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1/*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * Copyright (c) 2008-2011 Rising Tide Systems
7 * Copyright (c) 2008-2011 Linux-iSCSI.org
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 ****************************************************************************/
23
24#include <linux/module.h>
25#include <linux/moduleparam.h>
26#include <linux/version.h>
27#include <generated/utsrelease.h>
28#include <linux/utsname.h>
29#include <linux/init.h>
30#include <linux/fs.h>
31#include <linux/namei.h>
32#include <linux/slab.h>
33#include <linux/types.h>
34#include <linux/delay.h>
35#include <linux/unistd.h>
36#include <linux/string.h>
37#include <linux/parser.h>
38#include <linux/syscalls.h>
39#include <linux/configfs.h>
40#include <linux/spinlock.h>
41
42#include <target/target_core_base.h>
43#include <target/target_core_device.h>
44#include <target/target_core_transport.h>
45#include <target/target_core_fabric_ops.h>
46#include <target/target_core_fabric_configfs.h>
47#include <target/target_core_configfs.h>
48#include <target/configfs_macros.h>
49
50#include "target_core_alua.h"
51#include "target_core_hba.h"
52#include "target_core_pr.h"
53#include "target_core_rd.h"
54#include "target_core_stat.h"
55
56extern struct t10_alua_lu_gp *default_lu_gp;
57
58static struct list_head g_tf_list;
59static struct mutex g_tf_lock;
60
61struct target_core_configfs_attribute {
62 struct configfs_attribute attr;
63 ssize_t (*show)(void *, char *);
64 ssize_t (*store)(void *, const char *, size_t);
65};
66
67static struct config_group target_core_hbagroup;
68static struct config_group alua_group;
69static struct config_group alua_lu_gps_group;
70
71static DEFINE_SPINLOCK(se_device_lock);
72static LIST_HEAD(se_dev_list);
73
74static inline struct se_hba *
75item_to_hba(struct config_item *item)
76{
77 return container_of(to_config_group(item), struct se_hba, hba_group);
78}
79
80/*
81 * Attributes for /sys/kernel/config/target/
82 */
83static ssize_t target_core_attr_show(struct config_item *item,
84 struct configfs_attribute *attr,
85 char *page)
86{
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
89 utsname()->sysname, utsname()->machine);
90}
91
92static struct configfs_item_operations target_core_fabric_item_ops = {
93 .show_attribute = target_core_attr_show,
94};
95
96static struct configfs_attribute target_core_item_attr_version = {
97 .ca_owner = THIS_MODULE,
98 .ca_name = "version",
99 .ca_mode = S_IRUGO,
100};
101
102static struct target_fabric_configfs *target_core_get_fabric(
103 const char *name)
104{
105 struct target_fabric_configfs *tf;
106
107 if (!name)
108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
112 if (!strcmp(tf->tf_name, name)) {
113 atomic_inc(&tf->tf_access_cnt);
114 mutex_unlock(&g_tf_lock);
115 return tf;
116 }
117 }
118 mutex_unlock(&g_tf_lock);
119
120 return NULL;
121}
122
123/*
124 * Called from struct target_core_group_ops->make_group()
125 */
126static struct config_group *target_core_register_fabric(
127 struct config_group *group,
128 const char *name)
129{
130 struct target_fabric_configfs *tf;
131 int ret;
132
133 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
134 " %s\n", group, name);
135 /*
136 * Ensure that TCM subsystem plugins are loaded at this point for
137 * using the RAMDISK_DR virtual LUN 0 and all other struct se_port
138 * LUN symlinks.
139 */
140 if (transport_subsystem_check_init() < 0)
141 return ERR_PTR(-EINVAL);
142
143 /*
144 * Below are some hardcoded request_module() calls to automatically
145 * local fabric modules when the following is called:
146 *
147 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
148 *
149 * Note that this does not limit which TCM fabric module can be
150 * registered, but simply provids auto loading logic for modules with
151 * mkdir(2) system calls with known TCM fabric modules.
152 */
153 if (!strncmp(name, "iscsi", 5)) {
154 /*
155 * Automatically load the LIO Target fabric module when the
156 * following is called:
157 *
158 * mkdir -p $CONFIGFS/target/iscsi
159 */
160 ret = request_module("iscsi_target_mod");
161 if (ret < 0) {
162 pr_err("request_module() failed for"
163 " iscsi_target_mod.ko: %d\n", ret);
164 return ERR_PTR(-EINVAL);
165 }
166 } else if (!strncmp(name, "loopback", 8)) {
167 /*
168 * Automatically load the tcm_loop fabric module when the
169 * following is called:
170 *
171 * mkdir -p $CONFIGFS/target/loopback
172 */
173 ret = request_module("tcm_loop");
174 if (ret < 0) {
175 pr_err("request_module() failed for"
176 " tcm_loop.ko: %d\n", ret);
177 return ERR_PTR(-EINVAL);
178 }
179 }
180
181 tf = target_core_get_fabric(name);
182 if (!tf) {
183 pr_err("target_core_get_fabric() failed for %s\n",
184 name);
185 return ERR_PTR(-EINVAL);
186 }
187 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
188 " %s\n", tf->tf_name);
189 /*
190 * On a successful target_core_get_fabric() look, the returned
191 * struct target_fabric_configfs *tf will contain a usage reference.
192 */
193 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
194 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
195
196 tf->tf_group.default_groups = tf->tf_default_groups;
197 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
198 tf->tf_group.default_groups[1] = NULL;
199
200 config_group_init_type_name(&tf->tf_group, name,
201 &TF_CIT_TMPL(tf)->tfc_wwn_cit);
202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
203 &TF_CIT_TMPL(tf)->tfc_discovery_cit);
204
205 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
206 " %s\n", tf->tf_group.cg_item.ci_name);
207 /*
208 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
209 */
210 tf->tf_ops.tf_subsys = tf->tf_subsys;
211 tf->tf_fabric = &tf->tf_group.cg_item;
212 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
213 " for %s\n", name);
214
215 return &tf->tf_group;
216}
217
218/*
219 * Called from struct target_core_group_ops->drop_item()
220 */
221static void target_core_deregister_fabric(
222 struct config_group *group,
223 struct config_item *item)
224{
225 struct target_fabric_configfs *tf = container_of(
226 to_config_group(item), struct target_fabric_configfs, tf_group);
227 struct config_group *tf_group;
228 struct config_item *df_item;
229 int i;
230
231 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
232 " tf list\n", config_item_name(item));
233
234 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
235 " %s\n", tf->tf_name);
236 atomic_dec(&tf->tf_access_cnt);
237
238 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
239 " tf->tf_fabric for %s\n", tf->tf_name);
240 tf->tf_fabric = NULL;
241
242 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
243 " %s\n", config_item_name(item));
244
245 tf_group = &tf->tf_group;
246 for (i = 0; tf_group->default_groups[i]; i++) {
247 df_item = &tf_group->default_groups[i]->cg_item;
248 tf_group->default_groups[i] = NULL;
249 config_item_put(df_item);
250 }
251 config_item_put(item);
252}
253
254static struct configfs_group_operations target_core_fabric_group_ops = {
255 .make_group = &target_core_register_fabric,
256 .drop_item = &target_core_deregister_fabric,
257};
258
259/*
260 * All item attributes appearing in /sys/kernel/target/ appear here.
261 */
262static struct configfs_attribute *target_core_fabric_item_attrs[] = {
263 &target_core_item_attr_version,
264 NULL,
265};
266
267/*
268 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
269 */
270static struct config_item_type target_core_fabrics_item = {
271 .ct_item_ops = &target_core_fabric_item_ops,
272 .ct_group_ops = &target_core_fabric_group_ops,
273 .ct_attrs = target_core_fabric_item_attrs,
274 .ct_owner = THIS_MODULE,
275};
276
277static struct configfs_subsystem target_core_fabrics = {
278 .su_group = {
279 .cg_item = {
280 .ci_namebuf = "target",
281 .ci_type = &target_core_fabrics_item,
282 },
283 },
284};
285
286static struct configfs_subsystem *target_core_subsystem[] = {
287 &target_core_fabrics,
288 NULL,
289};
290
291/*##############################################################################
292// Start functions called by external Target Fabrics Modules
293//############################################################################*/
294
295/*
296 * First function called by fabric modules to:
297 *
298 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
299 * 2) Add struct target_fabric_configfs to g_tf_list
300 * 3) Return struct target_fabric_configfs to fabric module to be passed
301 * into target_fabric_configfs_register().
302 */
303struct target_fabric_configfs *target_fabric_configfs_init(
304 struct module *fabric_mod,
305 const char *name)
306{
307 struct target_fabric_configfs *tf;
308
309 if (!(name)) {
310 pr_err("Unable to locate passed fabric name\n");
311 return ERR_PTR(-EINVAL);
312 }
313 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
315 "_NAME_SIZE\n", name);
316 return ERR_PTR(-EINVAL);
317 }
318
319 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
320 if (!tf)
321 return ERR_PTR(-ENOMEM);
322
323 INIT_LIST_HEAD(&tf->tf_list);
324 atomic_set(&tf->tf_access_cnt, 0);
325 /*
326 * Setup the default generic struct config_item_type's (cits) in
327 * struct target_fabric_configfs->tf_cit_tmpl
328 */
329 tf->tf_module = fabric_mod;
330 target_fabric_setup_cits(tf);
331
332 tf->tf_subsys = target_core_subsystem[0];
333 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
334
335 mutex_lock(&g_tf_lock);
336 list_add_tail(&tf->tf_list, &g_tf_list);
337 mutex_unlock(&g_tf_lock);
338
339 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
340 ">>>>>>>>>>>>>>\n");
341 pr_debug("Initialized struct target_fabric_configfs: %p for"
342 " %s\n", tf, tf->tf_name);
343 return tf;
344}
345EXPORT_SYMBOL(target_fabric_configfs_init);
346
347/*
348 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
349 */
350void target_fabric_configfs_free(
351 struct target_fabric_configfs *tf)
352{
353 mutex_lock(&g_tf_lock);
354 list_del(&tf->tf_list);
355 mutex_unlock(&g_tf_lock);
356
357 kfree(tf);
358}
359EXPORT_SYMBOL(target_fabric_configfs_free);
360
361/*
362 * Perform a sanity check of the passed tf->tf_ops before completing
363 * TCM fabric module registration.
364 */
365static int target_fabric_tf_ops_check(
366 struct target_fabric_configfs *tf)
367{
368 struct target_core_fabric_ops *tfo = &tf->tf_ops;
369
370 if (!tfo->get_fabric_name) {
371 pr_err("Missing tfo->get_fabric_name()\n");
372 return -EINVAL;
373 }
374 if (!tfo->get_fabric_proto_ident) {
375 pr_err("Missing tfo->get_fabric_proto_ident()\n");
376 return -EINVAL;
377 }
378 if (!tfo->tpg_get_wwn) {
379 pr_err("Missing tfo->tpg_get_wwn()\n");
380 return -EINVAL;
381 }
382 if (!tfo->tpg_get_tag) {
383 pr_err("Missing tfo->tpg_get_tag()\n");
384 return -EINVAL;
385 }
386 if (!tfo->tpg_get_default_depth) {
387 pr_err("Missing tfo->tpg_get_default_depth()\n");
388 return -EINVAL;
389 }
390 if (!tfo->tpg_get_pr_transport_id) {
391 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
392 return -EINVAL;
393 }
394 if (!tfo->tpg_get_pr_transport_id_len) {
395 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
396 return -EINVAL;
397 }
398 if (!tfo->tpg_check_demo_mode) {
399 pr_err("Missing tfo->tpg_check_demo_mode()\n");
400 return -EINVAL;
401 }
402 if (!tfo->tpg_check_demo_mode_cache) {
403 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
404 return -EINVAL;
405 }
406 if (!tfo->tpg_check_demo_mode_write_protect) {
407 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
408 return -EINVAL;
409 }
410 if (!tfo->tpg_check_prod_mode_write_protect) {
411 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
412 return -EINVAL;
413 }
414 if (!tfo->tpg_alloc_fabric_acl) {
415 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
416 return -EINVAL;
417 }
418 if (!tfo->tpg_release_fabric_acl) {
419 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
420 return -EINVAL;
421 }
422 if (!tfo->tpg_get_inst_index) {
423 pr_err("Missing tfo->tpg_get_inst_index()\n");
424 return -EINVAL;
425 }
426 if (!tfo->release_cmd) {
427 pr_err("Missing tfo->release_cmd()\n");
428 return -EINVAL;
429 }
430 if (!tfo->shutdown_session) {
431 pr_err("Missing tfo->shutdown_session()\n");
432 return -EINVAL;
433 }
434 if (!tfo->close_session) {
435 pr_err("Missing tfo->close_session()\n");
436 return -EINVAL;
437 }
438 if (!tfo->stop_session) {
439 pr_err("Missing tfo->stop_session()\n");
440 return -EINVAL;
441 }
442 if (!tfo->fall_back_to_erl0) {
443 pr_err("Missing tfo->fall_back_to_erl0()\n");
444 return -EINVAL;
445 }
446 if (!tfo->sess_logged_in) {
447 pr_err("Missing tfo->sess_logged_in()\n");
448 return -EINVAL;
449 }
450 if (!tfo->sess_get_index) {
451 pr_err("Missing tfo->sess_get_index()\n");
452 return -EINVAL;
453 }
454 if (!tfo->write_pending) {
455 pr_err("Missing tfo->write_pending()\n");
456 return -EINVAL;
457 }
458 if (!tfo->write_pending_status) {
459 pr_err("Missing tfo->write_pending_status()\n");
460 return -EINVAL;
461 }
462 if (!tfo->set_default_node_attributes) {
463 pr_err("Missing tfo->set_default_node_attributes()\n");
464 return -EINVAL;
465 }
466 if (!tfo->get_task_tag) {
467 pr_err("Missing tfo->get_task_tag()\n");
468 return -EINVAL;
469 }
470 if (!tfo->get_cmd_state) {
471 pr_err("Missing tfo->get_cmd_state()\n");
472 return -EINVAL;
473 }
474 if (!tfo->queue_data_in) {
475 pr_err("Missing tfo->queue_data_in()\n");
476 return -EINVAL;
477 }
478 if (!tfo->queue_status) {
479 pr_err("Missing tfo->queue_status()\n");
480 return -EINVAL;
481 }
482 if (!tfo->queue_tm_rsp) {
483 pr_err("Missing tfo->queue_tm_rsp()\n");
484 return -EINVAL;
485 }
486 if (!tfo->set_fabric_sense_len) {
487 pr_err("Missing tfo->set_fabric_sense_len()\n");
488 return -EINVAL;
489 }
490 if (!tfo->get_fabric_sense_len) {
491 pr_err("Missing tfo->get_fabric_sense_len()\n");
492 return -EINVAL;
493 }
494 if (!tfo->is_state_remove) {
495 pr_err("Missing tfo->is_state_remove()\n");
496 return -EINVAL;
497 }
498 /*
499 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
500 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
501 * target_core_fabric_configfs.c WWN+TPG group context code.
502 */
503 if (!tfo->fabric_make_wwn) {
504 pr_err("Missing tfo->fabric_make_wwn()\n");
505 return -EINVAL;
506 }
507 if (!tfo->fabric_drop_wwn) {
508 pr_err("Missing tfo->fabric_drop_wwn()\n");
509 return -EINVAL;
510 }
511 if (!tfo->fabric_make_tpg) {
512 pr_err("Missing tfo->fabric_make_tpg()\n");
513 return -EINVAL;
514 }
515 if (!tfo->fabric_drop_tpg) {
516 pr_err("Missing tfo->fabric_drop_tpg()\n");
517 return -EINVAL;
518 }
519
520 return 0;
521}
522
523/*
524 * Called 2nd from fabric module with returned parameter of
525 * struct target_fabric_configfs * from target_fabric_configfs_init().
526 *
527 * Upon a successful registration, the new fabric's struct config_item is
528 * return. Also, a pointer to this struct is set in the passed
529 * struct target_fabric_configfs.
530 */
531int target_fabric_configfs_register(
532 struct target_fabric_configfs *tf)
533{
534 int ret;
535
536 if (!tf) {
537 pr_err("Unable to locate target_fabric_configfs"
538 " pointer\n");
539 return -EINVAL;
540 }
541 if (!tf->tf_subsys) {
542 pr_err("Unable to target struct config_subsystem"
543 " pointer\n");
544 return -EINVAL;
545 }
546 ret = target_fabric_tf_ops_check(tf);
547 if (ret < 0)
548 return ret;
549
550 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
551 ">>>>>>>>>>\n");
552 return 0;
553}
554EXPORT_SYMBOL(target_fabric_configfs_register);
555
556void target_fabric_configfs_deregister(
557 struct target_fabric_configfs *tf)
558{
559 struct configfs_subsystem *su;
560
561 if (!tf) {
562 pr_err("Unable to locate passed target_fabric_"
563 "configfs\n");
564 return;
565 }
566 su = tf->tf_subsys;
567 if (!su) {
568 pr_err("Unable to locate passed tf->tf_subsys"
569 " pointer\n");
570 return;
571 }
572 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
573 ">>>>>>>>>>>>\n");
574 mutex_lock(&g_tf_lock);
575 if (atomic_read(&tf->tf_access_cnt)) {
576 mutex_unlock(&g_tf_lock);
577 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
578 tf->tf_name);
579 BUG();
580 }
581 list_del(&tf->tf_list);
582 mutex_unlock(&g_tf_lock);
583
584 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
585 " %s\n", tf->tf_name);
586 tf->tf_module = NULL;
587 tf->tf_subsys = NULL;
588 kfree(tf);
589
590 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
591 ">>>>>\n");
592}
593EXPORT_SYMBOL(target_fabric_configfs_deregister);
594
595/*##############################################################################
596// Stop functions called by external Target Fabrics Modules
597//############################################################################*/
598
599/* Start functions for struct config_item_type target_core_dev_attrib_cit */
600
601#define DEF_DEV_ATTRIB_SHOW(_name) \
602static ssize_t target_core_dev_show_attr_##_name( \
603 struct se_dev_attrib *da, \
604 char *page) \
605{ \
606 struct se_device *dev; \
607 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
608 ssize_t rb; \
609 \
610 spin_lock(&se_dev->se_dev_lock); \
611 dev = se_dev->se_dev_ptr; \
612 if (!dev) { \
613 spin_unlock(&se_dev->se_dev_lock); \
614 return -ENODEV; \
615 } \
616 rb = snprintf(page, PAGE_SIZE, "%u\n", \
617 (u32)dev->se_sub_dev->se_dev_attrib._name); \
618 spin_unlock(&se_dev->se_dev_lock); \
619 \
620 return rb; \
621}
622
623#define DEF_DEV_ATTRIB_STORE(_name) \
624static ssize_t target_core_dev_store_attr_##_name( \
625 struct se_dev_attrib *da, \
626 const char *page, \
627 size_t count) \
628{ \
629 struct se_device *dev; \
630 struct se_subsystem_dev *se_dev = da->da_sub_dev; \
631 unsigned long val; \
632 int ret; \
633 \
634 spin_lock(&se_dev->se_dev_lock); \
635 dev = se_dev->se_dev_ptr; \
636 if (!dev) { \
637 spin_unlock(&se_dev->se_dev_lock); \
638 return -ENODEV; \
639 } \
640 ret = strict_strtoul(page, 0, &val); \
641 if (ret < 0) { \
642 spin_unlock(&se_dev->se_dev_lock); \
643 pr_err("strict_strtoul() failed with" \
644 " ret: %d\n", ret); \
645 return -EINVAL; \
646 } \
647 ret = se_dev_set_##_name(dev, (u32)val); \
648 spin_unlock(&se_dev->se_dev_lock); \
649 \
650 return (!ret) ? count : -EINVAL; \
651}
652
653#define DEF_DEV_ATTRIB(_name) \
654DEF_DEV_ATTRIB_SHOW(_name); \
655DEF_DEV_ATTRIB_STORE(_name);
656
657#define DEF_DEV_ATTRIB_RO(_name) \
658DEF_DEV_ATTRIB_SHOW(_name);
659
660CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
661#define SE_DEV_ATTR(_name, _mode) \
662static struct target_core_dev_attrib_attribute \
663 target_core_dev_attrib_##_name = \
664 __CONFIGFS_EATTR(_name, _mode, \
665 target_core_dev_show_attr_##_name, \
666 target_core_dev_store_attr_##_name);
667
668#define SE_DEV_ATTR_RO(_name); \
669static struct target_core_dev_attrib_attribute \
670 target_core_dev_attrib_##_name = \
671 __CONFIGFS_EATTR_RO(_name, \
672 target_core_dev_show_attr_##_name);
673
674DEF_DEV_ATTRIB(emulate_dpo);
675SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
676
677DEF_DEV_ATTRIB(emulate_fua_write);
678SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
679
680DEF_DEV_ATTRIB(emulate_fua_read);
681SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
682
683DEF_DEV_ATTRIB(emulate_write_cache);
684SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
685
686DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
687SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(emulate_tas);
690SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(emulate_tpu);
693SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(emulate_tpws);
696SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(enforce_pr_isids);
699SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(is_nonrot);
702SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
703
704DEF_DEV_ATTRIB(emulate_rest_reord);
705SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
706
707DEF_DEV_ATTRIB_RO(hw_block_size);
708SE_DEV_ATTR_RO(hw_block_size);
709
710DEF_DEV_ATTRIB(block_size);
711SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
712
713DEF_DEV_ATTRIB_RO(hw_max_sectors);
714SE_DEV_ATTR_RO(hw_max_sectors);
715
716DEF_DEV_ATTRIB(max_sectors);
717SE_DEV_ATTR(max_sectors, S_IRUGO | S_IWUSR);
718
719DEF_DEV_ATTRIB(optimal_sectors);
720SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
721
722DEF_DEV_ATTRIB_RO(hw_queue_depth);
723SE_DEV_ATTR_RO(hw_queue_depth);
724
725DEF_DEV_ATTRIB(queue_depth);
726SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
727
728DEF_DEV_ATTRIB(task_timeout);
729SE_DEV_ATTR(task_timeout, S_IRUGO | S_IWUSR);
730
731DEF_DEV_ATTRIB(max_unmap_lba_count);
732SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
733
734DEF_DEV_ATTRIB(max_unmap_block_desc_count);
735SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
736
737DEF_DEV_ATTRIB(unmap_granularity);
738SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
739
740DEF_DEV_ATTRIB(unmap_granularity_alignment);
741SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
742
743CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
744
745static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
746 &target_core_dev_attrib_emulate_dpo.attr,
747 &target_core_dev_attrib_emulate_fua_write.attr,
748 &target_core_dev_attrib_emulate_fua_read.attr,
749 &target_core_dev_attrib_emulate_write_cache.attr,
750 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
751 &target_core_dev_attrib_emulate_tas.attr,
752 &target_core_dev_attrib_emulate_tpu.attr,
753 &target_core_dev_attrib_emulate_tpws.attr,
754 &target_core_dev_attrib_enforce_pr_isids.attr,
755 &target_core_dev_attrib_is_nonrot.attr,
756 &target_core_dev_attrib_emulate_rest_reord.attr,
757 &target_core_dev_attrib_hw_block_size.attr,
758 &target_core_dev_attrib_block_size.attr,
759 &target_core_dev_attrib_hw_max_sectors.attr,
760 &target_core_dev_attrib_max_sectors.attr,
761 &target_core_dev_attrib_optimal_sectors.attr,
762 &target_core_dev_attrib_hw_queue_depth.attr,
763 &target_core_dev_attrib_queue_depth.attr,
764 &target_core_dev_attrib_task_timeout.attr,
765 &target_core_dev_attrib_max_unmap_lba_count.attr,
766 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
767 &target_core_dev_attrib_unmap_granularity.attr,
768 &target_core_dev_attrib_unmap_granularity_alignment.attr,
769 NULL,
770};
771
772static struct configfs_item_operations target_core_dev_attrib_ops = {
773 .show_attribute = target_core_dev_attrib_attr_show,
774 .store_attribute = target_core_dev_attrib_attr_store,
775};
776
777static struct config_item_type target_core_dev_attrib_cit = {
778 .ct_item_ops = &target_core_dev_attrib_ops,
779 .ct_attrs = target_core_dev_attrib_attrs,
780 .ct_owner = THIS_MODULE,
781};
782
783/* End functions for struct config_item_type target_core_dev_attrib_cit */
784
785/* Start functions for struct config_item_type target_core_dev_wwn_cit */
786
787CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
788#define SE_DEV_WWN_ATTR(_name, _mode) \
789static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
790 __CONFIGFS_EATTR(_name, _mode, \
791 target_core_dev_wwn_show_attr_##_name, \
792 target_core_dev_wwn_store_attr_##_name);
793
794#define SE_DEV_WWN_ATTR_RO(_name); \
795do { \
796 static struct target_core_dev_wwn_attribute \
797 target_core_dev_wwn_##_name = \
798 __CONFIGFS_EATTR_RO(_name, \
799 target_core_dev_wwn_show_attr_##_name); \
800} while (0);
801
802/*
803 * VPD page 0x80 Unit serial
804 */
805static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
806 struct t10_wwn *t10_wwn,
807 char *page)
808{
809 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
810 struct se_device *dev;
811
812 dev = se_dev->se_dev_ptr;
813 if (!dev)
814 return -ENODEV;
815
816 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
817 &t10_wwn->unit_serial[0]);
818}
819
820static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
821 struct t10_wwn *t10_wwn,
822 const char *page,
823 size_t count)
824{
825 struct se_subsystem_dev *su_dev = t10_wwn->t10_sub_dev;
826 struct se_device *dev;
827 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
828
829 /*
830 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
831 * from the struct scsi_device level firmware, do not allow
832 * VPD Unit Serial to be emulated.
833 *
834 * Note this struct scsi_device could also be emulating VPD
835 * information from its drivers/scsi LLD. But for now we assume
836 * it is doing 'the right thing' wrt a world wide unique
837 * VPD Unit Serial Number that OS dependent multipath can depend on.
