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target: Eliminate usage of struct se_mem
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / target / target_core_tpg.c
CommitLineData
c66ac9db
NB		 1/*******************************************************************************
2 * Filename: target_core_tpg.c
3 *
4 * This file contains generic Target Portal Group related functions.
5 *
6 * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
7 * Copyright (c) 2005, 2006, 2007 SBE, Inc.
8 * Copyright (c) 2007-2010 Rising Tide Systems
9 * Copyright (c) 2008-2010 Linux-iSCSI.org
10 *
11 * Nicholas A. Bellinger <nab@kernel.org>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 *
27 ******************************************************************************/
28
29#include <linux/net.h>
30#include <linux/string.h>
31#include <linux/timer.h>
32#include <linux/slab.h>
33#include <linux/spinlock.h>
c66ac9db
NB		 34#include <linux/in.h>
35#include <net/sock.h>
36#include <net/tcp.h>
37#include <scsi/scsi.h>
38#include <scsi/scsi_cmnd.h>
39
40#include <target/target_core_base.h>
41#include <target/target_core_device.h>
42#include <target/target_core_tpg.h>
43#include <target/target_core_transport.h>
44#include <target/target_core_fabric_ops.h>
45
46#include "target_core_hba.h"
e3d6f909
AG		 47#include "target_core_stat.h"
48
49extern struct se_device *g_lun0_dev;
50
51static DEFINE_SPINLOCK(tpg_lock);
52static LIST_HEAD(tpg_list);
c66ac9db
NB		 53
54/* core_clear_initiator_node_from_tpg():
55 *
56 *
57 */
58static void core_clear_initiator_node_from_tpg(
59 struct se_node_acl *nacl,
60 struct se_portal_group *tpg)
61{
62 int i;
63 struct se_dev_entry *deve;
64 struct se_lun *lun;
65 struct se_lun_acl *acl, *acl_tmp;
66
67 spin_lock_irq(&nacl->device_list_lock);
68 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
69 deve = &nacl->device_list[i];
70
71 if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
72 continue;
73
74 if (!deve->se_lun) {
75 printk(KERN_ERR "%s device entries device pointer is"
76 " NULL, but Initiator has access.\n",
e3d6f909 77 tpg->se_tpg_tfo->get_fabric_name());
c66ac9db
NB		 78 continue;
79 }
80
81 lun = deve->se_lun;
82 spin_unlock_irq(&nacl->device_list_lock);
83 core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
84 TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
85
86 spin_lock(&lun->lun_acl_lock);
87 list_for_each_entry_safe(acl, acl_tmp,
88 &lun->lun_acl_list, lacl_list) {
89 if (!(strcmp(acl->initiatorname,
90 nacl->initiatorname)) &&
91 (acl->mapped_lun == deve->mapped_lun))
92 break;
93 }
94
95 if (!acl) {
96 printk(KERN_ERR "Unable to locate struct se_lun_acl for %s,"
97 " mapped_lun: %u\n", nacl->initiatorname,
98 deve->mapped_lun);
99 spin_unlock(&lun->lun_acl_lock);
100 spin_lock_irq(&nacl->device_list_lock);
101 continue;
102 }
103
104 list_del(&acl->lacl_list);
105 spin_unlock(&lun->lun_acl_lock);
106
107 spin_lock_irq(&nacl->device_list_lock);
108 kfree(acl);
109 }
110 spin_unlock_irq(&nacl->device_list_lock);
111}
112
113/* __core_tpg_get_initiator_node_acl():
114 *
115 * spin_lock_bh(&tpg->acl_node_lock); must be held when calling
116 */
117struct se_node_acl *__core_tpg_get_initiator_node_acl(
118 struct se_portal_group *tpg,
119 const char *initiatorname)
120{
121 struct se_node_acl *acl;
122
123 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
124 if (!(strcmp(acl->initiatorname, initiatorname)))
125 return acl;
126 }
127
128 return NULL;
129}
130
131/* core_tpg_get_initiator_node_acl():
132 *
133 *
134 */
