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Merge remote-tracking branch 'regmap/fix/core' into regmap-linus
[mirror_ubuntu-jammy-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 const 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 static ssize_t alua_support_show(struct config_item *item, char *page)
1089 {
1090 struct se_dev_attrib *da = to_attrib(item);
1091 u8 flags = da->da_dev->transport->transport_flags;
1092
1093 return snprintf(page, PAGE_SIZE, "%d\n",
1094 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1095 }
1096
1097 static ssize_t pgr_support_show(struct config_item *item, char *page)
1098 {
1099 struct se_dev_attrib *da = to_attrib(item);
1100 u8 flags = da->da_dev->transport->transport_flags;
1101
1102 return snprintf(page, PAGE_SIZE, "%d\n",
1103 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1104 }
1105
1106 CONFIGFS_ATTR(, emulate_model_alias);
1107 CONFIGFS_ATTR(, emulate_dpo);
1108 CONFIGFS_ATTR(, emulate_fua_write);
1109 CONFIGFS_ATTR(, emulate_fua_read);
1110 CONFIGFS_ATTR(, emulate_write_cache);
1111 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1112 CONFIGFS_ATTR(, emulate_tas);
1113 CONFIGFS_ATTR(, emulate_tpu);
1114 CONFIGFS_ATTR(, emulate_tpws);
1115 CONFIGFS_ATTR(, emulate_caw);
1116 CONFIGFS_ATTR(, emulate_3pc);
1117 CONFIGFS_ATTR(, pi_prot_type);
1118 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1119 CONFIGFS_ATTR(, pi_prot_format);
1120 CONFIGFS_ATTR(, pi_prot_verify);
1121 CONFIGFS_ATTR(, enforce_pr_isids);
1122 CONFIGFS_ATTR(, is_nonrot);
1123 CONFIGFS_ATTR(, emulate_rest_reord);
1124 CONFIGFS_ATTR(, force_pr_aptpl);
1125 CONFIGFS_ATTR_RO(, hw_block_size);
1126 CONFIGFS_ATTR(, block_size);
1127 CONFIGFS_ATTR_RO(, hw_max_sectors);
1128 CONFIGFS_ATTR(, optimal_sectors);
1129 CONFIGFS_ATTR_RO(, hw_queue_depth);
1130 CONFIGFS_ATTR(, queue_depth);
1131 CONFIGFS_ATTR(, max_unmap_lba_count);
1132 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1133 CONFIGFS_ATTR(, unmap_granularity);
1134 CONFIGFS_ATTR(, unmap_granularity_alignment);
1135 CONFIGFS_ATTR(, unmap_zeroes_data);
1136 CONFIGFS_ATTR(, max_write_same_len);
1137 CONFIGFS_ATTR_RO(, alua_support);
1138 CONFIGFS_ATTR_RO(, pgr_support);
1139
1140 /*
1141 * dev_attrib attributes for devices using the target core SBC/SPC
1142 * interpreter. Any backend using spc_parse_cdb should be using
1143 * these.
1144 */
1145 struct configfs_attribute *sbc_attrib_attrs[] = {
1146 &attr_emulate_model_alias,
1147 &attr_emulate_dpo,
1148 &attr_emulate_fua_write,
1149 &attr_emulate_fua_read,
1150 &attr_emulate_write_cache,
1151 &attr_emulate_ua_intlck_ctrl,
1152 &attr_emulate_tas,
1153 &attr_emulate_tpu,
1154 &attr_emulate_tpws,
1155 &attr_emulate_caw,
1156 &attr_emulate_3pc,
1157 &attr_pi_prot_type,
1158 &attr_hw_pi_prot_type,
1159 &attr_pi_prot_format,
1160 &attr_pi_prot_verify,
1161 &attr_enforce_pr_isids,
1162 &attr_is_nonrot,
1163 &attr_emulate_rest_reord,
1164 &attr_force_pr_aptpl,
1165 &attr_hw_block_size,
1166 &attr_block_size,
1167 &attr_hw_max_sectors,
1168 &attr_optimal_sectors,
1169 &attr_hw_queue_depth,
1170 &attr_queue_depth,
1171 &attr_max_unmap_lba_count,
1172 &attr_max_unmap_block_desc_count,
1173 &attr_unmap_granularity,
1174 &attr_unmap_granularity_alignment,
1175 &attr_unmap_zeroes_data,
1176 &attr_max_write_same_len,
1177 &attr_alua_support,
1178 &attr_pgr_support,
1179 NULL,
1180 };
1181 EXPORT_SYMBOL(sbc_attrib_attrs);
1182
1183 /*
1184 * Minimal dev_attrib attributes for devices passing through CDBs.
1185 * In this case we only provide a few read-only attributes for
1186 * backwards compatibility.
1187 */
1188 struct configfs_attribute *passthrough_attrib_attrs[] = {
1189 &attr_hw_pi_prot_type,
1190 &attr_hw_block_size,
1191 &attr_hw_max_sectors,
1192 &attr_hw_queue_depth,
1193 &attr_alua_support,
1194 &attr_pgr_support,
1195 NULL,
1196 };
1197 EXPORT_SYMBOL(passthrough_attrib_attrs);
1198
1199 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1200 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1201
1202 /* End functions for struct config_item_type tb_dev_attrib_cit */
1203
1204 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1205
1206 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1207 {
1208 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1209 }
1210
1211 /*
1212 * VPD page 0x80 Unit serial
1213 */
1214 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1215 char *page)
1216 {
1217 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1218 &to_t10_wwn(item)->unit_serial[0]);
1219 }
1220
1221 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1222 const char *page, size_t count)
1223 {
1224 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1225 struct se_device *dev = t10_wwn->t10_dev;
1226 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1227
1228 /*
1229 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1230 * from the struct scsi_device level firmware, do not allow
1231 * VPD Unit Serial to be emulated.
1232 *
1233 * Note this struct scsi_device could also be emulating VPD
1234 * information from its drivers/scsi LLD. But for now we assume
1235 * it is doing 'the right thing' wrt a world wide unique
1236 * VPD Unit Serial Number that OS dependent multipath can depend on.
1237 */
1238 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1239 pr_err("Underlying SCSI device firmware provided VPD"
1240 " Unit Serial, ignoring request\n");
1241 return -EOPNOTSUPP;
1242 }
1243
1244 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1245 pr_err("Emulated VPD Unit Serial exceeds"
1246 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1247 return -EOVERFLOW;
1248 }
1249 /*
1250 * Check to see if any active $FABRIC_MOD exports exist. If they
1251 * do exist, fail here as changing this information on the fly
1252 * (underneath the initiator side OS dependent multipath code)
1253 * could cause negative effects.
1254 */
1255 if (dev->export_count) {
1256 pr_err("Unable to set VPD Unit Serial while"
1257 " active %d $FABRIC_MOD exports exist\n",
1258 dev->export_count);
1259 return -EINVAL;
1260 }
1261
1262 /*
1263 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1264 *
1265 * Also, strip any newline added from the userspace
1266 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1267 */
1268 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1269 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1270 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1271 "%s", strstrip(buf));
1272 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1273
1274 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1275 " %s\n", dev->t10_wwn.unit_serial);
1276
1277 return count;
1278 }
1279
1280 /*
1281 * VPD page 0x83 Protocol Identifier
1282 */
1283 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1284 char *page)
1285 {
1286 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1287 struct t10_vpd *vpd;
1288 unsigned char buf[VPD_TMP_BUF_SIZE];
1289 ssize_t len = 0;
1290
1291 memset(buf, 0, VPD_TMP_BUF_SIZE);
1292
1293 spin_lock(&t10_wwn->t10_vpd_lock);
1294 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1295 if (!vpd->protocol_identifier_set)
1296 continue;
1297
1298 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1299
1300 if (len + strlen(buf) >= PAGE_SIZE)
1301 break;
1302
1303 len += sprintf(page+len, "%s", buf);
1304 }
1305 spin_unlock(&t10_wwn->t10_vpd_lock);
1306
1307 return len;
1308 }
1309
1310 /*
1311 * Generic wrapper for dumping VPD identifiers by association.
