Loading...
1/*******************************************************************************
2* Filename: target_core_fabric_configfs.c
3 *
4 * This file contains generic fabric module configfs infrastructure for
5 * TCM v4.x code
6 *
7 * Copyright (c) 2010,2011 Rising Tide Systems
8 * Copyright (c) 2010,2011 Linux-iSCSI.org
9 *
10 * Copyright (c) Nicholas A. Bellinger <nab@linux-iscsi.org>
11*
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23#include <linux/module.h>
24#include <linux/moduleparam.h>
25#include <generated/utsrelease.h>
26#include <linux/utsname.h>
27#include <linux/init.h>
28#include <linux/fs.h>
29#include <linux/namei.h>
30#include <linux/slab.h>
31#include <linux/types.h>
32#include <linux/delay.h>
33#include <linux/unistd.h>
34#include <linux/string.h>
35#include <linux/syscalls.h>
36#include <linux/configfs.h>
37
38#include <target/target_core_base.h>
39#include <target/target_core_fabric.h>
40#include <target/target_core_fabric_configfs.h>
41#include <target/target_core_configfs.h>
42#include <target/configfs_macros.h>
43
44#include "target_core_internal.h"
45#include "target_core_alua.h"
46#include "target_core_pr.h"
47
48#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
49static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
50{ \
51 struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
52 struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
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_module; \
58 pr_debug("Setup generic %s\n", __stringify(_name)); \
59}
60
61/* Start of tfc_tpg_mappedlun_cit */
62
63static int target_fabric_mappedlun_link(
64 struct config_item *lun_acl_ci,
65 struct config_item *lun_ci)
66{
67 struct se_dev_entry *deve;
68 struct se_lun *lun = container_of(to_config_group(lun_ci),
69 struct se_lun, lun_group);
70 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
71 struct se_lun_acl, se_lun_group);
72 struct se_portal_group *se_tpg;
73 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
74 int ret = 0, lun_access;
75 /*
76 * Ensure that the source port exists
77 */
78 if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
79 pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
80 "_tpg does not exist\n");
81 return -EINVAL;
82 }
83 se_tpg = lun->lun_sep->sep_tpg;
84
85 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
86 tpg_ci = &nacl_ci->ci_group->cg_item;
87 wwn_ci = &tpg_ci->ci_group->cg_item;
88 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
89 wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
90 /*
91 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
92 */
93 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
94 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
95 config_item_name(wwn_ci));
96 return -EINVAL;
97 }
98 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
99 pr_err("Illegal Initiator ACL Symlink outside of %s"
100 " TPGT: %s\n", config_item_name(wwn_ci),
101 config_item_name(tpg_ci));
102 return -EINVAL;
103 }
104 /*
105 * If this struct se_node_acl was dynamically generated with
106 * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
107 * which be will write protected (READ-ONLY) when
108 * tpg_1/attrib/demo_mode_write_protect=1
109 */
110 spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
111 deve = lacl->se_lun_nacl->device_list[lacl->mapped_lun];
112 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
113 lun_access = deve->lun_flags;
114 else
115 lun_access =
116 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
117 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
118 TRANSPORT_LUNFLAGS_READ_WRITE;
119 spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
120 /*
121 * Determine the actual mapped LUN value user wants..
122 *
123 * This value is what the SCSI Initiator actually sees the
124 * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
125 */
126 ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
127 lun->unpacked_lun, lun_access);
128
129 return (ret < 0) ? -EINVAL : 0;
130}
131
132static int target_fabric_mappedlun_unlink(
133 struct config_item *lun_acl_ci,
134 struct config_item *lun_ci)
135{
136 struct se_lun *lun;
137 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
138 struct se_lun_acl, se_lun_group);
139 struct se_node_acl *nacl = lacl->se_lun_nacl;
140 struct se_dev_entry *deve = nacl->device_list[lacl->mapped_lun];
141 struct se_portal_group *se_tpg;
142 /*
143 * Determine if the underlying MappedLUN has already been released..
