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