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1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/version.h>
27#include <generated/utsrelease.h>
28#include <linux/utsname.h>
29#include <linux/init.h>
30#include <linux/fs.h>
31#include <linux/namei.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34#include <linux/delay.h>
35#include <linux/unistd.h>
36#include <linux/string.h>
37#include <linux/parser.h>
38#include <linux/syscalls.h>
39#include <linux/configfs.h>
40#include <linux/spinlock.h>
41
42#include <target/target_core_base.h>
43#include <target/target_core_device.h>
44#include <target/target_core_transport.h>
45#include <target/target_core_fabric_ops.h>
46#include <target/target_core_fabric_configfs.h>
47#include <target/target_core_configfs.h>
48#include <target/configfs_macros.h>
49
50#include "target_core_alua.h"
51#include "target_core_hba.h"
52#include "target_core_pr.h"
53#include "target_core_rd.h"
54#include "target_core_stat.h"
55
56extern struct t10_alua_lu_gp *default_lu_gp;
57
58static struct list_head g_tf_list;
59static struct mutex g_tf_lock;
60
61struct target_core_configfs_attribute {
62 struct configfs_attribute attr;
63 ssize_t (*show)(void *, char *);
64 ssize_t (*store)(void *, const char *, size_t);
65};
66
67static struct config_group target_core_hbagroup;
68static struct config_group alua_group;
69static struct config_group alua_lu_gps_group;
70
71static DEFINE_SPINLOCK(se_device_lock);
72static LIST_HEAD(se_dev_list);
73
74static inline struct se_hba *
75item_to_hba(struct config_item *item)
76{
77 return container_of(to_config_group(item), struct se_hba, hba_group);
78}
79
80/*
81 * Attributes for /sys/kernel/config/target/
82 */
83static ssize_t target_core_attr_show(struct config_item *item,
84 struct configfs_attribute *attr,
85 char *page)
86{
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
89 utsname()->sysname, utsname()->machine);
90}
91
92static struct configfs_item_operations target_core_fabric_item_ops = {
93 .show_attribute = target_core_attr_show,
94};
95
96static struct configfs_attribute target_core_item_attr_version = {
97 .ca_owner = THIS_MODULE,
98 .ca_name = "version",
99 .ca_mode = S_IRUGO,
100};
101
102static struct target_fabric_configfs *target_core_get_fabric(
103 const char *name)
104{
105 struct target_fabric_configfs *tf;
106
107 if (!name)
108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
112 if (!strcmp(tf->tf_name, name)) {
113 atomic_inc(&tf->tf_access_cnt);
114 mutex_unlock(&g_tf_lock);
115 return tf;
116 }
117 }
118 mutex_unlock(&g_tf_lock);
119
120 return NULL;
121}
122
123/*
124 * Called from struct target_core_group_ops->make_group()
125 */
126static struct config_group *target_core_register_fabric(
127 struct config_group *group,
128 const char *name)
129{
130 struct target_fabric_configfs *tf;
131 int ret;
132
133 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
134 " %s\n", group, name);
135 /*
136 * Ensure that TCM subsystem plugins are loaded at this point for
137 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
138 * LUN symlinks.
139 */
140 if (transport_subsystem_check_init() < 0)
141 return ERR_PTR(-EINVAL);
142
143 /*
144 * Below are some hardcoded request_module() calls to automatically
145 * local fabric modules when the following is called:
146 *
147 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
148 *
149 * Note that this does not limit which TCM fabric module can be
150 * registered, but simply provids auto loading logic for modules with
151 * mkdir(2) system calls with known TCM fabric modules.
152 */
153 if (!strncmp(name, "iscsi", 5)) {
154 /*
155 * Automatically load the LIO Target fabric module when the
156 * following is called:
157 *
158 * mkdir -p $CONFIGFS/target/iscsi
159 */
160 ret = request_module("iscsi_target_mod");
161 if (ret < 0) {
162 pr_err("request_module() failed for"
163 " iscsi_target_mod.ko: %d\n", ret);
164 return ERR_PTR(-EINVAL);
165 }
166 } else if (!strncmp(name, "loopback", 8)) {
167 /*
168 * Automatically load the tcm_loop fabric module when the
169 * following is called:
170 *
171 * mkdir -p $CONFIGFS/target/loopback
172 */
173 ret = request_module("tcm_loop");
174 if (ret < 0) {
175 pr_err("request_module() failed for"
176 " tcm_loop.ko: %d\n", ret);
177 return ERR_PTR(-EINVAL);
178 }
179 }
180
181 tf = target_core_get_fabric(name);
182 if (!tf) {
183 pr_err("target_core_get_fabric() failed for %s\n",
184 name);
185 return ERR_PTR(-EINVAL);
186 }
187 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
188 " %s\n", tf->tf_name);
189 /*
190 * On a successful target_core_get_fabric() look, the returned
191 * struct target_fabric_configfs *tf will contain a usage reference.
192 */
193 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
194 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
195
196 tf->tf_group.default_groups = tf->tf_default_groups;
197 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
198 tf->tf_group.default_groups[1] = NULL;
199
200 config_group_init_type_name(&tf->tf_group, name,
201 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
203 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
204
205 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
206 " %s\n", tf->tf_group.cg_item.ci_name);
207 /*
208 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
209 */
210 tf->tf_ops.tf_subsys = tf->tf_subsys;
211 tf->tf_fabric = &tf->tf_group.cg_item;
212 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
213 " for %s\n", name);
214
215 return &tf->tf_group;
216}
217
218/*
219 * Called from struct target_core_group_ops->drop_item()
220 */
221static void target_core_deregister_fabric(
222 struct config_group *group,
223 struct config_item *item)
224{
225 struct target_fabric_configfs *tf = container_of(
226 to_config_group(item), struct target_fabric_configfs, tf_group);
227 struct config_group *tf_group;
228 struct config_item *df_item;
229 int i;
230
231 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
232 " tf list\n", config_item_name(item));
233
234 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
235 " %s\n", tf->tf_name);
236 atomic_dec(&tf->tf_access_cnt);
237
238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
239 " tf->tf_fabric for %s\n", tf->tf_name);
240 tf->tf_fabric = NULL;
241
242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
243 " %s\n", config_item_name(item));
244
245 tf_group = &tf->tf_group;
246 for (i = 0; tf_group->default_groups[i]; i++) {
247 df_item = &tf_group->default_groups[i]->cg_item;
248 tf_group->default_groups[i] = NULL;
249 config_item_put(df_item);
250 }
251 config_item_put(item);
252}
253
254static struct configfs_group_operations target_core_fabric_group_ops = {
255 .make_group = &target_core_register_fabric,
256 .drop_item = &target_core_deregister_fabric,
257};
258
259/*
260 * All item attributes appearing in /sys/kernel/target/ appear here.
261 */
262static struct configfs_attribute *target_core_fabric_item_attrs[] = {
263 &target_core_item_attr_version,
264 NULL,
265};
266
267/*
268 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
269 */
270static struct config_item_type target_core_fabrics_item = {
271 .ct_item_ops = &target_core_fabric_item_ops,
272 .ct_group_ops = &target_core_fabric_group_ops,
273 .ct_attrs = target_core_fabric_item_attrs,
274 .ct_owner = THIS_MODULE,
275};
276
277static struct configfs_subsystem target_core_fabrics = {
278 .su_group = {
279 .cg_item = {
280 .ci_namebuf = "target",
281 .ci_type = &target_core_fabrics_item,
282 },
283 },
284};
285
286static struct configfs_subsystem *target_core_subsystem[] = {
287 &target_core_fabrics,
288 NULL,
289};
290
291/*##############################################################################
292// Start functions called by external Target Fabrics Modules
293//############################################################################*/
294
295/*
296 * First function called by fabric modules to:
297 *
298 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
299 * 2) Add struct target_fabric_configfs to g_tf_list
300 * 3) Return struct target_fabric_configfs to fabric module to be passed
301 * into target_fabric_configfs_register().
302 */
303struct target_fabric_configfs *target_fabric_configfs_init(
304 struct module *fabric_mod,
305 const char *name)
306{
307 struct target_fabric_configfs *tf;
308
309 if (!(name)) {
310 pr_err("Unable to locate passed fabric name\n");
311 return ERR_PTR(-EINVAL);
312 }
313 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
315 "_NAME_SIZE\n", name);
316 return ERR_PTR(-EINVAL);
317 }
318
319 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
320 if (!tf)
321 return ERR_PTR(-ENOMEM);
322
323 INIT_LIST_HEAD(&tf->tf_list);
324 atomic_set(&tf->tf_access_cnt, 0);
325 /*
326 * Setup the default generic struct config_item_type's (cits) in
327 * struct target_fabric_configfs->tf_cit_tmpl
328 */
329 tf->tf_module = fabric_mod;
330 target_fabric_setup_cits(tf);
331
332 tf->tf_subsys = target_core_subsystem[0];
333 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
334
335 mutex_lock(&g_tf_lock);
336 list_add_tail(&tf->tf_list, &g_tf_list);
337 mutex_unlock(&g_tf_lock);
338
339 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
340 ">>>>>>>>>>>>>>\n");
341 pr_debug("Initialized struct target_fabric_configfs: %p for"
342 " %s\n", tf, tf->tf_name);
343 return tf;
344}
345EXPORT_SYMBOL(target_fabric_configfs_init);
346
347/*
348 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
349 */
350void target_fabric_configfs_free(
351 struct target_fabric_configfs *tf)
352{
353 mutex_lock(&g_tf_lock);
354 list_del(&tf->tf_list);
355 mutex_unlock(&g_tf_lock);
356
357 kfree(tf);
358}
359EXPORT_SYMBOL(target_fabric_configfs_free);
360
361/*
362 * Perform a sanity check of the passed tf->tf_ops before completing
363 * TCM fabric module registration.
364 */
365static int target_fabric_tf_ops_check(
366 struct target_fabric_configfs *tf)
367{
368 struct target_core_fabric_ops *tfo = &tf->tf_ops;
369
370 if (!tfo->get_fabric_name) {
371 pr_err("Missing tfo->get_fabric_name()\n");
372 return -EINVAL;
373 }
374 if (!tfo->get_fabric_proto_ident) {
375 pr_err("Missing tfo->get_fabric_proto_ident()\n");
376 return -EINVAL;
377 }
378 if (!tfo->tpg_get_wwn) {
379 pr_err("Missing tfo->tpg_get_wwn()\n");
380 return -EINVAL;
381 }
382 if (!tfo->tpg_get_tag) {
383 pr_err("Missing tfo->tpg_get_tag()\n");
384 return -EINVAL;
385 }
386 if (!tfo->tpg_get_default_depth) {
387 pr_err("Missing tfo->tpg_get_default_depth()\n");
388 return -EINVAL;
389 }
390 if (!tfo->tpg_get_pr_transport_id) {
391 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
392 return -EINVAL;
393 }
394 if (!tfo->tpg_get_pr_transport_id_len) {
395 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
396 return -EINVAL;
397 }
398 if (!tfo->tpg_check_demo_mode) {
399 pr_err("Missing tfo->tpg_check_demo_mode()\n");
400 return -EINVAL;
401 }
402 if (!tfo->tpg_check_demo_mode_cache) {
403 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
404 return -EINVAL;
405 }
406 if (!tfo->tpg_check_demo_mode_write_protect) {
407 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
408 return -EINVAL;
409 }
410 if (!tfo->tpg_check_prod_mode_write_protect) {
411 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
412 return -EINVAL;
413 }
414 if (!tfo->tpg_alloc_fabric_acl) {
415 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
416 return -EINVAL;
417 }
418 if (!tfo->tpg_release_fabric_acl) {
419 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
420 return -EINVAL;
421 }
422 if (!tfo->tpg_get_inst_index) {
423 pr_err("Missing tfo->tpg_get_inst_index()\n");
424 return -EINVAL;
425 }
426 if (!tfo->release_cmd) {
427 pr_err("Missing tfo->release_cmd()\n");
428 return -EINVAL;
429 }
430 if (!tfo->shutdown_session) {
431 pr_err("Missing tfo->shutdown_session()\n");
432 return -EINVAL;
433 }
434 if (!tfo->close_session) {
435 pr_err("Missing tfo->close_session()\n");
436 return -EINVAL;
437 }
438 if (!tfo->stop_session) {
439 pr_err("Missing tfo->stop_session()\n");
440 return -EINVAL;
441 }
442 if (!tfo->fall_back_to_erl0) {
443 pr_err("Missing tfo->fall_back_to_erl0()\n");
444 return -EINVAL;
445 }
446 if (!tfo->sess_logged_in) {
447 pr_err("Missing tfo->sess_logged_in()\n");
448 return -EINVAL;
449 }
450 if (!tfo->sess_get_index) {
451 pr_err("Missing tfo->sess_get_index()\n");
452 return -EINVAL;
453 }
454 if (!tfo->write_pending) {
455 pr_err("Missing tfo->write_pending()\n");
456 return -EINVAL;
457 }
458 if (!tfo->write_pending_status) {
459 pr_err("Missing tfo->write_pending_status()\n");
460 return -EINVAL;
461 }
462 if (!tfo->set_default_node_attributes) {
463 pr_err("Missing tfo->set_default_node_attributes()\n");
464 return -EINVAL;
465 }
466 if (!tfo->get_task_tag) {
467 pr_err("Missing tfo->get_task_tag()\n");
468 return -EINVAL;
469 }
470 if (!tfo->get_cmd_state) {
471 pr_err("Missing tfo->get_cmd_state()\n");
472 return -EINVAL;
473 }
474 if (!tfo->queue_data_in) {
475 pr_err("Missing tfo->queue_data_in()\n");
476 return -EINVAL;
477 }
478 if (!tfo->queue_status) {
479 pr_err("Missing tfo->queue_status()\n");
480 return -EINVAL;
481 }
482 if (!tfo->queue_tm_rsp) {
483 pr_err("Missing tfo->queue_tm_rsp()\n");
484 return -EINVAL;
485 }
486 if (!tfo->set_fabric_sense_len) {
487 pr_err("Missing tfo->set_fabric_sense_len()\n");
488 return -EINVAL;
489 }
490 if (!tfo->get_fabric_sense_len) {
491 pr_err("Missing tfo->get_fabric_sense_len()\n");
492 return -EINVAL;
493 }
494 if (!tfo->is_state_remove) {
495 pr_err("Missing tfo->is_state_remove()\n");
496 return -EINVAL;
497 }
498 /*
499 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
500 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
501 * target_core_fabric_configfs.c WWN+TPG group context code.
502 */
503 if (!tfo->fabric_make_wwn) {
504 pr_err("Missing tfo->fabric_make_wwn()\n");
505 return -EINVAL;
506 }
507 if (!tfo->fabric_drop_wwn) {
508 pr_err("Missing tfo->fabric_drop_wwn()\n");
509 return -EINVAL;
510 }
511 if (!tfo->fabric_make_tpg) {
512 pr_err("Missing tfo->fabric_make_tpg()\n");
513 return -EINVAL;
514 }
515 if (!tfo->fabric_drop_tpg) {
516 pr_err("Missing tfo->fabric_drop_tpg()\n");
517 return -EINVAL;
518 }
519
520 return 0;
521}
522
523/*
524 * Called 2nd from fabric module with returned parameter of
525 * struct target_fabric_configfs * from target_fabric_configfs_init().
526 *
527 * Upon a successful registration, the new fabric's struct config_item is
528 * return. Also, a pointer to this struct is set in the passed
529 * struct target_fabric_configfs.
530 */
531int target_fabric_configfs_register(
532 struct target_fabric_configfs *tf)
533{
534 int ret;
535
536 if (!tf) {
537 pr_err("Unable to locate target_fabric_configfs"
538 " pointer\n");
539 return -EINVAL;
540 }
541 if (!tf->tf_subsys) {
542 pr_err("Unable to target struct config_subsystem"
543 " pointer\n");
544 return -EINVAL;
545 }
546 ret = target_fabric_tf_ops_check(tf);
547 if (ret < 0)
548 return ret;
549
550 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
551 ">>>>>>>>>>\n");
552 return 0;
553}
554EXPORT_SYMBOL(target_fabric_configfs_register);
555
556void target_fabric_configfs_deregister(
557 struct target_fabric_configfs *tf)
558{
559 struct configfs_subsystem *su;
560
561 if (!tf) {
562 pr_err("Unable to locate passed target_fabric_"
563 "configfs\n");
564 return;
565 }
566 su = tf->tf_subsys;
567 if (!su) {
568 pr_err("Unable to locate passed tf->tf_subsys"
569 " pointer\n");
570 return;
571 }
572 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
573 ">>>>>>>>>>>>\n");
574 mutex_lock(&g_tf_lock);
575 if (atomic_read(&tf->tf_access_cnt)) {
576 mutex_unlock(&g_tf_lock);
577 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
578 tf->tf_name);
579 BUG();
580 }
581 list_del(&tf->tf_list);
582 mutex_unlock(&g_tf_lock);
583
584 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
585 " %s\n", tf->tf_name);
586 tf->tf_module = NULL;
587 tf->tf_subsys = NULL;
588 kfree(tf);
589
590 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
591 ">>>>>\n");
592}
593EXPORT_SYMBOL(target_fabric_configfs_deregister);
594
595/*##############################################################################
596// Stop functions called by external Target Fabrics Modules
597//############################################################################*/
598
599/* Start functions for struct config_item_type target_core_dev_attrib_cit */
600
601#define DEF_DEV_ATTRIB_SHOW(_name) \
602static ssize_t target_core_dev_show_attr_##_name( \
603 struct se_dev_attrib *da, \
604 char *page) \
605{ \
606 struct se_device *dev; \
607 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
608 ssize_t rb; \
609 \
610 spin_lock(&se_dev->se_dev_lock); \
611 dev = se_dev->se_dev_ptr; \
612 if (!dev) { \
613 spin_unlock(&se_dev->se_dev_lock); \
614 return -ENODEV; \
615 } \
616 rb = snprintf(page, PAGE_SIZE, "%u\n", \
617 (u32)dev->se_sub_dev->se_dev_attrib._name); \
618 spin_unlock(&se_dev->se_dev_lock); \
619 \
620 return rb; \
621}
622
623#define DEF_DEV_ATTRIB_STORE(_name) \
624static ssize_t target_core_dev_store_attr_##_name( \
625 struct se_dev_attrib *da, \
626 const char *page, \
627 size_t count) \
628{ \
629 struct se_device *dev; \
630 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
631 unsigned long val; \
632 int ret; \
633 \
634 spin_lock(&se_dev->se_dev_lock); \
635 dev = se_dev->se_dev_ptr; \
636 if (!dev) { \
637 spin_unlock(&se_dev->se_dev_lock); \
638 return -ENODEV; \
639 } \
640 ret = strict_strtoul(page, 0, &val); \
641 if (ret < 0) { \
642 spin_unlock(&se_dev->se_dev_lock); \
643 pr_err("strict_strtoul() failed with" \
644 " ret: %d\n", ret); \
645 return -EINVAL; \
646 } \
647 ret = se_dev_set_##_name(dev, (u32)val); \
648 spin_unlock(&se_dev->se_dev_lock); \
649 \
650 return (!ret) ? count : -EINVAL; \
651}
652
653#define DEF_DEV_ATTRIB(_name) \
654DEF_DEV_ATTRIB_SHOW(_name); \
655DEF_DEV_ATTRIB_STORE(_name);
656
657#define DEF_DEV_ATTRIB_RO(_name) \
658DEF_DEV_ATTRIB_SHOW(_name);
659
660CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
661#define SE_DEV_ATTR(_name, _mode) \
662static struct target_core_dev_attrib_attribute \
663 target_core_dev_attrib_##_name = \
664 __CONFIGFS_EATTR(_name, _mode, \
665 target_core_dev_show_attr_##_name, \
666 target_core_dev_store_attr_##_name);
667
668#define SE_DEV_ATTR_RO(_name); \
669static struct target_core_dev_attrib_attribute \
670 target_core_dev_attrib_##_name = \
671 __CONFIGFS_EATTR_RO(_name, \
672 target_core_dev_show_attr_##_name);
673
674DEF_DEV_ATTRIB(emulate_dpo);
675SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
676
677DEF_DEV_ATTRIB(emulate_fua_write);
678SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
679
680DEF_DEV_ATTRIB(emulate_fua_read);
681SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
682
683DEF_DEV_ATTRIB(emulate_write_cache);
684SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
685
686DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
687SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(emulate_tas);
690SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(emulate_tpu);
693SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(emulate_tpws);
696SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(enforce_pr_isids);
699SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(is_nonrot);
702SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
703
704DEF_DEV_ATTRIB(emulate_rest_reord);
705SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
706
707DEF_DEV_ATTRIB_RO(hw_block_size);
708SE_DEV_ATTR_RO(hw_block_size);
709
710DEF_DEV_ATTRIB(block_size);
711SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
712
713DEF_DEV_ATTRIB_RO(hw_max_sectors);
714SE_DEV_ATTR_RO(hw_max_sectors);
715
716DEF_DEV_ATTRIB(max_sectors);
717SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
718
719DEF_DEV_ATTRIB(optimal_sectors);
720SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
721
722DEF_DEV_ATTRIB_RO(hw_queue_depth);
723SE_DEV_ATTR_RO(hw_queue_depth);
724
725DEF_DEV_ATTRIB(queue_depth);
726SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
727
728DEF_DEV_ATTRIB(task_timeout);
729SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
730
731DEF_DEV_ATTRIB(max_unmap_lba_count);
732SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
733
734DEF_DEV_ATTRIB(max_unmap_block_desc_count);
735SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
736
737DEF_DEV_ATTRIB(unmap_granularity);
738SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
739
740DEF_DEV_ATTRIB(unmap_granularity_alignment);
741SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
742
743CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
744
745static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
746 &target_core_dev_attrib_emulate_dpo.attr,
747 &target_core_dev_attrib_emulate_fua_write.attr,
748 &target_core_dev_attrib_emulate_fua_read.attr,
749 &target_core_dev_attrib_emulate_write_cache.attr,
750 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
751 &target_core_dev_attrib_emulate_tas.attr,
752 &target_core_dev_attrib_emulate_tpu.attr,
753 &target_core_dev_attrib_emulate_tpws.attr,
754 &target_core_dev_attrib_enforce_pr_isids.attr,
755 &target_core_dev_attrib_is_nonrot.attr,
756 &target_core_dev_attrib_emulate_rest_reord.attr,
757 &target_core_dev_attrib_hw_block_size.attr,
758 &target_core_dev_attrib_block_size.attr,
759 &target_core_dev_attrib_hw_max_sectors.attr,
760 &target_core_dev_attrib_max_sectors.attr,
761 &target_core_dev_attrib_optimal_sectors.attr,
762 &target_core_dev_attrib_hw_queue_depth.attr,
763 &target_core_dev_attrib_queue_depth.attr,
764 &target_core_dev_attrib_task_timeout.attr,
765 &target_core_dev_attrib_max_unmap_lba_count.attr,
766 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
767 &target_core_dev_attrib_unmap_granularity.attr,
768 &target_core_dev_attrib_unmap_granularity_alignment.attr,
769 NULL,
770};
771
772static struct configfs_item_operations target_core_dev_attrib_ops = {
773 .show_attribute = target_core_dev_attrib_attr_show,
774 .store_attribute = target_core_dev_attrib_attr_store,
775};
776
777static struct config_item_type target_core_dev_attrib_cit = {
778 .ct_item_ops = &target_core_dev_attrib_ops,
779 .ct_attrs = target_core_dev_attrib_attrs,
780 .ct_owner = THIS_MODULE,
781};
782
783/* End functions for struct config_item_type target_core_dev_attrib_cit */
784
785/* Start functions for struct config_item_type target_core_dev_wwn_cit */
786
787CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
788#define SE_DEV_WWN_ATTR(_name, _mode) \
789static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
790 __CONFIGFS_EATTR(_name, _mode, \
791 target_core_dev_wwn_show_attr_##_name, \
792 target_core_dev_wwn_store_attr_##_name);
793
794#define SE_DEV_WWN_ATTR_RO(_name); \
795do { \
796 static struct target_core_dev_wwn_attribute \
797 target_core_dev_wwn_##_name = \
798 __CONFIGFS_EATTR_RO(_name, \
799 target_core_dev_wwn_show_attr_##_name); \
800} while (0);
801
802/*
803 * VPD page 0x80 Unit serial
804 */
805static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
806 struct t10_wwn *t10_wwn,
807 char *page)
808{
809 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
810 struct se_device *dev;
811
812 dev = se_dev->se_dev_ptr;
813 if (!dev)
814 return -ENODEV;
815
816 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
817 &t10_wwn->unit_serial[0]);
818}
819
820static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
821 struct t10_wwn *t10_wwn,
822 const char *page,
823 size_t count)
824{
825 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
826 struct se_device *dev;
827 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
828
829 /*
830 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
831 * from the struct scsi_device level firmware, do not allow
832 * VPD Unit Serial to be emulated.
