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Merge 5.0-rc6 into driver-core-next
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blob8e7fffbb880291e494dc8074e1fbdaa884426fea
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 const char *cmp_name = tf->tf_ops->fabric_alias;
176 if (!cmp_name)
177 cmp_name = tf->tf_ops->fabric_name;
178 if (!strcmp(cmp_name, name)) {
179 atomic_inc(&tf->tf_access_cnt);
180 mutex_unlock(&g_tf_lock);
181 return tf;
182 }
183 }
184 mutex_unlock(&g_tf_lock);
185
186 return NULL;
187 }
188
189 /*
190 * Called from struct target_core_group_ops->make_group()
191 */
192 static struct config_group *target_core_register_fabric(
193 struct config_group *group,
194 const char *name)
195 {
196 struct target_fabric_configfs *tf;
197 int ret;
198
199 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
200 " %s\n", group, name);
201
202 tf = target_core_get_fabric(name);
203 if (!tf) {
204 pr_debug("target_core_register_fabric() trying autoload for %s\n",
205 name);
206
207 /*
208 * Below are some hardcoded request_module() calls to automatically
209 * local fabric modules when the following is called:
210 *
211 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
212 *
213 * Note that this does not limit which TCM fabric module can be
214 * registered, but simply provids auto loading logic for modules with
215 * mkdir(2) system calls with known TCM fabric modules.
216 */
217
218 if (!strncmp(name, "iscsi", 5)) {
219 /*
220 * Automatically load the LIO Target fabric module when the
221 * following is called:
222 *
223 * mkdir -p $CONFIGFS/target/iscsi
224 */
225 ret = request_module("iscsi_target_mod");
226 if (ret < 0) {
227 pr_debug("request_module() failed for"
228 " iscsi_target_mod.ko: %d\n", ret);
229 return ERR_PTR(-EINVAL);
230 }
231 } else if (!strncmp(name, "loopback", 8)) {
232 /*
233 * Automatically load the tcm_loop fabric module when the
234 * following is called:
235 *
236 * mkdir -p $CONFIGFS/target/loopback
237 */
238 ret = request_module("tcm_loop");
239 if (ret < 0) {
240 pr_debug("request_module() failed for"
241 " tcm_loop.ko: %d\n", ret);
242 return ERR_PTR(-EINVAL);
243 }
244 }
245
246 tf = target_core_get_fabric(name);
247 }
248
249 if (!tf) {
250 pr_debug("target_core_get_fabric() failed for %s\n",
251 name);
252 return ERR_PTR(-EINVAL);
253 }
254 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
255 " %s\n", tf->tf_ops->fabric_name);
256 /*
257 * On a successful target_core_get_fabric() look, the returned
258 * struct target_fabric_configfs *tf will contain a usage reference.
259 */
260 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
261 &tf->tf_wwn_cit);
262
263 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
264
265 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
266 &tf->tf_discovery_cit);
267 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
268
269 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
270 config_item_name(&tf->tf_group.cg_item));
271 return &tf->tf_group;
272 }
273
274 /*
275 * Called from struct target_core_group_ops->drop_item()
276 */
277 static void target_core_deregister_fabric(
278 struct config_group *group,
279 struct config_item *item)
280 {
281 struct target_fabric_configfs *tf = container_of(
282 to_config_group(item), struct target_fabric_configfs, tf_group);
283
284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
285 " tf list\n", config_item_name(item));
286
287 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
288 " %s\n", tf->tf_ops->fabric_name);
289 atomic_dec(&tf->tf_access_cnt);
290
291 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
292 " %s\n", config_item_name(item));
293
294 configfs_remove_default_groups(&tf->tf_group);
295 config_item_put(item);
296 }
297
298 static struct configfs_group_operations target_core_fabric_group_ops = {
299 .make_group = &target_core_register_fabric,
300 .drop_item = &target_core_deregister_fabric,
301 };
302
303 /*
304 * All item attributes appearing in /sys/kernel/target/ appear here.
305 */
306 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
307 &target_core_item_attr_version,
308 &target_core_item_attr_dbroot,
309 NULL,
310 };
311
312 /*
313 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
314 */
315 static const struct config_item_type target_core_fabrics_item = {
316 .ct_group_ops = &target_core_fabric_group_ops,
317 .ct_attrs = target_core_fabric_item_attrs,
318 .ct_owner = THIS_MODULE,
319 };
320
321 static struct configfs_subsystem target_core_fabrics = {
322 .su_group = {
323 .cg_item = {
324 .ci_namebuf = "target",
325 .ci_type = &target_core_fabrics_item,
326 },
327 },
328 };
329
330 int target_depend_item(struct config_item *item)
331 {
332 return configfs_depend_item(&target_core_fabrics, item);
333 }
334 EXPORT_SYMBOL(target_depend_item);
335
336 void target_undepend_item(struct config_item *item)
337 {
338 return configfs_undepend_item(item);
339 }
340 EXPORT_SYMBOL(target_undepend_item);
341
342 /*##############################################################################
343 // Start functions called by external Target Fabrics Modules
344 //############################################################################*/
345
346 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
347 {
348 if (tfo->fabric_alias) {
349 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
350 pr_err("Passed alias: %s exceeds "
351 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
352 return -EINVAL;
353 }
354 }
355 if (!tfo->fabric_name) {
356 pr_err("Missing tfo->fabric_name\n");
357 return -EINVAL;
358 }
359 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
360 pr_err("Passed name: %s exceeds "
361 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
362 return -EINVAL;
363 }
364 if (!tfo->tpg_get_wwn) {
365 pr_err("Missing tfo->tpg_get_wwn()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_get_tag) {
369 pr_err("Missing tfo->tpg_get_tag()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_check_demo_mode) {
373 pr_err("Missing tfo->tpg_check_demo_mode()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_check_demo_mode_cache) {
377 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_check_demo_mode_write_protect) {
381 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_check_prod_mode_write_protect) {
385 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
386 return -EINVAL;
387 }
388 if (!tfo->tpg_get_inst_index) {
389 pr_err("Missing tfo->tpg_get_inst_index()\n");
390 return -EINVAL;
391 }
392 if (!tfo->release_cmd) {
393 pr_err("Missing tfo->release_cmd()\n");
394 return -EINVAL;
395 }
396 if (!tfo->sess_get_index) {
397 pr_err("Missing tfo->sess_get_index()\n");
398 return -EINVAL;
399 }
400 if (!tfo->write_pending) {
401 pr_err("Missing tfo->write_pending()\n");
402 return -EINVAL;
403 }
404 if (!tfo->write_pending_status) {
405 pr_err("Missing tfo->write_pending_status()\n");
406 return -EINVAL;
407 }
408 if (!tfo->set_default_node_attributes) {
409 pr_err("Missing tfo->set_default_node_attributes()\n");
410 return -EINVAL;
411 }
412 if (!tfo->get_cmd_state) {
413 pr_err("Missing tfo->get_cmd_state()\n");
414 return -EINVAL;
415 }
416 if (!tfo->queue_data_in) {
417 pr_err("Missing tfo->queue_data_in()\n");
418 return -EINVAL;
419 }
420 if (!tfo->queue_status) {
421 pr_err("Missing tfo->queue_status()\n");
422 return -EINVAL;
423 }
424 if (!tfo->queue_tm_rsp) {
425 pr_err("Missing tfo->queue_tm_rsp()\n");
426 return -EINVAL;
427 }
428 if (!tfo->aborted_task) {
429 pr_err("Missing tfo->aborted_task()\n");
430 return -EINVAL;
431 }
432 if (!tfo->check_stop_free) {
433 pr_err("Missing tfo->check_stop_free()\n");
434 return -EINVAL;
435 }
436 /*
437 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
438 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
439 * target_core_fabric_configfs.c WWN+TPG group context code.
440 */
441 if (!tfo->fabric_make_wwn) {
442 pr_err("Missing tfo->fabric_make_wwn()\n");
443 return -EINVAL;
444 }
445 if (!tfo->fabric_drop_wwn) {
446 pr_err("Missing tfo->fabric_drop_wwn()\n");
447 return -EINVAL;
448 }
449 if (!tfo->fabric_make_tpg) {
450 pr_err("Missing tfo->fabric_make_tpg()\n");
451 return -EINVAL;
452 }
453 if (!tfo->fabric_drop_tpg) {
454 pr_err("Missing tfo->fabric_drop_tpg()\n");
455 return -EINVAL;
456 }
457
458 return 0;
459 }
460
461 int target_register_template(const struct target_core_fabric_ops *fo)
462 {
463 struct target_fabric_configfs *tf;
464 int ret;
465
466 ret = target_fabric_tf_ops_check(fo);
467 if (ret)
468 return ret;
469
470 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
471 if (!tf) {
472 pr_err("%s: could not allocate memory!\n", __func__);
473 return -ENOMEM;
474 }
475
476 INIT_LIST_HEAD(&tf->tf_list);
477 atomic_set(&tf->tf_access_cnt, 0);
478 tf->tf_ops = fo;
479 target_fabric_setup_cits(tf);
480
481 mutex_lock(&g_tf_lock);
482 list_add_tail(&tf->tf_list, &g_tf_list);
483 mutex_unlock(&g_tf_lock);
484
485 return 0;
486 }
487 EXPORT_SYMBOL(target_register_template);
488
489 void target_unregister_template(const struct target_core_fabric_ops *fo)
490 {
491 struct target_fabric_configfs *t;
492
493 mutex_lock(&g_tf_lock);
494 list_for_each_entry(t, &g_tf_list, tf_list) {
495 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
496 BUG_ON(atomic_read(&t->tf_access_cnt));
497 list_del(&t->tf_list);
498 mutex_unlock(&g_tf_lock);
499 /*
500 * Wait for any outstanding fabric se_deve_entry->rcu_head
501 * callbacks to complete post kfree_rcu(), before allowing
502 * fabric driver unload of TFO->module to proceed.
503 */
504 rcu_barrier();
505 kfree(t);
506 return;
507 }
508 }
509 mutex_unlock(&g_tf_lock);
510 }
511 EXPORT_SYMBOL(target_unregister_template);
512
513 /*##############################################################################
514 // Stop functions called by external Target Fabrics Modules
515 //############################################################################*/
516
517 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
518 {
519 return container_of(to_config_group(item), struct se_dev_attrib,
520 da_group);
521 }
522
523 /* Start functions for struct config_item_type tb_dev_attrib_cit */
524 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
525 static ssize_t _name##_show(struct config_item *item, char *page) \
526 { \
527 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
528 }
529
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
533 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
537 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
538 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
539 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
540 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
541 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
542 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
543 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
544 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
545 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
546 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
547 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
548 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
549 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
550 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
551 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
552 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
553 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
554 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
555 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
556 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
557 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
558 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
559 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
560 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
561
562 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
563 static ssize_t _name##_store(struct config_item *item, const char *page,\
564 size_t count) \
565 { \
566 struct se_dev_attrib *da = to_attrib(item); \
567 u32 val; \
568 int ret; \
569 \
570 ret = kstrtou32(page, 0, &val); \
571 if (ret < 0) \
572 return ret; \
573 da->_name = val; \
574 return count; \
575 }
576
577 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
578 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
579 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
580 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
581 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
582
583 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
584 static ssize_t _name##_store(struct config_item *item, const char *page, \
585 size_t count) \
586 { \
587 struct se_dev_attrib *da = to_attrib(item); \
588 bool flag; \
589 int ret; \
590 \
591 ret = strtobool(page, &flag); \
592 if (ret < 0) \
593 return ret; \
594 da->_name = flag; \
595 return count; \
596 }
597
598 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
599 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
600 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
601 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
602 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
603 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
604
605 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
606 static ssize_t _name##_store(struct config_item *item, const char *page,\
607 size_t count) \
608 { \
609 printk_once(KERN_WARNING \
610 "ignoring deprecated %s attribute\n", \
611 __stringify(_name)); \
612 return count; \
613 }
614
615 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
616 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
617
618 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
619 {
620 const char *configname;
621
622 configname = config_item_name(&dev->dev_group.cg_item);
623 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
624 pr_warn("dev[%p]: Backstore name '%s' is too long for "
625 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
626 configname);
627 }
628 /*
629 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
630 * here without potentially breaking existing setups, so continue to
631 * truncate one byte shorter than what can be carried in INQUIRY.
