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Merge branch 'for-rmk/virt/kvm/core' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / drivers / target / target_core_device.c
blobf2aa7543d20aca556855c4fbde2ba3aa00b8ffcc
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 * (c) Copyright 2003-2012 RisingTide Systems LLC.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 *
25 ******************************************************************************/
26
27 #include <linux/net.h>
28 #include <linux/string.h>
29 #include <linux/delay.h>
30 #include <linux/timer.h>
31 #include <linux/slab.h>
32 #include <linux/spinlock.h>
33 #include <linux/kthread.h>
34 #include <linux/in.h>
35 #include <linux/export.h>
36 #include <net/sock.h>
37 #include <net/tcp.h>
38 #include <scsi/scsi.h>
39 #include <scsi/scsi_device.h>
40
41 #include <target/target_core_base.h>
42 #include <target/target_core_backend.h>
43 #include <target/target_core_fabric.h>
44
45 #include "target_core_internal.h"
46 #include "target_core_alua.h"
47 #include "target_core_pr.h"
48 #include "target_core_ua.h"
49
50 static struct se_hba *lun0_hba;
51 /* not static, needed by tpg.c */
52 struct se_device *g_lun0_dev;
53
54 sense_reason_t
55 transport_lookup_cmd_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
56 {
57 struct se_lun *se_lun = NULL;
58 struct se_session *se_sess = se_cmd->se_sess;
59 struct se_device *dev;
60 unsigned long flags;
61
62 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
63 return TCM_NON_EXISTENT_LUN;
64
65 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
66 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
67 if (se_cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
68 struct se_dev_entry *deve = se_cmd->se_deve;
69
70 deve->total_cmds++;
71 deve->total_bytes += se_cmd->data_length;
72
73 if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
74 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
75 pr_err("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
76 " Access for 0x%08x\n",
77 se_cmd->se_tfo->get_fabric_name(),
78 unpacked_lun);
79 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
80 return TCM_WRITE_PROTECTED;
81 }
82
83 if (se_cmd->data_direction == DMA_TO_DEVICE)
84 deve->write_bytes += se_cmd->data_length;
85 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
86 deve->read_bytes += se_cmd->data_length;
87
88 deve->deve_cmds++;
89
90 se_lun = deve->se_lun;
91 se_cmd->se_lun = deve->se_lun;
92 se_cmd->pr_res_key = deve->pr_res_key;
93 se_cmd->orig_fe_lun = unpacked_lun;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
95 }
96 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
97
98 if (!se_lun) {
99 /*
100 * Use the se_portal_group->tpg_virt_lun0 to allow for
101 * REPORT_LUNS, et al to be returned when no active
102 * MappedLUN=0 exists for this Initiator Port.
103 */
104 if (unpacked_lun != 0) {
105 pr_err("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
106 " Access for 0x%08x\n",
107 se_cmd->se_tfo->get_fabric_name(),
108 unpacked_lun);
109 return TCM_NON_EXISTENT_LUN;
110 }
111 /*
112 * Force WRITE PROTECT for virtual LUN 0
113 */
114 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
115 (se_cmd->data_direction != DMA_NONE))
116 return TCM_WRITE_PROTECTED;
117
118 se_lun = &se_sess->se_tpg->tpg_virt_lun0;
119 se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
120 se_cmd->orig_fe_lun = 0;
121 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
122 }
123
124 /* Directly associate cmd with se_dev */
125 se_cmd->se_dev = se_lun->lun_se_dev;
126
127 /* TODO: get rid of this and use atomics for stats */
128 dev = se_lun->lun_se_dev;
129 spin_lock_irqsave(&dev->stats_lock, flags);
130 dev->num_cmds++;
131 if (se_cmd->data_direction == DMA_TO_DEVICE)
132 dev->write_bytes += se_cmd->data_length;
133 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
134 dev->read_bytes += se_cmd->data_length;
135 spin_unlock_irqrestore(&dev->stats_lock, flags);
136
137 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
138 list_add_tail(&se_cmd->se_lun_node, &se_lun->lun_cmd_list);
139 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
140
141 return 0;
142 }
143 EXPORT_SYMBOL(transport_lookup_cmd_lun);
144
145 int transport_lookup_tmr_lun(struct se_cmd *se_cmd, u32 unpacked_lun)
146 {
147 struct se_dev_entry *deve;
148 struct se_lun *se_lun = NULL;
149 struct se_session *se_sess = se_cmd->se_sess;
150 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
151 unsigned long flags;
152
153 if (unpacked_lun >= TRANSPORT_MAX_LUNS_PER_TPG)
154 return -ENODEV;
155
156 spin_lock_irqsave(&se_sess->se_node_acl->device_list_lock, flags);
157 se_cmd->se_deve = se_sess->se_node_acl->device_list[unpacked_lun];
158 deve = se_cmd->se_deve;
159
160 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
161 se_tmr->tmr_lun = deve->se_lun;
162 se_cmd->se_lun = deve->se_lun;
163 se_lun = deve->se_lun;
164 se_cmd->pr_res_key = deve->pr_res_key;
165 se_cmd->orig_fe_lun = unpacked_lun;
166 }
167 spin_unlock_irqrestore(&se_sess->se_node_acl->device_list_lock, flags);
168
169 if (!se_lun) {
170 pr_debug("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
171 " Access for 0x%08x\n",
172 se_cmd->se_tfo->get_fabric_name(),
173 unpacked_lun);
174 return -ENODEV;
175 }
176
177 /* Directly associate cmd with se_dev */
178 se_cmd->se_dev = se_lun->lun_se_dev;
179 se_tmr->tmr_dev = se_lun->lun_se_dev;
180
181 spin_lock_irqsave(&se_tmr->tmr_dev->se_tmr_lock, flags);
182 list_add_tail(&se_tmr->tmr_list, &se_tmr->tmr_dev->dev_tmr_list);
183 spin_unlock_irqrestore(&se_tmr->tmr_dev->se_tmr_lock, flags);
184
185 return 0;
186 }
187 EXPORT_SYMBOL(transport_lookup_tmr_lun);
188
189 /*
190 * This function is called from core_scsi3_emulate_pro_register_and_move()
191 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
192 * when a matching rtpi is found.