838 */
839 if (su_dev->su_dev_flags & SDF_FIRMWARE_VPD_UNIT_SERIAL) {
840 pr_err("Underlying SCSI device firmware provided VPD"
841 " Unit Serial, ignoring request\n");
842 return -EOPNOTSUPP;
843 }
844
845 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
846 pr_err("Emulated VPD Unit Serial exceeds"
847 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
848 return -EOVERFLOW;
849 }
850 /*
851 * Check to see if any active $FABRIC_MOD exports exist. If they
852 * do exist, fail here as changing this information on the fly
853 * (underneath the initiator side OS dependent multipath code)
854 * could cause negative effects.
855 */
856 dev = su_dev->se_dev_ptr;
857 if (dev) {
858 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
859 pr_err("Unable to set VPD Unit Serial while"
860 " active %d $FABRIC_MOD exports exist\n",
861 atomic_read(&dev->dev_export_obj.obj_access_count));
862 return -EINVAL;
863 }
864 }
865 /*
866 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
867 *
868 * Also, strip any newline added from the userspace
869 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
870 */
871 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
872 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
873 snprintf(su_dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
874 "%s", strstrip(buf));
875 su_dev->su_dev_flags |= SDF_EMULATED_VPD_UNIT_SERIAL;
876
877 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
878 " %s\n", su_dev->t10_wwn.unit_serial);
879
880 return count;
881}
882
883SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
884
885/*
886 * VPD page 0x83 Protocol Identifier
887 */
888static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
889 struct t10_wwn *t10_wwn,
890 char *page)
891{
892 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev;
893 struct se_device *dev;
894 struct t10_vpd *vpd;
895 unsigned char buf[VPD_TMP_BUF_SIZE];
896 ssize_t len = 0;
897
898 dev = se_dev->se_dev_ptr;
899 if (!dev)
900 return -ENODEV;
901
902 memset(buf, 0, VPD_TMP_BUF_SIZE);
903
904 spin_lock(&t10_wwn->t10_vpd_lock);
905 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
906 if (!vpd->protocol_identifier_set)
907 continue;
908
909 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
910
911 if (len + strlen(buf) >= PAGE_SIZE)
912 break;
913
914 len += sprintf(page+len, "%s", buf);
915 }
916 spin_unlock(&t10_wwn->t10_vpd_lock);
917
918 return len;
919}
920
921static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
922 struct t10_wwn *t10_wwn,
923 const char *page,
924 size_t count)
925{
926 return -ENOSYS;
927}
928
929SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
930
931/*
932 * Generic wrapper for dumping VPD identifiers by association.
933 */
934#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
935static ssize_t target_core_dev_wwn_show_attr_##_name( \
936 struct t10_wwn *t10_wwn, \
937 char *page) \
938{ \
939 struct se_subsystem_dev *se_dev = t10_wwn->t10_sub_dev; \
940 struct se_device *dev; \
941 struct t10_vpd *vpd; \
942 unsigned char buf[VPD_TMP_BUF_SIZE]; \
943 ssize_t len = 0; \
944 \
945 dev = se_dev->se_dev_ptr; \
946 if (!dev) \
947 return -ENODEV; \
948 \
949 spin_lock(&t10_wwn->t10_vpd_lock); \
950 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
951 if (vpd->association != _assoc) \
952 continue; \
953 \
954 memset(buf, 0, VPD_TMP_BUF_SIZE); \
955 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
956 if (len + strlen(buf) >= PAGE_SIZE) \
957 break; \
958 len += sprintf(page+len, "%s", buf); \
959 \
960 memset(buf, 0, VPD_TMP_BUF_SIZE); \
961 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
962 if (len + strlen(buf) >= PAGE_SIZE) \
963 break; \
964 len += sprintf(page+len, "%s", buf); \
965 \
966 memset(buf, 0, VPD_TMP_BUF_SIZE); \
967 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
968 if (len + strlen(buf) >= PAGE_SIZE) \
969 break; \
970 len += sprintf(page+len, "%s", buf); \
971 } \
972 spin_unlock(&t10_wwn->t10_vpd_lock); \
973 \
974 return len; \
975}
976
977/*
978 * VPD page 0x83 Association: Logical Unit
979 */
980DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
981
982static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
983 struct t10_wwn *t10_wwn,
984 const char *page,
985 size_t count)
986{
987 return -ENOSYS;
988}
989
990SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
991
992/*
993 * VPD page 0x83 Association: Target Port
994 */
995DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
996
997static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
998 struct t10_wwn *t10_wwn,
999 const char *page,
1000 size_t count)
1001{
1002 return -ENOSYS;
1003}
1004
1005SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1006
1007/*
1008 * VPD page 0x83 Association: SCSI Target Device
1009 */
1010DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1011
1012static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1013 struct t10_wwn *t10_wwn,
1014 const char *page,
1015 size_t count)
1016{
1017 return -ENOSYS;
1018}
1019
1020SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1021
1022CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1023
1024static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1025 &target_core_dev_wwn_vpd_unit_serial.attr,
1026 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1027 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1028 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1029 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1030 NULL,
1031};
1032
1033static struct configfs_item_operations target_core_dev_wwn_ops = {
1034 .show_attribute = target_core_dev_wwn_attr_show,
1035 .store_attribute = target_core_dev_wwn_attr_store,
1036};
1037
1038static struct config_item_type target_core_dev_wwn_cit = {
1039 .ct_item_ops = &target_core_dev_wwn_ops,
1040 .ct_attrs = target_core_dev_wwn_attrs,
1041 .ct_owner = THIS_MODULE,
1042};
1043
1044/* End functions for struct config_item_type target_core_dev_wwn_cit */
1045
1046/* Start functions for struct config_item_type target_core_dev_pr_cit */
1047
1048CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_subsystem_dev);
1049#define SE_DEV_PR_ATTR(_name, _mode) \
1050static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1051 __CONFIGFS_EATTR(_name, _mode, \
1052 target_core_dev_pr_show_attr_##_name, \
1053 target_core_dev_pr_store_attr_##_name);
1054
1055#define SE_DEV_PR_ATTR_RO(_name); \
1056static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1057 __CONFIGFS_EATTR_RO(_name, \
1058 target_core_dev_pr_show_attr_##_name);
1059
1060/*
1061 * res_holder
1062 */
1063static ssize_t target_core_dev_pr_show_spc3_res(
1064 struct se_device *dev,
1065 char *page,
1066 ssize_t *len)
1067{
1068 struct se_node_acl *se_nacl;
1069 struct t10_pr_registration *pr_reg;
1070 char i_buf[PR_REG_ISID_ID_LEN];
1071 int prf_isid;
1072
1073 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1074
1075 spin_lock(&dev->dev_reservation_lock);
1076 pr_reg = dev->dev_pr_res_holder;
1077 if (!pr_reg) {
1078 *len += sprintf(page + *len, "No SPC-3 Reservation holder\n");
1079 spin_unlock(&dev->dev_reservation_lock);
1080 return *len;
1081 }
1082 se_nacl = pr_reg->pr_reg_nacl;
1083 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1084 PR_REG_ISID_ID_LEN);
1085
1086 *len += sprintf(page + *len, "SPC-3 Reservation: %s Initiator: %s%s\n",
1087 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1088 se_nacl->initiatorname, (prf_isid) ? &i_buf[0] : "");
1089 spin_unlock(&dev->dev_reservation_lock);
1090
1091 return *len;
1092}
1093
1094static ssize_t target_core_dev_pr_show_spc2_res(
1095 struct se_device *dev,
1096 char *page,
1097 ssize_t *len)
1098{
1099 struct se_node_acl *se_nacl;
1100
1101 spin_lock(&dev->dev_reservation_lock);
1102 se_nacl = dev->dev_reserved_node_acl;
1103 if (!se_nacl) {
1104 *len += sprintf(page + *len, "No SPC-2 Reservation holder\n");
1105 spin_unlock(&dev->dev_reservation_lock);
1106 return *len;
1107 }
1108 *len += sprintf(page + *len, "SPC-2 Reservation: %s Initiator: %s\n",
1109 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1110 se_nacl->initiatorname);
1111 spin_unlock(&dev->dev_reservation_lock);
1112
1113 return *len;
1114}
1115
1116static ssize_t target_core_dev_pr_show_attr_res_holder(
1117 struct se_subsystem_dev *su_dev,
1118 char *page)
1119{
1120 ssize_t len = 0;
1121
1122 if (!su_dev->se_dev_ptr)
1123 return -ENODEV;
1124
1125 switch (su_dev->t10_pr.res_type) {
1126 case SPC3_PERSISTENT_RESERVATIONS:
1127 target_core_dev_pr_show_spc3_res(su_dev->se_dev_ptr,
1128 page, &len);
1129 break;
1130 case SPC2_RESERVATIONS:
1131 target_core_dev_pr_show_spc2_res(su_dev->se_dev_ptr,
1132 page, &len);
1133 break;
1134 case SPC_PASSTHROUGH:
1135 len += sprintf(page+len, "Passthrough\n");
1136 break;
1137 default:
1138 len += sprintf(page+len, "Unknown\n");
1139 break;
1140 }
1141
1142 return len;
1143}
1144
1145SE_DEV_PR_ATTR_RO(res_holder);
1146
1147/*
1148 * res_pr_all_tgt_pts
1149 */
1150static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1151 struct se_subsystem_dev *su_dev,
1152 char *page)
1153{
1154 struct se_device *dev;
1155 struct t10_pr_registration *pr_reg;
1156 ssize_t len = 0;
1157
1158 dev = su_dev->se_dev_ptr;
1159 if (!dev)
1160 return -ENODEV;
1161
1162 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1163 return len;
1164
1165 spin_lock(&dev->dev_reservation_lock);
1166 pr_reg = dev->dev_pr_res_holder;
1167 if (!pr_reg) {
1168 len = sprintf(page, "No SPC-3 Reservation holder\n");
1169 spin_unlock(&dev->dev_reservation_lock);
1170 return len;
1171 }
1172 /*
1173 * See All Target Ports (ALL_TG_PT) bit in spcr17, section 6.14.3
1174 * Basic PERSISTENT RESERVER OUT parameter list, page 290
1175 */
1176 if (pr_reg->pr_reg_all_tg_pt)
1177 len = sprintf(page, "SPC-3 Reservation: All Target"
1178 " Ports registration\n");
1179 else
1180 len = sprintf(page, "SPC-3 Reservation: Single"
1181 " Target Port registration\n");
1182 spin_unlock(&dev->dev_reservation_lock);
1183
1184 return len;
1185}
1186
1187SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1188
1189/*
1190 * res_pr_generation
1191 */
1192static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1193 struct se_subsystem_dev *su_dev,
1194 char *page)
1195{
1196 if (!su_dev->se_dev_ptr)
1197 return -ENODEV;
1198
1199 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1200 return 0;
1201
1202 return sprintf(page, "0x%08x\n", su_dev->t10_pr.pr_generation);
1203}
1204
1205SE_DEV_PR_ATTR_RO(res_pr_generation);
1206
1207/*
1208 * res_pr_holder_tg_port
1209 */
1210static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1211 struct se_subsystem_dev *su_dev,
1212 char *page)
1213{
1214 struct se_device *dev;
1215 struct se_node_acl *se_nacl;
1216 struct se_lun *lun;
1217 struct se_portal_group *se_tpg;
1218 struct t10_pr_registration *pr_reg;
1219 struct target_core_fabric_ops *tfo;
1220 ssize_t len = 0;
1221
1222 dev = su_dev->se_dev_ptr;
1223 if (!dev)
1224 return -ENODEV;
1225
1226 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1227 return len;
1228
1229 spin_lock(&dev->dev_reservation_lock);
1230 pr_reg = dev->dev_pr_res_holder;
1231 if (!pr_reg) {
1232 len = sprintf(page, "No SPC-3 Reservation holder\n");
1233 spin_unlock(&dev->dev_reservation_lock);
1234 return len;
1235 }
1236 se_nacl = pr_reg->pr_reg_nacl;
1237 se_tpg = se_nacl->se_tpg;
1238 lun = pr_reg->pr_reg_tg_pt_lun;
1239 tfo = se_tpg->se_tpg_tfo;
1240
1241 len += sprintf(page+len, "SPC-3 Reservation: %s"
1242 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1243 tfo->tpg_get_wwn(se_tpg));
1244 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1245 " Identifer Tag: %hu %s Portal Group Tag: %hu"
1246 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1247 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1248 tfo->get_fabric_name(), lun->unpacked_lun);
1249 spin_unlock(&dev->dev_reservation_lock);
1250
1251 return len;
1252}
1253
1254SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1255
1256/*
1257 * res_pr_registered_i_pts
1258 */
1259static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1260 struct se_subsystem_dev *su_dev,
1261 char *page)
1262{
1263 struct target_core_fabric_ops *tfo;
1264 struct t10_pr_registration *pr_reg;
1265 unsigned char buf[384];
1266 char i_buf[PR_REG_ISID_ID_LEN];
1267 ssize_t len = 0;
1268 int reg_count = 0, prf_isid;
1269
1270 if (!su_dev->se_dev_ptr)
1271 return -ENODEV;
1272
1273 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1274 return len;
1275
1276 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1277
1278 spin_lock(&su_dev->t10_pr.registration_lock);
1279 list_for_each_entry(pr_reg, &su_dev->t10_pr.registration_list,
1280 pr_reg_list) {
1281
1282 memset(buf, 0, 384);
1283 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1284 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1285 prf_isid = core_pr_dump_initiator_port(pr_reg, &i_buf[0],
1286 PR_REG_ISID_ID_LEN);
1287 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1288 tfo->get_fabric_name(),
1289 pr_reg->pr_reg_nacl->initiatorname, (prf_isid) ?
1290 &i_buf[0] : "", pr_reg->pr_res_key,
1291 pr_reg->pr_res_generation);
1292
1293 if (len + strlen(buf) >= PAGE_SIZE)
1294 break;
1295
1296 len += sprintf(page+len, "%s", buf);
1297 reg_count++;
1298 }
1299 spin_unlock(&su_dev->t10_pr.registration_lock);
1300
1301 if (!reg_count)
1302 len += sprintf(page+len, "None\n");
1303
1304 return len;
1305}
1306
1307SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1308
1309/*
1310 * res_pr_type
1311 */
1312static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1313 struct se_subsystem_dev *su_dev,
1314 char *page)
1315{
1316 struct se_device *dev;
1317 struct t10_pr_registration *pr_reg;
1318 ssize_t len = 0;
1319
1320 dev = su_dev->se_dev_ptr;
1321 if (!dev)
1322 return -ENODEV;
1323
1324 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1325 return len;
1326
1327 spin_lock(&dev->dev_reservation_lock);
1328 pr_reg = dev->dev_pr_res_holder;
1329 if (!pr_reg) {
1330 len = sprintf(page, "No SPC-3 Reservation holder\n");
1331 spin_unlock(&dev->dev_reservation_lock);
1332 return len;
1333 }
1334 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1335 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1336 spin_unlock(&dev->dev_reservation_lock);
1337
1338 return len;
1339}
1340
1341SE_DEV_PR_ATTR_RO(res_pr_type);
1342
1343/*
1344 * res_type
1345 */
1346static ssize_t target_core_dev_pr_show_attr_res_type(
1347 struct se_subsystem_dev *su_dev,
1348 char *page)
1349{
1350 ssize_t len = 0;
1351
1352 if (!su_dev->se_dev_ptr)
1353 return -ENODEV;
1354
1355 switch (su_dev->t10_pr.res_type) {
1356 case SPC3_PERSISTENT_RESERVATIONS:
1357 len = sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1358 break;
1359 case SPC2_RESERVATIONS:
1360 len = sprintf(page, "SPC2_RESERVATIONS\n");
1361 break;
1362 case SPC_PASSTHROUGH:
1363 len = sprintf(page, "SPC_PASSTHROUGH\n");
1364 break;
1365 default:
1366 len = sprintf(page, "UNKNOWN\n");
1367 break;
1368 }
1369
1370 return len;
1371}
1372
1373SE_DEV_PR_ATTR_RO(res_type);
1374
1375/*
1376 * res_aptpl_active
1377 */
1378
1379static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1380 struct se_subsystem_dev *su_dev,
1381 char *page)
1382{
1383 if (!su_dev->se_dev_ptr)
1384 return -ENODEV;
1385
1386 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1387 return 0;
1388
1389 return sprintf(page, "APTPL Bit Status: %s\n",
1390 (su_dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1391}
1392
1393SE_DEV_PR_ATTR_RO(res_aptpl_active);
1394
1395/*
1396 * res_aptpl_metadata
1397 */
1398static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1399 struct se_subsystem_dev *su_dev,
1400 char *page)
1401{
1402 if (!su_dev->se_dev_ptr)
1403 return -ENODEV;
1404
1405 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1406 return 0;
1407
1408 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1409}
1410
1411enum {
1412 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1413 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1414 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1415 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1416};
1417
1418static match_table_t tokens = {
1419 {Opt_initiator_fabric, "initiator_fabric=%s"},
1420 {Opt_initiator_node, "initiator_node=%s"},
1421 {Opt_initiator_sid, "initiator_sid=%s"},
1422 {Opt_sa_res_key, "sa_res_key=%s"},
1423 {Opt_res_holder, "res_holder=%d"},
1424 {Opt_res_type, "res_type=%d"},
1425 {Opt_res_scope, "res_scope=%d"},
1426 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1427 {Opt_mapped_lun, "mapped_lun=%d"},
1428 {Opt_target_fabric, "target_fabric=%s"},
1429 {Opt_target_node, "target_node=%s"},
1430 {Opt_tpgt, "tpgt=%d"},
1431 {Opt_port_rtpi, "port_rtpi=%d"},
1432 {Opt_target_lun, "target_lun=%d"},
1433 {Opt_err, NULL}
1434};
1435
1436static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1437 struct se_subsystem_dev *su_dev,
1438 const char *page,
1439 size_t count)
1440{
1441 struct se_device *dev;
1442 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1443 unsigned char *t_fabric = NULL, *t_port = NULL;
1444 char *orig, *ptr, *arg_p, *opts;
1445 substring_t args[MAX_OPT_ARGS];
1446 unsigned long long tmp_ll;
1447 u64 sa_res_key = 0;
1448 u32 mapped_lun = 0, target_lun = 0;
1449 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1450 u16 port_rpti = 0, tpgt = 0;
1451 u8 type = 0, scope;
1452
1453 dev = su_dev->se_dev_ptr;
1454 if (!dev)
1455 return -ENODEV;
1456
1457 if (su_dev->t10_pr.res_type != SPC3_PERSISTENT_RESERVATIONS)
1458 return 0;
1459
1460 if (atomic_read(&dev->dev_export_obj.obj_access_count)) {
1461 pr_debug("Unable to process APTPL metadata while"
1462 " active fabric exports exist\n");
1463 return -EINVAL;
1464 }
1465
1466 opts = kstrdup(page, GFP_KERNEL);
1467 if (!opts)
1468 return -ENOMEM;
1469
1470 orig = opts;
1471 while ((ptr = strsep(&opts, ",")) != NULL) {
1472 if (!*ptr)
1473 continue;
1474
1475 token = match_token(ptr, tokens, args);
1476 switch (token) {
1477 case Opt_initiator_fabric:
1478 i_fabric = match_strdup(&args[0]);
1479 if (!i_fabric) {
1480 ret = -ENOMEM;
1481 goto out;
1482 }
1483 break;
1484 case Opt_initiator_node:
1485 i_port = match_strdup(&args[0]);
1486 if (!i_port) {
1487 ret = -ENOMEM;
1488 goto out;
1489 }
1490 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1491 pr_err("APTPL metadata initiator_node="
1492 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1493 PR_APTPL_MAX_IPORT_LEN);
1494 ret = -EINVAL;
1495 break;
1496 }
1497 break;
1498 case Opt_initiator_sid:
1499 isid = match_strdup(&args[0]);
1500 if (!isid) {
1501 ret = -ENOMEM;
1502 goto out;
1503 }
1504 if (strlen(isid) >= PR_REG_ISID_LEN) {
1505 pr_err("APTPL metadata initiator_isid"
1506 "= exceeds PR_REG_ISID_LEN: %d\n",
1507 PR_REG_ISID_LEN);
1508 ret = -EINVAL;
1509 break;
1510 }
1511 break;
1512 case Opt_sa_res_key:
1513 arg_p = match_strdup(&args[0]);
1514 if (!arg_p) {
1515 ret = -ENOMEM;
1516 goto out;
1517 }
1518 ret = strict_strtoull(arg_p, 0, &tmp_ll);
1519 if (ret < 0) {
1520 pr_err("strict_strtoull() failed for"
1521 " sa_res_key=\n");
1522 goto out;
1523 }
1524 sa_res_key = (u64)tmp_ll;
1525 break;
1526 /*
1527 * PR APTPL Metadata for Reservation
1528 */
1529 case Opt_res_holder:
1530 match_int(args, &arg);
1531 res_holder = arg;
1532 break;
1533 case Opt_res_type:
1534 match_int(args, &arg);
1535 type = (u8)arg;
1536 break;
1537 case Opt_res_scope:
1538 match_int(args, &arg);
1539 scope = (u8)arg;
1540 break;
1541 case Opt_res_all_tg_pt:
1542 match_int(args, &arg);
1543 all_tg_pt = (int)arg;
1544 break;
1545 case Opt_mapped_lun:
1546 match_int(args, &arg);
1547 mapped_lun = (u32)arg;
1548 break;
1549 /*
1550 * PR APTPL Metadata for Target Port
1551 */
1552 case Opt_target_fabric:
1553 t_fabric = match_strdup(&args[0]);
1554 if (!t_fabric) {
1555 ret = -ENOMEM;
1556 goto out;
1557 }
1558 break;
1559 case Opt_target_node:
1560 t_port = match_strdup(&args[0]);
1561 if (!t_port) {
1562 ret = -ENOMEM;
1563 goto out;
1564 }
1565 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1566 pr_err("APTPL metadata target_node="
1567 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1568 PR_APTPL_MAX_TPORT_LEN);
1569 ret = -EINVAL;
1570 break;
1571 }
1572 break;
1573 case Opt_tpgt:
1574 match_int(args, &arg);
1575 tpgt = (u16)arg;
1576 break;
1577 case Opt_port_rtpi:
1578 match_int(args, &arg);
1579 port_rpti = (u16)arg;
1580 break;
1581 case Opt_target_lun:
1582 match_int(args, &arg);
1583 target_lun = (u32)arg;
1584 break;
1585 default:
1586 break;
1587 }
1588 }
1589
1590 if (!i_port || !t_port || !sa_res_key) {
1591 pr_err("Illegal parameters for APTPL registration\n");
1592 ret = -EINVAL;
1593 goto out;
1594 }
1595
1596 if (res_holder && !(type)) {
1597 pr_err("Illegal PR type: 0x%02x for reservation"
1598 " holder\n", type);
1599 ret = -EINVAL;
1600 goto out;
1601 }
1602
1603 ret = core_scsi3_alloc_aptpl_registration(&su_dev->t10_pr, sa_res_key,
1604 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1605 res_holder, all_tg_pt, type);
1606out:
1607 kfree(i_fabric);
1608 kfree(i_port);
1609 kfree(isid);
1610 kfree(t_fabric);
1611 kfree(t_port);
1612 kfree(orig);
1613 return (ret == 0) ? count : ret;
1614}
1615
1616SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1617
1618CONFIGFS_EATTR_OPS(target_core_dev_pr, se_subsystem_dev, se_dev_pr_group);
1619
1620static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1621 &target_core_dev_pr_res_holder.attr,
1622 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1623 &target_core_dev_pr_res_pr_generation.attr,
1624 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1625 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1626 &target_core_dev_pr_res_pr_type.attr,
1627 &target_core_dev_pr_res_type.attr,
1628 &target_core_dev_pr_res_aptpl_active.attr,
1629 &target_core_dev_pr_res_aptpl_metadata.attr,
1630 NULL,
1631};
1632
1633static struct configfs_item_operations target_core_dev_pr_ops = {
1634 .show_attribute = target_core_dev_pr_attr_show,
1635 .store_attribute = target_core_dev_pr_attr_store,
1636};
1637
1638static struct config_item_type target_core_dev_pr_cit = {
1639 .ct_item_ops = &target_core_dev_pr_ops,
1640 .ct_attrs = target_core_dev_pr_attrs,
1641 .ct_owner = THIS_MODULE,
1642};
1643
1644/* End functions for struct config_item_type target_core_dev_pr_cit */
1645
1646/* Start functions for struct config_item_type target_core_dev_cit */
1647
1648static ssize_t target_core_show_dev_info(void *p, char *page)
1649{
1650 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1651 struct se_hba *hba = se_dev->se_dev_hba;
1652 struct se_subsystem_api *t = hba->transport;
1653 int bl = 0;
1654 ssize_t read_bytes = 0;
1655
1656 if (!se_dev->se_dev_ptr)
1657 return -ENODEV;
1658
1659 transport_dump_dev_state(se_dev->se_dev_ptr, page, &bl);
1660 read_bytes += bl;
1661 read_bytes += t->show_configfs_dev_params(hba, se_dev, page+read_bytes);
1662 return read_bytes;
1663}
1664
1665static struct target_core_configfs_attribute target_core_attr_dev_info = {
1666 .attr = { .ca_owner = THIS_MODULE,
1667 .ca_name = "info",
1668 .ca_mode = S_IRUGO },
1669 .show = target_core_show_dev_info,
1670 .store = NULL,
1671};
1672
1673static ssize_t target_core_store_dev_control(
1674 void *p,
1675 const char *page,
1676 size_t count)
1677{
1678 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1679 struct se_hba *hba = se_dev->se_dev_hba;
1680 struct se_subsystem_api *t = hba->transport;
1681
1682 if (!se_dev->se_dev_su_ptr) {
1683 pr_err("Unable to locate struct se_subsystem_dev>se"
1684 "_dev_su_ptr\n");
1685 return -EINVAL;
1686 }
1687
1688 return t->set_configfs_dev_params(hba, se_dev, page, count);
1689}
1690
1691static struct target_core_configfs_attribute target_core_attr_dev_control = {
1692 .attr = { .ca_owner = THIS_MODULE,
1693 .ca_name = "control",
1694 .ca_mode = S_IWUSR },
1695 .show = NULL,
1696 .store = target_core_store_dev_control,
1697};
1698
1699static ssize_t target_core_show_dev_alias(void *p, char *page)
1700{
1701 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1702
1703 if (!(se_dev->su_dev_flags & SDF_USING_ALIAS))
1704 return 0;
1705
1706 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_alias);
1707}
1708
1709static ssize_t target_core_store_dev_alias(
1710 void *p,
1711 const char *page,
1712 size_t count)
1713{
1714 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1715 struct se_hba *hba = se_dev->se_dev_hba;
1716 ssize_t read_bytes;
1717
1718 if (count > (SE_DEV_ALIAS_LEN-1)) {
1719 pr_err("alias count: %d exceeds"
1720 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1721 SE_DEV_ALIAS_LEN-1);
1722 return -EINVAL;
1723 }
1724
1725 se_dev->su_dev_flags |= SDF_USING_ALIAS;
1726 read_bytes = snprintf(&se_dev->se_dev_alias[0], SE_DEV_ALIAS_LEN,
1727 "%s", page);
1728
1729 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1730 config_item_name(&hba->hba_group.cg_item),
1731 config_item_name(&se_dev->se_dev_group.cg_item),
1732 se_dev->se_dev_alias);
1733
1734 return read_bytes;
1735}
1736
1737static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1738 .attr = { .ca_owner = THIS_MODULE,
1739 .ca_name = "alias",
1740 .ca_mode = S_IRUGO | S_IWUSR },
1741 .show = target_core_show_dev_alias,
1742 .store = target_core_store_dev_alias,
1743};
1744
1745static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1746{
1747 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1748
1749 if (!(se_dev->su_dev_flags & SDF_USING_UDEV_PATH))
1750 return 0;
1751
1752 return snprintf(page, PAGE_SIZE, "%s\n", se_dev->se_dev_udev_path);
1753}
1754
1755static ssize_t target_core_store_dev_udev_path(
1756 void *p,
1757 const char *page,
1758 size_t count)
1759{
1760 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1761 struct se_hba *hba = se_dev->se_dev_hba;
1762 ssize_t read_bytes;
1763
1764 if (count > (SE_UDEV_PATH_LEN-1)) {
1765 pr_err("udev_path count: %d exceeds"
1766 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1767 SE_UDEV_PATH_LEN-1);
1768 return -EINVAL;
1769 }
1770
1771 se_dev->su_dev_flags |= SDF_USING_UDEV_PATH;
1772 read_bytes = snprintf(&se_dev->se_dev_udev_path[0], SE_UDEV_PATH_LEN,
1773 "%s", page);
1774
1775 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1776 config_item_name(&hba->hba_group.cg_item),
1777 config_item_name(&se_dev->se_dev_group.cg_item),
1778 se_dev->se_dev_udev_path);
1779
1780 return read_bytes;
1781}
1782
1783static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1784 .attr = { .ca_owner = THIS_MODULE,
1785 .ca_name = "udev_path",
1786 .ca_mode = S_IRUGO | S_IWUSR },
1787 .show = target_core_show_dev_udev_path,
1788 .store = target_core_store_dev_udev_path,
1789};
1790
1791static ssize_t target_core_store_dev_enable(
1792 void *p,
1793 const char *page,
1794 size_t count)
1795{
1796 struct se_subsystem_dev *se_dev = (struct se_subsystem_dev *)p;
1797 struct se_device *dev;
1798 struct se_hba *hba = se_dev->se_dev_hba;
1799 struct se_subsystem_api *t = hba->transport;
1800 char *ptr;
1801
1802 ptr = strstr(page, "1");
1803 if (!ptr) {
1804 pr_err("For dev_enable ops, only valid value"
1805 " is \"1\"\n");
1806 return -EINVAL;
1807 }
1808 if (se_dev->se_dev_ptr) {
1809 pr_err("se_dev->se_dev_ptr already set for storage"
1810 " object\n");
1811 return -EEXIST;
1812 }
1813
1814 if (t->check_configfs_dev_params(hba, se_dev) < 0)
1815 return -EINVAL;
1816
1817 dev = t->create_virtdevice(hba, se_dev, se_dev->se_dev_su_ptr);
1818 if (IS_ERR(dev))
1819 return PTR_ERR(dev);
1820 else if (!dev)
1821 return -EINVAL;
1822
1823 se_dev->se_dev_ptr = dev;
1824 pr_debug("Target_Core_ConfigFS: Registered se_dev->se_dev_ptr:"
1825 " %p\n", se_dev->se_dev_ptr);
1826
1827 return count;
1828}
1829
1830static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1831 .attr = { .ca_owner = THIS_MODULE,
1832 .ca_name = "enable",
1833 .ca_mode = S_IWUSR },
1834 .show = NULL,
1835 .store = target_core_store_dev_enable,
1836};
1837
1838static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1839{
1840 struct se_device *dev;
1841 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1842 struct config_item *lu_ci;
1843 struct t10_alua_lu_gp *lu_gp;
1844 struct t10_alua_lu_gp_member *lu_gp_mem;
1845 ssize_t len = 0;
1846
1847 dev = su_dev->se_dev_ptr;
1848 if (!dev)
1849 return -ENODEV;
1850
1851 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED)
1852 return len;
1853
1854 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1855 if (!lu_gp_mem) {
1856 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1857 " pointer\n");
1858 return -EINVAL;
1859 }
1860
1861 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1862 lu_gp = lu_gp_mem->lu_gp;
1863 if (lu_gp) {
1864 lu_ci = &lu_gp->lu_gp_group.cg_item;
1865 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1866 config_item_name(lu_ci), lu_gp->lu_gp_id);
1867 }
1868 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1869
1870 return len;
1871}
1872
1873static ssize_t target_core_store_alua_lu_gp(
1874 void *p,
1875 const char *page,
1876 size_t count)
1877{
1878 struct se_device *dev;
1879 struct se_subsystem_dev *su_dev = (struct se_subsystem_dev *)p;
1880 struct se_hba *hba = su_dev->se_dev_hba;
1881 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1882 struct t10_alua_lu_gp_member *lu_gp_mem;
1883 unsigned char buf[LU_GROUP_NAME_BUF];
1884 int move = 0;
1885
1886 dev = su_dev->se_dev_ptr;
1887 if (!dev)
1888 return -ENODEV;
1889
1890 if (su_dev->t10_alua.alua_type != SPC3_ALUA_EMULATED) {
1891 pr_warn("SPC3_ALUA_EMULATED not enabled for %s/%s\n",
1892 config_item_name(&hba->hba_group.cg_item),
1893 config_item_name(&su_dev->se_dev_group.cg_item));
1894 return -EINVAL;
1895 }
1896 if (count > LU_GROUP_NAME_BUF) {
1897 pr_err("ALUA LU Group Alias too large!\n");
1898 return -EINVAL;
1899 }
1900 memset(buf, 0, LU_GROUP_NAME_BUF);
1901 memcpy(buf, page, count);
1902 /*
1903 * Any ALUA logical unit alias besides "NULL" means we will be
1904 * making a new group association.