1312 */
1313 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1314 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1315 char *page) \
1316 { \
1317 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1318 struct t10_vpd *vpd; \
1319 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1320 ssize_t len = 0; \
1321 \
1322 spin_lock(&t10_wwn->t10_vpd_lock); \
1323 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1324 if (vpd->association != _assoc) \
1325 continue; \
1326 \
1327 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1328 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1329 if (len + strlen(buf) >= PAGE_SIZE) \
1330 break; \
1331 len += sprintf(page+len, "%s", buf); \
1332 \
1333 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1334 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1335 if (len + strlen(buf) >= PAGE_SIZE) \
1336 break; \
1337 len += sprintf(page+len, "%s", buf); \
1338 \
1339 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1340 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1341 if (len + strlen(buf) >= PAGE_SIZE) \
1342 break; \
1343 len += sprintf(page+len, "%s", buf); \
1344 } \
1345 spin_unlock(&t10_wwn->t10_vpd_lock); \
1346 \
1347 return len; \
1348 }
1349
1350 /* VPD page 0x83 Association: Logical Unit */
1351 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1352 /* VPD page 0x83 Association: Target Port */
1353 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1354 /* VPD page 0x83 Association: SCSI Target Device */
1355 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1356
1357 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1358 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1359 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1360 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1361 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1362
1363 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1364 &target_wwn_attr_vpd_unit_serial,
1365 &target_wwn_attr_vpd_protocol_identifier,
1366 &target_wwn_attr_vpd_assoc_logical_unit,
1367 &target_wwn_attr_vpd_assoc_target_port,
1368 &target_wwn_attr_vpd_assoc_scsi_target_device,
1369 NULL,
1370 };
1371
1372 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1373
1374 /* End functions for struct config_item_type tb_dev_wwn_cit */
1375
1376 /* Start functions for struct config_item_type tb_dev_pr_cit */
1377
1378 static struct se_device *pr_to_dev(struct config_item *item)
1379 {
1380 return container_of(to_config_group(item), struct se_device,
1381 dev_pr_group);
1382 }
1383
1384 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1385 char *page)
1386 {
1387 struct se_node_acl *se_nacl;
1388 struct t10_pr_registration *pr_reg;
1389 char i_buf[PR_REG_ISID_ID_LEN];
1390
1391 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1392
1393 pr_reg = dev->dev_pr_res_holder;
1394 if (!pr_reg)
1395 return sprintf(page, "No SPC-3 Reservation holder\n");
1396
1397 se_nacl = pr_reg->pr_reg_nacl;
1398 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1399
1400 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1401 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1402 se_nacl->initiatorname, i_buf);
1403 }
1404
1405 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1406 char *page)
1407 {
1408 struct se_node_acl *se_nacl;
1409 ssize_t len;
1410
1411 se_nacl = dev->dev_reserved_node_acl;
1412 if (se_nacl) {
1413 len = sprintf(page,
1414 "SPC-2 Reservation: %s Initiator: %s\n",
1415 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1416 se_nacl->initiatorname);
1417 } else {
1418 len = sprintf(page, "No SPC-2 Reservation holder\n");
1419 }
1420 return len;
1421 }
1422
1423 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1424 {
1425 struct se_device *dev = pr_to_dev(item);
1426 int ret;
1427
1428 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1429 return sprintf(page, "Passthrough\n");
1430
1431 spin_lock(&dev->dev_reservation_lock);
1432 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1433 ret = target_core_dev_pr_show_spc2_res(dev, page);
1434 else
1435 ret = target_core_dev_pr_show_spc3_res(dev, page);
1436 spin_unlock(&dev->dev_reservation_lock);
1437 return ret;
1438 }
1439
1440 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1441 char *page)
1442 {
1443 struct se_device *dev = pr_to_dev(item);
1444 ssize_t len = 0;
1445
1446 spin_lock(&dev->dev_reservation_lock);
1447 if (!dev->dev_pr_res_holder) {
1448 len = sprintf(page, "No SPC-3 Reservation holder\n");
1449 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1450 len = sprintf(page, "SPC-3 Reservation: All Target"
1451 " Ports registration\n");
1452 } else {
1453 len = sprintf(page, "SPC-3 Reservation: Single"
1454 " Target Port registration\n");
1455 }
1456
1457 spin_unlock(&dev->dev_reservation_lock);
1458 return len;
1459 }
1460
1461 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1462 char *page)
1463 {
1464 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1465 }
1466
1467
1468 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1469 char *page)
1470 {
1471 struct se_device *dev = pr_to_dev(item);
1472 struct se_node_acl *se_nacl;
1473 struct se_portal_group *se_tpg;
1474 struct t10_pr_registration *pr_reg;
1475 const struct target_core_fabric_ops *tfo;
1476 ssize_t len = 0;
1477
1478 spin_lock(&dev->dev_reservation_lock);
1479 pr_reg = dev->dev_pr_res_holder;
1480 if (!pr_reg) {
1481 len = sprintf(page, "No SPC-3 Reservation holder\n");
1482 goto out_unlock;
1483 }
1484
1485 se_nacl = pr_reg->pr_reg_nacl;
1486 se_tpg = se_nacl->se_tpg;
1487 tfo = se_tpg->se_tpg_tfo;
1488
1489 len += sprintf(page+len, "SPC-3 Reservation: %s"
1490 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1491 tfo->tpg_get_wwn(se_tpg));
1492 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1493 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1494 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1495 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1496 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1497
1498 out_unlock:
1499 spin_unlock(&dev->dev_reservation_lock);
1500 return len;
1501 }
1502
1503
1504 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1505 char *page)
1506 {
1507 struct se_device *dev = pr_to_dev(item);
1508 const struct target_core_fabric_ops *tfo;
1509 struct t10_pr_registration *pr_reg;
1510 unsigned char buf[384];
1511 char i_buf[PR_REG_ISID_ID_LEN];
1512 ssize_t len = 0;
1513 int reg_count = 0;
1514
1515 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1516
1517 spin_lock(&dev->t10_pr.registration_lock);
1518 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1519 pr_reg_list) {
1520
1521 memset(buf, 0, 384);
1522 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1523 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1524 core_pr_dump_initiator_port(pr_reg, i_buf,
1525 PR_REG_ISID_ID_LEN);
1526 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1527 tfo->get_fabric_name(),
1528 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1529 pr_reg->pr_res_generation);
1530
1531 if (len + strlen(buf) >= PAGE_SIZE)
1532 break;
1533
1534 len += sprintf(page+len, "%s", buf);
1535 reg_count++;
1536 }
1537 spin_unlock(&dev->t10_pr.registration_lock);
1538
1539 if (!reg_count)
1540 len += sprintf(page+len, "None\n");
1541
1542 return len;
1543 }
1544
1545 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1546 {
1547 struct se_device *dev = pr_to_dev(item);
1548 struct t10_pr_registration *pr_reg;
1549 ssize_t len = 0;
1550
1551 spin_lock(&dev->dev_reservation_lock);
1552 pr_reg = dev->dev_pr_res_holder;
1553 if (pr_reg) {
1554 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1555 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1556 } else {
1557 len = sprintf(page, "No SPC-3 Reservation holder\n");
1558 }
1559
1560 spin_unlock(&dev->dev_reservation_lock);
1561 return len;
1562 }
1563
1564 static ssize_t target_pr_res_type_show(struct config_item *item, 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 sprintf(page, "SPC_PASSTHROUGH\n");
1570 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1571 return sprintf(page, "SPC2_RESERVATIONS\n");
1572 else
1573 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1574 }
1575
1576 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1577 char *page)
1578 {
1579 struct se_device *dev = pr_to_dev(item);
1580
1581 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1582 return 0;
1583
1584 return sprintf(page, "APTPL Bit Status: %s\n",
1585 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1586 }
1587
1588 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1589 char *page)
1590 {
1591 struct se_device *dev = pr_to_dev(item);
1592
1593 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1594 return 0;
1595
1596 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1597 }
1598
1599 enum {
1600 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1601 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1602 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1603 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1604 };
1605
1606 static match_table_t tokens = {
1607 {Opt_initiator_fabric, "initiator_fabric=%s"},
1608 {Opt_initiator_node, "initiator_node=%s"},
