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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 != TARGET_UA_INTLCK_CTRL_CLEAR
688 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
689 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
690 pr_err("Illegal value %d\n", val);
691 return -EINVAL;
692 }
693
694 if (da->da_dev->export_count) {
695 pr_err("dev[%p]: Unable to change SE Device"
696 " UA_INTRLCK_CTRL while export_count is %d\n",
697 da->da_dev, da->da_dev->export_count);
698 return -EINVAL;
699 }
700 da->emulate_ua_intlck_ctrl = val;
701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
702 da->da_dev, val);
703 return count;
704}
705
706static ssize_t emulate_tas_store(struct config_item *item,
707 const char *page, size_t count)
708{
709 struct se_dev_attrib *da = to_attrib(item);
710 bool flag;
711 int ret;
712
713 ret = strtobool(page, &flag);
714 if (ret < 0)
715 return ret;
716
717 if (da->da_dev->export_count) {
718 pr_err("dev[%p]: Unable to change SE Device TAS while"
719 " export_count is %d\n",
720 da->da_dev, da->da_dev->export_count);
721 return -EINVAL;
722 }
723 da->emulate_tas = flag;
724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
725 da->da_dev, flag ? "Enabled" : "Disabled");
726
727 return count;
728}
729
730static ssize_t emulate_tpu_store(struct config_item *item,
731 const char *page, size_t count)
732{
733 struct se_dev_attrib *da = to_attrib(item);
734 bool flag;
735 int ret;
736
737 ret = strtobool(page, &flag);
738 if (ret < 0)
739 return ret;
740
741 /*
742 * We expect this value to be non-zero when generic Block Layer
743 * Discard supported is detected iblock_create_virtdevice().
744 */
745 if (flag && !da->max_unmap_block_desc_count) {
746 pr_err("Generic Block Discard not supported\n");
747 return -ENOSYS;
748 }
749
750 da->emulate_tpu = flag;
751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
752 da->da_dev, flag);
753 return count;
754}
755
756static ssize_t emulate_tpws_store(struct config_item *item,
757 const char *page, size_t count)
758{
759 struct se_dev_attrib *da = to_attrib(item);
760 bool flag;
761 int ret;
762
763 ret = strtobool(page, &flag);
764 if (ret < 0)
765 return ret;
766
767 /*
768 * We expect this value to be non-zero when generic Block Layer
769 * Discard supported is detected iblock_create_virtdevice().
770 */
771 if (flag && !da->max_unmap_block_desc_count) {
772 pr_err("Generic Block Discard not supported\n");
773 return -ENOSYS;
774 }
775
776 da->emulate_tpws = flag;
777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
778 da->da_dev, flag);
779 return count;
780}
781
782static ssize_t pi_prot_type_store(struct config_item *item,
783 const char *page, size_t count)
784{
785 struct se_dev_attrib *da = to_attrib(item);
786 int old_prot = da->pi_prot_type, ret;
787 struct se_device *dev = da->da_dev;
788 u32 flag;
789
790 ret = kstrtou32(page, 0, &flag);
791 if (ret < 0)
792 return ret;
793
794 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
795 pr_err("Illegal value %d for pi_prot_type\n", flag);
796 return -EINVAL;
797 }
798 if (flag == 2) {
799 pr_err("DIF TYPE2 protection currently not supported\n");
800 return -ENOSYS;
801 }
802 if (da->hw_pi_prot_type) {
803 pr_warn("DIF protection enabled on underlying hardware,"
804 " ignoring\n");
805 return count;
806 }
807 if (!dev->transport->init_prot || !dev->transport->free_prot) {
808 /* 0 is only allowed value for non-supporting backends */
809 if (flag == 0)
810 return count;
811
812 pr_err("DIF protection not supported by backend: %s\n",
813 dev->transport->name);
814 return -ENOSYS;
815 }
816 if (!target_dev_configured(dev)) {
817 pr_err("DIF protection requires device to be configured\n");
818 return -ENODEV;
819 }
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device PROT type while"
822 " export_count is %d\n", dev, dev->export_count);
823 return -EINVAL;
824 }
825
826 da->pi_prot_type = flag;
827
828 if (flag && !old_prot) {
829 ret = dev->transport->init_prot(dev);
830 if (ret) {
831 da->pi_prot_type = old_prot;
832 da->pi_prot_verify = (bool) da->pi_prot_type;
833 return ret;
834 }
835
836 } else if (!flag && old_prot) {
837 dev->transport->free_prot(dev);
838 }
839
840 da->pi_prot_verify = (bool) da->pi_prot_type;
841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
842 return count;
843}
844
845/* always zero, but attr needs to remain RW to avoid userspace breakage */
846static ssize_t pi_prot_format_show(struct config_item *item, char *page)
847{
848 return snprintf(page, PAGE_SIZE, "0\n");
849}
850
851static ssize_t pi_prot_format_store(struct config_item *item,
852 const char *page, size_t count)
853{
854 struct se_dev_attrib *da = to_attrib(item);
855 struct se_device *dev = da->da_dev;
856 bool flag;
857 int ret;
858
859 ret = strtobool(page, &flag);
860 if (ret < 0)
861 return ret;
862
863 if (!flag)
864 return count;
865
866 if (!dev->transport->format_prot) {
867 pr_err("DIF protection format not supported by backend %s\n",
868 dev->transport->name);
869 return -ENOSYS;
870 }
871 if (!target_dev_configured(dev)) {
872 pr_err("DIF protection format requires device to be configured\n");
873 return -ENODEV;
874 }
875 if (dev->export_count) {
876 pr_err("dev[%p]: Unable to format SE Device PROT type while"
877 " export_count is %d\n", dev, dev->export_count);
878 return -EINVAL;
879 }
880
881 ret = dev->transport->format_prot(dev);
882 if (ret)
883 return ret;
884
885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
886 return count;
887}
888
889static ssize_t pi_prot_verify_store(struct config_item *item,
890 const char *page, size_t count)
891{
892 struct se_dev_attrib *da = to_attrib(item);
893 bool flag;
894 int ret;
895
896 ret = strtobool(page, &flag);
897 if (ret < 0)
898 return ret;
899
900 if (!flag) {
901 da->pi_prot_verify = flag;
902 return count;
903 }
904 if (da->hw_pi_prot_type) {
905 pr_warn("DIF protection enabled on underlying hardware,"
906 " ignoring\n");
907 return count;
908 }
909 if (!da->pi_prot_type) {
910 pr_warn("DIF protection not supported by backend, ignoring\n");
911 return count;
912 }
913 da->pi_prot_verify = flag;
914
915 return count;
916}
917
918static ssize_t force_pr_aptpl_store(struct config_item *item,
919 const char *page, size_t count)
920{
921 struct se_dev_attrib *da = to_attrib(item);
922 bool flag;
923 int ret;
924
925 ret = strtobool(page, &flag);
926 if (ret < 0)
927 return ret;
928 if (da->da_dev->export_count) {
929 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
930 " export_count is %d\n",
931 da->da_dev, da->da_dev->export_count);
932 return -EINVAL;
933 }
934
935 da->force_pr_aptpl = flag;
936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
937 return count;
938}
939
940static ssize_t emulate_rest_reord_store(struct config_item *item,
941 const char *page, size_t count)
942{
943 struct se_dev_attrib *da = to_attrib(item);
944 bool flag;
945 int ret;
946
947 ret = strtobool(page, &flag);
948 if (ret < 0)
949 return ret;
950
951 if (flag != 0) {
952 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
953 " reordering not implemented\n", da->da_dev);
954 return -ENOSYS;
955 }
956 da->emulate_rest_reord = flag;
957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
958 da->da_dev, flag);
959 return count;
960}
961
962static ssize_t unmap_zeroes_data_store(struct config_item *item,
963 const char *page, size_t count)
964{
965 struct se_dev_attrib *da = to_attrib(item);
966 bool flag;
967 int ret;
968
969 ret = strtobool(page, &flag);
970 if (ret < 0)
971 return ret;
972
973 if (da->da_dev->export_count) {
974 pr_err("dev[%p]: Unable to change SE Device"
975 " unmap_zeroes_data while export_count is %d\n",
976 da->da_dev, da->da_dev->export_count);
977 return -EINVAL;
978 }
979 /*
980 * We expect this value to be non-zero when generic Block Layer
981 * Discard supported is detected iblock_configure_device().
982 */
983 if (flag && !da->max_unmap_block_desc_count) {
984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
985 " because max_unmap_block_desc_count is zero\n",
986 da->da_dev);
987 return -ENOSYS;
988 }
989 da->unmap_zeroes_data = flag;
990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
991 da->da_dev, flag);
992 return count;
993}
994
995/*
996 * Note, this can only be called on unexported SE Device Object.
