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Merge tag 'pm+acpi-4.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael...
[deliverable/linux.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43
44 #include "target_core_internal.h"
45 #include "target_core_alua.h"
46 #include "target_core_pr.h"
47 #include "target_core_rd.h"
48 #include "target_core_xcopy.h"
49
50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
52 { \
53 struct config_item_type *cit = &tb->tb_##_name##_cit; \
54 \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = _attrs; \
58 cit->ct_owner = tb->ops->owner; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
60 }
61
62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
64 { \
65 struct config_item_type *cit = &tb->tb_##_name##_cit; \
66 \
67 cit->ct_item_ops = _item_ops; \
68 cit->ct_group_ops = _group_ops; \
69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
70 cit->ct_owner = tb->ops->owner; \
71 pr_debug("Setup generic %s\n", __stringify(_name)); \
72 }
73
74 extern struct t10_alua_lu_gp *default_lu_gp;
75
76 static LIST_HEAD(g_tf_list);
77 static DEFINE_MUTEX(g_tf_lock);
78
79 static struct config_group target_core_hbagroup;
80 static struct config_group alua_group;
81 static struct config_group alua_lu_gps_group;
82
83 static inline struct se_hba *
84 item_to_hba(struct config_item *item)
85 {
86 return container_of(to_config_group(item), struct se_hba, hba_group);
87 }
88
89 /*
90 * Attributes for /sys/kernel/config/target/
91 */
92 static ssize_t target_core_item_version_show(struct config_item *item,
93 char *page)
94 {
95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
97 utsname()->sysname, utsname()->machine);
98 }
99
100 CONFIGFS_ATTR_RO(target_core_item_, version);
101
102 static struct target_fabric_configfs *target_core_get_fabric(
103 const char *name)
104 {
105 struct target_fabric_configfs *tf;
106
107 if (!name)
108 return NULL;
109
110 mutex_lock(&g_tf_lock);
111 list_for_each_entry(tf, &g_tf_list, tf_list) {
112 if (!strcmp(tf->tf_ops->name, name)) {
113 atomic_inc(&tf->tf_access_cnt);
114 mutex_unlock(&g_tf_lock);
115 return tf;
116 }
117 }
118 mutex_unlock(&g_tf_lock);
119
120 return NULL;
121 }
122
123 /*
124 * Called from struct target_core_group_ops->make_group()
125 */
126 static struct config_group *target_core_register_fabric(
127 struct config_group *group,
128 const char *name)
129 {
130 struct target_fabric_configfs *tf;
131 int ret;
132
133 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
134 " %s\n", group, name);
135
136 tf = target_core_get_fabric(name);
137 if (!tf) {
138 pr_debug("target_core_register_fabric() trying autoload for %s\n",
139 name);
140
141 /*
142 * Below are some hardcoded request_module() calls to automatically
143 * local fabric modules when the following is called:
144 *
145 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
146 *
147 * Note that this does not limit which TCM fabric module can be
148 * registered, but simply provids auto loading logic for modules with
149 * mkdir(2) system calls with known TCM fabric modules.
150 */
151
152 if (!strncmp(name, "iscsi", 5)) {
153 /*
154 * Automatically load the LIO Target fabric module when the
155 * following is called:
156 *
157 * mkdir -p $CONFIGFS/target/iscsi
158 */
159 ret = request_module("iscsi_target_mod");
160 if (ret < 0) {
161 pr_debug("request_module() failed for"
162 " iscsi_target_mod.ko: %d\n", ret);
163 return ERR_PTR(-EINVAL);
164 }
165 } else if (!strncmp(name, "loopback", 8)) {
166 /*
167 * Automatically load the tcm_loop fabric module when the
168 * following is called:
169 *
170 * mkdir -p $CONFIGFS/target/loopback
171 */
172 ret = request_module("tcm_loop");
173 if (ret < 0) {
174 pr_debug("request_module() failed for"
175 " tcm_loop.ko: %d\n", ret);
176 return ERR_PTR(-EINVAL);
177 }
178 }
179
180 tf = target_core_get_fabric(name);
181 }
182
183 if (!tf) {
184 pr_debug("target_core_get_fabric() failed for %s\n",
185 name);
186 return ERR_PTR(-EINVAL);
187 }
188 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
189 " %s\n", tf->tf_ops->name);
190 /*
191 * On a successful target_core_get_fabric() look, the returned
192 * struct target_fabric_configfs *tf will contain a usage reference.
193 */
194 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
195 &tf->tf_wwn_cit);
196
197 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
198
199 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
200 &tf->tf_discovery_cit);
201 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
202
203 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
204 " %s\n", tf->tf_group.cg_item.ci_name);
205 return &tf->tf_group;
206 }
207
208 /*
209 * Called from struct target_core_group_ops->drop_item()
210 */
211 static void target_core_deregister_fabric(
212 struct config_group *group,
213 struct config_item *item)
214 {
215 struct target_fabric_configfs *tf = container_of(
216 to_config_group(item), struct target_fabric_configfs, tf_group);
217
218 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
219 " tf list\n", config_item_name(item));
220
221 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
222 " %s\n", tf->tf_ops->name);
223 atomic_dec(&tf->tf_access_cnt);
224
225 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
226 " %s\n", config_item_name(item));
227
228 configfs_remove_default_groups(&tf->tf_group);
229 config_item_put(item);
230 }
231
232 static struct configfs_group_operations target_core_fabric_group_ops = {
233 .make_group = &target_core_register_fabric,
234 .drop_item = &target_core_deregister_fabric,
235 };
236
237 /*
238 * All item attributes appearing in /sys/kernel/target/ appear here.
239 */
240 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
241 &target_core_item_attr_version,
242 NULL,
243 };
244
245 /*
246 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
247 */
248 static struct config_item_type target_core_fabrics_item = {
249 .ct_group_ops = &target_core_fabric_group_ops,
250 .ct_attrs = target_core_fabric_item_attrs,
251 .ct_owner = THIS_MODULE,
252 };
253
254 static struct configfs_subsystem target_core_fabrics = {
255 .su_group = {
256 .cg_item = {
257 .ci_namebuf = "target",
258 .ci_type = &target_core_fabrics_item,
259 },
260 },
261 };
262
263 int target_depend_item(struct config_item *item)
264 {
265 return configfs_depend_item(&target_core_fabrics, item);
266 }
267 EXPORT_SYMBOL(target_depend_item);
268
269 void target_undepend_item(struct config_item *item)
270 {
271 return configfs_undepend_item(item);
272 }
273 EXPORT_SYMBOL(target_undepend_item);
274
275 /*##############################################################################
276 // Start functions called by external Target Fabrics Modules
277 //############################################################################*/
278
279 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
280 {
281 if (!tfo->name) {
282 pr_err("Missing tfo->name\n");
283 return -EINVAL;
284 }
285 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
286 pr_err("Passed name: %s exceeds TARGET_FABRIC"
287 "_NAME_SIZE\n", tfo->name);
288 return -EINVAL;
289 }
290 if (!tfo->get_fabric_name) {
291 pr_err("Missing tfo->get_fabric_name()\n");
292 return -EINVAL;
293 }
294 if (!tfo->tpg_get_wwn) {
295 pr_err("Missing tfo->tpg_get_wwn()\n");
296 return -EINVAL;
297 }
298 if (!tfo->tpg_get_tag) {
299 pr_err("Missing tfo->tpg_get_tag()\n");
300 return -EINVAL;
301 }
302 if (!tfo->tpg_check_demo_mode) {
303 pr_err("Missing tfo->tpg_check_demo_mode()\n");
304 return -EINVAL;
305 }
306 if (!tfo->tpg_check_demo_mode_cache) {
307 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
308 return -EINVAL;
309 }
310 if (!tfo->tpg_check_demo_mode_write_protect) {
311 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
312 return -EINVAL;
313 }
314 if (!tfo->tpg_check_prod_mode_write_protect) {
315 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
316 return -EINVAL;
317 }
318 if (!tfo->tpg_get_inst_index) {
319 pr_err("Missing tfo->tpg_get_inst_index()\n");
320 return -EINVAL;
321 }
322 if (!tfo->release_cmd) {
323 pr_err("Missing tfo->release_cmd()\n");
324 return -EINVAL;
325 }
326 if (!tfo->shutdown_session) {
327 pr_err("Missing tfo->shutdown_session()\n");
328 return -EINVAL;
329 }
330 if (!tfo->close_session) {
331 pr_err("Missing tfo->close_session()\n");
332 return -EINVAL;
333 }
334 if (!tfo->sess_get_index) {
335 pr_err("Missing tfo->sess_get_index()\n");
336 return -EINVAL;
337 }
338 if (!tfo->write_pending) {
339 pr_err("Missing tfo->write_pending()\n");
340 return -EINVAL;
341 }
342 if (!tfo->write_pending_status) {
343 pr_err("Missing tfo->write_pending_status()\n");
344 return -EINVAL;
345 }
346 if (!tfo->set_default_node_attributes) {
347 pr_err("Missing tfo->set_default_node_attributes()\n");
348 return -EINVAL;
349 }
350 if (!tfo->get_cmd_state) {
351 pr_err("Missing tfo->get_cmd_state()\n");
352 return -EINVAL;
353 }
354 if (!tfo->queue_data_in) {
355 pr_err("Missing tfo->queue_data_in()\n");
356 return -EINVAL;
357 }
358 if (!tfo->queue_status) {
359 pr_err("Missing tfo->queue_status()\n");
360 return -EINVAL;
361 }
362 if (!tfo->queue_tm_rsp) {
363 pr_err("Missing tfo->queue_tm_rsp()\n");
364 return -EINVAL;
365 }
366 if (!tfo->aborted_task) {
367 pr_err("Missing tfo->aborted_task()\n");
368 return -EINVAL;
369 }
370 /*
371 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
372 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
373 * target_core_fabric_configfs.c WWN+TPG group context code.
374 */
375 if (!tfo->fabric_make_wwn) {
376 pr_err("Missing tfo->fabric_make_wwn()\n");
377 return -EINVAL;
378 }
379 if (!tfo->fabric_drop_wwn) {
380 pr_err("Missing tfo->fabric_drop_wwn()\n");
381 return -EINVAL;
382 }
383 if (!tfo->fabric_make_tpg) {
384 pr_err("Missing tfo->fabric_make_tpg()\n");
385 return -EINVAL;
386 }
387 if (!tfo->fabric_drop_tpg) {
388 pr_err("Missing tfo->fabric_drop_tpg()\n");
389 return -EINVAL;
390 }
391
392 return 0;
393 }
394
395 int target_register_template(const struct target_core_fabric_ops *fo)
396 {
397 struct target_fabric_configfs *tf;
398 int ret;
399
400 ret = target_fabric_tf_ops_check(fo);
401 if (ret)
402 return ret;
403
404 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
405 if (!tf) {
406 pr_err("%s: could not allocate memory!\n", __func__);
407 return -ENOMEM;
408 }
409
410 INIT_LIST_HEAD(&tf->tf_list);
411 atomic_set(&tf->tf_access_cnt, 0);
412 tf->tf_ops = fo;
413 target_fabric_setup_cits(tf);
414
415 mutex_lock(&g_tf_lock);
416 list_add_tail(&tf->tf_list, &g_tf_list);
417 mutex_unlock(&g_tf_lock);
418
419 return 0;
420 }
421 EXPORT_SYMBOL(target_register_template);
422
423 void target_unregister_template(const struct target_core_fabric_ops *fo)
424 {
425 struct target_fabric_configfs *t;
426
427 mutex_lock(&g_tf_lock);
428 list_for_each_entry(t, &g_tf_list, tf_list) {
429 if (!strcmp(t->tf_ops->name, fo->name)) {
430 BUG_ON(atomic_read(&t->tf_access_cnt));
431 list_del(&t->tf_list);
432 mutex_unlock(&g_tf_lock);
433 /*
434 * Wait for any outstanding fabric se_deve_entry->rcu_head
435 * callbacks to complete post kfree_rcu(), before allowing
436 * fabric driver unload of TFO->module to proceed.
