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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*******************************************************************************
3* Filename: target_core_fabric_configfs.c
4 *
5 * This file contains generic fabric module configfs infrastructure for
6 * TCM v4.x code
7 *
8 * (c) Copyright 2010-2013 Datera, Inc.
9 *
10 * Nicholas A. Bellinger <nab@linux-iscsi.org>
11*
12 ****************************************************************************/
13
14#include <linux/kstrtox.h>
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <linux/utsname.h>
18#include <linux/init.h>
19#include <linux/fs.h>
20#include <linux/namei.h>
21#include <linux/slab.h>
22#include <linux/types.h>
23#include <linux/delay.h>
24#include <linux/unistd.h>
25#include <linux/string.h>
26#include <linux/syscalls.h>
27#include <linux/configfs.h>
28
29#include <target/target_core_base.h>
30#include <target/target_core_backend.h>
31#include <target/target_core_fabric.h>
32
33#include "target_core_internal.h"
34#include "target_core_alua.h"
35#include "target_core_pr.h"
36
37#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
38static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
39{ \
40 struct config_item_type *cit = &tf->tf_##_name##_cit; \
41 \
42 cit->ct_item_ops = _item_ops; \
43 cit->ct_group_ops = _group_ops; \
44 cit->ct_attrs = _attrs; \
45 cit->ct_owner = tf->tf_ops->module; \
46 pr_debug("Setup generic %s\n", __stringify(_name)); \
47}
48
49#define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
50static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
51{ \
52 struct config_item_type *cit = &tf->tf_##_name##_cit; \
53 struct configfs_attribute **attrs = tf->tf_ops->tfc_##_name##_attrs; \
54 \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = attrs; \
58 cit->ct_owner = tf->tf_ops->module; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
60}
61
62static struct configfs_item_operations target_fabric_port_item_ops;
63
64/* Start of tfc_tpg_mappedlun_cit */
65
66static int target_fabric_mappedlun_link(
67 struct config_item *lun_acl_ci,
68 struct config_item *lun_ci)
69{
70 struct se_dev_entry *deve;
71 struct se_lun *lun;
72 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
73 struct se_lun_acl, se_lun_group);
74 struct se_portal_group *se_tpg;
75 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
76 bool lun_access_ro;
77
78 if (!lun_ci->ci_type ||
79 lun_ci->ci_type->ct_item_ops != &target_fabric_port_item_ops) {
80 pr_err("Bad lun_ci, not a valid lun_ci pointer: %p\n", lun_ci);
81 return -EFAULT;
82 }
83 lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
84
85 /*
86 * Ensure that the source port exists
87 */
88 if (!lun->lun_se_dev) {
89 pr_err("Source se_lun->lun_se_dev does not exist\n");
90 return -EINVAL;
91 }
92 if (lun->lun_shutdown) {
93 pr_err("Unable to create mappedlun symlink because"
94 " lun->lun_shutdown=true\n");
95 return -EINVAL;
96 }
97 se_tpg = lun->lun_tpg;
98
99 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
100 tpg_ci = &nacl_ci->ci_group->cg_item;
101 wwn_ci = &tpg_ci->ci_group->cg_item;
102 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
103 wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
104 /*
105 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
106 */
107 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
108 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
109 config_item_name(wwn_ci));
110 return -EINVAL;
111 }
112 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
113 pr_err("Illegal Initiator ACL Symlink outside of %s"
114 " TPGT: %s\n", config_item_name(wwn_ci),
115 config_item_name(tpg_ci));
116 return -EINVAL;
117 }
118 /*
119 * If this struct se_node_acl was dynamically generated with
120 * tpg_1/attrib/generate_node_acls=1, use the existing
121 * deve->lun_access_ro value, which will be true when
122 * tpg_1/attrib/demo_mode_write_protect=1
123 */
124 rcu_read_lock();
125 deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun);
126 if (deve)
127 lun_access_ro = deve->lun_access_ro;
128 else
129 lun_access_ro =
130 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
131 se_tpg)) ? true : false;
132 rcu_read_unlock();
133 /*
134 * Determine the actual mapped LUN value user wants..
135 *
136 * This value is what the SCSI Initiator actually sees the
137 * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
138 */
139 return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access_ro);
140}
141
142static void target_fabric_mappedlun_unlink(
143 struct config_item *lun_acl_ci,
144 struct config_item *lun_ci)
145{
146 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
147 struct se_lun_acl, se_lun_group);
148 struct se_lun *lun = container_of(to_config_group(lun_ci),
149 struct se_lun, lun_group);
150
151 core_dev_del_initiator_node_lun_acl(lun, lacl);
152}
153
154static struct se_lun_acl *item_to_lun_acl(struct config_item *item)
155{
156 return container_of(to_config_group(item), struct se_lun_acl,
157 se_lun_group);
158}
159
160static ssize_t target_fabric_mappedlun_write_protect_show(
161 struct config_item *item, char *page)
162{
163 struct se_lun_acl *lacl = item_to_lun_acl(item);
164 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
165 struct se_dev_entry *deve;
166 ssize_t len = 0;
167
168 rcu_read_lock();
169 deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun);
170 if (deve) {
171 len = sprintf(page, "%d\n", deve->lun_access_ro);
172 }
173 rcu_read_unlock();
174
175 return len;
176}
177
178static ssize_t target_fabric_mappedlun_write_protect_store(
179 struct config_item *item, const char *page, size_t count)
180{
181 struct se_lun_acl *lacl = item_to_lun_acl(item);
182 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
183 struct se_portal_group *se_tpg = se_nacl->se_tpg;
184 unsigned long wp;
185 int ret;
186
187 ret = kstrtoul(page, 0, &wp);
188 if (ret)
189 return ret;
190
191 if ((wp != 1) && (wp != 0))
192 return -EINVAL;
193
194 /* wp=1 means lun_access_ro=true */
195 core_update_device_list_access(lacl->mapped_lun, wp, lacl->se_lun_nacl);
196
197 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
198 " Mapped LUN: %llu Write Protect bit to %s\n",
199 se_tpg->se_tpg_tfo->fabric_name,
200 se_nacl->initiatorname, lacl->mapped_lun, (wp) ? "ON" : "OFF");
201
202 return count;
203
204}
205
206CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect);
207
208static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
209 &target_fabric_mappedlun_attr_write_protect,
210 NULL,
211};
212
213static void target_fabric_mappedlun_release(struct config_item *item)
214{
215 struct se_lun_acl *lacl = container_of(to_config_group(item),
216 struct se_lun_acl, se_lun_group);
217 struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
218
219 core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
220}
221
222static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
223 .release = target_fabric_mappedlun_release,
224 .allow_link = target_fabric_mappedlun_link,
225 .drop_link = target_fabric_mappedlun_unlink,
226};
227
228TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
229 target_fabric_mappedlun_attrs);
230
231/* End of tfc_tpg_mappedlun_cit */
232
233/* Start of tfc_tpg_mappedlun_port_cit */
234
235static struct config_group *target_core_mappedlun_stat_mkdir(
236 struct config_group *group,
237 const char *name)
238{
239 return ERR_PTR(-ENOSYS);
240}
241
242static void target_core_mappedlun_stat_rmdir(
243 struct config_group *group,
244 struct config_item *item)
245{
246 return;
247}
248
249static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
250 .make_group = target_core_mappedlun_stat_mkdir,
251 .drop_item = target_core_mappedlun_stat_rmdir,
252};
253
254TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
255 NULL);
256
257/* End of tfc_tpg_mappedlun_port_cit */
258
259TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL);
260TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL);
261TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL);
262
263/* Start of tfc_tpg_nacl_base_cit */
264
265static struct config_group *target_fabric_make_mappedlun(
266 struct config_group *group,
267 const char *name)
268{
269 struct se_node_acl *se_nacl = container_of(group,
270 struct se_node_acl, acl_group);
271 struct se_portal_group *se_tpg = se_nacl->se_tpg;
272 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
273 struct se_lun_acl *lacl = NULL;
274 char *buf;
275 unsigned long long mapped_lun;
276 int ret = 0;
277
278 buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
279 if (!buf) {
280 pr_err("Unable to allocate memory for name buf\n");
281 return ERR_PTR(-ENOMEM);
282 }
283 snprintf(buf, strlen(name) + 1, "%s", name);
284 /*
285 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
286 */
287 if (strstr(buf, "lun_") != buf) {
288 pr_err("Unable to locate \"lun_\" from buf: %s"
289 " name: %s\n", buf, name);
290 ret = -EINVAL;
291 goto out;
292 }
293 /*
294 * Determine the Mapped LUN value. This is what the SCSI Initiator
295 * Port will actually see.
