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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#include <target/target_core_fabric_configfs.h>
44#include <target/target_core_configfs.h>
45#include <target/configfs_macros.h>
46
47#include "target_core_internal.h"
48#include "target_core_alua.h"
49#include "target_core_pr.h"
50#include "target_core_rd.h"
51#include "target_core_xcopy.h"
52
53extern struct t10_alua_lu_gp *default_lu_gp;
54
55static LIST_HEAD(g_tf_list);
56static DEFINE_MUTEX(g_tf_lock);
57
58struct target_core_configfs_attribute {
59 struct configfs_attribute attr;
60 ssize_t (*show)(void *, char *);
61 ssize_t (*store)(void *, const char *, size_t);
62};
63
64static struct config_group target_core_hbagroup;
65static struct config_group alua_group;
66static struct config_group alua_lu_gps_group;
67
68static inline struct se_hba *
69item_to_hba(struct config_item *item)
70{
71 return container_of(to_config_group(item), struct se_hba, hba_group);
72}
73
74/*
75 * Attributes for /sys/kernel/config/target/
76 */
77static ssize_t target_core_attr_show(struct config_item *item,
78 struct configfs_attribute *attr,
79 char *page)
80{
81 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
82 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_CONFIGFS_VERSION,
83 utsname()->sysname, utsname()->machine);
84}
85
86static struct configfs_item_operations target_core_fabric_item_ops = {
87 .show_attribute = target_core_attr_show,
88};
89
90static struct configfs_attribute target_core_item_attr_version = {
91 .ca_owner = THIS_MODULE,
92 .ca_name = "version",
93 .ca_mode = S_IRUGO,
94};
95
96static struct target_fabric_configfs *target_core_get_fabric(
97 const char *name)
98{
99 struct target_fabric_configfs *tf;
100
101 if (!name)
102 return NULL;
103
104 mutex_lock(&g_tf_lock);
105 list_for_each_entry(tf, &g_tf_list, tf_list) {
106 if (!strcmp(tf->tf_name, name)) {
107 atomic_inc(&tf->tf_access_cnt);
108 mutex_unlock(&g_tf_lock);
109 return tf;
110 }
111 }
112 mutex_unlock(&g_tf_lock);
113
114 return NULL;
115}
116
117/*
118 * Called from struct target_core_group_ops->make_group()
119 */
120static struct config_group *target_core_register_fabric(
121 struct config_group *group,
122 const char *name)
123{
124 struct target_fabric_configfs *tf;
125 int ret;
126
127 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
128 " %s\n", group, name);
129 /*
130 * Below are some hardcoded request_module() calls to automatically
131 * local fabric modules when the following is called:
132 *
133 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
134 *
135 * Note that this does not limit which TCM fabric module can be
136 * registered, but simply provids auto loading logic for modules with
137 * mkdir(2) system calls with known TCM fabric modules.
138 */
139 if (!strncmp(name, "iscsi", 5)) {
140 /*
141 * Automatically load the LIO Target fabric module when the
142 * following is called:
143 *
144 * mkdir -p $CONFIGFS/target/iscsi
145 */
146 ret = request_module("iscsi_target_mod");
147 if (ret < 0) {
148 pr_err("request_module() failed for"
149 " iscsi_target_mod.ko: %d\n", ret);
150 return ERR_PTR(-EINVAL);
151 }
152 } else if (!strncmp(name, "loopback", 8)) {
153 /*
154 * Automatically load the tcm_loop fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/loopback
158 */
159 ret = request_module("tcm_loop");
160 if (ret < 0) {
161 pr_err("request_module() failed for"
162 " tcm_loop.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 }
166
167 tf = target_core_get_fabric(name);
168 if (!tf) {
169 pr_err("target_core_get_fabric() failed for %s\n",
170 name);
171 return ERR_PTR(-EINVAL);
172 }
173 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
174 " %s\n", tf->tf_name);
175 /*
176 * On a successful target_core_get_fabric() look, the returned
177 * struct target_fabric_configfs *tf will contain a usage reference.
178 */
179 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
180 &tf->tf_cit_tmpl.tfc_wwn_cit);
181
182 tf->tf_group.default_groups = tf->tf_default_groups;
183 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
184 tf->tf_group.default_groups[1] = NULL;
185
186 config_group_init_type_name(&tf->tf_group, name,
187 &tf->tf_cit_tmpl.tfc_wwn_cit);
188 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
189 &tf->tf_cit_tmpl.tfc_discovery_cit);
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
192 " %s\n", tf->tf_group.cg_item.ci_name);
193 /*
194 * Setup tf_ops.tf_subsys pointer for usage with configfs_depend_item()
195 */
196 tf->tf_ops.tf_subsys = tf->tf_subsys;
197 tf->tf_fabric = &tf->tf_group.cg_item;
198 pr_debug("Target_Core_ConfigFS: REGISTER -> Set tf->tf_fabric"
199 " for %s\n", name);
200
201 return &tf->tf_group;
202}
203
204/*
205 * Called from struct target_core_group_ops->drop_item()
206 */
207static void target_core_deregister_fabric(
208 struct config_group *group,
209 struct config_item *item)
210{
211 struct target_fabric_configfs *tf = container_of(
212 to_config_group(item), struct target_fabric_configfs, tf_group);
213 struct config_group *tf_group;
214 struct config_item *df_item;
215 int i;
216
217 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
218 " tf list\n", config_item_name(item));
219
220 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
221 " %s\n", tf->tf_name);
222 atomic_dec(&tf->tf_access_cnt);
223
224 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing"
225 " tf->tf_fabric for %s\n", tf->tf_name);
226 tf->tf_fabric = NULL;
227
228 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
229 " %s\n", config_item_name(item));
230
231 tf_group = &tf->tf_group;
232 for (i = 0; tf_group->default_groups[i]; i++) {
233 df_item = &tf_group->default_groups[i]->cg_item;
234 tf_group->default_groups[i] = NULL;
235 config_item_put(df_item);
236 }
237 config_item_put(item);
238}
239
240static struct configfs_group_operations target_core_fabric_group_ops = {
241 .make_group = &target_core_register_fabric,
242 .drop_item = &target_core_deregister_fabric,
243};
244
245/*
246 * All item attributes appearing in /sys/kernel/target/ appear here.
247 */
248static struct configfs_attribute *target_core_fabric_item_attrs[] = {
249 &target_core_item_attr_version,
250 NULL,
251};
252
253/*
254 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
255 */
256static struct config_item_type target_core_fabrics_item = {
257 .ct_item_ops = &target_core_fabric_item_ops,
258 .ct_group_ops = &target_core_fabric_group_ops,
259 .ct_attrs = target_core_fabric_item_attrs,
260 .ct_owner = THIS_MODULE,
261};
262
263static struct configfs_subsystem target_core_fabrics = {
264 .su_group = {
265 .cg_item = {
266 .ci_namebuf = "target",
267 .ci_type = &target_core_fabrics_item,
268 },
269 },
270};
271
272struct configfs_subsystem *target_core_subsystem[] = {
273 &target_core_fabrics,
274 NULL,
275};
276
277/*##############################################################################
278// Start functions called by external Target Fabrics Modules
279//############################################################################*/
280
281/*
282 * First function called by fabric modules to:
283 *
284 * 1) Allocate a struct target_fabric_configfs and save the *fabric_cit pointer.
285 * 2) Add struct target_fabric_configfs to g_tf_list
286 * 3) Return struct target_fabric_configfs to fabric module to be passed
287 * into target_fabric_configfs_register().
288 */
289struct target_fabric_configfs *target_fabric_configfs_init(
290 struct module *fabric_mod,
291 const char *name)
292{
293 struct target_fabric_configfs *tf;
294
295 if (!(name)) {
296 pr_err("Unable to locate passed fabric name\n");
297 return ERR_PTR(-EINVAL);
298 }
299 if (strlen(name) >= TARGET_FABRIC_NAME_SIZE) {
300 pr_err("Passed name: %s exceeds TARGET_FABRIC"
301 "_NAME_SIZE\n", name);
302 return ERR_PTR(-EINVAL);
303 }
304
305 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
306 if (!tf)
307 return ERR_PTR(-ENOMEM);
308
309 INIT_LIST_HEAD(&tf->tf_list);
310 atomic_set(&tf->tf_access_cnt, 0);
311 /*
312 * Setup the default generic struct config_item_type's (cits) in
313 * struct target_fabric_configfs->tf_cit_tmpl
314 */
315 tf->tf_module = fabric_mod;
316 target_fabric_setup_cits(tf);
317
318 tf->tf_subsys = target_core_subsystem[0];
319 snprintf(tf->tf_name, TARGET_FABRIC_NAME_SIZE, "%s", name);
320
321 mutex_lock(&g_tf_lock);
322 list_add_tail(&tf->tf_list, &g_tf_list);
323 mutex_unlock(&g_tf_lock);
324
325 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>"
326 ">>>>>>>>>>>>>>\n");
327 pr_debug("Initialized struct target_fabric_configfs: %p for"
328 " %s\n", tf, tf->tf_name);
329 return tf;
330}
331EXPORT_SYMBOL(target_fabric_configfs_init);
332
333/*
334 * Called by fabric plugins after FAILED target_fabric_configfs_register() call.
335 */
336void target_fabric_configfs_free(
337 struct target_fabric_configfs *tf)
338{
339 mutex_lock(&g_tf_lock);
340 list_del(&tf->tf_list);
341 mutex_unlock(&g_tf_lock);
342
343 kfree(tf);
344}
345EXPORT_SYMBOL(target_fabric_configfs_free);
346
347/*
348 * Perform a sanity check of the passed tf->tf_ops before completing
349 * TCM fabric module registration.
350 */
351static int target_fabric_tf_ops_check(
352 struct target_fabric_configfs *tf)
353{
354 struct target_core_fabric_ops *tfo = &tf->tf_ops;
355
356 if (!tfo->get_fabric_name) {
357 pr_err("Missing tfo->get_fabric_name()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_fabric_proto_ident) {
361 pr_err("Missing tfo->get_fabric_proto_ident()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_get_default_depth) {
373 pr_err("Missing tfo->tpg_get_default_depth()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_get_pr_transport_id) {
377 pr_err("Missing tfo->tpg_get_pr_transport_id()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_pr_transport_id_len) {
381 pr_err("Missing tfo->tpg_get_pr_transport_id_len()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_demo_mode) {
385 pr_err("Missing tfo->tpg_check_demo_mode()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_check_demo_mode_cache) {
389 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
390 return -EINVAL;
391 }
392 if (!tfo->tpg_check_demo_mode_write_protect) {
393 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
394 return -EINVAL;
395 }
396 if (!tfo->tpg_check_prod_mode_write_protect) {
397 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
398 return -EINVAL;
399 }
400 if (!tfo->tpg_alloc_fabric_acl) {
401 pr_err("Missing tfo->tpg_alloc_fabric_acl()\n");
402 return -EINVAL;
403 }
404 if (!tfo->tpg_release_fabric_acl) {
405 pr_err("Missing tfo->tpg_release_fabric_acl()\n");
406 return -EINVAL;
407 }
408 if (!tfo->tpg_get_inst_index) {
409 pr_err("Missing tfo->tpg_get_inst_index()\n");
410 return -EINVAL;
411 }
412 if (!tfo->release_cmd) {
413 pr_err("Missing tfo->release_cmd()\n");
414 return -EINVAL;
415 }
416 if (!tfo->shutdown_session) {
417 pr_err("Missing tfo->shutdown_session()\n");
418 return -EINVAL;
419 }
420 if (!tfo->close_session) {
421 pr_err("Missing tfo->close_session()\n");
422 return -EINVAL;
423 }
424 if (!tfo->sess_get_index) {
425 pr_err("Missing tfo->sess_get_index()\n");
426 return -EINVAL;
427 }
428 if (!tfo->write_pending) {
429 pr_err("Missing tfo->write_pending()\n");
430 return -EINVAL;
431 }
432 if (!tfo->write_pending_status) {
433 pr_err("Missing tfo->write_pending_status()\n");
434 return -EINVAL;
435 }
436 if (!tfo->set_default_node_attributes) {
437 pr_err("Missing tfo->set_default_node_attributes()\n");
438 return -EINVAL;
439 }
440 if (!tfo->get_task_tag) {
441 pr_err("Missing tfo->get_task_tag()\n");
442 return -EINVAL;
443 }
444 if (!tfo->get_cmd_state) {
445 pr_err("Missing tfo->get_cmd_state()\n");
446 return -EINVAL;
447 }
448 if (!tfo->queue_data_in) {
449 pr_err("Missing tfo->queue_data_in()\n");
450 return -EINVAL;
451 }
452 if (!tfo->queue_status) {
453 pr_err("Missing tfo->queue_status()\n");
454 return -EINVAL;
455 }
456 if (!tfo->queue_tm_rsp) {
457 pr_err("Missing tfo->queue_tm_rsp()\n");
458 return -EINVAL;
459 }
460 if (!tfo->aborted_task) {
461 pr_err("Missing tfo->aborted_task()\n");
462 return -EINVAL;
463 }
464 /*
465 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
466 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
467 * target_core_fabric_configfs.c WWN+TPG group context code.