1905 */
1906 if (strcmp(strstrip(buf), "NULL")) {
1907 /*
1908 * core_alua_get_lu_gp_by_name() will increment reference to
1909 * struct t10_alua_lu_gp. This reference is released with
1910 * core_alua_get_lu_gp_by_name below().
1911 */
1912 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1913 if (!lu_gp_new)
1914 return -ENODEV;
1915 }
1916 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1917 if (!lu_gp_mem) {
1918 if (lu_gp_new)
1919 core_alua_put_lu_gp_from_name(lu_gp_new);
1920 pr_err("NULL struct se_device->dev_alua_lu_gp_mem"
1921 " pointer\n");
1922 return -EINVAL;
1923 }
1924
1925 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1926 lu_gp = lu_gp_mem->lu_gp;
1927 if (lu_gp) {
1928 /*
1929 * Clearing an existing lu_gp association, and replacing
1930 * with NULL
1931 */
1932 if (!lu_gp_new) {
1933 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1934 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1935 " %hu\n",
1936 config_item_name(&hba->hba_group.cg_item),
1937 config_item_name(&su_dev->se_dev_group.cg_item),
1938 config_item_name(&lu_gp->lu_gp_group.cg_item),
1939 lu_gp->lu_gp_id);
1940
1941 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1942 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1943
1944 return count;
1945 }
1946 /*
1947 * Removing existing association of lu_gp_mem with lu_gp
1948 */
1949 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1950 move = 1;
1951 }
1952 /*
1953 * Associate lu_gp_mem with lu_gp_new.
1954 */
1955 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1956 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1957
1958 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1959 " core/alua/lu_gps/%s, ID: %hu\n",
1960 (move) ? "Moving" : "Adding",
1961 config_item_name(&hba->hba_group.cg_item),
1962 config_item_name(&su_dev->se_dev_group.cg_item),
1963 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1964 lu_gp_new->lu_gp_id);
1965
1966 core_alua_put_lu_gp_from_name(lu_gp_new);
1967 return count;
1968}
1969
1970static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1971 .attr = { .ca_owner = THIS_MODULE,
1972 .ca_name = "alua_lu_gp",
1973 .ca_mode = S_IRUGO | S_IWUSR },
1974 .show = target_core_show_alua_lu_gp,
1975 .store = target_core_store_alua_lu_gp,
1976};
1977
1978static struct configfs_attribute *lio_core_dev_attrs[] = {
1979 &target_core_attr_dev_info.attr,
1980 &target_core_attr_dev_control.attr,
1981 &target_core_attr_dev_alias.attr,
1982 &target_core_attr_dev_udev_path.attr,
1983 &target_core_attr_dev_enable.attr,
1984 &target_core_attr_dev_alua_lu_gp.attr,
1985 NULL,
1986};
1987
1988static void target_core_dev_release(struct config_item *item)
1989{
1990 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
1991 struct se_subsystem_dev, se_dev_group);
1992 struct se_hba *hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
1993 struct se_subsystem_api *t = hba->transport;
1994 struct config_group *dev_cg = &se_dev->se_dev_group;
1995
1996 kfree(dev_cg->default_groups);
1997 /*
1998 * This pointer will set when the storage is enabled with:
1999 *`echo 1 > $CONFIGFS/core/$HBA/$DEV/dev_enable`
2000 */
2001 if (se_dev->se_dev_ptr) {
2002 pr_debug("Target_Core_ConfigFS: Calling se_free_"
2003 "virtual_device() for se_dev_ptr: %p\n",
2004 se_dev->se_dev_ptr);
2005
2006 se_free_virtual_device(se_dev->se_dev_ptr, hba);
2007 } else {
2008 /*
2009 * Release struct se_subsystem_dev->se_dev_su_ptr..
2010 */
2011 pr_debug("Target_Core_ConfigFS: Calling t->free_"
2012 "device() for se_dev_su_ptr: %p\n",
2013 se_dev->se_dev_su_ptr);
2014
2015 t->free_device(se_dev->se_dev_su_ptr);
2016 }
2017
2018 pr_debug("Target_Core_ConfigFS: Deallocating se_subsystem"
2019 "_dev_t: %p\n", se_dev);
2020 kfree(se_dev);
2021}
2022
2023static ssize_t target_core_dev_show(struct config_item *item,
2024 struct configfs_attribute *attr,
2025 char *page)
2026{
2027 struct se_subsystem_dev *se_dev = container_of(
2028 to_config_group(item), struct se_subsystem_dev,
2029 se_dev_group);
2030 struct target_core_configfs_attribute *tc_attr = container_of(
2031 attr, struct target_core_configfs_attribute, attr);
2032
2033 if (!tc_attr->show)
2034 return -EINVAL;
2035
2036 return tc_attr->show(se_dev, page);
2037}
2038
2039static ssize_t target_core_dev_store(struct config_item *item,
2040 struct configfs_attribute *attr,
2041 const char *page, size_t count)
2042{
2043 struct se_subsystem_dev *se_dev = container_of(
2044 to_config_group(item), struct se_subsystem_dev,
2045 se_dev_group);
2046 struct target_core_configfs_attribute *tc_attr = container_of(
2047 attr, struct target_core_configfs_attribute, attr);
2048
2049 if (!tc_attr->store)
2050 return -EINVAL;
2051
2052 return tc_attr->store(se_dev, page, count);
2053}
2054
2055static struct configfs_item_operations target_core_dev_item_ops = {
2056 .release = target_core_dev_release,
2057 .show_attribute = target_core_dev_show,
2058 .store_attribute = target_core_dev_store,
2059};
2060
2061static struct config_item_type target_core_dev_cit = {
2062 .ct_item_ops = &target_core_dev_item_ops,
2063 .ct_attrs = lio_core_dev_attrs,
2064 .ct_owner = THIS_MODULE,
2065};
2066
2067/* End functions for struct config_item_type target_core_dev_cit */
2068
2069/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2070
2071CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2072#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2073static struct target_core_alua_lu_gp_attribute \
2074 target_core_alua_lu_gp_##_name = \
2075 __CONFIGFS_EATTR(_name, _mode, \
2076 target_core_alua_lu_gp_show_attr_##_name, \
2077 target_core_alua_lu_gp_store_attr_##_name);
2078
2079#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2080static struct target_core_alua_lu_gp_attribute \
2081 target_core_alua_lu_gp_##_name = \
2082 __CONFIGFS_EATTR_RO(_name, \
2083 target_core_alua_lu_gp_show_attr_##_name);
2084
2085/*
2086 * lu_gp_id
2087 */
2088static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2089 struct t10_alua_lu_gp *lu_gp,
2090 char *page)
2091{
2092 if (!lu_gp->lu_gp_valid_id)
2093 return 0;
2094
2095 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2096}
2097
2098static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2099 struct t10_alua_lu_gp *lu_gp,
2100 const char *page,
2101 size_t count)
2102{
2103 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2104 unsigned long lu_gp_id;
2105 int ret;
2106
2107 ret = strict_strtoul(page, 0, &lu_gp_id);
2108 if (ret < 0) {
2109 pr_err("strict_strtoul() returned %d for"
2110 " lu_gp_id\n", ret);
2111 return -EINVAL;
2112 }
2113 if (lu_gp_id > 0x0000ffff) {
2114 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2115 " 0x0000ffff\n", lu_gp_id);
2116 return -EINVAL;
2117 }
2118
2119 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2120 if (ret < 0)
2121 return -EINVAL;
2122
2123 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2124 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2125 config_item_name(&alua_lu_gp_cg->cg_item),
2126 lu_gp->lu_gp_id);
2127
2128 return count;
2129}
2130
2131SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2132
2133/*
2134 * members
2135 */
2136static ssize_t target_core_alua_lu_gp_show_attr_members(
2137 struct t10_alua_lu_gp *lu_gp,
2138 char *page)
2139{
2140 struct se_device *dev;
2141 struct se_hba *hba;
2142 struct se_subsystem_dev *su_dev;
2143 struct t10_alua_lu_gp_member *lu_gp_mem;
2144 ssize_t len = 0, cur_len;
2145 unsigned char buf[LU_GROUP_NAME_BUF];
2146
2147 memset(buf, 0, LU_GROUP_NAME_BUF);
2148
2149 spin_lock(&lu_gp->lu_gp_lock);
2150 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2151 dev = lu_gp_mem->lu_gp_mem_dev;
2152 su_dev = dev->se_sub_dev;
2153 hba = su_dev->se_dev_hba;
2154
2155 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2156 config_item_name(&hba->hba_group.cg_item),
2157 config_item_name(&su_dev->se_dev_group.cg_item));
2158 cur_len++; /* Extra byte for NULL terminator */
2159
2160 if ((cur_len + len) > PAGE_SIZE) {
2161 pr_warn("Ran out of lu_gp_show_attr"
2162 "_members buffer\n");
2163 break;
2164 }
2165 memcpy(page+len, buf, cur_len);
2166 len += cur_len;
2167 }
2168 spin_unlock(&lu_gp->lu_gp_lock);
2169
2170 return len;
2171}
2172
2173SE_DEV_ALUA_LU_ATTR_RO(members);
2174
2175CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2176
2177static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2178 &target_core_alua_lu_gp_lu_gp_id.attr,
2179 &target_core_alua_lu_gp_members.attr,
2180 NULL,
2181};
2182
2183static void target_core_alua_lu_gp_release(struct config_item *item)
2184{
2185 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2186 struct t10_alua_lu_gp, lu_gp_group);
2187
2188 core_alua_free_lu_gp(lu_gp);
2189}
2190
2191static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2192 .release = target_core_alua_lu_gp_release,
2193 .show_attribute = target_core_alua_lu_gp_attr_show,
2194 .store_attribute = target_core_alua_lu_gp_attr_store,
2195};
2196
2197static struct config_item_type target_core_alua_lu_gp_cit = {
2198 .ct_item_ops = &target_core_alua_lu_gp_ops,
2199 .ct_attrs = target_core_alua_lu_gp_attrs,
2200 .ct_owner = THIS_MODULE,
2201};
2202
2203/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2204
2205/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2206
2207static struct config_group *target_core_alua_create_lu_gp(
2208 struct config_group *group,
2209 const char *name)
2210{
2211 struct t10_alua_lu_gp *lu_gp;
2212 struct config_group *alua_lu_gp_cg = NULL;
2213 struct config_item *alua_lu_gp_ci = NULL;
2214
2215 lu_gp = core_alua_allocate_lu_gp(name, 0);
2216 if (IS_ERR(lu_gp))
2217 return NULL;
2218
2219 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2220 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2221
2222 config_group_init_type_name(alua_lu_gp_cg, name,
2223 &target_core_alua_lu_gp_cit);
2224
2225 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2226 " Group: core/alua/lu_gps/%s\n",
2227 config_item_name(alua_lu_gp_ci));
2228
2229 return alua_lu_gp_cg;
2230
2231}
2232
2233static void target_core_alua_drop_lu_gp(
2234 struct config_group *group,
2235 struct config_item *item)
2236{
2237 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2238 struct t10_alua_lu_gp, lu_gp_group);
2239
2240 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2241 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2242 config_item_name(item), lu_gp->lu_gp_id);
2243 /*
2244 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2245 * -> target_core_alua_lu_gp_release()
2246 */
2247 config_item_put(item);
2248}
2249
2250static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2251 .make_group = &target_core_alua_create_lu_gp,
2252 .drop_item = &target_core_alua_drop_lu_gp,
2253};
2254
2255static struct config_item_type target_core_alua_lu_gps_cit = {
2256 .ct_item_ops = NULL,
2257 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2258 .ct_owner = THIS_MODULE,
2259};
2260
2261/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2262
2263/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2264
2265CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2266#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2267static struct target_core_alua_tg_pt_gp_attribute \
2268 target_core_alua_tg_pt_gp_##_name = \
2269 __CONFIGFS_EATTR(_name, _mode, \
2270 target_core_alua_tg_pt_gp_show_attr_##_name, \
2271 target_core_alua_tg_pt_gp_store_attr_##_name);
2272
2273#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2274static struct target_core_alua_tg_pt_gp_attribute \
2275 target_core_alua_tg_pt_gp_##_name = \
2276 __CONFIGFS_EATTR_RO(_name, \
2277 target_core_alua_tg_pt_gp_show_attr_##_name);
2278
2279/*
2280 * alua_access_state
2281 */
2282static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2283 struct t10_alua_tg_pt_gp *tg_pt_gp,
2284 char *page)
2285{
2286 return sprintf(page, "%d\n",
2287 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2288}
2289
2290static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2291 struct t10_alua_tg_pt_gp *tg_pt_gp,
2292 const char *page,
2293 size_t count)
2294{
2295 struct se_subsystem_dev *su_dev = tg_pt_gp->tg_pt_gp_su_dev;
2296 unsigned long tmp;
2297 int new_state, ret;
2298
2299 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2300 pr_err("Unable to do implict ALUA on non valid"
2301 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2302 return -EINVAL;
2303 }
2304
2305 ret = strict_strtoul(page, 0, &tmp);
2306 if (ret < 0) {
2307 pr_err("Unable to extract new ALUA access state from"
2308 " %s\n", page);
2309 return -EINVAL;
2310 }
2311 new_state = (int)tmp;
2312
2313 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICT_ALUA)) {
2314 pr_err("Unable to process implict configfs ALUA"
2315 " transition while TPGS_IMPLICT_ALUA is diabled\n");
2316 return -EINVAL;
2317 }
2318
2319 ret = core_alua_do_port_transition(tg_pt_gp, su_dev->se_dev_ptr,
2320 NULL, NULL, new_state, 0);
2321 return (!ret) ? count : -EINVAL;
2322}
2323
2324SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2325
2326/*
2327 * alua_access_status
2328 */
2329static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2330 struct t10_alua_tg_pt_gp *tg_pt_gp,
2331 char *page)
2332{
2333 return sprintf(page, "%s\n",
2334 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2335}
2336
2337static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2338 struct t10_alua_tg_pt_gp *tg_pt_gp,
2339 const char *page,
2340 size_t count)
2341{
2342 unsigned long tmp;
2343 int new_status, ret;
2344
2345 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2346 pr_err("Unable to do set ALUA access status on non"
2347 " valid tg_pt_gp ID: %hu\n",
2348 tg_pt_gp->tg_pt_gp_valid_id);
2349 return -EINVAL;
2350 }
2351
2352 ret = strict_strtoul(page, 0, &tmp);
2353 if (ret < 0) {
2354 pr_err("Unable to extract new ALUA access status"
2355 " from %s\n", page);
2356 return -EINVAL;
2357 }
2358 new_status = (int)tmp;
2359
2360 if ((new_status != ALUA_STATUS_NONE) &&
2361 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICT_STPG) &&
2362 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA)) {
2363 pr_err("Illegal ALUA access status: 0x%02x\n",
2364 new_status);
2365 return -EINVAL;
2366 }
2367
2368 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2369 return count;
2370}
2371
2372SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2373
2374/*
2375 * alua_access_type
2376 */
2377static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2378 struct t10_alua_tg_pt_gp *tg_pt_gp,
2379 char *page)
2380{
2381 return core_alua_show_access_type(tg_pt_gp, page);
2382}
2383
2384static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2385 struct t10_alua_tg_pt_gp *tg_pt_gp,
2386 const char *page,
2387 size_t count)
2388{
2389 return core_alua_store_access_type(tg_pt_gp, page, count);
2390}
2391
2392SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2393
2394/*
2395 * alua_write_metadata
2396 */
2397static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2398 struct t10_alua_tg_pt_gp *tg_pt_gp,
2399 char *page)
2400{
2401 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2402}
2403
2404static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2405 struct t10_alua_tg_pt_gp *tg_pt_gp,
2406 const char *page,
2407 size_t count)
2408{
2409 unsigned long tmp;
2410 int ret;
2411
2412 ret = strict_strtoul(page, 0, &tmp);
2413 if (ret < 0) {
2414 pr_err("Unable to extract alua_write_metadata\n");
2415 return -EINVAL;
2416 }
2417
2418 if ((tmp != 0) && (tmp != 1)) {
2419 pr_err("Illegal value for alua_write_metadata:"
2420 " %lu\n", tmp);
2421 return -EINVAL;
2422 }
2423 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2424
2425 return count;
2426}
2427
2428SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2429
2430
2431
2432/*
2433 * nonop_delay_msecs
2434 */
2435static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2436 struct t10_alua_tg_pt_gp *tg_pt_gp,
2437 char *page)
2438{
2439 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2440
2441}
2442
2443static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2444 struct t10_alua_tg_pt_gp *tg_pt_gp,
2445 const char *page,
2446 size_t count)
2447{
2448 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2449}
2450
2451SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2452
2453/*
2454 * trans_delay_msecs
2455 */
2456static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2457 struct t10_alua_tg_pt_gp *tg_pt_gp,
2458 char *page)
2459{
2460 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2461}
2462
2463static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2464 struct t10_alua_tg_pt_gp *tg_pt_gp,
2465 const char *page,
2466 size_t count)
2467{
2468 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2469}
2470
2471SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2472
2473/*
2474 * preferred
2475 */
2476
2477static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2478 struct t10_alua_tg_pt_gp *tg_pt_gp,
2479 char *page)
2480{
2481 return core_alua_show_preferred_bit(tg_pt_gp, page);
2482}
2483
2484static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2485 struct t10_alua_tg_pt_gp *tg_pt_gp,
2486 const char *page,
2487 size_t count)
2488{
2489 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2490}
2491
2492SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2493
2494/*
2495 * tg_pt_gp_id
2496 */
2497static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2498 struct t10_alua_tg_pt_gp *tg_pt_gp,
2499 char *page)
2500{
2501 if (!tg_pt_gp->tg_pt_gp_valid_id)
2502 return 0;
2503
2504 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2505}
2506
2507static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2508 struct t10_alua_tg_pt_gp *tg_pt_gp,
2509 const char *page,
2510 size_t count)
2511{
2512 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2513 unsigned long tg_pt_gp_id;
2514 int ret;
2515
2516 ret = strict_strtoul(page, 0, &tg_pt_gp_id);
2517 if (ret < 0) {
2518 pr_err("strict_strtoul() returned %d for"
2519 " tg_pt_gp_id\n", ret);
2520 return -EINVAL;
2521 }
2522 if (tg_pt_gp_id > 0x0000ffff) {
2523 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2524 " 0x0000ffff\n", tg_pt_gp_id);
2525 return -EINVAL;
2526 }
2527
2528 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2529 if (ret < 0)
2530 return -EINVAL;
2531
2532 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2533 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2534 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2535 tg_pt_gp->tg_pt_gp_id);
2536
2537 return count;
2538}
2539
2540SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2541
2542/*
2543 * members
2544 */
2545static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2546 struct t10_alua_tg_pt_gp *tg_pt_gp,
2547 char *page)
2548{
2549 struct se_port *port;
2550 struct se_portal_group *tpg;
2551 struct se_lun *lun;
2552 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2553 ssize_t len = 0, cur_len;
2554 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2555
2556 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2557
2558 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2559 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2560 tg_pt_gp_mem_list) {
2561 port = tg_pt_gp_mem->tg_pt;
2562 tpg = port->sep_tpg;
2563 lun = port->sep_lun;
2564
2565 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2566 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2567 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2568 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2569 config_item_name(&lun->lun_group.cg_item));
2570 cur_len++; /* Extra byte for NULL terminator */
2571
2572 if ((cur_len + len) > PAGE_SIZE) {
2573 pr_warn("Ran out of lu_gp_show_attr"
2574 "_members buffer\n");
2575 break;
2576 }
2577 memcpy(page+len, buf, cur_len);
2578 len += cur_len;
2579 }
2580 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2581
2582 return len;
2583}
2584
2585SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2586
2587CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2588 tg_pt_gp_group);
2589
2590static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2591 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2592 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2593 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2594 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2595 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2596 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2597 &target_core_alua_tg_pt_gp_preferred.attr,
2598 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2599 &target_core_alua_tg_pt_gp_members.attr,
2600 NULL,
2601};
2602
2603static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2604{
2605 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2606 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2607
2608 core_alua_free_tg_pt_gp(tg_pt_gp);
2609}
2610
2611static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2612 .release = target_core_alua_tg_pt_gp_release,
2613 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2614 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2615};
2616
2617static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2618 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2619 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2620 .ct_owner = THIS_MODULE,
2621};
2622
2623/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2624
2625/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2626
2627static struct config_group *target_core_alua_create_tg_pt_gp(
2628 struct config_group *group,
2629 const char *name)
2630{
2631 struct t10_alua *alua = container_of(group, struct t10_alua,
2632 alua_tg_pt_gps_group);
2633 struct t10_alua_tg_pt_gp *tg_pt_gp;
2634 struct se_subsystem_dev *su_dev = alua->t10_sub_dev;
2635 struct config_group *alua_tg_pt_gp_cg = NULL;
2636 struct config_item *alua_tg_pt_gp_ci = NULL;
2637
2638 tg_pt_gp = core_alua_allocate_tg_pt_gp(su_dev, name, 0);
2639 if (!tg_pt_gp)
2640 return NULL;
2641
2642 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2643 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2644
2645 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2646 &target_core_alua_tg_pt_gp_cit);
2647
2648 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2649 " Group: alua/tg_pt_gps/%s\n",
2650 config_item_name(alua_tg_pt_gp_ci));
2651
2652 return alua_tg_pt_gp_cg;
2653}
2654
2655static void target_core_alua_drop_tg_pt_gp(
2656 struct config_group *group,
2657 struct config_item *item)
2658{
2659 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2660 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2661
2662 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2663 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2664 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2665 /*
2666 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2667 * -> target_core_alua_tg_pt_gp_release().