193 */
194 struct se_dev_entry *core_get_se_deve_from_rtpi(
195 struct se_node_acl *nacl,
196 u16 rtpi)
197 {
198 struct se_dev_entry *deve;
199 struct se_lun *lun;
200 struct se_port *port;
201 struct se_portal_group *tpg = nacl->se_tpg;
202 u32 i;
203
204 spin_lock_irq(&nacl->device_list_lock);
205 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
206 deve = nacl->device_list[i];
207
208 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
209 continue;
210
211 lun = deve->se_lun;
212 if (!lun) {
213 pr_err("%s device entries device pointer is"
214 " NULL, but Initiator has access.\n",
215 tpg->se_tpg_tfo->get_fabric_name());
216 continue;
217 }
218 port = lun->lun_sep;
219 if (!port) {
220 pr_err("%s device entries device pointer is"
221 " NULL, but Initiator has access.\n",
222 tpg->se_tpg_tfo->get_fabric_name());
223 continue;
224 }
225 if (port->sep_rtpi != rtpi)
226 continue;
227
228 atomic_inc(&deve->pr_ref_count);
229 smp_mb__after_atomic_inc();
230 spin_unlock_irq(&nacl->device_list_lock);
231
232 return deve;
233 }
234 spin_unlock_irq(&nacl->device_list_lock);
235
236 return NULL;
237 }
238
239 int core_free_device_list_for_node(
240 struct se_node_acl *nacl,
241 struct se_portal_group *tpg)
242 {
243 struct se_dev_entry *deve;
244 struct se_lun *lun;
245 u32 i;
246
247 if (!nacl->device_list)
248 return 0;
249
250 spin_lock_irq(&nacl->device_list_lock);
251 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
252 deve = nacl->device_list[i];
253
254 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
255 continue;
256
257 if (!deve->se_lun) {
258 pr_err("%s device entries device pointer is"
259 " NULL, but Initiator has access.\n",
260 tpg->se_tpg_tfo->get_fabric_name());
261 continue;
262 }
263 lun = deve->se_lun;
264
265 spin_unlock_irq(&nacl->device_list_lock);
266 core_disable_device_list_for_node(lun, NULL, deve->mapped_lun,
267 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
268 spin_lock_irq(&nacl->device_list_lock);
269 }
270 spin_unlock_irq(&nacl->device_list_lock);
271
272 array_free(nacl->device_list, TRANSPORT_MAX_LUNS_PER_TPG);
273 nacl->device_list = NULL;
274
275 return 0;
276 }
277
278 void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
279 {
280 struct se_dev_entry *deve;
281 unsigned long flags;
282
283 spin_lock_irqsave(&se_nacl->device_list_lock, flags);
284 deve = se_nacl->device_list[se_cmd->orig_fe_lun];
285 deve->deve_cmds--;
286 spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
287 }
288
289 void core_update_device_list_access(
290 u32 mapped_lun,
291 u32 lun_access,
292 struct se_node_acl *nacl)
293 {
294 struct se_dev_entry *deve;
295
296 spin_lock_irq(&nacl->device_list_lock);
297 deve = nacl->device_list[mapped_lun];
298 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
299 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
300 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
301 } else {
302 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
303 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
304 }
305 spin_unlock_irq(&nacl->device_list_lock);
306 }
307
308 /* core_enable_device_list_for_node():
309 *
310 *
311 */
312 int core_enable_device_list_for_node(
313 struct se_lun *lun,
314 struct se_lun_acl *lun_acl,
315 u32 mapped_lun,
316 u32 lun_access,
317 struct se_node_acl *nacl,
318 struct se_portal_group *tpg)
319 {
320 struct se_port *port = lun->lun_sep;
321 struct se_dev_entry *deve;
322
323 spin_lock_irq(&nacl->device_list_lock);
324
325 deve = nacl->device_list[mapped_lun];
326
327 /*
328 * Check if the call is handling demo mode -> explict LUN ACL
329 * transition. This transition must be for the same struct se_lun
330 * + mapped_lun that was setup in demo mode..
331 */
332 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
333 if (deve->se_lun_acl != NULL) {
334 pr_err("struct se_dev_entry->se_lun_acl"
335 " already set for demo mode -> explict"
336 " LUN ACL transition\n");
337 spin_unlock_irq(&nacl->device_list_lock);
338 return -EINVAL;
339 }
340 if (deve->se_lun != lun) {
341 pr_err("struct se_dev_entry->se_lun does"
342 " match passed struct se_lun for demo mode"
343 " -> explict LUN ACL transition\n");
344 spin_unlock_irq(&nacl->device_list_lock);
345 return -EINVAL;
346 }
347 deve->se_lun_acl = lun_acl;
348
349 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
350 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
351 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
352 } else {
353 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
354 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
355 }
356
357 spin_unlock_irq(&nacl->device_list_lock);
358 return 0;
359 }
360
361 deve->se_lun = lun;
362 deve->se_lun_acl = lun_acl;
363 deve->mapped_lun = mapped_lun;
364 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
365
366 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
367 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
368 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
369 } else {
370 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
371 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
372 }
373
374 deve->creation_time = get_jiffies_64();
375 deve->attach_count++;
376 spin_unlock_irq(&nacl->device_list_lock);
377
378 spin_lock_bh(&port->sep_alua_lock);
379 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
380 spin_unlock_bh(&port->sep_alua_lock);
381
382 return 0;
383 }
384
385 /* core_disable_device_list_for_node():
386 *
387 *
388 */
389 int core_disable_device_list_for_node(
390 struct se_lun *lun,
391 struct se_lun_acl *lun_acl,
392 u32 mapped_lun,
393 u32 lun_access,
394 struct se_node_acl *nacl,
395 struct se_portal_group *tpg)
396 {
397 struct se_port *port = lun->lun_sep;
398 struct se_dev_entry *deve = nacl->device_list[mapped_lun];
399
400 /*
401 * If the MappedLUN entry is being disabled, the entry in
402 * port->sep_alua_list must be removed now before clearing the
403 * struct se_dev_entry pointers below as logic in
404 * core_alua_do_transition_tg_pt() depends on these being present.
405 *
406 * deve->se_lun_acl will be NULL for demo-mode created LUNs
407 * that have not been explicitly converted to MappedLUNs ->
408 * struct se_lun_acl, but we remove deve->alua_port_list from
409 * port->sep_alua_list. This also means that active UAs and
410 * NodeACL context specific PR metadata for demo-mode
411 * MappedLUN *deve will be released below..
412 */
413 spin_lock_bh(&port->sep_alua_lock);
414 list_del(&deve->alua_port_list);
415 spin_unlock_bh(&port->sep_alua_lock);
416 /*
417 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
418 * PR operation to complete.
