock);
303 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
304 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
305 spin_lock_irq(&nacl->device_list_lock);
306 }
307 spin_unlock_irq(&nacl->device_list_lock);
308
309 kfree(nacl->device_list);
310 nacl->device_list = NULL;
311
312 return 0;
313 }
314
315 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
316 {
317 struct se_dev_entry *deve;
318 unsigned long flags;
319
320 spin_lock_irqsave(&se_nacl->device_list_lock, flags);
321 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
322 deve->deve_cmds--;
323 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
324 }
325
326 void core_update_device_list_access(
327 u32 mapped_lun,
328 u32 lun_access,
329 struct se_node_acl *nacl)
330 {
331 struct se_dev_entry *deve;
332
333 spin_lock_irq(&nacl->device_list_lock);
334 deve = &nacl->device_list[mapped_lun];
335 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
336 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
337 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
338 } else {
339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
341 }
342 spin_unlock_irq(&nacl->device_list_lock);
343 }
344
345 /* core_update_device_list_for_node():
346 *
347 *
348 */
349 int core_update_device_list_for_node(
350 struct se_lun *lun,
351 struct se_lun_acl *lun_acl,
352 u32 mapped_lun,
353 u32 lun_access,
354 struct se_node_acl *nacl,
355 struct se_portal_group *tpg,
356 int enable)
357 {
358 struct se_port *port = lun->lun_sep;
359 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
360 int trans = 0;
361 /*
362 * If the MappedLUN entry is being disabled, the entry in
363 * port->sep_alua_list must be removed now before clearing the
364 * struct se_dev_entry pointers below as logic in
365 * core_alua_do_transition_tg_pt() depends on these being present.
366 */
367 if (!enable) {
368 /*
369 * deve->se_lun_acl will be NULL for demo-mode created LUNs
370 * that have not been explicitly concerted to MappedLUNs ->
371 * struct se_lun_acl, but we remove deve->alua_port_list from
372 * port->sep_alua_list. This also means that active UAs and
373 * NodeACL context specific PR metadata for demo-mode
374 * MappedLUN *deve will be released below..
375 */
376 spin_lock_bh(&port->sep_alua_lock);
377 list_del(&deve->alua_port_list);
378 spin_unlock_bh(&port->sep_alua_lock);
379 }
380
381 spin_lock_irq(&nacl->device_list_lock);
382 if (enable) {
383 /*
384 * Check if the call is handling demo mode -> explict LUN ACL
385 * transition. This transition must be for the same struct se_lun
386 * + mapped_lun that was setup in demo mode..
387 */
388 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
389 if (deve->se_lun_acl != NULL) {
390 pr_err("struct se_dev_entry->se_lun_acl"
391 " already set for demo mode -> explict"
392 " LUN ACL transition\n");
393 spin_unlock_irq(&nacl->device_list_lock);
394 return -EINVAL;
395 }
396 if (deve->se_lun != lun) {
397 pr_err("struct se_dev_entry->se_lun does"
398 " match passed struct se_lun for demo mode"
399 " -> explict LUN ACL transition\n");
400 spin_unlock_irq(&nacl->device_list_lock);
401 return -EINVAL;
402 }
403 deve->se_lun_acl = lun_acl;
404 trans = 1;
405 } else {
406 deve->se_lun = lun;
407 deve->se_lun_acl = lun_acl;
408 deve->mapped_lun = mapped_lun;
409 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
410 }
411
412 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
413 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
414 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
415 } else {
416 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
417 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
418 }
419
420 if (trans) {
421 spin_unlock_irq(&nacl->device_list_lock);
422 return 0;
423 }
424 deve->creation_time = get_jiffies_64();
425 deve->attach_count++;
426 spin_unlock_irq(&nacl->device_list_lock);
427
428 spin_lock_bh(&port->sep_alua_lock);
429 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
430 spin_unlock_bh(&port->sep_alua_lock);
431
432 return 0;
433 }
434 /*
435 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
436 * PR operation to complete.
437 */
438 spin_unlock_irq(&nacl->device_list_lock);
439 while (atomic_read(&deve->pr_ref_count) != 0)
440 cpu_relax();
441 spin_lock_irq(&nacl->device_list_lock);
442 /*
443 * Disable struct se_dev_entry LUN ACL mapping
444 */
445 core_scsi3_ua_release_all(deve);
446 deve->se_lun = NULL;
447 deve->se_lun_acl = NULL;
448 deve->lun_flags = 0;
449 deve->creation_time = 0;
450 deve->attach_count--;
451 spin_unlock_irq(&nacl->device_list_lock);
452
453 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
454 return 0;
455 }
456
457 /* core_clear_lun_from_tpg():
458 *
459 *
460 */
461 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
462 {
463 struct se_node_acl *nacl;
464 struct se_dev_entry *deve;
465 u32 i;
466
467 spin_lock_irq(&tpg->acl_node_lock);
468 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
469 spin_unlock_irq(&tpg->acl_node_lock);
470
471 spin_lock_irq(&nacl->device_list_lock);
472 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
473 deve = &nacl->device_list[i];
474 if (lun != deve->se_lun)
475 continue;
476 spin_unlock_irq(&nacl->device_list_lock);
477
478 core_update_device_list_for_node(lun, NULL,
479 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
480 nacl, tpg, 0);
481
482 spin_lock_irq(&nacl->device_list_lock);
483 }
484 spin_unlock_irq(&nacl->device_list_lock);
485
486 spin_lock_irq(&tpg->acl_node_lock);
487 }
488 spin_unlock_irq(&tpg->acl_node_lock);
489 }
490
491 static struct se_port *core_alloc_port(struct se_device *dev)
492 {
493 struct se_port *port, *port_tmp;
494
495 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
496 if (!port) {
497 pr_err("Unable to allocate struct se_port\n");
498 return ERR_PTR(-ENOMEM);
499 }
500 INIT_LIST_HEAD(&port->sep_alua_list);
501 INIT_LIST_HEAD(&port->sep_list);
502 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
503 spin_lock_init(&port->sep_alua_lock);
504 mutex_init(&port->sep_tg_pt_md_mutex);
505
506 spin_lock(&dev->se_port_lock);
507 if (dev->dev_port_count == 0x0000ffff) {
508 pr_warn("Reached dev->dev_port_count =="
509 " 0x0000ffff\n");
510 spin_unlock(&dev->se_port_lock);
511 return ERR_PTR(-ENOSPC);
512 }
513 again:
514 /*
515 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
516 * Here is the table from spc4r17 section 7.7.3.8.
