1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * This file contains iSCSI Target Portal Group related functions.
4 *
5 * (c) Copyright 2007-2013 Datera, Inc.
6 *
7 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
8 *
9 ******************************************************************************/
10
11 #include <linux/slab.h>
12 #include <target/target_core_base.h>
13 #include <target/target_core_fabric.h>
14 #include <target/iscsi/iscsi_target_core.h>
15 #include "iscsi_target_erl0.h"
16 #include "iscsi_target_login.h"
17 #include "iscsi_target_nodeattrib.h"
18 #include "iscsi_target_tpg.h"
19 #include "iscsi_target_util.h"
20 #include "iscsi_target.h"
21 #include "iscsi_target_parameters.h"
22
23 #include <target/iscsi/iscsi_transport.h>
24
iscsit_alloc_portal_group(struct iscsi_tiqn * tiqn,u16 tpgt)25 struct iscsi_portal_group *iscsit_alloc_portal_group(struct iscsi_tiqn *tiqn, u16 tpgt)
26 {
27 struct iscsi_portal_group *tpg;
28
29 tpg = kzalloc(sizeof(struct iscsi_portal_group), GFP_KERNEL);
30 if (!tpg) {
31 pr_err("Unable to allocate struct iscsi_portal_group\n");
32 return NULL;
33 }
34
35 tpg->tpgt = tpgt;
36 tpg->tpg_state = TPG_STATE_FREE;
37 tpg->tpg_tiqn = tiqn;
38 INIT_LIST_HEAD(&tpg->tpg_gnp_list);
39 INIT_LIST_HEAD(&tpg->tpg_list);
40 mutex_init(&tpg->tpg_access_lock);
41 sema_init(&tpg->np_login_sem, 1);
42 spin_lock_init(&tpg->tpg_state_lock);
43 spin_lock_init(&tpg->tpg_np_lock);
44
45 return tpg;
46 }
47
48 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *);
49
iscsit_load_discovery_tpg(void)50 int iscsit_load_discovery_tpg(void)
51 {
52 struct iscsi_param *param;
53 struct iscsi_portal_group *tpg;
54 int ret;
55
56 tpg = iscsit_alloc_portal_group(NULL, 1);
57 if (!tpg) {
58 pr_err("Unable to allocate struct iscsi_portal_group\n");
59 return -1;
60 }
61 /*
62 * Save iscsi_ops pointer for special case discovery TPG that
63 * doesn't exist as se_wwn->wwn_group within configfs.
64 */
65 tpg->tpg_se_tpg.se_tpg_tfo = &iscsi_ops;
66 ret = core_tpg_register(NULL, &tpg->tpg_se_tpg, -1);
67 if (ret < 0) {
68 kfree(tpg);
69 return -1;
70 }
71
72 tpg->sid = 1; /* First Assigned LIO Session ID */
73 iscsit_set_default_tpg_attribs(tpg);
74
75 if (iscsi_create_default_params(&tpg->param_list) < 0)
76 goto out;
77 /*
78 * By default we disable authentication for discovery sessions,
79 * this can be changed with:
80 *
81 * /sys/kernel/config/target/iscsi/discovery_auth/enforce_discovery_auth
82 */
83 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
84 if (!param)
85 goto free_pl_out;
86
87 if (iscsi_update_param_value(param, "CHAP,None") < 0)
88 goto free_pl_out;
89
90 tpg->tpg_attrib.authentication = 0;
91
92 spin_lock(&tpg->tpg_state_lock);
93 tpg->tpg_state = TPG_STATE_ACTIVE;
94 spin_unlock(&tpg->tpg_state_lock);
95
96 iscsit_global->discovery_tpg = tpg;
97 pr_debug("CORE[0] - Allocated Discovery TPG\n");
98
99 return 0;
100 free_pl_out:
101 iscsi_release_param_list(tpg->param_list);
102 out:
103 if (tpg->sid == 1)
104 core_tpg_deregister(&tpg->tpg_se_tpg);
105 kfree(tpg);
106 return -1;
107 }
108
iscsit_release_discovery_tpg(void)109 void iscsit_release_discovery_tpg(void)
110 {
111 struct iscsi_portal_group *tpg = iscsit_global->discovery_tpg;
112
113 if (!tpg)
114 return;
115
