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1/*******************************************************************************
2 * This file contains iSCSI Target Portal Group related functions.
3 *
4 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
5 *
6 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
7 *
8 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 ******************************************************************************/
20
21#include <target/target_core_base.h>
22#include <target/target_core_transport.h>
23#include <target/target_core_fabric_ops.h>
24#include <target/target_core_configfs.h>
25#include <target/target_core_tpg.h>
26
27#include "iscsi_target_core.h"
28#include "iscsi_target_erl0.h"
29#include "iscsi_target_login.h"
30#include "iscsi_target_nodeattrib.h"
31#include "iscsi_target_tpg.h"
32#include "iscsi_target_util.h"
33#include "iscsi_target.h"
34#include "iscsi_target_parameters.h"
35
36struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
37{
38 struct iscsi_portal_group *tpg;
39
40 tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
41 if (!tpg) {
42 pr_err("Unable to allocate struct iscsi_portal_group\n");
43 return NULL;
44 }
45
46 tpg->tpgt = tpgt;
47 tpg->tpg_state = TPG_STATE_FREE;
48 tpg->tpg_tiqn = tiqn;
49 INIT_LIST_HEAD(&tpg->tpg_gnp_list);
50 INIT_LIST_HEAD(&tpg->tpg_list);
51 mutex_init(&tpg->tpg_access_lock);
52 mutex_init(&tpg->np_login_lock);
53 spin_lock_init(&tpg->tpg_state_lock);
54 spin_lock_init(&tpg->tpg_np_lock);
55
56 return tpg;
57}
58
59static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
60
61int iscsit_load_discovery_tpg(void)
62{
63 struct iscsi_param *param;
64 struct iscsi_portal_group *tpg;
65 int ret;
66
67 tpg = iscsit_alloc_portal_group(NULL, 1);
68 if (!tpg) {
69 pr_err("Unable to allocate struct iscsi_portal_group\n");
70 return -1;
71 }
72
73 ret = core_tpg_register(
74 &lio_target_fabric_configfs->tf_ops,
75 NULL, &tpg->tpg_se_tpg, (void *)tpg,
76 TRANSPORT_TPG_TYPE_DISCOVERY);
77 if (ret < 0) {
78 kfree(tpg);
79 return -1;
80 }
81
82 tpg->sid = 1; /* First Assigned LIO Session ID */
83 iscsit_set_default_tpg_attribs(tpg);
84
85 if (iscsi_create_default_params(&tpg->param_list) < 0)
86 goto out;
87 /*
88 * By default we disable authentication for discovery sessions,
89 * this can be changed with:
90 *
91 * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
92 */
93 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
94 if (!param)
95 goto out;
96
97 if (iscsi_update_param_value(param, "CHAP,None") < 0)
98 goto out;
99
100 tpg->tpg_attrib.authentication = 0;
101
102 spin_lock(&tpg->tpg_state_lock);
103 tpg->tpg_state = TPG_STATE_ACTIVE;
104 spin_unlock(&tpg->tpg_state_lock);
105
106 iscsit_global->discovery_tpg = tpg;
107 pr_debug("CORE[0] - Allocated Discovery TPG\n");
108
109 return 0;
110out:
111 if (tpg->sid == 1)
112 core_tpg_deregister(&tpg->tpg_se_tpg);
113 kfree(tpg);
114 return -1;
115}
116
117void iscsit_release_discovery_tpg(void)
118{
119 struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
120
121 if (!tpg)
122 return;
123
124 core_tpg_deregister(&tpg->tpg_se_tpg);
125
126 kfree(tpg);
127 iscsit_global->discovery_tpg = NULL;
128}
129
130struct iscsi_portal_group *iscsit_get_tpg_from_np(
131 struct iscsi_tiqn *tiqn,
132 struct iscsi_np *np)
133{
134 struct iscsi_portal_group *tpg = NULL;
135 struct iscsi_tpg_np *tpg_np;
136
137 spin_lock(&tiqn->tiqn_tpg_lock);
138 list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
139
140 spin_lock(&tpg->tpg_state_lock);
141 if (tpg->tpg_state == TPG_STATE_FREE) {
142 spin_unlock(&tpg->tpg_state_lock);
143 continue;
144 }
145 spin_unlock(&tpg->tpg_state_lock);
146
147 spin_lock(&tpg->tpg_np_lock);
148 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
149 if (tpg_np->tpg_np == np) {
150 spin_unlock(&tpg->tpg_np_lock);
151 spin_unlock(&tiqn->tiqn_tpg_lock);
152 return tpg;
153 }
154 }
155 spin_unlock(&tpg->tpg_np_lock);
156 }
157 spin_unlock(&tiqn->tiqn_tpg_lock);
158
159 return NULL;
160}
161
162int iscsit_get_tpg(
163 struct iscsi_portal_group *tpg)
164{
165 int ret;
166
167 ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
168 return ((ret != 0) || signal_pending(current)) ? -1 : 0;
169}
170
171void iscsit_put_tpg(struct iscsi_portal_group *tpg)
172{
173 mutex_unlock(&tpg->tpg_access_lock);
174}
175
176static void iscsit_clear_tpg_np_login_thread(
177 struct iscsi_tpg_np *tpg_np,
178 struct iscsi_portal_group *tpg)
179{
180 if (!tpg_np->tpg_np) {
181 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
182 return;
183 }
184
185 iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg);
186}
187
188void iscsit_clear_tpg_np_login_threads(
189 struct iscsi_portal_group *tpg)
190{
191 struct iscsi_tpg_np *tpg_np;
192
193 spin_lock(&tpg->tpg_np_lock);
194 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
195 if (!tpg_np->tpg_np) {
196 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
197 continue;
198 }
199 spin_unlock(&tpg->tpg_np_lock);
200 iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
201 spin_lock(&tpg->tpg_np_lock);
202 }
203 spin_unlock(&tpg->tpg_np_lock);
204}
205
206void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
207{
208 iscsi_print_params(tpg->param_list);
209}
210
211static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
212{
213 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
214
215 a->authentication = TA_AUTHENTICATION;
216 a->login_timeout = TA_LOGIN_TIMEOUT;
217 a->netif_timeout = TA_NETIF_TIMEOUT;
218 a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