437 */
438 rcu_barrier();
439 kfree(t);
440 return;
441 }
442 }
443 mutex_unlock(&g_tf_lock);
444 }
445 EXPORT_SYMBOL(target_unregister_template);
446
447 /*##############################################################################
448 // Stop functions called by external Target Fabrics Modules
449 //############################################################################*/
450
451 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
452 {
453 return container_of(to_config_group(item), struct se_dev_attrib,
454 da_group);
455 }
456
457 /* Start functions for struct config_item_type tb_dev_attrib_cit */
458 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
459 static ssize_t _name##_show(struct config_item *item, char *page) \
460 { \
461 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
462 }
463
464 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
465 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
466 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
467 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
468 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
469 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
470 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
471 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
472 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
473 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
474 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
475 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
476 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
477 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
478 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
479 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
480 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
481 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
482 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
483 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
484 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
485 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
486 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
487 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
488 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
489 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
490 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
491 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
492 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
493 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
494
495 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
496 static ssize_t _name##_store(struct config_item *item, const char *page,\
497 size_t count) \
498 { \
499 struct se_dev_attrib *da = to_attrib(item); \
500 u32 val; \
501 int ret; \
502 \
503 ret = kstrtou32(page, 0, &val); \
504 if (ret < 0) \
505 return ret; \
506 da->_name = val; \
507 return count; \
508 }
509
510 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
511 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
512 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
513 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
514 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
515
516 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
517 static ssize_t _name##_store(struct config_item *item, const char *page, \
518 size_t count) \
519 { \
520 struct se_dev_attrib *da = to_attrib(item); \
521 bool flag; \
522 int ret; \
523 \
524 ret = strtobool(page, &flag); \
525 if (ret < 0) \
526 return ret; \
527 da->_name = flag; \
528 return count; \
529 }
530
531 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
532 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
533 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
534 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
535 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
536
537 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
538 static ssize_t _name##_store(struct config_item *item, const char *page,\
539 size_t count) \
540 { \
541 printk_once(KERN_WARNING \
542 "ignoring deprecated %s attribute\n", \
543 __stringify(_name)); \
544 return count; \
545 }
546
547 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
548 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
549
550 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
551 {
552 const char *configname;
553
554 configname = config_item_name(&dev->dev_group.cg_item);
555 if (strlen(configname) >= 16) {
556 pr_warn("dev[%p]: Backstore name '%s' is too long for "
557 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
558 configname);
559 }
560 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
561 }
562
563 static ssize_t emulate_model_alias_store(struct config_item *item,
564 const char *page, size_t count)
565 {
566 struct se_dev_attrib *da = to_attrib(item);
567 struct se_device *dev = da->da_dev;
568 bool flag;
569 int ret;
570
571 if (dev->export_count) {
572 pr_err("dev[%p]: Unable to change model alias"
573 " while export_count is %d\n",
574 dev, dev->export_count);
575 return -EINVAL;
576 }
577
578 ret = strtobool(page, &flag);
579 if (ret < 0)
580 return ret;
581
582 if (flag) {
583 dev_set_t10_wwn_model_alias(dev);
584 } else {
585 strncpy(&dev->t10_wwn.model[0],
586 dev->transport->inquiry_prod, 16);
587 }
588 da->emulate_model_alias = flag;
589 return count;
590 }
591
592 static ssize_t emulate_write_cache_store(struct config_item *item,
593 const char *page, size_t count)
594 {
595 struct se_dev_attrib *da = to_attrib(item);
596 bool flag;
597 int ret;
598
599 ret = strtobool(page, &flag);
600 if (ret < 0)
601 return ret;
602
603 if (flag && da->da_dev->transport->get_write_cache) {
604 pr_err("emulate_write_cache not supported for this device\n");
605 return -EINVAL;
606 }
607
608 da->emulate_write_cache = flag;
609 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
610 da->da_dev, flag);
611 return count;
612 }
613
614 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
615 const char *page, size_t count)
616 {
617 struct se_dev_attrib *da = to_attrib(item);
618 u32 val;
619 int ret;
620
621 ret = kstrtou32(page, 0, &val);
622 if (ret < 0)
623 return ret;
624
625 if (val != 0 && val != 1 && val != 2) {
626 pr_err("Illegal value %d\n", val);
627 return -EINVAL;
628 }
629
630 if (da->da_dev->export_count) {
631 pr_err("dev[%p]: Unable to change SE Device"
632 " UA_INTRLCK_CTRL while export_count is %d\n",
633 da->da_dev, da->da_dev->export_count);
634 return -EINVAL;
635 }
636 da->emulate_ua_intlck_ctrl = val;
637 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
638 da->da_dev, val);
639 return count;
640 }
641
642 static ssize_t emulate_tas_store(struct config_item *item,
643 const char *page, size_t count)
644 {
645 struct se_dev_attrib *da = to_attrib(item);
646 bool flag;
647 int ret;
648
649 ret = strtobool(page, &flag);
650 if (ret < 0)
651 return ret;
652
653 if (da->da_dev->export_count) {
654 pr_err("dev[%p]: Unable to change SE Device TAS while"
655 " export_count is %d\n",
656 da->da_dev, da->da_dev->export_count);
657 return -EINVAL;
658 }
659 da->emulate_tas = flag;
660 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
661 da->da_dev, flag ? "Enabled" : "Disabled");
662
663 return count;
664 }
665
666 static ssize_t emulate_tpu_store(struct config_item *item,
667 const char *page, size_t count)
668 {
669 struct se_dev_attrib *da = to_attrib(item);
670 bool flag;
671 int ret;
672
673 ret = strtobool(page, &flag);
674 if (ret < 0)
675 return ret;
676
677 /*
678 * We expect this value to be non-zero when generic Block Layer
679 * Discard supported is detected iblock_create_virtdevice().
680 */
681 if (flag && !da->max_unmap_block_desc_count) {
682 pr_err("Generic Block Discard not supported\n");
683 return -ENOSYS;
684 }
685
686 da->emulate_tpu = flag;
687 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
688 da->da_dev, flag);
689 return count;
690 }
691
692 static ssize_t emulate_tpws_store(struct config_item *item,
693 const char *page, size_t count)
694 {
695 struct se_dev_attrib *da = to_attrib(item);
696 bool flag;
697 int ret;
698
699 ret = strtobool(page, &flag);
700 if (ret < 0)
701 return ret;
702
703 /*
704 * We expect this value to be non-zero when generic Block Layer
705 * Discard supported is detected iblock_create_virtdevice().
706 */
707 if (flag && !da->max_unmap_block_desc_count) {
708 pr_err("Generic Block Discard not supported\n");
709 return -ENOSYS;
710 }
711
712 da->emulate_tpws = flag;
713 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
714 da->da_dev, flag);
715 return count;
716 }
717
718 static ssize_t pi_prot_type_store(struct config_item *item,
719 const char *page, size_t count)
720 {
721 struct se_dev_attrib *da = to_attrib(item);
722 int old_prot = da->pi_prot_type, ret;
723 struct se_device *dev = da->da_dev;
724 u32 flag;
725
726 ret = kstrtou32(page, 0, &flag);
727 if (ret < 0)
728 return ret;
729
730 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
731 pr_err("Illegal value %d for pi_prot_type\n", flag);
732 return -EINVAL;
733 }
734 if (flag == 2) {
735 pr_err("DIF TYPE2 protection currently not supported\n");
736 return -ENOSYS;
737 }
738 if (da->hw_pi_prot_type) {
739 pr_warn("DIF protection enabled on underlying hardware,"
740 " ignoring\n");
741 return count;
742 }
743 if (!dev->transport->init_prot || !dev->transport->free_prot) {
744 /* 0 is only allowed value for non-supporting backends */
745 if (flag == 0)
746 return count;
747
748 pr_err("DIF protection not supported by backend: %s\n",
749 dev->transport->name);
750 return -ENOSYS;
751 }
752 if (!(dev->dev_flags & DF_CONFIGURED)) {
753 pr_err("DIF protection requires device to be configured\n");
754 return -ENODEV;
755 }
756 if (dev->export_count) {
757 pr_err("dev[%p]: Unable to change SE Device PROT type while"
758 " export_count is %d\n", dev, dev->export_count);
759 return -EINVAL;
760 }
761
762 da->pi_prot_type = flag;
763
764 if (flag && !old_prot) {
765 ret = dev->transport->init_prot(dev);
766 if (ret) {
767 da->pi_prot_type = old_prot;
768 return ret;
769 }
770
771 } else if (!flag && old_prot) {
772 dev->transport->free_prot(dev);
773 }
774
775 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
776 return count;
777 }
778
779 static ssize_t pi_prot_format_store(struct config_item *item,
780 const char *page, size_t count)
781 {
782 struct se_dev_attrib *da = to_attrib(item);
783 struct se_device *dev = da->da_dev;
784 bool flag;
785 int ret;
786
787 ret = strtobool(page, &flag);
788 if (ret < 0)
789 return ret;
790
791 if (!flag)
792 return count;
793
794 if (!dev->transport->format_prot) {
795 pr_err("DIF protection format not supported by backend %s\n",
796 dev->transport->name);
797 return -ENOSYS;
798 }
799 if (!(dev->dev_flags & DF_CONFIGURED)) {
800 pr_err("DIF protection format requires device to be configured\n");
801 return -ENODEV;
802 }
803 if (dev->export_count) {
804 pr_err("dev[%p]: Unable to format SE Device PROT type while"
805 " export_count is %d\n", dev, dev->export_count);
806 return -EINVAL;
807 }
808
809 ret = dev->transport->format_prot(dev);
810 if (ret)
811 return ret;
812
813 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
814 return count;
815 }
816
817 static ssize_t force_pr_aptpl_store(struct config_item *item,
818 const char *page, size_t count)
819 {
820 struct se_dev_attrib *da = to_attrib(item);
821 bool flag;
822 int ret;
823
824 ret = strtobool(page, &flag);
825 if (ret < 0)
826 return ret;
827 if (da->da_dev->export_count) {
828 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
829 " export_count is %d\n",
830 da->da_dev, da->da_dev->export_count);
831 return -EINVAL;
832 }
833
834 da->force_pr_aptpl = flag;
835 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
836 return count;
837 }
838
839 static ssize_t emulate_rest_reord_store(struct config_item *item,
840 const char *page, size_t count)
841 {
842 struct se_dev_attrib *da = to_attrib(item);
843 bool flag;
844 int ret;
845
846 ret = strtobool(page, &flag);
847 if (ret < 0)
848 return ret;
849
850 if (flag != 0) {
851 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
852 " reordering not implemented\n", da->da_dev);
853 return -ENOSYS;
854 }
855 da->emulate_rest_reord = flag;
856 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
857 da->da_dev, flag);
858 return count;
859 }
860
861 static ssize_t unmap_zeroes_data_store(struct config_item *item,
862 const char *page, size_t count)
863 {
864 struct se_dev_attrib *da = to_attrib(item);
865 bool flag;
866 int ret;
867
868 ret = strtobool(page, &flag);
869 if (ret < 0)
870 return ret;
871
872 if (da->da_dev->export_count) {
873 pr_err("dev[%p]: Unable to change SE Device"
874 " unmap_zeroes_data while export_count is %d\n",
875 da->da_dev, da->da_dev->export_count);
876 return -EINVAL;
877 }
878 /*
879 * We expect this value to be non-zero when generic Block Layer
880 * Discard supported is detected iblock_configure_device().