116 iscsi_release_param_list(tpg->param_list);
117 core_tpg_deregister(&tpg->tpg_se_tpg);
118
119 kfree(tpg);
120 iscsit_global->discovery_tpg = NULL;
121 }
122
iscsit_get_tpg_from_np(struct iscsi_tiqn * tiqn,struct iscsi_np * np,struct iscsi_tpg_np ** tpg_np_out)123 struct iscsi_portal_group *iscsit_get_tpg_from_np(
124 struct iscsi_tiqn *tiqn,
125 struct iscsi_np *np,
126 struct iscsi_tpg_np **tpg_np_out)
127 {
128 struct iscsi_portal_group *tpg = NULL;
129 struct iscsi_tpg_np *tpg_np;
130
131 spin_lock(&tiqn->tiqn_tpg_lock);
132 list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
133
134 spin_lock(&tpg->tpg_state_lock);
135 if (tpg->tpg_state != TPG_STATE_ACTIVE) {
136 spin_unlock(&tpg->tpg_state_lock);
137 continue;
138 }
139 spin_unlock(&tpg->tpg_state_lock);
140
141 spin_lock(&tpg->tpg_np_lock);
142 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
143 if (tpg_np->tpg_np == np) {
144 *tpg_np_out = tpg_np;
145 kref_get(&tpg_np->tpg_np_kref);
146 spin_unlock(&tpg->tpg_np_lock);
147 spin_unlock(&tiqn->tiqn_tpg_lock);
148 return tpg;
149 }
150 }
151 spin_unlock(&tpg->tpg_np_lock);
152 }
153 spin_unlock(&tiqn->tiqn_tpg_lock);
154
155 return NULL;
156 }
157
iscsit_get_tpg(struct iscsi_portal_group * tpg)158 int iscsit_get_tpg(
159 struct iscsi_portal_group *tpg)
160 {
161 return mutex_lock_interruptible(&tpg->tpg_access_lock);
162 }
163
iscsit_put_tpg(struct iscsi_portal_group * tpg)164 void iscsit_put_tpg(struct iscsi_portal_group *tpg)
165 {
166 mutex_unlock(&tpg->tpg_access_lock);
167 }
168
iscsit_clear_tpg_np_login_thread(struct iscsi_tpg_np * tpg_np,struct iscsi_portal_group * tpg,bool shutdown)169 static void iscsit_clear_tpg_np_login_thread(
170 struct iscsi_tpg_np *tpg_np,
171 struct iscsi_portal_group *tpg,
172 bool shutdown)
173 {
174 if (!tpg_np->tpg_np) {
175 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
176 return;
177 }
178
179 if (shutdown)
180 tpg_np->tpg_np->enabled = false;
181 iscsit_reset_np_thread(tpg_np->tpg_np, tpg_np, tpg, shutdown);
182 }
183
iscsit_clear_tpg_np_login_threads(struct iscsi_portal_group * tpg,bool shutdown)184 static void iscsit_clear_tpg_np_login_threads(
185 struct iscsi_portal_group *tpg,
186 bool shutdown)
187 {
188 struct iscsi_tpg_np *tpg_np;
189
190 spin_lock(&tpg->tpg_np_lock);
191 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
192 if (!tpg_np->tpg_np) {
193 pr_err("struct iscsi_tpg_np->tpg_np is NULL!\n");
194 continue;
195 }
196 spin_unlock(&tpg->tpg_np_lock);
197 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, shutdown);
198 spin_lock(&tpg->tpg_np_lock);
199 }
200 spin_unlock(&tpg->tpg_np_lock);
201 }
202
iscsit_tpg_dump_params(struct iscsi_portal_group * tpg)203 void iscsit_tpg_dump_params(struct iscsi_portal_group *tpg)
204 {
205 iscsi_print_params(tpg->param_list);
206 }
207
iscsit_set_default_tpg_attribs(struct iscsi_portal_group * tpg)208 static void iscsit_set_default_tpg_attribs(struct iscsi_portal_group *tpg)
209 {
210 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
211
212 a->authentication = TA_AUTHENTICATION;
213 a->login_timeout = TA_LOGIN_TIMEOUT;
214 a->default_cmdsn_depth = TA_DEFAULT_CMDSN_DEPTH;
215 a->generate_node_acls = TA_GENERATE_NODE_ACLS;
216 a->cache_dynamic_acls = TA_CACHE_DYNAMIC_ACLS;
217 a->demo_mode_write_protect = TA_DEMO_MODE_WRITE_PROTECT;