135struct se_node_acl *core_tpg_get_initiator_node_acl(
136 struct se_portal_group *tpg,
137 unsigned char *initiatorname)
138{
139 struct se_node_acl *acl;
140
141 spin_lock_bh(&tpg->acl_node_lock);
142 list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
143 if (!(strcmp(acl->initiatorname, initiatorname)) &&
144 (!(acl->dynamic_node_acl))) {
145 spin_unlock_bh(&tpg->acl_node_lock);
146 return acl;
147 }
148 }
149 spin_unlock_bh(&tpg->acl_node_lock);
150
151 return NULL;
152}
153
154/* core_tpg_add_node_to_devs():
155 *
156 *
157 */
158void core_tpg_add_node_to_devs(
159 struct se_node_acl *acl,
160 struct se_portal_group *tpg)
161{
162 int i = 0;
163 u32 lun_access = 0;
164 struct se_lun *lun;
165 struct se_device *dev;
166
167 spin_lock(&tpg->tpg_lun_lock);
168 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
169 lun = &tpg->tpg_lun_list[i];
170 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
171 continue;
172
173 spin_unlock(&tpg->tpg_lun_lock);
174
175 dev = lun->lun_se_dev;
176 /*
177 * By default in LIO-Target $FABRIC_MOD,
178 * demo_mode_write_protect is ON, or READ_ONLY;
179 */
e3d6f909 180 if (!(tpg->se_tpg_tfo->tpg_check_demo_mode_write_protect(tpg))) {
c66ac9db
NB		 181 if (dev->dev_flags & DF_READ_ONLY)
182 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
183 else
184 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
185 } else {
186 /*
187 * Allow only optical drives to issue R/W in default RO
188 * demo mode.
189 */
e3d6f909 190 if (dev->transport->get_device_type(dev) == TYPE_DISK)
c66ac9db
NB		 191 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
192 else
193 lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
194 }
195
196 printk(KERN_INFO "TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
197 " access for LUN in Demo Mode\n",
e3d6f909
AG		 198 tpg->se_tpg_tfo->get_fabric_name(),
199 tpg->se_tpg_tfo->tpg_get_tag(tpg), lun->unpacked_lun,
c66ac9db
NB		 200 (lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
201 "READ-WRITE" : "READ-ONLY");
202
203 core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
204 lun_access, acl, tpg, 1);
205 spin_lock(&tpg->tpg_lun_lock);
206 }
207 spin_unlock(&tpg->tpg_lun_lock);
208}
209
210/* core_set_queue_depth_for_node():
211 *
212 *
213 */
214static int core_set_queue_depth_for_node(
215 struct se_portal_group *tpg,
216 struct se_node_acl *acl)
217{
218 if (!acl->queue_depth) {
219 printk(KERN_ERR "Queue depth for %s Initiator Node: %s is 0,"
e3d6f909 220 "defaulting to 1.\n", tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db
NB		 221 acl->initiatorname);
222 acl->queue_depth = 1;
223 }
224
225 return 0;
226}
227
228/* core_create_device_list_for_node():
229 *
230 *
231 */
232static int core_create_device_list_for_node(struct se_node_acl *nacl)
233{
234 struct se_dev_entry *deve;
235 int i;
236
237 nacl->device_list = kzalloc(sizeof(struct se_dev_entry) *
238 TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL);
239 if (!(nacl->device_list)) {
240 printk(KERN_ERR "Unable to allocate memory for"
241 " struct se_node_acl->device_list\n");
e3d6f909 242 return -ENOMEM;
c66ac9db
NB		 243 }
244 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
245 deve = &nacl->device_list[i];
246
247 atomic_set(&deve->ua_count, 0);
248 atomic_set(&deve->pr_ref_count, 0);
249 spin_lock_init(&deve->ua_lock);
250 INIT_LIST_HEAD(&deve->alua_port_list);
251 INIT_LIST_HEAD(&deve->ua_list);
252 }
253
254 return 0;
255}
256
257/* core_tpg_check_initiator_node_acl()
258 *
259 *
260 */
261struct se_node_acl *core_tpg_check_initiator_node_acl(