833 *
834 * Note this struct scsi_device could also be emulating VPD
835 * information from its drivers/scsi LLD. But for now we assume
836 * it is doing 'the right thing' wrt a world wide unique
837 * VPD Unit Serial Number that OS dependent multipath can depend on.
838 */
839 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
840 pr_err("Underlying SCSI device firmware provided VPD"
841 " Unit Serial, ignoring request\n");
842 return -EOPNOTSUPP;
843 }
844
845 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
846 pr_err("Emulated VPD Unit Serial exceeds"
847 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
848 return -EOVERFLOW;
849 }
850 /*
851 * Check to see if any active $FABRIC_MOD exports exist. If they
852 * do exist, fail here as changing this information on the fly
853 * (underneath the initiator side OS dependent multipath code)
854 * could cause negative effects.
855 */
856 dev = su_dev->se_dev_ptr;
857 if (dev) {
858 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
859 pr_err("Unable to set VPD Unit Serial while"
860 " active %d $FABRIC_MOD exports exist\n",
861 atomic_read(&dev->dev_export_obj.obj_access_count));
862 return -EINVAL;
863 }
864 }
865 /*
866 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
867 *
868 * Also, strip any newline added from the userspace
869 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
870 */
871 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
872 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
873 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
874 "%s", strstrip(buf));
875 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
876
877 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
878 " %s\n", su_dev->t10_wwn.unit_serial);
879
880 return count;
881}
882
883SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
884
885/*
886 * VPD page 0x83 Protocol Identifier
887 */
888static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
889 struct t10_wwn *t10_wwn,
890 char *page)
891{
892 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
893 struct se_device *dev;
894 struct t10_vpd *vpd;
895 unsigned char buf[VPD_TMP_BUF_SIZE];
896 ssize_t len = 0;
897
898 dev = se_dev->se_dev_ptr;
899 if (!dev)
900 return -ENODEV;
901
902 memset(buf, 0, VPD_TMP_BUF_SIZE);
903
904 spin_lock(&t10_wwn->t10_vpd_lock);
905 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
906 if (!vpd->protocol_identifier_set)
907 continue;
908
909 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
910
911 if (len + strlen(buf) >= PAGE_SIZE)
912 break;
913
914 len += sprintf(page+len, "%s", buf);
915 }
916 spin_unlock(&t10_wwn->t10_vpd_lock);
917
918 return len;
919}
920
921static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
922 struct t10_wwn *t10_wwn,
923 const char *page,
924 size_t count)
925{
926 return -ENOSYS;
927}
928
929SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
930
931/*
932 * Generic wrapper for dumping VPD identifiers by association.
933 */
934#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
935static ssize_t target_core_dev_wwn_show_attr_##_name( \
936 struct t10_wwn *t10_wwn, \
937 char *page) \
938{ \
939 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
940 struct se_device *dev; \
941 struct t10_vpd *vpd; \
942 unsigned char buf[VPD_TMP_BUF_SIZE]; \
943 ssize_t len = 0; \
944 \
945 dev = se_dev->se_dev_ptr; \
946 if (!dev) \
947 return -ENODEV; \
948 \
949 spin_lock(&t10_wwn->t10_vpd_lock); \
950 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
951 if (vpd->association != _assoc) \
952 continue; \
953 \
954 memset(buf, 0, VPD_TMP_BUF_SIZE); \
955 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
956 if (len + strlen(buf) >= PAGE_SIZE) \
957 break; \
958 len += sprintf(page+len, "%s", buf); \
959 \
960 memset(buf, 0, VPD_TMP_BUF_SIZE); \
961 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
962 if (len + strlen(buf) >= PAGE_SIZE) \
963 break; \
964 len += sprintf(page+len, "%s", buf); \
965 \
966 memset(buf, 0, VPD_TMP_BUF_SIZE); \
967 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
968 if (len + strlen(buf) >= PAGE_SIZE) \
969 break; \
970 len += sprintf(page+len, "%s", buf); \
971 } \
972 spin_unlock(&t10_wwn->t10_vpd_lock); \
973 \
974 return len; \
975}
976
977/*
978 * VPD page 0x83 Association: Logical Unit
979 */
980DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
981
982static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
983 struct t10_wwn *t10_wwn,
984 const char *page,
985 size_t count)
986{
987 return -ENOSYS;
988}
989
990SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
991
992/*
993 * VPD page 0x83 Association: Target Port
994 */
995DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
996
997static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
998 struct t10_wwn *t10_wwn,
999 const char *page,
1000 size_t count)
1001{
1002 return -ENOSYS;
1003}
1004
1005SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1006
1007/*
1008 * VPD page 0x83 Association: SCSI Target Device
1009 */
1010DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1011
1012static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1013 struct t10_wwn *t10_wwn,
1014 const char *page,
1015 size_t count)
1016{
1017 return -ENOSYS;
1018}
1019
1020SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1021
1022CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1023
1024static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1025 &target_core_dev_wwn_vpd_unit_serial.attr,
1026 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1027 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1028 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1029 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1030 NULL,
1031};
1032
1033static struct configfs_item_operations target_core_dev_wwn_ops = {
1034 .show_attribute = target_core_dev_wwn_attr_show,
1035 .store_attribute = target_core_dev_wwn_attr_store,
1036};
1037
1038static struct config_item_type target_core_dev_wwn_cit = {
1039 .ct_item_ops = &target_core_dev_wwn_ops,
1040 .ct_attrs = target_core_dev_wwn_attrs,
1041 .ct_owner = THIS_MODULE,
1042};
1043
1044/* End functions for struct config_item_type target_core_dev_wwn_cit */
1045
1046/* Start functions for struct config_item_type target_core_dev_pr_cit */
1047
1048CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1049#define SE_DEV_PR_ATTR(_name, _mode) \
1050static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1051 __CONFIGFS_EATTR(_name, _mode, \
1052 target_core_dev_pr_show_attr_##_name, \
1053 target_core_dev_pr_store_attr_##_name);
1054
1055#define SE_DEV_PR_ATTR_RO(_name); \
1056static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1057 __CONFIGFS_EATTR_RO(_name, \
1058 target_core_dev_pr_show_attr_##_name);
1059
1060/*
1061 * res_holder
1062 */
1063static ssize_t target_core_dev_pr_show_spc3_res(
1064 struct se_device *dev,
1065 char *page,
1066 ssize_t *len)
1067{
1068 struct se_node_acl *se_nacl;
1069 struct t10_pr_registration *pr_reg;
1070 char i_buf[PR_REG_ISID_ID_LEN];
1071 int prf_isid;
1072
1073 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1074
1075 spin_lock(&dev->dev_reservation_lock);
1076 pr_reg = dev->dev_pr_res_holder;
1077 if (!pr_reg) {
1078 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1079 spin_unlock(&dev->dev_reservation_lock);
1080 return *len;
1081 }
1082 se_nacl = pr_reg->pr_reg_nacl;
1083 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1084 PR_REG_ISID_ID_LEN);
1085
1086 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1087 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1088 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1089 spin_unlock(&dev->dev_reservation_lock);
1090
1091 return *len;
1092}
1093
1094static ssize_t target_core_dev_pr_show_spc2_res(
1095 struct se_device *dev,
1096 char *page,
1097 ssize_t *len)
1098{
1099 struct se_node_acl *se_nacl;
1100
1101 spin_lock(&dev->dev_reservation_lock);
1102 se_nacl = dev->dev_reserved_node_acl;
1103 if (!se_nacl) {
1104 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1105 spin_unlock(&dev->dev_reservation_lock);
1106 return *len;
1107 }
1108 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1109 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1110 se_nacl->initiatorname);
1111 spin_unlock(&dev->dev_reservation_lock);
1112
1113 return *len;
1114}
1115
1116static ssize_t target_core_dev_pr_show_attr_res_holder(
1117 struct se_subsystem_dev *su_dev,
1118 char *page)
1119{
1120 ssize_t len = 0;
1121
1122 if (!su_dev->se_dev_ptr)
1123 return -ENODEV;
1124
1125 switch (su_dev->t10_pr.res_type) {
1126 case SPC3_PERSISTENT_RESERVATIONS:
1127 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1128 page, &len);
1129 break;
1130 case SPC2_RESERVATIONS:
1131 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1132 page, &len);
1133 break;
1134 case SPC_PASSTHROUGH:
1135 len += sprintf(page+len, "Passthrough\n");
1136 break;
1137 default:
1138 len += sprintf(page+len, "Unknown\n");
1139 break;
1140 }
1141
1142 return len;
1143}
1144
1145SE_DEV_PR_ATTR_RO(res_holder);
1146
1147/*
1148 * res_pr_all_tgt_pts
1149 */
1150static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1151 struct se_subsystem_dev *su_dev,
1152 char *page)
1153{
1154 struct se_device *dev;
1155 struct t10_pr_registration *pr_reg;
1156 ssize_t len = 0;
1157
1158 dev = su_dev->se_dev_ptr;
1159 if (!dev)
1160 return -ENODEV;
1161
1162 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1163 return len;
1164
1165 spin_lock(&dev->dev_reservation_lock);
1166 pr_reg = dev->dev_pr_res_holder;
1167 if (!pr_reg) {
1168 len = sprintf(page, "No SPC-3 Reservation holder\n");
1169 spin_unlock(&dev->dev_reservation_lock);
1170 return len;
1171 }
1172 /*
1173 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1174 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1175 */
1176 if (pr_reg->pr_reg_all_tg_pt)
1177 len = sprintf(page, "SPC-3 Reservation: All Target"
1178 " Ports registration\n");
1179 else
1180 len = sprintf(page, "SPC-3 Reservation: Single"
1181 " Target Port registration\n");
1182 spin_unlock(&dev->dev_reservation_lock);
1183
1184 return len;
1185}
1186
1187SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1188
1189/*
1190 * res_pr_generation
1191 */
1192static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1193 struct se_subsystem_dev *su_dev,
1194 char *page)
1195{
1196 if (!su_dev->se_dev_ptr)
1197 return -ENODEV;
1198
1199 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1200 return 0;
1201
1202 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1203}
1204
1205SE_DEV_PR_ATTR_RO(res_pr_generation);
1206
1207/*
1208 * res_pr_holder_tg_port
1209 */
1210static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1211 struct se_subsystem_dev *su_dev,
1212 char *page)
1213{
1214 struct se_device *dev;
1215 struct se_node_acl *se_nacl;
1216 struct se_lun *lun;
1217 struct se_portal_group *se_tpg;
1218 struct t10_pr_registration *pr_reg;
1219 struct target_core_fabric_ops *tfo;
1220 ssize_t len = 0;
1221
1222 dev = su_dev->se_dev_ptr;
1223 if (!dev)
1224 return -ENODEV;
1225
1226 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1227 return len;
1228
1229 spin_lock(&dev->dev_reservation_lock);
1230 pr_reg = dev->dev_pr_res_holder;
1231 if (!pr_reg) {
1232 len = sprintf(page, "No SPC-3 Reservation holder\n");
1233 spin_unlock(&dev->dev_reservation_lock);
1234 return len;
1235 }
1236 se_nacl = pr_reg->pr_reg_nacl;
1237 se_tpg = se_nacl->se_tpg;
1238 lun = pr_reg->pr_reg_tg_pt_lun;
1239 tfo = se_tpg->se_tpg_tfo;
1240
1241 len += sprintf(page+len, "SPC-3 Reservation: %s"
1242 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1243 tfo->tpg_get_wwn(se_tpg));
1244 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1245 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1246 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1247 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1248 tfo->get_fabric_name(), lun->unpacked_lun);
1249 spin_unlock(&dev->dev_reservation_lock);
1250
1251 return len;
1252}
1253
1254SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1255
1256/*
1257 * res_pr_registered_i_pts
1258 */
1259static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1260 struct se_subsystem_dev *su_dev,
1261 char *page)
1262{
1263 struct target_core_fabric_ops *tfo;
1264 struct t10_pr_registration *pr_reg;
1265 unsigned char buf[384];
1266 char i_buf[PR_REG_ISID_ID_LEN];
1267 ssize_t len = 0;
1268 int reg_count = 0, prf_isid;
1269
1270 if (!su_dev->se_dev_ptr)
1271 return -ENODEV;
1272
1273 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1274 return len;
1275
1276 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1277
1278 spin_lock(&su_dev->t10_pr.registration_lock);
1279 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1280 pr_reg_list) {
1281
1282 memset(buf, 0, 384);
1283 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1284 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1285 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1286 PR_REG_ISID_ID_LEN);
1287 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1288 tfo->get_fabric_name(),
1289 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1290 &i_buf[0] : "", pr_reg->pr_res_key,
1291 pr_reg->pr_res_generation);
1292
1293 if (len + strlen(buf) >= PAGE_SIZE)
1294 break;
1295
1296 len += sprintf(page+len, "%s", buf);
1297 reg_count++;
1298 }
1299 spin_unlock(&su_dev->t10_pr.registration_lock);
1300
1301 if (!reg_count)
1302 len += sprintf(page+len, "None\n");
1303
1304 return len;
1305}
1306
1307SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1308
1309/*
1310 * res_pr_type
1311 */
1312static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1313 struct se_subsystem_dev *su_dev,
1314 char *page)
1315{
1316 struct se_device *dev;
1317 struct t10_pr_registration *pr_reg;
1318 ssize_t len = 0;
1319
1320 dev = su_dev->se_dev_ptr;
1321 if (!dev)
1322 return -ENODEV;
1323
1324 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1325 return len;
1326
1327 spin_lock(&dev->dev_reservation_lock);
1328 pr_reg = dev->dev_pr_res_holder;
1329 if (!pr_reg) {
1330 len = sprintf(page, "No SPC-3 Reservation holder\n");
1331 spin_unlock(&dev->dev_reservation_lock);
1332 return len;
1333 }
1334 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1335 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1336 spin_unlock(&dev->dev_reservation_lock);
1337
1338 return len;
1339}
1340
1341SE_DEV_PR_ATTR_RO(res_pr_type);
1342
1343/*
1344 * res_type
1345 */
1346static ssize_t target_core_dev_pr_show_attr_res_type(
1347 struct se_subsystem_dev *su_dev,
1348 char *page)
1349{
1350 ssize_t len = 0;
1351
1352 if (!su_dev->se_dev_ptr)
1353 return -ENODEV;
1354
1355 switch (su_dev->t10_pr.res_type) {
1356 case SPC3_PERSISTENT_RESERVATIONS:
1357 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1358 break;
1359 case SPC2_RESERVATIONS:
1360 len = sprintf(page, "SPC2_RESERVATIONS\n");
1361 break;
1362 case SPC_PASSTHROUGH:
1363 len = sprintf(page, "SPC_PASSTHROUGH\n");
1364 break;
1365 default:
1366 len = sprintf(page, "UNKNOWN\n");
1367 break;
1368 }
1369
1370 return len;
1371}
1372
1373SE_DEV_PR_ATTR_RO(res_type);
1374
1375/*
1376 * res_aptpl_active
1377 */
1378
1379static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1380 struct se_subsystem_dev *su_dev,
1381 char *page)
1382{
1383 if (!su_dev->se_dev_ptr)
1384 return -ENODEV;
1385
1386 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1387 return 0;
1388
1389 return sprintf(page, "APTPL Bit Status: %s\n",
1390 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1391}
1392
1393SE_DEV_PR_ATTR_RO(res_aptpl_active);
1394
1395/*
1396 * res_aptpl_metadata
1397 */
1398static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1399 struct se_subsystem_dev *su_dev,
1400 char *page)
1401{
1402 if (!su_dev->se_dev_ptr)
1403 return -ENODEV;
1404
1405 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1406 return 0;
1407
1408 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1409}
1410
1411enum {
1412 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1413 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1414 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1415 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1416};
1417
1418static match_table_t tokens = {
1419 {Opt_initiator_fabric, "initiator_fabric=%s"},
1420 {Opt_initiator_node, "initiator_node=%s"},
1421 {Opt_initiator_sid, "initiator_sid=%s"},
1422 {Opt_sa_res_key, "sa_res_key=%s"},
1423 {Opt_res_holder, "res_holder=%d"},
1424 {Opt_res_type, "res_type=%d"},
1425 {Opt_res_scope, "res_scope=%d"},
1426 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1427 {Opt_mapped_lun, "mapped_lun=%d"},
1428 {Opt_target_fabric, "target_fabric=%s"},
1429 {Opt_target_node, "target_node=%s"},
1430 {Opt_tpgt, "tpgt=%d"},
1431 {Opt_port_rtpi, "port_rtpi=%d"},
1432 {Opt_target_lun, "target_lun=%d"},
1433 {Opt_err, NULL}
1434};
1435
1436static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1437 struct se_subsystem_dev *su_dev,
1438 const char *page,
1439 size_t count)
1440{
1441 struct se_device *dev;
1442 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1443 unsigned char *t_fabric = NULL, *t_port = NULL;
1444 char *orig, *ptr, *arg_p, *opts;
1445 substring_t args[MAX_OPT_ARGS];
1446 unsigned long long tmp_ll;
1447 u64 sa_res_key = 0;
1448 u32 mapped_lun = 0, target_lun = 0;
1449 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1450 u16 port_rpti = 0, tpgt = 0;
1451 u8 type = 0, scope;
1452
1453 dev = su_dev->se_dev_ptr;
1454 if (!dev)
1455 return -ENODEV;
1456
1457 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1458 return 0;
1459
1460 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1461 pr_debug("Unable to process APTPL metadata while"
1462 " active fabric exports exist\n");
1463 return -EINVAL;
1464 }
1465
1466 opts = kstrdup(page, GFP_KERNEL);
1467 if (!opts)
1468 return -ENOMEM;
1469
1470 orig = opts;
1471 while ((ptr = strsep(&opts, ",")) != NULL) {
1472 if (!*ptr)
1473 continue;
1474
1475 token = match_token(ptr, tokens, args);
1476 switch (token) {
1477 case Opt_initiator_fabric:
1478 i_fabric = match_strdup(&args[0]);
1479 if (!i_fabric) {
1480 ret = -ENOMEM;
1481 goto out;
1482 }
1483 break;
1484 case Opt_initiator_node:
1485 i_port = match_strdup(&args[0]);
1486 if (!i_port) {
1487 ret = -ENOMEM;
1488 goto out;
1489 }
1490 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1491 pr_err("APTPL metadata initiator_node="
1492 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1493 PR_APTPL_MAX_IPORT_LEN);
1494 ret = -EINVAL;
1495 break;
1496 }
1497 break;
1498 case Opt_initiator_sid:
1499 isid = match_strdup(&args[0]);
1500 if (!isid) {
1501 ret = -ENOMEM;
1502 goto out;
1503 }
1504 if (strlen(isid) >= PR_REG_ISID_LEN) {
1505 pr_err("APTPL metadata initiator_isid"
1506 "= exceeds PR_REG_ISID_LEN: %d\n",
1507 PR_REG_ISID_LEN);
1508 ret = -EINVAL;
1509 break;
1510 }
1511 break;
1512 case Opt_sa_res_key:
1513 arg_p = match_strdup(&args[0]);
1514 if (!arg_p) {
1515 ret = -ENOMEM;
1516 goto out;
1517 }
1518 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1519 if (ret < 0) {
1520 pr_err("strict_strtoull() failed for"
1521 " sa_res_key=\n");
1522 goto out;
1523 }
1524 sa_res_key = (u64)tmp_ll;
1525 break;
1526 /*
1527 * PR APTPL Metadata for Reservation
1528 */
1529 case Opt_res_holder:
1530 match_int(args, &arg);
1531 res_holder = arg;
1532 break;
1533 case Opt_res_type:
1534 match_int(args, &arg);
1535 type = (u8)arg;
1536 break;
1537 case Opt_res_scope:
1538 match_int(args, &arg);
1539 scope = (u8)arg;
1540 break;
1541 case Opt_res_all_tg_pt:
1542 match_int(args, &arg);
1543 all_tg_pt = (int)arg;
1544 break;
1545 case Opt_mapped_lun:
1546 match_int(args, &arg);
1547 mapped_lun = (u32)arg;
1548 break;
1549 /*
1550 * PR APTPL Metadata for Target Port
1551 */
1552 case Opt_target_fabric:
1553 t_fabric = match_strdup(&args[0]);
1554 if (!t_fabric) {
1555 ret = -ENOMEM;
1556 goto out;
1557 }
1558 break;
1559 case Opt_target_node:
1560 t_port = match_strdup(&args[0]);
1561 if (!t_port) {
1562 ret = -ENOMEM;
1563 goto out;
1564 }
1565 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1566 pr_err("APTPL metadata target_node="
1567 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1568 PR_APTPL_MAX_TPORT_LEN);
1569 ret = -EINVAL;
1570 break;
1571 }
1572 break;
1573 case Opt_tpgt:
1574 match_int(args, &arg);
1575 tpgt = (u16)arg;
1576 break;
1577 case Opt_port_rtpi:
1578 match_int(args, &arg);
1579 port_rpti = (u16)arg;
1580 break;
1581 case Opt_target_lun:
1582 match_int(args, &arg);
1583 target_lun = (u32)arg;
1584 break;
1585 default:
1586 break;
1587 }
1588 }
1589
1590 if (!i_port || !t_port || !sa_res_key) {
1591 pr_err("Illegal parameters for APTPL registration\n");
1592 ret = -EINVAL;
1593 goto out;
1594 }
1595
1596 if (res_holder && !(type)) {
1597 pr_err("Illegal PR type: 0x%02x for reservation"
1598 " holder\n", type);
1599 ret = -EINVAL;
1600 goto out;
1601 }
1602
1603 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1604 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1605 res_holder, all_tg_pt, type);
1606out:
1607 kfree(i_fabric);
1608 kfree(i_port);
1609 kfree(isid);
1610 kfree(t_fabric);
1611 kfree(t_port);
1612 kfree(orig);
1613 return (ret == 0) ? count : ret;
1614}
1615
1616SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1617
1618CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1619
1620static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1621 &target_core_dev_pr_res_holder.attr,
1622 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1623 &target_core_dev_pr_res_pr_generation.attr,
1624 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1625 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1626 &target_core_dev_pr_res_pr_type.attr,
1627 &target_core_dev_pr_res_type.attr,
1628 &target_core_dev_pr_res_aptpl_active.attr,
1629 &target_core_dev_pr_res_aptpl_metadata.attr,
1630 NULL,
1631};
1632
1633static struct configfs_item_operations target_core_dev_pr_ops = {
1634 .show_attribute = target_core_dev_pr_attr_show,
1635 .store_attribute = target_core_dev_pr_attr_store,
1636};
1637
1638static struct config_item_type target_core_dev_pr_cit = {
1639 .ct_item_ops = &target_core_dev_pr_ops,
1640 .ct_attrs = target_core_dev_pr_attrs,
1641 .ct_owner = THIS_MODULE,
1642};
1643
1644/* End functions for struct config_item_type target_core_dev_pr_cit */
1645
1646/* Start functions for struct config_item_type target_core_dev_cit */
1647
1648static ssize_t target_core_show_dev_info(void *p, char *page)
1649{
1650 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1651 struct se_hba *hba = se_dev->se_dev_hba;
1652 struct se_subsystem_api *t = hba->transport;
1653 int bl = 0;
1654 ssize_t read_bytes = 0;
1655
1656 if (!se_dev->se_dev_ptr)
1657 return -ENODEV;
1658
1659 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1660 read_bytes += bl;
1661 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1662 return read_bytes;
1663}
1664
1665static struct target_core_configfs_attribute target_core_attr_dev_info = {
1666 .attr = { .ca_owner = THIS_MODULE,
1667 .ca_name = "info",
1668 .ca_mode = S_IRUGO },
1669 .show = target_core_show_dev_info,
1670 .store = NULL,
1671};
1672
1673static ssize_t target_core_store_dev_control(
1674 void *p,
1675 const char *page,
1676 size_t count)
1677{
1678 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1679 struct se_hba *hba = se_dev->se_dev_hba;
1680 struct se_subsystem_api *t = hba->transport;
1681
1682 if (!se_dev->se_dev_su_ptr) {
1683 pr_err("Unable to locate struct se_subsystem_dev>se"
1684 "_dev_su_ptr\n");
1685 return -EINVAL;
1686 }
1687
1688 return t->set_configfs_dev_params(hba, se_dev, page, count);
1689}
1690
1691static struct target_core_configfs_attribute target_core_attr_dev_control = {
1692 .attr = { .ca_owner = THIS_MODULE,
1693 .ca_name = "control",
1694 .ca_mode = S_IWUSR },
1695 .show = NULL,
1696 .store = target_core_store_dev_control,
1697};
1698
1699static ssize_t target_core_show_dev_alias(void *p, char *page)
1700{
1701 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1702
1703 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1704 return 0;
1705
1706 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1707}
1708
1709static ssize_t target_core_store_dev_alias(
1710 void *p,
1711 const char *page,
1712 size_t count)
1713{
1714 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1715 struct se_hba *hba = se_dev->se_dev_hba;
1716 ssize_t read_bytes;
1717
1718 if (count > (SE_DEV_ALIAS_LEN-1)) {
1719 pr_err("alias count: %d exceeds"
1720 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1721 SE_DEV_ALIAS_LEN-1);
1722 return -EINVAL;
1723 }
1724
1725 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1726 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1727 "%s", page);
1728
1729 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1730 config_item_name(&hba->hba_group.cg_item),
1731 config_item_name(&se_dev->se_dev_group.cg_item),
1732 se_dev->se_dev_alias);
1733
1734 return read_bytes;
1735}
1736
1737static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1738 .attr = { .ca_owner = THIS_MODULE,
1739 .ca_name = "alias",
1740 .ca_mode = S_IRUGO | S_IWUSR },
1741 .show = target_core_show_dev_alias,
1742 .store = target_core_store_dev_alias,
1743};
1744
1745static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1746{
1747 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1748
1749 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1750 return 0;
1751
1752 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1753}
1754
1755static ssize_t target_core_store_dev_udev_path(
1756 void *p,
1757 const char *page,
1758 size_t count)
1759{
1760 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1761 struct se_hba *hba = se_dev->se_dev_hba;
1762 ssize_t read_bytes;
1763
1764 if (count > (SE_UDEV_PATH_LEN-1)) {
1765 pr_err("udev_path count: %d exceeds"
1766 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1767 SE_UDEV_PATH_LEN-1);
1768 return -EINVAL;
1769 }
1770
1771 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1772 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1773 "%s", page);
1774
1775 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1776 config_item_name(&hba->hba_group.cg_item),
1777 config_item_name(&se_dev->se_dev_group.cg_item),
1778 se_dev->se_dev_udev_path);
1779
1780 return read_bytes;
1781}
1782
1783static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1784 .attr = { .ca_owner = THIS_MODULE,
1785 .ca_name = "udev_path",
1786 .ca_mode = S_IRUGO | S_IWUSR },
1787 .show = target_core_show_dev_udev_path,
1788 .store = target_core_store_dev_udev_path,
1789};
1790
1791static ssize_t target_core_store_dev_enable(
1792 void *p,
1793 const char *page,
1794 size_t count)
1795{
1796 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1797 struct se_device *dev;
1798 struct se_hba *hba = se_dev->se_dev_hba;
1799 struct se_subsystem_api *t = hba->transport;
1800 char *ptr;
1801
1802 ptr = strstr(page, "1");
1803 if (!ptr) {
1804 pr_err("For dev_enable ops, only valid value"
1805 " is \"1\"\n");
1806 return -EINVAL;
1807 }
1808 if (se_dev->se_dev_ptr) {
1809 pr_err("se_dev->se_dev_ptr already set for storage"
1810 " object\n");
1811 return -EEXIST;
1812 }
1813
1814 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1815 return -EINVAL;
1816
1817 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1818 if (IS_ERR(dev))
1819 return PTR_ERR(dev);
1820 else if (!dev)
1821 return -EINVAL;
1822
1823 se_dev->se_dev_ptr = dev;
1824 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1825 " %p\n", se_dev->se_dev_ptr);
1826
1827 return count;
1828}
1829
1830static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1831 .attr = { .ca_owner = THIS_MODULE,
1832 .ca_name = "enable",
1833 .ca_mode = S_IWUSR },
1834 .show = NULL,
1835 .store = target_core_store_dev_enable,
1836};
1837
1838static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1839{
1840 struct se_device *dev;
1841 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1842 struct config_item *lu_ci;
1843 struct t10_alua_lu_gp *lu_gp;
1844 struct t10_alua_lu_gp_member *lu_gp_mem;
1845 ssize_t len = 0;
1846
1847 dev = su_dev->se_dev_ptr;
1848 if (!dev)
1849 return -ENODEV;
1850
1851 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1852 return len;
1853
1854 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1855 if (!lu_gp_mem) {
1856 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1857 " pointer\n");
1858 return -EINVAL;
1859 }
1860
1861 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1862 lu_gp = lu_gp_mem->lu_gp;
1863 if (lu_gp) {
1864 lu_ci = &lu_gp->lu_gp_group.cg_item;
1865 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1866 config_item_name(lu_ci), lu_gp->lu_gp_id);
1867 }
1868 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1869
1870 return len;
1871}
1872
1873static ssize_t target_core_store_alua_lu_gp(
1874 void *p,
1875 const char *page,
1876 size_t count)
1877{
1878 struct se_device *dev;
1879 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1880 struct se_hba *hba = su_dev->se_dev_hba;
1881 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1882 struct t10_alua_lu_gp_member *lu_gp_mem;
1883 unsigned char buf[LU_GROUP_NAME_BUF];
1884 int move = 0;
1885
1886 dev = su_dev->se_dev_ptr;
1887 if (!dev)
1888 return -ENODEV;
1889
1890 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1891 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1892 config_item_name(&hba->hba_group.cg_item),
1893 config_item_name(&su_dev->se_dev_group.cg_item));
1894 return -EINVAL;
1895 }
1896 if (count > LU_GROUP_NAME_BUF) {
1897 pr_err("ALUA LU Group Alias too large!\n");
1898 return -EINVAL;
1899 }
1900 memset(buf, 0, LU_GROUP_NAME_BUF);
1901 memcpy(buf, page, count);
1902 /*
1903 * Any ALUA logical unit alias besides "NULL" means we will be
1904 * making a new group association.