517 *
518 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
519 *
520 * Code Description
521 * 0h Reserved
522 * 1h Relative port 1, historically known as port A
523 * 2h Relative port 2, historically known as port B
524 * 3h to FFFFh Relative port 3 through 65 535
525 */
526 port->sep_rtpi = dev->dev_rpti_counter++;
527 if (!port->sep_rtpi)
528 goto again;
529
530 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
531 /*
532 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
533 * for 16-bit wrap..
534 */
535 if (port->sep_rtpi == port_tmp->sep_rtpi)
536 goto again;
537 }
538 spin_unlock(&dev->se_port_lock);
539
540 return port;
541 }
542
543 static void core_export_port(
544 struct se_device *dev,
545 struct se_portal_group *tpg,
546 struct se_port *port,
547 struct se_lun *lun)
548 {
549 struct se_subsystem_dev *su_dev = dev->se_sub_dev;
550 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
551
552 spin_lock(&dev->se_port_lock);
553 spin_lock(&lun->lun_sep_lock);
554 port->sep_tpg = tpg;
555 port->sep_lun = lun;
556 lun->lun_sep = port;
557 spin_unlock(&lun->lun_sep_lock);
558
559 list_add_tail(&port->sep_list, &dev->dev_sep_list);
560 spin_unlock(&dev->se_port_lock);
561
562 if (su_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) {
563 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
564 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
565 pr_err("Unable to allocate t10_alua_tg_pt"
566 "_gp_member_t\n");
567 return;
568 }
569 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
570 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
571 su_dev->t10_alua.default_tg_pt_gp);
572 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
573 pr_debug("%s/%s: Adding to default ALUA Target Port"
574 " Group: alua/default_tg_pt_gp\n",
575 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
576 }
577
578 dev->dev_port_count++;
579 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
580 }
581
582 /*
583 * Called with struct se_device->se_port_lock spinlock held.
584 */
585 static void core_release_port(struct se_device *dev, struct se_port *port)
586 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
587 {
588 /*
589 * Wait for any port reference for PR ALL_TG_PT=1 operation
590 * to complete in __core_scsi3_alloc_registration()
591 */
592 spin_unlock(&dev->se_port_lock);
593 if (atomic_read(&port->sep_tg_pt_ref_cnt))
594 cpu_relax();
595 spin_lock(&dev->se_port_lock);
596
597 core_alua_free_tg_pt_gp_mem(port);
598
599 list_del(&port->sep_list);
600 dev->dev_port_count--;
601 kfree(port);
602 }
603
604 int core_dev_export(
605 struct se_device *dev,
606 struct se_portal_group *tpg,
607 struct se_lun *lun)
608 {
609 struct se_port *port;
610
611 port = core_alloc_port(dev);
612 if (IS_ERR(port))
613 return PTR_ERR(port);
614
615 lun->lun_se_dev = dev;
616 se_dev_start(dev);
617
618 atomic_inc(&dev->dev_export_obj.obj_access_count);
619 core_export_port(dev, tpg, port, lun);
620 return 0;
621 }
622
623 void core_dev_unexport(
624 struct se_device *dev,
625 struct se_portal_group *tpg,
626 struct se_lun *lun)
627 {
628 struct se_port *port = lun->lun_sep;
629
630 spin_lock(&lun->lun_sep_lock);
631 if (lun->lun_se_dev == NULL) {
632 spin_unlock(&lun->lun_sep_lock);
633 return;
634 }
635 spin_unlock(&lun->lun_sep_lock);
636
637 spin_lock(&dev->se_port_lock);
638 atomic_dec(&dev->dev_export_obj.obj_access_count);
639 core_release_port(dev, port);
640 spin_unlock(&dev->se_port_lock);
641
642 se_dev_stop(dev);
643 lun->lun_se_dev = NULL;
644 }
645
646 int target_report_luns(struct se_task *se_task)
647 {
648 struct se_cmd *se_cmd = se_task->task_se_cmd;
649 struct se_dev_entry *deve;
650 struct se_lun *se_lun;
651 struct se_session *se_sess = se_cmd->se_sess;
652 unsigned char *buf;
653 u32 lun_count = 0, offset = 8, i;
654
655 buf = transport_kmap_data_sg(se_cmd);
656 if (!buf)
657 return -ENOMEM;
658
659 /*
660 * If no struct se_session pointer is present, this struct se_cmd is
661 * coming via a target_core_mod PASSTHROUGH op, and not through
662 * a $FABRIC_MOD. In that case, report LUN=0 only.
