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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 <linux/version.h>
26#include <generated/utsrelease.h>
27#include <linux/utsname.h>
28#include <linux/init.h>
29#include <linux/fs.h>
30#include <linux/namei.h>
31#include <linux/slab.h>
32#include <linux/types.h>
33#include <linux/delay.h>
34#include <linux/unistd.h>
35#include <linux/string.h>
36#include <linux/syscalls.h>
37#include <linux/configfs.h>
38
39#include <target/target_core_base.h>
40#include <target/target_core_device.h>
41#include <target/target_core_tpg.h>
42#include <target/target_core_transport.h>
43#include <target/target_core_fabric_ops.h>
44#include <target/target_core_fabric_configfs.h>
45#include <target/target_core_configfs.h>
46#include <target/configfs_macros.h>
47
48#include "target_core_alua.h"
49#include "target_core_hba.h"
50#include "target_core_pr.h"
51#include "target_core_stat.h"
52
53#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
54static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
55{ \
56 struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
57 struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = _attrs; \
62 cit->ct_owner = tf->tf_module; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64}
65
66/* Start of tfc_tpg_mappedlun_cit */
67
68static int target_fabric_mappedlun_link(
69 struct config_item *lun_acl_ci,
70 struct config_item *lun_ci)
71{
72 struct se_dev_entry *deve;
73 struct se_lun *lun = container_of(to_config_group(lun_ci),
74 struct se_lun, lun_group);
75 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
76 struct se_lun_acl, se_lun_group);
77 struct se_portal_group *se_tpg;
78 struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
79 int ret = 0, lun_access;
80 /*
81 * Ensure that the source port exists
82 */
83 if (!lun->lun_sep || !lun->lun_sep->sep_tpg) {
84 pr_err("Source se_lun->lun_sep or lun->lun_sep->sep"
85 "_tpg does not exist\n");
86 return -EINVAL;
87 }
88 se_tpg = lun->lun_sep->sep_tpg;
89
90 nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
91 tpg_ci = &nacl_ci->ci_group->cg_item;
92 wwn_ci = &tpg_ci->ci_group->cg_item;
93 tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
94 wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
95 /*
96 * Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
97 */
98 if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
99 pr_err("Illegal Initiator ACL SymLink outside of %s\n",
100 config_item_name(wwn_ci));
101 return -EINVAL;
102 }
103 if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
104 pr_err("Illegal Initiator ACL Symlink outside of %s"
105 " TPGT: %s\n", config_item_name(wwn_ci),
106 config_item_name(tpg_ci));
107 return -EINVAL;
108 }
109 /*
110 * If this struct se_node_acl was dynamically generated with
111 * tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
112 * which be will write protected (READ-ONLY) when
113 * tpg_1/attrib/demo_mode_write_protect=1
114 */
115 spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
116 deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
117 if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
118 lun_access = deve->lun_flags;
119 else
120 lun_access =
121 (se_tpg->se_tpg_tfo->tpg_check_prod_mode_write_protect(
122 se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
123 TRANSPORT_LUNFLAGS_READ_WRITE;
124 spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
125 /*
126 * Determine the actual mapped LUN value user wants..
127 *
128 * This value is what the SCSI Initiator actually sees the
129 * iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
130 */
131 ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
132 lun->unpacked_lun, lun_access);
133
134 return (ret < 0) ? -EINVAL : 0;
135}
136
137static int target_fabric_mappedlun_unlink(
138 struct config_item *lun_acl_ci,
139 struct config_item *lun_ci)
140{
141 struct se_lun *lun;
142 struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
143 struct se_lun_acl, se_lun_group);
144 struct se_node_acl *nacl = lacl->se_lun_nacl;
145 struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
146 struct se_portal_group *se_tpg;
147 /*
148 * Determine if the underlying MappedLUN has already been released..
149 */
150 if (!deve->se_lun)
151 return 0;
152
153 lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
154 se_tpg = lun->lun_sep->sep_tpg;
155
156 core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
157 return 0;
158}
159
160CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
161#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
162static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
163 __CONFIGFS_EATTR(_name, _mode, \
164 target_fabric_mappedlun_show_##_name, \
165 target_fabric_mappedlun_store_##_name);
166
167static ssize_t target_fabric_mappedlun_show_write_protect(
168 struct se_lun_acl *lacl,
169 char *page)
170{
171 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
172 struct se_dev_entry *deve;
173 ssize_t len;
174
175 spin_lock_irq(&se_nacl->device_list_lock);
176 deve = &se_nacl->device_list[lacl->mapped_lun];
177 len = sprintf(page, "%d\n",
178 (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
179 1 : 0);
180 spin_unlock_irq(&se_nacl->device_list_lock);
181
182 return len;
183}
184
185static ssize_t target_fabric_mappedlun_store_write_protect(
186 struct se_lun_acl *lacl,
187 const char *page,
188 size_t count)
189{
190 struct se_node_acl *se_nacl = lacl->se_lun_nacl;
191 struct se_portal_group *se_tpg = se_nacl->se_tpg;
192 unsigned long op;
193
194 if (strict_strtoul(page, 0, &op))
195 return -EINVAL;
196
197 if ((op != 1) && (op != 0))
198 return -EINVAL;
199
200 core_update_device_list_access(lacl->mapped_lun, (op) ?