2668 */
2669 config_item_put(item);
2670}
2671
2672static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2673 .make_group = &target_core_alua_create_tg_pt_gp,
2674 .drop_item = &target_core_alua_drop_tg_pt_gp,
2675};
2676
2677static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2678 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2679 .ct_owner = THIS_MODULE,
2680};
2681
2682/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2683
2684/* Start functions for struct config_item_type target_core_alua_cit */
2685
2686/*
2687 * target_core_alua_cit is a ConfigFS group that lives under
2688 * /sys/kernel/config/target/core/alua. There are default groups
2689 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2690 * target_core_alua_cit in target_core_init_configfs() below.
2691 */
2692static struct config_item_type target_core_alua_cit = {
2693 .ct_item_ops = NULL,
2694 .ct_attrs = NULL,
2695 .ct_owner = THIS_MODULE,
2696};
2697
2698/* End functions for struct config_item_type target_core_alua_cit */
2699
2700/* Start functions for struct config_item_type target_core_stat_cit */
2701
2702static struct config_group *target_core_stat_mkdir(
2703 struct config_group *group,
2704 const char *name)
2705{
2706 return ERR_PTR(-ENOSYS);
2707}
2708
2709static void target_core_stat_rmdir(
2710 struct config_group *group,
2711 struct config_item *item)
2712{
2713 return;
2714}
2715
2716static struct configfs_group_operations target_core_stat_group_ops = {
2717 .make_group = &target_core_stat_mkdir,
2718 .drop_item = &target_core_stat_rmdir,
2719};
2720
2721static struct config_item_type target_core_stat_cit = {
2722 .ct_group_ops = &target_core_stat_group_ops,
2723 .ct_owner = THIS_MODULE,
2724};
2725
2726/* End functions for struct config_item_type target_core_stat_cit */
2727
2728/* Start functions for struct config_item_type target_core_hba_cit */
2729
2730static struct config_group *target_core_make_subdev(
2731 struct config_group *group,
2732 const char *name)
2733{
2734 struct t10_alua_tg_pt_gp *tg_pt_gp;
2735 struct se_subsystem_dev *se_dev;
2736 struct se_subsystem_api *t;
2737 struct config_item *hba_ci = &group->cg_item;
2738 struct se_hba *hba = item_to_hba(hba_ci);
2739 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2740 struct config_group *dev_stat_grp = NULL;
2741 int errno = -ENOMEM, ret;
2742
2743 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2744 if (ret)
2745 return ERR_PTR(ret);
2746 /*
2747 * Locate the struct se_subsystem_api from parent's struct se_hba.
2748 */
2749 t = hba->transport;
2750
2751 se_dev = kzalloc(sizeof(struct se_subsystem_dev), GFP_KERNEL);
2752 if (!se_dev) {
2753 pr_err("Unable to allocate memory for"
2754 " struct se_subsystem_dev\n");
2755 goto unlock;
2756 }
2757 INIT_LIST_HEAD(&se_dev->se_dev_node);
2758 INIT_LIST_HEAD(&se_dev->t10_wwn.t10_vpd_list);
2759 spin_lock_init(&se_dev->t10_wwn.t10_vpd_lock);
2760 INIT_LIST_HEAD(&se_dev->t10_pr.registration_list);
2761 INIT_LIST_HEAD(&se_dev->t10_pr.aptpl_reg_list);
2762 spin_lock_init(&se_dev->t10_pr.registration_lock);
2763 spin_lock_init(&se_dev->t10_pr.aptpl_reg_lock);
2764 INIT_LIST_HEAD(&se_dev->t10_alua.tg_pt_gps_list);
2765 spin_lock_init(&se_dev->t10_alua.tg_pt_gps_lock);
2766 spin_lock_init(&se_dev->se_dev_lock);
2767 se_dev->t10_pr.pr_aptpl_buf_len = PR_APTPL_BUF_LEN;
2768 se_dev->t10_wwn.t10_sub_dev = se_dev;
2769 se_dev->t10_alua.t10_sub_dev = se_dev;
2770 se_dev->se_dev_attrib.da_sub_dev = se_dev;
2771
2772 se_dev->se_dev_hba = hba;
2773 dev_cg = &se_dev->se_dev_group;
2774
2775 dev_cg->default_groups = kzalloc(sizeof(struct config_group) * 7,
2776 GFP_KERNEL);
2777 if (!dev_cg->default_groups)
2778 goto out;
2779 /*
2780 * Set se_dev_su_ptr from struct se_subsystem_api returned void ptr
2781 * for ->allocate_virtdevice()
2782 *
2783 * se_dev->se_dev_ptr will be set after ->create_virtdev()
2784 * has been called successfully in the next level up in the
2785 * configfs tree for device object's struct config_group.
2786 */
2787 se_dev->se_dev_su_ptr = t->allocate_virtdevice(hba, name);
2788 if (!se_dev->se_dev_su_ptr) {
2789 pr_err("Unable to locate subsystem dependent pointer"
2790 " from allocate_virtdevice()\n");
2791 goto out;
2792 }
2793 spin_lock(&se_device_lock);
2794 list_add_tail(&se_dev->se_dev_node, &se_dev_list);
2795 spin_unlock(&se_device_lock);
2796
2797 config_group_init_type_name(&se_dev->se_dev_group, name,
2798 &target_core_dev_cit);
2799 config_group_init_type_name(&se_dev->se_dev_attrib.da_group, "attrib",
2800 &target_core_dev_attrib_cit);
2801 config_group_init_type_name(&se_dev->se_dev_pr_group, "pr",
2802 &target_core_dev_pr_cit);
2803 config_group_init_type_name(&se_dev->t10_wwn.t10_wwn_group, "wwn",
2804 &target_core_dev_wwn_cit);
2805 config_group_init_type_name(&se_dev->t10_alua.alua_tg_pt_gps_group,
2806 "alua", &target_core_alua_tg_pt_gps_cit);
2807 config_group_init_type_name(&se_dev->dev_stat_grps.stat_group,
2808 "statistics", &target_core_stat_cit);
2809
2810 dev_cg->default_groups[0] = &se_dev->se_dev_attrib.da_group;
2811 dev_cg->default_groups[1] = &se_dev->se_dev_pr_group;
2812 dev_cg->default_groups[2] = &se_dev->t10_wwn.t10_wwn_group;
2813 dev_cg->default_groups[3] = &se_dev->t10_alua.alua_tg_pt_gps_group;
2814 dev_cg->default_groups[4] = &se_dev->dev_stat_grps.stat_group;
2815 dev_cg->default_groups[5] = NULL;
2816 /*
2817 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2818 */
2819 tg_pt_gp = core_alua_allocate_tg_pt_gp(se_dev, "default_tg_pt_gp", 1);
2820 if (!tg_pt_gp)
2821 goto out;
2822
2823 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2824 tg_pt_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
2825 GFP_KERNEL);
2826 if (!tg_pt_gp_cg->default_groups) {
2827 pr_err("Unable to allocate tg_pt_gp_cg->"
2828 "default_groups\n");
2829 goto out;
2830 }
2831
2832 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2833 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2834 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2835 tg_pt_gp_cg->default_groups[1] = NULL;
2836 se_dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2837 /*
2838 * Add core/$HBA/$DEV/statistics/ default groups
2839 */
2840 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2841 dev_stat_grp->default_groups = kzalloc(sizeof(struct config_group) * 4,
2842 GFP_KERNEL);
2843 if (!dev_stat_grp->default_groups) {
2844 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2845 goto out;
2846 }
2847 target_stat_setup_dev_default_groups(se_dev);
2848
2849 pr_debug("Target_Core_ConfigFS: Allocated struct se_subsystem_dev:"
2850 " %p se_dev_su_ptr: %p\n", se_dev, se_dev->se_dev_su_ptr);
2851
2852 mutex_unlock(&hba->hba_access_mutex);
2853 return &se_dev->se_dev_group;
2854out:
2855 if (se_dev->t10_alua.default_tg_pt_gp) {
2856 core_alua_free_tg_pt_gp(se_dev->t10_alua.default_tg_pt_gp);
2857 se_dev->t10_alua.default_tg_pt_gp = NULL;
2858 }
2859 if (dev_stat_grp)
2860 kfree(dev_stat_grp->default_groups);
2861 if (tg_pt_gp_cg)
2862 kfree(tg_pt_gp_cg->default_groups);
2863 if (dev_cg)
2864 kfree(dev_cg->default_groups);
2865 if (se_dev->se_dev_su_ptr)
2866 t->free_device(se_dev->se_dev_su_ptr);
2867 kfree(se_dev);
2868unlock:
2869 mutex_unlock(&hba->hba_access_mutex);
2870 return ERR_PTR(errno);
2871}
2872
2873static void target_core_drop_subdev(
2874 struct config_group *group,
2875 struct config_item *item)
2876{
2877 struct se_subsystem_dev *se_dev = container_of(to_config_group(item),
2878 struct se_subsystem_dev, se_dev_group);
2879 struct se_hba *hba;
2880 struct se_subsystem_api *t;
2881 struct config_item *df_item;
2882 struct config_group *dev_cg, *tg_pt_gp_cg, *dev_stat_grp;
2883 int i;
2884
2885 hba = item_to_hba(&se_dev->se_dev_hba->hba_group.cg_item);
2886
2887 mutex_lock(&hba->hba_access_mutex);
2888 t = hba->transport;
2889
2890 spin_lock(&se_device_lock);
2891 list_del(&se_dev->se_dev_node);
2892 spin_unlock(&se_device_lock);
2893
2894 dev_stat_grp = &se_dev->dev_stat_grps.stat_group;
2895 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2896 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2897 dev_stat_grp->default_groups[i] = NULL;
2898 config_item_put(df_item);
2899 }
2900 kfree(dev_stat_grp->default_groups);
2901
2902 tg_pt_gp_cg = &se_dev->t10_alua.alua_tg_pt_gps_group;
2903 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2904 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2905 tg_pt_gp_cg->default_groups[i] = NULL;
2906 config_item_put(df_item);
2907 }
2908 kfree(tg_pt_gp_cg->default_groups);
2909 /*
2910 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2911 * directly from target_core_alua_tg_pt_gp_release().
2912 */
2913 se_dev->t10_alua.default_tg_pt_gp = NULL;
2914
2915 dev_cg = &se_dev->se_dev_group;
2916 for (i = 0; dev_cg->default_groups[i]; i++) {
2917 df_item = &dev_cg->default_groups[i]->cg_item;
2918 dev_cg->default_groups[i] = NULL;
2919 config_item_put(df_item);
2920 }
2921 /*
2922 * The releasing of se_dev and associated se_dev->se_dev_ptr is done
2923 * from target_core_dev_item_ops->release() ->target_core_dev_release().
2924 */
2925 config_item_put(item);
2926 mutex_unlock(&hba->hba_access_mutex);
2927}
2928
2929static struct configfs_group_operations target_core_hba_group_ops = {
2930 .make_group = target_core_make_subdev,
2931 .drop_item = target_core_drop_subdev,
2932};
2933
2934CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2935#define SE_HBA_ATTR(_name, _mode) \
2936static struct target_core_hba_attribute \
2937 target_core_hba_##_name = \
2938 __CONFIGFS_EATTR(_name, _mode, \
2939 target_core_hba_show_attr_##_name, \
2940 target_core_hba_store_attr_##_name);
2941
2942#define SE_HBA_ATTR_RO(_name) \
2943static struct target_core_hba_attribute \
2944 target_core_hba_##_name = \
2945 __CONFIGFS_EATTR_RO(_name, \
2946 target_core_hba_show_attr_##_name);
2947
2948static ssize_t target_core_hba_show_attr_hba_info(
2949 struct se_hba *hba,
2950 char *page)
2951{
2952 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2953 hba->hba_id, hba->transport->name,
2954 TARGET_CORE_CONFIGFS_VERSION);
2955}
2956
2957SE_HBA_ATTR_RO(hba_info);
2958
2959static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2960 char *page)
2961{
2962 int hba_mode = 0;
2963
2964 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2965 hba_mode = 1;
2966
2967 return sprintf(page, "%d\n", hba_mode);
2968}
2969
2970static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2971 const char *page, size_t count)
2972{
2973 struct se_subsystem_api *transport = hba->transport;
2974 unsigned long mode_flag;
2975 int ret;
2976
2977 if (transport->pmode_enable_hba == NULL)
2978 return -EINVAL;
2979
2980 ret = strict_strtoul(page, 0, &mode_flag);
2981 if (ret < 0) {
2982 pr_err("Unable to extract hba mode flag: %d\n", ret);
2983 return -EINVAL;
2984 }
2985
2986 spin_lock(&hba->device_lock);
2987 if (!list_empty(&hba->hba_dev_list)) {
2988 pr_err("Unable to set hba_mode with active devices\n");
2989 spin_unlock(&hba->device_lock);
2990 return -EINVAL;
2991 }
2992 spin_unlock(&hba->device_lock);
2993
2994 ret = transport->pmode_enable_hba(hba, mode_flag);
2995 if (ret < 0)
2996 return -EINVAL;
2997 if (ret > 0)
2998 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2999 else if (ret == 0)
3000 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3001
3002 return count;
3003}
3004
3005SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3006
3007CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3008
3009static void target_core_hba_release(struct config_item *item)
3010{
3011 struct se_hba *hba = container_of(to_config_group(item),
3012 struct se_hba, hba_group);
3013 core_delete_hba(hba);
3014}
3015
3016static struct configfs_attribute *target_core_hba_attrs[] = {
3017 &target_core_hba_hba_info.attr,
3018 &target_core_hba_hba_mode.attr,
3019 NULL,
3020};
3021
3022static struct configfs_item_operations target_core_hba_item_ops = {
3023 .release = target_core_hba_release,
3024 .show_attribute = target_core_hba_attr_show,
3025 .store_attribute = target_core_hba_attr_store,
3026};
3027
3028static struct config_item_type target_core_hba_cit = {
3029 .ct_item_ops = &target_core_hba_item_ops,
3030 .ct_group_ops = &target_core_hba_group_ops,
3031 .ct_attrs = target_core_hba_attrs,
3032 .ct_owner = THIS_MODULE,
3033};
3034
3035static struct config_group *target_core_call_addhbatotarget(
3036 struct config_group *group,
3037 const char *name)
3038{
3039 char *se_plugin_str, *str, *str2;
3040 struct se_hba *hba;
3041 char buf[TARGET_CORE_NAME_MAX_LEN];
3042 unsigned long plugin_dep_id = 0;
3043 int ret;
3044
3045 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3046 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3047 pr_err("Passed *name strlen(): %d exceeds"
3048 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3049 TARGET_CORE_NAME_MAX_LEN);
3050 return ERR_PTR(-ENAMETOOLONG);
3051 }
3052 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3053
3054 str = strstr(buf, "_");
3055 if (!str) {
3056 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3057 return ERR_PTR(-EINVAL);
3058 }
3059 se_plugin_str = buf;
3060 /*
3061 * Special case for subsystem plugins that have "_" in their names.
3062 * Namely rd_direct and rd_mcp..
3063 */
3064 str2 = strstr(str+1, "_");
3065 if (str2) {
3066 *str2 = '\0'; /* Terminate for *se_plugin_str */
3067 str2++; /* Skip to start of plugin dependent ID */
3068 str = str2;
3069 } else {
3070 *str = '\0'; /* Terminate for *se_plugin_str */
3071 str++; /* Skip to start of plugin dependent ID */
3072 }
3073
3074 ret = strict_strtoul(str, 0, &plugin_dep_id);
3075 if (ret < 0) {
3076 pr_err("strict_strtoul() returned %d for"
3077 " plugin_dep_id\n", ret);
3078 return ERR_PTR(-EINVAL);
3079 }
3080 /*
3081 * Load up TCM subsystem plugins if they have not already been loaded.
3082 */
3083 if (transport_subsystem_check_init() < 0)
3084 return ERR_PTR(-EINVAL);
3085
3086 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3087 if (IS_ERR(hba))
3088 return ERR_CAST(hba);
3089
3090 config_group_init_type_name(&hba->hba_group, name,
3091 &target_core_hba_cit);
3092
3093 return &hba->hba_group;
3094}
3095
3096static void target_core_call_delhbafromtarget(
3097 struct config_group *group,
3098 struct config_item *item)
3099{
3100 /*
3101 * core_delete_hba() is called from target_core_hba_item_ops->release()
3102 * -> target_core_hba_release()
3103 */
3104 config_item_put(item);
3105}
3106
3107static struct configfs_group_operations target_core_group_ops = {
3108 .make_group = target_core_call_addhbatotarget,
3109 .drop_item = target_core_call_delhbafromtarget,
3110};
3111
3112static struct config_item_type target_core_cit = {
3113 .ct_item_ops = NULL,
3114 .ct_group_ops = &target_core_group_ops,
3115 .ct_attrs = NULL,
3116 .ct_owner = THIS_MODULE,
3117};
3118
3119/* Stop functions for struct config_item_type target_core_hba_cit */
3120
3121static int __init target_core_init_configfs(void)
3122{
3123 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3124 struct config_group *lu_gp_cg = NULL;
3125 struct configfs_subsystem *subsys;
3126 struct t10_alua_lu_gp *lu_gp;
3127 int ret;
3128
3129 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3130 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3131 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3132
3133 subsys = target_core_subsystem[0];
3134 config_group_init(&subsys->su_group);
3135 mutex_init(&subsys->su_mutex);
3136
3137 INIT_LIST_HEAD(&g_tf_list);
3138 mutex_init(&g_tf_lock);
3139 ret = init_se_kmem_caches();
3140 if (ret < 0)
3141 return ret;
3142 /*
3143 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3144 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3145 */
3146 target_cg = &subsys->su_group;
3147 target_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3148 GFP_KERNEL);
3149 if (!target_cg->default_groups) {
3150 pr_err("Unable to allocate target_cg->default_groups\n");
3151 goto out_global;
3152 }
3153
3154 config_group_init_type_name(&target_core_hbagroup,
3155 "core", &target_core_cit);
3156 target_cg->default_groups[0] = &target_core_hbagroup;
3157 target_cg->default_groups[1] = NULL;
3158 /*
3159 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3160 */
3161 hba_cg = &target_core_hbagroup;
3162 hba_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3163 GFP_KERNEL);
3164 if (!hba_cg->default_groups) {
3165 pr_err("Unable to allocate hba_cg->default_groups\n");
3166 goto out_global;
3167 }
3168 config_group_init_type_name(&alua_group,
3169 "alua", &target_core_alua_cit);
3170 hba_cg->default_groups[0] = &alua_group;
3171 hba_cg->default_groups[1] = NULL;
3172 /*
3173 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3174 * groups under /sys/kernel/config/target/core/alua/
3175 */
3176 alua_cg = &alua_group;
3177 alua_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3178 GFP_KERNEL);
3179 if (!alua_cg->default_groups) {
3180 pr_err("Unable to allocate alua_cg->default_groups\n");
3181 goto out_global;
3182 }
3183
3184 config_group_init_type_name(&alua_lu_gps_group,
3185 "lu_gps", &target_core_alua_lu_gps_cit);
3186 alua_cg->default_groups[0] = &alua_lu_gps_group;
3187 alua_cg->default_groups[1] = NULL;
3188 /*
3189 * Add core/alua/lu_gps/default_lu_gp
3190 */
3191 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3192 if (IS_ERR(lu_gp))
3193 goto out_global;
3194
3195 lu_gp_cg = &alua_lu_gps_group;
3196 lu_gp_cg->default_groups = kzalloc(sizeof(struct config_group) * 2,
3197 GFP_KERNEL);
3198 if (!lu_gp_cg->default_groups) {
3199 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3200 goto out_global;
3201 }
3202
3203 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3204 &target_core_alua_lu_gp_cit);
3205 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3206 lu_gp_cg->default_groups[1] = NULL;
3207 default_lu_gp = lu_gp;
3208 /*
3209 * Register the target_core_mod subsystem with configfs.
3210 */
3211 ret = configfs_register_subsystem(subsys);
3212 if (ret < 0) {
3213 pr_err("Error %d while registering subsystem %s\n",
3214 ret, subsys->su_group.cg_item.ci_namebuf);
3215 goto out_global;
3216 }
3217 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3218 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3219 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3220 /*
3221 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3222 */
3223 ret = rd_module_init();
3224 if (ret < 0)
3225 goto out;
3226
3227 if (core_dev_setup_virtual_lun0() < 0)
3228 goto out;
3229
3230 return 0;
3231
3232out:
3233 configfs_unregister_subsystem(subsys);
3234 core_dev_release_virtual_lun0();
3235 rd_module_exit();
3236out_global:
3237 if (default_lu_gp) {
3238 core_alua_free_lu_gp(default_lu_gp);
3239 default_lu_gp = NULL;
3240 }
3241 if (lu_gp_cg)
3242 kfree(lu_gp_cg->default_groups);
3243 if (alua_cg)
3244 kfree(alua_cg->default_groups);
3245 if (hba_cg)
3246 kfree(hba_cg->default_groups);
3247 kfree(target_cg->default_groups);
3248 release_se_kmem_caches();
3249 return ret;
3250}
3251
3252static void __exit target_core_exit_configfs(void)
3253{
3254 struct configfs_subsystem *subsys;
3255 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3256 struct config_item *item;
3257 int i;
3258
3259 subsys = target_core_subsystem[0];
3260
3261 lu_gp_cg = &alua_lu_gps_group;
3262 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3263 item = &lu_gp_cg->default_groups[i]->cg_item;
3264 lu_gp_cg->default_groups[i] = NULL;
3265 config_item_put(item);
3266 }
3267 kfree(lu_gp_cg->default_groups);
3268 lu_gp_cg->default_groups = NULL;
3269
3270 alua_cg = &alua_group;
3271 for (i = 0; alua_cg->default_groups[i]; i++) {
3272 item = &alua_cg->default_groups[i]->cg_item;
3273 alua_cg->default_groups[i] = NULL;
3274 config_item_put(item);
3275 }
3276 kfree(alua_cg->default_groups);
3277 alua_cg->default_groups = NULL;
3278
3279 hba_cg = &target_core_hbagroup;
3280 for (i = 0; hba_cg->default_groups[i]; i++) {
3281 item = &hba_cg->default_groups[i]->cg_item;
3282 hba_cg->default_groups[i] = NULL;
3283 config_item_put(item);
3284 }
3285 kfree(hba_cg->default_groups);
3286 hba_cg->default_groups = NULL;
3287 /*
3288 * We expect subsys->su_group.default_groups to be released
3289 * by configfs subsystem provider logic..
3290 */
3291 configfs_unregister_subsystem(subsys);
3292 kfree(subsys->su_group.default_groups);
3293
3294 core_alua_free_lu_gp(default_lu_gp);
3295 default_lu_gp = NULL;
3296
3297 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3298 " Infrastructure\n");
3299
3300 core_dev_release_virtual_lun0();
3301 rd_module_exit();
3302 release_se_kmem_caches();
3303}
3304
3305MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3306MODULE_AUTHOR("nab@Linux-iSCSI.org");
3307MODULE_LICENSE("GPL");
3308
3309module_init(target_core_init_configfs);
3310module_exit(target_core_exit_configfs);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*******************************************************************************
3 * Filename: target_core_configfs.c
4 *
5 * This file contains ConfigFS logic for the Generic Target Engine project.