663 */
664 if (!se_sess) {
665 int_to_scsilun(0, (struct scsi_lun *)&buf[offset]);
666 lun_count = 1;
667 goto done;
668 }
669
670 spin_lock_irq(&se_sess->se_node_acl->device_list_lock);
671 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
672 deve = &se_sess->se_node_acl->device_list[i];
673 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
674 continue;
675 se_lun = deve->se_lun;
676 /*
677 * We determine the correct LUN LIST LENGTH even once we
678 * have reached the initial allocation length.
679 * See SPC2-R20 7.19.
680 */
681 lun_count++;
682 if ((offset + 8) > se_cmd->data_length)
683 continue;
684
685 int_to_scsilun(deve->mapped_lun, (struct scsi_lun *)&buf[offset]);
686 offset += 8;
687 }
688 spin_unlock_irq(&se_sess->se_node_acl->device_list_lock);
689
690 /*
691 * See SPC3 r07, page 159.
692 */
693 done:
694 lun_count *= 8;
695 buf[0] = ((lun_count >> 24) & 0xff);
696 buf[1] = ((lun_count >> 16) & 0xff);
697 buf[2] = ((lun_count >> 8) & 0xff);
698 buf[3] = (lun_count & 0xff);
699 transport_kunmap_data_sg(se_cmd);
700
701 se_task->task_scsi_status = GOOD;
702 transport_complete_task(se_task, 1);
703 return 0;
704 }
705
706 /* se_release_device_for_hba():
707 *
708 *
709 */
710 void se_release_device_for_hba(struct se_device *dev)
711 {
712 struct se_hba *hba = dev->se_hba;
713
714 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
715 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
716 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
717 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
718 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
719 se_dev_stop(dev);
720
721 if (dev->dev_ptr) {
722 kthread_stop(dev->process_thread);
723 if (dev->transport->free_device)
724 dev->transport->free_device(dev->dev_ptr);
725 }
726
727 spin_lock(&hba->device_lock);
728 list_del(&dev->dev_list);
729 hba->dev_count--;
730 spin_unlock(&hba->device_lock);
731
732 core_scsi3_free_all_registrations(dev);
733 se_release_vpd_for_dev(dev);
734
735 kfree(dev);
736 }
737
738 void se_release_vpd_for_dev(struct se_device *dev)
739 {
740 struct t10_vpd *vpd, *vpd_tmp;
741
742 spin_lock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
743 list_for_each_entry_safe(vpd, vpd_tmp,
744 &dev->se_sub_dev->t10_wwn.t10_vpd_list, vpd_list) {
745 list_del(&vpd->vpd_list);
746 kfree(vpd);
747 }
748 spin_unlock(&dev->se_sub_dev->t10_wwn.t10_vpd_lock);
749 }
750
751 /* se_free_virtual_device():
752 *
753 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
754 */
755 int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
756 {
757 if (!list_empty(&dev->dev_sep_list))
758 dump_stack();
759
760 core_alua_free_lu_gp_mem(dev);
761 se_release_device_for_hba(dev);
762
763 return 0;
764 }
765
766 static void se_dev_start(struct se_device *dev)
767 {
768 struct se_hba *hba = dev->se_hba;
769
770 spin_lock(&hba->device_lock);
771 atomic_inc(&dev->dev_obj.obj_access_count);
772 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
773 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
774 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
775 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
776 } else if (dev->dev_status &
777 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
778 dev->dev_status &=
779 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
780 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
781 }
782 }
783 spin_unlock(&hba->device_lock);
784 }
785
786 static void se_dev_stop(struct se_device *dev)
787 {
788 struct se_hba *hba = dev->se_hba;
789
790 spin_lock(&hba->device_lock);
791 atomic_dec(&dev->dev_obj.obj_access_count);
792 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
793 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
794 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
795 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
796 } else if (dev->dev_status &
797 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
798 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
799 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
800 }
801 }
802 spin_unlock(&hba->device_lock);
803 }
804
805 int se_dev_check_online(struct se_device *dev)
806 {
807 unsigned long flags;
808 int ret;
809
810 spin_lock_irqsave(&dev->dev_status_lock, flags);
811 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
812 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
813 spin_unlock_irqrestore(&dev->dev_status_lock, flags);
814
815 return ret;
816 }
817
818 int se_dev_check_shutdown(struct se_device *dev)
819 {
820 int ret;
821
822 spin_lock_irq(&dev->dev_status_lock);
823 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
824 spin_unlock_irq(&dev->dev_status_lock);
825
826 return ret;
827 }
828
829 u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
830 {
831 u32 tmp, aligned_max_sectors;
832 /*
833 * Limit max_sectors to a PAGE_SIZE aligned value for modern
834 * transport_allocate_data_tasks() operation.
