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Linux 4.19.133
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blobf6b1549f4142257e46b1399abde86665e76c887b
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 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
159
160 return read_bytes;
161 }
162
163 CONFIGFS_ATTR(target_core_item_, dbroot);
164
165 static struct target_fabric_configfs *target_core_get_fabric(
166 const char *name)
167 {
168 struct target_fabric_configfs *tf;
169
170 if (!name)
171 return NULL;
172
173 mutex_lock(&g_tf_lock);
174 list_for_each_entry(tf, &g_tf_list, tf_list) {
175 if (!strcmp(tf->tf_ops->name, name)) {
176 atomic_inc(&tf->tf_access_cnt);
177 mutex_unlock(&g_tf_lock);
178 return tf;
179 }
180 }
181 mutex_unlock(&g_tf_lock);
182
183 return NULL;
184 }
185
186 /*
187 * Called from struct target_core_group_ops->make_group()
188 */
189 static struct config_group *target_core_register_fabric(
190 struct config_group *group,
191 const char *name)
192 {
193 struct target_fabric_configfs *tf;
194 int ret;
195
196 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
197 " %s\n", group, name);
198
199 tf = target_core_get_fabric(name);
200 if (!tf) {
201 pr_debug("target_core_register_fabric() trying autoload for %s\n",
202 name);
203
204 /*
205 * Below are some hardcoded request_module() calls to automatically
206 * local fabric modules when the following is called:
207 *
208 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
209 *
210 * Note that this does not limit which TCM fabric module can be
211 * registered, but simply provids auto loading logic for modules with
212 * mkdir(2) system calls with known TCM fabric modules.
213 */
214
215 if (!strncmp(name, "iscsi", 5)) {
216 /*
217 * Automatically load the LIO Target fabric module when the
218 * following is called:
219 *
220 * mkdir -p $CONFIGFS/target/iscsi
221 */
222 ret = request_module("iscsi_target_mod");
223 if (ret < 0) {
224 pr_debug("request_module() failed for"
225 " iscsi_target_mod.ko: %d\n", ret);
226 return ERR_PTR(-EINVAL);
227 }
228 } else if (!strncmp(name, "loopback", 8)) {
229 /*
230 * Automatically load the tcm_loop fabric module when the
231 * following is called:
232 *
233 * mkdir -p $CONFIGFS/target/loopback
234 */
235 ret = request_module("tcm_loop");
236 if (ret < 0) {
237 pr_debug("request_module() failed for"
238 " tcm_loop.ko: %d\n", ret);
239 return ERR_PTR(-EINVAL);
240 }
241 }
242
243 tf = target_core_get_fabric(name);
244 }
245
246 if (!tf) {
247 pr_debug("target_core_get_fabric() failed for %s\n",
248 name);
249 return ERR_PTR(-EINVAL);
250 }
251 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
252 " %s\n", tf->tf_ops->name);
253 /*
254 * On a successful target_core_get_fabric() look, the returned
255 * struct target_fabric_configfs *tf will contain a usage reference.
256 */
257 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
258 &tf->tf_wwn_cit);
259
260 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
261
262 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
263 &tf->tf_discovery_cit);
264 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
265
266 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
267 config_item_name(&tf->tf_group.cg_item));
268 return &tf->tf_group;
269 }
270
271 /*
272 * Called from struct target_core_group_ops->drop_item()
273 */
274 static void target_core_deregister_fabric(
275 struct config_group *group,
276 struct config_item *item)
277 {
278 struct target_fabric_configfs *tf = container_of(
279 to_config_group(item), struct target_fabric_configfs, tf_group);
280
281 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
282 " tf list\n", config_item_name(item));
283
284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
285 " %s\n", tf->tf_ops->name);
286 atomic_dec(&tf->tf_access_cnt);
287
288 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
289 " %s\n", config_item_name(item));
290
291 configfs_remove_default_groups(&tf->tf_group);
292 config_item_put(item);
293 }
294
295 static struct configfs_group_operations target_core_fabric_group_ops = {
296 .make_group = &target_core_register_fabric,
297 .drop_item = &target_core_deregister_fabric,
298 };
299
300 /*
301 * All item attributes appearing in /sys/kernel/target/ appear here.
302 */
303 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
304 &target_core_item_attr_version,
305 &target_core_item_attr_dbroot,
306 NULL,
307 };
308
309 /*
310 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
311 */
312 static const struct config_item_type target_core_fabrics_item = {
313 .ct_group_ops = &target_core_fabric_group_ops,
314 .ct_attrs = target_core_fabric_item_attrs,
315 .ct_owner = THIS_MODULE,
316 };
317
318 static struct configfs_subsystem target_core_fabrics = {
319 .su_group = {
320 .cg_item = {
321 .ci_namebuf = "target",
322 .ci_type = &target_core_fabrics_item,
323 },
324 },
325 };
326
327 int target_depend_item(struct config_item *item)
328 {
329 return configfs_depend_item(&target_core_fabrics, item);
330 }
331 EXPORT_SYMBOL(target_depend_item);
332
333 void target_undepend_item(struct config_item *item)
334 {
335 return configfs_undepend_item(item);
336 }
337 EXPORT_SYMBOL(target_undepend_item);
338
339 /*##############################################################################
340 // Start functions called by external Target Fabrics Modules
341 //############################################################################*/
342
343 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
344 {
345 if (!tfo->name) {
346 pr_err("Missing tfo->name\n");
347 return -EINVAL;
348 }
349 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
350 pr_err("Passed name: %s exceeds TARGET_FABRIC"
351 "_NAME_SIZE\n", tfo->name);
352 return -EINVAL;
353 }
354 if (!tfo->get_fabric_name) {
355 pr_err("Missing tfo->get_fabric_name()\n");
356 return -EINVAL;
357 }
358 if (!tfo->tpg_get_wwn) {
359 pr_err("Missing tfo->tpg_get_wwn()\n");
360 return -EINVAL;
361 }
362 if (!tfo->tpg_get_tag) {
363 pr_err("Missing tfo->tpg_get_tag()\n");
364 return -EINVAL;
365 }
366 if (!tfo->tpg_check_demo_mode) {
367 pr_err("Missing tfo->tpg_check_demo_mode()\n");
368 return -EINVAL;
369 }
370 if (!tfo->tpg_check_demo_mode_cache) {
371 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
372 return -EINVAL;
373 }
374 if (!tfo->tpg_check_demo_mode_write_protect) {
375 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
376 return -EINVAL;
377 }
378 if (!tfo->tpg_check_prod_mode_write_protect) {
379 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
380 return -EINVAL;
381 }
382 if (!tfo->tpg_get_inst_index) {
383 pr_err("Missing tfo->tpg_get_inst_index()\n");
384 return -EINVAL;
385 }
386 if (!tfo->release_cmd) {
387 pr_err("Missing tfo->release_cmd()\n");
388 return -EINVAL;
389 }
390 if (!tfo->sess_get_index) {
391 pr_err("Missing tfo->sess_get_index()\n");
392 return -EINVAL;
393 }
394 if (!tfo->write_pending) {
395 pr_err("Missing tfo->write_pending()\n");
396 return -EINVAL;
397 }
398 if (!tfo->write_pending_status) {
399 pr_err("Missing tfo->write_pending_status()\n");
400 return -EINVAL;
401 }
402 if (!tfo->set_default_node_attributes) {
403 pr_err("Missing tfo->set_default_node_attributes()\n");
404 return -EINVAL;
405 }
406 if (!tfo->get_cmd_state) {
407 pr_err("Missing tfo->get_cmd_state()\n");
408 return -EINVAL;
409 }
410 if (!tfo->queue_data_in) {
411 pr_err("Missing tfo->queue_data_in()\n");
412 return -EINVAL;
413 }
414 if (!tfo->queue_status) {
415 pr_err("Missing tfo->queue_status()\n");
416 return -EINVAL;
417 }
418 if (!tfo->queue_tm_rsp) {
419 pr_err("Missing tfo->queue_tm_rsp()\n");
420 return -EINVAL;
421 }
422 if (!tfo->aborted_task) {
423 pr_err("Missing tfo->aborted_task()\n");
424 return -EINVAL;
425 }
426 if (!tfo->check_stop_free) {
427 pr_err("Missing tfo->check_stop_free()\n");
428 return -EINVAL;
429 }
430 /*
431 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
432 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
433 * target_core_fabric_configfs.c WWN+TPG group context code.
434 */
435 if (!tfo->fabric_make_wwn) {
436 pr_err("Missing tfo->fabric_make_wwn()\n");
437 return -EINVAL;
438 }
439 if (!tfo->fabric_drop_wwn) {
440 pr_err("Missing tfo->fabric_drop_wwn()\n");
441 return -EINVAL;
442 }
443 if (!tfo->fabric_make_tpg) {
444 pr_err("Missing tfo->fabric_make_tpg()\n");
445 return -EINVAL;
446 }
447 if (!tfo->fabric_drop_tpg) {
448 pr_err("Missing tfo->fabric_drop_tpg()\n");
449 return -EINVAL;
450 }
451
452 return 0;
453 }
454
455 int target_register_template(const struct target_core_fabric_ops *fo)
456 {
457 struct target_fabric_configfs *tf;
458 int ret;
459
460 ret = target_fabric_tf_ops_check(fo);
461 if (ret)
462 return ret;
463
464 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
465 if (!tf) {
466 pr_err("%s: could not allocate memory!\n", __func__);
467 return -ENOMEM;
468 }
469
470 INIT_LIST_HEAD(&tf->tf_list);
471 atomic_set(&tf->tf_access_cnt, 0);
472 tf->tf_ops = fo;
473 target_fabric_setup_cits(tf);
474
475 mutex_lock(&g_tf_lock);
476 list_add_tail(&tf->tf_list, &g_tf_list);
477 mutex_unlock(&g_tf_lock);
478
479 return 0;
480 }
481 EXPORT_SYMBOL(target_register_template);
482
483 void target_unregister_template(const struct target_core_fabric_ops *fo)
484 {
485 struct target_fabric_configfs *t;
486
487 mutex_lock(&g_tf_lock);
488 list_for_each_entry(t, &g_tf_list, tf_list) {
489 if (!strcmp(t->tf_ops->name, fo->name)) {
490 BUG_ON(atomic_read(&t->tf_access_cnt));
491 list_del(&t->tf_list);
492 mutex_unlock(&g_tf_lock);
493 /*
494 * Wait for any outstanding fabric se_deve_entry->rcu_head
495 * callbacks to complete post kfree_rcu(), before allowing
496 * fabric driver unload of TFO->module to proceed.