468 */
469 if (!tfo->fabric_make_wwn) {
470 pr_err("Missing tfo->fabric_make_wwn()\n");
471 return -EINVAL;
472 }
473 if (!tfo->fabric_drop_wwn) {
474 pr_err("Missing tfo->fabric_drop_wwn()\n");
475 return -EINVAL;
476 }
477 if (!tfo->fabric_make_tpg) {
478 pr_err("Missing tfo->fabric_make_tpg()\n");
479 return -EINVAL;
480 }
481 if (!tfo->fabric_drop_tpg) {
482 pr_err("Missing tfo->fabric_drop_tpg()\n");
483 return -EINVAL;
484 }
485
486 return 0;
487}
488
489/*
490 * Called 2nd from fabric module with returned parameter of
491 * struct target_fabric_configfs * from target_fabric_configfs_init().
492 *
493 * Upon a successful registration, the new fabric's struct config_item is
494 * return. Also, a pointer to this struct is set in the passed
495 * struct target_fabric_configfs.
496 */
497int target_fabric_configfs_register(
498 struct target_fabric_configfs *tf)
499{
500 int ret;
501
502 if (!tf) {
503 pr_err("Unable to locate target_fabric_configfs"
504 " pointer\n");
505 return -EINVAL;
506 }
507 if (!tf->tf_subsys) {
508 pr_err("Unable to target struct config_subsystem"
509 " pointer\n");
510 return -EINVAL;
511 }
512 ret = target_fabric_tf_ops_check(tf);
513 if (ret < 0)
514 return ret;
515
516 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>"
517 ">>>>>>>>>>\n");
518 return 0;
519}
520EXPORT_SYMBOL(target_fabric_configfs_register);
521
522void target_fabric_configfs_deregister(
523 struct target_fabric_configfs *tf)
524{
525 struct configfs_subsystem *su;
526
527 if (!tf) {
528 pr_err("Unable to locate passed target_fabric_"
529 "configfs\n");
530 return;
531 }
532 su = tf->tf_subsys;
533 if (!su) {
534 pr_err("Unable to locate passed tf->tf_subsys"
535 " pointer\n");
536 return;
537 }
538 pr_debug("<<<<<<<<<<<<<<<<<<<<<< BEGIN FABRIC API >>>>>>>>>>"
539 ">>>>>>>>>>>>\n");
540 mutex_lock(&g_tf_lock);
541 if (atomic_read(&tf->tf_access_cnt)) {
542 mutex_unlock(&g_tf_lock);
543 pr_err("Non zero tf->tf_access_cnt for fabric %s\n",
544 tf->tf_name);
545 BUG();
546 }
547 list_del(&tf->tf_list);
548 mutex_unlock(&g_tf_lock);
549
550 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing tf:"
551 " %s\n", tf->tf_name);
552 tf->tf_module = NULL;
553 tf->tf_subsys = NULL;
554 kfree(tf);
555
556 pr_debug("<<<<<<<<<<<<<<<<<<<<<< END FABRIC API >>>>>>>>>>>>>>>>>"
557 ">>>>>\n");
558}
559EXPORT_SYMBOL(target_fabric_configfs_deregister);
560
561/*##############################################################################
562// Stop functions called by external Target Fabrics Modules
563//############################################################################*/
564
565/* Start functions for struct config_item_type target_core_dev_attrib_cit */
566
567#define DEF_DEV_ATTRIB_SHOW(_name) \
568static ssize_t target_core_dev_show_attr_##_name( \
569 struct se_dev_attrib *da, \
570 char *page) \
571{ \
572 return snprintf(page, PAGE_SIZE, "%u\n", \
573 (u32)da->da_dev->dev_attrib._name); \
574}
575
576#define DEF_DEV_ATTRIB_STORE(_name) \
577static ssize_t target_core_dev_store_attr_##_name( \
578 struct se_dev_attrib *da, \
579 const char *page, \
580 size_t count) \
581{ \
582 unsigned long val; \
583 int ret; \
584 \
585 ret = kstrtoul(page, 0, &val); \
586 if (ret < 0) { \
587 pr_err("kstrtoul() failed with" \
588 " ret: %d\n", ret); \
589 return -EINVAL; \
590 } \
591 ret = se_dev_set_##_name(da->da_dev, (u32)val); \
592 \
593 return (!ret) ? count : -EINVAL; \
594}
595
596#define DEF_DEV_ATTRIB(_name) \
597DEF_DEV_ATTRIB_SHOW(_name); \
598DEF_DEV_ATTRIB_STORE(_name);
599
600#define DEF_DEV_ATTRIB_RO(_name) \
601DEF_DEV_ATTRIB_SHOW(_name);
602
603CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
604#define SE_DEV_ATTR(_name, _mode) \
605static struct target_core_dev_attrib_attribute \
606 target_core_dev_attrib_##_name = \
607 __CONFIGFS_EATTR(_name, _mode, \
608 target_core_dev_show_attr_##_name, \
609 target_core_dev_store_attr_##_name);
610
611#define SE_DEV_ATTR_RO(_name); \
612static struct target_core_dev_attrib_attribute \
613 target_core_dev_attrib_##_name = \
614 __CONFIGFS_EATTR_RO(_name, \
615 target_core_dev_show_attr_##_name);
616
617DEF_DEV_ATTRIB(emulate_model_alias);
618SE_DEV_ATTR(emulate_model_alias, S_IRUGO | S_IWUSR);
619
620DEF_DEV_ATTRIB(emulate_dpo);
621SE_DEV_ATTR(emulate_dpo, S_IRUGO | S_IWUSR);
622
623DEF_DEV_ATTRIB(emulate_fua_write);
624SE_DEV_ATTR(emulate_fua_write, S_IRUGO | S_IWUSR);
625
626DEF_DEV_ATTRIB(emulate_fua_read);
627SE_DEV_ATTR(emulate_fua_read, S_IRUGO | S_IWUSR);
628
629DEF_DEV_ATTRIB(emulate_write_cache);
630SE_DEV_ATTR(emulate_write_cache, S_IRUGO | S_IWUSR);
631
632DEF_DEV_ATTRIB(emulate_ua_intlck_ctrl);
633SE_DEV_ATTR(emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
634
635DEF_DEV_ATTRIB(emulate_tas);
636SE_DEV_ATTR(emulate_tas, S_IRUGO | S_IWUSR);
637
638DEF_DEV_ATTRIB(emulate_tpu);
639SE_DEV_ATTR(emulate_tpu, S_IRUGO | S_IWUSR);
640
641DEF_DEV_ATTRIB(emulate_tpws);
642SE_DEV_ATTR(emulate_tpws, S_IRUGO | S_IWUSR);
643
644DEF_DEV_ATTRIB(emulate_caw);
645SE_DEV_ATTR(emulate_caw, S_IRUGO | S_IWUSR);
646
647DEF_DEV_ATTRIB(emulate_3pc);
648SE_DEV_ATTR(emulate_3pc, S_IRUGO | S_IWUSR);
649
650DEF_DEV_ATTRIB(pi_prot_type);
651SE_DEV_ATTR(pi_prot_type, S_IRUGO | S_IWUSR);
652
653DEF_DEV_ATTRIB_RO(hw_pi_prot_type);
654SE_DEV_ATTR_RO(hw_pi_prot_type);
655
656DEF_DEV_ATTRIB(pi_prot_format);
657SE_DEV_ATTR(pi_prot_format, S_IRUGO | S_IWUSR);
658
659DEF_DEV_ATTRIB(enforce_pr_isids);
660SE_DEV_ATTR(enforce_pr_isids, S_IRUGO | S_IWUSR);
661
662DEF_DEV_ATTRIB(is_nonrot);
663SE_DEV_ATTR(is_nonrot, S_IRUGO | S_IWUSR);
664
665DEF_DEV_ATTRIB(emulate_rest_reord);
666SE_DEV_ATTR(emulate_rest_reord, S_IRUGO | S_IWUSR);
667
668DEF_DEV_ATTRIB_RO(hw_block_size);
669SE_DEV_ATTR_RO(hw_block_size);
670
671DEF_DEV_ATTRIB(block_size);
672SE_DEV_ATTR(block_size, S_IRUGO | S_IWUSR);
673
674DEF_DEV_ATTRIB_RO(hw_max_sectors);
675SE_DEV_ATTR_RO(hw_max_sectors);
676
677DEF_DEV_ATTRIB(fabric_max_sectors);
678SE_DEV_ATTR(fabric_max_sectors, S_IRUGO | S_IWUSR);
679
680DEF_DEV_ATTRIB(optimal_sectors);
681SE_DEV_ATTR(optimal_sectors, S_IRUGO | S_IWUSR);
682
683DEF_DEV_ATTRIB_RO(hw_queue_depth);
684SE_DEV_ATTR_RO(hw_queue_depth);
685
686DEF_DEV_ATTRIB(queue_depth);
687SE_DEV_ATTR(queue_depth, S_IRUGO | S_IWUSR);
688
689DEF_DEV_ATTRIB(max_unmap_lba_count);
690SE_DEV_ATTR(max_unmap_lba_count, S_IRUGO | S_IWUSR);
691
692DEF_DEV_ATTRIB(max_unmap_block_desc_count);
693SE_DEV_ATTR(max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
694
695DEF_DEV_ATTRIB(unmap_granularity);
696SE_DEV_ATTR(unmap_granularity, S_IRUGO | S_IWUSR);
697
698DEF_DEV_ATTRIB(unmap_granularity_alignment);
699SE_DEV_ATTR(unmap_granularity_alignment, S_IRUGO | S_IWUSR);
700
701DEF_DEV_ATTRIB(max_write_same_len);
702SE_DEV_ATTR(max_write_same_len, S_IRUGO | S_IWUSR);
703
704CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
705
706static struct configfs_attribute *target_core_dev_attrib_attrs[] = {
707 &target_core_dev_attrib_emulate_model_alias.attr,
708 &target_core_dev_attrib_emulate_dpo.attr,
709 &target_core_dev_attrib_emulate_fua_write.attr,
710 &target_core_dev_attrib_emulate_fua_read.attr,
711 &target_core_dev_attrib_emulate_write_cache.attr,
712 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
713 &target_core_dev_attrib_emulate_tas.attr,
714 &target_core_dev_attrib_emulate_tpu.attr,
715 &target_core_dev_attrib_emulate_tpws.attr,
716 &target_core_dev_attrib_emulate_caw.attr,
717 &target_core_dev_attrib_emulate_3pc.attr,
718 &target_core_dev_attrib_pi_prot_type.attr,
719 &target_core_dev_attrib_hw_pi_prot_type.attr,
720 &target_core_dev_attrib_pi_prot_format.attr,
721 &target_core_dev_attrib_enforce_pr_isids.attr,
722 &target_core_dev_attrib_is_nonrot.attr,
723 &target_core_dev_attrib_emulate_rest_reord.attr,
724 &target_core_dev_attrib_hw_block_size.attr,
725 &target_core_dev_attrib_block_size.attr,
726 &target_core_dev_attrib_hw_max_sectors.attr,
727 &target_core_dev_attrib_fabric_max_sectors.attr,
728 &target_core_dev_attrib_optimal_sectors.attr,
729 &target_core_dev_attrib_hw_queue_depth.attr,
730 &target_core_dev_attrib_queue_depth.attr,
731 &target_core_dev_attrib_max_unmap_lba_count.attr,
732 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
733 &target_core_dev_attrib_unmap_granularity.attr,
734 &target_core_dev_attrib_unmap_granularity_alignment.attr,
735 &target_core_dev_attrib_max_write_same_len.attr,
736 NULL,
737};
738
739static struct configfs_item_operations target_core_dev_attrib_ops = {
740 .show_attribute = target_core_dev_attrib_attr_show,
741 .store_attribute = target_core_dev_attrib_attr_store,
742};
743
744static struct config_item_type target_core_dev_attrib_cit = {
745 .ct_item_ops = &target_core_dev_attrib_ops,
746 .ct_attrs = target_core_dev_attrib_attrs,
747 .ct_owner = THIS_MODULE,
748};
749
750/* End functions for struct config_item_type target_core_dev_attrib_cit */
751
752/* Start functions for struct config_item_type target_core_dev_wwn_cit */
753
754CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
755#define SE_DEV_WWN_ATTR(_name, _mode) \
756static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
757 __CONFIGFS_EATTR(_name, _mode, \
758 target_core_dev_wwn_show_attr_##_name, \
759 target_core_dev_wwn_store_attr_##_name);
760
761#define SE_DEV_WWN_ATTR_RO(_name); \
762do { \
763 static struct target_core_dev_wwn_attribute \
764 target_core_dev_wwn_##_name = \
765 __CONFIGFS_EATTR_RO(_name, \
766 target_core_dev_wwn_show_attr_##_name); \
767} while (0);
768
769/*
770 * VPD page 0x80 Unit serial
771 */
772static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
773 struct t10_wwn *t10_wwn,
774 char *page)
775{
776 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
777 &t10_wwn->unit_serial[0]);
778}
779
780static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
781 struct t10_wwn *t10_wwn,
782 const char *page,
783 size_t count)
784{
785 struct se_device *dev = t10_wwn->t10_dev;
786 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
787
788 /*
789 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
790 * from the struct scsi_device level firmware, do not allow
791 * VPD Unit Serial to be emulated.