835 */
836 tmp = rounddown((max_sectors * block_size), PAGE_SIZE);
837 aligned_max_sectors = (tmp / block_size);
838 if (max_sectors != aligned_max_sectors) {
839 printk(KERN_INFO "Rounding down aligned max_sectors from %u"
840 " to %u\n", max_sectors, aligned_max_sectors);
841 return aligned_max_sectors;
842 }
843
844 return max_sectors;
845 }
846
847 void se_dev_set_default_attribs(
848 struct se_device *dev,
849 struct se_dev_limits *dev_limits)
850 {
851 struct queue_limits *limits = &dev_limits->limits;
852
853 dev->se_sub_dev->se_dev_attrib.emulate_dpo = DA_EMULATE_DPO;
854 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
855 dev->se_sub_dev->se_dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
856 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
857 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
858 dev->se_sub_dev->se_dev_attrib.emulate_tas = DA_EMULATE_TAS;
859 dev->se_sub_dev->se_dev_attrib.emulate_tpu = DA_EMULATE_TPU;
860 dev->se_sub_dev->se_dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
861 dev->se_sub_dev->se_dev_attrib.emulate_reservations = DA_EMULATE_RESERVATIONS;
862 dev->se_sub_dev->se_dev_attrib.emulate_alua = DA_EMULATE_ALUA;
863 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
864 dev->se_sub_dev->se_dev_attrib.is_nonrot = DA_IS_NONROT;
865 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
866 /*
867 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
868 * iblock_create_virtdevice() from struct queue_limits values
869 * if blk_queue_discard()==1
870 */
871 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
872 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
873 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
874 dev->se_sub_dev->se_dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
875 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment =
876 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
877 /*
878 * block_size is based on subsystem plugin dependent requirements.
879 */
880 dev->se_sub_dev->se_dev_attrib.hw_block_size = limits->logical_block_size;
881 dev->se_sub_dev->se_dev_attrib.block_size = limits->logical_block_size;
882 /*
883 * max_sectors is based on subsystem plugin dependent requirements.
884 */
885 dev->se_sub_dev->se_dev_attrib.hw_max_sectors = limits->max_hw_sectors;
886 /*
887 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
888 */
889 limits->max_sectors = se_dev_align_max_sectors(limits->max_sectors,
890 limits->logical_block_size);
891 dev->se_sub_dev->se_dev_attrib.max_sectors = limits->max_sectors;
892 /*
893 * Set fabric_max_sectors, which is reported in block limits
894 * VPD page (B0h).
895 */
896 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
897 /*
898 * Set optimal_sectors from fabric_max_sectors, which can be
899 * lowered via configfs.
900 */
901 dev->se_sub_dev->se_dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
902 /*
903 * queue_depth is based on subsystem plugin dependent requirements.
904 */
905 dev->se_sub_dev->se_dev_attrib.hw_queue_depth = dev_limits->hw_queue_depth;
906 dev->se_sub_dev->se_dev_attrib.queue_depth = dev_limits->queue_depth;
907 }
908
909 int se_dev_set_max_unmap_lba_count(
910 struct se_device *dev,
911 u32 max_unmap_lba_count)
912 {
913 dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
914 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
915 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count);
916 return 0;
917 }
918
919 int se_dev_set_max_unmap_block_desc_count(
920 struct se_device *dev,
921 u32 max_unmap_block_desc_count)
922 {
923 dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count =
924 max_unmap_block_desc_count;
925 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
926 dev, dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count);
927 return 0;
928 }
929
930 int se_dev_set_unmap_granularity(
931 struct se_device *dev,
932 u32 unmap_granularity)
933 {
934 dev->se_sub_dev->se_dev_attrib.unmap_granularity = unmap_granularity;
935 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
936 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity);
937 return 0;
938 }
939
940 int se_dev_set_unmap_granularity_alignment(
941 struct se_device *dev,
942 u32 unmap_granularity_alignment)
943 {
944 dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
945 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
946 dev, dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment);
947 return 0;
948 }
949
950 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
951 {
952 if (flag != 0 && flag != 1) {
953 pr_err("Illegal value %d\n", flag);
954 return -EINVAL;
955 }
956
957 if (flag) {
958 pr_err("dpo_emulated not supported\n");
959 return -EINVAL;
960 }
961
962 return 0;
963 }
964
965 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
966 {
967 if (flag != 0 && flag != 1) {
968 pr_err("Illegal value %d\n", flag);
969 return -EINVAL;
970 }
971