144 */
145 if (!deve->se_lun)
146 return 0;
147
148 lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
149 se_tpg = lun->lun_sep->sep_tpg;
150
151 core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
152 return 0;
153}
154
155CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
156#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
157static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
158 __CONFIGFS_EATTR(_name, _mode, \
159 target_fabric_mappedlun_show_##_name, \
160 target_fabric_mappedlun_store_##_name);
161
162static ssize_t target_fabric_mappedlun_show_write_protect(
163 struct se_lun_acl *lacl,
164 char *page)
165{
166 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
167 struct se_dev_entry *deve;
168 ssize_t len;
169
170 spin_lock_irq(&se_nacl->device_list_lock);
171 deve = se_nacl->device_list[lacl->mapped_lun];
172 len = sprintf(page, "%d\n",
173 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
174 1 : 0);
175 spin_unlock_irq(&se_nacl->device_list_lock);
176
177 return len;
178}
179
180static ssize_t target_fabric_mappedlun_store_write_protect(
181 struct se_lun_acl *lacl,
182 const char *page,
183 size_t count)
184{
185 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
186 struct se_portal_group *se_tpg = se_nacl->se_tpg;
187 unsigned long op;
188
189 if (strict_strtoul(page, 0, &op))
190 return -EINVAL;
191
192 if ((op != 1) && (op != 0))
193 return -EINVAL;
194
195 core_update_device_list_access(lacl->mapped_lun, (op) ?
196 TRANSPORT_LUNFLAGS_READ_ONLY :
197 TRANSPORT_LUNFLAGS_READ_WRITE,
198 lacl->se_lun_nacl);
199
200 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
201 " Mapped LUN: %u Write Protect bit to %s\n",
202 se_tpg->se_tpg_tfo->get_fabric_name(),
203 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
204
205 return count;
206
207}
208
209TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
210
211CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
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_attribute *target_fabric_mappedlun_attrs[] = {
223 &target_fabric_mappedlun_write_protect.attr,
224 NULL,
225};
226
227static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
228 .release = target_fabric_mappedlun_release,
229 .show_attribute = target_fabric_mappedlun_attr_show,
230 .store_attribute = target_fabric_mappedlun_attr_store,
231 .allow_link = target_fabric_mappedlun_link,
232 .drop_link = target_fabric_mappedlun_unlink,
233};
234
235TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
236 target_fabric_mappedlun_attrs);
237
238/* End of tfc_tpg_mappedlun_cit */
239
240/* Start of tfc_tpg_mappedlun_port_cit */
241
242static struct config_group *target_core_mappedlun_stat_mkdir(
243 struct config_group *group,
244 const char *name)
245{
246 return ERR_PTR(-ENOSYS);
247}
248
249static void target_core_mappedlun_stat_rmdir(
250 struct config_group *group,
251 struct config_item *item)
252{
253 return;
254}
255
256static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
257 .make_group = target_core_mappedlun_stat_mkdir,
258 .drop_item = target_core_mappedlun_stat_rmdir,
259};
260
261TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
262 NULL);
263
264/* End of tfc_tpg_mappedlun_port_cit */
265
266/* Start of tfc_tpg_nacl_attrib_cit */
267
268CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
269
270static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
271 .show_attribute = target_fabric_nacl_attrib_attr_show,
272 .store_attribute = target_fabric_nacl_attrib_attr_store,
273};
274
275TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
276
277/* End of tfc_tpg_nacl_attrib_cit */
278
279/* Start of tfc_tpg_nacl_auth_cit */
280
281CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
282
283static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
284 .show_attribute = target_fabric_nacl_auth_attr_show,
285 .store_attribute = target_fabric_nacl_auth_attr_store,
286};
287
288TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
289
290/* End of tfc_tpg_nacl_auth_cit */
291
292/* Start of tfc_tpg_nacl_param_cit */
293
294CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
295
296static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
297 .show_attribute = target_fabric_nacl_param_attr_show,
298 .store_attribute = target_fabric_nacl_param_attr_store,
299};
300
301TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
302
303/* End of tfc_tpg_nacl_param_cit */
304
305/* Start of tfc_tpg_nacl_base_cit */
306
307CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
308
309static struct config_group *target_fabric_make_mappedlun(
310 struct config_group *group,
311 const char *name)
312{
313 struct se_node_acl *se_nacl = container_of(group,
314 struct se_node_acl, acl_group);
315 struct se_portal_group *se_tpg = se_nacl->se_tpg;
316 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
317 struct se_lun_acl *lacl;
318 struct config_item *acl_ci;
319 struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
320 char *buf;
321 unsigned long mapped_lun;
322 int ret = 0;
323
324 acl_ci = &group->cg_item;
325 if (!acl_ci) {
326 pr_err("Unable to locatel acl_ci\n");
327 return NULL;
328 }
329
330 buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
331 if (!buf) {
332 pr_err("Unable to allocate memory for name buf\n");
333 return ERR_PTR(-ENOMEM);
334 }
335 snprintf(buf, strlen(name) + 1, "%s", name);
336 /*
337 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
338 */
339 if (strstr(buf, "lun_") != buf) {
340 pr_err("Unable to locate \"lun_\" from buf: %s"
341 " name: %s\n", buf, name);
342 ret = -EINVAL;
343 goto out;
344 }
345 /*
346 * Determine the Mapped LUN value. This is what the SCSI Initiator
347 * Port will actually see.
