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target/sbc: Add LBPRZ attribute + control CDB emulation
[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 tf->tf_group.default_groups = tf->tf_default_groups;
198 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
199 tf->tf_group.default_groups[1] = NULL;
200
201 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
202 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
203 &tf->tf_discovery_cit);
204
205 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
206 " %s\n", tf->tf_group.cg_item.ci_name);
207 return &tf->tf_group;
208 }
209
210 /*
211 * Called from struct target_core_group_ops->drop_item()
212 */
213 static void target_core_deregister_fabric(
214 struct config_group *group,
215 struct config_item *item)
216 {
217 struct target_fabric_configfs *tf = container_of(
218 to_config_group(item), struct target_fabric_configfs, tf_group);
219 struct config_group *tf_group;
220 struct config_item *df_item;
221 int i;
222
223 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
224 " tf list\n", config_item_name(item));
225
226 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
227 " %s\n", tf->tf_ops->name);
228 atomic_dec(&tf->tf_access_cnt);
229
230 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
231 " %s\n", config_item_name(item));
232
233 tf_group = &tf->tf_group;
234 for (i = 0; tf_group->default_groups[i]; i++) {
235 df_item = &tf_group->default_groups[i]->cg_item;
236 tf_group->default_groups[i] = NULL;
237 config_item_put(df_item);
238 }
239 config_item_put(item);
240 }
241
242 static struct configfs_group_operations target_core_fabric_group_ops = {
243 .make_group = &target_core_register_fabric,
244 .drop_item = &target_core_deregister_fabric,
245 };
246
247 /*
248 * All item attributes appearing in /sys/kernel/target/ appear here.
249 */
250 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
251 &target_core_item_attr_version,
252 NULL,
253 };
254
255 /*
256 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
257 */
258 static struct config_item_type target_core_fabrics_item = {
259 .ct_group_ops = &target_core_fabric_group_ops,
260 .ct_attrs = target_core_fabric_item_attrs,
261 .ct_owner = THIS_MODULE,
262 };
263
264 static struct configfs_subsystem target_core_fabrics = {
265 .su_group = {
266 .cg_item = {
267 .ci_namebuf = "target",
268 .ci_type = &target_core_fabrics_item,
269 },
270 },
271 };
272
273 int target_depend_item(struct config_item *item)
274 {
275 return configfs_depend_item(&target_core_fabrics, item);
276 }
277 EXPORT_SYMBOL(target_depend_item);
278
279 void target_undepend_item(struct config_item *item)
280 {
281 return configfs_undepend_item(item);
282 }
283 EXPORT_SYMBOL(target_undepend_item);
284
285 /*##############################################################################
286 // Start functions called by external Target Fabrics Modules
287 //############################################################################*/
288
289 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
290 {
291 if (!tfo->name) {
292 pr_err("Missing tfo->name\n");
293 return -EINVAL;
294 }
295 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
296 pr_err("Passed name: %s exceeds TARGET_FABRIC"
297 "_NAME_SIZE\n", tfo->name);
298 return -EINVAL;
299 }
300 if (!tfo->get_fabric_name) {
301 pr_err("Missing tfo->get_fabric_name()\n");
302 return -EINVAL;
303 }
304 if (!tfo->tpg_get_wwn) {
305 pr_err("Missing tfo->tpg_get_wwn()\n");
306 return -EINVAL;
307 }
308 if (!tfo->tpg_get_tag) {
309 pr_err("Missing tfo->tpg_get_tag()\n");
310 return -EINVAL;
311 }
312 if (!tfo->tpg_check_demo_mode) {
313 pr_err("Missing tfo->tpg_check_demo_mode()\n");
314 return -EINVAL;
315 }
316 if (!tfo->tpg_check_demo_mode_cache) {
317 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
318 return -EINVAL;
319 }
320 if (!tfo->tpg_check_demo_mode_write_protect) {
321 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
322 return -EINVAL;
323 }
324 if (!tfo->tpg_check_prod_mode_write_protect) {
325 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
326 return -EINVAL;
327 }
328 if (!tfo->tpg_get_inst_index) {
329 pr_err("Missing tfo->tpg_get_inst_index()\n");
330 return -EINVAL;
331 }
332 if (!tfo->release_cmd) {
333 pr_err("Missing tfo->release_cmd()\n");
334 return -EINVAL;
335 }
336 if (!tfo->shutdown_session) {
337 pr_err("Missing tfo->shutdown_session()\n");
338 return -EINVAL;
339 }
340 if (!tfo->close_session) {
341 pr_err("Missing tfo->close_session()\n");
342 return -EINVAL;
343 }
344 if (!tfo->sess_get_index) {
345 pr_err("Missing tfo->sess_get_index()\n");
346 return -EINVAL;
347 }
348 if (!tfo->write_pending) {
349 pr_err("Missing tfo->write_pending()\n");
350 return -EINVAL;
351 }
352 if (!tfo->write_pending_status) {
353 pr_err("Missing tfo->write_pending_status()\n");
354 return -EINVAL;
355 }
356 if (!tfo->set_default_node_attributes) {
357 pr_err("Missing tfo->set_default_node_attributes()\n");
358 return -EINVAL;
359 }
360 if (!tfo->get_cmd_state) {
361 pr_err("Missing tfo->get_cmd_state()\n");
362 return -EINVAL;
363 }
364 if (!tfo->queue_data_in) {
365 pr_err("Missing tfo->queue_data_in()\n");
366 return -EINVAL;
367 }
368 if (!tfo->queue_status) {
369 pr_err("Missing tfo->queue_status()\n");
370 return -EINVAL;
371 }
372 if (!tfo->queue_tm_rsp) {
373 pr_err("Missing tfo->queue_tm_rsp()\n");
374 return -EINVAL;
375 }
376 if (!tfo->aborted_task) {
377 pr_err("Missing tfo->aborted_task()\n");
378 return -EINVAL;
379 }
380 /*
381 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
382 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
383 * target_core_fabric_configfs.c WWN+TPG group context code.
384 */
385 if (!tfo->fabric_make_wwn) {
386 pr_err("Missing tfo->fabric_make_wwn()\n");
387 return -EINVAL;
388 }
389 if (!tfo->fabric_drop_wwn) {
390 pr_err("Missing tfo->fabric_drop_wwn()\n");
391 return -EINVAL;
392 }
393 if (!tfo->fabric_make_tpg) {
394 pr_err("Missing tfo->fabric_make_tpg()\n");
395 return -EINVAL;
396 }
397 if (!tfo->fabric_drop_tpg) {
398 pr_err("Missing tfo->fabric_drop_tpg()\n");
399 return -EINVAL;
400 }
401
402 return 0;
403 }
404
405 int target_register_template(const struct target_core_fabric_ops *fo)
406 {
407 struct target_fabric_configfs *tf;
408 int ret;
409
410 ret = target_fabric_tf_ops_check(fo);
411 if (ret)
412 return ret;
413
414 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
415 if (!tf) {
416 pr_err("%s: could not allocate memory!\n", __func__);
417 return -ENOMEM;
418 }
419
420 INIT_LIST_HEAD(&tf->tf_list);
421 atomic_set(&tf->tf_access_cnt, 0);
422 tf->tf_ops = fo;
423 target_fabric_setup_cits(tf);
424
425 mutex_lock(&g_tf_lock);
426 list_add_tail(&tf->tf_list, &g_tf_list);
427 mutex_unlock(&g_tf_lock);
428
429 return 0;
430 }
431 EXPORT_SYMBOL(target_register_template);
432
433 void target_unregister_template(const struct target_core_fabric_ops *fo)
434 {
435 struct target_fabric_configfs *t;
436
437 mutex_lock(&g_tf_lock);
438 list_for_each_entry(t, &g_tf_list, tf_list) {
439 if (!strcmp(t->tf_ops->name, fo->name)) {
440 BUG_ON(atomic_read(&t->tf_access_cnt));
441 list_del(&t->tf_list);
442 mutex_unlock(&g_tf_lock);
443 /*
444 * Wait for any outstanding fabric se_deve_entry->rcu_head
445 * callbacks to complete post kfree_rcu(), before allowing
446 * fabric driver unload of TFO->module to proceed.
447 */
448 rcu_barrier();
449 kfree(t);
450 return;
451 }
452 }
453 mutex_unlock(&g_tf_lock);
454 }
455 EXPORT_SYMBOL(target_unregister_template);
456
457 /*##############################################################################
458 // Stop functions called by external Target Fabrics Modules
459 //############################################################################*/
460
461 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
462 {
463 return container_of(to_config_group(item), struct se_dev_attrib,
464 da_group);
465 }
466
467 /* Start functions for struct config_item_type tb_dev_attrib_cit */
468 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
469 static ssize_t _name##_show(struct config_item *item, char *page) \
470 { \
471 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
472 }
473
474 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
475 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
476 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
477 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
478 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
479 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
480 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
481 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
482 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
483 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
484 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
485 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
486 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
487 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
488 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
489 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
490 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
491 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
492 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
493 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
494 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
495 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
496 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
497 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
498 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
499 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
500 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
501 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
502 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
503 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
504
505 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
506 static ssize_t _name##_store(struct config_item *item, const char *page,\
507 size_t count) \
508 { \
509 struct se_dev_attrib *da = to_attrib(item); \
510 u32 val; \
511 int ret; \
512 \
513 ret = kstrtou32(page, 0, &val); \
514 if (ret < 0) \
515 return ret; \
516 da->_name = val; \
517 return count; \
518 }
519
520 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
521 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
522 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
523 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
524 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
525
526 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
527 static ssize_t _name##_store(struct config_item *item, const char *page, \
528 size_t count) \
529 { \
530 struct se_dev_attrib *da = to_attrib(item); \
531 bool flag; \
532 int ret; \
533 \
534 ret = strtobool(page, &flag); \
535 if (ret < 0) \
536 return ret; \
537 da->_name = flag; \
538 return count; \
539 }
540
541 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
542 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
543 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
544 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
545 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
546
547 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
548 static ssize_t _name##_store(struct config_item *item, const char *page,\
549 size_t count) \
550 { \
551 printk_once(KERN_WARNING \
552 "ignoring deprecated ##_name## attribute\n"); \
553 return count; \
554 }
555
556 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
557 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
558
559 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
560 {
561 const char *configname;
562
563 configname = config_item_name(&dev->dev_group.cg_item);
564 if (strlen(configname) >= 16) {
565 pr_warn("dev[%p]: Backstore name '%s' is too long for "
566 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
567 configname);
568 }
569 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
570 }
571
572 static ssize_t emulate_model_alias_store(struct config_item *item,
573 const char *page, size_t count)
574 {
575 struct se_dev_attrib *da = to_attrib(item);
576 struct se_device *dev = da->da_dev;
577 bool flag;
578 int ret;
579
580 if (dev->export_count) {
581 pr_err("dev[%p]: Unable to change model alias"
582 " while export_count is %d\n",
583 dev, dev->export_count);
584 return -EINVAL;
585 }
586
587 ret = strtobool(page, &flag);
588 if (ret < 0)
589 return ret;
590
591 if (flag) {
592 dev_set_t10_wwn_model_alias(dev);
593 } else {
594 strncpy(&dev->t10_wwn.model[0],
595 dev->transport->inquiry_prod, 16);
596 }
597 da->emulate_model_alias = flag;
598 return count;
599 }
600
601 static ssize_t emulate_write_cache_store(struct config_item *item,
602 const char *page, size_t count)
603 {
604 struct se_dev_attrib *da = to_attrib(item);
605 bool flag;
606 int ret;
607
608 ret = strtobool(page, &flag);
609 if (ret < 0)
610 return ret;
611
612 if (flag && da->da_dev->transport->get_write_cache) {
613 pr_err("emulate_write_cache not supported for this device\n");
614 return -EINVAL;
615 }
616
617 da->emulate_write_cache = flag;
618 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
619 da->da_dev, flag);
620 return count;
621 }
622
623 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
624 const char *page, size_t count)
625 {
626 struct se_dev_attrib *da = to_attrib(item);
627 u32 val;
628 int ret;
629
630 ret = kstrtou32(page, 0, &val);
631 if (ret < 0)
632 return ret;
633
634 if (val != 0 && val != 1 && val != 2) {
635 pr_err("Illegal value %d\n", val);
636 return -EINVAL;
637 }
638
639 if (da->da_dev->export_count) {
640 pr_err("dev[%p]: Unable to change SE Device"
641 " UA_INTRLCK_CTRL while export_count is %d\n",
642 da->da_dev, da->da_dev->export_count);
643 return -EINVAL;
644 }
645 da->emulate_ua_intlck_ctrl = val;
646 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
647 da->da_dev, val);
648 return count;
649 }
650
651 static ssize_t emulate_tas_store(struct config_item *item,
652 const char *page, size_t count)
653 {
654 struct se_dev_attrib *da = to_attrib(item);
655 bool flag;
656 int ret;
657
658 ret = strtobool(page, &flag);
659 if (ret < 0)
660 return ret;
661
662 if (da->da_dev->export_count) {
663 pr_err("dev[%p]: Unable to change SE Device TAS while"
664 " export_count is %d\n",
665 da->da_dev, da->da_dev->export_count);
666 return -EINVAL;
667 }
668 da->emulate_tas = flag;
669 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
670 da->da_dev, flag ? "Enabled" : "Disabled");
671
672 return count;
673 }
674
675 static ssize_t emulate_tpu_store(struct config_item *item,
676 const char *page, size_t count)
677 {
678 struct se_dev_attrib *da = to_attrib(item);
679 bool flag;
680 int ret;
681
682 ret = strtobool(page, &flag);
683 if (ret < 0)
684 return ret;
685
686 /*
687 * We expect this value to be non-zero when generic Block Layer
688 * Discard supported is detected iblock_create_virtdevice().