497 */
498 rcu_barrier();
499 kfree(t);
500 return;
501 }
502 }
503 mutex_unlock(&g_tf_lock);
504 }
505 EXPORT_SYMBOL(target_unregister_template);
506
507 /*##############################################################################
508 // Stop functions called by external Target Fabrics Modules
509 //############################################################################*/
510
511 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
512 {
513 return container_of(to_config_group(item), struct se_dev_attrib,
514 da_group);
515 }
516
517 /* Start functions for struct config_item_type tb_dev_attrib_cit */
518 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
519 static ssize_t _name##_show(struct config_item *item, char *page) \
520 { \
521 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
522 }
523
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
533 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
535 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
536 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
537 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
538 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
539 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
540 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
541 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
542 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
543 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
544 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
545 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
546 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
547 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
548 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
549 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
550 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
551 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
552 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
553 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
554 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
555
556 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
557 static ssize_t _name##_store(struct config_item *item, const char *page,\
558 size_t count) \
559 { \
560 struct se_dev_attrib *da = to_attrib(item); \
561 u32 val; \
562 int ret; \
563 \
564 ret = kstrtou32(page, 0, &val); \
565 if (ret < 0) \
566 return ret; \
567 da->_name = val; \
568 return count; \
569 }
570
571 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
572 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
573 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
574 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
575 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
576
577 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
578 static ssize_t _name##_store(struct config_item *item, const char *page, \
579 size_t count) \
580 { \
581 struct se_dev_attrib *da = to_attrib(item); \
582 bool flag; \
583 int ret; \
584 \
585 ret = strtobool(page, &flag); \
586 if (ret < 0) \
587 return ret; \
588 da->_name = flag; \
589 return count; \
590 }
591
592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
593 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
594 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
595 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
596 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
597
598 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
599 static ssize_t _name##_store(struct config_item *item, const char *page,\
600 size_t count) \
601 { \
602 printk_once(KERN_WARNING \
603 "ignoring deprecated %s attribute\n", \
604 __stringify(_name)); \
605 return count; \
606 }
607
608 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
609 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
610
611 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
612 {
613 const char *configname;
614
615 configname = config_item_name(&dev->dev_group.cg_item);
616 if (strlen(configname) >= 16) {
617 pr_warn("dev[%p]: Backstore name '%s' is too long for "
618 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
619 configname);
620 }
621 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
622 }
623
624 static ssize_t emulate_model_alias_store(struct config_item *item,
625 const char *page, size_t count)
626 {
627 struct se_dev_attrib *da = to_attrib(item);
628 struct se_device *dev = da->da_dev;
629 bool flag;
630 int ret;
631
632 if (dev->export_count) {
633 pr_err("dev[%p]: Unable to change model alias"
634 " while export_count is %d\n",
635 dev, dev->export_count);
636 return -EINVAL;
637 }
638
639 ret = strtobool(page, &flag);
640 if (ret < 0)
641 return ret;
642
643 if (flag) {
644 dev_set_t10_wwn_model_alias(dev);
645 } else {
646 strncpy(&dev->t10_wwn.model[0],
647 dev->transport->inquiry_prod, 16);
648 }
649 da->emulate_model_alias = flag;
650 return count;
651 }
652
653 static ssize_t emulate_write_cache_store(struct config_item *item,
654 const char *page, size_t count)
655 {
656 struct se_dev_attrib *da = to_attrib(item);
657 bool flag;
658 int ret;
659
660 ret = strtobool(page, &flag);
661 if (ret < 0)
662 return ret;
663
664 if (flag && da->da_dev->transport->get_write_cache) {
665 pr_err("emulate_write_cache not supported for this device\n");
666 return -EINVAL;
667 }
668
669 da->emulate_write_cache = flag;
670 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
671 da->da_dev, flag);
672 return count;
673 }
674
675 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
676 const char *page, size_t count)
677 {
678 struct se_dev_attrib *da = to_attrib(item);
679 u32 val;
680 int ret;
681
682 ret = kstrtou32(page, 0, &val);
683 if (ret < 0)
684 return ret;
685
686 if (val != 0 && val != 1 && val != 2) {
687 pr_err("Illegal value %d\n", val);
688 return -EINVAL;
689 }
690
691 if (da->da_dev->export_count) {
692 pr_err("dev[%p]: Unable to change SE Device"
693 " UA_INTRLCK_CTRL while export_count is %d\n",
694 da->da_dev, da->da_dev->export_count);
695 return -EINVAL;
696 }
697 da->emulate_ua_intlck_ctrl = val;
698 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
699 da->da_dev, val);
700 return count;
701 }
702
703 static ssize_t emulate_tas_store(struct config_item *item,
704 const char *page, size_t count)
705 {
706 struct se_dev_attrib *da = to_attrib(item);
707 bool flag;
708 int ret;
709
710 ret = strtobool(page, &flag);
711 if (ret < 0)
712 return ret;
713
714 if (da->da_dev->export_count) {
715 pr_err("dev[%p]: Unable to change SE Device TAS while"
716 " export_count is %d\n",
717 da->da_dev, da->da_dev->export_count);
718 return -EINVAL;
719 }
720 da->emulate_tas = flag;
721 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
722 da->da_dev, flag ? "Enabled" : "Disabled");
723
724 return count;
725 }
726
727 static ssize_t emulate_tpu_store(struct config_item *item,
728 const char *page, size_t count)
729 {
730 struct se_dev_attrib *da = to_attrib(item);
731 bool flag;
732 int ret;
733
734 ret = strtobool(page, &flag);
735 if (ret < 0)
736 return ret;
737
738 /*
739 * We expect this value to be non-zero when generic Block Layer
740 * Discard supported is detected iblock_create_virtdevice().
741 */
742 if (flag && !da->max_unmap_block_desc_count) {
743 pr_err("Generic Block Discard not supported\n");
744 return -ENOSYS;
745 }
746
747 da->emulate_tpu = flag;
748 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
749 da->da_dev, flag);
750 return count;
751 }
752
753 static ssize_t emulate_tpws_store(struct config_item *item,
754 const char *page, size_t count)
755 {
756 struct se_dev_attrib *da = to_attrib(item);
757 bool flag;
758 int ret;
759
760 ret = strtobool(page, &flag);
761 if (ret < 0)
762 return ret;
763
764 /*
765 * We expect this value to be non-zero when generic Block Layer
766 * Discard supported is detected iblock_create_virtdevice().
767 */
768 if (flag && !da->max_unmap_block_desc_count) {
769 pr_err("Generic Block Discard not supported\n");
770 return -ENOSYS;
771 }
772
773 da->emulate_tpws = flag;
774 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
775 da->da_dev, flag);
776 return count;
777 }
778
779 static ssize_t pi_prot_type_store(struct config_item *item,
780 const char *page, size_t count)
781 {
782 struct se_dev_attrib *da = to_attrib(item);
783 int old_prot = da->pi_prot_type, ret;
784 struct se_device *dev = da->da_dev;
785 u32 flag;
786
787 ret = kstrtou32(page, 0, &flag);
788 if (ret < 0)
789 return ret;
790
791 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
792 pr_err("Illegal value %d for pi_prot_type\n", flag);
793 return -EINVAL;
794 }
795 if (flag == 2) {
796 pr_err("DIF TYPE2 protection currently not supported\n");
797 return -ENOSYS;
798 }
799 if (da->hw_pi_prot_type) {
800 pr_warn("DIF protection enabled on underlying hardware,"
801 " ignoring\n");
802 return count;
803 }
804 if (!dev->transport->init_prot || !dev->transport->free_prot) {
805 /* 0 is only allowed value for non-supporting backends */
806 if (flag == 0)
807 return count;
808
809 pr_err("DIF protection not supported by backend: %s\n",
810 dev->transport->name);
811 return -ENOSYS;
812 }
813 if (!target_dev_configured(dev)) {
814 pr_err("DIF protection requires device to be configured\n");
815 return -ENODEV;
816 }
817 if (dev->export_count) {
818 pr_err("dev[%p]: Unable to change SE Device PROT type while"
819 " export_count is %d\n", dev, dev->export_count);
820 return -EINVAL;
821 }
822
823 da->pi_prot_type = flag;
824
825 if (flag && !old_prot) {
826 ret = dev->transport->init_prot(dev);
827 if (ret) {
828 da->pi_prot_type = old_prot;
829 da->pi_prot_verify = (bool) da->pi_prot_type;
830 return ret;
831 }
832
833 } else if (!flag && old_prot) {
834 dev->transport->free_prot(dev);
835 }
836
837 da->pi_prot_verify = (bool) da->pi_prot_type;
838 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
839 return count;
840 }
841
842 static ssize_t pi_prot_format_store(struct config_item *item,
843 const char *page, size_t count)
844 {
845 struct se_dev_attrib *da = to_attrib(item);
846 struct se_device *dev = da->da_dev;
847 bool flag;
848 int ret;
849
850 ret = strtobool(page, &flag);
851 if (ret < 0)
852 return ret;
853
854 if (!flag)
855 return count;
856
857 if (!dev->transport->format_prot) {
858 pr_err("DIF protection format not supported by backend %s\n",
859 dev->transport->name);
860 return -ENOSYS;
861 }
862 if (!target_dev_configured(dev)) {
863 pr_err("DIF protection format requires device to be configured\n");
864 return -ENODEV;
865 }
866 if (dev->export_count) {
867 pr_err("dev[%p]: Unable to format SE Device PROT type while"
868 " export_count is %d\n", dev, dev->export_count);
869 return -EINVAL;
870 }
871
872 ret = dev->transport->format_prot(dev);
873 if (ret)
874 return ret;
875
876 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
877 return count;
878 }
879
880 static ssize_t pi_prot_verify_store(struct config_item *item,
881 const char *page, size_t count)
882 {
883 struct se_dev_attrib *da = to_attrib(item);
884 bool flag;
885 int ret;
886
887 ret = strtobool(page, &flag);
888 if (ret < 0)
889 return ret;
890
891 if (!flag) {
892 da->pi_prot_verify = flag;
893 return count;
894 }
895 if (da->hw_pi_prot_type) {
896 pr_warn("DIF protection enabled on underlying hardware,"
897 " ignoring\n");
898 return count;
899 }
900 if (!da->pi_prot_type) {
901 pr_warn("DIF protection not supported by backend, ignoring\n");
902 return count;
903 }
904 da->pi_prot_verify = flag;
905
906 return count;
907 }
908
909 static ssize_t force_pr_aptpl_store(struct config_item *item,
910 const char *page, size_t count)
911 {
912 struct se_dev_attrib *da = to_attrib(item);
913 bool flag;
914 int ret;
915
916 ret = strtobool(page, &flag);
917 if (ret < 0)
918 return ret;
919 if (da->da_dev->export_count) {
920 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
921 " export_count is %d\n",
922 da->da_dev, da->da_dev->export_count);
923 return -EINVAL;
924 }
925
926 da->force_pr_aptpl = flag;
927 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
928 return count;
929 }
930
931 static ssize_t emulate_rest_reord_store(struct config_item *item,
932 const char *page, size_t count)
933 {
934 struct se_dev_attrib *da = to_attrib(item);
935 bool flag;
936 int ret;
937
938 ret = strtobool(page, &flag);
939 if (ret < 0)
940 return ret;
941
942 if (flag != 0) {
943 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
944 " reordering not implemented\n", da->da_dev);
945 return -ENOSYS;
946 }
947 da->emulate_rest_reord = flag;
948 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
949 da->da_dev, flag);
950 return count;
951 }
952
953 static ssize_t unmap_zeroes_data_store(struct config_item *item,
954 const char *page, size_t count)
955 {
956 struct se_dev_attrib *da = to_attrib(item);
957 bool flag;
958 int ret;
959
960 ret = strtobool(page, &flag);
961 if (ret < 0)
962 return ret;
963
964 if (da->da_dev->export_count) {
965 pr_err("dev[%p]: Unable to change SE Device"
966 " unmap_zeroes_data while export_count is %d\n",
967 da->da_dev, da->da_dev->export_count);
968 return -EINVAL;
969 }
970 /*
971 * We expect this value to be non-zero when generic Block Layer
972 * Discard supported is detected iblock_configure_device().