997 */
998static ssize_t queue_depth_store(struct config_item *item,
999 const char *page, size_t count)
1000{
1001 struct se_dev_attrib *da = to_attrib(item);
1002 struct se_device *dev = da->da_dev;
1003 u32 val;
1004 int ret;
1005
1006 ret = kstrtou32(page, 0, &val);
1007 if (ret < 0)
1008 return ret;
1009
1010 if (dev->export_count) {
1011 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012 " export_count is %d\n",
1013 dev, dev->export_count);
1014 return -EINVAL;
1015 }
1016 if (!val) {
1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018 return -EINVAL;
1019 }
1020
1021 if (val > dev->dev_attrib.queue_depth) {
1022 if (val > dev->dev_attrib.hw_queue_depth) {
1023 pr_err("dev[%p]: Passed queue_depth:"
1024 " %u exceeds TCM/SE_Device MAX"
1025 " TCQ: %u\n", dev, val,
1026 dev->dev_attrib.hw_queue_depth);
1027 return -EINVAL;
1028 }
1029 }
1030 da->queue_depth = dev->queue_depth = val;
1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032 return count;
1033}
1034
1035static ssize_t optimal_sectors_store(struct config_item *item,
1036 const char *page, size_t count)
1037{
1038 struct se_dev_attrib *da = to_attrib(item);
1039 u32 val;
1040 int ret;
1041
1042 ret = kstrtou32(page, 0, &val);
1043 if (ret < 0)
1044 return ret;
1045
1046 if (da->da_dev->export_count) {
1047 pr_err("dev[%p]: Unable to change SE Device"
1048 " optimal_sectors while export_count is %d\n",
1049 da->da_dev, da->da_dev->export_count);
1050 return -EINVAL;
1051 }
1052 if (val > da->hw_max_sectors) {
1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054 " greater than hw_max_sectors: %u\n",
1055 da->da_dev, val, da->hw_max_sectors);
1056 return -EINVAL;
1057 }
1058
1059 da->optimal_sectors = val;
1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061 da->da_dev, val);
1062 return count;
1063}
1064
1065static ssize_t block_size_store(struct config_item *item,
1066 const char *page, size_t count)
1067{
1068 struct se_dev_attrib *da = to_attrib(item);
1069 u32 val;
1070 int ret;
1071
1072 ret = kstrtou32(page, 0, &val);
1073 if (ret < 0)
1074 return ret;
1075
1076 if (da->da_dev->export_count) {
1077 pr_err("dev[%p]: Unable to change SE Device block_size"
1078 " while export_count is %d\n",
1079 da->da_dev, da->da_dev->export_count);
1080 return -EINVAL;
1081 }
1082
1083 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084 pr_err("dev[%p]: Illegal value for block_device: %u"
1085 " for SE device, must be 512, 1024, 2048 or 4096\n",
1086 da->da_dev, val);
1087 return -EINVAL;
1088 }
1089
1090 da->block_size = val;
1091 if (da->max_bytes_per_io)
1092 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095 da->da_dev, val);
1096 return count;
1097}
1098
1099static ssize_t alua_support_show(struct config_item *item, char *page)
1100{
1101 struct se_dev_attrib *da = to_attrib(item);
1102 u8 flags = da->da_dev->transport_flags;
1103
1104 return snprintf(page, PAGE_SIZE, "%d\n",
1105 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106}
1107
1108static ssize_t alua_support_store(struct config_item *item,
1109 const char *page, size_t count)
1110{
1111 struct se_dev_attrib *da = to_attrib(item);
1112 struct se_device *dev = da->da_dev;
1113 bool flag, oldflag;
1114 int ret;
1115
1116 ret = strtobool(page, &flag);
1117 if (ret < 0)
1118 return ret;
1119
1120 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1121 if (flag == oldflag)
1122 return count;
1123
1124 if (!(dev->transport->transport_flags_changeable &
1125 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1126 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1127 " alua_support has fixed value\n", dev);
1128 return -ENOSYS;
1129 }
1130
1131 if (flag)
1132 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1133 else
1134 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1135 return count;
1136}
1137
1138static ssize_t pgr_support_show(struct config_item *item, char *page)
1139{
1140 struct se_dev_attrib *da = to_attrib(item);
1141 u8 flags = da->da_dev->transport_flags;
1142
1143 return snprintf(page, PAGE_SIZE, "%d\n",
1144 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1145}
1146
1147static ssize_t pgr_support_store(struct config_item *item,
1148 const char *page, size_t count)
1149{
1150 struct se_dev_attrib *da = to_attrib(item);
1151 struct se_device *dev = da->da_dev;
1152 bool flag, oldflag;
1153 int ret;
1154
1155 ret = strtobool(page, &flag);
1156 if (ret < 0)
1157 return ret;
1158
1159 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1160 if (flag == oldflag)
1161 return count;
1162
1163 if (!(dev->transport->transport_flags_changeable &
1164 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1165 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1166 " pgr_support has fixed value\n", dev);
1167 return -ENOSYS;
1168 }
1169
1170 if (flag)
1171 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1172 else
1173 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1174 return count;
1175}
1176
1177CONFIGFS_ATTR(, emulate_model_alias);
1178CONFIGFS_ATTR(, emulate_dpo);
1179CONFIGFS_ATTR(, emulate_fua_write);
1180CONFIGFS_ATTR(, emulate_fua_read);
1181CONFIGFS_ATTR(, emulate_write_cache);
1182CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1183CONFIGFS_ATTR(, emulate_tas);
1184CONFIGFS_ATTR(, emulate_tpu);
1185CONFIGFS_ATTR(, emulate_tpws);
1186CONFIGFS_ATTR(, emulate_caw);
1187CONFIGFS_ATTR(, emulate_3pc);
1188CONFIGFS_ATTR(, emulate_pr);
1189CONFIGFS_ATTR(, pi_prot_type);
1190CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1191CONFIGFS_ATTR(, pi_prot_format);
1192CONFIGFS_ATTR(, pi_prot_verify);
1193CONFIGFS_ATTR(, enforce_pr_isids);
1194CONFIGFS_ATTR(, is_nonrot);
1195CONFIGFS_ATTR(, emulate_rest_reord);
1196CONFIGFS_ATTR(, force_pr_aptpl);
1197CONFIGFS_ATTR_RO(, hw_block_size);
1198CONFIGFS_ATTR(, block_size);
1199CONFIGFS_ATTR_RO(, hw_max_sectors);
1200CONFIGFS_ATTR(, optimal_sectors);
1201CONFIGFS_ATTR_RO(, hw_queue_depth);
1202CONFIGFS_ATTR(, queue_depth);
1203CONFIGFS_ATTR(, max_unmap_lba_count);
1204CONFIGFS_ATTR(, max_unmap_block_desc_count);
1205CONFIGFS_ATTR(, unmap_granularity);
1206CONFIGFS_ATTR(, unmap_granularity_alignment);
1207CONFIGFS_ATTR(, unmap_zeroes_data);
1208CONFIGFS_ATTR(, max_write_same_len);
1209CONFIGFS_ATTR(, alua_support);
1210CONFIGFS_ATTR(, pgr_support);
1211
1212/*
1213 * dev_attrib attributes for devices using the target core SBC/SPC
1214 * interpreter. Any backend using spc_parse_cdb should be using
1215 * these.
1216 */
1217struct configfs_attribute *sbc_attrib_attrs[] = {
1218 &attr_emulate_model_alias,
1219 &attr_emulate_dpo,
1220 &attr_emulate_fua_write,
1221 &attr_emulate_fua_read,
1222 &attr_emulate_write_cache,
1223 &attr_emulate_ua_intlck_ctrl,
1224 &attr_emulate_tas,
1225 &attr_emulate_tpu,
1226 &attr_emulate_tpws,
1227 &attr_emulate_caw,
1228 &attr_emulate_3pc,
1229 &attr_emulate_pr,
1230 &attr_pi_prot_type,
1231 &attr_hw_pi_prot_type,
1232 &attr_pi_prot_format,
1233 &attr_pi_prot_verify,
1234 &attr_enforce_pr_isids,
1235 &attr_is_nonrot,
1236 &attr_emulate_rest_reord,
1237 &attr_force_pr_aptpl,
1238 &attr_hw_block_size,
1239 &attr_block_size,
1240 &attr_hw_max_sectors,
1241 &attr_optimal_sectors,
1242 &attr_hw_queue_depth,
1243 &attr_queue_depth,
1244 &attr_max_unmap_lba_count,
1245 &attr_max_unmap_block_desc_count,
1246 &attr_unmap_granularity,
1247 &attr_unmap_granularity_alignment,
1248 &attr_unmap_zeroes_data,
1249 &attr_max_write_same_len,
1250 &attr_alua_support,
1251 &attr_pgr_support,
1252 NULL,
1253};
1254EXPORT_SYMBOL(sbc_attrib_attrs);
1255
1256/*
1257 * Minimal dev_attrib attributes for devices passing through CDBs.
1258 * In this case we only provide a few read-only attributes for
1259 * backwards compatibility.
1260 */
1261struct configfs_attribute *passthrough_attrib_attrs[] = {
1262 &attr_hw_pi_prot_type,
1263 &attr_hw_block_size,
1264 &attr_hw_max_sectors,
1265 &attr_hw_queue_depth,
1266 &attr_emulate_pr,
1267 &attr_alua_support,
1268 &attr_pgr_support,
1269 NULL,
1270};
1271EXPORT_SYMBOL(passthrough_attrib_attrs);
1272
1273/*
1274 * pr related dev_attrib attributes for devices passing through CDBs,
1275 * but allowing in core pr emulation.
1276 */
1277struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1278 &attr_enforce_pr_isids,
1279 &attr_force_pr_aptpl,
1280 NULL,
1281};
1282EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1283
1284TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1285TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1286
1287/* End functions for struct config_item_type tb_dev_attrib_cit */
1288
1289/* Start functions for struct config_item_type tb_dev_wwn_cit */
1290
1291static struct t10_wwn *to_t10_wwn(struct config_item *item)
1292{
1293 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1294}
1295
1296static ssize_t target_check_inquiry_data(char *buf)
1297{
1298 size_t len;
1299 int i;
1300
1301 len = strlen(buf);
1302
1303 /*
1304 * SPC 4.3.1:
1305 * ASCII data fields shall contain only ASCII printable characters
1306 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1307 * more ASCII null (00h) characters.
1308 */
1309 for (i = 0; i < len; i++) {
1310 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1311 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1312 return -EINVAL;
1313 }
1314 }
1315
1316 return len;
1317}
1318
1319/*
1320 * STANDARD and VPD page 0x83 T10 Vendor Identification
1321 */
1322static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1323 char *page)
1324{
1325 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1326}
1327
1328static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1329 const char *page, size_t count)
1330{
1331 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1332 struct se_device *dev = t10_wwn->t10_dev;
1333 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1334 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1335 char *stripped = NULL;
1336 size_t len;
1337 ssize_t ret;
1338
1339 len = strlcpy(buf, page, sizeof(buf));
1340 if (len < sizeof(buf)) {
1341 /* Strip any newline added from userspace. */
1342 stripped = strstrip(buf);
1343 len = strlen(stripped);
1344 }
1345 if (len > INQUIRY_VENDOR_LEN) {
1346 pr_err("Emulated T10 Vendor Identification exceeds"
1347 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1348 "\n");
1349 return -EOVERFLOW;
1350 }
1351
1352 ret = target_check_inquiry_data(stripped);
1353
1354 if (ret < 0)
1355 return ret;
1356
1357 /*
1358 * Check to see if any active exports exist. If they do exist, fail
1359 * here as changing this information on the fly (underneath the
1360 * initiator side OS dependent multipath code) could cause negative
1361 * effects.