881 */
882 if (flag && !da->max_unmap_block_desc_count) {
883 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
884 " because max_unmap_block_desc_count is zero\n",
885 da->da_dev);
886 return -ENOSYS;
887 }
888 da->unmap_zeroes_data = flag;
889 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
890 da->da_dev, flag);
891 return count;
892 }
893
894 /*
895 * Note, this can only be called on unexported SE Device Object.
896 */
897 static ssize_t queue_depth_store(struct config_item *item,
898 const char *page, size_t count)
899 {
900 struct se_dev_attrib *da = to_attrib(item);
901 struct se_device *dev = da->da_dev;
902 u32 val;
903 int ret;
904
905 ret = kstrtou32(page, 0, &val);
906 if (ret < 0)
907 return ret;
908
909 if (dev->export_count) {
910 pr_err("dev[%p]: Unable to change SE Device TCQ while"
911 " export_count is %d\n",
912 dev, dev->export_count);
913 return -EINVAL;
914 }
915 if (!val) {
916 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
917 return -EINVAL;
918 }
919
920 if (val > dev->dev_attrib.queue_depth) {
921 if (val > dev->dev_attrib.hw_queue_depth) {
922 pr_err("dev[%p]: Passed queue_depth:"
923 " %u exceeds TCM/SE_Device MAX"
924 " TCQ: %u\n", dev, val,
925 dev->dev_attrib.hw_queue_depth);
926 return -EINVAL;
927 }
928 }
929 da->queue_depth = dev->queue_depth = val;
930 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
931 return count;
932 }
933
934 static ssize_t optimal_sectors_store(struct config_item *item,
935 const char *page, size_t count)
936 {
937 struct se_dev_attrib *da = to_attrib(item);
938 u32 val;
939 int ret;
940
941 ret = kstrtou32(page, 0, &val);
942 if (ret < 0)
943 return ret;
944
945 if (da->da_dev->export_count) {
946 pr_err("dev[%p]: Unable to change SE Device"
947 " optimal_sectors while export_count is %d\n",
948 da->da_dev, da->da_dev->export_count);
949 return -EINVAL;
950 }
951 if (val > da->hw_max_sectors) {
952 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
953 " greater than hw_max_sectors: %u\n",
954 da->da_dev, val, da->hw_max_sectors);
955 return -EINVAL;
956 }
957
958 da->optimal_sectors = val;
959 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
960 da->da_dev, val);
961 return count;
962 }
963
964 static ssize_t block_size_store(struct config_item *item,
965 const char *page, size_t count)
966 {
967 struct se_dev_attrib *da = to_attrib(item);
968 u32 val;
969 int ret;
970
971 ret = kstrtou32(page, 0, &val);
972 if (ret < 0)
973 return ret;
974
975 if (da->da_dev->export_count) {
976 pr_err("dev[%p]: Unable to change SE Device block_size"
977 " while export_count is %d\n",
978 da->da_dev, da->da_dev->export_count);
979 return -EINVAL;
980 }
981
982 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
983 pr_err("dev[%p]: Illegal value for block_device: %u"
984 " for SE device, must be 512, 1024, 2048 or 4096\n",
985 da->da_dev, val);
986 return -EINVAL;
987 }
988
989 da->block_size = val;
990 if (da->max_bytes_per_io)
991 da->hw_max_sectors = da->max_bytes_per_io / val;
992
993 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
994 da->da_dev, val);
995 return count;
996 }
997
998 CONFIGFS_ATTR(, emulate_model_alias);
999 CONFIGFS_ATTR(, emulate_dpo);
1000 CONFIGFS_ATTR(, emulate_fua_write);
1001 CONFIGFS_ATTR(, emulate_fua_read);
1002 CONFIGFS_ATTR(, emulate_write_cache);
1003 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1004 CONFIGFS_ATTR(, emulate_tas);
1005 CONFIGFS_ATTR(, emulate_tpu);
1006 CONFIGFS_ATTR(, emulate_tpws);
1007 CONFIGFS_ATTR(, emulate_caw);
1008 CONFIGFS_ATTR(, emulate_3pc);
1009 CONFIGFS_ATTR(, pi_prot_type);
1010 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1011 CONFIGFS_ATTR(, pi_prot_format);
1012 CONFIGFS_ATTR(, enforce_pr_isids);
1013 CONFIGFS_ATTR(, is_nonrot);
1014 CONFIGFS_ATTR(, emulate_rest_reord);
1015 CONFIGFS_ATTR(, force_pr_aptpl);
1016 CONFIGFS_ATTR_RO(, hw_block_size);
1017 CONFIGFS_ATTR(, block_size);
1018 CONFIGFS_ATTR_RO(, hw_max_sectors);
1019 CONFIGFS_ATTR(, optimal_sectors);
1020 CONFIGFS_ATTR_RO(, hw_queue_depth);
1021 CONFIGFS_ATTR(, queue_depth);
1022 CONFIGFS_ATTR(, max_unmap_lba_count);
1023 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1024 CONFIGFS_ATTR(, unmap_granularity);
1025 CONFIGFS_ATTR(, unmap_granularity_alignment);
1026 CONFIGFS_ATTR(, unmap_zeroes_data);
1027 CONFIGFS_ATTR(, max_write_same_len);
1028
1029 /*
1030 * dev_attrib attributes for devices using the target core SBC/SPC
1031 * interpreter. Any backend using spc_parse_cdb should be using
1032 * these.
1033 */
1034 struct configfs_attribute *sbc_attrib_attrs[] = {
1035 &attr_emulate_model_alias,
1036 &attr_emulate_dpo,
1037 &attr_emulate_fua_write,
1038 &attr_emulate_fua_read,
1039 &attr_emulate_write_cache,
1040 &attr_emulate_ua_intlck_ctrl,
1041 &attr_emulate_tas,
1042 &attr_emulate_tpu,
1043 &attr_emulate_tpws,
1044 &attr_emulate_caw,
1045 &attr_emulate_3pc,
1046 &attr_pi_prot_type,
1047 &attr_hw_pi_prot_type,
1048 &attr_pi_prot_format,
1049 &attr_enforce_pr_isids,
1050 &attr_is_nonrot,
1051 &attr_emulate_rest_reord,
1052 &attr_force_pr_aptpl,
1053 &attr_hw_block_size,
1054 &attr_block_size,
1055 &attr_hw_max_sectors,
1056 &attr_optimal_sectors,
1057 &attr_hw_queue_depth,
1058 &attr_queue_depth,
1059 &attr_max_unmap_lba_count,
1060 &attr_max_unmap_block_desc_count,
1061 &attr_unmap_granularity,
1062 &attr_unmap_granularity_alignment,
1063 &attr_unmap_zeroes_data,
1064 &attr_max_write_same_len,
1065 NULL,
1066 };
1067 EXPORT_SYMBOL(sbc_attrib_attrs);
1068
1069 /*
1070 * Minimal dev_attrib attributes for devices passing through CDBs.
1071 * In this case we only provide a few read-only attributes for
1072 * backwards compatibility.
1073 */
1074 struct configfs_attribute *passthrough_attrib_attrs[] = {
1075 &attr_hw_pi_prot_type,
1076 &attr_hw_block_size,
1077 &attr_hw_max_sectors,
1078 &attr_hw_queue_depth,
1079 NULL,
1080 };
1081 EXPORT_SYMBOL(passthrough_attrib_attrs);
1082
1083 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1084
1085 /* End functions for struct config_item_type tb_dev_attrib_cit */
1086
1087 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1088
1089 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1090 {
1091 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1092 }
1093
1094 /*
1095 * VPD page 0x80 Unit serial
1096 */
1097 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1098 char *page)
1099 {
1100 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1101 &to_t10_wwn(item)->unit_serial[0]);
1102 }
1103
1104 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1105 const char *page, size_t count)
1106 {
1107 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1108 struct se_device *dev = t10_wwn->t10_dev;
1109 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1110
1111 /*
1112 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1113 * from the struct scsi_device level firmware, do not allow
1114 * VPD Unit Serial to be emulated.
1115 *
1116 * Note this struct scsi_device could also be emulating VPD
1117 * information from its drivers/scsi LLD. But for now we assume
1118 * it is doing 'the right thing' wrt a world wide unique
1119 * VPD Unit Serial Number that OS dependent multipath can depend on.
1120 */
1121 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1122 pr_err("Underlying SCSI device firmware provided VPD"
1123 " Unit Serial, ignoring request\n");
1124 return -EOPNOTSUPP;
1125 }
1126
1127 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1128 pr_err("Emulated VPD Unit Serial exceeds"
1129 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1130 return -EOVERFLOW;
1131 }
1132 /*
1133 * Check to see if any active $FABRIC_MOD exports exist. If they
1134 * do exist, fail here as changing this information on the fly
1135 * (underneath the initiator side OS dependent multipath code)
1136 * could cause negative effects.
1137 */
1138 if (dev->export_count) {
1139 pr_err("Unable to set VPD Unit Serial while"
1140 " active %d $FABRIC_MOD exports exist\n",
1141 dev->export_count);
1142 return -EINVAL;
1143 }
1144
1145 /*
1146 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1147 *
1148 * Also, strip any newline added from the userspace
1149 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1150 */
1151 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1152 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1153 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1154 "%s", strstrip(buf));
1155 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1156
1157 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1158 " %s\n", dev->t10_wwn.unit_serial);
1159
1160 return count;
1161 }
1162
1163 /*
1164 * VPD page 0x83 Protocol Identifier
1165 */
1166 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1167 char *page)
1168 {
1169 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1170 struct t10_vpd *vpd;
1171 unsigned char buf[VPD_TMP_BUF_SIZE];
1172 ssize_t len = 0;
1173
1174 memset(buf, 0, VPD_TMP_BUF_SIZE);
1175
1176 spin_lock(&t10_wwn->t10_vpd_lock);
1177 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1178 if (!vpd->protocol_identifier_set)
1179 continue;
1180
1181 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1182
1183 if (len + strlen(buf) >= PAGE_SIZE)
1184 break;
1185
1186 len += sprintf(page+len, "%s", buf);
1187 }
1188 spin_unlock(&t10_wwn->t10_vpd_lock);
1189
1190 return len;
1191 }
1192
1193 /*
1194 * Generic wrapper for dumping VPD identifiers by association.
