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