1609 {Opt_initiator_sid, "initiator_sid=%s"},
1610 {Opt_sa_res_key, "sa_res_key=%s"},
1611 {Opt_res_holder, "res_holder=%d"},
1612 {Opt_res_type, "res_type=%d"},
1613 {Opt_res_scope, "res_scope=%d"},
1614 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1615 {Opt_mapped_lun, "mapped_lun=%u"},
1616 {Opt_target_fabric, "target_fabric=%s"},
1617 {Opt_target_node, "target_node=%s"},
1618 {Opt_tpgt, "tpgt=%d"},
1619 {Opt_port_rtpi, "port_rtpi=%d"},
1620 {Opt_target_lun, "target_lun=%u"},
1621 {Opt_err, NULL}
1622 };
1623
1624 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1625 const char *page, size_t count)
1626 {
1627 struct se_device *dev = pr_to_dev(item);
1628 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1629 unsigned char *t_fabric = NULL, *t_port = NULL;
1630 char *orig, *ptr, *opts;
1631 substring_t args[MAX_OPT_ARGS];
1632 unsigned long long tmp_ll;
1633 u64 sa_res_key = 0;
1634 u64 mapped_lun = 0, target_lun = 0;
1635 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1636 u16 tpgt = 0;
1637 u8 type = 0;
1638
1639 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1640 return count;
1641 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1642 return count;
1643
1644 if (dev->export_count) {
1645 pr_debug("Unable to process APTPL metadata while"
1646 " active fabric exports exist\n");
1647 return -EINVAL;
1648 }
1649
1650 opts = kstrdup(page, GFP_KERNEL);
1651 if (!opts)
1652 return -ENOMEM;
1653
1654 orig = opts;
1655 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1656 if (!*ptr)
1657 continue;
1658
1659 token = match_token(ptr, tokens, args);
1660 switch (token) {
1661 case Opt_initiator_fabric:
1662 i_fabric = match_strdup(args);
1663 if (!i_fabric) {
1664 ret = -ENOMEM;
1665 goto out;
1666 }
1667 break;
1668 case Opt_initiator_node:
1669 i_port = match_strdup(args);
1670 if (!i_port) {
1671 ret = -ENOMEM;
1672 goto out;
1673 }
1674 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1675 pr_err("APTPL metadata initiator_node="
1676 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1677 PR_APTPL_MAX_IPORT_LEN);
1678 ret = -EINVAL;
1679 break;
1680 }
1681 break;
1682 case Opt_initiator_sid:
1683 isid = match_strdup(args);
1684 if (!isid) {
1685 ret = -ENOMEM;
1686 goto out;
1687 }
1688 if (strlen(isid) >= PR_REG_ISID_LEN) {
1689 pr_err("APTPL metadata initiator_isid"
1690 "= exceeds PR_REG_ISID_LEN: %d\n",
1691 PR_REG_ISID_LEN);
1692 ret = -EINVAL;
1693 break;
1694 }
1695 break;
1696 case Opt_sa_res_key:
1697 ret = match_u64(args, &tmp_ll);
1698 if (ret < 0) {
1699 pr_err("kstrtoull() failed for sa_res_key=\n");
1700 goto out;
1701 }
1702 sa_res_key = (u64)tmp_ll;
1703 break;
1704 /*
1705 * PR APTPL Metadata for Reservation
1706 */
1707 case Opt_res_holder:
1708 ret = match_int(args, &arg);
1709 if (ret)
1710 goto out;
1711 res_holder = arg;
1712 break;
1713 case Opt_res_type:
1714 ret = match_int(args, &arg);
1715 if (ret)
1716 goto out;
1717 type = (u8)arg;
1718 break;
1719 case Opt_res_scope:
1720 ret = match_int(args, &arg);
1721 if (ret)
1722 goto out;
1723 break;
1724 case Opt_res_all_tg_pt:
1725 ret = match_int(args, &arg);
1726 if (ret)
1727 goto out;
1728 all_tg_pt = (int)arg;
1729 break;
1730 case Opt_mapped_lun:
1731 ret = match_u64(args, &tmp_ll);
1732 if (ret)
1733 goto out;
1734 mapped_lun = (u64)tmp_ll;
1735 break;
1736 /*
1737 * PR APTPL Metadata for Target Port
1738 */
1739 case Opt_target_fabric:
1740 t_fabric = match_strdup(args);
1741 if (!t_fabric) {
1742 ret = -ENOMEM;
1743 goto out;
1744 }
1745 break;
1746 case Opt_target_node:
1747 t_port = match_strdup(args);
1748 if (!t_port) {
1749 ret = -ENOMEM;
1750 goto out;
1751 }
1752 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1753 pr_err("APTPL metadata target_node="
1754 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1755 PR_APTPL_MAX_TPORT_LEN);
1756 ret = -EINVAL;
1757 break;
1758 }
1759 break;
1760 case Opt_tpgt:
1761 ret = match_int(args, &arg);
1762 if (ret)
1763 goto out;
1764 tpgt = (u16)arg;
1765 break;
1766 case Opt_port_rtpi:
1767 ret = match_int(args, &arg);
1768 if (ret)
1769 goto out;
1770 break;
1771 case Opt_target_lun:
1772 ret = match_u64(args, &tmp_ll);
1773 if (ret)
1774 goto out;
1775 target_lun = (u64)tmp_ll;
1776 break;
1777 default:
1778 break;
1779 }
1780 }
1781
1782 if (!i_port || !t_port || !sa_res_key) {
1783 pr_err("Illegal parameters for APTPL registration\n");
1784 ret = -EINVAL;
1785 goto out;
1786 }
1787
1788 if (res_holder && !(type)) {
1789 pr_err("Illegal PR type: 0x%02x for reservation"
1790 " holder\n", type);
1791 ret = -EINVAL;
1792 goto out;
1793 }
1794
1795 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1796 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1797 res_holder, all_tg_pt, type);
1798 out:
1799 kfree(i_fabric);
1800 kfree(i_port);
1801 kfree(isid);
1802 kfree(t_fabric);
1803 kfree(t_port);
1804 kfree(orig);
1805 return (ret == 0) ? count : ret;
1806 }
1807
1808
1809 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1810 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1811 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1812 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1813 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1814 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1815 CONFIGFS_ATTR_RO(target_pr_, res_type);
1816 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1817 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1818
1819 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1820 &target_pr_attr_res_holder,
1821 &target_pr_attr_res_pr_all_tgt_pts,
1822 &target_pr_attr_res_pr_generation,
1823 &target_pr_attr_res_pr_holder_tg_port,
1824 &target_pr_attr_res_pr_registered_i_pts,
1825 &target_pr_attr_res_pr_type,
1826 &target_pr_attr_res_type,
1827 &target_pr_attr_res_aptpl_active,
1828 &target_pr_attr_res_aptpl_metadata,
1829 NULL,
1830 };
1831
1832 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1833
1834 /* End functions for struct config_item_type tb_dev_pr_cit */
1835
1836 /* Start functions for struct config_item_type tb_dev_cit */
1837
1838 static inline struct se_device *to_device(struct config_item *item)
1839 {
1840 return container_of(to_config_group(item), struct se_device, dev_group);
1841 }
1842
1843 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1844 {
1845 struct se_device *dev = to_device(item);
1846 int bl = 0;
1847 ssize_t read_bytes = 0;
1848
1849 transport_dump_dev_state(dev, page, &bl);
1850 read_bytes += bl;
1851 read_bytes += dev->transport->show_configfs_dev_params(dev,
1852 page+read_bytes);
1853 return read_bytes;
1854 }
1855
1856 static ssize_t target_dev_control_store(struct config_item *item,
1857 const char *page, size_t count)
1858 {
1859 struct se_device *dev = to_device(item);
1860
1861 return dev->transport->set_configfs_dev_params(dev, page, count);
1862 }
1863
1864 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1865 {
1866 struct se_device *dev = to_device(item);
1867
1868 if (!(dev->dev_flags & DF_USING_ALIAS))
1869 return 0;
1870
1871 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1872 }
1873
1874 static ssize_t target_dev_alias_store(struct config_item *item,
1875 const char *page, size_t count)
1876 {
1877 struct se_device *dev = to_device(item);
1878 struct se_hba *hba = dev->se_hba;
1879 ssize_t read_bytes;
1880
1881 if (count > (SE_DEV_ALIAS_LEN-1)) {
1882 pr_err("alias count: %d exceeds"
1883 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1884 SE_DEV_ALIAS_LEN-1);
1885 return -EINVAL;
1886 }
1887
1888 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1889 if (!read_bytes)
1890 return -EINVAL;
1891 if (dev->dev_alias[read_bytes - 1] == '\n')
1892 dev->dev_alias[read_bytes - 1] = '\0';
1893
1894 dev->dev_flags |= DF_USING_ALIAS;
1895
1896 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1897 config_item_name(&hba->hba_group.cg_item),
1898 config_item_name(&dev->dev_group.cg_item),
1899 dev->dev_alias);
1900
1901 return read_bytes;
1902 }
1903
1904 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1905 {
1906 struct se_device *dev = to_device(item);
1907
1908 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1909 return 0;
1910
1911 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1912 }
1913
1914 static ssize_t target_dev_udev_path_store(struct config_item *item,
1915 const char *page, size_t count)
1916 {
1917 struct se_device *dev = to_device(item);
1918 struct se_hba *hba = dev->se_hba;
1919 ssize_t read_bytes;
1920
1921 if (count > (SE_UDEV_PATH_LEN-1)) {
1922 pr_err("udev_path count: %d exceeds"
1923 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1924 SE_UDEV_PATH_LEN-1);
1925 return -EINVAL;
1926 }
1927
1928 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1929 "%s", page);
1930 if (!read_bytes)
1931 return -EINVAL;
1932 if (dev->udev_path[read_bytes - 1] == '\n')
1933 dev->udev_path[read_bytes - 1] = '\0';
1934
1935 dev->dev_flags |= DF_USING_UDEV_PATH;
1936
1937 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1938 config_item_name(&hba->hba_group.cg_item),
1939 config_item_name(&dev->dev_group.cg_item),
1940 dev->udev_path);
1941
1942 return read_bytes;
1943 }
1944
1945 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1946 {
1947 struct se_device *dev = to_device(item);
