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Merge branch 'topic/misc' into for-linus
[deliverable/linux.git] / drivers / target / target_core_device.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_device.c (based on iscsi_target_device.c)
3 *
4 * This file contains the iSCSI Virtual Device and Disk Transport
5 * agnostic related functions.
6 *
7 * Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
8 * Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
9 * Copyright (c) 2007-2010 Rising Tide Systems
10 * Copyright (c) 2008-2010 Linux-iSCSI.org
11 *
12 * Nicholas A. Bellinger <nab@kernel.org>
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
27 *
28 ******************************************************************************/
29
30#include <linux/net.h>
31#include <linux/string.h>
32#include <linux/delay.h>
33#include <linux/timer.h>
34#include <linux/slab.h>
35#include <linux/spinlock.h>
36#include <linux/smp_lock.h>
37#include <linux/kthread.h>
38#include <linux/in.h>
39#include <net/sock.h>
40#include <net/tcp.h>
41#include <scsi/scsi.h>
42
43#include <target/target_core_base.h>
44#include <target/target_core_device.h>
45#include <target/target_core_tpg.h>
46#include <target/target_core_transport.h>
47#include <target/target_core_fabric_ops.h>
48
49#include "target_core_alua.h"
50#include "target_core_hba.h"
51#include "target_core_pr.h"
52#include "target_core_ua.h"
53
54static void se_dev_start(struct se_device *dev);
55static void se_dev_stop(struct se_device *dev);
56
57int transport_get_lun_for_cmd(
58 struct se_cmd *se_cmd,
59 unsigned char *cdb,
60 u32 unpacked_lun)
61{
62 struct se_dev_entry *deve;
63 struct se_lun *se_lun = NULL;
64 struct se_session *se_sess = SE_SESS(se_cmd);
65 unsigned long flags;
66 int read_only = 0;
67
68 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
69 deve = se_cmd->se_deve =
70 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
71 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
72 if (se_cmd) {
73 deve->total_cmds++;
74 deve->total_bytes += se_cmd->data_length;
75
76 if (se_cmd->data_direction == DMA_TO_DEVICE) {
77 if (deve->lun_flags &
78 TRANSPORT_LUNFLAGS_READ_ONLY) {
79 read_only = 1;
80 goto out;
81 }
82 deve->write_bytes += se_cmd->data_length;
83 } else if (se_cmd->data_direction ==
84 DMA_FROM_DEVICE) {
85 deve->read_bytes += se_cmd->data_length;
86 }
87 }
88 deve->deve_cmds++;
89
90 se_lun = se_cmd->se_lun = deve->se_lun;
91 se_cmd->pr_res_key = deve->pr_res_key;
92 se_cmd->orig_fe_lun = unpacked_lun;
93 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
94 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
95 }
96out:
97 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
98
99 if (!se_lun) {
100 if (read_only) {
101 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
102 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
103 printk("TARGET_CORE[%s]: Detected WRITE_PROTECTED LUN"
104 " Access for 0x%08x\n",
105 CMD_TFO(se_cmd)->get_fabric_name(),
106 unpacked_lun);
107 return -1;
108 } else {
109 /*
110 * Use the se_portal_group->tpg_virt_lun0 to allow for
111 * REPORT_LUNS, et al to be returned when no active
112 * MappedLUN=0 exists for this Initiator Port.
113 */
114 if (unpacked_lun != 0) {
115 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
116 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
117 printk("TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
118 " Access for 0x%08x\n",
119 CMD_TFO(se_cmd)->get_fabric_name(),
120 unpacked_lun);
121 return -1;
122 }
123 /*
124 * Force WRITE PROTECT for virtual LUN 0
125 */
126 if ((se_cmd->data_direction != DMA_FROM_DEVICE) &&
127 (se_cmd->data_direction != DMA_NONE)) {
128 se_cmd->scsi_sense_reason = TCM_WRITE_PROTECTED;
129 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
130 return -1;
131 }
132#if 0
133 printk("TARGET_CORE[%s]: Using virtual LUN0! :-)\n",
134 CMD_TFO(se_cmd)->get_fabric_name());
135#endif
136 se_lun = se_cmd->se_lun = &se_sess->se_tpg->tpg_virt_lun0;
137 se_cmd->orig_fe_lun = 0;
138 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
139 se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD;
140 }
141 }
142 /*
143 * Determine if the struct se_lun is online.
144 */
145/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
146 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
147 se_cmd->scsi_sense_reason = TCM_NON_EXISTENT_LUN;
148 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
149 return -1;
150 }
151
152 {
153 struct se_device *dev = se_lun->lun_se_dev;
154 spin_lock(&dev->stats_lock);
155 dev->num_cmds++;
156 if (se_cmd->data_direction == DMA_TO_DEVICE)
157 dev->write_bytes += se_cmd->data_length;
158 else if (se_cmd->data_direction == DMA_FROM_DEVICE)
159 dev->read_bytes += se_cmd->data_length;
160 spin_unlock(&dev->stats_lock);
161 }
162
163 /*
164 * Add the iscsi_cmd_t to the struct se_lun's cmd list. This list is used
165 * for tracking state of struct se_cmds during LUN shutdown events.
166 */
167 spin_lock_irqsave(&se_lun->lun_cmd_lock, flags);
168 list_add_tail(&se_cmd->se_lun_list, &se_lun->lun_cmd_list);
169 atomic_set(&T_TASK(se_cmd)->transport_lun_active, 1);
170#if 0
171 printk(KERN_INFO "Adding ITT: 0x%08x to LUN LIST[%d]\n",
172 CMD_TFO(se_cmd)->get_task_tag(se_cmd), se_lun->unpacked_lun);
173#endif
174 spin_unlock_irqrestore(&se_lun->lun_cmd_lock, flags);
175
176 return 0;
177}
178EXPORT_SYMBOL(transport_get_lun_for_cmd);
179
180int transport_get_lun_for_tmr(
181 struct se_cmd *se_cmd,
182 u32 unpacked_lun)
183{
184 struct se_device *dev = NULL;
185 struct se_dev_entry *deve;
186 struct se_lun *se_lun = NULL;
187 struct se_session *se_sess = SE_SESS(se_cmd);
188 struct se_tmr_req *se_tmr = se_cmd->se_tmr_req;
189
190 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
191 deve = se_cmd->se_deve =
192 &SE_NODE_ACL(se_sess)->device_list[unpacked_lun];
193 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
194 se_lun = se_cmd->se_lun = se_tmr->tmr_lun = deve->se_lun;
195 dev = se_tmr->tmr_dev = se_lun->lun_se_dev;
196 se_cmd->pr_res_key = deve->pr_res_key;
197 se_cmd->orig_fe_lun = unpacked_lun;
198 se_cmd->se_orig_obj_ptr = SE_LUN(se_cmd)->lun_se_dev;
199/* se_cmd->se_cmd_flags |= SCF_SE_LUN_CMD; */
200 }
201 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
202
203 if (!se_lun) {
204 printk(KERN_INFO "TARGET_CORE[%s]: Detected NON_EXISTENT_LUN"
205 " Access for 0x%08x\n",
206 CMD_TFO(se_cmd)->get_fabric_name(),
207 unpacked_lun);
208 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
209 return -1;
210 }
211 /*
212 * Determine if the struct se_lun is online.
213 */
214/* #warning FIXME: Check for LUN_RESET + UNIT Attention */
215 if (se_dev_check_online(se_lun->lun_se_dev) != 0) {
216 se_cmd->se_cmd_flags |= SCF_SCSI_CDB_EXCEPTION;
217 return -1;
218 }
219
220 spin_lock(&dev->se_tmr_lock);
221 list_add_tail(&se_tmr->tmr_list, &dev->dev_tmr_list);
222 spin_unlock(&dev->se_tmr_lock);
223
224 return 0;
225}
226EXPORT_SYMBOL(transport_get_lun_for_tmr);
227
228/*
229 * This function is called from core_scsi3_emulate_pro_register_and_move()
230 * and core_scsi3_decode_spec_i_port(), and will increment &deve->pr_ref_count
231 * when a matching rtpi is found.