1195 */
1196 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1197 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1198 char *page) \
1199 { \
1200 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1201 struct t10_vpd *vpd; \
1202 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1203 ssize_t len = 0; \
1204 \
1205 spin_lock(&t10_wwn->t10_vpd_lock); \
1206 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1207 if (vpd->association != _assoc) \
1208 continue; \
1209 \
1210 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1211 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1212 if (len + strlen(buf) >= PAGE_SIZE) \
1213 break; \
1214 len += sprintf(page+len, "%s", buf); \
1215 \
1216 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1217 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1218 if (len + strlen(buf) >= PAGE_SIZE) \
1219 break; \
1220 len += sprintf(page+len, "%s", buf); \
1221 \
1222 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1223 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1224 if (len + strlen(buf) >= PAGE_SIZE) \
1225 break; \
1226 len += sprintf(page+len, "%s", buf); \
1227 } \
1228 spin_unlock(&t10_wwn->t10_vpd_lock); \
1229 \
1230 return len; \
1231 }
1232
1233 /* VPD page 0x83 Association: Logical Unit */
1234 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1235 /* VPD page 0x83 Association: Target Port */
1236 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1237 /* VPD page 0x83 Association: SCSI Target Device */
1238 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1239
1240 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1241 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1242 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1243 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1244 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1245
1246 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1247 &target_wwn_attr_vpd_unit_serial,
1248 &target_wwn_attr_vpd_protocol_identifier,
1249 &target_wwn_attr_vpd_assoc_logical_unit,
1250 &target_wwn_attr_vpd_assoc_target_port,
1251 &target_wwn_attr_vpd_assoc_scsi_target_device,
1252 NULL,
1253 };
1254
1255 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1256
1257 /* End functions for struct config_item_type tb_dev_wwn_cit */
1258
1259 /* Start functions for struct config_item_type tb_dev_pr_cit */
1260
1261 static struct se_device *pr_to_dev(struct config_item *item)
1262 {
1263 return container_of(to_config_group(item), struct se_device,
1264 dev_pr_group);
1265 }
1266
1267 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1268 char *page)
1269 {
1270 struct se_node_acl *se_nacl;
1271 struct t10_pr_registration *pr_reg;
1272 char i_buf[PR_REG_ISID_ID_LEN];
1273
1274 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1275
1276 pr_reg = dev->dev_pr_res_holder;
1277 if (!pr_reg)
1278 return sprintf(page, "No SPC-3 Reservation holder\n");
1279
1280 se_nacl = pr_reg->pr_reg_nacl;
1281 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1282
1283 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1284 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1285 se_nacl->initiatorname, i_buf);
1286 }
1287
1288 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1289 char *page)
1290 {
1291 struct se_node_acl *se_nacl;
1292 ssize_t len;
1293
1294 se_nacl = dev->dev_reserved_node_acl;
1295 if (se_nacl) {
1296 len = sprintf(page,
1297 "SPC-2 Reservation: %s Initiator: %s\n",
1298 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1299 se_nacl->initiatorname);
1300 } else {
1301 len = sprintf(page, "No SPC-2 Reservation holder\n");
1302 }
1303 return len;
1304 }
1305
1306 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1307 {
1308 struct se_device *dev = pr_to_dev(item);
1309 int ret;
1310
1311 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1312 return sprintf(page, "Passthrough\n");
1313
1314 spin_lock(&dev->dev_reservation_lock);
1315 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1316 ret = target_core_dev_pr_show_spc2_res(dev, page);
1317 else
1318 ret = target_core_dev_pr_show_spc3_res(dev, page);
1319 spin_unlock(&dev->dev_reservation_lock);
1320 return ret;
1321 }
1322
1323 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1324 char *page)
1325 {
1326 struct se_device *dev = pr_to_dev(item);
1327 ssize_t len = 0;
1328
1329 spin_lock(&dev->dev_reservation_lock);
1330 if (!dev->dev_pr_res_holder) {
1331 len = sprintf(page, "No SPC-3 Reservation holder\n");
1332 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1333 len = sprintf(page, "SPC-3 Reservation: All Target"
1334 " Ports registration\n");
1335 } else {
1336 len = sprintf(page, "SPC-3 Reservation: Single"
1337 " Target Port registration\n");
1338 }
1339
1340 spin_unlock(&dev->dev_reservation_lock);
1341 return len;
1342 }
1343
1344 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1345 char *page)
1346 {
1347 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1348 }
1349
1350
1351 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1352 char *page)
1353 {
1354 struct se_device *dev = pr_to_dev(item);
1355 struct se_node_acl *se_nacl;
1356 struct se_portal_group *se_tpg;
1357 struct t10_pr_registration *pr_reg;
1358 const struct target_core_fabric_ops *tfo;
1359 ssize_t len = 0;
1360
1361 spin_lock(&dev->dev_reservation_lock);
1362 pr_reg = dev->dev_pr_res_holder;
1363 if (!pr_reg) {
1364 len = sprintf(page, "No SPC-3 Reservation holder\n");
1365 goto out_unlock;
1366 }
1367
1368 se_nacl = pr_reg->pr_reg_nacl;
1369 se_tpg = se_nacl->se_tpg;
1370 tfo = se_tpg->se_tpg_tfo;
1371
1372 len += sprintf(page+len, "SPC-3 Reservation: %s"
1373 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1374 tfo->tpg_get_wwn(se_tpg));
1375 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1376 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1377 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1378 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1379 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1380
1381 out_unlock:
1382 spin_unlock(&dev->dev_reservation_lock);
1383 return len;
1384 }
1385
1386
1387 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1388 char *page)
1389 {
1390 struct se_device *dev = pr_to_dev(item);
1391 const struct target_core_fabric_ops *tfo;
1392 struct t10_pr_registration *pr_reg;
1393 unsigned char buf[384];
1394 char i_buf[PR_REG_ISID_ID_LEN];
1395 ssize_t len = 0;
1396 int reg_count = 0;
1397
1398 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1399
1400 spin_lock(&dev->t10_pr.registration_lock);
1401 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1402 pr_reg_list) {
1403
1404 memset(buf, 0, 384);
1405 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1406 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1407 core_pr_dump_initiator_port(pr_reg, i_buf,
1408 PR_REG_ISID_ID_LEN);
1409 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1410 tfo->get_fabric_name(),
1411 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1412 pr_reg->pr_res_generation);
1413
1414 if (len + strlen(buf) >= PAGE_SIZE)
1415 break;
1416
1417 len += sprintf(page+len, "%s", buf);
1418 reg_count++;
1419 }
1420 spin_unlock(&dev->t10_pr.registration_lock);
1421
1422 if (!reg_count)
1423 len += sprintf(page+len, "None\n");
1424
1425 return len;
1426 }
1427
1428 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1429 {
1430 struct se_device *dev = pr_to_dev(item);
1431 struct t10_pr_registration *pr_reg;
1432 ssize_t len = 0;
1433
1434 spin_lock(&dev->dev_reservation_lock);
1435 pr_reg = dev->dev_pr_res_holder;
1436 if (pr_reg) {
1437 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1438 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1439 } else {
1440 len = sprintf(page, "No SPC-3 Reservation holder\n");
1441 }
1442
1443 spin_unlock(&dev->dev_reservation_lock);
1444 return len;
1445 }
1446
1447 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1448 {
1449 struct se_device *dev = pr_to_dev(item);
1450
1451 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1452 return sprintf(page, "SPC_PASSTHROUGH\n");
1453 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1454 return sprintf(page, "SPC2_RESERVATIONS\n");
1455 else
1456 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1457 }
1458
1459 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1460 char *page)
1461 {
1462 struct se_device *dev = pr_to_dev(item);
1463
1464 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1465 return 0;
1466
1467 return sprintf(page, "APTPL Bit Status: %s\n",
1468 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1469 }
1470
1471 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1472 char *page)
1473 {
1474 struct se_device *dev = pr_to_dev(item);
1475
1476 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1477 return 0;
1478
1479 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1480 }
1481
1482 enum {
1483 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1484 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1485 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1486 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1487 };
1488
1489 static match_table_t tokens = {
1490 {Opt_initiator_fabric, "initiator_fabric=%s"},
1491 {Opt_initiator_node, "initiator_node=%s"},
1492 {Opt_initiator_sid, "initiator_sid=%s"},
1493 {Opt_sa_res_key, "sa_res_key=%s"},
1494 {Opt_res_holder, "res_holder=%d"},
1495 {Opt_res_type, "res_type=%d"},
1496 {Opt_res_scope, "res_scope=%d"},
1497 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1498 {Opt_mapped_lun, "mapped_lun=%lld"},
1499 {Opt_target_fabric, "target_fabric=%s"},
1500 {Opt_target_node, "target_node=%s"},
1501 {Opt_tpgt, "tpgt=%d"},
1502 {Opt_port_rtpi, "port_rtpi=%d"},
1503 {Opt_target_lun, "target_lun=%lld"},
1504 {Opt_err, NULL}
1505 };
1506
1507 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1508 const char *page, size_t count)
1509 {
1510 struct se_device *dev = pr_to_dev(item);
1511 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1512 unsigned char *t_fabric = NULL, *t_port = NULL;
1513 char *orig, *ptr, *opts;
1514 substring_t args[MAX_OPT_ARGS];
1515 unsigned long long tmp_ll;
1516 u64 sa_res_key = 0;
1517 u64 mapped_lun = 0, target_lun = 0;
1518 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1519 u16 tpgt = 0;
1520 u8 type = 0;
1521
1522 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1523 return count;
1524 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1525 return count;
1526
1527 if (dev->export_count) {
1528 pr_debug("Unable to process APTPL metadata while"
1529 " active fabric exports exist\n");
1530 return -EINVAL;
1531 }
1532
1533 opts = kstrdup(page, GFP_KERNEL);
1534 if (!opts)
1535 return -ENOMEM;
1536
1537 orig = opts;
1538 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1539 if (!*ptr)
1540 continue;
1541
1542 token = match_token(ptr, tokens, args);