201 TRANSPORT_LUNFLAGS_READ_ONLY :
202 TRANSPORT_LUNFLAGS_READ_WRITE,
203 lacl->se_lun_nacl);
204
205 pr_debug("%s_ConfigFS: Changed Initiator ACL: %s"
206 " Mapped LUN: %u Write Protect bit to %s\n",
207 se_tpg->se_tpg_tfo->get_fabric_name(),
208 lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
209
210 return count;
211
212}
213
214TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
215
216CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
217
218static void target_fabric_mappedlun_release(struct config_item *item)
219{
220 struct se_lun_acl *lacl = container_of(to_config_group(item),
221 struct se_lun_acl, se_lun_group);
222 struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
223
224 core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
225}
226
227static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
228 &target_fabric_mappedlun_write_protect.attr,
229 NULL,
230};
231
232static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
233 .release = target_fabric_mappedlun_release,
234 .show_attribute = target_fabric_mappedlun_attr_show,
235 .store_attribute = target_fabric_mappedlun_attr_store,
236 .allow_link = target_fabric_mappedlun_link,
237 .drop_link = target_fabric_mappedlun_unlink,
238};
239
240TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
241 target_fabric_mappedlun_attrs);
242
243/* End of tfc_tpg_mappedlun_cit */
244
245/* Start of tfc_tpg_mappedlun_port_cit */
246
247static struct config_group *target_core_mappedlun_stat_mkdir(
248 struct config_group *group,
249 const char *name)
250{
251 return ERR_PTR(-ENOSYS);
252}
253
254static void target_core_mappedlun_stat_rmdir(
255 struct config_group *group,
256 struct config_item *item)
257{
258 return;
259}
260
261static struct configfs_group_operations target_fabric_mappedlun_stat_group_ops = {
262 .make_group = target_core_mappedlun_stat_mkdir,
263 .drop_item = target_core_mappedlun_stat_rmdir,
264};
265
266TF_CIT_SETUP(tpg_mappedlun_stat, NULL, &target_fabric_mappedlun_stat_group_ops,
267 NULL);
268
269/* End of tfc_tpg_mappedlun_port_cit */
270
271/* Start of tfc_tpg_nacl_attrib_cit */
272
273CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
274
275static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
276 .show_attribute = target_fabric_nacl_attrib_attr_show,
277 .store_attribute = target_fabric_nacl_attrib_attr_store,
278};
279
280TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
281
282/* End of tfc_tpg_nacl_attrib_cit */
283
284/* Start of tfc_tpg_nacl_auth_cit */
285
286CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
287
288static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
289 .show_attribute = target_fabric_nacl_auth_attr_show,
290 .store_attribute = target_fabric_nacl_auth_attr_store,
291};
292
293TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
294
295/* End of tfc_tpg_nacl_auth_cit */
296
297/* Start of tfc_tpg_nacl_param_cit */
298
299CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
300
301static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
302 .show_attribute = target_fabric_nacl_param_attr_show,
303 .store_attribute = target_fabric_nacl_param_attr_store,
304};
305
306TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
307
308/* End of tfc_tpg_nacl_param_cit */
309
310/* Start of tfc_tpg_nacl_base_cit */
311
312CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
313
314static struct config_group *target_fabric_make_mappedlun(
315 struct config_group *group,
316 const char *name)
317{
318 struct se_node_acl *se_nacl = container_of(group,
319 struct se_node_acl, acl_group);
320 struct se_portal_group *se_tpg = se_nacl->se_tpg;
321 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
322 struct se_lun_acl *lacl;
323 struct config_item *acl_ci;
324 struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
325 char *buf;
326 unsigned long mapped_lun;
327 int ret = 0;
328
329 acl_ci = &group->cg_item;
330 if (!acl_ci) {
331 pr_err("Unable to locatel acl_ci\n");
332 return NULL;
333 }
334
335 buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
336 if (!buf) {
337 pr_err("Unable to allocate memory for name buf\n");
338 return ERR_PTR(-ENOMEM);
339 }
340 snprintf(buf, strlen(name) + 1, "%s", name);
341 /*
342 * Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
343 */
344 if (strstr(buf, "lun_") != buf) {
345 pr_err("Unable to locate \"lun_\" from buf: %s"
346 " name: %s\n", buf, name);
347 ret = -EINVAL;
348 goto out;
349 }
350 /*
351 * Determine the Mapped LUN value. This is what the SCSI Initiator
352 * Port will actually see.