792 *
793 * Note this struct scsi_device could also be emulating VPD
794 * information from its drivers/scsi LLD. But for now we assume
795 * it is doing 'the right thing' wrt a world wide unique
796 * VPD Unit Serial Number that OS dependent multipath can depend on.
797 */
798 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
799 pr_err("Underlying SCSI device firmware provided VPD"
800 " Unit Serial, ignoring request\n");
801 return -EOPNOTSUPP;
802 }
803
804 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
805 pr_err("Emulated VPD Unit Serial exceeds"
806 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
807 return -EOVERFLOW;
808 }
809 /*
810 * Check to see if any active $FABRIC_MOD exports exist. If they
811 * do exist, fail here as changing this information on the fly
812 * (underneath the initiator side OS dependent multipath code)
813 * could cause negative effects.
814 */
815 if (dev->export_count) {
816 pr_err("Unable to set VPD Unit Serial while"
817 " active %d $FABRIC_MOD exports exist\n",
818 dev->export_count);
819 return -EINVAL;
820 }
821
822 /*
823 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
824 *
825 * Also, strip any newline added from the userspace
826 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
827 */
828 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
829 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
830 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
831 "%s", strstrip(buf));
832 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
833
834 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
835 " %s\n", dev->t10_wwn.unit_serial);
836
837 return count;
838}
839
840SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
841
842/*
843 * VPD page 0x83 Protocol Identifier
844 */
845static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
846 struct t10_wwn *t10_wwn,
847 char *page)
848{
849 struct t10_vpd *vpd;
850 unsigned char buf[VPD_TMP_BUF_SIZE];
851 ssize_t len = 0;
852
853 memset(buf, 0, VPD_TMP_BUF_SIZE);
854
855 spin_lock(&t10_wwn->t10_vpd_lock);
856 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
857 if (!vpd->protocol_identifier_set)
858 continue;
859
860 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
861
862 if (len + strlen(buf) >= PAGE_SIZE)
863 break;
864
865 len += sprintf(page+len, "%s", buf);
866 }
867 spin_unlock(&t10_wwn->t10_vpd_lock);
868
869 return len;
870}
871
872static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
873 struct t10_wwn *t10_wwn,
874 const char *page,
875 size_t count)
876{
877 return -ENOSYS;
878}
879
880SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
881
882/*
883 * Generic wrapper for dumping VPD identifiers by association.
884 */
885#define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
886static ssize_t target_core_dev_wwn_show_attr_##_name( \
887 struct t10_wwn *t10_wwn, \
888 char *page) \
889{ \
890 struct t10_vpd *vpd; \
891 unsigned char buf[VPD_TMP_BUF_SIZE]; \
892 ssize_t len = 0; \
893 \
894 spin_lock(&t10_wwn->t10_vpd_lock); \
895 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
896 if (vpd->association != _assoc) \
897 continue; \
898 \
899 memset(buf, 0, VPD_TMP_BUF_SIZE); \
900 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
901 if (len + strlen(buf) >= PAGE_SIZE) \
902 break; \
903 len += sprintf(page+len, "%s", buf); \
904 \
905 memset(buf, 0, VPD_TMP_BUF_SIZE); \
906 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
907 if (len + strlen(buf) >= PAGE_SIZE) \
908 break; \
909 len += sprintf(page+len, "%s", buf); \
910 \
911 memset(buf, 0, VPD_TMP_BUF_SIZE); \
912 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
913 if (len + strlen(buf) >= PAGE_SIZE) \
914 break; \
915 len += sprintf(page+len, "%s", buf); \
916 } \
917 spin_unlock(&t10_wwn->t10_vpd_lock); \
918 \
919 return len; \
920}
921
922/*
923 * VPD page 0x83 Association: Logical Unit
924 */
925DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
926
927static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
928 struct t10_wwn *t10_wwn,
929 const char *page,
930 size_t count)
931{
932 return -ENOSYS;
933}
934
935SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
936
937/*
938 * VPD page 0x83 Association: Target Port
939 */
940DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
941
942static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
943 struct t10_wwn *t10_wwn,
944 const char *page,
945 size_t count)
946{
947 return -ENOSYS;
948}
949
950SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
951
952/*
953 * VPD page 0x83 Association: SCSI Target Device
954 */
955DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
956
957static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
958 struct t10_wwn *t10_wwn,
959 const char *page,
960 size_t count)
961{
962 return -ENOSYS;
963}
964
965SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
966
967CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
968
969static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
970 &target_core_dev_wwn_vpd_unit_serial.attr,
971 &target_core_dev_wwn_vpd_protocol_identifier.attr,
972 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
973 &target_core_dev_wwn_vpd_assoc_target_port.attr,
974 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
975 NULL,
976};
977
978static struct configfs_item_operations target_core_dev_wwn_ops = {
979 .show_attribute = target_core_dev_wwn_attr_show,
980 .store_attribute = target_core_dev_wwn_attr_store,
981};
982
983static struct config_item_type target_core_dev_wwn_cit = {
984 .ct_item_ops = &target_core_dev_wwn_ops,
985 .ct_attrs = target_core_dev_wwn_attrs,
986 .ct_owner = THIS_MODULE,
987};
988
989/* End functions for struct config_item_type target_core_dev_wwn_cit */
990
991/* Start functions for struct config_item_type target_core_dev_pr_cit */
992
993CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
994#define SE_DEV_PR_ATTR(_name, _mode) \
995static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
996 __CONFIGFS_EATTR(_name, _mode, \
997 target_core_dev_pr_show_attr_##_name, \
998 target_core_dev_pr_store_attr_##_name);
999
1000#define SE_DEV_PR_ATTR_RO(_name); \
1001static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1002 __CONFIGFS_EATTR_RO(_name, \
1003 target_core_dev_pr_show_attr_##_name);
1004
1005static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1006 char *page)
1007{
1008 struct se_node_acl *se_nacl;
1009 struct t10_pr_registration *pr_reg;
1010 char i_buf[PR_REG_ISID_ID_LEN];
1011
1012 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1013
1014 pr_reg = dev->dev_pr_res_holder;
1015 if (!pr_reg)
1016 return sprintf(page, "No SPC-3 Reservation holder\n");
1017
1018 se_nacl = pr_reg->pr_reg_nacl;
1019 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1020
1021 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1022 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1023 se_nacl->initiatorname, i_buf);
1024}
1025
1026static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1027 char *page)
1028{
1029 struct se_node_acl *se_nacl;
1030 ssize_t len;
1031
1032 se_nacl = dev->dev_reserved_node_acl;
1033 if (se_nacl) {
1034 len = sprintf(page,
1035 "SPC-2 Reservation: %s Initiator: %s\n",
1036 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1037 se_nacl->initiatorname);
1038 } else {
1039 len = sprintf(page, "No SPC-2 Reservation holder\n");
1040 }
1041 return len;
1042}
1043
1044static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1045 char *page)
1046{
1047 int ret;
1048
1049 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1050 return sprintf(page, "Passthrough\n");
1051
1052 spin_lock(&dev->dev_reservation_lock);
1053 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1054 ret = target_core_dev_pr_show_spc2_res(dev, page);
1055 else
1056 ret = target_core_dev_pr_show_spc3_res(dev, page);
1057 spin_unlock(&dev->dev_reservation_lock);
1058 return ret;
1059}
1060
1061SE_DEV_PR_ATTR_RO(res_holder);
1062
1063static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1064 struct se_device *dev, char *page)
1065{
1066 ssize_t len = 0;
1067
1068 spin_lock(&dev->dev_reservation_lock);
1069 if (!dev->dev_pr_res_holder) {
1070 len = sprintf(page, "No SPC-3 Reservation holder\n");
1071 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1072 len = sprintf(page, "SPC-3 Reservation: All Target"
1073 " Ports registration\n");
1074 } else {
1075 len = sprintf(page, "SPC-3 Reservation: Single"
1076 " Target Port registration\n");
1077 }
1078
1079 spin_unlock(&dev->dev_reservation_lock);
1080 return len;
1081}
1082
1083SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1084
1085static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1086 struct se_device *dev, char *page)
1087{
1088 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1089}
1090
1091SE_DEV_PR_ATTR_RO(res_pr_generation);
1092
1093/*
1094 * res_pr_holder_tg_port
1095 */
1096static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1097 struct se_device *dev, char *page)
1098{
1099 struct se_node_acl *se_nacl;
1100 struct se_lun *lun;
1101 struct se_portal_group *se_tpg;
1102 struct t10_pr_registration *pr_reg;
1103 struct target_core_fabric_ops *tfo;
1104 ssize_t len = 0;
1105
1106 spin_lock(&dev->dev_reservation_lock);
1107 pr_reg = dev->dev_pr_res_holder;
1108 if (!pr_reg) {
1109 len = sprintf(page, "No SPC-3 Reservation holder\n");
1110 goto out_unlock;
1111 }
1112
1113 se_nacl = pr_reg->pr_reg_nacl;
1114 se_tpg = se_nacl->se_tpg;
1115 lun = pr_reg->pr_reg_tg_pt_lun;
1116 tfo = se_tpg->se_tpg_tfo;
1117
1118 len += sprintf(page+len, "SPC-3 Reservation: %s"
1119 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1120 tfo->tpg_get_wwn(se_tpg));
1121 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1122 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1123 " %s Logical Unit: %u\n", lun->lun_sep->sep_rtpi,
1124 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1125 tfo->get_fabric_name(), lun->unpacked_lun);
1126
1127out_unlock:
1128 spin_unlock(&dev->dev_reservation_lock);
1129 return len;
1130}
1131
1132SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1133
1134static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1135 struct se_device *dev, char *page)
1136{
1137 struct target_core_fabric_ops *tfo;
1138 struct t10_pr_registration *pr_reg;
1139 unsigned char buf[384];
1140 char i_buf[PR_REG_ISID_ID_LEN];
1141 ssize_t len = 0;
1142 int reg_count = 0;
1143
1144 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1145
1146 spin_lock(&dev->t10_pr.registration_lock);
1147 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1148 pr_reg_list) {
1149
1150 memset(buf, 0, 384);
1151 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1152 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1153 core_pr_dump_initiator_port(pr_reg, i_buf,
1154 PR_REG_ISID_ID_LEN);
1155 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1156 tfo->get_fabric_name(),
1157 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1158 pr_reg->pr_res_generation);
1159
1160 if (len + strlen(buf) >= PAGE_SIZE)
1161 break;
1162
1163 len += sprintf(page+len, "%s", buf);
1164 reg_count++;
1165 }
1166 spin_unlock(&dev->t10_pr.registration_lock);
1167
1168 if (!reg_count)
1169 len += sprintf(page+len, "None\n");
1170
1171 return len;
1172}
1173
1174SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1175
1176static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1177 struct se_device *dev, char *page)
1178{
1179 struct t10_pr_registration *pr_reg;
1180 ssize_t len = 0;
1181
1182 spin_lock(&dev->dev_reservation_lock);
1183 pr_reg = dev->dev_pr_res_holder;
1184 if (pr_reg) {
1185 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1186 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1187 } else {
1188 len = sprintf(page, "No SPC-3 Reservation holder\n");
1189 }
1190
1191 spin_unlock(&dev->dev_reservation_lock);
1192 return len;
1193}
1194
1195SE_DEV_PR_ATTR_RO(res_pr_type);
1196
1197static ssize_t target_core_dev_pr_show_attr_res_type(
1198 struct se_device *dev, char *page)
1199{
1200 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1201 return sprintf(page, "SPC_PASSTHROUGH\n");
1202 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1203 return sprintf(page, "SPC2_RESERVATIONS\n");
1204 else
1205 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1206}
1207
1208SE_DEV_PR_ATTR_RO(res_type);
1209
1210static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1211 struct se_device *dev, char *page)
1212{
1213 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1214 return 0;
1215
1216 return sprintf(page, "APTPL Bit Status: %s\n",
1217 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1218}
1219
1220SE_DEV_PR_ATTR_RO(res_aptpl_active);
1221
1222/*
1223 * res_aptpl_metadata
1224 */
1225static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1226 struct se_device *dev, char *page)