232 */
233struct se_dev_entry *core_get_se_deve_from_rtpi(
234 struct se_node_acl *nacl,
235 u16 rtpi)
236{
237 struct se_dev_entry *deve;
238 struct se_lun *lun;
239 struct se_port *port;
240 struct se_portal_group *tpg = nacl->se_tpg;
241 u32 i;
242
243 spin_lock_irq(&nacl->device_list_lock);
244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
245 deve = &nacl->device_list[i];
246
247 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
248 continue;
249
250 lun = deve->se_lun;
251 if (!(lun)) {
252 printk(KERN_ERR "%s device entries device pointer is"
253 " NULL, but Initiator has access.\n",
254 TPG_TFO(tpg)->get_fabric_name());
255 continue;
256 }
257 port = lun->lun_sep;
258 if (!(port)) {
259 printk(KERN_ERR "%s device entries device pointer is"
260 " NULL, but Initiator has access.\n",
261 TPG_TFO(tpg)->get_fabric_name());
262 continue;
263 }
264 if (port->sep_rtpi != rtpi)
265 continue;
266
267 atomic_inc(&deve->pr_ref_count);
268 smp_mb__after_atomic_inc();
269 spin_unlock_irq(&nacl->device_list_lock);
270
271 return deve;
272 }
273 spin_unlock_irq(&nacl->device_list_lock);
274
275 return NULL;
276}
277
278int core_free_device_list_for_node(
279 struct se_node_acl *nacl,
280 struct se_portal_group *tpg)
281{
282 struct se_dev_entry *deve;
283 struct se_lun *lun;
284 u32 i;
285
286 if (!nacl->device_list)
287 return 0;
288
289 spin_lock_irq(&nacl->device_list_lock);
290 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
291 deve = &nacl->device_list[i];
292
293 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
294 continue;
295
296 if (!deve->se_lun) {
297 printk(KERN_ERR "%s device entries device pointer is"
298 " NULL, but Initiator has access.\n",
299 TPG_TFO(tpg)->get_fabric_name());
300 continue;
301 }
302 lun = deve->se_lun;
303
304 spin_unlock_irq(&nacl->device_list_lock);
305 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
306 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
307 spin_lock_irq(&nacl->device_list_lock);
308 }
309 spin_unlock_irq(&nacl->device_list_lock);
310
311 kfree(nacl->device_list);
312 nacl->device_list = NULL;
313
314 return 0;
315}
316
317void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
318{
319 struct se_dev_entry *deve;
320
321 spin_lock_irq(&se_nacl->device_list_lock);
322 deve = &se_nacl->device_list[se_cmd->orig_fe_lun];
323 deve->deve_cmds--;
324 spin_unlock_irq(&se_nacl->device_list_lock);
325
326 return;
327}
328
329void core_update_device_list_access(
330 u32 mapped_lun,
331 u32 lun_access,
332 struct se_node_acl *nacl)
333{
334 struct se_dev_entry *deve;
335
336 spin_lock_irq(&nacl->device_list_lock);
337 deve = &nacl->device_list[mapped_lun];
338 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
339 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
340 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
341 } else {
342 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
343 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
344 }
345 spin_unlock_irq(&nacl->device_list_lock);
346
347 return;
348}
349
350/* core_update_device_list_for_node():
351 *
352 *
353 */
354int core_update_device_list_for_node(
355 struct se_lun *lun,
356 struct se_lun_acl *lun_acl,
357 u32 mapped_lun,
358 u32 lun_access,
359 struct se_node_acl *nacl,
360 struct se_portal_group *tpg,
361 int enable)
362{
363 struct se_port *port = lun->lun_sep;
364 struct se_dev_entry *deve = &nacl->device_list[mapped_lun];
365 int trans = 0;
366 /*
367 * If the MappedLUN entry is being disabled, the entry in
368 * port->sep_alua_list must be removed now before clearing the
369 * struct se_dev_entry pointers below as logic in
370 * core_alua_do_transition_tg_pt() depends on these being present.
371 */
372 if (!(enable)) {
373 /*
374 * deve->se_lun_acl will be NULL for demo-mode created LUNs
375 * that have not been explictly concerted to MappedLUNs ->
29fe609d
NB		 376 * struct se_lun_acl, but we remove deve->alua_port_list from
377 * port->sep_alua_list. This also means that active UAs and
378 * NodeACL context specific PR metadata for demo-mode
379 * MappedLUN *deve will be released below..
c66ac9db 380 */
c66ac9db
NB		 381 spin_lock_bh(&port->sep_alua_lock);
382 list_del(&deve->alua_port_list);
383 spin_unlock_bh(&port->sep_alua_lock);
384 }
385
386 spin_lock_irq(&nacl->device_list_lock);
387 if (enable) {
388 /*
389 * Check if the call is handling demo mode -> explict LUN ACL
390 * transition. This transition must be for the same struct se_lun
391 * + mapped_lun that was setup in demo mode..
392 */
393 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS) {
394 if (deve->se_lun_acl != NULL) {
395 printk(KERN_ERR "struct se_dev_entry->se_lun_acl"
396 " already set for demo mode -> explict"
397 " LUN ACL transition\n");
85dc98d9 398 spin_unlock_irq(&nacl->device_list_lock);
c66ac9db
NB		 399 return -1;
400 }
401 if (deve->se_lun != lun) {
402 printk(KERN_ERR "struct se_dev_entry->se_lun does"
403 " match passed struct se_lun for demo mode"
404 " -> explict LUN ACL transition\n");
85dc98d9 405 spin_unlock_irq(&nacl->device_list_lock);
c66ac9db
NB		 406 return -1;
407 }
408 deve->se_lun_acl = lun_acl;
409 trans = 1;
410 } else {
411 deve->se_lun = lun;
412 deve->se_lun_acl = lun_acl;
413 deve->mapped_lun = mapped_lun;
414 deve->lun_flags |= TRANSPORT_LUNFLAGS_INITIATOR_ACCESS;
415 }
416
417 if (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) {
418 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_ONLY;
419 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_WRITE;
420 } else {
421 deve->lun_flags &= ~TRANSPORT_LUNFLAGS_READ_WRITE;
422 deve->lun_flags |= TRANSPORT_LUNFLAGS_READ_ONLY;
423 }
424
425 if (trans) {
426 spin_unlock_irq(&nacl->device_list_lock);
427 return 0;
428 }
429 deve->creation_time = get_jiffies_64();
430 deve->attach_count++;
431 spin_unlock_irq(&nacl->device_list_lock);
432
433 spin_lock_bh(&port->sep_alua_lock);
434 list_add_tail(&deve->alua_port_list, &port->sep_alua_list);
435 spin_unlock_bh(&port->sep_alua_lock);
436
437 return 0;
438 }
439 /*
440 * Wait for any in process SPEC_I_PT=1 or REGISTER_AND_MOVE
441 * PR operation to complete.