6 *
7 * (c) Copyright 2008-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 ****************************************************************************/
14
15#include <linux/kstrtox.h>
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <generated/utsrelease.h>
19#include <linux/utsname.h>
20#include <linux/init.h>
21#include <linux/fs.h>
22#include <linux/namei.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/delay.h>
26#include <linux/unistd.h>
27#include <linux/string.h>
28#include <linux/parser.h>
29#include <linux/syscalls.h>
30#include <linux/configfs.h>
31#include <linux/spinlock.h>
32
33#include <target/target_core_base.h>
34#include <target/target_core_backend.h>
35#include <target/target_core_fabric.h>
36
37#include "target_core_internal.h"
38#include "target_core_alua.h"
39#include "target_core_pr.h"
40#include "target_core_rd.h"
41#include "target_core_xcopy.h"
42
43#define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
44static void target_core_setup_##_name##_cit(struct target_backend *tb) \
45{ \
46 struct config_item_type *cit = &tb->tb_##_name##_cit; \
47 \
48 cit->ct_item_ops = _item_ops; \
49 cit->ct_group_ops = _group_ops; \
50 cit->ct_attrs = _attrs; \
51 cit->ct_owner = tb->ops->owner; \
52 pr_debug("Setup generic %s\n", __stringify(_name)); \
53}
54
55#define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
56static void target_core_setup_##_name##_cit(struct target_backend *tb) \
57{ \
58 struct config_item_type *cit = &tb->tb_##_name##_cit; \
59 \
60 cit->ct_item_ops = _item_ops; \
61 cit->ct_group_ops = _group_ops; \
62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
63 cit->ct_owner = tb->ops->owner; \
64 pr_debug("Setup generic %s\n", __stringify(_name)); \
65}
66
67extern struct t10_alua_lu_gp *default_lu_gp;
68
69static LIST_HEAD(g_tf_list);
70static DEFINE_MUTEX(g_tf_lock);
71
72static struct config_group target_core_hbagroup;
73static struct config_group alua_group;
74static struct config_group alua_lu_gps_group;
75
76static unsigned int target_devices;
77static DEFINE_MUTEX(target_devices_lock);
78
79static inline struct se_hba *
80item_to_hba(struct config_item *item)
81{
82 return container_of(to_config_group(item), struct se_hba, hba_group);
83}
84
85/*
86 * Attributes for /sys/kernel/config/target/
87 */
88static ssize_t target_core_item_version_show(struct config_item *item,
89 char *page)
90{
91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
93 utsname()->sysname, utsname()->machine);
94}
95
96CONFIGFS_ATTR_RO(target_core_item_, version);
97
98char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
99static char db_root_stage[DB_ROOT_LEN];
100
101static ssize_t target_core_item_dbroot_show(struct config_item *item,
102 char *page)
103{
104 return sprintf(page, "%s\n", db_root);
105}
106
107static ssize_t target_core_item_dbroot_store(struct config_item *item,
108 const char *page, size_t count)
109{
110 ssize_t read_bytes;
111 struct file *fp;
112 ssize_t r = -EINVAL;
113
114 mutex_lock(&target_devices_lock);
115 if (target_devices) {
116 pr_err("db_root: cannot be changed because it's in use\n");
117 goto unlock;
118 }
119
120 if (count > (DB_ROOT_LEN - 1)) {
121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
122 (int)count, DB_ROOT_LEN - 1);
123 goto unlock;
124 }
125
126 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
127 if (!read_bytes)
128 goto unlock;
129
130 if (db_root_stage[read_bytes - 1] == '\n')
131 db_root_stage[read_bytes - 1] = '\0';
132
133 /* validate new db root before accepting it */
134 fp = filp_open(db_root_stage, O_RDONLY, 0);
135 if (IS_ERR(fp)) {
136 pr_err("db_root: cannot open: %s\n", db_root_stage);
137 goto unlock;
138 }
139 if (!S_ISDIR(file_inode(fp)->i_mode)) {
140 filp_close(fp, NULL);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 goto unlock;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
148
149 r = read_bytes;
150
151unlock:
152 mutex_unlock(&target_devices_lock);
153 return r;
154}
155
156CONFIGFS_ATTR(target_core_item_, dbroot);
157
158static struct target_fabric_configfs *target_core_get_fabric(
159 const char *name)
160{
161 struct target_fabric_configfs *tf;
162
163 if (!name)
164 return NULL;
165
166 mutex_lock(&g_tf_lock);
167 list_for_each_entry(tf, &g_tf_list, tf_list) {
168 const char *cmp_name = tf->tf_ops->fabric_alias;
169 if (!cmp_name)
170 cmp_name = tf->tf_ops->fabric_name;
171 if (!strcmp(cmp_name, name)) {
172 atomic_inc(&tf->tf_access_cnt);
173 mutex_unlock(&g_tf_lock);
174 return tf;
175 }
176 }
177 mutex_unlock(&g_tf_lock);
178
179 return NULL;
180}
181
182/*
183 * Called from struct target_core_group_ops->make_group()
184 */
185static struct config_group *target_core_register_fabric(
186 struct config_group *group,
187 const char *name)
188{
189 struct target_fabric_configfs *tf;
190 int ret;
191
192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
193 " %s\n", group, name);
194
195 tf = target_core_get_fabric(name);
196 if (!tf) {
197 pr_debug("target_core_register_fabric() trying autoload for %s\n",
198 name);
199
200 /*
201 * Below are some hardcoded request_module() calls to automatically
202 * local fabric modules when the following is called:
203 *
204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
205 *
206 * Note that this does not limit which TCM fabric module can be
207 * registered, but simply provids auto loading logic for modules with
208 * mkdir(2) system calls with known TCM fabric modules.
209 */
210
211 if (!strncmp(name, "iscsi", 5)) {
212 /*
213 * Automatically load the LIO Target fabric module when the
214 * following is called:
215 *
216 * mkdir -p $CONFIGFS/target/iscsi
217 */
218 ret = request_module("iscsi_target_mod");
219 if (ret < 0) {
220 pr_debug("request_module() failed for"
221 " iscsi_target_mod.ko: %d\n", ret);
222 return ERR_PTR(-EINVAL);
223 }
224 } else if (!strncmp(name, "loopback", 8)) {
225 /*
226 * Automatically load the tcm_loop fabric module when the
227 * following is called:
228 *
229 * mkdir -p $CONFIGFS/target/loopback
230 */
231 ret = request_module("tcm_loop");
232 if (ret < 0) {
233 pr_debug("request_module() failed for"
234 " tcm_loop.ko: %d\n", ret);
235 return ERR_PTR(-EINVAL);
236 }
237 }
238
239 tf = target_core_get_fabric(name);
240 }
241
242 if (!tf) {
243 pr_debug("target_core_get_fabric() failed for %s\n",
244 name);
245 return ERR_PTR(-EINVAL);
246 }
247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
248 " %s\n", tf->tf_ops->fabric_name);
249 /*
250 * On a successful target_core_get_fabric() look, the returned
251 * struct target_fabric_configfs *tf will contain a usage reference.
252 */
253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
254 &tf->tf_wwn_cit);
255
256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
257
258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
259 &tf->tf_discovery_cit);
260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
261
262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
263 config_item_name(&tf->tf_group.cg_item));
264 return &tf->tf_group;
265}
266
267/*
268 * Called from struct target_core_group_ops->drop_item()
269 */
270static void target_core_deregister_fabric(
271 struct config_group *group,
272 struct config_item *item)
273{
274 struct target_fabric_configfs *tf = container_of(
275 to_config_group(item), struct target_fabric_configfs, tf_group);
276
277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
278 " tf list\n", config_item_name(item));
279
280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
281 " %s\n", tf->tf_ops->fabric_name);
282 atomic_dec(&tf->tf_access_cnt);
283
284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
285 " %s\n", config_item_name(item));
286
287 configfs_remove_default_groups(&tf->tf_group);
288 config_item_put(item);
289}
290
291static struct configfs_group_operations target_core_fabric_group_ops = {
292 .make_group = &target_core_register_fabric,
293 .drop_item = &target_core_deregister_fabric,
294};
295
296/*
297 * All item attributes appearing in /sys/kernel/target/ appear here.
298 */
299static struct configfs_attribute *target_core_fabric_item_attrs[] = {
300 &target_core_item_attr_version,
301 &target_core_item_attr_dbroot,
302 NULL,
303};
304
305/*
306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
307 */
308static const struct config_item_type target_core_fabrics_item = {
309 .ct_group_ops = &target_core_fabric_group_ops,
310 .ct_attrs = target_core_fabric_item_attrs,
311 .ct_owner = THIS_MODULE,
312};
313
314static struct configfs_subsystem target_core_fabrics = {
315 .su_group = {
316 .cg_item = {
317 .ci_namebuf = "target",
318 .ci_type = &target_core_fabrics_item,
319 },
320 },
321};
322
323int target_depend_item(struct config_item *item)
324{
325 return configfs_depend_item(&target_core_fabrics, item);
326}
327EXPORT_SYMBOL(target_depend_item);
328
329void target_undepend_item(struct config_item *item)
330{
331 return configfs_undepend_item(item);
332}
333EXPORT_SYMBOL(target_undepend_item);
334
335/*##############################################################################
336// Start functions called by external Target Fabrics Modules
337//############################################################################*/
338
339static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
340{
341 if (tfo->fabric_alias) {
342 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
343 pr_err("Passed alias: %s exceeds "
344 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
345 return -EINVAL;
346 }
347 }
348 if (!tfo->fabric_name) {
349 pr_err("Missing tfo->fabric_name\n");
350 return -EINVAL;
351 }
352 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
353 pr_err("Passed name: %s exceeds "
354 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
355 return -EINVAL;
356 }
357 if (!tfo->tpg_get_wwn) {
358 pr_err("Missing tfo->tpg_get_wwn()\n");
359 return -EINVAL;
360 }
361 if (!tfo->tpg_get_tag) {
362 pr_err("Missing tfo->tpg_get_tag()\n");
363 return -EINVAL;
364 }
365 if (!tfo->tpg_check_demo_mode) {
366 pr_err("Missing tfo->tpg_check_demo_mode()\n");
367 return -EINVAL;
368 }
369 if (!tfo->tpg_check_demo_mode_cache) {
370 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
371 return -EINVAL;
372 }
373 if (!tfo->tpg_check_demo_mode_write_protect) {
374 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
375 return -EINVAL;
376 }
377 if (!tfo->tpg_check_prod_mode_write_protect) {
378 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
379 return -EINVAL;
380 }
381 if (!tfo->tpg_get_inst_index) {
382 pr_err("Missing tfo->tpg_get_inst_index()\n");
383 return -EINVAL;
384 }
385 if (!tfo->release_cmd) {
386 pr_err("Missing tfo->release_cmd()\n");
387 return -EINVAL;
388 }
389 if (!tfo->sess_get_index) {
390 pr_err("Missing tfo->sess_get_index()\n");
391 return -EINVAL;
392 }
393 if (!tfo->write_pending) {
394 pr_err("Missing tfo->write_pending()\n");
395 return -EINVAL;
396 }
397 if (!tfo->set_default_node_attributes) {
398 pr_err("Missing tfo->set_default_node_attributes()\n");
399 return -EINVAL;
400 }
401 if (!tfo->get_cmd_state) {
402 pr_err("Missing tfo->get_cmd_state()\n");
403 return -EINVAL;
404 }
405 if (!tfo->queue_data_in) {
406 pr_err("Missing tfo->queue_data_in()\n");
407 return -EINVAL;
408 }
409 if (!tfo->queue_status) {
410 pr_err("Missing tfo->queue_status()\n");
411 return -EINVAL;
412 }
413 if (!tfo->queue_tm_rsp) {
414 pr_err("Missing tfo->queue_tm_rsp()\n");
415 return -EINVAL;
416 }
417 if (!tfo->aborted_task) {
418 pr_err("Missing tfo->aborted_task()\n");
419 return -EINVAL;
420 }
421 if (!tfo->check_stop_free) {
422 pr_err("Missing tfo->check_stop_free()\n");
423 return -EINVAL;
424 }
425 /*
426 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
427 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
428 * target_core_fabric_configfs.c WWN+TPG group context code.
429 */
430 if (!tfo->fabric_make_wwn) {
431 pr_err("Missing tfo->fabric_make_wwn()\n");
432 return -EINVAL;
433 }
434 if (!tfo->fabric_drop_wwn) {
435 pr_err("Missing tfo->fabric_drop_wwn()\n");
436 return -EINVAL;
437 }
438 if (!tfo->fabric_make_tpg) {
439 pr_err("Missing tfo->fabric_make_tpg()\n");
440 return -EINVAL;
441 }
442 if (!tfo->fabric_drop_tpg) {
443 pr_err("Missing tfo->fabric_drop_tpg()\n");
444 return -EINVAL;
445 }
446
447 return 0;
448}
449
450int target_register_template(const struct target_core_fabric_ops *fo)
451{
452 struct target_fabric_configfs *tf;
453 int ret;
454
455 ret = target_fabric_tf_ops_check(fo);
456 if (ret)
457 return ret;
458
459 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
460 if (!tf) {
461 pr_err("%s: could not allocate memory!\n", __func__);
462 return -ENOMEM;
463 }
464
465 INIT_LIST_HEAD(&tf->tf_list);
466 atomic_set(&tf->tf_access_cnt, 0);
467 tf->tf_ops = fo;
468 target_fabric_setup_cits(tf);
469
470 mutex_lock(&g_tf_lock);
471 list_add_tail(&tf->tf_list, &g_tf_list);
472 mutex_unlock(&g_tf_lock);
473
474 return 0;
475}
476EXPORT_SYMBOL(target_register_template);
477
478void target_unregister_template(const struct target_core_fabric_ops *fo)
479{
480 struct target_fabric_configfs *t;
481
482 mutex_lock(&g_tf_lock);
483 list_for_each_entry(t, &g_tf_list, tf_list) {
484 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
485 BUG_ON(atomic_read(&t->tf_access_cnt));
486 list_del(&t->tf_list);
487 mutex_unlock(&g_tf_lock);
488 /*
489 * Wait for any outstanding fabric se_deve_entry->rcu_head
490 * callbacks to complete post kfree_rcu(), before allowing
491 * fabric driver unload of TFO->module to proceed.
492 */
493 rcu_barrier();
494 kfree(t->tf_tpg_base_cit.ct_attrs);
495 kfree(t);
496 return;
497 }
498 }
499 mutex_unlock(&g_tf_lock);
500}
501EXPORT_SYMBOL(target_unregister_template);
502
503/*##############################################################################
504// Stop functions called by external Target Fabrics Modules
505//############################################################################*/
506
507static inline struct se_dev_attrib *to_attrib(struct config_item *item)
508{
509 return container_of(to_config_group(item), struct se_dev_attrib,
510 da_group);
511}
512
513/* Start functions for struct config_item_type tb_dev_attrib_cit */
514#define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
515static ssize_t _name##_show(struct config_item *item, char *page) \
516{ \
517 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
518}
519
520DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
521DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
522DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
523DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
524DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
525DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
526DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
527DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
528DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
529DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
530DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
531DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
532DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
533DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
534DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
535DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
536DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
537DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
538DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
539DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
540DEF_CONFIGFS_ATTRIB_SHOW(block_size);
541DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
542DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
543DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
544DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
545DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
546DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
547DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
548DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
549DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
550DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
551DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
552
553#define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
554static ssize_t _name##_store(struct config_item *item, const char *page,\
555 size_t count) \
556{ \
557 struct se_dev_attrib *da = to_attrib(item); \
558 u32 val; \
559 int ret; \
560 \
561 ret = kstrtou32(page, 0, &val); \
562 if (ret < 0) \
563 return ret; \
564 da->_name = val; \
565 return count; \
566}
567
568DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
569DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
570DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
571DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
572DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
573
574#define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
575static ssize_t _name##_store(struct config_item *item, const char *page, \
576 size_t count) \
577{ \
578 struct se_dev_attrib *da = to_attrib(item); \
579 bool flag; \
580 int ret; \
581 \
582 ret = kstrtobool(page, &flag); \
583 if (ret < 0) \
584 return ret; \
585 da->_name = flag; \
586 return count; \
587}
588
589DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
590DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
591DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
592DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
593DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
594DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
595
596#define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
597static ssize_t _name##_store(struct config_item *item, const char *page,\
598 size_t count) \
599{ \
600 printk_once(KERN_WARNING \
601 "ignoring deprecated %s attribute\n", \
602 __stringify(_name)); \
603 return count; \
604}
605
606DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
607DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
608
609static void dev_set_t10_wwn_model_alias(struct se_device *dev)
610{
611 const char *configname;
612
613 configname = config_item_name(&dev->dev_group.cg_item);
614 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
615 pr_warn("dev[%p]: Backstore name '%s' is too long for "
616 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
617 configname);
618 }
619 /*
620 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
621 * here without potentially breaking existing setups, so continue to
622 * truncate one byte shorter than what can be carried in INQUIRY.
623 */
624 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
625}
626
627static ssize_t emulate_model_alias_store(struct config_item *item,
628 const char *page, size_t count)
629{
630 struct se_dev_attrib *da = to_attrib(item);
631 struct se_device *dev = da->da_dev;
632 bool flag;
633 int ret;
634
635 if (dev->export_count) {
636 pr_err("dev[%p]: Unable to change model alias"
637 " while export_count is %d\n",
638 dev, dev->export_count);
639 return -EINVAL;
640 }
641
642 ret = kstrtobool(page, &flag);
643 if (ret < 0)
644 return ret;
645
646 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
647 if (flag) {
648 dev_set_t10_wwn_model_alias(dev);
649 } else {
650 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
651 sizeof(dev->t10_wwn.model));
652 }
653 da->emulate_model_alias = flag;
654 return count;
655}
656
657static ssize_t emulate_write_cache_store(struct config_item *item,
658 const char *page, size_t count)
659{
660 struct se_dev_attrib *da = to_attrib(item);
661 bool flag;
662 int ret;
663
664 ret = kstrtobool(page, &flag);
665 if (ret < 0)
666 return ret;
667
668 if (flag && da->da_dev->transport->get_write_cache) {
669 pr_err("emulate_write_cache not supported for this device\n");
670 return -EINVAL;
671 }
672
673 da->emulate_write_cache = flag;
674 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
675 da->da_dev, flag);
676 return count;
677}
678
679static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
680 const char *page, size_t count)
681{
682 struct se_dev_attrib *da = to_attrib(item);
683 u32 val;
684 int ret;
685
686 ret = kstrtou32(page, 0, &val);
687 if (ret < 0)
688 return ret;
689
690 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
691 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
692 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
693 pr_err("Illegal value %d\n", val);
694 return -EINVAL;
695 }
696
697 if (da->da_dev->export_count) {
698 pr_err("dev[%p]: Unable to change SE Device"
699 " UA_INTRLCK_CTRL while export_count is %d\n",
700 da->da_dev, da->da_dev->export_count);
701 return -EINVAL;
702 }
703 da->emulate_ua_intlck_ctrl = val;
704 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
705 da->da_dev, val);
706 return count;
707}
708
709static ssize_t emulate_tas_store(struct config_item *item,
710 const char *page, size_t count)
711{
712 struct se_dev_attrib *da = to_attrib(item);
713 bool flag;
714 int ret;
715
716 ret = kstrtobool(page, &flag);
717 if (ret < 0)
718 return ret;
719
720 if (da->da_dev->export_count) {
721 pr_err("dev[%p]: Unable to change SE Device TAS while"
722 " export_count is %d\n",
723 da->da_dev, da->da_dev->export_count);
724 return -EINVAL;
725 }
726 da->emulate_tas = flag;
727 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
728 da->da_dev, flag ? "Enabled" : "Disabled");
729
730 return count;
731}
732
733static ssize_t emulate_tpu_store(struct config_item *item,
734 const char *page, size_t count)
735{
736 struct se_dev_attrib *da = to_attrib(item);
737 struct se_device *dev = da->da_dev;
738 bool flag;
739 int ret;
740
741 ret = kstrtobool(page, &flag);
742 if (ret < 0)
743 return ret;
744
745 /*
746 * We expect this value to be non-zero when generic Block Layer
747 * Discard supported is detected iblock_create_virtdevice().
748 */
749 if (flag && !da->max_unmap_block_desc_count) {
750 if (!dev->transport->configure_unmap ||
751 !dev->transport->configure_unmap(dev)) {
752 pr_err("Generic Block Discard not supported\n");
753 return -ENOSYS;
754 }
755 }
756
757 da->emulate_tpu = flag;
758 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
759 da->da_dev, flag);
760 return count;
761}
762
763static ssize_t emulate_tpws_store(struct config_item *item,
764 const char *page, size_t count)
765{
766 struct se_dev_attrib *da = to_attrib(item);
767 struct se_device *dev = da->da_dev;
768 bool flag;
769 int ret;
770
771 ret = kstrtobool(page, &flag);
772 if (ret < 0)
773 return ret;
774
775 /*
776 * We expect this value to be non-zero when generic Block Layer
777 * Discard supported is detected iblock_create_virtdevice().
778 */
779 if (flag && !da->max_unmap_block_desc_count) {
780 if (!dev->transport->configure_unmap ||
781 !dev->transport->configure_unmap(dev)) {
782 pr_err("Generic Block Discard not supported\n");
783 return -ENOSYS;
784 }
785 }
786
787 da->emulate_tpws = flag;
788 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
789 da->da_dev, flag);
790 return count;
791}
792
793static ssize_t pi_prot_type_store(struct config_item *item,
794 const char *page, size_t count)
795{
796 struct se_dev_attrib *da = to_attrib(item);
797 int old_prot = da->pi_prot_type, ret;
798 struct se_device *dev = da->da_dev;
799 u32 flag;
800
801 ret = kstrtou32(page, 0, &flag);
802 if (ret < 0)
803 return ret;
804
805 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
806 pr_err("Illegal value %d for pi_prot_type\n", flag);
807 return -EINVAL;
808 }
809 if (flag == 2) {
810 pr_err("DIF TYPE2 protection currently not supported\n");
811 return -ENOSYS;
812 }
813 if (da->hw_pi_prot_type) {
814 pr_warn("DIF protection enabled on underlying hardware,"
815 " ignoring\n");
816 return count;
817 }
818 if (!dev->transport->init_prot || !dev->transport->free_prot) {
819 /* 0 is only allowed value for non-supporting backends */
820 if (flag == 0)
821 return count;
822
823 pr_err("DIF protection not supported by backend: %s\n",
824 dev->transport->name);
825 return -ENOSYS;
826 }
827 if (!target_dev_configured(dev)) {
828 pr_err("DIF protection requires device to be configured\n");
829 return -ENODEV;
830 }
831 if (dev->export_count) {
832 pr_err("dev[%p]: Unable to change SE Device PROT type while"
833 " export_count is %d\n", dev, dev->export_count);
834 return -EINVAL;
835 }
836
837 da->pi_prot_type = flag;
838
839 if (flag && !old_prot) {
840 ret = dev->transport->init_prot(dev);
841 if (ret) {
842 da->pi_prot_type = old_prot;
843 da->pi_prot_verify = (bool) da->pi_prot_type;
844 return ret;
845 }
846
847 } else if (!flag && old_prot) {
848 dev->transport->free_prot(dev);
849 }
850
851 da->pi_prot_verify = (bool) da->pi_prot_type;
852 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
853 return count;
854}
855
856/* always zero, but attr needs to remain RW to avoid userspace breakage */
857static ssize_t pi_prot_format_show(struct config_item *item, char *page)
858{
859 return snprintf(page, PAGE_SIZE, "0\n");
860}
861
862static ssize_t pi_prot_format_store(struct config_item *item,
863 const char *page, size_t count)
864{
865 struct se_dev_attrib *da = to_attrib(item);
866 struct se_device *dev = da->da_dev;
867 bool flag;
868 int ret;
869
870 ret = kstrtobool(page, &flag);
871 if (ret < 0)
872 return ret;
873
874 if (!flag)
875 return count;
876
877 if (!dev->transport->format_prot) {
878 pr_err("DIF protection format not supported by backend %s\n",
879 dev->transport->name);
880 return -ENOSYS;
881 }
882 if (!target_dev_configured(dev)) {
883 pr_err("DIF protection format requires device to be configured\n");
884 return -ENODEV;
885 }
886 if (dev->export_count) {
887 pr_err("dev[%p]: Unable to format SE Device PROT type while"
888 " export_count is %d\n", dev, dev->export_count);
889 return -EINVAL;
890 }
891
892 ret = dev->transport->format_prot(dev);
893 if (ret)
894 return ret;
895
896 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
897 return count;
898}
899
900static ssize_t pi_prot_verify_store(struct config_item *item,
901 const char *page, size_t count)
902{
903 struct se_dev_attrib *da = to_attrib(item);
904 bool flag;
905 int ret;
906
907 ret = kstrtobool(page, &flag);
908 if (ret < 0)
909 return ret;
910
911 if (!flag) {
912 da->pi_prot_verify = flag;
913 return count;
914 }
915 if (da->hw_pi_prot_type) {
916 pr_warn("DIF protection enabled on underlying hardware,"
917 " ignoring\n");
918 return count;
919 }
920 if (!da->pi_prot_type) {
921 pr_warn("DIF protection not supported by backend, ignoring\n");
922 return count;
923 }
924 da->pi_prot_verify = flag;
925
926 return count;
927}
928
929static ssize_t force_pr_aptpl_store(struct config_item *item,
930 const char *page, size_t count)
931{
932 struct se_dev_attrib *da = to_attrib(item);
933 bool flag;
934 int ret;
935
936 ret = kstrtobool(page, &flag);
937 if (ret < 0)
938 return ret;
939 if (da->da_dev->export_count) {
940 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
941 " export_count is %d\n",
942 da->da_dev, da->da_dev->export_count);
943 return -EINVAL;
944 }
945
946 da->force_pr_aptpl = flag;
947 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
948 return count;
949}
950
951static ssize_t emulate_rest_reord_store(struct config_item *item,
952 const char *page, size_t count)
953{
954 struct se_dev_attrib *da = to_attrib(item);
955 bool flag;
956 int ret;
957
958 ret = kstrtobool(page, &flag);
959 if (ret < 0)
960 return ret;
961
962 if (flag != 0) {
963 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
964 " reordering not implemented\n", da->da_dev);
965 return -ENOSYS;
966 }
967 da->emulate_rest_reord = flag;
968 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
969 da->da_dev, flag);
970 return count;
971}
972
973static ssize_t unmap_zeroes_data_store(struct config_item *item,
974 const char *page, size_t count)
975{
976 struct se_dev_attrib *da = to_attrib(item);
977 struct se_device *dev = da->da_dev;
978 bool flag;
979 int ret;
980
981 ret = kstrtobool(page, &flag);
982 if (ret < 0)
983 return ret;
984
985 if (da->da_dev->export_count) {
986 pr_err("dev[%p]: Unable to change SE Device"
987 " unmap_zeroes_data while export_count is %d\n",
988 da->da_dev, da->da_dev->export_count);
989 return -EINVAL;
990 }
991 /*
992 * We expect this value to be non-zero when generic Block Layer
993 * Discard supported is detected iblock_configure_device().