1905 */
1906 if (strcmp(strstrip(buf), "NULL")) {
1907 /*
1908 * core_alua_get_lu_gp_by_name() will increment reference to
1909 * struct t10_alua_lu_gp. This reference is released with
1910 * core_alua_get_lu_gp_by_name below().
1911 */
1912 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1913 if (!lu_gp_new)
1914 return -ENODEV;
1915 }
1916 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1917 if (!lu_gp_mem) {
1918 if (lu_gp_new)
1919 core_alua_put_lu_gp_from_name(lu_gp_new);
1920 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1921 " pointer\n");
1922 return -EINVAL;
1923 }
1924
1925 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1926 lu_gp = lu_gp_mem->lu_gp;
1927 if (lu_gp) {
1928 /*
1929 * Clearing an existing lu_gp association, and replacing
1930 * with NULL
1931 */
1932 if (!lu_gp_new) {
1933 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1934 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1935 " %hu\n",
1936 config_item_name(&hba->hba_group.cg_item),
1937 config_item_name(&su_dev->se_dev_group.cg_item),
1938 config_item_name(&lu_gp->lu_gp_group.cg_item),
1939 lu_gp->lu_gp_id);
1940
1941 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1942 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1943
1944 return count;
1945 }
1946 /*
1947 * Removing existing association of lu_gp_mem with lu_gp
1948 */
1949 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1950 move = 1;
1951 }
1952 /*
1953 * Associate lu_gp_mem with lu_gp_new.
1954 */
1955 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1956 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1957
1958 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1959 " core/alua/lu_gps/%s, ID: %hu\n",
1960 (move) ? "Moving" : "Adding",
1961 config_item_name(&hba->hba_group.cg_item),
1962 config_item_name(&su_dev->se_dev_group.cg_item),
1963 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1964 lu_gp_new->lu_gp_id);
1965
1966 core_alua_put_lu_gp_from_name(lu_gp_new);
1967 return count;
1968}
1969
1970static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1971 .attr = { .ca_owner = THIS_MODULE,
1972 .ca_name = "alua_lu_gp",
1973 .ca_mode = S_IRUGO | S_IWUSR },
1974 .show = target_core_show_alua_lu_gp,
1975 .store = target_core_store_alua_lu_gp,
1976};
1977
1978static struct configfs_attribute *lio_core_dev_attrs[] = {
1979 &target_core_attr_dev_info.attr,
1980 &target_core_attr_dev_control.attr,
1981 &target_core_attr_dev_alias.attr,
1982 &target_core_attr_dev_udev_path.attr,
1983 &target_core_attr_dev_enable.attr,
1984 &target_core_attr_dev_alua_lu_gp.attr,
1985 NULL,
1986};
1987
1988static void target_core_dev_release(struct config_item *item)
1989{
1990 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1991 struct se_subsystem_dev, se_dev_group);
1992 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1993 struct se_subsystem_api *t = hba->transport;
1994 struct config_group *dev_cg = &se_dev->se_dev_group;
1995
1996 kfree(dev_cg->default_groups);
1997 /*
1998 * This pointer will set when the storage is enabled with:
1999 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2000 */
2001 if (se_dev->se_dev_ptr) {
2002 pr_debug("Target_Core_ConfigFS: Calling se_free_"
2003 "virtual_device() for se_dev_ptr: %p\n",
2004 se_dev->se_dev_ptr);
2005
2006 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2007 } else {
2008 /*
2009 * Release struct se_subsystem_dev->se_dev_su_ptr..
2010 */
2011 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2012 "device() for se_dev_su_ptr: %p\n",
2013 se_dev->se_dev_su_ptr);
2014
2015 t->free_device(se_dev->se_dev_su_ptr);
2016 }
2017
2018 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2019 "_dev_t: %p\n", se_dev);
2020 kfree(se_dev);
2021}
2022
2023static ssize_t target_core_dev_show(struct config_item *item,
2024 struct configfs_attribute *attr,
2025 char *page)
2026{
2027 struct se_subsystem_dev *se_dev = container_of(
2028 to_config_group(item), struct se_subsystem_dev,
2029 se_dev_group);
2030 struct target_core_configfs_attribute *tc_attr = container_of(
2031 attr, struct target_core_configfs_attribute, attr);
2032
2033 if (!tc_attr->show)
2034 return -EINVAL;
2035
2036 return tc_attr->show(se_dev, page);
2037}
2038
2039static ssize_t target_core_dev_store(struct config_item *item,
2040 struct configfs_attribute *attr,
2041 const char *page, size_t count)
2042{
2043 struct se_subsystem_dev *se_dev = container_of(
2044 to_config_group(item), struct se_subsystem_dev,
2045 se_dev_group);
2046 struct target_core_configfs_attribute *tc_attr = container_of(
2047 attr, struct target_core_configfs_attribute, attr);
2048
2049 if (!tc_attr->store)
2050 return -EINVAL;
2051
2052 return tc_attr->store(se_dev, page, count);
2053}
2054
2055static struct configfs_item_operations target_core_dev_item_ops = {
2056 .release = target_core_dev_release,
2057 .show_attribute = target_core_dev_show,
2058 .store_attribute = target_core_dev_store,
2059};
2060
2061static struct config_item_type target_core_dev_cit = {
2062 .ct_item_ops = &target_core_dev_item_ops,
2063 .ct_attrs = lio_core_dev_attrs,
2064 .ct_owner = THIS_MODULE,
2065};
2066
2067/* End functions for struct config_item_type target_core_dev_cit */
2068
2069/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2070
2071CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2072#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2073static struct target_core_alua_lu_gp_attribute \
2074 target_core_alua_lu_gp_##_name = \
2075 __CONFIGFS_EATTR(_name, _mode, \
2076 target_core_alua_lu_gp_show_attr_##_name, \
2077 target_core_alua_lu_gp_store_attr_##_name);
2078
2079#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2080static struct target_core_alua_lu_gp_attribute \
2081 target_core_alua_lu_gp_##_name = \
2082 __CONFIGFS_EATTR_RO(_name, \
2083 target_core_alua_lu_gp_show_attr_##_name);
2084
2085/*
2086 * lu_gp_id
2087 */
2088static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2089 struct t10_alua_lu_gp *lu_gp,
2090 char *page)
2091{
2092 if (!lu_gp->lu_gp_valid_id)
2093 return 0;
2094
2095 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2096}
2097
2098static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2099 struct t10_alua_lu_gp *lu_gp,
2100 const char *page,
2101 size_t count)
2102{
2103 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2104 unsigned long lu_gp_id;
2105 int ret;
2106
2107 ret = strict_strtoul(page, 0, &lu_gp_id);
2108 if (ret < 0) {
2109 pr_err("strict_strtoul() returned %d for"
2110 " lu_gp_id\n", ret);
2111 return -EINVAL;
2112 }
2113 if (lu_gp_id > 0x0000ffff) {
2114 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2115 " 0x0000ffff\n", lu_gp_id);
2116 return -EINVAL;
2117 }
2118
2119 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2120 if (ret < 0)
2121 return -EINVAL;
2122
2123 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2124 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2125 config_item_name(&alua_lu_gp_cg->cg_item),
2126 lu_gp->lu_gp_id);
2127
2128 return count;
2129}
2130
2131SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2132
2133/*
2134 * members
2135 */
2136static ssize_t target_core_alua_lu_gp_show_attr_members(
2137 struct t10_alua_lu_gp *lu_gp,
2138 char *page)
2139{
2140 struct se_device *dev;
2141 struct se_hba *hba;
2142 struct se_subsystem_dev *su_dev;
2143 struct t10_alua_lu_gp_member *lu_gp_mem;
2144 ssize_t len = 0, cur_len;
2145 unsigned char buf[LU_GROUP_NAME_BUF];
2146
2147 memset(buf, 0, LU_GROUP_NAME_BUF);
2148
2149 spin_lock(&lu_gp->lu_gp_lock);
2150 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2151 dev = lu_gp_mem->lu_gp_mem_dev;
2152 su_dev = dev->se_sub_dev;
2153 hba = su_dev->se_dev_hba;
2154
2155 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2156 config_item_name(&hba->hba_group.cg_item),
2157 config_item_name(&su_dev->se_dev_group.cg_item));
2158 cur_len++; /* Extra byte for NULL terminator */
2159
2160 if ((cur_len + len) > PAGE_SIZE) {
2161 pr_warn("Ran out of lu_gp_show_attr"
2162 "_members buffer\n");
2163 break;
2164 }
2165 memcpy(page+len, buf, cur_len);
2166 len += cur_len;
2167 }
2168 spin_unlock(&lu_gp->lu_gp_lock);
2169
2170 return len;
2171}
2172
2173SE_DEV_ALUA_LU_ATTR_RO(members);
2174
2175CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2176
2177static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2178 &target_core_alua_lu_gp_lu_gp_id.attr,
2179 &target_core_alua_lu_gp_members.attr,
2180 NULL,
2181};
2182
2183static void target_core_alua_lu_gp_release(struct config_item *item)
2184{
2185 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2186 struct t10_alua_lu_gp, lu_gp_group);
2187
2188 core_alua_free_lu_gp(lu_gp);
2189}
2190
2191static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2192 .release = target_core_alua_lu_gp_release,
2193 .show_attribute = target_core_alua_lu_gp_attr_show,
2194 .store_attribute = target_core_alua_lu_gp_attr_store,
2195};
2196
2197static struct config_item_type target_core_alua_lu_gp_cit = {
2198 .ct_item_ops = &target_core_alua_lu_gp_ops,
2199 .ct_attrs = target_core_alua_lu_gp_attrs,
2200 .ct_owner = THIS_MODULE,
2201};
2202
2203/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2204
2205/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2206
2207static struct config_group *target_core_alua_create_lu_gp(
2208 struct config_group *group,
2209 const char *name)
2210{
2211 struct t10_alua_lu_gp *lu_gp;
2212 struct config_group *alua_lu_gp_cg = NULL;
2213 struct config_item *alua_lu_gp_ci = NULL;
2214
2215 lu_gp = core_alua_allocate_lu_gp(name, 0);
2216 if (IS_ERR(lu_gp))
2217 return NULL;
2218
2219 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2220 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2221
2222 config_group_init_type_name(alua_lu_gp_cg, name,
2223 &target_core_alua_lu_gp_cit);
2224
2225 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2226 " Group: core/alua/lu_gps/%s\n",
2227 config_item_name(alua_lu_gp_ci));
2228
2229 return alua_lu_gp_cg;
2230
2231}
2232
2233static void target_core_alua_drop_lu_gp(
2234 struct config_group *group,
2235 struct config_item *item)
2236{
2237 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2238 struct t10_alua_lu_gp, lu_gp_group);
2239
2240 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2241 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2242 config_item_name(item), lu_gp->lu_gp_id);
2243 /*
2244 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2245 * -> target_core_alua_lu_gp_release()
2246 */
2247 config_item_put(item);
2248}
2249
2250static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2251 .make_group = &target_core_alua_create_lu_gp,
2252 .drop_item = &target_core_alua_drop_lu_gp,
2253};
2254
2255static struct config_item_type target_core_alua_lu_gps_cit = {
2256 .ct_item_ops = NULL,
2257 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2258 .ct_owner = THIS_MODULE,
2259};
2260
2261/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2262
2263/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2264
2265CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2266#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2267static struct target_core_alua_tg_pt_gp_attribute \
2268 target_core_alua_tg_pt_gp_##_name = \
2269 __CONFIGFS_EATTR(_name, _mode, \
2270 target_core_alua_tg_pt_gp_show_attr_##_name, \
2271 target_core_alua_tg_pt_gp_store_attr_##_name);
2272
2273#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2274static struct target_core_alua_tg_pt_gp_attribute \
2275 target_core_alua_tg_pt_gp_##_name = \
2276 __CONFIGFS_EATTR_RO(_name, \
2277 target_core_alua_tg_pt_gp_show_attr_##_name);
2278
2279/*
2280 * alua_access_state
2281 */
2282static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2283 struct t10_alua_tg_pt_gp *tg_pt_gp,
2284 char *page)
2285{
2286 return sprintf(page, "%d\n",
2287 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2288}
2289
2290static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2291 struct t10_alua_tg_pt_gp *tg_pt_gp,
2292 const char *page,
2293 size_t count)
2294{
2295 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2296 unsigned long tmp;
2297 int new_state, ret;
2298
2299 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2300 pr_err("Unable to do implict ALUA on non valid"
2301 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2302 return -EINVAL;
2303 }
2304
2305 ret = strict_strtoul(page, 0, &tmp);
2306 if (ret < 0) {
2307 pr_err("Unable to extract new ALUA access state from"
2308 " %s\n", page);
2309 return -EINVAL;
2310 }
2311 new_state = (int)tmp;
2312
2313 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2314 pr_err("Unable to process implict configfs ALUA"
2315 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2316 return -EINVAL;
2317 }
2318
2319 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2320 NULL, NULL, new_state, 0);
2321 return (!ret) ? count : -EINVAL;
2322}
2323
2324SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2325
2326/*
2327 * alua_access_status
2328 */
2329static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2330 struct t10_alua_tg_pt_gp *tg_pt_gp,
2331 char *page)
2332{
2333 return sprintf(page, "%s\n",
2334 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2335}
2336
2337static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2338 struct t10_alua_tg_pt_gp *tg_pt_gp,
2339 const char *page,
2340 size_t count)
2341{
2342 unsigned long tmp;
2343 int new_status, ret;
2344
2345 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2346 pr_err("Unable to do set ALUA access status on non"
2347 " valid tg_pt_gp ID: %hu\n",
2348 tg_pt_gp->tg_pt_gp_valid_id);
2349 return -EINVAL;
2350 }
2351
2352 ret = strict_strtoul(page, 0, &tmp);
2353 if (ret < 0) {
2354 pr_err("Unable to extract new ALUA access status"
2355 " from %s\n", page);
2356 return -EINVAL;
2357 }
2358 new_status = (int)tmp;
2359
2360 if ((new_status != ALUA_STATUS_NONE) &&
2361 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2362 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2363 pr_err("Illegal ALUA access status: 0x%02x\n",
2364 new_status);
2365 return -EINVAL;
2366 }
2367
2368 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2369 return count;
2370}
2371
2372SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2373
2374/*
2375 * alua_access_type
2376 */
2377static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2378 struct t10_alua_tg_pt_gp *tg_pt_gp,
2379 char *page)
2380{
2381 return core_alua_show_access_type(tg_pt_gp, page);
2382}
2383
2384static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2385 struct t10_alua_tg_pt_gp *tg_pt_gp,
2386 const char *page,
2387 size_t count)
2388{
2389 return core_alua_store_access_type(tg_pt_gp, page, count);
2390}
2391
2392SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2393
2394/*
2395 * alua_write_metadata
2396 */
2397static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2398 struct t10_alua_tg_pt_gp *tg_pt_gp,
2399 char *page)
2400{
2401 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2402}
2403
2404static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2405 struct t10_alua_tg_pt_gp *tg_pt_gp,
2406 const char *page,
2407 size_t count)
2408{
2409 unsigned long tmp;
2410 int ret;
2411
2412 ret = strict_strtoul(page, 0, &tmp);
2413 if (ret < 0) {
2414 pr_err("Unable to extract alua_write_metadata\n");
2415 return -EINVAL;
2416 }
2417
2418 if ((tmp != 0) && (tmp != 1)) {
2419 pr_err("Illegal value for alua_write_metadata:"
2420 " %lu\n", tmp);
2421 return -EINVAL;
2422 }
2423 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2424
2425 return count;
2426}
2427
2428SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2429
2430
2431
2432/*
2433 * nonop_delay_msecs
2434 */
2435static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2436 struct t10_alua_tg_pt_gp *tg_pt_gp,
2437 char *page)
2438{
2439 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2440
2441}
2442
2443static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2444 struct t10_alua_tg_pt_gp *tg_pt_gp,
2445 const char *page,
2446 size_t count)
2447{
2448 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2449}
2450
2451SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2452
2453/*
2454 * trans_delay_msecs
2455 */
2456static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2457 struct t10_alua_tg_pt_gp *tg_pt_gp,
2458 char *page)
2459{
2460 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2461}
2462
2463static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2464 struct t10_alua_tg_pt_gp *tg_pt_gp,
2465 const char *page,
2466 size_t count)
2467{
2468 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2469}
2470
2471SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2472
2473/*
2474 * preferred
2475 */
2476
2477static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2478 struct t10_alua_tg_pt_gp *tg_pt_gp,
2479 char *page)
2480{
2481 return core_alua_show_preferred_bit(tg_pt_gp, page);
2482}
2483
2484static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2485 struct t10_alua_tg_pt_gp *tg_pt_gp,
2486 const char *page,
2487 size_t count)
2488{
2489 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2490}
2491
2492SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2493
2494/*
2495 * tg_pt_gp_id
2496 */
2497static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2498 struct t10_alua_tg_pt_gp *tg_pt_gp,
2499 char *page)
2500{
2501 if (!tg_pt_gp->tg_pt_gp_valid_id)
2502 return 0;
2503
2504 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2505}
2506
2507static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2508 struct t10_alua_tg_pt_gp *tg_pt_gp,
2509 const char *page,
2510 size_t count)
2511{
2512 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2513 unsigned long tg_pt_gp_id;
2514 int ret;
2515
2516 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2517 if (ret < 0) {
2518 pr_err("strict_strtoul() returned %d for"
2519 " tg_pt_gp_id\n", ret);
2520 return -EINVAL;
2521 }
2522 if (tg_pt_gp_id > 0x0000ffff) {
2523 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2524 " 0x0000ffff\n", tg_pt_gp_id);
2525 return -EINVAL;
2526 }
2527
2528 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2529 if (ret < 0)
2530 return -EINVAL;
2531
2532 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2533 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2534 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2535 tg_pt_gp->tg_pt_gp_id);
2536
2537 return count;
2538}
2539
2540SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2541
2542/*
2543 * members
2544 */
2545static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2546 struct t10_alua_tg_pt_gp *tg_pt_gp,
2547 char *page)
2548{
2549 struct se_port *port;
2550 struct se_portal_group *tpg;
2551 struct se_lun *lun;
2552 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2553 ssize_t len = 0, cur_len;
2554 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2555
2556 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2557
2558 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2559 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2560 tg_pt_gp_mem_list) {
2561 port = tg_pt_gp_mem->tg_pt;
2562 tpg = port->sep_tpg;
2563 lun = port->sep_lun;
2564
2565 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2566 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2567 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2568 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2569 config_item_name(&lun->lun_group.cg_item));
2570 cur_len++; /* Extra byte for NULL terminator */
2571
2572 if ((cur_len + len) > PAGE_SIZE) {
2573 pr_warn("Ran out of lu_gp_show_attr"
2574 "_members buffer\n");
2575 break;
2576 }
2577 memcpy(page+len, buf, cur_len);
2578 len += cur_len;
2579 }
2580 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2581
2582 return len;
2583}
2584
2585SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2586
2587CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2588 tg_pt_gp_group);
2589
2590static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2591 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2592 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2593 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2594 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2595 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2596 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2597 &target_core_alua_tg_pt_gp_preferred.attr,
2598 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2599 &target_core_alua_tg_pt_gp_members.attr,
2600 NULL,
2601};
2602
2603static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2604{
2605 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2606 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2607
2608 core_alua_free_tg_pt_gp(tg_pt_gp);
2609}
2610
2611static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2612 .release = target_core_alua_tg_pt_gp_release,
2613 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2614 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2615};
2616
2617static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2618 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2619 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2620 .ct_owner = THIS_MODULE,
2621};
2622
2623/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2624
2625/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2626
2627static struct config_group *target_core_alua_create_tg_pt_gp(
2628 struct config_group *group,
2629 const char *name)
2630{
2631 struct t10_alua *alua = container_of(group, struct t10_alua,
2632 alua_tg_pt_gps_group);
2633 struct t10_alua_tg_pt_gp *tg_pt_gp;
2634 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2635 struct config_group *alua_tg_pt_gp_cg = NULL;
2636 struct config_item *alua_tg_pt_gp_ci = NULL;
2637
2638 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2639 if (!tg_pt_gp)
2640 return NULL;
2641
2642 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2643 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2644
2645 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2646 &target_core_alua_tg_pt_gp_cit);
2647
2648 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2649 " Group: alua/tg_pt_gps/%s\n",
2650 config_item_name(alua_tg_pt_gp_ci));
2651
2652 return alua_tg_pt_gp_cg;
2653}
2654
2655static void target_core_alua_drop_tg_pt_gp(
2656 struct config_group *group,
2657 struct config_item *item)
2658{
2659 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2660 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2661
2662 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2663 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2664 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2665 /*
2666 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2667 * -> target_core_alua_tg_pt_gp_release().