1362 */
1363 if (dev->export_count) {
1364 pr_err("Unable to set T10 Vendor Identification while"
1365 " active %d exports exist\n", dev->export_count);
1366 return -EINVAL;
1367 }
1368
1369 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1370 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1371
1372 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1373 " %s\n", dev->t10_wwn.vendor);
1374
1375 return count;
1376}
1377
1378static ssize_t target_wwn_product_id_show(struct config_item *item,
1379 char *page)
1380{
1381 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1382}
1383
1384static ssize_t target_wwn_product_id_store(struct config_item *item,
1385 const char *page, size_t count)
1386{
1387 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1388 struct se_device *dev = t10_wwn->t10_dev;
1389 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1390 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1391 char *stripped = NULL;
1392 size_t len;
1393 ssize_t ret;
1394
1395 len = strlcpy(buf, page, sizeof(buf));
1396 if (len < sizeof(buf)) {
1397 /* Strip any newline added from userspace. */
1398 stripped = strstrip(buf);
1399 len = strlen(stripped);
1400 }
1401 if (len > INQUIRY_MODEL_LEN) {
1402 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1403 __stringify(INQUIRY_MODEL_LEN)
1404 "\n");
1405 return -EOVERFLOW;
1406 }
1407
1408 ret = target_check_inquiry_data(stripped);
1409
1410 if (ret < 0)
1411 return ret;
1412
1413 /*
1414 * Check to see if any active exports exist. If they do exist, fail
1415 * here as changing this information on the fly (underneath the
1416 * initiator side OS dependent multipath code) could cause negative
1417 * effects.
1418 */
1419 if (dev->export_count) {
1420 pr_err("Unable to set T10 Model while active %d exports exist\n",
1421 dev->export_count);
1422 return -EINVAL;
1423 }
1424
1425 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1426 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1427
1428 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1429 dev->t10_wwn.model);
1430
1431 return count;
1432}
1433
1434static ssize_t target_wwn_revision_show(struct config_item *item,
1435 char *page)
1436{
1437 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1438}
1439
1440static ssize_t target_wwn_revision_store(struct config_item *item,
1441 const char *page, size_t count)
1442{
1443 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1444 struct se_device *dev = t10_wwn->t10_dev;
1445 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1446 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1447 char *stripped = NULL;
1448 size_t len;
1449 ssize_t ret;
1450
1451 len = strlcpy(buf, page, sizeof(buf));
1452 if (len < sizeof(buf)) {
1453 /* Strip any newline added from userspace. */
1454 stripped = strstrip(buf);
1455 len = strlen(stripped);
1456 }
1457 if (len > INQUIRY_REVISION_LEN) {
1458 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1459 __stringify(INQUIRY_REVISION_LEN)
1460 "\n");
1461 return -EOVERFLOW;
1462 }
1463
1464 ret = target_check_inquiry_data(stripped);
1465
1466 if (ret < 0)
1467 return ret;
1468
1469 /*
1470 * Check to see if any active exports exist. If they do exist, fail
1471 * here as changing this information on the fly (underneath the
1472 * initiator side OS dependent multipath code) could cause negative
1473 * effects.
1474 */
1475 if (dev->export_count) {
1476 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1477 dev->export_count);
1478 return -EINVAL;
1479 }
1480
1481 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1482 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1483
1484 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1485 dev->t10_wwn.revision);
1486
1487 return count;
1488}
1489
1490static ssize_t
1491target_wwn_company_id_show(struct config_item *item,
1492 char *page)
1493{
1494 return snprintf(page, PAGE_SIZE, "%#08x\n",
1495 to_t10_wwn(item)->company_id);
1496}
1497
1498static ssize_t
1499target_wwn_company_id_store(struct config_item *item,
1500 const char *page, size_t count)
1501{
1502 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1503 struct se_device *dev = t10_wwn->t10_dev;
1504 u32 val;
1505 int ret;
1506
1507 /*
1508 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1509 * form OUI assigned by the IEEE.
1510 */
1511 ret = kstrtou32(page, 0, &val);
1512 if (ret < 0)
1513 return ret;
1514
1515 if (val >= 0x1000000)
1516 return -EOVERFLOW;
1517
1518 /*
1519 * Check to see if any active exports exist. If they do exist, fail
1520 * here as changing this information on the fly (underneath the
1521 * initiator side OS dependent multipath code) could cause negative
1522 * effects.
1523 */
1524 if (dev->export_count) {
1525 pr_err("Unable to set Company ID while %u exports exist\n",
1526 dev->export_count);
1527 return -EINVAL;
1528 }
1529
1530 t10_wwn->company_id = val;
1531
1532 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1533 t10_wwn->company_id);
1534
1535 return count;
1536}
1537
1538/*
1539 * VPD page 0x80 Unit serial
1540 */
1541static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1542 char *page)
1543{
1544 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1545 &to_t10_wwn(item)->unit_serial[0]);
1546}
1547
1548static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1549 const char *page, size_t count)
1550{
1551 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1552 struct se_device *dev = t10_wwn->t10_dev;
1553 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1554
1555 /*
1556 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1557 * from the struct scsi_device level firmware, do not allow
1558 * VPD Unit Serial to be emulated.
1559 *
1560 * Note this struct scsi_device could also be emulating VPD
1561 * information from its drivers/scsi LLD. But for now we assume
1562 * it is doing 'the right thing' wrt a world wide unique
1563 * VPD Unit Serial Number that OS dependent multipath can depend on.
1564 */
1565 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1566 pr_err("Underlying SCSI device firmware provided VPD"
1567 " Unit Serial, ignoring request\n");
1568 return -EOPNOTSUPP;
1569 }
1570
1571 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1572 pr_err("Emulated VPD Unit Serial exceeds"
1573 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1574 return -EOVERFLOW;
1575 }
1576 /*
1577 * Check to see if any active $FABRIC_MOD exports exist. If they
1578 * do exist, fail here as changing this information on the fly
1579 * (underneath the initiator side OS dependent multipath code)
1580 * could cause negative effects.
1581 */
1582 if (dev->export_count) {
1583 pr_err("Unable to set VPD Unit Serial while"
1584 " active %d $FABRIC_MOD exports exist\n",
1585 dev->export_count);
1586 return -EINVAL;
1587 }
1588
1589 /*
1590 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1591 *
1592 * Also, strip any newline added from the userspace
1593 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1594 */
1595 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1596 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1597 "%s", strstrip(buf));
1598 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1599
1600 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1601 " %s\n", dev->t10_wwn.unit_serial);
1602
1603 return count;
1604}
1605
1606/*
1607 * VPD page 0x83 Protocol Identifier
1608 */
1609static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1610 char *page)
1611{
1612 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1613 struct t10_vpd *vpd;
1614 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1615 ssize_t len = 0;
1616
1617 spin_lock(&t10_wwn->t10_vpd_lock);
1618 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1619 if (!vpd->protocol_identifier_set)
1620 continue;
1621
1622 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1623
1624 if (len + strlen(buf) >= PAGE_SIZE)
1625 break;
1626
1627 len += sprintf(page+len, "%s", buf);
1628 }
1629 spin_unlock(&t10_wwn->t10_vpd_lock);
1630
1631 return len;
1632}
1633
1634/*
1635 * Generic wrapper for dumping VPD identifiers by association.
1636 */
1637#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1638static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1639 char *page) \
1640{ \
1641 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1642 struct t10_vpd *vpd; \
1643 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1644 ssize_t len = 0; \
1645 \
1646 spin_lock(&t10_wwn->t10_vpd_lock); \
1647 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1648 if (vpd->association != _assoc) \
1649 continue; \
1650 \
1651 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1652 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1653 if (len + strlen(buf) >= PAGE_SIZE) \
1654 break; \
1655 len += sprintf(page+len, "%s", buf); \
1656 \
1657 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1658 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1659 if (len + strlen(buf) >= PAGE_SIZE) \
1660 break; \
1661 len += sprintf(page+len, "%s", buf); \
1662 \
1663 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1664 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1665 if (len + strlen(buf) >= PAGE_SIZE) \
1666 break; \
1667 len += sprintf(page+len, "%s", buf); \
1668 } \
1669 spin_unlock(&t10_wwn->t10_vpd_lock); \
1670 \
1671 return len; \
1672}
1673
1674/* VPD page 0x83 Association: Logical Unit */
1675DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1676/* VPD page 0x83 Association: Target Port */
1677DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1678/* VPD page 0x83 Association: SCSI Target Device */
1679DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1680
1681CONFIGFS_ATTR(target_wwn_, vendor_id);
1682CONFIGFS_ATTR(target_wwn_, product_id);
1683CONFIGFS_ATTR(target_wwn_, revision);
1684CONFIGFS_ATTR(target_wwn_, company_id);
1685CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1686CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1687CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1688CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1689CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1690
