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}
1205