2668 */
2669 config_item_put(item);
2670}
2671
2672static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2673 .make_group = &target_core_alua_create_tg_pt_gp,
2674 .drop_item = &target_core_alua_drop_tg_pt_gp,
2675};
2676
2677static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2678 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2679 .ct_owner = THIS_MODULE,
2680};
2681
2682/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2683
2684/* Start functions for struct config_item_type target_core_alua_cit */
2685
2686/*
2687 * target_core_alua_cit is a ConfigFS group that lives under
2688 * /sys/kernel/config/target/core/alua. There are default groups
2689 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2690 * target_core_alua_cit in target_core_init_configfs() below.
2691 */
2692static struct config_item_type target_core_alua_cit = {
2693 .ct_item_ops = NULL,
2694 .ct_attrs = NULL,
2695 .ct_owner = THIS_MODULE,
2696};
2697
2698/* End functions for struct config_item_type target_core_alua_cit */
2699
2700/* Start functions for struct config_item_type target_core_stat_cit */
2701
2702static struct config_group *target_core_stat_mkdir(
2703 struct config_group *group,
2704 const char *name)
2705{
2706 return ERR_PTR(-ENOSYS);
2707}
2708
2709static void target_core_stat_rmdir(
2710 struct config_group *group,
2711 struct config_item *item)
2712{
2713 return;
2714}
2715
2716static struct configfs_group_operations target_core_stat_group_ops = {
2717 .make_group = &target_core_stat_mkdir,
2718 .drop_item = &target_core_stat_rmdir,
2719};
2720
2721static struct config_item_type target_core_stat_cit = {
2722 .ct_group_ops = &target_core_stat_group_ops,
2723 .ct_owner = THIS_MODULE,
2724};
2725
2726/* End functions for struct config_item_type target_core_stat_cit */
2727
2728/* Start functions for struct config_item_type target_core_hba_cit */
2729
2730static struct config_group *target_core_make_subdev(
2731 struct config_group *group,
2732 const char *name)
2733{
2734 struct t10_alua_tg_pt_gp *tg_pt_gp;
2735 struct se_subsystem_dev *se_dev;
2736 struct se_subsystem_api *t;
2737 struct config_item *hba_ci = &group->cg_item;
2738 struct se_hba *hba = item_to_hba(hba_ci);
2739 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2740 struct config_group *dev_stat_grp = NULL;
2741 int errno = -ENOMEM, ret;
2742
2743 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2744 if (ret)
2745 return ERR_PTR(ret);
2746 /*
2747 * Locate the struct se_subsystem_api from parent's struct se_hba.
2748 */
2749 t = hba->transport;
2750
2751 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2752 if (!se_dev) {
2753 pr_err("Unable to allocate memory for"
2754 " struct se_subsystem_dev\n");
2755 goto unlock;
2756 }
2757 INIT_LIST_HEAD(&se_dev->se_dev_node);
2758 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2759 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2760 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2761 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2762 spin_lock_init(&se_dev->t10_pr.registration_lock);
2763 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2764 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2765 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2766 spin_lock_init(&se_dev->se_dev_lock);
2767 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2768 se_dev->t10_wwn.t10_sub_dev = se_dev;
2769 se_dev->t10_alua.t10_sub_dev = se_dev;
2770 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2771
2772 se_dev->se_dev_hba = hba;
2773 dev_cg = &se_dev->se_dev_group;
2774
2775 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2776 GFP_KERNEL);
2777 if (!dev_cg->default_groups)
2778 goto out;
2779 /*
2780 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2781 * for ->allocate_virtdevice()
2782 *
2783 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2784 * has been called successfully in the next level up in the
2785 * configfs tree for device object's struct config_group.
2786 */
2787 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2788 if (!se_dev->se_dev_su_ptr) {
2789 pr_err("Unable to locate subsystem dependent pointer"
2790 " from allocate_virtdevice()\n");
2791 goto out;
2792 }
2793 spin_lock(&se_device_lock);
2794 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2795 spin_unlock(&se_device_lock);
2796
2797 config_group_init_type_name(&se_dev->se_dev_group, name,
2798 &target_core_dev_cit);
2799 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2800 &target_core_dev_attrib_cit);
2801 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2802 &target_core_dev_pr_cit);
2803 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2804 &target_core_dev_wwn_cit);
2805 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2806 "alua", &target_core_alua_tg_pt_gps_cit);
2807 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2808 "statistics", &target_core_stat_cit);
2809
2810 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2811 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2812 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2813 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2814 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2815 dev_cg->default_groups[5] = NULL;
2816 /*
2817 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2818 */
2819 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2820 if (!tg_pt_gp)
2821 goto out;
2822
2823 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2824 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2825 GFP_KERNEL);
2826 if (!tg_pt_gp_cg->default_groups) {
2827 pr_err("Unable to allocate tg_pt_gp_cg->"
2828 "default_groups\n");
2829 goto out;
2830 }
2831
2832 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2833 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2834 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2835 tg_pt_gp_cg->default_groups[1] = NULL;
2836 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2837 /*
2838 * Add core/$HBA/$DEV/statistics/ default groups
2839 */
2840 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2841 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2842 GFP_KERNEL);
2843 if (!dev_stat_grp->default_groups) {
2844 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2845 goto out;
2846 }
2847 target_stat_setup_dev_default_groups(se_dev);
2848
2849 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2850 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2851
2852 mutex_unlock(&hba->hba_access_mutex);
2853 return &se_dev->se_dev_group;
2854out:
2855 if (se_dev->t10_alua.default_tg_pt_gp) {
2856 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2857 se_dev->t10_alua.default_tg_pt_gp = NULL;
2858 }
2859 if (dev_stat_grp)
2860 kfree(dev_stat_grp->default_groups);
2861 if (tg_pt_gp_cg)
2862 kfree(tg_pt_gp_cg->default_groups);
2863 if (dev_cg)
2864 kfree(dev_cg->default_groups);
2865 if (se_dev->se_dev_su_ptr)
2866 t->free_device(se_dev->se_dev_su_ptr);
2867 kfree(se_dev);
2868unlock:
2869 mutex_unlock(&hba->hba_access_mutex);
2870 return ERR_PTR(errno);
2871}
2872
2873static void target_core_drop_subdev(
2874 struct config_group *group,
2875 struct config_item *item)
2876{
2877 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2878 struct se_subsystem_dev, se_dev_group);
2879 struct se_hba *hba;
2880 struct se_subsystem_api *t;
2881 struct config_item *df_item;
2882 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2883 int i;
2884
2885 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2886
2887 mutex_lock(&hba->hba_access_mutex);
2888 t = hba->transport;
2889
2890 spin_lock(&se_device_lock);
2891 list_del(&se_dev->se_dev_node);
2892 spin_unlock(&se_device_lock);
2893
2894 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2895 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2896 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2897 dev_stat_grp->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
2900 kfree(dev_stat_grp->default_groups);
2901
2902 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2903 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2904 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2905 tg_pt_gp_cg->default_groups[i] = NULL;
2906 config_item_put(df_item);
2907 }
2908 kfree(tg_pt_gp_cg->default_groups);
2909 /*
2910 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2911 * directly from target_core_alua_tg_pt_gp_release().
2912 */
2913 se_dev->t10_alua.default_tg_pt_gp = NULL;
2914
2915 dev_cg = &se_dev->se_dev_group;
2916 for (i = 0; dev_cg->default_groups[i]; i++) {
2917 df_item = &dev_cg->default_groups[i]->cg_item;
2918 dev_cg->default_groups[i] = NULL;
2919 config_item_put(df_item);
2920 }
2921 /*
2922 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2923 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2924 */
2925 config_item_put(item);
2926 mutex_unlock(&hba->hba_access_mutex);
2927}
2928
2929static struct configfs_group_operations target_core_hba_group_ops = {
2930 .make_group = target_core_make_subdev,
2931 .drop_item = target_core_drop_subdev,
2932};
2933
2934CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2935#define SE_HBA_ATTR(_name, _mode) \
2936static struct target_core_hba_attribute \
2937 target_core_hba_##_name = \
2938 __CONFIGFS_EATTR(_name, _mode, \
2939 target_core_hba_show_attr_##_name, \
2940 target_core_hba_store_attr_##_name);
2941
2942#define SE_HBA_ATTR_RO(_name) \
2943static struct target_core_hba_attribute \
2944 target_core_hba_##_name = \
2945 __CONFIGFS_EATTR_RO(_name, \
2946 target_core_hba_show_attr_##_name);
2947
2948static ssize_t target_core_hba_show_attr_hba_info(
2949 struct se_hba *hba,
2950 char *page)
2951{
2952 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2953 hba->hba_id, hba->transport->name,
2954 TARGET_CORE_CONFIGFS_VERSION);
2955}
2956
2957SE_HBA_ATTR_RO(hba_info);
2958
2959static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2960 char *page)
2961{
2962 int hba_mode = 0;
2963
2964 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2965 hba_mode = 1;
2966
2967 return sprintf(page, "%d\n", hba_mode);
2968}
2969
2970static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2971 const char *page, size_t count)
2972{
2973 struct se_subsystem_api *transport = hba->transport;
2974 unsigned long mode_flag;
2975 int ret;
2976
2977 if (transport->pmode_enable_hba == NULL)
2978 return -EINVAL;
2979
2980 ret = strict_strtoul(page, 0, &mode_flag);
2981 if (ret < 0) {
2982 pr_err("Unable to extract hba mode flag: %d\n", ret);
2983 return -EINVAL;
2984 }
2985
2986 spin_lock(&hba->device_lock);
2987 if (!list_empty(&hba->hba_dev_list)) {
2988 pr_err("Unable to set hba_mode with active devices\n");
2989 spin_unlock(&hba->device_lock);
2990 return -EINVAL;
2991 }
2992 spin_unlock(&hba->device_lock);
2993
2994 ret = transport->pmode_enable_hba(hba, mode_flag);
2995 if (ret < 0)
2996 return -EINVAL;
2997 if (ret > 0)
2998 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2999 else if (ret == 0)
3000 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3001
3002 return count;
3003}
3004
3005SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3006
3007CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3008
3009static void target_core_hba_release(struct config_item *item)
3010{
3011 struct se_hba *hba = container_of(to_config_group(item),
3012 struct se_hba, hba_group);
3013 core_delete_hba(hba);
3014}
3015
3016static struct configfs_attribute *target_core_hba_attrs[] = {
3017 &target_core_hba_hba_info.attr,
3018 &target_core_hba_hba_mode.attr,
3019 NULL,
3020};
3021
3022static struct configfs_item_operations target_core_hba_item_ops = {
3023 .release = target_core_hba_release,
3024 .show_attribute = target_core_hba_attr_show,
3025 .store_attribute = target_core_hba_attr_store,
3026};
3027
3028static struct config_item_type target_core_hba_cit = {
3029 .ct_item_ops = &target_core_hba_item_ops,
3030 .ct_group_ops = &target_core_hba_group_ops,
3031 .ct_attrs = target_core_hba_attrs,
3032 .ct_owner = THIS_MODULE,
3033};
3034
3035static struct config_group *target_core_call_addhbatotarget(
3036 struct config_group *group,
3037 const char *name)
3038{
3039 char *se_plugin_str, *str, *str2;
3040 struct se_hba *hba;
3041 char buf[TARGET_CORE_NAME_MAX_LEN];
3042 unsigned long plugin_dep_id = 0;
3043 int ret;
3044
3045 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3046 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3047 pr_err("Passed *name strlen(): %d exceeds"
3048 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3049 TARGET_CORE_NAME_MAX_LEN);
3050 return ERR_PTR(-ENAMETOOLONG);
3051 }
3052 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3053
3054 str = strstr(buf, "_");
3055 if (!str) {
3056 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3057 return ERR_PTR(-EINVAL);
3058 }
3059 se_plugin_str = buf;
3060 /*
3061 * Special case for subsystem plugins that have "_" in their names.
3062 * Namely rd_direct and rd_mcp..
3063 */
3064 str2 = strstr(str+1, "_");
3065 if (str2) {
3066 *str2 = '\0'; /* Terminate for *se_plugin_str */
3067 str2++; /* Skip to start of plugin dependent ID */
3068 str = str2;
3069 } else {
3070 *str = '\0'; /* Terminate for *se_plugin_str */
3071 str++; /* Skip to start of plugin dependent ID */
3072 }
3073
3074 ret = strict_strtoul(str, 0, &plugin_dep_id);
3075 if (ret < 0) {
3076 pr_err("strict_strtoul() returned %d for"
3077 " plugin_dep_id\n", ret);
3078 return ERR_PTR(-EINVAL);
3079 }
3080 /*
3081 * Load up TCM subsystem plugins if they have not already been loaded.
3082 */
3083 if (transport_subsystem_check_init() < 0)
3084 return ERR_PTR(-EINVAL);
3085
3086 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3087 if (IS_ERR(hba))
3088 return ERR_CAST(hba);
3089
3090 config_group_init_type_name(&hba->hba_group, name,
3091 &target_core_hba_cit);
3092
3093 return &hba->hba_group;
3094}
3095
3096static void target_core_call_delhbafromtarget(
3097 struct config_group *group,
3098 struct config_item *item)
3099{
3100 /*
3101 * core_delete_hba() is called from target_core_hba_item_ops->release()
3102 * -> target_core_hba_release()
3103 */
3104 config_item_put(item);
3105}
3106
3107static struct configfs_group_operations target_core_group_ops = {
3108 .make_group = target_core_call_addhbatotarget,
3109 .drop_item = target_core_call_delhbafromtarget,
3110};
3111
3112static struct config_item_type target_core_cit = {
3113 .ct_item_ops = NULL,
3114 .ct_group_ops = &target_core_group_ops,
3115 .ct_attrs = NULL,
3116 .ct_owner = THIS_MODULE,
3117};
3118
3119/* Stop functions for struct config_item_type target_core_hba_cit */
3120
3121static int __init target_core_init_configfs(void)
3122{
3123 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3124 struct config_group *lu_gp_cg = NULL;
3125 struct configfs_subsystem *subsys;
3126 struct t10_alua_lu_gp *lu_gp;
3127 int ret;
3128
3129 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3130 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3131 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3132
3133 subsys = target_core_subsystem[0];
3134 config_group_init(&subsys->su_group);
3135 mutex_init(&subsys->su_mutex);
3136
3137 INIT_LIST_HEAD(&g_tf_list);
3138 mutex_init(&g_tf_lock);
3139 ret = init_se_kmem_caches();
3140 if (ret < 0)
3141 return ret;
3142 /*
3143 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3144 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3145 */
3146 target_cg = &subsys->su_group;
3147 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3148 GFP_KERNEL);
3149 if (!target_cg->default_groups) {
3150 pr_err("Unable to allocate target_cg->default_groups\n");
3151 goto out_global;
3152 }
3153
3154 config_group_init_type_name(&target_core_hbagroup,
3155 "core", &target_core_cit);
3156 target_cg->default_groups[0] = &target_core_hbagroup;
3157 target_cg->default_groups[1] = NULL;
3158 /*
3159 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3160 */
3161 hba_cg = &target_core_hbagroup;
3162 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3163 GFP_KERNEL);
3164 if (!hba_cg->default_groups) {
3165 pr_err("Unable to allocate hba_cg->default_groups\n");
3166 goto out_global;
3167 }
3168 config_group_init_type_name(&alua_group,
3169 "alua", &target_core_alua_cit);
3170 hba_cg->default_groups[0] = &alua_group;
3171 hba_cg->default_groups[1] = NULL;
3172 /*
3173 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3174 * groups under /sys/kernel/config/target/core/alua/
3175 */
3176 alua_cg = &alua_group;
3177 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3178 GFP_KERNEL);
3179 if (!alua_cg->default_groups) {
3180 pr_err("Unable to allocate alua_cg->default_groups\n");
3181 goto out_global;
3182 }
3183
3184 config_group_init_type_name(&alua_lu_gps_group,
3185 "lu_gps", &target_core_alua_lu_gps_cit);
3186 alua_cg->default_groups[0] = &alua_lu_gps_group;
3187 alua_cg->default_groups[1] = NULL;
3188 /*
3189 * Add core/alua/lu_gps/default_lu_gp
3190 */
3191 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3192 if (IS_ERR(lu_gp))
3193 goto out_global;
3194
3195 lu_gp_cg = &alua_lu_gps_group;
3196 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3197 GFP_KERNEL);
3198 if (!lu_gp_cg->default_groups) {
3199 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3200 goto out_global;
3201 }
3202
3203 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3204 &target_core_alua_lu_gp_cit);
3205 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3206 lu_gp_cg->default_groups[1] = NULL;
3207 default_lu_gp = lu_gp;
3208 /*
3209 * Register the target_core_mod subsystem with configfs.
3210 */
3211 ret = configfs_register_subsystem(subsys);
3212 if (ret < 0) {
3213 pr_err("Error %d while registering subsystem %s\n",
3214 ret, subsys->su_group.cg_item.ci_namebuf);
3215 goto out_global;
3216 }
3217 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3218 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3219 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3220 /*
3221 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3222 */
3223 ret = rd_module_init();
3224 if (ret < 0)
3225 goto out;
3226
3227 if (core_dev_setup_virtual_lun0() < 0)
3228 goto out;
3229
3230 return 0;
3231
3232out:
3233 configfs_unregister_subsystem(subsys);
3234 core_dev_release_virtual_lun0();
3235 rd_module_exit();
3236out_global:
3237 if (default_lu_gp) {
3238 core_alua_free_lu_gp(default_lu_gp);
3239 default_lu_gp = NULL;
3240 }
3241 if (lu_gp_cg)
3242 kfree(lu_gp_cg->default_groups);
3243 if (alua_cg)
3244 kfree(alua_cg->default_groups);
3245 if (hba_cg)
3246 kfree(hba_cg->default_groups);
3247 kfree(target_cg->default_groups);
3248 release_se_kmem_caches();
3249 return ret;
3250}
3251
3252static void __exit target_core_exit_configfs(void)
3253{
3254 struct configfs_subsystem *subsys;
3255 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3256 struct config_item *item;
3257 int i;
3258
3259 subsys = target_core_subsystem[0];
3260
3261 lu_gp_cg = &alua_lu_gps_group;
3262 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3263 item = &lu_gp_cg->default_groups[i]->cg_item;
3264 lu_gp_cg->default_groups[i] = NULL;
3265 config_item_put(item);
3266 }
3267 kfree(lu_gp_cg->default_groups);
3268 lu_gp_cg->default_groups = NULL;
3269
3270 alua_cg = &alua_group;
3271 for (i = 0; alua_cg->default_groups[i]; i++) {
3272 item = &alua_cg->default_groups[i]->cg_item;
3273 alua_cg->default_groups[i] = NULL;
3274 config_item_put(item);
3275 }
3276 kfree(alua_cg->default_groups);
3277 alua_cg->default_groups = NULL;
3278
3279 hba_cg = &target_core_hbagroup;
3280 for (i = 0; hba_cg->default_groups[i]; i++) {
3281 item = &hba_cg->default_groups[i]->cg_item;
3282 hba_cg->default_groups[i] = NULL;
3283 config_item_put(item);
3284 }
3285 kfree(hba_cg->default_groups);
3286 hba_cg->default_groups = NULL;
3287 /*
3288 * We expect subsys->su_group.default_groups to be released
3289 * by configfs subsystem provider logic..
3290 */
3291 configfs_unregister_subsystem(subsys);
3292 kfree(subsys->su_group.default_groups);
3293
3294 core_alua_free_lu_gp(default_lu_gp);
3295 default_lu_gp = NULL;
3296
3297 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3298 " Infrastructure\n");
3299
3300 core_dev_release_virtual_lun0();
3301 rd_module_exit();
3302 release_se_kmem_caches();
3303}
3304
3305MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3306MODULE_AUTHOR("nab@Linux-iSCSI.org");
3307MODULE_LICENSE("GPL");
3308
3309module_init(target_core_init_configfs);
3310module_exit(target_core_exit_configfs);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*******************************************************************************
3 * Filename: target_core_configfs.c
4 *
5 * This file contains ConfigFS logic for the Generic Target Engine project.