262 struct se_portal_group *tpg,
263 unsigned char *initiatorname)
264{
265 struct se_node_acl *acl;
266
267 acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
268 if ((acl))
269 return acl;
270
e3d6f909 271 if (!(tpg->se_tpg_tfo->tpg_check_demo_mode(tpg)))
c66ac9db
NB		 272 return NULL;
273
e3d6f909 274 acl = tpg->se_tpg_tfo->tpg_alloc_fabric_acl(tpg);
c66ac9db
NB		 275 if (!(acl))
276 return NULL;
277
278 INIT_LIST_HEAD(&acl->acl_list);
279 INIT_LIST_HEAD(&acl->acl_sess_list);
280 spin_lock_init(&acl->device_list_lock);
281 spin_lock_init(&acl->nacl_sess_lock);
282 atomic_set(&acl->acl_pr_ref_count, 0);
e3d6f909 283 acl->queue_depth = tpg->se_tpg_tfo->tpg_get_default_depth(tpg);
c66ac9db
NB		 284 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
285 acl->se_tpg = tpg;
286 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
287 spin_lock_init(&acl->stats_lock);
288 acl->dynamic_node_acl = 1;
289
e3d6f909 290 tpg->se_tpg_tfo->set_default_node_attributes(acl);
c66ac9db
NB		 291
292 if (core_create_device_list_for_node(acl) < 0) {
e3d6f909 293 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
c66ac9db
NB		 294 return NULL;
295 }
296
297 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
298 core_free_device_list_for_node(acl, tpg);
e3d6f909 299 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
c66ac9db
NB		 300 return NULL;
301 }
302
303 core_tpg_add_node_to_devs(acl, tpg);
304
305 spin_lock_bh(&tpg->acl_node_lock);
306 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
307 tpg->num_node_acls++;
308 spin_unlock_bh(&tpg->acl_node_lock);
309
310 printk("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
e3d6f909
AG		 311 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
312 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
313 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
c66ac9db
NB		 314
315 return acl;
316}
317EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
318
319void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
320{
321 while (atomic_read(&nacl->acl_pr_ref_count) != 0)
322 cpu_relax();
323}
324
c66ac9db
NB		 325void core_tpg_clear_object_luns(struct se_portal_group *tpg)
326{
327 int i, ret;
328 struct se_lun *lun;
329
330 spin_lock(&tpg->tpg_lun_lock);
331 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
332 lun = &tpg->tpg_lun_list[i];
333
334 if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
335 (lun->lun_se_dev == NULL))
336 continue;
337
338 spin_unlock(&tpg->tpg_lun_lock);
339 ret = core_dev_del_lun(tpg, lun->unpacked_lun);
340 spin_lock(&tpg->tpg_lun_lock);
341 }
342 spin_unlock(&tpg->tpg_lun_lock);
343}
344EXPORT_SYMBOL(core_tpg_clear_object_luns);
345
346/* core_tpg_add_initiator_node_acl():
347 *
348 *
349 */
350struct se_node_acl *core_tpg_add_initiator_node_acl(
351 struct se_portal_group *tpg,
352 struct se_node_acl *se_nacl,
353 const char *initiatorname,
354 u32 queue_depth)
355{
356 struct se_node_acl *acl = NULL;
357
358 spin_lock_bh(&tpg->acl_node_lock);
359 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
360 if ((acl)) {
361 if (acl->dynamic_node_acl) {
362 acl->dynamic_node_acl = 0;
363 printk(KERN_INFO "%s_TPG[%u] - Replacing dynamic ACL"
e3d6f909
AG		 364 " for %s\n", tpg->se_tpg_tfo->get_fabric_name(),
365 tpg->se_tpg_tfo->tpg_get_tag(tpg), initiatorname);
c66ac9db
NB		 366 spin_unlock_bh(&tpg->acl_node_lock);
367 /*
368 * Release the locally allocated struct se_node_acl
369 * because * core_tpg_add_initiator_node_acl() returned
370 * a pointer to an existing demo mode node ACL.