1691static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1692 &target_wwn_attr_vendor_id,
1693 &target_wwn_attr_product_id,
1694 &target_wwn_attr_revision,
1695 &target_wwn_attr_company_id,
1696 &target_wwn_attr_vpd_unit_serial,
1697 &target_wwn_attr_vpd_protocol_identifier,
1698 &target_wwn_attr_vpd_assoc_logical_unit,
1699 &target_wwn_attr_vpd_assoc_target_port,
1700 &target_wwn_attr_vpd_assoc_scsi_target_device,
1701 NULL,
1702};
1703
1704TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1705
1706/* End functions for struct config_item_type tb_dev_wwn_cit */
1707
1708/* Start functions for struct config_item_type tb_dev_pr_cit */
1709
1710static struct se_device *pr_to_dev(struct config_item *item)
1711{
1712 return container_of(to_config_group(item), struct se_device,
1713 dev_pr_group);
1714}
1715
1716static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1717 char *page)
1718{
1719 struct se_node_acl *se_nacl;
1720 struct t10_pr_registration *pr_reg;
1721 char i_buf[PR_REG_ISID_ID_LEN] = { };
1722
1723 pr_reg = dev->dev_pr_res_holder;
1724 if (!pr_reg)
1725 return sprintf(page, "No SPC-3 Reservation holder\n");
1726
1727 se_nacl = pr_reg->pr_reg_nacl;
1728 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1729
1730 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1731 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1732 se_nacl->initiatorname, i_buf);
1733}
1734
1735static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1736 char *page)
1737{
1738 struct se_session *sess = dev->reservation_holder;
1739 struct se_node_acl *se_nacl;
1740 ssize_t len;
1741
1742 if (sess) {
1743 se_nacl = sess->se_node_acl;
1744 len = sprintf(page,
1745 "SPC-2 Reservation: %s Initiator: %s\n",
1746 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1747 se_nacl->initiatorname);
1748 } else {
1749 len = sprintf(page, "No SPC-2 Reservation holder\n");
1750 }
1751 return len;
1752}
1753
1754static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1755{
1756 struct se_device *dev = pr_to_dev(item);
1757 int ret;
1758
1759 if (!dev->dev_attrib.emulate_pr)
1760 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1761
1762 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1763 return sprintf(page, "Passthrough\n");
1764
1765 spin_lock(&dev->dev_reservation_lock);
1766 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1767 ret = target_core_dev_pr_show_spc2_res(dev, page);
1768 else
1769 ret = target_core_dev_pr_show_spc3_res(dev, page);
1770 spin_unlock(&dev->dev_reservation_lock);
1771 return ret;
1772}
1773
1774static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1775 char *page)
1776{
1777 struct se_device *dev = pr_to_dev(item);
1778 ssize_t len = 0;
1779
1780 spin_lock(&dev->dev_reservation_lock);
1781 if (!dev->dev_pr_res_holder) {
1782 len = sprintf(page, "No SPC-3 Reservation holder\n");
1783 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1784 len = sprintf(page, "SPC-3 Reservation: All Target"
1785 " Ports registration\n");
1786 } else {
1787 len = sprintf(page, "SPC-3 Reservation: Single"
1788 " Target Port registration\n");
1789 }
1790
1791 spin_unlock(&dev->dev_reservation_lock);
1792 return len;
1793}
1794
1795static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1796 char *page)
1797{
1798 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1799}
1800
1801
1802static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1803 char *page)
1804{
1805 struct se_device *dev = pr_to_dev(item);
1806 struct se_node_acl *se_nacl;
1807 struct se_portal_group *se_tpg;
1808 struct t10_pr_registration *pr_reg;
1809 const struct target_core_fabric_ops *tfo;
1810 ssize_t len = 0;
1811
1812 spin_lock(&dev->dev_reservation_lock);
1813 pr_reg = dev->dev_pr_res_holder;
1814 if (!pr_reg) {
1815 len = sprintf(page, "No SPC-3 Reservation holder\n");
1816 goto out_unlock;
1817 }
1818
1819 se_nacl = pr_reg->pr_reg_nacl;
1820 se_tpg = se_nacl->se_tpg;
1821 tfo = se_tpg->se_tpg_tfo;
1822
1823 len += sprintf(page+len, "SPC-3 Reservation: %s"
1824 " Target Node Endpoint: %s\n", tfo->fabric_name,
1825 tfo->tpg_get_wwn(se_tpg));
1826 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1827 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1828 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1829 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1830 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1831
1832out_unlock:
1833 spin_unlock(&dev->dev_reservation_lock);
1834 return len;
1835}
1836
1837
1838static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1839 char *page)
1840{
1841 struct se_device *dev = pr_to_dev(item);
1842 const struct target_core_fabric_ops *tfo;
1843 struct t10_pr_registration *pr_reg;
1844 unsigned char buf[384];
1845 char i_buf[PR_REG_ISID_ID_LEN];
1846 ssize_t len = 0;
1847 int reg_count = 0;
1848
1849 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1850
1851 spin_lock(&dev->t10_pr.registration_lock);
1852 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1853 pr_reg_list) {
1854
1855 memset(buf, 0, 384);
1856 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1857 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1858 core_pr_dump_initiator_port(pr_reg, i_buf,
1859 PR_REG_ISID_ID_LEN);
1860 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1861 tfo->fabric_name,
1862 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1863 pr_reg->pr_res_generation);
1864
1865 if (len + strlen(buf) >= PAGE_SIZE)
1866 break;
1867
1868 len += sprintf(page+len, "%s", buf);
1869 reg_count++;
1870 }
1871 spin_unlock(&dev->t10_pr.registration_lock);
1872
1873 if (!reg_count)
1874 len += sprintf(page+len, "None\n");
1875
1876 return len;
1877}
1878
1879static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1880{
1881 struct se_device *dev = pr_to_dev(item);
1882 struct t10_pr_registration *pr_reg;
1883 ssize_t len = 0;
1884
1885 spin_lock(&dev->dev_reservation_lock);
1886 pr_reg = dev->dev_pr_res_holder;
1887 if (pr_reg) {
1888 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1889 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1890 } else {
1891 len = sprintf(page, "No SPC-3 Reservation holder\n");
1892 }
1893
1894 spin_unlock(&dev->dev_reservation_lock);
1895 return len;
1896}
1897
1898static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1899{
1900 struct se_device *dev = pr_to_dev(item);
1901
1902 if (!dev->dev_attrib.emulate_pr)
1903 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1904 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1905 return sprintf(page, "SPC_PASSTHROUGH\n");
1906 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1907 return sprintf(page, "SPC2_RESERVATIONS\n");
1908
1909 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1910}
1911
1912static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1913 char *page)
1914{
1915 struct se_device *dev = pr_to_dev(item);
1916
1917 if (!dev->dev_attrib.emulate_pr ||
1918 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1919 return 0;
1920
1921 return sprintf(page, "APTPL Bit Status: %s\n",
1922 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1923}
1924
1925static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1926 char *page)
1927{
1928 struct se_device *dev = pr_to_dev(item);
1929
1930 if (!dev->dev_attrib.emulate_pr ||
1931 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1932 return 0;
1933
1934 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1935}
1936
1937enum {
1938 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1939 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1940 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1941 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1942};
1943
1944static match_table_t tokens = {
1945 {Opt_initiator_fabric, "initiator_fabric=%s"},
1946 {Opt_initiator_node, "initiator_node=%s"},
1947 {Opt_initiator_sid, "initiator_sid=%s"},
1948 {Opt_sa_res_key, "sa_res_key=%s"},
1949 {Opt_res_holder, "res_holder=%d"},
1950 {Opt_res_type, "res_type=%d"},
1951 {Opt_res_scope, "res_scope=%d"},
1952 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1953 {Opt_mapped_lun, "mapped_lun=%u"},
1954 {Opt_target_fabric, "target_fabric=%s"},
1955 {Opt_target_node, "target_node=%s"},
1956 {Opt_tpgt, "tpgt=%d"},
1957 {Opt_port_rtpi, "port_rtpi=%d"},
1958 {Opt_target_lun, "target_lun=%u"},
1959 {Opt_err, NULL}
1960};
1961
1962static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1963 const char *page, size_t count)
1964{
1965 struct se_device *dev = pr_to_dev(item);
1966 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1967 unsigned char *t_fabric = NULL, *t_port = NULL;
1968 char *orig, *ptr, *opts;
1969 substring_t args[MAX_OPT_ARGS];
1970 unsigned long long tmp_ll;
1971 u64 sa_res_key = 0;
1972 u64 mapped_lun = 0, target_lun = 0;
1973 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1974 u16 tpgt = 0;
1975 u8 type = 0;
1976
1977 if (!dev->dev_attrib.emulate_pr ||
1978 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1979 return count;
1980 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1981 return count;
1982
1983 if (dev->export_count) {
1984 pr_debug("Unable to process APTPL metadata while"
1985 " active fabric exports exist\n");
1986 return -EINVAL;
1987 }
1988
1989 opts = kstrdup(page, GFP_KERNEL);
1990 if (!opts)
1991 return -ENOMEM;
1992
1993 orig = opts;
1994 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1995 if (!*ptr)
1996 continue;
1997
1998 token = match_token(ptr, tokens, args);
1999 switch (token) {
2000 case Opt_initiator_fabric:
2001 i_fabric = match_strdup(args);
2002 if (!i_fabric) {
2003 ret = -ENOMEM;
2004 goto out;
2005 }
2006 break;
2007 case Opt_initiator_node:
2008 i_port = match_strdup(args);
2009 if (!i_port) {
2010 ret = -ENOMEM;
2011 goto out;
2012 }
2013 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2014 pr_err("APTPL metadata initiator_node="
2015 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2016 PR_APTPL_MAX_IPORT_LEN);
2017 ret = -EINVAL;
2018 break;
2019 }
2020 break;
2021 case Opt_initiator_sid:
2022 isid = match_strdup(args);
2023 if (!isid) {
2024 ret = -ENOMEM;
2025 goto out;
2026 }
2027 if (strlen(isid) >= PR_REG_ISID_LEN) {