296 */
297 ret = kstrtoull(buf + 4, 0, &mapped_lun);
298 if (ret)
299 goto out;
300
301 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
302 mapped_lun, &ret);
303 if (!lacl) {
304 ret = -EINVAL;
305 goto out;
306 }
307
308 config_group_init_type_name(&lacl->se_lun_group, name,
309 &tf->tf_tpg_mappedlun_cit);
310
311 config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
312 "statistics", &tf->tf_tpg_mappedlun_stat_cit);
313 configfs_add_default_group(&lacl->ml_stat_grps.stat_group,
314 &lacl->se_lun_group);
315
316 target_stat_setup_mappedlun_default_groups(lacl);
317
318 kfree(buf);
319 return &lacl->se_lun_group;
320out:
321 kfree(lacl);
322 kfree(buf);
323 return ERR_PTR(ret);
324}
325
326static void target_fabric_drop_mappedlun(
327 struct config_group *group,
328 struct config_item *item)
329{
330 struct se_lun_acl *lacl = container_of(to_config_group(item),
331 struct se_lun_acl, se_lun_group);
332
333 configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group);
334 configfs_remove_default_groups(&lacl->se_lun_group);
335
336 config_item_put(item);
337}
338
339static void target_fabric_nacl_base_release(struct config_item *item)
340{
341 struct se_node_acl *se_nacl = container_of(to_config_group(item),
342 struct se_node_acl, acl_group);
343
344 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group);
345 core_tpg_del_initiator_node_acl(se_nacl);
346}
347
348static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
349 .release = target_fabric_nacl_base_release,
350};
351
352static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
353 .make_group = target_fabric_make_mappedlun,
354 .drop_item = target_fabric_drop_mappedlun,
355};
356
357TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
358 &target_fabric_nacl_base_group_ops);
359
360/* End of tfc_tpg_nacl_base_cit */
361
362/* Start of tfc_node_fabric_stats_cit */
363/*
364 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
365 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
366 */
367TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
368
369/* End of tfc_wwn_fabric_stats_cit */
370
371/* Start of tfc_tpg_nacl_cit */
372
373static struct config_group *target_fabric_make_nodeacl(
374 struct config_group *group,
375 const char *name)
376{
377 struct se_portal_group *se_tpg = container_of(group,
378 struct se_portal_group, tpg_acl_group);
379 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
380 struct se_node_acl *se_nacl;
381
382 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name);
383 if (IS_ERR(se_nacl))
384 return ERR_CAST(se_nacl);
385
386 config_group_init_type_name(&se_nacl->acl_group, name,
387 &tf->tf_tpg_nacl_base_cit);
388
389 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
390 &tf->tf_tpg_nacl_attrib_cit);
391 configfs_add_default_group(&se_nacl->acl_attrib_group,
392 &se_nacl->acl_group);
393
394 config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
395 &tf->tf_tpg_nacl_auth_cit);
396 configfs_add_default_group(&se_nacl->acl_auth_group,
397 &se_nacl->acl_group);
398
399 config_group_init_type_name(&se_nacl->acl_param_group, "param",
400 &tf->tf_tpg_nacl_param_cit);
401 configfs_add_default_group(&se_nacl->acl_param_group,
402 &se_nacl->acl_group);
403
404 config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
405 "fabric_statistics", &tf->tf_tpg_nacl_stat_cit);
406 configfs_add_default_group(&se_nacl->acl_fabric_stat_group,
407 &se_nacl->acl_group);
408
409 if (tf->tf_ops->fabric_init_nodeacl) {
410 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name);
411 if (ret) {
412 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group);
413 core_tpg_del_initiator_node_acl(se_nacl);
414 return ERR_PTR(ret);
415 }
416 }
417
418 return &se_nacl->acl_group;
419}
420
421static void target_fabric_drop_nodeacl(
422 struct config_group *group,
423 struct config_item *item)
424{
425 struct se_node_acl *se_nacl = container_of(to_config_group(item),
426 struct se_node_acl, acl_group);
427
428 configfs_remove_default_groups(&se_nacl->acl_group);
429
430 /*
431 * struct se_node_acl free is done in target_fabric_nacl_base_release()
432 */
433 config_item_put(item);
434}
435
436static struct configfs_group_operations target_fabric_nacl_group_ops = {
437 .make_group = target_fabric_make_nodeacl,
438 .drop_item = target_fabric_drop_nodeacl,
439};
440
441TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
442
443/* End of tfc_tpg_nacl_cit */
444
445/* Start of tfc_tpg_np_base_cit */
446
447static void target_fabric_np_base_release(struct config_item *item)
448{
449 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
450 struct se_tpg_np, tpg_np_group);
451 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
452 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
453
454 tf->tf_ops->fabric_drop_np(se_tpg_np);
455}
456
457static struct configfs_item_operations target_fabric_np_base_item_ops = {
458 .release = target_fabric_np_base_release,
459};
460
461TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL);
462
463/* End of tfc_tpg_np_base_cit */
464
465/* Start of tfc_tpg_np_cit */
466
467static struct config_group *target_fabric_make_np(
468 struct config_group *group,
469 const char *name)
470{
471 struct se_portal_group *se_tpg = container_of(group,
472 struct se_portal_group, tpg_np_group);
473 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
474 struct se_tpg_np *se_tpg_np;
475
476 if (!tf->tf_ops->fabric_make_np) {
477 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
478 return ERR_PTR(-ENOSYS);
479 }
480
481 se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name);
482 if (!se_tpg_np || IS_ERR(se_tpg_np))
483 return ERR_PTR(-EINVAL);
484
485 se_tpg_np->tpg_np_parent = se_tpg;
486 config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
487 &tf->tf_tpg_np_base_cit);
488
489 return &se_tpg_np->tpg_np_group;
490}
491
492static void target_fabric_drop_np(
493 struct config_group *group,
494 struct config_item *item)
495{
496 /*
497 * struct se_tpg_np is released via target_fabric_np_base_release()
498 */
499 config_item_put(item);
500}
501
502static struct configfs_group_operations target_fabric_np_group_ops = {
503 .make_group = &target_fabric_make_np,
504 .drop_item = &target_fabric_drop_np,
505};
506
507TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
508
509/* End of tfc_tpg_np_cit */
510
511/* Start of tfc_tpg_port_cit */
512
513static struct se_lun *item_to_lun(struct config_item *item)
514{
515 return container_of(to_config_group(item), struct se_lun,
516 lun_group);
517}
518
519static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item,
520 char *page)
521{
522 struct se_lun *lun = item_to_lun(item);
523
524 if (!lun->lun_se_dev)
525 return -ENODEV;
526
527 return core_alua_show_tg_pt_gp_info(lun, page);
528}
529
530static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item,
531 const char *page, size_t count)
532{
533 struct se_lun *lun = item_to_lun(item);
534
535 if (!lun->lun_se_dev)
536 return -ENODEV;
537
538 return core_alua_store_tg_pt_gp_info(lun, page, count);
539}
540
541static ssize_t target_fabric_port_alua_tg_pt_offline_show(
542 struct config_item *item, char *page)
543{
544 struct se_lun *lun = item_to_lun(item);
545
546 if (!lun->lun_se_dev)
547 return -ENODEV;
548
549 return core_alua_show_offline_bit(lun, page);
550}
551
552static ssize_t target_fabric_port_alua_tg_pt_offline_store(
553 struct config_item *item, const char *page, size_t count)
554{
555 struct se_lun *lun = item_to_lun(item);
556
557 if (!lun->lun_se_dev)
558 return -ENODEV;
559
560 return core_alua_store_offline_bit(lun, page, count);
561}
562
563static ssize_t target_fabric_port_alua_tg_pt_status_show(
564 struct config_item *item, char *page)
565{
566 struct se_lun *lun = item_to_lun(item);
567
568 if (!lun->lun_se_dev)
569 return -ENODEV;
570
571 return core_alua_show_secondary_status(lun, page);
572}
573
574static ssize_t target_fabric_port_alua_tg_pt_status_store(
575 struct config_item *item, const char *page, size_t count)
576{
577 struct se_lun *lun = item_to_lun(item);
578
579 if (!lun->lun_se_dev)
580 return -ENODEV;
581
582 return core_alua_store_secondary_status(lun, page, count);
583}
584
585static ssize_t target_fabric_port_alua_tg_pt_write_md_show(
586 struct config_item *item, char *page)
587{
588 struct se_lun *lun = item_to_lun(item);
589
590 if (!lun->lun_se_dev)
591 return -ENODEV;
592
593 return core_alua_show_secondary_write_metadata(lun, page);
594}
595
596static ssize_t target_fabric_port_alua_tg_pt_write_md_store(
597 struct config_item *item, const char *page, size_t count)
598{
599 struct se_lun *lun = item_to_lun(item);
600
601 if (!lun->lun_se_dev)
602 return -ENODEV;
603
604 return core_alua_store_secondary_write_metadata(lun, page, count);
605}
606
607CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp);
608CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline);
609CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status);
610CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md);
611
612static struct configfs_attribute *target_fabric_port_attrs[] = {
613 &target_fabric_port_attr_alua_tg_pt_gp,
614 &target_fabric_port_attr_alua_tg_pt_offline,
615 &target_fabric_port_attr_alua_tg_pt_status,
616 &target_fabric_port_attr_alua_tg_pt_write_md,
617 NULL,
618};
619
620static int target_fabric_port_link(
621 struct config_item *lun_ci,
622 struct config_item *se_dev_ci)
623{
624 struct config_item *tpg_ci;
625 struct se_lun *lun = container_of(to_config_group(lun_ci),
626 struct se_lun, lun_group);
627 struct se_portal_group *se_tpg;
628 struct se_device *dev;
629 struct target_fabric_configfs *tf;
630 int ret;
631
632 if (!se_dev_ci->ci_type ||
633 se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) {
634 pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci);
635 return -EFAULT;
636 }
637 dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
638
639 if (!target_dev_configured(dev)) {
640 pr_err("se_device not configured yet, cannot port link\n");
641 return -ENODEV;
642 }
643
644 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
645 se_tpg = container_of(to_config_group(tpg_ci),
646 struct se_portal_group, tpg_group);
647 tf = se_tpg->se_tpg_wwn->wwn_tf;
648
649 if (lun->lun_se_dev != NULL) {
650 pr_err("Port Symlink already exists\n");
651 return -EEXIST;
652 }
653
654 ret = core_dev_add_lun(se_tpg, dev, lun);
655 if (ret) {
656 pr_err("core_dev_add_lun() failed: %d\n", ret);
657 goto out;
658 }
659
660 if (tf->tf_ops->fabric_post_link) {
661 /*
662 * Call the optional fabric_post_link() to allow a
663 * fabric module to setup any additional state once
664 * core_dev_add_lun() has been called..