371 */
372 if (se_nacl)
e3d6f909 373 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg,
c66ac9db
NB		 374 se_nacl);
375 goto done;
376 }
377
378 printk(KERN_ERR "ACL entry for %s Initiator"
379 " Node %s already exists for TPG %u, ignoring"
e3d6f909
AG		 380 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
381 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 382 spin_unlock_bh(&tpg->acl_node_lock);
383 return ERR_PTR(-EEXIST);
384 }
385 spin_unlock_bh(&tpg->acl_node_lock);
386
387 if (!(se_nacl)) {
388 printk("struct se_node_acl pointer is NULL\n");
389 return ERR_PTR(-EINVAL);
390 }
391 /*
392 * For v4.x logic the se_node_acl_s is hanging off a fabric
393 * dependent structure allocated via
394 * struct target_core_fabric_ops->fabric_make_nodeacl()
395 */
396 acl = se_nacl;
397
398 INIT_LIST_HEAD(&acl->acl_list);
399 INIT_LIST_HEAD(&acl->acl_sess_list);
400 spin_lock_init(&acl->device_list_lock);
401 spin_lock_init(&acl->nacl_sess_lock);
402 atomic_set(&acl->acl_pr_ref_count, 0);
403 acl->queue_depth = queue_depth;
404 snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
405 acl->se_tpg = tpg;
406 acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
407 spin_lock_init(&acl->stats_lock);
408
e3d6f909 409 tpg->se_tpg_tfo->set_default_node_attributes(acl);
c66ac9db
NB		 410
411 if (core_create_device_list_for_node(acl) < 0) {
e3d6f909 412 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
c66ac9db
NB		 413 return ERR_PTR(-ENOMEM);
414 }
415
416 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
417 core_free_device_list_for_node(acl, tpg);
e3d6f909 418 tpg->se_tpg_tfo->tpg_release_fabric_acl(tpg, acl);
c66ac9db
NB		 419 return ERR_PTR(-EINVAL);
420 }
421
422 spin_lock_bh(&tpg->acl_node_lock);
423 list_add_tail(&acl->acl_list, &tpg->acl_node_list);
424 tpg->num_node_acls++;
425 spin_unlock_bh(&tpg->acl_node_lock);
426
427done:
428 printk(KERN_INFO "%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
e3d6f909
AG		 429 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
430 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
431 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
c66ac9db
NB		 432
433 return acl;
434}
435EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
436
437/* core_tpg_del_initiator_node_acl():
438 *
439 *
440 */
441int core_tpg_del_initiator_node_acl(
442 struct se_portal_group *tpg,
443 struct se_node_acl *acl,
444 int force)
445{
446 struct se_session *sess, *sess_tmp;
447 int dynamic_acl = 0;
448
449 spin_lock_bh(&tpg->acl_node_lock);
450 if (acl->dynamic_node_acl) {
451 acl->dynamic_node_acl = 0;
452 dynamic_acl = 1;
453 }
454 list_del(&acl->acl_list);
455 tpg->num_node_acls--;
456 spin_unlock_bh(&tpg->acl_node_lock);
457
458 spin_lock_bh(&tpg->session_lock);
459 list_for_each_entry_safe(sess, sess_tmp,
460 &tpg->tpg_sess_list, sess_list) {
461 if (sess->se_node_acl != acl)
462 continue;
463 /*
464 * Determine if the session needs to be closed by our context.
465 */
e3d6f909 466 if (!(tpg->se_tpg_tfo->shutdown_session(sess)))
c66ac9db
NB		 467 continue;
468
469 spin_unlock_bh(&tpg->session_lock);
470 /*
471 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
472 * forcefully shutdown the $FABRIC_MOD session/nexus.
473 */
e3d6f909 474 tpg->se_tpg_tfo->close_session(sess);
c66ac9db
NB		 475
476 spin_lock_bh(&tpg->session_lock);
477 }
478 spin_unlock_bh(&tpg->session_lock);
479
480 core_tpg_wait_for_nacl_pr_ref(acl);
c66ac9db
NB		 481 core_clear_initiator_node_from_tpg(acl, tpg);