218 a->prod_mode_write_protect = TA_PROD_MODE_WRITE_PROTECT;
219 a->demo_mode_discovery = TA_DEMO_MODE_DISCOVERY;
220 a->default_erl = TA_DEFAULT_ERL;
221 a->t10_pi = TA_DEFAULT_T10_PI;
222 a->fabric_prot_type = TA_DEFAULT_FABRIC_PROT_TYPE;
223 a->tpg_enabled_sendtargets = TA_DEFAULT_TPG_ENABLED_SENDTARGETS;
224 a->login_keys_workaround = TA_DEFAULT_LOGIN_KEYS_WORKAROUND;
225 }
226
iscsit_tpg_add_portal_group(struct iscsi_tiqn * tiqn,struct iscsi_portal_group * tpg)227 int iscsit_tpg_add_portal_group(struct iscsi_tiqn *tiqn, struct iscsi_portal_group *tpg)
228 {
229 if (tpg->tpg_state != TPG_STATE_FREE) {
230 pr_err("Unable to add iSCSI Target Portal Group: %d"
231 " while not in TPG_STATE_FREE state.\n", tpg->tpgt);
232 return -EEXIST;
233 }
234 iscsit_set_default_tpg_attribs(tpg);
235
236 if (iscsi_create_default_params(&tpg->param_list) < 0)
237 goto err_out;
238
239 tpg->tpg_attrib.tpg = tpg;
240
241 spin_lock(&tpg->tpg_state_lock);
242 tpg->tpg_state = TPG_STATE_INACTIVE;
243 spin_unlock(&tpg->tpg_state_lock);
244
245 spin_lock(&tiqn->tiqn_tpg_lock);
246 list_add_tail(&tpg->tpg_list, &tiqn->tiqn_tpg_list);
247 tiqn->tiqn_ntpgs++;
248 pr_debug("CORE[%s]_TPG[%hu] - Added iSCSI Target Portal Group\n",
249 tiqn->tiqn, tpg->tpgt);
250 spin_unlock(&tiqn->tiqn_tpg_lock);
251
252 return 0;
253 err_out:
254 if (tpg->param_list) {
255 iscsi_release_param_list(tpg->param_list);
256 tpg->param_list = NULL;
257 }
258 return -ENOMEM;
259 }
260
iscsit_tpg_del_portal_group(struct iscsi_tiqn * tiqn,struct iscsi_portal_group * tpg,int force)261 int iscsit_tpg_del_portal_group(
262 struct iscsi_tiqn *tiqn,
263 struct iscsi_portal_group *tpg,
264 int force)
265 {
266 u8 old_state = tpg->tpg_state;
267
268 spin_lock(&tpg->tpg_state_lock);
269 tpg->tpg_state = TPG_STATE_INACTIVE;
270 spin_unlock(&tpg->tpg_state_lock);
271
272 if (iscsit_release_sessions_for_tpg(tpg, force) < 0) {
273 pr_err("Unable to delete iSCSI Target Portal Group:"
274 " %hu while active sessions exist, and force=0\n",
275 tpg->tpgt);
276 tpg->tpg_state = old_state;
277 return -EPERM;
278 }
279
280 if (tpg->param_list) {
281 iscsi_release_param_list(tpg->param_list);
282 tpg->param_list = NULL;
283 }
284
285 core_tpg_deregister(&tpg->tpg_se_tpg);
286
287 spin_lock(&tpg->tpg_state_lock);
288 tpg->tpg_state = TPG_STATE_FREE;
289 spin_unlock(&tpg->tpg_state_lock);
290
291 spin_lock(&tiqn->tiqn_tpg_lock);
292 tiqn->tiqn_ntpgs--;
293 list_del(&tpg->tpg_list);
294 spin_unlock(&tiqn->tiqn_tpg_lock);
295
296 pr_debug("CORE[%s]_TPG[%hu] - Deleted iSCSI Target Portal Group\n",
297 tiqn->tiqn, tpg->tpgt);
298
299 kfree(tpg);
300 return 0;
301 }
302
iscsit_tpg_enable_portal_group(struct iscsi_portal_group * tpg)303 int iscsit_tpg_enable_portal_group(struct iscsi_portal_group *tpg)
304 {
305 struct iscsi_param *param;
306 struct iscsi_tiqn *tiqn = tpg->tpg_tiqn;
307 int ret;
308
309 if (tpg->tpg_state == TPG_STATE_ACTIVE) {
310 pr_err("iSCSI target portal group: %hu is already"
311 " active, ignoring request.\n", tpg->tpgt);
312 return -EINVAL;
313 }
314 /*
315 * Make sure that AuthMethod does not contain None as an option
316 * unless explictly disabled. Set the default to CHAP if authentication
317 * is enforced (as per default), and remove the NONE option.