348 */
349 if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
350 ret = -EINVAL;
351 goto out;
352 }
353
354 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
355 config_item_name(acl_ci), &ret);
356 if (!lacl) {
357 ret = -EINVAL;
358 goto out;
359 }
360
361 lacl_cg = &lacl->se_lun_group;
362 lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
363 GFP_KERNEL);
364 if (!lacl_cg->default_groups) {
365 pr_err("Unable to allocate lacl_cg->default_groups\n");
366 ret = -ENOMEM;
367 goto out;
368 }
369
370 config_group_init_type_name(&lacl->se_lun_group, name,
371 &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
372 config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
373 "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
374 lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
375 lacl_cg->default_groups[1] = NULL;
376
377 ml_stat_grp = &lacl->ml_stat_grps.stat_group;
378 ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
379 GFP_KERNEL);
380 if (!ml_stat_grp->default_groups) {
381 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
382 ret = -ENOMEM;
383 goto out;
384 }
385 target_stat_setup_mappedlun_default_groups(lacl);
386
387 kfree(buf);
388 return &lacl->se_lun_group;
389out:
390 if (lacl_cg)
391 kfree(lacl_cg->default_groups);
392 kfree(buf);
393 return ERR_PTR(ret);
394}
395
396static void target_fabric_drop_mappedlun(
397 struct config_group *group,
398 struct config_item *item)
399{
400 struct se_lun_acl *lacl = container_of(to_config_group(item),
401 struct se_lun_acl, se_lun_group);
402 struct config_item *df_item;
403 struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
404 int i;
405
406 ml_stat_grp = &lacl->ml_stat_grps.stat_group;
407 for (i = 0; ml_stat_grp->default_groups[i]; i++) {
408 df_item = &ml_stat_grp->default_groups[i]->cg_item;
409 ml_stat_grp->default_groups[i] = NULL;
410 config_item_put(df_item);
411 }
412 kfree(ml_stat_grp->default_groups);
413
414 lacl_cg = &lacl->se_lun_group;
415 for (i = 0; lacl_cg->default_groups[i]; i++) {
416 df_item = &lacl_cg->default_groups[i]->cg_item;
417 lacl_cg->default_groups[i] = NULL;
418 config_item_put(df_item);
419 }
420 kfree(lacl_cg->default_groups);
421
422 config_item_put(item);
423}
424
425static void target_fabric_nacl_base_release(struct config_item *item)
426{
427 struct se_node_acl *se_nacl = container_of(to_config_group(item),
428 struct se_node_acl, acl_group);
429 struct se_portal_group *se_tpg = se_nacl->se_tpg;
430 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
431
432 tf->tf_ops.fabric_drop_nodeacl(se_nacl);
433}
434
435static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
436 .release = target_fabric_nacl_base_release,
437 .show_attribute = target_fabric_nacl_base_attr_show,
438 .store_attribute = target_fabric_nacl_base_attr_store,
439};
440
441static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
442 .make_group = target_fabric_make_mappedlun,
443 .drop_item = target_fabric_drop_mappedlun,
444};
445
446TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
447 &target_fabric_nacl_base_group_ops, NULL);
448
449/* End of tfc_tpg_nacl_base_cit */
450
451/* Start of tfc_node_fabric_stats_cit */
452/*
453 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
454 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
455 */
456TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
457
458/* End of tfc_wwn_fabric_stats_cit */
459
460/* Start of tfc_tpg_nacl_cit */
461
462static struct config_group *target_fabric_make_nodeacl(
463 struct config_group *group,
464 const char *name)
465{
466 struct se_portal_group *se_tpg = container_of(group,
467 struct se_portal_group, tpg_acl_group);
468 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
469 struct se_node_acl *se_nacl;
470 struct config_group *nacl_cg;
471
472 if (!tf->tf_ops.fabric_make_nodeacl) {
473 pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
474 return ERR_PTR(-ENOSYS);
475 }
476
477 se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
478 if (IS_ERR(se_nacl))
479 return ERR_CAST(se_nacl);
480
481 nacl_cg = &se_nacl->acl_group;
482 nacl_cg->default_groups = se_nacl->acl_default_groups;
483 nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
484 nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
485 nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
486 nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
487 nacl_cg->default_groups[4] = NULL;
488