1948
1949 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1950 }
1951
1952 static ssize_t target_dev_enable_store(struct config_item *item,
1953 const char *page, size_t count)
1954 {
1955 struct se_device *dev = to_device(item);
1956 char *ptr;
1957 int ret;
1958
1959 ptr = strstr(page, "1");
1960 if (!ptr) {
1961 pr_err("For dev_enable ops, only valid value"
1962 " is \"1\"\n");
1963 return -EINVAL;
1964 }
1965
1966 ret = target_configure_device(dev);
1967 if (ret)
1968 return ret;
1969 return count;
1970 }
1971
1972 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1973 {
1974 struct se_device *dev = to_device(item);
1975 struct config_item *lu_ci;
1976 struct t10_alua_lu_gp *lu_gp;
1977 struct t10_alua_lu_gp_member *lu_gp_mem;
1978 ssize_t len = 0;
1979
1980 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1981 if (!lu_gp_mem)
1982 return 0;
1983
1984 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1985 lu_gp = lu_gp_mem->lu_gp;
1986 if (lu_gp) {
1987 lu_ci = &lu_gp->lu_gp_group.cg_item;
1988 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1989 config_item_name(lu_ci), lu_gp->lu_gp_id);
1990 }
1991 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1992
1993 return len;
1994 }
1995
1996 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1997 const char *page, size_t count)
1998 {
1999 struct se_device *dev = to_device(item);
2000 struct se_hba *hba = dev->se_hba;
2001 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2002 struct t10_alua_lu_gp_member *lu_gp_mem;
2003 unsigned char buf[LU_GROUP_NAME_BUF];
2004 int move = 0;
2005
2006 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2007 if (!lu_gp_mem)
2008 return count;
2009
2010 if (count > LU_GROUP_NAME_BUF) {
2011 pr_err("ALUA LU Group Alias too large!\n");
2012 return -EINVAL;
2013 }
2014 memset(buf, 0, LU_GROUP_NAME_BUF);
2015 memcpy(buf, page, count);
2016 /*
2017 * Any ALUA logical unit alias besides "NULL" means we will be
2018 * making a new group association.
2019 */
2020 if (strcmp(strstrip(buf), "NULL")) {
2021 /*
2022 * core_alua_get_lu_gp_by_name() will increment reference to
2023 * struct t10_alua_lu_gp. This reference is released with
2024 * core_alua_get_lu_gp_by_name below().
2025 */
2026 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2027 if (!lu_gp_new)
2028 return -ENODEV;
2029 }
2030
2031 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2032 lu_gp = lu_gp_mem->lu_gp;
2033 if (lu_gp) {
2034 /*
2035 * Clearing an existing lu_gp association, and replacing
2036 * with NULL
2037 */
2038 if (!lu_gp_new) {
2039 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2040 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2041 " %hu\n",
2042 config_item_name(&hba->hba_group.cg_item),
2043 config_item_name(&dev->dev_group.cg_item),
2044 config_item_name(&lu_gp->lu_gp_group.cg_item),
2045 lu_gp->lu_gp_id);
2046
2047 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2048 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2049
2050 return count;
2051 }
2052 /*
2053 * Removing existing association of lu_gp_mem with lu_gp
2054 */
2055 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2056 move = 1;
2057 }
2058 /*
2059 * Associate lu_gp_mem with lu_gp_new.
2060 */
2061 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2062 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2063
2064 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2065 " core/alua/lu_gps/%s, ID: %hu\n",
2066 (move) ? "Moving" : "Adding",
2067 config_item_name(&hba->hba_group.cg_item),
2068 config_item_name(&dev->dev_group.cg_item),
2069 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2070 lu_gp_new->lu_gp_id);
2071
2072 core_alua_put_lu_gp_from_name(lu_gp_new);
2073 return count;
2074 }
2075
2076 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2077 {
2078 struct se_device *dev = to_device(item);
2079 struct t10_alua_lba_map *map;
2080 struct t10_alua_lba_map_member *mem;
2081 char *b = page;
2082 int bl = 0;
2083 char state;
2084
2085 spin_lock(&dev->t10_alua.lba_map_lock);
2086 if (!list_empty(&dev->t10_alua.lba_map_list))
2087 bl += sprintf(b + bl, "%u %u\n",
2088 dev->t10_alua.lba_map_segment_size,
2089 dev->t10_alua.lba_map_segment_multiplier);
2090 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2091 bl += sprintf(b + bl, "%llu %llu",
2092 map->lba_map_first_lba, map->lba_map_last_lba);
2093 list_for_each_entry(mem, &map->lba_map_mem_list,
2094 lba_map_mem_list) {
2095 switch (mem->lba_map_mem_alua_state) {
2096 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2097 state = 'O';
2098 break;
2099 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2100 state = 'A';
2101 break;
2102 case ALUA_ACCESS_STATE_STANDBY:
2103 state = 'S';
2104 break;
2105 case ALUA_ACCESS_STATE_UNAVAILABLE:
2106 state = 'U';
2107 break;
2108 default:
2109 state = '.';
2110 break;
2111 }
2112 bl += sprintf(b + bl, " %d:%c",
2113 mem->lba_map_mem_alua_pg_id, state);
2114 }
2115 bl += sprintf(b + bl, "\n");
2116 }
2117 spin_unlock(&dev->t10_alua.lba_map_lock);
2118 return bl;
2119 }
2120
2121 static ssize_t target_dev_lba_map_store(struct config_item *item,
2122 const char *page, size_t count)
2123 {
2124 struct se_device *dev = to_device(item);
2125 struct t10_alua_lba_map *lba_map = NULL;
2126 struct list_head lba_list;
2127 char *map_entries, *orig, *ptr;
2128 char state;
2129 int pg_num = -1, pg;
2130 int ret = 0, num = 0, pg_id, alua_state;
2131 unsigned long start_lba = -1, end_lba = -1;
2132 unsigned long segment_size = -1, segment_mult = -1;
2133
2134 orig = map_entries = kstrdup(page, GFP_KERNEL);
2135 if (!map_entries)
2136 return -ENOMEM;
2137
2138 INIT_LIST_HEAD(&lba_list);
2139 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2140 if (!*ptr)
2141 continue;
2142
2143 if (num == 0) {
2144 if (sscanf(ptr, "%lu %lu\n",
2145 &segment_size, &segment_mult) != 2) {
2146 pr_err("Invalid line %d\n", num);
2147 ret = -EINVAL;
2148 break;
2149 }
2150 num++;
2151 continue;
2152 }
2153 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2154 pr_err("Invalid line %d\n", num);
2155 ret = -EINVAL;
2156 break;
2157 }
2158 ptr = strchr(ptr, ' ');
2159 if (!ptr) {
2160 pr_err("Invalid line %d, missing end lba\n", num);
2161 ret = -EINVAL;
2162 break;
2163 }
2164 ptr++;
2165 ptr = strchr(ptr, ' ');
2166 if (!ptr) {
2167 pr_err("Invalid line %d, missing state definitions\n",
2168 num);
2169 ret = -EINVAL;
2170 break;
2171 }
2172 ptr++;
2173 lba_map = core_alua_allocate_lba_map(&lba_list,
2174 start_lba, end_lba);
2175 if (IS_ERR(lba_map)) {
2176 ret = PTR_ERR(lba_map);
2177 break;
2178 }
2179 pg = 0;
2180 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2181 switch (state) {
2182 case 'O':
2183 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2184 break;
2185 case 'A':
2186 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2187 break;
2188 case 'S':
2189 alua_state = ALUA_ACCESS_STATE_STANDBY;
2190 break;
2191 case 'U':
2192 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2193 break;
2194 default:
2195 pr_err("Invalid ALUA state '%c'\n", state);
2196 ret = -EINVAL;
2197 goto out;
2198 }
2199
2200 ret = core_alua_allocate_lba_map_mem(lba_map,
2201 pg_id, alua_state);
2202 if (ret) {
2203 pr_err("Invalid target descriptor %d:%c "
2204 "at line %d\n",
2205 pg_id, state, num);
2206 break;
2207 }
2208 pg++;
2209 ptr = strchr(ptr, ' ');
2210 if (ptr)
2211 ptr++;
2212 else
2213 break;
2214 }
2215 if (pg_num == -1)
2216 pg_num = pg;
2217 else if (pg != pg_num) {
2218 pr_err("Only %d from %d port groups definitions "
2219 "at line %d\n", pg, pg_num, num);
2220 ret = -EINVAL;
2221 break;
2222 }
2223 num++;
2224 }
2225 out:
2226 if (ret) {
2227 core_alua_free_lba_map(&lba_list);
2228 count = ret;
2229 } else
2230 core_alua_set_lba_map(dev, &lba_list,
2231 segment_size, segment_mult);
2232 kfree(orig);
2233 return count;
2234 }
2235
2236 CONFIGFS_ATTR_RO(target_dev_, info);
2237 CONFIGFS_ATTR_WO(target_dev_, control);
2238 CONFIGFS_ATTR(target_dev_, alias);
2239 CONFIGFS_ATTR(target_dev_, udev_path);
2240 CONFIGFS_ATTR(target_dev_, enable);
2241 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2242 CONFIGFS_ATTR(target_dev_, lba_map);
2243
2244 static struct configfs_attribute *target_core_dev_attrs[] = {
2245 &target_dev_attr_info,
2246 &target_dev_attr_control,
2247 &target_dev_attr_alias,
2248 &target_dev_attr_udev_path,
2249 &target_dev_attr_enable,
2250 &target_dev_attr_alua_lu_gp,
2251 &target_dev_attr_lba_map,
2252 NULL,
2253 };
2254
2255 static void target_core_dev_release(struct config_item *item)
2256 {
2257 struct config_group *dev_cg = to_config_group(item);
2258 struct se_device *dev =
2259 container_of(dev_cg, struct se_device, dev_group);
2260
2261 target_free_device(dev);
2262 }
2263
2264 /*
2265 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2266 * within target_fabric_port_link()
2267 */
2268 struct configfs_item_operations target_core_dev_item_ops = {
2269 .release = target_core_dev_release,
2270 };
2271
2272 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2273
2274 /* End functions for struct config_item_type tb_dev_cit */
2275
2276 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2277
2278 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2279 {