973 */
974 if (flag && !da->max_unmap_block_desc_count) {
975 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
976 " because max_unmap_block_desc_count is zero\n",
977 da->da_dev);
978 return -ENOSYS;
979 }
980 da->unmap_zeroes_data = flag;
981 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
982 da->da_dev, flag);
983 return count;
984 }
985
986 /*
987 * Note, this can only be called on unexported SE Device Object.
988 */
989 static ssize_t queue_depth_store(struct config_item *item,
990 const char *page, size_t count)
991 {
992 struct se_dev_attrib *da = to_attrib(item);
993 struct se_device *dev = da->da_dev;
994 u32 val;
995 int ret;
996
997 ret = kstrtou32(page, 0, &val);
998 if (ret < 0)
999 return ret;
1000
1001 if (dev->export_count) {
1002 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1003 " export_count is %d\n",
1004 dev, dev->export_count);
1005 return -EINVAL;
1006 }
1007 if (!val) {
1008 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1009 return -EINVAL;
1010 }
1011
1012 if (val > dev->dev_attrib.queue_depth) {
1013 if (val > dev->dev_attrib.hw_queue_depth) {
1014 pr_err("dev[%p]: Passed queue_depth:"
1015 " %u exceeds TCM/SE_Device MAX"
1016 " TCQ: %u\n", dev, val,
1017 dev->dev_attrib.hw_queue_depth);
1018 return -EINVAL;
1019 }
1020 }
1021 da->queue_depth = dev->queue_depth = val;
1022 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1023 return count;
1024 }
1025
1026 static ssize_t optimal_sectors_store(struct config_item *item,
1027 const char *page, size_t count)
1028 {
1029 struct se_dev_attrib *da = to_attrib(item);
1030 u32 val;
1031 int ret;
1032
1033 ret = kstrtou32(page, 0, &val);
1034 if (ret < 0)
1035 return ret;
1036
1037 if (da->da_dev->export_count) {
1038 pr_err("dev[%p]: Unable to change SE Device"
1039 " optimal_sectors while export_count is %d\n",
1040 da->da_dev, da->da_dev->export_count);
1041 return -EINVAL;
1042 }
1043 if (val > da->hw_max_sectors) {
1044 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1045 " greater than hw_max_sectors: %u\n",
1046 da->da_dev, val, da->hw_max_sectors);
1047 return -EINVAL;
1048 }
1049
1050 da->optimal_sectors = val;
1051 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1052 da->da_dev, val);
1053 return count;
1054 }
1055
1056 static ssize_t block_size_store(struct config_item *item,
1057 const char *page, size_t count)
1058 {
1059 struct se_dev_attrib *da = to_attrib(item);
1060 u32 val;
1061 int ret;
1062
1063 ret = kstrtou32(page, 0, &val);
1064 if (ret < 0)
1065 return ret;
1066
1067 if (da->da_dev->export_count) {
1068 pr_err("dev[%p]: Unable to change SE Device block_size"
1069 " while export_count is %d\n",
1070 da->da_dev, da->da_dev->export_count);
1071 return -EINVAL;
1072 }
1073
1074 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1075 pr_err("dev[%p]: Illegal value for block_device: %u"
1076 " for SE device, must be 512, 1024, 2048 or 4096\n",
1077 da->da_dev, val);
1078 return -EINVAL;
1079 }
1080
1081 da->block_size = val;
1082 if (da->max_bytes_per_io)
1083 da->hw_max_sectors = da->max_bytes_per_io / val;
1084
1085 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1086 da->da_dev, val);
1087 return count;
1088 }
1089
1090 static ssize_t alua_support_show(struct config_item *item, char *page)
1091 {
1092 struct se_dev_attrib *da = to_attrib(item);
1093 u8 flags = da->da_dev->transport->transport_flags;
1094
1095 return snprintf(page, PAGE_SIZE, "%d\n",
1096 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1097 }
1098
1099 static ssize_t pgr_support_show(struct config_item *item, char *page)
1100 {
1101 struct se_dev_attrib *da = to_attrib(item);
1102 u8 flags = da->da_dev->transport->transport_flags;
1103
1104 return snprintf(page, PAGE_SIZE, "%d\n",
1105 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1106 }
1107
1108 CONFIGFS_ATTR(, emulate_model_alias);
1109 CONFIGFS_ATTR(, emulate_dpo);
1110 CONFIGFS_ATTR(, emulate_fua_write);
1111 CONFIGFS_ATTR(, emulate_fua_read);
1112 CONFIGFS_ATTR(, emulate_write_cache);
1113 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1114 CONFIGFS_ATTR(, emulate_tas);
1115 CONFIGFS_ATTR(, emulate_tpu);
1116 CONFIGFS_ATTR(, emulate_tpws);
1117 CONFIGFS_ATTR(, emulate_caw);
1118 CONFIGFS_ATTR(, emulate_3pc);
1119 CONFIGFS_ATTR(, pi_prot_type);
1120 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1121 CONFIGFS_ATTR(, pi_prot_format);
1122 CONFIGFS_ATTR(, pi_prot_verify);
1123 CONFIGFS_ATTR(, enforce_pr_isids);
1124 CONFIGFS_ATTR(, is_nonrot);
1125 CONFIGFS_ATTR(, emulate_rest_reord);
1126 CONFIGFS_ATTR(, force_pr_aptpl);
1127 CONFIGFS_ATTR_RO(, hw_block_size);
1128 CONFIGFS_ATTR(, block_size);
1129 CONFIGFS_ATTR_RO(, hw_max_sectors);
1130 CONFIGFS_ATTR(, optimal_sectors);
1131 CONFIGFS_ATTR_RO(, hw_queue_depth);
1132 CONFIGFS_ATTR(, queue_depth);
1133 CONFIGFS_ATTR(, max_unmap_lba_count);
1134 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1135 CONFIGFS_ATTR(, unmap_granularity);
1136 CONFIGFS_ATTR(, unmap_granularity_alignment);
1137 CONFIGFS_ATTR(, unmap_zeroes_data);
1138 CONFIGFS_ATTR(, max_write_same_len);
1139 CONFIGFS_ATTR_RO(, alua_support);
1140 CONFIGFS_ATTR_RO(, pgr_support);
1141
1142 /*
1143 * dev_attrib attributes for devices using the target core SBC/SPC
1144 * interpreter. Any backend using spc_parse_cdb should be using
1145 * these.
1146 */
1147 struct configfs_attribute *sbc_attrib_attrs[] = {
1148 &attr_emulate_model_alias,
1149 &attr_emulate_dpo,
1150 &attr_emulate_fua_write,
1151 &attr_emulate_fua_read,
1152 &attr_emulate_write_cache,
1153 &attr_emulate_ua_intlck_ctrl,
1154 &attr_emulate_tas,
1155 &attr_emulate_tpu,
1156 &attr_emulate_tpws,
1157 &attr_emulate_caw,
1158 &attr_emulate_3pc,
1159 &attr_pi_prot_type,
1160 &attr_hw_pi_prot_type,
1161 &attr_pi_prot_format,
1162 &attr_pi_prot_verify,
1163 &attr_enforce_pr_isids,
1164 &attr_is_nonrot,
1165 &attr_emulate_rest_reord,
1166 &attr_force_pr_aptpl,
1167 &attr_hw_block_size,
1168 &attr_block_size,
1169 &attr_hw_max_sectors,
1170 &attr_optimal_sectors,
1171 &attr_hw_queue_depth,
1172 &attr_queue_depth,
1173 &attr_max_unmap_lba_count,
1174 &attr_max_unmap_block_desc_count,
1175 &attr_unmap_granularity,
1176 &attr_unmap_granularity_alignment,
1177 &attr_unmap_zeroes_data,
1178 &attr_max_write_same_len,
1179 &attr_alua_support,
1180 &attr_pgr_support,
1181 NULL,
1182 };
1183 EXPORT_SYMBOL(sbc_attrib_attrs);
1184
1185 /*
1186 * Minimal dev_attrib attributes for devices passing through CDBs.
1187 * In this case we only provide a few read-only attributes for
1188 * backwards compatibility.
1189 */
1190 struct configfs_attribute *passthrough_attrib_attrs[] = {
1191 &attr_hw_pi_prot_type,
1192 &attr_hw_block_size,
1193 &attr_hw_max_sectors,
1194 &attr_hw_queue_depth,
1195 &attr_alua_support,
1196 &attr_pgr_support,
1197 NULL,
1198 };
1199 EXPORT_SYMBOL(passthrough_attrib_attrs);
1200
1201 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1202 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1203
1204 /* End functions for struct config_item_type tb_dev_attrib_cit */
1205
1206 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1207
1208 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1209 {
1210 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1211 }
1212
1213 /*
1214 * VPD page 0x80 Unit serial
1215 */
1216 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1217 char *page)
1218 {
1219 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1220 &to_t10_wwn(item)->unit_serial[0]);
1221 }
1222
1223 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1224 const char *page, size_t count)
1225 {
1226 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1227 struct se_device *dev = t10_wwn->t10_dev;
1228 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1229
1230 /*
1231 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1232 * from the struct scsi_device level firmware, do not allow
1233 * VPD Unit Serial to be emulated.
1234 *
1235 * Note this struct scsi_device could also be emulating VPD
1236 * information from its drivers/scsi LLD. But for now we assume
1237 * it is doing 'the right thing' wrt a world wide unique
1238 * VPD Unit Serial Number that OS dependent multipath can depend on.
1239 */
1240 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1241 pr_err("Underlying SCSI device firmware provided VPD"
1242 " Unit Serial, ignoring request\n");
1243 return -EOPNOTSUPP;
1244 }
1245
1246 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1247 pr_err("Emulated VPD Unit Serial exceeds"
1248 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1249 return -EOVERFLOW;
1250 }
1251 /*
1252 * Check to see if any active $FABRIC_MOD exports exist. If they
1253 * do exist, fail here as changing this information on the fly
1254 * (underneath the initiator side OS dependent multipath code)
1255 * could cause negative effects.
1256 */
1257 if (dev->export_count) {
1258 pr_err("Unable to set VPD Unit Serial while"
1259 " active %d $FABRIC_MOD exports exist\n",
1260 dev->export_count);
1261 return -EINVAL;
1262 }
1263
1264 /*
1265 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1266 *
1267 * Also, strip any newline added from the userspace
1268 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1269 */
1270 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1271 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1272 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1273 "%s", strstrip(buf));
1274 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1275
1276 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1277 " %s\n", dev->t10_wwn.unit_serial);
1278
1279 return count;
1280 }
1281
1282 /*
1283 * VPD page 0x83 Protocol Identifier
1284 */
1285 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1286 char *page)
1287 {
1288 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1289 struct t10_vpd *vpd;
1290 unsigned char buf[VPD_TMP_BUF_SIZE];
1291 ssize_t len = 0;
1292
1293 memset(buf, 0, VPD_TMP_BUF_SIZE);
1294
1295 spin_lock(&t10_wwn->t10_vpd_lock);
1296 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1297 if (!vpd->protocol_identifier_set)
1298 continue;
1299
1300 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1301
1302 if (len + strlen(buf) >= PAGE_SIZE)
1303 break;
1304
1305 len += sprintf(page+len, "%s", buf);
1306 }
1307 spin_unlock(&t10_wwn->t10_vpd_lock);
1308
1309 return len;
1310 }
1311
1312 /*
1313 * Generic wrapper for dumping VPD identifiers by association.