489 config_group_init_type_name(&se_nacl->acl_group, name,
490 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
491 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
492 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
493 config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
494 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
495 config_group_init_type_name(&se_nacl->acl_param_group, "param",
496 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
497 config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
498 "fabric_statistics",
499 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
500
501 return &se_nacl->acl_group;
502}
503
504static void target_fabric_drop_nodeacl(
505 struct config_group *group,
506 struct config_item *item)
507{
508 struct se_node_acl *se_nacl = container_of(to_config_group(item),
509 struct se_node_acl, acl_group);
510 struct config_item *df_item;
511 struct config_group *nacl_cg;
512 int i;
513
514 nacl_cg = &se_nacl->acl_group;
515 for (i = 0; nacl_cg->default_groups[i]; i++) {
516 df_item = &nacl_cg->default_groups[i]->cg_item;
517 nacl_cg->default_groups[i] = NULL;
518 config_item_put(df_item);
519 }
520 /*
521 * struct se_node_acl free is done in target_fabric_nacl_base_release()
522 */
523 config_item_put(item);
524}
525
526static struct configfs_group_operations target_fabric_nacl_group_ops = {
527 .make_group = target_fabric_make_nodeacl,
528 .drop_item = target_fabric_drop_nodeacl,
529};
530
531TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
532
533/* End of tfc_tpg_nacl_cit */
534
535/* Start of tfc_tpg_np_base_cit */
536
537CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
538
539static void target_fabric_np_base_release(struct config_item *item)
540{
541 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
542 struct se_tpg_np, tpg_np_group);
543 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
544 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
545
546 tf->tf_ops.fabric_drop_np(se_tpg_np);
547}
548
549static struct configfs_item_operations target_fabric_np_base_item_ops = {
550 .release = target_fabric_np_base_release,
551 .show_attribute = target_fabric_np_base_attr_show,
552 .store_attribute = target_fabric_np_base_attr_store,
553};
554
555TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
556
557/* End of tfc_tpg_np_base_cit */
558
559/* Start of tfc_tpg_np_cit */
560
561static struct config_group *target_fabric_make_np(
562 struct config_group *group,
563 const char *name)
564{
565 struct se_portal_group *se_tpg = container_of(group,
566 struct se_portal_group, tpg_np_group);
567 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
568 struct se_tpg_np *se_tpg_np;
569
570 if (!tf->tf_ops.fabric_make_np) {
571 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
572 return ERR_PTR(-ENOSYS);
573 }
574
575 se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
576 if (!se_tpg_np || IS_ERR(se_tpg_np))
577 return ERR_PTR(-EINVAL);
578
579 se_tpg_np->tpg_np_parent = se_tpg;
580 config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
581 &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
582
583 return &se_tpg_np->tpg_np_group;
584}
585
586static void target_fabric_drop_np(
587 struct config_group *group,
588 struct config_item *item)
589{
590 /*
591 * struct se_tpg_np is released via target_fabric_np_base_release()
592 */
593 config_item_put(item);
594}
595
596static struct configfs_group_operations target_fabric_np_group_ops = {
597 .make_group = &target_fabric_make_np,
598 .drop_item = &target_fabric_drop_np,
599};
600
601TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
602
603/* End of tfc_tpg_np_cit */
604
605/* Start of tfc_tpg_port_cit */
606
607CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
608#define TCM_PORT_ATTR(_name, _mode) \
609static struct target_fabric_port_attribute target_fabric_port_##_name = \
610 __CONFIGFS_EATTR(_name, _mode, \
611 target_fabric_port_show_attr_##_name, \
612 target_fabric_port_store_attr_##_name);
613
614#define TCM_PORT_ATTOR_RO(_name) \
615 __CONFIGFS_EATTR_RO(_name, \
616 target_fabric_port_show_attr_##_name);
617
618/*
619 * alua_tg_pt_gp
620 */
621static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
622 struct se_lun *lun,
623 char *page)
624{
625 if (!lun || !lun->lun_sep)
626 return -ENODEV;
627
628 return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
629}
630