2280 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2281 lu_gp_group);
2282 }
2283
2284 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2285 {
2286 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2287
2288 if (!lu_gp->lu_gp_valid_id)
2289 return 0;
2290 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2291 }
2292
2293 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2294 const char *page, size_t count)
2295 {
2296 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2297 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2298 unsigned long lu_gp_id;
2299 int ret;
2300
2301 ret = kstrtoul(page, 0, &lu_gp_id);
2302 if (ret < 0) {
2303 pr_err("kstrtoul() returned %d for"
2304 " lu_gp_id\n", ret);
2305 return ret;
2306 }
2307 if (lu_gp_id > 0x0000ffff) {
2308 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2309 " 0x0000ffff\n", lu_gp_id);
2310 return -EINVAL;
2311 }
2312
2313 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2314 if (ret < 0)
2315 return -EINVAL;
2316
2317 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2318 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2319 config_item_name(&alua_lu_gp_cg->cg_item),
2320 lu_gp->lu_gp_id);
2321
2322 return count;
2323 }
2324
2325 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2326 {
2327 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2328 struct se_device *dev;
2329 struct se_hba *hba;
2330 struct t10_alua_lu_gp_member *lu_gp_mem;
2331 ssize_t len = 0, cur_len;
2332 unsigned char buf[LU_GROUP_NAME_BUF];
2333
2334 memset(buf, 0, LU_GROUP_NAME_BUF);
2335
2336 spin_lock(&lu_gp->lu_gp_lock);
2337 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2338 dev = lu_gp_mem->lu_gp_mem_dev;
2339 hba = dev->se_hba;
2340
2341 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2342 config_item_name(&hba->hba_group.cg_item),
2343 config_item_name(&dev->dev_group.cg_item));
2344 cur_len++; /* Extra byte for NULL terminator */
2345
2346 if ((cur_len + len) > PAGE_SIZE) {
2347 pr_warn("Ran out of lu_gp_show_attr"
2348 "_members buffer\n");
2349 break;
2350 }
2351 memcpy(page+len, buf, cur_len);
2352 len += cur_len;
2353 }
2354 spin_unlock(&lu_gp->lu_gp_lock);
2355
2356 return len;
2357 }
2358
2359 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2360 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2361
2362 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2363 &target_lu_gp_attr_lu_gp_id,
2364 &target_lu_gp_attr_members,
2365 NULL,
2366 };
2367
2368 static void target_core_alua_lu_gp_release(struct config_item *item)
2369 {
2370 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2371 struct t10_alua_lu_gp, lu_gp_group);
2372
2373 core_alua_free_lu_gp(lu_gp);
2374 }
2375
2376 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2377 .release = target_core_alua_lu_gp_release,
2378 };
2379
2380 static const struct config_item_type target_core_alua_lu_gp_cit = {
2381 .ct_item_ops = &target_core_alua_lu_gp_ops,
2382 .ct_attrs = target_core_alua_lu_gp_attrs,
2383 .ct_owner = THIS_MODULE,
2384 };
2385
2386 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2387
2388 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2389
2390 static struct config_group *target_core_alua_create_lu_gp(
2391 struct config_group *group,
2392 const char *name)
2393 {
2394 struct t10_alua_lu_gp *lu_gp;
2395 struct config_group *alua_lu_gp_cg = NULL;
2396 struct config_item *alua_lu_gp_ci = NULL;
2397
2398 lu_gp = core_alua_allocate_lu_gp(name, 0);
2399 if (IS_ERR(lu_gp))
2400 return NULL;
2401
2402 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2403 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2404
2405 config_group_init_type_name(alua_lu_gp_cg, name,
2406 &target_core_alua_lu_gp_cit);
2407
2408 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2409 " Group: core/alua/lu_gps/%s\n",
2410 config_item_name(alua_lu_gp_ci));
2411
2412 return alua_lu_gp_cg;
2413
2414 }
2415
2416 static void target_core_alua_drop_lu_gp(
2417 struct config_group *group,
2418 struct config_item *item)
2419 {
2420 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2421 struct t10_alua_lu_gp, lu_gp_group);
2422
2423 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2424 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2425 config_item_name(item), lu_gp->lu_gp_id);
2426 /*
2427 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2428 * -> target_core_alua_lu_gp_release()
2429 */
2430 config_item_put(item);
2431 }
2432
2433 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2434 .make_group = &target_core_alua_create_lu_gp,
2435 .drop_item = &target_core_alua_drop_lu_gp,
2436 };
2437
2438 static const struct config_item_type target_core_alua_lu_gps_cit = {
2439 .ct_item_ops = NULL,
2440 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2441 .ct_owner = THIS_MODULE,
2442 };
2443
2444 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2445
2446 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2447
2448 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2449 {
2450 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2451 tg_pt_gp_group);
2452 }
2453
2454 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2455 char *page)
2456 {
2457 return sprintf(page, "%d\n",
2458 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2459 }
2460
2461 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2462 const char *page, size_t count)
2463 {
2464 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2465 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2466 unsigned long tmp;
2467 int new_state, ret;
2468
2469 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2470 pr_err("Unable to do implicit ALUA on non valid"
2471 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2472 return -EINVAL;
2473 }
2474 if (!(dev->dev_flags & DF_CONFIGURED)) {
2475 pr_err("Unable to set alua_access_state while device is"
2476 " not configured\n");
2477 return -ENODEV;
2478 }
2479
2480 ret = kstrtoul(page, 0, &tmp);
2481 if (ret < 0) {
2482 pr_err("Unable to extract new ALUA access state from"
2483 " %s\n", page);
2484 return ret;
2485 }
2486 new_state = (int)tmp;
2487
2488 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2489 pr_err("Unable to process implicit configfs ALUA"
2490 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2491 return -EINVAL;
2492 }
2493 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2494 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2495 /* LBA DEPENDENT is only allowed with implicit ALUA */
2496 pr_err("Unable to process implicit configfs ALUA transition"
2497 " while explicit ALUA management is enabled\n");
2498 return -EINVAL;
2499 }
2500
2501 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2502 NULL, NULL, new_state, 0);
2503 return (!ret) ? count : -EINVAL;
2504 }
2505
2506 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2507 char *page)
2508 {
2509 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2510 return sprintf(page, "%s\n",
2511 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2512 }
2513
2514 static ssize_t target_tg_pt_gp_alua_access_status_store(
2515 struct config_item *item, const char *page, size_t count)
2516 {
2517 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2518 unsigned long tmp;
2519 int new_status, ret;
2520
2521 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2522 pr_err("Unable to do set ALUA access status on non"
2523 " valid tg_pt_gp ID: %hu\n",
2524 tg_pt_gp->tg_pt_gp_valid_id);
2525 return -EINVAL;
2526 }
2527
2528 ret = kstrtoul(page, 0, &tmp);
2529 if (ret < 0) {
2530 pr_err("Unable to extract new ALUA access status"
2531 " from %s\n", page);
2532 return ret;
2533 }
2534 new_status = (int)tmp;
2535
2536 if ((new_status != ALUA_STATUS_NONE) &&
2537 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2538 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2539 pr_err("Illegal ALUA access status: 0x%02x\n",
2540 new_status);
2541 return -EINVAL;
2542 }
2543
2544 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2545 return count;
2546 }
2547
2548 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2549 char *page)
2550 {
2551 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2552 }
2553
2554 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2555 const char *page, size_t count)
2556 {
2557 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2558 }
2559
2560 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2561 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2562 struct config_item *item, char *p) \
2563 { \
2564 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2565 return sprintf(p, "%d\n", \
2566 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2567 } \
2568 \
2569 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2570 struct config_item *item, const char *p, size_t c) \
2571 { \
2572 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2573 unsigned long tmp; \
2574 int ret; \
2575 \
2576 if (!t->tg_pt_gp_valid_id) { \
2577 pr_err("Unable to do set " #_name " ALUA state on non" \
2578 " valid tg_pt_gp ID: %hu\n", \
2579 t->tg_pt_gp_valid_id); \
2580 return -EINVAL; \
2581 } \
2582 \
2583 ret = kstrtoul(p, 0, &tmp); \
2584 if (ret < 0) { \
2585 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2586 return -EINVAL; \