353 */
354 if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
355 ret = -EINVAL;
356 goto out;
357 }
358
359 lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
360 config_item_name(acl_ci), &ret);
361 if (!lacl) {
362 ret = -EINVAL;
363 goto out;
364 }
365
366 lacl_cg = &lacl->se_lun_group;
367 lacl_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
368 GFP_KERNEL);
369 if (!lacl_cg->default_groups) {
370 pr_err("Unable to allocate lacl_cg->default_groups\n");
371 ret = -ENOMEM;
372 goto out;
373 }
374
375 config_group_init_type_name(&lacl->se_lun_group, name,
376 &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
377 config_group_init_type_name(&lacl->ml_stat_grps.stat_group,
378 "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_stat_cit);
379 lacl_cg->default_groups[0] = &lacl->ml_stat_grps.stat_group;
380 lacl_cg->default_groups[1] = NULL;
381
382 ml_stat_grp = &lacl->ml_stat_grps.stat_group;
383 ml_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
384 GFP_KERNEL);
385 if (!ml_stat_grp->default_groups) {
386 pr_err("Unable to allocate ml_stat_grp->default_groups\n");
387 ret = -ENOMEM;
388 goto out;
389 }
390 target_stat_setup_mappedlun_default_groups(lacl);
391
392 kfree(buf);
393 return &lacl->se_lun_group;
394out:
395 if (lacl_cg)
396 kfree(lacl_cg->default_groups);
397 kfree(buf);
398 return ERR_PTR(ret);
399}
400
401static void target_fabric_drop_mappedlun(
402 struct config_group *group,
403 struct config_item *item)
404{
405 struct se_lun_acl *lacl = container_of(to_config_group(item),
406 struct se_lun_acl, se_lun_group);
407 struct config_item *df_item;
408 struct config_group *lacl_cg = NULL, *ml_stat_grp = NULL;
409 int i;
410
411 ml_stat_grp = &lacl->ml_stat_grps.stat_group;
412 for (i = 0; ml_stat_grp->default_groups[i]; i++) {
413 df_item = &ml_stat_grp->default_groups[i]->cg_item;
414 ml_stat_grp->default_groups[i] = NULL;
415 config_item_put(df_item);
416 }
417 kfree(ml_stat_grp->default_groups);
418
419 lacl_cg = &lacl->se_lun_group;
420 for (i = 0; lacl_cg->default_groups[i]; i++) {
421 df_item = &lacl_cg->default_groups[i]->cg_item;
422 lacl_cg->default_groups[i] = NULL;
423 config_item_put(df_item);
424 }
425 kfree(lacl_cg->default_groups);
426
427 config_item_put(item);
428}
429
430static void target_fabric_nacl_base_release(struct config_item *item)
431{
432 struct se_node_acl *se_nacl = container_of(to_config_group(item),
433 struct se_node_acl, acl_group);
434 struct se_portal_group *se_tpg = se_nacl->se_tpg;
435 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
436
437 tf->tf_ops.fabric_drop_nodeacl(se_nacl);
438}
439
440static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
441 .release = target_fabric_nacl_base_release,
442 .show_attribute = target_fabric_nacl_base_attr_show,
443 .store_attribute = target_fabric_nacl_base_attr_store,
444};
445
446static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
447 .make_group = target_fabric_make_mappedlun,
448 .drop_item = target_fabric_drop_mappedlun,
449};
450
451TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
452 &target_fabric_nacl_base_group_ops, NULL);
453
454/* End of tfc_tpg_nacl_base_cit */
455
456/* Start of tfc_node_fabric_stats_cit */
457/*
458 * This is used as a placeholder for struct se_node_acl->acl_fabric_stat_group
459 * to allow fabrics access to ->acl_fabric_stat_group->default_groups[]
460 */
461TF_CIT_SETUP(tpg_nacl_stat, NULL, NULL, NULL);
462
463/* End of tfc_wwn_fabric_stats_cit */
464
465/* Start of tfc_tpg_nacl_cit */
466
467static struct config_group *target_fabric_make_nodeacl(
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_acl_group);
473 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
474 struct se_node_acl *se_nacl;
475 struct config_group *nacl_cg;
476
477 if (!tf->tf_ops.fabric_make_nodeacl) {
478 pr_err("tf->tf_ops.fabric_make_nodeacl is NULL\n");
479 return ERR_PTR(-ENOSYS);
480 }
481
482 se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
483 if (IS_ERR(se_nacl))
484 return ERR_CAST(se_nacl);
485
486 nacl_cg = &se_nacl->acl_group;
487 nacl_cg->default_groups = se_nacl->acl_default_groups;
488 nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
489 nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