689 */
690 if (flag && !da->max_unmap_block_desc_count) {
691 pr_err("Generic Block Discard not supported\n");
692 return -ENOSYS;
693 }
694
695 da->emulate_tpu = flag;
696 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
697 da->da_dev, flag);
698 return count;
699 }
700
701 static ssize_t emulate_tpws_store(struct config_item *item,
702 const char *page, size_t count)
703 {
704 struct se_dev_attrib *da = to_attrib(item);
705 bool flag;
706 int ret;
707
708 ret = strtobool(page, &flag);
709 if (ret < 0)
710 return ret;
711
712 /*
713 * We expect this value to be non-zero when generic Block Layer
714 * Discard supported is detected iblock_create_virtdevice().
715 */
716 if (flag && !da->max_unmap_block_desc_count) {
717 pr_err("Generic Block Discard not supported\n");
718 return -ENOSYS;
719 }
720
721 da->emulate_tpws = flag;
722 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
723 da->da_dev, flag);
724 return count;
725 }
726
727 static ssize_t pi_prot_type_store(struct config_item *item,
728 const char *page, size_t count)
729 {
730 struct se_dev_attrib *da = to_attrib(item);
731 int old_prot = da->pi_prot_type, ret;
732 struct se_device *dev = da->da_dev;
733 u32 flag;
734
735 ret = kstrtou32(page, 0, &flag);
736 if (ret < 0)
737 return ret;
738
739 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
740 pr_err("Illegal value %d for pi_prot_type\n", flag);
741 return -EINVAL;
742 }
743 if (flag == 2) {
744 pr_err("DIF TYPE2 protection currently not supported\n");
745 return -ENOSYS;
746 }
747 if (da->hw_pi_prot_type) {
748 pr_warn("DIF protection enabled on underlying hardware,"
749 " ignoring\n");
750 return count;
751 }
752 if (!dev->transport->init_prot || !dev->transport->free_prot) {
753 /* 0 is only allowed value for non-supporting backends */
754 if (flag == 0)
755 return count;
756
757 pr_err("DIF protection not supported by backend: %s\n",
758 dev->transport->name);
759 return -ENOSYS;
760 }
761 if (!(dev->dev_flags & DF_CONFIGURED)) {
762 pr_err("DIF protection requires device to be configured\n");
763 return -ENODEV;
764 }
765 if (dev->export_count) {
766 pr_err("dev[%p]: Unable to change SE Device PROT type while"
767 " export_count is %d\n", dev, dev->export_count);
768 return -EINVAL;
769 }
770
771 da->pi_prot_type = flag;
772
773 if (flag && !old_prot) {
774 ret = dev->transport->init_prot(dev);
775 if (ret) {
776 da->pi_prot_type = old_prot;
777 return ret;
778 }
779
780 } else if (!flag && old_prot) {
781 dev->transport->free_prot(dev);
782 }
783
784 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
785 return count;
786 }
787
788 static ssize_t pi_prot_format_store(struct config_item *item,
789 const char *page, size_t count)
790 {
791 struct se_dev_attrib *da = to_attrib(item);
792 struct se_device *dev = da->da_dev;
793 bool flag;
794 int ret;
795
796 ret = strtobool(page, &flag);
797 if (ret < 0)
798 return ret;
799
800 if (!flag)
801 return count;
802
803 if (!dev->transport->format_prot) {
804 pr_err("DIF protection format not supported by backend %s\n",
805 dev->transport->name);
806 return -ENOSYS;
807 }
808 if (!(dev->dev_flags & DF_CONFIGURED)) {
809 pr_err("DIF protection format requires device to be configured\n");
810 return -ENODEV;
811 }
812 if (dev->export_count) {
813 pr_err("dev[%p]: Unable to format SE Device PROT type while"
814 " export_count is %d\n", dev, dev->export_count);
815 return -EINVAL;
816 }
817
818 ret = dev->transport->format_prot(dev);
819 if (ret)
820 return ret;
821
822 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
823 return count;
824 }
825
826 static ssize_t force_pr_aptpl_store(struct config_item *item,
827 const char *page, size_t count)
828 {
829 struct se_dev_attrib *da = to_attrib(item);
830 bool flag;
831 int ret;
832
833 ret = strtobool(page, &flag);
834 if (ret < 0)
835 return ret;
836 if (da->da_dev->export_count) {
837 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
838 " export_count is %d\n",
839 da->da_dev, da->da_dev->export_count);
840 return -EINVAL;
841 }
842
843 da->force_pr_aptpl = flag;
844 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
845 return count;
846 }
847
848 static ssize_t emulate_rest_reord_store(struct config_item *item,
849 const char *page, size_t count)
850 {
851 struct se_dev_attrib *da = to_attrib(item);
852 bool flag;
853 int ret;
854
855 ret = strtobool(page, &flag);
856 if (ret < 0)
857 return ret;
858
859 if (flag != 0) {
860 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
861 " reordering not implemented\n", da->da_dev);
862 return -ENOSYS;
863 }
864 da->emulate_rest_reord = flag;
865 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
866 da->da_dev, flag);
867 return count;
868 }
869
870 static ssize_t unmap_zeroes_data_store(struct config_item *item,
871 const char *page, size_t count)
872 {
873 struct se_dev_attrib *da = to_attrib(item);
874 bool flag;
875 int ret;
876
877 ret = strtobool(page, &flag);
878 if (ret < 0)
879 return ret;
880
881 if (da->da_dev->export_count) {
882 pr_err("dev[%p]: Unable to change SE Device"
883 " unmap_zeroes_data while export_count is %d\n",
884 da->da_dev, da->da_dev->export_count);
885 return -EINVAL;
886 }
887 /*
888 * We expect this value to be non-zero when generic Block Layer
889 * Discard supported is detected iblock_configure_device().
890 */
891 if (flag && !da->max_unmap_block_desc_count) {
892 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
893 " because max_unmap_block_desc_count is zero\n",
894 da->da_dev);
895 return -ENOSYS;
896 }
897 da->unmap_zeroes_data = flag;
898 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
899 da->da_dev, flag);
900 return 0;
901 }
902
903 /*
904 * Note, this can only be called on unexported SE Device Object.
905 */
906 static ssize_t queue_depth_store(struct config_item *item,
907 const char *page, size_t count)
908 {
909 struct se_dev_attrib *da = to_attrib(item);
910 struct se_device *dev = da->da_dev;
911 u32 val;
912 int ret;
913
914 ret = kstrtou32(page, 0, &val);
915 if (ret < 0)
916 return ret;
917
918 if (dev->export_count) {
919 pr_err("dev[%p]: Unable to change SE Device TCQ while"
920 " export_count is %d\n",
921 dev, dev->export_count);
922 return -EINVAL;
923 }
924 if (!val) {
925 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
926 return -EINVAL;
927 }
928
929 if (val > dev->dev_attrib.queue_depth) {
930 if (val > dev->dev_attrib.hw_queue_depth) {
931 pr_err("dev[%p]: Passed queue_depth:"
932 " %u exceeds TCM/SE_Device MAX"
933 " TCQ: %u\n", dev, val,
934 dev->dev_attrib.hw_queue_depth);
935 return -EINVAL;
936 }
937 }
938 da->queue_depth = dev->queue_depth = val;
939 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
940 return count;
941 }
942
943 static ssize_t optimal_sectors_store(struct config_item *item,
944 const char *page, size_t count)
945 {
946 struct se_dev_attrib *da = to_attrib(item);
947 u32 val;
948 int ret;
949
950 ret = kstrtou32(page, 0, &val);
951 if (ret < 0)
952 return ret;
953
954 if (da->da_dev->export_count) {
955 pr_err("dev[%p]: Unable to change SE Device"
956 " optimal_sectors while export_count is %d\n",
957 da->da_dev, da->da_dev->export_count);
958 return -EINVAL;
959 }
960 if (val > da->hw_max_sectors) {
961 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
962 " greater than hw_max_sectors: %u\n",
963 da->da_dev, val, da->hw_max_sectors);
964 return -EINVAL;
965 }
966
967 da->optimal_sectors = val;
968 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
969 da->da_dev, val);
970 return count;
971 }
972
973 static ssize_t block_size_store(struct config_item *item,
974 const char *page, size_t count)
975 {
976 struct se_dev_attrib *da = to_attrib(item);
977 u32 val;
978 int ret;
979
980 ret = kstrtou32(page, 0, &val);
981 if (ret < 0)
982 return ret;
983
984 if (da->da_dev->export_count) {
985 pr_err("dev[%p]: Unable to change SE Device block_size"
986 " while export_count is %d\n",
987 da->da_dev, da->da_dev->export_count);
988 return -EINVAL;
989 }
990
991 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
992 pr_err("dev[%p]: Illegal value for block_device: %u"
993 " for SE device, must be 512, 1024, 2048 or 4096\n",
994 da->da_dev, val);
995 return -EINVAL;
996 }
997
998 da->block_size = val;
999 if (da->max_bytes_per_io)
1000 da->hw_max_sectors = da->max_bytes_per_io / val;
1001
1002 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1003 da->da_dev, val);
1004 return count;
1005 }
1006
1007 CONFIGFS_ATTR(, emulate_model_alias);
1008 CONFIGFS_ATTR(, emulate_dpo);
1009 CONFIGFS_ATTR(, emulate_fua_write);
1010 CONFIGFS_ATTR(, emulate_fua_read);
1011 CONFIGFS_ATTR(, emulate_write_cache);
1012 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1013 CONFIGFS_ATTR(, emulate_tas);
1014 CONFIGFS_ATTR(, emulate_tpu);
1015 CONFIGFS_ATTR(, emulate_tpws);
1016 CONFIGFS_ATTR(, emulate_caw);
1017 CONFIGFS_ATTR(, emulate_3pc);
1018 CONFIGFS_ATTR(, pi_prot_type);
1019 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1020 CONFIGFS_ATTR(, pi_prot_format);
1021 CONFIGFS_ATTR(, enforce_pr_isids);
1022 CONFIGFS_ATTR(, is_nonrot);
1023 CONFIGFS_ATTR(, emulate_rest_reord);
1024 CONFIGFS_ATTR(, force_pr_aptpl);
1025 CONFIGFS_ATTR_RO(, hw_block_size);
1026 CONFIGFS_ATTR(, block_size);
1027 CONFIGFS_ATTR_RO(, hw_max_sectors);
1028 CONFIGFS_ATTR(, optimal_sectors);
1029 CONFIGFS_ATTR_RO(, hw_queue_depth);
1030 CONFIGFS_ATTR(, queue_depth);
1031 CONFIGFS_ATTR(, max_unmap_lba_count);
1032 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1033 CONFIGFS_ATTR(, unmap_granularity);
1034 CONFIGFS_ATTR(, unmap_granularity_alignment);
1035 CONFIGFS_ATTR(, unmap_zeroes_data);
1036 CONFIGFS_ATTR(, max_write_same_len);
1037
1038 /*
1039 * dev_attrib attributes for devices using the target core SBC/SPC
1040 * interpreter. Any backend using spc_parse_cdb should be using
1041 * these.