419 */
420 while (atomic_read(&deve->pr_ref_count) != 0)
421 cpu_relax();
422
423 spin_lock_irq(&nacl->device_list_lock);
424 /*
425 * Disable struct se_dev_entry LUN ACL mapping
426 */
427 core_scsi3_ua_release_all(deve);
428 deve->se_lun = NULL;
429 deve->se_lun_acl = NULL;
430 deve->lun_flags = 0;
431 deve->creation_time = 0;
432 deve->attach_count--;
433 spin_unlock_irq(&nacl->device_list_lock);
434
435 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
436 return 0;
437 }
438
439 /* core_clear_lun_from_tpg():
440 *
441 *
442 */
443 void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
444 {
445 struct se_node_acl *nacl;
446 struct se_dev_entry *deve;
447 u32 i;
448
449 spin_lock_irq(&tpg->acl_node_lock);
450 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
451 spin_unlock_irq(&tpg->acl_node_lock);
452
453 spin_lock_irq(&nacl->device_list_lock);
454 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
455 deve = nacl->device_list[i];
456 if (lun != deve->se_lun)
457 continue;
458 spin_unlock_irq(&nacl->device_list_lock);
459
460 core_disable_device_list_for_node(lun, NULL,
461 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
462 nacl, tpg);
463
464 spin_lock_irq(&nacl->device_list_lock);
465 }
466 spin_unlock_irq(&nacl->device_list_lock);
467
468 spin_lock_irq(&tpg->acl_node_lock);
469 }
470 spin_unlock_irq(&tpg->acl_node_lock);
471 }
472
473 static struct se_port *core_alloc_port(struct se_device *dev)
474 {
475 struct se_port *port, *port_tmp;
476
477 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
478 if (!port) {
479 pr_err("Unable to allocate struct se_port\n");
480 return ERR_PTR(-ENOMEM);
481 }
482 INIT_LIST_HEAD(&port->sep_alua_list);
483 INIT_LIST_HEAD(&port->sep_list);
484 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
485 spin_lock_init(&port->sep_alua_lock);
486 mutex_init(&port->sep_tg_pt_md_mutex);
487
488 spin_lock(&dev->se_port_lock);
489 if (dev->dev_port_count == 0x0000ffff) {
490 pr_warn("Reached dev->dev_port_count =="
491 " 0x0000ffff\n");
492 spin_unlock(&dev->se_port_lock);
493 return ERR_PTR(-ENOSPC);
494 }
495 again:
496 /*
497 * Allocate the next RELATIVE TARGET PORT IDENTIFIER for this struct se_device
498 * Here is the table from spc4r17 section 7.7.3.8.
499 *
500 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
501 *
502 * Code Description
503 * 0h Reserved
504 * 1h Relative port 1, historically known as port A
505 * 2h Relative port 2, historically known as port B
506 * 3h to FFFFh Relative port 3 through 65 535
507 */
508 port->sep_rtpi = dev->dev_rpti_counter++;
509 if (!port->sep_rtpi)
510 goto again;
511
512 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
513 /*
514 * Make sure RELATIVE TARGET PORT IDENTIFIER is unique
515 * for 16-bit wrap..
516 */
517 if (port->sep_rtpi == port_tmp->sep_rtpi)
518 goto again;
519 }
520 spin_unlock(&dev->se_port_lock);
521
522 return port;
523 }
524
525 static void core_export_port(
526 struct se_device *dev,
527 struct se_portal_group *tpg,
528 struct se_port *port,
529 struct se_lun *lun)
530 {
531 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
532
533 spin_lock(&dev->se_port_lock);
534 spin_lock(&lun->lun_sep_lock);
535 port->sep_tpg = tpg;
536 port->sep_lun = lun;
537 lun->lun_sep = port;
538 spin_unlock(&lun->lun_sep_lock);
539
540 list_add_tail(&port->sep_list, &dev->dev_sep_list);
541 spin_unlock(&dev->se_port_lock);
542
543 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV &&
544 !(dev->se_hba->hba_flags & HBA_FLAGS_INTERNAL_USE)) {
545 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
546 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
547 pr_err("Unable to allocate t10_alua_tg_pt"
548 "_gp_member_t\n");
549 return;
550 }
551 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
552 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
553 dev->t10_alua.default_tg_pt_gp);
554 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
555 pr_debug("%s/%s: Adding to default ALUA Target Port"
556 " Group: alua/default_tg_pt_gp\n",
557 dev->transport->name, tpg->se_tpg_tfo->get_fabric_name());
558 }
559
560 dev->dev_port_count++;
561 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFIER */
562 }
563
564 /*
565 * Called with struct se_device->se_port_lock spinlock held.
566 */
567 static void core_release_port(struct se_device *dev, struct se_port *port)
568 __releases(&dev->se_port_lock) __acquires(&dev->se_port_lock)
569 {
570 /*
571 * Wait for any port reference for PR ALL_TG_PT=1 operation
572 * to complete in __core_scsi3_alloc_registration()
573 */
574 spin_unlock(&dev->se_port_lock);
575 if (atomic_read(&port->sep_tg_pt_ref_cnt))
576 cpu_relax();
577 spin_lock(&dev->se_port_lock);
578
579 core_alua_free_tg_pt_gp_mem(port);
580
581 list_del(&port->sep_list);
582 dev->dev_port_count--;
583 kfree(port);
584 }
585
586 int core_dev_export(
587 struct se_device *dev,
588 struct se_portal_group *tpg,
589 struct se_lun *lun)
590 {
591 struct se_hba *hba = dev->se_hba;
592 struct se_port *port;
593
594 port = core_alloc_port(dev);
595 if (IS_ERR(port))
596 return PTR_ERR(port);
597
598 lun->lun_se_dev = dev;
599
600 spin_lock(&hba->device_lock);
601 dev->export_count++;
602 spin_unlock(&hba->device_lock);
603
604 core_export_port(dev, tpg, port, lun);
605 return 0;
606 }
607
608 void core_dev_unexport(
609 struct se_device *dev,
610 struct se_portal_group *tpg,
611 struct se_lun *lun)
612 {
613 struct se_hba *hba = dev->se_hba;
614 struct se_port *port = lun->lun_sep;
615
616 spin_lock(&lun->lun_sep_lock);
617 if (lun->lun_se_dev == NULL) {
618 spin_unlock(&lun->lun_sep_lock);
619 return;
620 }
621 spin_unlock(&lun->lun_sep_lock);
622
623 spin_lock(&dev->se_port_lock);
624 core_release_port(dev, port);
625 spin_unlock(&dev->se_port_lock);
626
627 spin_lock(&hba->device_lock);
628 dev->export_count--;
629 spin_unlock(&hba->device_lock);
630
631 lun->lun_se_dev = NULL;
632 }
633
634 static void se_release_vpd_for_dev(struct se_device *dev)
635 {
636 struct t10_vpd *vpd, *vpd_tmp;
637
638 spin_lock(&dev->t10_wwn.t10_vpd_lock);
639 list_for_each_entry_safe(vpd, vpd_tmp,
640 &dev->t10_wwn.t10_vpd_list, vpd_list) {
641 list_del(&vpd->vpd_list);
642 kfree(vpd);
643 }
644 spin_unlock(&dev->t10_wwn.t10_vpd_lock);
645 }
646
647 static u32 se_dev_align_max_sectors(u32 max_sectors, u32 block_size)
648 {
649 u32 aligned_max_sectors;
650 u32 alignment;
651 /*
652 * Limit max_sectors to a PAGE_SIZE aligned value for modern
653 * transport_allocate_data_tasks() operation.
