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Merge branch 'next-seccomp' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[mirror_ubuntu-focal-kernel.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43
44 #include "target_core_internal.h"
45 #include "target_core_alua.h"
46 #include "target_core_pr.h"
47 #include "target_core_rd.h"
48 #include "target_core_xcopy.h"
49
50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
52 { \
53 struct config_item_type *cit = &tb->tb_##_name##_cit; \
54 \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = _attrs; \
58 cit->ct_owner = tb->ops->owner; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
60 }
61
62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
64 { \
65 struct config_item_type *cit = &tb->tb_##_name##_cit; \
66 \
67 cit->ct_item_ops = _item_ops; \
68 cit->ct_group_ops = _group_ops; \
69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
70 cit->ct_owner = tb->ops->owner; \
71 pr_debug("Setup generic %s\n", __stringify(_name)); \
72 }
73
74 extern struct t10_alua_lu_gp *default_lu_gp;
75
76 static LIST_HEAD(g_tf_list);
77 static DEFINE_MUTEX(g_tf_lock);
78
79 static struct config_group target_core_hbagroup;
80 static struct config_group alua_group;
81 static struct config_group alua_lu_gps_group;
82
83 static inline struct se_hba *
84 item_to_hba(struct config_item *item)
85 {
86 return container_of(to_config_group(item), struct se_hba, hba_group);
87 }
88
89 /*
90 * Attributes for /sys/kernel/config/target/
91 */
92 static ssize_t target_core_item_version_show(struct config_item *item,
93 char *page)
94 {
95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
97 utsname()->sysname, utsname()->machine);
98 }
99
100 CONFIGFS_ATTR_RO(target_core_item_, version);
101
102 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
103 static char db_root_stage[DB_ROOT_LEN];
104
105 static ssize_t target_core_item_dbroot_show(struct config_item *item,
106 char *page)
107 {
108 return sprintf(page, "%s\n", db_root);
109 }
110
111 static ssize_t target_core_item_dbroot_store(struct config_item *item,
112 const char *page, size_t count)
113 {
114 ssize_t read_bytes;
115 struct file *fp;
116
117 mutex_lock(&g_tf_lock);
118 if (!list_empty(&g_tf_list)) {
119 mutex_unlock(&g_tf_lock);
120 pr_err("db_root: cannot be changed: target drivers registered");
121 return -EINVAL;
122 }
123
124 if (count > (DB_ROOT_LEN - 1)) {
125 mutex_unlock(&g_tf_lock);
126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
127 (int)count, DB_ROOT_LEN - 1);
128 return -EINVAL;
129 }
130
131 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
132 if (!read_bytes) {
133 mutex_unlock(&g_tf_lock);
134 return -EINVAL;
135 }
136 if (db_root_stage[read_bytes - 1] == '\n')
137 db_root_stage[read_bytes - 1] = '\0';
138
139 /* validate new db root before accepting it */
140 fp = filp_open(db_root_stage, O_RDONLY, 0);
141 if (IS_ERR(fp)) {
142 mutex_unlock(&g_tf_lock);
143 pr_err("db_root: cannot open: %s\n", db_root_stage);
144 return -EINVAL;
145 }
146 if (!S_ISDIR(file_inode(fp)->i_mode)) {
147 filp_close(fp, NULL);
148 mutex_unlock(&g_tf_lock);
149 pr_err("db_root: not a directory: %s\n", db_root_stage);
150 return -EINVAL;
151 }
152 filp_close(fp, NULL);
153
154 strncpy(db_root, db_root_stage, read_bytes);
155
156 mutex_unlock(&g_tf_lock);
157
158 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 static ssize_t pi_prot_format_store(struct config_item *item,
856 const char *page, size_t count)
857 {
858 struct se_dev_attrib *da = to_attrib(item);
859 struct se_device *dev = da->da_dev;