219 a->generate_node_acls = TA_GENERATE_NODE_ACLS;
220 a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
221 a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
222 a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
223}
224
225int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
226{
227 if (tpg->tpg_state != TPG_STATE_FREE) {
228 pr_err("Unable to add iSCSI Target Portal Group: %d"
229 " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
230 return -EEXIST;
231 }
232 iscsit_set_default_tpg_attribs(tpg);
233
234 if (iscsi_create_default_params(&tpg->param_list) < 0)
235 goto err_out;
236
237 ISCSI_TPG_ATTRIB(tpg)->tpg = tpg;
238
239 spin_lock(&tpg->tpg_state_lock);
240 tpg->tpg_state = TPG_STATE_INACTIVE;
241 spin_unlock(&tpg->tpg_state_lock);
242
243 spin_lock(&tiqn->tiqn_tpg_lock);
244 list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
245 tiqn->tiqn_ntpgs++;
246 pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
247 tiqn->tiqn, tpg->tpgt);
248 spin_unlock(&tiqn->tiqn_tpg_lock);
249
250 return 0;
251err_out:
252 if (tpg->param_list) {
253 iscsi_release_param_list(tpg->param_list);
254 tpg->param_list = NULL;
255 }
256 kfree(tpg);
257 return -ENOMEM;
258}
259
260int iscsit_tpg_del_portal_group(
261 struct iscsi_tiqn *tiqn,
262 struct iscsi_portal_group *tpg,
263 int force)
264{
265 u8 old_state = tpg->tpg_state;
266
267 spin_lock(&tpg->tpg_state_lock);
268 tpg->tpg_state = TPG_STATE_INACTIVE;
269 spin_unlock(&tpg->tpg_state_lock);
270
271 if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
272 pr_err("Unable to delete iSCSI Target Portal Group:"
273 " %hu while active sessions exist, and force=0\n",
274 tpg->tpgt);
275 tpg->tpg_state = old_state;
276 return -EPERM;
277 }
278
279 core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
280
281 if (tpg->param_list) {
282 iscsi_release_param_list(tpg->param_list);
283 tpg->param_list = NULL;
284 }
285
286 core_tpg_deregister(&tpg->tpg_se_tpg);
287
288 spin_lock(&tpg->tpg_state_lock);
289 tpg->tpg_state = TPG_STATE_FREE;
290 spin_unlock(&tpg->tpg_state_lock);
291
292 spin_lock(&tiqn->tiqn_tpg_lock);
293 tiqn->tiqn_ntpgs--;
294 list_del(&tpg->tpg_list);
295 spin_unlock(&tiqn->tiqn_tpg_lock);
296
297 pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
298 tiqn->tiqn, tpg->tpgt);
299
300 kfree(tpg);
301 return 0;
302}
303
304int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
305{
306 struct iscsi_param *param;
307 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
308
309 spin_lock(&tpg->tpg_state_lock);
310 if (tpg->tpg_state == TPG_STATE_ACTIVE) {
311 pr_err("iSCSI target portal group: %hu is already"
312 " active, ignoring request.\n", tpg->tpgt);
313 spin_unlock(&tpg->tpg_state_lock);
314 return -EINVAL;
315 }
316 /*
317 * Make sure that AuthMethod does not contain None as an option
318 * unless explictly disabled. Set the default to CHAP if authentication
319 * is enforced (as per default), and remove the NONE option.
320 */
321 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
322 if (!param) {
323 spin_unlock(&tpg->tpg_state_lock);
324 return -ENOMEM;
325 }
326
327 if (ISCSI_TPG_ATTRIB(tpg)->authentication) {
328 if (!strcmp(param->value, NONE))
329 if (iscsi_update_param_value(param, CHAP) < 0) {
330 spin_unlock(&tpg->tpg_state_lock);
331 return -ENOMEM;
332 }
333 if (iscsit_ta_authentication(tpg, 1) < 0) {
334 spin_unlock(&tpg->tpg_state_lock);
335 return -ENOMEM;
336 }
337 }
338
339 tpg->tpg_state = TPG_STATE_ACTIVE;
340 spin_unlock(&tpg->tpg_state_lock);
341
342 spin_lock(&tiqn->tiqn_tpg_lock);
343 tiqn->tiqn_active_tpgs++;
344 pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
345 tpg->tpgt);
346 spin_unlock(&tiqn->tiqn_tpg_lock);
347
348 return 0;
349}
350
351int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
352{
353 struct iscsi_tiqn *tiqn;
354 u8 old_state = tpg->tpg_state;
355
356 spin_lock(&tpg->tpg_state_lock);
357 if (tpg->tpg_state == TPG_STATE_INACTIVE) {
358 pr_err("iSCSI Target Portal Group: %hu is already"
359 " inactive, ignoring request.\n", tpg->tpgt);
360 spin_unlock(&tpg->tpg_state_lock);
361 return -EINVAL;
362 }
363 tpg->tpg_state = TPG_STATE_INACTIVE;
364 spin_unlock(&tpg->tpg_state_lock);
365
366 iscsit_clear_tpg_np_login_threads(tpg);
367
368 if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
369 spin_lock(&tpg->tpg_state_lock);
370 tpg->tpg_state = old_state;
371 spin_unlock(&tpg->tpg_state_lock);
372 pr_err("Unable to disable iSCSI Target Portal Group:"
373 " %hu while active sessions exist, and force=0\n",
374 tpg->tpgt);
375 return -EPERM;
376 }
377
378 tiqn = tpg->tpg_tiqn;
379 if (!tiqn || (tpg == iscsit_global->discovery_tpg))
380 return 0;
381
382 spin_lock(&tiqn->tiqn_tpg_lock);
383 tiqn->tiqn_active_tpgs--;
384 pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
385 tpg->tpgt);
386 spin_unlock(&tiqn->tiqn_tpg_lock);
387
388 return 0;
389}
390
391struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
392 struct iscsi_session *sess)
393{
394 struct se_session *se_sess = sess->se_sess;
395 struct se_node_acl *se_nacl = se_sess->se_node_acl;
396 struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
397 se_node_acl);
398
399 return &acl->node_attrib;
400}
401
402struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
403 struct iscsi_tpg_np *tpg_np,
404 int network_transport)
405{
406 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
407
408 spin_lock(&tpg_np->tpg_np_parent_lock);
409 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
410 &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
411 if (tpg_np_child->tpg_np->np_network_transport ==