972 if (flag && dev->transport->fua_write_emulated == 0) {
973 pr_err("fua_write_emulated not supported\n");
974 return -EINVAL;
975 }
976 dev->se_sub_dev->se_dev_attrib.emulate_fua_write = flag;
977 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
978 dev, dev->se_sub_dev->se_dev_attrib.emulate_fua_write);
979 return 0;
980 }
981
982 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
983 {
984 if (flag != 0 && flag != 1) {
985 pr_err("Illegal value %d\n", flag);
986 return -EINVAL;
987 }
988
989 if (flag) {
990 pr_err("ua read emulated not supported\n");
991 return -EINVAL;
992 }
993
994 return 0;
995 }
996
997 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
998 {
999 if (flag != 0 && flag != 1) {
1000 pr_err("Illegal value %d\n", flag);
1001 return -EINVAL;
1002 }
1003 if (flag && dev->transport->write_cache_emulated == 0) {
1004 pr_err("write_cache_emulated not supported\n");
1005 return -EINVAL;
1006 }
1007 dev->se_sub_dev->se_dev_attrib.emulate_write_cache = flag;
1008 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1009 dev, dev->se_sub_dev->se_dev_attrib.emulate_write_cache);
1010 return 0;
1011 }
1012
1013 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1014 {
1015 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1016 pr_err("Illegal value %d\n", flag);
1017 return -EINVAL;
1018 }
1019
1020 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1021 pr_err("dev[%p]: Unable to change SE Device"
1022 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1023 " exists\n", dev,
1024 atomic_read(&dev->dev_export_obj.obj_access_count));
1025 return -EINVAL;
1026 }
1027 dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl = flag;
1028 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1029 dev, dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl);
1030
1031 return 0;
1032 }
1033
1034 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1035 {
1036 if ((flag != 0) && (flag != 1)) {
1037 pr_err("Illegal value %d\n", flag);
1038 return -EINVAL;
1039 }
1040
1041 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1042 pr_err("dev[%p]: Unable to change SE Device TAS while"
1043 " dev_export_obj: %d count exists\n", dev,
1044 atomic_read(&dev->dev_export_obj.obj_access_count));
1045 return -EINVAL;
1046 }
1047 dev->se_sub_dev->se_dev_attrib.emulate_tas = flag;
1048 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1049 dev, (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
1050
1051 return 0;
1052 }
1053
1054 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1055 {
1056 if ((flag != 0) && (flag != 1)) {
1057 pr_err("Illegal value %d\n", flag);
1058 return -EINVAL;
1059 }
1060 /*
1061 * We expect this value to be non-zero when generic Block Layer
1062 * Discard supported is detected iblock_create_virtdevice().
1063 */
1064 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1065 pr_err("Generic Block Discard not supported\n");
1066 return -ENOSYS;
1067 }
1068
1069 dev->se_sub_dev->se_dev_attrib.emulate_tpu = flag;
1070 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1071 dev, flag);
1072 return 0;
1073 }
1074
1075 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1076 {
1077 if ((flag != 0) && (flag != 1)) {
1078 pr_err("Illegal value %d\n", flag);
1079 return -EINVAL;
1080 }
1081 /*
1082 * We expect this value to be non-zero when generic Block Layer
1083 * Discard supported is detected iblock_create_virtdevice().
1084 */
1085 if (flag && !dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count) {
1086 pr_err("Generic Block Discard not supported\n");
1087 return -ENOSYS;
1088 }
1089
1090 dev->se_sub_dev->se_dev_attrib.emulate_tpws = flag;
1091 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1092 dev, flag);
1093 return 0;
1094 }
1095
1096 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1097 {
1098 if ((flag != 0) && (flag != 1)) {
1099 pr_err("Illegal value %d\n", flag);
1100 return -EINVAL;
1101 }
1102 dev->se_sub_dev->se_dev_attrib.enforce_pr_isids = flag;
1103 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1104 (dev->se_sub_dev->se_dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
1105 return 0;
1106 }
1107
1108 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
1109 {
1110 if ((flag != 0) && (flag != 1)) {
1111 printk(KERN_ERR "Illegal value %d\n", flag);
1112 return -EINVAL;
1113 }
1114 dev->se_sub_dev->se_dev_attrib.is_nonrot = flag;
1115 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
1116 dev, flag);
1117 return 0;
1118 }
1119
1120 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
1121 {
1122 if (flag != 0) {
1123 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
1124 " reordering not implemented\n", dev);
1125 return -ENOSYS;
1126 }
1127 dev->se_sub_dev->se_dev_attrib.emulate_rest_reord = flag;
1128 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
1129 return 0;
1130 }
1131
1132 /*
1133 * Note, this can only be called on unexported SE Device Object.