318 */
319 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
320 if (!param)
321 return -EINVAL;
322
323 if (tpg->tpg_attrib.authentication) {
324 if (!strcmp(param->value, NONE)) {
325 ret = iscsi_update_param_value(param, CHAP);
326 if (ret)
327 goto err;
328 }
329
330 ret = iscsit_ta_authentication(tpg, 1);
331 if (ret < 0)
332 goto err;
333 }
334
335 spin_lock(&tpg->tpg_state_lock);
336 tpg->tpg_state = TPG_STATE_ACTIVE;
337 spin_unlock(&tpg->tpg_state_lock);
338
339 spin_lock(&tiqn->tiqn_tpg_lock);
340 tiqn->tiqn_active_tpgs++;
341 pr_debug("iSCSI_TPG[%hu] - Enabled iSCSI Target Portal Group\n",
342 tpg->tpgt);
343 spin_unlock(&tiqn->tiqn_tpg_lock);
344
345 return 0;
346
347 err:
348 return ret;
349 }
350
iscsit_tpg_disable_portal_group(struct iscsi_portal_group * tpg,int force)351 int 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, false);
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
iscsit_tpg_get_node_attrib(struct iscsit_session * sess)391 struct iscsi_node_attrib *iscsit_tpg_get_node_attrib(
392 struct iscsit_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 = to_iscsi_nacl(se_nacl);
397
398 return &acl->node_attrib;
399 }
400
iscsit_tpg_locate_child_np(struct iscsi_tpg_np * tpg_np,int network_transport)401 struct iscsi_tpg_np *iscsit_tpg_locate_child_np(
402 struct iscsi_tpg_np *tpg_np,
403 int network_transport)
404 {
405 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
406
407 spin_lock(&tpg_np->tpg_np_parent_lock);
408 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
409 &tpg_np->tpg_np_parent_list, tpg_np_child_list) {
410 if (tpg_np_child->tpg_np->np_network_transport ==
411 network_transport) {
412 spin_unlock(&tpg_np->tpg_np_parent_lock);
413 return tpg_np_child;
414 }
415 }
416 spin_unlock(&tpg_np->tpg_np_parent_lock);
417
418 return NULL;
419 }
420
iscsit_tpg_check_network_portal(struct iscsi_tiqn * tiqn,struct sockaddr_storage * sockaddr,int network_transport)421 static bool iscsit_tpg_check_network_portal(
422 struct iscsi_tiqn *tiqn,
423 struct sockaddr_storage *sockaddr,
424 int network_transport)
425 {
426 struct iscsi_portal_group *tpg;
427 struct iscsi_tpg_np *tpg_np;
428 struct iscsi_np *np;
429 bool match = false;
430
431 spin_lock(&tiqn->tiqn_tpg_lock);
432 list_for_each_entry(tpg, &tiqn->tiqn_tpg_list, tpg_list) {
433
434 spin_lock(&tpg->tpg_np_lock);
435 list_for_each_entry(tpg_np, &tpg->tpg_gnp_list, tpg_np_list) {
436 np = tpg_np->tpg_np;
437
438 match = iscsit_check_np_match(sockaddr, np,
439 network_transport);
440 if (match)
441 break;
442 }
443 spin_unlock(&tpg->tpg_np_lock);
444
445 if (match)
446 break;
447 }
448 spin_unlock(&tiqn->tiqn_tpg_lock);
449
450 return match;
451 }
452
iscsit_tpg_add_network_portal(struct iscsi_portal_group * tpg,struct sockaddr_storage * sockaddr,struct iscsi_tpg_np * tpg_np_parent,int network_transport)453 struct iscsi_tpg_np *iscsit_tpg_add_network_portal(
454 struct iscsi_portal_group *tpg,
455 struct sockaddr_storage *sockaddr,
456 struct iscsi_tpg_np *tpg_np_parent,