631static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
632 struct se_lun *lun,
633 const char *page,
634 size_t count)
635{
636 if (!lun || !lun->lun_sep)
637 return -ENODEV;
638
639 return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
640}
641
642TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
643
644/*
645 * alua_tg_pt_offline
646 */
647static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
648 struct se_lun *lun,
649 char *page)
650{
651 if (!lun || !lun->lun_sep)
652 return -ENODEV;
653
654 return core_alua_show_offline_bit(lun, page);
655}
656
657static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
658 struct se_lun *lun,
659 const char *page,
660 size_t count)
661{
662 if (!lun || !lun->lun_sep)
663 return -ENODEV;
664
665 return core_alua_store_offline_bit(lun, page, count);
666}
667
668TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
669
670/*
671 * alua_tg_pt_status
672 */
673static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
674 struct se_lun *lun,
675 char *page)
676{
677 if (!lun || !lun->lun_sep)
678 return -ENODEV;
679
680 return core_alua_show_secondary_status(lun, page);
681}
682
683static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
684 struct se_lun *lun,
685 const char *page,
686 size_t count)
687{
688 if (!lun || !lun->lun_sep)
689 return -ENODEV;
690
691 return core_alua_store_secondary_status(lun, page, count);
692}
693
694TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
695
696/*
697 * alua_tg_pt_write_md
698 */
699static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
700 struct se_lun *lun,
701 char *page)
702{
703 if (!lun || !lun->lun_sep)
704 return -ENODEV;
705
706 return core_alua_show_secondary_write_metadata(lun, page);
707}
708
709static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
710 struct se_lun *lun,
711 const char *page,
712 size_t count)
713{
714 if (!lun || !lun->lun_sep)
715 return -ENODEV;
716
717 return core_alua_store_secondary_write_metadata(lun, page, count);
718}
719
720TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
721
722
723static struct configfs_attribute *target_fabric_port_attrs[] = {
724 &target_fabric_port_alua_tg_pt_gp.attr,
725 &target_fabric_port_alua_tg_pt_offline.attr,
726 &target_fabric_port_alua_tg_pt_status.attr,
727 &target_fabric_port_alua_tg_pt_write_md.attr,
728 NULL,
729};
730
731CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
732
733static int target_fabric_port_link(
734 struct config_item *lun_ci,
735 struct config_item *se_dev_ci)
736{
737 struct config_item *tpg_ci;
738 struct se_device *dev;
739 struct se_lun *lun = container_of(to_config_group(lun_ci),
740 struct se_lun, lun_group);
741 struct se_lun *lun_p;
742 struct se_portal_group *se_tpg;
743 struct se_subsystem_dev *se_dev = container_of(
744 to_config_group(se_dev_ci), struct se_subsystem_dev,
745 se_dev_group);
746 struct target_fabric_configfs *tf;
747 int ret;
748
749 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
750 se_tpg = container_of(to_config_group(tpg_ci),
751 struct se_portal_group, tpg_group);
752 tf = se_tpg->se_tpg_wwn->wwn_tf;
753
754 if (lun->lun_se_dev != NULL) {
755 pr_err("Port Symlink already exists\n");
756 return -EEXIST;
757 }
758
759 dev = se_dev->se_dev_ptr;
760 if (!dev) {
761 pr_err("Unable to locate struct se_device pointer from"
762 " %s\n", config_item_name(se_dev_ci));
763 ret = -ENODEV;
764 goto out;
765 }
766
767 lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
768 lun->unpacked_lun);
769 if (IS_ERR(lun_p)) {
770 pr_err("core_dev_add_lun() failed\n");
771 ret = PTR_ERR(lun_p);
772 goto out;
773 }
774
775 if (tf->tf_ops.fabric_post_link) {
776 /*
777 * Call the optional fabric_post_link() to allow a
778 * fabric module to setup any additional state once
779 * core_dev_add_lun() has been called..
780 */
781 tf->tf_ops.fabric_post_link(se_tpg, lun);
782 }
783
784 return 0;
785out:
786 return ret;
787}
788
789static int target_fabric_port_unlink(
790 struct config_item *lun_ci,
791 struct config_item *se_dev_ci)
792{
793 struct se_lun *lun = container_of(to_config_group(lun_ci),
794 struct se_lun, lun_group);
795 struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
796 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
797
798 if (tf->tf_ops.fabric_pre_unlink) {
799 /*
800 * Call the optional fabric_pre_unlink() to allow a
801 * fabric module to release any additional stat before
802 * core_dev_del_lun() is called.