994 */
995 if (flag && !da->max_unmap_block_desc_count) {
996 if (!dev->transport->configure_unmap ||
997 !dev->transport->configure_unmap(dev)) {
998 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n",
999 da->da_dev);
1000 return -ENOSYS;
1001 }
1002 }
1003 da->unmap_zeroes_data = flag;
1004 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
1005 da->da_dev, flag);
1006 return count;
1007}
1008
1009/*
1010 * Note, this can only be called on unexported SE Device Object.
1011 */
1012static ssize_t queue_depth_store(struct config_item *item,
1013 const char *page, size_t count)
1014{
1015 struct se_dev_attrib *da = to_attrib(item);
1016 struct se_device *dev = da->da_dev;
1017 u32 val;
1018 int ret;
1019
1020 ret = kstrtou32(page, 0, &val);
1021 if (ret < 0)
1022 return ret;
1023
1024 if (dev->export_count) {
1025 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1026 " export_count is %d\n",
1027 dev, dev->export_count);
1028 return -EINVAL;
1029 }
1030 if (!val) {
1031 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1032 return -EINVAL;
1033 }
1034
1035 if (val > dev->dev_attrib.queue_depth) {
1036 if (val > dev->dev_attrib.hw_queue_depth) {
1037 pr_err("dev[%p]: Passed queue_depth:"
1038 " %u exceeds TCM/SE_Device MAX"
1039 " TCQ: %u\n", dev, val,
1040 dev->dev_attrib.hw_queue_depth);
1041 return -EINVAL;
1042 }
1043 }
1044 da->queue_depth = dev->queue_depth = val;
1045 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1046 return count;
1047}
1048
1049static ssize_t optimal_sectors_store(struct config_item *item,
1050 const char *page, size_t count)
1051{
1052 struct se_dev_attrib *da = to_attrib(item);
1053 u32 val;
1054 int ret;
1055
1056 ret = kstrtou32(page, 0, &val);
1057 if (ret < 0)
1058 return ret;
1059
1060 if (da->da_dev->export_count) {
1061 pr_err("dev[%p]: Unable to change SE Device"
1062 " optimal_sectors while export_count is %d\n",
1063 da->da_dev, da->da_dev->export_count);
1064 return -EINVAL;
1065 }
1066 if (val > da->hw_max_sectors) {
1067 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1068 " greater than hw_max_sectors: %u\n",
1069 da->da_dev, val, da->hw_max_sectors);
1070 return -EINVAL;
1071 }
1072
1073 da->optimal_sectors = val;
1074 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1075 da->da_dev, val);
1076 return count;
1077}
1078
1079static ssize_t block_size_store(struct config_item *item,
1080 const char *page, size_t count)
1081{
1082 struct se_dev_attrib *da = to_attrib(item);
1083 u32 val;
1084 int ret;
1085
1086 ret = kstrtou32(page, 0, &val);
1087 if (ret < 0)
1088 return ret;
1089
1090 if (da->da_dev->export_count) {
1091 pr_err("dev[%p]: Unable to change SE Device block_size"
1092 " while export_count is %d\n",
1093 da->da_dev, da->da_dev->export_count);
1094 return -EINVAL;
1095 }
1096
1097 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1098 pr_err("dev[%p]: Illegal value for block_device: %u"
1099 " for SE device, must be 512, 1024, 2048 or 4096\n",
1100 da->da_dev, val);
1101 return -EINVAL;
1102 }
1103
1104 da->block_size = val;
1105
1106 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1107 da->da_dev, val);
1108 return count;
1109}
1110
1111static ssize_t alua_support_show(struct config_item *item, char *page)
1112{
1113 struct se_dev_attrib *da = to_attrib(item);
1114 u8 flags = da->da_dev->transport_flags;
1115
1116 return snprintf(page, PAGE_SIZE, "%d\n",
1117 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1118}
1119
1120static ssize_t alua_support_store(struct config_item *item,
1121 const char *page, size_t count)
1122{
1123 struct se_dev_attrib *da = to_attrib(item);
1124 struct se_device *dev = da->da_dev;
1125 bool flag, oldflag;
1126 int ret;
1127
1128 ret = kstrtobool(page, &flag);
1129 if (ret < 0)
1130 return ret;
1131
1132 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1133 if (flag == oldflag)
1134 return count;
1135
1136 if (!(dev->transport->transport_flags_changeable &
1137 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1138 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1139 " alua_support has fixed value\n", dev);
1140 return -ENOSYS;
1141 }
1142
1143 if (flag)
1144 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1145 else
1146 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1147 return count;
1148}
1149
1150static ssize_t pgr_support_show(struct config_item *item, char *page)
1151{
1152 struct se_dev_attrib *da = to_attrib(item);
1153 u8 flags = da->da_dev->transport_flags;
1154
1155 return snprintf(page, PAGE_SIZE, "%d\n",
1156 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1157}
1158
1159static ssize_t pgr_support_store(struct config_item *item,
1160 const char *page, size_t count)
1161{
1162 struct se_dev_attrib *da = to_attrib(item);
1163 struct se_device *dev = da->da_dev;
1164 bool flag, oldflag;
1165 int ret;
1166
1167 ret = kstrtobool(page, &flag);
1168 if (ret < 0)
1169 return ret;
1170
1171 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1172 if (flag == oldflag)
1173 return count;
1174
1175 if (!(dev->transport->transport_flags_changeable &
1176 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1177 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1178 " pgr_support has fixed value\n", dev);
1179 return -ENOSYS;
1180 }
1181
1182 if (flag)
1183 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1184 else
1185 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1186 return count;
1187}
1188
1189static ssize_t emulate_rsoc_store(struct config_item *item,
1190 const char *page, size_t count)
1191{
1192 struct se_dev_attrib *da = to_attrib(item);
1193 bool flag;
1194 int ret;
1195
1196 ret = kstrtobool(page, &flag);
1197 if (ret < 0)
1198 return ret;
1199
1200 da->emulate_rsoc = flag;
1201 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n",
1202 da->da_dev, flag);
1203 return count;
1204}
1205
1206CONFIGFS_ATTR(, emulate_model_alias);
1207CONFIGFS_ATTR(, emulate_dpo);
1208CONFIGFS_ATTR(, emulate_fua_write);
1209CONFIGFS_ATTR(, emulate_fua_read);
1210CONFIGFS_ATTR(, emulate_write_cache);
1211CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1212CONFIGFS_ATTR(, emulate_tas);
1213CONFIGFS_ATTR(, emulate_tpu);
1214CONFIGFS_ATTR(, emulate_tpws);
1215CONFIGFS_ATTR(, emulate_caw);
1216CONFIGFS_ATTR(, emulate_3pc);
1217CONFIGFS_ATTR(, emulate_pr);
1218CONFIGFS_ATTR(, emulate_rsoc);
1219CONFIGFS_ATTR(, pi_prot_type);
1220CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1221CONFIGFS_ATTR(, pi_prot_format);
1222CONFIGFS_ATTR(, pi_prot_verify);
1223CONFIGFS_ATTR(, enforce_pr_isids);
1224CONFIGFS_ATTR(, is_nonrot);
1225CONFIGFS_ATTR(, emulate_rest_reord);
1226CONFIGFS_ATTR(, force_pr_aptpl);
1227CONFIGFS_ATTR_RO(, hw_block_size);
1228CONFIGFS_ATTR(, block_size);
1229CONFIGFS_ATTR_RO(, hw_max_sectors);
1230CONFIGFS_ATTR(, optimal_sectors);
1231CONFIGFS_ATTR_RO(, hw_queue_depth);
1232CONFIGFS_ATTR(, queue_depth);
1233CONFIGFS_ATTR(, max_unmap_lba_count);
1234CONFIGFS_ATTR(, max_unmap_block_desc_count);
1235CONFIGFS_ATTR(, unmap_granularity);
1236CONFIGFS_ATTR(, unmap_granularity_alignment);
1237CONFIGFS_ATTR(, unmap_zeroes_data);
1238CONFIGFS_ATTR(, max_write_same_len);
1239CONFIGFS_ATTR(, alua_support);
1240CONFIGFS_ATTR(, pgr_support);
1241
1242/*
1243 * dev_attrib attributes for devices using the target core SBC/SPC
1244 * interpreter. Any backend using spc_parse_cdb should be using
1245 * these.
1246 */
1247struct configfs_attribute *sbc_attrib_attrs[] = {
1248 &attr_emulate_model_alias,
1249 &attr_emulate_dpo,
1250 &attr_emulate_fua_write,
1251 &attr_emulate_fua_read,
1252 &attr_emulate_write_cache,
1253 &attr_emulate_ua_intlck_ctrl,
1254 &attr_emulate_tas,
1255 &attr_emulate_tpu,
1256 &attr_emulate_tpws,
1257 &attr_emulate_caw,
1258 &attr_emulate_3pc,
1259 &attr_emulate_pr,
1260 &attr_pi_prot_type,
1261 &attr_hw_pi_prot_type,
1262 &attr_pi_prot_format,
1263 &attr_pi_prot_verify,
1264 &attr_enforce_pr_isids,
1265 &attr_is_nonrot,
1266 &attr_emulate_rest_reord,
1267 &attr_force_pr_aptpl,
1268 &attr_hw_block_size,
1269 &attr_block_size,
1270 &attr_hw_max_sectors,
1271 &attr_optimal_sectors,
1272 &attr_hw_queue_depth,
1273 &attr_queue_depth,
1274 &attr_max_unmap_lba_count,
1275 &attr_max_unmap_block_desc_count,
1276 &attr_unmap_granularity,
1277 &attr_unmap_granularity_alignment,
1278 &attr_unmap_zeroes_data,
1279 &attr_max_write_same_len,
1280 &attr_alua_support,
1281 &attr_pgr_support,
1282 &attr_emulate_rsoc,
1283 NULL,
1284};
1285EXPORT_SYMBOL(sbc_attrib_attrs);
1286
1287/*
1288 * Minimal dev_attrib attributes for devices passing through CDBs.
1289 * In this case we only provide a few read-only attributes for
1290 * backwards compatibility.
1291 */
1292struct configfs_attribute *passthrough_attrib_attrs[] = {
1293 &attr_hw_pi_prot_type,
1294 &attr_hw_block_size,
1295 &attr_hw_max_sectors,
1296 &attr_hw_queue_depth,
1297 &attr_emulate_pr,
1298 &attr_alua_support,
1299 &attr_pgr_support,
1300 NULL,
1301};
1302EXPORT_SYMBOL(passthrough_attrib_attrs);
1303
1304/*
1305 * pr related dev_attrib attributes for devices passing through CDBs,
1306 * but allowing in core pr emulation.
1307 */
1308struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1309 &attr_enforce_pr_isids,
1310 &attr_force_pr_aptpl,
1311 NULL,
1312};
1313EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1314
1315TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1316TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1317
1318/* End functions for struct config_item_type tb_dev_attrib_cit */
1319
1320/* Start functions for struct config_item_type tb_dev_wwn_cit */
1321
1322static struct t10_wwn *to_t10_wwn(struct config_item *item)
1323{
1324 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1325}
1326
1327static ssize_t target_check_inquiry_data(char *buf)
1328{
1329 size_t len;
1330 int i;
1331
1332 len = strlen(buf);
1333
1334 /*
1335 * SPC 4.3.1:
1336 * ASCII data fields shall contain only ASCII printable characters
1337 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1338 * more ASCII null (00h) characters.
1339 */
1340 for (i = 0; i < len; i++) {
1341 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1342 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1343 return -EINVAL;
1344 }
1345 }
1346
1347 return len;
1348}
1349
1350/*
1351 * STANDARD and VPD page 0x83 T10 Vendor Identification
1352 */
1353static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1354 char *page)
1355{
1356 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1357}
1358
1359static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1360 const char *page, size_t count)
1361{
1362 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1363 struct se_device *dev = t10_wwn->t10_dev;
1364 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1365 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1366 char *stripped = NULL;
1367 size_t len;
1368 ssize_t ret;
1369
1370 len = strlcpy(buf, page, sizeof(buf));
1371 if (len < sizeof(buf)) {
1372 /* Strip any newline added from userspace. */
1373 stripped = strstrip(buf);
1374 len = strlen(stripped);
1375 }
1376 if (len > INQUIRY_VENDOR_LEN) {
1377 pr_err("Emulated T10 Vendor Identification exceeds"
1378 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1379 "\n");
1380 return -EOVERFLOW;
1381 }
1382
1383 ret = target_check_inquiry_data(stripped);
1384
1385 if (ret < 0)
1386 return ret;
1387
1388 /*
1389 * Check to see if any active exports exist. If they do exist, fail
1390 * here as changing this information on the fly (underneath the
1391 * initiator side OS dependent multipath code) could cause negative
1392 * effects.
1393 */
1394 if (dev->export_count) {
1395 pr_err("Unable to set T10 Vendor Identification while"
1396 " active %d exports exist\n", dev->export_count);
1397 return -EINVAL;
1398 }
1399
1400 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1401 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1402
1403 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1404 " %s\n", dev->t10_wwn.vendor);
1405
1406 return count;
1407}
1408
1409static ssize_t target_wwn_product_id_show(struct config_item *item,
1410 char *page)
1411{
1412 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1413}
1414
1415static ssize_t target_wwn_product_id_store(struct config_item *item,
1416 const char *page, size_t count)
1417{
1418 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1419 struct se_device *dev = t10_wwn->t10_dev;
1420 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1421 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1422 char *stripped = NULL;
1423 size_t len;
1424 ssize_t ret;
1425
1426 len = strlcpy(buf, page, sizeof(buf));
1427 if (len < sizeof(buf)) {
1428 /* Strip any newline added from userspace. */
1429 stripped = strstrip(buf);
1430 len = strlen(stripped);
1431 }
1432 if (len > INQUIRY_MODEL_LEN) {
1433 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1434 __stringify(INQUIRY_MODEL_LEN)
1435 "\n");
1436 return -EOVERFLOW;
1437 }
1438
1439 ret = target_check_inquiry_data(stripped);
1440
1441 if (ret < 0)
1442 return ret;
1443
1444 /*
1445 * Check to see if any active exports exist. If they do exist, fail
1446 * here as changing this information on the fly (underneath the
1447 * initiator side OS dependent multipath code) could cause negative
1448 * effects.
1449 */
1450 if (dev->export_count) {
1451 pr_err("Unable to set T10 Model while active %d exports exist\n",
1452 dev->export_count);
1453 return -EINVAL;
1454 }
1455
1456 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1457 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1458
1459 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1460 dev->t10_wwn.model);
1461
1462 return count;
1463}
1464
1465static ssize_t target_wwn_revision_show(struct config_item *item,
1466 char *page)
1467{
1468 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1469}
1470
1471static ssize_t target_wwn_revision_store(struct config_item *item,
1472 const char *page, size_t count)
1473{
1474 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1475 struct se_device *dev = t10_wwn->t10_dev;
1476 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1477 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1478 char *stripped = NULL;
1479 size_t len;
1480 ssize_t ret;
1481
1482 len = strlcpy(buf, page, sizeof(buf));
1483 if (len < sizeof(buf)) {
1484 /* Strip any newline added from userspace. */
1485 stripped = strstrip(buf);
1486 len = strlen(stripped);
1487 }
1488 if (len > INQUIRY_REVISION_LEN) {
1489 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1490 __stringify(INQUIRY_REVISION_LEN)
1491 "\n");
1492 return -EOVERFLOW;
1493 }
1494
1495 ret = target_check_inquiry_data(stripped);
1496
1497 if (ret < 0)
1498 return ret;
1499
1500 /*
1501 * Check to see if any active exports exist. If they do exist, fail
1502 * here as changing this information on the fly (underneath the
1503 * initiator side OS dependent multipath code) could cause negative
1504 * effects.
1505 */
1506 if (dev->export_count) {
1507 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1508 dev->export_count);
1509 return -EINVAL;
1510 }
1511
1512 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1513 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1514
1515 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1516 dev->t10_wwn.revision);
1517
1518 return count;
1519}
1520
1521static ssize_t
1522target_wwn_company_id_show(struct config_item *item,
1523 char *page)
1524{
1525 return snprintf(page, PAGE_SIZE, "%#08x\n",
1526 to_t10_wwn(item)->company_id);
1527}
1528
1529static ssize_t
1530target_wwn_company_id_store(struct config_item *item,
1531 const char *page, size_t count)
1532{
1533 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1534 struct se_device *dev = t10_wwn->t10_dev;
1535 u32 val;
1536 int ret;
1537
1538 /*
1539 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1540 * form OUI assigned by the IEEE.
1541 */
1542 ret = kstrtou32(page, 0, &val);
1543 if (ret < 0)
1544 return ret;
1545
1546 if (val >= 0x1000000)
1547 return -EOVERFLOW;
1548
1549 /*
1550 * Check to see if any active exports exist. If they do exist, fail
1551 * here as changing this information on the fly (underneath the
1552 * initiator side OS dependent multipath code) could cause negative
1553 * effects.
1554 */
1555 if (dev->export_count) {
1556 pr_err("Unable to set Company ID while %u exports exist\n",
1557 dev->export_count);
1558 return -EINVAL;
1559 }
1560
1561 t10_wwn->company_id = val;
1562
1563 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1564 t10_wwn->company_id);
1565
1566 return count;
1567}
1568
1569/*
1570 * VPD page 0x80 Unit serial
1571 */
1572static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1573 char *page)
1574{
1575 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1576 &to_t10_wwn(item)->unit_serial[0]);
1577}
1578
1579static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1580 const char *page, size_t count)
1581{
1582 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1583 struct se_device *dev = t10_wwn->t10_dev;
1584 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1585
1586 /*
1587 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1588 * from the struct scsi_device level firmware, do not allow
1589 * VPD Unit Serial to be emulated.
1590 *
1591 * Note this struct scsi_device could also be emulating VPD
1592 * information from its drivers/scsi LLD. But for now we assume
1593 * it is doing 'the right thing' wrt a world wide unique
1594 * VPD Unit Serial Number that OS dependent multipath can depend on.
1595 */
1596 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1597 pr_err("Underlying SCSI device firmware provided VPD"
1598 " Unit Serial, ignoring request\n");
1599 return -EOPNOTSUPP;
1600 }
1601
1602 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1603 pr_err("Emulated VPD Unit Serial exceeds"
1604 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1605 return -EOVERFLOW;
1606 }
1607 /*
1608 * Check to see if any active $FABRIC_MOD exports exist. If they
1609 * do exist, fail here as changing this information on the fly
1610 * (underneath the initiator side OS dependent multipath code)
1611 * could cause negative effects.
1612 */
1613 if (dev->export_count) {
1614 pr_err("Unable to set VPD Unit Serial while"
1615 " active %d $FABRIC_MOD exports exist\n",
1616 dev->export_count);
1617 return -EINVAL;
1618 }
1619
1620 /*
1621 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1622 *
1623 * Also, strip any newline added from the userspace
1624 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1625 */
1626 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1627 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1628 "%s", strstrip(buf));
1629 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1630
1631 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1632 " %s\n", dev->t10_wwn.unit_serial);
1633
1634 return count;
1635}
1636
1637/*
1638 * VPD page 0x83 Protocol Identifier
1639 */
1640static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1641 char *page)
1642{
1643 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1644 struct t10_vpd *vpd;
1645 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1646 ssize_t len = 0;
1647
1648 spin_lock(&t10_wwn->t10_vpd_lock);
1649 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1650 if (!vpd->protocol_identifier_set)
1651 continue;
1652
1653 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1654
1655 if (len + strlen(buf) >= PAGE_SIZE)
1656 break;
1657
1658 len += sprintf(page+len, "%s", buf);
1659 }
1660 spin_unlock(&t10_wwn->t10_vpd_lock);
1661
1662 return len;
1663}
1664
1665/*
1666 * Generic wrapper for dumping VPD identifiers by association.