860 bool flag;
861 int ret;
862
863 ret = strtobool(page, &flag);
864 if (ret < 0)
865 return ret;
866
867 if (!flag)
868 return count;
869
870 if (!dev->transport->format_prot) {
871 pr_err("DIF protection format not supported by backend %s\n",
872 dev->transport->name);
873 return -ENOSYS;
874 }
875 if (!target_dev_configured(dev)) {
876 pr_err("DIF protection format requires device to be configured\n");
877 return -ENODEV;
878 }
879 if (dev->export_count) {
880 pr_err("dev[%p]: Unable to format SE Device PROT type while"
881 " export_count is %d\n", dev, dev->export_count);
882 return -EINVAL;
883 }
884
885 ret = dev->transport->format_prot(dev);
886 if (ret)
887 return ret;
888
889 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
890 return count;
891 }
892
893 static ssize_t pi_prot_verify_store(struct config_item *item,
894 const char *page, size_t count)
895 {
896 struct se_dev_attrib *da = to_attrib(item);
897 bool flag;
898 int ret;
899
900 ret = strtobool(page, &flag);
901 if (ret < 0)
902 return ret;
903
904 if (!flag) {
905 da->pi_prot_verify = flag;
906 return count;
907 }
908 if (da->hw_pi_prot_type) {
909 pr_warn("DIF protection enabled on underlying hardware,"
910 " ignoring\n");
911 return count;
912 }
913 if (!da->pi_prot_type) {
914 pr_warn("DIF protection not supported by backend, ignoring\n");
915 return count;
916 }
917 da->pi_prot_verify = flag;
918
919 return count;
920 }
921
922 static ssize_t force_pr_aptpl_store(struct config_item *item,
923 const char *page, size_t count)
924 {
925 struct se_dev_attrib *da = to_attrib(item);
926 bool flag;
927 int ret;
928
929 ret = strtobool(page, &flag);
930 if (ret < 0)
931 return ret;
932 if (da->da_dev->export_count) {
933 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
934 " export_count is %d\n",
935 da->da_dev, da->da_dev->export_count);
936 return -EINVAL;
937 }
938
939 da->force_pr_aptpl = flag;
940 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
941 return count;
942 }
943
944 static ssize_t emulate_rest_reord_store(struct config_item *item,
945 const char *page, size_t count)
946 {
947 struct se_dev_attrib *da = to_attrib(item);
948 bool flag;
949 int ret;
950
951 ret = strtobool(page, &flag);
952 if (ret < 0)
953 return ret;
954
955 if (flag != 0) {
956 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
957 " reordering not implemented\n", da->da_dev);
958 return -ENOSYS;
959 }
960 da->emulate_rest_reord = flag;
961 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
962 da->da_dev, flag);
963 return count;
964 }
965
966 static ssize_t unmap_zeroes_data_store(struct config_item *item,
967 const char *page, size_t count)
968 {
969 struct se_dev_attrib *da = to_attrib(item);
970 bool flag;
971 int ret;
972
973 ret = strtobool(page, &flag);
974 if (ret < 0)
975 return ret;
976
977 if (da->da_dev->export_count) {
978 pr_err("dev[%p]: Unable to change SE Device"
979 " unmap_zeroes_data while export_count is %d\n",
980 da->da_dev, da->da_dev->export_count);
981 return -EINVAL;
982 }
983 /*
984 * We expect this value to be non-zero when generic Block Layer
985 * Discard supported is detected iblock_configure_device().
986 */
987 if (flag && !da->max_unmap_block_desc_count) {
988 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
989 " because max_unmap_block_desc_count is zero\n",
990 da->da_dev);
991 return -ENOSYS;
992 }
993 da->unmap_zeroes_data = flag;
994 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
995 da->da_dev, flag);
996 return count;
997 }
998
999 /*
1000 * Note, this can only be called on unexported SE Device Object.