803 */
804 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
805 }
806
807 core_dev_del_lun(se_tpg, lun->unpacked_lun);
808 return 0;
809}
810
811static struct configfs_item_operations target_fabric_port_item_ops = {
812 .show_attribute = target_fabric_port_attr_show,
813 .store_attribute = target_fabric_port_attr_store,
814 .allow_link = target_fabric_port_link,
815 .drop_link = target_fabric_port_unlink,
816};
817
818TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
819
820/* End of tfc_tpg_port_cit */
821
822/* Start of tfc_tpg_port_stat_cit */
823
824static struct config_group *target_core_port_stat_mkdir(
825 struct config_group *group,
826 const char *name)
827{
828 return ERR_PTR(-ENOSYS);
829}
830
831static void target_core_port_stat_rmdir(
832 struct config_group *group,
833 struct config_item *item)
834{
835 return;
836}
837
838static struct configfs_group_operations target_fabric_port_stat_group_ops = {
839 .make_group = target_core_port_stat_mkdir,
840 .drop_item = target_core_port_stat_rmdir,
841};
842
843TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
844
845/* End of tfc_tpg_port_stat_cit */
846
847/* Start of tfc_tpg_lun_cit */
848
849static struct config_group *target_fabric_make_lun(
850 struct config_group *group,
851 const char *name)
852{
853 struct se_lun *lun;
854 struct se_portal_group *se_tpg = container_of(group,
855 struct se_portal_group, tpg_lun_group);
856 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
857 struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
858 unsigned long unpacked_lun;
859 int errno;
860
861 if (strstr(name, "lun_") != name) {
862 pr_err("Unable to locate \'_\" in"
863 " \"lun_$LUN_NUMBER\"\n");
864 return ERR_PTR(-EINVAL);
865 }
866 if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
867 return ERR_PTR(-EINVAL);
868
869 lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
870 if (!lun)
871 return ERR_PTR(-EINVAL);
872
873 lun_cg = &lun->lun_group;
874 lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
875 GFP_KERNEL);
876 if (!lun_cg->default_groups) {
877 pr_err("Unable to allocate lun_cg->default_groups\n");
878 return ERR_PTR(-ENOMEM);
879 }
880
881 config_group_init_type_name(&lun->lun_group, name,
882 &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
883 config_group_init_type_name(&lun->port_stat_grps.stat_group,
884 "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
885 lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
886 lun_cg->default_groups[1] = NULL;
887
888 port_stat_grp = &lun->port_stat_grps.stat_group;
889 port_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
890 GFP_KERNEL);
891 if (!port_stat_grp->default_groups) {
892 pr_err("Unable to allocate port_stat_grp->default_groups\n");
893 errno = -ENOMEM;
894 goto out;
895 }
896 target_stat_setup_port_default_groups(lun);
897
898 return &lun->lun_group;
899out:
900 if (lun_cg)
901 kfree(lun_cg->default_groups);
902 return ERR_PTR(errno);
903}
904
905static void target_fabric_drop_lun(
906 struct config_group *group,
907 struct config_item *item)
908{
909 struct se_lun *lun = container_of(to_config_group(item),
910 struct se_lun, lun_group);
911 struct config_item *df_item;
912 struct config_group *lun_cg, *port_stat_grp;
913 int i;
914
915 port_stat_grp = &lun->port_stat_grps.stat_group;
916 for (i = 0; port_stat_grp->default_groups[i]; i++) {
917 df_item = &port_stat_grp->default_groups[i]->cg_item;
918 port_stat_grp->default_groups[i] = NULL;
919 config_item_put(df_item);
920 }
921 kfree(port_stat_grp->default_groups);
922
923 lun_cg = &lun->lun_group;
924 for (i = 0; lun_cg->default_groups[i]; i++) {
925 df_item = &lun_cg->default_groups[i]->cg_item;
926 lun_cg->default_groups[i] = NULL;
927 config_item_put(df_item);
928 }
929 kfree(lun_cg->default_groups);
930
931 config_item_put(item);
932}
933
934static struct configfs_group_operations target_fabric_lun_group_ops = {
935 .make_group = &target_fabric_make_lun,
936 .drop_item = &target_fabric_drop_lun,
937};
938
939TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
940
941/* End of tfc_tpg_lun_cit */
942
943/* Start of tfc_tpg_attrib_cit */
944
945CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
946
947static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
948 .show_attribute = target_fabric_tpg_attrib_attr_show,
949 .store_attribute = target_fabric_tpg_attrib_attr_store,
950};
951
952TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
953
954/* End of tfc_tpg_attrib_cit */
955
956/* Start of tfc_tpg_param_cit */
957
958CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
959
960static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
961 .show_attribute = target_fabric_tpg_param_attr_show,
962 .store_attribute = target_fabric_tpg_param_attr_store,
963};
964
965TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
966
967/* End of tfc_tpg_param_cit */
968
969/* Start of tfc_tpg_base_cit */
970/*
971 * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
972 */
973CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
974
975static void target_fabric_tpg_release(struct config_item *item)
976{
977 struct se_portal_group *se_tpg = container_of(to_config_group(item),
978 struct se_portal_group, tpg_group);
979 struct se_wwn *wwn = se_tpg->se_tpg_wwn;
980 struct target_fabric_configfs *tf = wwn->wwn_tf;
981
982 tf->tf_ops.fabric_drop_tpg(se_tpg);
983}
984
985static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
986 .release = target_fabric_tpg_release,
987 .show_attribute = target_fabric_tpg_attr_show,
988 .store_attribute = target_fabric_tpg_attr_store,
989};
990
991TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
992
993/* End of tfc_tpg_base_cit */
994
995/* Start of tfc_tpg_cit */
996
997static struct config_group *target_fabric_make_tpg(
998 struct config_group *group,
999 const char *name)
1000{
1001 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1002 struct target_fabric_configfs *tf = wwn->wwn_tf;
1003 struct se_portal_group *se_tpg;
1004
1005 if (!tf->tf_ops.fabric_make_tpg) {
1006 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1007 return ERR_PTR(-ENOSYS);
1008 }
1009
1010 se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1011 if (!se_tpg || IS_ERR(se_tpg))
1012 return ERR_PTR(-EINVAL);
1013 /*
1014 * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1015 */
1016 se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1017 se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1018 se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1019 se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1020 se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1021 se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
1022 se_tpg->tpg_group.default_groups[5] = NULL;
1023
1024 config_group_init_type_name(&se_tpg->tpg_group, name,
1025 &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
1026 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1027 &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
1028 config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1029 &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
1030 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1031 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
1032 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1033 &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
1034 config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1035 &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
1036
1037 return &se_tpg->tpg_group;
1038}
1039
1040static void target_fabric_drop_tpg(
1041 struct config_group *group,
1042 struct config_item *item)
1043{
1044 struct se_portal_group *se_tpg = container_of(to_config_group(item),
1045 struct se_portal_group, tpg_group);
1046 struct config_group *tpg_cg = &se_tpg->tpg_group;
1047 struct config_item *df_item;
1048 int i;
1049 /*
1050 * Release default groups, but do not release tpg_cg->default_groups
1051 * memory as it is statically allocated at se_tpg->tpg_default_groups.