412 network_transport) {
413 spin_unlock(&tpg_np->tpg_np_parent_lock);
414 return tpg_np_child;
415 }
416 }
417 spin_unlock(&tpg_np->tpg_np_parent_lock);
418
419 return NULL;
420}
421
422struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
423 struct iscsi_portal_group *tpg,
424 struct __kernel_sockaddr_storage *sockaddr,
425 char *ip_str,
426 struct iscsi_tpg_np *tpg_np_parent,
427 int network_transport)
428{
429 struct iscsi_np *np;
430 struct iscsi_tpg_np *tpg_np;
431
432 tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
433 if (!tpg_np) {
434 pr_err("Unable to allocate memory for"
435 " struct iscsi_tpg_np.\n");
436 return ERR_PTR(-ENOMEM);
437 }
438
439 np = iscsit_add_np(sockaddr, ip_str, network_transport);
440 if (IS_ERR(np)) {
441 kfree(tpg_np);
442 return ERR_CAST(np);
443 }
444
445 INIT_LIST_HEAD(&tpg_np->tpg_np_list);
446 INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
447 INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
448 spin_lock_init(&tpg_np->tpg_np_parent_lock);
449 tpg_np->tpg_np = np;
450 tpg_np->tpg = tpg;
451
452 spin_lock(&tpg->tpg_np_lock);
453 list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
454 tpg->num_tpg_nps++;
455 if (tpg->tpg_tiqn)
456 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
457 spin_unlock(&tpg->tpg_np_lock);
458
459 if (tpg_np_parent) {
460 tpg_np->tpg_np_parent = tpg_np_parent;
461 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
462 list_add_tail(&tpg_np->tpg_np_child_list,
463 &tpg_np_parent->tpg_np_parent_list);
464 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
465 }
466
467 pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
468 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
469 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
470
471 return tpg_np;
472}
473
474static int iscsit_tpg_release_np(
475 struct iscsi_tpg_np *tpg_np,
476 struct iscsi_portal_group *tpg,
477 struct iscsi_np *np)
478{
479 iscsit_clear_tpg_np_login_thread(tpg_np, tpg);
480
481 pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
482 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
483 (np->np_network_transport == ISCSI_TCP) ? "TCP" : "SCTP");
484
485 tpg_np->tpg_np = NULL;
486 tpg_np->tpg = NULL;
487 kfree(tpg_np);
488 /*
489 * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
490 */
491 return iscsit_del_np(np);
492}
493
494int iscsit_tpg_del_network_portal(
495 struct iscsi_portal_group *tpg,
496 struct iscsi_tpg_np *tpg_np)
497{
498 struct iscsi_np *np;
499 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
500 int ret = 0;
501
502 np = tpg_np->tpg_np;
503 if (!np) {
504 pr_err("Unable to locate struct iscsi_np from"
505 " struct iscsi_tpg_np\n");
506 return -EINVAL;
507 }
508
509 if (!tpg_np->tpg_np_parent) {
510 /*
511 * We are the parent tpg network portal. Release all of the
512 * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
513 * list first.
514 */
515 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
516 &tpg_np->tpg_np_parent_list,
517 tpg_np_child_list) {
518 ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
519 if (ret < 0)
520 pr_err("iscsit_tpg_del_network_portal()"
521 " failed: %d\n", ret);
522 }
523 } else {
524 /*
525 * We are not the parent ISCSI_TCP tpg network portal. Release
526 * our own network portals from the child list.
527 */
528 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
529 list_del(&tpg_np->tpg_np_child_list);
530 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
531 }
532
533 spin_lock(&tpg->tpg_np_lock);
534 list_del(&tpg_np->tpg_np_list);
535 tpg->num_tpg_nps--;
536 if (tpg->tpg_tiqn)
537 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
538 spin_unlock(&tpg->tpg_np_lock);
539
540 return iscsit_tpg_release_np(tpg_np, tpg, np);
541}
542
543int iscsit_tpg_set_initiator_node_queue_depth(
544 struct iscsi_portal_group *tpg,
545 unsigned char *initiatorname,
546 u32 queue_depth,
547 int force)
548{
549 return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
550 initiatorname, queue_depth, force);
551}
552
553int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
554{
555 unsigned char buf1[256], buf2[256], *none = NULL;
556 int len;
557 struct iscsi_param *param;
558 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
559
560 if ((authentication != 1) && (authentication != 0)) {
561 pr_err("Illegal value for authentication parameter:"
562 " %u, ignoring request.\n", authentication);
563 return -1;
564 }
565
566 memset(buf1, 0, sizeof(buf1));
567 memset(buf2, 0, sizeof(buf2));
568
569 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
570 if (!param)
571 return -EINVAL;
572
573 if (authentication) {
574 snprintf(buf1, sizeof(buf1), "%s", param->value);
575 none = strstr(buf1, NONE);
576 if (!none)
577 goto out;
578 if (!strncmp(none + 4, ",", 1)) {
579 if (!strcmp(buf1, none))
580 sprintf(buf2, "%s", none+5);
581 else {
582 none--;
583 *none = '\0';
584 len = sprintf(buf2, "%s", buf1);
585 none += 5;
586 sprintf(buf2 + len, "%s", none);
587 }
588 } else {
589 none--;
590 *none = '\0';
591 sprintf(buf2, "%s", buf1);
592 }
593 if (iscsi_update_param_value(param, buf2) < 0)
594 return -EINVAL;
595 } else {
596 snprintf(buf1, sizeof(buf1), "%s", param->value);
597 none = strstr(buf1, NONE);
598 if ((none))
599 goto out;
600 strncat(buf1, ",", strlen(","));
601 strncat(buf1, NONE, strlen(NONE));
602 if (iscsi_update_param_value(param, buf1) < 0)
603 return -EINVAL;
604 }
605
606out:
607 a->authentication = authentication;
608 pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