1134 */
1135 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1136 {
1137 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1138 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1139 " dev_export_obj: %d count exists\n", dev,
1140 atomic_read(&dev->dev_export_obj.obj_access_count));
1141 return -EINVAL;
1142 }
1143 if (!queue_depth) {
1144 pr_err("dev[%p]: Illegal ZERO value for queue"
1145 "_depth\n", dev);
1146 return -EINVAL;
1147 }
1148
1149 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1150 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1151 pr_err("dev[%p]: Passed queue_depth: %u"
1152 " exceeds TCM/SE_Device TCQ: %u\n",
1153 dev, queue_depth,
1154 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1155 return -EINVAL;
1156 }
1157 } else {
1158 if (queue_depth > dev->se_sub_dev->se_dev_attrib.queue_depth) {
1159 if (queue_depth > dev->se_sub_dev->se_dev_attrib.hw_queue_depth) {
1160 pr_err("dev[%p]: Passed queue_depth:"
1161 " %u exceeds TCM/SE_Device MAX"
1162 " TCQ: %u\n", dev, queue_depth,
1163 dev->se_sub_dev->se_dev_attrib.hw_queue_depth);
1164 return -EINVAL;
1165 }
1166 }
1167 }
1168
1169 dev->se_sub_dev->se_dev_attrib.queue_depth = dev->queue_depth = queue_depth;
1170 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
1171 dev, queue_depth);
1172 return 0;
1173 }
1174
1175 int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1176 {
1177 int force = 0; /* Force setting for VDEVS */
1178
1179 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1180 pr_err("dev[%p]: Unable to change SE Device"
1181 " max_sectors while dev_export_obj: %d count exists\n",
1182 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1183 return -EINVAL;
1184 }
1185 if (!max_sectors) {
1186 pr_err("dev[%p]: Illegal ZERO value for"
1187 " max_sectors\n", dev);
1188 return -EINVAL;
1189 }
1190 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1191 pr_err("dev[%p]: Passed max_sectors: %u less than"
1192 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1193 DA_STATUS_MAX_SECTORS_MIN);
1194 return -EINVAL;
1195 }
1196 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1197 if (max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1198 pr_err("dev[%p]: Passed max_sectors: %u"
1199 " greater than TCM/SE_Device max_sectors:"
1200 " %u\n", dev, max_sectors,
1201 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1202 return -EINVAL;
1203 }
1204 } else {
1205 if (!force && (max_sectors >
1206 dev->se_sub_dev->se_dev_attrib.hw_max_sectors)) {
1207 pr_err("dev[%p]: Passed max_sectors: %u"
1208 " greater than TCM/SE_Device max_sectors"
1209 ": %u, use force=1 to override.\n", dev,
1210 max_sectors, dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1211 return -EINVAL;
1212 }
1213 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1214 pr_err("dev[%p]: Passed max_sectors: %u"
1215 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1216 " %u\n", dev, max_sectors,
1217 DA_STATUS_MAX_SECTORS_MAX);
1218 return -EINVAL;
1219 }
1220 }
1221 /*
1222 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1223 */
1224 max_sectors = se_dev_align_max_sectors(max_sectors,
1225 dev->se_sub_dev->se_dev_attrib.block_size);
1226
1227 dev->se_sub_dev->se_dev_attrib.max_sectors = max_sectors;
1228 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1229 dev, max_sectors);
1230 return 0;
1231 }
1232
1233 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
1234 {
1235 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1236 pr_err("dev[%p]: Unable to change SE Device"
1237 " fabric_max_sectors while dev_export_obj: %d count exists\n",
1238 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1239 return -EINVAL;
1240 }
1241 if (!fabric_max_sectors) {
1242 pr_err("dev[%p]: Illegal ZERO value for"
1243 " fabric_max_sectors\n", dev);
1244 return -EINVAL;
1245 }
1246 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1247 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
1248 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
1249 DA_STATUS_MAX_SECTORS_MIN);
1250 return -EINVAL;
1251 }
1252 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1253 if (fabric_max_sectors > dev->se_sub_dev->se_dev_attrib.hw_max_sectors) {
1254 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1255 " greater than TCM/SE_Device max_sectors:"
1256 " %u\n", dev, fabric_max_sectors,
1257 dev->se_sub_dev->se_dev_attrib.hw_max_sectors);
1258 return -EINVAL;
1259 }
1260 } else {
1261 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1262 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
1263 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1264 " %u\n", dev, fabric_max_sectors,
1265 DA_STATUS_MAX_SECTORS_MAX);
1266 return -EINVAL;
1267 }
1268 }
1269 /*
1270 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
1271 */
1272 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
1273 dev->se_sub_dev->se_dev_attrib.block_size);
1274
1275 dev->se_sub_dev->se_dev_attrib.fabric_max_sectors = fabric_max_sectors;
1276 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
1277 dev, fabric_max_sectors);
1278 return 0;
1279 }
1280
1281 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1282 {
1283 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1284 pr_err("dev[%p]: Unable to change SE Device"
1285 " optimal_sectors while dev_export_obj: %d count exists\n",
1286 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1287 return -EINVAL;
1288 }
1289 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1290 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1291 " changed for TCM/pSCSI\n", dev);
1292 return -EINVAL;
1293 }
1294 if (optimal_sectors > dev->se_sub_dev->se_dev_attrib.fabric_max_sectors) {
1295 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1296 " greater than fabric_max_sectors: %u\n", dev,
1297 optimal_sectors, dev->se_sub_dev->se_dev_attrib.fabric_max_sectors);
1298 return -EINVAL;
1299 }
1300
1301 dev->se_sub_dev->se_dev_attrib.optimal_sectors = optimal_sectors;
1302 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1303 dev, optimal_sectors);
1304 return 0;
1305 }
1306
1307 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1308 {
1309 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1310 pr_err("dev[%p]: Unable to change SE Device block_size"
1311 " while dev_export_obj: %d count exists\n", dev,
1312 atomic_read(&dev->dev_export_obj.obj_access_count));
1313 return -EINVAL;
1314 }
1315
1316 if ((block_size != 512) &&
1317 (block_size != 1024) &&
1318 (block_size != 2048) &&
1319 (block_size != 4096)) {
1320 pr_err("dev[%p]: Illegal value for block_device: %u"
1321 " for SE device, must be 512, 1024, 2048 or 4096\n",
1322 dev, block_size);
1323 return -EINVAL;
1324 }
1325
1326 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1327 pr_err("dev[%p]: Not allowed to change block_size for"
1328 " Physical Device, use for Linux/SCSI to change"
1329 " block_size for underlying hardware\n", dev);
1330 return -EINVAL;
1331 }
1332
1333 dev->se_sub_dev->se_dev_attrib.block_size = block_size;
1334 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1335 dev, block_size);
1336 return 0;
1337 }
1338
1339 struct se_lun *core_dev_add_lun(
1340 struct se_portal_group *tpg,
1341 struct se_hba *hba,
1342 struct se_device *dev,
1343 u32 lun)
1344 {
1345 struct se_lun *lun_p;
1346 u32 lun_access = 0;
1347 int rc;
1348
1349 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1350 pr_err("Unable to export struct se_device while dev_access_obj: %d\n",
1351 atomic_read(&dev->dev_access_obj.obj_access_count));
1352 return ERR_PTR(-EACCES);
1353 }
1354
1355 lun_p = core_tpg_pre_addlun(tpg, lun);
1356 if (IS_ERR(lun_p))
1357 return lun_p;
1358
1359 if (dev->dev_flags & DF_READ_ONLY)
1360 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1361 else
1362 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1363
1364 rc = core_tpg_post_addlun(tpg, lun_p, lun_access, dev);
1365 if (rc < 0)
1366 return ERR_PTR(rc);
1367
1368 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1369 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1370 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1371 tpg->se_tpg_tfo->get_fabric_name(), hba->hba_id);
1372 /*
1373 * Update LUN maps for dynamically added initiators when
1374 * generate_node_acl is enabled.