654 */
655 alignment = max(1ul, PAGE_SIZE / block_size);
656 aligned_max_sectors = rounddown(max_sectors, alignment);
657
658 if (max_sectors != aligned_max_sectors)
659 pr_info("Rounding down aligned max_sectors from %u to %u\n",
660 max_sectors, aligned_max_sectors);
661
662 return aligned_max_sectors;
663 }
664
665 int se_dev_set_max_unmap_lba_count(
666 struct se_device *dev,
667 u32 max_unmap_lba_count)
668 {
669 dev->dev_attrib.max_unmap_lba_count = max_unmap_lba_count;
670 pr_debug("dev[%p]: Set max_unmap_lba_count: %u\n",
671 dev, dev->dev_attrib.max_unmap_lba_count);
672 return 0;
673 }
674
675 int se_dev_set_max_unmap_block_desc_count(
676 struct se_device *dev,
677 u32 max_unmap_block_desc_count)
678 {
679 dev->dev_attrib.max_unmap_block_desc_count =
680 max_unmap_block_desc_count;
681 pr_debug("dev[%p]: Set max_unmap_block_desc_count: %u\n",
682 dev, dev->dev_attrib.max_unmap_block_desc_count);
683 return 0;
684 }
685
686 int se_dev_set_unmap_granularity(
687 struct se_device *dev,
688 u32 unmap_granularity)
689 {
690 dev->dev_attrib.unmap_granularity = unmap_granularity;
691 pr_debug("dev[%p]: Set unmap_granularity: %u\n",
692 dev, dev->dev_attrib.unmap_granularity);
693 return 0;
694 }
695
696 int se_dev_set_unmap_granularity_alignment(
697 struct se_device *dev,
698 u32 unmap_granularity_alignment)
699 {
700 dev->dev_attrib.unmap_granularity_alignment = unmap_granularity_alignment;
701 pr_debug("dev[%p]: Set unmap_granularity_alignment: %u\n",
702 dev, dev->dev_attrib.unmap_granularity_alignment);
703 return 0;
704 }
705
706 int se_dev_set_max_write_same_len(
707 struct se_device *dev,
708 u32 max_write_same_len)
709 {
710 dev->dev_attrib.max_write_same_len = max_write_same_len;
711 pr_debug("dev[%p]: Set max_write_same_len: %u\n",
712 dev, dev->dev_attrib.max_write_same_len);
713 return 0;
714 }
715
716 int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
717 {
718 if (flag != 0 && flag != 1) {
719 pr_err("Illegal value %d\n", flag);
720 return -EINVAL;
721 }
722
723 if (flag) {
724 pr_err("dpo_emulated not supported\n");
725 return -EINVAL;
726 }
727
728 return 0;
729 }
730
731 int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
732 {
733 if (flag != 0 && flag != 1) {
734 pr_err("Illegal value %d\n", flag);
735 return -EINVAL;
736 }
737
738 if (flag &&
739 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
740 pr_err("emulate_fua_write not supported for pSCSI\n");
741 return -EINVAL;
742 }
743 dev->dev_attrib.emulate_fua_write = flag;
744 pr_debug("dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
745 dev, dev->dev_attrib.emulate_fua_write);
746 return 0;
747 }
748
749 int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
750 {
751 if (flag != 0 && flag != 1) {
752 pr_err("Illegal value %d\n", flag);
753 return -EINVAL;
754 }
755
756 if (flag) {
757 pr_err("ua read emulated not supported\n");
758 return -EINVAL;
759 }
760
761 return 0;
762 }
763
764 int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
765 {
766 if (flag != 0 && flag != 1) {
767 pr_err("Illegal value %d\n", flag);
768 return -EINVAL;
769 }
770 if (flag &&
771 dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
772 pr_err("emulate_write_cache not supported for pSCSI\n");
773 return -EINVAL;
774 }
775 dev->dev_attrib.emulate_write_cache = flag;
776 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
777 dev, dev->dev_attrib.emulate_write_cache);
778 return 0;
779 }
780
781 int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
782 {
783 if ((flag != 0) && (flag != 1) && (flag != 2)) {
784 pr_err("Illegal value %d\n", flag);
785 return -EINVAL;
786 }
787
788 if (dev->export_count) {
789 pr_err("dev[%p]: Unable to change SE Device"
790 " UA_INTRLCK_CTRL while export_count is %d\n",
791 dev, dev->export_count);
792 return -EINVAL;
793 }
794 dev->dev_attrib.emulate_ua_intlck_ctrl = flag;
795 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
796 dev, dev->dev_attrib.emulate_ua_intlck_ctrl);
797
798 return 0;
799 }
800
801 int se_dev_set_emulate_tas(struct se_device *dev, int flag)
802 {
803 if ((flag != 0) && (flag != 1)) {
804 pr_err("Illegal value %d\n", flag);
805 return -EINVAL;
806 }
807
808 if (dev->export_count) {
809 pr_err("dev[%p]: Unable to change SE Device TAS while"
810 " export_count is %d\n",
811 dev, dev->export_count);
812 return -EINVAL;
813 }
814 dev->dev_attrib.emulate_tas = flag;
815 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
816 dev, (dev->dev_attrib.emulate_tas) ? "Enabled" : "Disabled");
817
818 return 0;
819 }
820
821 int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
822 {
823 if ((flag != 0) && (flag != 1)) {
824 pr_err("Illegal value %d\n", flag);
825 return -EINVAL;
826 }
827 /*
828 * We expect this value to be non-zero when generic Block Layer
829 * Discard supported is detected iblock_create_virtdevice().