632 */
633 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
634 }
635
636 static ssize_t emulate_model_alias_store(struct config_item *item,
637 const char *page, size_t count)
638 {
639 struct se_dev_attrib *da = to_attrib(item);
640 struct se_device *dev = da->da_dev;
641 bool flag;
642 int ret;
643
644 if (dev->export_count) {
645 pr_err("dev[%p]: Unable to change model alias"
646 " while export_count is %d\n",
647 dev, dev->export_count);
648 return -EINVAL;
649 }
650
651 ret = strtobool(page, &flag);
652 if (ret < 0)
653 return ret;
654
655 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
656 if (flag) {
657 dev_set_t10_wwn_model_alias(dev);
658 } else {
659 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
660 sizeof(dev->t10_wwn.model));
661 }
662 da->emulate_model_alias = flag;
663 return count;
664 }
665
666 static ssize_t emulate_write_cache_store(struct config_item *item,
667 const char *page, size_t count)
668 {
669 struct se_dev_attrib *da = to_attrib(item);
670 bool flag;
671 int ret;
672
673 ret = strtobool(page, &flag);
674 if (ret < 0)
675 return ret;
676
677 if (flag && da->da_dev->transport->get_write_cache) {
678 pr_err("emulate_write_cache not supported for this device\n");
679 return -EINVAL;
680 }
681
682 da->emulate_write_cache = flag;
683 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
684 da->da_dev, flag);
685 return count;
686 }
687
688 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
689 const char *page, size_t count)
690 {
691 struct se_dev_attrib *da = to_attrib(item);
692 u32 val;
693 int ret;
694
695 ret = kstrtou32(page, 0, &val);
696 if (ret < 0)
697 return ret;
698
699 if (val != 0 && val != 1 && val != 2) {
700 pr_err("Illegal value %d\n", val);
701 return -EINVAL;
702 }
703
704 if (da->da_dev->export_count) {
705 pr_err("dev[%p]: Unable to change SE Device"
706 " UA_INTRLCK_CTRL while export_count is %d\n",
707 da->da_dev, da->da_dev->export_count);
708 return -EINVAL;
709 }
710 da->emulate_ua_intlck_ctrl = val;
711 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
712 da->da_dev, val);
713 return count;
714 }
715
716 static ssize_t emulate_tas_store(struct config_item *item,
717 const char *page, size_t count)
718 {
719 struct se_dev_attrib *da = to_attrib(item);
720 bool flag;
721 int ret;
722
723 ret = strtobool(page, &flag);
724 if (ret < 0)
725 return ret;
726
727 if (da->da_dev->export_count) {
728 pr_err("dev[%p]: Unable to change SE Device TAS while"
729 " export_count is %d\n",
730 da->da_dev, da->da_dev->export_count);
731 return -EINVAL;
732 }
733 da->emulate_tas = flag;
734 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
735 da->da_dev, flag ? "Enabled" : "Disabled");
736
737 return count;
738 }
739
740 static ssize_t emulate_tpu_store(struct config_item *item,
741 const char *page, size_t count)
742 {
743 struct se_dev_attrib *da = to_attrib(item);
744 bool flag;
745 int ret;
746
747 ret = strtobool(page, &flag);
748 if (ret < 0)
749 return ret;
750
751 /*
752 * We expect this value to be non-zero when generic Block Layer
753 * Discard supported is detected iblock_create_virtdevice().
754 */
755 if (flag && !da->max_unmap_block_desc_count) {
756 pr_err("Generic Block Discard not supported\n");
757 return -ENOSYS;
758 }
759
760 da->emulate_tpu = flag;
761 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
762 da->da_dev, flag);
763 return count;
764 }
765
766 static ssize_t emulate_tpws_store(struct config_item *item,
767 const char *page, size_t count)
768 {
769 struct se_dev_attrib *da = to_attrib(item);
770 bool flag;
771 int ret;
772
773 ret = strtobool(page, &flag);
774 if (ret < 0)
775 return ret;
776
777 /*
778 * We expect this value to be non-zero when generic Block Layer
779 * Discard supported is detected iblock_create_virtdevice().
780 */
781 if (flag && !da->max_unmap_block_desc_count) {
782 pr_err("Generic Block Discard not supported\n");
783 return -ENOSYS;
784 }
785
786 da->emulate_tpws = flag;
787 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
788 da->da_dev, flag);
789 return count;
790 }
791
792 static ssize_t pi_prot_type_store(struct config_item *item,
793 const char *page, size_t count)
794 {
795 struct se_dev_attrib *da = to_attrib(item);
796 int old_prot = da->pi_prot_type, ret;
797 struct se_device *dev = da->da_dev;
798 u32 flag;
799
800 ret = kstrtou32(page, 0, &flag);
801 if (ret < 0)
802 return ret;
803
804 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
805 pr_err("Illegal value %d for pi_prot_type\n", flag);
806 return -EINVAL;
807 }
808 if (flag == 2) {
809 pr_err("DIF TYPE2 protection currently not supported\n");
810 return -ENOSYS;
811 }
812 if (da->hw_pi_prot_type) {
813 pr_warn("DIF protection enabled on underlying hardware,"
814 " ignoring\n");
815 return count;
816 }
817 if (!dev->transport->init_prot || !dev->transport->free_prot) {
818 /* 0 is only allowed value for non-supporting backends */
819 if (flag == 0)
820 return count;
821
822 pr_err("DIF protection not supported by backend: %s\n",
823 dev->transport->name);
824 return -ENOSYS;
825 }
826 if (!target_dev_configured(dev)) {
827 pr_err("DIF protection requires device to be configured\n");
828 return -ENODEV;
829 }
830 if (dev->export_count) {
831 pr_err("dev[%p]: Unable to change SE Device PROT type while"
832 " export_count is %d\n", dev, dev->export_count);
833 return -EINVAL;
834 }
835
836 da->pi_prot_type = flag;
837
838 if (flag && !old_prot) {
839 ret = dev->transport->init_prot(dev);
840 if (ret) {
841 da->pi_prot_type = old_prot;
842 da->pi_prot_verify = (bool) da->pi_prot_type;
843 return ret;
844 }
845
846 } else if (!flag && old_prot) {
847 dev->transport->free_prot(dev);
848 }
849
850 da->pi_prot_verify = (bool) da->pi_prot_type;
851 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
852 return count;
853 }
854
855 /* always zero, but attr needs to remain RW to avoid userspace breakage */
856 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
857 {
858 return snprintf(page, PAGE_SIZE, "0\n");
859 }
860
861 static ssize_t pi_prot_format_store(struct config_item *item,
862 const char *page, size_t count)
863 {
864 struct se_dev_attrib *da = to_attrib(item);
865 struct se_device *dev = da->da_dev;
866 bool flag;
867 int ret;
868
869 ret = strtobool(page, &flag);
870 if (ret < 0)
871 return ret;
872
873 if (!flag)
874 return count;
875
876 if (!dev->transport->format_prot) {
877 pr_err("DIF protection format not supported by backend %s\n",
878 dev->transport->name);
879 return -ENOSYS;
880 }
881 if (!target_dev_configured(dev)) {
882 pr_err("DIF protection format requires device to be configured\n");
883 return -ENODEV;
884 }
885 if (dev->export_count) {
886 pr_err("dev[%p]: Unable to format SE Device PROT type while"
887 " export_count is %d\n", dev, dev->export_count);
888 return -EINVAL;
889 }
890
891 ret = dev->transport->format_prot(dev);
892 if (ret)
893 return ret;
894
895 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
896 return count;
897 }
898
899 static ssize_t pi_prot_verify_store(struct config_item *item,
900 const char *page, size_t count)
901 {
902 struct se_dev_attrib *da = to_attrib(item);
903 bool flag;
904 int ret;
905
906 ret = strtobool(page, &flag);
907 if (ret < 0)
908 return ret;
909
910 if (!flag) {
911 da->pi_prot_verify = flag;
912 return count;
913 }
914 if (da->hw_pi_prot_type) {
915 pr_warn("DIF protection enabled on underlying hardware,"
916 " ignoring\n");
917 return count;
918 }
919 if (!da->pi_prot_type) {
920 pr_warn("DIF protection not supported by backend, ignoring\n");
921 return count;
922 }
923 da->pi_prot_verify = flag;
924
925 return count;
926 }
927
928 static ssize_t force_pr_aptpl_store(struct config_item *item,
929 const char *page, size_t count)
930 {
931 struct se_dev_attrib *da = to_attrib(item);
932 bool flag;
933 int ret;
934
935 ret = strtobool(page, &flag);
936 if (ret < 0)
937 return ret;
938 if (da->da_dev->export_count) {
939 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
940 " export_count is %d\n",
941 da->da_dev, da->da_dev->export_count);
942 return -EINVAL;
943 }
944
945 da->force_pr_aptpl = flag;
946 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
947 return count;
948 }
949
950 static ssize_t emulate_rest_reord_store(struct config_item *item,
951 const char *page, size_t count)
952 {
953 struct se_dev_attrib *da = to_attrib(item);
954 bool flag;
955 int ret;
956
957 ret = strtobool(page, &flag);
958 if (ret < 0)
959 return ret;
960
961 if (flag != 0) {
962 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
963 " reordering not implemented\n", da->da_dev);
964 return -ENOSYS;
965 }
966 da->emulate_rest_reord = flag;
967 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
968 da->da_dev, flag);
969 return count;
970 }
971
972 static ssize_t unmap_zeroes_data_store(struct config_item *item,
973 const char *page, size_t count)
974 {
975 struct se_dev_attrib *da = to_attrib(item);
976 bool flag;
977 int ret;
978
979 ret = strtobool(page, &flag);
980 if (ret < 0)
981 return ret;
982
983 if (da->da_dev->export_count) {
984 pr_err("dev[%p]: Unable to change SE Device"
985 " unmap_zeroes_data while export_count is %d\n",
986 da->da_dev, da->da_dev->export_count);
987 return -EINVAL;
988 }
989 /*
990 * We expect this value to be non-zero when generic Block Layer
991 * Discard supported is detected iblock_configure_device().
992 */
993 if (flag && !da->max_unmap_block_desc_count) {
994 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
995 " because max_unmap_block_desc_count is zero\n",
996 da->da_dev);
997 return -ENOSYS;
998 }
999 da->unmap_zeroes_data = flag;
1000 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
1001 da->da_dev, flag);
1002 return count;
1003 }
1004
1005 /*
1006 * Note, this can only be called on unexported SE Device Object.