442 */
443 spin_unlock_irq(&nacl->device_list_lock);
444 while (atomic_read(&deve->pr_ref_count) != 0)
445 cpu_relax();
446 spin_lock_irq(&nacl->device_list_lock);
447 /*
448 * Disable struct se_dev_entry LUN ACL mapping
449 */
450 core_scsi3_ua_release_all(deve);
451 deve->se_lun = NULL;
452 deve->se_lun_acl = NULL;
453 deve->lun_flags = 0;
454 deve->creation_time = 0;
455 deve->attach_count--;
456 spin_unlock_irq(&nacl->device_list_lock);
457
458 core_scsi3_free_pr_reg_from_nacl(lun->lun_se_dev, nacl);
459 return 0;
460}
461
462/* core_clear_lun_from_tpg():
463 *
464 *
465 */
466void core_clear_lun_from_tpg(struct se_lun *lun, struct se_portal_group *tpg)
467{
468 struct se_node_acl *nacl;
469 struct se_dev_entry *deve;
470 u32 i;
471
472 spin_lock_bh(&tpg->acl_node_lock);
473 list_for_each_entry(nacl, &tpg->acl_node_list, acl_list) {
474 spin_unlock_bh(&tpg->acl_node_lock);
475
476 spin_lock_irq(&nacl->device_list_lock);
477 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
478 deve = &nacl->device_list[i];
479 if (lun != deve->se_lun)
480 continue;
481 spin_unlock_irq(&nacl->device_list_lock);
482
483 core_update_device_list_for_node(lun, NULL,
484 deve->mapped_lun, TRANSPORT_LUNFLAGS_NO_ACCESS,
485 nacl, tpg, 0);
486
487 spin_lock_irq(&nacl->device_list_lock);
488 }
489 spin_unlock_irq(&nacl->device_list_lock);
490
491 spin_lock_bh(&tpg->acl_node_lock);
492 }
493 spin_unlock_bh(&tpg->acl_node_lock);
494
495 return;
496}
497
498static struct se_port *core_alloc_port(struct se_device *dev)
499{
500 struct se_port *port, *port_tmp;
501
502 port = kzalloc(sizeof(struct se_port), GFP_KERNEL);
503 if (!(port)) {
504 printk(KERN_ERR "Unable to allocate struct se_port\n");
505 return NULL;
506 }
507 INIT_LIST_HEAD(&port->sep_alua_list);
508 INIT_LIST_HEAD(&port->sep_list);
509 atomic_set(&port->sep_tg_pt_secondary_offline, 0);
510 spin_lock_init(&port->sep_alua_lock);
511 mutex_init(&port->sep_tg_pt_md_mutex);
512
513 spin_lock(&dev->se_port_lock);
514 if (dev->dev_port_count == 0x0000ffff) {
515 printk(KERN_WARNING "Reached dev->dev_port_count =="
516 " 0x0000ffff\n");
517 spin_unlock(&dev->se_port_lock);
518 return NULL;
519 }
520again:
521 /*
522 * Allocate the next RELATIVE TARGET PORT IDENTIFER for this struct se_device
523 * Here is the table from spc4r17 section 7.7.3.8.
524 *
525 * Table 473 -- RELATIVE TARGET PORT IDENTIFIER field
526 *
527 * Code Description
528 * 0h Reserved
529 * 1h Relative port 1, historically known as port A
530 * 2h Relative port 2, historically known as port B
531 * 3h to FFFFh Relative port 3 through 65 535
532 */
533 port->sep_rtpi = dev->dev_rpti_counter++;
534 if (!(port->sep_rtpi))
535 goto again;
536
537 list_for_each_entry(port_tmp, &dev->dev_sep_list, sep_list) {
538 /*
539 * Make sure RELATIVE TARGET PORT IDENTIFER is unique
540 * for 16-bit wrap..
541 */
542 if (port->sep_rtpi == port_tmp->sep_rtpi)
543 goto again;
544 }
545 spin_unlock(&dev->se_port_lock);
546
547 return port;
548}
549
550static void core_export_port(
551 struct se_device *dev,
552 struct se_portal_group *tpg,
553 struct se_port *port,
554 struct se_lun *lun)
555{
556 struct se_subsystem_dev *su_dev = SU_DEV(dev);
557 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem = NULL;
558
559 spin_lock(&dev->se_port_lock);
560 spin_lock(&lun->lun_sep_lock);
561 port->sep_tpg = tpg;
562 port->sep_lun = lun;
563 lun->lun_sep = port;
564 spin_unlock(&lun->lun_sep_lock);
565
566 list_add_tail(&port->sep_list, &dev->dev_sep_list);
567 spin_unlock(&dev->se_port_lock);
568
569 if (T10_ALUA(su_dev)->alua_type == SPC3_ALUA_EMULATED) {
570 tg_pt_gp_mem = core_alua_allocate_tg_pt_gp_mem(port);
571 if (IS_ERR(tg_pt_gp_mem) || !tg_pt_gp_mem) {
572 printk(KERN_ERR "Unable to allocate t10_alua_tg_pt"
573 "_gp_member_t\n");
574 return;
575 }
576 spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
577 __core_alua_attach_tg_pt_gp_mem(tg_pt_gp_mem,
578 T10_ALUA(su_dev)->default_tg_pt_gp);
579 spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock);
580 printk(KERN_INFO "%s/%s: Adding to default ALUA Target Port"
581 " Group: alua/default_tg_pt_gp\n",
582 TRANSPORT(dev)->name, TPG_TFO(tpg)->get_fabric_name());
583 }
584
585 dev->dev_port_count++;
586 port->sep_index = port->sep_rtpi; /* RELATIVE TARGET PORT IDENTIFER */
587}
588
589/*
590 * Called with struct se_device->se_port_lock spinlock held.
591 */
592static void core_release_port(struct se_device *dev, struct se_port *port)
593{
594 /*
595 * Wait for any port reference for PR ALL_TG_PT=1 operation
596 * to complete in __core_scsi3_alloc_registration()
597 */
598 spin_unlock(&dev->se_port_lock);
599 if (atomic_read(&port->sep_tg_pt_ref_cnt))
600 cpu_relax();
601 spin_lock(&dev->se_port_lock);
602
603 core_alua_free_tg_pt_gp_mem(port);
604
605 list_del(&port->sep_list);
606 dev->dev_port_count--;
607 kfree(port);
608
609 return;
610}
611
612int core_dev_export(
613 struct se_device *dev,
614 struct se_portal_group *tpg,
615 struct se_lun *lun)
616{
617 struct se_port *port;
618
619 port = core_alloc_port(dev);
620 if (!(port))
621 return -1;
622
623 lun->lun_se_dev = dev;
624 se_dev_start(dev);
625
626 atomic_inc(&dev->dev_export_obj.obj_access_count);
627 core_export_port(dev, tpg, port, lun);
628 return 0;
629}
630
631void core_dev_unexport(
632 struct se_device *dev,
633 struct se_portal_group *tpg,
634 struct se_lun *lun)
635{
636 struct se_port *port = lun->lun_sep;
637
638 spin_lock(&lun->lun_sep_lock);
639 if (lun->lun_se_dev == NULL) {
640 spin_unlock(&lun->lun_sep_lock);
641 return;
642 }
643 spin_unlock(&lun->lun_sep_lock);
644
645 spin_lock(&dev->se_port_lock);
646 atomic_dec(&dev->dev_export_obj.obj_access_count);
647 core_release_port(dev, port);
648 spin_unlock(&dev->se_port_lock);
649
650 se_dev_stop(dev);
651 lun->lun_se_dev = NULL;
652}
653
654int transport_core_report_lun_response(struct se_cmd *se_cmd)
655{
656 struct se_dev_entry *deve;
657 struct se_lun *se_lun;
658 struct se_session *se_sess = SE_SESS(se_cmd);
659 struct se_task *se_task;
660 unsigned char *buf = (unsigned char *)T_TASK(se_cmd)->t_task_buf;
661 u32 cdb_offset = 0, lun_count = 0, offset = 8;
662 u64 i, lun;
663
664 list_for_each_entry(se_task, &T_TASK(se_cmd)->t_task_list, t_list)
665 break;
666
667 if (!(se_task)) {
668 printk(KERN_ERR "Unable to locate struct se_task for struct se_cmd\n");
669 return PYX_TRANSPORT_LU_COMM_FAILURE;
670 }
671
672 /*
673 * If no struct se_session pointer is present, this struct se_cmd is
674 * coming via a target_core_mod PASSTHROUGH op, and not through
675 * a $FABRIC_MOD. In that case, report LUN=0 only.
676 */
677 if (!(se_sess)) {
678 lun = 0;
679 buf[offset++] = ((lun >> 56) & 0xff);
680 buf[offset++] = ((lun >> 48) & 0xff);
681 buf[offset++] = ((lun >> 40) & 0xff);
682 buf[offset++] = ((lun >> 32) & 0xff);
683 buf[offset++] = ((lun >> 24) & 0xff);
684 buf[offset++] = ((lun >> 16) & 0xff);
685 buf[offset++] = ((lun >> 8) & 0xff);
686 buf[offset++] = (lun & 0xff);
687 lun_count = 1;
688 goto done;
689 }
690
691 spin_lock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
692 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
693 deve = &SE_NODE_ACL(se_sess)->device_list[i];
694 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
695 continue;
696 se_lun = deve->se_lun;
697 /*
698 * We determine the correct LUN LIST LENGTH even once we
699 * have reached the initial allocation length.