1227{
1228 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1229 return 0;
1230
1231 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1232}
1233
1234enum {
1235 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1236 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1237 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1238 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1239};
1240
1241static match_table_t tokens = {
1242 {Opt_initiator_fabric, "initiator_fabric=%s"},
1243 {Opt_initiator_node, "initiator_node=%s"},
1244 {Opt_initiator_sid, "initiator_sid=%s"},
1245 {Opt_sa_res_key, "sa_res_key=%s"},
1246 {Opt_res_holder, "res_holder=%d"},
1247 {Opt_res_type, "res_type=%d"},
1248 {Opt_res_scope, "res_scope=%d"},
1249 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1250 {Opt_mapped_lun, "mapped_lun=%d"},
1251 {Opt_target_fabric, "target_fabric=%s"},
1252 {Opt_target_node, "target_node=%s"},
1253 {Opt_tpgt, "tpgt=%d"},
1254 {Opt_port_rtpi, "port_rtpi=%d"},
1255 {Opt_target_lun, "target_lun=%d"},
1256 {Opt_err, NULL}
1257};
1258
1259static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1260 struct se_device *dev,
1261 const char *page,
1262 size_t count)
1263{
1264 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1265 unsigned char *t_fabric = NULL, *t_port = NULL;
1266 char *orig, *ptr, *arg_p, *opts;
1267 substring_t args[MAX_OPT_ARGS];
1268 unsigned long long tmp_ll;
1269 u64 sa_res_key = 0;
1270 u32 mapped_lun = 0, target_lun = 0;
1271 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1272 u16 port_rpti = 0, tpgt = 0;
1273 u8 type = 0, scope;
1274
1275 if (dev->transport->transport_type == TRANSPORT_PLUGIN_PHBA_PDEV)
1276 return 0;
1277 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1278 return 0;
1279
1280 if (dev->export_count) {
1281 pr_debug("Unable to process APTPL metadata while"
1282 " active fabric exports exist\n");
1283 return -EINVAL;
1284 }
1285
1286 opts = kstrdup(page, GFP_KERNEL);
1287 if (!opts)
1288 return -ENOMEM;
1289
1290 orig = opts;
1291 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1292 if (!*ptr)
1293 continue;
1294
1295 token = match_token(ptr, tokens, args);
1296 switch (token) {
1297 case Opt_initiator_fabric:
1298 i_fabric = match_strdup(&args[0]);
1299 if (!i_fabric) {
1300 ret = -ENOMEM;
1301 goto out;
1302 }
1303 break;
1304 case Opt_initiator_node:
1305 i_port = match_strdup(&args[0]);
1306 if (!i_port) {
1307 ret = -ENOMEM;
1308 goto out;
1309 }
1310 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1311 pr_err("APTPL metadata initiator_node="
1312 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1313 PR_APTPL_MAX_IPORT_LEN);
1314 ret = -EINVAL;
1315 break;
1316 }
1317 break;
1318 case Opt_initiator_sid:
1319 isid = match_strdup(&args[0]);
1320 if (!isid) {
1321 ret = -ENOMEM;
1322 goto out;
1323 }
1324 if (strlen(isid) >= PR_REG_ISID_LEN) {
1325 pr_err("APTPL metadata initiator_isid"
1326 "= exceeds PR_REG_ISID_LEN: %d\n",
1327 PR_REG_ISID_LEN);
1328 ret = -EINVAL;
1329 break;
1330 }
1331 break;
1332 case Opt_sa_res_key:
1333 arg_p = match_strdup(&args[0]);
1334 if (!arg_p) {
1335 ret = -ENOMEM;
1336 goto out;
1337 }
1338 ret = kstrtoull(arg_p, 0, &tmp_ll);
1339 if (ret < 0) {
1340 pr_err("kstrtoull() failed for"
1341 " sa_res_key=\n");
1342 goto out;
1343 }
1344 sa_res_key = (u64)tmp_ll;
1345 break;
1346 /*
1347 * PR APTPL Metadata for Reservation
1348 */
1349 case Opt_res_holder:
1350 match_int(args, &arg);
1351 res_holder = arg;
1352 break;
1353 case Opt_res_type:
1354 match_int(args, &arg);
1355 type = (u8)arg;
1356 break;
1357 case Opt_res_scope:
1358 match_int(args, &arg);
1359 scope = (u8)arg;
1360 break;
1361 case Opt_res_all_tg_pt:
1362 match_int(args, &arg);
1363 all_tg_pt = (int)arg;
1364 break;
1365 case Opt_mapped_lun:
1366 match_int(args, &arg);
1367 mapped_lun = (u32)arg;
1368 break;
1369 /*
1370 * PR APTPL Metadata for Target Port
1371 */
1372 case Opt_target_fabric:
1373 t_fabric = match_strdup(&args[0]);
1374 if (!t_fabric) {
1375 ret = -ENOMEM;
1376 goto out;
1377 }
1378 break;
1379 case Opt_target_node:
1380 t_port = match_strdup(&args[0]);
1381 if (!t_port) {
1382 ret = -ENOMEM;
1383 goto out;
1384 }
1385 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1386 pr_err("APTPL metadata target_node="
1387 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1388 PR_APTPL_MAX_TPORT_LEN);
1389 ret = -EINVAL;
1390 break;
1391 }
1392 break;
1393 case Opt_tpgt:
1394 match_int(args, &arg);
1395 tpgt = (u16)arg;
1396 break;
1397 case Opt_port_rtpi:
1398 match_int(args, &arg);
1399 port_rpti = (u16)arg;
1400 break;
1401 case Opt_target_lun:
1402 match_int(args, &arg);
1403 target_lun = (u32)arg;
1404 break;
1405 default:
1406 break;
1407 }
1408 }
1409
1410 if (!i_port || !t_port || !sa_res_key) {
1411 pr_err("Illegal parameters for APTPL registration\n");
1412 ret = -EINVAL;
1413 goto out;
1414 }
1415
1416 if (res_holder && !(type)) {
1417 pr_err("Illegal PR type: 0x%02x for reservation"
1418 " holder\n", type);
1419 ret = -EINVAL;
1420 goto out;
1421 }
1422
1423 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1424 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1425 res_holder, all_tg_pt, type);
1426out:
1427 kfree(i_fabric);
1428 kfree(i_port);
1429 kfree(isid);
1430 kfree(t_fabric);
1431 kfree(t_port);
1432 kfree(orig);
1433 return (ret == 0) ? count : ret;
1434}
1435
1436SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1437
1438CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1439
1440static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1441 &target_core_dev_pr_res_holder.attr,
1442 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1443 &target_core_dev_pr_res_pr_generation.attr,
1444 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1445 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1446 &target_core_dev_pr_res_pr_type.attr,
1447 &target_core_dev_pr_res_type.attr,
1448 &target_core_dev_pr_res_aptpl_active.attr,
1449 &target_core_dev_pr_res_aptpl_metadata.attr,
1450 NULL,
1451};
1452
1453static struct configfs_item_operations target_core_dev_pr_ops = {
1454 .show_attribute = target_core_dev_pr_attr_show,
1455 .store_attribute = target_core_dev_pr_attr_store,
1456};
1457
1458static struct config_item_type target_core_dev_pr_cit = {
1459 .ct_item_ops = &target_core_dev_pr_ops,
1460 .ct_attrs = target_core_dev_pr_attrs,
1461 .ct_owner = THIS_MODULE,
1462};
1463
1464/* End functions for struct config_item_type target_core_dev_pr_cit */
1465
1466/* Start functions for struct config_item_type target_core_dev_cit */
1467
1468static ssize_t target_core_show_dev_info(void *p, char *page)
1469{
1470 struct se_device *dev = p;
1471 struct se_subsystem_api *t = dev->transport;
1472 int bl = 0;
1473 ssize_t read_bytes = 0;
1474
1475 transport_dump_dev_state(dev, page, &bl);
1476 read_bytes += bl;
1477 read_bytes += t->show_configfs_dev_params(dev, page+read_bytes);
1478 return read_bytes;
1479}
1480
1481static struct target_core_configfs_attribute target_core_attr_dev_info = {
1482 .attr = { .ca_owner = THIS_MODULE,
1483 .ca_name = "info",
1484 .ca_mode = S_IRUGO },
1485 .show = target_core_show_dev_info,
1486 .store = NULL,
1487};
1488
1489static ssize_t target_core_store_dev_control(
1490 void *p,
1491 const char *page,
1492 size_t count)
1493{
1494 struct se_device *dev = p;
1495 struct se_subsystem_api *t = dev->transport;
1496
1497 return t->set_configfs_dev_params(dev, page, count);
1498}
1499
1500static struct target_core_configfs_attribute target_core_attr_dev_control = {
1501 .attr = { .ca_owner = THIS_MODULE,
1502 .ca_name = "control",
1503 .ca_mode = S_IWUSR },
1504 .show = NULL,
1505 .store = target_core_store_dev_control,
1506};
1507
1508static ssize_t target_core_show_dev_alias(void *p, char *page)
1509{
1510 struct se_device *dev = p;
1511
1512 if (!(dev->dev_flags & DF_USING_ALIAS))
1513 return 0;
1514
1515 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1516}
1517
1518static ssize_t target_core_store_dev_alias(
1519 void *p,
1520 const char *page,
1521 size_t count)
1522{
1523 struct se_device *dev = p;
1524 struct se_hba *hba = dev->se_hba;
1525 ssize_t read_bytes;
1526
1527 if (count > (SE_DEV_ALIAS_LEN-1)) {
1528 pr_err("alias count: %d exceeds"
1529 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1530 SE_DEV_ALIAS_LEN-1);
1531 return -EINVAL;
1532 }
1533
1534 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1535 if (!read_bytes)
1536 return -EINVAL;
1537 if (dev->dev_alias[read_bytes - 1] == '\n')
1538 dev->dev_alias[read_bytes - 1] = '\0';
1539
1540 dev->dev_flags |= DF_USING_ALIAS;
1541
1542 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1543 config_item_name(&hba->hba_group.cg_item),
1544 config_item_name(&dev->dev_group.cg_item),
1545 dev->dev_alias);
1546
1547 return read_bytes;
1548}
1549
1550static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1551 .attr = { .ca_owner = THIS_MODULE,
1552 .ca_name = "alias",
1553 .ca_mode = S_IRUGO | S_IWUSR },
1554 .show = target_core_show_dev_alias,
1555 .store = target_core_store_dev_alias,
1556};
1557
1558static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1559{
1560 struct se_device *dev = p;
1561
1562 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1563 return 0;
1564
1565 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1566}
1567
1568static ssize_t target_core_store_dev_udev_path(
1569 void *p,
1570 const char *page,
1571 size_t count)
1572{
1573 struct se_device *dev = p;
1574 struct se_hba *hba = dev->se_hba;
1575 ssize_t read_bytes;
1576
1577 if (count > (SE_UDEV_PATH_LEN-1)) {
1578 pr_err("udev_path count: %d exceeds"
1579 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1580 SE_UDEV_PATH_LEN-1);
1581 return -EINVAL;
1582 }
1583
1584 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1585 "%s", page);
1586 if (!read_bytes)
1587 return -EINVAL;
1588 if (dev->udev_path[read_bytes - 1] == '\n')
1589 dev->udev_path[read_bytes - 1] = '\0';
1590
1591 dev->dev_flags |= DF_USING_UDEV_PATH;
1592
1593 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1594 config_item_name(&hba->hba_group.cg_item),
1595 config_item_name(&dev->dev_group.cg_item),
1596 dev->udev_path);
1597
1598 return read_bytes;
1599}
1600
1601static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1602 .attr = { .ca_owner = THIS_MODULE,
1603 .ca_name = "udev_path",
1604 .ca_mode = S_IRUGO | S_IWUSR },
1605 .show = target_core_show_dev_udev_path,
1606 .store = target_core_store_dev_udev_path,
1607};
1608
1609static ssize_t target_core_show_dev_enable(void *p, char *page)
1610{
1611 struct se_device *dev = p;
1612
1613 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1614}
1615
1616static ssize_t target_core_store_dev_enable(
1617 void *p,
1618 const char *page,
1619 size_t count)
1620{
1621 struct se_device *dev = p;
1622 char *ptr;
1623 int ret;
1624
1625 ptr = strstr(page, "1");
1626 if (!ptr) {
1627 pr_err("For dev_enable ops, only valid value"
1628 " is \"1\"\n");
1629 return -EINVAL;
1630 }
1631
1632 ret = target_configure_device(dev);
1633 if (ret)
1634 return ret;
1635 return count;
1636}
1637
1638static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1639 .attr = { .ca_owner = THIS_MODULE,
1640 .ca_name = "enable",
1641 .ca_mode = S_IRUGO | S_IWUSR },
1642 .show = target_core_show_dev_enable,
1643 .store = target_core_store_dev_enable,
1644};
1645
1646static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1647{
1648 struct se_device *dev = p;
1649 struct config_item *lu_ci;
1650 struct t10_alua_lu_gp *lu_gp;
1651 struct t10_alua_lu_gp_member *lu_gp_mem;
1652 ssize_t len = 0;
1653
1654 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1655 if (!lu_gp_mem)
1656 return 0;
1657
1658 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1659 lu_gp = lu_gp_mem->lu_gp;
1660 if (lu_gp) {
1661 lu_ci = &lu_gp->lu_gp_group.cg_item;
1662 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1663 config_item_name(lu_ci), lu_gp->lu_gp_id);
1664 }
1665 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1666
1667 return len;
1668}
1669
1670static ssize_t target_core_store_alua_lu_gp(
1671 void *p,
1672 const char *page,
1673 size_t count)
1674{
1675 struct se_device *dev = p;
1676 struct se_hba *hba = dev->se_hba;
1677 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1678 struct t10_alua_lu_gp_member *lu_gp_mem;
1679 unsigned char buf[LU_GROUP_NAME_BUF];
1680 int move = 0;
1681
1682 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1683 if (!lu_gp_mem)
1684 return 0;
1685
1686 if (count > LU_GROUP_NAME_BUF) {
1687 pr_err("ALUA LU Group Alias too large!\n");
1688 return -EINVAL;
1689 }
1690 memset(buf, 0, LU_GROUP_NAME_BUF);
1691 memcpy(buf, page, count);
1692 /*
1693 * Any ALUA logical unit alias besides "NULL" means we will be
1694 * making a new group association.