2028 pr_err("APTPL metadata initiator_isid"
2029 "= exceeds PR_REG_ISID_LEN: %d\n",
2030 PR_REG_ISID_LEN);
2031 ret = -EINVAL;
2032 break;
2033 }
2034 break;
2035 case Opt_sa_res_key:
2036 ret = match_u64(args, &tmp_ll);
2037 if (ret < 0) {
2038 pr_err("kstrtoull() failed for sa_res_key=\n");
2039 goto out;
2040 }
2041 sa_res_key = (u64)tmp_ll;
2042 break;
2043 /*
2044 * PR APTPL Metadata for Reservation
2045 */
2046 case Opt_res_holder:
2047 ret = match_int(args, &arg);
2048 if (ret)
2049 goto out;
2050 res_holder = arg;
2051 break;
2052 case Opt_res_type:
2053 ret = match_int(args, &arg);
2054 if (ret)
2055 goto out;
2056 type = (u8)arg;
2057 break;
2058 case Opt_res_scope:
2059 ret = match_int(args, &arg);
2060 if (ret)
2061 goto out;
2062 break;
2063 case Opt_res_all_tg_pt:
2064 ret = match_int(args, &arg);
2065 if (ret)
2066 goto out;
2067 all_tg_pt = (int)arg;
2068 break;
2069 case Opt_mapped_lun:
2070 ret = match_u64(args, &tmp_ll);
2071 if (ret)
2072 goto out;
2073 mapped_lun = (u64)tmp_ll;
2074 break;
2075 /*
2076 * PR APTPL Metadata for Target Port
2077 */
2078 case Opt_target_fabric:
2079 t_fabric = match_strdup(args);
2080 if (!t_fabric) {
2081 ret = -ENOMEM;
2082 goto out;
2083 }
2084 break;
2085 case Opt_target_node:
2086 t_port = match_strdup(args);
2087 if (!t_port) {
2088 ret = -ENOMEM;
2089 goto out;
2090 }
2091 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2092 pr_err("APTPL metadata target_node="
2093 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2094 PR_APTPL_MAX_TPORT_LEN);
2095 ret = -EINVAL;
2096 break;
2097 }
2098 break;
2099 case Opt_tpgt:
2100 ret = match_int(args, &arg);
2101 if (ret)
2102 goto out;
2103 tpgt = (u16)arg;
2104 break;
2105 case Opt_port_rtpi:
2106 ret = match_int(args, &arg);
2107 if (ret)
2108 goto out;
2109 break;
2110 case Opt_target_lun:
2111 ret = match_u64(args, &tmp_ll);
2112 if (ret)
2113 goto out;
2114 target_lun = (u64)tmp_ll;
2115 break;
2116 default:
2117 break;
2118 }
2119 }
2120
2121 if (!i_port || !t_port || !sa_res_key) {
2122 pr_err("Illegal parameters for APTPL registration\n");
2123 ret = -EINVAL;
2124 goto out;
2125 }
2126
2127 if (res_holder && !(type)) {
2128 pr_err("Illegal PR type: 0x%02x for reservation"
2129 " holder\n", type);
2130 ret = -EINVAL;
2131 goto out;
2132 }
2133
2134 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2135 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2136 res_holder, all_tg_pt, type);
2137out:
2138 kfree(i_fabric);
2139 kfree(i_port);
2140 kfree(isid);
2141 kfree(t_fabric);
2142 kfree(t_port);
2143 kfree(orig);
2144 return (ret == 0) ? count : ret;
2145}
2146
2147
2148CONFIGFS_ATTR_RO(target_pr_, res_holder);
2149CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2150CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2151CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2152CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2153CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2154CONFIGFS_ATTR_RO(target_pr_, res_type);
2155CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2156CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2157
2158static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2159 &target_pr_attr_res_holder,
2160 &target_pr_attr_res_pr_all_tgt_pts,
2161 &target_pr_attr_res_pr_generation,
2162 &target_pr_attr_res_pr_holder_tg_port,
2163 &target_pr_attr_res_pr_registered_i_pts,
2164 &target_pr_attr_res_pr_type,
2165 &target_pr_attr_res_type,
2166 &target_pr_attr_res_aptpl_active,
2167 &target_pr_attr_res_aptpl_metadata,
2168 NULL,
2169};
2170
2171TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2172
2173/* End functions for struct config_item_type tb_dev_pr_cit */
2174
2175/* Start functions for struct config_item_type tb_dev_cit */
2176
2177static inline struct se_device *to_device(struct config_item *item)
2178{
2179 return container_of(to_config_group(item), struct se_device, dev_group);
2180}
2181
2182static ssize_t target_dev_info_show(struct config_item *item, char *page)
2183{
2184 struct se_device *dev = to_device(item);
2185 int bl = 0;
2186 ssize_t read_bytes = 0;
2187
2188 transport_dump_dev_state(dev, page, &bl);
2189 read_bytes += bl;
2190 read_bytes += dev->transport->show_configfs_dev_params(dev,
2191 page+read_bytes);
2192 return read_bytes;
2193}
2194
2195static ssize_t target_dev_control_store(struct config_item *item,
2196 const char *page, size_t count)
2197{
2198 struct se_device *dev = to_device(item);
2199
2200 return dev->transport->set_configfs_dev_params(dev, page, count);
2201}
2202
2203static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2204{
2205 struct se_device *dev = to_device(item);
2206
2207 if (!(dev->dev_flags & DF_USING_ALIAS))
2208 return 0;
2209
2210 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2211}
2212
2213static ssize_t target_dev_alias_store(struct config_item *item,
2214 const char *page, size_t count)
2215{
2216 struct se_device *dev = to_device(item);
2217 struct se_hba *hba = dev->se_hba;
2218 ssize_t read_bytes;
2219
2220 if (count > (SE_DEV_ALIAS_LEN-1)) {
2221 pr_err("alias count: %d exceeds"
2222 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2223 SE_DEV_ALIAS_LEN-1);
2224 return -EINVAL;
2225 }
2226
2227 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2228 if (!read_bytes)
2229 return -EINVAL;
2230 if (dev->dev_alias[read_bytes - 1] == '\n')
2231 dev->dev_alias[read_bytes - 1] = '\0';
2232
2233 dev->dev_flags |= DF_USING_ALIAS;
2234
2235 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2236 config_item_name(&hba->hba_group.cg_item),
2237 config_item_name(&dev->dev_group.cg_item),
2238 dev->dev_alias);
2239
2240 return read_bytes;
2241}
2242
2243static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2244{
2245 struct se_device *dev = to_device(item);
2246
2247 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2248 return 0;
2249
2250 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2251}
2252
2253static ssize_t target_dev_udev_path_store(struct config_item *item,
2254 const char *page, size_t count)
2255{
2256 struct se_device *dev = to_device(item);
2257 struct se_hba *hba = dev->se_hba;
2258 ssize_t read_bytes;
2259
2260 if (count > (SE_UDEV_PATH_LEN-1)) {
2261 pr_err("udev_path count: %d exceeds"
2262 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2263 SE_UDEV_PATH_LEN-1);
2264 return -EINVAL;
2265 }
2266
2267 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2268 "%s", page);
2269 if (!read_bytes)
2270 return -EINVAL;
2271 if (dev->udev_path[read_bytes - 1] == '\n')
2272 dev->udev_path[read_bytes - 1] = '\0';
2273
2274 dev->dev_flags |= DF_USING_UDEV_PATH;
2275
2276 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2277 config_item_name(&hba->hba_group.cg_item),
2278 config_item_name(&dev->dev_group.cg_item),
2279 dev->udev_path);
2280
2281 return read_bytes;
2282}
2283
2284static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2285{
2286 struct se_device *dev = to_device(item);
2287
2288 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2289}
2290
2291static ssize_t target_dev_enable_store(struct config_item *item,
2292 const char *page, size_t count)
2293{
2294 struct se_device *dev = to_device(item);
2295 char *ptr;
2296 int ret;
2297
2298 ptr = strstr(page, "1");
2299 if (!ptr) {
2300 pr_err("For dev_enable ops, only valid value"
2301 " is \"1\"\n");
2302 return -EINVAL;
2303 }
2304
2305 ret = target_configure_device(dev);
2306 if (ret)
2307 return ret;
2308 return count;
2309}
2310
2311static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2312{
2313 struct se_device *dev = to_device(item);
2314 struct config_item *lu_ci;
2315 struct t10_alua_lu_gp *lu_gp;
2316 struct t10_alua_lu_gp_member *lu_gp_mem;
2317 ssize_t len = 0;
2318
2319 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2320 if (!lu_gp_mem)
2321 return 0;
2322
2323 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2324 lu_gp = lu_gp_mem->lu_gp;
2325 if (lu_gp) {
2326 lu_ci = &lu_gp->lu_gp_group.cg_item;
2327 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2328 config_item_name(lu_ci), lu_gp->lu_gp_id);
2329 }
2330 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2331
2332 return len;
2333}
2334
2335static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2336 const char *page, size_t count)
2337{
2338 struct se_device *dev = to_device(item);
2339 struct se_hba *hba = dev->se_hba;
2340 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2341 struct t10_alua_lu_gp_member *lu_gp_mem;
2342 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2343 int move = 0;
2344
2345 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2346 if (!lu_gp_mem)
2347 return count;
2348
2349 if (count > LU_GROUP_NAME_BUF) {
2350 pr_err("ALUA LU Group Alias too large!\n");
2351 return -EINVAL;
2352 }
2353 memcpy(buf, page, count);
2354 /*
2355 * Any ALUA logical unit alias besides "NULL" means we will be
2356 * making a new group association.
2357 */
2358 if (strcmp(strstrip(buf), "NULL")) {
2359 /*
2360 * core_alua_get_lu_gp_by_name() will increment reference to
2361 * struct t10_alua_lu_gp. This reference is released with
2362 * core_alua_get_lu_gp_by_name below().
2363 */
2364 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2365 if (!lu_gp_new)
2366 return -ENODEV;
2367 }
2368
2369 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2370 lu_gp = lu_gp_mem->lu_gp;
2371 if (lu_gp) {
2372 /*
2373 * Clearing an existing lu_gp association, and replacing
2374 * with NULL
2375 */
2376 if (!lu_gp_new) {
2377 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2378 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2379 " %hu\n",
2380 config_item_name(&hba->hba_group.cg_item),
2381 config_item_name(&dev->dev_group.cg_item),
2382 config_item_name(&lu_gp->lu_gp_group.cg_item),
2383 lu_gp->lu_gp_id);
2384
2385 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2386 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2387
2388 return count;
2389 }
2390 /*
2391 * Removing existing association of lu_gp_mem with lu_gp
2392 */
2393 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2394 move = 1;
2395 }
2396 /*
2397 * Associate lu_gp_mem with lu_gp_new.