700 * See SPC2-R20 7.19.
701 */
702 lun_count++;
703 if ((cdb_offset + 8) >= se_cmd->data_length)
704 continue;
705
706 lun = cpu_to_be64(CMD_TFO(se_cmd)->pack_lun(deve->mapped_lun));
707 buf[offset++] = ((lun >> 56) & 0xff);
708 buf[offset++] = ((lun >> 48) & 0xff);
709 buf[offset++] = ((lun >> 40) & 0xff);
710 buf[offset++] = ((lun >> 32) & 0xff);
711 buf[offset++] = ((lun >> 24) & 0xff);
712 buf[offset++] = ((lun >> 16) & 0xff);
713 buf[offset++] = ((lun >> 8) & 0xff);
714 buf[offset++] = (lun & 0xff);
715 cdb_offset += 8;
716 }
717 spin_unlock_irq(&SE_NODE_ACL(se_sess)->device_list_lock);
718
719 /*
720 * See SPC3 r07, page 159.
721 */
722done:
723 lun_count *= 8;
724 buf[0] = ((lun_count >> 24) & 0xff);
725 buf[1] = ((lun_count >> 16) & 0xff);
726 buf[2] = ((lun_count >> 8) & 0xff);
727 buf[3] = (lun_count & 0xff);
728
729 return PYX_TRANSPORT_SENT_TO_TRANSPORT;
730}
731
732/* se_release_device_for_hba():
733 *
734 *
735 */
736void se_release_device_for_hba(struct se_device *dev)
737{
738 struct se_hba *hba = dev->se_hba;
739
740 if ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
741 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) ||
742 (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN) ||
743 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_ACTIVATED) ||
744 (dev->dev_status & TRANSPORT_DEVICE_OFFLINE_DEACTIVATED))
745 se_dev_stop(dev);
746
747 if (dev->dev_ptr) {
748 kthread_stop(dev->process_thread);
749 if (dev->transport->free_device)
750 dev->transport->free_device(dev->dev_ptr);
751 }
752
753 spin_lock(&hba->device_lock);
754 list_del(&dev->dev_list);
755 hba->dev_count--;
756 spin_unlock(&hba->device_lock);
757
758 core_scsi3_free_all_registrations(dev);
759 se_release_vpd_for_dev(dev);
760
761 kfree(dev->dev_status_queue_obj);
762 kfree(dev->dev_queue_obj);
763 kfree(dev);
764
765 return;
766}
767
768void se_release_vpd_for_dev(struct se_device *dev)
769{
770 struct t10_vpd *vpd, *vpd_tmp;
771
772 spin_lock(&DEV_T10_WWN(dev)->t10_vpd_lock);
773 list_for_each_entry_safe(vpd, vpd_tmp,
774 &DEV_T10_WWN(dev)->t10_vpd_list, vpd_list) {
775 list_del(&vpd->vpd_list);
776 kfree(vpd);
777 }
778 spin_unlock(&DEV_T10_WWN(dev)->t10_vpd_lock);
779
780 return;
781}
782
783/*
784 * Called with struct se_hba->device_lock held.
785 */
786void se_clear_dev_ports(struct se_device *dev)
787{
788 struct se_hba *hba = dev->se_hba;
789 struct se_lun *lun;
790 struct se_portal_group *tpg;
791 struct se_port *sep, *sep_tmp;
792
793 spin_lock(&dev->se_port_lock);
794 list_for_each_entry_safe(sep, sep_tmp, &dev->dev_sep_list, sep_list) {
795 spin_unlock(&dev->se_port_lock);
796 spin_unlock(&hba->device_lock);
797
798 lun = sep->sep_lun;
799 tpg = sep->sep_tpg;
800 spin_lock(&lun->lun_sep_lock);
801 if (lun->lun_se_dev == NULL) {
802 spin_unlock(&lun->lun_sep_lock);
803 continue;
804 }
805 spin_unlock(&lun->lun_sep_lock);
806
807 core_dev_del_lun(tpg, lun->unpacked_lun);
808
809 spin_lock(&hba->device_lock);
810 spin_lock(&dev->se_port_lock);
811 }
812 spin_unlock(&dev->se_port_lock);
813
814 return;
815}
816
817/* se_free_virtual_device():
818 *
819 * Used for IBLOCK, RAMDISK, and FILEIO Transport Drivers.
820 */
821int se_free_virtual_device(struct se_device *dev, struct se_hba *hba)
822{
823 spin_lock(&hba->device_lock);
824 se_clear_dev_ports(dev);
825 spin_unlock(&hba->device_lock);
826
827 core_alua_free_lu_gp_mem(dev);
828 se_release_device_for_hba(dev);
829
830 return 0;
831}
832
833static void se_dev_start(struct se_device *dev)
834{
835 struct se_hba *hba = dev->se_hba;
836
837 spin_lock(&hba->device_lock);
838 atomic_inc(&dev->dev_obj.obj_access_count);
839 if (atomic_read(&dev->dev_obj.obj_access_count) == 1) {
840 if (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED) {
841 dev->dev_status &= ~TRANSPORT_DEVICE_DEACTIVATED;
842 dev->dev_status |= TRANSPORT_DEVICE_ACTIVATED;
843 } else if (dev->dev_status &
844 TRANSPORT_DEVICE_OFFLINE_DEACTIVATED) {
845 dev->dev_status &=
846 ~TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
847 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
848 }
849 }
850 spin_unlock(&hba->device_lock);
851}
852
853static void se_dev_stop(struct se_device *dev)
854{
855 struct se_hba *hba = dev->se_hba;
856
857 spin_lock(&hba->device_lock);
858 atomic_dec(&dev->dev_obj.obj_access_count);
859 if (atomic_read(&dev->dev_obj.obj_access_count) == 0) {
860 if (dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) {
861 dev->dev_status &= ~TRANSPORT_DEVICE_ACTIVATED;
862 dev->dev_status |= TRANSPORT_DEVICE_DEACTIVATED;
863 } else if (dev->dev_status &
864 TRANSPORT_DEVICE_OFFLINE_ACTIVATED) {
865 dev->dev_status &= ~TRANSPORT_DEVICE_OFFLINE_ACTIVATED;
866 dev->dev_status |= TRANSPORT_DEVICE_OFFLINE_DEACTIVATED;
867 }
868 }
869 spin_unlock(&hba->device_lock);
c66ac9db
NB		 870}
871
872int se_dev_check_online(struct se_device *dev)
873{
874 int ret;
875
876 spin_lock_irq(&dev->dev_status_lock);
877 ret = ((dev->dev_status & TRANSPORT_DEVICE_ACTIVATED) ||
878 (dev->dev_status & TRANSPORT_DEVICE_DEACTIVATED)) ? 0 : 1;
879 spin_unlock_irq(&dev->dev_status_lock);
880
881 return ret;
882}
883
884int se_dev_check_shutdown(struct se_device *dev)
885{
886 int ret;
887
888 spin_lock_irq(&dev->dev_status_lock);
889 ret = (dev->dev_status & TRANSPORT_DEVICE_SHUTDOWN);
890 spin_unlock_irq(&dev->dev_status_lock);
891
892 return ret;
893}
894
895void se_dev_set_default_attribs(
896 struct se_device *dev,
897 struct se_dev_limits *dev_limits)
898{
899 struct queue_limits *limits = &dev_limits->limits;
900
901 DEV_ATTRIB(dev)->emulate_dpo = DA_EMULATE_DPO;
902 DEV_ATTRIB(dev)->emulate_fua_write = DA_EMULATE_FUA_WRITE;
903 DEV_ATTRIB(dev)->emulate_fua_read = DA_EMULATE_FUA_READ;
904 DEV_ATTRIB(dev)->emulate_write_cache = DA_EMULATE_WRITE_CACHE;
905 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = DA_EMULATE_UA_INTLLCK_CTRL;
906 DEV_ATTRIB(dev)->emulate_tas = DA_EMULATE_TAS;
907 DEV_ATTRIB(dev)->emulate_tpu = DA_EMULATE_TPU;
908 DEV_ATTRIB(dev)->emulate_tpws = DA_EMULATE_TPWS;
909 DEV_ATTRIB(dev)->emulate_reservations = DA_EMULATE_RESERVATIONS;
910 DEV_ATTRIB(dev)->emulate_alua = DA_EMULATE_ALUA;
911 DEV_ATTRIB(dev)->enforce_pr_isids = DA_ENFORCE_PR_ISIDS;
912 /*
913 * The TPU=1 and TPWS=1 settings will be set in TCM/IBLOCK
914 * iblock_create_virtdevice() from struct queue_limits values
915 * if blk_queue_discard()==1
916 */
917 DEV_ATTRIB(dev)->max_unmap_lba_count = DA_MAX_UNMAP_LBA_COUNT;
918 DEV_ATTRIB(dev)->max_unmap_block_desc_count =
919 DA_MAX_UNMAP_BLOCK_DESC_COUNT;
920 DEV_ATTRIB(dev)->unmap_granularity = DA_UNMAP_GRANULARITY_DEFAULT;
921 DEV_ATTRIB(dev)->unmap_granularity_alignment =
922 DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT;
923 /*
924 * block_size is based on subsystem plugin dependent requirements.
