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