2398 */
2399 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2400 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2401
2402 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2403 " core/alua/lu_gps/%s, ID: %hu\n",
2404 (move) ? "Moving" : "Adding",
2405 config_item_name(&hba->hba_group.cg_item),
2406 config_item_name(&dev->dev_group.cg_item),
2407 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2408 lu_gp_new->lu_gp_id);
2409
2410 core_alua_put_lu_gp_from_name(lu_gp_new);
2411 return count;
2412}
2413
2414static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2415{
2416 struct se_device *dev = to_device(item);
2417 struct t10_alua_lba_map *map;
2418 struct t10_alua_lba_map_member *mem;
2419 char *b = page;
2420 int bl = 0;
2421 char state;
2422
2423 spin_lock(&dev->t10_alua.lba_map_lock);
2424 if (!list_empty(&dev->t10_alua.lba_map_list))
2425 bl += sprintf(b + bl, "%u %u\n",
2426 dev->t10_alua.lba_map_segment_size,
2427 dev->t10_alua.lba_map_segment_multiplier);
2428 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2429 bl += sprintf(b + bl, "%llu %llu",
2430 map->lba_map_first_lba, map->lba_map_last_lba);
2431 list_for_each_entry(mem, &map->lba_map_mem_list,
2432 lba_map_mem_list) {
2433 switch (mem->lba_map_mem_alua_state) {
2434 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2435 state = 'O';
2436 break;
2437 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2438 state = 'A';
2439 break;
2440 case ALUA_ACCESS_STATE_STANDBY:
2441 state = 'S';
2442 break;
2443 case ALUA_ACCESS_STATE_UNAVAILABLE:
2444 state = 'U';
2445 break;
2446 default:
2447 state = '.';
2448 break;
2449 }
2450 bl += sprintf(b + bl, " %d:%c",
2451 mem->lba_map_mem_alua_pg_id, state);
2452 }
2453 bl += sprintf(b + bl, "\n");
2454 }
2455 spin_unlock(&dev->t10_alua.lba_map_lock);
2456 return bl;
2457}
2458
2459static ssize_t target_dev_lba_map_store(struct config_item *item,
2460 const char *page, size_t count)
2461{
2462 struct se_device *dev = to_device(item);
2463 struct t10_alua_lba_map *lba_map = NULL;
2464 struct list_head lba_list;
2465 char *map_entries, *orig, *ptr;
2466 char state;
2467 int pg_num = -1, pg;
2468 int ret = 0, num = 0, pg_id, alua_state;
2469 unsigned long start_lba = -1, end_lba = -1;
2470 unsigned long segment_size = -1, segment_mult = -1;
2471
2472 orig = map_entries = kstrdup(page, GFP_KERNEL);
2473 if (!map_entries)
2474 return -ENOMEM;
2475
2476 INIT_LIST_HEAD(&lba_list);
2477 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2478 if (!*ptr)
2479 continue;
2480
2481 if (num == 0) {
2482 if (sscanf(ptr, "%lu %lu\n",
2483 &segment_size, &segment_mult) != 2) {
2484 pr_err("Invalid line %d\n", num);
2485 ret = -EINVAL;
2486 break;
2487 }
2488 num++;
2489 continue;
2490 }
2491 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2492 pr_err("Invalid line %d\n", num);
2493 ret = -EINVAL;
2494 break;
2495 }
2496 ptr = strchr(ptr, ' ');
2497 if (!ptr) {
2498 pr_err("Invalid line %d, missing end lba\n", num);
2499 ret = -EINVAL;
2500 break;
2501 }
2502 ptr++;
2503 ptr = strchr(ptr, ' ');
2504 if (!ptr) {
2505 pr_err("Invalid line %d, missing state definitions\n",
2506 num);
2507 ret = -EINVAL;
2508 break;
2509 }
2510 ptr++;
2511 lba_map = core_alua_allocate_lba_map(&lba_list,
2512 start_lba, end_lba);
2513 if (IS_ERR(lba_map)) {
2514 ret = PTR_ERR(lba_map);
2515 break;
2516 }
2517 pg = 0;
2518 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2519 switch (state) {
2520 case 'O':
2521 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2522 break;
2523 case 'A':
2524 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2525 break;
2526 case 'S':
2527 alua_state = ALUA_ACCESS_STATE_STANDBY;
2528 break;
2529 case 'U':
2530 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2531 break;
2532 default:
2533 pr_err("Invalid ALUA state '%c'\n", state);
2534 ret = -EINVAL;
2535 goto out;
2536 }
2537
2538 ret = core_alua_allocate_lba_map_mem(lba_map,
2539 pg_id, alua_state);
2540 if (ret) {
2541 pr_err("Invalid target descriptor %d:%c "
2542 "at line %d\n",
2543 pg_id, state, num);
2544 break;
2545 }
2546 pg++;
2547 ptr = strchr(ptr, ' ');
2548 if (ptr)
2549 ptr++;
2550 else
2551 break;
2552 }
2553 if (pg_num == -1)
2554 pg_num = pg;
2555 else if (pg != pg_num) {
2556 pr_err("Only %d from %d port groups definitions "
2557 "at line %d\n", pg, pg_num, num);
2558 ret = -EINVAL;
2559 break;
2560 }
2561 num++;
2562 }
2563out:
2564 if (ret) {
2565 core_alua_free_lba_map(&lba_list);
2566 count = ret;
2567 } else
2568 core_alua_set_lba_map(dev, &lba_list,
2569 segment_size, segment_mult);
2570 kfree(orig);
2571 return count;
2572}
2573
2574CONFIGFS_ATTR_RO(target_dev_, info);
2575CONFIGFS_ATTR_WO(target_dev_, control);
2576CONFIGFS_ATTR(target_dev_, alias);
2577CONFIGFS_ATTR(target_dev_, udev_path);
2578CONFIGFS_ATTR(target_dev_, enable);
2579CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2580CONFIGFS_ATTR(target_dev_, lba_map);
2581
2582static struct configfs_attribute *target_core_dev_attrs[] = {
2583 &target_dev_attr_info,
2584 &target_dev_attr_control,
2585 &target_dev_attr_alias,
2586 &target_dev_attr_udev_path,
2587 &target_dev_attr_enable,
2588 &target_dev_attr_alua_lu_gp,
2589 &target_dev_attr_lba_map,
2590 NULL,
2591};
2592
2593static void target_core_dev_release(struct config_item *item)
2594{
2595 struct config_group *dev_cg = to_config_group(item);
2596 struct se_device *dev =
2597 container_of(dev_cg, struct se_device, dev_group);
2598
2599 target_free_device(dev);
2600}
2601
2602/*
2603 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2604 * within target_fabric_port_link()
2605 */
2606struct configfs_item_operations target_core_dev_item_ops = {
2607 .release = target_core_dev_release,
2608};
2609
2610TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2611
2612/* End functions for struct config_item_type tb_dev_cit */
2613
2614/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2615
2616static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2617{
2618 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2619 lu_gp_group);
2620}
2621
2622static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2623{
2624 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2625
2626 if (!lu_gp->lu_gp_valid_id)
2627 return 0;
2628 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2629}
2630
2631static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2632 const char *page, size_t count)
2633{
2634 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2635 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2636 unsigned long lu_gp_id;
2637 int ret;
2638
2639 ret = kstrtoul(page, 0, &lu_gp_id);
2640 if (ret < 0) {
2641 pr_err("kstrtoul() returned %d for"
2642 " lu_gp_id\n", ret);
2643 return ret;
2644 }
2645 if (lu_gp_id > 0x0000ffff) {
2646 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2647 " 0x0000ffff\n", lu_gp_id);
2648 return -EINVAL;
2649 }
2650
2651 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2652 if (ret < 0)
2653 return -EINVAL;
2654
2655 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2656 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2657 config_item_name(&alua_lu_gp_cg->cg_item),
2658 lu_gp->lu_gp_id);
2659
2660 return count;
2661}
2662
2663static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2664{
2665 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2666 struct se_device *dev;
2667 struct se_hba *hba;
2668 struct t10_alua_lu_gp_member *lu_gp_mem;
2669 ssize_t len = 0, cur_len;
2670 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2671
2672 spin_lock(&lu_gp->lu_gp_lock);
2673 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2674 dev = lu_gp_mem->lu_gp_mem_dev;
2675 hba = dev->se_hba;
2676
2677 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2678 config_item_name(&hba->hba_group.cg_item),
2679 config_item_name(&dev->dev_group.cg_item));
2680 cur_len++; /* Extra byte for NULL terminator */
2681
2682 if ((cur_len + len) > PAGE_SIZE) {
2683 pr_warn("Ran out of lu_gp_show_attr"
2684 "_members buffer\n");
2685 break;
2686 }
2687 memcpy(page+len, buf, cur_len);
2688 len += cur_len;
2689 }
2690 spin_unlock(&lu_gp->lu_gp_lock);
2691
2692 return len;
2693}
2694
2695CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2696CONFIGFS_ATTR_RO(target_lu_gp_, members);
2697
2698static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2699 &target_lu_gp_attr_lu_gp_id,
2700 &target_lu_gp_attr_members,
2701 NULL,
2702};
2703
2704static void target_core_alua_lu_gp_release(struct config_item *item)
2705{
2706 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2707 struct t10_alua_lu_gp, lu_gp_group);
2708
2709 core_alua_free_lu_gp(lu_gp);
2710}
2711
2712static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2713 .release = target_core_alua_lu_gp_release,
2714};
2715
2716static const struct config_item_type target_core_alua_lu_gp_cit = {
2717 .ct_item_ops = &target_core_alua_lu_gp_ops,
2718 .ct_attrs = target_core_alua_lu_gp_attrs,
2719 .ct_owner = THIS_MODULE,
2720};
2721
2722/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2723
2724/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2725
2726static struct config_group *target_core_alua_create_lu_gp(
2727 struct config_group *group,
2728 const char *name)
2729{
2730 struct t10_alua_lu_gp *lu_gp;
2731 struct config_group *alua_lu_gp_cg = NULL;
2732 struct config_item *alua_lu_gp_ci = NULL;
2733
2734 lu_gp = core_alua_allocate_lu_gp(name, 0);
2735 if (IS_ERR(lu_gp))
2736 return NULL;
2737
2738 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2739 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2740
2741 config_group_init_type_name(alua_lu_gp_cg, name,
2742 &target_core_alua_lu_gp_cit);
2743
2744 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2745 " Group: core/alua/lu_gps/%s\n",
2746 config_item_name(alua_lu_gp_ci));
2747
2748 return alua_lu_gp_cg;
2749
2750}
2751
2752static void target_core_alua_drop_lu_gp(
2753 struct config_group *group,
2754 struct config_item *item)
2755{
2756 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2757 struct t10_alua_lu_gp, lu_gp_group);
2758
2759 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2760 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2761 config_item_name(item), lu_gp->lu_gp_id);
2762 /*
2763 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2764 * -> target_core_alua_lu_gp_release()
2765 */
2766 config_item_put(item);
2767}
2768
2769static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2770 .make_group = &target_core_alua_create_lu_gp,
2771 .drop_item = &target_core_alua_drop_lu_gp,
2772};
2773
2774static const struct config_item_type target_core_alua_lu_gps_cit = {
2775 .ct_item_ops = NULL,
2776 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2777 .ct_owner = THIS_MODULE,
2778};
2779
2780/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2781
2782/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2783
2784static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2785{
2786 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2787 tg_pt_gp_group);
2788}
2789
2790static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2791 char *page)
2792{
2793 return sprintf(page, "%d\n",
2794 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2795}
2796
2797static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2798 const char *page, size_t count)
2799{
2800 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2801 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2802 unsigned long tmp;
2803 int new_state, ret;
2804
2805 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2806 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2807 return -EINVAL;
2808 }
2809 if (!target_dev_configured(dev)) {
2810 pr_err("Unable to set alua_access_state while device is"
2811 " not configured\n");
2812 return -ENODEV;
2813 }
2814
2815 ret = kstrtoul(page, 0, &tmp);
2816 if (ret < 0) {
2817 pr_err("Unable to extract new ALUA access state from"
2818 " %s\n", page);
2819 return ret;
2820 }
2821 new_state = (int)tmp;
2822
2823 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2824 pr_err("Unable to process implicit configfs ALUA"
2825 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2826 return -EINVAL;
2827 }
2828 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2829 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2830 /* LBA DEPENDENT is only allowed with implicit ALUA */
2831 pr_err("Unable to process implicit configfs ALUA transition"
2832 " while explicit ALUA management is enabled\n");
2833 return -EINVAL;
2834 }
2835
2836 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2837 NULL, NULL, new_state, 0);
2838 return (!ret) ? count : -EINVAL;
2839}
2840
2841static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2842 char *page)
2843{
2844 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2845 return sprintf(page, "%s\n",
2846 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2847}
2848
2849static ssize_t target_tg_pt_gp_alua_access_status_store(
2850 struct config_item *item, const char *page, size_t count)
2851{
2852 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2853 unsigned long tmp;
2854 int new_status, ret;
2855
2856 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2857 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2858 return -EINVAL;
2859 }
2860
2861 ret = kstrtoul(page, 0, &tmp);
2862 if (ret < 0) {
2863 pr_err("Unable to extract new ALUA access status"
2864 " from %s\n", page);
2865 return ret;
2866 }
2867 new_status = (int)tmp;
2868
2869 if ((new_status != ALUA_STATUS_NONE) &&
2870 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2871 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2872 pr_err("Illegal ALUA access status: 0x%02x\n",
2873 new_status);
2874 return -EINVAL;
2875 }
2876
2877 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2878 return count;
2879}
2880
2881static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2882 char *page)
2883{
2884 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2885}
2886
2887static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2888 const char *page, size_t count)
2889{
2890 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2891}
2892
2893#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2894static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2895 struct config_item *item, char *p) \
2896{ \
2897 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2898 return sprintf(p, "%d\n", \
2899 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2900} \