1042 */
1043 struct configfs_attribute *sbc_attrib_attrs[] = {
1044 &attr_emulate_model_alias,
1045 &attr_emulate_dpo,
1046 &attr_emulate_fua_write,
1047 &attr_emulate_fua_read,
1048 &attr_emulate_write_cache,
1049 &attr_emulate_ua_intlck_ctrl,
1050 &attr_emulate_tas,
1051 &attr_emulate_tpu,
1052 &attr_emulate_tpws,
1053 &attr_emulate_caw,
1054 &attr_emulate_3pc,
1055 &attr_pi_prot_type,
1056 &attr_hw_pi_prot_type,
1057 &attr_pi_prot_format,
1058 &attr_enforce_pr_isids,
1059 &attr_is_nonrot,
1060 &attr_emulate_rest_reord,
1061 &attr_force_pr_aptpl,
1062 &attr_hw_block_size,
1063 &attr_block_size,
1064 &attr_hw_max_sectors,
1065 &attr_optimal_sectors,
1066 &attr_hw_queue_depth,
1067 &attr_queue_depth,
1068 &attr_max_unmap_lba_count,
1069 &attr_max_unmap_block_desc_count,
1070 &attr_unmap_granularity,
1071 &attr_unmap_granularity_alignment,
1072 &attr_unmap_zeroes_data,
1073 &attr_max_write_same_len,
1074 NULL,
1075 };
1076 EXPORT_SYMBOL(sbc_attrib_attrs);
1077
1078 /*
1079 * Minimal dev_attrib attributes for devices passing through CDBs.
1080 * In this case we only provide a few read-only attributes for
1081 * backwards compatibility.
1082 */
1083 struct configfs_attribute *passthrough_attrib_attrs[] = {
1084 &attr_hw_pi_prot_type,
1085 &attr_hw_block_size,
1086 &attr_hw_max_sectors,
1087 &attr_hw_queue_depth,
1088 NULL,
1089 };
1090 EXPORT_SYMBOL(passthrough_attrib_attrs);
1091
1092 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1093
1094 /* End functions for struct config_item_type tb_dev_attrib_cit */
1095
1096 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1097
1098 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1099 {
1100 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1101 }
1102
1103 /*
1104 * VPD page 0x80 Unit serial
1105 */
1106 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1107 char *page)
1108 {
1109 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1110 &to_t10_wwn(item)->unit_serial[0]);
1111 }
1112
1113 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1114 const char *page, size_t count)
1115 {
1116 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1117 struct se_device *dev = t10_wwn->t10_dev;
1118 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1119
1120 /*
1121 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1122 * from the struct scsi_device level firmware, do not allow
1123 * VPD Unit Serial to be emulated.
1124 *
1125 * Note this struct scsi_device could also be emulating VPD
1126 * information from its drivers/scsi LLD. But for now we assume
1127 * it is doing 'the right thing' wrt a world wide unique
1128 * VPD Unit Serial Number that OS dependent multipath can depend on.
1129 */
1130 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1131 pr_err("Underlying SCSI device firmware provided VPD"
1132 " Unit Serial, ignoring request\n");
1133 return -EOPNOTSUPP;
1134 }
1135
1136 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1137 pr_err("Emulated VPD Unit Serial exceeds"
1138 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1139 return -EOVERFLOW;
1140 }
1141 /*
1142 * Check to see if any active $FABRIC_MOD exports exist. If they
1143 * do exist, fail here as changing this information on the fly
1144 * (underneath the initiator side OS dependent multipath code)
1145 * could cause negative effects.
1146 */
1147 if (dev->export_count) {
1148 pr_err("Unable to set VPD Unit Serial while"
1149 " active %d $FABRIC_MOD exports exist\n",
1150 dev->export_count);
1151 return -EINVAL;
1152 }
1153
1154 /*
1155 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1156 *
1157 * Also, strip any newline added from the userspace
1158 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1159 */
1160 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1161 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1162 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1163 "%s", strstrip(buf));
1164 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1165
1166 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1167 " %s\n", dev->t10_wwn.unit_serial);
1168
1169 return count;
1170 }
1171
1172 /*
1173 * VPD page 0x83 Protocol Identifier
1174 */
1175 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1176 char *page)
1177 {
1178 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1179 struct t10_vpd *vpd;
1180 unsigned char buf[VPD_TMP_BUF_SIZE];
1181 ssize_t len = 0;
1182
1183 memset(buf, 0, VPD_TMP_BUF_SIZE);
1184
1185 spin_lock(&t10_wwn->t10_vpd_lock);
1186 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1187 if (!vpd->protocol_identifier_set)
1188 continue;
1189
1190 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1191
1192 if (len + strlen(buf) >= PAGE_SIZE)
1193 break;
1194
1195 len += sprintf(page+len, "%s", buf);
1196 }
1197 spin_unlock(&t10_wwn->t10_vpd_lock);
1198
1199 return len;
1200 }
1201
1202 /*
1203 * Generic wrapper for dumping VPD identifiers by association.
1204 */
1205 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1206 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1207 char *page) \
1208 { \
1209 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1210 struct t10_vpd *vpd; \
1211 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1212 ssize_t len = 0; \
1213 \
1214 spin_lock(&t10_wwn->t10_vpd_lock); \
1215 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1216 if (vpd->association != _assoc) \
1217 continue; \
1218 \
1219 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1220 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1221 if (len + strlen(buf) >= PAGE_SIZE) \
1222 break; \
1223 len += sprintf(page+len, "%s", buf); \
1224 \
1225 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1226 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1227 if (len + strlen(buf) >= PAGE_SIZE) \
1228 break; \
1229 len += sprintf(page+len, "%s", buf); \
1230 \
1231 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1232 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1233 if (len + strlen(buf) >= PAGE_SIZE) \
1234 break; \
1235 len += sprintf(page+len, "%s", buf); \
1236 } \
1237 spin_unlock(&t10_wwn->t10_vpd_lock); \
1238 \
1239 return len; \
1240 }
1241
1242 /* VPD page 0x83 Association: Logical Unit */
1243 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1244 /* VPD page 0x83 Association: Target Port */
1245 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1246 /* VPD page 0x83 Association: SCSI Target Device */
1247 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1248
1249 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1250 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1251 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1252 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1253 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1254
1255 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1256 &target_wwn_attr_vpd_unit_serial,
1257 &target_wwn_attr_vpd_protocol_identifier,
1258 &target_wwn_attr_vpd_assoc_logical_unit,
1259 &target_wwn_attr_vpd_assoc_target_port,
1260 &target_wwn_attr_vpd_assoc_scsi_target_device,
1261 NULL,
1262 };
1263
1264 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1265
1266 /* End functions for struct config_item_type tb_dev_wwn_cit */
1267
1268 /* Start functions for struct config_item_type tb_dev_pr_cit */
1269
1270 static struct se_device *pr_to_dev(struct config_item *item)
1271 {
1272 return container_of(to_config_group(item), struct se_device,
1273 dev_pr_group);
1274 }
1275
1276 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1277 char *page)
1278 {
1279 struct se_node_acl *se_nacl;
1280 struct t10_pr_registration *pr_reg;
1281 char i_buf[PR_REG_ISID_ID_LEN];
1282
1283 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1284
1285 pr_reg = dev->dev_pr_res_holder;
1286 if (!pr_reg)
1287 return sprintf(page, "No SPC-3 Reservation holder\n");
1288
1289 se_nacl = pr_reg->pr_reg_nacl;
1290 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1291
1292 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1293 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1294 se_nacl->initiatorname, i_buf);
1295 }
1296
1297 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1298 char *page)
1299 {
1300 struct se_node_acl *se_nacl;
1301 ssize_t len;
1302
1303 se_nacl = dev->dev_reserved_node_acl;
1304 if (se_nacl) {
1305 len = sprintf(page,
1306 "SPC-2 Reservation: %s Initiator: %s\n",
1307 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1308 se_nacl->initiatorname);
1309 } else {
1310 len = sprintf(page, "No SPC-2 Reservation holder\n");
1311 }
1312 return len;
1313 }
1314
1315 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1316 {
1317 struct se_device *dev = pr_to_dev(item);
1318 int ret;
1319
1320 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1321 return sprintf(page, "Passthrough\n");
1322
1323 spin_lock(&dev->dev_reservation_lock);
1324 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1325 ret = target_core_dev_pr_show_spc2_res(dev, page);
1326 else
1327 ret = target_core_dev_pr_show_spc3_res(dev, page);
1328 spin_unlock(&dev->dev_reservation_lock);
1329 return ret;
1330 }
1331
1332 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1333 char *page)
1334 {
1335 struct se_device *dev = pr_to_dev(item);
1336 ssize_t len = 0;
1337
1338 spin_lock(&dev->dev_reservation_lock);
1339 if (!dev->dev_pr_res_holder) {
1340 len = sprintf(page, "No SPC-3 Reservation holder\n");
1341 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1342 len = sprintf(page, "SPC-3 Reservation: All Target"
1343 " Ports registration\n");
1344 } else {
1345 len = sprintf(page, "SPC-3 Reservation: Single"
1346 " Target Port registration\n");
1347 }
1348
1349 spin_unlock(&dev->dev_reservation_lock);
1350 return len;
1351 }
1352
1353 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1354 char *page)
1355 {
1356 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1357 }
1358
1359
1360 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1361 char *page)
1362 {
1363 struct se_device *dev = pr_to_dev(item);
1364 struct se_node_acl *se_nacl;
1365 struct se_portal_group *se_tpg;
1366 struct t10_pr_registration *pr_reg;
1367 const struct target_core_fabric_ops *tfo;
1368 ssize_t len = 0;
1369
1370 spin_lock(&dev->dev_reservation_lock);
1371 pr_reg = dev->dev_pr_res_holder;
1372 if (!pr_reg) {
1373 len = sprintf(page, "No SPC-3 Reservation holder\n");
1374 goto out_unlock;
1375 }
1376
1377 se_nacl = pr_reg->pr_reg_nacl;
1378 se_tpg = se_nacl->se_tpg;
1379 tfo = se_tpg->se_tpg_tfo;
1380
1381 len += sprintf(page+len, "SPC-3 Reservation: %s"
1382 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1383 tfo->tpg_get_wwn(se_tpg));
1384 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1385 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1386 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1387 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1388 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1389
1390 out_unlock:
1391 spin_unlock(&dev->dev_reservation_lock);
1392 return len;
1393 }
1394
1395
1396 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1397 char *page)
1398 {
1399 struct se_device *dev = pr_to_dev(item);
1400 const struct target_core_fabric_ops *tfo;
1401 struct t10_pr_registration *pr_reg;
1402 unsigned char buf[384];
1403 char i_buf[PR_REG_ISID_ID_LEN];
1404 ssize_t len = 0;
1405 int reg_count = 0;
1406
1407 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1408