925 */
926 DEV_ATTRIB(dev)->hw_block_size = limits->logical_block_size;
927 DEV_ATTRIB(dev)->block_size = limits->logical_block_size;
928 /*
929 * max_sectors is based on subsystem plugin dependent requirements.
930 */
931 DEV_ATTRIB(dev)->hw_max_sectors = limits->max_hw_sectors;
932 DEV_ATTRIB(dev)->max_sectors = limits->max_sectors;
933 /*
934 * Set optimal_sectors from max_sectors, which can be lowered via
935 * configfs.
936 */
937 DEV_ATTRIB(dev)->optimal_sectors = limits->max_sectors;
938 /*
939 * queue_depth is based on subsystem plugin dependent requirements.
940 */
941 DEV_ATTRIB(dev)->hw_queue_depth = dev_limits->hw_queue_depth;
942 DEV_ATTRIB(dev)->queue_depth = dev_limits->queue_depth;
943}
944
945int se_dev_set_task_timeout(struct se_device *dev, u32 task_timeout)
946{
947 if (task_timeout > DA_TASK_TIMEOUT_MAX) {
948 printk(KERN_ERR "dev[%p]: Passed task_timeout: %u larger then"
949 " DA_TASK_TIMEOUT_MAX\n", dev, task_timeout);
950 return -1;
951 } else {
952 DEV_ATTRIB(dev)->task_timeout = task_timeout;
953 printk(KERN_INFO "dev[%p]: Set SE Device task_timeout: %u\n",
954 dev, task_timeout);
955 }
956
957 return 0;
958}
959
960int se_dev_set_max_unmap_lba_count(
961 struct se_device *dev,
962 u32 max_unmap_lba_count)
963{
964 DEV_ATTRIB(dev)->max_unmap_lba_count = max_unmap_lba_count;
965 printk(KERN_INFO "dev[%p]: Set max_unmap_lba_count: %u\n",
966 dev, DEV_ATTRIB(dev)->max_unmap_lba_count);
967 return 0;
968}
969
970int se_dev_set_max_unmap_block_desc_count(
971 struct se_device *dev,
972 u32 max_unmap_block_desc_count)
973{
974 DEV_ATTRIB(dev)->max_unmap_block_desc_count = max_unmap_block_desc_count;
975 printk(KERN_INFO "dev[%p]: Set max_unmap_block_desc_count: %u\n",
976 dev, DEV_ATTRIB(dev)->max_unmap_block_desc_count);
977 return 0;
978}
979
980int se_dev_set_unmap_granularity(
981 struct se_device *dev,
982 u32 unmap_granularity)
983{
984 DEV_ATTRIB(dev)->unmap_granularity = unmap_granularity;
985 printk(KERN_INFO "dev[%p]: Set unmap_granularity: %u\n",
986 dev, DEV_ATTRIB(dev)->unmap_granularity);
987 return 0;
988}
989
990int se_dev_set_unmap_granularity_alignment(
991 struct se_device *dev,
992 u32 unmap_granularity_alignment)
993{
994 DEV_ATTRIB(dev)->unmap_granularity_alignment = unmap_granularity_alignment;
995 printk(KERN_INFO "dev[%p]: Set unmap_granularity_alignment: %u\n",
996 dev, DEV_ATTRIB(dev)->unmap_granularity_alignment);
997 return 0;
998}
999
1000int se_dev_set_emulate_dpo(struct se_device *dev, int flag)
1001{
1002 if ((flag != 0) && (flag != 1)) {
1003 printk(KERN_ERR "Illegal value %d\n", flag);
1004 return -1;
1005 }
1006 if (TRANSPORT(dev)->dpo_emulated == NULL) {
1007 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated is NULL\n");
1008 return -1;
1009 }
1010 if (TRANSPORT(dev)->dpo_emulated(dev) == 0) {
1011 printk(KERN_ERR "TRANSPORT(dev)->dpo_emulated not supported\n");
1012 return -1;
1013 }
1014 DEV_ATTRIB(dev)->emulate_dpo = flag;
1015 printk(KERN_INFO "dev[%p]: SE Device Page Out (DPO) Emulation"
1016 " bit: %d\n", dev, DEV_ATTRIB(dev)->emulate_dpo);
1017 return 0;
1018}
1019
1020int se_dev_set_emulate_fua_write(struct se_device *dev, int flag)
1021{
1022 if ((flag != 0) && (flag != 1)) {
1023 printk(KERN_ERR "Illegal value %d\n", flag);
1024 return -1;
1025 }
1026 if (TRANSPORT(dev)->fua_write_emulated == NULL) {
1027 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated is NULL\n");
1028 return -1;
1029 }
1030 if (TRANSPORT(dev)->fua_write_emulated(dev) == 0) {
1031 printk(KERN_ERR "TRANSPORT(dev)->fua_write_emulated not supported\n");
1032 return -1;
1033 }
1034 DEV_ATTRIB(dev)->emulate_fua_write = flag;
1035 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access WRITEs: %d\n",
1036 dev, DEV_ATTRIB(dev)->emulate_fua_write);
1037 return 0;
1038}
1039
1040int se_dev_set_emulate_fua_read(struct se_device *dev, int flag)
1041{
1042 if ((flag != 0) && (flag != 1)) {
1043 printk(KERN_ERR "Illegal value %d\n", flag);
1044 return -1;
1045 }
1046 if (TRANSPORT(dev)->fua_read_emulated == NULL) {
1047 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated is NULL\n");
1048 return -1;
1049 }
1050 if (TRANSPORT(dev)->fua_read_emulated(dev) == 0) {
1051 printk(KERN_ERR "TRANSPORT(dev)->fua_read_emulated not supported\n");
1052 return -1;
1053 }
1054 DEV_ATTRIB(dev)->emulate_fua_read = flag;
1055 printk(KERN_INFO "dev[%p]: SE Device Forced Unit Access READs: %d\n",
1056 dev, DEV_ATTRIB(dev)->emulate_fua_read);
1057 return 0;
1058}
1059
1060int se_dev_set_emulate_write_cache(struct se_device *dev, int flag)
1061{
1062 if ((flag != 0) && (flag != 1)) {
1063 printk(KERN_ERR "Illegal value %d\n", flag);
1064 return -1;
1065 }
1066 if (TRANSPORT(dev)->write_cache_emulated == NULL) {
1067 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated is NULL\n");
1068 return -1;
1069 }
1070 if (TRANSPORT(dev)->write_cache_emulated(dev) == 0) {
1071 printk(KERN_ERR "TRANSPORT(dev)->write_cache_emulated not supported\n");
1072 return -1;
1073 }
1074 DEV_ATTRIB(dev)->emulate_write_cache = flag;
1075 printk(KERN_INFO "dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
1076 dev, DEV_ATTRIB(dev)->emulate_write_cache);
1077 return 0;
1078}
1079
1080int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *dev, int flag)
1081{
1082 if ((flag != 0) && (flag != 1) && (flag != 2)) {
1083 printk(KERN_ERR "Illegal value %d\n", flag);
1084 return -1;
1085 }
1086
1087 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1088 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1089 " UA_INTRLCK_CTRL while dev_export_obj: %d count"
1090 " exists\n", dev,
1091 atomic_read(&dev->dev_export_obj.obj_access_count));
1092 return -1;
1093 }
1094 DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl = flag;
1095 printk(KERN_INFO "dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
1096 dev, DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl);
1097
1098 return 0;
1099}
1100
1101int se_dev_set_emulate_tas(struct se_device *dev, int flag)
1102{
1103 if ((flag != 0) && (flag != 1)) {
1104 printk(KERN_ERR "Illegal value %d\n", flag);
1105 return -1;
1106 }
1107
1108 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1109 printk(KERN_ERR "dev[%p]: Unable to change SE Device TAS while"
1110 " dev_export_obj: %d count exists\n", dev,
1111 atomic_read(&dev->dev_export_obj.obj_access_count));
1112 return -1;
1113 }
1114 DEV_ATTRIB(dev)->emulate_tas = flag;
1115 printk(KERN_INFO "dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
1116 dev, (DEV_ATTRIB(dev)->emulate_tas) ? "Enabled" : "Disabled");
1117
1118 return 0;
1119}
1120
1121int se_dev_set_emulate_tpu(struct se_device *dev, int flag)
1122{
1123 if ((flag != 0) && (flag != 1)) {
1124 printk(KERN_ERR "Illegal value %d\n", flag);
1125 return -1;
1126 }
1127 /*
1128 * We expect this value to be non-zero when generic Block Layer
1129 * Discard supported is detected iblock_create_virtdevice().