482 core_free_device_list_for_node(acl, tpg);
483
484 printk(KERN_INFO "%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
e3d6f909
AG		 485 " Initiator Node: %s\n", tpg->se_tpg_tfo->get_fabric_name(),
486 tpg->se_tpg_tfo->tpg_get_tag(tpg), acl->queue_depth,
487 tpg->se_tpg_tfo->get_fabric_name(), acl->initiatorname);
c66ac9db
NB		 488
489 return 0;
490}
491EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
492
493/* core_tpg_set_initiator_node_queue_depth():
494 *
495 *
496 */
497int core_tpg_set_initiator_node_queue_depth(
498 struct se_portal_group *tpg,
499 unsigned char *initiatorname,
500 u32 queue_depth,
501 int force)
502{
503 struct se_session *sess, *init_sess = NULL;
504 struct se_node_acl *acl;
505 int dynamic_acl = 0;
506
507 spin_lock_bh(&tpg->acl_node_lock);
508 acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
509 if (!(acl)) {
510 printk(KERN_ERR "Access Control List entry for %s Initiator"
511 " Node %s does not exists for TPG %hu, ignoring"
e3d6f909
AG		 512 " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
513 initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 514 spin_unlock_bh(&tpg->acl_node_lock);
515 return -ENODEV;
516 }
517 if (acl->dynamic_node_acl) {
518 acl->dynamic_node_acl = 0;
519 dynamic_acl = 1;
520 }
521 spin_unlock_bh(&tpg->acl_node_lock);
522
523 spin_lock_bh(&tpg->session_lock);
524 list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
525 if (sess->se_node_acl != acl)
526 continue;
527
528 if (!force) {
529 printk(KERN_ERR "Unable to change queue depth for %s"
530 " Initiator Node: %s while session is"
531 " operational. To forcefully change the queue"
532 " depth and force session reinstatement"
533 " use the \"force=1\" parameter.\n",
e3d6f909 534 tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
c66ac9db
NB		 535 spin_unlock_bh(&tpg->session_lock);
536
537 spin_lock_bh(&tpg->acl_node_lock);
538 if (dynamic_acl)
539 acl->dynamic_node_acl = 1;
540 spin_unlock_bh(&tpg->acl_node_lock);
541 return -EEXIST;
542 }
543 /*
544 * Determine if the session needs to be closed by our context.
545 */
e3d6f909 546 if (!(tpg->se_tpg_tfo->shutdown_session(sess)))
c66ac9db
NB		 547 continue;
548
549 init_sess = sess;
550 break;
551 }
552
553 /*
554 * User has requested to change the queue depth for a Initiator Node.
555 * Change the value in the Node's struct se_node_acl, and call
556 * core_set_queue_depth_for_node() to add the requested queue depth.
557 *
e3d6f909 558 * Finally call tpg->se_tpg_tfo->close_session() to force session
c66ac9db
NB		 559 * reinstatement to occur if there is an active session for the
560 * $FABRIC_MOD Initiator Node in question.
561 */
562 acl->queue_depth = queue_depth;
563
564 if (core_set_queue_depth_for_node(tpg, acl) < 0) {
565 spin_unlock_bh(&tpg->session_lock);
566 /*
567 * Force session reinstatement if
568 * core_set_queue_depth_for_node() failed, because we assume
569 * the $FABRIC_MOD has already the set session reinstatement
e3d6f909 570 * bit from tpg->se_tpg_tfo->shutdown_session() called above.
c66ac9db
NB		 571 */
572 if (init_sess)
e3d6f909 573 tpg->se_tpg_tfo->close_session(init_sess);
c66ac9db
NB		 574
575 spin_lock_bh(&tpg->acl_node_lock);
576 if (dynamic_acl)
577 acl->dynamic_node_acl = 1;
578 spin_unlock_bh(&tpg->acl_node_lock);
579 return -EINVAL;
580 }
581 spin_unlock_bh(&tpg->session_lock);
582 /*
583 * If the $FABRIC_MOD session for the Initiator Node ACL exists,
584 * forcefully shutdown the $FABRIC_MOD session/nexus.