490 nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
491 nacl_cg->default_groups[3] = &se_nacl->acl_fabric_stat_group;
492 nacl_cg->default_groups[4] = NULL;
493
494 config_group_init_type_name(&se_nacl->acl_group, name,
495 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
496 config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
497 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
498 config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
499 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
500 config_group_init_type_name(&se_nacl->acl_param_group, "param",
501 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
502 config_group_init_type_name(&se_nacl->acl_fabric_stat_group,
503 "fabric_statistics",
504 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_stat_cit);
505
506 return &se_nacl->acl_group;
507}
508
509static void target_fabric_drop_nodeacl(
510 struct config_group *group,
511 struct config_item *item)
512{
513 struct se_node_acl *se_nacl = container_of(to_config_group(item),
514 struct se_node_acl, acl_group);
515 struct config_item *df_item;
516 struct config_group *nacl_cg;
517 int i;
518
519 nacl_cg = &se_nacl->acl_group;
520 for (i = 0; nacl_cg->default_groups[i]; i++) {
521 df_item = &nacl_cg->default_groups[i]->cg_item;
522 nacl_cg->default_groups[i] = NULL;
523 config_item_put(df_item);
524 }
525 /*
526 * struct se_node_acl free is done in target_fabric_nacl_base_release()
527 */
528 config_item_put(item);
529}
530
531static struct configfs_group_operations target_fabric_nacl_group_ops = {
532 .make_group = target_fabric_make_nodeacl,
533 .drop_item = target_fabric_drop_nodeacl,
534};
535
536TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
537
538/* End of tfc_tpg_nacl_cit */
539
540/* Start of tfc_tpg_np_base_cit */
541
542CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
543
544static void target_fabric_np_base_release(struct config_item *item)
545{
546 struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
547 struct se_tpg_np, tpg_np_group);
548 struct se_portal_group *se_tpg = se_tpg_np->tpg_np_parent;
549 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
550
551 tf->tf_ops.fabric_drop_np(se_tpg_np);
552}
553
554static struct configfs_item_operations target_fabric_np_base_item_ops = {
555 .release = target_fabric_np_base_release,
556 .show_attribute = target_fabric_np_base_attr_show,
557 .store_attribute = target_fabric_np_base_attr_store,
558};
559
560TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
561
562/* End of tfc_tpg_np_base_cit */
563
564/* Start of tfc_tpg_np_cit */
565
566static struct config_group *target_fabric_make_np(
567 struct config_group *group,
568 const char *name)
569{
570 struct se_portal_group *se_tpg = container_of(group,
571 struct se_portal_group, tpg_np_group);
572 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
573 struct se_tpg_np *se_tpg_np;
574
575 if (!tf->tf_ops.fabric_make_np) {
576 pr_err("tf->tf_ops.fabric_make_np is NULL\n");
577 return ERR_PTR(-ENOSYS);
578 }
579
580 se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
581 if (!se_tpg_np || IS_ERR(se_tpg_np))
582 return ERR_PTR(-EINVAL);
583
584 se_tpg_np->tpg_np_parent = se_tpg;
585 config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
586 &TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
587
588 return &se_tpg_np->tpg_np_group;
589}
590
591static void target_fabric_drop_np(
592 struct config_group *group,
593 struct config_item *item)
594{
595 /*
596 * struct se_tpg_np is released via target_fabric_np_base_release()
597 */
598 config_item_put(item);
599}
600
601static struct configfs_group_operations target_fabric_np_group_ops = {
602 .make_group = &target_fabric_make_np,
603 .drop_item = &target_fabric_drop_np,
604};
605
606TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
607
608/* End of tfc_tpg_np_cit */
609
610/* Start of tfc_tpg_port_cit */
611
612CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
613#define TCM_PORT_ATTR(_name, _mode) \
614static struct target_fabric_port_attribute target_fabric_port_##_name = \
615 __CONFIGFS_EATTR(_name, _mode, \
616 target_fabric_port_show_attr_##_name, \
617 target_fabric_port_store_attr_##_name);