1130 */
1131 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1132 printk(KERN_ERR "Generic Block Discard not supported\n");
1133 return -ENOSYS;
1134 }
1135
1136 DEV_ATTRIB(dev)->emulate_tpu = flag;
1137 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
1138 dev, flag);
1139 return 0;
1140}
1141
1142int se_dev_set_emulate_tpws(struct se_device *dev, int flag)
1143{
1144 if ((flag != 0) && (flag != 1)) {
1145 printk(KERN_ERR "Illegal value %d\n", flag);
1146 return -1;
1147 }
1148 /*
1149 * We expect this value to be non-zero when generic Block Layer
1150 * Discard supported is detected iblock_create_virtdevice().
1151 */
1152 if (!(DEV_ATTRIB(dev)->max_unmap_block_desc_count)) {
1153 printk(KERN_ERR "Generic Block Discard not supported\n");
1154 return -ENOSYS;
1155 }
1156
1157 DEV_ATTRIB(dev)->emulate_tpws = flag;
1158 printk(KERN_INFO "dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
1159 dev, flag);
1160 return 0;
1161}
1162
1163int se_dev_set_enforce_pr_isids(struct se_device *dev, int flag)
1164{
1165 if ((flag != 0) && (flag != 1)) {
1166 printk(KERN_ERR "Illegal value %d\n", flag);
1167 return -1;
1168 }
1169 DEV_ATTRIB(dev)->enforce_pr_isids = flag;
1170 printk(KERN_INFO "dev[%p]: SE Device enforce_pr_isids bit: %s\n", dev,
1171 (DEV_ATTRIB(dev)->enforce_pr_isids) ? "Enabled" : "Disabled");
1172 return 0;
1173}
1174
1175/*
1176 * Note, this can only be called on unexported SE Device Object.
1177 */
1178int se_dev_set_queue_depth(struct se_device *dev, u32 queue_depth)
1179{
1180 u32 orig_queue_depth = dev->queue_depth;
1181
1182 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1183 printk(KERN_ERR "dev[%p]: Unable to change SE Device TCQ while"
1184 " dev_export_obj: %d count exists\n", dev,
1185 atomic_read(&dev->dev_export_obj.obj_access_count));
1186 return -1;
1187 }
1188 if (!(queue_depth)) {
1189 printk(KERN_ERR "dev[%p]: Illegal ZERO value for queue"
1190 "_depth\n", dev);
1191 return -1;
1192 }
1193
1194 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1195 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1196 printk(KERN_ERR "dev[%p]: Passed queue_depth: %u"
1197 " exceeds TCM/SE_Device TCQ: %u\n",
1198 dev, queue_depth,
1199 DEV_ATTRIB(dev)->hw_queue_depth);
1200 return -1;
1201 }
1202 } else {
1203 if (queue_depth > DEV_ATTRIB(dev)->queue_depth) {
1204 if (queue_depth > DEV_ATTRIB(dev)->hw_queue_depth) {
1205 printk(KERN_ERR "dev[%p]: Passed queue_depth:"
1206 " %u exceeds TCM/SE_Device MAX"
1207 " TCQ: %u\n", dev, queue_depth,
1208 DEV_ATTRIB(dev)->hw_queue_depth);
1209 return -1;
1210 }
1211 }
1212 }
1213
1214 DEV_ATTRIB(dev)->queue_depth = dev->queue_depth = queue_depth;
1215 if (queue_depth > orig_queue_depth)
1216 atomic_add(queue_depth - orig_queue_depth, &dev->depth_left);
1217 else if (queue_depth < orig_queue_depth)
1218 atomic_sub(orig_queue_depth - queue_depth, &dev->depth_left);
1219
1220 printk(KERN_INFO "dev[%p]: SE Device TCQ Depth changed to: %u\n",
1221 dev, queue_depth);
1222 return 0;
1223}
1224
1225int se_dev_set_max_sectors(struct se_device *dev, u32 max_sectors)
1226{
1227 int force = 0; /* Force setting for VDEVS */
1228
1229 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1230 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1231 " max_sectors while dev_export_obj: %d count exists\n",
1232 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1233 return -1;
1234 }
1235 if (!(max_sectors)) {
1236 printk(KERN_ERR "dev[%p]: Illegal ZERO value for"
1237 " max_sectors\n", dev);
1238 return -1;
1239 }
1240 if (max_sectors < DA_STATUS_MAX_SECTORS_MIN) {
1241 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u less than"
1242 " DA_STATUS_MAX_SECTORS_MIN: %u\n", dev, max_sectors,
1243 DA_STATUS_MAX_SECTORS_MIN);
1244 return -1;
1245 }
1246 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1247 if (max_sectors > DEV_ATTRIB(dev)->hw_max_sectors) {
1248 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1249 " greater than TCM/SE_Device max_sectors:"
1250 " %u\n", dev, max_sectors,
1251 DEV_ATTRIB(dev)->hw_max_sectors);
1252 return -1;
1253 }
1254 } else {
1255 if (!(force) && (max_sectors >
1256 DEV_ATTRIB(dev)->hw_max_sectors)) {
1257 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1258 " greater than TCM/SE_Device max_sectors"
1259 ": %u, use force=1 to override.\n", dev,
1260 max_sectors, DEV_ATTRIB(dev)->hw_max_sectors);
1261 return -1;
1262 }
1263 if (max_sectors > DA_STATUS_MAX_SECTORS_MAX) {
1264 printk(KERN_ERR "dev[%p]: Passed max_sectors: %u"
1265 " greater than DA_STATUS_MAX_SECTORS_MAX:"
1266 " %u\n", dev, max_sectors,
1267 DA_STATUS_MAX_SECTORS_MAX);
1268 return -1;
1269 }
1270 }
1271
1272 DEV_ATTRIB(dev)->max_sectors = max_sectors;
1273 printk("dev[%p]: SE Device max_sectors changed to %u\n",
1274 dev, max_sectors);
1275 return 0;
1276}
1277
1278int se_dev_set_optimal_sectors(struct se_device *dev, u32 optimal_sectors)
1279{
1280 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1281 printk(KERN_ERR "dev[%p]: Unable to change SE Device"
1282 " optimal_sectors while dev_export_obj: %d count exists\n",
1283 dev, atomic_read(&dev->dev_export_obj.obj_access_count));
1284 return -EINVAL;
1285 }
1286 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1287 printk(KERN_ERR "dev[%p]: Passed optimal_sectors cannot be"
1288 " changed for TCM/pSCSI\n", dev);
1289 return -EINVAL;
1290 }
1291 if (optimal_sectors > DEV_ATTRIB(dev)->max_sectors) {
1292 printk(KERN_ERR "dev[%p]: Passed optimal_sectors %u cannot be"
1293 " greater than max_sectors: %u\n", dev,
1294 optimal_sectors, DEV_ATTRIB(dev)->max_sectors);
1295 return -EINVAL;
1296 }
1297
1298 DEV_ATTRIB(dev)->optimal_sectors = optimal_sectors;
1299 printk(KERN_INFO "dev[%p]: SE Device optimal_sectors changed to %u\n",
1300 dev, optimal_sectors);
1301 return 0;
1302}
1303
1304int se_dev_set_block_size(struct se_device *dev, u32 block_size)
1305{
1306 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1307 printk(KERN_ERR "dev[%p]: Unable to change SE Device block_size"