1375 */
1376 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1377 struct se_node_acl *acl;
1378 spin_lock_irq(&tpg->acl_node_lock);
1379 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1380 if (acl->dynamic_node_acl &&
1381 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1382 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1383 spin_unlock_irq(&tpg->acl_node_lock);
1384 core_tpg_add_node_to_devs(acl, tpg);
1385 spin_lock_irq(&tpg->acl_node_lock);
1386 }
1387 }
1388 spin_unlock_irq(&tpg->acl_node_lock);
1389 }
1390
1391 return lun_p;
1392 }
1393
1394 /* core_dev_del_lun():
1395 *
1396 *
1397 */
1398 int core_dev_del_lun(
1399 struct se_portal_group *tpg,
1400 u32 unpacked_lun)
1401 {
1402 struct se_lun *lun;
1403
1404 lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1405 if (IS_ERR(lun))
1406 return PTR_ERR(lun);
1407
1408 core_tpg_post_dellun(tpg, lun);
1409
1410 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1411 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1412 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1413 tpg->se_tpg_tfo->get_fabric_name());
1414
1415 return 0;
1416 }
1417
1418 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1419 {
1420 struct se_lun *lun;
1421
1422 spin_lock(&tpg->tpg_lun_lock);
1423 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1424 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1425 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1426 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1427 TRANSPORT_MAX_LUNS_PER_TPG-1,
1428 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1429 spin_unlock(&tpg->tpg_lun_lock);
1430 return NULL;
1431 }
1432 lun = &tpg->tpg_lun_list[unpacked_lun];
1433
1434 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1435 pr_err("%s Logical Unit Number: %u is not free on"
1436 " Target Portal Group: %hu, ignoring request.\n",
1437 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1438 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1439 spin_unlock(&tpg->tpg_lun_lock);
1440 return NULL;
1441 }
1442 spin_unlock(&tpg->tpg_lun_lock);
1443
1444 return lun;
1445 }
1446
1447 /* core_dev_get_lun():
1448 *
1449 *
1450 */
1451 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1452 {
1453 struct se_lun *lun;
1454
1455 spin_lock(&tpg->tpg_lun_lock);
1456 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1457 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1458 "_TPG-1: %u for Target Portal Group: %hu\n",
1459 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1460 TRANSPORT_MAX_LUNS_PER_TPG-1,
1461 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1462 spin_unlock(&tpg->tpg_lun_lock);
1463 return NULL;
1464 }
1465 lun = &tpg->tpg_lun_list[unpacked_lun];
1466
1467 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1468 pr_err("%s Logical Unit Number: %u is not active on"
1469 " Target Portal Group: %hu, ignoring request.\n",
1470 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1471 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1472 spin_unlock(&tpg->tpg_lun_lock);
1473 return NULL;
1474 }
1475 spin_unlock(&tpg->tpg_lun_lock);
1476
1477 return lun;
1478 }
1479
1480 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1481 struct se_portal_group *tpg,
1482 u32 mapped_lun,
1483 char *initiatorname,
1484 int *ret)
1485 {
1486 struct se_lun_acl *lacl;
1487 struct se_node_acl *nacl;
1488
1489 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1490 pr_err("%s InitiatorName exceeds maximum size.\n",
1491 tpg->se_tpg_tfo->get_fabric_name());
1492 *ret = -EOVERFLOW;
1493 return NULL;
1494 }
1495 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1496 if (!nacl) {
1497 *ret = -EINVAL;
1498 return NULL;
1499 }
1500 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1501 if (!lacl) {
1502 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1503 *ret = -ENOMEM;
1504 return NULL;
1505 }
1506
1507 INIT_LIST_HEAD(&lacl->lacl_list);
1508 lacl->mapped_lun = mapped_lun;
1509 lacl->se_lun_nacl = nacl;
1510 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1511
1512 return lacl;
1513 }
1514
1515 int core_dev_add_initiator_node_lun_acl(
1516 struct se_portal_group *tpg,
1517 struct se_lun_acl *lacl,
1518 u32 unpacked_lun,
1519 u32 lun_access)
1520 {
1521 struct se_lun *lun;
1522 struct se_node_acl *nacl;
1523
1524 lun = core_dev_get_lun(tpg, unpacked_lun);
1525 if (!lun) {
1526 pr_err("%s Logical Unit Number: %u is not active on"
1527 " Target Portal Group: %hu, ignoring request.\n",
1528 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1529 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1530 return -EINVAL;
1531 }
1532
1533 nacl = lacl->se_lun_nacl;
1534 if (!nacl)
1535 return -EINVAL;
1536
1537 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1538 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1539 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1540
1541 lacl->se_lun = lun;
1542
1543 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1544 lun_access, nacl, tpg, 1) < 0)
1545 return -EINVAL;
1546
1547 spin_lock(&lun->lun_acl_lock);
1548 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1549 atomic_inc(&lun->lun_acl_count);
1550 smp_mb__after_atomic_inc();
1551 spin_unlock(&lun->lun_acl_lock);
1552
1553 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1554 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1555 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1556 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1557 lacl->initiatorname);
1558 /*
1559 * Check to see if there are any existing persistent reservation APTPL
1560 * pre-registrations that need to be enabled for this LUN ACL..