618
619#define TCM_PORT_ATTOR_RO(_name) \
620 __CONFIGFS_EATTR_RO(_name, \
621 target_fabric_port_show_attr_##_name);
622
623/*
624 * alua_tg_pt_gp
625 */
626static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
627 struct se_lun *lun,
628 char *page)
629{
630 if (!lun || !lun->lun_sep)
631 return -ENODEV;
632
633 return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
634}
635
636static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
637 struct se_lun *lun,
638 const char *page,
639 size_t count)
640{
641 if (!lun || !lun->lun_sep)
642 return -ENODEV;
643
644 return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
645}
646
647TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
648
649/*
650 * alua_tg_pt_offline
651 */
652static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
653 struct se_lun *lun,
654 char *page)
655{
656 if (!lun || !lun->lun_sep)
657 return -ENODEV;
658
659 return core_alua_show_offline_bit(lun, page);
660}
661
662static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
663 struct se_lun *lun,
664 const char *page,
665 size_t count)
666{
667 if (!lun || !lun->lun_sep)
668 return -ENODEV;
669
670 return core_alua_store_offline_bit(lun, page, count);
671}
672
673TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
674
675/*
676 * alua_tg_pt_status
677 */
678static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
679 struct se_lun *lun,
680 char *page)
681{
682 if (!lun || !lun->lun_sep)
683 return -ENODEV;
684
685 return core_alua_show_secondary_status(lun, page);
686}
687
688static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
689 struct se_lun *lun,
690 const char *page,
691 size_t count)
692{
693 if (!lun || !lun->lun_sep)
694 return -ENODEV;
695
696 return core_alua_store_secondary_status(lun, page, count);
697}
698
699TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
700
701/*
702 * alua_tg_pt_write_md
703 */
704static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
705 struct se_lun *lun,
706 char *page)
707{
708 if (!lun || !lun->lun_sep)
709 return -ENODEV;
710
711 return core_alua_show_secondary_write_metadata(lun, page);
712}
713
714static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
715 struct se_lun *lun,
716 const char *page,
717 size_t count)
718{
719 if (!lun || !lun->lun_sep)
720 return -ENODEV;
721
722 return core_alua_store_secondary_write_metadata(lun, page, count);
723}
724
725TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
726
727
728static struct configfs_attribute *target_fabric_port_attrs[] = {
729 &target_fabric_port_alua_tg_pt_gp.attr,
730 &target_fabric_port_alua_tg_pt_offline.attr,
731 &target_fabric_port_alua_tg_pt_status.attr,
732 &target_fabric_port_alua_tg_pt_write_md.attr,
733 NULL,
734};
735
736CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
737
738static int target_fabric_port_link(
739 struct config_item *lun_ci,
740 struct config_item *se_dev_ci)
741{
742 struct config_item *tpg_ci;
743 struct se_device *dev;
744 struct se_lun *lun = container_of(to_config_group(lun_ci),
745 struct se_lun, lun_group);
746 struct se_lun *lun_p;
747 struct se_portal_group *se_tpg;
748 struct se_subsystem_dev *se_dev = container_of(
749 to_config_group(se_dev_ci), struct se_subsystem_dev,
750 se_dev_group);
751 struct target_fabric_configfs *tf;
752 int ret;
753
754 tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
755 se_tpg = container_of(to_config_group(tpg_ci),
756 struct se_portal_group, tpg_group);
757 tf = se_tpg->se_tpg_wwn->wwn_tf;
758
759 if (lun->lun_se_dev != NULL) {
760 pr_err("Port Symlink already exists\n");
761 return -EEXIST;
762 }
763
764 dev = se_dev->se_dev_ptr;
765 if (!dev) {
766 pr_err("Unable to locate struct se_device pointer from"
767 " %s\n", config_item_name(se_dev_ci));
768 ret = -ENODEV;
769 goto out;
770 }
771
772 lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
773 lun->unpacked_lun);
774 if (IS_ERR(lun_p) || !lun_p) {
775 pr_err("core_dev_add_lun() failed\n");
776 ret = -EINVAL;
777 goto out;
778 }
779
780 if (tf->tf_ops.fabric_post_link) {
781 /*
782 * Call the optional fabric_post_link() to allow a
783 * fabric module to setup any additional state once
784 * core_dev_add_lun() has been called..