1308 " while dev_export_obj: %d count exists\n", dev,
1309 atomic_read(&dev->dev_export_obj.obj_access_count));
1310 return -1;
1311 }
1312
1313 if ((block_size != 512) &&
1314 (block_size != 1024) &&
1315 (block_size != 2048) &&
1316 (block_size != 4096)) {
1317 printk(KERN_ERR "dev[%p]: Illegal value for block_device: %u"
1318 " for SE device, must be 512, 1024, 2048 or 4096\n",
1319 dev, block_size);
1320 return -1;
1321 }
1322
1323 if (TRANSPORT(dev)->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV) {
1324 printk(KERN_ERR "dev[%p]: Not allowed to change block_size for"
1325 " Physical Device, use for Linux/SCSI to change"
1326 " block_size for underlying hardware\n", dev);
1327 return -1;
1328 }
1329
1330 DEV_ATTRIB(dev)->block_size = block_size;
1331 printk(KERN_INFO "dev[%p]: SE Device block_size changed to %u\n",
1332 dev, block_size);
1333 return 0;
1334}
1335
1336struct se_lun *core_dev_add_lun(
1337 struct se_portal_group *tpg,
1338 struct se_hba *hba,
1339 struct se_device *dev,
1340 u32 lun)
1341{
1342 struct se_lun *lun_p;
1343 u32 lun_access = 0;
1344
1345 if (atomic_read(&dev->dev_access_obj.obj_access_count) != 0) {
1346 printk(KERN_ERR "Unable to export struct se_device while dev_access_obj: %d\n",
1347 atomic_read(&dev->dev_access_obj.obj_access_count));
1348 return NULL;
1349 }
1350
1351 lun_p = core_tpg_pre_addlun(tpg, lun);
1352 if ((IS_ERR(lun_p)) || !(lun_p))
1353 return NULL;
1354
1355 if (dev->dev_flags & DF_READ_ONLY)
1356 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1357 else
1358 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
1359
1360 if (core_tpg_post_addlun(tpg, lun_p, lun_access, dev) < 0)
1361 return NULL;
1362
1363 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Activated %s Logical Unit from"
1364 " CORE HBA: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1365 TPG_TFO(tpg)->tpg_get_tag(tpg), lun_p->unpacked_lun,
1366 TPG_TFO(tpg)->get_fabric_name(), hba->hba_id);
1367 /*
1368 * Update LUN maps for dynamically added initiators when
1369 * generate_node_acl is enabled.
1370 */
1371 if (TPG_TFO(tpg)->tpg_check_demo_mode(tpg)) {
1372 struct se_node_acl *acl;
1373 spin_lock_bh(&tpg->acl_node_lock);
1374 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
1375 if (acl->dynamic_node_acl) {
1376 spin_unlock_bh(&tpg->acl_node_lock);
1377 core_tpg_add_node_to_devs(acl, tpg);
1378 spin_lock_bh(&tpg->acl_node_lock);
1379 }
1380 }
1381 spin_unlock_bh(&tpg->acl_node_lock);
1382 }
1383
1384 return lun_p;
1385}
1386
1387/* core_dev_del_lun():
1388 *
1389 *
1390 */
1391int core_dev_del_lun(
1392 struct se_portal_group *tpg,
1393 u32 unpacked_lun)
1394{
1395 struct se_lun *lun;
1396 int ret = 0;
1397
1398 lun = core_tpg_pre_dellun(tpg, unpacked_lun, &ret);
1399 if (!(lun))
1400 return ret;
1401
1402 core_tpg_post_dellun(tpg, lun);
1403
1404 printk(KERN_INFO "%s_TPG[%u]_LUN[%u] - Deactivated %s Logical Unit from"
1405 " device object\n", TPG_TFO(tpg)->get_fabric_name(),
1406 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun,
1407 TPG_TFO(tpg)->get_fabric_name());
1408
1409 return 0;
1410}
1411
1412struct se_lun *core_get_lun_from_tpg(struct se_portal_group *tpg, u32 unpacked_lun)
1413{
1414 struct se_lun *lun;
1415
1416 spin_lock(&tpg->tpg_lun_lock);
1417 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1418 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS"
1419 "_PER_TPG-1: %u for Target Portal Group: %hu\n",
1420 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1421 TRANSPORT_MAX_LUNS_PER_TPG-1,
1422 TPG_TFO(tpg)->tpg_get_tag(tpg));
1423 spin_unlock(&tpg->tpg_lun_lock);
1424 return NULL;
1425 }
1426 lun = &tpg->tpg_lun_list[unpacked_lun];
1427
1428 if (lun->lun_status != TRANSPORT_LUN_STATUS_FREE) {
1429 printk(KERN_ERR "%s Logical Unit Number: %u is not free on"
1430 " Target Portal Group: %hu, ignoring request.\n",
1431 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1432 TPG_TFO(tpg)->tpg_get_tag(tpg));
1433 spin_unlock(&tpg->tpg_lun_lock);
1434 return NULL;
1435 }
1436 spin_unlock(&tpg->tpg_lun_lock);
1437
1438 return lun;
1439}
1440
1441/* core_dev_get_lun():
1442 *
1443 *
1444 */
1445static struct se_lun *core_dev_get_lun(struct se_portal_group *tpg, u32 unpacked_lun)
1446{
1447 struct se_lun *lun;
1448
1449 spin_lock(&tpg->tpg_lun_lock);
1450 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
1451 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER"
1452 "_TPG-1: %u for Target Portal Group: %hu\n",
1453 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1454 TRANSPORT_MAX_LUNS_PER_TPG-1,
1455 TPG_TFO(tpg)->tpg_get_tag(tpg));
1456 spin_unlock(&tpg->tpg_lun_lock);
1457 return NULL;
1458 }
1459 lun = &tpg->tpg_lun_list[unpacked_lun];
1460
1461 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
1462 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1463 " Target Portal Group: %hu, ignoring request.\n",
1464 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1465 TPG_TFO(tpg)->tpg_get_tag(tpg));
1466 spin_unlock(&tpg->tpg_lun_lock);
1467 return NULL;
1468 }
1469 spin_unlock(&tpg->tpg_lun_lock);
1470
1471 return lun;
1472}
1473
1474struct se_lun_acl *core_dev_init_initiator_node_lun_acl(
1475 struct se_portal_group *tpg,
1476 u32 mapped_lun,
1477 char *initiatorname,
1478 int *ret)
1479{
1480 struct se_lun_acl *lacl;
1481 struct se_node_acl *nacl;
1482
1483 if (strlen(initiatorname) > TRANSPORT_IQN_LEN) {
1484 printk(KERN_ERR "%s InitiatorName exceeds maximum size.\n",
1485 TPG_TFO(tpg)->get_fabric_name());
1486 *ret = -EOVERFLOW;
1487 return NULL;
1488 }
1489 nacl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
1490 if (!(nacl)) {
1491 *ret = -EINVAL;
1492 return NULL;
1493 }
1494 lacl = kzalloc(sizeof(struct se_lun_acl), GFP_KERNEL);
1495 if (!(lacl)) {
1496 printk(KERN_ERR "Unable to allocate memory for struct se_lun_acl.\n");
1497 *ret = -ENOMEM;
1498 return NULL;
1499 }
1500
1501 INIT_LIST_HEAD(&lacl->lacl_list);