457 int network_transport)
458 {
459 struct iscsi_np *np;
460 struct iscsi_tpg_np *tpg_np;
461
462 if (!tpg_np_parent) {
463 if (iscsit_tpg_check_network_portal(tpg->tpg_tiqn, sockaddr,
464 network_transport)) {
465 pr_err("Network Portal: %pISc already exists on a"
466 " different TPG on %s\n", sockaddr,
467 tpg->tpg_tiqn->tiqn);
468 return ERR_PTR(-EEXIST);
469 }
470 }
471
472 tpg_np = kzalloc(sizeof(struct iscsi_tpg_np), GFP_KERNEL);
473 if (!tpg_np) {
474 pr_err("Unable to allocate memory for"
475 " struct iscsi_tpg_np.\n");
476 return ERR_PTR(-ENOMEM);
477 }
478
479 np = iscsit_add_np(sockaddr, network_transport);
480 if (IS_ERR(np)) {
481 kfree(tpg_np);
482 return ERR_CAST(np);
483 }
484
485 INIT_LIST_HEAD(&tpg_np->tpg_np_list);
486 INIT_LIST_HEAD(&tpg_np->tpg_np_child_list);
487 INIT_LIST_HEAD(&tpg_np->tpg_np_parent_list);
488 spin_lock_init(&tpg_np->tpg_np_parent_lock);
489 init_completion(&tpg_np->tpg_np_comp);
490 kref_init(&tpg_np->tpg_np_kref);
491 tpg_np->tpg_np = np;
492 tpg_np->tpg = tpg;
493
494 spin_lock(&tpg->tpg_np_lock);
495 list_add_tail(&tpg_np->tpg_np_list, &tpg->tpg_gnp_list);
496 tpg->num_tpg_nps++;
497 if (tpg->tpg_tiqn)
498 tpg->tpg_tiqn->tiqn_num_tpg_nps++;
499 spin_unlock(&tpg->tpg_np_lock);
500
501 if (tpg_np_parent) {
502 tpg_np->tpg_np_parent = tpg_np_parent;
503 spin_lock(&tpg_np_parent->tpg_np_parent_lock);
504 list_add_tail(&tpg_np->tpg_np_child_list,
505 &tpg_np_parent->tpg_np_parent_list);
506 spin_unlock(&tpg_np_parent->tpg_np_parent_lock);
507 }
508
509 pr_debug("CORE[%s] - Added Network Portal: %pISpc,%hu on %s\n",
510 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
511 np->np_transport->name);
512
513 return tpg_np;
514 }
515
iscsit_tpg_release_np(struct iscsi_tpg_np * tpg_np,struct iscsi_portal_group * tpg,struct iscsi_np * np)516 static int iscsit_tpg_release_np(
517 struct iscsi_tpg_np *tpg_np,
518 struct iscsi_portal_group *tpg,
519 struct iscsi_np *np)
520 {
521 iscsit_clear_tpg_np_login_thread(tpg_np, tpg, true);
522
523 pr_debug("CORE[%s] - Removed Network Portal: %pISpc,%hu on %s\n",
524 tpg->tpg_tiqn->tiqn, &np->np_sockaddr, tpg->tpgt,
525 np->np_transport->name);
526
527 tpg_np->tpg_np = NULL;
528 tpg_np->tpg = NULL;
529 kfree(tpg_np);
530 /*
531 * iscsit_del_np() will shutdown struct iscsi_np when last TPG reference is released.
532 */
533 return iscsit_del_np(np);
534 }
535
iscsit_tpg_del_network_portal(struct iscsi_portal_group * tpg,struct iscsi_tpg_np * tpg_np)536 int iscsit_tpg_del_network_portal(
537 struct iscsi_portal_group *tpg,
538 struct iscsi_tpg_np *tpg_np)
539 {
540 struct iscsi_np *np;
541 struct iscsi_tpg_np *tpg_np_child, *tpg_np_child_tmp;
542 int ret = 0;
543
544 np = tpg_np->tpg_np;
545 if (!np) {
546 pr_err("Unable to locate struct iscsi_np from"
547 " struct iscsi_tpg_np\n");
548 return -EINVAL;
549 }
550
551 if (!tpg_np->tpg_np_parent) {
552 /*
553 * We are the parent tpg network portal. Release all of the
554 * child tpg_np's (eg: the non ISCSI_TCP ones) on our parent
555 * list first.