785 */
786 tf->tf_ops.fabric_post_link(se_tpg, lun);
787 }
788
789 return 0;
790out:
791 return ret;
792}
793
794static int target_fabric_port_unlink(
795 struct config_item *lun_ci,
796 struct config_item *se_dev_ci)
797{
798 struct se_lun *lun = container_of(to_config_group(lun_ci),
799 struct se_lun, lun_group);
800 struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
801 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
802
803 if (tf->tf_ops.fabric_pre_unlink) {
804 /*
805 * Call the optional fabric_pre_unlink() to allow a
806 * fabric module to release any additional stat before
807 * core_dev_del_lun() is called.
808 */
809 tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
810 }
811
812 core_dev_del_lun(se_tpg, lun->unpacked_lun);
813 return 0;
814}
815
816static struct configfs_item_operations target_fabric_port_item_ops = {
817 .show_attribute = target_fabric_port_attr_show,
818 .store_attribute = target_fabric_port_attr_store,
819 .allow_link = target_fabric_port_link,
820 .drop_link = target_fabric_port_unlink,
821};
822
823TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
824
825/* End of tfc_tpg_port_cit */
826
827/* Start of tfc_tpg_port_stat_cit */
828
829static struct config_group *target_core_port_stat_mkdir(
830 struct config_group *group,
831 const char *name)
832{
833 return ERR_PTR(-ENOSYS);
834}
835
836static void target_core_port_stat_rmdir(
837 struct config_group *group,
838 struct config_item *item)
839{
840 return;
841}
842
843static struct configfs_group_operations target_fabric_port_stat_group_ops = {
844 .make_group = target_core_port_stat_mkdir,
845 .drop_item = target_core_port_stat_rmdir,
846};
847
848TF_CIT_SETUP(tpg_port_stat, NULL, &target_fabric_port_stat_group_ops, NULL);
849
850/* End of tfc_tpg_port_stat_cit */
851
852/* Start of tfc_tpg_lun_cit */
853
854static struct config_group *target_fabric_make_lun(
855 struct config_group *group,
856 const char *name)
857{
858 struct se_lun *lun;
859 struct se_portal_group *se_tpg = container_of(group,
860 struct se_portal_group, tpg_lun_group);
861 struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
862 struct config_group *lun_cg = NULL, *port_stat_grp = NULL;
863 unsigned long unpacked_lun;
864 int errno;
865
866 if (strstr(name, "lun_") != name) {
867 pr_err("Unable to locate \'_\" in"
868 " \"lun_$LUN_NUMBER\"\n");
869 return ERR_PTR(-EINVAL);
870 }
871 if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
872 return ERR_PTR(-EINVAL);
873
874 lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
875 if (!lun)
876 return ERR_PTR(-EINVAL);
877
878 lun_cg = &lun->lun_group;
879 lun_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
880 GFP_KERNEL);
881 if (!lun_cg->default_groups) {
882 pr_err("Unable to allocate lun_cg->default_groups\n");
883 return ERR_PTR(-ENOMEM);
884 }
885
886 config_group_init_type_name(&lun->lun_group, name,
887 &TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
888 config_group_init_type_name(&lun->port_stat_grps.stat_group,
889 "statistics", &TF_CIT_TMPL(tf)->tfc_tpg_port_stat_cit);
890 lun_cg->default_groups[0] = &lun->port_stat_grps.stat_group;
891 lun_cg->default_groups[1] = NULL;
892
893 port_stat_grp = &lun->port_stat_grps.stat_group;
894 port_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 3,
895 GFP_KERNEL);
896 if (!port_stat_grp->default_groups) {
897 pr_err("Unable to allocate port_stat_grp->default_groups\n");
898 errno = -ENOMEM;
899 goto out;
900 }
901 target_stat_setup_port_default_groups(lun);
902
903 return &lun->lun_group;
904out:
905 if (lun_cg)
906 kfree(lun_cg->default_groups);
907 return ERR_PTR(errno);
908}
909
910static void target_fabric_drop_lun(
911 struct config_group *group,
912 struct config_item *item)
913{
914 struct se_lun *lun = container_of(to_config_group(item),
915 struct se_lun, lun_group);
916 struct config_item *df_item;
917 struct config_group *lun_cg, *port_stat_grp;
918 int i;
919
920 port_stat_grp = &lun->port_stat_grps.stat_group;
921 for (i = 0; port_stat_grp->default_groups[i]; i++) {
922 df_item = &port_stat_grp->default_groups[i]->cg_item;
923 port_stat_grp->default_groups[i] = NULL;
924 config_item_put(df_item);
925 }
926 kfree(port_stat_grp->default_groups);
927
928 lun_cg = &lun->lun_group;
929 for (i = 0; lun_cg->default_groups[i]; i++) {
930 df_item = &lun_cg->default_groups[i]->cg_item;