830 */
831 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
832 pr_err("Generic Block Discard not supported\n");
833 return -ENOSYS;
834 }
835
836 dev->dev_attrib.emulate_tpu = flag;
837 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
838 dev, flag);
839 return 0;
840 }
841
842 int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
843 {
844 if ((flag != 0) && (flag != 1)) {
845 pr_err("Illegal value %d\n", flag);
846 return -EINVAL;
847 }
848 /*
849 * We expect this value to be non-zero when generic Block Layer
850 * Discard supported is detected iblock_create_virtdevice().
851 */
852 if (flag && !dev->dev_attrib.max_unmap_block_desc_count) {
853 pr_err("Generic Block Discard not supported\n");
854 return -ENOSYS;
855 }
856
857 dev->dev_attrib.emulate_tpws = flag;
858 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
859 dev, flag);
860 return 0;
861 }
862
863 int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
864 {
865 if ((flag != 0) && (flag != 1)) {
866 pr_err("Illegal value %d\n", flag);
867 return -EINVAL;
868 }
869 dev->dev_attrib.enforce_pr_isids = flag;
870 pr_debug("dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
871 (dev->dev_attrib.enforce_pr_isids) ? "Enabled" : "Disabled");
872 return 0;
873 }
874
875 int se_dev_set_is_nonrot(struct se_device *dev, int flag)
876 {
877 if ((flag != 0) && (flag != 1)) {
878 printk(KERN_ERR "Illegal value %d\n", flag);
879 return -EINVAL;
880 }
881 dev->dev_attrib.is_nonrot = flag;
882 pr_debug("dev[%p]: SE Device is_nonrot bit: %d\n",
883 dev, flag);
884 return 0;
885 }
886
887 int se_dev_set_emulate_rest_reord(struct se_device *dev, int flag)
888 {
889 if (flag != 0) {
890 printk(KERN_ERR "dev[%p]: SE Device emulatation of restricted"
891 " reordering not implemented\n", dev);
892 return -ENOSYS;
893 }
894 dev->dev_attrib.emulate_rest_reord = flag;
895 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n", dev, flag);
896 return 0;
897 }
898
899 /*
900 * Note, this can only be called on unexported SE Device Object.
901 */
902 int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
903 {
904 if (dev->export_count) {
905 pr_err("dev[%p]: Unable to change SE Device TCQ while"
906 " export_count is %d\n",
907 dev, dev->export_count);
908 return -EINVAL;
909 }
910 if (!queue_depth) {
911 pr_err("dev[%p]: Illegal ZERO value for queue"
912 "_depth\n", dev);
913 return -EINVAL;
914 }
915
916 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
917 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
918 pr_err("dev[%p]: Passed queue_depth: %u"
919 " exceeds TCM/SE_Device TCQ: %u\n",
920 dev, queue_depth,
921 dev->dev_attrib.hw_queue_depth);
922 return -EINVAL;
923 }
924 } else {
925 if (queue_depth > dev->dev_attrib.queue_depth) {
926 if (queue_depth > dev->dev_attrib.hw_queue_depth) {
927 pr_err("dev[%p]: Passed queue_depth:"
928 " %u exceeds TCM/SE_Device MAX"
929 " TCQ: %u\n", dev, queue_depth,
930 dev->dev_attrib.hw_queue_depth);
931 return -EINVAL;
932 }
933 }
934 }
935
936 dev->dev_attrib.queue_depth = dev->queue_depth = queue_depth;
937 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n",
938 dev, queue_depth);
939 return 0;
940 }
941
942 int se_dev_set_fabric_max_sectors(struct se_device *dev, u32 fabric_max_sectors)
943 {
944 int block_size = dev->dev_attrib.block_size;
945
946 if (dev->export_count) {
947 pr_err("dev[%p]: Unable to change SE Device"
948 " fabric_max_sectors while export_count is %d\n",
949 dev, dev->export_count);
950 return -EINVAL;
951 }
952 if (!fabric_max_sectors) {
953 pr_err("dev[%p]: Illegal ZERO value for"
954 " fabric_max_sectors\n", dev);
955 return -EINVAL;
956 }
957 if (fabric_max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
958 pr_err("dev[%p]: Passed fabric_max_sectors: %u less than"
959 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, fabric_max_sectors,
960 DA_STATUS_MAX_SECTORS_MIN);
961 return -EINVAL;
962 }
963 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
964 if (fabric_max_sectors > dev->dev_attrib.hw_max_sectors) {
965 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
966 " greater than TCM/SE_Device max_sectors:"
967 " %u\n", dev, fabric_max_sectors,
968 dev->dev_attrib.hw_max_sectors);
969 return -EINVAL;
970 }
971 } else {
972 if (fabric_max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
973 pr_err("dev[%p]: Passed fabric_max_sectors: %u"
974 " greater than DA_STATUS_MAX_SECTORS_MAX:"
975 " %u\n", dev, fabric_max_sectors,
976 DA_STATUS_MAX_SECTORS_MAX);
977 return -EINVAL;
978 }
979 }
980 /*
981 * Align max_sectors down to PAGE_SIZE to follow transport_allocate_data_tasks()
982 */
983 if (!block_size) {
984 block_size = 512;
985 pr_warn("Defaulting to 512 for zero block_size\n");
986 }
987 fabric_max_sectors = se_dev_align_max_sectors(fabric_max_sectors,
988 block_size);
989
990 dev->dev_attrib.fabric_max_sectors = fabric_max_sectors;
991 pr_debug("dev[%p]: SE Device max_sectors changed to %u\n",
992 dev, fabric_max_sectors);
993 return 0;
994 }
995
996 int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
997 {
998 if (dev->export_count) {
999 pr_err("dev[%p]: Unable to change SE Device"
1000 " optimal_sectors while export_count is %d\n",
1001 dev, dev->export_count);
1002 return -EINVAL;
1003 }
1004 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1005 pr_err("dev[%p]: Passed optimal_sectors cannot be"
1006 " changed for TCM/pSCSI\n", dev);
1007 return -EINVAL;
1008 }
1009 if (optimal_sectors > dev->dev_attrib.fabric_max_sectors) {
1010 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1011 " greater than fabric_max_sectors: %u\n", dev,
1012 optimal_sectors, dev->dev_attrib.fabric_max_sectors);
1013 return -EINVAL;
1014 }
1015
1016 dev->dev_attrib.optimal_sectors = optimal_sectors;
1017 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1018 dev, optimal_sectors);
1019 return 0;
1020 }
1021
1022 int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1023 {
1024 if (dev->export_count) {
1025 pr_err("dev[%p]: Unable to change SE Device block_size"
1026 " while export_count is %d\n",
1027 dev, dev->export_count);
1028 return -EINVAL;
1029 }
1030
1031 if ((block_size != 512) &&
1032 (block_size != 1024) &&
1033 (block_size != 2048) &&
1034 (block_size != 4096)) {
1035 pr_err("dev[%p]: Illegal value for block_device: %u"
1036 " for SE device, must be 512, 1024, 2048 or 4096\n",
1037 dev, block_size);
1038 return -EINVAL;
1039 }
1040
1041 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1042 pr_err("dev[%p]: Not allowed to change block_size for"
1043 " Physical Device, use for Linux/SCSI to change"
1044 " block_size for underlying hardware\n", dev);
1045 return -EINVAL;
1046 }
1047
1048 dev->dev_attrib.block_size = block_size;
1049 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1050 dev, block_size);
1051 return 0;
1052 }
1053
1054 struct se_lun *core_dev_add_lun(
1055 struct se_portal_group *tpg,
1056 struct se_device *dev,
1057 u32 lun)
1058 {
1059 struct se_lun *lun_p;
1060 int rc;
1061
1062 lun_p = core_tpg_pre_addlun(tpg, lun);
1063 if (IS_ERR(lun_p))
1064 return lun_p;
1065
1066 rc = core_tpg_post_addlun(tpg, lun_p,
1067 TRANSPORT_LUNFLAGS_READ_WRITE, dev);
1068 if (rc < 0)
1069 return ERR_PTR(rc);
1070
1071 pr_debug("%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1072 " CORE HBA: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1073 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun_p->unpacked_lun,
1074 tpg->se_tpg_tfo->get_fabric_name(), dev->se_hba->hba_id);
1075 /*
1076 * Update LUN maps for dynamically added initiators when
1077 * generate_node_acl is enabled.