1314 */
1315 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1316 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1317 char *page) \
1318 { \
1319 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1320 struct t10_vpd *vpd; \
1321 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1322 ssize_t len = 0; \
1323 \
1324 spin_lock(&t10_wwn->t10_vpd_lock); \
1325 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1326 if (vpd->association != _assoc) \
1327 continue; \
1328 \
1329 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1330 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1331 if (len + strlen(buf) >= PAGE_SIZE) \
1332 break; \
1333 len += sprintf(page+len, "%s", buf); \
1334 \
1335 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1336 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1337 if (len + strlen(buf) >= PAGE_SIZE) \
1338 break; \
1339 len += sprintf(page+len, "%s", buf); \
1340 \
1341 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1342 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1343 if (len + strlen(buf) >= PAGE_SIZE) \
1344 break; \
1345 len += sprintf(page+len, "%s", buf); \
1346 } \
1347 spin_unlock(&t10_wwn->t10_vpd_lock); \
1348 \
1349 return len; \
1350 }
1351
1352 /* VPD page 0x83 Association: Logical Unit */
1353 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1354 /* VPD page 0x83 Association: Target Port */
1355 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1356 /* VPD page 0x83 Association: SCSI Target Device */
1357 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1358
1359 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1360 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1361 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1362 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1363 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1364
1365 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1366 &target_wwn_attr_vpd_unit_serial,
1367 &target_wwn_attr_vpd_protocol_identifier,
1368 &target_wwn_attr_vpd_assoc_logical_unit,
1369 &target_wwn_attr_vpd_assoc_target_port,
1370 &target_wwn_attr_vpd_assoc_scsi_target_device,
1371 NULL,
1372 };
1373
1374 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1375
1376 /* End functions for struct config_item_type tb_dev_wwn_cit */
1377
1378 /* Start functions for struct config_item_type tb_dev_pr_cit */
1379
1380 static struct se_device *pr_to_dev(struct config_item *item)
1381 {
1382 return container_of(to_config_group(item), struct se_device,
1383 dev_pr_group);
1384 }
1385
1386 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1387 char *page)
1388 {
1389 struct se_node_acl *se_nacl;
1390 struct t10_pr_registration *pr_reg;
1391 char i_buf[PR_REG_ISID_ID_LEN];
1392
1393 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1394
1395 pr_reg = dev->dev_pr_res_holder;
1396 if (!pr_reg)
1397 return sprintf(page, "No SPC-3 Reservation holder\n");
1398
1399 se_nacl = pr_reg->pr_reg_nacl;
1400 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1401
1402 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1403 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1404 se_nacl->initiatorname, i_buf);
1405 }
1406
1407 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1408 char *page)
1409 {
1410 struct se_node_acl *se_nacl;
1411 ssize_t len;
1412
1413 se_nacl = dev->dev_reserved_node_acl;
1414 if (se_nacl) {
1415 len = sprintf(page,
1416 "SPC-2 Reservation: %s Initiator: %s\n",
1417 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1418 se_nacl->initiatorname);
1419 } else {
1420 len = sprintf(page, "No SPC-2 Reservation holder\n");
1421 }
1422 return len;
1423 }
1424
1425 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1426 {
1427 struct se_device *dev = pr_to_dev(item);
1428 int ret;
1429
1430 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1431 return sprintf(page, "Passthrough\n");
1432
1433 spin_lock(&dev->dev_reservation_lock);
1434 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1435 ret = target_core_dev_pr_show_spc2_res(dev, page);
1436 else
1437 ret = target_core_dev_pr_show_spc3_res(dev, page);
1438 spin_unlock(&dev->dev_reservation_lock);
1439 return ret;
1440 }
1441
1442 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1443 char *page)
1444 {
1445 struct se_device *dev = pr_to_dev(item);
1446 ssize_t len = 0;
1447
1448 spin_lock(&dev->dev_reservation_lock);
1449 if (!dev->dev_pr_res_holder) {
1450 len = sprintf(page, "No SPC-3 Reservation holder\n");
1451 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1452 len = sprintf(page, "SPC-3 Reservation: All Target"
1453 " Ports registration\n");
1454 } else {
1455 len = sprintf(page, "SPC-3 Reservation: Single"
1456 " Target Port registration\n");
1457 }
1458
1459 spin_unlock(&dev->dev_reservation_lock);
1460 return len;
1461 }
1462
1463 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1464 char *page)
1465 {
1466 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1467 }
1468
1469
1470 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1471 char *page)
1472 {
1473 struct se_device *dev = pr_to_dev(item);
1474 struct se_node_acl *se_nacl;
1475 struct se_portal_group *se_tpg;
1476 struct t10_pr_registration *pr_reg;
1477 const struct target_core_fabric_ops *tfo;
1478 ssize_t len = 0;
1479
1480 spin_lock(&dev->dev_reservation_lock);
1481 pr_reg = dev->dev_pr_res_holder;
1482 if (!pr_reg) {
1483 len = sprintf(page, "No SPC-3 Reservation holder\n");
1484 goto out_unlock;
1485 }
1486
1487 se_nacl = pr_reg->pr_reg_nacl;
1488 se_tpg = se_nacl->se_tpg;
1489 tfo = se_tpg->se_tpg_tfo;
1490
1491 len += sprintf(page+len, "SPC-3 Reservation: %s"
1492 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1493 tfo->tpg_get_wwn(se_tpg));
1494 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1495 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1496 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1497 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1498 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1499
1500 out_unlock:
1501 spin_unlock(&dev->dev_reservation_lock);
1502 return len;
1503 }
1504
1505
1506 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1507 char *page)
1508 {
1509 struct se_device *dev = pr_to_dev(item);
1510 const struct target_core_fabric_ops *tfo;
1511 struct t10_pr_registration *pr_reg;
1512 unsigned char buf[384];
1513 char i_buf[PR_REG_ISID_ID_LEN];
1514 ssize_t len = 0;
1515 int reg_count = 0;
1516
1517 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1518
1519 spin_lock(&dev->t10_pr.registration_lock);
1520 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1521 pr_reg_list) {
1522
1523 memset(buf, 0, 384);
1524 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1525 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1526 core_pr_dump_initiator_port(pr_reg, i_buf,
1527 PR_REG_ISID_ID_LEN);
1528 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1529 tfo->get_fabric_name(),
1530 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1531 pr_reg->pr_res_generation);
1532
1533 if (len + strlen(buf) >= PAGE_SIZE)
1534 break;
1535
1536 len += sprintf(page+len, "%s", buf);
1537 reg_count++;
1538 }
1539 spin_unlock(&dev->t10_pr.registration_lock);
1540
1541 if (!reg_count)
1542 len += sprintf(page+len, "None\n");
1543
1544 return len;
1545 }
1546
1547 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1548 {
1549 struct se_device *dev = pr_to_dev(item);
1550 struct t10_pr_registration *pr_reg;
1551 ssize_t len = 0;
1552
1553 spin_lock(&dev->dev_reservation_lock);
1554 pr_reg = dev->dev_pr_res_holder;
1555 if (pr_reg) {
1556 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1557 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1558 } else {
1559 len = sprintf(page, "No SPC-3 Reservation holder\n");
1560 }
1561
1562 spin_unlock(&dev->dev_reservation_lock);
1563 return len;
1564 }
1565
1566 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1567 {
1568 struct se_device *dev = pr_to_dev(item);
1569
1570 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1571 return sprintf(page, "SPC_PASSTHROUGH\n");
1572 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1573 return sprintf(page, "SPC2_RESERVATIONS\n");
1574 else
1575 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1576 }
1577
1578 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1579 char *page)
1580 {
1581 struct se_device *dev = pr_to_dev(item);
1582
1583 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1584 return 0;
1585
1586 return sprintf(page, "APTPL Bit Status: %s\n",
1587 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1588 }
1589
1590 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1591 char *page)
1592 {
1593 struct se_device *dev = pr_to_dev(item);
1594
1595 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1596 return 0;
1597
1598 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1599 }
1600
1601 enum {
1602 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1603 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1604 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1605 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1606 };
1607
1608 static match_table_t tokens = {
1609 {Opt_initiator_fabric, "initiator_fabric=%s"},
1610 {Opt_initiator_node, "initiator_node=%s"},
1611 {Opt_initiator_sid, "initiator_sid=%s"},
1612 {Opt_sa_res_key, "sa_res_key=%s"},
1613 {Opt_res_holder, "res_holder=%d"},
1614 {Opt_res_type, "res_type=%d"},
1615 {Opt_res_scope, "res_scope=%d"},
1616 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1617 {Opt_mapped_lun, "mapped_lun=%u"},
1618 {Opt_target_fabric, "target_fabric=%s"},
1619 {Opt_target_node, "target_node=%s"},
1620 {Opt_tpgt, "tpgt=%d"},
1621 {Opt_port_rtpi, "port_rtpi=%d"},
1622 {Opt_target_lun, "target_lun=%u"},
1623 {Opt_err, NULL}
1624 };
1625
1626 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1627 const char *page, size_t count)
1628 {
1629 struct se_device *dev = pr_to_dev(item);
1630 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1631 unsigned char *t_fabric = NULL, *t_port = NULL;
1632 char *orig, *ptr, *opts;
1633 substring_t args[MAX_OPT_ARGS];
1634 unsigned long long tmp_ll;
1635 u64 sa_res_key = 0;
1636 u64 mapped_lun = 0, target_lun = 0;
1637 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1638 u16 tpgt = 0;
1639 u8 type = 0;
1640
1641 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1642 return count;
1643 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1644 return count;
1645
1646 if (dev->export_count) {
1647 pr_debug("Unable to process APTPL metadata while"
1648 " active fabric exports exist\n");
1649 return -EINVAL;
1650 }
1651
1652 opts = kstrdup(page, GFP_KERNEL);
1653 if (!opts)
1654 return -ENOMEM;
1655
1656 orig = opts;
1657 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1658 if (!*ptr)
1659 continue;
1660
1661 token = match_token(ptr, tokens, args);