2587 } \
2588 if (tmp > 1) { \
2589 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2590 return -EINVAL; \
2591 } \
2592 if (tmp) \
2593 t->tg_pt_gp_alua_supported_states |= _bit; \
2594 else \
2595 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2596 \
2597 return c; \
2598 }
2599
2600 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2601 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2602 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2603 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2604 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2605 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2606 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2607
2608 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2609 struct config_item *item, char *page)
2610 {
2611 return sprintf(page, "%d\n",
2612 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2613 }
2614
2615 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2616 struct config_item *item, const char *page, size_t count)
2617 {
2618 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2619 unsigned long tmp;
2620 int ret;
2621
2622 ret = kstrtoul(page, 0, &tmp);
2623 if (ret < 0) {
2624 pr_err("Unable to extract alua_write_metadata\n");
2625 return ret;
2626 }
2627
2628 if ((tmp != 0) && (tmp != 1)) {
2629 pr_err("Illegal value for alua_write_metadata:"
2630 " %lu\n", tmp);
2631 return -EINVAL;
2632 }
2633 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2634
2635 return count;
2636 }
2637
2638 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2639 char *page)
2640 {
2641 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2642 }
2643
2644 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2645 const char *page, size_t count)
2646 {
2647 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2648 count);
2649 }
2650
2651 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2652 char *page)
2653 {
2654 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2655 }
2656
2657 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2658 const char *page, size_t count)
2659 {
2660 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2661 count);
2662 }
2663
2664 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2665 struct config_item *item, char *page)
2666 {
2667 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2668 }
2669
2670 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2671 struct config_item *item, const char *page, size_t count)
2672 {
2673 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2674 count);
2675 }
2676
2677 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2678 char *page)
2679 {
2680 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2681 }
2682
2683 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2684 const char *page, size_t count)
2685 {
2686 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2687 }
2688
2689 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2690 char *page)
2691 {
2692 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2693
2694 if (!tg_pt_gp->tg_pt_gp_valid_id)
2695 return 0;
2696 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2697 }
2698
2699 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2700 const char *page, size_t count)
2701 {
2702 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2703 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2704 unsigned long tg_pt_gp_id;
2705 int ret;
2706
2707 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2708 if (ret < 0) {
2709 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2710 page);
2711 return ret;
2712 }
2713 if (tg_pt_gp_id > 0x0000ffff) {
2714 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2715 tg_pt_gp_id);
2716 return -EINVAL;
2717 }
2718
2719 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2720 if (ret < 0)
2721 return -EINVAL;
2722
2723 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2724 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2725 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2726 tg_pt_gp->tg_pt_gp_id);
2727
2728 return count;
2729 }
2730
2731 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2732 char *page)
2733 {
2734 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2735 struct se_lun *lun;
2736 ssize_t len = 0, cur_len;
2737 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2738
2739 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2740
2741 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2742 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2743 lun_tg_pt_gp_link) {
2744 struct se_portal_group *tpg = lun->lun_tpg;
2745
2746 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2747 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2748 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2749 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2750 config_item_name(&lun->lun_group.cg_item));
2751 cur_len++; /* Extra byte for NULL terminator */
2752
2753 if ((cur_len + len) > PAGE_SIZE) {
2754 pr_warn("Ran out of lu_gp_show_attr"
2755 "_members buffer\n");
2756 break;
2757 }
2758 memcpy(page+len, buf, cur_len);
2759 len += cur_len;
2760 }
2761 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2762
2763 return len;
2764 }
2765
2766 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2767 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2768 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2769 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2770 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2771 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2772 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2773 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2774 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2775 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2776 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2777 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2778 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2779 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2780 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2781 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2782 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2783
2784 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2785 &target_tg_pt_gp_attr_alua_access_state,
2786 &target_tg_pt_gp_attr_alua_access_status,
2787 &target_tg_pt_gp_attr_alua_access_type,
2788 &target_tg_pt_gp_attr_alua_support_transitioning,
2789 &target_tg_pt_gp_attr_alua_support_offline,
2790 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2791 &target_tg_pt_gp_attr_alua_support_unavailable,
2792 &target_tg_pt_gp_attr_alua_support_standby,
2793 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2794 &target_tg_pt_gp_attr_alua_support_active_optimized,
2795 &target_tg_pt_gp_attr_alua_write_metadata,
2796 &target_tg_pt_gp_attr_nonop_delay_msecs,
2797 &target_tg_pt_gp_attr_trans_delay_msecs,
2798 &target_tg_pt_gp_attr_implicit_trans_secs,
2799 &target_tg_pt_gp_attr_preferred,
2800 &target_tg_pt_gp_attr_tg_pt_gp_id,
2801 &target_tg_pt_gp_attr_members,
2802 NULL,
2803 };
2804
2805 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2806 {
2807 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2808 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2809
2810 core_alua_free_tg_pt_gp(tg_pt_gp);
2811 }
2812
2813 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2814 .release = target_core_alua_tg_pt_gp_release,
2815 };
2816
2817 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
2818 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2819 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2820 .ct_owner = THIS_MODULE,
2821 };
2822
2823 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2824
2825 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2826
2827 static struct config_group *target_core_alua_create_tg_pt_gp(
2828 struct config_group *group,
2829 const char *name)
2830 {
2831 struct t10_alua *alua = container_of(group, struct t10_alua,
2832 alua_tg_pt_gps_group);
2833 struct t10_alua_tg_pt_gp *tg_pt_gp;
2834 struct config_group *alua_tg_pt_gp_cg = NULL;
2835 struct config_item *alua_tg_pt_gp_ci = NULL;
2836
2837 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2838 if (!tg_pt_gp)
2839 return NULL;
2840
2841 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2842 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2843
2844 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2845 &target_core_alua_tg_pt_gp_cit);
2846
2847 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2848 " Group: alua/tg_pt_gps/%s\n",
2849 config_item_name(alua_tg_pt_gp_ci));
2850
2851 return alua_tg_pt_gp_cg;
2852 }
2853
2854 static void target_core_alua_drop_tg_pt_gp(
2855 struct config_group *group,
2856 struct config_item *item)
2857 {
2858 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2859 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2860
2861 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2862 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2863 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2864 /*
2865 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2866 * -> target_core_alua_tg_pt_gp_release().