1561 */
1562 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1563 return 0;
1564 }
1565
1566 /* core_dev_del_initiator_node_lun_acl():
1567 *
1568 *
1569 */
1570 int core_dev_del_initiator_node_lun_acl(
1571 struct se_portal_group *tpg,
1572 struct se_lun *lun,
1573 struct se_lun_acl *lacl)
1574 {
1575 struct se_node_acl *nacl;
1576
1577 nacl = lacl->se_lun_nacl;
1578 if (!nacl)
1579 return -EINVAL;
1580
1581 spin_lock(&lun->lun_acl_lock);
1582 list_del(&lacl->lacl_list);
1583 atomic_dec(&lun->lun_acl_count);
1584 smp_mb__after_atomic_dec();
1585 spin_unlock(&lun->lun_acl_lock);
1586
1587 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1588 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1589
1590 lacl->se_lun = NULL;
1591
1592 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1593 " InitiatorNode: %s Mapped LUN: %u\n",
1594 tpg->se_tpg_tfo->get_fabric_name(),
1595 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1596 lacl->initiatorname, lacl->mapped_lun);
1597
1598 return 0;
1599 }
1600
1601 void core_dev_free_initiator_node_lun_acl(
1602 struct se_portal_group *tpg,
1603 struct se_lun_acl *lacl)
1604 {
1605 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1606 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1607 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1608 tpg->se_tpg_tfo->get_fabric_name(),
1609 lacl->initiatorname, lacl->mapped_lun);
1610
1611 kfree(lacl);
1612 }
1613
1614 int core_dev_setup_virtual_lun0(void)
1615 {
1616 struct se_hba *hba;
1617 struct se_device *dev;
1618 struct se_subsystem_dev *se_dev = NULL;
1619 struct se_subsystem_api *t;
1620 char buf[16];
1621 int ret;
1622
1623 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1624 if (IS_ERR(hba))
1625 return PTR_ERR(hba);
1626
1627 lun0_hba = hba;
1628 t = hba->transport;
1629
1630 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1631 if (!se_dev) {
1632 pr_err("Unable to allocate memory for"
1633 " struct se_subsystem_dev\n");
1634 ret = -ENOMEM;
1635 goto out;
1636 }
1637 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1638 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1639 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
1640 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
1641 spin_lock_init(&se_dev->t10_pr.registration_lock);
1642 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
1643 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1644 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1645 spin_lock_init(&se_dev->se_dev_lock);
1646 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1647 se_dev->t10_wwn.t10_sub_dev = se_dev;
1648 se_dev->t10_alua.t10_sub_dev = se_dev;
1649 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1650 se_dev->se_dev_hba = hba;
1651
1652 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1653 if (!se_dev->se_dev_su_ptr) {
1654 pr_err("Unable to locate subsystem dependent pointer"
1655 " from allocate_virtdevice()\n");
1656 ret = -ENOMEM;
1657 goto out;
1658 }
1659 lun0_su_dev = se_dev;
1660
1661 memset(buf, 0, 16);
1662 sprintf(buf, "rd_pages=8");
1663 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1664
1665 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1666 if (IS_ERR(dev)) {
1667 ret = PTR_ERR(dev);
1668 goto out;
1669 }
1670 se_dev->se_dev_ptr = dev;
1671 g_lun0_dev = dev;
1672
1673 return 0;
1674 out:
1675 lun0_su_dev = NULL;
1676 kfree(se_dev);
1677 if (lun0_hba) {
1678 core_delete_hba(lun0_hba);
1679 lun0_hba = NULL;
1680 }
1681 return ret;
1682 }
1683
1684
1685 void core_dev_release_virtual_lun0(void)
1686 {
1687 struct se_hba *hba = lun0_hba;
1688 struct se_subsystem_dev *su_dev = lun0_su_dev;
1689
1690 if (!hba)
1691 return;
1692
1693 if (g_lun0_dev)
1694 se_free_virtual_device(g_lun0_dev, hba);
1695
1696 kfree(su_dev);
1697 core_delete_hba(hba);
1698 }
Linux kernel - Deliverables
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