1052 */
1053 for (i = 0; tpg_cg->default_groups[i]; i++) {
1054 df_item = &tpg_cg->default_groups[i]->cg_item;
1055 tpg_cg->default_groups[i] = NULL;
1056 config_item_put(df_item);
1057 }
1058
1059 config_item_put(item);
1060}
1061
1062static void target_fabric_release_wwn(struct config_item *item)
1063{
1064 struct se_wwn *wwn = container_of(to_config_group(item),
1065 struct se_wwn, wwn_group);
1066 struct target_fabric_configfs *tf = wwn->wwn_tf;
1067
1068 tf->tf_ops.fabric_drop_wwn(wwn);
1069}
1070
1071static struct configfs_item_operations target_fabric_tpg_item_ops = {
1072 .release = target_fabric_release_wwn,
1073};
1074
1075static struct configfs_group_operations target_fabric_tpg_group_ops = {
1076 .make_group = target_fabric_make_tpg,
1077 .drop_item = target_fabric_drop_tpg,
1078};
1079
1080TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1081 NULL);
1082
1083/* End of tfc_tpg_cit */
1084
1085/* Start of tfc_wwn_fabric_stats_cit */
1086/*
1087 * This is used as a placeholder for struct se_wwn->fabric_stat_group
1088 * to allow fabrics access to ->fabric_stat_group->default_groups[]
1089 */
1090TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1091
1092/* End of tfc_wwn_fabric_stats_cit */
1093
1094/* Start of tfc_wwn_cit */
1095
1096static struct config_group *target_fabric_make_wwn(
1097 struct config_group *group,
1098 const char *name)
1099{
1100 struct target_fabric_configfs *tf = container_of(group,
1101 struct target_fabric_configfs, tf_group);
1102 struct se_wwn *wwn;
1103
1104 if (!tf->tf_ops.fabric_make_wwn) {
1105 pr_err("tf->tf_ops.fabric_make_wwn is NULL\n");
1106 return ERR_PTR(-ENOSYS);
1107 }
1108
1109 wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
1110 if (!wwn || IS_ERR(wwn))
1111 return ERR_PTR(-EINVAL);
1112
1113 wwn->wwn_tf = tf;
1114 /*
1115 * Setup default groups from pre-allocated wwn->wwn_default_groups
1116 */
1117 wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1118 wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1119 wwn->wwn_group.default_groups[1] = NULL;
1120
1121 config_group_init_type_name(&wwn->wwn_group, name,
1122 &TF_CIT_TMPL(tf)->tfc_tpg_cit);
1123 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1124 &TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
1125
1126 return &wwn->wwn_group;
1127}
1128
1129static void target_fabric_drop_wwn(
1130 struct config_group *group,
1131 struct config_item *item)
1132{
1133 struct se_wwn *wwn = container_of(to_config_group(item),
1134 struct se_wwn, wwn_group);
1135 struct config_item *df_item;
1136 struct config_group *cg = &wwn->wwn_group;
1137 int i;
1138
1139 for (i = 0; cg->default_groups[i]; i++) {
1140 df_item = &cg->default_groups[i]->cg_item;
1141 cg->default_groups[i] = NULL;
1142 config_item_put(df_item);
1143 }
1144
1145 config_item_put(item);
1146}
1147
1148static struct configfs_group_operations target_fabric_wwn_group_ops = {
1149 .make_group = target_fabric_make_wwn,
1150 .drop_item = target_fabric_drop_wwn,
1151};
1152/*
1153 * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1154 */
1155CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1156
1157static struct configfs_item_operations target_fabric_wwn_item_ops = {
1158 .show_attribute = target_fabric_wwn_attr_show,
1159 .store_attribute = target_fabric_wwn_attr_store,
1160};
1161
1162TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
1163
1164/* End of tfc_wwn_cit */
1165
1166/* Start of tfc_discovery_cit */
1167
1168CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1169 tf_disc_group);
1170
1171static struct configfs_item_operations target_fabric_discovery_item_ops = {
1172 .show_attribute = target_fabric_discovery_attr_show,
1173 .store_attribute = target_fabric_discovery_attr_store,
1174};
1175
1176TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1177
1178/* End of tfc_discovery_cit */
1179
1180int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1181{
1182 target_fabric_setup_discovery_cit(tf);
1183 target_fabric_setup_wwn_cit(tf);
1184 target_fabric_setup_wwn_fabric_stats_cit(tf);
1185 target_fabric_setup_tpg_cit(tf);
1186 target_fabric_setup_tpg_base_cit(tf);
1187 target_fabric_setup_tpg_port_cit(tf);
1188 target_fabric_setup_tpg_port_stat_cit(tf);
1189 target_fabric_setup_tpg_lun_cit(tf);
1190 target_fabric_setup_tpg_np_cit(tf);
1191 target_fabric_setup_tpg_np_base_cit(tf);
1192 target_fabric_setup_tpg_attrib_cit(tf);
1193 target_fabric_setup_tpg_param_cit(tf);
1194 target_fabric_setup_tpg_nacl_cit(tf);
1195 target_fabric_setup_tpg_nacl_base_cit(tf);
1196 target_fabric_setup_tpg_nacl_attrib_cit(tf);
1197 target_fabric_setup_tpg_nacl_auth_cit(tf);
1198 target_fabric_setup_tpg_nacl_param_cit(tf);
1199 target_fabric_setup_tpg_nacl_stat_cit(tf);
1200 target_fabric_setup_tpg_mappedlun_cit(tf);
1201 target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1202
1203 return 0;
1204}