2901 \
2902static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2903 struct config_item *item, const char *p, size_t c) \
2904{ \
2905 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2906 unsigned long tmp; \
2907 int ret; \
2908 \
2909 if (!t->tg_pt_gp_valid_id) { \
2910 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2911 return -EINVAL; \
2912 } \
2913 \
2914 ret = kstrtoul(p, 0, &tmp); \
2915 if (ret < 0) { \
2916 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2917 return -EINVAL; \
2918 } \
2919 if (tmp > 1) { \
2920 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2921 return -EINVAL; \
2922 } \
2923 if (tmp) \
2924 t->tg_pt_gp_alua_supported_states |= _bit; \
2925 else \
2926 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2927 \
2928 return c; \
2929}
2930
2931ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2932ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2933ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2934ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2935ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2936ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2937ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2938
2939static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2940 struct config_item *item, char *page)
2941{
2942 return sprintf(page, "%d\n",
2943 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2944}
2945
2946static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2947 struct config_item *item, const char *page, size_t count)
2948{
2949 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2950 unsigned long tmp;
2951 int ret;
2952
2953 ret = kstrtoul(page, 0, &tmp);
2954 if (ret < 0) {
2955 pr_err("Unable to extract alua_write_metadata\n");
2956 return ret;
2957 }
2958
2959 if ((tmp != 0) && (tmp != 1)) {
2960 pr_err("Illegal value for alua_write_metadata:"
2961 " %lu\n", tmp);
2962 return -EINVAL;
2963 }
2964 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2965
2966 return count;
2967}
2968
2969static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2970 char *page)
2971{
2972 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2973}
2974
2975static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2976 const char *page, size_t count)
2977{
2978 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2979 count);
2980}
2981
2982static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2983 char *page)
2984{
2985 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2986}
2987
2988static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2989 const char *page, size_t count)
2990{
2991 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2992 count);
2993}
2994
2995static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2996 struct config_item *item, char *page)
2997{
2998 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2999}
3000
3001static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3002 struct config_item *item, const char *page, size_t count)
3003{
3004 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3005 count);
3006}
3007
3008static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3009 char *page)
3010{
3011 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3012}
3013
3014static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3015 const char *page, size_t count)
3016{
3017 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3018}
3019
3020static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3021 char *page)
3022{
3023 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3024
3025 if (!tg_pt_gp->tg_pt_gp_valid_id)
3026 return 0;
3027 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3028}
3029
3030static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3031 const char *page, size_t count)
3032{
3033 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3034 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3035 unsigned long tg_pt_gp_id;
3036 int ret;
3037
3038 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3039 if (ret < 0) {
3040 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3041 page);
3042 return ret;
3043 }
3044 if (tg_pt_gp_id > 0x0000ffff) {
3045 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3046 tg_pt_gp_id);
3047 return -EINVAL;
3048 }
3049
3050 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3051 if (ret < 0)
3052 return -EINVAL;
3053
3054 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3055 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3056 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3057 tg_pt_gp->tg_pt_gp_id);
3058
3059 return count;
3060}
3061
3062static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3063 char *page)
3064{
3065 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3066 struct se_lun *lun;
3067 ssize_t len = 0, cur_len;
3068 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3069
3070 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3071 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3072 lun_tg_pt_gp_link) {
3073 struct se_portal_group *tpg = lun->lun_tpg;
3074
3075 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3076 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3077 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3078 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3079 config_item_name(&lun->lun_group.cg_item));
3080 cur_len++; /* Extra byte for NULL terminator */
3081
3082 if ((cur_len + len) > PAGE_SIZE) {
3083 pr_warn("Ran out of lu_gp_show_attr"
3084 "_members buffer\n");
3085 break;
3086 }
3087 memcpy(page+len, buf, cur_len);
3088 len += cur_len;
3089 }
3090 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3091
3092 return len;
3093}
3094
3095CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3096CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3097CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3098CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3099CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3100CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3101CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3102CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3103CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3104CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3105CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3106CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3107CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3108CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3109CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3110CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3111CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3112
3113static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3114 &target_tg_pt_gp_attr_alua_access_state,
3115 &target_tg_pt_gp_attr_alua_access_status,
3116 &target_tg_pt_gp_attr_alua_access_type,
3117 &target_tg_pt_gp_attr_alua_support_transitioning,
3118 &target_tg_pt_gp_attr_alua_support_offline,
3119 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3120 &target_tg_pt_gp_attr_alua_support_unavailable,
3121 &target_tg_pt_gp_attr_alua_support_standby,
3122 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3123 &target_tg_pt_gp_attr_alua_support_active_optimized,
3124 &target_tg_pt_gp_attr_alua_write_metadata,
3125 &target_tg_pt_gp_attr_nonop_delay_msecs,
3126 &target_tg_pt_gp_attr_trans_delay_msecs,
3127 &target_tg_pt_gp_attr_implicit_trans_secs,
3128 &target_tg_pt_gp_attr_preferred,
3129 &target_tg_pt_gp_attr_tg_pt_gp_id,
3130 &target_tg_pt_gp_attr_members,
3131 NULL,
3132};
3133
3134static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3135{
3136 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3137 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3138
3139 core_alua_free_tg_pt_gp(tg_pt_gp);
3140}
3141
3142static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3143 .release = target_core_alua_tg_pt_gp_release,
3144};
3145
3146static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3147 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3148 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3149 .ct_owner = THIS_MODULE,
3150};
3151
3152/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3153
3154/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3155
3156static struct config_group *target_core_alua_create_tg_pt_gp(
3157 struct config_group *group,
3158 const char *name)
3159{
3160 struct t10_alua *alua = container_of(group, struct t10_alua,
3161 alua_tg_pt_gps_group);
3162 struct t10_alua_tg_pt_gp *tg_pt_gp;
3163 struct config_group *alua_tg_pt_gp_cg = NULL;
3164 struct config_item *alua_tg_pt_gp_ci = NULL;
3165
3166 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3167 if (!tg_pt_gp)
3168 return NULL;
3169
3170 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3171 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3172
3173 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3174 &target_core_alua_tg_pt_gp_cit);
3175
3176 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3177 " Group: alua/tg_pt_gps/%s\n",
3178 config_item_name(alua_tg_pt_gp_ci));
3179
3180 return alua_tg_pt_gp_cg;
3181}
3182
3183static void target_core_alua_drop_tg_pt_gp(
3184 struct config_group *group,
3185 struct config_item *item)
3186{
3187 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3188 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3189
3190 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3191 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3192 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3193 /*
3194 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3195 * -> target_core_alua_tg_pt_gp_release().
3196 */
3197 config_item_put(item);
3198}
3199
3200static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3201 .make_group = &target_core_alua_create_tg_pt_gp,
3202 .drop_item = &target_core_alua_drop_tg_pt_gp,
3203};
3204
3205TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3206
3207/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3208
3209/* Start functions for struct config_item_type target_core_alua_cit */
3210
3211/*
3212 * target_core_alua_cit is a ConfigFS group that lives under
3213 * /sys/kernel/config/target/core/alua. There are default groups
3214 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3215 * target_core_alua_cit in target_core_init_configfs() below.
3216 */
3217static const struct config_item_type target_core_alua_cit = {
3218 .ct_item_ops = NULL,
3219 .ct_attrs = NULL,
3220 .ct_owner = THIS_MODULE,
3221};
3222
3223/* End functions for struct config_item_type target_core_alua_cit */
3224
3225/* Start functions for struct config_item_type tb_dev_stat_cit */
3226
3227static struct config_group *target_core_stat_mkdir(
3228 struct config_group *group,
3229 const char *name)
3230{
3231 return ERR_PTR(-ENOSYS);
3232}
3233
3234static void target_core_stat_rmdir(
3235 struct config_group *group,
3236 struct config_item *item)
3237{
3238 return;
3239}
3240
3241static struct configfs_group_operations target_core_stat_group_ops = {
3242 .make_group = &target_core_stat_mkdir,
3243 .drop_item = &target_core_stat_rmdir,
3244};
3245
3246TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3247
3248/* End functions for struct config_item_type tb_dev_stat_cit */
3249
3250/* Start functions for struct config_item_type target_core_hba_cit */
3251
3252static struct config_group *target_core_make_subdev(
3253 struct config_group *group,
3254 const char *name)
3255{
3256 struct t10_alua_tg_pt_gp *tg_pt_gp;
3257 struct config_item *hba_ci = &group->cg_item;
3258 struct se_hba *hba = item_to_hba(hba_ci);
3259 struct target_backend *tb = hba->backend;
3260 struct se_device *dev;
3261 int errno = -ENOMEM, ret;
3262
3263 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3264 if (ret)
3265 return ERR_PTR(ret);
3266
3267 dev = target_alloc_device(hba, name);
3268 if (!dev)
3269 goto out_unlock;
3270
3271 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3272
3273 config_group_init_type_name(&dev->dev_action_group, "action",
3274 &tb->tb_dev_action_cit);
3275 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3276
3277 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3278 &tb->tb_dev_attrib_cit);
3279 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3280
3281 config_group_init_type_name(&dev->dev_pr_group, "pr",
3282 &tb->tb_dev_pr_cit);
3283 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3284
3285 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3286 &tb->tb_dev_wwn_cit);
3287 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3288 &dev->dev_group);
3289
3290 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3291 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3292 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3293 &dev->dev_group);
3294
3295 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3296 "statistics", &tb->tb_dev_stat_cit);
3297 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3298 &dev->dev_group);
3299
3300 /*
3301 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3302 */
3303 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3304 if (!tg_pt_gp)
3305 goto out_free_device;
3306 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3307
3308 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3309 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3310 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3311 &dev->t10_alua.alua_tg_pt_gps_group);
3312
3313 /*
3314 * Add core/$HBA/$DEV/statistics/ default groups
3315 */
3316 target_stat_setup_dev_default_groups(dev);
3317
3318 mutex_unlock(&hba->hba_access_mutex);
3319 return &dev->dev_group;
3320
3321out_free_device:
3322 target_free_device(dev);
3323out_unlock:
3324 mutex_unlock(&hba->hba_access_mutex);
3325 return ERR_PTR(errno);
3326}
3327
3328static void target_core_drop_subdev(
3329 struct config_group *group,
3330 struct config_item *item)
3331{
3332 struct config_group *dev_cg = to_config_group(item);
3333 struct se_device *dev =
3334 container_of(dev_cg, struct se_device, dev_group);
3335 struct se_hba *hba;
3336
3337 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3338
3339 mutex_lock(&hba->hba_access_mutex);
3340
3341 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3342 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3343
3344 /*
3345 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3346 * directly from target_core_alua_tg_pt_gp_release().