931 lun_cg->default_groups[i] = NULL;
932 config_item_put(df_item);
933 }
934 kfree(lun_cg->default_groups);
935
936 config_item_put(item);
937}
938
939static struct configfs_group_operations target_fabric_lun_group_ops = {
940 .make_group = &target_fabric_make_lun,
941 .drop_item = &target_fabric_drop_lun,
942};
943
944TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
945
946/* End of tfc_tpg_lun_cit */
947
948/* Start of tfc_tpg_attrib_cit */
949
950CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
951
952static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
953 .show_attribute = target_fabric_tpg_attrib_attr_show,
954 .store_attribute = target_fabric_tpg_attrib_attr_store,
955};
956
957TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
958
959/* End of tfc_tpg_attrib_cit */
960
961/* Start of tfc_tpg_param_cit */
962
963CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
964
965static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
966 .show_attribute = target_fabric_tpg_param_attr_show,
967 .store_attribute = target_fabric_tpg_param_attr_store,
968};
969
970TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
971
972/* End of tfc_tpg_param_cit */
973
974/* Start of tfc_tpg_base_cit */
975/*
976 * For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
977 */
978CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
979
980static void target_fabric_tpg_release(struct config_item *item)
981{
982 struct se_portal_group *se_tpg = container_of(to_config_group(item),
983 struct se_portal_group, tpg_group);
984 struct se_wwn *wwn = se_tpg->se_tpg_wwn;
985 struct target_fabric_configfs *tf = wwn->wwn_tf;
986
987 tf->tf_ops.fabric_drop_tpg(se_tpg);
988}
989
990static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
991 .release = target_fabric_tpg_release,
992 .show_attribute = target_fabric_tpg_attr_show,
993 .store_attribute = target_fabric_tpg_attr_store,
994};
995
996TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
997
998/* End of tfc_tpg_base_cit */
999
1000/* Start of tfc_tpg_cit */
1001
1002static struct config_group *target_fabric_make_tpg(
1003 struct config_group *group,
1004 const char *name)
1005{
1006 struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
1007 struct target_fabric_configfs *tf = wwn->wwn_tf;
1008 struct se_portal_group *se_tpg;
1009
1010 if (!tf->tf_ops.fabric_make_tpg) {
1011 pr_err("tf->tf_ops.fabric_make_tpg is NULL\n");
1012 return ERR_PTR(-ENOSYS);
1013 }
1014
1015 se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
1016 if (!se_tpg || IS_ERR(se_tpg))
1017 return ERR_PTR(-EINVAL);
1018 /*
1019 * Setup default groups from pre-allocated se_tpg->tpg_default_groups
1020 */
1021 se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
1022 se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
1023 se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
1024 se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
1025 se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
1026 se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
1027 se_tpg->tpg_group.default_groups[5] = NULL;
1028
1029 config_group_init_type_name(&se_tpg->tpg_group, name,
1030 &TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
1031 config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
1032 &TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
1033 config_group_init_type_name(&se_tpg->tpg_np_group, "np",
1034 &TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
1035 config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
1036 &TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
1037 config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
1038 &TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
1039 config_group_init_type_name(&se_tpg->tpg_param_group, "param",
1040 &TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
1041
1042 return &se_tpg->tpg_group;
1043}
1044
1045static void target_fabric_drop_tpg(
1046 struct config_group *group,
1047 struct config_item *item)
1048{
1049 struct se_portal_group *se_tpg = container_of(to_config_group(item),
1050 struct se_portal_group, tpg_group);
1051 struct config_group *tpg_cg = &se_tpg->tpg_group;
1052 struct config_item *df_item;
1053 int i;
1054 /*
1055 * Release default groups, but do not release tpg_cg->default_groups
1056 * memory as it is statically allocated at se_tpg->tpg_default_groups.