2867 */
2868 config_item_put(item);
2869 }
2870
2871 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2872 .make_group = &target_core_alua_create_tg_pt_gp,
2873 .drop_item = &target_core_alua_drop_tg_pt_gp,
2874 };
2875
2876 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2877
2878 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2879
2880 /* Start functions for struct config_item_type target_core_alua_cit */
2881
2882 /*
2883 * target_core_alua_cit is a ConfigFS group that lives under
2884 * /sys/kernel/config/target/core/alua. There are default groups
2885 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2886 * target_core_alua_cit in target_core_init_configfs() below.
2887 */
2888 static const struct config_item_type target_core_alua_cit = {
2889 .ct_item_ops = NULL,
2890 .ct_attrs = NULL,
2891 .ct_owner = THIS_MODULE,
2892 };
2893
2894 /* End functions for struct config_item_type target_core_alua_cit */
2895
2896 /* Start functions for struct config_item_type tb_dev_stat_cit */
2897
2898 static struct config_group *target_core_stat_mkdir(
2899 struct config_group *group,
2900 const char *name)
2901 {
2902 return ERR_PTR(-ENOSYS);
2903 }
2904
2905 static void target_core_stat_rmdir(
2906 struct config_group *group,
2907 struct config_item *item)
2908 {
2909 return;
2910 }
2911
2912 static struct configfs_group_operations target_core_stat_group_ops = {
2913 .make_group = &target_core_stat_mkdir,
2914 .drop_item = &target_core_stat_rmdir,
2915 };
2916
2917 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2918
2919 /* End functions for struct config_item_type tb_dev_stat_cit */
2920
2921 /* Start functions for struct config_item_type target_core_hba_cit */
2922
2923 static struct config_group *target_core_make_subdev(
2924 struct config_group *group,
2925 const char *name)
2926 {
2927 struct t10_alua_tg_pt_gp *tg_pt_gp;
2928 struct config_item *hba_ci = &group->cg_item;
2929 struct se_hba *hba = item_to_hba(hba_ci);
2930 struct target_backend *tb = hba->backend;
2931 struct se_device *dev;
2932 int errno = -ENOMEM, ret;
2933
2934 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2935 if (ret)
2936 return ERR_PTR(ret);
2937
2938 dev = target_alloc_device(hba, name);
2939 if (!dev)
2940 goto out_unlock;
2941
2942 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2943
2944 config_group_init_type_name(&dev->dev_action_group, "action",
2945 &tb->tb_dev_action_cit);
2946 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
2947
2948 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2949 &tb->tb_dev_attrib_cit);
2950 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2951
2952 config_group_init_type_name(&dev->dev_pr_group, "pr",
2953 &tb->tb_dev_pr_cit);
2954 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2955
2956 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2957 &tb->tb_dev_wwn_cit);
2958 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2959 &dev->dev_group);
2960
2961 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2962 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2963 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2964 &dev->dev_group);
2965
2966 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2967 "statistics", &tb->tb_dev_stat_cit);
2968 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2969 &dev->dev_group);
2970
2971 /*
2972 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2973 */
2974 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2975 if (!tg_pt_gp)
2976 goto out_free_device;
2977 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2978
2979 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2980 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2981 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2982 &dev->t10_alua.alua_tg_pt_gps_group);
2983
2984 /*
2985 * Add core/$HBA/$DEV/statistics/ default groups
2986 */
2987 target_stat_setup_dev_default_groups(dev);
2988
2989 mutex_unlock(&hba->hba_access_mutex);
2990 return &dev->dev_group;
2991
2992 out_free_device:
2993 target_free_device(dev);
2994 out_unlock:
2995 mutex_unlock(&hba->hba_access_mutex);
2996 return ERR_PTR(errno);
2997 }
2998
2999 static void target_core_drop_subdev(
3000 struct config_group *group,
3001 struct config_item *item)
3002 {
3003 struct config_group *dev_cg = to_config_group(item);
3004 struct se_device *dev =
3005 container_of(dev_cg, struct se_device, dev_group);
3006 struct se_hba *hba;
3007
3008 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3009
3010 mutex_lock(&hba->hba_access_mutex);
3011
3012 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3013 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3014
3015 /*
3016 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3017 * directly from target_core_alua_tg_pt_gp_release().