1662 switch (token) {
1663 case Opt_initiator_fabric:
1664 i_fabric = match_strdup(args);
1665 if (!i_fabric) {
1666 ret = -ENOMEM;
1667 goto out;
1668 }
1669 break;
1670 case Opt_initiator_node:
1671 i_port = match_strdup(args);
1672 if (!i_port) {
1673 ret = -ENOMEM;
1674 goto out;
1675 }
1676 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1677 pr_err("APTPL metadata initiator_node="
1678 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1679 PR_APTPL_MAX_IPORT_LEN);
1680 ret = -EINVAL;
1681 break;
1682 }
1683 break;
1684 case Opt_initiator_sid:
1685 isid = match_strdup(args);
1686 if (!isid) {
1687 ret = -ENOMEM;
1688 goto out;
1689 }
1690 if (strlen(isid) >= PR_REG_ISID_LEN) {
1691 pr_err("APTPL metadata initiator_isid"
1692 "= exceeds PR_REG_ISID_LEN: %d\n",
1693 PR_REG_ISID_LEN);
1694 ret = -EINVAL;
1695 break;
1696 }
1697 break;
1698 case Opt_sa_res_key:
1699 ret = match_u64(args, &tmp_ll);
1700 if (ret < 0) {
1701 pr_err("kstrtoull() failed for sa_res_key=\n");
1702 goto out;
1703 }
1704 sa_res_key = (u64)tmp_ll;
1705 break;
1706 /*
1707 * PR APTPL Metadata for Reservation
1708 */
1709 case Opt_res_holder:
1710 ret = match_int(args, &arg);
1711 if (ret)
1712 goto out;
1713 res_holder = arg;
1714 break;
1715 case Opt_res_type:
1716 ret = match_int(args, &arg);
1717 if (ret)
1718 goto out;
1719 type = (u8)arg;
1720 break;
1721 case Opt_res_scope:
1722 ret = match_int(args, &arg);
1723 if (ret)
1724 goto out;
1725 break;
1726 case Opt_res_all_tg_pt:
1727 ret = match_int(args, &arg);
1728 if (ret)
1729 goto out;
1730 all_tg_pt = (int)arg;
1731 break;
1732 case Opt_mapped_lun:
1733 ret = match_u64(args, &tmp_ll);
1734 if (ret)
1735 goto out;
1736 mapped_lun = (u64)tmp_ll;
1737 break;
1738 /*
1739 * PR APTPL Metadata for Target Port
1740 */
1741 case Opt_target_fabric:
1742 t_fabric = match_strdup(args);
1743 if (!t_fabric) {
1744 ret = -ENOMEM;
1745 goto out;
1746 }
1747 break;
1748 case Opt_target_node:
1749 t_port = match_strdup(args);
1750 if (!t_port) {
1751 ret = -ENOMEM;
1752 goto out;
1753 }
1754 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1755 pr_err("APTPL metadata target_node="
1756 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1757 PR_APTPL_MAX_TPORT_LEN);
1758 ret = -EINVAL;
1759 break;
1760 }
1761 break;
1762 case Opt_tpgt:
1763 ret = match_int(args, &arg);
1764 if (ret)
1765 goto out;
1766 tpgt = (u16)arg;
1767 break;
1768 case Opt_port_rtpi:
1769 ret = match_int(args, &arg);
1770 if (ret)
1771 goto out;
1772 break;
1773 case Opt_target_lun:
1774 ret = match_u64(args, &tmp_ll);
1775 if (ret)
1776 goto out;
1777 target_lun = (u64)tmp_ll;
1778 break;
1779 default:
1780 break;
1781 }
1782 }
1783
1784 if (!i_port || !t_port || !sa_res_key) {
1785 pr_err("Illegal parameters for APTPL registration\n");
1786 ret = -EINVAL;
1787 goto out;
1788 }
1789
1790 if (res_holder && !(type)) {
1791 pr_err("Illegal PR type: 0x%02x for reservation"
1792 " holder\n", type);
1793 ret = -EINVAL;
1794 goto out;
1795 }
1796
1797 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1798 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1799 res_holder, all_tg_pt, type);
1800 out:
1801 kfree(i_fabric);
1802 kfree(i_port);
1803 kfree(isid);
1804 kfree(t_fabric);
1805 kfree(t_port);
1806 kfree(orig);
1807 return (ret == 0) ? count : ret;
1808 }
1809
1810
1811 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1812 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1813 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1814 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1815 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1816 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1817 CONFIGFS_ATTR_RO(target_pr_, res_type);
1818 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1819 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1820
1821 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1822 &target_pr_attr_res_holder,
1823 &target_pr_attr_res_pr_all_tgt_pts,
1824 &target_pr_attr_res_pr_generation,
1825 &target_pr_attr_res_pr_holder_tg_port,
1826 &target_pr_attr_res_pr_registered_i_pts,
1827 &target_pr_attr_res_pr_type,
1828 &target_pr_attr_res_type,
1829 &target_pr_attr_res_aptpl_active,
1830 &target_pr_attr_res_aptpl_metadata,
1831 NULL,
1832 };
1833
1834 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1835
1836 /* End functions for struct config_item_type tb_dev_pr_cit */
1837
1838 /* Start functions for struct config_item_type tb_dev_cit */
1839
1840 static inline struct se_device *to_device(struct config_item *item)
1841 {
1842 return container_of(to_config_group(item), struct se_device, dev_group);
1843 }
1844
1845 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1846 {
1847 struct se_device *dev = to_device(item);
1848 int bl = 0;
1849 ssize_t read_bytes = 0;
1850
1851 transport_dump_dev_state(dev, page, &bl);
1852 read_bytes += bl;
1853 read_bytes += dev->transport->show_configfs_dev_params(dev,
1854 page+read_bytes);
1855 return read_bytes;
1856 }
1857
1858 static ssize_t target_dev_control_store(struct config_item *item,
1859 const char *page, size_t count)
1860 {
1861 struct se_device *dev = to_device(item);
1862
1863 return dev->transport->set_configfs_dev_params(dev, page, count);
1864 }
1865
1866 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1867 {
1868 struct se_device *dev = to_device(item);
1869
1870 if (!(dev->dev_flags & DF_USING_ALIAS))
1871 return 0;
1872
1873 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1874 }
1875
1876 static ssize_t target_dev_alias_store(struct config_item *item,
1877 const char *page, size_t count)
1878 {
1879 struct se_device *dev = to_device(item);
1880 struct se_hba *hba = dev->se_hba;
1881 ssize_t read_bytes;
1882
1883 if (count > (SE_DEV_ALIAS_LEN-1)) {
1884 pr_err("alias count: %d exceeds"
1885 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1886 SE_DEV_ALIAS_LEN-1);
1887 return -EINVAL;
1888 }
1889
1890 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1891 if (!read_bytes)
1892 return -EINVAL;
1893 if (dev->dev_alias[read_bytes - 1] == '\n')
1894 dev->dev_alias[read_bytes - 1] = '\0';
1895
1896 dev->dev_flags |= DF_USING_ALIAS;
1897
1898 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1899 config_item_name(&hba->hba_group.cg_item),
1900 config_item_name(&dev->dev_group.cg_item),
1901 dev->dev_alias);
1902
1903 return read_bytes;
1904 }
1905
1906 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1907 {
1908 struct se_device *dev = to_device(item);
1909
1910 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1911 return 0;
1912
1913 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1914 }
1915
1916 static ssize_t target_dev_udev_path_store(struct config_item *item,
1917 const char *page, size_t count)
1918 {
1919 struct se_device *dev = to_device(item);
1920 struct se_hba *hba = dev->se_hba;
1921 ssize_t read_bytes;
1922
1923 if (count > (SE_UDEV_PATH_LEN-1)) {
1924 pr_err("udev_path count: %d exceeds"
1925 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1926 SE_UDEV_PATH_LEN-1);
1927 return -EINVAL;
1928 }
1929
1930 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1931 "%s", page);
1932 if (!read_bytes)
1933 return -EINVAL;
1934 if (dev->udev_path[read_bytes - 1] == '\n')
1935 dev->udev_path[read_bytes - 1] = '\0';
1936
1937 dev->dev_flags |= DF_USING_UDEV_PATH;
1938
1939 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1940 config_item_name(&hba->hba_group.cg_item),
1941 config_item_name(&dev->dev_group.cg_item),
1942 dev->udev_path);
1943
1944 return read_bytes;
1945 }
1946
1947 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1948 {
1949 struct se_device *dev = to_device(item);
1950
1951 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
1952 }
1953
1954 static ssize_t target_dev_enable_store(struct config_item *item,
1955 const char *page, size_t count)
1956 {
1957 struct se_device *dev = to_device(item);
1958 char *ptr;
1959 int ret;
1960
1961 ptr = strstr(page, "1");
1962 if (!ptr) {
1963 pr_err("For dev_enable ops, only valid value"
1964 " is \"1\"\n");
1965 return -EINVAL;
1966 }
1967
1968 ret = target_configure_device(dev);
1969 if (ret)
1970 return ret;
1971 return count;
1972 }
1973
1974 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1975 {
1976 struct se_device *dev = to_device(item);
1977 struct config_item *lu_ci;
1978 struct t10_alua_lu_gp *lu_gp;
1979 struct t10_alua_lu_gp_member *lu_gp_mem;
1980 ssize_t len = 0;
1981
1982 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1983 if (!lu_gp_mem)
1984 return 0;
1985
1986 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1987 lu_gp = lu_gp_mem->lu_gp;
1988 if (lu_gp) {
1989 lu_ci = &lu_gp->lu_gp_group.cg_item;
1990 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1991 config_item_name(lu_ci), lu_gp->lu_gp_id);
1992 }
1993 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1994
1995 return len;
1996 }
1997
1998 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1999 const char *page, size_t count)
2000 {
2001 struct se_device *dev = to_device(item);
2002 struct se_hba *hba = dev->se_hba;
2003 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2004 struct t10_alua_lu_gp_member *lu_gp_mem;
2005 unsigned char buf[LU_GROUP_NAME_BUF];
2006 int move = 0;
2007
2008 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2009 if (!lu_gp_mem)
2010 return count;
2011
2012 if (count > LU_GROUP_NAME_BUF) {
2013 pr_err("ALUA LU Group Alias too large!\n");
2014 return -EINVAL;
2015 }
2016 memset(buf, 0, LU_GROUP_NAME_BUF);
2017 memcpy(buf, page, count);
2018 /*
2019 * Any ALUA logical unit alias besides "NULL" means we will be
2020 * making a new group association.
2021 */
2022 if (strcmp(strstrip(buf), "NULL")) {
2023 /*
2024 * core_alua_get_lu_gp_by_name() will increment reference to
2025 * struct t10_alua_lu_gp. This reference is released with
2026 * core_alua_get_lu_gp_by_name below().
2027 */
2028 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2029 if (!lu_gp_new)
2030 return -ENODEV;
2031 }
2032
2033 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2034 lu_gp = lu_gp_mem->lu_gp;
2035 if (lu_gp) {
2036 /*
2037 * Clearing an existing lu_gp association, and replacing
2038 * with NULL
2039 */
2040 if (!lu_gp_new) {
2041 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2042 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2043 " %hu\n",
2044 config_item_name(&hba->hba_group.cg_item),
2045 config_item_name(&dev->dev_group.cg_item),
2046 config_item_name(&lu_gp->lu_gp_group.cg_item),
2047 lu_gp->lu_gp_id);
2048
2049 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2050 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2051
2052 return count;
2053 }
2054 /*
2055 * Removing existing association of lu_gp_mem with lu_gp
2056 */
2057 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2058 move = 1;
2059 }
2060 /*
2061 * Associate lu_gp_mem with lu_gp_new.