1057 */
1058 for (i = 0; tpg_cg->default_groups[i]; i++) {
1059 df_item = &tpg_cg->default_groups[i]->cg_item;
1060 tpg_cg->default_groups[i] = NULL;
1061 config_item_put(df_item);
1062 }
1063
1064 config_item_put(item);
1065}
1066
1067static void target_fabric_release_wwn(struct config_item *item)
1068{
1069 struct se_wwn *wwn = container_of(to_config_group(item),
1070 struct se_wwn, wwn_group);
1071 struct target_fabric_configfs *tf = wwn->wwn_tf;
1072
1073 tf->tf_ops.fabric_drop_wwn(wwn);
1074}
1075
1076static struct configfs_item_operations target_fabric_tpg_item_ops = {
1077 .release = target_fabric_release_wwn,
1078};
1079
1080static struct configfs_group_operations target_fabric_tpg_group_ops = {
1081 .make_group = target_fabric_make_tpg,
1082 .drop_item = target_fabric_drop_tpg,
1083};
1084
1085TF_CIT_SETUP(tpg, &target_fabric_tpg_item_ops, &target_fabric_tpg_group_ops,
1086 NULL);
1087
1088/* End of tfc_tpg_cit */
1089
1090/* Start of tfc_wwn_fabric_stats_cit */
1091/*
1092 * This is used as a placeholder for struct se_wwn->fabric_stat_group
1093 * to allow fabrics access to ->fabric_stat_group->default_groups[]
1094 */
1095TF_CIT_SETUP(wwn_fabric_stats, NULL, NULL, NULL);
1096
1097/* End of tfc_wwn_fabric_stats_cit */
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->wwn_tf = tf;
1119 /*
1120 * Setup default groups from pre-allocated wwn->wwn_default_groups
1121 */
1122 wwn->wwn_group.default_groups = wwn->wwn_default_groups;
1123 wwn->wwn_group.default_groups[0] = &wwn->fabric_stat_group;
1124 wwn->wwn_group.default_groups[1] = NULL;
1125
1126 config_group_init_type_name(&wwn->wwn_group, name,
1127 &TF_CIT_TMPL(tf)->tfc_tpg_cit);
1128 config_group_init_type_name(&wwn->fabric_stat_group, "fabric_statistics",
1129 &TF_CIT_TMPL(tf)->tfc_wwn_fabric_stats_cit);
1130
1131 return &wwn->wwn_group;
1132}
1133
1134static void target_fabric_drop_wwn(
1135 struct config_group *group,
1136 struct config_item *item)
1137{
1138 struct se_wwn *wwn = container_of(to_config_group(item),
1139 struct se_wwn, wwn_group);
1140 struct config_item *df_item;
1141 struct config_group *cg = &wwn->wwn_group;
1142 int i;
1143
1144 for (i = 0; cg->default_groups[i]; i++) {
1145 df_item = &cg->default_groups[i]->cg_item;
1146 cg->default_groups[i] = NULL;
1147 config_item_put(df_item);
1148 }
1149
1150 config_item_put(item);
1151}
1152
1153static struct configfs_group_operations target_fabric_wwn_group_ops = {
1154 .make_group = target_fabric_make_wwn,
1155 .drop_item = target_fabric_drop_wwn,
1156};
1157/*
1158 * For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
1159 */
1160CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
1161
1162static struct configfs_item_operations target_fabric_wwn_item_ops = {
1163 .show_attribute = target_fabric_wwn_attr_show,
1164 .store_attribute = target_fabric_wwn_attr_store,
1165};
1166
1167TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
1168
1169/* End of tfc_wwn_cit */
1170
1171/* Start of tfc_discovery_cit */
1172
1173CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
1174 tf_disc_group);
1175
1176static struct configfs_item_operations target_fabric_discovery_item_ops = {
1177 .show_attribute = target_fabric_discovery_attr_show,
1178 .store_attribute = target_fabric_discovery_attr_store,
1179};
1180
1181TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
1182
1183/* End of tfc_discovery_cit */
1184
1185int target_fabric_setup_cits(struct target_fabric_configfs *tf)
1186{
1187 target_fabric_setup_discovery_cit(tf);
1188 target_fabric_setup_wwn_cit(tf);
1189 target_fabric_setup_wwn_fabric_stats_cit(tf);
1190 target_fabric_setup_tpg_cit(tf);
1191 target_fabric_setup_tpg_base_cit(tf);
1192 target_fabric_setup_tpg_port_cit(tf);
1193 target_fabric_setup_tpg_port_stat_cit(tf);
1194 target_fabric_setup_tpg_lun_cit(tf);
1195 target_fabric_setup_tpg_np_cit(tf);
1196 target_fabric_setup_tpg_np_base_cit(tf);
1197 target_fabric_setup_tpg_attrib_cit(tf);
1198 target_fabric_setup_tpg_param_cit(tf);
1199 target_fabric_setup_tpg_nacl_cit(tf);
1200 target_fabric_setup_tpg_nacl_base_cit(tf);
1201 target_fabric_setup_tpg_nacl_attrib_cit(tf);
1202 target_fabric_setup_tpg_nacl_auth_cit(tf);
1203 target_fabric_setup_tpg_nacl_param_cit(tf);
1204 target_fabric_setup_tpg_nacl_stat_cit(tf);
1205 target_fabric_setup_tpg_mappedlun_cit(tf);
1206 target_fabric_setup_tpg_mappedlun_stat_cit(tf);
1207
1208 return 0;
1209}
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}