1078 */
1079 if (tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)) {
1080 struct se_node_acl *acl;
1081 spin_lock_irq(&tpg->acl_node_lock);
1082 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1083 if (acl->dynamic_node_acl &&
1084 (!tpg->se_tpg_tfo->tpg_check_demo_mode_login_only ||
1085 !tpg->se_tpg_tfo->tpg_check_demo_mode_login_only(tpg))) {
1086 spin_unlock_irq(&tpg->acl_node_lock);
1087 core_tpg_add_node_to_devs(acl, tpg);
1088 spin_lock_irq(&tpg->acl_node_lock);
1089 }
1090 }
1091 spin_unlock_irq(&tpg->acl_node_lock);
1092 }
1093
1094 return lun_p;
1095 }
1096
1097 /* core_dev_del_lun():
1098 *
1099 *
1100 */
1101 int core_dev_del_lun(
1102 struct se_portal_group *tpg,
1103 u32 unpacked_lun)
1104 {
1105 struct se_lun *lun;
1106
1107 lun = core_tpg_pre_dellun(tpg, unpacked_lun);
1108 if (IS_ERR(lun))
1109 return PTR_ERR(lun);
1110
1111 core_tpg_post_dellun(tpg, lun);
1112
1113 pr_debug("%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1114 " device object\n", tpg->se_tpg_tfo->get_fabric_name(),
1115 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun,
1116 tpg->se_tpg_tfo->get_fabric_name());
1117
1118 return 0;
1119 }
1120
1121 struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1122 {
1123 struct se_lun *lun;
1124
1125 spin_lock(&tpg->tpg_lun_lock);
1126 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1127 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1128 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1129 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1130 TRANSPORT_MAX_LUNS_PER_TPG-1,
1131 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1132 spin_unlock(&tpg->tpg_lun_lock);
1133 return NULL;
1134 }
1135 lun = tpg->tpg_lun_list[unpacked_lun];
1136
1137 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1138 pr_err("%s Logical Unit Number: %u is not free on"
1139 " Target Portal Group: %hu, ignoring request.\n",
1140 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1141 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1142 spin_unlock(&tpg->tpg_lun_lock);
1143 return NULL;
1144 }
1145 spin_unlock(&tpg->tpg_lun_lock);
1146
1147 return lun;
1148 }
1149
1150 /* core_dev_get_lun():
1151 *
1152 *
1153 */
1154 static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1155 {
1156 struct se_lun *lun;
1157
1158 spin_lock(&tpg->tpg_lun_lock);
1159 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1160 pr_err("%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1161 "_TPG-1: %u for Target Portal Group: %hu\n",
1162 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1163 TRANSPORT_MAX_LUNS_PER_TPG-1,
1164 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1165 spin_unlock(&tpg->tpg_lun_lock);
1166 return NULL;
1167 }
1168 lun = tpg->tpg_lun_list[unpacked_lun];
1169
1170 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1171 pr_err("%s Logical Unit Number: %u is not active on"
1172 " Target Portal Group: %hu, ignoring request.\n",
1173 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1174 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1175 spin_unlock(&tpg->tpg_lun_lock);
1176 return NULL;
1177 }
1178 spin_unlock(&tpg->tpg_lun_lock);
1179
1180 return lun;
1181 }
1182
1183 struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1184 struct se_portal_group *tpg,
1185 u32 mapped_lun,
1186 char *initiatorname,
1187 int *ret)
1188 {
1189 struct se_lun_acl *lacl;
1190 struct se_node_acl *nacl;
1191
1192 if (strlen(initiatorname) >= TRANSPORT_IQN_LEN) {
1193 pr_err("%s InitiatorName exceeds maximum size.\n",
1194 tpg->se_tpg_tfo->get_fabric_name());
1195 *ret = -EOVERFLOW;
1196 return NULL;
1197 }
1198 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1199 if (!nacl) {
1200 *ret = -EINVAL;
1201 return NULL;
1202 }
1203 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1204 if (!lacl) {
1205 pr_err("Unable to allocate memory for struct se_lun_acl.\n");
1206 *ret = -ENOMEM;
1207 return NULL;
1208 }
1209
1210 INIT_LIST_HEAD(&lacl->lacl_list);
1211 lacl->mapped_lun = mapped_lun;
1212 lacl->se_lun_nacl = nacl;
1213 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1214
1215 return lacl;
1216 }
1217
1218 int core_dev_add_initiator_node_lun_acl(
1219 struct se_portal_group *tpg,
1220 struct se_lun_acl *lacl,
1221 u32 unpacked_lun,
1222 u32 lun_access)
1223 {
1224 struct se_lun *lun;
1225 struct se_node_acl *nacl;
1226
1227 lun = core_dev_get_lun(tpg, unpacked_lun);
1228 if (!lun) {
1229 pr_err("%s Logical Unit Number: %u is not active on"
1230 " Target Portal Group: %hu, ignoring request.\n",
1231 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
1232 tpg->se_tpg_tfo->tpg_get_tag(tpg));
1233 return -EINVAL;
1234 }
1235
1236 nacl = lacl->se_lun_nacl;
1237 if (!nacl)
1238 return -EINVAL;
1239
1240 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1241 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1242 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1243
1244 lacl->se_lun = lun;
1245
1246 if (core_enable_device_list_for_node(lun, lacl, lacl->mapped_lun,
1247 lun_access, nacl, tpg) < 0)
1248 return -EINVAL;
1249
1250 spin_lock(&lun->lun_acl_lock);
1251 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1252 atomic_inc(&lun->lun_acl_count);
1253 smp_mb__after_atomic_inc();
1254 spin_unlock(&lun->lun_acl_lock);
1255
1256 pr_debug("%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1257 " InitiatorNode: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
1258 tpg->se_tpg_tfo->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1259 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1260 lacl->initiatorname);
1261 /*
1262 * Check to see if there are any existing persistent reservation APTPL
1263 * pre-registrations that need to be enabled for this LUN ACL..