1695 */
1696 if (strcmp(strstrip(buf), "NULL")) {
1697 /*
1698 * core_alua_get_lu_gp_by_name() will increment reference to
1699 * struct t10_alua_lu_gp. This reference is released with
1700 * core_alua_get_lu_gp_by_name below().
1701 */
1702 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1703 if (!lu_gp_new)
1704 return -ENODEV;
1705 }
1706
1707 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1708 lu_gp = lu_gp_mem->lu_gp;
1709 if (lu_gp) {
1710 /*
1711 * Clearing an existing lu_gp association, and replacing
1712 * with NULL
1713 */
1714 if (!lu_gp_new) {
1715 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1716 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1717 " %hu\n",
1718 config_item_name(&hba->hba_group.cg_item),
1719 config_item_name(&dev->dev_group.cg_item),
1720 config_item_name(&lu_gp->lu_gp_group.cg_item),
1721 lu_gp->lu_gp_id);
1722
1723 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1724 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1725
1726 return count;
1727 }
1728 /*
1729 * Removing existing association of lu_gp_mem with lu_gp
1730 */
1731 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1732 move = 1;
1733 }
1734 /*
1735 * Associate lu_gp_mem with lu_gp_new.
1736 */
1737 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1738 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1739
1740 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1741 " core/alua/lu_gps/%s, ID: %hu\n",
1742 (move) ? "Moving" : "Adding",
1743 config_item_name(&hba->hba_group.cg_item),
1744 config_item_name(&dev->dev_group.cg_item),
1745 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1746 lu_gp_new->lu_gp_id);
1747
1748 core_alua_put_lu_gp_from_name(lu_gp_new);
1749 return count;
1750}
1751
1752static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
1753 .attr = { .ca_owner = THIS_MODULE,
1754 .ca_name = "alua_lu_gp",
1755 .ca_mode = S_IRUGO | S_IWUSR },
1756 .show = target_core_show_alua_lu_gp,
1757 .store = target_core_store_alua_lu_gp,
1758};
1759
1760static ssize_t target_core_show_dev_lba_map(void *p, char *page)
1761{
1762 struct se_device *dev = p;
1763 struct t10_alua_lba_map *map;
1764 struct t10_alua_lba_map_member *mem;
1765 char *b = page;
1766 int bl = 0;
1767 char state;
1768
1769 spin_lock(&dev->t10_alua.lba_map_lock);
1770 if (!list_empty(&dev->t10_alua.lba_map_list))
1771 bl += sprintf(b + bl, "%u %u\n",
1772 dev->t10_alua.lba_map_segment_size,
1773 dev->t10_alua.lba_map_segment_multiplier);
1774 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1775 bl += sprintf(b + bl, "%llu %llu",
1776 map->lba_map_first_lba, map->lba_map_last_lba);
1777 list_for_each_entry(mem, &map->lba_map_mem_list,
1778 lba_map_mem_list) {
1779 switch (mem->lba_map_mem_alua_state) {
1780 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1781 state = 'O';
1782 break;
1783 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1784 state = 'A';
1785 break;
1786 case ALUA_ACCESS_STATE_STANDBY:
1787 state = 'S';
1788 break;
1789 case ALUA_ACCESS_STATE_UNAVAILABLE:
1790 state = 'U';
1791 break;
1792 default:
1793 state = '.';
1794 break;
1795 }
1796 bl += sprintf(b + bl, " %d:%c",
1797 mem->lba_map_mem_alua_pg_id, state);
1798 }
1799 bl += sprintf(b + bl, "\n");
1800 }
1801 spin_unlock(&dev->t10_alua.lba_map_lock);
1802 return bl;
1803}
1804
1805static ssize_t target_core_store_dev_lba_map(
1806 void *p,
1807 const char *page,
1808 size_t count)
1809{
1810 struct se_device *dev = p;
1811 struct t10_alua_lba_map *lba_map = NULL;
1812 struct list_head lba_list;
1813 char *map_entries, *ptr;
1814 char state;
1815 int pg_num = -1, pg;
1816 int ret = 0, num = 0, pg_id, alua_state;
1817 unsigned long start_lba = -1, end_lba = -1;
1818 unsigned long segment_size = -1, segment_mult = -1;
1819
1820 map_entries = kstrdup(page, GFP_KERNEL);
1821 if (!map_entries)
1822 return -ENOMEM;
1823
1824 INIT_LIST_HEAD(&lba_list);
1825 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
1826 if (!*ptr)
1827 continue;
1828
1829 if (num == 0) {
1830 if (sscanf(ptr, "%lu %lu\n",
1831 &segment_size, &segment_mult) != 2) {
1832 pr_err("Invalid line %d\n", num);
1833 ret = -EINVAL;
1834 break;
1835 }
1836 num++;
1837 continue;
1838 }
1839 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
1840 pr_err("Invalid line %d\n", num);
1841 ret = -EINVAL;
1842 break;
1843 }
1844 ptr = strchr(ptr, ' ');
1845 if (!ptr) {
1846 pr_err("Invalid line %d, missing end lba\n", num);
1847 ret = -EINVAL;
1848 break;
1849 }
1850 ptr++;
1851 ptr = strchr(ptr, ' ');
1852 if (!ptr) {
1853 pr_err("Invalid line %d, missing state definitions\n",
1854 num);
1855 ret = -EINVAL;
1856 break;
1857 }
1858 ptr++;
1859 lba_map = core_alua_allocate_lba_map(&lba_list,
1860 start_lba, end_lba);
1861 if (IS_ERR(lba_map)) {
1862 ret = PTR_ERR(lba_map);
1863 break;
1864 }
1865 pg = 0;
1866 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
1867 switch (state) {
1868 case 'O':
1869 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
1870 break;
1871 case 'A':
1872 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
1873 break;
1874 case 'S':
1875 alua_state = ALUA_ACCESS_STATE_STANDBY;
1876 break;
1877 case 'U':
1878 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
1879 break;
1880 default:
1881 pr_err("Invalid ALUA state '%c'\n", state);
1882 ret = -EINVAL;
1883 goto out;
1884 }
1885
1886 ret = core_alua_allocate_lba_map_mem(lba_map,
1887 pg_id, alua_state);
1888 if (ret) {
1889 pr_err("Invalid target descriptor %d:%c "
1890 "at line %d\n",
1891 pg_id, state, num);
1892 break;
1893 }
1894 pg++;
1895 ptr = strchr(ptr, ' ');
1896 if (ptr)
1897 ptr++;
1898 else
1899 break;
1900 }
1901 if (pg_num == -1)
1902 pg_num = pg;
1903 else if (pg != pg_num) {
1904 pr_err("Only %d from %d port groups definitions "
1905 "at line %d\n", pg, pg_num, num);
1906 ret = -EINVAL;
1907 break;
1908 }
1909 num++;
1910 }
1911out:
1912 if (ret) {
1913 core_alua_free_lba_map(&lba_list);
1914 count = ret;
1915 } else
1916 core_alua_set_lba_map(dev, &lba_list,
1917 segment_size, segment_mult);
1918 kfree(map_entries);
1919 return count;
1920}
1921
1922static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
1923 .attr = { .ca_owner = THIS_MODULE,
1924 .ca_name = "lba_map",
1925 .ca_mode = S_IRUGO | S_IWUSR },
1926 .show = target_core_show_dev_lba_map,
1927 .store = target_core_store_dev_lba_map,
1928};
1929
1930static struct configfs_attribute *lio_core_dev_attrs[] = {
1931 &target_core_attr_dev_info.attr,
1932 &target_core_attr_dev_control.attr,
1933 &target_core_attr_dev_alias.attr,
1934 &target_core_attr_dev_udev_path.attr,
1935 &target_core_attr_dev_enable.attr,
1936 &target_core_attr_dev_alua_lu_gp.attr,
1937 &target_core_attr_dev_lba_map.attr,
1938 NULL,
1939};
1940
1941static void target_core_dev_release(struct config_item *item)
1942{
1943 struct config_group *dev_cg = to_config_group(item);
1944 struct se_device *dev =
1945 container_of(dev_cg, struct se_device, dev_group);
1946
1947 kfree(dev_cg->default_groups);
1948 target_free_device(dev);
1949}
1950
1951static ssize_t target_core_dev_show(struct config_item *item,
1952 struct configfs_attribute *attr,
1953 char *page)
1954{
1955 struct config_group *dev_cg = to_config_group(item);
1956 struct se_device *dev =
1957 container_of(dev_cg, struct se_device, dev_group);
1958 struct target_core_configfs_attribute *tc_attr = container_of(
1959 attr, struct target_core_configfs_attribute, attr);
1960
1961 if (!tc_attr->show)
1962 return -EINVAL;
1963
1964 return tc_attr->show(dev, page);
1965}
1966
1967static ssize_t target_core_dev_store(struct config_item *item,
1968 struct configfs_attribute *attr,
1969 const char *page, size_t count)
1970{
1971 struct config_group *dev_cg = to_config_group(item);
1972 struct se_device *dev =
1973 container_of(dev_cg, struct se_device, dev_group);
1974 struct target_core_configfs_attribute *tc_attr = container_of(
1975 attr, struct target_core_configfs_attribute, attr);
1976
1977 if (!tc_attr->store)
1978 return -EINVAL;
1979
1980 return tc_attr->store(dev, page, count);
1981}
1982
1983static struct configfs_item_operations target_core_dev_item_ops = {
1984 .release = target_core_dev_release,
1985 .show_attribute = target_core_dev_show,
1986 .store_attribute = target_core_dev_store,
1987};
1988
1989static struct config_item_type target_core_dev_cit = {
1990 .ct_item_ops = &target_core_dev_item_ops,
1991 .ct_attrs = lio_core_dev_attrs,
1992 .ct_owner = THIS_MODULE,
1993};
1994
1995/* End functions for struct config_item_type target_core_dev_cit */
1996
1997/* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
1998
1999CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2000#define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2001static struct target_core_alua_lu_gp_attribute \
2002 target_core_alua_lu_gp_##_name = \
2003 __CONFIGFS_EATTR(_name, _mode, \
2004 target_core_alua_lu_gp_show_attr_##_name, \
2005 target_core_alua_lu_gp_store_attr_##_name);
2006
2007#define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2008static struct target_core_alua_lu_gp_attribute \
2009 target_core_alua_lu_gp_##_name = \
2010 __CONFIGFS_EATTR_RO(_name, \
2011 target_core_alua_lu_gp_show_attr_##_name);
2012
2013/*
2014 * lu_gp_id
2015 */
2016static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2017 struct t10_alua_lu_gp *lu_gp,
2018 char *page)
2019{
2020 if (!lu_gp->lu_gp_valid_id)
2021 return 0;
2022
2023 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2024}
2025
2026static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2027 struct t10_alua_lu_gp *lu_gp,
2028 const char *page,
2029 size_t count)
2030{
2031 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2032 unsigned long lu_gp_id;
2033 int ret;
2034
2035 ret = kstrtoul(page, 0, &lu_gp_id);
2036 if (ret < 0) {
2037 pr_err("kstrtoul() returned %d for"
2038 " lu_gp_id\n", ret);
2039 return ret;
2040 }
2041 if (lu_gp_id > 0x0000ffff) {
2042 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2043 " 0x0000ffff\n", lu_gp_id);
2044 return -EINVAL;
2045 }
2046
2047 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2048 if (ret < 0)
2049 return -EINVAL;
2050
2051 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2052 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2053 config_item_name(&alua_lu_gp_cg->cg_item),
2054 lu_gp->lu_gp_id);
2055
2056 return count;
2057}
2058
2059SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2060
2061/*
2062 * members
2063 */
2064static ssize_t target_core_alua_lu_gp_show_attr_members(
2065 struct t10_alua_lu_gp *lu_gp,
2066 char *page)
2067{
2068 struct se_device *dev;
2069 struct se_hba *hba;
2070 struct t10_alua_lu_gp_member *lu_gp_mem;
2071 ssize_t len = 0, cur_len;
2072 unsigned char buf[LU_GROUP_NAME_BUF];
2073
2074 memset(buf, 0, LU_GROUP_NAME_BUF);
2075
2076 spin_lock(&lu_gp->lu_gp_lock);
2077 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2078 dev = lu_gp_mem->lu_gp_mem_dev;
2079 hba = dev->se_hba;
2080
2081 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2082 config_item_name(&hba->hba_group.cg_item),
2083 config_item_name(&dev->dev_group.cg_item));