609 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
610
611 return 0;
612}
613
614int iscsit_ta_login_timeout(
615 struct iscsi_portal_group *tpg,
616 u32 login_timeout)
617{
618 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
619
620 if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
621 pr_err("Requested Login Timeout %u larger than maximum"
622 " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
623 return -EINVAL;
624 } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
625 pr_err("Requested Logout Timeout %u smaller than"
626 " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
627 return -EINVAL;
628 }
629
630 a->login_timeout = login_timeout;
631 pr_debug("Set Logout Timeout to %u for Target Portal Group"
632 " %hu\n", a->login_timeout, tpg->tpgt);
633
634 return 0;
635}
636
637int iscsit_ta_netif_timeout(
638 struct iscsi_portal_group *tpg,
639 u32 netif_timeout)
640{
641 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
642
643 if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
644 pr_err("Requested Network Interface Timeout %u larger"
645 " than maximum %u\n", netif_timeout,
646 TA_NETIF_TIMEOUT_MAX);
647 return -EINVAL;
648 } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
649 pr_err("Requested Network Interface Timeout %u smaller"
650 " than minimum %u\n", netif_timeout,
651 TA_NETIF_TIMEOUT_MIN);
652 return -EINVAL;
653 }
654
655 a->netif_timeout = netif_timeout;
656 pr_debug("Set Network Interface Timeout to %u for"
657 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
658
659 return 0;
660}
661
662int iscsit_ta_generate_node_acls(
663 struct iscsi_portal_group *tpg,
664 u32 flag)
665{
666 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
667
668 if ((flag != 0) && (flag != 1)) {
669 pr_err("Illegal value %d\n", flag);
670 return -EINVAL;
671 }
672
673 a->generate_node_acls = flag;
674 pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
675 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
676
677 return 0;
678}
679
680int iscsit_ta_default_cmdsn_depth(
681 struct iscsi_portal_group *tpg,
682 u32 tcq_depth)
683{
684 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
685
686 if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
687 pr_err("Requested Default Queue Depth: %u larger"
688 " than maximum %u\n", tcq_depth,
689 TA_DEFAULT_CMDSN_DEPTH_MAX);
690 return -EINVAL;
691 } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
692 pr_err("Requested Default Queue Depth: %u smaller"
693 " than minimum %u\n", tcq_depth,
694 TA_DEFAULT_CMDSN_DEPTH_MIN);
695 return -EINVAL;
696 }
697
698 a->default_cmdsn_depth = tcq_depth;
699 pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
700 tpg->tpgt, a->default_cmdsn_depth);
701
702 return 0;
703}
704
705int iscsit_ta_cache_dynamic_acls(
706 struct iscsi_portal_group *tpg,
707 u32 flag)
708{
709 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
710
711 if ((flag != 0) && (flag != 1)) {
712 pr_err("Illegal value %d\n", flag);
713 return -EINVAL;
714 }
715
716 a->cache_dynamic_acls = flag;
717 pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
718 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
719 "Enabled" : "Disabled");
720
721 return 0;
722}
723
724int iscsit_ta_demo_mode_write_protect(
725 struct iscsi_portal_group *tpg,
726 u32 flag)
727{
728 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
729
730 if ((flag != 0) && (flag != 1)) {
731 pr_err("Illegal value %d\n", flag);
732 return -EINVAL;
733 }
734
735 a->demo_mode_write_protect = flag;
736 pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
737 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
738
739 return 0;
740}
741
742int iscsit_ta_prod_mode_write_protect(
743 struct iscsi_portal_group *tpg,
744 u32 flag)
745{
746 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
747
748 if ((flag != 0) && (flag != 1)) {
749 pr_err("Illegal value %d\n", flag);
750 return -EINVAL;
751 }
752
753 a->prod_mode_write_protect = flag;
754 pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
755 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
756 "ON" : "OFF");
757
758 return 0;
759}
1/*******************************************************************************
2 * This file contains iSCSI Target Portal Group related functions.
3 *
4 * (c) Copyright 2007-2013 Datera, Inc.
5 *
6 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 ******************************************************************************/
18
19#include <target/target_core_base.h>
20#include <target/target_core_fabric.h>
21#include <target/target_core_configfs.h>
22
23#include "iscsi_target_core.h"
24#include "iscsi_target_erl0.h"
25#include "iscsi_target_login.h"
26#include "iscsi_target_nodeattrib.h"
27#include "iscsi_target_tpg.h"
28#include "iscsi_target_util.h"
29#include "iscsi_target.h"
30#include "iscsi_target_parameters.h"
31
32#include <target/iscsi/iscsi_transport.h>
33
34struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
35{
36 struct iscsi_portal_group *tpg;
37
38 tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
39 if (!tpg) {
40 pr_err("Unable to allocate struct iscsi_portal_group\n");
41 return NULL;
42 }
43
44 tpg->tpgt = tpgt;
45 tpg->tpg_state = TPG_STATE_FREE;
46 tpg->tpg_tiqn = tiqn;
47 INIT_LIST_HEAD(&tpg->tpg_gnp_list);
48 INIT_LIST_HEAD(&tpg->tpg_list);
49 mutex_init(&tpg->tpg_access_lock);
50 sema_init(&tpg->np_login_sem, 1);
51 spin_lock_init(&tpg->tpg_state_lock);
52 spin_lock_init(&tpg->tpg_np_lock);
53
54 return tpg;
55}
56
57static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
58
59int iscsit_load_discovery_tpg(void)