1264 */
1265 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1266 return 0;
1267 }
1268
1269 /* core_dev_del_initiator_node_lun_acl():
1270 *
1271 *
1272 */
1273 int core_dev_del_initiator_node_lun_acl(
1274 struct se_portal_group *tpg,
1275 struct se_lun *lun,
1276 struct se_lun_acl *lacl)
1277 {
1278 struct se_node_acl *nacl;
1279
1280 nacl = lacl->se_lun_nacl;
1281 if (!nacl)
1282 return -EINVAL;
1283
1284 spin_lock(&lun->lun_acl_lock);
1285 list_del(&lacl->lacl_list);
1286 atomic_dec(&lun->lun_acl_count);
1287 smp_mb__after_atomic_dec();
1288 spin_unlock(&lun->lun_acl_lock);
1289
1290 core_disable_device_list_for_node(lun, NULL, lacl->mapped_lun,
1291 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg);
1292
1293 lacl->se_lun = NULL;
1294
1295 pr_debug("%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1296 " InitiatorNode: %s Mapped LUN: %u\n",
1297 tpg->se_tpg_tfo->get_fabric_name(),
1298 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
1299 lacl->initiatorname, lacl->mapped_lun);
1300
1301 return 0;
1302 }
1303
1304 void core_dev_free_initiator_node_lun_acl(
1305 struct se_portal_group *tpg,
1306 struct se_lun_acl *lacl)
1307 {
1308 pr_debug("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1309 " Mapped LUN: %u\n", tpg->se_tpg_tfo->get_fabric_name(),
1310 tpg->se_tpg_tfo->tpg_get_tag(tpg),
1311 tpg->se_tpg_tfo->get_fabric_name(),
1312 lacl->initiatorname, lacl->mapped_lun);
1313
1314 kfree(lacl);
1315 }
1316
1317 static void scsi_dump_inquiry(struct se_device *dev)
1318 {
1319 struct t10_wwn *wwn = &dev->t10_wwn;
1320 char buf[17];
1321 int i, device_type;
1322 /*
1323 * Print Linux/SCSI style INQUIRY formatting to the kernel ring buffer
1324 */
1325 for (i = 0; i < 8; i++)
1326 if (wwn->vendor[i] >= 0x20)
1327 buf[i] = wwn->vendor[i];
1328 else
1329 buf[i] = ' ';
1330 buf[i] = '\0';
1331 pr_debug(" Vendor: %s\n", buf);
1332
1333 for (i = 0; i < 16; i++)
1334 if (wwn->model[i] >= 0x20)
1335 buf[i] = wwn->model[i];
1336 else
1337 buf[i] = ' ';
1338 buf[i] = '\0';
1339 pr_debug(" Model: %s\n", buf);
1340
1341 for (i = 0; i < 4; i++)
1342 if (wwn->revision[i] >= 0x20)
1343 buf[i] = wwn->revision[i];
1344 else
1345 buf[i] = ' ';
1346 buf[i] = '\0';
1347 pr_debug(" Revision: %s\n", buf);
1348
1349 device_type = dev->transport->get_device_type(dev);
1350 pr_debug(" Type: %s ", scsi_device_type(device_type));
1351 }
1352
1353 struct se_device *target_alloc_device(struct se_hba *hba, const char *name)
1354 {
1355 struct se_device *dev;
1356
1357 dev = hba->transport->alloc_device(hba, name);
1358 if (!dev)
1359 return NULL;
1360
1361 dev->dev_link_magic = SE_DEV_LINK_MAGIC;
1362 dev->se_hba = hba;
1363 dev->transport = hba->transport;
1364
1365 INIT_LIST_HEAD(&dev->dev_list);
1366 INIT_LIST_HEAD(&dev->dev_sep_list);
1367 INIT_LIST_HEAD(&dev->dev_tmr_list);
1368 INIT_LIST_HEAD(&dev->delayed_cmd_list);
1369 INIT_LIST_HEAD(&dev->state_list);
1370 INIT_LIST_HEAD(&dev->qf_cmd_list);
1371 spin_lock_init(&dev->stats_lock);
1372 spin_lock_init(&dev->execute_task_lock);
1373 spin_lock_init(&dev->delayed_cmd_lock);
1374 spin_lock_init(&dev->dev_reservation_lock);
1375 spin_lock_init(&dev->se_port_lock);
1376 spin_lock_init(&dev->se_tmr_lock);
1377 spin_lock_init(&dev->qf_cmd_lock);
1378 atomic_set(&dev->dev_ordered_id, 0);
1379 INIT_LIST_HEAD(&dev->t10_wwn.t10_vpd_list);
1380 spin_lock_init(&dev->t10_wwn.t10_vpd_lock);
1381 INIT_LIST_HEAD(&dev->t10_pr.registration_list);
1382 INIT_LIST_HEAD(&dev->t10_pr.aptpl_reg_list);
1383 spin_lock_init(&dev->t10_pr.registration_lock);
1384 spin_lock_init(&dev->t10_pr.aptpl_reg_lock);
1385 INIT_LIST_HEAD(&dev->t10_alua.tg_pt_gps_list);
1386 spin_lock_init(&dev->t10_alua.tg_pt_gps_lock);
1387
1388 dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1389 dev->t10_wwn.t10_dev = dev;
1390 dev->t10_alua.t10_dev = dev;
1391
1392 dev->dev_attrib.da_dev = dev;
1393 dev->dev_attrib.emulate_dpo = DA_EMULATE_DPO;
1394 dev->dev_attrib.emulate_fua_write = DA_EMULATE_FUA_WRITE;
1395 dev->dev_attrib.emulate_fua_read = DA_EMULATE_FUA_READ;
1396 dev->dev_attrib.emulate_write_cache = DA_EMULATE_WRITE_CACHE;
1397 dev->dev_attrib.emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
1398 dev->dev_attrib.emulate_tas = DA_EMULATE_TAS;
1399 dev->dev_attrib.emulate_tpu = DA_EMULATE_TPU;
1400 dev->dev_attrib.emulate_tpws = DA_EMULATE_TPWS;
1401 dev->dev_attrib.enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
1402 dev->dev_attrib.is_nonrot = DA_IS_NONROT;
1403 dev->dev_attrib.emulate_rest_reord = DA_EMULATE_REST_REORD;
1404 dev->dev_attrib.max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
1405 dev->dev_attrib.max_unmap_block_desc_count =
1406 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
1407 dev->dev_attrib.unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
1408 dev->dev_attrib.unmap_granularity_alignment =
1409 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
1410 dev->dev_attrib.max_write_same_len = DA_MAX_WRITE_SAME_LEN;
1411 dev->dev_attrib.fabric_max_sectors = DA_FABRIC_MAX_SECTORS;
1412 dev->dev_attrib.optimal_sectors = DA_FABRIC_MAX_SECTORS;
1413
1414 return dev;
1415 }
1416
1417 int target_configure_device(struct se_device *dev)
1418 {
1419 struct se_hba *hba = dev->se_hba;
1420 int ret;
1421
1422 if (dev->dev_flags & DF_CONFIGURED) {
1423 pr_err("se_dev->se_dev_ptr already set for storage"
1424 " object\n");
1425 return -EEXIST;
1426 }
1427
1428 ret = dev->transport->configure_device(dev);
1429 if (ret)
1430 goto out;
1431 dev->dev_flags |= DF_CONFIGURED;
1432
1433 /*
1434 * XXX: there is not much point to have two different values here..