6 *
7 * (c) Copyright 2008-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 ****************************************************************************/
14
15#include <linux/module.h>
16#include <linux/moduleparam.h>
17#include <generated/utsrelease.h>
18#include <linux/utsname.h>
19#include <linux/init.h>
20#include <linux/fs.h>
21#include <linux/namei.h>
22#include <linux/slab.h>
23#include <linux/types.h>
24#include <linux/delay.h>
25#include <linux/unistd.h>
26#include <linux/string.h>
27#include <linux/parser.h>
28#include <linux/syscalls.h>
29#include <linux/configfs.h>
30#include <linux/spinlock.h>
31
32#include <target/target_core_base.h>
33#include <target/target_core_backend.h>
34#include <target/target_core_fabric.h>
35
36#include "target_core_internal.h"
37#include "target_core_alua.h"
38#include "target_core_pr.h"
39#include "target_core_rd.h"
40#include "target_core_xcopy.h"
41
42#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
43static void target_core_setup_##_name##_cit(struct target_backend *tb) \
44{ \
45 struct config_item_type *cit = &tb->tb_##_name##_cit; \
46 \
47 cit->ct_item_ops = _item_ops; \
48 cit->ct_group_ops = _group_ops; \
49 cit->ct_attrs = _attrs; \
50 cit->ct_owner = tb->ops->owner; \
51 pr_debug("Setup generic %s\n", __stringify(_name)); \
52}
53
54#define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
55static void target_core_setup_##_name##_cit(struct target_backend *tb) \
56{ \
57 struct config_item_type *cit = &tb->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
62 cit->ct_owner = tb->ops->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64}
65
66extern struct t10_alua_lu_gp *default_lu_gp;
67
68static LIST_HEAD(g_tf_list);
69static DEFINE_MUTEX(g_tf_lock);
70
71static struct config_group target_core_hbagroup;
72static struct config_group alua_group;
73static struct config_group alua_lu_gps_group;
74
75static inline struct se_hba *
76item_to_hba(struct config_item *item)
77{
78 return container_of(to_config_group(item), struct se_hba, hba_group);
79}
80
81/*
82 * Attributes for /sys/kernel/config/target/
83 */
84static ssize_t target_core_item_version_show(struct config_item *item,
85 char *page)
86{
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
89 utsname()->sysname, utsname()->machine);
90}
91
92CONFIGFS_ATTR_RO(target_core_item_, version);
93
94char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
95static char db_root_stage[DB_ROOT_LEN];
96
97static ssize_t target_core_item_dbroot_show(struct config_item *item,
98 char *page)
99{
100 return sprintf(page, "%s\n", db_root);
101}
102
103static ssize_t target_core_item_dbroot_store(struct config_item *item,
104 const char *page, size_t count)
105{
106 ssize_t read_bytes;
107 struct file *fp;
108
109 mutex_lock(&g_tf_lock);
110 if (!list_empty(&g_tf_list)) {
111 mutex_unlock(&g_tf_lock);
112 pr_err("db_root: cannot be changed: target drivers registered");
113 return -EINVAL;
114 }
115
116 if (count > (DB_ROOT_LEN - 1)) {
117 mutex_unlock(&g_tf_lock);
118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
119 (int)count, DB_ROOT_LEN - 1);
120 return -EINVAL;
121 }
122
123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
124 if (!read_bytes) {
125 mutex_unlock(&g_tf_lock);
126 return -EINVAL;
127 }
128 if (db_root_stage[read_bytes - 1] == '\n')
129 db_root_stage[read_bytes - 1] = '\0';
130
131 /* validate new db root before accepting it */
132 fp = filp_open(db_root_stage, O_RDONLY, 0);
133 if (IS_ERR(fp)) {
134 mutex_unlock(&g_tf_lock);
135 pr_err("db_root: cannot open: %s\n", db_root_stage);
136 return -EINVAL;
137 }
138 if (!S_ISDIR(file_inode(fp)->i_mode)) {
139 filp_close(fp, NULL);
140 mutex_unlock(&g_tf_lock);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 return -EINVAL;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147
148 mutex_unlock(&g_tf_lock);
149
150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
151
152 return read_bytes;
153}
154
155CONFIGFS_ATTR(target_core_item_, dbroot);
156
157static struct target_fabric_configfs *target_core_get_fabric(
158 const char *name)
159{
160 struct target_fabric_configfs *tf;
161
162 if (!name)
163 return NULL;
164
165 mutex_lock(&g_tf_lock);
166 list_for_each_entry(tf, &g_tf_list, tf_list) {
167 const char *cmp_name = tf->tf_ops->fabric_alias;
168 if (!cmp_name)
169 cmp_name = tf->tf_ops->fabric_name;
170 if (!strcmp(cmp_name, name)) {
171 atomic_inc(&tf->tf_access_cnt);
172 mutex_unlock(&g_tf_lock);
173 return tf;
174 }
175 }
176 mutex_unlock(&g_tf_lock);
177
178 return NULL;
179}
180
181/*
182 * Called from struct target_core_group_ops->make_group()
183 */
184static struct config_group *target_core_register_fabric(
185 struct config_group *group,
186 const char *name)
187{
188 struct target_fabric_configfs *tf;
189 int ret;
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
192 " %s\n", group, name);
193
194 tf = target_core_get_fabric(name);
195 if (!tf) {
196 pr_debug("target_core_register_fabric() trying autoload for %s\n",
197 name);
198
199 /*
200 * Below are some hardcoded request_module() calls to automatically
201 * local fabric modules when the following is called:
202 *
203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
204 *
205 * Note that this does not limit which TCM fabric module can be
206 * registered, but simply provids auto loading logic for modules with
207 * mkdir(2) system calls with known TCM fabric modules.
208 */
209
210 if (!strncmp(name, "iscsi", 5)) {
211 /*
212 * Automatically load the LIO Target fabric module when the
213 * following is called:
214 *
215 * mkdir -p $CONFIGFS/target/iscsi
216 */
217 ret = request_module("iscsi_target_mod");
218 if (ret < 0) {
219 pr_debug("request_module() failed for"
220 " iscsi_target_mod.ko: %d\n", ret);
221 return ERR_PTR(-EINVAL);
222 }
223 } else if (!strncmp(name, "loopback", 8)) {
224 /*
225 * Automatically load the tcm_loop fabric module when the
226 * following is called:
227 *
228 * mkdir -p $CONFIGFS/target/loopback
229 */
230 ret = request_module("tcm_loop");
231 if (ret < 0) {
232 pr_debug("request_module() failed for"
233 " tcm_loop.ko: %d\n", ret);
234 return ERR_PTR(-EINVAL);
235 }
236 }
237
238 tf = target_core_get_fabric(name);
239 }
240
241 if (!tf) {
242 pr_debug("target_core_get_fabric() failed for %s\n",
243 name);
244 return ERR_PTR(-EINVAL);
245 }
246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
247 " %s\n", tf->tf_ops->fabric_name);
248 /*
249 * On a successful target_core_get_fabric() look, the returned
250 * struct target_fabric_configfs *tf will contain a usage reference.
251 */
252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
253 &tf->tf_wwn_cit);
254
255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
256
257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
258 &tf->tf_discovery_cit);
259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
260
261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
262 config_item_name(&tf->tf_group.cg_item));
263 return &tf->tf_group;
264}
265
266/*
267 * Called from struct target_core_group_ops->drop_item()
268 */
269static void target_core_deregister_fabric(
270 struct config_group *group,
271 struct config_item *item)
272{
273 struct target_fabric_configfs *tf = container_of(
274 to_config_group(item), struct target_fabric_configfs, tf_group);
275
276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
277 " tf list\n", config_item_name(item));
278
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
280 " %s\n", tf->tf_ops->fabric_name);
281 atomic_dec(&tf->tf_access_cnt);
282
283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
284 " %s\n", config_item_name(item));
285
286 configfs_remove_default_groups(&tf->tf_group);
287 config_item_put(item);
288}
289
290static struct configfs_group_operations target_core_fabric_group_ops = {
291 .make_group = &target_core_register_fabric,
292 .drop_item = &target_core_deregister_fabric,
293};
294
295/*
296 * All item attributes appearing in /sys/kernel/target/ appear here.
297 */
298static struct configfs_attribute *target_core_fabric_item_attrs[] = {
299 &target_core_item_attr_version,
300 &target_core_item_attr_dbroot,
301 NULL,
302};
303
304/*
305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
306 */
307static const struct config_item_type target_core_fabrics_item = {
308 .ct_group_ops = &target_core_fabric_group_ops,
309 .ct_attrs = target_core_fabric_item_attrs,
310 .ct_owner = THIS_MODULE,
311};
312
313static struct configfs_subsystem target_core_fabrics = {
314 .su_group = {
315 .cg_item = {
316 .ci_namebuf = "target",
317 .ci_type = &target_core_fabrics_item,
318 },
319 },
320};
321
322int target_depend_item(struct config_item *item)
323{
324 return configfs_depend_item(&target_core_fabrics, item);
325}
326EXPORT_SYMBOL(target_depend_item);
327
328void target_undepend_item(struct config_item *item)
329{
330 return configfs_undepend_item(item);
331}
332EXPORT_SYMBOL(target_undepend_item);
333
334/*##############################################################################
335// Start functions called by external Target Fabrics Modules
336//############################################################################*/
337
338static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
339{
340 if (tfo->fabric_alias) {
341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
342 pr_err("Passed alias: %s exceeds "
343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
344 return -EINVAL;
345 }
346 }
347 if (!tfo->fabric_name) {
348 pr_err("Missing tfo->fabric_name\n");
349 return -EINVAL;
350 }
351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
352 pr_err("Passed name: %s exceeds "
353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
354 return -EINVAL;
355 }
356 if (!tfo->tpg_get_wwn) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
358 return -EINVAL;
359 }
360 if (!tfo->tpg_get_tag) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_check_demo_mode) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_check_demo_mode_cache) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_check_demo_mode_write_protect) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_check_prod_mode_write_protect) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_inst_index) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
382 return -EINVAL;
383 }
384 if (!tfo->release_cmd) {
385 pr_err("Missing tfo->release_cmd()\n");
386 return -EINVAL;
387 }
388 if (!tfo->sess_get_index) {
389 pr_err("Missing tfo->sess_get_index()\n");
390 return -EINVAL;
391 }
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
394 return -EINVAL;
395 }
396 if (!tfo->set_default_node_attributes) {
397 pr_err("Missing tfo->set_default_node_attributes()\n");
398 return -EINVAL;
399 }
400 if (!tfo->get_cmd_state) {
401 pr_err("Missing tfo->get_cmd_state()\n");
402 return -EINVAL;
403 }
404 if (!tfo->queue_data_in) {
405 pr_err("Missing tfo->queue_data_in()\n");
406 return -EINVAL;
407 }
408 if (!tfo->queue_status) {
409 pr_err("Missing tfo->queue_status()\n");
410 return -EINVAL;
411 }
412 if (!tfo->queue_tm_rsp) {
413 pr_err("Missing tfo->queue_tm_rsp()\n");
414 return -EINVAL;
415 }
416 if (!tfo->aborted_task) {
417 pr_err("Missing tfo->aborted_task()\n");
418 return -EINVAL;
419 }
420 if (!tfo->check_stop_free) {
421 pr_err("Missing tfo->check_stop_free()\n");
422 return -EINVAL;
423 }
424 /*
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
428 */
429 if (!tfo->fabric_make_wwn) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
431 return -EINVAL;
432 }
433 if (!tfo->fabric_drop_wwn) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
435 return -EINVAL;
436 }
437 if (!tfo->fabric_make_tpg) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fabric_drop_tpg) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
443 return -EINVAL;
444 }
445
446 return 0;
447}
448
449int target_register_template(const struct target_core_fabric_ops *fo)
450{
451 struct target_fabric_configfs *tf;
452 int ret;
453
454 ret = target_fabric_tf_ops_check(fo);
455 if (ret)
456 return ret;
457
458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
459 if (!tf) {
460 pr_err("%s: could not allocate memory!\n", __func__);
461 return -ENOMEM;
462 }
463
464 INIT_LIST_HEAD(&tf->tf_list);
465 atomic_set(&tf->tf_access_cnt, 0);
466 tf->tf_ops = fo;
467 target_fabric_setup_cits(tf);
468
469 mutex_lock(&g_tf_lock);
470 list_add_tail(&tf->tf_list, &g_tf_list);
471 mutex_unlock(&g_tf_lock);
472
473 return 0;
474}
475EXPORT_SYMBOL(target_register_template);
476
477void target_unregister_template(const struct target_core_fabric_ops *fo)
478{
479 struct target_fabric_configfs *t;
480
481 mutex_lock(&g_tf_lock);
482 list_for_each_entry(t, &g_tf_list, tf_list) {
483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
484 BUG_ON(atomic_read(&t->tf_access_cnt));
485 list_del(&t->tf_list);
486 mutex_unlock(&g_tf_lock);
487 /*
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
491 */
492 rcu_barrier();
493 kfree(t);
494 return;
495 }
496 }
497 mutex_unlock(&g_tf_lock);
498}
499EXPORT_SYMBOL(target_unregister_template);
500
501/*##############################################################################
502// Stop functions called by external Target Fabrics Modules
503//############################################################################*/
504
505static inline struct se_dev_attrib *to_attrib(struct config_item *item)
506{
507 return container_of(to_config_group(item), struct se_dev_attrib,
508 da_group);
509}
510
511/* Start functions for struct config_item_type tb_dev_attrib_cit */
512#define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513static ssize_t _name##_show(struct config_item *item, char *page) \
514{ \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
516}
517
518DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
519DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
520DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
521DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
522DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
523DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
524DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
525DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
526DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
527DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
528DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
529DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
530DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
531DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
532DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
533DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
534DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
535DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
536DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
537DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
538DEF_CONFIGFS_ATTRIB_SHOW(block_size);
539DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
540DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
541DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
542DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
543DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
544DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
545DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
546DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
547DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
548DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
549
550#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
551static ssize_t _name##_store(struct config_item *item, const char *page,\
552 size_t count) \
553{ \
554 struct se_dev_attrib *da = to_attrib(item); \
555 u32 val; \
556 int ret; \
557 \
558 ret = kstrtou32(page, 0, &val); \
559 if (ret < 0) \
560 return ret; \
561 da->_name = val; \
562 return count; \
563}
564
565DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
566DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
567DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
568DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
569DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
570
571#define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
572static ssize_t _name##_store(struct config_item *item, const char *page, \
573 size_t count) \
574{ \
575 struct se_dev_attrib *da = to_attrib(item); \
576 bool flag; \
577 int ret; \
578 \
579 ret = strtobool(page, &flag); \
580 if (ret < 0) \
581 return ret; \
582 da->_name = flag; \
583 return count; \
584}
585
586DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
587DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
588DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
589DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
590DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
591DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
592
593#define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
594static ssize_t _name##_store(struct config_item *item, const char *page,\
595 size_t count) \
596{ \
597 printk_once(KERN_WARNING \
598 "ignoring deprecated %s attribute\n", \
599 __stringify(_name)); \
600 return count; \
601}
602
603DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
604DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
605
606static void dev_set_t10_wwn_model_alias(struct se_device *dev)
607{
608 const char *configname;
609
610 configname = config_item_name(&dev->dev_group.cg_item);
611 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
612 pr_warn("dev[%p]: Backstore name '%s' is too long for "
613 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
614 configname);
615 }
616 /*
617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
618 * here without potentially breaking existing setups, so continue to
619 * truncate one byte shorter than what can be carried in INQUIRY.
620 */
621 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
622}
623
624static ssize_t emulate_model_alias_store(struct config_item *item,
625 const char *page, size_t count)
626{
627 struct se_dev_attrib *da = to_attrib(item);
628 struct se_device *dev = da->da_dev;
629 bool flag;
630 int ret;
631
632 if (dev->export_count) {
633 pr_err("dev[%p]: Unable to change model alias"
634 " while export_count is %d\n",
635 dev, dev->export_count);
636 return -EINVAL;
637 }
638
639 ret = strtobool(page, &flag);
640 if (ret < 0)
641 return ret;
642
643 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
644 if (flag) {
645 dev_set_t10_wwn_model_alias(dev);
646 } else {
647 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
648 sizeof(dev->t10_wwn.model));
649 }
650 da->emulate_model_alias = flag;
651 return count;
652}
653
654static ssize_t emulate_write_cache_store(struct config_item *item,
655 const char *page, size_t count)
656{
657 struct se_dev_attrib *da = to_attrib(item);
658 bool flag;
659 int ret;
660
661 ret = strtobool(page, &flag);
662 if (ret < 0)
663 return ret;
664
665 if (flag && da->da_dev->transport->get_write_cache) {
666 pr_err("emulate_write_cache not supported for this device\n");
667 return -EINVAL;
668 }
669
670 da->emulate_write_cache = flag;
671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
672 da->da_dev, flag);
673 return count;
674}
675
676static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
677 const char *page, size_t count)
678{
679 struct se_dev_attrib *da = to_attrib(item);
680 u32 val;
681 int ret;
682
683 ret = kstrtou32(page, 0, &val);
684 if (ret < 0)
685 return ret;
686
687 if (val != 0 && val != 1 && val != 2) {
688 pr_err("Illegal value %d\n", val);
689 return -EINVAL;
690 }
691
692 if (da->da_dev->export_count) {
693 pr_err("dev[%p]: Unable to change SE Device"
694 " UA_INTRLCK_CTRL while export_count is %d\n",
695 da->da_dev, da->da_dev->export_count);
696 return -EINVAL;
697 }
698 da->emulate_ua_intlck_ctrl = val;
699 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
700 da->da_dev, val);
701 return count;
702}
703
704static ssize_t emulate_tas_store(struct config_item *item,
705 const char *page, size_t count)
706{
707 struct se_dev_attrib *da = to_attrib(item);
708 bool flag;
709 int ret;
710
711 ret = strtobool(page, &flag);
712 if (ret < 0)
713 return ret;
714
715 if (da->da_dev->export_count) {
716 pr_err("dev[%p]: Unable to change SE Device TAS while"
717 " export_count is %d\n",
718 da->da_dev, da->da_dev->export_count);
719 return -EINVAL;
720 }
721 da->emulate_tas = flag;
722 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
723 da->da_dev, flag ? "Enabled" : "Disabled");
724
725 return count;
726}
727
728static ssize_t emulate_tpu_store(struct config_item *item,
729 const char *page, size_t count)
730{
731 struct se_dev_attrib *da = to_attrib(item);
732 bool flag;
733 int ret;
734
735 ret = strtobool(page, &flag);
736 if (ret < 0)
737 return ret;
738
739 /*
740 * We expect this value to be non-zero when generic Block Layer
741 * Discard supported is detected iblock_create_virtdevice().
742 */
743 if (flag && !da->max_unmap_block_desc_count) {
744 pr_err("Generic Block Discard not supported\n");
745 return -ENOSYS;
746 }
747
748 da->emulate_tpu = flag;
749 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
750 da->da_dev, flag);
751 return count;
752}
753
754static ssize_t emulate_tpws_store(struct config_item *item,
755 const char *page, size_t count)
756{
757 struct se_dev_attrib *da = to_attrib(item);
758 bool flag;
759 int ret;
760
761 ret = strtobool(page, &flag);
762 if (ret < 0)
763 return ret;
764
765 /*
766 * We expect this value to be non-zero when generic Block Layer
767 * Discard supported is detected iblock_create_virtdevice().
768 */
769 if (flag && !da->max_unmap_block_desc_count) {
770 pr_err("Generic Block Discard not supported\n");
771 return -ENOSYS;
772 }
773
774 da->emulate_tpws = flag;
775 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
776 da->da_dev, flag);
777 return count;
778}
779
780static ssize_t pi_prot_type_store(struct config_item *item,
781 const char *page, size_t count)
782{
783 struct se_dev_attrib *da = to_attrib(item);
784 int old_prot = da->pi_prot_type, ret;
785 struct se_device *dev = da->da_dev;
786 u32 flag;
787
788 ret = kstrtou32(page, 0, &flag);
789 if (ret < 0)
790 return ret;
791
792 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
793 pr_err("Illegal value %d for pi_prot_type\n", flag);
794 return -EINVAL;
795 }
796 if (flag == 2) {
797 pr_err("DIF TYPE2 protection currently not supported\n");
798 return -ENOSYS;
799 }
800 if (da->hw_pi_prot_type) {
801 pr_warn("DIF protection enabled on underlying hardware,"
802 " ignoring\n");
803 return count;
804 }
805 if (!dev->transport->init_prot || !dev->transport->free_prot) {
806 /* 0 is only allowed value for non-supporting backends */
807 if (flag == 0)
808 return count;
809
810 pr_err("DIF protection not supported by backend: %s\n",
811 dev->transport->name);
812 return -ENOSYS;
813 }
814 if (!target_dev_configured(dev)) {
815 pr_err("DIF protection requires device to be configured\n");
816 return -ENODEV;
817 }
818 if (dev->export_count) {
819 pr_err("dev[%p]: Unable to change SE Device PROT type while"
820 " export_count is %d\n", dev, dev->export_count);
821 return -EINVAL;
822 }
823
824 da->pi_prot_type = flag;
825
826 if (flag && !old_prot) {
827 ret = dev->transport->init_prot(dev);
828 if (ret) {
829 da->pi_prot_type = old_prot;
830 da->pi_prot_verify = (bool) da->pi_prot_type;
831 return ret;
832 }
833
834 } else if (!flag && old_prot) {
835 dev->transport->free_prot(dev);
836 }
837
838 da->pi_prot_verify = (bool) da->pi_prot_type;
839 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
840 return count;
841}
842
843/* always zero, but attr needs to remain RW to avoid userspace breakage */
844static ssize_t pi_prot_format_show(struct config_item *item, char *page)
845{
846 return snprintf(page, PAGE_SIZE, "0\n");
847}
848
849static ssize_t pi_prot_format_store(struct config_item *item,
850 const char *page, size_t count)
851{
852 struct se_dev_attrib *da = to_attrib(item);
853 struct se_device *dev = da->da_dev;
854 bool flag;
855 int ret;
856
857 ret = strtobool(page, &flag);
858 if (ret < 0)
859 return ret;
860
861 if (!flag)
862 return count;
863
864 if (!dev->transport->format_prot) {
865 pr_err("DIF protection format not supported by backend %s\n",
866 dev->transport->name);
867 return -ENOSYS;
868 }
869 if (!target_dev_configured(dev)) {
870 pr_err("DIF protection format requires device to be configured\n");
871 return -ENODEV;
872 }
873 if (dev->export_count) {
874 pr_err("dev[%p]: Unable to format SE Device PROT type while"
875 " export_count is %d\n", dev, dev->export_count);
876 return -EINVAL;
877 }
878
879 ret = dev->transport->format_prot(dev);
880 if (ret)
881 return ret;
882
883 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
884 return count;
885}
886
887static ssize_t pi_prot_verify_store(struct config_item *item,
888 const char *page, size_t count)
889{
890 struct se_dev_attrib *da = to_attrib(item);
891 bool flag;
892 int ret;
893
894 ret = strtobool(page, &flag);
895 if (ret < 0)
896 return ret;
897
898 if (!flag) {
899 da->pi_prot_verify = flag;
900 return count;
901 }
902 if (da->hw_pi_prot_type) {
903 pr_warn("DIF protection enabled on underlying hardware,"
904 " ignoring\n");
905 return count;
906 }
907 if (!da->pi_prot_type) {
908 pr_warn("DIF protection not supported by backend, ignoring\n");
909 return count;
910 }
911 da->pi_prot_verify = flag;
912
913 return count;
914}
915
916static ssize_t force_pr_aptpl_store(struct config_item *item,
917 const char *page, size_t count)
918{
919 struct se_dev_attrib *da = to_attrib(item);
920 bool flag;
921 int ret;
922
923 ret = strtobool(page, &flag);
924 if (ret < 0)
925 return ret;
926 if (da->da_dev->export_count) {
927 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
928 " export_count is %d\n",
929 da->da_dev, da->da_dev->export_count);
930 return -EINVAL;
931 }
932
933 da->force_pr_aptpl = flag;
934 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
935 return count;
936}
937
938static ssize_t emulate_rest_reord_store(struct config_item *item,
939 const char *page, size_t count)
940{
941 struct se_dev_attrib *da = to_attrib(item);
942 bool flag;
943 int ret;
944
945 ret = strtobool(page, &flag);
946 if (ret < 0)
947 return ret;
948
949 if (flag != 0) {
950 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
951 " reordering not implemented\n", da->da_dev);
952 return -ENOSYS;
953 }
954 da->emulate_rest_reord = flag;
955 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
956 da->da_dev, flag);
957 return count;
958}
959
960static ssize_t unmap_zeroes_data_store(struct config_item *item,
961 const char *page, size_t count)
962{
963 struct se_dev_attrib *da = to_attrib(item);
964 bool flag;
965 int ret;
966
967 ret = strtobool(page, &flag);
968 if (ret < 0)
969 return ret;
970
971 if (da->da_dev->export_count) {
972 pr_err("dev[%p]: Unable to change SE Device"
973 " unmap_zeroes_data while export_count is %d\n",
974 da->da_dev, da->da_dev->export_count);
975 return -EINVAL;
976 }
977 /*
978 * We expect this value to be non-zero when generic Block Layer
979 * Discard supported is detected iblock_configure_device().
980 */
981 if (flag && !da->max_unmap_block_desc_count) {
982 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
983 " because max_unmap_block_desc_count is zero\n",
984 da->da_dev);
985 return -ENOSYS;
986 }
987 da->unmap_zeroes_data = flag;
988 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
989 da->da_dev, flag);
990 return count;
991}
992
993/*
994 * Note, this can only be called on unexported SE Device Object.