556 */
557 list_for_each_entry_safe(tpg_np_child, tpg_np_child_tmp,
558 &tpg_np->tpg_np_parent_list,
559 tpg_np_child_list) {
560 ret = iscsit_tpg_del_network_portal(tpg, tpg_np_child);
561 if (ret < 0)
562 pr_err("iscsit_tpg_del_network_portal()"
563 " failed: %d\n", ret);
564 }
565 } else {
566 /*
567 * We are not the parent ISCSI_TCP tpg network portal. Release
568 * our own network portals from the child list.
569 */
570 spin_lock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
571 list_del(&tpg_np->tpg_np_child_list);
572 spin_unlock(&tpg_np->tpg_np_parent->tpg_np_parent_lock);
573 }
574
575 spin_lock(&tpg->tpg_np_lock);
576 list_del(&tpg_np->tpg_np_list);
577 tpg->num_tpg_nps--;
578 if (tpg->tpg_tiqn)
579 tpg->tpg_tiqn->tiqn_num_tpg_nps--;
580 spin_unlock(&tpg->tpg_np_lock);
581
582 return iscsit_tpg_release_np(tpg_np, tpg, np);
583 }
584
iscsit_ta_authentication(struct iscsi_portal_group * tpg,u32 authentication)585 int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
586 {
587 unsigned char buf1[256], buf2[256], *none = NULL;
588 int len;
589 struct iscsi_param *param;
590 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
591
592 if ((authentication != 1) && (authentication != 0)) {
593 pr_err("Illegal value for authentication parameter:"
594 " %u, ignoring request.\n", authentication);
595 return -EINVAL;
596 }
597
598 memset(buf1, 0, sizeof(buf1));
599 memset(buf2, 0, sizeof(buf2));
600
601 param = iscsi_find_param_from_key(AUTHMETHOD, tpg->param_list);
602 if (!param)
603 return -EINVAL;
604
605 if (authentication) {
606 snprintf(buf1, sizeof(buf1), "%s", param->value);
607 none = strstr(buf1, NONE);
608 if (!none)
609 goto out;
610 if (!strncmp(none + 4, ",", 1)) {
611 if (!strcmp(buf1, none))
612 sprintf(buf2, "%s", none+5);
613 else {
614 none--;
615 *none = '\0';
616 len = sprintf(buf2, "%s", buf1);
617 none += 5;
618 sprintf(buf2 + len, "%s", none);
619 }
620 } else {
621 none--;
622 *none = '\0';
623 sprintf(buf2, "%s", buf1);
624 }
625 if (iscsi_update_param_value(param, buf2) < 0)
626 return -EINVAL;
627 } else {
628 snprintf(buf1, sizeof(buf1), "%s", param->value);
629 none = strstr(buf1, NONE);
630 if (none)
631 goto out;
632 strlcat(buf1, "," NONE, sizeof(buf1));
633 if (iscsi_update_param_value(param, buf1) < 0)
634 return -EINVAL;
635 }
636
637 out:
638 a->authentication = authentication;
639 pr_debug("%s iSCSI Authentication Methods for TPG: %hu.\n",
640 a->authentication ? "Enforcing" : "Disabling", tpg->tpgt);
641
642 return 0;
643 }
644
iscsit_ta_login_timeout(struct iscsi_portal_group * tpg,u32 login_timeout)645 int iscsit_ta_login_timeout(
646 struct iscsi_portal_group *tpg,
647 u32 login_timeout)
648 {
649 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
650
651 if (login_timeout > TA_LOGIN_TIMEOUT_MAX) {
652 pr_err("Requested Login Timeout %u larger than maximum"
653 " %u\n", login_timeout, TA_LOGIN_TIMEOUT_MAX);
654 return -EINVAL;
655 } else if (login_timeout < TA_LOGIN_TIMEOUT_MIN) {
656 pr_err("Requested Logout Timeout %u smaller than"
657 " minimum %u\n", login_timeout, TA_LOGIN_TIMEOUT_MIN);
658 return -EINVAL;
659 }
660
661 a->login_timeout = login_timeout;