1435 */
1436 dev->dev_attrib.block_size = dev->dev_attrib.hw_block_size;
1437 dev->dev_attrib.queue_depth = dev->dev_attrib.hw_queue_depth;
1438
1439 /*
1440 * Align max_hw_sectors down to PAGE_SIZE I/O transfers
1441 */
1442 dev->dev_attrib.hw_max_sectors =
1443 se_dev_align_max_sectors(dev->dev_attrib.hw_max_sectors,
1444 dev->dev_attrib.hw_block_size);
1445
1446 dev->dev_index = scsi_get_new_index(SCSI_DEVICE_INDEX);
1447 dev->creation_time = get_jiffies_64();
1448
1449 ret = core_setup_alua(dev);
1450 if (ret)
1451 goto out;
1452
1453 /*
1454 * Startup the struct se_device processing thread
1455 */
1456 dev->tmr_wq = alloc_workqueue("tmr-%s", WQ_MEM_RECLAIM | WQ_UNBOUND, 1,
1457 dev->transport->name);
1458 if (!dev->tmr_wq) {
1459 pr_err("Unable to create tmr workqueue for %s\n",
1460 dev->transport->name);
1461 ret = -ENOMEM;
1462 goto out_free_alua;
1463 }
1464
1465 /*
1466 * Setup work_queue for QUEUE_FULL
1467 */
1468 INIT_WORK(&dev->qf_work_queue, target_qf_do_work);
1469
1470 /*
1471 * Preload the initial INQUIRY const values if we are doing
1472 * anything virtual (IBLOCK, FILEIO, RAMDISK), but not for TCM/pSCSI
1473 * passthrough because this is being provided by the backend LLD.
1474 */
1475 if (dev->transport->transport_type != TRANSPORT_PLUGIN_PHBA_PDEV) {
1476 strncpy(&dev->t10_wwn.vendor[0], "LIO-ORG", 8);
1477 strncpy(&dev->t10_wwn.model[0],
1478 dev->transport->inquiry_prod, 16);
1479 strncpy(&dev->t10_wwn.revision[0],
1480 dev->transport->inquiry_rev, 4);
1481 }
1482
1483 scsi_dump_inquiry(dev);
1484
1485 spin_lock(&hba->device_lock);
1486 hba->dev_count++;
1487 spin_unlock(&hba->device_lock);
1488 return 0;
1489
1490 out_free_alua:
1491 core_alua_free_lu_gp_mem(dev);
1492 out:
1493 se_release_vpd_for_dev(dev);
1494 return ret;
1495 }
1496
1497 void target_free_device(struct se_device *dev)
1498 {
1499 struct se_hba *hba = dev->se_hba;
1500
1501 WARN_ON(!list_empty(&dev->dev_sep_list));
1502
1503 if (dev->dev_flags & DF_CONFIGURED) {
1504 destroy_workqueue(dev->tmr_wq);
1505
1506 spin_lock(&hba->device_lock);
1507 hba->dev_count--;
1508 spin_unlock(&hba->device_lock);
1509 }
1510
1511 core_alua_free_lu_gp_mem(dev);
1512 core_scsi3_free_all_registrations(dev);
1513 se_release_vpd_for_dev(dev);
1514
1515 dev->transport->free_device(dev);
1516 }
1517
1518 int core_dev_setup_virtual_lun0(void)
1519 {
1520 struct se_hba *hba;
1521 struct se_device *dev;
1522 char buf[16];
1523 int ret;
1524
1525 hba = core_alloc_hba("rd_mcp", 0, HBA_FLAGS_INTERNAL_USE);
1526 if (IS_ERR(hba))
1527 return PTR_ERR(hba);
1528
1529 dev = target_alloc_device(hba, "virt_lun0");
1530 if (!dev) {
1531 ret = -ENOMEM;
1532 goto out_free_hba;
1533 }
1534
1535 memset(buf, 0, 16);
1536 sprintf(buf, "rd_pages=8");
1537 hba->transport->set_configfs_dev_params(dev, buf, sizeof(buf));
1538
1539 ret = target_configure_device(dev);
1540 if (ret)
1541 goto out_free_se_dev;
1542
1543 lun0_hba = hba;
1544 g_lun0_dev = dev;
1545 return 0;
1546
1547 out_free_se_dev:
1548 target_free_device(dev);
1549 out_free_hba:
1550 core_delete_hba(hba);
1551 return ret;
1552 }
1553
1554
1555 void core_dev_release_virtual_lun0(void)
1556 {
1557 struct se_hba *hba = lun0_hba;
1558
1559 if (!hba)
1560 return;
1561
1562 if (g_lun0_dev)
1563 target_free_device(g_lun0_dev);
1564 core_delete_hba(hba);
1565 }
Linus' kernel tree