1543 switch (token) {
1544 case Opt_initiator_fabric:
1545 i_fabric = match_strdup(args);
1546 if (!i_fabric) {
1547 ret = -ENOMEM;
1548 goto out;
1549 }
1550 break;
1551 case Opt_initiator_node:
1552 i_port = match_strdup(args);
1553 if (!i_port) {
1554 ret = -ENOMEM;
1555 goto out;
1556 }
1557 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1558 pr_err("APTPL metadata initiator_node="
1559 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1560 PR_APTPL_MAX_IPORT_LEN);
1561 ret = -EINVAL;
1562 break;
1563 }
1564 break;
1565 case Opt_initiator_sid:
1566 isid = match_strdup(args);
1567 if (!isid) {
1568 ret = -ENOMEM;
1569 goto out;
1570 }
1571 if (strlen(isid) >= PR_REG_ISID_LEN) {
1572 pr_err("APTPL metadata initiator_isid"
1573 "= exceeds PR_REG_ISID_LEN: %d\n",
1574 PR_REG_ISID_LEN);
1575 ret = -EINVAL;
1576 break;
1577 }
1578 break;
1579 case Opt_sa_res_key:
1580 ret = kstrtoull(args->from, 0, &tmp_ll);
1581 if (ret < 0) {
1582 pr_err("kstrtoull() failed for sa_res_key=\n");
1583 goto out;
1584 }
1585 sa_res_key = (u64)tmp_ll;
1586 break;
1587 /*
1588 * PR APTPL Metadata for Reservation
1589 */
1590 case Opt_res_holder:
1591 ret = match_int(args, &arg);
1592 if (ret)
1593 goto out;
1594 res_holder = arg;
1595 break;
1596 case Opt_res_type:
1597 ret = match_int(args, &arg);
1598 if (ret)
1599 goto out;
1600 type = (u8)arg;
1601 break;
1602 case Opt_res_scope:
1603 ret = match_int(args, &arg);
1604 if (ret)
1605 goto out;
1606 break;
1607 case Opt_res_all_tg_pt:
1608 ret = match_int(args, &arg);
1609 if (ret)
1610 goto out;
1611 all_tg_pt = (int)arg;
1612 break;
1613 case Opt_mapped_lun:
1614 ret = match_int(args, &arg);
1615 if (ret)
1616 goto out;
1617 mapped_lun = (u64)arg;
1618 break;
1619 /*
1620 * PR APTPL Metadata for Target Port
1621 */
1622 case Opt_target_fabric:
1623 t_fabric = match_strdup(args);
1624 if (!t_fabric) {
1625 ret = -ENOMEM;
1626 goto out;
1627 }
1628 break;
1629 case Opt_target_node:
1630 t_port = match_strdup(args);
1631 if (!t_port) {
1632 ret = -ENOMEM;
1633 goto out;
1634 }
1635 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1636 pr_err("APTPL metadata target_node="
1637 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1638 PR_APTPL_MAX_TPORT_LEN);
1639 ret = -EINVAL;
1640 break;
1641 }
1642 break;
1643 case Opt_tpgt:
1644 ret = match_int(args, &arg);
1645 if (ret)
1646 goto out;
1647 tpgt = (u16)arg;
1648 break;
1649 case Opt_port_rtpi:
1650 ret = match_int(args, &arg);
1651 if (ret)
1652 goto out;
1653 break;
1654 case Opt_target_lun:
1655 ret = match_int(args, &arg);
1656 if (ret)
1657 goto out;
1658 target_lun = (u64)arg;
1659 break;
1660 default:
1661 break;
1662 }
1663 }
1664
1665 if (!i_port || !t_port || !sa_res_key) {
1666 pr_err("Illegal parameters for APTPL registration\n");
1667 ret = -EINVAL;
1668 goto out;
1669 }
1670
1671 if (res_holder && !(type)) {
1672 pr_err("Illegal PR type: 0x%02x for reservation"
1673 " holder\n", type);
1674 ret = -EINVAL;
1675 goto out;
1676 }
1677
1678 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1679 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1680 res_holder, all_tg_pt, type);
1681 out:
1682 kfree(i_fabric);
1683 kfree(i_port);
1684 kfree(isid);
1685 kfree(t_fabric);
1686 kfree(t_port);
1687 kfree(orig);
1688 return (ret == 0) ? count : ret;
1689 }
1690
1691
1692 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1693 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1694 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1695 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1696 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1697 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1698 CONFIGFS_ATTR_RO(target_pr_, res_type);
1699 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1700 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1701
1702 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1703 &target_pr_attr_res_holder,
1704 &target_pr_attr_res_pr_all_tgt_pts,
1705 &target_pr_attr_res_pr_generation,
1706 &target_pr_attr_res_pr_holder_tg_port,
1707 &target_pr_attr_res_pr_registered_i_pts,
1708 &target_pr_attr_res_pr_type,
1709 &target_pr_attr_res_type,
1710 &target_pr_attr_res_aptpl_active,
1711 &target_pr_attr_res_aptpl_metadata,
1712 NULL,
1713 };
1714
1715 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1716
1717 /* End functions for struct config_item_type tb_dev_pr_cit */
1718
1719 /* Start functions for struct config_item_type tb_dev_cit */
1720
1721 static inline struct se_device *to_device(struct config_item *item)
1722 {
1723 return container_of(to_config_group(item), struct se_device, dev_group);
1724 }
1725
1726 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1727 {
1728 struct se_device *dev = to_device(item);
1729 int bl = 0;
1730 ssize_t read_bytes = 0;
1731
1732 transport_dump_dev_state(dev, page, &bl);
1733 read_bytes += bl;
1734 read_bytes += dev->transport->show_configfs_dev_params(dev,
1735 page+read_bytes);
1736 return read_bytes;
1737 }
1738
1739 static ssize_t target_dev_control_store(struct config_item *item,
1740 const char *page, size_t count)
1741 {
1742 struct se_device *dev = to_device(item);
1743
1744 return dev->transport->set_configfs_dev_params(dev, page, count);
1745 }
1746
1747 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1748 {
1749 struct se_device *dev = to_device(item);
1750
1751 if (!(dev->dev_flags & DF_USING_ALIAS))
1752 return 0;
1753
1754 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1755 }
1756
1757 static ssize_t target_dev_alias_store(struct config_item *item,
1758 const char *page, size_t count)
1759 {
1760 struct se_device *dev = to_device(item);
1761 struct se_hba *hba = dev->se_hba;
1762 ssize_t read_bytes;
1763
1764 if (count > (SE_DEV_ALIAS_LEN-1)) {
1765 pr_err("alias count: %d exceeds"
1766 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1767 SE_DEV_ALIAS_LEN-1);
1768 return -EINVAL;
1769 }
1770
1771 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1772 if (!read_bytes)
1773 return -EINVAL;
1774 if (dev->dev_alias[read_bytes - 1] == '\n')
1775 dev->dev_alias[read_bytes - 1] = '\0';
1776
1777 dev->dev_flags |= DF_USING_ALIAS;
1778
1779 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1780 config_item_name(&hba->hba_group.cg_item),
1781 config_item_name(&dev->dev_group.cg_item),
1782 dev->dev_alias);
1783
1784 return read_bytes;
1785 }
1786
1787 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1788 {
1789 struct se_device *dev = to_device(item);
1790
1791 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1792 return 0;
1793
1794 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1795 }
1796
1797 static ssize_t target_dev_udev_path_store(struct config_item *item,
1798 const char *page, size_t count)
1799 {
1800 struct se_device *dev = to_device(item);
1801 struct se_hba *hba = dev->se_hba;
1802 ssize_t read_bytes;
1803
1804 if (count > (SE_UDEV_PATH_LEN-1)) {
1805 pr_err("udev_path count: %d exceeds"
1806 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1807 SE_UDEV_PATH_LEN-1);
1808 return -EINVAL;
1809 }
1810
1811 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1812 "%s", page);
1813 if (!read_bytes)
1814 return -EINVAL;
1815 if (dev->udev_path[read_bytes - 1] == '\n')
1816 dev->udev_path[read_bytes - 1] = '\0';
1817
1818 dev->dev_flags |= DF_USING_UDEV_PATH;
1819
1820 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1821 config_item_name(&hba->hba_group.cg_item),
1822 config_item_name(&dev->dev_group.cg_item),
1823 dev->udev_path);
1824
1825 return read_bytes;
1826 }
1827
1828 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1829 {
1830 struct se_device *dev = to_device(item);
1831
1832 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1833 }
1834
1835 static ssize_t target_dev_enable_store(struct config_item *item,
1836 const char *page, size_t count)
1837 {
1838 struct se_device *dev = to_device(item);
1839 char *ptr;
1840 int ret;
1841
1842 ptr = strstr(page, "1");
1843 if (!ptr) {
1844 pr_err("For dev_enable ops, only valid value"
1845 " is \"1\"\n");
1846 return -EINVAL;
1847 }
1848
1849 ret = target_configure_device(dev);
1850 if (ret)
1851 return ret;
1852 return count;
1853 }
1854
1855 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1856 {
1857 struct se_device *dev = to_device(item);
1858 struct config_item *lu_ci;
1859 struct t10_alua_lu_gp *lu_gp;
1860 struct t10_alua_lu_gp_member *lu_gp_mem;
1861 ssize_t len = 0;
1862
1863 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1864 if (!lu_gp_mem)
1865 return 0;
1866
1867 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1868 lu_gp = lu_gp_mem->lu_gp;
1869 if (lu_gp) {
1870 lu_ci = &lu_gp->lu_gp_group.cg_item;
1871 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1872 config_item_name(lu_ci), lu_gp->lu_gp_id);
1873 }
1874 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1875
1876 return len;
1877 }
1878
1879 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1880 const char *page, size_t count)
1881 {
1882 struct se_device *dev = to_device(item);
1883 struct se_hba *hba = dev->se_hba;
1884 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1885 struct t10_alua_lu_gp_member *lu_gp_mem;
1886 unsigned char buf[LU_GROUP_NAME_BUF];
1887 int move = 0;
1888
1889 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1890 if (!lu_gp_mem)
1891 return count;
1892
1893 if (count > LU_GROUP_NAME_BUF) {
1894 pr_err("ALUA LU Group Alias too large!\n");
1895 return -EINVAL;
1896 }
1897 memset(buf, 0, LU_GROUP_NAME_BUF);
1898 memcpy(buf, page, count);
1899 /*
1900 * Any ALUA logical unit alias besides "NULL" means we will be
1901 * making a new group association.
1902 */
1903 if (strcmp(strstrip(buf), "NULL")) {
1904 /*
1905 * core_alua_get_lu_gp_by_name() will increment reference to
1906 * struct t10_alua_lu_gp. This reference is released with
1907 * core_alua_get_lu_gp_by_name below().
1908 */
1909 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1910 if (!lu_gp_new)
1911 return -ENODEV;
1912 }
1913
1914 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1915 lu_gp = lu_gp_mem->lu_gp;
1916 if (lu_gp) {
1917 /*
1918 * Clearing an existing lu_gp association, and replacing
1919 * with NULL
1920 */
1921 if (!lu_gp_new) {
1922 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1923 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1924 " %hu\n",
1925 config_item_name(&hba->hba_group.cg_item),
1926 config_item_name(&dev->dev_group.cg_item),
1927 config_item_name(&lu_gp->lu_gp_group.cg_item),
1928 lu_gp->lu_gp_id);
1929
1930 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1931 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1932
1933 return count;
1934 }
1935 /*
1936 * Removing existing association of lu_gp_mem with lu_gp
1937 */
1938 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1939 move = 1;
1940 }
1941 /*
1942 * Associate lu_gp_mem with lu_gp_new.