662 pr_debug("Set Logout Timeout to %u for Target Portal Group"
663 " %hu\n", a->login_timeout, tpg->tpgt);
664
665 return 0;
666 }
667
iscsit_ta_generate_node_acls(struct iscsi_portal_group * tpg,u32 flag)668 int iscsit_ta_generate_node_acls(
669 struct iscsi_portal_group *tpg,
670 u32 flag)
671 {
672 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
673
674 if ((flag != 0) && (flag != 1)) {
675 pr_err("Illegal value %d\n", flag);
676 return -EINVAL;
677 }
678
679 a->generate_node_acls = flag;
680 pr_debug("iSCSI_TPG[%hu] - Generate Initiator Portal Group ACLs: %s\n",
681 tpg->tpgt, (a->generate_node_acls) ? "Enabled" : "Disabled");
682
683 if (flag == 1 && a->cache_dynamic_acls == 0) {
684 pr_debug("Explicitly setting cache_dynamic_acls=1 when "
685 "generate_node_acls=1\n");
686 a->cache_dynamic_acls = 1;
687 }
688
689 return 0;
690 }
691
iscsit_ta_default_cmdsn_depth(struct iscsi_portal_group * tpg,u32 tcq_depth)692 int iscsit_ta_default_cmdsn_depth(
693 struct iscsi_portal_group *tpg,
694 u32 tcq_depth)
695 {
696 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
697
698 if (tcq_depth > TA_DEFAULT_CMDSN_DEPTH_MAX) {
699 pr_err("Requested Default Queue Depth: %u larger"
700 " than maximum %u\n", tcq_depth,
701 TA_DEFAULT_CMDSN_DEPTH_MAX);
702 return -EINVAL;
703 } else if (tcq_depth < TA_DEFAULT_CMDSN_DEPTH_MIN) {
704 pr_err("Requested Default Queue Depth: %u smaller"
705 " than minimum %u\n", tcq_depth,
706 TA_DEFAULT_CMDSN_DEPTH_MIN);
707 return -EINVAL;
708 }
709
710 a->default_cmdsn_depth = tcq_depth;
711 pr_debug("iSCSI_TPG[%hu] - Set Default CmdSN TCQ Depth to %u\n",
712 tpg->tpgt, a->default_cmdsn_depth);
713
714 return 0;
715 }
716
iscsit_ta_cache_dynamic_acls(struct iscsi_portal_group * tpg,u32 flag)717 int iscsit_ta_cache_dynamic_acls(
718 struct iscsi_portal_group *tpg,
719 u32 flag)
720 {
721 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
722
723 if ((flag != 0) && (flag != 1)) {
724 pr_err("Illegal value %d\n", flag);
725 return -EINVAL;
726 }
727
728 if (a->generate_node_acls == 1 && flag == 0) {
729 pr_debug("Skipping cache_dynamic_acls=0 when"
730 " generate_node_acls=1\n");
731 return 0;
732 }
733
734 a->cache_dynamic_acls = flag;
735 pr_debug("iSCSI_TPG[%hu] - Cache Dynamic Initiator Portal Group"
736 " ACLs %s\n", tpg->tpgt, (a->cache_dynamic_acls) ?
737 "Enabled" : "Disabled");
738
739 return 0;
740 }
741
iscsit_ta_demo_mode_write_protect(struct iscsi_portal_group * tpg,u32 flag)742 int iscsit_ta_demo_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->demo_mode_write_protect = flag;
754 pr_debug("iSCSI_TPG[%hu] - Demo Mode Write Protect bit: %s\n",
755 tpg->tpgt, (a->demo_mode_write_protect) ? "ON" : "OFF");
756
757 return 0;
758 }
759
iscsit_ta_prod_mode_write_protect(struct iscsi_portal_group * tpg,u32 flag)760 int iscsit_ta_prod_mode_write_protect(
761 struct iscsi_portal_group *tpg,
762 u32 flag)
763 {
764 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
765
766 if ((flag != 0) && (flag != 1)) {
767 pr_err("Illegal value %d\n", flag);
768 return -EINVAL;
769 }
770
771 a->prod_mode_write_protect = flag;
772 pr_debug("iSCSI_TPG[%hu] - Production Mode Write Protect bit:"
773 " %s\n", tpg->tpgt, (a->prod_mode_write_protect) ?