60{
61 struct iscsi_param *param;
62 struct iscsi_portal_group *tpg;
63 int ret;
64
65 tpg = iscsit_alloc_portal_group(NULL, 1);
66 if (!tpg) {
67 pr_err("Unable to allocate struct iscsi_portal_group\n");
68 return -1;
69 }
70
71 ret = core_tpg_register(
72 &lio_target_fabric_configfs->tf_ops,
73 NULL, &tpg->tpg_se_tpg, tpg,
74 TRANSPORT_TPG_TYPE_DISCOVERY);
75 if (ret < 0) {
76 kfree(tpg);
77 return -1;
78 }
79
80 tpg->sid = 1; /* First Assigned LIO Session ID */
81 iscsit_set_default_tpg_attribs(tpg);
82
83 if (iscsi_create_default_params(&tpg->param_list) < 0)
84 goto out;
85 /*
86 * By default we disable authentication for discovery sessions,
87 * this can be changed with:
88 *
89 * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
90 */
91 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
92 if (!param)
93 goto out;
94
95 if (iscsi_update_param_value(param, "CHAP,None") < 0)
96 goto out;
97
98 tpg->tpg_attrib.authentication = 0;
99
100 spin_lock(&tpg->tpg_state_lock);
101 tpg->tpg_state = TPG_STATE_ACTIVE;
102 spin_unlock(&tpg->tpg_state_lock);
103
104 iscsit_global->discovery_tpg = tpg;
105 pr_debug("CORE[0] - Allocated Discovery TPG\n");
106
107 return 0;
108out:
109 if (tpg->sid == 1)
110 core_tpg_deregister(&tpg->tpg_se_tpg);
111 kfree(tpg);
112 return -1;
113}
114
115void iscsit_release_discovery_tpg(void)
116{
117 struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
118
119 if (!tpg)
120 return;
121
122 core_tpg_deregister(&tpg->tpg_se_tpg);
123
124 kfree(tpg);
125 iscsit_global->discovery_tpg = NULL;
126}
127
128struct iscsi_portal_group *iscsit_get_tpg_from_np(
129 struct iscsi_tiqn *tiqn,
130 struct iscsi_np *np,
131 struct iscsi_tpg_np **tpg_np_out)
132{
133 struct iscsi_portal_group *tpg = NULL;
134 struct iscsi_tpg_np *tpg_np;
135
136 spin_lock(&tiqn->tiqn_tpg_lock);
137 list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
138
139 spin_lock(&tpg->tpg_state_lock);
140 if (tpg->tpg_state != TPG_STATE_ACTIVE) {
141 spin_unlock(&tpg->tpg_state_lock);
142 continue;
143 }
144 spin_unlock(&tpg->tpg_state_lock);
145
146 spin_lock(&tpg->tpg_np_lock);
147 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
148 if (tpg_np->tpg_np == np) {
149 *tpg_np_out = tpg_np;
150 kref_get(&tpg_np->tpg_np_kref);
151 spin_unlock(&tpg->tpg_np_lock);
152 spin_unlock(&tiqn->tiqn_tpg_lock);
153 return tpg;
154 }
155 }
156 spin_unlock(&tpg->tpg_np_lock);
157 }
158 spin_unlock(&tiqn->tiqn_tpg_lock);
159
160 return NULL;
161}
162
163int iscsit_get_tpg(
164 struct iscsi_portal_group *tpg)
165{
166 int ret;
167
168 ret = mutex_lock_interruptible(&tpg->tpg_access_lock);
169 return ((ret != 0) || signal_pending(current)) ? -1 : 0;
170}
171
172void iscsit_put_tpg(struct iscsi_portal_group *tpg)
173{
174 mutex_unlock(&tpg->tpg_access_lock);
175}
176
177static void iscsit_clear_tpg_np_login_thread(
178 struct iscsi_tpg_np *tpg_np,
179 struct iscsi_portal_group *tpg,
180 bool shutdown)
181{
182 if (!tpg_np->tpg_np) {
183 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
184 return;
185 }
186
187 if (shutdown)
188 tpg_np->tpg_np->enabled = false;
189 iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
190}
191
192void iscsit_clear_tpg_np_login_threads(
193 struct iscsi_portal_group *tpg,
194 bool shutdown)
195{
196 struct iscsi_tpg_np *tpg_np;
197
198 spin_lock(&tpg->tpg_np_lock);
199 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
200 if (!tpg_np->tpg_np) {
201 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
202 continue;
203 }
204 spin_unlock(&tpg->tpg_np_lock);
205 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
206 spin_lock(&tpg->tpg_np_lock);
207 }
208 spin_unlock(&tpg->tpg_np_lock);
209}
210
211void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
212{
213 iscsi_print_params(tpg->param_list);
214}
215
216static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
217{
218 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
219
220 a->authentication = TA_AUTHENTICATION;
221 a->login_timeout = TA_LOGIN_TIMEOUT;
222 a->netif_timeout = TA_NETIF_TIMEOUT;
223 a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
224 a->generate_node_acls = TA_GENERATE_NODE_ACLS;
225 a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
226 a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
227 a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
228 a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
229 a->default_erl = TA_DEFAULT_ERL;
230 a->t10_pi = TA_DEFAULT_T10_PI;
231}
232
233int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
234{
235 if (tpg->tpg_state != TPG_STATE_FREE) {
236 pr_err("Unable to add iSCSI Target Portal Group: %d"
237 " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
238 return -EEXIST;
239 }
240 iscsit_set_default_tpg_attribs(tpg);
241
242 if (iscsi_create_default_params(&tpg->param_list) < 0)
243 goto err_out;
244
245 tpg->tpg_attrib.tpg = tpg;
246
247 spin_lock(&tpg->tpg_state_lock);
248 tpg->tpg_state = TPG_STATE_INACTIVE;
249 spin_unlock(&tpg->tpg_state_lock);
250
251 spin_lock(&tiqn->tiqn_tpg_lock);
252 list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
253 tiqn->tiqn_ntpgs++;
254 pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
255 tiqn->tiqn, tpg->tpgt);
256 spin_unlock(&tiqn->tiqn_tpg_lock);
257
258 return 0;
259err_out:
260 if (tpg->param_list) {
261 iscsi_release_param_list(tpg->param_list);
262 tpg->param_list = NULL;
263 }
264 kfree(tpg);
265 return -ENOMEM;
266}
267
268int iscsit_tpg_del_portal_group(
269 struct iscsi_tiqn *tiqn,
270 struct iscsi_portal_group *tpg,
271 int force)
272{