3018 */
3019 dev->t10_alua.default_tg_pt_gp = NULL;
3020
3021 configfs_remove_default_groups(dev_cg);
3022
3023 /*
3024 * se_dev is released from target_core_dev_item_ops->release()
3025 */
3026 config_item_put(item);
3027 mutex_unlock(&hba->hba_access_mutex);
3028 }
3029
3030 static struct configfs_group_operations target_core_hba_group_ops = {
3031 .make_group = target_core_make_subdev,
3032 .drop_item = target_core_drop_subdev,
3033 };
3034
3035
3036 static inline struct se_hba *to_hba(struct config_item *item)
3037 {
3038 return container_of(to_config_group(item), struct se_hba, hba_group);
3039 }
3040
3041 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3042 {
3043 struct se_hba *hba = to_hba(item);
3044
3045 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3046 hba->hba_id, hba->backend->ops->name,
3047 TARGET_CORE_VERSION);
3048 }
3049
3050 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3051 {
3052 struct se_hba *hba = to_hba(item);
3053 int hba_mode = 0;
3054
3055 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3056 hba_mode = 1;
3057
3058 return sprintf(page, "%d\n", hba_mode);
3059 }
3060
3061 static ssize_t target_hba_mode_store(struct config_item *item,
3062 const char *page, size_t count)
3063 {
3064 struct se_hba *hba = to_hba(item);
3065 unsigned long mode_flag;
3066 int ret;
3067
3068 if (hba->backend->ops->pmode_enable_hba == NULL)
3069 return -EINVAL;
3070
3071 ret = kstrtoul(page, 0, &mode_flag);
3072 if (ret < 0) {
3073 pr_err("Unable to extract hba mode flag: %d\n", ret);
3074 return ret;
3075 }
3076
3077 if (hba->dev_count) {
3078 pr_err("Unable to set hba_mode with active devices\n");
3079 return -EINVAL;
3080 }
3081
3082 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3083 if (ret < 0)
3084 return -EINVAL;
3085 if (ret > 0)
3086 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3087 else if (ret == 0)
3088 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3089
3090 return count;
3091 }
3092
3093 CONFIGFS_ATTR_RO(target_, hba_info);
3094 CONFIGFS_ATTR(target_, hba_mode);
3095
3096 static void target_core_hba_release(struct config_item *item)
3097 {
3098 struct se_hba *hba = container_of(to_config_group(item),
3099 struct se_hba, hba_group);
3100 core_delete_hba(hba);
3101 }
3102
3103 static struct configfs_attribute *target_core_hba_attrs[] = {
3104 &target_attr_hba_info,
3105 &target_attr_hba_mode,
3106 NULL,
3107 };
3108
3109 static struct configfs_item_operations target_core_hba_item_ops = {
3110 .release = target_core_hba_release,
3111 };
3112
3113 static const struct config_item_type target_core_hba_cit = {
3114 .ct_item_ops = &target_core_hba_item_ops,
3115 .ct_group_ops = &target_core_hba_group_ops,
3116 .ct_attrs = target_core_hba_attrs,
3117 .ct_owner = THIS_MODULE,
3118 };
3119
3120 static struct config_group *target_core_call_addhbatotarget(
3121 struct config_group *group,
3122 const char *name)
3123 {
3124 char *se_plugin_str, *str, *str2;
3125 struct se_hba *hba;
3126 char buf[TARGET_CORE_NAME_MAX_LEN];
3127 unsigned long plugin_dep_id = 0;
3128 int ret;
3129
3130 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3131 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3132 pr_err("Passed *name strlen(): %d exceeds"
3133 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3134 TARGET_CORE_NAME_MAX_LEN);
3135 return ERR_PTR(-ENAMETOOLONG);
3136 }
3137 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3138
3139 str = strstr(buf, "_");
3140 if (!str) {
3141 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3142 return ERR_PTR(-EINVAL);
3143 }
3144 se_plugin_str = buf;
3145 /*
3146 * Special case for subsystem plugins that have "_" in their names.
3147 * Namely rd_direct and rd_mcp..
3148 */
3149 str2 = strstr(str+1, "_");
3150 if (str2) {
3151 *str2 = '\0'; /* Terminate for *se_plugin_str */
3152 str2++; /* Skip to start of plugin dependent ID */
3153 str = str2;
3154 } else {
3155 *str = '\0'; /* Terminate for *se_plugin_str */
3156 str++; /* Skip to start of plugin dependent ID */
3157 }
3158
3159 ret = kstrtoul(str, 0, &plugin_dep_id);
3160 if (ret < 0) {
3161 pr_err("kstrtoul() returned %d for"
3162 " plugin_dep_id\n", ret);
3163 return ERR_PTR(ret);
3164 }
3165 /*
3166 * Load up TCM subsystem plugins if they have not already been loaded.
3167 */
3168 transport_subsystem_check_init();
3169
3170 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3171 if (IS_ERR(hba))
3172 return ERR_CAST(hba);
3173
3174 config_group_init_type_name(&hba->hba_group, name,
3175 &target_core_hba_cit);
3176
3177 return &hba->hba_group;
3178 }
3179
3180 static void target_core_call_delhbafromtarget(
3181 struct config_group *group,
3182 struct config_item *item)
3183 {
3184 /*
3185 * core_delete_hba() is called from target_core_hba_item_ops->release()
3186 * -> target_core_hba_release()
3187 */
3188 config_item_put(item);
3189 }
3190
3191 static struct configfs_group_operations target_core_group_ops = {
3192 .make_group = target_core_call_addhbatotarget,
3193 .drop_item = target_core_call_delhbafromtarget,
3194 };
3195
3196 static const struct config_item_type target_core_cit = {
3197 .ct_item_ops = NULL,
3198 .ct_group_ops = &target_core_group_ops,
3199 .ct_attrs = NULL,
3200 .ct_owner = THIS_MODULE,
3201 };
3202
3203 /* Stop functions for struct config_item_type target_core_hba_cit */
3204
3205 void target_setup_backend_cits(struct target_backend *tb)
3206 {
3207 target_core_setup_dev_cit(tb);
3208 target_core_setup_dev_action_cit(tb);
3209 target_core_setup_dev_attrib_cit(tb);
3210 target_core_setup_dev_pr_cit(tb);
3211 target_core_setup_dev_wwn_cit(tb);
3212 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3213 target_core_setup_dev_stat_cit(tb);
3214 }
3215
3216 static int __init target_core_init_configfs(void)
3217 {
3218 struct configfs_subsystem *subsys = &target_core_fabrics;
3219 struct t10_alua_lu_gp *lu_gp;
3220 int ret;
3221
3222 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3223 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3224 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3225
3226 config_group_init(&subsys->su_group);
3227 mutex_init(&subsys->su_mutex);
3228
3229 ret = init_se_kmem_caches();
3230 if (ret < 0)
3231 return ret;
3232 /*
3233 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3234 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3235 */
3236 config_group_init_type_name(&target_core_hbagroup, "core",
3237 &target_core_cit);
3238 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3239
3240 /*
3241 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3242 */
3243 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3244 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3245
3246 /*
3247 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3248 * groups under /sys/kernel/config/target/core/alua/
3249 */
3250 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3251 &target_core_alua_lu_gps_cit);
3252 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3253
3254 /*
3255 * Add core/alua/lu_gps/default_lu_gp
3256 */
3257 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3258 if (IS_ERR(lu_gp)) {
3259 ret = -ENOMEM;
3260 goto out_global;
3261 }
3262
3263 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3264 &target_core_alua_lu_gp_cit);
3265 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3266
3267 default_lu_gp = lu_gp;
3268
3269 /*
3270 * Register the target_core_mod subsystem with configfs.
3271 */
3272 ret = configfs_register_subsystem(subsys);
3273 if (ret < 0) {
3274 pr_err("Error %d while registering subsystem %s\n",
3275 ret, subsys->su_group.cg_item.ci_namebuf);
3276 goto out_global;
3277 }
3278 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3279 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3280 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3281 /*
3282 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3283 */
3284 ret = rd_module_init();
3285 if (ret < 0)
3286 goto out;
3287
3288 ret = core_dev_setup_virtual_lun0();
3289 if (ret < 0)
3290 goto out;
3291
3292 ret = target_xcopy_setup_pt();
3293 if (ret < 0)
3294 goto out;
3295
3296 return 0;
3297
3298 out:
3299 configfs_unregister_subsystem(subsys);
3300 core_dev_release_virtual_lun0();
3301 rd_module_exit();
3302 out_global:
3303 if (default_lu_gp) {
3304 core_alua_free_lu_gp(default_lu_gp);
3305 default_lu_gp = NULL;
3306 }
3307 release_se_kmem_caches();
3308 return ret;
3309 }
3310
3311 static void __exit target_core_exit_configfs(void)
3312 {
3313 configfs_remove_default_groups(&alua_lu_gps_group);
3314 configfs_remove_default_groups(&alua_group);
3315 configfs_remove_default_groups(&target_core_hbagroup);
3316
3317 /*
3318 * We expect subsys->su_group.default_groups to be released
3319 * by configfs subsystem provider logic..
3320 */
3321 configfs_unregister_subsystem(&target_core_fabrics);
3322
3323 core_alua_free_lu_gp(default_lu_gp);
3324 default_lu_gp = NULL;
3325
3326 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3327 " Infrastructure\n");
3328
3329 core_dev_release_virtual_lun0();
3330 rd_module_exit();
3331 target_xcopy_release_pt();
3332 release_se_kmem_caches();
3333 }
3334
3335 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3336 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3337 MODULE_LICENSE("GPL");
3338
3339 module_init(target_core_init_configfs);
3340 module_exit(target_core_exit_configfs);
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