1409 spin_lock(&dev->t10_pr.registration_lock);
1410 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1411 pr_reg_list) {
1412
1413 memset(buf, 0, 384);
1414 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1415 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1416 core_pr_dump_initiator_port(pr_reg, i_buf,
1417 PR_REG_ISID_ID_LEN);
1418 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1419 tfo->get_fabric_name(),
1420 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1421 pr_reg->pr_res_generation);
1422
1423 if (len + strlen(buf) >= PAGE_SIZE)
1424 break;
1425
1426 len += sprintf(page+len, "%s", buf);
1427 reg_count++;
1428 }
1429 spin_unlock(&dev->t10_pr.registration_lock);
1430
1431 if (!reg_count)
1432 len += sprintf(page+len, "None\n");
1433
1434 return len;
1435 }
1436
1437 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1438 {
1439 struct se_device *dev = pr_to_dev(item);
1440 struct t10_pr_registration *pr_reg;
1441 ssize_t len = 0;
1442
1443 spin_lock(&dev->dev_reservation_lock);
1444 pr_reg = dev->dev_pr_res_holder;
1445 if (pr_reg) {
1446 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1447 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1448 } else {
1449 len = sprintf(page, "No SPC-3 Reservation holder\n");
1450 }
1451
1452 spin_unlock(&dev->dev_reservation_lock);
1453 return len;
1454 }
1455
1456 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1457 {
1458 struct se_device *dev = pr_to_dev(item);
1459
1460 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1461 return sprintf(page, "SPC_PASSTHROUGH\n");
1462 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1463 return sprintf(page, "SPC2_RESERVATIONS\n");
1464 else
1465 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1466 }
1467
1468 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1469 char *page)
1470 {
1471 struct se_device *dev = pr_to_dev(item);
1472
1473 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1474 return 0;
1475
1476 return sprintf(page, "APTPL Bit Status: %s\n",
1477 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1478 }
1479
1480 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1481 char *page)
1482 {
1483 struct se_device *dev = pr_to_dev(item);
1484
1485 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1486 return 0;
1487
1488 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1489 }
1490
1491 enum {
1492 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1493 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1494 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1495 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1496 };
1497
1498 static match_table_t tokens = {
1499 {Opt_initiator_fabric, "initiator_fabric=%s"},
1500 {Opt_initiator_node, "initiator_node=%s"},
1501 {Opt_initiator_sid, "initiator_sid=%s"},
1502 {Opt_sa_res_key, "sa_res_key=%s"},
1503 {Opt_res_holder, "res_holder=%d"},
1504 {Opt_res_type, "res_type=%d"},
1505 {Opt_res_scope, "res_scope=%d"},
1506 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1507 {Opt_mapped_lun, "mapped_lun=%lld"},
1508 {Opt_target_fabric, "target_fabric=%s"},
1509 {Opt_target_node, "target_node=%s"},
1510 {Opt_tpgt, "tpgt=%d"},
1511 {Opt_port_rtpi, "port_rtpi=%d"},
1512 {Opt_target_lun, "target_lun=%lld"},
1513 {Opt_err, NULL}
1514 };
1515
1516 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1517 const char *page, size_t count)
1518 {
1519 struct se_device *dev = pr_to_dev(item);
1520 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1521 unsigned char *t_fabric = NULL, *t_port = NULL;
1522 char *orig, *ptr, *opts;
1523 substring_t args[MAX_OPT_ARGS];
1524 unsigned long long tmp_ll;
1525 u64 sa_res_key = 0;
1526 u64 mapped_lun = 0, target_lun = 0;
1527 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1528 u16 tpgt = 0;
1529 u8 type = 0;
1530
1531 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1532 return count;
1533 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1534 return count;
1535
1536 if (dev->export_count) {
1537 pr_debug("Unable to process APTPL metadata while"
1538 " active fabric exports exist\n");
1539 return -EINVAL;
1540 }
1541
1542 opts = kstrdup(page, GFP_KERNEL);
1543 if (!opts)
1544 return -ENOMEM;
1545
1546 orig = opts;
1547 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1548 if (!*ptr)
1549 continue;
1550
1551 token = match_token(ptr, tokens, args);
1552 switch (token) {
1553 case Opt_initiator_fabric:
1554 i_fabric = match_strdup(args);
1555 if (!i_fabric) {
1556 ret = -ENOMEM;
1557 goto out;
1558 }
1559 break;
1560 case Opt_initiator_node:
1561 i_port = match_strdup(args);
1562 if (!i_port) {
1563 ret = -ENOMEM;
1564 goto out;
1565 }
1566 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1567 pr_err("APTPL metadata initiator_node="
1568 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1569 PR_APTPL_MAX_IPORT_LEN);
1570 ret = -EINVAL;
1571 break;
1572 }
1573 break;
1574 case Opt_initiator_sid:
1575 isid = match_strdup(args);
1576 if (!isid) {
1577 ret = -ENOMEM;
1578 goto out;
1579 }
1580 if (strlen(isid) >= PR_REG_ISID_LEN) {
1581 pr_err("APTPL metadata initiator_isid"
1582 "= exceeds PR_REG_ISID_LEN: %d\n",
1583 PR_REG_ISID_LEN);
1584 ret = -EINVAL;
1585 break;
1586 }
1587 break;
1588 case Opt_sa_res_key:
1589 ret = kstrtoull(args->from, 0, &tmp_ll);
1590 if (ret < 0) {
1591 pr_err("kstrtoull() failed for sa_res_key=\n");
1592 goto out;
1593 }
1594 sa_res_key = (u64)tmp_ll;
1595 break;
1596 /*
1597 * PR APTPL Metadata for Reservation
1598 */
1599 case Opt_res_holder:
1600 ret = match_int(args, &arg);
1601 if (ret)
1602 goto out;
1603 res_holder = arg;
1604 break;
1605 case Opt_res_type:
1606 ret = match_int(args, &arg);
1607 if (ret)
1608 goto out;
1609 type = (u8)arg;
1610 break;
1611 case Opt_res_scope:
1612 ret = match_int(args, &arg);
1613 if (ret)
1614 goto out;
1615 break;
1616 case Opt_res_all_tg_pt:
1617 ret = match_int(args, &arg);
1618 if (ret)
1619 goto out;
1620 all_tg_pt = (int)arg;
1621 break;
1622 case Opt_mapped_lun:
1623 ret = match_int(args, &arg);
1624 if (ret)
1625 goto out;
1626 mapped_lun = (u64)arg;
1627 break;
1628 /*
1629 * PR APTPL Metadata for Target Port
1630 */
1631 case Opt_target_fabric:
1632 t_fabric = match_strdup(args);
1633 if (!t_fabric) {
1634 ret = -ENOMEM;
1635 goto out;
1636 }
1637 break;
1638 case Opt_target_node:
1639 t_port = match_strdup(args);
1640 if (!t_port) {
1641 ret = -ENOMEM;
1642 goto out;
1643 }
1644 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1645 pr_err("APTPL metadata target_node="
1646 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1647 PR_APTPL_MAX_TPORT_LEN);
1648 ret = -EINVAL;
1649 break;
1650 }
1651 break;
1652 case Opt_tpgt:
1653 ret = match_int(args, &arg);
1654 if (ret)
1655 goto out;
1656 tpgt = (u16)arg;
1657 break;
1658 case Opt_port_rtpi:
1659 ret = match_int(args, &arg);
1660 if (ret)
1661 goto out;
1662 break;
1663 case Opt_target_lun:
1664 ret = match_int(args, &arg);
1665 if (ret)
1666 goto out;
1667 target_lun = (u64)arg;
1668 break;
1669 default:
1670 break;
1671 }
1672 }
1673
1674 if (!i_port || !t_port || !sa_res_key) {
1675 pr_err("Illegal parameters for APTPL registration\n");
1676 ret = -EINVAL;
1677 goto out;
1678 }
1679
1680 if (res_holder && !(type)) {
1681 pr_err("Illegal PR type: 0x%02x for reservation"
1682 " holder\n", type);
1683 ret = -EINVAL;
1684 goto out;
1685 }
1686
1687 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1688 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1689 res_holder, all_tg_pt, type);
1690 out:
1691 kfree(i_fabric);
1692 kfree(i_port);
1693 kfree(isid);
1694 kfree(t_fabric);
1695 kfree(t_port);
1696 kfree(orig);
1697 return (ret == 0) ? count : ret;
1698 }
1699
1700
1701 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1702 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1703 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1704 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1705 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1706 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1707 CONFIGFS_ATTR_RO(target_pr_, res_type);
1708 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1709 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1710
1711 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1712 &target_pr_attr_res_holder,
1713 &target_pr_attr_res_pr_all_tgt_pts,
1714 &target_pr_attr_res_pr_generation,
1715 &target_pr_attr_res_pr_holder_tg_port,
1716 &target_pr_attr_res_pr_registered_i_pts,
1717 &target_pr_attr_res_pr_type,
1718 &target_pr_attr_res_type,
1719 &target_pr_attr_res_aptpl_active,
1720 &target_pr_attr_res_aptpl_metadata,
1721 NULL,
1722 };
1723
1724 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1725
1726 /* End functions for struct config_item_type tb_dev_pr_cit */
1727
1728 /* Start functions for struct config_item_type tb_dev_cit */
1729
1730 static inline struct se_device *to_device(struct config_item *item)
1731 {
1732 return container_of(to_config_group(item), struct se_device, dev_group);
1733 }
1734
1735 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1736 {
1737 struct se_device *dev = to_device(item);
1738 int bl = 0;
1739 ssize_t read_bytes = 0;
1740
1741 transport_dump_dev_state(dev, page, &bl);
1742 read_bytes += bl;
1743 read_bytes += dev->transport->show_configfs_dev_params(dev,
1744 page+read_bytes);
1745 return read_bytes;
1746 }
1747
1748 static ssize_t target_dev_control_store(struct config_item *item,
1749 const char *page, size_t count)
1750 {
1751 struct se_device *dev = to_device(item);
1752
1753 return dev->transport->set_configfs_dev_params(dev, page, count);
1754 }
1755
1756 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1757 {
1758 struct se_device *dev = to_device(item);
1759
1760 if (!(dev->dev_flags & DF_USING_ALIAS))
1761 return 0;
1762
1763 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1764 }
1765
1766 static ssize_t target_dev_alias_store(struct config_item *item,
1767 const char *page, size_t count)
1768 {
1769 struct se_device *dev = to_device(item);
1770 struct se_hba *hba = dev->se_hba;
1771 ssize_t read_bytes;
1772
1773 if (count > (SE_DEV_ALIAS_LEN-1)) {
1774 pr_err("alias count: %d exceeds"
1775 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1776 SE_DEV_ALIAS_LEN-1);
1777 return -EINVAL;
1778 }
1779
1780 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1781 if (!read_bytes)
1782 return -EINVAL;
1783 if (dev->dev_alias[read_bytes - 1] == '\n')
1784 dev->dev_alias[read_bytes - 1] = '\0';
1785
1786 dev->dev_flags |= DF_USING_ALIAS;
1787
1788 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1789 config_item_name(&hba->hba_group.cg_item),
1790 config_item_name(&dev->dev_group.cg_item),
1791 dev->dev_alias);
1792
1793 return read_bytes;
1794 }
1795
1796 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1797 {
1798 struct se_device *dev = to_device(item);
1799
1800 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1801 return 0;
1802
1803 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1804 }
1805
1806 static ssize_t target_dev_udev_path_store(struct config_item *item,
1807 const char *page, size_t count)
1808 {
1809 struct se_device *dev = to_device(item);
1810 struct se_hba *hba = dev->se_hba;
1811 ssize_t read_bytes;
1812
1813 if (count > (SE_UDEV_PATH_LEN-1)) {
1814 pr_err("udev_path count: %d exceeds"
1815 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1816 SE_UDEV_PATH_LEN-1);
1817 return -EINVAL;
1818 }
1819
1820 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1821 "%s", page);