1943 */
1944 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1945 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1946
1947 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1948 " core/alua/lu_gps/%s, ID: %hu\n",
1949 (move) ? "Moving" : "Adding",
1950 config_item_name(&hba->hba_group.cg_item),
1951 config_item_name(&dev->dev_group.cg_item),
1952 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1953 lu_gp_new->lu_gp_id);
1954
1955 core_alua_put_lu_gp_from_name(lu_gp_new);
1956 return count;
1957 }
1958
1959 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
1960 {
1961 struct se_device *dev = to_device(item);
1962 struct t10_alua_lba_map *map;
1963 struct t10_alua_lba_map_member *mem;
1964 char *b = page;
1965 int bl = 0;
1966 char state;
1967
1968 spin_lock(&dev->t10_alua.lba_map_lock);
1969 if (!list_empty(&dev->t10_alua.lba_map_list))
1970 bl += sprintf(b + bl, "%u %u\n",
1971 dev->t10_alua.lba_map_segment_size,
1972 dev->t10_alua.lba_map_segment_multiplier);
1973 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1974 bl += sprintf(b + bl, "%llu %llu",
1975 map->lba_map_first_lba, map->lba_map_last_lba);
1976 list_for_each_entry(mem, &map->lba_map_mem_list,
1977 lba_map_mem_list) {
1978 switch (mem->lba_map_mem_alua_state) {
1979 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1980 state = 'O';
1981 break;
1982 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1983 state = 'A';
1984 break;
1985 case ALUA_ACCESS_STATE_STANDBY:
1986 state = 'S';
1987 break;
1988 case ALUA_ACCESS_STATE_UNAVAILABLE:
1989 state = 'U';
1990 break;
1991 default:
1992 state = '.';
1993 break;
1994 }
1995 bl += sprintf(b + bl, " %d:%c",
1996 mem->lba_map_mem_alua_pg_id, state);
1997 }
1998 bl += sprintf(b + bl, "\n");
1999 }
2000 spin_unlock(&dev->t10_alua.lba_map_lock);
2001 return bl;
2002 }
2003
2004 static ssize_t target_dev_lba_map_store(struct config_item *item,
2005 const char *page, size_t count)
2006 {
2007 struct se_device *dev = to_device(item);
2008 struct t10_alua_lba_map *lba_map = NULL;
2009 struct list_head lba_list;
2010 char *map_entries, *orig, *ptr;
2011 char state;
2012 int pg_num = -1, pg;
2013 int ret = 0, num = 0, pg_id, alua_state;
2014 unsigned long start_lba = -1, end_lba = -1;
2015 unsigned long segment_size = -1, segment_mult = -1;
2016
2017 orig = map_entries = kstrdup(page, GFP_KERNEL);
2018 if (!map_entries)
2019 return -ENOMEM;
2020
2021 INIT_LIST_HEAD(&lba_list);
2022 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2023 if (!*ptr)
2024 continue;
2025
2026 if (num == 0) {
2027 if (sscanf(ptr, "%lu %lu\n",
2028 &segment_size, &segment_mult) != 2) {
2029 pr_err("Invalid line %d\n", num);
2030 ret = -EINVAL;
2031 break;
2032 }
2033 num++;
2034 continue;
2035 }
2036 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2037 pr_err("Invalid line %d\n", num);
2038 ret = -EINVAL;
2039 break;
2040 }
2041 ptr = strchr(ptr, ' ');
2042 if (!ptr) {
2043 pr_err("Invalid line %d, missing end lba\n", num);
2044 ret = -EINVAL;
2045 break;
2046 }
2047 ptr++;
2048 ptr = strchr(ptr, ' ');
2049 if (!ptr) {
2050 pr_err("Invalid line %d, missing state definitions\n",
2051 num);
2052 ret = -EINVAL;
2053 break;
2054 }
2055 ptr++;
2056 lba_map = core_alua_allocate_lba_map(&lba_list,
2057 start_lba, end_lba);
2058 if (IS_ERR(lba_map)) {
2059 ret = PTR_ERR(lba_map);
2060 break;
2061 }
2062 pg = 0;
2063 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2064 switch (state) {
2065 case 'O':
2066 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2067 break;
2068 case 'A':
2069 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2070 break;
2071 case 'S':
2072 alua_state = ALUA_ACCESS_STATE_STANDBY;
2073 break;
2074 case 'U':
2075 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2076 break;
2077 default:
2078 pr_err("Invalid ALUA state '%c'\n", state);
2079 ret = -EINVAL;
2080 goto out;
2081 }
2082
2083 ret = core_alua_allocate_lba_map_mem(lba_map,
2084 pg_id, alua_state);
2085 if (ret) {
2086 pr_err("Invalid target descriptor %d:%c "
2087 "at line %d\n",
2088 pg_id, state, num);
2089 break;
2090 }
2091 pg++;
2092 ptr = strchr(ptr, ' ');
2093 if (ptr)
2094 ptr++;
2095 else
2096 break;
2097 }
2098 if (pg_num == -1)
2099 pg_num = pg;
2100 else if (pg != pg_num) {
2101 pr_err("Only %d from %d port groups definitions "
2102 "at line %d\n", pg, pg_num, num);
2103 ret = -EINVAL;
2104 break;
2105 }
2106 num++;
2107 }
2108 out:
2109 if (ret) {
2110 core_alua_free_lba_map(&lba_list);
2111 count = ret;
2112 } else
2113 core_alua_set_lba_map(dev, &lba_list,
2114 segment_size, segment_mult);
2115 kfree(orig);
2116 return count;
2117 }
2118
2119 CONFIGFS_ATTR_RO(target_dev_, info);
2120 CONFIGFS_ATTR_WO(target_dev_, control);
2121 CONFIGFS_ATTR(target_dev_, alias);
2122 CONFIGFS_ATTR(target_dev_, udev_path);
2123 CONFIGFS_ATTR(target_dev_, enable);
2124 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2125 CONFIGFS_ATTR(target_dev_, lba_map);
2126
2127 static struct configfs_attribute *target_core_dev_attrs[] = {
2128 &target_dev_attr_info,
2129 &target_dev_attr_control,
2130 &target_dev_attr_alias,
2131 &target_dev_attr_udev_path,
2132 &target_dev_attr_enable,
2133 &target_dev_attr_alua_lu_gp,
2134 &target_dev_attr_lba_map,
2135 NULL,
2136 };
2137
2138 static void target_core_dev_release(struct config_item *item)
2139 {
2140 struct config_group *dev_cg = to_config_group(item);
2141 struct se_device *dev =
2142 container_of(dev_cg, struct se_device, dev_group);
2143
2144 target_free_device(dev);
2145 }
2146
2147 static struct configfs_item_operations target_core_dev_item_ops = {
2148 .release = target_core_dev_release,
2149 };
2150
2151 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2152
2153 /* End functions for struct config_item_type tb_dev_cit */
2154
2155 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2156
2157 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2158 {
2159 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2160 lu_gp_group);
2161 }
2162
2163 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2164 {
2165 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2166
2167 if (!lu_gp->lu_gp_valid_id)
2168 return 0;
2169 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2170 }
2171
2172 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2173 const char *page, size_t count)
2174 {
2175 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2176 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2177 unsigned long lu_gp_id;
2178 int ret;
2179
2180 ret = kstrtoul(page, 0, &lu_gp_id);
2181 if (ret < 0) {
2182 pr_err("kstrtoul() returned %d for"
2183 " lu_gp_id\n", ret);
2184 return ret;
2185 }
2186 if (lu_gp_id > 0x0000ffff) {
2187 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2188 " 0x0000ffff\n", lu_gp_id);
2189 return -EINVAL;
2190 }
2191
2192 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2193 if (ret < 0)
2194 return -EINVAL;
2195
2196 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2197 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2198 config_item_name(&alua_lu_gp_cg->cg_item),
2199 lu_gp->lu_gp_id);
2200
2201 return count;
2202 }
2203
2204 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2205 {
2206 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2207 struct se_device *dev;
2208 struct se_hba *hba;
2209 struct t10_alua_lu_gp_member *lu_gp_mem;
2210 ssize_t len = 0, cur_len;
2211 unsigned char buf[LU_GROUP_NAME_BUF];
2212
2213 memset(buf, 0, LU_GROUP_NAME_BUF);
2214
2215 spin_lock(&lu_gp->lu_gp_lock);
2216 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2217 dev = lu_gp_mem->lu_gp_mem_dev;
2218 hba = dev->se_hba;
2219
2220 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2221 config_item_name(&hba->hba_group.cg_item),
2222 config_item_name(&dev->dev_group.cg_item));
2223 cur_len++; /* Extra byte for NULL terminator */
2224
2225 if ((cur_len + len) > PAGE_SIZE) {
2226 pr_warn("Ran out of lu_gp_show_attr"
2227 "_members buffer\n");
2228 break;
2229 }
2230 memcpy(page+len, buf, cur_len);
2231 len += cur_len;
2232 }
2233 spin_unlock(&lu_gp->lu_gp_lock);
2234
2235 return len;
2236 }
2237
2238 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2239 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2240
2241 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2242 &target_lu_gp_attr_lu_gp_id,
2243 &target_lu_gp_attr_members,
2244 NULL,
2245 };
2246
2247 static void target_core_alua_lu_gp_release(struct config_item *item)
2248 {
2249 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2250 struct t10_alua_lu_gp, lu_gp_group);
2251
2252 core_alua_free_lu_gp(lu_gp);
2253 }
2254
2255 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2256 .release = target_core_alua_lu_gp_release,
2257 };
2258
2259 static struct config_item_type target_core_alua_lu_gp_cit = {
2260 .ct_item_ops = &target_core_alua_lu_gp_ops,
2261 .ct_attrs = target_core_alua_lu_gp_attrs,
2262 .ct_owner = THIS_MODULE,
2263 };
2264
2265 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2266
2267 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2268
2269 static struct config_group *target_core_alua_create_lu_gp(
2270 struct config_group *group,
2271 const char *name)
2272 {
2273 struct t10_alua_lu_gp *lu_gp;
2274 struct config_group *alua_lu_gp_cg = NULL;
2275 struct config_item *alua_lu_gp_ci = NULL;
2276
2277 lu_gp = core_alua_allocate_lu_gp(name, 0);
2278 if (IS_ERR(lu_gp))
2279 return NULL;
2280
2281 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2282 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2283
2284 config_group_init_type_name(alua_lu_gp_cg, name,
2285 &target_core_alua_lu_gp_cit);
2286
2287 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2288 " Group: core/alua/lu_gps/%s\n",
2289 config_item_name(alua_lu_gp_ci));
2290
2291 return alua_lu_gp_cg;
2292
2293 }
2294
2295 static void target_core_alua_drop_lu_gp(
2296 struct config_group *group,
2297 struct config_item *item)
2298 {
2299 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2300 struct t10_alua_lu_gp, lu_gp_group);
2301
2302 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2303 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2304 config_item_name(item), lu_gp->lu_gp_id);
2305 /*
2306 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2307 * -> target_core_alua_lu_gp_release()
2308 */
2309 config_item_put(item);
2310 }
2311
2312 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2313 .make_group = &target_core_alua_create_lu_gp,
2314 .drop_item = &target_core_alua_drop_lu_gp,
2315 };
2316
2317 static struct config_item_type target_core_alua_lu_gps_cit = {
2318 .ct_item_ops = NULL,
2319 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2320 .ct_owner = THIS_MODULE,
2321 };
2322
2323 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2324
2325 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2326
2327 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2328 {
2329 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2330 tg_pt_gp_group);
2331 }
2332
2333 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2334 char *page)
2335 {
2336 return sprintf(page, "%d\n",
2337 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state));
2338 }
2339
2340 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2341 const char *page, size_t count)
2342 {
2343 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2344 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2345 unsigned long tmp;
2346 int new_state, ret;
2347
2348 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2349 pr_err("Unable to do implicit ALUA on non valid"
2350 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2351 return -EINVAL;
2352 }
2353 if (!(dev->dev_flags & DF_CONFIGURED)) {
2354 pr_err("Unable to set alua_access_state while device is"
2355 " not configured\n");
2356 return -ENODEV;
2357 }
2358
2359 ret = kstrtoul(page, 0, &tmp);
2360 if (ret < 0) {
2361 pr_err("Unable to extract new ALUA access state from"
2362 " %s\n", page);
2363 return ret;
2364 }
2365 new_state = (int)tmp;
2366
2367 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2368 pr_err("Unable to process implicit configfs ALUA"
2369 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2370 return -EINVAL;
2371 }
2372 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2373 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2374 /* LBA DEPENDENT is only allowed with implicit ALUA */
2375 pr_err("Unable to process implicit configfs ALUA transition"
2376 " while explicit ALUA management is enabled\n");
2377 return -EINVAL;
2378 }
2379
2380 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2381 NULL, NULL, new_state, 0);
2382 return (!ret) ? count : -EINVAL;
2383 }
2384
2385 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2386 char *page)
2387 {
2388 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2389 return sprintf(page, "%s\n",
2390 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2391 }
2392
2393 static ssize_t target_tg_pt_gp_alua_access_status_store(
2394 struct config_item *item, const char *page, size_t count)
2395 {
2396 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2397 unsigned long tmp;
2398 int new_status, ret;
2399
2400 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2401 pr_err("Unable to do set ALUA access status on non"
2402 " valid tg_pt_gp ID: %hu\n",
2403 tg_pt_gp->tg_pt_gp_valid_id);
2404 return -EINVAL;
2405 }
2406
2407 ret = kstrtoul(page, 0, &tmp);
2408 if (ret < 0) {
2409 pr_err("Unable to extract new ALUA access status"
2410 " from %s\n", page);
2411 return ret;
2412 }
2413 new_status = (int)tmp;
2414
2415 if ((new_status != ALUA_STATUS_NONE) &&
2416 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2417 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2418 pr_err("Illegal ALUA access status: 0x%02x\n",
2419 new_status);
2420 return -EINVAL;
2421 }
2422
2423 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2424 return count;
2425 }
2426
2427 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2428 char *page)
2429 {
2430 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2431 }
2432
2433 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2434 const char *page, size_t count)
2435 {
2436 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2437 }
2438
2439 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2440 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2441 struct config_item *item, char *p) \
2442 { \
2443 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2444 return sprintf(p, "%d\n", \