585 */
586 if (init_sess)
e3d6f909 587 tpg->se_tpg_tfo->close_session(init_sess);
c66ac9db
NB		 588
589 printk(KERN_INFO "Successfuly changed queue depth to: %d for Initiator"
590 " Node: %s on %s Target Portal Group: %u\n", queue_depth,
e3d6f909
AG		 591 initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
592 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 593
594 spin_lock_bh(&tpg->acl_node_lock);
595 if (dynamic_acl)
596 acl->dynamic_node_acl = 1;
597 spin_unlock_bh(&tpg->acl_node_lock);
598
599 return 0;
600}
601EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
602
603static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
604{
605 /* Set in core_dev_setup_virtual_lun0() */
e3d6f909 606 struct se_device *dev = g_lun0_dev;
c66ac9db
NB		 607 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
608 u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
609 int ret;
610
611 lun->unpacked_lun = 0;
612 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
613 atomic_set(&lun->lun_acl_count, 0);
614 init_completion(&lun->lun_shutdown_comp);
615 INIT_LIST_HEAD(&lun->lun_acl_list);
616 INIT_LIST_HEAD(&lun->lun_cmd_list);
617 spin_lock_init(&lun->lun_acl_lock);
618 spin_lock_init(&lun->lun_cmd_lock);
619 spin_lock_init(&lun->lun_sep_lock);
620
621 ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
622 if (ret < 0)
e3d6f909 623 return ret;
c66ac9db
NB		 624
625 return 0;
626}
627
628static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
629{
630 struct se_lun *lun = &se_tpg->tpg_virt_lun0;
631
632 core_tpg_post_dellun(se_tpg, lun);
633}
634
635int core_tpg_register(
636 struct target_core_fabric_ops *tfo,
637 struct se_wwn *se_wwn,
638 struct se_portal_group *se_tpg,
639 void *tpg_fabric_ptr,
640 int se_tpg_type)
641{
642 struct se_lun *lun;
643 u32 i;
644
645 se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
646 TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
647 if (!(se_tpg->tpg_lun_list)) {
648 printk(KERN_ERR "Unable to allocate struct se_portal_group->"
649 "tpg_lun_list\n");
650 return -ENOMEM;
651 }
652
653 for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
654 lun = &se_tpg->tpg_lun_list[i];
655 lun->unpacked_lun = i;
656 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
657 atomic_set(&lun->lun_acl_count, 0);
658 init_completion(&lun->lun_shutdown_comp);
659 INIT_LIST_HEAD(&lun->lun_acl_list);
660 INIT_LIST_HEAD(&lun->lun_cmd_list);
661 spin_lock_init(&lun->lun_acl_lock);
662 spin_lock_init(&lun->lun_cmd_lock);
663 spin_lock_init(&lun->lun_sep_lock);
664 }
665
666 se_tpg->se_tpg_type = se_tpg_type;
667 se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
668 se_tpg->se_tpg_tfo = tfo;
669 se_tpg->se_tpg_wwn = se_wwn;
670 atomic_set(&se_tpg->tpg_pr_ref_count, 0);
671 INIT_LIST_HEAD(&se_tpg->acl_node_list);
e3d6f909 672 INIT_LIST_HEAD(&se_tpg->se_tpg_node);
c66ac9db
NB		 673 INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
674 spin_lock_init(&se_tpg->acl_node_lock);
675 spin_lock_init(&se_tpg->session_lock);
676 spin_lock_init(&se_tpg->tpg_lun_lock);
677
678 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
679 if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
680 kfree(se_tpg);
681 return -ENOMEM;
682 }
683 }
684
e3d6f909
AG		 685 spin_lock_bh(&tpg_lock);
686 list_add_tail(&se_tpg->se_tpg_node, &tpg_list);
687 spin_unlock_bh(&tpg_lock);
c66ac9db
NB		 688
689 printk(KERN_INFO "TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
690 " endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
691 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
692 "Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
693 "None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
694
695 return 0;
696}
697EXPORT_SYMBOL(core_tpg_register);
698
699int core_tpg_deregister(struct se_portal_group *se_tpg)
700{
e89d15ee
NB		 701 struct se_node_acl *nacl, *nacl_tmp;
702
c66ac9db
NB		 703 printk(KERN_INFO "TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
704 " for endpoint: %s Portal Tag %u\n",
705 (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
e3d6f909
AG		 706 "Normal" : "Discovery", se_tpg->se_tpg_tfo->get_fabric_name(),
707 se_tpg->se_tpg_tfo->tpg_get_wwn(se_tpg),
708 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
c66ac9db 709
e3d6f909
AG		 710 spin_lock_bh(&tpg_lock);
711 list_del(&se_tpg->se_tpg_node);
712 spin_unlock_bh(&tpg_lock);
c66ac9db
NB		 713
714 while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
715 cpu_relax();
e89d15ee
NB		 716 /*
717 * Release any remaining demo-mode generated se_node_acl that have
718 * not been released because of TFO->tpg_check_demo_mode_cache() == 1
719 * in transport_deregister_session().