1822 if (!read_bytes)
1823 return -EINVAL;
1824 if (dev->udev_path[read_bytes - 1] == '\n')
1825 dev->udev_path[read_bytes - 1] = '\0';
1826
1827 dev->dev_flags |= DF_USING_UDEV_PATH;
1828
1829 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1830 config_item_name(&hba->hba_group.cg_item),
1831 config_item_name(&dev->dev_group.cg_item),
1832 dev->udev_path);
1833
1834 return read_bytes;
1835 }
1836
1837 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1838 {
1839 struct se_device *dev = to_device(item);
1840
1841 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1842 }
1843
1844 static ssize_t target_dev_enable_store(struct config_item *item,
1845 const char *page, size_t count)
1846 {
1847 struct se_device *dev = to_device(item);
1848 char *ptr;
1849 int ret;
1850
1851 ptr = strstr(page, "1");
1852 if (!ptr) {
1853 pr_err("For dev_enable ops, only valid value"
1854 " is \"1\"\n");
1855 return -EINVAL;
1856 }
1857
1858 ret = target_configure_device(dev);
1859 if (ret)
1860 return ret;
1861 return count;
1862 }
1863
1864 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1865 {
1866 struct se_device *dev = to_device(item);
1867 struct config_item *lu_ci;
1868 struct t10_alua_lu_gp *lu_gp;
1869 struct t10_alua_lu_gp_member *lu_gp_mem;
1870 ssize_t len = 0;
1871
1872 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1873 if (!lu_gp_mem)
1874 return 0;
1875
1876 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1877 lu_gp = lu_gp_mem->lu_gp;
1878 if (lu_gp) {
1879 lu_ci = &lu_gp->lu_gp_group.cg_item;
1880 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1881 config_item_name(lu_ci), lu_gp->lu_gp_id);
1882 }
1883 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1884
1885 return len;
1886 }
1887
1888 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1889 const char *page, size_t count)
1890 {
1891 struct se_device *dev = to_device(item);
1892 struct se_hba *hba = dev->se_hba;
1893 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1894 struct t10_alua_lu_gp_member *lu_gp_mem;
1895 unsigned char buf[LU_GROUP_NAME_BUF];
1896 int move = 0;
1897
1898 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1899 if (!lu_gp_mem)
1900 return count;
1901
1902 if (count > LU_GROUP_NAME_BUF) {
1903 pr_err("ALUA LU Group Alias too large!\n");
1904 return -EINVAL;
1905 }
1906 memset(buf, 0, LU_GROUP_NAME_BUF);
1907 memcpy(buf, page, count);
1908 /*
1909 * Any ALUA logical unit alias besides "NULL" means we will be
1910 * making a new group association.
1911 */
1912 if (strcmp(strstrip(buf), "NULL")) {
1913 /*
1914 * core_alua_get_lu_gp_by_name() will increment reference to
1915 * struct t10_alua_lu_gp. This reference is released with
1916 * core_alua_get_lu_gp_by_name below().
1917 */
1918 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1919 if (!lu_gp_new)
1920 return -ENODEV;
1921 }
1922
1923 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1924 lu_gp = lu_gp_mem->lu_gp;
1925 if (lu_gp) {
1926 /*
1927 * Clearing an existing lu_gp association, and replacing
1928 * with NULL
1929 */
1930 if (!lu_gp_new) {
1931 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1932 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1933 " %hu\n",
1934 config_item_name(&hba->hba_group.cg_item),
1935 config_item_name(&dev->dev_group.cg_item),
1936 config_item_name(&lu_gp->lu_gp_group.cg_item),
1937 lu_gp->lu_gp_id);
1938
1939 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1940 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1941
1942 return count;
1943 }
1944 /*
1945 * Removing existing association of lu_gp_mem with lu_gp
1946 */
1947 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1948 move = 1;
1949 }
1950 /*
1951 * Associate lu_gp_mem with lu_gp_new.
1952 */
1953 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1954 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1955
1956 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
1957 " core/alua/lu_gps/%s, ID: %hu\n",
1958 (move) ? "Moving" : "Adding",
1959 config_item_name(&hba->hba_group.cg_item),
1960 config_item_name(&dev->dev_group.cg_item),
1961 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
1962 lu_gp_new->lu_gp_id);
1963
1964 core_alua_put_lu_gp_from_name(lu_gp_new);
1965 return count;
1966 }
1967
1968 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
1969 {
1970 struct se_device *dev = to_device(item);
1971 struct t10_alua_lba_map *map;
1972 struct t10_alua_lba_map_member *mem;
1973 char *b = page;
1974 int bl = 0;
1975 char state;
1976
1977 spin_lock(&dev->t10_alua.lba_map_lock);
1978 if (!list_empty(&dev->t10_alua.lba_map_list))
1979 bl += sprintf(b + bl, "%u %u\n",
1980 dev->t10_alua.lba_map_segment_size,
1981 dev->t10_alua.lba_map_segment_multiplier);
1982 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
1983 bl += sprintf(b + bl, "%llu %llu",
1984 map->lba_map_first_lba, map->lba_map_last_lba);
1985 list_for_each_entry(mem, &map->lba_map_mem_list,
1986 lba_map_mem_list) {
1987 switch (mem->lba_map_mem_alua_state) {
1988 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
1989 state = 'O';
1990 break;
1991 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
1992 state = 'A';
1993 break;
1994 case ALUA_ACCESS_STATE_STANDBY:
1995 state = 'S';
1996 break;
1997 case ALUA_ACCESS_STATE_UNAVAILABLE:
1998 state = 'U';
1999 break;
2000 default:
2001 state = '.';
2002 break;
2003 }
2004 bl += sprintf(b + bl, " %d:%c",
2005 mem->lba_map_mem_alua_pg_id, state);
2006 }
2007 bl += sprintf(b + bl, "\n");
2008 }
2009 spin_unlock(&dev->t10_alua.lba_map_lock);
2010 return bl;
2011 }
2012
2013 static ssize_t target_dev_lba_map_store(struct config_item *item,
2014 const char *page, size_t count)
2015 {
2016 struct se_device *dev = to_device(item);
2017 struct t10_alua_lba_map *lba_map = NULL;
2018 struct list_head lba_list;
2019 char *map_entries, *ptr;
2020 char state;
2021 int pg_num = -1, pg;
2022 int ret = 0, num = 0, pg_id, alua_state;
2023 unsigned long start_lba = -1, end_lba = -1;
2024 unsigned long segment_size = -1, segment_mult = -1;
2025
2026 map_entries = kstrdup(page, GFP_KERNEL);
2027 if (!map_entries)
2028 return -ENOMEM;
2029
2030 INIT_LIST_HEAD(&lba_list);
2031 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2032 if (!*ptr)
2033 continue;
2034
2035 if (num == 0) {
2036 if (sscanf(ptr, "%lu %lu\n",
2037 &segment_size, &segment_mult) != 2) {
2038 pr_err("Invalid line %d\n", num);
2039 ret = -EINVAL;
2040 break;
2041 }
2042 num++;
2043 continue;
2044 }
2045 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2046 pr_err("Invalid line %d\n", num);
2047 ret = -EINVAL;
2048 break;
2049 }
2050 ptr = strchr(ptr, ' ');
2051 if (!ptr) {
2052 pr_err("Invalid line %d, missing end lba\n", num);
2053 ret = -EINVAL;
2054 break;
2055 }
2056 ptr++;
2057 ptr = strchr(ptr, ' ');
2058 if (!ptr) {
2059 pr_err("Invalid line %d, missing state definitions\n",
2060 num);
2061 ret = -EINVAL;
2062 break;
2063 }
2064 ptr++;
2065 lba_map = core_alua_allocate_lba_map(&lba_list,
2066 start_lba, end_lba);
2067 if (IS_ERR(lba_map)) {
2068 ret = PTR_ERR(lba_map);
2069 break;
2070 }
2071 pg = 0;
2072 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2073 switch (state) {
2074 case 'O':
2075 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2076 break;
2077 case 'A':
2078 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2079 break;
2080 case 'S':
2081 alua_state = ALUA_ACCESS_STATE_STANDBY;
2082 break;
2083 case 'U':
2084 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2085 break;
2086 default:
2087 pr_err("Invalid ALUA state '%c'\n", state);
2088 ret = -EINVAL;
2089 goto out;
2090 }
2091
2092 ret = core_alua_allocate_lba_map_mem(lba_map,
2093 pg_id, alua_state);
2094 if (ret) {
2095 pr_err("Invalid target descriptor %d:%c "
2096 "at line %d\n",
2097 pg_id, state, num);
2098 break;
2099 }
2100 pg++;
2101 ptr = strchr(ptr, ' ');
2102 if (ptr)
2103 ptr++;
2104 else
2105 break;
2106 }
2107 if (pg_num == -1)
2108 pg_num = pg;
2109 else if (pg != pg_num) {
2110 pr_err("Only %d from %d port groups definitions "
2111 "at line %d\n", pg, pg_num, num);
2112 ret = -EINVAL;
2113 break;
2114 }
2115 num++;
2116 }
2117 out:
2118 if (ret) {
2119 core_alua_free_lba_map(&lba_list);
2120 count = ret;
2121 } else
2122 core_alua_set_lba_map(dev, &lba_list,
2123 segment_size, segment_mult);
2124 kfree(map_entries);
2125 return count;
2126 }
2127
2128 CONFIGFS_ATTR_RO(target_dev_, info);
2129 CONFIGFS_ATTR_WO(target_dev_, control);
2130 CONFIGFS_ATTR(target_dev_, alias);
2131 CONFIGFS_ATTR(target_dev_, udev_path);
2132 CONFIGFS_ATTR(target_dev_, enable);
2133 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2134 CONFIGFS_ATTR(target_dev_, lba_map);
2135
2136 static struct configfs_attribute *target_core_dev_attrs[] = {
2137 &target_dev_attr_info,
2138 &target_dev_attr_control,
2139 &target_dev_attr_alias,
2140 &target_dev_attr_udev_path,
2141 &target_dev_attr_enable,
2142 &target_dev_attr_alua_lu_gp,
2143 &target_dev_attr_lba_map,
2144 NULL,
2145 };
2146
2147 static void target_core_dev_release(struct config_item *item)
2148 {
2149 struct config_group *dev_cg = to_config_group(item);
2150 struct se_device *dev =
2151 container_of(dev_cg, struct se_device, dev_group);
2152
2153 kfree(dev_cg->default_groups);
2154 target_free_device(dev);
2155 }
2156
2157 static struct configfs_item_operations target_core_dev_item_ops = {
2158 .release = target_core_dev_release,
2159 };
2160
2161 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2162
2163 /* End functions for struct config_item_type tb_dev_cit */
2164
2165 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2166
2167 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2168 {
2169 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2170 lu_gp_group);
2171 }
2172
2173 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2174 {
2175 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2176
2177 if (!lu_gp->lu_gp_valid_id)
2178 return 0;
2179 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2180 }
2181
2182 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2183 const char *page, size_t count)
2184 {
2185 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2186 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2187 unsigned long lu_gp_id;
2188 int ret;
2189
2190 ret = kstrtoul(page, 0, &lu_gp_id);
2191 if (ret < 0) {
2192 pr_err("kstrtoul() returned %d for"
2193 " lu_gp_id\n", ret);
2194 return ret;
2195 }
2196 if (lu_gp_id > 0x0000ffff) {
2197 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2198 " 0x0000ffff\n", lu_gp_id);
2199 return -EINVAL;
2200 }
2201
2202 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2203 if (ret < 0)
2204 return -EINVAL;
2205
2206 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2207 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2208 config_item_name(&alua_lu_gp_cg->cg_item),
2209 lu_gp->lu_gp_id);
2210
2211 return count;
2212 }
2213
2214 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2215 {
2216 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2217 struct se_device *dev;
2218 struct se_hba *hba;
2219 struct t10_alua_lu_gp_member *lu_gp_mem;
2220 ssize_t len = 0, cur_len;
2221 unsigned char buf[LU_GROUP_NAME_BUF];
2222
2223 memset(buf, 0, LU_GROUP_NAME_BUF);
2224
2225 spin_lock(&lu_gp->lu_gp_lock);
2226 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2227 dev = lu_gp_mem->lu_gp_mem_dev;
2228 hba = dev->se_hba;
2229