2084 cur_len++; /* Extra byte for NULL terminator */
2085
2086 if ((cur_len + len) > PAGE_SIZE) {
2087 pr_warn("Ran out of lu_gp_show_attr"
2088 "_members buffer\n");
2089 break;
2090 }
2091 memcpy(page+len, buf, cur_len);
2092 len += cur_len;
2093 }
2094 spin_unlock(&lu_gp->lu_gp_lock);
2095
2096 return len;
2097}
2098
2099SE_DEV_ALUA_LU_ATTR_RO(members);
2100
2101CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2102
2103static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2104 &target_core_alua_lu_gp_lu_gp_id.attr,
2105 &target_core_alua_lu_gp_members.attr,
2106 NULL,
2107};
2108
2109static void target_core_alua_lu_gp_release(struct config_item *item)
2110{
2111 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2112 struct t10_alua_lu_gp, lu_gp_group);
2113
2114 core_alua_free_lu_gp(lu_gp);
2115}
2116
2117static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2118 .release = target_core_alua_lu_gp_release,
2119 .show_attribute = target_core_alua_lu_gp_attr_show,
2120 .store_attribute = target_core_alua_lu_gp_attr_store,
2121};
2122
2123static struct config_item_type target_core_alua_lu_gp_cit = {
2124 .ct_item_ops = &target_core_alua_lu_gp_ops,
2125 .ct_attrs = target_core_alua_lu_gp_attrs,
2126 .ct_owner = THIS_MODULE,
2127};
2128
2129/* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2130
2131/* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2132
2133static struct config_group *target_core_alua_create_lu_gp(
2134 struct config_group *group,
2135 const char *name)
2136{
2137 struct t10_alua_lu_gp *lu_gp;
2138 struct config_group *alua_lu_gp_cg = NULL;
2139 struct config_item *alua_lu_gp_ci = NULL;
2140
2141 lu_gp = core_alua_allocate_lu_gp(name, 0);
2142 if (IS_ERR(lu_gp))
2143 return NULL;
2144
2145 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2146 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2147
2148 config_group_init_type_name(alua_lu_gp_cg, name,
2149 &target_core_alua_lu_gp_cit);
2150
2151 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2152 " Group: core/alua/lu_gps/%s\n",
2153 config_item_name(alua_lu_gp_ci));
2154
2155 return alua_lu_gp_cg;
2156
2157}
2158
2159static void target_core_alua_drop_lu_gp(
2160 struct config_group *group,
2161 struct config_item *item)
2162{
2163 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2164 struct t10_alua_lu_gp, lu_gp_group);
2165
2166 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2167 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2168 config_item_name(item), lu_gp->lu_gp_id);
2169 /*
2170 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2171 * -> target_core_alua_lu_gp_release()
2172 */
2173 config_item_put(item);
2174}
2175
2176static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2177 .make_group = &target_core_alua_create_lu_gp,
2178 .drop_item = &target_core_alua_drop_lu_gp,
2179};
2180
2181static struct config_item_type target_core_alua_lu_gps_cit = {
2182 .ct_item_ops = NULL,
2183 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2184 .ct_owner = THIS_MODULE,
2185};
2186
2187/* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2188
2189/* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2190
2191CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2192#define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2193static struct target_core_alua_tg_pt_gp_attribute \
2194 target_core_alua_tg_pt_gp_##_name = \
2195 __CONFIGFS_EATTR(_name, _mode, \
2196 target_core_alua_tg_pt_gp_show_attr_##_name, \
2197 target_core_alua_tg_pt_gp_store_attr_##_name);
2198
2199#define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2200static struct target_core_alua_tg_pt_gp_attribute \
2201 target_core_alua_tg_pt_gp_##_name = \
2202 __CONFIGFS_EATTR_RO(_name, \
2203 target_core_alua_tg_pt_gp_show_attr_##_name);
2204
2205/*
2206 * alua_access_state
2207 */
2208static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2209 struct t10_alua_tg_pt_gp *tg_pt_gp,
2210 char *page)
2211{
2212 return sprintf(page, "%d\n",
2213 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2214}
2215
2216static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2217 struct t10_alua_tg_pt_gp *tg_pt_gp,
2218 const char *page,
2219 size_t count)
2220{
2221 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2222 unsigned long tmp;
2223 int new_state, ret;
2224
2225 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2226 pr_err("Unable to do implicit ALUA on non valid"
2227 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2228 return -EINVAL;
2229 }
2230 if (!(dev->dev_flags & DF_CONFIGURED)) {
2231 pr_err("Unable to set alua_access_state while device is"
2232 " not configured\n");
2233 return -ENODEV;
2234 }
2235
2236 ret = kstrtoul(page, 0, &tmp);
2237 if (ret < 0) {
2238 pr_err("Unable to extract new ALUA access state from"
2239 " %s\n", page);
2240 return ret;
2241 }
2242 new_state = (int)tmp;
2243
2244 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2245 pr_err("Unable to process implicit configfs ALUA"
2246 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2247 return -EINVAL;
2248 }
2249 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2250 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2251 /* LBA DEPENDENT is only allowed with implicit ALUA */
2252 pr_err("Unable to process implicit configfs ALUA transition"
2253 " while explicit ALUA management is enabled\n");
2254 return -EINVAL;
2255 }
2256
2257 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2258 NULL, NULL, new_state, 0);
2259 return (!ret) ? count : -EINVAL;
2260}
2261
2262SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2263
2264/*
2265 * alua_access_status
2266 */
2267static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2268 struct t10_alua_tg_pt_gp *tg_pt_gp,
2269 char *page)
2270{
2271 return sprintf(page, "%s\n",
2272 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2273}
2274
2275static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2276 struct t10_alua_tg_pt_gp *tg_pt_gp,
2277 const char *page,
2278 size_t count)
2279{
2280 unsigned long tmp;
2281 int new_status, ret;
2282
2283 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2284 pr_err("Unable to do set ALUA access status on non"
2285 " valid tg_pt_gp ID: %hu\n",
2286 tg_pt_gp->tg_pt_gp_valid_id);
2287 return -EINVAL;
2288 }
2289
2290 ret = kstrtoul(page, 0, &tmp);
2291 if (ret < 0) {
2292 pr_err("Unable to extract new ALUA access status"
2293 " from %s\n", page);
2294 return ret;
2295 }
2296 new_status = (int)tmp;
2297
2298 if ((new_status != ALUA_STATUS_NONE) &&
2299 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2300 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2301 pr_err("Illegal ALUA access status: 0x%02x\n",
2302 new_status);
2303 return -EINVAL;
2304 }
2305
2306 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2307 return count;
2308}
2309
2310SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2311
2312/*
2313 * alua_access_type
2314 */
2315static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2316 struct t10_alua_tg_pt_gp *tg_pt_gp,
2317 char *page)
2318{
2319 return core_alua_show_access_type(tg_pt_gp, page);
2320}
2321
2322static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2323 struct t10_alua_tg_pt_gp *tg_pt_gp,
2324 const char *page,
2325 size_t count)
2326{
2327 return core_alua_store_access_type(tg_pt_gp, page, count);
2328}
2329
2330SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2331
2332/*
2333 * alua_supported_states
2334 */
2335
2336#define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2337static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2338 struct t10_alua_tg_pt_gp *t, char *p) \
2339{ \
2340 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2341}
2342
2343#define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2344static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2345 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2346{ \
2347 unsigned long tmp; \
2348 int ret; \
2349 \
2350 if (!t->tg_pt_gp_valid_id) { \
2351 pr_err("Unable to do set ##_name ALUA state on non" \
2352 " valid tg_pt_gp ID: %hu\n", \
2353 t->tg_pt_gp_valid_id); \
2354 return -EINVAL; \
2355 } \
2356 \
2357 ret = kstrtoul(p, 0, &tmp); \
2358 if (ret < 0) { \
2359 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2360 return -EINVAL; \
2361 } \
2362 if (tmp > 1) { \
2363 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2364 return -EINVAL; \
2365 } \
2366 if (!tmp) \
2367 t->_var |= _bit; \
2368 else \
2369 t->_var &= ~_bit; \
2370 \
2371 return c; \
2372}
2373
2374SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2375 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2376SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2377 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2378SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2379
2380SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2381 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2382SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2383 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2384SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2385
2386SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2387 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2388SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2389 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2390SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2391
2392SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2393 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2394SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2395 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2396SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2397
2398SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2399 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2400SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2401 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2402SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2403
2404SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2405 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2406SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2407 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2408SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2409
2410SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2411 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2412SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2413 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2414SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2415
2416/*
2417 * alua_write_metadata
2418 */
2419static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2420 struct t10_alua_tg_pt_gp *tg_pt_gp,
2421 char *page)
2422{
2423 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2424}
2425
2426static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2427 struct t10_alua_tg_pt_gp *tg_pt_gp,
2428 const char *page,
2429 size_t count)
2430{
2431 unsigned long tmp;
2432 int ret;
2433
2434 ret = kstrtoul(page, 0, &tmp);