2062 */
2063 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2064 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2065
2066 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2067 " core/alua/lu_gps/%s, ID: %hu\n",
2068 (move) ? "Moving" : "Adding",
2069 config_item_name(&hba->hba_group.cg_item),
2070 config_item_name(&dev->dev_group.cg_item),
2071 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2072 lu_gp_new->lu_gp_id);
2073
2074 core_alua_put_lu_gp_from_name(lu_gp_new);
2075 return count;
2076 }
2077
2078 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2079 {
2080 struct se_device *dev = to_device(item);
2081 struct t10_alua_lba_map *map;
2082 struct t10_alua_lba_map_member *mem;
2083 char *b = page;
2084 int bl = 0;
2085 char state;
2086
2087 spin_lock(&dev->t10_alua.lba_map_lock);
2088 if (!list_empty(&dev->t10_alua.lba_map_list))
2089 bl += sprintf(b + bl, "%u %u\n",
2090 dev->t10_alua.lba_map_segment_size,
2091 dev->t10_alua.lba_map_segment_multiplier);
2092 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2093 bl += sprintf(b + bl, "%llu %llu",
2094 map->lba_map_first_lba, map->lba_map_last_lba);
2095 list_for_each_entry(mem, &map->lba_map_mem_list,
2096 lba_map_mem_list) {
2097 switch (mem->lba_map_mem_alua_state) {
2098 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2099 state = 'O';
2100 break;
2101 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2102 state = 'A';
2103 break;
2104 case ALUA_ACCESS_STATE_STANDBY:
2105 state = 'S';
2106 break;
2107 case ALUA_ACCESS_STATE_UNAVAILABLE:
2108 state = 'U';
2109 break;
2110 default:
2111 state = '.';
2112 break;
2113 }
2114 bl += sprintf(b + bl, " %d:%c",
2115 mem->lba_map_mem_alua_pg_id, state);
2116 }
2117 bl += sprintf(b + bl, "\n");
2118 }
2119 spin_unlock(&dev->t10_alua.lba_map_lock);
2120 return bl;
2121 }
2122
2123 static ssize_t target_dev_lba_map_store(struct config_item *item,
2124 const char *page, size_t count)
2125 {
2126 struct se_device *dev = to_device(item);
2127 struct t10_alua_lba_map *lba_map = NULL;
2128 struct list_head lba_list;
2129 char *map_entries, *orig, *ptr;
2130 char state;
2131 int pg_num = -1, pg;
2132 int ret = 0, num = 0, pg_id, alua_state;
2133 unsigned long start_lba = -1, end_lba = -1;
2134 unsigned long segment_size = -1, segment_mult = -1;
2135
2136 orig = map_entries = kstrdup(page, GFP_KERNEL);
2137 if (!map_entries)
2138 return -ENOMEM;
2139
2140 INIT_LIST_HEAD(&lba_list);
2141 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2142 if (!*ptr)
2143 continue;
2144
2145 if (num == 0) {
2146 if (sscanf(ptr, "%lu %lu\n",
2147 &segment_size, &segment_mult) != 2) {
2148 pr_err("Invalid line %d\n", num);
2149 ret = -EINVAL;
2150 break;
2151 }
2152 num++;
2153 continue;
2154 }
2155 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2156 pr_err("Invalid line %d\n", num);
2157 ret = -EINVAL;
2158 break;
2159 }
2160 ptr = strchr(ptr, ' ');
2161 if (!ptr) {
2162 pr_err("Invalid line %d, missing end lba\n", num);
2163 ret = -EINVAL;
2164 break;
2165 }
2166 ptr++;
2167 ptr = strchr(ptr, ' ');
2168 if (!ptr) {
2169 pr_err("Invalid line %d, missing state definitions\n",
2170 num);
2171 ret = -EINVAL;
2172 break;
2173 }
2174 ptr++;
2175 lba_map = core_alua_allocate_lba_map(&lba_list,
2176 start_lba, end_lba);
2177 if (IS_ERR(lba_map)) {
2178 ret = PTR_ERR(lba_map);
2179 break;
2180 }
2181 pg = 0;
2182 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2183 switch (state) {
2184 case 'O':
2185 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2186 break;
2187 case 'A':
2188 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2189 break;
2190 case 'S':
2191 alua_state = ALUA_ACCESS_STATE_STANDBY;
2192 break;
2193 case 'U':
2194 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2195 break;
2196 default:
2197 pr_err("Invalid ALUA state '%c'\n", state);
2198 ret = -EINVAL;
2199 goto out;
2200 }
2201
2202 ret = core_alua_allocate_lba_map_mem(lba_map,
2203 pg_id, alua_state);
2204 if (ret) {
2205 pr_err("Invalid target descriptor %d:%c "
2206 "at line %d\n",
2207 pg_id, state, num);
2208 break;
2209 }
2210 pg++;
2211 ptr = strchr(ptr, ' ');
2212 if (ptr)
2213 ptr++;
2214 else
2215 break;
2216 }
2217 if (pg_num == -1)
2218 pg_num = pg;
2219 else if (pg != pg_num) {
2220 pr_err("Only %d from %d port groups definitions "
2221 "at line %d\n", pg, pg_num, num);
2222 ret = -EINVAL;
2223 break;
2224 }
2225 num++;
2226 }
2227 out:
2228 if (ret) {
2229 core_alua_free_lba_map(&lba_list);
2230 count = ret;
2231 } else
2232 core_alua_set_lba_map(dev, &lba_list,
2233 segment_size, segment_mult);
2234 kfree(orig);
2235 return count;
2236 }
2237
2238 CONFIGFS_ATTR_RO(target_dev_, info);
2239 CONFIGFS_ATTR_WO(target_dev_, control);
2240 CONFIGFS_ATTR(target_dev_, alias);
2241 CONFIGFS_ATTR(target_dev_, udev_path);
2242 CONFIGFS_ATTR(target_dev_, enable);
2243 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2244 CONFIGFS_ATTR(target_dev_, lba_map);
2245
2246 static struct configfs_attribute *target_core_dev_attrs[] = {
2247 &target_dev_attr_info,
2248 &target_dev_attr_control,
2249 &target_dev_attr_alias,
2250 &target_dev_attr_udev_path,
2251 &target_dev_attr_enable,
2252 &target_dev_attr_alua_lu_gp,
2253 &target_dev_attr_lba_map,
2254 NULL,
2255 };
2256
2257 static void target_core_dev_release(struct config_item *item)
2258 {
2259 struct config_group *dev_cg = to_config_group(item);
2260 struct se_device *dev =
2261 container_of(dev_cg, struct se_device, dev_group);
2262
2263 target_free_device(dev);
2264 }
2265
2266 /*
2267 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2268 * within target_fabric_port_link()
2269 */
2270 struct configfs_item_operations target_core_dev_item_ops = {
2271 .release = target_core_dev_release,
2272 };
2273
2274 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2275
2276 /* End functions for struct config_item_type tb_dev_cit */
2277
2278 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2279
2280 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2281 {
2282 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2283 lu_gp_group);
2284 }
2285
2286 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2287 {
2288 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2289
2290 if (!lu_gp->lu_gp_valid_id)
2291 return 0;
2292 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2293 }
2294
2295 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2296 const char *page, size_t count)
2297 {
2298 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2299 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2300 unsigned long lu_gp_id;
2301 int ret;
2302
2303 ret = kstrtoul(page, 0, &lu_gp_id);
2304 if (ret < 0) {
2305 pr_err("kstrtoul() returned %d for"
2306 " lu_gp_id\n", ret);
2307 return ret;
2308 }
2309 if (lu_gp_id > 0x0000ffff) {
2310 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2311 " 0x0000ffff\n", lu_gp_id);
2312 return -EINVAL;
2313 }
2314
2315 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2316 if (ret < 0)
2317 return -EINVAL;
2318
2319 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2320 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2321 config_item_name(&alua_lu_gp_cg->cg_item),
2322 lu_gp->lu_gp_id);
2323
2324 return count;
2325 }
2326
2327 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2328 {
2329 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2330 struct se_device *dev;
2331 struct se_hba *hba;
2332 struct t10_alua_lu_gp_member *lu_gp_mem;
2333 ssize_t len = 0, cur_len;
2334 unsigned char buf[LU_GROUP_NAME_BUF];
2335
2336 memset(buf, 0, LU_GROUP_NAME_BUF);
2337
2338 spin_lock(&lu_gp->lu_gp_lock);
2339 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2340 dev = lu_gp_mem->lu_gp_mem_dev;
2341 hba = dev->se_hba;
2342
2343 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2344 config_item_name(&hba->hba_group.cg_item),
2345 config_item_name(&dev->dev_group.cg_item));
2346 cur_len++; /* Extra byte for NULL terminator */
2347
2348 if ((cur_len + len) > PAGE_SIZE) {
2349 pr_warn("Ran out of lu_gp_show_attr"
2350 "_members buffer\n");
2351 break;
2352 }
2353 memcpy(page+len, buf, cur_len);
2354 len += cur_len;
2355 }
2356 spin_unlock(&lu_gp->lu_gp_lock);
2357
2358 return len;
2359 }
2360
2361 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2362 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2363
2364 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2365 &target_lu_gp_attr_lu_gp_id,
2366 &target_lu_gp_attr_members,
2367 NULL,
2368 };
2369
2370 static void target_core_alua_lu_gp_release(struct config_item *item)
2371 {
2372 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2373 struct t10_alua_lu_gp, lu_gp_group);
2374
2375 core_alua_free_lu_gp(lu_gp);
2376 }
2377
2378 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2379 .release = target_core_alua_lu_gp_release,
2380 };
2381
2382 static const struct config_item_type target_core_alua_lu_gp_cit = {
2383 .ct_item_ops = &target_core_alua_lu_gp_ops,
2384 .ct_attrs = target_core_alua_lu_gp_attrs,
2385 .ct_owner = THIS_MODULE,
2386 };
2387
2388 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2389
2390 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2391
2392 static struct config_group *target_core_alua_create_lu_gp(
2393 struct config_group *group,
2394 const char *name)
2395 {
2396 struct t10_alua_lu_gp *lu_gp;
2397 struct config_group *alua_lu_gp_cg = NULL;
2398 struct config_item *alua_lu_gp_ci = NULL;
2399
2400 lu_gp = core_alua_allocate_lu_gp(name, 0);
2401 if (IS_ERR(lu_gp))
2402 return NULL;
2403
2404 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2405 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2406
2407 config_group_init_type_name(alua_lu_gp_cg, name,
2408 &target_core_alua_lu_gp_cit);
2409
2410 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2411 " Group: core/alua/lu_gps/%s\n",
2412 config_item_name(alua_lu_gp_ci));
2413
2414 return alua_lu_gp_cg;
2415
2416 }
2417
2418 static void target_core_alua_drop_lu_gp(
2419 struct config_group *group,
2420 struct config_item *item)
2421 {
2422 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2423 struct t10_alua_lu_gp, lu_gp_group);
2424
2425 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2426 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2427 config_item_name(item), lu_gp->lu_gp_id);
2428 /*
2429 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2430 * -> target_core_alua_lu_gp_release()
2431 */
2432 config_item_put(item);
2433 }
2434
2435 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2436 .make_group = &target_core_alua_create_lu_gp,
2437 .drop_item = &target_core_alua_drop_lu_gp,
2438 };
2439
2440 static const struct config_item_type target_core_alua_lu_gps_cit = {
2441 .ct_item_ops = NULL,
2442 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2443 .ct_owner = THIS_MODULE,
2444 };
2445
2446 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2447
2448 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2449
2450 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2451 {
2452 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2453 tg_pt_gp_group);
2454 }
2455
2456 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2457 char *page)
2458 {
2459 return sprintf(page, "%d\n",
2460 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2461 }
2462
2463 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2464 const char *page, size_t count)
2465 {
2466 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2467 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2468 unsigned long tmp;
2469 int new_state, ret;
2470
2471 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2472 pr_err("Unable to do implicit ALUA on non valid"
2473 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2474 return -EINVAL;
2475 }
2476 if (!target_dev_configured(dev)) {
2477 pr_err("Unable to set alua_access_state while device is"
2478 " not configured\n");
2479 return -ENODEV;
2480 }
2481
2482 ret = kstrtoul(page, 0, &tmp);
2483 if (ret < 0) {
2484 pr_err("Unable to extract new ALUA access state from"
2485 " %s\n", page);
2486 return ret;
2487 }
2488 new_state = (int)tmp;
2489
2490 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2491 pr_err("Unable to process implicit configfs ALUA"
2492 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2493 return -EINVAL;
2494 }
2495 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2496 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2497 /* LBA DEPENDENT is only allowed with implicit ALUA */
2498 pr_err("Unable to process implicit configfs ALUA transition"
2499 " while explicit ALUA management is enabled\n");
2500 return -EINVAL;
2501 }
2502
2503 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2504 NULL, NULL, new_state, 0);
2505 return (!ret) ? count : -EINVAL;
2506 }
2507
2508 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2509 char *page)
2510 {
2511 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2512 return sprintf(page, "%s\n",
2513 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2514 }
2515
2516 static ssize_t target_tg_pt_gp_alua_access_status_store(
2517 struct config_item *item, const char *page, size_t count)
2518 {
2519 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2520 unsigned long tmp;
2521 int new_status, ret;
2522
2523 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2524 pr_err("Unable to do set ALUA access status on non"
2525 " valid tg_pt_gp ID: %hu\n",
2526 tg_pt_gp->tg_pt_gp_valid_id);
2527 return -EINVAL;
2528 }
2529
2530 ret = kstrtoul(page, 0, &tmp);
2531 if (ret < 0) {
2532 pr_err("Unable to extract new ALUA access status"
2533 " from %s\n", page);
2534 return ret;
2535 }
2536 new_status = (int)tmp;
2537
2538 if ((new_status != ALUA_STATUS_NONE) &&
2539 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2540 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2541 pr_err("Illegal ALUA access status: 0x%02x\n",
2542 new_status);
2543 return -EINVAL;
2544 }
2545
2546 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2547 return count;
2548 }
2549
2550 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2551 char *page)
2552 {
2553 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2554 }
2555
2556 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2557 const char *page, size_t count)
2558 {
2559 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2560 }
2561
2562 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2563 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2564 struct config_item *item, char *p) \
2565 { \
2566 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2567 return sprintf(p, "%d\n", \