1502 lacl->mapped_lun = mapped_lun;
1503 lacl->se_lun_nacl = nacl;
1504 snprintf(lacl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
1505
1506 return lacl;
1507}
1508
1509int core_dev_add_initiator_node_lun_acl(
1510 struct se_portal_group *tpg,
1511 struct se_lun_acl *lacl,
1512 u32 unpacked_lun,
1513 u32 lun_access)
1514{
1515 struct se_lun *lun;
1516 struct se_node_acl *nacl;
1517
1518 lun = core_dev_get_lun(tpg, unpacked_lun);
1519 if (!(lun)) {
1520 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
1521 " Target Portal Group: %hu, ignoring request.\n",
1522 TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
1523 TPG_TFO(tpg)->tpg_get_tag(tpg));
1524 return -EINVAL;
1525 }
1526
1527 nacl = lacl->se_lun_nacl;
1528 if (!(nacl))
1529 return -EINVAL;
1530
1531 if ((lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) &&
1532 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE))
1533 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
1534
1535 lacl->se_lun = lun;
1536
1537 if (core_update_device_list_for_node(lun, lacl, lacl->mapped_lun,
1538 lun_access, nacl, tpg, 1) < 0)
1539 return -EINVAL;
1540
1541 spin_lock(&lun->lun_acl_lock);
1542 list_add_tail(&lacl->lacl_list, &lun->lun_acl_list);
1543 atomic_inc(&lun->lun_acl_count);
1544 smp_mb__after_atomic_inc();
1545 spin_unlock(&lun->lun_acl_lock);
1546
1547 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u->%u] - Added %s ACL for "
1548 " InitiatorNode: %s\n", TPG_TFO(tpg)->get_fabric_name(),
1549 TPG_TFO(tpg)->tpg_get_tag(tpg), unpacked_lun, lacl->mapped_lun,
1550 (lun_access & TRANSPORT_LUNFLAGS_READ_WRITE) ? "RW" : "RO",
1551 lacl->initiatorname);
1552 /*
1553 * Check to see if there are any existing persistent reservation APTPL
1554 * pre-registrations that need to be enabled for this LUN ACL..
1555 */
1556 core_scsi3_check_aptpl_registration(lun->lun_se_dev, tpg, lun, lacl);
1557 return 0;
1558}
1559
1560/* core_dev_del_initiator_node_lun_acl():
1561 *
1562 *
1563 */
1564int core_dev_del_initiator_node_lun_acl(
1565 struct se_portal_group *tpg,
1566 struct se_lun *lun,
1567 struct se_lun_acl *lacl)
1568{
1569 struct se_node_acl *nacl;
1570
1571 nacl = lacl->se_lun_nacl;
1572 if (!(nacl))
1573 return -EINVAL;
1574
1575 spin_lock(&lun->lun_acl_lock);
1576 list_del(&lacl->lacl_list);
1577 atomic_dec(&lun->lun_acl_count);
1578 smp_mb__after_atomic_dec();
1579 spin_unlock(&lun->lun_acl_lock);
1580
1581 core_update_device_list_for_node(lun, NULL, lacl->mapped_lun,
1582 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
1583
1584 lacl->se_lun = NULL;
1585
1586 printk(KERN_INFO "%s_TPG[%hu]_LUN[%u] - Removed ACL for"
1587 " InitiatorNode: %s Mapped LUN: %u\n",
1588 TPG_TFO(tpg)->get_fabric_name(),
1589 TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
1590 lacl->initiatorname, lacl->mapped_lun);
1591
1592 return 0;
1593}
1594
1595void core_dev_free_initiator_node_lun_acl(
1596 struct se_portal_group *tpg,
1597 struct se_lun_acl *lacl)
1598{
1599 printk("%s_TPG[%hu] - Freeing ACL for %s InitiatorNode: %s"
1600 " Mapped LUN: %u\n", TPG_TFO(tpg)->get_fabric_name(),
1601 TPG_TFO(tpg)->tpg_get_tag(tpg),
1602 TPG_TFO(tpg)->get_fabric_name(),
1603 lacl->initiatorname, lacl->mapped_lun);
1604
1605 kfree(lacl);
1606}
1607
1608int core_dev_setup_virtual_lun0(void)
1609{
1610 struct se_hba *hba;
1611 struct se_device *dev;
1612 struct se_subsystem_dev *se_dev = NULL;
1613 struct se_subsystem_api *t;
1614 char buf[16];
1615 int ret;
1616
1617 hba = core_alloc_hba("rd_dr", 0, HBA_FLAGS_INTERNAL_USE);
1618 if (IS_ERR(hba))
1619 return PTR_ERR(hba);
1620
1621 se_global->g_lun0_hba = hba;
1622 t = hba->transport;
1623
1624 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
1625 if (!(se_dev)) {
1626 printk(KERN_ERR "Unable to allocate memory for"
1627 " struct se_subsystem_dev\n");
1628 ret = -ENOMEM;
1629 goto out;
1630 }
1631 INIT_LIST_HEAD(&se_dev->g_se_dev_list);
1632 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
1633 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
1634 INIT_LIST_HEAD(&se_dev->t10_reservation.registration_list);
1635 INIT_LIST_HEAD(&se_dev->t10_reservation.aptpl_reg_list);
1636 spin_lock_init(&se_dev->t10_reservation.registration_lock);
1637 spin_lock_init(&se_dev->t10_reservation.aptpl_reg_lock);
1638 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
1639 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
1640 spin_lock_init(&se_dev->se_dev_lock);
1641 se_dev->t10_reservation.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
1642 se_dev->t10_wwn.t10_sub_dev = se_dev;
1643 se_dev->t10_alua.t10_sub_dev = se_dev;
1644 se_dev->se_dev_attrib.da_sub_dev = se_dev;
1645 se_dev->se_dev_hba = hba;
1646
1647 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, "virt_lun0");
1648 if (!(se_dev->se_dev_su_ptr)) {
1649 printk(KERN_ERR "Unable to locate subsystem dependent pointer"
1650 " from allocate_virtdevice()\n");
1651 ret = -ENOMEM;
1652 goto out;
1653 }
1654 se_global->g_lun0_su_dev = se_dev;
1655
1656 memset(buf, 0, 16);
1657 sprintf(buf, "rd_pages=8");
1658 t->set_configfs_dev_params(hba, se_dev, buf, sizeof(buf));
1659
1660 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1661 if (!(dev) || IS_ERR(dev)) {
1662 ret = -ENOMEM;
1663 goto out;
1664 }
1665 se_dev->se_dev_ptr = dev;
1666 se_global->g_lun0_dev = dev;
1667
1668 return 0;
1669out:
1670 se_global->g_lun0_su_dev = NULL;
1671 kfree(se_dev);
1672 if (se_global->g_lun0_hba) {
1673 core_delete_hba(se_global->g_lun0_hba);
1674 se_global->g_lun0_hba = NULL;
1675 }
1676 return ret;
1677}
1678
1679
1680void core_dev_release_virtual_lun0(void)
1681{
1682 struct se_hba *hba = se_global->g_lun0_hba;
1683 struct se_subsystem_dev *su_dev = se_global->g_lun0_su_dev;
1684
1685 if (!(hba))
1686 return;
1687
1688 if (se_global->g_lun0_dev)
1689 se_free_virtual_device(se_global->g_lun0_dev, hba);
1690
1691 kfree(su_dev);
1692 core_delete_hba(hba);
1693}
Linux kernel - Deliverables
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