995 */
996static ssize_t queue_depth_store(struct config_item *item,
997 const char *page, size_t count)
998{
999 struct se_dev_attrib *da = to_attrib(item);
1000 struct se_device *dev = da->da_dev;
1001 u32 val;
1002 int ret;
1003
1004 ret = kstrtou32(page, 0, &val);
1005 if (ret < 0)
1006 return ret;
1007
1008 if (dev->export_count) {
1009 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1010 " export_count is %d\n",
1011 dev, dev->export_count);
1012 return -EINVAL;
1013 }
1014 if (!val) {
1015 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1016 return -EINVAL;
1017 }
1018
1019 if (val > dev->dev_attrib.queue_depth) {
1020 if (val > dev->dev_attrib.hw_queue_depth) {
1021 pr_err("dev[%p]: Passed queue_depth:"
1022 " %u exceeds TCM/SE_Device MAX"
1023 " TCQ: %u\n", dev, val,
1024 dev->dev_attrib.hw_queue_depth);
1025 return -EINVAL;
1026 }
1027 }
1028 da->queue_depth = dev->queue_depth = val;
1029 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1030 return count;
1031}
1032
1033static ssize_t optimal_sectors_store(struct config_item *item,
1034 const char *page, size_t count)
1035{
1036 struct se_dev_attrib *da = to_attrib(item);
1037 u32 val;
1038 int ret;
1039
1040 ret = kstrtou32(page, 0, &val);
1041 if (ret < 0)
1042 return ret;
1043
1044 if (da->da_dev->export_count) {
1045 pr_err("dev[%p]: Unable to change SE Device"
1046 " optimal_sectors while export_count is %d\n",
1047 da->da_dev, da->da_dev->export_count);
1048 return -EINVAL;
1049 }
1050 if (val > da->hw_max_sectors) {
1051 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1052 " greater than hw_max_sectors: %u\n",
1053 da->da_dev, val, da->hw_max_sectors);
1054 return -EINVAL;
1055 }
1056
1057 da->optimal_sectors = val;
1058 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1059 da->da_dev, val);
1060 return count;
1061}
1062
1063static ssize_t block_size_store(struct config_item *item,
1064 const char *page, size_t count)
1065{
1066 struct se_dev_attrib *da = to_attrib(item);
1067 u32 val;
1068 int ret;
1069
1070 ret = kstrtou32(page, 0, &val);
1071 if (ret < 0)
1072 return ret;
1073
1074 if (da->da_dev->export_count) {
1075 pr_err("dev[%p]: Unable to change SE Device block_size"
1076 " while export_count is %d\n",
1077 da->da_dev, da->da_dev->export_count);
1078 return -EINVAL;
1079 }
1080
1081 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1082 pr_err("dev[%p]: Illegal value for block_device: %u"
1083 " for SE device, must be 512, 1024, 2048 or 4096\n",
1084 da->da_dev, val);
1085 return -EINVAL;
1086 }
1087
1088 da->block_size = val;
1089 if (da->max_bytes_per_io)
1090 da->hw_max_sectors = da->max_bytes_per_io / val;
1091
1092 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1093 da->da_dev, val);
1094 return count;
1095}
1096
1097static ssize_t alua_support_show(struct config_item *item, char *page)
1098{
1099 struct se_dev_attrib *da = to_attrib(item);
1100 u8 flags = da->da_dev->transport->transport_flags;
1101
1102 return snprintf(page, PAGE_SIZE, "%d\n",
1103 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1104}
1105
1106static ssize_t pgr_support_show(struct config_item *item, char *page)
1107{
1108 struct se_dev_attrib *da = to_attrib(item);
1109 u8 flags = da->da_dev->transport->transport_flags;
1110
1111 return snprintf(page, PAGE_SIZE, "%d\n",
1112 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1113}
1114
1115CONFIGFS_ATTR(, emulate_model_alias);
1116CONFIGFS_ATTR(, emulate_dpo);
1117CONFIGFS_ATTR(, emulate_fua_write);
1118CONFIGFS_ATTR(, emulate_fua_read);
1119CONFIGFS_ATTR(, emulate_write_cache);
1120CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1121CONFIGFS_ATTR(, emulate_tas);
1122CONFIGFS_ATTR(, emulate_tpu);
1123CONFIGFS_ATTR(, emulate_tpws);
1124CONFIGFS_ATTR(, emulate_caw);
1125CONFIGFS_ATTR(, emulate_3pc);
1126CONFIGFS_ATTR(, emulate_pr);
1127CONFIGFS_ATTR(, pi_prot_type);
1128CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1129CONFIGFS_ATTR(, pi_prot_format);
1130CONFIGFS_ATTR(, pi_prot_verify);
1131CONFIGFS_ATTR(, enforce_pr_isids);
1132CONFIGFS_ATTR(, is_nonrot);
1133CONFIGFS_ATTR(, emulate_rest_reord);
1134CONFIGFS_ATTR(, force_pr_aptpl);
1135CONFIGFS_ATTR_RO(, hw_block_size);
1136CONFIGFS_ATTR(, block_size);
1137CONFIGFS_ATTR_RO(, hw_max_sectors);
1138CONFIGFS_ATTR(, optimal_sectors);
1139CONFIGFS_ATTR_RO(, hw_queue_depth);
1140CONFIGFS_ATTR(, queue_depth);
1141CONFIGFS_ATTR(, max_unmap_lba_count);
1142CONFIGFS_ATTR(, max_unmap_block_desc_count);
1143CONFIGFS_ATTR(, unmap_granularity);
1144CONFIGFS_ATTR(, unmap_granularity_alignment);
1145CONFIGFS_ATTR(, unmap_zeroes_data);
1146CONFIGFS_ATTR(, max_write_same_len);
1147CONFIGFS_ATTR_RO(, alua_support);
1148CONFIGFS_ATTR_RO(, pgr_support);
1149
1150/*
1151 * dev_attrib attributes for devices using the target core SBC/SPC
1152 * interpreter. Any backend using spc_parse_cdb should be using
1153 * these.
1154 */
1155struct configfs_attribute *sbc_attrib_attrs[] = {
1156 &attr_emulate_model_alias,
1157 &attr_emulate_dpo,
1158 &attr_emulate_fua_write,
1159 &attr_emulate_fua_read,
1160 &attr_emulate_write_cache,
1161 &attr_emulate_ua_intlck_ctrl,
1162 &attr_emulate_tas,
1163 &attr_emulate_tpu,
1164 &attr_emulate_tpws,
1165 &attr_emulate_caw,
1166 &attr_emulate_3pc,
1167 &attr_emulate_pr,
1168 &attr_pi_prot_type,
1169 &attr_hw_pi_prot_type,
1170 &attr_pi_prot_format,
1171 &attr_pi_prot_verify,
1172 &attr_enforce_pr_isids,
1173 &attr_is_nonrot,
1174 &attr_emulate_rest_reord,
1175 &attr_force_pr_aptpl,
1176 &attr_hw_block_size,
1177 &attr_block_size,
1178 &attr_hw_max_sectors,
1179 &attr_optimal_sectors,
1180 &attr_hw_queue_depth,
1181 &attr_queue_depth,
1182 &attr_max_unmap_lba_count,
1183 &attr_max_unmap_block_desc_count,
1184 &attr_unmap_granularity,
1185 &attr_unmap_granularity_alignment,
1186 &attr_unmap_zeroes_data,
1187 &attr_max_write_same_len,
1188 &attr_alua_support,
1189 &attr_pgr_support,
1190 NULL,
1191};
1192EXPORT_SYMBOL(sbc_attrib_attrs);
1193
1194/*
1195 * Minimal dev_attrib attributes for devices passing through CDBs.
1196 * In this case we only provide a few read-only attributes for
1197 * backwards compatibility.
1198 */
1199struct configfs_attribute *passthrough_attrib_attrs[] = {
1200 &attr_hw_pi_prot_type,
1201 &attr_hw_block_size,
1202 &attr_hw_max_sectors,
1203 &attr_hw_queue_depth,
1204 &attr_alua_support,
1205 &attr_pgr_support,
1206 NULL,
1207};
1208EXPORT_SYMBOL(passthrough_attrib_attrs);
1209
1210TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1211TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1212
1213/* End functions for struct config_item_type tb_dev_attrib_cit */
1214
1215/* Start functions for struct config_item_type tb_dev_wwn_cit */
1216
1217static struct t10_wwn *to_t10_wwn(struct config_item *item)
1218{
1219 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1220}
1221
1222static ssize_t target_check_inquiry_data(char *buf)
1223{
1224 size_t len;
1225 int i;
1226
1227 len = strlen(buf);
1228
1229 /*
1230 * SPC 4.3.1:
1231 * ASCII data fields shall contain only ASCII printable characters
1232 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1233 * more ASCII null (00h) characters.
1234 */
1235 for (i = 0; i < len; i++) {
1236 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1237 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1238 return -EINVAL;
1239 }
1240 }
1241
1242 return len;
1243}
1244
1245/*
1246 * STANDARD and VPD page 0x83 T10 Vendor Identification
1247 */
1248static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1249 char *page)
1250{
1251 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1252}
1253
1254static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1255 const char *page, size_t count)
1256{
1257 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1258 struct se_device *dev = t10_wwn->t10_dev;
1259 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1260 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1261 char *stripped = NULL;
1262 size_t len;
1263 ssize_t ret;
1264
1265 len = strlcpy(buf, page, sizeof(buf));
1266 if (len < sizeof(buf)) {
1267 /* Strip any newline added from userspace. */
1268 stripped = strstrip(buf);
1269 len = strlen(stripped);
1270 }
1271 if (len > INQUIRY_VENDOR_LEN) {
1272 pr_err("Emulated T10 Vendor Identification exceeds"
1273 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1274 "\n");
1275 return -EOVERFLOW;
1276 }
1277
1278 ret = target_check_inquiry_data(stripped);
1279
1280 if (ret < 0)
1281 return ret;
1282
1283 /*
1284 * Check to see if any active exports exist. If they do exist, fail
1285 * here as changing this information on the fly (underneath the
1286 * initiator side OS dependent multipath code) could cause negative
1287 * effects.
1288 */
1289 if (dev->export_count) {
1290 pr_err("Unable to set T10 Vendor Identification while"
1291 " active %d exports exist\n", dev->export_count);
1292 return -EINVAL;
1293 }
1294
1295 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1296 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1297
1298 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1299 " %s\n", dev->t10_wwn.vendor);
1300
1301 return count;
1302}
1303
1304static ssize_t target_wwn_product_id_show(struct config_item *item,
1305 char *page)
1306{
1307 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1308}
1309
1310static ssize_t target_wwn_product_id_store(struct config_item *item,
1311 const char *page, size_t count)
1312{
1313 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1314 struct se_device *dev = t10_wwn->t10_dev;
1315 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1316 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1317 char *stripped = NULL;
1318 size_t len;
1319 ssize_t ret;
1320
1321 len = strlcpy(buf, page, sizeof(buf));
1322 if (len < sizeof(buf)) {
1323 /* Strip any newline added from userspace. */
1324 stripped = strstrip(buf);
1325 len = strlen(stripped);
1326 }
1327 if (len > INQUIRY_MODEL_LEN) {
1328 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1329 __stringify(INQUIRY_MODEL_LEN)
1330 "\n");
1331 return -EOVERFLOW;
1332 }
1333
1334 ret = target_check_inquiry_data(stripped);
1335
1336 if (ret < 0)
1337 return ret;
1338
1339 /*
1340 * Check to see if any active exports exist. If they do exist, fail
1341 * here as changing this information on the fly (underneath the
1342 * initiator side OS dependent multipath code) could cause negative
1343 * effects.
1344 */
1345 if (dev->export_count) {
1346 pr_err("Unable to set T10 Model while active %d exports exist\n",
1347 dev->export_count);
1348 return -EINVAL;
1349 }
1350
1351 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1352 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1353
1354 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1355 dev->t10_wwn.model);
1356
1357 return count;
1358}
1359
1360static ssize_t target_wwn_revision_show(struct config_item *item,
1361 char *page)
1362{
1363 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1364}
1365
1366static ssize_t target_wwn_revision_store(struct config_item *item,
1367 const char *page, size_t count)
1368{
1369 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1370 struct se_device *dev = t10_wwn->t10_dev;
1371 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1372 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1373 char *stripped = NULL;
1374 size_t len;
1375 ssize_t ret;
1376
1377 len = strlcpy(buf, page, sizeof(buf));
1378 if (len < sizeof(buf)) {
1379 /* Strip any newline added from userspace. */
1380 stripped = strstrip(buf);
1381 len = strlen(stripped);
1382 }
1383 if (len > INQUIRY_REVISION_LEN) {
1384 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1385 __stringify(INQUIRY_REVISION_LEN)
1386 "\n");
1387 return -EOVERFLOW;
1388 }
1389
1390 ret = target_check_inquiry_data(stripped);
1391
1392 if (ret < 0)
1393 return ret;
1394
1395 /*
1396 * Check to see if any active exports exist. If they do exist, fail
1397 * here as changing this information on the fly (underneath the
1398 * initiator side OS dependent multipath code) could cause negative
1399 * effects.
1400 */
1401 if (dev->export_count) {
1402 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1403 dev->export_count);
1404 return -EINVAL;
1405 }
1406
1407 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1408 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1409
1410 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1411 dev->t10_wwn.revision);
1412
1413 return count;
1414}
1415
1416/*
1417 * VPD page 0x80 Unit serial
1418 */
1419static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1420 char *page)
1421{
1422 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1423 &to_t10_wwn(item)->unit_serial[0]);
1424}
1425
1426static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1427 const char *page, size_t count)
1428{
1429 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1430 struct se_device *dev = t10_wwn->t10_dev;
1431 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1432
1433 /*
1434 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1435 * from the struct scsi_device level firmware, do not allow
1436 * VPD Unit Serial to be emulated.
1437 *
1438 * Note this struct scsi_device could also be emulating VPD
1439 * information from its drivers/scsi LLD. But for now we assume
1440 * it is doing 'the right thing' wrt a world wide unique
1441 * VPD Unit Serial Number that OS dependent multipath can depend on.
1442 */
1443 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1444 pr_err("Underlying SCSI device firmware provided VPD"
1445 " Unit Serial, ignoring request\n");
1446 return -EOPNOTSUPP;
1447 }
1448
1449 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1450 pr_err("Emulated VPD Unit Serial exceeds"
1451 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1452 return -EOVERFLOW;
1453 }
1454 /*
1455 * Check to see if any active $FABRIC_MOD exports exist. If they
1456 * do exist, fail here as changing this information on the fly
1457 * (underneath the initiator side OS dependent multipath code)
1458 * could cause negative effects.
1459 */
1460 if (dev->export_count) {
1461 pr_err("Unable to set VPD Unit Serial while"
1462 " active %d $FABRIC_MOD exports exist\n",
1463 dev->export_count);
1464 return -EINVAL;
1465 }
1466
1467 /*
1468 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1469 *
1470 * Also, strip any newline added from the userspace
1471 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1472 */
1473 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1474 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1475 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1476 "%s", strstrip(buf));
1477 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1478
1479 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1480 " %s\n", dev->t10_wwn.unit_serial);
1481
1482 return count;
1483}
1484
1485/*
1486 * VPD page 0x83 Protocol Identifier
1487 */
1488static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1489 char *page)
1490{
1491 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1492 struct t10_vpd *vpd;
1493 unsigned char buf[VPD_TMP_BUF_SIZE];
1494 ssize_t len = 0;
1495
1496 memset(buf, 0, VPD_TMP_BUF_SIZE);
1497
1498 spin_lock(&t10_wwn->t10_vpd_lock);
1499 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1500 if (!vpd->protocol_identifier_set)
1501 continue;
1502
1503 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1504
1505 if (len + strlen(buf) >= PAGE_SIZE)
1506 break;
1507
1508 len += sprintf(page+len, "%s", buf);
1509 }
1510 spin_unlock(&t10_wwn->t10_vpd_lock);
1511
1512 return len;
1513}
1514
1515/*
1516 * Generic wrapper for dumping VPD identifiers by association.
1517 */
1518#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1519static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1520 char *page) \
1521{ \
1522 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1523 struct t10_vpd *vpd; \
1524 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1525 ssize_t len = 0; \
1526 \
1527 spin_lock(&t10_wwn->t10_vpd_lock); \
1528 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1529 if (vpd->association != _assoc) \
1530 continue; \
1531 \
1532 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1533 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1534 if (len + strlen(buf) >= PAGE_SIZE) \
1535 break; \
1536 len += sprintf(page+len, "%s", buf); \
1537 \
1538 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1539 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1540 if (len + strlen(buf) >= PAGE_SIZE) \
1541 break; \
1542 len += sprintf(page+len, "%s", buf); \
1543 \
1544 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1545 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1546 if (len + strlen(buf) >= PAGE_SIZE) \
1547 break; \
1548 len += sprintf(page+len, "%s", buf); \
1549 } \
1550 spin_unlock(&t10_wwn->t10_vpd_lock); \
1551 \
1552 return len; \
1553}
1554
1555/* VPD page 0x83 Association: Logical Unit */
1556DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1557/* VPD page 0x83 Association: Target Port */
1558DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1559/* VPD page 0x83 Association: SCSI Target Device */
1560DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1561
1562CONFIGFS_ATTR(target_wwn_, vendor_id);
1563CONFIGFS_ATTR(target_wwn_, product_id);
1564CONFIGFS_ATTR(target_wwn_, revision);
1565CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1566CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1567CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1568CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1569CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1570
1571static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1572 &target_wwn_attr_vendor_id,
1573 &target_wwn_attr_product_id,
1574 &target_wwn_attr_revision,
1575 &target_wwn_attr_vpd_unit_serial,
1576 &target_wwn_attr_vpd_protocol_identifier,
1577 &target_wwn_attr_vpd_assoc_logical_unit,
1578 &target_wwn_attr_vpd_assoc_target_port,
1579 &target_wwn_attr_vpd_assoc_scsi_target_device,
1580 NULL,
1581};
1582
1583TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1584
1585/* End functions for struct config_item_type tb_dev_wwn_cit */
1586
1587/* Start functions for struct config_item_type tb_dev_pr_cit */
1588
1589static struct se_device *pr_to_dev(struct config_item *item)
1590{
1591 return container_of(to_config_group(item), struct se_device,
1592 dev_pr_group);
1593}
1594
1595static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1596 char *page)
1597{
1598 struct se_node_acl *se_nacl;
1599 struct t10_pr_registration *pr_reg;
1600 char i_buf[PR_REG_ISID_ID_LEN];
1601
1602 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1603
1604 pr_reg = dev->dev_pr_res_holder;
1605 if (!pr_reg)
1606 return sprintf(page, "No SPC-3 Reservation holder\n");
1607
1608 se_nacl = pr_reg->pr_reg_nacl;
1609 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1610
1611 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1612 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1613 se_nacl->initiatorname, i_buf);
1614}
1615
1616static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1617 char *page)
1618{
1619 struct se_session *sess = dev->reservation_holder;
1620 struct se_node_acl *se_nacl;
1621 ssize_t len;
1622
1623 if (sess) {
1624 se_nacl = sess->se_node_acl;
1625 len = sprintf(page,
1626 "SPC-2 Reservation: %s Initiator: %s\n",
1627 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1628 se_nacl->initiatorname);
1629 } else {
1630 len = sprintf(page, "No SPC-2 Reservation holder\n");
1631 }
1632 return len;
1633}
1634
1635static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1636{
1637 struct se_device *dev = pr_to_dev(item);
1638 int ret;
1639
1640 if (!dev->dev_attrib.emulate_pr)
1641 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1642
1643 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1644 return sprintf(page, "Passthrough\n");
1645
1646 spin_lock(&dev->dev_reservation_lock);
1647 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1648 ret = target_core_dev_pr_show_spc2_res(dev, page);
1649 else
1650 ret = target_core_dev_pr_show_spc3_res(dev, page);
1651 spin_unlock(&dev->dev_reservation_lock);
1652 return ret;
1653}
1654
1655static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1656 char *page)
1657{
1658 struct se_device *dev = pr_to_dev(item);
1659 ssize_t len = 0;
1660
1661 spin_lock(&dev->dev_reservation_lock);
1662 if (!dev->dev_pr_res_holder) {
1663 len = sprintf(page, "No SPC-3 Reservation holder\n");
1664 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1665 len = sprintf(page, "SPC-3 Reservation: All Target"
1666 " Ports registration\n");
1667 } else {
1668 len = sprintf(page, "SPC-3 Reservation: Single"
1669 " Target Port registration\n");
1670 }
1671
1672 spin_unlock(&dev->dev_reservation_lock);
1673 return len;
1674}
1675
1676static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1677 char *page)
1678{
1679 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1680}
1681
1682
1683static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1684 char *page)
1685{
1686 struct se_device *dev = pr_to_dev(item);
1687 struct se_node_acl *se_nacl;
1688 struct se_portal_group *se_tpg;
1689 struct t10_pr_registration *pr_reg;
1690 const struct target_core_fabric_ops *tfo;
1691 ssize_t len = 0;
1692
1693 spin_lock(&dev->dev_reservation_lock);
1694 pr_reg = dev->dev_pr_res_holder;
1695 if (!pr_reg) {
1696 len = sprintf(page, "No SPC-3 Reservation holder\n");
1697 goto out_unlock;
1698 }
1699
1700 se_nacl = pr_reg->pr_reg_nacl;
1701 se_tpg = se_nacl->se_tpg;
1702 tfo = se_tpg->se_tpg_tfo;
1703
1704 len += sprintf(page+len, "SPC-3 Reservation: %s"
1705 " Target Node Endpoint: %s\n", tfo->fabric_name,
1706 tfo->tpg_get_wwn(se_tpg));
1707 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1708 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1709 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1710 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1711 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1712
1713out_unlock:
1714 spin_unlock(&dev->dev_reservation_lock);
1715 return len;
1716}
1717
1718
1719static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1720 char *page)
1721{
1722 struct se_device *dev = pr_to_dev(item);
1723 const struct target_core_fabric_ops *tfo;
1724 struct t10_pr_registration *pr_reg;
1725 unsigned char buf[384];
1726 char i_buf[PR_REG_ISID_ID_LEN];
1727 ssize_t len = 0;
1728 int reg_count = 0;
1729
1730 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1731
1732 spin_lock(&dev->t10_pr.registration_lock);
1733 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1734 pr_reg_list) {
1735
1736 memset(buf, 0, 384);
1737 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1738 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1739 core_pr_dump_initiator_port(pr_reg, i_buf,
1740 PR_REG_ISID_ID_LEN);
1741 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1742 tfo->fabric_name,
1743 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1744 pr_reg->pr_res_generation);
1745
1746 if (len + strlen(buf) >= PAGE_SIZE)
1747 break;
1748
1749 len += sprintf(page+len, "%s", buf);
1750 reg_count++;
1751 }
1752 spin_unlock(&dev->t10_pr.registration_lock);
1753
1754 if (!reg_count)
1755 len += sprintf(page+len, "None\n");
1756
1757 return len;
1758}
1759
1760static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1761{
1762 struct se_device *dev = pr_to_dev(item);
1763 struct t10_pr_registration *pr_reg;
1764 ssize_t len = 0;
1765
1766 spin_lock(&dev->dev_reservation_lock);
1767 pr_reg = dev->dev_pr_res_holder;
1768 if (pr_reg) {
1769 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1770 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1771 } else {
1772 len = sprintf(page, "No SPC-3 Reservation holder\n");
1773 }
1774
1775 spin_unlock(&dev->dev_reservation_lock);
1776 return len;
1777}
1778
1779static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1780{
1781 struct se_device *dev = pr_to_dev(item);
1782
1783 if (!dev->dev_attrib.emulate_pr)
1784 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1785 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1786 return sprintf(page, "SPC_PASSTHROUGH\n");
1787 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1788 return sprintf(page, "SPC2_RESERVATIONS\n");
1789
1790 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1791}
1792
1793static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1794 char *page)
1795{
1796 struct se_device *dev = pr_to_dev(item);
1797
1798 if (!dev->dev_attrib.emulate_pr ||
1799 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1800 return 0;
1801
1802 return sprintf(page, "APTPL Bit Status: %s\n",
1803 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1804}
1805
1806static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1807 char *page)
1808{
1809 struct se_device *dev = pr_to_dev(item);
1810
1811 if (!dev->dev_attrib.emulate_pr ||
1812 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1813 return 0;
1814
1815 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1816}
1817
1818enum {
1819 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1820 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1821 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1822 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1823};
1824
1825static match_table_t tokens = {
1826 {Opt_initiator_fabric, "initiator_fabric=%s"},
1827 {Opt_initiator_node, "initiator_node=%s"},
1828 {Opt_initiator_sid, "initiator_sid=%s"},
1829 {Opt_sa_res_key, "sa_res_key=%s"},
1830 {Opt_res_holder, "res_holder=%d"},
1831 {Opt_res_type, "res_type=%d"},
1832 {Opt_res_scope, "res_scope=%d"},