1007 */
1008 static ssize_t queue_depth_store(struct config_item *item,
1009 const char *page, size_t count)
1010 {
1011 struct se_dev_attrib *da = to_attrib(item);
1012 struct se_device *dev = da->da_dev;
1013 u32 val;
1014 int ret;
1015
1016 ret = kstrtou32(page, 0, &val);
1017 if (ret < 0)
1018 return ret;
1019
1020 if (dev->export_count) {
1021 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1022 " export_count is %d\n",
1023 dev, dev->export_count);
1024 return -EINVAL;
1025 }
1026 if (!val) {
1027 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1028 return -EINVAL;
1029 }
1030
1031 if (val > dev->dev_attrib.queue_depth) {
1032 if (val > dev->dev_attrib.hw_queue_depth) {
1033 pr_err("dev[%p]: Passed queue_depth:"
1034 " %u exceeds TCM/SE_Device MAX"
1035 " TCQ: %u\n", dev, val,
1036 dev->dev_attrib.hw_queue_depth);
1037 return -EINVAL;
1038 }
1039 }
1040 da->queue_depth = dev->queue_depth = val;
1041 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1042 return count;
1043 }
1044
1045 static ssize_t optimal_sectors_store(struct config_item *item,
1046 const char *page, size_t count)
1047 {
1048 struct se_dev_attrib *da = to_attrib(item);
1049 u32 val;
1050 int ret;
1051
1052 ret = kstrtou32(page, 0, &val);
1053 if (ret < 0)
1054 return ret;
1055
1056 if (da->da_dev->export_count) {
1057 pr_err("dev[%p]: Unable to change SE Device"
1058 " optimal_sectors while export_count is %d\n",
1059 da->da_dev, da->da_dev->export_count);
1060 return -EINVAL;
1061 }
1062 if (val > da->hw_max_sectors) {
1063 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1064 " greater than hw_max_sectors: %u\n",
1065 da->da_dev, val, da->hw_max_sectors);
1066 return -EINVAL;
1067 }
1068
1069 da->optimal_sectors = val;
1070 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1071 da->da_dev, val);
1072 return count;
1073 }
1074
1075 static ssize_t block_size_store(struct config_item *item,
1076 const char *page, size_t count)
1077 {
1078 struct se_dev_attrib *da = to_attrib(item);
1079 u32 val;
1080 int ret;
1081
1082 ret = kstrtou32(page, 0, &val);
1083 if (ret < 0)
1084 return ret;
1085
1086 if (da->da_dev->export_count) {
1087 pr_err("dev[%p]: Unable to change SE Device block_size"
1088 " while export_count is %d\n",
1089 da->da_dev, da->da_dev->export_count);
1090 return -EINVAL;
1091 }
1092
1093 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1094 pr_err("dev[%p]: Illegal value for block_device: %u"
1095 " for SE device, must be 512, 1024, 2048 or 4096\n",
1096 da->da_dev, val);
1097 return -EINVAL;
1098 }
1099
1100 da->block_size = val;
1101 if (da->max_bytes_per_io)
1102 da->hw_max_sectors = da->max_bytes_per_io / val;
1103
1104 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1105 da->da_dev, val);
1106 return count;
1107 }
1108
1109 static ssize_t alua_support_show(struct config_item *item, char *page)
1110 {
1111 struct se_dev_attrib *da = to_attrib(item);
1112 u8 flags = da->da_dev->transport->transport_flags;
1113
1114 return snprintf(page, PAGE_SIZE, "%d\n",
1115 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1116 }
1117
1118 static ssize_t pgr_support_show(struct config_item *item, char *page)
1119 {
1120 struct se_dev_attrib *da = to_attrib(item);
1121 u8 flags = da->da_dev->transport->transport_flags;
1122
1123 return snprintf(page, PAGE_SIZE, "%d\n",
1124 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1125 }
1126
1127 CONFIGFS_ATTR(, emulate_model_alias);
1128 CONFIGFS_ATTR(, emulate_dpo);
1129 CONFIGFS_ATTR(, emulate_fua_write);
1130 CONFIGFS_ATTR(, emulate_fua_read);
1131 CONFIGFS_ATTR(, emulate_write_cache);
1132 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1133 CONFIGFS_ATTR(, emulate_tas);
1134 CONFIGFS_ATTR(, emulate_tpu);
1135 CONFIGFS_ATTR(, emulate_tpws);
1136 CONFIGFS_ATTR(, emulate_caw);
1137 CONFIGFS_ATTR(, emulate_3pc);
1138 CONFIGFS_ATTR(, emulate_pr);
1139 CONFIGFS_ATTR(, pi_prot_type);
1140 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1141 CONFIGFS_ATTR(, pi_prot_format);
1142 CONFIGFS_ATTR(, pi_prot_verify);
1143 CONFIGFS_ATTR(, enforce_pr_isids);
1144 CONFIGFS_ATTR(, is_nonrot);
1145 CONFIGFS_ATTR(, emulate_rest_reord);
1146 CONFIGFS_ATTR(, force_pr_aptpl);
1147 CONFIGFS_ATTR_RO(, hw_block_size);
1148 CONFIGFS_ATTR(, block_size);
1149 CONFIGFS_ATTR_RO(, hw_max_sectors);
1150 CONFIGFS_ATTR(, optimal_sectors);
1151 CONFIGFS_ATTR_RO(, hw_queue_depth);
1152 CONFIGFS_ATTR(, queue_depth);
1153 CONFIGFS_ATTR(, max_unmap_lba_count);
1154 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1155 CONFIGFS_ATTR(, unmap_granularity);
1156 CONFIGFS_ATTR(, unmap_granularity_alignment);
1157 CONFIGFS_ATTR(, unmap_zeroes_data);
1158 CONFIGFS_ATTR(, max_write_same_len);
1159 CONFIGFS_ATTR_RO(, alua_support);
1160 CONFIGFS_ATTR_RO(, pgr_support);
1161
1162 /*
1163 * dev_attrib attributes for devices using the target core SBC/SPC
1164 * interpreter. Any backend using spc_parse_cdb should be using
1165 * these.
1166 */
1167 struct configfs_attribute *sbc_attrib_attrs[] = {
1168 &attr_emulate_model_alias,
1169 &attr_emulate_dpo,
1170 &attr_emulate_fua_write,
1171 &attr_emulate_fua_read,
1172 &attr_emulate_write_cache,
1173 &attr_emulate_ua_intlck_ctrl,
1174 &attr_emulate_tas,
1175 &attr_emulate_tpu,
1176 &attr_emulate_tpws,
1177 &attr_emulate_caw,
1178 &attr_emulate_3pc,
1179 &attr_emulate_pr,
1180 &attr_pi_prot_type,
1181 &attr_hw_pi_prot_type,
1182 &attr_pi_prot_format,
1183 &attr_pi_prot_verify,
1184 &attr_enforce_pr_isids,
1185 &attr_is_nonrot,
1186 &attr_emulate_rest_reord,
1187 &attr_force_pr_aptpl,
1188 &attr_hw_block_size,
1189 &attr_block_size,
1190 &attr_hw_max_sectors,
1191 &attr_optimal_sectors,
1192 &attr_hw_queue_depth,
1193 &attr_queue_depth,
1194 &attr_max_unmap_lba_count,
1195 &attr_max_unmap_block_desc_count,
1196 &attr_unmap_granularity,
1197 &attr_unmap_granularity_alignment,
1198 &attr_unmap_zeroes_data,
1199 &attr_max_write_same_len,
1200 &attr_alua_support,
1201 &attr_pgr_support,
1202 NULL,
1203 };
1204 EXPORT_SYMBOL(sbc_attrib_attrs);
1205
1206 /*
1207 * Minimal dev_attrib attributes for devices passing through CDBs.
1208 * In this case we only provide a few read-only attributes for
1209 * backwards compatibility.
1210 */
1211 struct configfs_attribute *passthrough_attrib_attrs[] = {
1212 &attr_hw_pi_prot_type,
1213 &attr_hw_block_size,
1214 &attr_hw_max_sectors,
1215 &attr_hw_queue_depth,
1216 &attr_alua_support,
1217 &attr_pgr_support,
1218 NULL,
1219 };
1220 EXPORT_SYMBOL(passthrough_attrib_attrs);
1221
1222 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1223 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1224
1225 /* End functions for struct config_item_type tb_dev_attrib_cit */
1226
1227 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1228
1229 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1230 {
1231 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1232 }
1233
1234 /*
1235 * STANDARD and VPD page 0x83 T10 Vendor Identification
1236 */
1237 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1238 char *page)
1239 {
1240 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1241 }
1242
1243 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1244 const char *page, size_t count)
1245 {
1246 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1247 struct se_device *dev = t10_wwn->t10_dev;
1248 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1249 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1250 char *stripped = NULL;
1251 size_t len;
1252 int i;
1253
1254 len = strlcpy(buf, page, sizeof(buf));
1255 if (len < sizeof(buf)) {
1256 /* Strip any newline added from userspace. */
1257 stripped = strstrip(buf);
1258 len = strlen(stripped);
1259 }
1260 if (len > INQUIRY_VENDOR_LEN) {
1261 pr_err("Emulated T10 Vendor Identification exceeds"
1262 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1263 "\n");
1264 return -EOVERFLOW;
1265 }
1266
1267 /*
1268 * SPC 4.3.1:
1269 * ASCII data fields shall contain only ASCII printable characters (i.e.,
1270 * code values 20h to 7Eh) and may be terminated with one or more ASCII
1271 * null (00h) characters.
1272 */
1273 for (i = 0; i < len; i++) {
1274 if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) {
1275 pr_err("Emulated T10 Vendor Identification contains"
1276 " non-ASCII-printable characters\n");
1277 return -EINVAL;
1278 }
1279 }
1280
1281 /*
1282 * Check to see if any active exports exist. If they do exist, fail
1283 * here as changing this information on the fly (underneath the
1284 * initiator side OS dependent multipath code) could cause negative
1285 * effects.
1286 */
1287 if (dev->export_count) {
1288 pr_err("Unable to set T10 Vendor Identification while"
1289 " active %d exports exist\n", dev->export_count);
1290 return -EINVAL;
1291 }
1292
1293 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1294 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1295
1296 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1297 " %s\n", dev->t10_wwn.vendor);
1298
1299 return count;
1300 }
1301
1302 /*
1303 * VPD page 0x80 Unit serial
1304 */
1305 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1306 char *page)
1307 {
1308 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1309 &to_t10_wwn(item)->unit_serial[0]);
1310 }
1311
1312 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1313 const char *page, size_t count)
1314 {
1315 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1316 struct se_device *dev = t10_wwn->t10_dev;
1317 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1318
1319 /*
1320 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1321 * from the struct scsi_device level firmware, do not allow
1322 * VPD Unit Serial to be emulated.
1323 *
1324 * Note this struct scsi_device could also be emulating VPD
1325 * information from its drivers/scsi LLD. But for now we assume
1326 * it is doing 'the right thing' wrt a world wide unique
1327 * VPD Unit Serial Number that OS dependent multipath can depend on.
1328 */
1329 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1330 pr_err("Underlying SCSI device firmware provided VPD"
1331 " Unit Serial, ignoring request\n");
1332 return -EOPNOTSUPP;
1333 }
1334
1335 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1336 pr_err("Emulated VPD Unit Serial exceeds"
1337 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1338 return -EOVERFLOW;
1339 }
1340 /*
1341 * Check to see if any active $FABRIC_MOD exports exist. If they
1342 * do exist, fail here as changing this information on the fly
1343 * (underneath the initiator side OS dependent multipath code)
1344 * could cause negative effects.
1345 */
1346 if (dev->export_count) {
1347 pr_err("Unable to set VPD Unit Serial while"
1348 " active %d $FABRIC_MOD exports exist\n",
1349 dev->export_count);
1350 return -EINVAL;
1351 }
1352
1353 /*
1354 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1355 *
1356 * Also, strip any newline added from the userspace
1357 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1358 */
1359 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1360 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1361 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1362 "%s", strstrip(buf));
1363 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1364
1365 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1366 " %s\n", dev->t10_wwn.unit_serial);
1367
1368 return count;
1369 }
1370
1371 /*
1372 * VPD page 0x83 Protocol Identifier
1373 */
1374 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1375 char *page)
1376 {
1377 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1378 struct t10_vpd *vpd;
1379 unsigned char buf[VPD_TMP_BUF_SIZE];
1380 ssize_t len = 0;
1381
1382 memset(buf, 0, VPD_TMP_BUF_SIZE);
1383
1384 spin_lock(&t10_wwn->t10_vpd_lock);
1385 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1386 if (!vpd->protocol_identifier_set)
1387 continue;
1388
1389 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1390
1391 if (len + strlen(buf) >= PAGE_SIZE)
1392 break;
1393
1394 len += sprintf(page+len, "%s", buf);
1395 }
1396 spin_unlock(&t10_wwn->t10_vpd_lock);
1397
1398 return len;
1399 }
1400
1401 /*
1402 * Generic wrapper for dumping VPD identifiers by association.