1667 */
1668#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1669static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1670 char *page) \
1671{ \
1672 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1673 struct t10_vpd *vpd; \
1674 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1675 ssize_t len = 0; \
1676 \
1677 spin_lock(&t10_wwn->t10_vpd_lock); \
1678 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1679 if (vpd->association != _assoc) \
1680 continue; \
1681 \
1682 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1683 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1684 if (len + strlen(buf) >= PAGE_SIZE) \
1685 break; \
1686 len += sprintf(page+len, "%s", buf); \
1687 \
1688 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1689 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1690 if (len + strlen(buf) >= PAGE_SIZE) \
1691 break; \
1692 len += sprintf(page+len, "%s", buf); \
1693 \
1694 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1695 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1696 if (len + strlen(buf) >= PAGE_SIZE) \
1697 break; \
1698 len += sprintf(page+len, "%s", buf); \
1699 } \
1700 spin_unlock(&t10_wwn->t10_vpd_lock); \
1701 \
1702 return len; \
1703}
1704
1705/* VPD page 0x83 Association: Logical Unit */
1706DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1707/* VPD page 0x83 Association: Target Port */
1708DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1709/* VPD page 0x83 Association: SCSI Target Device */
1710DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1711
1712CONFIGFS_ATTR(target_wwn_, vendor_id);
1713CONFIGFS_ATTR(target_wwn_, product_id);
1714CONFIGFS_ATTR(target_wwn_, revision);
1715CONFIGFS_ATTR(target_wwn_, company_id);
1716CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1717CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1718CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1719CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1720CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1721
1722static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1723 &target_wwn_attr_vendor_id,
1724 &target_wwn_attr_product_id,
1725 &target_wwn_attr_revision,
1726 &target_wwn_attr_company_id,
1727 &target_wwn_attr_vpd_unit_serial,
1728 &target_wwn_attr_vpd_protocol_identifier,
1729 &target_wwn_attr_vpd_assoc_logical_unit,
1730 &target_wwn_attr_vpd_assoc_target_port,
1731 &target_wwn_attr_vpd_assoc_scsi_target_device,
1732 NULL,
1733};
1734
1735TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1736
1737/* End functions for struct config_item_type tb_dev_wwn_cit */
1738
1739/* Start functions for struct config_item_type tb_dev_pr_cit */
1740
1741static struct se_device *pr_to_dev(struct config_item *item)
1742{
1743 return container_of(to_config_group(item), struct se_device,
1744 dev_pr_group);
1745}
1746
1747static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1748 char *page)
1749{
1750 struct se_node_acl *se_nacl;
1751 struct t10_pr_registration *pr_reg;
1752 char i_buf[PR_REG_ISID_ID_LEN] = { };
1753
1754 pr_reg = dev->dev_pr_res_holder;
1755 if (!pr_reg)
1756 return sprintf(page, "No SPC-3 Reservation holder\n");
1757
1758 se_nacl = pr_reg->pr_reg_nacl;
1759 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1760
1761 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1762 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1763 se_nacl->initiatorname, i_buf);
1764}
1765
1766static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1767 char *page)
1768{
1769 struct se_session *sess = dev->reservation_holder;
1770 struct se_node_acl *se_nacl;
1771 ssize_t len;
1772
1773 if (sess) {
1774 se_nacl = sess->se_node_acl;
1775 len = sprintf(page,
1776 "SPC-2 Reservation: %s Initiator: %s\n",
1777 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1778 se_nacl->initiatorname);
1779 } else {
1780 len = sprintf(page, "No SPC-2 Reservation holder\n");
1781 }
1782 return len;
1783}
1784
1785static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1786{
1787 struct se_device *dev = pr_to_dev(item);
1788 int ret;
1789
1790 if (!dev->dev_attrib.emulate_pr)
1791 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1792
1793 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1794 return sprintf(page, "Passthrough\n");
1795
1796 spin_lock(&dev->dev_reservation_lock);
1797 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1798 ret = target_core_dev_pr_show_spc2_res(dev, page);
1799 else
1800 ret = target_core_dev_pr_show_spc3_res(dev, page);
1801 spin_unlock(&dev->dev_reservation_lock);
1802 return ret;
1803}
1804
1805static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1806 char *page)
1807{
1808 struct se_device *dev = pr_to_dev(item);
1809 ssize_t len = 0;
1810
1811 spin_lock(&dev->dev_reservation_lock);
1812 if (!dev->dev_pr_res_holder) {
1813 len = sprintf(page, "No SPC-3 Reservation holder\n");
1814 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1815 len = sprintf(page, "SPC-3 Reservation: All Target"
1816 " Ports registration\n");
1817 } else {
1818 len = sprintf(page, "SPC-3 Reservation: Single"
1819 " Target Port registration\n");
1820 }
1821
1822 spin_unlock(&dev->dev_reservation_lock);
1823 return len;
1824}
1825
1826static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1827 char *page)
1828{
1829 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1830}
1831
1832
1833static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1834 char *page)
1835{
1836 struct se_device *dev = pr_to_dev(item);
1837 struct se_node_acl *se_nacl;
1838 struct se_portal_group *se_tpg;
1839 struct t10_pr_registration *pr_reg;
1840 const struct target_core_fabric_ops *tfo;
1841 ssize_t len = 0;
1842
1843 spin_lock(&dev->dev_reservation_lock);
1844 pr_reg = dev->dev_pr_res_holder;
1845 if (!pr_reg) {
1846 len = sprintf(page, "No SPC-3 Reservation holder\n");
1847 goto out_unlock;
1848 }
1849
1850 se_nacl = pr_reg->pr_reg_nacl;
1851 se_tpg = se_nacl->se_tpg;
1852 tfo = se_tpg->se_tpg_tfo;
1853
1854 len += sprintf(page+len, "SPC-3 Reservation: %s"
1855 " Target Node Endpoint: %s\n", tfo->fabric_name,
1856 tfo->tpg_get_wwn(se_tpg));
1857 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1858 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1859 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1860 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1861 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1862
1863out_unlock:
1864 spin_unlock(&dev->dev_reservation_lock);
1865 return len;
1866}
1867
1868
1869static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1870 char *page)
1871{
1872 struct se_device *dev = pr_to_dev(item);
1873 const struct target_core_fabric_ops *tfo;
1874 struct t10_pr_registration *pr_reg;
1875 unsigned char buf[384];
1876 char i_buf[PR_REG_ISID_ID_LEN];
1877 ssize_t len = 0;
1878 int reg_count = 0;
1879
1880 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1881
1882 spin_lock(&dev->t10_pr.registration_lock);
1883 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1884 pr_reg_list) {
1885
1886 memset(buf, 0, 384);
1887 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1888 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1889 core_pr_dump_initiator_port(pr_reg, i_buf,
1890 PR_REG_ISID_ID_LEN);
1891 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1892 tfo->fabric_name,
1893 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1894 pr_reg->pr_res_generation);
1895
1896 if (len + strlen(buf) >= PAGE_SIZE)
1897 break;
1898
1899 len += sprintf(page+len, "%s", buf);
1900 reg_count++;
1901 }
1902 spin_unlock(&dev->t10_pr.registration_lock);
1903
1904 if (!reg_count)
1905 len += sprintf(page+len, "None\n");
1906
1907 return len;
1908}
1909
1910static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1911{
1912 struct se_device *dev = pr_to_dev(item);
1913 struct t10_pr_registration *pr_reg;
1914 ssize_t len = 0;
1915
1916 spin_lock(&dev->dev_reservation_lock);
1917 pr_reg = dev->dev_pr_res_holder;
1918 if (pr_reg) {
1919 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1920 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1921 } else {
1922 len = sprintf(page, "No SPC-3 Reservation holder\n");
1923 }
1924
1925 spin_unlock(&dev->dev_reservation_lock);
1926 return len;
1927}
1928
1929static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1930{
1931 struct se_device *dev = pr_to_dev(item);
1932
1933 if (!dev->dev_attrib.emulate_pr)
1934 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1935 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1936 return sprintf(page, "SPC_PASSTHROUGH\n");
1937 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1938 return sprintf(page, "SPC2_RESERVATIONS\n");
1939
1940 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1941}
1942
1943static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1944 char *page)
1945{
1946 struct se_device *dev = pr_to_dev(item);
1947
1948 if (!dev->dev_attrib.emulate_pr ||
1949 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1950 return 0;
1951
1952 return sprintf(page, "APTPL Bit Status: %s\n",
1953 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1954}
1955
1956static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1957 char *page)
1958{
1959 struct se_device *dev = pr_to_dev(item);
1960
1961 if (!dev->dev_attrib.emulate_pr ||
1962 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1963 return 0;
1964
1965 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1966}
1967
1968enum {
1969 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1970 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1971 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1972 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1973};
1974
1975static match_table_t tokens = {
1976 {Opt_initiator_fabric, "initiator_fabric=%s"},
1977 {Opt_initiator_node, "initiator_node=%s"},
1978 {Opt_initiator_sid, "initiator_sid=%s"},
1979 {Opt_sa_res_key, "sa_res_key=%s"},
1980 {Opt_res_holder, "res_holder=%d"},
1981 {Opt_res_type, "res_type=%d"},
1982 {Opt_res_scope, "res_scope=%d"},
1983 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1984 {Opt_mapped_lun, "mapped_lun=%u"},
1985 {Opt_target_fabric, "target_fabric=%s"},
1986 {Opt_target_node, "target_node=%s"},
1987 {Opt_tpgt, "tpgt=%d"},
1988 {Opt_port_rtpi, "port_rtpi=%d"},
1989 {Opt_target_lun, "target_lun=%u"},
1990 {Opt_err, NULL}
1991};
1992
1993static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1994 const char *page, size_t count)
1995{
1996 struct se_device *dev = pr_to_dev(item);
1997 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1998 unsigned char *t_fabric = NULL, *t_port = NULL;
1999 char *orig, *ptr, *opts;
2000 substring_t args[MAX_OPT_ARGS];
2001 unsigned long long tmp_ll;
2002 u64 sa_res_key = 0;
2003 u64 mapped_lun = 0, target_lun = 0;
2004 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
2005 u16 tpgt = 0;
2006 u8 type = 0;
2007
2008 if (!dev->dev_attrib.emulate_pr ||
2009 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
2010 return count;
2011 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
2012 return count;
2013
2014 if (dev->export_count) {
2015 pr_debug("Unable to process APTPL metadata while"
2016 " active fabric exports exist\n");
2017 return -EINVAL;
2018 }
2019
2020 opts = kstrdup(page, GFP_KERNEL);
2021 if (!opts)
2022 return -ENOMEM;
2023
2024 orig = opts;
2025 while ((ptr = strsep(&opts, ",\n")) != NULL) {
2026 if (!*ptr)
2027 continue;
2028
2029 token = match_token(ptr, tokens, args);
2030 switch (token) {
2031 case Opt_initiator_fabric:
2032 i_fabric = match_strdup(args);
2033 if (!i_fabric) {
2034 ret = -ENOMEM;
2035 goto out;
2036 }
2037 break;
2038 case Opt_initiator_node:
2039 i_port = match_strdup(args);
2040 if (!i_port) {
2041 ret = -ENOMEM;
2042 goto out;
2043 }
2044 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2045 pr_err("APTPL metadata initiator_node="
2046 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2047 PR_APTPL_MAX_IPORT_LEN);
2048 ret = -EINVAL;
2049 break;
2050 }
2051 break;
2052 case Opt_initiator_sid:
2053 isid = match_strdup(args);
2054 if (!isid) {
2055 ret = -ENOMEM;
2056 goto out;
2057 }
2058 if (strlen(isid) >= PR_REG_ISID_LEN) {
2059 pr_err("APTPL metadata initiator_isid"
2060 "= exceeds PR_REG_ISID_LEN: %d\n",
2061 PR_REG_ISID_LEN);
2062 ret = -EINVAL;
2063 break;
2064 }
2065 break;
2066 case Opt_sa_res_key:
2067 ret = match_u64(args, &tmp_ll);
2068 if (ret < 0) {
2069 pr_err("kstrtoull() failed for sa_res_key=\n");
2070 goto out;
2071 }
2072 sa_res_key = (u64)tmp_ll;
2073 break;
2074 /*
2075 * PR APTPL Metadata for Reservation
2076 */
2077 case Opt_res_holder:
2078 ret = match_int(args, &arg);
2079 if (ret)
2080 goto out;
2081 res_holder = arg;
2082 break;
2083 case Opt_res_type:
2084 ret = match_int(args, &arg);
2085 if (ret)
2086 goto out;
2087 type = (u8)arg;
2088 break;
2089 case Opt_res_scope:
2090 ret = match_int(args, &arg);
2091 if (ret)
2092 goto out;
2093 break;
2094 case Opt_res_all_tg_pt:
2095 ret = match_int(args, &arg);
2096 if (ret)
2097 goto out;
2098 all_tg_pt = (int)arg;
2099 break;
2100 case Opt_mapped_lun:
2101 ret = match_u64(args, &tmp_ll);
2102 if (ret)
2103 goto out;
2104 mapped_lun = (u64)tmp_ll;
2105 break;
2106 /*
2107 * PR APTPL Metadata for Target Port
2108 */
2109 case Opt_target_fabric:
2110 t_fabric = match_strdup(args);
2111 if (!t_fabric) {
2112 ret = -ENOMEM;
2113 goto out;
2114 }
2115 break;
2116 case Opt_target_node:
2117 t_port = match_strdup(args);
2118 if (!t_port) {
2119 ret = -ENOMEM;
2120 goto out;
2121 }
2122 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2123 pr_err("APTPL metadata target_node="
2124 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2125 PR_APTPL_MAX_TPORT_LEN);
2126 ret = -EINVAL;
2127 break;
2128 }
2129 break;
2130 case Opt_tpgt:
2131 ret = match_int(args, &arg);
2132 if (ret)
2133 goto out;
2134 tpgt = (u16)arg;
2135 break;
2136 case Opt_port_rtpi:
2137 ret = match_int(args, &arg);
2138 if (ret)
2139 goto out;
2140 break;
2141 case Opt_target_lun:
2142 ret = match_u64(args, &tmp_ll);
2143 if (ret)
2144 goto out;
2145 target_lun = (u64)tmp_ll;
2146 break;
2147 default:
2148 break;
2149 }
2150 }
2151
2152 if (!i_port || !t_port || !sa_res_key) {
2153 pr_err("Illegal parameters for APTPL registration\n");
2154 ret = -EINVAL;
2155 goto out;
2156 }
2157
2158 if (res_holder && !(type)) {
2159 pr_err("Illegal PR type: 0x%02x for reservation"
2160 " holder\n", type);
2161 ret = -EINVAL;
2162 goto out;
2163 }
2164
2165 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2166 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2167 res_holder, all_tg_pt, type);
2168out:
2169 kfree(i_fabric);
2170 kfree(i_port);
2171 kfree(isid);
2172 kfree(t_fabric);
2173 kfree(t_port);
2174 kfree(orig);
2175 return (ret == 0) ? count : ret;
2176}
2177
2178
2179CONFIGFS_ATTR_RO(target_pr_, res_holder);
2180CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2181CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2182CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2183CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2184CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2185CONFIGFS_ATTR_RO(target_pr_, res_type);
2186CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2187CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2188
2189static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2190 &target_pr_attr_res_holder,
2191 &target_pr_attr_res_pr_all_tgt_pts,
2192 &target_pr_attr_res_pr_generation,
2193 &target_pr_attr_res_pr_holder_tg_port,
2194 &target_pr_attr_res_pr_registered_i_pts,
2195 &target_pr_attr_res_pr_type,
2196 &target_pr_attr_res_type,
2197 &target_pr_attr_res_aptpl_active,
2198 &target_pr_attr_res_aptpl_metadata,
2199 NULL,
2200};
2201
2202TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2203
2204/* End functions for struct config_item_type tb_dev_pr_cit */
2205
2206/* Start functions for struct config_item_type tb_dev_cit */
2207
2208static inline struct se_device *to_device(struct config_item *item)
2209{
2210 return container_of(to_config_group(item), struct se_device, dev_group);
2211}
2212
2213static ssize_t target_dev_info_show(struct config_item *item, char *page)
2214{
2215 struct se_device *dev = to_device(item);
2216 int bl = 0;
2217 ssize_t read_bytes = 0;
2218
2219 transport_dump_dev_state(dev, page, &bl);
2220 read_bytes += bl;
2221 read_bytes += dev->transport->show_configfs_dev_params(dev,
2222 page+read_bytes);
2223 return read_bytes;
2224}
2225
2226static ssize_t target_dev_control_store(struct config_item *item,
2227 const char *page, size_t count)
2228{
2229 struct se_device *dev = to_device(item);
2230
2231 return dev->transport->set_configfs_dev_params(dev, page, count);
2232}
2233
2234static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2235{
2236 struct se_device *dev = to_device(item);
2237
2238 if (!(dev->dev_flags & DF_USING_ALIAS))
2239 return 0;
2240
2241 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2242}
2243
2244static ssize_t target_dev_alias_store(struct config_item *item,
2245 const char *page, size_t count)
2246{
2247 struct se_device *dev = to_device(item);
2248 struct se_hba *hba = dev->se_hba;
2249 ssize_t read_bytes;
2250
2251 if (count > (SE_DEV_ALIAS_LEN-1)) {
2252 pr_err("alias count: %d exceeds"
2253 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2254 SE_DEV_ALIAS_LEN-1);
2255 return -EINVAL;
2256 }
2257
2258 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2259 if (!read_bytes)
2260 return -EINVAL;
2261 if (dev->dev_alias[read_bytes - 1] == '\n')
2262 dev->dev_alias[read_bytes - 1] = '\0';
2263
2264 dev->dev_flags |= DF_USING_ALIAS;
2265
2266 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2267 config_item_name(&hba->hba_group.cg_item),
2268 config_item_name(&dev->dev_group.cg_item),
2269 dev->dev_alias);
2270
2271 return read_bytes;
2272}
2273
2274static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2275{
2276 struct se_device *dev = to_device(item);
2277
2278 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2279 return 0;
2280
2281 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2282}
2283
2284static ssize_t target_dev_udev_path_store(struct config_item *item,
2285 const char *page, size_t count)
2286{
2287 struct se_device *dev = to_device(item);
2288 struct se_hba *hba = dev->se_hba;
2289 ssize_t read_bytes;
2290
2291 if (count > (SE_UDEV_PATH_LEN-1)) {
2292 pr_err("udev_path count: %d exceeds"
2293 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2294 SE_UDEV_PATH_LEN-1);
2295 return -EINVAL;
2296 }
2297
2298 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2299 "%s", page);
2300 if (!read_bytes)
2301 return -EINVAL;
2302 if (dev->udev_path[read_bytes - 1] == '\n')
2303 dev->udev_path[read_bytes - 1] = '\0';
2304
2305 dev->dev_flags |= DF_USING_UDEV_PATH;
2306
2307 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2308 config_item_name(&hba->hba_group.cg_item),
2309 config_item_name(&dev->dev_group.cg_item),
2310 dev->udev_path);
2311
2312 return read_bytes;
2313}
2314
2315static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2316{
2317 struct se_device *dev = to_device(item);
2318
2319 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2320}
2321
2322static ssize_t target_dev_enable_store(struct config_item *item,
2323 const char *page, size_t count)
2324{
2325 struct se_device *dev = to_device(item);
2326 char *ptr;
2327 int ret;
2328
2329 ptr = strstr(page, "1");
2330 if (!ptr) {
2331 pr_err("For dev_enable ops, only valid value"
2332 " is \"1\"\n");
2333 return -EINVAL;
2334 }
2335
2336 ret = target_configure_device(dev);
2337 if (ret)
2338 return ret;
2339 return count;
2340}
2341
2342static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2343{
2344 struct se_device *dev = to_device(item);
2345 struct config_item *lu_ci;
2346 struct t10_alua_lu_gp *lu_gp;
2347 struct t10_alua_lu_gp_member *lu_gp_mem;
2348 ssize_t len = 0;
2349
2350 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2351 if (!lu_gp_mem)
2352 return 0;
2353
2354 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2355 lu_gp = lu_gp_mem->lu_gp;
2356 if (lu_gp) {
2357 lu_ci = &lu_gp->lu_gp_group.cg_item;
2358 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2359 config_item_name(lu_ci), lu_gp->lu_gp_id);
2360 }
2361 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2362
2363 return len;
2364}
2365
2366static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2367 const char *page, size_t count)
2368{
2369 struct se_device *dev = to_device(item);
2370 struct se_hba *hba = dev->se_hba;
2371 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2372 struct t10_alua_lu_gp_member *lu_gp_mem;
2373 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2374 int move = 0;
2375
2376 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2377 if (!lu_gp_mem)
2378 return count;
2379
2380 if (count > LU_GROUP_NAME_BUF) {
2381 pr_err("ALUA LU Group Alias too large!\n");
2382 return -EINVAL;
2383 }
2384 memcpy(buf, page, count);
2385 /*
2386 * Any ALUA logical unit alias besides "NULL" means we will be
2387 * making a new group association.
2388 */
2389 if (strcmp(strstrip(buf), "NULL")) {
2390 /*
2391 * core_alua_get_lu_gp_by_name() will increment reference to
2392 * struct t10_alua_lu_gp. This reference is released with
2393 * core_alua_get_lu_gp_by_name below().
2394 */
2395 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2396 if (!lu_gp_new)
2397 return -ENODEV;
2398 }
2399
2400 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2401 lu_gp = lu_gp_mem->lu_gp;
2402 if (lu_gp) {
2403 /*
2404 * Clearing an existing lu_gp association, and replacing
2405 * with NULL
2406 */
2407 if (!lu_gp_new) {
2408 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2409 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2410 " %hu\n",
2411 config_item_name(&hba->hba_group.cg_item),
2412 config_item_name(&dev->dev_group.cg_item),
2413 config_item_name(&lu_gp->lu_gp_group.cg_item),
2414 lu_gp->lu_gp_id);
2415
2416 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2417 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2418
2419 return count;
2420 }
2421 /*
2422 * Removing existing association of lu_gp_mem with lu_gp
2423 */
2424 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2425 move = 1;
2426 }
2427 /*
2428 * Associate lu_gp_mem with lu_gp_new.
2429 */
2430 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2431 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2432
2433 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2434 " core/alua/lu_gps/%s, ID: %hu\n",
2435 (move) ? "Moving" : "Adding",
2436 config_item_name(&hba->hba_group.cg_item),
2437 config_item_name(&dev->dev_group.cg_item),
2438 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2439 lu_gp_new->lu_gp_id);
2440
2441 core_alua_put_lu_gp_from_name(lu_gp_new);
2442 return count;
2443}
2444
2445static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2446{
2447 struct se_device *dev = to_device(item);
2448 struct t10_alua_lba_map *map;
2449 struct t10_alua_lba_map_member *mem;
2450 char *b = page;
2451 int bl = 0;
2452 char state;
2453
2454 spin_lock(&dev->t10_alua.lba_map_lock);
2455 if (!list_empty(&dev->t10_alua.lba_map_list))
2456 bl += sprintf(b + bl, "%u %u\n",
2457 dev->t10_alua.lba_map_segment_size,
2458 dev->t10_alua.lba_map_segment_multiplier);
2459 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2460 bl += sprintf(b + bl, "%llu %llu",
2461 map->lba_map_first_lba, map->lba_map_last_lba);
2462 list_for_each_entry(mem, &map->lba_map_mem_list,
2463 lba_map_mem_list) {
2464 switch (mem->lba_map_mem_alua_state) {
2465 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2466 state = 'O';
2467 break;
2468 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2469 state = 'A';
2470 break;
2471 case ALUA_ACCESS_STATE_STANDBY:
2472 state = 'S';
2473 break;
2474 case ALUA_ACCESS_STATE_UNAVAILABLE:
2475 state = 'U';
2476 break;
2477 default:
2478 state = '.';
2479 break;
2480 }
2481 bl += sprintf(b + bl, " %d:%c",
2482 mem->lba_map_mem_alua_pg_id, state);
2483 }
2484 bl += sprintf(b + bl, "\n");
2485 }
2486 spin_unlock(&dev->t10_alua.lba_map_lock);
2487 return bl;
2488}
2489
2490static ssize_t target_dev_lba_map_store(struct config_item *item,
2491 const char *page, size_t count)
2492{
2493 struct se_device *dev = to_device(item);
2494 struct t10_alua_lba_map *lba_map = NULL;
2495 struct list_head lba_list;
2496 char *map_entries, *orig, *ptr;
2497 char state;
2498 int pg_num = -1, pg;
2499 int ret = 0, num = 0, pg_id, alua_state;
2500 unsigned long start_lba = -1, end_lba = -1;
2501 unsigned long segment_size = -1, segment_mult = -1;
2502
2503 orig = map_entries = kstrdup(page, GFP_KERNEL);
2504 if (!map_entries)
2505 return -ENOMEM;
2506
2507 INIT_LIST_HEAD(&lba_list);
2508 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2509 if (!*ptr)
2510 continue;
2511
2512 if (num == 0) {
2513 if (sscanf(ptr, "%lu %lu\n",
2514 &segment_size, &segment_mult) != 2) {
2515 pr_err("Invalid line %d\n", num);
2516 ret = -EINVAL;
2517 break;
2518 }
2519 num++;
2520 continue;
2521 }
2522 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2523 pr_err("Invalid line %d\n", num);
2524 ret = -EINVAL;
2525 break;
2526 }
2527 ptr = strchr(ptr, ' ');
2528 if (!ptr) {
2529 pr_err("Invalid line %d, missing end lba\n", num);
2530 ret = -EINVAL;
2531 break;
2532 }
2533 ptr++;
2534 ptr = strchr(ptr, ' ');
2535 if (!ptr) {
2536 pr_err("Invalid line %d, missing state definitions\n",
2537 num);
2538 ret = -EINVAL;
2539 break;
2540 }
2541 ptr++;
2542 lba_map = core_alua_allocate_lba_map(&lba_list,
2543 start_lba, end_lba);
2544 if (IS_ERR(lba_map)) {
2545 ret = PTR_ERR(lba_map);
2546 break;
2547 }
2548 pg = 0;
2549 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2550 switch (state) {
2551 case 'O':
2552 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2553 break;
2554 case 'A':
2555 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2556 break;
2557 case 'S':
2558 alua_state = ALUA_ACCESS_STATE_STANDBY;
2559 break;
2560 case 'U':
2561 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2562 break;
2563 default:
2564 pr_err("Invalid ALUA state '%c'\n", state);
2565 ret = -EINVAL;
2566 goto out;
2567 }
2568
2569 ret = core_alua_allocate_lba_map_mem(lba_map,
2570 pg_id, alua_state);
2571 if (ret) {
2572 pr_err("Invalid target descriptor %d:%c "
2573 "at line %d\n",
2574 pg_id, state, num);
2575 break;
2576 }
2577 pg++;
2578 ptr = strchr(ptr, ' ');
2579 if (ptr)
2580 ptr++;
2581 else
2582 break;
2583 }
2584 if (pg_num == -1)
2585 pg_num = pg;
2586 else if (pg != pg_num) {
2587 pr_err("Only %d from %d port groups definitions "
2588 "at line %d\n", pg, pg_num, num);
2589 ret = -EINVAL;
2590 break;
2591 }
2592 num++;
2593 }
2594out:
2595 if (ret) {
2596 core_alua_free_lba_map(&lba_list);
2597 count = ret;
2598 } else
2599 core_alua_set_lba_map(dev, &lba_list,
2600 segment_size, segment_mult);
2601 kfree(orig);
2602 return count;
2603}
2604
2605CONFIGFS_ATTR_RO(target_dev_, info);
2606CONFIGFS_ATTR_WO(target_dev_, control);
2607CONFIGFS_ATTR(target_dev_, alias);
2608CONFIGFS_ATTR(target_dev_, udev_path);
2609CONFIGFS_ATTR(target_dev_, enable);
2610CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2611CONFIGFS_ATTR(target_dev_, lba_map);
2612
2613static struct configfs_attribute *target_core_dev_attrs[] = {
2614 &target_dev_attr_info,
2615 &target_dev_attr_control,
2616 &target_dev_attr_alias,
2617 &target_dev_attr_udev_path,
2618 &target_dev_attr_enable,
2619 &target_dev_attr_alua_lu_gp,
2620 &target_dev_attr_lba_map,
2621 NULL,
2622};
2623
2624static void target_core_dev_release(struct config_item *item)
2625{
2626 struct config_group *dev_cg = to_config_group(item);
2627 struct se_device *dev =
2628 container_of(dev_cg, struct se_device, dev_group);
2629
2630 target_free_device(dev);
2631}
2632
2633/*
2634 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2635 * within target_fabric_port_link()
2636 */
2637struct configfs_item_operations target_core_dev_item_ops = {
2638 .release = target_core_dev_release,
2639};
2640
2641TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2642
2643/* End functions for struct config_item_type tb_dev_cit */
2644
2645/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2646
2647static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2648{
2649 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2650 lu_gp_group);
2651}
2652
2653static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2654{
2655 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2656
2657 if (!lu_gp->lu_gp_valid_id)
2658 return 0;
2659 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2660}
2661
2662static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2663 const char *page, size_t count)
2664{
2665 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2666 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2667 unsigned long lu_gp_id;
2668 int ret;
2669
2670 ret = kstrtoul(page, 0, &lu_gp_id);
2671 if (ret < 0) {
2672 pr_err("kstrtoul() returned %d for"
2673 " lu_gp_id\n", ret);
2674 return ret;
2675 }
2676 if (lu_gp_id > 0x0000ffff) {
2677 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2678 " 0x0000ffff\n", lu_gp_id);
2679 return -EINVAL;
2680 }
2681
2682 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2683 if (ret < 0)
2684 return -EINVAL;
2685
2686 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2687 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2688 config_item_name(&alua_lu_gp_cg->cg_item),
2689 lu_gp->lu_gp_id);
2690
2691 return count;
2692}
2693
2694static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2695{
2696 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2697 struct se_device *dev;
2698 struct se_hba *hba;
2699 struct t10_alua_lu_gp_member *lu_gp_mem;
2700 ssize_t len = 0, cur_len;
2701 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2702
2703 spin_lock(&lu_gp->lu_gp_lock);
2704 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2705 dev = lu_gp_mem->lu_gp_mem_dev;
2706 hba = dev->se_hba;
2707
2708 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2709 config_item_name(&hba->hba_group.cg_item),
2710 config_item_name(&dev->dev_group.cg_item));
2711 cur_len++; /* Extra byte for NULL terminator */
2712
2713 if ((cur_len + len) > PAGE_SIZE) {
2714 pr_warn("Ran out of lu_gp_show_attr"
2715 "_members buffer\n");
2716 break;
2717 }
2718 memcpy(page+len, buf, cur_len);
2719 len += cur_len;
2720 }
2721 spin_unlock(&lu_gp->lu_gp_lock);
2722
2723 return len;
2724}
2725
2726CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2727CONFIGFS_ATTR_RO(target_lu_gp_, members);
2728
2729static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2730 &target_lu_gp_attr_lu_gp_id,
2731 &target_lu_gp_attr_members,