2568 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2569 } \
2570 \
2571 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2572 struct config_item *item, const char *p, size_t c) \
2573 { \
2574 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2575 unsigned long tmp; \
2576 int ret; \
2577 \
2578 if (!t->tg_pt_gp_valid_id) { \
2579 pr_err("Unable to do set " #_name " ALUA state on non" \
2580 " valid tg_pt_gp ID: %hu\n", \
2581 t->tg_pt_gp_valid_id); \
2582 return -EINVAL; \
2583 } \
2584 \
2585 ret = kstrtoul(p, 0, &tmp); \
2586 if (ret < 0) { \
2587 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2588 return -EINVAL; \
2589 } \
2590 if (tmp > 1) { \
2591 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2592 return -EINVAL; \
2593 } \
2594 if (tmp) \
2595 t->tg_pt_gp_alua_supported_states |= _bit; \
2596 else \
2597 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2598 \
2599 return c; \
2600 }
2601
2602 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2603 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2604 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2605 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2606 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2607 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2608 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2609
2610 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2611 struct config_item *item, char *page)
2612 {
2613 return sprintf(page, "%d\n",
2614 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2615 }
2616
2617 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2618 struct config_item *item, const char *page, size_t count)
2619 {
2620 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2621 unsigned long tmp;
2622 int ret;
2623
2624 ret = kstrtoul(page, 0, &tmp);
2625 if (ret < 0) {
2626 pr_err("Unable to extract alua_write_metadata\n");
2627 return ret;
2628 }
2629
2630 if ((tmp != 0) && (tmp != 1)) {
2631 pr_err("Illegal value for alua_write_metadata:"
2632 " %lu\n", tmp);
2633 return -EINVAL;
2634 }
2635 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2636
2637 return count;
2638 }
2639
2640 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2641 char *page)
2642 {
2643 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2644 }
2645
2646 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2647 const char *page, size_t count)
2648 {
2649 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2650 count);
2651 }
2652
2653 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2654 char *page)
2655 {
2656 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2657 }
2658
2659 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2660 const char *page, size_t count)
2661 {
2662 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2663 count);
2664 }
2665
2666 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2667 struct config_item *item, char *page)
2668 {
2669 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2670 }
2671
2672 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2673 struct config_item *item, const char *page, size_t count)
2674 {
2675 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2676 count);
2677 }
2678
2679 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2680 char *page)
2681 {
2682 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2683 }
2684
2685 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2686 const char *page, size_t count)
2687 {
2688 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2689 }
2690
2691 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2692 char *page)
2693 {
2694 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2695
2696 if (!tg_pt_gp->tg_pt_gp_valid_id)
2697 return 0;
2698 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2699 }
2700
2701 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2702 const char *page, size_t count)
2703 {
2704 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2705 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2706 unsigned long tg_pt_gp_id;
2707 int ret;
2708
2709 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2710 if (ret < 0) {
2711 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2712 page);
2713 return ret;
2714 }
2715 if (tg_pt_gp_id > 0x0000ffff) {
2716 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2717 tg_pt_gp_id);
2718 return -EINVAL;
2719 }
2720
2721 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2722 if (ret < 0)
2723 return -EINVAL;
2724
2725 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2726 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2727 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2728 tg_pt_gp->tg_pt_gp_id);
2729
2730 return count;
2731 }
2732
2733 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2734 char *page)
2735 {
2736 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2737 struct se_lun *lun;
2738 ssize_t len = 0, cur_len;
2739 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2740
2741 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2742
2743 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2744 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2745 lun_tg_pt_gp_link) {
2746 struct se_portal_group *tpg = lun->lun_tpg;
2747
2748 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2749 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2750 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2751 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2752 config_item_name(&lun->lun_group.cg_item));
2753 cur_len++; /* Extra byte for NULL terminator */
2754
2755 if ((cur_len + len) > PAGE_SIZE) {
2756 pr_warn("Ran out of lu_gp_show_attr"
2757 "_members buffer\n");
2758 break;
2759 }
2760 memcpy(page+len, buf, cur_len);
2761 len += cur_len;
2762 }
2763 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2764
2765 return len;
2766 }
2767
2768 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2769 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2770 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2771 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2772 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2773 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2774 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2775 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2776 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2777 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2778 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2779 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2780 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2781 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2782 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2783 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2784 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2785
2786 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2787 &target_tg_pt_gp_attr_alua_access_state,
2788 &target_tg_pt_gp_attr_alua_access_status,
2789 &target_tg_pt_gp_attr_alua_access_type,
2790 &target_tg_pt_gp_attr_alua_support_transitioning,
2791 &target_tg_pt_gp_attr_alua_support_offline,
2792 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2793 &target_tg_pt_gp_attr_alua_support_unavailable,
2794 &target_tg_pt_gp_attr_alua_support_standby,
2795 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2796 &target_tg_pt_gp_attr_alua_support_active_optimized,
2797 &target_tg_pt_gp_attr_alua_write_metadata,
2798 &target_tg_pt_gp_attr_nonop_delay_msecs,
2799 &target_tg_pt_gp_attr_trans_delay_msecs,
2800 &target_tg_pt_gp_attr_implicit_trans_secs,
2801 &target_tg_pt_gp_attr_preferred,
2802 &target_tg_pt_gp_attr_tg_pt_gp_id,
2803 &target_tg_pt_gp_attr_members,
2804 NULL,
2805 };
2806
2807 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2808 {
2809 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2810 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2811
2812 core_alua_free_tg_pt_gp(tg_pt_gp);
2813 }
2814
2815 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2816 .release = target_core_alua_tg_pt_gp_release,
2817 };
2818
2819 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
2820 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2821 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2822 .ct_owner = THIS_MODULE,
2823 };
2824
2825 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2826
2827 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2828
2829 static struct config_group *target_core_alua_create_tg_pt_gp(
2830 struct config_group *group,
2831 const char *name)
2832 {
2833 struct t10_alua *alua = container_of(group, struct t10_alua,
2834 alua_tg_pt_gps_group);
2835 struct t10_alua_tg_pt_gp *tg_pt_gp;
2836 struct config_group *alua_tg_pt_gp_cg = NULL;
2837 struct config_item *alua_tg_pt_gp_ci = NULL;
2838
2839 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2840 if (!tg_pt_gp)
2841 return NULL;
2842
2843 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2844 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2845
2846 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2847 &target_core_alua_tg_pt_gp_cit);
2848
2849 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2850 " Group: alua/tg_pt_gps/%s\n",
2851 config_item_name(alua_tg_pt_gp_ci));
2852
2853 return alua_tg_pt_gp_cg;
2854 }
2855
2856 static void target_core_alua_drop_tg_pt_gp(
2857 struct config_group *group,
2858 struct config_item *item)
2859 {
2860 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2861 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2862
2863 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2864 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2865 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2866 /*
2867 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2868 * -> target_core_alua_tg_pt_gp_release().
2869 */
2870 config_item_put(item);
2871 }
2872
2873 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2874 .make_group = &target_core_alua_create_tg_pt_gp,
2875 .drop_item = &target_core_alua_drop_tg_pt_gp,
2876 };
2877
2878 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2879
2880 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2881
2882 /* Start functions for struct config_item_type target_core_alua_cit */
2883
2884 /*
2885 * target_core_alua_cit is a ConfigFS group that lives under
2886 * /sys/kernel/config/target/core/alua. There are default groups
2887 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2888 * target_core_alua_cit in target_core_init_configfs() below.
2889 */
2890 static const struct config_item_type target_core_alua_cit = {
2891 .ct_item_ops = NULL,
2892 .ct_attrs = NULL,
2893 .ct_owner = THIS_MODULE,
2894 };
2895
2896 /* End functions for struct config_item_type target_core_alua_cit */
2897
2898 /* Start functions for struct config_item_type tb_dev_stat_cit */
2899
2900 static struct config_group *target_core_stat_mkdir(
2901 struct config_group *group,
2902 const char *name)
2903 {
2904 return ERR_PTR(-ENOSYS);
2905 }
2906
2907 static void target_core_stat_rmdir(
2908 struct config_group *group,
2909 struct config_item *item)
2910 {
2911 return;
2912 }
2913
2914 static struct configfs_group_operations target_core_stat_group_ops = {
2915 .make_group = &target_core_stat_mkdir,
2916 .drop_item = &target_core_stat_rmdir,
2917 };
2918
2919 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2920
2921 /* End functions for struct config_item_type tb_dev_stat_cit */
2922
2923 /* Start functions for struct config_item_type target_core_hba_cit */
2924
2925 static struct config_group *target_core_make_subdev(
2926 struct config_group *group,
2927 const char *name)
2928 {
2929 struct t10_alua_tg_pt_gp *tg_pt_gp;
2930 struct config_item *hba_ci = &group->cg_item;
2931 struct se_hba *hba = item_to_hba(hba_ci);
2932 struct target_backend *tb = hba->backend;
2933 struct se_device *dev;
2934 int errno = -ENOMEM, ret;
2935
2936 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2937 if (ret)
2938 return ERR_PTR(ret);
2939
2940 dev = target_alloc_device(hba, name);
2941 if (!dev)
2942 goto out_unlock;
2943
2944 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2945
2946 config_group_init_type_name(&dev->dev_action_group, "action",
2947 &tb->tb_dev_action_cit);
2948 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
2949
2950 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2951 &tb->tb_dev_attrib_cit);
2952 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2953
2954 config_group_init_type_name(&dev->dev_pr_group, "pr",
2955 &tb->tb_dev_pr_cit);
2956 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2957
2958 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2959 &tb->tb_dev_wwn_cit);
2960 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2961 &dev->dev_group);
2962
2963 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2964 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2965 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2966 &dev->dev_group);
2967
2968 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2969 "statistics", &tb->tb_dev_stat_cit);
2970 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2971 &dev->dev_group);
2972
2973 /*
2974 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2975 */
2976 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2977 if (!tg_pt_gp)
2978 goto out_free_device;
2979 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2980
2981 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2982 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2983 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2984 &dev->t10_alua.alua_tg_pt_gps_group);
2985
2986 /*
2987 * Add core/$HBA/$DEV/statistics/ default groups
2988 */
2989 target_stat_setup_dev_default_groups(dev);
2990
2991 mutex_unlock(&hba->hba_access_mutex);
2992 return &dev->dev_group;
2993
2994 out_free_device:
2995 target_free_device(dev);
2996 out_unlock:
2997 mutex_unlock(&hba->hba_access_mutex);
2998 return ERR_PTR(errno);
2999 }
3000
3001 static void target_core_drop_subdev(
3002 struct config_group *group,
3003 struct config_item *item)
3004 {
3005 struct config_group *dev_cg = to_config_group(item);
3006 struct se_device *dev =
3007 container_of(dev_cg, struct se_device, dev_group);
3008 struct se_hba *hba;
3009
3010 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3011
3012 mutex_lock(&hba->hba_access_mutex);
3013
3014 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3015 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3016
3017 /*
3018 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3019 * directly from target_core_alua_tg_pt_gp_release().