1403 */
1404 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1405 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1406 char *page) \
1407 { \
1408 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1409 struct t10_vpd *vpd; \
1410 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1411 ssize_t len = 0; \
1412 \
1413 spin_lock(&t10_wwn->t10_vpd_lock); \
1414 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1415 if (vpd->association != _assoc) \
1416 continue; \
1417 \
1418 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1419 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1420 if (len + strlen(buf) >= PAGE_SIZE) \
1421 break; \
1422 len += sprintf(page+len, "%s", buf); \
1423 \
1424 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1425 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1426 if (len + strlen(buf) >= PAGE_SIZE) \
1427 break; \
1428 len += sprintf(page+len, "%s", buf); \
1429 \
1430 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1431 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1432 if (len + strlen(buf) >= PAGE_SIZE) \
1433 break; \
1434 len += sprintf(page+len, "%s", buf); \
1435 } \
1436 spin_unlock(&t10_wwn->t10_vpd_lock); \
1437 \
1438 return len; \
1439 }
1440
1441 /* VPD page 0x83 Association: Logical Unit */
1442 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1443 /* VPD page 0x83 Association: Target Port */
1444 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1445 /* VPD page 0x83 Association: SCSI Target Device */
1446 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1447
1448 CONFIGFS_ATTR(target_wwn_, vendor_id);
1449 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1450 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1451 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1452 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1453 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1454
1455 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1456 &target_wwn_attr_vendor_id,
1457 &target_wwn_attr_vpd_unit_serial,
1458 &target_wwn_attr_vpd_protocol_identifier,
1459 &target_wwn_attr_vpd_assoc_logical_unit,
1460 &target_wwn_attr_vpd_assoc_target_port,
1461 &target_wwn_attr_vpd_assoc_scsi_target_device,
1462 NULL,
1463 };
1464
1465 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1466
1467 /* End functions for struct config_item_type tb_dev_wwn_cit */
1468
1469 /* Start functions for struct config_item_type tb_dev_pr_cit */
1470
1471 static struct se_device *pr_to_dev(struct config_item *item)
1472 {
1473 return container_of(to_config_group(item), struct se_device,
1474 dev_pr_group);
1475 }
1476
1477 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1478 char *page)
1479 {
1480 struct se_node_acl *se_nacl;
1481 struct t10_pr_registration *pr_reg;
1482 char i_buf[PR_REG_ISID_ID_LEN];
1483
1484 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1485
1486 pr_reg = dev->dev_pr_res_holder;
1487 if (!pr_reg)
1488 return sprintf(page, "No SPC-3 Reservation holder\n");
1489
1490 se_nacl = pr_reg->pr_reg_nacl;
1491 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1492
1493 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1494 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1495 se_nacl->initiatorname, i_buf);
1496 }
1497
1498 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1499 char *page)
1500 {
1501 struct se_node_acl *se_nacl;
1502 ssize_t len;
1503
1504 se_nacl = dev->dev_reserved_node_acl;
1505 if (se_nacl) {
1506 len = sprintf(page,
1507 "SPC-2 Reservation: %s Initiator: %s\n",
1508 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1509 se_nacl->initiatorname);
1510 } else {
1511 len = sprintf(page, "No SPC-2 Reservation holder\n");
1512 }
1513 return len;
1514 }
1515
1516 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1517 {
1518 struct se_device *dev = pr_to_dev(item);
1519 int ret;
1520
1521 if (!dev->dev_attrib.emulate_pr)
1522 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1523
1524 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1525 return sprintf(page, "Passthrough\n");
1526
1527 spin_lock(&dev->dev_reservation_lock);
1528 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1529 ret = target_core_dev_pr_show_spc2_res(dev, page);
1530 else
1531 ret = target_core_dev_pr_show_spc3_res(dev, page);
1532 spin_unlock(&dev->dev_reservation_lock);
1533 return ret;
1534 }
1535
1536 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1537 char *page)
1538 {
1539 struct se_device *dev = pr_to_dev(item);
1540 ssize_t len = 0;
1541
1542 spin_lock(&dev->dev_reservation_lock);
1543 if (!dev->dev_pr_res_holder) {
1544 len = sprintf(page, "No SPC-3 Reservation holder\n");
1545 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1546 len = sprintf(page, "SPC-3 Reservation: All Target"
1547 " Ports registration\n");
1548 } else {
1549 len = sprintf(page, "SPC-3 Reservation: Single"
1550 " Target Port registration\n");
1551 }
1552
1553 spin_unlock(&dev->dev_reservation_lock);
1554 return len;
1555 }
1556
1557 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1558 char *page)
1559 {
1560 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1561 }
1562
1563
1564 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1565 char *page)
1566 {
1567 struct se_device *dev = pr_to_dev(item);
1568 struct se_node_acl *se_nacl;
1569 struct se_portal_group *se_tpg;
1570 struct t10_pr_registration *pr_reg;
1571 const struct target_core_fabric_ops *tfo;
1572 ssize_t len = 0;
1573
1574 spin_lock(&dev->dev_reservation_lock);
1575 pr_reg = dev->dev_pr_res_holder;
1576 if (!pr_reg) {
1577 len = sprintf(page, "No SPC-3 Reservation holder\n");
1578 goto out_unlock;
1579 }
1580
1581 se_nacl = pr_reg->pr_reg_nacl;
1582 se_tpg = se_nacl->se_tpg;
1583 tfo = se_tpg->se_tpg_tfo;
1584
1585 len += sprintf(page+len, "SPC-3 Reservation: %s"
1586 " Target Node Endpoint: %s\n", tfo->fabric_name,
1587 tfo->tpg_get_wwn(se_tpg));
1588 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1589 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1590 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1591 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1592 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1593
1594 out_unlock:
1595 spin_unlock(&dev->dev_reservation_lock);
1596 return len;
1597 }
1598
1599
1600 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1601 char *page)
1602 {
1603 struct se_device *dev = pr_to_dev(item);
1604 const struct target_core_fabric_ops *tfo;
1605 struct t10_pr_registration *pr_reg;
1606 unsigned char buf[384];
1607 char i_buf[PR_REG_ISID_ID_LEN];
1608 ssize_t len = 0;
1609 int reg_count = 0;
1610
1611 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1612
1613 spin_lock(&dev->t10_pr.registration_lock);
1614 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1615 pr_reg_list) {
1616
1617 memset(buf, 0, 384);
1618 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1619 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1620 core_pr_dump_initiator_port(pr_reg, i_buf,
1621 PR_REG_ISID_ID_LEN);
1622 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1623 tfo->fabric_name,
1624 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1625 pr_reg->pr_res_generation);
1626
1627 if (len + strlen(buf) >= PAGE_SIZE)
1628 break;
1629
1630 len += sprintf(page+len, "%s", buf);
1631 reg_count++;
1632 }
1633 spin_unlock(&dev->t10_pr.registration_lock);
1634
1635 if (!reg_count)
1636 len += sprintf(page+len, "None\n");
1637
1638 return len;
1639 }
1640
1641 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1642 {
1643 struct se_device *dev = pr_to_dev(item);
1644 struct t10_pr_registration *pr_reg;
1645 ssize_t len = 0;
1646
1647 spin_lock(&dev->dev_reservation_lock);
1648 pr_reg = dev->dev_pr_res_holder;
1649 if (pr_reg) {
1650 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1651 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1652 } else {
1653 len = sprintf(page, "No SPC-3 Reservation holder\n");
1654 }
1655
1656 spin_unlock(&dev->dev_reservation_lock);
1657 return len;
1658 }
1659
1660 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1661 {
1662 struct se_device *dev = pr_to_dev(item);
1663
1664 if (!dev->dev_attrib.emulate_pr)
1665 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1666 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1667 return sprintf(page, "SPC_PASSTHROUGH\n");
1668 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1669 return sprintf(page, "SPC2_RESERVATIONS\n");
1670
1671 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1672 }
1673
1674 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1675 char *page)
1676 {
1677 struct se_device *dev = pr_to_dev(item);
1678
1679 if (!dev->dev_attrib.emulate_pr ||
1680 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1681 return 0;
1682
1683 return sprintf(page, "APTPL Bit Status: %s\n",
1684 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1685 }
1686
1687 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1688 char *page)
1689 {
1690 struct se_device *dev = pr_to_dev(item);
1691
1692 if (!dev->dev_attrib.emulate_pr ||
1693 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1694 return 0;
1695
1696 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1697 }
1698
1699 enum {
1700 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1701 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1702 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1703 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1704 };
1705
1706 static match_table_t tokens = {
1707 {Opt_initiator_fabric, "initiator_fabric=%s"},
1708 {Opt_initiator_node, "initiator_node=%s"},
1709 {Opt_initiator_sid, "initiator_sid=%s"},
1710 {Opt_sa_res_key, "sa_res_key=%s"},
1711 {Opt_res_holder, "res_holder=%d"},
1712 {Opt_res_type, "res_type=%d"},
1713 {Opt_res_scope, "res_scope=%d"},
1714 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1715 {Opt_mapped_lun, "mapped_lun=%u"},
1716 {Opt_target_fabric, "target_fabric=%s"},
1717 {Opt_target_node, "target_node=%s"},
1718 {Opt_tpgt, "tpgt=%d"},
1719 {Opt_port_rtpi, "port_rtpi=%d"},
1720 {Opt_target_lun, "target_lun=%u"},
1721 {Opt_err, NULL}
1722 };
1723
1724 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1725 const char *page, size_t count)
1726 {
1727 struct se_device *dev = pr_to_dev(item);
1728 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1729 unsigned char *t_fabric = NULL, *t_port = NULL;
1730 char *orig, *ptr, *opts;
1731 substring_t args[MAX_OPT_ARGS];
1732 unsigned long long tmp_ll;
1733 u64 sa_res_key = 0;
1734 u64 mapped_lun = 0, target_lun = 0;
1735 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1736 u16 tpgt = 0;
1737 u8 type = 0;
1738
1739 if (!dev->dev_attrib.emulate_pr ||
1740 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1741 return count;
1742 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1743 return count;
1744
1745 if (dev->export_count) {
1746 pr_debug("Unable to process APTPL metadata while"
1747 " active fabric exports exist\n");
1748 return -EINVAL;
1749 }
1750
1751 opts = kstrdup(page, GFP_KERNEL);