2445 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2446 } \
2447 \
2448 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2449 struct config_item *item, const char *p, size_t c) \
2450 { \
2451 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2452 unsigned long tmp; \
2453 int ret; \
2454 \
2455 if (!t->tg_pt_gp_valid_id) { \
2456 pr_err("Unable to do set ##_name ALUA state on non" \
2457 " valid tg_pt_gp ID: %hu\n", \
2458 t->tg_pt_gp_valid_id); \
2459 return -EINVAL; \
2460 } \
2461 \
2462 ret = kstrtoul(p, 0, &tmp); \
2463 if (ret < 0) { \
2464 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2465 return -EINVAL; \
2466 } \
2467 if (tmp > 1) { \
2468 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2469 return -EINVAL; \
2470 } \
2471 if (tmp) \
2472 t->tg_pt_gp_alua_supported_states |= _bit; \
2473 else \
2474 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2475 \
2476 return c; \
2477 }
2478
2479 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2480 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2481 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2482 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2483 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2484 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2485 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2486
2487 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2488 struct config_item *item, char *page)
2489 {
2490 return sprintf(page, "%d\n",
2491 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2492 }
2493
2494 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2495 struct config_item *item, const char *page, size_t count)
2496 {
2497 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2498 unsigned long tmp;
2499 int ret;
2500
2501 ret = kstrtoul(page, 0, &tmp);
2502 if (ret < 0) {
2503 pr_err("Unable to extract alua_write_metadata\n");
2504 return ret;
2505 }
2506
2507 if ((tmp != 0) && (tmp != 1)) {
2508 pr_err("Illegal value for alua_write_metadata:"
2509 " %lu\n", tmp);
2510 return -EINVAL;
2511 }
2512 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2513
2514 return count;
2515 }
2516
2517 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2518 char *page)
2519 {
2520 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2521 }
2522
2523 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2524 const char *page, size_t count)
2525 {
2526 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2527 count);
2528 }
2529
2530 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2531 char *page)
2532 {
2533 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2534 }
2535
2536 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2537 const char *page, size_t count)
2538 {
2539 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2540 count);
2541 }
2542
2543 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2544 struct config_item *item, char *page)
2545 {
2546 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2547 }
2548
2549 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2550 struct config_item *item, const char *page, size_t count)
2551 {
2552 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2553 count);
2554 }
2555
2556 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2557 char *page)
2558 {
2559 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2560 }
2561
2562 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2563 const char *page, size_t count)
2564 {
2565 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2566 }
2567
2568 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2569 char *page)
2570 {
2571 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2572
2573 if (!tg_pt_gp->tg_pt_gp_valid_id)
2574 return 0;
2575 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2576 }
2577
2578 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2579 const char *page, size_t count)
2580 {
2581 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2582 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2583 unsigned long tg_pt_gp_id;
2584 int ret;
2585
2586 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2587 if (ret < 0) {
2588 pr_err("kstrtoul() returned %d for"
2589 " tg_pt_gp_id\n", ret);
2590 return ret;
2591 }
2592 if (tg_pt_gp_id > 0x0000ffff) {
2593 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2594 " 0x0000ffff\n", tg_pt_gp_id);
2595 return -EINVAL;
2596 }
2597
2598 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2599 if (ret < 0)
2600 return -EINVAL;
2601
2602 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2603 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2604 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2605 tg_pt_gp->tg_pt_gp_id);
2606
2607 return count;
2608 }
2609
2610 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2611 char *page)
2612 {
2613 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2614 struct se_lun *lun;
2615 ssize_t len = 0, cur_len;
2616 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2617
2618 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2619
2620 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2621 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2622 lun_tg_pt_gp_link) {
2623 struct se_portal_group *tpg = lun->lun_tpg;
2624
2625 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2626 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2627 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2628 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2629 config_item_name(&lun->lun_group.cg_item));
2630 cur_len++; /* Extra byte for NULL terminator */
2631
2632 if ((cur_len + len) > PAGE_SIZE) {
2633 pr_warn("Ran out of lu_gp_show_attr"
2634 "_members buffer\n");
2635 break;
2636 }
2637 memcpy(page+len, buf, cur_len);
2638 len += cur_len;
2639 }
2640 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2641
2642 return len;
2643 }
2644
2645 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2646 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2647 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2648 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2649 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2650 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2651 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2652 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2653 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2654 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2655 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2656 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2657 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2658 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2659 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2660 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2661 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2662
2663 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2664 &target_tg_pt_gp_attr_alua_access_state,
2665 &target_tg_pt_gp_attr_alua_access_status,
2666 &target_tg_pt_gp_attr_alua_access_type,
2667 &target_tg_pt_gp_attr_alua_support_transitioning,
2668 &target_tg_pt_gp_attr_alua_support_offline,
2669 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2670 &target_tg_pt_gp_attr_alua_support_unavailable,
2671 &target_tg_pt_gp_attr_alua_support_standby,
2672 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2673 &target_tg_pt_gp_attr_alua_support_active_optimized,
2674 &target_tg_pt_gp_attr_alua_write_metadata,
2675 &target_tg_pt_gp_attr_nonop_delay_msecs,
2676 &target_tg_pt_gp_attr_trans_delay_msecs,
2677 &target_tg_pt_gp_attr_implicit_trans_secs,
2678 &target_tg_pt_gp_attr_preferred,
2679 &target_tg_pt_gp_attr_tg_pt_gp_id,
2680 &target_tg_pt_gp_attr_members,
2681 NULL,
2682 };
2683
2684 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2685 {
2686 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2687 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2688
2689 core_alua_free_tg_pt_gp(tg_pt_gp);
2690 }
2691
2692 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2693 .release = target_core_alua_tg_pt_gp_release,
2694 };
2695
2696 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2697 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2698 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2699 .ct_owner = THIS_MODULE,
2700 };
2701
2702 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2703
2704 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2705
2706 static struct config_group *target_core_alua_create_tg_pt_gp(
2707 struct config_group *group,
2708 const char *name)
2709 {
2710 struct t10_alua *alua = container_of(group, struct t10_alua,
2711 alua_tg_pt_gps_group);
2712 struct t10_alua_tg_pt_gp *tg_pt_gp;
2713 struct config_group *alua_tg_pt_gp_cg = NULL;
2714 struct config_item *alua_tg_pt_gp_ci = NULL;
2715
2716 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2717 if (!tg_pt_gp)
2718 return NULL;
2719
2720 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2721 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2722
2723 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2724 &target_core_alua_tg_pt_gp_cit);
2725
2726 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2727 " Group: alua/tg_pt_gps/%s\n",
2728 config_item_name(alua_tg_pt_gp_ci));
2729
2730 return alua_tg_pt_gp_cg;
2731 }
2732
2733 static void target_core_alua_drop_tg_pt_gp(
2734 struct config_group *group,
2735 struct config_item *item)
2736 {
2737 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2738 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2739
2740 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2741 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2742 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2743 /*
2744 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2745 * -> target_core_alua_tg_pt_gp_release().
2746 */
2747 config_item_put(item);
2748 }
2749
2750 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2751 .make_group = &target_core_alua_create_tg_pt_gp,
2752 .drop_item = &target_core_alua_drop_tg_pt_gp,
2753 };
2754
2755 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2756
2757 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2758
2759 /* Start functions for struct config_item_type target_core_alua_cit */
2760
2761 /*
2762 * target_core_alua_cit is a ConfigFS group that lives under
2763 * /sys/kernel/config/target/core/alua. There are default groups
2764 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2765 * target_core_alua_cit in target_core_init_configfs() below.
2766 */
2767 static struct config_item_type target_core_alua_cit = {
2768 .ct_item_ops = NULL,
2769 .ct_attrs = NULL,
2770 .ct_owner = THIS_MODULE,
2771 };
2772
2773 /* End functions for struct config_item_type target_core_alua_cit */
2774
2775 /* Start functions for struct config_item_type tb_dev_stat_cit */
2776
2777 static struct config_group *target_core_stat_mkdir(
2778 struct config_group *group,
2779 const char *name)
2780 {
2781 return ERR_PTR(-ENOSYS);
2782 }
2783
2784 static void target_core_stat_rmdir(
2785 struct config_group *group,
2786 struct config_item *item)
2787 {
2788 return;
2789 }
2790
2791 static struct configfs_group_operations target_core_stat_group_ops = {
2792 .make_group = &target_core_stat_mkdir,
2793 .drop_item = &target_core_stat_rmdir,
2794 };
2795
2796 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2797
2798 /* End functions for struct config_item_type tb_dev_stat_cit */
2799
2800 /* Start functions for struct config_item_type target_core_hba_cit */
2801
2802 static struct config_group *target_core_make_subdev(
2803 struct config_group *group,
2804 const char *name)
2805 {
2806 struct t10_alua_tg_pt_gp *tg_pt_gp;
2807 struct config_item *hba_ci = &group->cg_item;
2808 struct se_hba *hba = item_to_hba(hba_ci);
2809 struct target_backend *tb = hba->backend;
2810 struct se_device *dev;
2811 int errno = -ENOMEM, ret;
2812
2813 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2814 if (ret)
2815 return ERR_PTR(ret);
2816
2817 dev = target_alloc_device(hba, name);
2818 if (!dev)
2819 goto out_unlock;
2820
2821 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2822
2823 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2824 &tb->tb_dev_attrib_cit);
2825 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2826
2827 config_group_init_type_name(&dev->dev_pr_group, "pr",
2828 &tb->tb_dev_pr_cit);
2829 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2830
2831 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2832 &tb->tb_dev_wwn_cit);
2833 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2834 &dev->dev_group);
2835
2836 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2837 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2838 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2839 &dev->dev_group);
2840
2841 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2842 "statistics", &tb->tb_dev_stat_cit);
2843 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2844 &dev->dev_group);
2845
2846 /*
2847 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2848 */
2849 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2850 if (!tg_pt_gp)
2851 goto out_free_device;
2852 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2853
2854 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2855 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2856 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2857 &dev->t10_alua.alua_tg_pt_gps_group);
2858
2859 /*
2860 * Add core/$HBA/$DEV/statistics/ default groups
2861 */
2862 target_stat_setup_dev_default_groups(dev);
2863
2864 mutex_unlock(&hba->hba_access_mutex);
2865 return &dev->dev_group;
2866
2867 out_free_device:
2868 target_free_device(dev);
2869 out_unlock:
2870 mutex_unlock(&hba->hba_access_mutex);
2871 return ERR_PTR(errno);
2872 }
2873
2874 static void target_core_drop_subdev(
2875 struct config_group *group,
2876 struct config_item *item)
2877 {
2878 struct config_group *dev_cg = to_config_group(item);
2879 struct se_device *dev =
2880 container_of(dev_cg, struct se_device, dev_group);
2881 struct se_hba *hba;
2882
2883 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2884
2885 mutex_lock(&hba->hba_access_mutex);
2886
2887 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
2888 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
2889
2890 /*
2891 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2892 * directly from target_core_alua_tg_pt_gp_release().