665 */
666 tf->tf_ops->fabric_post_link(se_tpg, lun);
667 }
668
669 return 0;
670out:
671 return ret;
672}
673
674static void target_fabric_port_unlink(
675 struct config_item *lun_ci,
676 struct config_item *se_dev_ci)
677{
678 struct se_lun *lun = container_of(to_config_group(lun_ci),
679 struct se_lun, lun_group);
680 struct se_portal_group *se_tpg = lun->lun_tpg;
681 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
682
683 if (tf->tf_ops->fabric_pre_unlink) {
684 /*
685 * Call the optional fabric_pre_unlink() to allow a
686 * fabric module to release any additional stat before
687 * core_dev_del_lun() is called.
688 */
689 tf->tf_ops->fabric_pre_unlink(se_tpg, lun);
690 }
691
692 core_dev_del_lun(se_tpg, lun);
693}
694
695static void target_fabric_port_release(struct config_item *item)
696{
697 struct se_lun *lun = container_of(to_config_group(item),
698 struct se_lun, lun_group);
699
700 kfree_rcu(lun, rcu_head);
701}
702
703static struct configfs_item_operations target_fabric_port_item_ops = {
704 .release = target_fabric_port_release,
705 .allow_link = target_fabric_port_link,
706 .drop_link = target_fabric_port_unlink,
707};
708
709TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
710
711/* End of tfc_tpg_port_cit */
712
713/* Start of tfc_tpg_port_stat_cit */
714
715static struct config_group *target_core_port_stat_mkdir(
716 struct config_group *group,
717 const char *name)
718{
719 return ERR_PTR(-ENOSYS);
720}
721
722static void target_core_port_stat_rmdir(
723 struct config_group *group,
724 struct config_item *item)
725{
726 return;
727}
728
729static struct configfs_group_operations target_fabric_port_stat_group_ops = {
730 .make_group = target_core_port_stat_mkdir,
731 .drop_item = target_core_port_stat_rmdir,
732};
733
734TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
735
736/* End of tfc_tpg_port_stat_cit */
737
738/* Start of tfc_tpg_lun_cit */
739
740static struct config_group *target_fabric_make_lun(
741 struct config_group *group,
742 const char *name)
743{
744 struct se_lun *lun;
745 struct se_portal_group *se_tpg = container_of(group,
746 struct se_portal_group, tpg_lun_group);
747 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
748 unsigned long long unpacked_lun;
749 int errno;
750
751 if (strstr(name, "lun_") != name) {
752 pr_err("Unable to locate \'_\" in"
753 " \"lun_$LUN_NUMBER\"\n");
754 return ERR_PTR(-EINVAL);
755 }
756 errno = kstrtoull(name + 4, 0, &unpacked_lun);
757 if (errno)
758 return ERR_PTR(errno);
759
760 lun = core_tpg_alloc_lun(se_tpg, unpacked_lun);
761 if (IS_ERR(lun))
762 return ERR_CAST(lun);
763
764 config_group_init_type_name(&lun->lun_group, name,
765 &tf->tf_tpg_port_cit);
766
767 config_group_init_type_name(&lun->port_stat_grps.stat_group,
768 "statistics", &tf->tf_tpg_port_stat_cit);
769 configfs_add_default_group(&lun->port_stat_grps.stat_group,
770 &lun->lun_group);
771
772 target_stat_setup_port_default_groups(lun);
773
774 return &lun->lun_group;
775}
776
777static void target_fabric_drop_lun(
778 struct config_group *group,
779 struct config_item *item)
780{
781 struct se_lun *lun = container_of(to_config_group(item),
782 struct se_lun, lun_group);
783
784 configfs_remove_default_groups(&lun->port_stat_grps.stat_group);
785 configfs_remove_default_groups(&lun->lun_group);
786
787 config_item_put(item);
788}
789
790static struct configfs_group_operations target_fabric_lun_group_ops = {
791 .make_group = &target_fabric_make_lun,
792 .drop_item = &target_fabric_drop_lun,
793};
794
795TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
796
797/* End of tfc_tpg_lun_cit */
798
799TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL);
800TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL);
801TF_CIT_SETUP_DRV(tpg_param, NULL, NULL);
802
803/* Start of tfc_tpg_base_cit */
804
805static void target_fabric_tpg_release(struct config_item *item)
806{
807 struct se_portal_group *se_tpg = container_of(to_config_group(item),
808 struct se_portal_group, tpg_group);
809 struct se_wwn *wwn = se_tpg->se_tpg_wwn;
810 struct target_fabric_configfs *tf = wwn->wwn_tf;
811
812 tf->tf_ops->fabric_drop_tpg(se_tpg);
813}
814
815static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
816 .release = target_fabric_tpg_release,
817};
818
819static ssize_t target_fabric_tpg_base_enable_show(struct config_item *item,
820 char *page)
821{
822 return sysfs_emit(page, "%d\n", to_tpg(item)->enabled);
823}
824
825static ssize_t target_fabric_tpg_base_enable_store(struct config_item *item,
826 const char *page,
827 size_t count)
828{
829 struct se_portal_group *se_tpg = to_tpg(item);
830 int ret;
831 bool op;
832
833 ret = kstrtobool(page, &op);
834 if (ret)
835 return ret;
836
837 if (se_tpg->enabled == op)
838 return count;
839 if (op)
840 ret = target_tpg_enable(se_tpg);
841 else
842 ret = target_tpg_disable(se_tpg);
843 if (ret)
844 return ret;
845 return count;
846}
847static ssize_t target_fabric_tpg_base_rtpi_show(struct config_item *item, char *page)
848{
849 struct se_portal_group *se_tpg = to_tpg(item);
850
851 return sysfs_emit(page, "%#x\n", se_tpg->tpg_rtpi);
852}
853
854static ssize_t target_fabric_tpg_base_rtpi_store(struct config_item *item,
855 const char *page, size_t count)
856{
857 struct se_portal_group *se_tpg = to_tpg(item);
858 u16 val;
859 int ret;
860
861 ret = kstrtou16(page, 0, &val);
862 if (ret < 0)
863 return ret;
864 if (val == 0)
865 return -EINVAL;
866
867 if (se_tpg->enabled) {
868 pr_info("%s_TPG[%hu] - Can not change RTPI on enabled TPG",
869 se_tpg->se_tpg_tfo->fabric_name,
870 se_tpg->se_tpg_tfo->tpg_get_tag(se_tpg));
871 return -EINVAL;
872 }
873
874 se_tpg->tpg_rtpi = val;
875 se_tpg->rtpi_manual = true;
876
877 return count;
878}
879
880CONFIGFS_ATTR(target_fabric_tpg_base_, enable);
881CONFIGFS_ATTR(target_fabric_tpg_base_, rtpi);
882
883static int
884target_fabric_setup_tpg_base_cit(struct target_fabric_configfs *tf)
885{
886 struct config_item_type *cit = &tf->tf_tpg_base_cit;
887 struct configfs_attribute **attrs = NULL;
888 size_t nr_attrs = 0;
889 int i = 0;
890
891 if (tf->tf_ops->tfc_tpg_base_attrs)
892 while (tf->tf_ops->tfc_tpg_base_attrs[nr_attrs] != NULL)
893 nr_attrs++;
894
895 if (tf->tf_ops->fabric_enable_tpg)
896 nr_attrs++;
897
898 /* + 1 for target_fabric_tpg_base_attr_rtpi */
899 nr_attrs++;
900
901 /* + 1 for final NULL in the array */
902 attrs = kcalloc(nr_attrs + 1, sizeof(*attrs), GFP_KERNEL);
903 if (!attrs)
904 return -ENOMEM;
905
906 if (tf->tf_ops->tfc_tpg_base_attrs)
907 for (; tf->tf_ops->tfc_tpg_base_attrs[i] != NULL; i++)