273 u8 old_state = tpg->tpg_state;
274
275 spin_lock(&tpg->tpg_state_lock);
276 tpg->tpg_state = TPG_STATE_INACTIVE;
277 spin_unlock(&tpg->tpg_state_lock);
278
279 iscsit_clear_tpg_np_login_threads(tpg, true);
280
281 if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
282 pr_err("Unable to delete iSCSI Target Portal Group:"
283 " %hu while active sessions exist, and force=0\n",
284 tpg->tpgt);
285 tpg->tpg_state = old_state;
286 return -EPERM;
287 }
288
289 core_tpg_clear_object_luns(&tpg->tpg_se_tpg);
290
291 if (tpg->param_list) {
292 iscsi_release_param_list(tpg->param_list);
293 tpg->param_list = NULL;
294 }
295
296 core_tpg_deregister(&tpg->tpg_se_tpg);
297
298 spin_lock(&tpg->tpg_state_lock);
299 tpg->tpg_state = TPG_STATE_FREE;
300 spin_unlock(&tpg->tpg_state_lock);
301
302 spin_lock(&tiqn->tiqn_tpg_lock);
303 tiqn->tiqn_ntpgs--;
304 list_del(&tpg->tpg_list);
305 spin_unlock(&tiqn->tiqn_tpg_lock);
306
307 pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
308 tiqn->tiqn, tpg->tpgt);
309
310 kfree(tpg);
311 return 0;
312}
313
314int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
315{
316 struct iscsi_param *param;
317 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
318 int ret;
319
320 spin_lock(&tpg->tpg_state_lock);
321 if (tpg->tpg_state == TPG_STATE_ACTIVE) {
322 pr_err("iSCSI target portal group: %hu is already"
323 " active, ignoring request.\n", tpg->tpgt);
324 spin_unlock(&tpg->tpg_state_lock);
325 return -EINVAL;
326 }
327 /*
328 * Make sure that AuthMethod does not contain None as an option
329 * unless explictly disabled. Set the default to CHAP if authentication
330 * is enforced (as per default), and remove the NONE option.
331 */
332 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
333 if (!param) {
334 spin_unlock(&tpg->tpg_state_lock);
335 return -EINVAL;
336 }
337
338 if (tpg->tpg_attrib.authentication) {
339 if (!strcmp(param->value, NONE)) {
340 ret = iscsi_update_param_value(param, CHAP);
341 if (ret)
342 goto err;
343 }
344
345 ret = iscsit_ta_authentication(tpg, 1);
346 if (ret < 0)
347 goto err;
348 }
349
350 tpg->tpg_state = TPG_STATE_ACTIVE;
351 spin_unlock(&tpg->tpg_state_lock);
352
353 spin_lock(&tiqn->tiqn_tpg_lock);
354 tiqn->tiqn_active_tpgs++;
355 pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
356 tpg->tpgt);
357 spin_unlock(&tiqn->tiqn_tpg_lock);
358
359 return 0;
360
361err:
362 spin_unlock(&tpg->tpg_state_lock);
363 return ret;
364}
365
366int iscsit_tpg_disable_portal_group(struct iscsi_portal_group *tpg, int force)
367{
368 struct iscsi_tiqn *tiqn;
369 u8 old_state = tpg->tpg_state;
370
371 spin_lock(&tpg->tpg_state_lock);
372 if (tpg->tpg_state == TPG_STATE_INACTIVE) {
373 pr_err("iSCSI Target Portal Group: %hu is already"
374 " inactive, ignoring request.\n", tpg->tpgt);
375 spin_unlock(&tpg->tpg_state_lock);
376 return -EINVAL;
377 }
378 tpg->tpg_state = TPG_STATE_INACTIVE;
379 spin_unlock(&tpg->tpg_state_lock);
380
381 iscsit_clear_tpg_np_login_threads(tpg, false);
382
383 if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
384 spin_lock(&tpg->tpg_state_lock);
385 tpg->tpg_state = old_state;
386 spin_unlock(&tpg->tpg_state_lock);
387 pr_err("Unable to disable iSCSI Target Portal Group:"
388 " %hu while active sessions exist, and force=0\n",
389 tpg->tpgt);
390 return -EPERM;
391 }
392
393 tiqn = tpg->tpg_tiqn;
394 if (!tiqn || (tpg == iscsit_global->discovery_tpg))
395 return 0;
396
397 spin_lock(&tiqn->tiqn_tpg_lock);
398 tiqn->tiqn_active_tpgs--;
399 pr_debug("iSCSI_TPG[%hu] - Disabled iSCSI Target Portal Group\n",
400 tpg->tpgt);
401 spin_unlock(&tiqn->tiqn_tpg_lock);
402
403 return 0;
404}
405
406struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
407 struct iscsi_session *sess)
408{
409 struct se_session *se_sess = sess->se_sess;
410 struct se_node_acl *se_nacl = se_sess->se_node_acl;
411 struct iscsi_node_acl *acl = container_of(se_nacl, struct iscsi_node_acl,
412 se_node_acl);
413
414 return &acl->node_attrib;
415}
416
417struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
418 struct iscsi_tpg_np *tpg_np,
419 int network_transport)
420{
421 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
422
423 spin_lock(&tpg_np->tpg_np_parent_lock);
424 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
425 &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
426 if (tpg_np_child->tpg_np->np_network_transport ==
427 network_transport) {
428 spin_unlock(&tpg_np->tpg_np_parent_lock);
429 return tpg_np_child;
430 }
431 }
432 spin_unlock(&tpg_np->tpg_np_parent_lock);
433
434 return NULL;
435}
436
437static bool iscsit_tpg_check_network_portal(
438 struct iscsi_tiqn *tiqn,
439 struct __kernel_sockaddr_storage *sockaddr,
440 int network_transport)
441{
442 struct iscsi_portal_group *tpg;
443 struct iscsi_tpg_np *tpg_np;
444 struct iscsi_np *np;
445 bool match = false;
446
447 spin_lock(&tiqn->tiqn_tpg_lock);
448 list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
449
450 spin_lock(&tpg->tpg_np_lock);
451 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
452 np = tpg_np->tpg_np;
453
454 match = iscsit_check_np_match(sockaddr, np,
455 network_transport);
456 if (match == true)
457 break;
458 }
459 spin_unlock(&tpg->tpg_np_lock);
460 }
461 spin_unlock(&tiqn->tiqn_tpg_lock);
462
463 return match;
464}
465
466struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
467 struct iscsi_portal_group *tpg,
468 struct __kernel_sockaddr_storage *sockaddr,
469 char *ip_str,
470 struct iscsi_tpg_np *tpg_np_parent,
471 int network_transport)
472{
473 struct iscsi_np *np;
474 struct iscsi_tpg_np *tpg_np;
475