1752 if (!opts)
1753 return -ENOMEM;
1754
1755 orig = opts;
1756 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1757 if (!*ptr)
1758 continue;
1759
1760 token = match_token(ptr, tokens, args);
1761 switch (token) {
1762 case Opt_initiator_fabric:
1763 i_fabric = match_strdup(args);
1764 if (!i_fabric) {
1765 ret = -ENOMEM;
1766 goto out;
1767 }
1768 break;
1769 case Opt_initiator_node:
1770 i_port = match_strdup(args);
1771 if (!i_port) {
1772 ret = -ENOMEM;
1773 goto out;
1774 }
1775 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1776 pr_err("APTPL metadata initiator_node="
1777 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1778 PR_APTPL_MAX_IPORT_LEN);
1779 ret = -EINVAL;
1780 break;
1781 }
1782 break;
1783 case Opt_initiator_sid:
1784 isid = match_strdup(args);
1785 if (!isid) {
1786 ret = -ENOMEM;
1787 goto out;
1788 }
1789 if (strlen(isid) >= PR_REG_ISID_LEN) {
1790 pr_err("APTPL metadata initiator_isid"
1791 "= exceeds PR_REG_ISID_LEN: %d\n",
1792 PR_REG_ISID_LEN);
1793 ret = -EINVAL;
1794 break;
1795 }
1796 break;
1797 case Opt_sa_res_key:
1798 ret = match_u64(args, &tmp_ll);
1799 if (ret < 0) {
1800 pr_err("kstrtoull() failed for sa_res_key=\n");
1801 goto out;
1802 }
1803 sa_res_key = (u64)tmp_ll;
1804 break;
1805 /*
1806 * PR APTPL Metadata for Reservation
1807 */
1808 case Opt_res_holder:
1809 ret = match_int(args, &arg);
1810 if (ret)
1811 goto out;
1812 res_holder = arg;
1813 break;
1814 case Opt_res_type:
1815 ret = match_int(args, &arg);
1816 if (ret)
1817 goto out;
1818 type = (u8)arg;
1819 break;
1820 case Opt_res_scope:
1821 ret = match_int(args, &arg);
1822 if (ret)
1823 goto out;
1824 break;
1825 case Opt_res_all_tg_pt:
1826 ret = match_int(args, &arg);
1827 if (ret)
1828 goto out;
1829 all_tg_pt = (int)arg;
1830 break;
1831 case Opt_mapped_lun:
1832 ret = match_u64(args, &tmp_ll);
1833 if (ret)
1834 goto out;
1835 mapped_lun = (u64)tmp_ll;
1836 break;
1837 /*
1838 * PR APTPL Metadata for Target Port
1839 */
1840 case Opt_target_fabric:
1841 t_fabric = match_strdup(args);
1842 if (!t_fabric) {
1843 ret = -ENOMEM;
1844 goto out;
1845 }
1846 break;
1847 case Opt_target_node:
1848 t_port = match_strdup(args);
1849 if (!t_port) {
1850 ret = -ENOMEM;
1851 goto out;
1852 }
1853 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1854 pr_err("APTPL metadata target_node="
1855 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1856 PR_APTPL_MAX_TPORT_LEN);
1857 ret = -EINVAL;
1858 break;
1859 }
1860 break;
1861 case Opt_tpgt:
1862 ret = match_int(args, &arg);
1863 if (ret)
1864 goto out;
1865 tpgt = (u16)arg;
1866 break;
1867 case Opt_port_rtpi:
1868 ret = match_int(args, &arg);
1869 if (ret)
1870 goto out;
1871 break;
1872 case Opt_target_lun:
1873 ret = match_u64(args, &tmp_ll);
1874 if (ret)
1875 goto out;
1876 target_lun = (u64)tmp_ll;
1877 break;
1878 default:
1879 break;
1880 }
1881 }
1882
1883 if (!i_port || !t_port || !sa_res_key) {
1884 pr_err("Illegal parameters for APTPL registration\n");
1885 ret = -EINVAL;
1886 goto out;
1887 }
1888
1889 if (res_holder && !(type)) {
1890 pr_err("Illegal PR type: 0x%02x for reservation"
1891 " holder\n", type);
1892 ret = -EINVAL;
1893 goto out;
1894 }
1895
1896 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1897 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1898 res_holder, all_tg_pt, type);
1899 out:
1900 kfree(i_fabric);
1901 kfree(i_port);
1902 kfree(isid);
1903 kfree(t_fabric);
1904 kfree(t_port);
1905 kfree(orig);
1906 return (ret == 0) ? count : ret;
1907 }
1908
1909
1910 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1911 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1912 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1913 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1914 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1915 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1916 CONFIGFS_ATTR_RO(target_pr_, res_type);
1917 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1918 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1919
1920 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1921 &target_pr_attr_res_holder,
1922 &target_pr_attr_res_pr_all_tgt_pts,
1923 &target_pr_attr_res_pr_generation,
1924 &target_pr_attr_res_pr_holder_tg_port,
1925 &target_pr_attr_res_pr_registered_i_pts,
1926 &target_pr_attr_res_pr_type,
1927 &target_pr_attr_res_type,
1928 &target_pr_attr_res_aptpl_active,
1929 &target_pr_attr_res_aptpl_metadata,
1930 NULL,
1931 };
1932
1933 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1934
1935 /* End functions for struct config_item_type tb_dev_pr_cit */
1936
1937 /* Start functions for struct config_item_type tb_dev_cit */
1938
1939 static inline struct se_device *to_device(struct config_item *item)
1940 {
1941 return container_of(to_config_group(item), struct se_device, dev_group);
1942 }
1943
1944 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1945 {
1946 struct se_device *dev = to_device(item);
1947 int bl = 0;
1948 ssize_t read_bytes = 0;
1949
1950 transport_dump_dev_state(dev, page, &bl);
1951 read_bytes += bl;
1952 read_bytes += dev->transport->show_configfs_dev_params(dev,
1953 page+read_bytes);
1954 return read_bytes;
1955 }
1956
1957 static ssize_t target_dev_control_store(struct config_item *item,
1958 const char *page, size_t count)
1959 {
1960 struct se_device *dev = to_device(item);
1961
1962 return dev->transport->set_configfs_dev_params(dev, page, count);
1963 }
1964
1965 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1966 {
1967 struct se_device *dev = to_device(item);
1968
1969 if (!(dev->dev_flags & DF_USING_ALIAS))
1970 return 0;
1971
1972 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1973 }
1974
1975 static ssize_t target_dev_alias_store(struct config_item *item,
1976 const char *page, size_t count)
1977 {
1978 struct se_device *dev = to_device(item);
1979 struct se_hba *hba = dev->se_hba;
1980 ssize_t read_bytes;
1981
1982 if (count > (SE_DEV_ALIAS_LEN-1)) {
1983 pr_err("alias count: %d exceeds"
1984 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1985 SE_DEV_ALIAS_LEN-1);
1986 return -EINVAL;
1987 }
1988
1989 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1990 if (!read_bytes)
1991 return -EINVAL;
1992 if (dev->dev_alias[read_bytes - 1] == '\n')
1993 dev->dev_alias[read_bytes - 1] = '\0';
1994
1995 dev->dev_flags |= DF_USING_ALIAS;
1996
1997 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1998 config_item_name(&hba->hba_group.cg_item),
1999 config_item_name(&dev->dev_group.cg_item),
2000 dev->dev_alias);
2001
2002 return read_bytes;
2003 }
2004
2005 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2006 {
2007 struct se_device *dev = to_device(item);
2008
2009 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2010 return 0;
2011
2012 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2013 }
2014
2015 static ssize_t target_dev_udev_path_store(struct config_item *item,
2016 const char *page, size_t count)
2017 {
2018 struct se_device *dev = to_device(item);
2019 struct se_hba *hba = dev->se_hba;
2020 ssize_t read_bytes;
2021
2022 if (count > (SE_UDEV_PATH_LEN-1)) {
2023 pr_err("udev_path count: %d exceeds"
2024 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2025 SE_UDEV_PATH_LEN-1);
2026 return -EINVAL;
2027 }
2028
2029 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2030 "%s", page);
2031 if (!read_bytes)
2032 return -EINVAL;
2033 if (dev->udev_path[read_bytes - 1] == '\n')
2034 dev->udev_path[read_bytes - 1] = '\0';
2035
2036 dev->dev_flags |= DF_USING_UDEV_PATH;
2037
2038 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2039 config_item_name(&hba->hba_group.cg_item),
2040 config_item_name(&dev->dev_group.cg_item),
2041 dev->udev_path);
2042
2043 return read_bytes;
2044 }
2045
2046 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2047 {
2048 struct se_device *dev = to_device(item);
2049
2050 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2051 }
2052
2053 static ssize_t target_dev_enable_store(struct config_item *item,
2054 const char *page, size_t count)
2055 {
2056 struct se_device *dev = to_device(item);
2057 char *ptr;
2058 int ret;
2059
2060 ptr = strstr(page, "1");
2061 if (!ptr) {
2062 pr_err("For dev_enable ops, only valid value"
2063 " is \"1\"\n");
2064 return -EINVAL;
2065 }
2066
2067 ret = target_configure_device(dev);
2068 if (ret)
2069 return ret;
2070 return count;
2071 }
2072
2073 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2074 {
2075 struct se_device *dev = to_device(item);
2076 struct config_item *lu_ci;
2077 struct t10_alua_lu_gp *lu_gp;
2078 struct t10_alua_lu_gp_member *lu_gp_mem;
2079 ssize_t len = 0;
2080
2081 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2082 if (!lu_gp_mem)
2083 return 0;
2084
2085 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2086 lu_gp = lu_gp_mem->lu_gp;
2087 if (lu_gp) {
2088 lu_ci = &lu_gp->lu_gp_group.cg_item;
2089 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2090 config_item_name(lu_ci), lu_gp->lu_gp_id);
2091 }
2092 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2093
2094 return len;
2095 }
2096
2097 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2098 const char *page, size_t count)
2099 {
2100 struct se_device *dev = to_device(item);
2101 struct se_hba *hba = dev->se_hba;
2102 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2103 struct t10_alua_lu_gp_member *lu_gp_mem;
2104 unsigned char buf[LU_GROUP_NAME_BUF];
2105 int move = 0;
2106
2107 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2108 if (!lu_gp_mem)
2109 return count;
2110
2111 if (count > LU_GROUP_NAME_BUF) {
2112 pr_err("ALUA LU Group Alias too large!\n");
2113 return -EINVAL;
2114 }
2115 memset(buf, 0, LU_GROUP_NAME_BUF);
2116 memcpy(buf, page, count);
2117 /*
2118 * Any ALUA logical unit alias besides "NULL" means we will be
2119 * making a new group association.
2120 */
2121 if (strcmp(strstrip(buf), "NULL")) {
2122 /*
2123 * core_alua_get_lu_gp_by_name() will increment reference to
2124 * struct t10_alua_lu_gp. This reference is released with
2125 * core_alua_get_lu_gp_by_name below().
2126 */
2127 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2128 if (!lu_gp_new)
2129 return -ENODEV;
2130 }
2131
2132 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2133 lu_gp = lu_gp_mem->lu_gp;
2134 if (lu_gp) {
2135 /*
2136 * Clearing an existing lu_gp association, and replacing
2137 * with NULL
2138 */
2139 if (!lu_gp_new) {
2140 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2141 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2142 " %hu\n",
2143 config_item_name(&hba->hba_group.cg_item),
2144 config_item_name(&dev->dev_group.cg_item),
2145 config_item_name(&lu_gp->lu_gp_group.cg_item),
2146 lu_gp->lu_gp_id);
2147
2148 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2149 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2150
2151 return count;
2152 }
2153 /*
2154 * Removing existing association of lu_gp_mem with lu_gp
2155 */
2156 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2157 move = 1;
2158 }
2159 /*
2160 * Associate lu_gp_mem with lu_gp_new.