2893 */
2894 dev->t10_alua.default_tg_pt_gp = NULL;
2895
2896 configfs_remove_default_groups(dev_cg);
2897
2898 /*
2899 * se_dev is released from target_core_dev_item_ops->release()
2900 */
2901 config_item_put(item);
2902 mutex_unlock(&hba->hba_access_mutex);
2903 }
2904
2905 static struct configfs_group_operations target_core_hba_group_ops = {
2906 .make_group = target_core_make_subdev,
2907 .drop_item = target_core_drop_subdev,
2908 };
2909
2910
2911 static inline struct se_hba *to_hba(struct config_item *item)
2912 {
2913 return container_of(to_config_group(item), struct se_hba, hba_group);
2914 }
2915
2916 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2917 {
2918 struct se_hba *hba = to_hba(item);
2919
2920 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2921 hba->hba_id, hba->backend->ops->name,
2922 TARGET_CORE_VERSION);
2923 }
2924
2925 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2926 {
2927 struct se_hba *hba = to_hba(item);
2928 int hba_mode = 0;
2929
2930 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2931 hba_mode = 1;
2932
2933 return sprintf(page, "%d\n", hba_mode);
2934 }
2935
2936 static ssize_t target_hba_mode_store(struct config_item *item,
2937 const char *page, size_t count)
2938 {
2939 struct se_hba *hba = to_hba(item);
2940 unsigned long mode_flag;
2941 int ret;
2942
2943 if (hba->backend->ops->pmode_enable_hba == NULL)
2944 return -EINVAL;
2945
2946 ret = kstrtoul(page, 0, &mode_flag);
2947 if (ret < 0) {
2948 pr_err("Unable to extract hba mode flag: %d\n", ret);
2949 return ret;
2950 }
2951
2952 if (hba->dev_count) {
2953 pr_err("Unable to set hba_mode with active devices\n");
2954 return -EINVAL;
2955 }
2956
2957 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
2958 if (ret < 0)
2959 return -EINVAL;
2960 if (ret > 0)
2961 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
2962 else if (ret == 0)
2963 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
2964
2965 return count;
2966 }
2967
2968 CONFIGFS_ATTR_RO(target_, hba_info);
2969 CONFIGFS_ATTR(target_, hba_mode);
2970
2971 static void target_core_hba_release(struct config_item *item)
2972 {
2973 struct se_hba *hba = container_of(to_config_group(item),
2974 struct se_hba, hba_group);
2975 core_delete_hba(hba);
2976 }
2977
2978 static struct configfs_attribute *target_core_hba_attrs[] = {
2979 &target_attr_hba_info,
2980 &target_attr_hba_mode,
2981 NULL,
2982 };
2983
2984 static struct configfs_item_operations target_core_hba_item_ops = {
2985 .release = target_core_hba_release,
2986 };
2987
2988 static struct config_item_type target_core_hba_cit = {
2989 .ct_item_ops = &target_core_hba_item_ops,
2990 .ct_group_ops = &target_core_hba_group_ops,
2991 .ct_attrs = target_core_hba_attrs,
2992 .ct_owner = THIS_MODULE,
2993 };
2994
2995 static struct config_group *target_core_call_addhbatotarget(
2996 struct config_group *group,
2997 const char *name)
2998 {
2999 char *se_plugin_str, *str, *str2;
3000 struct se_hba *hba;
3001 char buf[TARGET_CORE_NAME_MAX_LEN];
3002 unsigned long plugin_dep_id = 0;
3003 int ret;
3004
3005 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3006 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3007 pr_err("Passed *name strlen(): %d exceeds"
3008 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3009 TARGET_CORE_NAME_MAX_LEN);
3010 return ERR_PTR(-ENAMETOOLONG);
3011 }
3012 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3013
3014 str = strstr(buf, "_");
3015 if (!str) {
3016 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3017 return ERR_PTR(-EINVAL);
3018 }
3019 se_plugin_str = buf;
3020 /*
3021 * Special case for subsystem plugins that have "_" in their names.
3022 * Namely rd_direct and rd_mcp..
3023 */
3024 str2 = strstr(str+1, "_");
3025 if (str2) {
3026 *str2 = '\0'; /* Terminate for *se_plugin_str */
3027 str2++; /* Skip to start of plugin dependent ID */
3028 str = str2;
3029 } else {
3030 *str = '\0'; /* Terminate for *se_plugin_str */
3031 str++; /* Skip to start of plugin dependent ID */
3032 }
3033
3034 ret = kstrtoul(str, 0, &plugin_dep_id);
3035 if (ret < 0) {
3036 pr_err("kstrtoul() returned %d for"
3037 " plugin_dep_id\n", ret);
3038 return ERR_PTR(ret);
3039 }
3040 /*
3041 * Load up TCM subsystem plugins if they have not already been loaded.
3042 */
3043 transport_subsystem_check_init();
3044
3045 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3046 if (IS_ERR(hba))
3047 return ERR_CAST(hba);
3048
3049 config_group_init_type_name(&hba->hba_group, name,
3050 &target_core_hba_cit);
3051
3052 return &hba->hba_group;
3053 }
3054
3055 static void target_core_call_delhbafromtarget(
3056 struct config_group *group,
3057 struct config_item *item)
3058 {
3059 /*
3060 * core_delete_hba() is called from target_core_hba_item_ops->release()
3061 * -> target_core_hba_release()
3062 */
3063 config_item_put(item);
3064 }
3065
3066 static struct configfs_group_operations target_core_group_ops = {
3067 .make_group = target_core_call_addhbatotarget,
3068 .drop_item = target_core_call_delhbafromtarget,
3069 };
3070
3071 static struct config_item_type target_core_cit = {
3072 .ct_item_ops = NULL,
3073 .ct_group_ops = &target_core_group_ops,
3074 .ct_attrs = NULL,
3075 .ct_owner = THIS_MODULE,
3076 };
3077
3078 /* Stop functions for struct config_item_type target_core_hba_cit */
3079
3080 void target_setup_backend_cits(struct target_backend *tb)
3081 {
3082 target_core_setup_dev_cit(tb);
3083 target_core_setup_dev_attrib_cit(tb);
3084 target_core_setup_dev_pr_cit(tb);
3085 target_core_setup_dev_wwn_cit(tb);
3086 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3087 target_core_setup_dev_stat_cit(tb);
3088 }
3089
3090 static int __init target_core_init_configfs(void)
3091 {
3092 struct configfs_subsystem *subsys = &target_core_fabrics;
3093 struct t10_alua_lu_gp *lu_gp;
3094 int ret;
3095
3096 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3097 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3098 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3099
3100 config_group_init(&subsys->su_group);
3101 mutex_init(&subsys->su_mutex);
3102
3103 ret = init_se_kmem_caches();
3104 if (ret < 0)
3105 return ret;
3106 /*
3107 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3108 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3109 */
3110 config_group_init_type_name(&target_core_hbagroup, "core",
3111 &target_core_cit);
3112 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3113
3114 /*
3115 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3116 */
3117 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3118 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3119
3120 /*
3121 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3122 * groups under /sys/kernel/config/target/core/alua/
3123 */
3124 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3125 &target_core_alua_lu_gps_cit);
3126 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3127
3128 /*
3129 * Add core/alua/lu_gps/default_lu_gp
3130 */
3131 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3132 if (IS_ERR(lu_gp)) {
3133 ret = -ENOMEM;
3134 goto out_global;
3135 }
3136
3137 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3138 &target_core_alua_lu_gp_cit);
3139 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3140
3141 default_lu_gp = lu_gp;
3142
3143 /*
3144 * Register the target_core_mod subsystem with configfs.
3145 */
3146 ret = configfs_register_subsystem(subsys);
3147 if (ret < 0) {
3148 pr_err("Error %d while registering subsystem %s\n",
3149 ret, subsys->su_group.cg_item.ci_namebuf);
3150 goto out_global;
3151 }
3152 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3153 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3154 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3155 /*
3156 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3157 */
3158 ret = rd_module_init();
3159 if (ret < 0)
3160 goto out;
3161
3162 ret = core_dev_setup_virtual_lun0();
3163 if (ret < 0)
3164 goto out;
3165
3166 ret = target_xcopy_setup_pt();
3167 if (ret < 0)
3168 goto out;
3169
3170 return 0;
3171
3172 out:
3173 configfs_unregister_subsystem(subsys);
3174 core_dev_release_virtual_lun0();
3175 rd_module_exit();
3176 out_global:
3177 if (default_lu_gp) {
3178 core_alua_free_lu_gp(default_lu_gp);
3179 default_lu_gp = NULL;
3180 }
3181 release_se_kmem_caches();
3182 return ret;
3183 }
3184
3185 static void __exit target_core_exit_configfs(void)
3186 {
3187 configfs_remove_default_groups(&alua_lu_gps_group);
3188 configfs_remove_default_groups(&alua_group);
3189 configfs_remove_default_groups(&target_core_hbagroup);
3190
3191 /*
3192 * We expect subsys->su_group.default_groups to be released
3193 * by configfs subsystem provider logic..
3194 */
3195 configfs_unregister_subsystem(&target_core_fabrics);
3196
3197 core_alua_free_lu_gp(default_lu_gp);
3198 default_lu_gp = NULL;
3199
3200 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3201 " Infrastructure\n");
3202
3203 core_dev_release_virtual_lun0();
3204 rd_module_exit();
3205 target_xcopy_release_pt();
3206 release_se_kmem_caches();
3207 }
3208
3209 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3210 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3211 MODULE_LICENSE("GPL");
3212
3213 module_init(target_core_init_configfs);
3214 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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