2230 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2231 config_item_name(&hba->hba_group.cg_item),
2232 config_item_name(&dev->dev_group.cg_item));
2233 cur_len++; /* Extra byte for NULL terminator */
2234
2235 if ((cur_len + len) > PAGE_SIZE) {
2236 pr_warn("Ran out of lu_gp_show_attr"
2237 "_members buffer\n");
2238 break;
2239 }
2240 memcpy(page+len, buf, cur_len);
2241 len += cur_len;
2242 }
2243 spin_unlock(&lu_gp->lu_gp_lock);
2244
2245 return len;
2246 }
2247
2248 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2249 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2250
2251 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2252 &target_lu_gp_attr_lu_gp_id,
2253 &target_lu_gp_attr_members,
2254 NULL,
2255 };
2256
2257 static void target_core_alua_lu_gp_release(struct config_item *item)
2258 {
2259 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2260 struct t10_alua_lu_gp, lu_gp_group);
2261
2262 core_alua_free_lu_gp(lu_gp);
2263 }
2264
2265 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2266 .release = target_core_alua_lu_gp_release,
2267 };
2268
2269 static struct config_item_type target_core_alua_lu_gp_cit = {
2270 .ct_item_ops = &target_core_alua_lu_gp_ops,
2271 .ct_attrs = target_core_alua_lu_gp_attrs,
2272 .ct_owner = THIS_MODULE,
2273 };
2274
2275 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2276
2277 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2278
2279 static struct config_group *target_core_alua_create_lu_gp(
2280 struct config_group *group,
2281 const char *name)
2282 {
2283 struct t10_alua_lu_gp *lu_gp;
2284 struct config_group *alua_lu_gp_cg = NULL;
2285 struct config_item *alua_lu_gp_ci = NULL;
2286
2287 lu_gp = core_alua_allocate_lu_gp(name, 0);
2288 if (IS_ERR(lu_gp))
2289 return NULL;
2290
2291 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2292 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2293
2294 config_group_init_type_name(alua_lu_gp_cg, name,
2295 &target_core_alua_lu_gp_cit);
2296
2297 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2298 " Group: core/alua/lu_gps/%s\n",
2299 config_item_name(alua_lu_gp_ci));
2300
2301 return alua_lu_gp_cg;
2302
2303 }
2304
2305 static void target_core_alua_drop_lu_gp(
2306 struct config_group *group,
2307 struct config_item *item)
2308 {
2309 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2310 struct t10_alua_lu_gp, lu_gp_group);
2311
2312 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2313 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2314 config_item_name(item), lu_gp->lu_gp_id);
2315 /*
2316 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2317 * -> target_core_alua_lu_gp_release()
2318 */
2319 config_item_put(item);
2320 }
2321
2322 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2323 .make_group = &target_core_alua_create_lu_gp,
2324 .drop_item = &target_core_alua_drop_lu_gp,
2325 };
2326
2327 static struct config_item_type target_core_alua_lu_gps_cit = {
2328 .ct_item_ops = NULL,
2329 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2330 .ct_owner = THIS_MODULE,
2331 };
2332
2333 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2334
2335 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2336
2337 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2338 {
2339 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2340 tg_pt_gp_group);
2341 }
2342
2343 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2344 char *page)
2345 {
2346 return sprintf(page, "%d\n",
2347 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state));
2348 }
2349
2350 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2351 const char *page, size_t count)
2352 {
2353 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2354 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2355 unsigned long tmp;
2356 int new_state, ret;
2357
2358 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2359 pr_err("Unable to do implicit ALUA on non valid"
2360 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2361 return -EINVAL;
2362 }
2363 if (!(dev->dev_flags & DF_CONFIGURED)) {
2364 pr_err("Unable to set alua_access_state while device is"
2365 " not configured\n");
2366 return -ENODEV;
2367 }
2368
2369 ret = kstrtoul(page, 0, &tmp);
2370 if (ret < 0) {
2371 pr_err("Unable to extract new ALUA access state from"
2372 " %s\n", page);
2373 return ret;
2374 }
2375 new_state = (int)tmp;
2376
2377 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2378 pr_err("Unable to process implicit configfs ALUA"
2379 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2380 return -EINVAL;
2381 }
2382 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2383 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2384 /* LBA DEPENDENT is only allowed with implicit ALUA */
2385 pr_err("Unable to process implicit configfs ALUA transition"
2386 " while explicit ALUA management is enabled\n");
2387 return -EINVAL;
2388 }
2389
2390 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2391 NULL, NULL, new_state, 0);
2392 return (!ret) ? count : -EINVAL;
2393 }
2394
2395 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2396 char *page)
2397 {
2398 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2399 return sprintf(page, "%s\n",
2400 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2401 }
2402
2403 static ssize_t target_tg_pt_gp_alua_access_status_store(
2404 struct config_item *item, const char *page, size_t count)
2405 {
2406 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2407 unsigned long tmp;
2408 int new_status, ret;
2409
2410 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2411 pr_err("Unable to do set ALUA access status on non"
2412 " valid tg_pt_gp ID: %hu\n",
2413 tg_pt_gp->tg_pt_gp_valid_id);
2414 return -EINVAL;
2415 }
2416
2417 ret = kstrtoul(page, 0, &tmp);
2418 if (ret < 0) {
2419 pr_err("Unable to extract new ALUA access status"
2420 " from %s\n", page);
2421 return ret;
2422 }
2423 new_status = (int)tmp;
2424
2425 if ((new_status != ALUA_STATUS_NONE) &&
2426 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2427 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2428 pr_err("Illegal ALUA access status: 0x%02x\n",
2429 new_status);
2430 return -EINVAL;
2431 }
2432
2433 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2434 return count;
2435 }
2436
2437 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2438 char *page)
2439 {
2440 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2441 }
2442
2443 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2444 const char *page, size_t count)
2445 {
2446 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2447 }
2448
2449 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2450 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2451 struct config_item *item, char *p) \
2452 { \
2453 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2454 return sprintf(p, "%d\n", \
2455 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2456 } \
2457 \
2458 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2459 struct config_item *item, const char *p, size_t c) \
2460 { \
2461 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2462 unsigned long tmp; \
2463 int ret; \
2464 \
2465 if (!t->tg_pt_gp_valid_id) { \
2466 pr_err("Unable to do set ##_name ALUA state on non" \
2467 " valid tg_pt_gp ID: %hu\n", \
2468 t->tg_pt_gp_valid_id); \
2469 return -EINVAL; \
2470 } \
2471 \
2472 ret = kstrtoul(p, 0, &tmp); \
2473 if (ret < 0) { \
2474 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2475 return -EINVAL; \
2476 } \
2477 if (tmp > 1) { \
2478 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2479 return -EINVAL; \
2480 } \
2481 if (tmp) \
2482 t->tg_pt_gp_alua_supported_states |= _bit; \
2483 else \
2484 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2485 \
2486 return c; \
2487 }
2488
2489 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2490 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2491 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2492 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2493 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2494 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2495 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2496
2497 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2498 struct config_item *item, char *page)
2499 {
2500 return sprintf(page, "%d\n",
2501 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2502 }
2503
2504 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2505 struct config_item *item, const char *page, size_t count)
2506 {
2507 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2508 unsigned long tmp;
2509 int ret;
2510
2511 ret = kstrtoul(page, 0, &tmp);
2512 if (ret < 0) {
2513 pr_err("Unable to extract alua_write_metadata\n");
2514 return ret;
2515 }
2516
2517 if ((tmp != 0) && (tmp != 1)) {
2518 pr_err("Illegal value for alua_write_metadata:"
2519 " %lu\n", tmp);
2520 return -EINVAL;
2521 }
2522 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2523
2524 return count;
2525 }
2526
2527 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2528 char *page)
2529 {
2530 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2531 }
2532
2533 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2534 const char *page, size_t count)
2535 {
2536 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2537 count);
2538 }
2539
2540 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2541 char *page)
2542 {
2543 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2544 }
2545
2546 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2547 const char *page, size_t count)
2548 {
2549 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2550 count);
2551 }
2552
2553 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2554 struct config_item *item, char *page)
2555 {
2556 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2557 }
2558
2559 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2560 struct config_item *item, const char *page, size_t count)
2561 {
2562 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2563 count);
2564 }
2565
2566 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2567 char *page)
2568 {
2569 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2570 }
2571
2572 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2573 const char *page, size_t count)
2574 {
2575 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2576 }
2577
2578 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2579 char *page)
2580 {
2581 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2582
2583 if (!tg_pt_gp->tg_pt_gp_valid_id)
2584 return 0;
2585 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2586 }
2587
2588 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2589 const char *page, size_t count)
2590 {
2591 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2592 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2593 unsigned long tg_pt_gp_id;
2594 int ret;
2595
2596 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2597 if (ret < 0) {
2598 pr_err("kstrtoul() returned %d for"
2599 " tg_pt_gp_id\n", ret);
2600 return ret;
2601 }
2602 if (tg_pt_gp_id > 0x0000ffff) {
2603 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2604 " 0x0000ffff\n", tg_pt_gp_id);
2605 return -EINVAL;
2606 }
2607
2608 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2609 if (ret < 0)
2610 return -EINVAL;
2611
2612 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2613 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2614 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2615 tg_pt_gp->tg_pt_gp_id);