476 if (!tpg_np_parent) {
477 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
478 network_transport) == true) {
479 pr_err("Network Portal: %s already exists on a"
480 " different TPG on %s\n", ip_str,
481 tpg->tpg_tiqn->tiqn);
482 return ERR_PTR(-EEXIST);
483 }
484 }
485
486 tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
487 if (!tpg_np) {
488 pr_err("Unable to allocate memory for"
489 " struct iscsi_tpg_np.\n");
490 return ERR_PTR(-ENOMEM);
491 }
492
493 np = iscsit_add_np(sockaddr, ip_str, network_transport);
494 if (IS_ERR(np)) {
495 kfree(tpg_np);
496 return ERR_CAST(np);
497 }
498
499 INIT_LIST_HEAD(&tpg_np->tpg_np_list);
500 INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
501 INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
502 spin_lock_init(&tpg_np->tpg_np_parent_lock);
503 init_completion(&tpg_np->tpg_np_comp);
504 kref_init(&tpg_np->tpg_np_kref);
505 tpg_np->tpg_np = np;
506 np->tpg_np = tpg_np;
507 tpg_np->tpg = tpg;
508
509 spin_lock(&tpg->tpg_np_lock);
510 list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
511 tpg->num_tpg_nps++;
512 if (tpg->tpg_tiqn)
513 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
514 spin_unlock(&tpg->tpg_np_lock);
515
516 if (tpg_np_parent) {
517 tpg_np->tpg_np_parent = tpg_np_parent;
518 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
519 list_add_tail(&tpg_np->tpg_np_child_list,
520 &tpg_np_parent->tpg_np_parent_list);
521 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
522 }
523
524 pr_debug("CORE[%s] - Added Network Portal: %s:%hu,%hu on %s\n",
525 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
526 np->np_transport->name);
527
528 return tpg_np;
529}
530
531static int iscsit_tpg_release_np(
532 struct iscsi_tpg_np *tpg_np,
533 struct iscsi_portal_group *tpg,
534 struct iscsi_np *np)
535{
536 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
537
538 pr_debug("CORE[%s] - Removed Network Portal: %s:%hu,%hu on %s\n",
539 tpg->tpg_tiqn->tiqn, np->np_ip, np->np_port, tpg->tpgt,
540 np->np_transport->name);
541
542 tpg_np->tpg_np = NULL;
543 tpg_np->tpg = NULL;
544 kfree(tpg_np);
545 /*
546 * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
547 */
548 return iscsit_del_np(np);
549}
550
551int iscsit_tpg_del_network_portal(
552 struct iscsi_portal_group *tpg,
553 struct iscsi_tpg_np *tpg_np)
554{
555 struct iscsi_np *np;
556 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
557 int ret = 0;
558
559 np = tpg_np->tpg_np;
560 if (!np) {
561 pr_err("Unable to locate struct iscsi_np from"
562 " struct iscsi_tpg_np\n");
563 return -EINVAL;
564 }
565
566 if (!tpg_np->tpg_np_parent) {
567 /*
568 * We are the parent tpg network portal. Release all of the
569 * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
570 * list first.
571 */
572 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
573 &tpg_np->tpg_np_parent_list,
574 tpg_np_child_list) {
575 ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
576 if (ret < 0)
577 pr_err("iscsit_tpg_del_network_portal()"
578 " failed: %d\n", ret);
579 }
580 } else {
581 /*
582 * We are not the parent ISCSI_TCP tpg network portal. Release
583 * our own network portals from the child list.
584 */
585 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
586 list_del(&tpg_np->tpg_np_child_list);
587 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
588 }
589
590 spin_lock(&tpg->tpg_np_lock);
591 list_del(&tpg_np->tpg_np_list);
592 tpg->num_tpg_nps--;
593 if (tpg->tpg_tiqn)
594 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
595 spin_unlock(&tpg->tpg_np_lock);
596
597 return iscsit_tpg_release_np(tpg_np, tpg, np);
598}
599
600int iscsit_tpg_set_initiator_node_queue_depth(
601 struct iscsi_portal_group *tpg,
602 unsigned char *initiatorname,
603 u32 queue_depth,
604 int force)
605{
606 return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
607 initiatorname, queue_depth, force);
608}
609
610int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
611{
612 unsigned char buf1[256], buf2[256], *none = NULL;
613 int len;
614 struct iscsi_param *param;
615 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
616
617 if ((authentication != 1) && (authentication != 0)) {
618 pr_err("Illegal value for authentication parameter:"
619 " %u, ignoring request.\n", authentication);
620 return -EINVAL;
621 }
622
623 memset(buf1, 0, sizeof(buf1));
624 memset(buf2, 0, sizeof(buf2));
625
626 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
627 if (!param)
628 return -EINVAL;
629
630 if (authentication) {
631 snprintf(buf1, sizeof(buf1), "%s", param->value);
632 none = strstr(buf1, NONE);
633 if (!none)
634 goto out;
635 if (!strncmp(none + 4, ",", 1)) {
636 if (!strcmp(buf1, none))
637 sprintf(buf2, "%s", none+5);
638 else {
639 none--;
640 *none = '\0';
641 len = sprintf(buf2, "%s", buf1);
642 none += 5;
643 sprintf(buf2 + len, "%s", none);
644 }
645 } else {
646 none--;
647 *none = '\0';
648 sprintf(buf2, "%s", buf1);
649 }
650 if (iscsi_update_param_value(param, buf2) < 0)
651 return -EINVAL;
652 } else {
653 snprintf(buf1, sizeof(buf1), "%s", param->value);
654 none = strstr(buf1, NONE);
655 if (none)
656 goto out;
657 strncat(buf1, ",", strlen(","));
658 strncat(buf1, NONE, strlen(NONE));
659 if (iscsi_update_param_value(param, buf1) < 0)
660 return -EINVAL;
661 }
662
663out:
664 a->authentication = authentication;
665 pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
666 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
667
668 return 0;
669}
670
671int iscsit_ta_login_timeout(
672 struct iscsi_portal_group *tpg,
673 u32 login_timeout)
674{