2161 */
2162 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2163 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2164
2165 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2166 " core/alua/lu_gps/%s, ID: %hu\n",
2167 (move) ? "Moving" : "Adding",
2168 config_item_name(&hba->hba_group.cg_item),
2169 config_item_name(&dev->dev_group.cg_item),
2170 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2171 lu_gp_new->lu_gp_id);
2172
2173 core_alua_put_lu_gp_from_name(lu_gp_new);
2174 return count;
2175 }
2176
2177 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2178 {
2179 struct se_device *dev = to_device(item);
2180 struct t10_alua_lba_map *map;
2181 struct t10_alua_lba_map_member *mem;
2182 char *b = page;
2183 int bl = 0;
2184 char state;
2185
2186 spin_lock(&dev->t10_alua.lba_map_lock);
2187 if (!list_empty(&dev->t10_alua.lba_map_list))
2188 bl += sprintf(b + bl, "%u %u\n",
2189 dev->t10_alua.lba_map_segment_size,
2190 dev->t10_alua.lba_map_segment_multiplier);
2191 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2192 bl += sprintf(b + bl, "%llu %llu",
2193 map->lba_map_first_lba, map->lba_map_last_lba);
2194 list_for_each_entry(mem, &map->lba_map_mem_list,
2195 lba_map_mem_list) {
2196 switch (mem->lba_map_mem_alua_state) {
2197 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2198 state = 'O';
2199 break;
2200 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2201 state = 'A';
2202 break;
2203 case ALUA_ACCESS_STATE_STANDBY:
2204 state = 'S';
2205 break;
2206 case ALUA_ACCESS_STATE_UNAVAILABLE:
2207 state = 'U';
2208 break;
2209 default:
2210 state = '.';
2211 break;
2212 }
2213 bl += sprintf(b + bl, " %d:%c",
2214 mem->lba_map_mem_alua_pg_id, state);
2215 }
2216 bl += sprintf(b + bl, "\n");
2217 }
2218 spin_unlock(&dev->t10_alua.lba_map_lock);
2219 return bl;
2220 }
2221
2222 static ssize_t target_dev_lba_map_store(struct config_item *item,
2223 const char *page, size_t count)
2224 {
2225 struct se_device *dev = to_device(item);
2226 struct t10_alua_lba_map *lba_map = NULL;
2227 struct list_head lba_list;
2228 char *map_entries, *orig, *ptr;
2229 char state;
2230 int pg_num = -1, pg;
2231 int ret = 0, num = 0, pg_id, alua_state;
2232 unsigned long start_lba = -1, end_lba = -1;
2233 unsigned long segment_size = -1, segment_mult = -1;
2234
2235 orig = map_entries = kstrdup(page, GFP_KERNEL);
2236 if (!map_entries)
2237 return -ENOMEM;
2238
2239 INIT_LIST_HEAD(&lba_list);
2240 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2241 if (!*ptr)
2242 continue;
2243
2244 if (num == 0) {
2245 if (sscanf(ptr, "%lu %lu\n",
2246 &segment_size, &segment_mult) != 2) {
2247 pr_err("Invalid line %d\n", num);
2248 ret = -EINVAL;
2249 break;
2250 }
2251 num++;
2252 continue;
2253 }
2254 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2255 pr_err("Invalid line %d\n", num);
2256 ret = -EINVAL;
2257 break;
2258 }
2259 ptr = strchr(ptr, ' ');
2260 if (!ptr) {
2261 pr_err("Invalid line %d, missing end lba\n", num);
2262 ret = -EINVAL;
2263 break;
2264 }
2265 ptr++;
2266 ptr = strchr(ptr, ' ');
2267 if (!ptr) {
2268 pr_err("Invalid line %d, missing state definitions\n",
2269 num);
2270 ret = -EINVAL;
2271 break;
2272 }
2273 ptr++;
2274 lba_map = core_alua_allocate_lba_map(&lba_list,
2275 start_lba, end_lba);
2276 if (IS_ERR(lba_map)) {
2277 ret = PTR_ERR(lba_map);
2278 break;
2279 }
2280 pg = 0;
2281 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2282 switch (state) {
2283 case 'O':
2284 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2285 break;
2286 case 'A':
2287 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2288 break;
2289 case 'S':
2290 alua_state = ALUA_ACCESS_STATE_STANDBY;
2291 break;
2292 case 'U':
2293 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2294 break;
2295 default:
2296 pr_err("Invalid ALUA state '%c'\n", state);
2297 ret = -EINVAL;
2298 goto out;
2299 }
2300
2301 ret = core_alua_allocate_lba_map_mem(lba_map,
2302 pg_id, alua_state);
2303 if (ret) {
2304 pr_err("Invalid target descriptor %d:%c "
2305 "at line %d\n",
2306 pg_id, state, num);
2307 break;
2308 }
2309 pg++;
2310 ptr = strchr(ptr, ' ');
2311 if (ptr)
2312 ptr++;
2313 else
2314 break;
2315 }
2316 if (pg_num == -1)
2317 pg_num = pg;
2318 else if (pg != pg_num) {
2319 pr_err("Only %d from %d port groups definitions "
2320 "at line %d\n", pg, pg_num, num);
2321 ret = -EINVAL;
2322 break;
2323 }
2324 num++;
2325 }
2326 out:
2327 if (ret) {
2328 core_alua_free_lba_map(&lba_list);
2329 count = ret;
2330 } else
2331 core_alua_set_lba_map(dev, &lba_list,
2332 segment_size, segment_mult);
2333 kfree(orig);
2334 return count;
2335 }
2336
2337 CONFIGFS_ATTR_RO(target_dev_, info);
2338 CONFIGFS_ATTR_WO(target_dev_, control);
2339 CONFIGFS_ATTR(target_dev_, alias);
2340 CONFIGFS_ATTR(target_dev_, udev_path);
2341 CONFIGFS_ATTR(target_dev_, enable);
2342 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2343 CONFIGFS_ATTR(target_dev_, lba_map);
2344
2345 static struct configfs_attribute *target_core_dev_attrs[] = {
2346 &target_dev_attr_info,
2347 &target_dev_attr_control,
2348 &target_dev_attr_alias,
2349 &target_dev_attr_udev_path,
2350 &target_dev_attr_enable,
2351 &target_dev_attr_alua_lu_gp,
2352 &target_dev_attr_lba_map,
2353 NULL,
2354 };
2355
2356 static void target_core_dev_release(struct config_item *item)
2357 {
2358 struct config_group *dev_cg = to_config_group(item);
2359 struct se_device *dev =
2360 container_of(dev_cg, struct se_device, dev_group);
2361
2362 target_free_device(dev);
2363 }
2364
2365 /*
2366 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2367 * within target_fabric_port_link()
2368 */
2369 struct configfs_item_operations target_core_dev_item_ops = {
2370 .release = target_core_dev_release,
2371 };
2372
2373 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2374
2375 /* End functions for struct config_item_type tb_dev_cit */
2376
2377 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2378
2379 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2380 {
2381 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2382 lu_gp_group);
2383 }
2384
2385 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2386 {
2387 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2388
2389 if (!lu_gp->lu_gp_valid_id)
2390 return 0;
2391 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2392 }
2393
2394 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2395 const char *page, size_t count)
2396 {
2397 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2398 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2399 unsigned long lu_gp_id;
2400 int ret;
2401
2402 ret = kstrtoul(page, 0, &lu_gp_id);
2403 if (ret < 0) {
2404 pr_err("kstrtoul() returned %d for"
2405 " lu_gp_id\n", ret);
2406 return ret;
2407 }
2408 if (lu_gp_id > 0x0000ffff) {
2409 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2410 " 0x0000ffff\n", lu_gp_id);
2411 return -EINVAL;
2412 }
2413
2414 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2415 if (ret < 0)
2416 return -EINVAL;
2417
2418 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2419 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2420 config_item_name(&alua_lu_gp_cg->cg_item),
2421 lu_gp->lu_gp_id);
2422
2423 return count;
2424 }
2425
2426 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2427 {
2428 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2429 struct se_device *dev;
2430 struct se_hba *hba;
2431 struct t10_alua_lu_gp_member *lu_gp_mem;
2432 ssize_t len = 0, cur_len;
2433 unsigned char buf[LU_GROUP_NAME_BUF];
2434
2435 memset(buf, 0, LU_GROUP_NAME_BUF);
2436
2437 spin_lock(&lu_gp->lu_gp_lock);
2438 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2439 dev = lu_gp_mem->lu_gp_mem_dev;
2440 hba = dev->se_hba;
2441
2442 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2443 config_item_name(&hba->hba_group.cg_item),
2444 config_item_name(&dev->dev_group.cg_item));
2445 cur_len++; /* Extra byte for NULL terminator */
2446
2447 if ((cur_len + len) > PAGE_SIZE) {
2448 pr_warn("Ran out of lu_gp_show_attr"
2449 "_members buffer\n");
2450 break;
2451 }
2452 memcpy(page+len, buf, cur_len);
2453 len += cur_len;
2454 }
2455 spin_unlock(&lu_gp->lu_gp_lock);
2456
2457 return len;
2458 }
2459
2460 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2461 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2462
2463 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2464 &target_lu_gp_attr_lu_gp_id,
2465 &target_lu_gp_attr_members,
2466 NULL,
2467 };
2468
2469 static void target_core_alua_lu_gp_release(struct config_item *item)
2470 {
2471 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2472 struct t10_alua_lu_gp, lu_gp_group);
2473
2474 core_alua_free_lu_gp(lu_gp);
2475 }
2476
2477 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2478 .release = target_core_alua_lu_gp_release,
2479 };
2480
2481 static const struct config_item_type target_core_alua_lu_gp_cit = {
2482 .ct_item_ops = &target_core_alua_lu_gp_ops,
2483 .ct_attrs = target_core_alua_lu_gp_attrs,
2484 .ct_owner = THIS_MODULE,
2485 };
2486
2487 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2488
2489 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2490
2491 static struct config_group *target_core_alua_create_lu_gp(
2492 struct config_group *group,
2493 const char *name)
2494 {
2495 struct t10_alua_lu_gp *lu_gp;
2496 struct config_group *alua_lu_gp_cg = NULL;
2497 struct config_item *alua_lu_gp_ci = NULL;
2498
2499 lu_gp = core_alua_allocate_lu_gp(name, 0);
2500 if (IS_ERR(lu_gp))
2501 return NULL;
2502
2503 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2504 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2505
2506 config_group_init_type_name(alua_lu_gp_cg, name,
2507 &target_core_alua_lu_gp_cit);
2508
2509 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2510 " Group: core/alua/lu_gps/%s\n",
2511 config_item_name(alua_lu_gp_ci));
2512
2513 return alua_lu_gp_cg;
2514
2515 }
2516
2517 static void target_core_alua_drop_lu_gp(
2518 struct config_group *group,
2519 struct config_item *item)
2520 {
2521 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2522 struct t10_alua_lu_gp, lu_gp_group);
2523
2524 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2525 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2526 config_item_name(item), lu_gp->lu_gp_id);
2527 /*
2528 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2529 * -> target_core_alua_lu_gp_release()
2530 */
2531 config_item_put(item);
2532 }
2533
2534 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2535 .make_group = &target_core_alua_create_lu_gp,
2536 .drop_item = &target_core_alua_drop_lu_gp,
2537 };
2538
2539 static const struct config_item_type target_core_alua_lu_gps_cit = {
2540 .ct_item_ops = NULL,
2541 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2542 .ct_owner = THIS_MODULE,
2543 };
2544
2545 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2546
2547 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2548
2549 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2550 {
2551 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2552 tg_pt_gp_group);
2553 }
2554
2555 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2556 char *page)
2557 {
2558 return sprintf(page, "%d\n",
2559 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2560 }
2561
2562 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2563 const char *page, size_t count)
2564 {
2565 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2566 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2567 unsigned long tmp;
2568 int new_state, ret;
2569
2570 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2571 pr_err("Unable to do implicit ALUA on non valid"
2572 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2573 return -EINVAL;
2574 }
2575 if (!target_dev_configured(dev)) {
2576 pr_err("Unable to set alua_access_state while device is"
2577 " not configured\n");
2578 return -ENODEV;
2579 }
2580
2581 ret = kstrtoul(page, 0, &tmp);
2582 if (ret < 0) {
2583 pr_err("Unable to extract new ALUA access state from"
2584 " %s\n", page);
2585 return ret;
2586 }
2587 new_state = (int)tmp;
2588
2589 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2590 pr_err("Unable to process implicit configfs ALUA"
2591 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2592 return -EINVAL;
2593 }
2594 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2595 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2596 /* LBA DEPENDENT is only allowed with implicit ALUA */
2597 pr_err("Unable to process implicit configfs ALUA transition"
2598 " while explicit ALUA management is enabled\n");
2599 return -EINVAL;
2600 }
2601
2602 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2603 NULL, NULL, new_state, 0);
2604 return (!ret) ? count : -EINVAL;
2605 }
2606
2607 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2608 char *page)
2609 {
2610 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2611 return sprintf(page, "%s\n",
2612 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2613 }
2614
2615 static ssize_t target_tg_pt_gp_alua_access_status_store(
2616 struct config_item *item, const char *page, size_t count)
2617 {
2618 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2619 unsigned long tmp;
2620 int new_status, ret;
2621
2622 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2623 pr_err("Unable to do set ALUA access status on non"
2624 " valid tg_pt_gp ID: %hu\n",
2625 tg_pt_gp->tg_pt_gp_valid_id);
2626 return -EINVAL;
2627 }
2628
2629 ret = kstrtoul(page, 0, &tmp);
2630 if (ret < 0) {
2631 pr_err("Unable to extract new ALUA access status"
2632 " from %s\n", page);
2633 return ret;
2634 }
2635 new_status = (int)tmp;
2636
2637 if ((new_status != ALUA_STATUS_NONE) &&
2638 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2639 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2640 pr_err("Illegal ALUA access status: 0x%02x\n",
2641 new_status);
2642 return -EINVAL;
2643 }
2644
2645 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2646 return count;
2647 }
2648
2649 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2650 char *page)
2651 {
2652 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2653 }
2654
2655 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2656 const char *page, size_t count)
2657 {
2658 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2659 }
2660
2661 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2662 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2663 struct config_item *item, char *p) \
2664 { \
2665 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2666 return sprintf(p, "%d\n", \