908 attrs[i] = tf->tf_ops->tfc_tpg_base_attrs[i];
909
910 if (tf->tf_ops->fabric_enable_tpg)
911 attrs[i++] = &target_fabric_tpg_base_attr_enable;
912
913 attrs[i++] = &target_fabric_tpg_base_attr_rtpi;
914
915 cit->ct_item_ops = &target_fabric_tpg_base_item_ops;
916 cit->ct_attrs = attrs;
917 cit->ct_owner = tf->tf_ops->module;
918 pr_debug("Setup generic tpg_base\n");
919
920 return 0;
921}
922/* End of tfc_tpg_base_cit */
923
924/* Start of tfc_tpg_cit */
925
926static struct config_group *target_fabric_make_tpg(
927 struct config_group *group,
928 const char *name)
929{
930 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
931 struct target_fabric_configfs *tf = wwn->wwn_tf;
932 struct se_portal_group *se_tpg;
933
934 if (!tf->tf_ops->fabric_make_tpg) {
935 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n");
936 return ERR_PTR(-ENOSYS);
937 }
938
939 se_tpg = tf->tf_ops->fabric_make_tpg(wwn, name);
940 if (!se_tpg || IS_ERR(se_tpg))
941 return ERR_PTR(-EINVAL);
942
943 config_group_init_type_name(&se_tpg->tpg_group, name,
944 &tf->tf_tpg_base_cit);
945
946 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
947 &tf->tf_tpg_lun_cit);
948 configfs_add_default_group(&se_tpg->tpg_lun_group,
949 &se_tpg->tpg_group);
950
951 config_group_init_type_name(&se_tpg->tpg_np_group, "np",
952 &tf->tf_tpg_np_cit);
953 configfs_add_default_group(&se_tpg->tpg_np_group,
954 &se_tpg->tpg_group);
955
956 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
957 &tf->tf_tpg_nacl_cit);
958 configfs_add_default_group(&se_tpg->tpg_acl_group,
959 &se_tpg->tpg_group);
960
961 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
962 &tf->tf_tpg_attrib_cit);
963 configfs_add_default_group(&se_tpg->tpg_attrib_group,
964 &se_tpg->tpg_group);
965
966 config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
967 &tf->tf_tpg_auth_cit);
968 configfs_add_default_group(&se_tpg->tpg_auth_group,
969 &se_tpg->tpg_group);
970
971 config_group_init_type_name(&se_tpg->tpg_param_group, "param",
972 &tf->tf_tpg_param_cit);
973 configfs_add_default_group(&se_tpg->tpg_param_group,
974 &se_tpg->tpg_group);
975
976 return &se_tpg->tpg_group;
977}
978
979static void target_fabric_drop_tpg(
980 struct config_group *group,
981 struct config_item *item)
982{
983 struct se_portal_group *se_tpg = container_of(to_config_group(item),
984 struct se_portal_group, tpg_group);
985
986 configfs_remove_default_groups(&se_tpg->tpg_group);
987 config_item_put(item);
988}
989
990static void target_fabric_release_wwn(struct config_item *item)
991{
992 struct se_wwn *wwn = container_of(to_config_group(item),
993 struct se_wwn, wwn_group);
994 struct target_fabric_configfs *tf = wwn->wwn_tf;
995
996 configfs_remove_default_groups(&wwn->fabric_stat_group);
997 configfs_remove_default_groups(&wwn->param_group);
998 tf->tf_ops->fabric_drop_wwn(wwn);
999}
1000
1001static struct configfs_item_operations target_fabric_tpg_item_ops = {
1002 .release = target_fabric_release_wwn,
1003};
1004
1005static struct configfs_group_operations target_fabric_tpg_group_ops = {
1006 .make_group = target_fabric_make_tpg,
1007 .drop_item = target_fabric_drop_tpg,
1008};
1009
1010TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1011 NULL);
1012
1013/* End of tfc_tpg_cit */
1014
1015/* Start of tfc_wwn_fabric_stats_cit */
1016/*
1017 * This is used as a placeholder for struct se_wwn->fabric_stat_group
1018 * to allow fabrics access to ->fabric_stat_group->default_groups[]
1019 */
1020TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1021
1022/* End of tfc_wwn_fabric_stats_cit */
1023
1024static ssize_t
1025target_fabric_wwn_cmd_completion_affinity_show(struct config_item *item,
1026 char *page)
1027{
1028 struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
1029 param_group);
1030 return sprintf(page, "%d\n",
1031 wwn->cmd_compl_affinity == WORK_CPU_UNBOUND ?
1032 SE_COMPL_AFFINITY_CURR_CPU : wwn->cmd_compl_affinity);
1033}
1034
1035static ssize_t
1036target_fabric_wwn_cmd_completion_affinity_store(struct config_item *item,
1037 const char *page, size_t count)
1038{
1039 struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
1040 param_group);
1041 int compl_val;
1042
1043 if (kstrtoint(page, 0, &compl_val))
1044 return -EINVAL;
1045
1046 switch (compl_val) {
1047 case SE_COMPL_AFFINITY_CPUID:
1048 wwn->cmd_compl_affinity = compl_val;
1049 break;
1050 case SE_COMPL_AFFINITY_CURR_CPU:
1051 wwn->cmd_compl_affinity = WORK_CPU_UNBOUND;
1052 break;
1053 default:
1054 if (compl_val < 0 || compl_val >= nr_cpu_ids ||
1055 !cpu_online(compl_val)) {
1056 pr_err("Command completion value must be between %d and %d or an online CPU.\n",
1057 SE_COMPL_AFFINITY_CPUID,
1058 SE_COMPL_AFFINITY_CURR_CPU);
1059 return -EINVAL;
1060 }
1061 wwn->cmd_compl_affinity = compl_val;
1062 }
1063
1064 return count;
1065}
1066CONFIGFS_ATTR(target_fabric_wwn_, cmd_completion_affinity);
1067
1068static ssize_t
1069target_fabric_wwn_default_submit_type_show(struct config_item *item,
1070 char *page)
1071{
1072 struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
1073 param_group);
1074 return sysfs_emit(page, "%u\n",
1075 wwn->wwn_tf->tf_ops->default_submit_type);
1076}
1077CONFIGFS_ATTR_RO(target_fabric_wwn_, default_submit_type);
1078
1079static ssize_t
1080target_fabric_wwn_direct_submit_supported_show(struct config_item *item,
1081 char *page)
1082{
1083 struct se_wwn *wwn = container_of(to_config_group(item), struct se_wwn,
1084 param_group);
1085 return sysfs_emit(page, "%u\n",
1086 wwn->wwn_tf->tf_ops->direct_submit_supp);
1087}
1088CONFIGFS_ATTR_RO(target_fabric_wwn_, direct_submit_supported);
1089
1090static struct configfs_attribute *target_fabric_wwn_param_attrs[] = {
1091 &target_fabric_wwn_attr_cmd_completion_affinity,
1092 &target_fabric_wwn_attr_default_submit_type,
1093 &target_fabric_wwn_attr_direct_submit_supported,
1094 NULL,
1095};
1096
1097TF_CIT_SETUP(wwn_param, NULL, NULL, target_fabric_wwn_param_attrs);
1098
1099/* Start of tfc_wwn_cit */
1100
1101static struct config_group *target_fabric_make_wwn(
1102 struct config_group *group,
1103 const char *name)
1104{
1105 struct target_fabric_configfs *tf = container_of(group,
1106 struct target_fabric_configfs, tf_group);
1107 struct se_wwn *wwn;
1108
1109 if (!tf->tf_ops->fabric_make_wwn) {
1110 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1111 return ERR_PTR(-ENOSYS);
1112 }
1113
1114 wwn = tf->tf_ops->fabric_make_wwn(tf, group, name);
1115 if (!wwn || IS_ERR(wwn))
1116 return ERR_PTR(-EINVAL);
1117
1118 wwn->cmd_compl_affinity = SE_COMPL_AFFINITY_CPUID;