1833 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1834 {Opt_mapped_lun, "mapped_lun=%u"},
1835 {Opt_target_fabric, "target_fabric=%s"},
1836 {Opt_target_node, "target_node=%s"},
1837 {Opt_tpgt, "tpgt=%d"},
1838 {Opt_port_rtpi, "port_rtpi=%d"},
1839 {Opt_target_lun, "target_lun=%u"},
1840 {Opt_err, NULL}
1841};
1842
1843static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1844 const char *page, size_t count)
1845{
1846 struct se_device *dev = pr_to_dev(item);
1847 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1848 unsigned char *t_fabric = NULL, *t_port = NULL;
1849 char *orig, *ptr, *opts;
1850 substring_t args[MAX_OPT_ARGS];
1851 unsigned long long tmp_ll;
1852 u64 sa_res_key = 0;
1853 u64 mapped_lun = 0, target_lun = 0;
1854 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1855 u16 tpgt = 0;
1856 u8 type = 0;
1857
1858 if (!dev->dev_attrib.emulate_pr ||
1859 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1860 return count;
1861 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1862 return count;
1863
1864 if (dev->export_count) {
1865 pr_debug("Unable to process APTPL metadata while"
1866 " active fabric exports exist\n");
1867 return -EINVAL;
1868 }
1869
1870 opts = kstrdup(page, GFP_KERNEL);
1871 if (!opts)
1872 return -ENOMEM;
1873
1874 orig = opts;
1875 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1876 if (!*ptr)
1877 continue;
1878
1879 token = match_token(ptr, tokens, args);
1880 switch (token) {
1881 case Opt_initiator_fabric:
1882 i_fabric = match_strdup(args);
1883 if (!i_fabric) {
1884 ret = -ENOMEM;
1885 goto out;
1886 }
1887 break;
1888 case Opt_initiator_node:
1889 i_port = match_strdup(args);
1890 if (!i_port) {
1891 ret = -ENOMEM;
1892 goto out;
1893 }
1894 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1895 pr_err("APTPL metadata initiator_node="
1896 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1897 PR_APTPL_MAX_IPORT_LEN);
1898 ret = -EINVAL;
1899 break;
1900 }
1901 break;
1902 case Opt_initiator_sid:
1903 isid = match_strdup(args);
1904 if (!isid) {
1905 ret = -ENOMEM;
1906 goto out;
1907 }
1908 if (strlen(isid) >= PR_REG_ISID_LEN) {
1909 pr_err("APTPL metadata initiator_isid"
1910 "= exceeds PR_REG_ISID_LEN: %d\n",
1911 PR_REG_ISID_LEN);
1912 ret = -EINVAL;
1913 break;
1914 }
1915 break;
1916 case Opt_sa_res_key:
1917 ret = match_u64(args, &tmp_ll);
1918 if (ret < 0) {
1919 pr_err("kstrtoull() failed for sa_res_key=\n");
1920 goto out;
1921 }
1922 sa_res_key = (u64)tmp_ll;
1923 break;
1924 /*
1925 * PR APTPL Metadata for Reservation
1926 */
1927 case Opt_res_holder:
1928 ret = match_int(args, &arg);
1929 if (ret)
1930 goto out;
1931 res_holder = arg;
1932 break;
1933 case Opt_res_type:
1934 ret = match_int(args, &arg);
1935 if (ret)
1936 goto out;
1937 type = (u8)arg;
1938 break;
1939 case Opt_res_scope:
1940 ret = match_int(args, &arg);
1941 if (ret)
1942 goto out;
1943 break;
1944 case Opt_res_all_tg_pt:
1945 ret = match_int(args, &arg);
1946 if (ret)
1947 goto out;
1948 all_tg_pt = (int)arg;
1949 break;
1950 case Opt_mapped_lun:
1951 ret = match_u64(args, &tmp_ll);
1952 if (ret)
1953 goto out;
1954 mapped_lun = (u64)tmp_ll;
1955 break;
1956 /*
1957 * PR APTPL Metadata for Target Port
1958 */
1959 case Opt_target_fabric:
1960 t_fabric = match_strdup(args);
1961 if (!t_fabric) {
1962 ret = -ENOMEM;
1963 goto out;
1964 }
1965 break;
1966 case Opt_target_node:
1967 t_port = match_strdup(args);
1968 if (!t_port) {
1969 ret = -ENOMEM;
1970 goto out;
1971 }
1972 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1973 pr_err("APTPL metadata target_node="
1974 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1975 PR_APTPL_MAX_TPORT_LEN);
1976 ret = -EINVAL;
1977 break;
1978 }
1979 break;
1980 case Opt_tpgt:
1981 ret = match_int(args, &arg);
1982 if (ret)
1983 goto out;
1984 tpgt = (u16)arg;
1985 break;
1986 case Opt_port_rtpi:
1987 ret = match_int(args, &arg);
1988 if (ret)
1989 goto out;
1990 break;
1991 case Opt_target_lun:
1992 ret = match_u64(args, &tmp_ll);
1993 if (ret)
1994 goto out;
1995 target_lun = (u64)tmp_ll;
1996 break;
1997 default:
1998 break;
1999 }
2000 }
2001
2002 if (!i_port || !t_port || !sa_res_key) {
2003 pr_err("Illegal parameters for APTPL registration\n");
2004 ret = -EINVAL;
2005 goto out;
2006 }
2007
2008 if (res_holder && !(type)) {
2009 pr_err("Illegal PR type: 0x%02x for reservation"
2010 " holder\n", type);
2011 ret = -EINVAL;
2012 goto out;
2013 }
2014
2015 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2016 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2017 res_holder, all_tg_pt, type);
2018out:
2019 kfree(i_fabric);
2020 kfree(i_port);
2021 kfree(isid);
2022 kfree(t_fabric);
2023 kfree(t_port);
2024 kfree(orig);
2025 return (ret == 0) ? count : ret;
2026}
2027
2028
2029CONFIGFS_ATTR_RO(target_pr_, res_holder);
2030CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2031CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2032CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2033CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2034CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2035CONFIGFS_ATTR_RO(target_pr_, res_type);
2036CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2037CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2038
2039static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2040 &target_pr_attr_res_holder,
2041 &target_pr_attr_res_pr_all_tgt_pts,
2042 &target_pr_attr_res_pr_generation,
2043 &target_pr_attr_res_pr_holder_tg_port,
2044 &target_pr_attr_res_pr_registered_i_pts,
2045 &target_pr_attr_res_pr_type,
2046 &target_pr_attr_res_type,
2047 &target_pr_attr_res_aptpl_active,
2048 &target_pr_attr_res_aptpl_metadata,
2049 NULL,
2050};
2051
2052TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2053
2054/* End functions for struct config_item_type tb_dev_pr_cit */
2055
2056/* Start functions for struct config_item_type tb_dev_cit */
2057
2058static inline struct se_device *to_device(struct config_item *item)
2059{
2060 return container_of(to_config_group(item), struct se_device, dev_group);
2061}
2062
2063static ssize_t target_dev_info_show(struct config_item *item, char *page)
2064{
2065 struct se_device *dev = to_device(item);
2066 int bl = 0;
2067 ssize_t read_bytes = 0;
2068
2069 transport_dump_dev_state(dev, page, &bl);
2070 read_bytes += bl;
2071 read_bytes += dev->transport->show_configfs_dev_params(dev,
2072 page+read_bytes);
2073 return read_bytes;
2074}
2075
2076static ssize_t target_dev_control_store(struct config_item *item,
2077 const char *page, size_t count)
2078{
2079 struct se_device *dev = to_device(item);
2080
2081 return dev->transport->set_configfs_dev_params(dev, page, count);
2082}
2083
2084static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2085{
2086 struct se_device *dev = to_device(item);
2087
2088 if (!(dev->dev_flags & DF_USING_ALIAS))
2089 return 0;
2090
2091 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2092}
2093
2094static ssize_t target_dev_alias_store(struct config_item *item,
2095 const char *page, size_t count)
2096{
2097 struct se_device *dev = to_device(item);
2098 struct se_hba *hba = dev->se_hba;
2099 ssize_t read_bytes;
2100
2101 if (count > (SE_DEV_ALIAS_LEN-1)) {
2102 pr_err("alias count: %d exceeds"
2103 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2104 SE_DEV_ALIAS_LEN-1);
2105 return -EINVAL;
2106 }
2107
2108 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2109 if (!read_bytes)
2110 return -EINVAL;
2111 if (dev->dev_alias[read_bytes - 1] == '\n')
2112 dev->dev_alias[read_bytes - 1] = '\0';
2113
2114 dev->dev_flags |= DF_USING_ALIAS;
2115
2116 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2117 config_item_name(&hba->hba_group.cg_item),
2118 config_item_name(&dev->dev_group.cg_item),
2119 dev->dev_alias);
2120
2121 return read_bytes;
2122}
2123
2124static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2125{
2126 struct se_device *dev = to_device(item);
2127
2128 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2129 return 0;
2130
2131 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2132}
2133
2134static ssize_t target_dev_udev_path_store(struct config_item *item,
2135 const char *page, size_t count)
2136{
2137 struct se_device *dev = to_device(item);
2138 struct se_hba *hba = dev->se_hba;
2139 ssize_t read_bytes;
2140
2141 if (count > (SE_UDEV_PATH_LEN-1)) {
2142 pr_err("udev_path count: %d exceeds"
2143 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2144 SE_UDEV_PATH_LEN-1);
2145 return -EINVAL;
2146 }
2147
2148 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2149 "%s", page);
2150 if (!read_bytes)
2151 return -EINVAL;
2152 if (dev->udev_path[read_bytes - 1] == '\n')
2153 dev->udev_path[read_bytes - 1] = '\0';
2154
2155 dev->dev_flags |= DF_USING_UDEV_PATH;
2156
2157 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2158 config_item_name(&hba->hba_group.cg_item),
2159 config_item_name(&dev->dev_group.cg_item),
2160 dev->udev_path);
2161
2162 return read_bytes;
2163}
2164
2165static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2166{
2167 struct se_device *dev = to_device(item);
2168
2169 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2170}
2171
2172static ssize_t target_dev_enable_store(struct config_item *item,
2173 const char *page, size_t count)
2174{
2175 struct se_device *dev = to_device(item);
2176 char *ptr;
2177 int ret;
2178
2179 ptr = strstr(page, "1");
2180 if (!ptr) {
2181 pr_err("For dev_enable ops, only valid value"
2182 " is \"1\"\n");
2183 return -EINVAL;
2184 }
2185
2186 ret = target_configure_device(dev);
2187 if (ret)
2188 return ret;
2189 return count;
2190}
2191
2192static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2193{
2194 struct se_device *dev = to_device(item);
2195 struct config_item *lu_ci;
2196 struct t10_alua_lu_gp *lu_gp;
2197 struct t10_alua_lu_gp_member *lu_gp_mem;
2198 ssize_t len = 0;
2199
2200 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2201 if (!lu_gp_mem)
2202 return 0;
2203
2204 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2205 lu_gp = lu_gp_mem->lu_gp;
2206 if (lu_gp) {
2207 lu_ci = &lu_gp->lu_gp_group.cg_item;
2208 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2209 config_item_name(lu_ci), lu_gp->lu_gp_id);
2210 }
2211 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2212
2213 return len;
2214}
2215
2216static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2217 const char *page, size_t count)
2218{
2219 struct se_device *dev = to_device(item);
2220 struct se_hba *hba = dev->se_hba;
2221 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2222 struct t10_alua_lu_gp_member *lu_gp_mem;
2223 unsigned char buf[LU_GROUP_NAME_BUF];
2224 int move = 0;
2225
2226 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2227 if (!lu_gp_mem)
2228 return count;
2229
2230 if (count > LU_GROUP_NAME_BUF) {
2231 pr_err("ALUA LU Group Alias too large!\n");
2232 return -EINVAL;
2233 }
2234 memset(buf, 0, LU_GROUP_NAME_BUF);
2235 memcpy(buf, page, count);
2236 /*
2237 * Any ALUA logical unit alias besides "NULL" means we will be
2238 * making a new group association.
2239 */
2240 if (strcmp(strstrip(buf), "NULL")) {
2241 /*
2242 * core_alua_get_lu_gp_by_name() will increment reference to
2243 * struct t10_alua_lu_gp. This reference is released with
2244 * core_alua_get_lu_gp_by_name below().
2245 */
2246 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2247 if (!lu_gp_new)
2248 return -ENODEV;
2249 }
2250
2251 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2252 lu_gp = lu_gp_mem->lu_gp;
2253 if (lu_gp) {
2254 /*
2255 * Clearing an existing lu_gp association, and replacing
2256 * with NULL
2257 */
2258 if (!lu_gp_new) {
2259 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2260 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2261 " %hu\n",
2262 config_item_name(&hba->hba_group.cg_item),
2263 config_item_name(&dev->dev_group.cg_item),
2264 config_item_name(&lu_gp->lu_gp_group.cg_item),
2265 lu_gp->lu_gp_id);
2266
2267 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2268 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2269
2270 return count;
2271 }
2272 /*
2273 * Removing existing association of lu_gp_mem with lu_gp
2274 */
2275 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2276 move = 1;
2277 }
2278 /*
2279 * Associate lu_gp_mem with lu_gp_new.
2280 */
2281 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2282 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2283
2284 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2285 " core/alua/lu_gps/%s, ID: %hu\n",
2286 (move) ? "Moving" : "Adding",
2287 config_item_name(&hba->hba_group.cg_item),
2288 config_item_name(&dev->dev_group.cg_item),
2289 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2290 lu_gp_new->lu_gp_id);
2291
2292 core_alua_put_lu_gp_from_name(lu_gp_new);
2293 return count;
2294}
2295
2296static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2297{
2298 struct se_device *dev = to_device(item);
2299 struct t10_alua_lba_map *map;
2300 struct t10_alua_lba_map_member *mem;
2301 char *b = page;
2302 int bl = 0;
2303 char state;
2304
2305 spin_lock(&dev->t10_alua.lba_map_lock);
2306 if (!list_empty(&dev->t10_alua.lba_map_list))
2307 bl += sprintf(b + bl, "%u %u\n",
2308 dev->t10_alua.lba_map_segment_size,
2309 dev->t10_alua.lba_map_segment_multiplier);
2310 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2311 bl += sprintf(b + bl, "%llu %llu",
2312 map->lba_map_first_lba, map->lba_map_last_lba);
2313 list_for_each_entry(mem, &map->lba_map_mem_list,
2314 lba_map_mem_list) {
2315 switch (mem->lba_map_mem_alua_state) {
2316 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2317 state = 'O';
2318 break;
2319 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2320 state = 'A';
2321 break;
2322 case ALUA_ACCESS_STATE_STANDBY:
2323 state = 'S';
2324 break;
2325 case ALUA_ACCESS_STATE_UNAVAILABLE:
2326 state = 'U';
2327 break;
2328 default:
2329 state = '.';
2330 break;
2331 }
2332 bl += sprintf(b + bl, " %d:%c",
2333 mem->lba_map_mem_alua_pg_id, state);
2334 }
2335 bl += sprintf(b + bl, "\n");
2336 }
2337 spin_unlock(&dev->t10_alua.lba_map_lock);
2338 return bl;
2339}
2340
2341static ssize_t target_dev_lba_map_store(struct config_item *item,
2342 const char *page, size_t count)
2343{
2344 struct se_device *dev = to_device(item);
2345 struct t10_alua_lba_map *lba_map = NULL;
2346 struct list_head lba_list;
2347 char *map_entries, *orig, *ptr;
2348 char state;
2349 int pg_num = -1, pg;
2350 int ret = 0, num = 0, pg_id, alua_state;
2351 unsigned long start_lba = -1, end_lba = -1;
2352 unsigned long segment_size = -1, segment_mult = -1;
2353
2354 orig = map_entries = kstrdup(page, GFP_KERNEL);
2355 if (!map_entries)
2356 return -ENOMEM;
2357
2358 INIT_LIST_HEAD(&lba_list);
2359 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2360 if (!*ptr)
2361 continue;
2362
2363 if (num == 0) {
2364 if (sscanf(ptr, "%lu %lu\n",
2365 &segment_size, &segment_mult) != 2) {
2366 pr_err("Invalid line %d\n", num);
2367 ret = -EINVAL;
2368 break;
2369 }
2370 num++;
2371 continue;
2372 }
2373 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2374 pr_err("Invalid line %d\n", num);
2375 ret = -EINVAL;
2376 break;
2377 }
2378 ptr = strchr(ptr, ' ');
2379 if (!ptr) {
2380 pr_err("Invalid line %d, missing end lba\n", num);
2381 ret = -EINVAL;
2382 break;
2383 }
2384 ptr++;
2385 ptr = strchr(ptr, ' ');
2386 if (!ptr) {
2387 pr_err("Invalid line %d, missing state definitions\n",
2388 num);
2389 ret = -EINVAL;
2390 break;
2391 }
2392 ptr++;
2393 lba_map = core_alua_allocate_lba_map(&lba_list,
2394 start_lba, end_lba);
2395 if (IS_ERR(lba_map)) {
2396 ret = PTR_ERR(lba_map);
2397 break;
2398 }
2399 pg = 0;
2400 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2401 switch (state) {
2402 case 'O':
2403 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2404 break;
2405 case 'A':
2406 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2407 break;
2408 case 'S':
2409 alua_state = ALUA_ACCESS_STATE_STANDBY;
2410 break;
2411 case 'U':
2412 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2413 break;
2414 default:
2415 pr_err("Invalid ALUA state '%c'\n", state);
2416 ret = -EINVAL;
2417 goto out;
2418 }
2419
2420 ret = core_alua_allocate_lba_map_mem(lba_map,
2421 pg_id, alua_state);
2422 if (ret) {
2423 pr_err("Invalid target descriptor %d:%c "
2424 "at line %d\n",
2425 pg_id, state, num);
2426 break;
2427 }
2428 pg++;
2429 ptr = strchr(ptr, ' ');
2430 if (ptr)
2431 ptr++;
2432 else
2433 break;
2434 }
2435 if (pg_num == -1)
2436 pg_num = pg;
2437 else if (pg != pg_num) {
2438 pr_err("Only %d from %d port groups definitions "
2439 "at line %d\n", pg, pg_num, num);
2440 ret = -EINVAL;
2441 break;
2442 }
2443 num++;
2444 }
2445out:
2446 if (ret) {
2447 core_alua_free_lba_map(&lba_list);
2448 count = ret;
2449 } else
2450 core_alua_set_lba_map(dev, &lba_list,
2451 segment_size, segment_mult);
2452 kfree(orig);
2453 return count;
2454}
2455
2456CONFIGFS_ATTR_RO(target_dev_, info);
2457CONFIGFS_ATTR_WO(target_dev_, control);
2458CONFIGFS_ATTR(target_dev_, alias);
2459CONFIGFS_ATTR(target_dev_, udev_path);
2460CONFIGFS_ATTR(target_dev_, enable);
2461CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2462CONFIGFS_ATTR(target_dev_, lba_map);
2463
2464static struct configfs_attribute *target_core_dev_attrs[] = {
2465 &target_dev_attr_info,
2466 &target_dev_attr_control,
2467 &target_dev_attr_alias,
2468 &target_dev_attr_udev_path,
2469 &target_dev_attr_enable,
2470 &target_dev_attr_alua_lu_gp,
2471 &target_dev_attr_lba_map,
2472 NULL,
2473};
2474
2475static void target_core_dev_release(struct config_item *item)
2476{
2477 struct config_group *dev_cg = to_config_group(item);
2478 struct se_device *dev =
2479 container_of(dev_cg, struct se_device, dev_group);
2480
2481 target_free_device(dev);
2482}
2483
2484/*
2485 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2486 * within target_fabric_port_link()
2487 */
2488struct configfs_item_operations target_core_dev_item_ops = {
2489 .release = target_core_dev_release,
2490};
2491
2492TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2493
2494/* End functions for struct config_item_type tb_dev_cit */
2495
2496/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2497
2498static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2499{
2500 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2501 lu_gp_group);
2502}
2503
2504static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2505{
2506 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2507
2508 if (!lu_gp->lu_gp_valid_id)
2509 return 0;
2510 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2511}
2512
2513static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2514 const char *page, size_t count)
2515{
2516 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2517 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2518 unsigned long lu_gp_id;
2519 int ret;
2520
2521 ret = kstrtoul(page, 0, &lu_gp_id);
2522 if (ret < 0) {
2523 pr_err("kstrtoul() returned %d for"
2524 " lu_gp_id\n", ret);
2525 return ret;
2526 }
2527 if (lu_gp_id > 0x0000ffff) {
2528 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2529 " 0x0000ffff\n", lu_gp_id);
2530 return -EINVAL;
2531 }
2532
2533 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2534 if (ret < 0)
2535 return -EINVAL;
2536
2537 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2538 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2539 config_item_name(&alua_lu_gp_cg->cg_item),
2540 lu_gp->lu_gp_id);
2541
2542 return count;
2543}
2544
2545static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2546{
2547 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2548 struct se_device *dev;
2549 struct se_hba *hba;
2550 struct t10_alua_lu_gp_member *lu_gp_mem;
2551 ssize_t len = 0, cur_len;
2552 unsigned char buf[LU_GROUP_NAME_BUF];
2553
2554 memset(buf, 0, LU_GROUP_NAME_BUF);
2555
2556 spin_lock(&lu_gp->lu_gp_lock);
2557 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2558 dev = lu_gp_mem->lu_gp_mem_dev;
2559 hba = dev->se_hba;
2560
2561 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2562 config_item_name(&hba->hba_group.cg_item),
2563 config_item_name(&dev->dev_group.cg_item));
2564 cur_len++; /* Extra byte for NULL terminator */
2565
2566 if ((cur_len + len) > PAGE_SIZE) {
2567 pr_warn("Ran out of lu_gp_show_attr"
2568 "_members buffer\n");
2569 break;
2570 }
2571 memcpy(page+len, buf, cur_len);
2572 len += cur_len;
2573 }
2574 spin_unlock(&lu_gp->lu_gp_lock);
2575
2576 return len;
2577}
2578
2579CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2580CONFIGFS_ATTR_RO(target_lu_gp_, members);
2581
2582static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2583 &target_lu_gp_attr_lu_gp_id,
2584 &target_lu_gp_attr_members,
2585 NULL,
2586};
2587
2588static void target_core_alua_lu_gp_release(struct config_item *item)
2589{
2590 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2591 struct t10_alua_lu_gp, lu_gp_group);
2592
2593 core_alua_free_lu_gp(lu_gp);
2594}
2595
2596static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2597 .release = target_core_alua_lu_gp_release,
2598};
2599
2600static const struct config_item_type target_core_alua_lu_gp_cit = {
2601 .ct_item_ops = &target_core_alua_lu_gp_ops,
2602 .ct_attrs = target_core_alua_lu_gp_attrs,
2603 .ct_owner = THIS_MODULE,
2604};
2605
2606/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2607
2608/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2609
2610static struct config_group *target_core_alua_create_lu_gp(
2611 struct config_group *group,
2612 const char *name)
2613{
2614 struct t10_alua_lu_gp *lu_gp;
2615 struct config_group *alua_lu_gp_cg = NULL;
2616 struct config_item *alua_lu_gp_ci = NULL;
2617
2618 lu_gp = core_alua_allocate_lu_gp(name, 0);
2619 if (IS_ERR(lu_gp))
2620 return NULL;
2621
2622 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2623 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2624
2625 config_group_init_type_name(alua_lu_gp_cg, name,
2626 &target_core_alua_lu_gp_cit);
2627
2628 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2629 " Group: core/alua/lu_gps/%s\n",
2630 config_item_name(alua_lu_gp_ci));
2631
2632 return alua_lu_gp_cg;
2633
2634}
2635
2636static void target_core_alua_drop_lu_gp(
2637 struct config_group *group,
2638 struct config_item *item)
2639{
2640 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2641 struct t10_alua_lu_gp, lu_gp_group);
2642
2643 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2644 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2645 config_item_name(item), lu_gp->lu_gp_id);
2646 /*
2647 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2648 * -> target_core_alua_lu_gp_release()
2649 */
2650 config_item_put(item);
2651}
2652
2653static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2654 .make_group = &target_core_alua_create_lu_gp,
2655 .drop_item = &target_core_alua_drop_lu_gp,
2656};
2657
2658static const struct config_item_type target_core_alua_lu_gps_cit = {
2659 .ct_item_ops = NULL,
2660 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2661 .ct_owner = THIS_MODULE,
2662};
2663
2664/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2665
2666/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2667
2668static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2669{
2670 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2671 tg_pt_gp_group);
2672}
2673
2674static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2675 char *page)
2676{
2677 return sprintf(page, "%d\n",
2678 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2679}
2680
2681static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2682 const char *page, size_t count)
2683{
2684 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2685 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2686 unsigned long tmp;
2687 int new_state, ret;
2688
2689 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2690 pr_err("Unable to do implicit ALUA on non valid"
2691 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2692 return -EINVAL;
2693 }
2694 if (!target_dev_configured(dev)) {
2695 pr_err("Unable to set alua_access_state while device is"
2696 " not configured\n");
2697 return -ENODEV;
2698 }
2699
2700 ret = kstrtoul(page, 0, &tmp);
2701 if (ret < 0) {
2702 pr_err("Unable to extract new ALUA access state from"
2703 " %s\n", page);
2704 return ret;
2705 }
2706 new_state = (int)tmp;
2707
2708 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2709 pr_err("Unable to process implicit configfs ALUA"
2710 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2711 return -EINVAL;
2712 }
2713 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2714 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2715 /* LBA DEPENDENT is only allowed with implicit ALUA */
2716 pr_err("Unable to process implicit configfs ALUA transition"
2717 " while explicit ALUA management is enabled\n");
2718 return -EINVAL;
2719 }
2720
2721 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2722 NULL, NULL, new_state, 0);
2723 return (!ret) ? count : -EINVAL;
2724}
2725
2726static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2727 char *page)
2728{
2729 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2730 return sprintf(page, "%s\n",
2731 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2732}
2733
2734static ssize_t target_tg_pt_gp_alua_access_status_store(
2735 struct config_item *item, const char *page, size_t count)
2736{
2737 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2738 unsigned long tmp;
2739 int new_status, ret;
2740
2741 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2742 pr_err("Unable to do set ALUA access status on non"
2743 " valid tg_pt_gp ID: %hu\n",
2744 tg_pt_gp->tg_pt_gp_valid_id);
2745 return -EINVAL;
2746 }
2747