774 "ON" : "OFF");
775
776 return 0;
777 }
778
iscsit_ta_demo_mode_discovery(struct iscsi_portal_group * tpg,u32 flag)779 int iscsit_ta_demo_mode_discovery(
780 struct iscsi_portal_group *tpg,
781 u32 flag)
782 {
783 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
784
785 if ((flag != 0) && (flag != 1)) {
786 pr_err("Illegal value %d\n", flag);
787 return -EINVAL;
788 }
789
790 a->demo_mode_discovery = flag;
791 pr_debug("iSCSI_TPG[%hu] - Demo Mode Discovery bit:"
792 " %s\n", tpg->tpgt, (a->demo_mode_discovery) ?
793 "ON" : "OFF");
794
795 return 0;
796 }
797
iscsit_ta_default_erl(struct iscsi_portal_group * tpg,u32 default_erl)798 int iscsit_ta_default_erl(
799 struct iscsi_portal_group *tpg,
800 u32 default_erl)
801 {
802 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
803
804 if ((default_erl != 0) && (default_erl != 1) && (default_erl != 2)) {
805 pr_err("Illegal value for default_erl: %u\n", default_erl);
806 return -EINVAL;
807 }
808
809 a->default_erl = default_erl;
810 pr_debug("iSCSI_TPG[%hu] - DefaultERL: %u\n", tpg->tpgt, a->default_erl);
811
812 return 0;
813 }
814
iscsit_ta_t10_pi(struct iscsi_portal_group * tpg,u32 flag)815 int iscsit_ta_t10_pi(
816 struct iscsi_portal_group *tpg,
817 u32 flag)
818 {
819 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
820
821 if ((flag != 0) && (flag != 1)) {
822 pr_err("Illegal value %d\n", flag);
823 return -EINVAL;
824 }
825
826 a->t10_pi = flag;
827 pr_debug("iSCSI_TPG[%hu] - T10 Protection information bit:"
828 " %s\n", tpg->tpgt, (a->t10_pi) ?
829 "ON" : "OFF");
830
831 return 0;
832 }
833
iscsit_ta_fabric_prot_type(struct iscsi_portal_group * tpg,u32 prot_type)834 int iscsit_ta_fabric_prot_type(
835 struct iscsi_portal_group *tpg,
836 u32 prot_type)
837 {
838 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
839
840 if ((prot_type != 0) && (prot_type != 1) && (prot_type != 3)) {
841 pr_err("Illegal value for fabric_prot_type: %u\n", prot_type);
842 return -EINVAL;
843 }
844
845 a->fabric_prot_type = prot_type;
846 pr_debug("iSCSI_TPG[%hu] - T10 Fabric Protection Type: %u\n",
847 tpg->tpgt, prot_type);
848
849 return 0;
850 }
851
iscsit_ta_tpg_enabled_sendtargets(struct iscsi_portal_group * tpg,u32 flag)852 int iscsit_ta_tpg_enabled_sendtargets(
853 struct iscsi_portal_group *tpg,
854 u32 flag)
855 {
856 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
857
858 if ((flag != 0) && (flag != 1)) {
859 pr_err("Illegal value %d\n", flag);
860 return -EINVAL;
861 }
862
863 a->tpg_enabled_sendtargets = flag;
864 pr_debug("iSCSI_TPG[%hu] - TPG enabled bit required for SendTargets:"
865 " %s\n", tpg->tpgt, (a->tpg_enabled_sendtargets) ? "ON" : "OFF");
866
867 return 0;
868 }
869
iscsit_ta_login_keys_workaround(struct iscsi_portal_group * tpg,u32 flag)870 int iscsit_ta_login_keys_workaround(
871 struct iscsi_portal_group *tpg,
872 u32 flag)
873 {
874 struct iscsi_tpg_attrib *a = &tpg->tpg_attrib;
875
876 if ((flag != 0) && (flag != 1)) {
877 pr_err("Illegal value %d\n", flag);
878 return -EINVAL;
879 }
880
881 a->login_keys_workaround = flag;
882 pr_debug("iSCSI_TPG[%hu] - TPG enabled bit for login keys workaround: %s ",
883 tpg->tpgt, (a->login_keys_workaround) ? "ON" : "OFF");
884
885 return 0;
886 }
887