2732 NULL,
2733};
2734
2735static void target_core_alua_lu_gp_release(struct config_item *item)
2736{
2737 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2738 struct t10_alua_lu_gp, lu_gp_group);
2739
2740 core_alua_free_lu_gp(lu_gp);
2741}
2742
2743static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2744 .release = target_core_alua_lu_gp_release,
2745};
2746
2747static const struct config_item_type target_core_alua_lu_gp_cit = {
2748 .ct_item_ops = &target_core_alua_lu_gp_ops,
2749 .ct_attrs = target_core_alua_lu_gp_attrs,
2750 .ct_owner = THIS_MODULE,
2751};
2752
2753/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2754
2755/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2756
2757static struct config_group *target_core_alua_create_lu_gp(
2758 struct config_group *group,
2759 const char *name)
2760{
2761 struct t10_alua_lu_gp *lu_gp;
2762 struct config_group *alua_lu_gp_cg = NULL;
2763 struct config_item *alua_lu_gp_ci = NULL;
2764
2765 lu_gp = core_alua_allocate_lu_gp(name, 0);
2766 if (IS_ERR(lu_gp))
2767 return NULL;
2768
2769 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2770 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2771
2772 config_group_init_type_name(alua_lu_gp_cg, name,
2773 &target_core_alua_lu_gp_cit);
2774
2775 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2776 " Group: core/alua/lu_gps/%s\n",
2777 config_item_name(alua_lu_gp_ci));
2778
2779 return alua_lu_gp_cg;
2780
2781}
2782
2783static void target_core_alua_drop_lu_gp(
2784 struct config_group *group,
2785 struct config_item *item)
2786{
2787 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2788 struct t10_alua_lu_gp, lu_gp_group);
2789
2790 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2791 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2792 config_item_name(item), lu_gp->lu_gp_id);
2793 /*
2794 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2795 * -> target_core_alua_lu_gp_release()
2796 */
2797 config_item_put(item);
2798}
2799
2800static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2801 .make_group = &target_core_alua_create_lu_gp,
2802 .drop_item = &target_core_alua_drop_lu_gp,
2803};
2804
2805static const struct config_item_type target_core_alua_lu_gps_cit = {
2806 .ct_item_ops = NULL,
2807 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2808 .ct_owner = THIS_MODULE,
2809};
2810
2811/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2812
2813/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2814
2815static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2816{
2817 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2818 tg_pt_gp_group);
2819}
2820
2821static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2822 char *page)
2823{
2824 return sprintf(page, "%d\n",
2825 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2826}
2827
2828static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2829 const char *page, size_t count)
2830{
2831 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2832 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2833 unsigned long tmp;
2834 int new_state, ret;
2835
2836 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2837 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2838 return -EINVAL;
2839 }
2840 if (!target_dev_configured(dev)) {
2841 pr_err("Unable to set alua_access_state while device is"
2842 " not configured\n");
2843 return -ENODEV;
2844 }
2845
2846 ret = kstrtoul(page, 0, &tmp);
2847 if (ret < 0) {
2848 pr_err("Unable to extract new ALUA access state from"
2849 " %s\n", page);
2850 return ret;
2851 }
2852 new_state = (int)tmp;
2853
2854 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2855 pr_err("Unable to process implicit configfs ALUA"
2856 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2857 return -EINVAL;
2858 }
2859 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2860 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2861 /* LBA DEPENDENT is only allowed with implicit ALUA */
2862 pr_err("Unable to process implicit configfs ALUA transition"
2863 " while explicit ALUA management is enabled\n");
2864 return -EINVAL;
2865 }
2866
2867 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2868 NULL, NULL, new_state, 0);
2869 return (!ret) ? count : -EINVAL;
2870}
2871
2872static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2873 char *page)
2874{
2875 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2876 return sprintf(page, "%s\n",
2877 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2878}
2879
2880static ssize_t target_tg_pt_gp_alua_access_status_store(
2881 struct config_item *item, const char *page, size_t count)
2882{
2883 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2884 unsigned long tmp;
2885 int new_status, ret;
2886
2887 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2888 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2889 return -EINVAL;
2890 }
2891
2892 ret = kstrtoul(page, 0, &tmp);
2893 if (ret < 0) {
2894 pr_err("Unable to extract new ALUA access status"
2895 " from %s\n", page);
2896 return ret;
2897 }
2898 new_status = (int)tmp;
2899
2900 if ((new_status != ALUA_STATUS_NONE) &&
2901 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2902 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2903 pr_err("Illegal ALUA access status: 0x%02x\n",
2904 new_status);
2905 return -EINVAL;
2906 }
2907
2908 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2909 return count;
2910}
2911
2912static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2913 char *page)
2914{
2915 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2916}
2917
2918static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2919 const char *page, size_t count)
2920{
2921 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2922}
2923
2924#define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2925static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2926 struct config_item *item, char *p) \
2927{ \
2928 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2929 return sprintf(p, "%d\n", \
2930 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2931} \
2932 \
2933static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2934 struct config_item *item, const char *p, size_t c) \
2935{ \
2936 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2937 unsigned long tmp; \
2938 int ret; \
2939 \
2940 if (!t->tg_pt_gp_valid_id) { \
2941 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2942 return -EINVAL; \
2943 } \
2944 \
2945 ret = kstrtoul(p, 0, &tmp); \
2946 if (ret < 0) { \
2947 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2948 return -EINVAL; \
2949 } \
2950 if (tmp > 1) { \
2951 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2952 return -EINVAL; \
2953 } \
2954 if (tmp) \
2955 t->tg_pt_gp_alua_supported_states |= _bit; \
2956 else \
2957 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2958 \
2959 return c; \
2960}
2961
2962ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2963ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2964ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2965ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2966ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2967ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2968ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2969
2970static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2971 struct config_item *item, char *page)
2972{
2973 return sprintf(page, "%d\n",
2974 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2975}
2976
2977static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2978 struct config_item *item, const char *page, size_t count)
2979{
2980 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2981 unsigned long tmp;
2982 int ret;
2983
2984 ret = kstrtoul(page, 0, &tmp);
2985 if (ret < 0) {
2986 pr_err("Unable to extract alua_write_metadata\n");
2987 return ret;
2988 }
2989
2990 if ((tmp != 0) && (tmp != 1)) {
2991 pr_err("Illegal value for alua_write_metadata:"
2992 " %lu\n", tmp);
2993 return -EINVAL;
2994 }
2995 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2996
2997 return count;
2998}
2999
3000static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
3001 char *page)
3002{
3003 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
3004}
3005
3006static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
3007 const char *page, size_t count)
3008{
3009 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
3010 count);
3011}
3012
3013static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
3014 char *page)
3015{
3016 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
3017}
3018
3019static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
3020 const char *page, size_t count)
3021{
3022 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
3023 count);
3024}
3025
3026static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
3027 struct config_item *item, char *page)
3028{
3029 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
3030}
3031
3032static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3033 struct config_item *item, const char *page, size_t count)
3034{
3035 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3036 count);
3037}
3038
3039static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3040 char *page)
3041{
3042 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3043}
3044
3045static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3046 const char *page, size_t count)
3047{
3048 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3049}
3050
3051static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3052 char *page)
3053{
3054 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3055
3056 if (!tg_pt_gp->tg_pt_gp_valid_id)
3057 return 0;
3058 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3059}
3060
3061static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3062 const char *page, size_t count)
3063{
3064 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3065 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3066 unsigned long tg_pt_gp_id;
3067 int ret;
3068
3069 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3070 if (ret < 0) {
3071 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3072 page);
3073 return ret;
3074 }
3075 if (tg_pt_gp_id > 0x0000ffff) {
3076 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3077 tg_pt_gp_id);
3078 return -EINVAL;
3079 }
3080
3081 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3082 if (ret < 0)
3083 return -EINVAL;
3084
3085 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3086 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3087 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3088 tg_pt_gp->tg_pt_gp_id);
3089
3090 return count;
3091}
3092
3093static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3094 char *page)
3095{
3096 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3097 struct se_lun *lun;
3098 ssize_t len = 0, cur_len;
3099 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3100
3101 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3102 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3103 lun_tg_pt_gp_link) {
3104 struct se_portal_group *tpg = lun->lun_tpg;
3105
3106 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3107 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3108 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3109 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3110 config_item_name(&lun->lun_group.cg_item));
3111 cur_len++; /* Extra byte for NULL terminator */
3112
3113 if ((cur_len + len) > PAGE_SIZE) {
3114 pr_warn("Ran out of lu_gp_show_attr"
3115 "_members buffer\n");
3116 break;
3117 }
3118 memcpy(page+len, buf, cur_len);
3119 len += cur_len;
3120 }
3121 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3122
3123 return len;
3124}
3125
3126CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3127CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3128CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3129CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3130CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3131CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3132CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3133CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3134CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3135CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3136CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3137CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3138CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3139CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3140CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3141CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3142CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3143
3144static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3145 &target_tg_pt_gp_attr_alua_access_state,
3146 &target_tg_pt_gp_attr_alua_access_status,
3147 &target_tg_pt_gp_attr_alua_access_type,
3148 &target_tg_pt_gp_attr_alua_support_transitioning,
3149 &target_tg_pt_gp_attr_alua_support_offline,
3150 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3151 &target_tg_pt_gp_attr_alua_support_unavailable,
3152 &target_tg_pt_gp_attr_alua_support_standby,
3153 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3154 &target_tg_pt_gp_attr_alua_support_active_optimized,
3155 &target_tg_pt_gp_attr_alua_write_metadata,
3156 &target_tg_pt_gp_attr_nonop_delay_msecs,
3157 &target_tg_pt_gp_attr_trans_delay_msecs,
3158 &target_tg_pt_gp_attr_implicit_trans_secs,
3159 &target_tg_pt_gp_attr_preferred,
3160 &target_tg_pt_gp_attr_tg_pt_gp_id,
3161 &target_tg_pt_gp_attr_members,
3162 NULL,
3163};
3164
3165static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3166{
3167 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3168 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3169
3170 core_alua_free_tg_pt_gp(tg_pt_gp);
3171}
3172
3173static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3174 .release = target_core_alua_tg_pt_gp_release,
3175};
3176
3177static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3178 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3179 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3180 .ct_owner = THIS_MODULE,
3181};
3182
3183/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3184
3185/* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3186
3187static struct config_group *target_core_alua_create_tg_pt_gp(
3188 struct config_group *group,
3189 const char *name)
3190{
3191 struct t10_alua *alua = container_of(group, struct t10_alua,
3192 alua_tg_pt_gps_group);
3193 struct t10_alua_tg_pt_gp *tg_pt_gp;
3194 struct config_group *alua_tg_pt_gp_cg = NULL;
3195 struct config_item *alua_tg_pt_gp_ci = NULL;
3196
3197 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3198 if (!tg_pt_gp)
3199 return NULL;
3200
3201 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3202 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3203
3204 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3205 &target_core_alua_tg_pt_gp_cit);
3206
3207 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3208 " Group: alua/tg_pt_gps/%s\n",
3209 config_item_name(alua_tg_pt_gp_ci));
3210
3211 return alua_tg_pt_gp_cg;
3212}
3213
3214static void target_core_alua_drop_tg_pt_gp(
3215 struct config_group *group,
3216 struct config_item *item)
3217{
3218 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3219 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3220
3221 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3222 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3223 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3224 /*
3225 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3226 * -> target_core_alua_tg_pt_gp_release().
3227 */
3228 config_item_put(item);
3229}
3230
3231static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3232 .make_group = &target_core_alua_create_tg_pt_gp,
3233 .drop_item = &target_core_alua_drop_tg_pt_gp,
3234};
3235
3236TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3237
3238/* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3239
3240/* Start functions for struct config_item_type target_core_alua_cit */
3241
3242/*
3243 * target_core_alua_cit is a ConfigFS group that lives under
3244 * /sys/kernel/config/target/core/alua. There are default groups
3245 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3246 * target_core_alua_cit in target_core_init_configfs() below.
3247 */
3248static const struct config_item_type target_core_alua_cit = {
3249 .ct_item_ops = NULL,
3250 .ct_attrs = NULL,
3251 .ct_owner = THIS_MODULE,
3252};
3253
3254/* End functions for struct config_item_type target_core_alua_cit */
3255
3256/* Start functions for struct config_item_type tb_dev_stat_cit */
3257
3258static struct config_group *target_core_stat_mkdir(
3259 struct config_group *group,
3260 const char *name)
3261{
3262 return ERR_PTR(-ENOSYS);
3263}
3264
3265static void target_core_stat_rmdir(
3266 struct config_group *group,
3267 struct config_item *item)
3268{
3269 return;
3270}
3271
3272static struct configfs_group_operations target_core_stat_group_ops = {
3273 .make_group = &target_core_stat_mkdir,
3274 .drop_item = &target_core_stat_rmdir,
3275};
3276
3277TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3278
3279/* End functions for struct config_item_type tb_dev_stat_cit */
3280
3281/* Start functions for struct config_item_type target_core_hba_cit */
3282
3283static struct config_group *target_core_make_subdev(
3284 struct config_group *group,
3285 const char *name)
3286{
3287 struct t10_alua_tg_pt_gp *tg_pt_gp;
3288 struct config_item *hba_ci = &group->cg_item;
3289 struct se_hba *hba = item_to_hba(hba_ci);
3290 struct target_backend *tb = hba->backend;
3291 struct se_device *dev;
3292 int errno = -ENOMEM, ret;
3293
3294 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3295 if (ret)
3296 return ERR_PTR(ret);
3297
3298 dev = target_alloc_device(hba, name);
3299 if (!dev)
3300 goto out_unlock;
3301
3302 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3303
3304 config_group_init_type_name(&dev->dev_action_group, "action",
3305 &tb->tb_dev_action_cit);
3306 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3307
3308 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3309 &tb->tb_dev_attrib_cit);
3310 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3311
3312 config_group_init_type_name(&dev->dev_pr_group, "pr",
3313 &tb->tb_dev_pr_cit);
3314 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3315
3316 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3317 &tb->tb_dev_wwn_cit);
3318 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3319 &dev->dev_group);
3320
3321 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3322 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3323 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3324 &dev->dev_group);
3325
3326 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3327 "statistics", &tb->tb_dev_stat_cit);
3328 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3329 &dev->dev_group);
3330
3331 /*
3332 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3333 */
3334 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3335 if (!tg_pt_gp)
3336 goto out_free_device;
3337 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3338
3339 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3340 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3341 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3342 &dev->t10_alua.alua_tg_pt_gps_group);
3343
3344 /*
3345 * Add core/$HBA/$DEV/statistics/ default groups
3346 */
3347 target_stat_setup_dev_default_groups(dev);
3348
3349 mutex_lock(&target_devices_lock);
3350 target_devices++;
3351 mutex_unlock(&target_devices_lock);
3352
3353 mutex_unlock(&hba->hba_access_mutex);
3354 return &dev->dev_group;
3355
3356out_free_device:
3357 target_free_device(dev);
3358out_unlock:
3359 mutex_unlock(&hba->hba_access_mutex);
3360 return ERR_PTR(errno);
3361}
3362
3363static void target_core_drop_subdev(
3364 struct config_group *group,
3365 struct config_item *item)
3366{
3367 struct config_group *dev_cg = to_config_group(item);
3368 struct se_device *dev =
3369 container_of(dev_cg, struct se_device, dev_group);
3370 struct se_hba *hba;
3371
3372 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3373
3374 mutex_lock(&hba->hba_access_mutex);
3375
3376 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3377 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3378
3379 /*
3380 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3381 * directly from target_core_alua_tg_pt_gp_release().
3382 */
3383 dev->t10_alua.default_tg_pt_gp = NULL;
3384
3385 configfs_remove_default_groups(dev_cg);
3386
3387 /*
3388 * se_dev is released from target_core_dev_item_ops->release()
3389 */
3390 config_item_put(item);
3391
3392 mutex_lock(&target_devices_lock);
3393 target_devices--;
3394 mutex_unlock(&target_devices_lock);
3395
3396 mutex_unlock(&hba->hba_access_mutex);
3397}
3398
3399static struct configfs_group_operations target_core_hba_group_ops = {
3400 .make_group = target_core_make_subdev,
3401 .drop_item = target_core_drop_subdev,
3402};
3403
3404
3405static inline struct se_hba *to_hba(struct config_item *item)
3406{
3407 return container_of(to_config_group(item), struct se_hba, hba_group);
3408}
3409
3410static ssize_t target_hba_info_show(struct config_item *item, char *page)
3411{
3412 struct se_hba *hba = to_hba(item);
3413
3414 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3415 hba->hba_id, hba->backend->ops->name,
3416 TARGET_CORE_VERSION);
3417}
3418
3419static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3420{
3421 struct se_hba *hba = to_hba(item);
3422 int hba_mode = 0;
3423
3424 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3425 hba_mode = 1;
3426
3427 return sprintf(page, "%d\n", hba_mode);
3428}
3429
3430static ssize_t target_hba_mode_store(struct config_item *item,
3431 const char *page, size_t count)
3432{
3433 struct se_hba *hba = to_hba(item);
3434 unsigned long mode_flag;
3435 int ret;
3436
3437 if (hba->backend->ops->pmode_enable_hba == NULL)
3438 return -EINVAL;
3439
3440 ret = kstrtoul(page, 0, &mode_flag);
3441 if (ret < 0) {
3442 pr_err("Unable to extract hba mode flag: %d\n", ret);
3443 return ret;
3444 }
3445
3446 if (hba->dev_count) {
3447 pr_err("Unable to set hba_mode with active devices\n");
3448 return -EINVAL;
3449 }
3450
3451 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3452 if (ret < 0)
3453 return -EINVAL;
3454 if (ret > 0)
3455 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3456 else if (ret == 0)
3457 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3458
3459 return count;
3460}
3461
3462CONFIGFS_ATTR_RO(target_, hba_info);
3463CONFIGFS_ATTR(target_, hba_mode);
3464
3465static void target_core_hba_release(struct config_item *item)
3466{
3467 struct se_hba *hba = container_of(to_config_group(item),
3468 struct se_hba, hba_group);
3469 core_delete_hba(hba);
3470}
3471
3472static struct configfs_attribute *target_core_hba_attrs[] = {
3473 &target_attr_hba_info,
3474 &target_attr_hba_mode,
3475 NULL,
3476};
3477
3478static struct configfs_item_operations target_core_hba_item_ops = {
3479 .release = target_core_hba_release,
3480};
3481
3482static const struct config_item_type target_core_hba_cit = {
3483 .ct_item_ops = &target_core_hba_item_ops,
3484 .ct_group_ops = &target_core_hba_group_ops,
3485 .ct_attrs = target_core_hba_attrs,
3486 .ct_owner = THIS_MODULE,
3487};
3488
3489static struct config_group *target_core_call_addhbatotarget(
3490 struct config_group *group,
3491 const char *name)
3492{
3493 char *se_plugin_str, *str, *str2;
3494 struct se_hba *hba;
3495 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3496 unsigned long plugin_dep_id = 0;
3497 int ret;
3498
3499 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3500 pr_err("Passed *name strlen(): %d exceeds"
3501 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3502 TARGET_CORE_NAME_MAX_LEN);
3503 return ERR_PTR(-ENAMETOOLONG);
3504 }
3505 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3506
3507 str = strstr(buf, "_");
3508 if (!str) {
3509 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3510 return ERR_PTR(-EINVAL);
3511 }
3512 se_plugin_str = buf;
3513 /*
3514 * Special case for subsystem plugins that have "_" in their names.
3515 * Namely rd_direct and rd_mcp..
3516 */
3517 str2 = strstr(str+1, "_");
3518 if (str2) {
3519 *str2 = '\0'; /* Terminate for *se_plugin_str */
3520 str2++; /* Skip to start of plugin dependent ID */
3521 str = str2;
3522 } else {
3523 *str = '\0'; /* Terminate for *se_plugin_str */
3524 str++; /* Skip to start of plugin dependent ID */
3525 }
3526
3527 ret = kstrtoul(str, 0, &plugin_dep_id);
3528 if (ret < 0) {
3529 pr_err("kstrtoul() returned %d for"
3530 " plugin_dep_id\n", ret);
3531 return ERR_PTR(ret);
3532 }
3533 /*
3534 * Load up TCM subsystem plugins if they have not already been loaded.
3535 */
3536 transport_subsystem_check_init();
3537
3538 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3539 if (IS_ERR(hba))
3540 return ERR_CAST(hba);
3541
3542 config_group_init_type_name(&hba->hba_group, name,
3543 &target_core_hba_cit);
3544
3545 return &hba->hba_group;
3546}
3547
3548static void target_core_call_delhbafromtarget(
3549 struct config_group *group,
3550 struct config_item *item)
3551{
3552 /*
3553 * core_delete_hba() is called from target_core_hba_item_ops->release()
3554 * -> target_core_hba_release()
3555 */
3556 config_item_put(item);
3557}
3558
3559static struct configfs_group_operations target_core_group_ops = {
3560 .make_group = target_core_call_addhbatotarget,
3561 .drop_item = target_core_call_delhbafromtarget,
3562};
3563
3564static const struct config_item_type target_core_cit = {
3565 .ct_item_ops = NULL,
3566 .ct_group_ops = &target_core_group_ops,
3567 .ct_attrs = NULL,
3568 .ct_owner = THIS_MODULE,
3569};
3570
3571/* Stop functions for struct config_item_type target_core_hba_cit */
3572
3573void target_setup_backend_cits(struct target_backend *tb)
3574{
3575 target_core_setup_dev_cit(tb);
3576 target_core_setup_dev_action_cit(tb);
3577 target_core_setup_dev_attrib_cit(tb);
3578 target_core_setup_dev_pr_cit(tb);
3579 target_core_setup_dev_wwn_cit(tb);
3580 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3581 target_core_setup_dev_stat_cit(tb);
3582}
3583
3584static void target_init_dbroot(void)
3585{
3586 struct file *fp;
3587
3588 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3589 fp = filp_open(db_root_stage, O_RDONLY, 0);
3590 if (IS_ERR(fp)) {
3591 pr_err("db_root: cannot open: %s\n", db_root_stage);
3592 return;
3593 }
3594 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3595 filp_close(fp, NULL);
3596 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3597 return;
3598 }
3599 filp_close(fp, NULL);
3600
3601 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3602 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3603}
3604
3605static int __init target_core_init_configfs(void)
3606{
3607 struct configfs_subsystem *subsys = &target_core_fabrics;
3608 struct t10_alua_lu_gp *lu_gp;
3609 int ret;
3610
3611 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3612 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3613 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3614
3615 config_group_init(&subsys->su_group);
3616 mutex_init(&subsys->su_mutex);
3617
3618 ret = init_se_kmem_caches();
3619 if (ret < 0)
3620 return ret;
3621 /*
3622 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3623 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3624 */
3625 config_group_init_type_name(&target_core_hbagroup, "core",
3626 &target_core_cit);
3627 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3628
3629 /*
3630 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3631 */
3632 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3633 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3634
3635 /*
3636 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3637 * groups under /sys/kernel/config/target/core/alua/
3638 */
3639 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3640 &target_core_alua_lu_gps_cit);
3641 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3642
3643 /*
3644 * Add core/alua/lu_gps/default_lu_gp
3645 */
3646 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3647 if (IS_ERR(lu_gp)) {
3648 ret = -ENOMEM;
3649 goto out_global;
3650 }
3651
3652 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3653 &target_core_alua_lu_gp_cit);
3654 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3655
3656 default_lu_gp = lu_gp;
3657
3658 /*
3659 * Register the target_core_mod subsystem with configfs.
3660 */
3661 ret = configfs_register_subsystem(subsys);
3662 if (ret < 0) {
3663 pr_err("Error %d while registering subsystem %s\n",
3664 ret, subsys->su_group.cg_item.ci_namebuf);
3665 goto out_global;
3666 }
3667 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3668 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3669 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3670 /*
3671 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3672 */
3673 ret = rd_module_init();
3674 if (ret < 0)
3675 goto out;
3676
3677 ret = core_dev_setup_virtual_lun0();
3678 if (ret < 0)
3679 goto out;
3680
3681 ret = target_xcopy_setup_pt();
3682 if (ret < 0)
3683 goto out;
3684
3685 target_init_dbroot();
3686
3687 return 0;
3688
3689out:
3690 configfs_unregister_subsystem(subsys);
3691 core_dev_release_virtual_lun0();
3692 rd_module_exit();
3693out_global:
3694 if (default_lu_gp) {
3695 core_alua_free_lu_gp(default_lu_gp);
3696 default_lu_gp = NULL;
3697 }
3698 release_se_kmem_caches();
3699 return ret;
3700}
3701
3702static void __exit target_core_exit_configfs(void)
3703{
3704 configfs_remove_default_groups(&alua_lu_gps_group);
3705 configfs_remove_default_groups(&alua_group);
3706 configfs_remove_default_groups(&target_core_hbagroup);
3707
3708 /*
3709 * We expect subsys->su_group.default_groups to be released
3710 * by configfs subsystem provider logic..
3711 */
3712 configfs_unregister_subsystem(&target_core_fabrics);
3713
3714 core_alua_free_lu_gp(default_lu_gp);
3715 default_lu_gp = NULL;
3716
3717 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3718 " Infrastructure\n");
3719
3720 core_dev_release_virtual_lun0();
3721 rd_module_exit();
3722 target_xcopy_release_pt();
3723 release_se_kmem_caches();
3724}
3725
3726MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3727MODULE_AUTHOR("nab@Linux-iSCSI.org");
3728MODULE_LICENSE("GPL");
3729
3730module_init(target_core_init_configfs);
3731module_exit(target_core_exit_configfs);