720 */
721 spin_lock_bh(&se_tpg->acl_node_lock);
722 list_for_each_entry_safe(nacl, nacl_tmp, &se_tpg->acl_node_list,
723 acl_list) {
724 list_del(&nacl->acl_list);
725 se_tpg->num_node_acls--;
726 spin_unlock_bh(&se_tpg->acl_node_lock);
727
728 core_tpg_wait_for_nacl_pr_ref(nacl);
729 core_free_device_list_for_node(nacl, se_tpg);
e3d6f909 730 se_tpg->se_tpg_tfo->tpg_release_fabric_acl(se_tpg, nacl);
e89d15ee
NB		 731
732 spin_lock_bh(&se_tpg->acl_node_lock);
733 }
734 spin_unlock_bh(&se_tpg->acl_node_lock);
c66ac9db
NB		 735
736 if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
737 core_tpg_release_virtual_lun0(se_tpg);
738
739 se_tpg->se_tpg_fabric_ptr = NULL;
740 kfree(se_tpg->tpg_lun_list);
741 return 0;
742}
743EXPORT_SYMBOL(core_tpg_deregister);
744
745struct se_lun *core_tpg_pre_addlun(
746 struct se_portal_group *tpg,
747 u32 unpacked_lun)
748{
749 struct se_lun *lun;
750
751 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
752 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
753 "-1: %u for Target Portal Group: %u\n",
e3d6f909 754 tpg->se_tpg_tfo->get_fabric_name(),
c66ac9db 755 unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
e3d6f909 756 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 757 return ERR_PTR(-EOVERFLOW);
758 }
759
760 spin_lock(&tpg->tpg_lun_lock);
761 lun = &tpg->tpg_lun_list[unpacked_lun];
762 if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
763 printk(KERN_ERR "TPG Logical Unit Number: %u is already active"
764 " on %s Target Portal Group: %u, ignoring request.\n",
e3d6f909
AG		 765 unpacked_lun, tpg->se_tpg_tfo->get_fabric_name(),
766 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 767 spin_unlock(&tpg->tpg_lun_lock);
768 return ERR_PTR(-EINVAL);
769 }
770 spin_unlock(&tpg->tpg_lun_lock);
771
772 return lun;
773}
774
775int core_tpg_post_addlun(
776 struct se_portal_group *tpg,
777 struct se_lun *lun,
778 u32 lun_access,
779 void *lun_ptr)
780{
e3d6f909
AG		 781 int ret;
782
783 ret = core_dev_export(lun_ptr, tpg, lun);
784 if (ret < 0)
785 return ret;
c66ac9db
NB		 786
787 spin_lock(&tpg->tpg_lun_lock);
788 lun->lun_access = lun_access;
789 lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
790 spin_unlock(&tpg->tpg_lun_lock);
791
792 return 0;
793}
794
795static void core_tpg_shutdown_lun(
796 struct se_portal_group *tpg,
797 struct se_lun *lun)
798{
799 core_clear_lun_from_tpg(lun, tpg);
800 transport_clear_lun_from_sessions(lun);
801}
802
803struct se_lun *core_tpg_pre_dellun(
804 struct se_portal_group *tpg,
805 u32 unpacked_lun,
806 int *ret)
807{
808 struct se_lun *lun;
809
810 if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
811 printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
812 "-1: %u for Target Portal Group: %u\n",
e3d6f909 813 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
c66ac9db 814 TRANSPORT_MAX_LUNS_PER_TPG-1,
e3d6f909 815 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 816 return ERR_PTR(-EOVERFLOW);
817 }
818
819 spin_lock(&tpg->tpg_lun_lock);
820 lun = &tpg->tpg_lun_list[unpacked_lun];
821 if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
822 printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
823 " Target Portal Group: %u, ignoring request.\n",
e3d6f909
AG		 824 tpg->se_tpg_tfo->get_fabric_name(), unpacked_lun,
825 tpg->se_tpg_tfo->tpg_get_tag(tpg));
c66ac9db
NB		 826 spin_unlock(&tpg->tpg_lun_lock);
827 return ERR_PTR(-ENODEV);
828 }
829 spin_unlock(&tpg->tpg_lun_lock);
830
831 return lun;
832}
833
834int core_tpg_post_dellun(
835 struct se_portal_group *tpg,
836 struct se_lun *lun)
837{
838 core_tpg_shutdown_lun(tpg, lun);
839
840 core_dev_unexport(lun->lun_se_dev, tpg, lun);
841
842 spin_lock(&tpg->tpg_lun_lock);
843 lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
844 spin_unlock(&tpg->tpg_lun_lock);
845
846 return 0;
847}
kernel source for telekom puls (alcatel/mediatek)