2748 ret = kstrtoul(page, 0, &tmp);
2749 if (ret < 0) {
2750 pr_err("Unable to extract new ALUA access status"
2751 " from %s\n", page);
2752 return ret;
2753 }
2754 new_status = (int)tmp;
2755
2756 if ((new_status != ALUA_STATUS_NONE) &&
2757 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2758 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2759 pr_err("Illegal ALUA access status: 0x%02x\n",
2760 new_status);
2761 return -EINVAL;
2762 }
2763
2764 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2765 return count;
2766}
2767
2768static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2769 char *page)
2770{
2771 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2772}
2773
2774static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2775 const char *page, size_t count)
2776{
2777 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2778}
2779
2780#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2781static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2782 struct config_item *item, char *p) \
2783{ \
2784 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2785 return sprintf(p, "%d\n", \
2786 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2787} \
2788 \
2789static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2790 struct config_item *item, const char *p, size_t c) \
2791{ \
2792 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2793 unsigned long tmp; \
2794 int ret; \
2795 \
2796 if (!t->tg_pt_gp_valid_id) { \
2797 pr_err("Unable to do set " #_name " ALUA state on non" \
2798 " valid tg_pt_gp ID: %hu\n", \
2799 t->tg_pt_gp_valid_id); \
2800 return -EINVAL; \
2801 } \
2802 \
2803 ret = kstrtoul(p, 0, &tmp); \
2804 if (ret < 0) { \
2805 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2806 return -EINVAL; \
2807 } \
2808 if (tmp > 1) { \
2809 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2810 return -EINVAL; \
2811 } \
2812 if (tmp) \
2813 t->tg_pt_gp_alua_supported_states |= _bit; \
2814 else \
2815 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2816 \
2817 return c; \
2818}
2819
2820ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2821ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2822ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2823ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2824ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2825ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2826ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2827
2828static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2829 struct config_item *item, char *page)
2830{
2831 return sprintf(page, "%d\n",
2832 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2833}
2834
2835static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2836 struct config_item *item, const char *page, size_t count)
2837{
2838 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2839 unsigned long tmp;
2840 int ret;
2841
2842 ret = kstrtoul(page, 0, &tmp);
2843 if (ret < 0) {
2844 pr_err("Unable to extract alua_write_metadata\n");
2845 return ret;
2846 }
2847
2848 if ((tmp != 0) && (tmp != 1)) {
2849 pr_err("Illegal value for alua_write_metadata:"
2850 " %lu\n", tmp);
2851 return -EINVAL;
2852 }
2853 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2854
2855 return count;
2856}
2857
2858static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2859 char *page)
2860{
2861 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2862}
2863
2864static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2865 const char *page, size_t count)
2866{
2867 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2868 count);
2869}
2870
2871static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2872 char *page)
2873{
2874 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2875}
2876
2877static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2878 const char *page, size_t count)
2879{
2880 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2881 count);
2882}
2883
2884static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2885 struct config_item *item, char *page)
2886{
2887 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2888}
2889
2890static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2891 struct config_item *item, const char *page, size_t count)
2892{
2893 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2894 count);
2895}
2896
2897static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2898 char *page)
2899{
2900 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2901}
2902
2903static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2904 const char *page, size_t count)
2905{
2906 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2907}
2908
2909static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2910 char *page)
2911{
2912 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2913
2914 if (!tg_pt_gp->tg_pt_gp_valid_id)
2915 return 0;
2916 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2917}
2918
2919static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2920 const char *page, size_t count)
2921{
2922 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2923 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2924 unsigned long tg_pt_gp_id;
2925 int ret;
2926
2927 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2928 if (ret < 0) {
2929 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2930 page);
2931 return ret;
2932 }
2933 if (tg_pt_gp_id > 0x0000ffff) {
2934 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2935 tg_pt_gp_id);
2936 return -EINVAL;
2937 }
2938
2939 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2940 if (ret < 0)
2941 return -EINVAL;
2942
2943 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2944 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2945 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2946 tg_pt_gp->tg_pt_gp_id);
2947
2948 return count;
2949}
2950
2951static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2952 char *page)
2953{
2954 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2955 struct se_lun *lun;
2956 ssize_t len = 0, cur_len;
2957 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2958
2959 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2960
2961 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2962 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2963 lun_tg_pt_gp_link) {
2964 struct se_portal_group *tpg = lun->lun_tpg;
2965
2966 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2967 "/%s\n", tpg->se_tpg_tfo->fabric_name,
2968 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2969 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2970 config_item_name(&lun->lun_group.cg_item));
2971 cur_len++; /* Extra byte for NULL terminator */
2972
2973 if ((cur_len + len) > PAGE_SIZE) {
2974 pr_warn("Ran out of lu_gp_show_attr"
2975 "_members buffer\n");
2976 break;
2977 }
2978 memcpy(page+len, buf, cur_len);
2979 len += cur_len;
2980 }
2981 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2982
2983 return len;
2984}
2985
2986CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2987CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2988CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2989CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2990CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2991CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2992CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2993CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2994CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2995CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2996CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2997CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2998CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2999CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3000CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3001CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3002CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3003
3004static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3005 &target_tg_pt_gp_attr_alua_access_state,
3006 &target_tg_pt_gp_attr_alua_access_status,
3007 &target_tg_pt_gp_attr_alua_access_type,
3008 &target_tg_pt_gp_attr_alua_support_transitioning,
3009 &target_tg_pt_gp_attr_alua_support_offline,
3010 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3011 &target_tg_pt_gp_attr_alua_support_unavailable,
3012 &target_tg_pt_gp_attr_alua_support_standby,
3013 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3014 &target_tg_pt_gp_attr_alua_support_active_optimized,
3015 &target_tg_pt_gp_attr_alua_write_metadata,
3016 &target_tg_pt_gp_attr_nonop_delay_msecs,
3017 &target_tg_pt_gp_attr_trans_delay_msecs,
3018 &target_tg_pt_gp_attr_implicit_trans_secs,
3019 &target_tg_pt_gp_attr_preferred,
3020 &target_tg_pt_gp_attr_tg_pt_gp_id,
3021 &target_tg_pt_gp_attr_members,
3022 NULL,
3023};
3024
3025static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3026{
3027 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3028 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3029
3030 core_alua_free_tg_pt_gp(tg_pt_gp);
3031}
3032
3033static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3034 .release = target_core_alua_tg_pt_gp_release,
3035};
3036
3037static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3038 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3039 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3040 .ct_owner = THIS_MODULE,
3041};
3042
3043/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3044
3045/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3046
3047static struct config_group *target_core_alua_create_tg_pt_gp(
3048 struct config_group *group,
3049 const char *name)
3050{
3051 struct t10_alua *alua = container_of(group, struct t10_alua,
3052 alua_tg_pt_gps_group);
3053 struct t10_alua_tg_pt_gp *tg_pt_gp;
3054 struct config_group *alua_tg_pt_gp_cg = NULL;
3055 struct config_item *alua_tg_pt_gp_ci = NULL;
3056
3057 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3058 if (!tg_pt_gp)
3059 return NULL;
3060
3061 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3062 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3063
3064 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3065 &target_core_alua_tg_pt_gp_cit);
3066
3067 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3068 " Group: alua/tg_pt_gps/%s\n",
3069 config_item_name(alua_tg_pt_gp_ci));
3070
3071 return alua_tg_pt_gp_cg;
3072}
3073
3074static void target_core_alua_drop_tg_pt_gp(
3075 struct config_group *group,
3076 struct config_item *item)
3077{
3078 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3079 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3080
3081 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3082 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3083 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3084 /*
3085 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3086 * -> target_core_alua_tg_pt_gp_release().
3087 */
3088 config_item_put(item);
3089}
3090
3091static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3092 .make_group = &target_core_alua_create_tg_pt_gp,
3093 .drop_item = &target_core_alua_drop_tg_pt_gp,
3094};
3095
3096TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3097
3098/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3099
3100/* Start functions for struct config_item_type target_core_alua_cit */
3101
3102/*
3103 * target_core_alua_cit is a ConfigFS group that lives under
3104 * /sys/kernel/config/target/core/alua. There are default groups
3105 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3106 * target_core_alua_cit in target_core_init_configfs() below.
3107 */
3108static const struct config_item_type target_core_alua_cit = {
3109 .ct_item_ops = NULL,
3110 .ct_attrs = NULL,
3111 .ct_owner = THIS_MODULE,
3112};
3113
3114/* End functions for struct config_item_type target_core_alua_cit */
3115
3116/* Start functions for struct config_item_type tb_dev_stat_cit */
3117
3118static struct config_group *target_core_stat_mkdir(
3119 struct config_group *group,
3120 const char *name)
3121{
3122 return ERR_PTR(-ENOSYS);
3123}
3124
3125static void target_core_stat_rmdir(
3126 struct config_group *group,
3127 struct config_item *item)
3128{
3129 return;
3130}
3131
3132static struct configfs_group_operations target_core_stat_group_ops = {
3133 .make_group = &target_core_stat_mkdir,
3134 .drop_item = &target_core_stat_rmdir,
3135};
3136
3137TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3138
3139/* End functions for struct config_item_type tb_dev_stat_cit */
3140
3141/* Start functions for struct config_item_type target_core_hba_cit */
3142
3143static struct config_group *target_core_make_subdev(
3144 struct config_group *group,
3145 const char *name)
3146{
3147 struct t10_alua_tg_pt_gp *tg_pt_gp;
3148 struct config_item *hba_ci = &group->cg_item;
3149 struct se_hba *hba = item_to_hba(hba_ci);
3150 struct target_backend *tb = hba->backend;
3151 struct se_device *dev;
3152 int errno = -ENOMEM, ret;
3153
3154 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3155 if (ret)
3156 return ERR_PTR(ret);
3157
3158 dev = target_alloc_device(hba, name);
3159 if (!dev)
3160 goto out_unlock;
3161
3162 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3163
3164 config_group_init_type_name(&dev->dev_action_group, "action",
3165 &tb->tb_dev_action_cit);
3166 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3167
3168 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3169 &tb->tb_dev_attrib_cit);
3170 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3171
3172 config_group_init_type_name(&dev->dev_pr_group, "pr",
3173 &tb->tb_dev_pr_cit);
3174 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3175
3176 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3177 &tb->tb_dev_wwn_cit);
3178 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3179 &dev->dev_group);
3180
3181 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3182 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3183 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3184 &dev->dev_group);
3185
3186 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3187 "statistics", &tb->tb_dev_stat_cit);
3188 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3189 &dev->dev_group);
3190
3191 /*
3192 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3193 */
3194 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3195 if (!tg_pt_gp)
3196 goto out_free_device;
3197 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3198
3199 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3200 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3201 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3202 &dev->t10_alua.alua_tg_pt_gps_group);
3203
3204 /*
3205 * Add core/$HBA/$DEV/statistics/ default groups
3206 */
3207 target_stat_setup_dev_default_groups(dev);
3208
3209 mutex_unlock(&hba->hba_access_mutex);
3210 return &dev->dev_group;
3211
3212out_free_device:
3213 target_free_device(dev);
3214out_unlock:
3215 mutex_unlock(&hba->hba_access_mutex);
3216 return ERR_PTR(errno);
3217}
3218
3219static void target_core_drop_subdev(
3220 struct config_group *group,
3221 struct config_item *item)
3222{
3223 struct config_group *dev_cg = to_config_group(item);
3224 struct se_device *dev =
3225 container_of(dev_cg, struct se_device, dev_group);
3226 struct se_hba *hba;
3227
3228 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3229
3230 mutex_lock(&hba->hba_access_mutex);
3231
3232 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3233 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3234
3235 /*
3236 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3237 * directly from target_core_alua_tg_pt_gp_release().
3238 */
3239 dev->t10_alua.default_tg_pt_gp = NULL;
3240
3241 configfs_remove_default_groups(dev_cg);
3242
3243 /*
3244 * se_dev is released from target_core_dev_item_ops->release()
3245 */
3246 config_item_put(item);
3247 mutex_unlock(&hba->hba_access_mutex);
3248}
3249
3250static struct configfs_group_operations target_core_hba_group_ops = {
3251 .make_group = target_core_make_subdev,
3252 .drop_item = target_core_drop_subdev,
3253};
3254
3255
3256static inline struct se_hba *to_hba(struct config_item *item)
3257{
3258 return container_of(to_config_group(item), struct se_hba, hba_group);
3259}
3260
3261static ssize_t target_hba_info_show(struct config_item *item, char *page)
3262{
3263 struct se_hba *hba = to_hba(item);
3264
3265 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3266 hba->hba_id, hba->backend->ops->name,
3267 TARGET_CORE_VERSION);
3268}
3269
3270static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3271{
3272 struct se_hba *hba = to_hba(item);
3273 int hba_mode = 0;
3274
3275 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3276 hba_mode = 1;
3277
3278 return sprintf(page, "%d\n", hba_mode);
3279}
3280
3281static ssize_t target_hba_mode_store(struct config_item *item,
3282 const char *page, size_t count)
3283{
3284 struct se_hba *hba = to_hba(item);
3285 unsigned long mode_flag;
3286 int ret;
3287
3288 if (hba->backend->ops->pmode_enable_hba == NULL)
3289 return -EINVAL;
3290
3291 ret = kstrtoul(page, 0, &mode_flag);
3292 if (ret < 0) {
3293 pr_err("Unable to extract hba mode flag: %d\n", ret);
3294 return ret;
3295 }
3296
3297 if (hba->dev_count) {
3298 pr_err("Unable to set hba_mode with active devices\n");
3299 return -EINVAL;
3300 }
3301
3302 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3303 if (ret < 0)
3304 return -EINVAL;
3305 if (ret > 0)
3306 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3307 else if (ret == 0)
3308 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3309
3310 return count;
3311}
3312
3313CONFIGFS_ATTR_RO(target_, hba_info);
3314CONFIGFS_ATTR(target_, hba_mode);
3315
3316static void target_core_hba_release(struct config_item *item)
3317{
3318 struct se_hba *hba = container_of(to_config_group(item),
3319 struct se_hba, hba_group);
3320 core_delete_hba(hba);
3321}
3322
3323static struct configfs_attribute *target_core_hba_attrs[] = {
3324 &target_attr_hba_info,
3325 &target_attr_hba_mode,
3326 NULL,
3327};
3328
3329static struct configfs_item_operations target_core_hba_item_ops = {
3330 .release = target_core_hba_release,
3331};
3332
3333static const struct config_item_type target_core_hba_cit = {
3334 .ct_item_ops = &target_core_hba_item_ops,
3335 .ct_group_ops = &target_core_hba_group_ops,
3336 .ct_attrs = target_core_hba_attrs,
3337 .ct_owner = THIS_MODULE,
3338};
3339
3340static struct config_group *target_core_call_addhbatotarget(
3341 struct config_group *group,
3342 const char *name)
3343{
3344 char *se_plugin_str, *str, *str2;
3345 struct se_hba *hba;
3346 char buf[TARGET_CORE_NAME_MAX_LEN];
3347 unsigned long plugin_dep_id = 0;
3348 int ret;
3349
3350 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3351 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3352 pr_err("Passed *name strlen(): %d exceeds"
3353 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3354 TARGET_CORE_NAME_MAX_LEN);
3355 return ERR_PTR(-ENAMETOOLONG);
3356 }
3357 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3358
3359 str = strstr(buf, "_");
3360 if (!str) {
3361 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3362 return ERR_PTR(-EINVAL);
3363 }
3364 se_plugin_str = buf;
3365 /*
3366 * Special case for subsystem plugins that have "_" in their names.
3367 * Namely rd_direct and rd_mcp..
3368 */
3369 str2 = strstr(str+1, "_");
3370 if (str2) {
3371 *str2 = '\0'; /* Terminate for *se_plugin_str */
3372 str2++; /* Skip to start of plugin dependent ID */
3373 str = str2;
3374 } else {
3375 *str = '\0'; /* Terminate for *se_plugin_str */
3376 str++; /* Skip to start of plugin dependent ID */
3377 }
3378
3379 ret = kstrtoul(str, 0, &plugin_dep_id);
3380 if (ret < 0) {
3381 pr_err("kstrtoul() returned %d for"
3382 " plugin_dep_id\n", ret);
3383 return ERR_PTR(ret);
3384 }
3385 /*
3386 * Load up TCM subsystem plugins if they have not already been loaded.
3387 */
3388 transport_subsystem_check_init();
3389
3390 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3391 if (IS_ERR(hba))
3392 return ERR_CAST(hba);
3393
3394 config_group_init_type_name(&hba->hba_group, name,
3395 &target_core_hba_cit);
3396
3397 return &hba->hba_group;
3398}
3399
3400static void target_core_call_delhbafromtarget(
3401 struct config_group *group,
3402 struct config_item *item)
3403{
3404 /*
3405 * core_delete_hba() is called from target_core_hba_item_ops->release()
3406 * -> target_core_hba_release()
3407 */
3408 config_item_put(item);
3409}
3410
3411static struct configfs_group_operations target_core_group_ops = {
3412 .make_group = target_core_call_addhbatotarget,
3413 .drop_item = target_core_call_delhbafromtarget,
3414};
3415
3416static const struct config_item_type target_core_cit = {
3417 .ct_item_ops = NULL,
3418 .ct_group_ops = &target_core_group_ops,
3419 .ct_attrs = NULL,
3420 .ct_owner = THIS_MODULE,
3421};
3422
3423/* Stop functions for struct config_item_type target_core_hba_cit */
3424
3425void target_setup_backend_cits(struct target_backend *tb)
3426{
3427 target_core_setup_dev_cit(tb);
3428 target_core_setup_dev_action_cit(tb);
3429 target_core_setup_dev_attrib_cit(tb);
3430 target_core_setup_dev_pr_cit(tb);
3431 target_core_setup_dev_wwn_cit(tb);
3432 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3433 target_core_setup_dev_stat_cit(tb);
3434}
3435
3436static void target_init_dbroot(void)
3437{
3438 struct file *fp;
3439
3440 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3441 fp = filp_open(db_root_stage, O_RDONLY, 0);
3442 if (IS_ERR(fp)) {
3443 pr_err("db_root: cannot open: %s\n", db_root_stage);
3444 return;
3445 }
3446 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3447 filp_close(fp, NULL);
3448 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3449 return;
3450 }
3451 filp_close(fp, NULL);
3452
3453 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3454 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3455}
3456
3457static int __init target_core_init_configfs(void)
3458{
3459 struct configfs_subsystem *subsys = &target_core_fabrics;
3460 struct t10_alua_lu_gp *lu_gp;
3461 int ret;
3462
3463 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3464 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3465 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3466
3467 config_group_init(&subsys->su_group);
3468 mutex_init(&subsys->su_mutex);
3469
3470 ret = init_se_kmem_caches();
3471 if (ret < 0)
3472 return ret;
3473 /*
3474 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3475 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3476 */
3477 config_group_init_type_name(&target_core_hbagroup, "core",
3478 &target_core_cit);
3479 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3480
3481 /*
3482 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3483 */
3484 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3485 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3486
3487 /*
3488 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3489 * groups under /sys/kernel/config/target/core/alua/
3490 */
3491 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3492 &target_core_alua_lu_gps_cit);
3493 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3494
3495 /*
3496 * Add core/alua/lu_gps/default_lu_gp
3497 */
3498 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3499 if (IS_ERR(lu_gp)) {
3500 ret = -ENOMEM;
3501 goto out_global;
3502 }
3503
3504 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3505 &target_core_alua_lu_gp_cit);
3506 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3507
3508 default_lu_gp = lu_gp;
3509
3510 /*
3511 * Register the target_core_mod subsystem with configfs.
3512 */
3513 ret = configfs_register_subsystem(subsys);
3514 if (ret < 0) {
3515 pr_err("Error %d while registering subsystem %s\n",
3516 ret, subsys->su_group.cg_item.ci_namebuf);
3517 goto out_global;
3518 }
3519 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3520 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3521 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3522 /*
3523 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3524 */
3525 ret = rd_module_init();
3526 if (ret < 0)
3527 goto out;
3528
3529 ret = core_dev_setup_virtual_lun0();
3530 if (ret < 0)
3531 goto out;
3532
3533 ret = target_xcopy_setup_pt();
3534 if (ret < 0)
3535 goto out;
3536
3537 target_init_dbroot();
3538
3539 return 0;
3540
3541out:
3542 configfs_unregister_subsystem(subsys);
3543 core_dev_release_virtual_lun0();
3544 rd_module_exit();
3545out_global:
3546 if (default_lu_gp) {
3547 core_alua_free_lu_gp(default_lu_gp);
3548 default_lu_gp = NULL;
3549 }
3550 release_se_kmem_caches();
3551 return ret;
3552}
3553
3554static void __exit target_core_exit_configfs(void)
3555{
3556 configfs_remove_default_groups(&alua_lu_gps_group);
3557 configfs_remove_default_groups(&alua_group);
3558 configfs_remove_default_groups(&target_core_hbagroup);
3559
3560 /*
3561 * We expect subsys->su_group.default_groups to be released
3562 * by configfs subsystem provider logic..
3563 */
3564 configfs_unregister_subsystem(&target_core_fabrics);
3565
3566 core_alua_free_lu_gp(default_lu_gp);
3567 default_lu_gp = NULL;
3568
3569 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3570 " Infrastructure\n");
3571
3572 core_dev_release_virtual_lun0();
3573 rd_module_exit();
3574 target_xcopy_release_pt();
3575 release_se_kmem_caches();
3576}
3577
3578MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3579MODULE_AUTHOR("nab@Linux-iSCSI.org");
3580MODULE_LICENSE("GPL");
3581
3582module_init(target_core_init_configfs);
3583module_exit(target_core_exit_configfs);