2667 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2668 } \
2669 \
2670 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2671 struct config_item *item, const char *p, size_t c) \
2672 { \
2673 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2674 unsigned long tmp; \
2675 int ret; \
2676 \
2677 if (!t->tg_pt_gp_valid_id) { \
2678 pr_err("Unable to do set " #_name " ALUA state on non" \
2679 " valid tg_pt_gp ID: %hu\n", \
2680 t->tg_pt_gp_valid_id); \
2681 return -EINVAL; \
2682 } \
2683 \
2684 ret = kstrtoul(p, 0, &tmp); \
2685 if (ret < 0) { \
2686 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2687 return -EINVAL; \
2688 } \
2689 if (tmp > 1) { \
2690 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2691 return -EINVAL; \
2692 } \
2693 if (tmp) \
2694 t->tg_pt_gp_alua_supported_states |= _bit; \
2695 else \
2696 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2697 \
2698 return c; \
2699 }
2700
2701 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2702 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2703 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2704 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2705 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2706 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2707 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2708
2709 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2710 struct config_item *item, char *page)
2711 {
2712 return sprintf(page, "%d\n",
2713 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2714 }
2715
2716 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2717 struct config_item *item, const char *page, size_t count)
2718 {
2719 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2720 unsigned long tmp;
2721 int ret;
2722
2723 ret = kstrtoul(page, 0, &tmp);
2724 if (ret < 0) {
2725 pr_err("Unable to extract alua_write_metadata\n");
2726 return ret;
2727 }
2728
2729 if ((tmp != 0) && (tmp != 1)) {
2730 pr_err("Illegal value for alua_write_metadata:"
2731 " %lu\n", tmp);
2732 return -EINVAL;
2733 }
2734 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2735
2736 return count;
2737 }
2738
2739 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2740 char *page)
2741 {
2742 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2743 }
2744
2745 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2746 const char *page, size_t count)
2747 {
2748 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2749 count);
2750 }
2751
2752 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2753 char *page)
2754 {
2755 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2756 }
2757
2758 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2759 const char *page, size_t count)
2760 {
2761 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2762 count);
2763 }
2764
2765 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2766 struct config_item *item, char *page)
2767 {
2768 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2769 }
2770
2771 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2772 struct config_item *item, const char *page, size_t count)
2773 {
2774 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2775 count);
2776 }
2777
2778 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2779 char *page)
2780 {
2781 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2782 }
2783
2784 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2785 const char *page, size_t count)
2786 {
2787 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2788 }
2789
2790 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2791 char *page)
2792 {
2793 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2794
2795 if (!tg_pt_gp->tg_pt_gp_valid_id)
2796 return 0;
2797 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2798 }
2799
2800 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2801 const char *page, size_t count)
2802 {
2803 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2804 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2805 unsigned long tg_pt_gp_id;
2806 int ret;
2807
2808 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2809 if (ret < 0) {
2810 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2811 page);
2812 return ret;
2813 }
2814 if (tg_pt_gp_id > 0x0000ffff) {
2815 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2816 tg_pt_gp_id);
2817 return -EINVAL;
2818 }
2819
2820 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2821 if (ret < 0)
2822 return -EINVAL;
2823
2824 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2825 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2826 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2827 tg_pt_gp->tg_pt_gp_id);
2828
2829 return count;
2830 }
2831
2832 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2833 char *page)
2834 {
2835 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2836 struct se_lun *lun;
2837 ssize_t len = 0, cur_len;
2838 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2839
2840 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2841
2842 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2843 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2844 lun_tg_pt_gp_link) {
2845 struct se_portal_group *tpg = lun->lun_tpg;
2846
2847 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2848 "/%s\n", tpg->se_tpg_tfo->fabric_name,
2849 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2850 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2851 config_item_name(&lun->lun_group.cg_item));
2852 cur_len++; /* Extra byte for NULL terminator */
2853
2854 if ((cur_len + len) > PAGE_SIZE) {
2855 pr_warn("Ran out of lu_gp_show_attr"
2856 "_members buffer\n");
2857 break;
2858 }
2859 memcpy(page+len, buf, cur_len);
2860 len += cur_len;
2861 }
2862 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2863
2864 return len;
2865 }
2866
2867 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2868 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2869 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2870 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2871 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2872 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2873 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2874 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2875 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2876 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2877 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2878 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2879 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2880 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2881 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2882 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2883 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2884
2885 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2886 &target_tg_pt_gp_attr_alua_access_state,
2887 &target_tg_pt_gp_attr_alua_access_status,
2888 &target_tg_pt_gp_attr_alua_access_type,
2889 &target_tg_pt_gp_attr_alua_support_transitioning,
2890 &target_tg_pt_gp_attr_alua_support_offline,
2891 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2892 &target_tg_pt_gp_attr_alua_support_unavailable,
2893 &target_tg_pt_gp_attr_alua_support_standby,
2894 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2895 &target_tg_pt_gp_attr_alua_support_active_optimized,
2896 &target_tg_pt_gp_attr_alua_write_metadata,
2897 &target_tg_pt_gp_attr_nonop_delay_msecs,
2898 &target_tg_pt_gp_attr_trans_delay_msecs,
2899 &target_tg_pt_gp_attr_implicit_trans_secs,
2900 &target_tg_pt_gp_attr_preferred,
2901 &target_tg_pt_gp_attr_tg_pt_gp_id,
2902 &target_tg_pt_gp_attr_members,
2903 NULL,
2904 };
2905
2906 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2907 {
2908 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2909 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2910
2911 core_alua_free_tg_pt_gp(tg_pt_gp);
2912 }
2913
2914 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2915 .release = target_core_alua_tg_pt_gp_release,
2916 };
2917
2918 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
2919 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2920 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2921 .ct_owner = THIS_MODULE,
2922 };
2923
2924 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2925
2926 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2927
2928 static struct config_group *target_core_alua_create_tg_pt_gp(
2929 struct config_group *group,
2930 const char *name)
2931 {
2932 struct t10_alua *alua = container_of(group, struct t10_alua,
2933 alua_tg_pt_gps_group);
2934 struct t10_alua_tg_pt_gp *tg_pt_gp;
2935 struct config_group *alua_tg_pt_gp_cg = NULL;
2936 struct config_item *alua_tg_pt_gp_ci = NULL;
2937
2938 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2939 if (!tg_pt_gp)
2940 return NULL;
2941
2942 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2943 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2944
2945 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2946 &target_core_alua_tg_pt_gp_cit);
2947
2948 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2949 " Group: alua/tg_pt_gps/%s\n",
2950 config_item_name(alua_tg_pt_gp_ci));
2951
2952 return alua_tg_pt_gp_cg;
2953 }
2954
2955 static void target_core_alua_drop_tg_pt_gp(
2956 struct config_group *group,
2957 struct config_item *item)
2958 {
2959 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2960 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2961
2962 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2963 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2964 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2965 /*
2966 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2967 * -> target_core_alua_tg_pt_gp_release().
2968 */
2969 config_item_put(item);
2970 }
2971
2972 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2973 .make_group = &target_core_alua_create_tg_pt_gp,
2974 .drop_item = &target_core_alua_drop_tg_pt_gp,
2975 };
2976
2977 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2978
2979 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2980
2981 /* Start functions for struct config_item_type target_core_alua_cit */
2982
2983 /*
2984 * target_core_alua_cit is a ConfigFS group that lives under
2985 * /sys/kernel/config/target/core/alua. There are default groups
2986 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2987 * target_core_alua_cit in target_core_init_configfs() below.
2988 */
2989 static const struct config_item_type target_core_alua_cit = {
2990 .ct_item_ops = NULL,
2991 .ct_attrs = NULL,
2992 .ct_owner = THIS_MODULE,
2993 };
2994
2995 /* End functions for struct config_item_type target_core_alua_cit */
2996
2997 /* Start functions for struct config_item_type tb_dev_stat_cit */
2998
2999 static struct config_group *target_core_stat_mkdir(
3000 struct config_group *group,
3001 const char *name)
3002 {
3003 return ERR_PTR(-ENOSYS);
3004 }
3005
3006 static void target_core_stat_rmdir(
3007 struct config_group *group,
3008 struct config_item *item)
3009 {
3010 return;
3011 }
3012
3013 static struct configfs_group_operations target_core_stat_group_ops = {
3014 .make_group = &target_core_stat_mkdir,
3015 .drop_item = &target_core_stat_rmdir,
3016 };
3017
3018 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3019
3020 /* End functions for struct config_item_type tb_dev_stat_cit */
3021
3022 /* Start functions for struct config_item_type target_core_hba_cit */
3023
3024 static struct config_group *target_core_make_subdev(
3025 struct config_group *group,
3026 const char *name)
3027 {
3028 struct t10_alua_tg_pt_gp *tg_pt_gp;
3029 struct config_item *hba_ci = &group->cg_item;
3030 struct se_hba *hba = item_to_hba(hba_ci);
3031 struct target_backend *tb = hba->backend;
3032 struct se_device *dev;
3033 int errno = -ENOMEM, ret;
3034
3035 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3036 if (ret)
3037 return ERR_PTR(ret);
3038
3039 dev = target_alloc_device(hba, name);
3040 if (!dev)
3041 goto out_unlock;
3042
3043 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3044
3045 config_group_init_type_name(&dev->dev_action_group, "action",
3046 &tb->tb_dev_action_cit);
3047 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3048
3049 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3050 &tb->tb_dev_attrib_cit);
3051 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3052
3053 config_group_init_type_name(&dev->dev_pr_group, "pr",
3054 &tb->tb_dev_pr_cit);
3055 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3056
3057 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3058 &tb->tb_dev_wwn_cit);
3059 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3060 &dev->dev_group);
3061
3062 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3063 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3064 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3065 &dev->dev_group);
3066
3067 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3068 "statistics", &tb->tb_dev_stat_cit);
3069 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3070 &dev->dev_group);
3071
3072 /*
3073 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3074 */
3075 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3076 if (!tg_pt_gp)
3077 goto out_free_device;
3078 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3079
3080 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3081 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3082 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3083 &dev->t10_alua.alua_tg_pt_gps_group);
3084
3085 /*
3086 * Add core/$HBA/$DEV/statistics/ default groups
3087 */
3088 target_stat_setup_dev_default_groups(dev);
3089
3090 mutex_unlock(&hba->hba_access_mutex);
3091 return &dev->dev_group;
3092
3093 out_free_device:
3094 target_free_device(dev);
3095 out_unlock:
3096 mutex_unlock(&hba->hba_access_mutex);
3097 return ERR_PTR(errno);
3098 }
3099
3100 static void target_core_drop_subdev(
3101 struct config_group *group,
3102 struct config_item *item)
3103 {
3104 struct config_group *dev_cg = to_config_group(item);
3105 struct se_device *dev =
3106 container_of(dev_cg, struct se_device, dev_group);
3107 struct se_hba *hba;
3108
3109 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3110
3111 mutex_lock(&hba->hba_access_mutex);
3112
3113 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3114 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3115
3116 /*
3117 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3118 * directly from target_core_alua_tg_pt_gp_release().