1119 wwn->wwn_tf = tf;
1120
1121 config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit);
1122
1123 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1124 &tf->tf_wwn_fabric_stats_cit);
1125 configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group);
1126
1127 config_group_init_type_name(&wwn->param_group, "param",
1128 &tf->tf_wwn_param_cit);
1129 configfs_add_default_group(&wwn->param_group, &wwn->wwn_group);
1130
1131 if (tf->tf_ops->add_wwn_groups)
1132 tf->tf_ops->add_wwn_groups(wwn);
1133 return &wwn->wwn_group;
1134}
1135
1136static void target_fabric_drop_wwn(
1137 struct config_group *group,
1138 struct config_item *item)
1139{
1140 struct se_wwn *wwn = container_of(to_config_group(item),
1141 struct se_wwn, wwn_group);
1142
1143 configfs_remove_default_groups(&wwn->wwn_group);
1144 config_item_put(item);
1145}
1146
1147static struct configfs_group_operations target_fabric_wwn_group_ops = {
1148 .make_group = target_fabric_make_wwn,
1149 .drop_item = target_fabric_drop_wwn,
1150};
1151
1152TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops);
1153TF_CIT_SETUP_DRV(discovery, NULL, NULL);
1154
1155int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1156{
1157 int ret;
1158
1159 target_fabric_setup_discovery_cit(tf);
1160 target_fabric_setup_wwn_cit(tf);
1161 target_fabric_setup_wwn_fabric_stats_cit(tf);
1162 target_fabric_setup_wwn_param_cit(tf);
1163 target_fabric_setup_tpg_cit(tf);
1164
1165 ret = target_fabric_setup_tpg_base_cit(tf);
1166 if (ret)
1167 return ret;
1168
1169 target_fabric_setup_tpg_port_cit(tf);
1170 target_fabric_setup_tpg_port_stat_cit(tf);
1171 target_fabric_setup_tpg_lun_cit(tf);
1172 target_fabric_setup_tpg_np_cit(tf);
1173 target_fabric_setup_tpg_np_base_cit(tf);
1174 target_fabric_setup_tpg_attrib_cit(tf);
1175 target_fabric_setup_tpg_auth_cit(tf);
1176 target_fabric_setup_tpg_param_cit(tf);
1177 target_fabric_setup_tpg_nacl_cit(tf);
1178 target_fabric_setup_tpg_nacl_base_cit(tf);
1179 target_fabric_setup_tpg_nacl_attrib_cit(tf);
1180 target_fabric_setup_tpg_nacl_auth_cit(tf);
1181 target_fabric_setup_tpg_nacl_param_cit(tf);
1182 target_fabric_setup_tpg_nacl_stat_cit(tf);
1183 target_fabric_setup_tpg_mappedlun_cit(tf);
1184 target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1185
1186 return 0;
1187}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*******************************************************************************
3* Filename: target_core_fabric_configfs.c
4 *
5 * This file contains generic fabric module configfs infrastructure for
6 * TCM v4.x code
7 *
8 * (c) Copyright 2010-2013 Datera, Inc.
9 *
10 * Nicholas A. Bellinger <nab@linux-iscsi.org>
11*
12 ****************************************************************************/
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/utsname.h>
17#include <linux/init.h>
18#include <linux/fs.h>
19#include <linux/namei.h>
20#include <linux/slab.h>
21#include <linux/types.h>
22#include <linux/delay.h>
23#include <linux/unistd.h>
24#include <linux/string.h>
25#include <linux/syscalls.h>
26#include <linux/configfs.h>
27
28#include <target/target_core_base.h>
29#include <target/target_core_backend.h>
30#include <target/target_core_fabric.h>
31
32#include "target_core_internal.h"
33#include "target_core_alua.h"
34#include "target_core_pr.h"
35
36#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
37static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
38{ \
39 struct config_item_type *cit = &tf->tf_##_name##_cit; \
40 \
41 cit->ct_item_ops = _item_ops; \
42 cit->ct_group_ops = _group_ops; \
43 cit->ct_attrs = _attrs; \
44 cit->ct_owner = tf->tf_ops->module; \
45 pr_debug("Setup generic %s\n", __stringify(_name)); \
46}
47
48#define TF_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
49static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
50{ \
51 struct config_item_type *cit = &tf->tf_##_name##_cit; \
52 struct configfs_attribute **attrs = tf->tf_ops->tfc_##_name##_attrs; \
53 \
54 cit->ct_item_ops = _item_ops; \
55 cit->ct_group_ops = _group_ops; \
56 cit->ct_attrs = attrs; \
57 cit->ct_owner = tf->tf_ops->module; \
58 pr_debug("Setup generic %s\n", __stringify(_name)); \
59}
60
61static struct configfs_item_operations target_fabric_port_item_ops;
62
63/* Start of tfc_tpg_mappedlun_cit */
64
65static int target_fabric_mappedlun_link(
66 struct config_item *lun_acl_ci,
67 struct config_item *lun_ci)
68{
69 struct se_dev_entry *deve;
70 struct se_lun *lun;
71 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
72 struct se_lun_acl, se_lun_group);
73 struct se_portal_group *se_tpg;
74 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
75 bool lun_access_ro;
76
77 if (!lun_ci->ci_type ||
78 lun_ci->ci_type->ct_item_ops != &target_fabric_port_item_ops) {
79 pr_err("Bad lun_ci, not a valid lun_ci pointer: %p\n", lun_ci);
80 return -EFAULT;
81 }
82 lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
83
84 /*
85 * Ensure that the source port exists
86 */
87 if (!lun->lun_se_dev) {
88 pr_err("Source se_lun->lun_se_dev does not exist\n");
89 return -EINVAL;
90 }
91 if (lun->lun_shutdown) {
92 pr_err("Unable to create mappedlun symlink because"
93 " lun->lun_shutdown=true\n");
94 return -EINVAL;
95 }
96 se_tpg = lun->lun_tpg;
97
98 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
99 tpg_ci = &nacl_ci->ci_group->cg_item;
100 wwn_ci = &tpg_ci->ci_group->cg_item;
101 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
102 wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
103 /*
104 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
105 */
106 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
107 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
108 config_item_name(wwn_ci));
109 return -EINVAL;
110 }
111 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
112 pr_err("Illegal Initiator ACL Symlink outside of %s"
113 " TPGT: %s\n", config_item_name(wwn_ci),
114 config_item_name(tpg_ci));
115 return -EINVAL;
116 }
117 /*
118 * If this struct se_node_acl was dynamically generated with
119 * tpg_1/attrib/generate_node_acls=1, use the existing
120 * deve->lun_access_ro value, which will be true when
121 * tpg_1/attrib/demo_mode_write_protect=1
122 */
123 rcu_read_lock();
124 deve = target_nacl_find_deve(lacl->se_lun_nacl, lacl->mapped_lun);
125 if (deve)
126 lun_access_ro = deve->lun_access_ro;
127 else
128 lun_access_ro =
129 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
130 se_tpg)) ? true : false;
131 rcu_read_unlock();
132 /*
133 * Determine the actual mapped LUN value user wants..