675 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
676
677 if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
678 pr_err("Requested Login Timeout %u larger than maximum"
679 " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
680 return -EINVAL;
681 } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
682 pr_err("Requested Logout Timeout %u smaller than"
683 " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
684 return -EINVAL;
685 }
686
687 a->login_timeout = login_timeout;
688 pr_debug("Set Logout Timeout to %u for Target Portal Group"
689 " %hu\n", a->login_timeout, tpg->tpgt);
690
691 return 0;
692}
693
694int iscsit_ta_netif_timeout(
695 struct iscsi_portal_group *tpg,
696 u32 netif_timeout)
697{
698 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
699
700 if (netif_timeout > TA_NETIF_TIMEOUT_MAX) {
701 pr_err("Requested Network Interface Timeout %u larger"
702 " than maximum %u\n", netif_timeout,
703 TA_NETIF_TIMEOUT_MAX);
704 return -EINVAL;
705 } else if (netif_timeout < TA_NETIF_TIMEOUT_MIN) {
706 pr_err("Requested Network Interface Timeout %u smaller"
707 " than minimum %u\n", netif_timeout,
708 TA_NETIF_TIMEOUT_MIN);
709 return -EINVAL;
710 }
711
712 a->netif_timeout = netif_timeout;
713 pr_debug("Set Network Interface Timeout to %u for"
714 " Target Portal Group %hu\n", a->netif_timeout, tpg->tpgt);
715
716 return 0;
717}
718
719int iscsit_ta_generate_node_acls(
720 struct iscsi_portal_group *tpg,
721 u32 flag)
722{
723 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
724
725 if ((flag != 0) && (flag != 1)) {
726 pr_err("Illegal value %d\n", flag);
727 return -EINVAL;
728 }
729
730 a->generate_node_acls = flag;
731 pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
732 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
733
734 if (flag == 1 && a->cache_dynamic_acls == 0) {
735 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
736 "generate_node_acls=1\n");
737 a->cache_dynamic_acls = 1;
738 }
739
740 return 0;
741}
742
743int iscsit_ta_default_cmdsn_depth(
744 struct iscsi_portal_group *tpg,
745 u32 tcq_depth)
746{
747 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
748
749 if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
750 pr_err("Requested Default Queue Depth: %u larger"
751 " than maximum %u\n", tcq_depth,
752 TA_DEFAULT_CMDSN_DEPTH_MAX);
753 return -EINVAL;
754 } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
755 pr_err("Requested Default Queue Depth: %u smaller"
756 " than minimum %u\n", tcq_depth,
757 TA_DEFAULT_CMDSN_DEPTH_MIN);
758 return -EINVAL;
759 }
760
761 a->default_cmdsn_depth = tcq_depth;
762 pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
763 tpg->tpgt, a->default_cmdsn_depth);
764
765 return 0;
766}
767
768int iscsit_ta_cache_dynamic_acls(
769 struct iscsi_portal_group *tpg,
770 u32 flag)
771{
772 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
773
774 if ((flag != 0) && (flag != 1)) {
775 pr_err("Illegal value %d\n", flag);
776 return -EINVAL;
777 }
778
779 if (a->generate_node_acls == 1 && flag == 0) {
780 pr_debug("Skipping cache_dynamic_acls=0 when"
781 " generate_node_acls=1\n");
782 return 0;
783 }
784
785 a->cache_dynamic_acls = flag;
786 pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
787 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
788 "Enabled" : "Disabled");
789
790 return 0;
791}
792
793int iscsit_ta_demo_mode_write_protect(
794 struct iscsi_portal_group *tpg,
795 u32 flag)
796{
797 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
798
799 if ((flag != 0) && (flag != 1)) {
800 pr_err("Illegal value %d\n", flag);
801 return -EINVAL;
802 }
803
804 a->demo_mode_write_protect = flag;
805 pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
806 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
807
808 return 0;
809}
810
811int iscsit_ta_prod_mode_write_protect(
812 struct iscsi_portal_group *tpg,
813 u32 flag)
814{
815 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
816
817 if ((flag != 0) && (flag != 1)) {
818 pr_err("Illegal value %d\n", flag);
819 return -EINVAL;
820 }
821
822 a->prod_mode_write_protect = flag;
823 pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
824 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
825 "ON" : "OFF");
826
827 return 0;
828}
829
830int iscsit_ta_demo_mode_discovery(
831 struct iscsi_portal_group *tpg,
832 u32 flag)
833{
834 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
835
836 if ((flag != 0) && (flag != 1)) {
837 pr_err("Illegal value %d\n", flag);
838 return -EINVAL;
839 }
840
841 a->demo_mode_discovery = flag;
842 pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
843 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
844 "ON" : "OFF");
845
846 return 0;
847}
848
849int iscsit_ta_default_erl(
850 struct iscsi_portal_group *tpg,
851 u32 default_erl)
852{
853 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
854
855 if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
856 pr_err("Illegal value for default_erl: %u\n", default_erl);
857 return -EINVAL;
858 }
859
860 a->default_erl = default_erl;
861 pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
862
863 return 0;
864}
865
866int iscsit_ta_t10_pi(
867 struct iscsi_portal_group *tpg,
868 u32 flag)
869{
870 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
871
872 if ((flag != 0) && (flag != 1)) {
873 pr_err("Illegal value %d\n", flag);
874 return -EINVAL;
875 }
876
877 a->t10_pi = flag;
878 pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
879 " %s\n", tpg->tpgt, (a->t10_pi) ?
880 "ON" : "OFF");
881
882 return 0;
883}