2616
2617 return count;
2618 }
2619
2620 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2621 char *page)
2622 {
2623 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2624 struct se_lun *lun;
2625 ssize_t len = 0, cur_len;
2626 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2627
2628 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2629
2630 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2631 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2632 lun_tg_pt_gp_link) {
2633 struct se_portal_group *tpg = lun->lun_tpg;
2634
2635 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2636 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2637 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2638 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2639 config_item_name(&lun->lun_group.cg_item));
2640 cur_len++; /* Extra byte for NULL terminator */
2641
2642 if ((cur_len + len) > PAGE_SIZE) {
2643 pr_warn("Ran out of lu_gp_show_attr"
2644 "_members buffer\n");
2645 break;
2646 }
2647 memcpy(page+len, buf, cur_len);
2648 len += cur_len;
2649 }
2650 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2651
2652 return len;
2653 }
2654
2655 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2656 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2657 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2658 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2659 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2660 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2661 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2662 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2663 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2664 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2665 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2666 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2667 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2668 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2669 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2670 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2671 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2672
2673 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2674 &target_tg_pt_gp_attr_alua_access_state,
2675 &target_tg_pt_gp_attr_alua_access_status,
2676 &target_tg_pt_gp_attr_alua_access_type,
2677 &target_tg_pt_gp_attr_alua_support_transitioning,
2678 &target_tg_pt_gp_attr_alua_support_offline,
2679 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2680 &target_tg_pt_gp_attr_alua_support_unavailable,
2681 &target_tg_pt_gp_attr_alua_support_standby,
2682 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2683 &target_tg_pt_gp_attr_alua_support_active_optimized,
2684 &target_tg_pt_gp_attr_alua_write_metadata,
2685 &target_tg_pt_gp_attr_nonop_delay_msecs,
2686 &target_tg_pt_gp_attr_trans_delay_msecs,
2687 &target_tg_pt_gp_attr_implicit_trans_secs,
2688 &target_tg_pt_gp_attr_preferred,
2689 &target_tg_pt_gp_attr_tg_pt_gp_id,
2690 &target_tg_pt_gp_attr_members,
2691 NULL,
2692 };
2693
2694 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2695 {
2696 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2697 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2698
2699 core_alua_free_tg_pt_gp(tg_pt_gp);
2700 }
2701
2702 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2703 .release = target_core_alua_tg_pt_gp_release,
2704 };
2705
2706 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2707 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2708 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2709 .ct_owner = THIS_MODULE,
2710 };
2711
2712 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2713
2714 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2715
2716 static struct config_group *target_core_alua_create_tg_pt_gp(
2717 struct config_group *group,
2718 const char *name)
2719 {
2720 struct t10_alua *alua = container_of(group, struct t10_alua,
2721 alua_tg_pt_gps_group);
2722 struct t10_alua_tg_pt_gp *tg_pt_gp;
2723 struct config_group *alua_tg_pt_gp_cg = NULL;
2724 struct config_item *alua_tg_pt_gp_ci = NULL;
2725
2726 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2727 if (!tg_pt_gp)
2728 return NULL;
2729
2730 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2731 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2732
2733 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2734 &target_core_alua_tg_pt_gp_cit);
2735
2736 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2737 " Group: alua/tg_pt_gps/%s\n",
2738 config_item_name(alua_tg_pt_gp_ci));
2739
2740 return alua_tg_pt_gp_cg;
2741 }
2742
2743 static void target_core_alua_drop_tg_pt_gp(
2744 struct config_group *group,
2745 struct config_item *item)
2746 {
2747 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2748 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2749
2750 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2751 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2752 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2753 /*
2754 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2755 * -> target_core_alua_tg_pt_gp_release().
2756 */
2757 config_item_put(item);
2758 }
2759
2760 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2761 .make_group = &target_core_alua_create_tg_pt_gp,
2762 .drop_item = &target_core_alua_drop_tg_pt_gp,
2763 };
2764
2765 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2766
2767 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2768
2769 /* Start functions for struct config_item_type target_core_alua_cit */
2770
2771 /*
2772 * target_core_alua_cit is a ConfigFS group that lives under
2773 * /sys/kernel/config/target/core/alua. There are default groups
2774 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2775 * target_core_alua_cit in target_core_init_configfs() below.
2776 */
2777 static struct config_item_type target_core_alua_cit = {
2778 .ct_item_ops = NULL,
2779 .ct_attrs = NULL,
2780 .ct_owner = THIS_MODULE,
2781 };
2782
2783 /* End functions for struct config_item_type target_core_alua_cit */
2784
2785 /* Start functions for struct config_item_type tb_dev_stat_cit */
2786
2787 static struct config_group *target_core_stat_mkdir(
2788 struct config_group *group,
2789 const char *name)
2790 {
2791 return ERR_PTR(-ENOSYS);
2792 }
2793
2794 static void target_core_stat_rmdir(
2795 struct config_group *group,
2796 struct config_item *item)
2797 {
2798 return;
2799 }
2800
2801 static struct configfs_group_operations target_core_stat_group_ops = {
2802 .make_group = &target_core_stat_mkdir,
2803 .drop_item = &target_core_stat_rmdir,
2804 };
2805
2806 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2807
2808 /* End functions for struct config_item_type tb_dev_stat_cit */
2809
2810 /* Start functions for struct config_item_type target_core_hba_cit */
2811
2812 static struct config_group *target_core_make_subdev(
2813 struct config_group *group,
2814 const char *name)
2815 {
2816 struct t10_alua_tg_pt_gp *tg_pt_gp;
2817 struct config_item *hba_ci = &group->cg_item;
2818 struct se_hba *hba = item_to_hba(hba_ci);
2819 struct target_backend *tb = hba->backend;
2820 struct se_device *dev;
2821 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
2822 struct config_group *dev_stat_grp = NULL;
2823 int errno = -ENOMEM, ret;
2824
2825 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2826 if (ret)
2827 return ERR_PTR(ret);
2828
2829 dev = target_alloc_device(hba, name);
2830 if (!dev)
2831 goto out_unlock;
2832
2833 dev_cg = &dev->dev_group;
2834
2835 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
2836 GFP_KERNEL);
2837 if (!dev_cg->default_groups)
2838 goto out_free_device;
2839
2840 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
2841 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2842 &tb->tb_dev_attrib_cit);
2843 config_group_init_type_name(&dev->dev_pr_group, "pr",
2844 &tb->tb_dev_pr_cit);
2845 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2846 &tb->tb_dev_wwn_cit);
2847 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2848 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2849 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2850 "statistics", &tb->tb_dev_stat_cit);
2851
2852 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
2853 dev_cg->default_groups[1] = &dev->dev_pr_group;
2854 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
2855 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
2856 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
2857 dev_cg->default_groups[5] = NULL;
2858 /*
2859 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2860 */
2861 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2862 if (!tg_pt_gp)
2863 goto out_free_dev_cg_default_groups;
2864 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2865
2866 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2867 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
2868 GFP_KERNEL);
2869 if (!tg_pt_gp_cg->default_groups) {
2870 pr_err("Unable to allocate tg_pt_gp_cg->"
2871 "default_groups\n");
2872 goto out_free_tg_pt_gp;
2873 }
2874
2875 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2876 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2877 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
2878 tg_pt_gp_cg->default_groups[1] = NULL;
2879 /*
2880 * Add core/$HBA/$DEV/statistics/ default groups
2881 */
2882 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2883 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
2884 GFP_KERNEL);
2885 if (!dev_stat_grp->default_groups) {
2886 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
2887 goto out_free_tg_pt_gp_cg_default_groups;
2888 }
2889 target_stat_setup_dev_default_groups(dev);
2890
2891 mutex_unlock(&hba->hba_access_mutex);
2892 return dev_cg;
2893
2894 out_free_tg_pt_gp_cg_default_groups:
2895 kfree(tg_pt_gp_cg->default_groups);
2896 out_free_tg_pt_gp:
2897 core_alua_free_tg_pt_gp(tg_pt_gp);
2898 out_free_dev_cg_default_groups:
2899 kfree(dev_cg->default_groups);
2900 out_free_device:
2901 target_free_device(dev);
2902 out_unlock:
2903 mutex_unlock(&hba->hba_access_mutex);
2904 return ERR_PTR(errno);
2905 }
2906
2907 static void target_core_drop_subdev(
2908 struct config_group *group,
2909 struct config_item *item)
2910 {
2911 struct config_group *dev_cg = to_config_group(item);
2912 struct se_device *dev =
2913 container_of(dev_cg, struct se_device, dev_group);
2914 struct se_hba *hba;
2915 struct config_item *df_item;
2916 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
2917 int i;
2918
2919 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2920
2921 mutex_lock(&hba->hba_access_mutex);
2922
2923 dev_stat_grp = &dev->dev_stat_grps.stat_group;
2924 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
2925 df_item = &dev_stat_grp->default_groups[i]->cg_item;
2926 dev_stat_grp->default_groups[i] = NULL;
2927 config_item_put(df_item);
2928 }
2929 kfree(dev_stat_grp->default_groups);
2930
2931 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
2932 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
2933 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
2934 tg_pt_gp_cg->default_groups[i] = NULL;
2935 config_item_put(df_item);
2936 }
2937 kfree(tg_pt_gp_cg->default_groups);
2938 /*
2939 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2940 * directly from target_core_alua_tg_pt_gp_release().