3347 */
3348 dev->t10_alua.default_tg_pt_gp = NULL;
3349
3350 configfs_remove_default_groups(dev_cg);
3351
3352 /*
3353 * se_dev is released from target_core_dev_item_ops->release()
3354 */
3355 config_item_put(item);
3356 mutex_unlock(&hba->hba_access_mutex);
3357}
3358
3359static struct configfs_group_operations target_core_hba_group_ops = {
3360 .make_group = target_core_make_subdev,
3361 .drop_item = target_core_drop_subdev,
3362};
3363
3364
3365static inline struct se_hba *to_hba(struct config_item *item)
3366{
3367 return container_of(to_config_group(item), struct se_hba, hba_group);
3368}
3369
3370static ssize_t target_hba_info_show(struct config_item *item, char *page)
3371{
3372 struct se_hba *hba = to_hba(item);
3373
3374 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3375 hba->hba_id, hba->backend->ops->name,
3376 TARGET_CORE_VERSION);
3377}
3378
3379static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3380{
3381 struct se_hba *hba = to_hba(item);
3382 int hba_mode = 0;
3383
3384 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3385 hba_mode = 1;
3386
3387 return sprintf(page, "%d\n", hba_mode);
3388}
3389
3390static ssize_t target_hba_mode_store(struct config_item *item,
3391 const char *page, size_t count)
3392{
3393 struct se_hba *hba = to_hba(item);
3394 unsigned long mode_flag;
3395 int ret;
3396
3397 if (hba->backend->ops->pmode_enable_hba == NULL)
3398 return -EINVAL;
3399
3400 ret = kstrtoul(page, 0, &mode_flag);
3401 if (ret < 0) {
3402 pr_err("Unable to extract hba mode flag: %d\n", ret);
3403 return ret;
3404 }
3405
3406 if (hba->dev_count) {
3407 pr_err("Unable to set hba_mode with active devices\n");
3408 return -EINVAL;
3409 }
3410
3411 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3412 if (ret < 0)
3413 return -EINVAL;
3414 if (ret > 0)
3415 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3416 else if (ret == 0)
3417 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3418
3419 return count;
3420}
3421
3422CONFIGFS_ATTR_RO(target_, hba_info);
3423CONFIGFS_ATTR(target_, hba_mode);
3424
3425static void target_core_hba_release(struct config_item *item)
3426{
3427 struct se_hba *hba = container_of(to_config_group(item),
3428 struct se_hba, hba_group);
3429 core_delete_hba(hba);
3430}
3431
3432static struct configfs_attribute *target_core_hba_attrs[] = {
3433 &target_attr_hba_info,
3434 &target_attr_hba_mode,
3435 NULL,
3436};
3437
3438static struct configfs_item_operations target_core_hba_item_ops = {
3439 .release = target_core_hba_release,
3440};
3441
3442static const struct config_item_type target_core_hba_cit = {
3443 .ct_item_ops = &target_core_hba_item_ops,
3444 .ct_group_ops = &target_core_hba_group_ops,
3445 .ct_attrs = target_core_hba_attrs,
3446 .ct_owner = THIS_MODULE,
3447};
3448
3449static struct config_group *target_core_call_addhbatotarget(
3450 struct config_group *group,
3451 const char *name)
3452{
3453 char *se_plugin_str, *str, *str2;
3454 struct se_hba *hba;
3455 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3456 unsigned long plugin_dep_id = 0;
3457 int ret;
3458
3459 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3460 pr_err("Passed *name strlen(): %d exceeds"
3461 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3462 TARGET_CORE_NAME_MAX_LEN);
3463 return ERR_PTR(-ENAMETOOLONG);
3464 }
3465 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3466
3467 str = strstr(buf, "_");
3468 if (!str) {
3469 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3470 return ERR_PTR(-EINVAL);
3471 }
3472 se_plugin_str = buf;
3473 /*
3474 * Special case for subsystem plugins that have "_" in their names.
3475 * Namely rd_direct and rd_mcp..
3476 */
3477 str2 = strstr(str+1, "_");
3478 if (str2) {
3479 *str2 = '\0'; /* Terminate for *se_plugin_str */
3480 str2++; /* Skip to start of plugin dependent ID */
3481 str = str2;
3482 } else {
3483 *str = '\0'; /* Terminate for *se_plugin_str */
3484 str++; /* Skip to start of plugin dependent ID */
3485 }
3486
3487 ret = kstrtoul(str, 0, &plugin_dep_id);
3488 if (ret < 0) {
3489 pr_err("kstrtoul() returned %d for"
3490 " plugin_dep_id\n", ret);
3491 return ERR_PTR(ret);
3492 }
3493 /*
3494 * Load up TCM subsystem plugins if they have not already been loaded.
3495 */
3496 transport_subsystem_check_init();
3497
3498 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3499 if (IS_ERR(hba))
3500 return ERR_CAST(hba);
3501
3502 config_group_init_type_name(&hba->hba_group, name,
3503 &target_core_hba_cit);
3504
3505 return &hba->hba_group;
3506}
3507
3508static void target_core_call_delhbafromtarget(
3509 struct config_group *group,
3510 struct config_item *item)
3511{
3512 /*
3513 * core_delete_hba() is called from target_core_hba_item_ops->release()
3514 * -> target_core_hba_release()
3515 */
3516 config_item_put(item);
3517}
3518
3519static struct configfs_group_operations target_core_group_ops = {
3520 .make_group = target_core_call_addhbatotarget,
3521 .drop_item = target_core_call_delhbafromtarget,
3522};
3523
3524static const struct config_item_type target_core_cit = {
3525 .ct_item_ops = NULL,
3526 .ct_group_ops = &target_core_group_ops,
3527 .ct_attrs = NULL,
3528 .ct_owner = THIS_MODULE,
3529};
3530
3531/* Stop functions for struct config_item_type target_core_hba_cit */
3532
3533void target_setup_backend_cits(struct target_backend *tb)
3534{
3535 target_core_setup_dev_cit(tb);
3536 target_core_setup_dev_action_cit(tb);
3537 target_core_setup_dev_attrib_cit(tb);
3538 target_core_setup_dev_pr_cit(tb);
3539 target_core_setup_dev_wwn_cit(tb);
3540 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3541 target_core_setup_dev_stat_cit(tb);
3542}
3543
3544static void target_init_dbroot(void)
3545{
3546 struct file *fp;
3547
3548 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3549 fp = filp_open(db_root_stage, O_RDONLY, 0);
3550 if (IS_ERR(fp)) {
3551 pr_err("db_root: cannot open: %s\n", db_root_stage);
3552 return;
3553 }
3554 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3555 filp_close(fp, NULL);
3556 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3557 return;
3558 }
3559 filp_close(fp, NULL);
3560
3561 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3562 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3563}
3564
3565static int __init target_core_init_configfs(void)
3566{
3567 struct configfs_subsystem *subsys = &target_core_fabrics;
3568 struct t10_alua_lu_gp *lu_gp;
3569 int ret;
3570
3571 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3572 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3573 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3574
3575 config_group_init(&subsys->su_group);
3576 mutex_init(&subsys->su_mutex);
3577
3578 ret = init_se_kmem_caches();
3579 if (ret < 0)
3580 return ret;
3581 /*
3582 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3583 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3584 */
3585 config_group_init_type_name(&target_core_hbagroup, "core",
3586 &target_core_cit);
3587 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3588
3589 /*
3590 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3591 */
3592 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3593 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3594
3595 /*
3596 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3597 * groups under /sys/kernel/config/target/core/alua/
3598 */
3599 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3600 &target_core_alua_lu_gps_cit);
3601 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3602
3603 /*
3604 * Add core/alua/lu_gps/default_lu_gp
3605 */
3606 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3607 if (IS_ERR(lu_gp)) {
3608 ret = -ENOMEM;
3609 goto out_global;
3610 }
3611
3612 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3613 &target_core_alua_lu_gp_cit);
3614 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3615
3616 default_lu_gp = lu_gp;
3617
3618 /*
3619 * Register the target_core_mod subsystem with configfs.
3620 */
3621 ret = configfs_register_subsystem(subsys);
3622 if (ret < 0) {
3623 pr_err("Error %d while registering subsystem %s\n",
3624 ret, subsys->su_group.cg_item.ci_namebuf);
3625 goto out_global;
3626 }
3627 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3628 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3629 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3630 /*
3631 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3632 */
3633 ret = rd_module_init();
3634 if (ret < 0)
3635 goto out;
3636
3637 ret = core_dev_setup_virtual_lun0();
3638 if (ret < 0)
3639 goto out;
3640
3641 ret = target_xcopy_setup_pt();
3642 if (ret < 0)
3643 goto out;
3644
3645 target_init_dbroot();
3646
3647 return 0;
3648
3649out:
3650 configfs_unregister_subsystem(subsys);
3651 core_dev_release_virtual_lun0();
3652 rd_module_exit();
3653out_global:
3654 if (default_lu_gp) {
3655 core_alua_free_lu_gp(default_lu_gp);
3656 default_lu_gp = NULL;
3657 }
3658 release_se_kmem_caches();
3659 return ret;
3660}
3661
3662static void __exit target_core_exit_configfs(void)
3663{
3664 configfs_remove_default_groups(&alua_lu_gps_group);
3665 configfs_remove_default_groups(&alua_group);
3666 configfs_remove_default_groups(&target_core_hbagroup);
3667
3668 /*
3669 * We expect subsys->su_group.default_groups to be released
3670 * by configfs subsystem provider logic..
3671 */
3672 configfs_unregister_subsystem(&target_core_fabrics);
3673
3674 core_alua_free_lu_gp(default_lu_gp);
3675 default_lu_gp = NULL;
3676
3677 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3678 " Infrastructure\n");
3679
3680 core_dev_release_virtual_lun0();
3681 rd_module_exit();
3682 target_xcopy_release_pt();
3683 release_se_kmem_caches();
3684}
3685
3686MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3687MODULE_AUTHOR("nab@Linux-iSCSI.org");
3688MODULE_LICENSE("GPL");
3689
3690module_init(target_core_init_configfs);
3691module_exit(target_core_exit_configfs);