3020 */
3021 dev->t10_alua.default_tg_pt_gp = NULL;
3022
3023 configfs_remove_default_groups(dev_cg);
3024
3025 /*
3026 * se_dev is released from target_core_dev_item_ops->release()
3027 */
3028 config_item_put(item);
3029 mutex_unlock(&hba->hba_access_mutex);
3030 }
3031
3032 static struct configfs_group_operations target_core_hba_group_ops = {
3033 .make_group = target_core_make_subdev,
3034 .drop_item = target_core_drop_subdev,
3035 };
3036
3037
3038 static inline struct se_hba *to_hba(struct config_item *item)
3039 {
3040 return container_of(to_config_group(item), struct se_hba, hba_group);
3041 }
3042
3043 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3044 {
3045 struct se_hba *hba = to_hba(item);
3046
3047 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3048 hba->hba_id, hba->backend->ops->name,
3049 TARGET_CORE_VERSION);
3050 }
3051
3052 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3053 {
3054 struct se_hba *hba = to_hba(item);
3055 int hba_mode = 0;
3056
3057 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3058 hba_mode = 1;
3059
3060 return sprintf(page, "%d\n", hba_mode);
3061 }
3062
3063 static ssize_t target_hba_mode_store(struct config_item *item,
3064 const char *page, size_t count)
3065 {
3066 struct se_hba *hba = to_hba(item);
3067 unsigned long mode_flag;
3068 int ret;
3069
3070 if (hba->backend->ops->pmode_enable_hba == NULL)
3071 return -EINVAL;
3072
3073 ret = kstrtoul(page, 0, &mode_flag);
3074 if (ret < 0) {
3075 pr_err("Unable to extract hba mode flag: %d\n", ret);
3076 return ret;
3077 }
3078
3079 if (hba->dev_count) {
3080 pr_err("Unable to set hba_mode with active devices\n");
3081 return -EINVAL;
3082 }
3083
3084 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3085 if (ret < 0)
3086 return -EINVAL;
3087 if (ret > 0)
3088 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3089 else if (ret == 0)
3090 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3091
3092 return count;
3093 }
3094
3095 CONFIGFS_ATTR_RO(target_, hba_info);
3096 CONFIGFS_ATTR(target_, hba_mode);
3097
3098 static void target_core_hba_release(struct config_item *item)
3099 {
3100 struct se_hba *hba = container_of(to_config_group(item),
3101 struct se_hba, hba_group);
3102 core_delete_hba(hba);
3103 }
3104
3105 static struct configfs_attribute *target_core_hba_attrs[] = {
3106 &target_attr_hba_info,
3107 &target_attr_hba_mode,
3108 NULL,
3109 };
3110
3111 static struct configfs_item_operations target_core_hba_item_ops = {
3112 .release = target_core_hba_release,
3113 };
3114
3115 static const struct config_item_type target_core_hba_cit = {
3116 .ct_item_ops = &target_core_hba_item_ops,
3117 .ct_group_ops = &target_core_hba_group_ops,
3118 .ct_attrs = target_core_hba_attrs,
3119 .ct_owner = THIS_MODULE,
3120 };
3121
3122 static struct config_group *target_core_call_addhbatotarget(
3123 struct config_group *group,
3124 const char *name)
3125 {
3126 char *se_plugin_str, *str, *str2;
3127 struct se_hba *hba;
3128 char buf[TARGET_CORE_NAME_MAX_LEN];
3129 unsigned long plugin_dep_id = 0;
3130 int ret;
3131
3132 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3133 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3134 pr_err("Passed *name strlen(): %d exceeds"
3135 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3136 TARGET_CORE_NAME_MAX_LEN);
3137 return ERR_PTR(-ENAMETOOLONG);
3138 }
3139 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3140
3141 str = strstr(buf, "_");
3142 if (!str) {
3143 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3144 return ERR_PTR(-EINVAL);
3145 }
3146 se_plugin_str = buf;
3147 /*
3148 * Special case for subsystem plugins that have "_" in their names.
3149 * Namely rd_direct and rd_mcp..
3150 */
3151 str2 = strstr(str+1, "_");
3152 if (str2) {
3153 *str2 = '\0'; /* Terminate for *se_plugin_str */
3154 str2++; /* Skip to start of plugin dependent ID */
3155 str = str2;
3156 } else {
3157 *str = '\0'; /* Terminate for *se_plugin_str */
3158 str++; /* Skip to start of plugin dependent ID */
3159 }
3160
3161 ret = kstrtoul(str, 0, &plugin_dep_id);
3162 if (ret < 0) {
3163 pr_err("kstrtoul() returned %d for"
3164 " plugin_dep_id\n", ret);
3165 return ERR_PTR(ret);
3166 }
3167 /*
3168 * Load up TCM subsystem plugins if they have not already been loaded.
3169 */
3170 transport_subsystem_check_init();
3171
3172 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3173 if (IS_ERR(hba))
3174 return ERR_CAST(hba);
3175
3176 config_group_init_type_name(&hba->hba_group, name,
3177 &target_core_hba_cit);
3178
3179 return &hba->hba_group;
3180 }
3181
3182 static void target_core_call_delhbafromtarget(
3183 struct config_group *group,
3184 struct config_item *item)
3185 {
3186 /*
3187 * core_delete_hba() is called from target_core_hba_item_ops->release()
3188 * -> target_core_hba_release()
3189 */
3190 config_item_put(item);
3191 }
3192
3193 static struct configfs_group_operations target_core_group_ops = {
3194 .make_group = target_core_call_addhbatotarget,
3195 .drop_item = target_core_call_delhbafromtarget,
3196 };
3197
3198 static const struct config_item_type target_core_cit = {
3199 .ct_item_ops = NULL,
3200 .ct_group_ops = &target_core_group_ops,
3201 .ct_attrs = NULL,
3202 .ct_owner = THIS_MODULE,
3203 };
3204
3205 /* Stop functions for struct config_item_type target_core_hba_cit */
3206
3207 void target_setup_backend_cits(struct target_backend *tb)
3208 {
3209 target_core_setup_dev_cit(tb);
3210 target_core_setup_dev_action_cit(tb);
3211 target_core_setup_dev_attrib_cit(tb);
3212 target_core_setup_dev_pr_cit(tb);
3213 target_core_setup_dev_wwn_cit(tb);
3214 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3215 target_core_setup_dev_stat_cit(tb);
3216 }
3217
3218 static void target_init_dbroot(void)
3219 {
3220 struct file *fp;
3221
3222 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3223 fp = filp_open(db_root_stage, O_RDONLY, 0);
3224 if (IS_ERR(fp)) {
3225 pr_err("db_root: cannot open: %s\n", db_root_stage);
3226 return;
3227 }
3228 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3229 filp_close(fp, NULL);
3230 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3231 return;
3232 }
3233 filp_close(fp, NULL);
3234
3235 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3236 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3237 }
3238
3239 static int __init target_core_init_configfs(void)
3240 {
3241 struct configfs_subsystem *subsys = &target_core_fabrics;
3242 struct t10_alua_lu_gp *lu_gp;
3243 int ret;
3244
3245 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3246 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3247 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3248
3249 config_group_init(&subsys->su_group);
3250 mutex_init(&subsys->su_mutex);
3251
3252 ret = init_se_kmem_caches();
3253 if (ret < 0)
3254 return ret;
3255 /*
3256 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3257 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3258 */
3259 config_group_init_type_name(&target_core_hbagroup, "core",
3260 &target_core_cit);
3261 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3262
3263 /*
3264 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3265 */
3266 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3267 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3268
3269 /*
3270 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3271 * groups under /sys/kernel/config/target/core/alua/
3272 */
3273 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3274 &target_core_alua_lu_gps_cit);
3275 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3276
3277 /*
3278 * Add core/alua/lu_gps/default_lu_gp
3279 */
3280 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3281 if (IS_ERR(lu_gp)) {
3282 ret = -ENOMEM;
3283 goto out_global;
3284 }
3285
3286 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3287 &target_core_alua_lu_gp_cit);
3288 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3289
3290 default_lu_gp = lu_gp;
3291
3292 /*
3293 * Register the target_core_mod subsystem with configfs.
3294 */
3295 ret = configfs_register_subsystem(subsys);
3296 if (ret < 0) {
3297 pr_err("Error %d while registering subsystem %s\n",
3298 ret, subsys->su_group.cg_item.ci_namebuf);
3299 goto out_global;
3300 }
3301 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3302 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3303 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3304 /*
3305 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3306 */
3307 ret = rd_module_init();
3308 if (ret < 0)
3309 goto out;
3310
3311 ret = core_dev_setup_virtual_lun0();
3312 if (ret < 0)
3313 goto out;
3314
3315 ret = target_xcopy_setup_pt();
3316 if (ret < 0)
3317 goto out;
3318
3319 target_init_dbroot();
3320
3321 return 0;
3322
3323 out:
3324 configfs_unregister_subsystem(subsys);
3325 core_dev_release_virtual_lun0();
3326 rd_module_exit();
3327 out_global:
3328 if (default_lu_gp) {
3329 core_alua_free_lu_gp(default_lu_gp);
3330 default_lu_gp = NULL;
3331 }
3332 release_se_kmem_caches();
3333 return ret;
3334 }
3335
3336 static void __exit target_core_exit_configfs(void)
3337 {
3338 configfs_remove_default_groups(&alua_lu_gps_group);
3339 configfs_remove_default_groups(&alua_group);
3340 configfs_remove_default_groups(&target_core_hbagroup);
3341
3342 /*
3343 * We expect subsys->su_group.default_groups to be released
3344 * by configfs subsystem provider logic..
3345 */
3346 configfs_unregister_subsystem(&target_core_fabrics);
3347
3348 core_alua_free_lu_gp(default_lu_gp);
3349 default_lu_gp = NULL;
3350
3351 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3352 " Infrastructure\n");
3353
3354 core_dev_release_virtual_lun0();
3355 rd_module_exit();
3356 target_xcopy_release_pt();
3357 release_se_kmem_caches();
3358 }
3359
3360 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3361 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3362 MODULE_LICENSE("GPL");
3363
3364 module_init(target_core_init_configfs);
3365 module_exit(target_core_exit_configfs);
Linux with added FPC-III support