2941 */
2942 dev->t10_alua.default_tg_pt_gp = NULL;
2943
2944 for (i = 0; dev_cg->default_groups[i]; i++) {
2945 df_item = &dev_cg->default_groups[i]->cg_item;
2946 dev_cg->default_groups[i] = NULL;
2947 config_item_put(df_item);
2948 }
2949 /*
2950 * se_dev is released from target_core_dev_item_ops->release()
2951 */
2952 config_item_put(item);
2953 mutex_unlock(&hba->hba_access_mutex);
2954 }
2955
2956 static struct configfs_group_operations target_core_hba_group_ops = {
2957 .make_group = target_core_make_subdev,
2958 .drop_item = target_core_drop_subdev,
2959 };
2960
2961
2962 static inline struct se_hba *to_hba(struct config_item *item)
2963 {
2964 return container_of(to_config_group(item), struct se_hba, hba_group);
2965 }
2966
2967 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2968 {
2969 struct se_hba *hba = to_hba(item);
2970
2971 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2972 hba->hba_id, hba->backend->ops->name,
2973 TARGET_CORE_VERSION);
2974 }
2975
2976 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2977 {
2978 struct se_hba *hba = to_hba(item);
2979 int hba_mode = 0;
2980
2981 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2982 hba_mode = 1;
2983
2984 return sprintf(page, "%d\n", hba_mode);
2985 }
2986
2987 static ssize_t target_hba_mode_store(struct config_item *item,
2988 const char *page, size_t count)
2989 {
2990 struct se_hba *hba = to_hba(item);
2991 unsigned long mode_flag;
2992 int ret;
2993
2994 if (hba->backend->ops->pmode_enable_hba == NULL)
2995 return -EINVAL;
2996
2997 ret = kstrtoul(page, 0, &mode_flag);
2998 if (ret < 0) {
2999 pr_err("Unable to extract hba mode flag: %d\n", ret);
3000 return ret;
3001 }
3002
3003 if (hba->dev_count) {
3004 pr_err("Unable to set hba_mode with active devices\n");
3005 return -EINVAL;
3006 }
3007
3008 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3009 if (ret < 0)
3010 return -EINVAL;
3011 if (ret > 0)
3012 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3013 else if (ret == 0)
3014 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3015
3016 return count;
3017 }
3018
3019 CONFIGFS_ATTR_RO(target_, hba_info);
3020 CONFIGFS_ATTR(target_, hba_mode);
3021
3022 static void target_core_hba_release(struct config_item *item)
3023 {
3024 struct se_hba *hba = container_of(to_config_group(item),
3025 struct se_hba, hba_group);
3026 core_delete_hba(hba);
3027 }
3028
3029 static struct configfs_attribute *target_core_hba_attrs[] = {
3030 &target_attr_hba_info,
3031 &target_attr_hba_mode,
3032 NULL,
3033 };
3034
3035 static struct configfs_item_operations target_core_hba_item_ops = {
3036 .release = target_core_hba_release,
3037 };
3038
3039 static struct config_item_type target_core_hba_cit = {
3040 .ct_item_ops = &target_core_hba_item_ops,
3041 .ct_group_ops = &target_core_hba_group_ops,
3042 .ct_attrs = target_core_hba_attrs,
3043 .ct_owner = THIS_MODULE,
3044 };
3045
3046 static struct config_group *target_core_call_addhbatotarget(
3047 struct config_group *group,
3048 const char *name)
3049 {
3050 char *se_plugin_str, *str, *str2;
3051 struct se_hba *hba;
3052 char buf[TARGET_CORE_NAME_MAX_LEN];
3053 unsigned long plugin_dep_id = 0;
3054 int ret;
3055
3056 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3057 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3058 pr_err("Passed *name strlen(): %d exceeds"
3059 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3060 TARGET_CORE_NAME_MAX_LEN);
3061 return ERR_PTR(-ENAMETOOLONG);
3062 }
3063 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3064
3065 str = strstr(buf, "_");
3066 if (!str) {
3067 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3068 return ERR_PTR(-EINVAL);
3069 }
3070 se_plugin_str = buf;
3071 /*
3072 * Special case for subsystem plugins that have "_" in their names.
3073 * Namely rd_direct and rd_mcp..
3074 */
3075 str2 = strstr(str+1, "_");
3076 if (str2) {
3077 *str2 = '\0'; /* Terminate for *se_plugin_str */
3078 str2++; /* Skip to start of plugin dependent ID */
3079 str = str2;
3080 } else {
3081 *str = '\0'; /* Terminate for *se_plugin_str */
3082 str++; /* Skip to start of plugin dependent ID */
3083 }
3084
3085 ret = kstrtoul(str, 0, &plugin_dep_id);
3086 if (ret < 0) {
3087 pr_err("kstrtoul() returned %d for"
3088 " plugin_dep_id\n", ret);
3089 return ERR_PTR(ret);
3090 }
3091 /*
3092 * Load up TCM subsystem plugins if they have not already been loaded.
3093 */
3094 transport_subsystem_check_init();
3095
3096 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3097 if (IS_ERR(hba))
3098 return ERR_CAST(hba);
3099
3100 config_group_init_type_name(&hba->hba_group, name,
3101 &target_core_hba_cit);
3102
3103 return &hba->hba_group;
3104 }
3105
3106 static void target_core_call_delhbafromtarget(
3107 struct config_group *group,
3108 struct config_item *item)
3109 {
3110 /*
3111 * core_delete_hba() is called from target_core_hba_item_ops->release()
3112 * -> target_core_hba_release()
3113 */
3114 config_item_put(item);
3115 }
3116
3117 static struct configfs_group_operations target_core_group_ops = {
3118 .make_group = target_core_call_addhbatotarget,
3119 .drop_item = target_core_call_delhbafromtarget,
3120 };
3121
3122 static struct config_item_type target_core_cit = {
3123 .ct_item_ops = NULL,
3124 .ct_group_ops = &target_core_group_ops,
3125 .ct_attrs = NULL,
3126 .ct_owner = THIS_MODULE,
3127 };
3128
3129 /* Stop functions for struct config_item_type target_core_hba_cit */
3130
3131 void target_setup_backend_cits(struct target_backend *tb)
3132 {
3133 target_core_setup_dev_cit(tb);
3134 target_core_setup_dev_attrib_cit(tb);
3135 target_core_setup_dev_pr_cit(tb);
3136 target_core_setup_dev_wwn_cit(tb);
3137 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3138 target_core_setup_dev_stat_cit(tb);
3139 }
3140
3141 static int __init target_core_init_configfs(void)
3142 {
3143 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3144 struct config_group *lu_gp_cg = NULL;
3145 struct configfs_subsystem *subsys = &target_core_fabrics;
3146 struct t10_alua_lu_gp *lu_gp;
3147 int ret;
3148
3149 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3150 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3151 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3152
3153 config_group_init(&subsys->su_group);
3154 mutex_init(&subsys->su_mutex);
3155
3156 ret = init_se_kmem_caches();
3157 if (ret < 0)
3158 return ret;
3159 /*
3160 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3161 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3162 */
3163 target_cg = &subsys->su_group;
3164 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3165 GFP_KERNEL);
3166 if (!target_cg->default_groups) {
3167 pr_err("Unable to allocate target_cg->default_groups\n");
3168 ret = -ENOMEM;
3169 goto out_global;
3170 }
3171
3172 config_group_init_type_name(&target_core_hbagroup,
3173 "core", &target_core_cit);
3174 target_cg->default_groups[0] = &target_core_hbagroup;
3175 target_cg->default_groups[1] = NULL;
3176 /*
3177 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3178 */
3179 hba_cg = &target_core_hbagroup;
3180 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3181 GFP_KERNEL);
3182 if (!hba_cg->default_groups) {
3183 pr_err("Unable to allocate hba_cg->default_groups\n");
3184 ret = -ENOMEM;
3185 goto out_global;
3186 }
3187 config_group_init_type_name(&alua_group,
3188 "alua", &target_core_alua_cit);
3189 hba_cg->default_groups[0] = &alua_group;
3190 hba_cg->default_groups[1] = NULL;
3191 /*
3192 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3193 * groups under /sys/kernel/config/target/core/alua/
3194 */
3195 alua_cg = &alua_group;
3196 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3197 GFP_KERNEL);
3198 if (!alua_cg->default_groups) {
3199 pr_err("Unable to allocate alua_cg->default_groups\n");
3200 ret = -ENOMEM;
3201 goto out_global;
3202 }
3203
3204 config_group_init_type_name(&alua_lu_gps_group,
3205 "lu_gps", &target_core_alua_lu_gps_cit);
3206 alua_cg->default_groups[0] = &alua_lu_gps_group;
3207 alua_cg->default_groups[1] = NULL;
3208 /*
3209 * Add core/alua/lu_gps/default_lu_gp
3210 */
3211 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3212 if (IS_ERR(lu_gp)) {
3213 ret = -ENOMEM;
3214 goto out_global;
3215 }
3216
3217 lu_gp_cg = &alua_lu_gps_group;
3218 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3219 GFP_KERNEL);
3220 if (!lu_gp_cg->default_groups) {
3221 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3222 ret = -ENOMEM;
3223 goto out_global;
3224 }
3225
3226 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3227 &target_core_alua_lu_gp_cit);
3228 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3229 lu_gp_cg->default_groups[1] = NULL;
3230 default_lu_gp = lu_gp;
3231 /*
3232 * Register the target_core_mod subsystem with configfs.
3233 */
3234 ret = configfs_register_subsystem(subsys);
3235 if (ret < 0) {
3236 pr_err("Error %d while registering subsystem %s\n",
3237 ret, subsys->su_group.cg_item.ci_namebuf);
3238 goto out_global;
3239 }
3240 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3241 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3242 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3243 /*
3244 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3245 */
3246 ret = rd_module_init();
3247 if (ret < 0)
3248 goto out;
3249
3250 ret = core_dev_setup_virtual_lun0();
3251 if (ret < 0)
3252 goto out;
3253
3254 ret = target_xcopy_setup_pt();
3255 if (ret < 0)
3256 goto out;
3257
3258 return 0;
3259
3260 out:
3261 configfs_unregister_subsystem(subsys);
3262 core_dev_release_virtual_lun0();
3263 rd_module_exit();
3264 out_global:
3265 if (default_lu_gp) {
3266 core_alua_free_lu_gp(default_lu_gp);
3267 default_lu_gp = NULL;
3268 }
3269 if (lu_gp_cg)
3270 kfree(lu_gp_cg->default_groups);
3271 if (alua_cg)
3272 kfree(alua_cg->default_groups);
3273 if (hba_cg)
3274 kfree(hba_cg->default_groups);
3275 kfree(target_cg->default_groups);
3276 release_se_kmem_caches();
3277 return ret;
3278 }
3279
3280 static void __exit target_core_exit_configfs(void)
3281 {
3282 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3283 struct config_item *item;
3284 int i;
3285
3286 lu_gp_cg = &alua_lu_gps_group;
3287 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3288 item = &lu_gp_cg->default_groups[i]->cg_item;
3289 lu_gp_cg->default_groups[i] = NULL;
3290 config_item_put(item);
3291 }
3292 kfree(lu_gp_cg->default_groups);
3293 lu_gp_cg->default_groups = NULL;
3294
3295 alua_cg = &alua_group;
3296 for (i = 0; alua_cg->default_groups[i]; i++) {
3297 item = &alua_cg->default_groups[i]->cg_item;
3298 alua_cg->default_groups[i] = NULL;
3299 config_item_put(item);
3300 }
3301 kfree(alua_cg->default_groups);
3302 alua_cg->default_groups = NULL;
3303
3304 hba_cg = &target_core_hbagroup;
3305 for (i = 0; hba_cg->default_groups[i]; i++) {
3306 item = &hba_cg->default_groups[i]->cg_item;
3307 hba_cg->default_groups[i] = NULL;
3308 config_item_put(item);
3309 }
3310 kfree(hba_cg->default_groups);
3311 hba_cg->default_groups = NULL;
3312 /*
3313 * We expect subsys->su_group.default_groups to be released
3314 * by configfs subsystem provider logic..
3315 */
3316 configfs_unregister_subsystem(&target_core_fabrics);
3317 kfree(target_core_fabrics.su_group.default_groups);
3318
3319 core_alua_free_lu_gp(default_lu_gp);
3320 default_lu_gp = NULL;
3321
3322 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3323 " Infrastructure\n");
3324
3325 core_dev_release_virtual_lun0();
3326 rd_module_exit();
3327 target_xcopy_release_pt();
3328 release_se_kmem_caches();
3329 }
3330
3331 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3332 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3333 MODULE_LICENSE("GPL");
3334
3335 module_init(target_core_init_configfs);
3336 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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