134 *
135 * This value is what the SCSI Initiator actually sees the
136 * $FABRIC/$WWPN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
137 */
138 return core_dev_add_initiator_node_lun_acl(se_tpg, lacl, lun, lun_access_ro);
139}
140
141static void target_fabric_mappedlun_unlink(
142 struct config_item *lun_acl_ci,
143 struct config_item *lun_ci)
144{
145 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
146 struct se_lun_acl, se_lun_group);
147 struct se_lun *lun = container_of(to_config_group(lun_ci),
148 struct se_lun, lun_group);
149
150 core_dev_del_initiator_node_lun_acl(lun, lacl);
151}
152
153static struct se_lun_acl *item_to_lun_acl(struct config_item *item)
154{
155 return container_of(to_config_group(item), struct se_lun_acl,
156 se_lun_group);
157}
158
159static ssize_t target_fabric_mappedlun_write_protect_show(
160 struct config_item *item, char *page)
161{
162 struct se_lun_acl *lacl = item_to_lun_acl(item);
163 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
164 struct se_dev_entry *deve;
165 ssize_t len = 0;
166
167 rcu_read_lock();
168 deve = target_nacl_find_deve(se_nacl, lacl->mapped_lun);
169 if (deve) {
170 len = sprintf(page, "%d\n", deve->lun_access_ro);
171 }
172 rcu_read_unlock();
173
174 return len;
175}
176
177static ssize_t target_fabric_mappedlun_write_protect_store(
178 struct config_item *item, const char *page, size_t count)
179{
180 struct se_lun_acl *lacl = item_to_lun_acl(item);
181 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
182 struct se_portal_group *se_tpg = se_nacl->se_tpg;
183 unsigned long wp;
184 int ret;
185
186 ret = kstrtoul(page, 0, &wp);
187 if (ret)
188 return ret;
189
190 if ((wp != 1) && (wp != 0))
191 return -EINVAL;
192
193 /* wp=1 means lun_access_ro=true */
194 core_update_device_list_access(lacl->mapped_lun, wp, lacl->se_lun_nacl);
195
196 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
197 " Mapped LUN: %llu Write Protect bit to %s\n",
198 se_tpg->se_tpg_tfo->fabric_name,
199 se_nacl->initiatorname, lacl->mapped_lun, (wp) ? "ON" : "OFF");
200
201 return count;
202
203}
204
205CONFIGFS_ATTR(target_fabric_mappedlun_, write_protect);
206
207static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
208 &target_fabric_mappedlun_attr_write_protect,
209 NULL,
210};
211
212static void target_fabric_mappedlun_release(struct config_item *item)
213{
214 struct se_lun_acl *lacl = container_of(to_config_group(item),
215 struct se_lun_acl, se_lun_group);
216 struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
217
218 core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
219}
220
221static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
222 .release = target_fabric_mappedlun_release,
223 .allow_link = target_fabric_mappedlun_link,
224 .drop_link = target_fabric_mappedlun_unlink,
225};
226
227TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
228 target_fabric_mappedlun_attrs);
229
230/* End of tfc_tpg_mappedlun_cit */
231
232/* Start of tfc_tpg_mappedlun_port_cit */
233
234static struct config_group *target_core_mappedlun_stat_mkdir(
235 struct config_group *group,
236 const char *name)
237{
238 return ERR_PTR(-ENOSYS);
239}
240
241static void target_core_mappedlun_stat_rmdir(
242 struct config_group *group,
243 struct config_item *item)
244{
245 return;
246}
247
248static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
249 .make_group = target_core_mappedlun_stat_mkdir,
250 .drop_item = target_core_mappedlun_stat_rmdir,
251};
252
253TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
254 NULL);
255
256/* End of tfc_tpg_mappedlun_port_cit */
257
258TF_CIT_SETUP_DRV(tpg_nacl_attrib, NULL, NULL);
259TF_CIT_SETUP_DRV(tpg_nacl_auth, NULL, NULL);
260TF_CIT_SETUP_DRV(tpg_nacl_param, NULL, NULL);
261
262/* Start of tfc_tpg_nacl_base_cit */
263
264static struct config_group *target_fabric_make_mappedlun(
265 struct config_group *group,
266 const char *name)
267{
268 struct se_node_acl *se_nacl = container_of(group,
269 struct se_node_acl, acl_group);
270 struct se_portal_group *se_tpg = se_nacl->se_tpg;
271 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
272 struct se_lun_acl *lacl = NULL;
273 char *buf;
274 unsigned long long mapped_lun;
275 int ret = 0;
276
277 buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
278 if (!buf) {
279 pr_err("Unable to allocate memory for name buf\n");
280 return ERR_PTR(-ENOMEM);
281 }
282 snprintf(buf, strlen(name) + 1, "%s", name);
283 /*
284 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
285 */
286 if (strstr(buf, "lun_") != buf) {
287 pr_err("Unable to locate \"lun_\" from buf: %s"
288 " name: %s\n", buf, name);
289 ret = -EINVAL;
290 goto out;
291 }
292 /*
293 * Determine the Mapped LUN value. This is what the SCSI Initiator
294 * Port will actually see.
295 */
296 ret = kstrtoull(buf + 4, 0, &mapped_lun);
297 if (ret)
298 goto out;
299
300 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, se_nacl,
301 mapped_lun, &ret);
302 if (!lacl) {
303 ret = -EINVAL;
304 goto out;
305 }
306
307 config_group_init_type_name(&lacl->se_lun_group, name,
308 &tf->tf_tpg_mappedlun_cit);
309
310 config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
311 "statistics", &tf->tf_tpg_mappedlun_stat_cit);
312 configfs_add_default_group(&lacl->ml_stat_grps.stat_group,
313 &lacl->se_lun_group);
314
315 target_stat_setup_mappedlun_default_groups(lacl);
316
317 kfree(buf);
318 return &lacl->se_lun_group;
319out:
320 kfree(lacl);
321 kfree(buf);
322 return ERR_PTR(ret);
323}
324
325static void target_fabric_drop_mappedlun(
326 struct config_group *group,
327 struct config_item *item)
328{
329 struct se_lun_acl *lacl = container_of(to_config_group(item),
330 struct se_lun_acl, se_lun_group);
331
332 configfs_remove_default_groups(&lacl->ml_stat_grps.stat_group);
333 configfs_remove_default_groups(&lacl->se_lun_group);
334
335 config_item_put(item);
336}
337
338static void target_fabric_nacl_base_release(struct config_item *item)
339{
340 struct se_node_acl *se_nacl = container_of(to_config_group(item),
341 struct se_node_acl, acl_group);
342
343 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group);
344 core_tpg_del_initiator_node_acl(se_nacl);
345}
346
347static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
348 .release = target_fabric_nacl_base_release,
349};
350
351static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
352 .make_group = target_fabric_make_mappedlun,
353 .drop_item = target_fabric_drop_mappedlun,
354};
355
356TF_CIT_SETUP_DRV(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
357 &target_fabric_nacl_base_group_ops);
358
359/* End of tfc_tpg_nacl_base_cit */
360
361/* Start of tfc_node_fabric_stats_cit */
362/*
363 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
364 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
365 */
366TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
367
368/* End of tfc_wwn_fabric_stats_cit */
369
370/* Start of tfc_tpg_nacl_cit */
371
372static struct config_group *target_fabric_make_nodeacl(
373 struct config_group *group,
374 const char *name)
375{
376 struct se_portal_group *se_tpg = container_of(group,
377 struct se_portal_group, tpg_acl_group);
378 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
379 struct se_node_acl *se_nacl;
380
381 se_nacl = core_tpg_add_initiator_node_acl(se_tpg, name);
382 if (IS_ERR(se_nacl))
383 return ERR_CAST(se_nacl);
384
385 config_group_init_type_name(&se_nacl->acl_group, name,
386 &tf->tf_tpg_nacl_base_cit);
387
388 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
389 &tf->tf_tpg_nacl_attrib_cit);
390 configfs_add_default_group(&se_nacl->acl_attrib_group,
391 &se_nacl->acl_group);
392
393 config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
394 &tf->tf_tpg_nacl_auth_cit);
395 configfs_add_default_group(&se_nacl->acl_auth_group,
396 &se_nacl->acl_group);
397
398 config_group_init_type_name(&se_nacl->acl_param_group, "param",
399 &tf->tf_tpg_nacl_param_cit);
400 configfs_add_default_group(&se_nacl->acl_param_group,
401 &se_nacl->acl_group);
402
403 config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
404 "fabric_statistics", &tf->tf_tpg_nacl_stat_cit);