2435 if (ret < 0) {
2436 pr_err("Unable to extract alua_write_metadata\n");
2437 return ret;
2438 }
2439
2440 if ((tmp != 0) && (tmp != 1)) {
2441 pr_err("Illegal value for alua_write_metadata:"
2442 " %lu\n", tmp);
2443 return -EINVAL;
2444 }
2445 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2446
2447 return count;
2448}
2449
2450SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2451
2452
2453
2454/*
2455 * nonop_delay_msecs
2456 */
2457static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2458 struct t10_alua_tg_pt_gp *tg_pt_gp,
2459 char *page)
2460{
2461 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2462
2463}
2464
2465static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2466 struct t10_alua_tg_pt_gp *tg_pt_gp,
2467 const char *page,
2468 size_t count)
2469{
2470 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2471}
2472
2473SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2474
2475/*
2476 * trans_delay_msecs
2477 */
2478static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2479 struct t10_alua_tg_pt_gp *tg_pt_gp,
2480 char *page)
2481{
2482 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2483}
2484
2485static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2486 struct t10_alua_tg_pt_gp *tg_pt_gp,
2487 const char *page,
2488 size_t count)
2489{
2490 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2491}
2492
2493SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2494
2495/*
2496 * implicit_trans_secs
2497 */
2498static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2499 struct t10_alua_tg_pt_gp *tg_pt_gp,
2500 char *page)
2501{
2502 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2503}
2504
2505static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2506 struct t10_alua_tg_pt_gp *tg_pt_gp,
2507 const char *page,
2508 size_t count)
2509{
2510 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2511}
2512
2513SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2514
2515/*
2516 * preferred
2517 */
2518
2519static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2520 struct t10_alua_tg_pt_gp *tg_pt_gp,
2521 char *page)
2522{
2523 return core_alua_show_preferred_bit(tg_pt_gp, page);
2524}
2525
2526static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2527 struct t10_alua_tg_pt_gp *tg_pt_gp,
2528 const char *page,
2529 size_t count)
2530{
2531 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2532}
2533
2534SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2535
2536/*
2537 * tg_pt_gp_id
2538 */
2539static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2540 struct t10_alua_tg_pt_gp *tg_pt_gp,
2541 char *page)
2542{
2543 if (!tg_pt_gp->tg_pt_gp_valid_id)
2544 return 0;
2545
2546 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2547}
2548
2549static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2550 struct t10_alua_tg_pt_gp *tg_pt_gp,
2551 const char *page,
2552 size_t count)
2553{
2554 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2555 unsigned long tg_pt_gp_id;
2556 int ret;
2557
2558 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2559 if (ret < 0) {
2560 pr_err("kstrtoul() returned %d for"
2561 " tg_pt_gp_id\n", ret);
2562 return ret;
2563 }
2564 if (tg_pt_gp_id > 0x0000ffff) {
2565 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2566 " 0x0000ffff\n", tg_pt_gp_id);
2567 return -EINVAL;
2568 }
2569
2570 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2571 if (ret < 0)
2572 return -EINVAL;
2573
2574 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2575 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2576 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2577 tg_pt_gp->tg_pt_gp_id);
2578
2579 return count;
2580}
2581
2582SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2583
2584/*
2585 * members
2586 */
2587static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2588 struct t10_alua_tg_pt_gp *tg_pt_gp,
2589 char *page)
2590{
2591 struct se_port *port;
2592 struct se_portal_group *tpg;
2593 struct se_lun *lun;
2594 struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem;
2595 ssize_t len = 0, cur_len;
2596 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2597
2598 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2599
2600 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2601 list_for_each_entry(tg_pt_gp_mem, &tg_pt_gp->tg_pt_gp_mem_list,
2602 tg_pt_gp_mem_list) {
2603 port = tg_pt_gp_mem->tg_pt;
2604 tpg = port->sep_tpg;
2605 lun = port->sep_lun;
2606
2607 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2608 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2609 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2610 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2611 config_item_name(&lun->lun_group.cg_item));
2612 cur_len++; /* Extra byte for NULL terminator */
2613
2614 if ((cur_len + len) > PAGE_SIZE) {
2615 pr_warn("Ran out of lu_gp_show_attr"
2616 "_members buffer\n");
2617 break;
2618 }
2619 memcpy(page+len, buf, cur_len);
2620 len += cur_len;
2621 }
2622 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2623
2624 return len;
2625}
2626
2627SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2628
2629CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2630 tg_pt_gp_group);
2631
2632static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2633 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2634 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2635 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2636 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2637 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2638 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2639 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2640 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2641 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2642 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2643 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2644 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2645 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2646 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2647 &target_core_alua_tg_pt_gp_preferred.attr,
2648 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2649 &target_core_alua_tg_pt_gp_members.attr,
2650 NULL,
2651};
2652
2653static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2654{
2655 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2656 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2657
2658 core_alua_free_tg_pt_gp(tg_pt_gp);
2659}
2660
2661static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2662 .release = target_core_alua_tg_pt_gp_release,
2663 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2664 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2665};
2666
2667static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2668 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2669 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2670 .ct_owner = THIS_MODULE,
2671};
2672
2673/* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2674
2675/* Start functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2676
2677static struct config_group *target_core_alua_create_tg_pt_gp(
2678 struct config_group *group,
2679 const char *name)
2680{
2681 struct t10_alua *alua = container_of(group, struct t10_alua,
2682 alua_tg_pt_gps_group);
2683 struct t10_alua_tg_pt_gp *tg_pt_gp;
2684 struct config_group *alua_tg_pt_gp_cg = NULL;
2685 struct config_item *alua_tg_pt_gp_ci = NULL;
2686
2687 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2688 if (!tg_pt_gp)
2689 return NULL;
2690
2691 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2692 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2693
2694 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2695 &target_core_alua_tg_pt_gp_cit);
2696
2697 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2698 " Group: alua/tg_pt_gps/%s\n",
2699 config_item_name(alua_tg_pt_gp_ci));
2700
2701 return alua_tg_pt_gp_cg;
2702}
2703
2704static void target_core_alua_drop_tg_pt_gp(
2705 struct config_group *group,
2706 struct config_item *item)
2707{
2708 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2709 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2710
2711 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2712 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2713 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2714 /*
2715 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2716 * -> target_core_alua_tg_pt_gp_release().
2717 */
2718 config_item_put(item);
2719}
2720
2721static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2722 .make_group = &target_core_alua_create_tg_pt_gp,
2723 .drop_item = &target_core_alua_drop_tg_pt_gp,
2724};
2725
2726static struct config_item_type target_core_alua_tg_pt_gps_cit = {
2727 .ct_group_ops = &target_core_alua_tg_pt_gps_group_ops,
2728 .ct_owner = THIS_MODULE,
2729};
2730
2731/* End functions for struct config_item_type target_core_alua_tg_pt_gps_cit */
2732
2733/* Start functions for struct config_item_type target_core_alua_cit */
2734
2735/*
2736 * target_core_alua_cit is a ConfigFS group that lives under
2737 * /sys/kernel/config/target/core/alua. There are default groups
2738 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2739 * target_core_alua_cit in target_core_init_configfs() below.
2740 */
2741static struct config_item_type target_core_alua_cit = {
2742 .ct_item_ops = NULL,
2743 .ct_attrs = NULL,
2744 .ct_owner = THIS_MODULE,
2745};
2746
2747/* End functions for struct config_item_type target_core_alua_cit */
2748
2749/* Start functions for struct config_item_type target_core_stat_cit */
2750
2751static struct config_group *target_core_stat_mkdir(
2752 struct config_group *group,
2753 const char *name)
2754{
2755 return ERR_PTR(-ENOSYS);
2756}
2757
2758static void target_core_stat_rmdir(
2759 struct config_group *group,
2760 struct config_item *item)
2761{
2762 return;
2763}
2764
2765static struct configfs_group_operations target_core_stat_group_ops = {
2766 .make_group = &target_core_stat_mkdir,
2767 .drop_item = &target_core_stat_rmdir,
2768};
2769
2770static struct config_item_type target_core_stat_cit = {
2771 .ct_group_ops = &target_core_stat_group_ops,
2772 .ct_owner = THIS_MODULE,
2773};
2774
2775/* End functions for struct config_item_type target_core_stat_cit */
2776
2777/* Start functions for struct config_item_type target_core_hba_cit */
2778
2779static struct config_group *target_core_make_subdev(
2780 struct config_group *group,
2781 const char *name)
2782{
2783 struct t10_alua_tg_pt_gp *tg_pt_gp;
2784 struct se_subsystem_api *t;
2785 struct config_item *hba_ci = &group->cg_item;
2786 struct se_hba *hba = item_to_hba(hba_ci);
2787 struct se_device *dev;
2788 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2789 struct config_group *dev_stat_grp = NULL;
2790 int errno = -ENOMEM, ret;
2791
2792 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2793 if (ret)
2794 return ERR_PTR(ret);
2795 /*
2796 * Locate the struct se_subsystem_api from parent's struct se_hba.