3119 */
3120 dev->t10_alua.default_tg_pt_gp = NULL;
3121
3122 configfs_remove_default_groups(dev_cg);
3123
3124 /*
3125 * se_dev is released from target_core_dev_item_ops->release()
3126 */
3127 config_item_put(item);
3128 mutex_unlock(&hba->hba_access_mutex);
3129 }
3130
3131 static struct configfs_group_operations target_core_hba_group_ops = {
3132 .make_group = target_core_make_subdev,
3133 .drop_item = target_core_drop_subdev,
3134 };
3135
3136
3137 static inline struct se_hba *to_hba(struct config_item *item)
3138 {
3139 return container_of(to_config_group(item), struct se_hba, hba_group);
3140 }
3141
3142 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3143 {
3144 struct se_hba *hba = to_hba(item);
3145
3146 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3147 hba->hba_id, hba->backend->ops->name,
3148 TARGET_CORE_VERSION);
3149 }
3150
3151 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3152 {
3153 struct se_hba *hba = to_hba(item);
3154 int hba_mode = 0;
3155
3156 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3157 hba_mode = 1;
3158
3159 return sprintf(page, "%d\n", hba_mode);
3160 }
3161
3162 static ssize_t target_hba_mode_store(struct config_item *item,
3163 const char *page, size_t count)
3164 {
3165 struct se_hba *hba = to_hba(item);
3166 unsigned long mode_flag;
3167 int ret;
3168
3169 if (hba->backend->ops->pmode_enable_hba == NULL)
3170 return -EINVAL;
3171
3172 ret = kstrtoul(page, 0, &mode_flag);
3173 if (ret < 0) {
3174 pr_err("Unable to extract hba mode flag: %d\n", ret);
3175 return ret;
3176 }
3177
3178 if (hba->dev_count) {
3179 pr_err("Unable to set hba_mode with active devices\n");
3180 return -EINVAL;
3181 }
3182
3183 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3184 if (ret < 0)
3185 return -EINVAL;
3186 if (ret > 0)
3187 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3188 else if (ret == 0)
3189 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3190
3191 return count;
3192 }
3193
3194 CONFIGFS_ATTR_RO(target_, hba_info);
3195 CONFIGFS_ATTR(target_, hba_mode);
3196
3197 static void target_core_hba_release(struct config_item *item)
3198 {
3199 struct se_hba *hba = container_of(to_config_group(item),
3200 struct se_hba, hba_group);
3201 core_delete_hba(hba);
3202 }
3203
3204 static struct configfs_attribute *target_core_hba_attrs[] = {
3205 &target_attr_hba_info,
3206 &target_attr_hba_mode,
3207 NULL,
3208 };
3209
3210 static struct configfs_item_operations target_core_hba_item_ops = {
3211 .release = target_core_hba_release,
3212 };
3213
3214 static const struct config_item_type target_core_hba_cit = {
3215 .ct_item_ops = &target_core_hba_item_ops,
3216 .ct_group_ops = &target_core_hba_group_ops,
3217 .ct_attrs = target_core_hba_attrs,
3218 .ct_owner = THIS_MODULE,
3219 };
3220
3221 static struct config_group *target_core_call_addhbatotarget(
3222 struct config_group *group,
3223 const char *name)
3224 {
3225 char *se_plugin_str, *str, *str2;
3226 struct se_hba *hba;
3227 char buf[TARGET_CORE_NAME_MAX_LEN];
3228 unsigned long plugin_dep_id = 0;
3229 int ret;
3230
3231 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3232 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3233 pr_err("Passed *name strlen(): %d exceeds"
3234 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3235 TARGET_CORE_NAME_MAX_LEN);
3236 return ERR_PTR(-ENAMETOOLONG);
3237 }
3238 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3239
3240 str = strstr(buf, "_");
3241 if (!str) {
3242 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3243 return ERR_PTR(-EINVAL);
3244 }
3245 se_plugin_str = buf;
3246 /*
3247 * Special case for subsystem plugins that have "_" in their names.
3248 * Namely rd_direct and rd_mcp..
3249 */
3250 str2 = strstr(str+1, "_");
3251 if (str2) {
3252 *str2 = '\0'; /* Terminate for *se_plugin_str */
3253 str2++; /* Skip to start of plugin dependent ID */
3254 str = str2;
3255 } else {
3256 *str = '\0'; /* Terminate for *se_plugin_str */
3257 str++; /* Skip to start of plugin dependent ID */
3258 }
3259
3260 ret = kstrtoul(str, 0, &plugin_dep_id);
3261 if (ret < 0) {
3262 pr_err("kstrtoul() returned %d for"
3263 " plugin_dep_id\n", ret);
3264 return ERR_PTR(ret);
3265 }
3266 /*
3267 * Load up TCM subsystem plugins if they have not already been loaded.
3268 */
3269 transport_subsystem_check_init();
3270
3271 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3272 if (IS_ERR(hba))
3273 return ERR_CAST(hba);
3274
3275 config_group_init_type_name(&hba->hba_group, name,
3276 &target_core_hba_cit);
3277
3278 return &hba->hba_group;
3279 }
3280
3281 static void target_core_call_delhbafromtarget(
3282 struct config_group *group,
3283 struct config_item *item)
3284 {
3285 /*
3286 * core_delete_hba() is called from target_core_hba_item_ops->release()
3287 * -> target_core_hba_release()
3288 */
3289 config_item_put(item);
3290 }
3291
3292 static struct configfs_group_operations target_core_group_ops = {
3293 .make_group = target_core_call_addhbatotarget,
3294 .drop_item = target_core_call_delhbafromtarget,
3295 };
3296
3297 static const struct config_item_type target_core_cit = {
3298 .ct_item_ops = NULL,
3299 .ct_group_ops = &target_core_group_ops,
3300 .ct_attrs = NULL,
3301 .ct_owner = THIS_MODULE,
3302 };
3303
3304 /* Stop functions for struct config_item_type target_core_hba_cit */
3305
3306 void target_setup_backend_cits(struct target_backend *tb)
3307 {
3308 target_core_setup_dev_cit(tb);
3309 target_core_setup_dev_action_cit(tb);
3310 target_core_setup_dev_attrib_cit(tb);
3311 target_core_setup_dev_pr_cit(tb);
3312 target_core_setup_dev_wwn_cit(tb);
3313 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3314 target_core_setup_dev_stat_cit(tb);
3315 }
3316
3317 static void target_init_dbroot(void)
3318 {
3319 struct file *fp;
3320
3321 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3322 fp = filp_open(db_root_stage, O_RDONLY, 0);
3323 if (IS_ERR(fp)) {
3324 pr_err("db_root: cannot open: %s\n", db_root_stage);
3325 return;
3326 }
3327 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3328 filp_close(fp, NULL);
3329 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3330 return;
3331 }
3332 filp_close(fp, NULL);
3333
3334 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3335 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3336 }
3337
3338 static int __init target_core_init_configfs(void)
3339 {
3340 struct configfs_subsystem *subsys = &target_core_fabrics;
3341 struct t10_alua_lu_gp *lu_gp;
3342 int ret;
3343
3344 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3345 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3346 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3347
3348 config_group_init(&subsys->su_group);
3349 mutex_init(&subsys->su_mutex);
3350
3351 ret = init_se_kmem_caches();
3352 if (ret < 0)
3353 return ret;
3354 /*
3355 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3356 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3357 */
3358 config_group_init_type_name(&target_core_hbagroup, "core",
3359 &target_core_cit);
3360 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3361
3362 /*
3363 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3364 */
3365 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3366 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3367
3368 /*
3369 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3370 * groups under /sys/kernel/config/target/core/alua/
3371 */
3372 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3373 &target_core_alua_lu_gps_cit);
3374 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3375
3376 /*
3377 * Add core/alua/lu_gps/default_lu_gp
3378 */
3379 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3380 if (IS_ERR(lu_gp)) {
3381 ret = -ENOMEM;
3382 goto out_global;
3383 }
3384
3385 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3386 &target_core_alua_lu_gp_cit);
3387 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3388
3389 default_lu_gp = lu_gp;
3390
3391 /*
3392 * Register the target_core_mod subsystem with configfs.
3393 */
3394 ret = configfs_register_subsystem(subsys);
3395 if (ret < 0) {
3396 pr_err("Error %d while registering subsystem %s\n",
3397 ret, subsys->su_group.cg_item.ci_namebuf);
3398 goto out_global;
3399 }
3400 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3401 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3402 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3403 /*
3404 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3405 */
3406 ret = rd_module_init();
3407 if (ret < 0)
3408 goto out;
3409
3410 ret = core_dev_setup_virtual_lun0();
3411 if (ret < 0)
3412 goto out;
3413
3414 ret = target_xcopy_setup_pt();
3415 if (ret < 0)
3416 goto out;
3417
3418 target_init_dbroot();
3419
3420 return 0;
3421
3422 out:
3423 configfs_unregister_subsystem(subsys);
3424 core_dev_release_virtual_lun0();
3425 rd_module_exit();
3426 out_global:
3427 if (default_lu_gp) {
3428 core_alua_free_lu_gp(default_lu_gp);
3429 default_lu_gp = NULL;
3430 }
3431 release_se_kmem_caches();
3432 return ret;
3433 }
3434
3435 static void __exit target_core_exit_configfs(void)
3436 {
3437 configfs_remove_default_groups(&alua_lu_gps_group);
3438 configfs_remove_default_groups(&alua_group);
3439 configfs_remove_default_groups(&target_core_hbagroup);
3440
3441 /*
3442 * We expect subsys->su_group.default_groups to be released
3443 * by configfs subsystem provider logic..
3444 */
3445 configfs_unregister_subsystem(&target_core_fabrics);
3446
3447 core_alua_free_lu_gp(default_lu_gp);
3448 default_lu_gp = NULL;
3449
3450 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3451 " Infrastructure\n");
3452
3453 core_dev_release_virtual_lun0();
3454 rd_module_exit();
3455 target_xcopy_release_pt();
3456 release_se_kmem_caches();
3457 }
3458
3459 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3460 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3461 MODULE_LICENSE("GPL");
3462
3463 module_init(target_core_init_configfs);
3464 module_exit(target_core_exit_configfs);
Linux with added FPC-III support