405 configfs_add_default_group(&se_nacl->acl_fabric_stat_group,
406 &se_nacl->acl_group);
407
408 if (tf->tf_ops->fabric_init_nodeacl) {
409 int ret = tf->tf_ops->fabric_init_nodeacl(se_nacl, name);
410 if (ret) {
411 configfs_remove_default_groups(&se_nacl->acl_fabric_stat_group);
412 core_tpg_del_initiator_node_acl(se_nacl);
413 return ERR_PTR(ret);
414 }
415 }
416
417 return &se_nacl->acl_group;
418}
419
420static void target_fabric_drop_nodeacl(
421 struct config_group *group,
422 struct config_item *item)
423{
424 struct se_node_acl *se_nacl = container_of(to_config_group(item),
425 struct se_node_acl, acl_group);
426
427 configfs_remove_default_groups(&se_nacl->acl_group);
428
429 /*
430 * struct se_node_acl free is done in target_fabric_nacl_base_release()
431 */
432 config_item_put(item);
433}
434
435static struct configfs_group_operations target_fabric_nacl_group_ops = {
436 .make_group = target_fabric_make_nodeacl,
437 .drop_item = target_fabric_drop_nodeacl,
438};
439
440TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
441
442/* End of tfc_tpg_nacl_cit */
443
444/* Start of tfc_tpg_np_base_cit */
445
446static void target_fabric_np_base_release(struct config_item *item)
447{
448 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
449 struct se_tpg_np, tpg_np_group);
450 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
451 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
452
453 tf->tf_ops->fabric_drop_np(se_tpg_np);
454}
455
456static struct configfs_item_operations target_fabric_np_base_item_ops = {
457 .release = target_fabric_np_base_release,
458};
459
460TF_CIT_SETUP_DRV(tpg_np_base, &target_fabric_np_base_item_ops, NULL);
461
462/* End of tfc_tpg_np_base_cit */
463
464/* Start of tfc_tpg_np_cit */
465
466static struct config_group *target_fabric_make_np(
467 struct config_group *group,
468 const char *name)
469{
470 struct se_portal_group *se_tpg = container_of(group,
471 struct se_portal_group, tpg_np_group);
472 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
473 struct se_tpg_np *se_tpg_np;
474
475 if (!tf->tf_ops->fabric_make_np) {
476 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
477 return ERR_PTR(-ENOSYS);
478 }
479
480 se_tpg_np = tf->tf_ops->fabric_make_np(se_tpg, group, name);
481 if (!se_tpg_np || IS_ERR(se_tpg_np))
482 return ERR_PTR(-EINVAL);
483
484 se_tpg_np->tpg_np_parent = se_tpg;
485 config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
486 &tf->tf_tpg_np_base_cit);
487
488 return &se_tpg_np->tpg_np_group;
489}
490
491static void target_fabric_drop_np(
492 struct config_group *group,
493 struct config_item *item)
494{
495 /*
496 * struct se_tpg_np is released via target_fabric_np_base_release()
497 */
498 config_item_put(item);
499}
500
501static struct configfs_group_operations target_fabric_np_group_ops = {
502 .make_group = &target_fabric_make_np,
503 .drop_item = &target_fabric_drop_np,
504};
505
506TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
507
508/* End of tfc_tpg_np_cit */
509
510/* Start of tfc_tpg_port_cit */
511
512static struct se_lun *item_to_lun(struct config_item *item)
513{
514 return container_of(to_config_group(item), struct se_lun,
515 lun_group);
516}
517
518static ssize_t target_fabric_port_alua_tg_pt_gp_show(struct config_item *item,
519 char *page)
520{
521 struct se_lun *lun = item_to_lun(item);
522
523 if (!lun || !lun->lun_se_dev)
524 return -ENODEV;
525
526 return core_alua_show_tg_pt_gp_info(lun, page);
527}
528
529static ssize_t target_fabric_port_alua_tg_pt_gp_store(struct config_item *item,
530 const char *page, size_t count)
531{
532 struct se_lun *lun = item_to_lun(item);
533
534 if (!lun || !lun->lun_se_dev)
535 return -ENODEV;
536
537 return core_alua_store_tg_pt_gp_info(lun, page, count);
538}
539
540static ssize_t target_fabric_port_alua_tg_pt_offline_show(
541 struct config_item *item, char *page)
542{
543 struct se_lun *lun = item_to_lun(item);
544
545 if (!lun || !lun->lun_se_dev)
546 return -ENODEV;
547
548 return core_alua_show_offline_bit(lun, page);
549}
550
551static ssize_t target_fabric_port_alua_tg_pt_offline_store(
552 struct config_item *item, const char *page, size_t count)
553{
554 struct se_lun *lun = item_to_lun(item);
555
556 if (!lun || !lun->lun_se_dev)
557 return -ENODEV;
558
559 return core_alua_store_offline_bit(lun, page, count);
560}
561
562static ssize_t target_fabric_port_alua_tg_pt_status_show(
563 struct config_item *item, char *page)
564{
565 struct se_lun *lun = item_to_lun(item);
566
567 if (!lun || !lun->lun_se_dev)
568 return -ENODEV;
569
570 return core_alua_show_secondary_status(lun, page);
571}
572
573static ssize_t target_fabric_port_alua_tg_pt_status_store(
574 struct config_item *item, const char *page, size_t count)
575{
576 struct se_lun *lun = item_to_lun(item);
577
578 if (!lun || !lun->lun_se_dev)
579 return -ENODEV;
580
581 return core_alua_store_secondary_status(lun, page, count);
582}
583
584static ssize_t target_fabric_port_alua_tg_pt_write_md_show(
585 struct config_item *item, char *page)
586{
587 struct se_lun *lun = item_to_lun(item);
588
589 if (!lun || !lun->lun_se_dev)
590 return -ENODEV;
591
592 return core_alua_show_secondary_write_metadata(lun, page);
593}
594
595static ssize_t target_fabric_port_alua_tg_pt_write_md_store(
596 struct config_item *item, const char *page, size_t count)
597{
598 struct se_lun *lun = item_to_lun(item);
599
600 if (!lun || !lun->lun_se_dev)
601 return -ENODEV;
602
603 return core_alua_store_secondary_write_metadata(lun, page, count);
604}
605
606CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_gp);
607CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_offline);
608CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_status);
609CONFIGFS_ATTR(target_fabric_port_, alua_tg_pt_write_md);
610
611static struct configfs_attribute *target_fabric_port_attrs[] = {
612 &target_fabric_port_attr_alua_tg_pt_gp,
613 &target_fabric_port_attr_alua_tg_pt_offline,
614 &target_fabric_port_attr_alua_tg_pt_status,
615 &target_fabric_port_attr_alua_tg_pt_write_md,
616 NULL,
617};
618
619static int target_fabric_port_link(
620 struct config_item *lun_ci,
621 struct config_item *se_dev_ci)
622{
623 struct config_item *tpg_ci;
624 struct se_lun *lun = container_of(to_config_group(lun_ci),
625 struct se_lun, lun_group);
626 struct se_portal_group *se_tpg;
627 struct se_device *dev;
628 struct target_fabric_configfs *tf;
629 int ret;
630
631 if (!se_dev_ci->ci_type ||
632 se_dev_ci->ci_type->ct_item_ops != &target_core_dev_item_ops) {
633 pr_err("Bad se_dev_ci, not a valid se_dev_ci pointer: %p\n", se_dev_ci);
634 return -EFAULT;
635 }
636 dev = container_of(to_config_group(se_dev_ci), struct se_device, dev_group);
637
638 if (!target_dev_configured(dev)) {
639 pr_err("se_device not configured yet, cannot port link\n");
640 return -ENODEV;
641 }
642
643 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
644 se_tpg = container_of(to_config_group(tpg_ci),
645 struct se_portal_group, tpg_group);
646 tf = se_tpg->se_tpg_wwn->wwn_tf;
647
648 if (lun->lun_se_dev != NULL) {
649 pr_err("Port Symlink already exists\n");
650 return -EEXIST;
651 }
652
653 ret = core_dev_add_lun(se_tpg, dev, lun);
654 if (ret) {
655 pr_err("core_dev_add_lun() failed: %d\n", ret);
656 goto out;
657 }
658
659 if (tf->tf_ops->fabric_post_link) {
660 /*
661 * Call the optional fabric_post_link() to allow a
662 * fabric module to setup any additional state once
663 * core_dev_add_lun() has been called..
664 */
665 tf->tf_ops->fabric_post_link(se_tpg, lun);
666 }
667
668 return 0;
669out:
670 return ret;
671}
672
673static void target_fabric_port_unlink(
674 struct config_item *lun_ci,
675 struct config_item *se_dev_ci)
676{
677 struct se_lun *lun = container_of(to_config_group(lun_ci),
678 struct se_lun, lun_group);
679 struct se_portal_group *se_tpg = lun->lun_tpg;
680 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
681
682 if (tf->tf_ops->fabric_pre_unlink) {
683 /*
684 * Call the optional fabric_pre_unlink() to allow a
685 * fabric module to release any additional stat before
686 * core_dev_del_lun() is called.