2797 */
2798 t = hba->transport;
2799
2800 dev = target_alloc_device(hba, name);
2801 if (!dev)
2802 goto out_unlock;
2803
2804 dev_cg = &dev->dev_group;
2805
2806 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2807 GFP_KERNEL);
2808 if (!dev_cg->default_groups)
2809 goto out_free_device;
2810
2811 config_group_init_type_name(dev_cg, name, &target_core_dev_cit);
2812 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2813 &target_core_dev_attrib_cit);
2814 config_group_init_type_name(&dev->dev_pr_group, "pr",
2815 &target_core_dev_pr_cit);
2816 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2817 &target_core_dev_wwn_cit);
2818 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2819 "alua", &target_core_alua_tg_pt_gps_cit);
2820 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2821 "statistics", &target_core_stat_cit);
2822
2823 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2824 dev_cg->default_groups[1] = &dev->dev_pr_group;
2825 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2826 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2827 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2828 dev_cg->default_groups[5] = NULL;
2829 /*
2830 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2831 */
2832 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2833 if (!tg_pt_gp)
2834 goto out_free_dev_cg_default_groups;
2835 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2836
2837 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2838 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2839 GFP_KERNEL);
2840 if (!tg_pt_gp_cg->default_groups) {
2841 pr_err("Unable to allocate tg_pt_gp_cg->"
2842 "default_groups\n");
2843 goto out_free_tg_pt_gp;
2844 }
2845
2846 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2847 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2848 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2849 tg_pt_gp_cg->default_groups[1] = NULL;
2850 /*
2851 * Add core/$HBA/$DEV/statistics/ default groups
2852 */
2853 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2854 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2855 GFP_KERNEL);
2856 if (!dev_stat_grp->default_groups) {
2857 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2858 goto out_free_tg_pt_gp_cg_default_groups;
2859 }
2860 target_stat_setup_dev_default_groups(dev);
2861
2862 mutex_unlock(&hba->hba_access_mutex);
2863 return dev_cg;
2864
2865out_free_tg_pt_gp_cg_default_groups:
2866 kfree(tg_pt_gp_cg->default_groups);
2867out_free_tg_pt_gp:
2868 core_alua_free_tg_pt_gp(tg_pt_gp);
2869out_free_dev_cg_default_groups:
2870 kfree(dev_cg->default_groups);
2871out_free_device:
2872 target_free_device(dev);
2873out_unlock:
2874 mutex_unlock(&hba->hba_access_mutex);
2875 return ERR_PTR(errno);
2876}
2877
2878static void target_core_drop_subdev(
2879 struct config_group *group,
2880 struct config_item *item)
2881{
2882 struct config_group *dev_cg = to_config_group(item);
2883 struct se_device *dev =
2884 container_of(dev_cg, struct se_device, dev_group);
2885 struct se_hba *hba;
2886 struct config_item *df_item;
2887 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2888 int i;
2889
2890 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2891
2892 mutex_lock(&hba->hba_access_mutex);
2893
2894 dev_stat_grp = &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 = &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 dev->t10_alua.default_tg_pt_gp = NULL;
2914
2915 for (i = 0; dev_cg->default_groups[i]; i++) {
2916 df_item = &dev_cg->default_groups[i]->cg_item;
2917 dev_cg->default_groups[i] = NULL;
2918 config_item_put(df_item);
2919 }
2920 /*
2921 * se_dev is released from target_core_dev_item_ops->release()
2922 */
2923 config_item_put(item);
2924 mutex_unlock(&hba->hba_access_mutex);
2925}
2926
2927static struct configfs_group_operations target_core_hba_group_ops = {
2928 .make_group = target_core_make_subdev,
2929 .drop_item = target_core_drop_subdev,
2930};
2931
2932CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
2933#define SE_HBA_ATTR(_name, _mode) \
2934static struct target_core_hba_attribute \
2935 target_core_hba_##_name = \
2936 __CONFIGFS_EATTR(_name, _mode, \
2937 target_core_hba_show_attr_##_name, \
2938 target_core_hba_store_attr_##_name);
2939
2940#define SE_HBA_ATTR_RO(_name) \
2941static struct target_core_hba_attribute \
2942 target_core_hba_##_name = \
2943 __CONFIGFS_EATTR_RO(_name, \
2944 target_core_hba_show_attr_##_name);
2945
2946static ssize_t target_core_hba_show_attr_hba_info(
2947 struct se_hba *hba,
2948 char *page)
2949{
2950 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2951 hba->hba_id, hba->transport->name,
2952 TARGET_CORE_CONFIGFS_VERSION);
2953}
2954
2955SE_HBA_ATTR_RO(hba_info);
2956
2957static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
2958 char *page)
2959{
2960 int hba_mode = 0;
2961
2962 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2963 hba_mode = 1;
2964
2965 return sprintf(page, "%d\n", hba_mode);
2966}
2967
2968static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
2969 const char *page, size_t count)
2970{
2971 struct se_subsystem_api *transport = hba->transport;
2972 unsigned long mode_flag;
2973 int ret;
2974
2975 if (transport->pmode_enable_hba == NULL)
2976 return -EINVAL;
2977
2978 ret = kstrtoul(page, 0, &mode_flag);
2979 if (ret < 0) {
2980 pr_err("Unable to extract hba mode flag: %d\n", ret);
2981 return ret;
2982 }
2983
2984 if (hba->dev_count) {
2985 pr_err("Unable to set hba_mode with active devices\n");
2986 return -EINVAL;
2987 }
2988
2989 ret = transport->pmode_enable_hba(hba, mode_flag);
2990 if (ret < 0)
2991 return -EINVAL;
2992 if (ret > 0)
2993 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2994 else if (ret == 0)
2995 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2996
2997 return count;
2998}
2999
3000SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3001
3002CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3003
3004static void target_core_hba_release(struct config_item *item)
3005{
3006 struct se_hba *hba = container_of(to_config_group(item),
3007 struct se_hba, hba_group);
3008 core_delete_hba(hba);
3009}
3010
3011static struct configfs_attribute *target_core_hba_attrs[] = {
3012 &target_core_hba_hba_info.attr,
3013 &target_core_hba_hba_mode.attr,
3014 NULL,
3015};
3016
3017static struct configfs_item_operations target_core_hba_item_ops = {
3018 .release = target_core_hba_release,
3019 .show_attribute = target_core_hba_attr_show,
3020 .store_attribute = target_core_hba_attr_store,
3021};
3022
3023static struct config_item_type target_core_hba_cit = {
3024 .ct_item_ops = &target_core_hba_item_ops,
3025 .ct_group_ops = &target_core_hba_group_ops,
3026 .ct_attrs = target_core_hba_attrs,
3027 .ct_owner = THIS_MODULE,
3028};
3029
3030static struct config_group *target_core_call_addhbatotarget(
3031 struct config_group *group,
3032 const char *name)
3033{
3034 char *se_plugin_str, *str, *str2;
3035 struct se_hba *hba;
3036 char buf[TARGET_CORE_NAME_MAX_LEN];
3037 unsigned long plugin_dep_id = 0;
3038 int ret;
3039
3040 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3041 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3042 pr_err("Passed *name strlen(): %d exceeds"
3043 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3044 TARGET_CORE_NAME_MAX_LEN);
3045 return ERR_PTR(-ENAMETOOLONG);
3046 }
3047 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3048
3049 str = strstr(buf, "_");
3050 if (!str) {
3051 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3052 return ERR_PTR(-EINVAL);
3053 }
3054 se_plugin_str = buf;
3055 /*
3056 * Special case for subsystem plugins that have "_" in their names.
3057 * Namely rd_direct and rd_mcp..
3058 */
3059 str2 = strstr(str+1, "_");
3060 if (str2) {
3061 *str2 = '\0'; /* Terminate for *se_plugin_str */
3062 str2++; /* Skip to start of plugin dependent ID */
3063 str = str2;
3064 } else {
3065 *str = '\0'; /* Terminate for *se_plugin_str */
3066 str++; /* Skip to start of plugin dependent ID */
3067 }
3068
3069 ret = kstrtoul(str, 0, &plugin_dep_id);
3070 if (ret < 0) {
3071 pr_err("kstrtoul() returned %d for"
3072 " plugin_dep_id\n", ret);
3073 return ERR_PTR(ret);
3074 }
3075 /*
3076 * Load up TCM subsystem plugins if they have not already been loaded.
3077 */
3078 transport_subsystem_check_init();
3079
3080 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3081 if (IS_ERR(hba))
3082 return ERR_CAST(hba);
3083
3084 config_group_init_type_name(&hba->hba_group, name,
3085 &target_core_hba_cit);
3086
3087 return &hba->hba_group;
3088}
3089
3090static void target_core_call_delhbafromtarget(
3091 struct config_group *group,
3092 struct config_item *item)
3093{
3094 /*
3095 * core_delete_hba() is called from target_core_hba_item_ops->release()
3096 * -> target_core_hba_release()
3097 */
3098 config_item_put(item);
3099}
3100
3101static struct configfs_group_operations target_core_group_ops = {
3102 .make_group = target_core_call_addhbatotarget,
3103 .drop_item = target_core_call_delhbafromtarget,
3104};
3105
3106static struct config_item_type target_core_cit = {
3107 .ct_item_ops = NULL,
3108 .ct_group_ops = &target_core_group_ops,
3109 .ct_attrs = NULL,
3110 .ct_owner = THIS_MODULE,
3111};
3112
3113/* Stop functions for struct config_item_type target_core_hba_cit */
3114
3115static int __init target_core_init_configfs(void)
3116{
3117 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3118 struct config_group *lu_gp_cg = NULL;
3119 struct configfs_subsystem *subsys;
3120 struct t10_alua_lu_gp *lu_gp;
3121 int ret;
3122
3123 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3124 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3125 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3126
3127 subsys = target_core_subsystem[0];
3128 config_group_init(&subsys->su_group);
3129 mutex_init(&subsys->su_mutex);
3130
3131 ret = init_se_kmem_caches();
3132 if (ret < 0)
3133 return ret;
3134 /*
3135 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3136 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3137 */
3138 target_cg = &subsys->su_group;
3139 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3140 GFP_KERNEL);
3141 if (!target_cg->default_groups) {
3142 pr_err("Unable to allocate target_cg->default_groups\n");
3143 ret = -ENOMEM;
3144 goto out_global;
3145 }
3146
3147 config_group_init_type_name(&target_core_hbagroup,
3148 "core", &target_core_cit);
3149 target_cg->default_groups[0] = &target_core_hbagroup;
3150 target_cg->default_groups[1] = NULL;
3151 /*
3152 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3153 */
3154 hba_cg = &target_core_hbagroup;
3155 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3156 GFP_KERNEL);
3157 if (!hba_cg->default_groups) {
3158 pr_err("Unable to allocate hba_cg->default_groups\n");
3159 ret = -ENOMEM;
3160 goto out_global;
3161 }
3162 config_group_init_type_name(&alua_group,
3163 "alua", &target_core_alua_cit);
3164 hba_cg->default_groups[0] = &alua_group;
3165 hba_cg->default_groups[1] = NULL;
3166 /*
3167 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3168 * groups under /sys/kernel/config/target/core/alua/
3169 */
3170 alua_cg = &alua_group;
3171 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3172 GFP_KERNEL);
3173 if (!alua_cg->default_groups) {
3174 pr_err("Unable to allocate alua_cg->default_groups\n");
3175 ret = -ENOMEM;
3176 goto out_global;
3177 }
3178
3179 config_group_init_type_name(&alua_lu_gps_group,
3180 "lu_gps", &target_core_alua_lu_gps_cit);
3181 alua_cg->default_groups[0] = &alua_lu_gps_group;
3182 alua_cg->default_groups[1] = NULL;
3183 /*
3184 * Add core/alua/lu_gps/default_lu_gp
3185 */
3186 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3187 if (IS_ERR(lu_gp)) {
3188 ret = -ENOMEM;
3189 goto out_global;
3190 }
3191
3192 lu_gp_cg = &alua_lu_gps_group;
3193 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3194 GFP_KERNEL);
3195 if (!lu_gp_cg->default_groups) {
3196 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3197 ret = -ENOMEM;
3198 goto out_global;
3199 }
3200
3201 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3202 &target_core_alua_lu_gp_cit);
3203 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3204 lu_gp_cg->default_groups[1] = NULL;
3205 default_lu_gp = lu_gp;
3206 /*
3207 * Register the target_core_mod subsystem with configfs.
3208 */
3209 ret = configfs_register_subsystem(subsys);
3210 if (ret < 0) {
3211 pr_err("Error %d while registering subsystem %s\n",
3212 ret, subsys->su_group.cg_item.ci_namebuf);
3213 goto out_global;
3214 }
3215 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3216 " Infrastructure: "TARGET_CORE_CONFIGFS_VERSION" on %s/%s"
3217 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3218 /*
3219 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3220 */
3221 ret = rd_module_init();
3222 if (ret < 0)
3223 goto out;
3224
3225 ret = core_dev_setup_virtual_lun0();
3226 if (ret < 0)
3227 goto out;
3228
3229 ret = target_xcopy_setup_pt();
3230 if (ret < 0)
3231 goto out;
3232
3233 return 0;
3234
3235out:
3236 configfs_unregister_subsystem(subsys);
3237 core_dev_release_virtual_lun0();
3238 rd_module_exit();
3239out_global:
3240 if (default_lu_gp) {
3241 core_alua_free_lu_gp(default_lu_gp);
3242 default_lu_gp = NULL;
3243 }
3244 if (lu_gp_cg)
3245 kfree(lu_gp_cg->default_groups);
3246 if (alua_cg)
3247 kfree(alua_cg->default_groups);
3248 if (hba_cg)
3249 kfree(hba_cg->default_groups);
3250 kfree(target_cg->default_groups);
3251 release_se_kmem_caches();
3252 return ret;
3253}
3254
3255static void __exit target_core_exit_configfs(void)
3256{
3257 struct configfs_subsystem *subsys;
3258 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3259 struct config_item *item;
3260 int i;
3261
3262 subsys = target_core_subsystem[0];
3263
3264 lu_gp_cg = &alua_lu_gps_group;
3265 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3266 item = &lu_gp_cg->default_groups[i]->cg_item;
3267 lu_gp_cg->default_groups[i] = NULL;
3268 config_item_put(item);
3269 }
3270 kfree(lu_gp_cg->default_groups);
3271 lu_gp_cg->default_groups = NULL;
3272
3273 alua_cg = &alua_group;
3274 for (i = 0; alua_cg->default_groups[i]; i++) {
3275 item = &alua_cg->default_groups[i]->cg_item;
3276 alua_cg->default_groups[i] = NULL;
3277 config_item_put(item);
3278 }
3279 kfree(alua_cg->default_groups);
3280 alua_cg->default_groups = NULL;
3281
3282 hba_cg = &target_core_hbagroup;
3283 for (i = 0; hba_cg->default_groups[i]; i++) {
3284 item = &hba_cg->default_groups[i]->cg_item;
3285 hba_cg->default_groups[i] = NULL;
3286 config_item_put(item);
3287 }
3288 kfree(hba_cg->default_groups);
3289 hba_cg->default_groups = NULL;
3290 /*
3291 * We expect subsys->su_group.default_groups to be released
3292 * by configfs subsystem provider logic..
3293 */
3294 configfs_unregister_subsystem(subsys);
3295 kfree(subsys->su_group.default_groups);
3296
3297 core_alua_free_lu_gp(default_lu_gp);
3298 default_lu_gp = NULL;
3299
3300 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3301 " Infrastructure\n");
3302
3303 core_dev_release_virtual_lun0();
3304 rd_module_exit();
3305 target_xcopy_release_pt();
3306 release_se_kmem_caches();
3307}
3308
3309MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3310MODULE_AUTHOR("nab@Linux-iSCSI.org");
3311MODULE_LICENSE("GPL");
3312
3313module_init(target_core_init_configfs);
3314module_exit(target_core_exit_configfs);