687 */
688 tf->tf_ops->fabric_pre_unlink(se_tpg, lun);
689 }
690
691 core_dev_del_lun(se_tpg, lun);
692}
693
694static void target_fabric_port_release(struct config_item *item)
695{
696 struct se_lun *lun = container_of(to_config_group(item),
697 struct se_lun, lun_group);
698
699 kfree_rcu(lun, rcu_head);
700}
701
702static struct configfs_item_operations target_fabric_port_item_ops = {
703 .release = target_fabric_port_release,
704 .allow_link = target_fabric_port_link,
705 .drop_link = target_fabric_port_unlink,
706};
707
708TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
709
710/* End of tfc_tpg_port_cit */
711
712/* Start of tfc_tpg_port_stat_cit */
713
714static struct config_group *target_core_port_stat_mkdir(
715 struct config_group *group,
716 const char *name)
717{
718 return ERR_PTR(-ENOSYS);
719}
720
721static void target_core_port_stat_rmdir(
722 struct config_group *group,
723 struct config_item *item)
724{
725 return;
726}
727
728static struct configfs_group_operations target_fabric_port_stat_group_ops = {
729 .make_group = target_core_port_stat_mkdir,
730 .drop_item = target_core_port_stat_rmdir,
731};
732
733TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
734
735/* End of tfc_tpg_port_stat_cit */
736
737/* Start of tfc_tpg_lun_cit */
738
739static struct config_group *target_fabric_make_lun(
740 struct config_group *group,
741 const char *name)
742{
743 struct se_lun *lun;
744 struct se_portal_group *se_tpg = container_of(group,
745 struct se_portal_group, tpg_lun_group);
746 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
747 unsigned long long unpacked_lun;
748 int errno;
749
750 if (strstr(name, "lun_") != name) {
751 pr_err("Unable to locate \'_\" in"
752 " \"lun_$LUN_NUMBER\"\n");
753 return ERR_PTR(-EINVAL);
754 }
755 errno = kstrtoull(name + 4, 0, &unpacked_lun);
756 if (errno)
757 return ERR_PTR(errno);
758
759 lun = core_tpg_alloc_lun(se_tpg, unpacked_lun);
760 if (IS_ERR(lun))
761 return ERR_CAST(lun);
762
763 config_group_init_type_name(&lun->lun_group, name,
764 &tf->tf_tpg_port_cit);
765
766 config_group_init_type_name(&lun->port_stat_grps.stat_group,
767 "statistics", &tf->tf_tpg_port_stat_cit);
768 configfs_add_default_group(&lun->port_stat_grps.stat_group,
769 &lun->lun_group);
770
771 target_stat_setup_port_default_groups(lun);
772
773 return &lun->lun_group;
774}
775
776static void target_fabric_drop_lun(
777 struct config_group *group,
778 struct config_item *item)
779{
780 struct se_lun *lun = container_of(to_config_group(item),
781 struct se_lun, lun_group);
782
783 configfs_remove_default_groups(&lun->port_stat_grps.stat_group);
784 configfs_remove_default_groups(&lun->lun_group);
785
786 config_item_put(item);
787}
788
789static struct configfs_group_operations target_fabric_lun_group_ops = {
790 .make_group = &target_fabric_make_lun,
791 .drop_item = &target_fabric_drop_lun,
792};
793
794TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
795
796/* End of tfc_tpg_lun_cit */
797
798TF_CIT_SETUP_DRV(tpg_attrib, NULL, NULL);
799TF_CIT_SETUP_DRV(tpg_auth, NULL, NULL);
800TF_CIT_SETUP_DRV(tpg_param, NULL, NULL);
801
802/* Start of tfc_tpg_base_cit */
803
804static void target_fabric_tpg_release(struct config_item *item)
805{
806 struct se_portal_group *se_tpg = container_of(to_config_group(item),
807 struct se_portal_group, tpg_group);
808 struct se_wwn *wwn = se_tpg->se_tpg_wwn;
809 struct target_fabric_configfs *tf = wwn->wwn_tf;
810
811 tf->tf_ops->fabric_drop_tpg(se_tpg);
812}
813
814static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
815 .release = target_fabric_tpg_release,
816};
817
818TF_CIT_SETUP_DRV(tpg_base, &target_fabric_tpg_base_item_ops, NULL);
819
820/* End of tfc_tpg_base_cit */
821
822/* Start of tfc_tpg_cit */
823
824static struct config_group *target_fabric_make_tpg(
825 struct config_group *group,
826 const char *name)
827{
828 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
829 struct target_fabric_configfs *tf = wwn->wwn_tf;
830 struct se_portal_group *se_tpg;
831
832 if (!tf->tf_ops->fabric_make_tpg) {
833 pr_err("tf->tf_ops->fabric_make_tpg is NULL\n");
834 return ERR_PTR(-ENOSYS);
835 }
836
837 se_tpg = tf->tf_ops->fabric_make_tpg(wwn, name);
838 if (!se_tpg || IS_ERR(se_tpg))
839 return ERR_PTR(-EINVAL);
840
841 config_group_init_type_name(&se_tpg->tpg_group, name,
842 &tf->tf_tpg_base_cit);
843
844 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
845 &tf->tf_tpg_lun_cit);
846 configfs_add_default_group(&se_tpg->tpg_lun_group,
847 &se_tpg->tpg_group);
848
849 config_group_init_type_name(&se_tpg->tpg_np_group, "np",
850 &tf->tf_tpg_np_cit);
851 configfs_add_default_group(&se_tpg->tpg_np_group,
852 &se_tpg->tpg_group);
853
854 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
855 &tf->tf_tpg_nacl_cit);
856 configfs_add_default_group(&se_tpg->tpg_acl_group,
857 &se_tpg->tpg_group);
858
859 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
860 &tf->tf_tpg_attrib_cit);
861 configfs_add_default_group(&se_tpg->tpg_attrib_group,
862 &se_tpg->tpg_group);
863
864 config_group_init_type_name(&se_tpg->tpg_auth_group, "auth",
865 &tf->tf_tpg_auth_cit);
866 configfs_add_default_group(&se_tpg->tpg_auth_group,
867 &se_tpg->tpg_group);
868
869 config_group_init_type_name(&se_tpg->tpg_param_group, "param",
870 &tf->tf_tpg_param_cit);
871 configfs_add_default_group(&se_tpg->tpg_param_group,
872 &se_tpg->tpg_group);
873
874 return &se_tpg->tpg_group;
875}
876
877static void target_fabric_drop_tpg(
878 struct config_group *group,
879 struct config_item *item)
880{
881 struct se_portal_group *se_tpg = container_of(to_config_group(item),
882 struct se_portal_group, tpg_group);
883
884 configfs_remove_default_groups(&se_tpg->tpg_group);
885 config_item_put(item);
886}
887
888static void target_fabric_release_wwn(struct config_item *item)
889{
890 struct se_wwn *wwn = container_of(to_config_group(item),
891 struct se_wwn, wwn_group);
892 struct target_fabric_configfs *tf = wwn->wwn_tf;
893
894 configfs_remove_default_groups(&wwn->fabric_stat_group);
895 tf->tf_ops->fabric_drop_wwn(wwn);
896}
897
898static struct configfs_item_operations target_fabric_tpg_item_ops = {
899 .release = target_fabric_release_wwn,
900};
901
902static struct configfs_group_operations target_fabric_tpg_group_ops = {
903 .make_group = target_fabric_make_tpg,
904 .drop_item = target_fabric_drop_tpg,
905};
906
907TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
908 NULL);
909
910/* End of tfc_tpg_cit */
911
912/* Start of tfc_wwn_fabric_stats_cit */
913/*
914 * This is used as a placeholder for struct se_wwn->fabric_stat_group
915 * to allow fabrics access to ->fabric_stat_group->default_groups[]
916 */
917TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
918
919/* End of tfc_wwn_fabric_stats_cit */
920
921/* Start of tfc_wwn_cit */
922
923static struct config_group *target_fabric_make_wwn(
924 struct config_group *group,
925 const char *name)
926{
927 struct target_fabric_configfs *tf = container_of(group,
928 struct target_fabric_configfs, tf_group);
929 struct se_wwn *wwn;
930
931 if (!tf->tf_ops->fabric_make_wwn) {
932 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
933 return ERR_PTR(-ENOSYS);
934 }
935
936 wwn = tf->tf_ops->fabric_make_wwn(tf, group, name);
937 if (!wwn || IS_ERR(wwn))
938 return ERR_PTR(-EINVAL);
939
940 wwn->wwn_tf = tf;
941
942 config_group_init_type_name(&wwn->wwn_group, name, &tf->tf_tpg_cit);
943
944 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
945 &tf->tf_wwn_fabric_stats_cit);
946 configfs_add_default_group(&wwn->fabric_stat_group, &wwn->wwn_group);
947
948 if (tf->tf_ops->add_wwn_groups)
949 tf->tf_ops->add_wwn_groups(wwn);
950 return &wwn->wwn_group;
951}
952
953static void target_fabric_drop_wwn(
954 struct config_group *group,
955 struct config_item *item)
956{
957 struct se_wwn *wwn = container_of(to_config_group(item),
958 struct se_wwn, wwn_group);
959
960 configfs_remove_default_groups(&wwn->wwn_group);
961 config_item_put(item);
962}
963
964static struct configfs_group_operations target_fabric_wwn_group_ops = {
965 .make_group = target_fabric_make_wwn,
966 .drop_item = target_fabric_drop_wwn,
967};
968
969TF_CIT_SETUP_DRV(wwn, NULL, &target_fabric_wwn_group_ops);
970TF_CIT_SETUP_DRV(discovery, NULL, NULL);
971
972int target_fabric_setup_cits(struct target_fabric_configfs *tf)
973{
974 target_fabric_setup_discovery_cit(tf);
975 target_fabric_setup_wwn_cit(tf);
976 target_fabric_setup_wwn_fabric_stats_cit(tf);
977 target_fabric_setup_tpg_cit(tf);
978 target_fabric_setup_tpg_base_cit(tf);
979 target_fabric_setup_tpg_port_cit(tf);
980 target_fabric_setup_tpg_port_stat_cit(tf);
981 target_fabric_setup_tpg_lun_cit(tf);
982 target_fabric_setup_tpg_np_cit(tf);
983 target_fabric_setup_tpg_np_base_cit(tf);
984 target_fabric_setup_tpg_attrib_cit(tf);
985 target_fabric_setup_tpg_auth_cit(tf);
986 target_fabric_setup_tpg_param_cit(tf);
987 target_fabric_setup_tpg_nacl_cit(tf);
988 target_fabric_setup_tpg_nacl_base_cit(tf);
989 target_fabric_setup_tpg_nacl_attrib_cit(tf);
990 target_fabric_setup_tpg_nacl_auth_cit(tf);
991 target_fabric_setup_tpg_nacl_param_cit(tf);
992 target_fabric_setup_tpg_nacl_stat_cit(tf);
993 target_fabric_setup_tpg_mappedlun_cit(tf);
994 target_fabric_setup_tpg_mappedlun_stat_cit(tf);
995
996 return 0;
997}