1001 */
1002 static ssize_t queue_depth_store(struct config_item *item,
1003 const char *page, size_t count)
1004 {
1005 struct se_dev_attrib *da = to_attrib(item);
1006 struct se_device *dev = da->da_dev;
1007 u32 val;
1008 int ret;
1009
1010 ret = kstrtou32(page, 0, &val);
1011 if (ret < 0)
1012 return ret;
1013
1014 if (dev->export_count) {
1015 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1016 " export_count is %d\n",
1017 dev, dev->export_count);
1018 return -EINVAL;
1019 }
1020 if (!val) {
1021 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1022 return -EINVAL;
1023 }
1024
1025 if (val > dev->dev_attrib.queue_depth) {
1026 if (val > dev->dev_attrib.hw_queue_depth) {
1027 pr_err("dev[%p]: Passed queue_depth:"
1028 " %u exceeds TCM/SE_Device MAX"
1029 " TCQ: %u\n", dev, val,
1030 dev->dev_attrib.hw_queue_depth);
1031 return -EINVAL;
1032 }
1033 }
1034 da->queue_depth = dev->queue_depth = val;
1035 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1036 return count;
1037 }
1038
1039 static ssize_t optimal_sectors_store(struct config_item *item,
1040 const char *page, size_t count)
1041 {
1042 struct se_dev_attrib *da = to_attrib(item);
1043 u32 val;
1044 int ret;
1045
1046 ret = kstrtou32(page, 0, &val);
1047 if (ret < 0)
1048 return ret;
1049
1050 if (da->da_dev->export_count) {
1051 pr_err("dev[%p]: Unable to change SE Device"
1052 " optimal_sectors while export_count is %d\n",
1053 da->da_dev, da->da_dev->export_count);
1054 return -EINVAL;
1055 }
1056 if (val > da->hw_max_sectors) {
1057 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1058 " greater than hw_max_sectors: %u\n",
1059 da->da_dev, val, da->hw_max_sectors);
1060 return -EINVAL;
1061 }
1062
1063 da->optimal_sectors = val;
1064 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1065 da->da_dev, val);
1066 return count;
1067 }
1068
1069 static ssize_t block_size_store(struct config_item *item,
1070 const char *page, size_t count)
1071 {
1072 struct se_dev_attrib *da = to_attrib(item);
1073 u32 val;
1074 int ret;
1075
1076 ret = kstrtou32(page, 0, &val);
1077 if (ret < 0)
1078 return ret;
1079
1080 if (da->da_dev->export_count) {
1081 pr_err("dev[%p]: Unable to change SE Device block_size"
1082 " while export_count is %d\n",
1083 da->da_dev, da->da_dev->export_count);
1084 return -EINVAL;
1085 }
1086
1087 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1088 pr_err("dev[%p]: Illegal value for block_device: %u"
1089 " for SE device, must be 512, 1024, 2048 or 4096\n",
1090 da->da_dev, val);
1091 return -EINVAL;
1092 }
1093
1094 da->block_size = val;
1095 if (da->max_bytes_per_io)
1096 da->hw_max_sectors = da->max_bytes_per_io / val;
1097
1098 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1099 da->da_dev, val);
1100 return count;
1101 }
1102
1103 static ssize_t alua_support_show(struct config_item *item, char *page)
1104 {
1105 struct se_dev_attrib *da = to_attrib(item);
1106 u8 flags = da->da_dev->transport->transport_flags;
1107
1108 return snprintf(page, PAGE_SIZE, "%d\n",
1109 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1110 }
1111
1112 static ssize_t pgr_support_show(struct config_item *item, char *page)
1113 {
1114 struct se_dev_attrib *da = to_attrib(item);
1115 u8 flags = da->da_dev->transport->transport_flags;
1116
1117 return snprintf(page, PAGE_SIZE, "%d\n",
1118 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1119 }
1120
1121 CONFIGFS_ATTR(, emulate_model_alias);
1122 CONFIGFS_ATTR(, emulate_dpo);
1123 CONFIGFS_ATTR(, emulate_fua_write);
1124 CONFIGFS_ATTR(, emulate_fua_read);
1125 CONFIGFS_ATTR(, emulate_write_cache);
1126 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1127 CONFIGFS_ATTR(, emulate_tas);
1128 CONFIGFS_ATTR(, emulate_tpu);
1129 CONFIGFS_ATTR(, emulate_tpws);
1130 CONFIGFS_ATTR(, emulate_caw);
1131 CONFIGFS_ATTR(, emulate_3pc);
1132 CONFIGFS_ATTR(, emulate_pr);
1133 CONFIGFS_ATTR(, pi_prot_type);
1134 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1135 CONFIGFS_ATTR_WO(, pi_prot_format);
1136 CONFIGFS_ATTR(, pi_prot_verify);
1137 CONFIGFS_ATTR(, enforce_pr_isids);
1138 CONFIGFS_ATTR(, is_nonrot);
1139 CONFIGFS_ATTR(, emulate_rest_reord);
1140 CONFIGFS_ATTR(, force_pr_aptpl);
1141 CONFIGFS_ATTR_RO(, hw_block_size);
1142 CONFIGFS_ATTR(, block_size);
1143 CONFIGFS_ATTR_RO(, hw_max_sectors);
1144 CONFIGFS_ATTR(, optimal_sectors);
1145 CONFIGFS_ATTR_RO(, hw_queue_depth);
1146 CONFIGFS_ATTR(, queue_depth);
1147 CONFIGFS_ATTR(, max_unmap_lba_count);
1148 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1149 CONFIGFS_ATTR(, unmap_granularity);
1150 CONFIGFS_ATTR(, unmap_granularity_alignment);
1151 CONFIGFS_ATTR(, unmap_zeroes_data);
1152 CONFIGFS_ATTR(, max_write_same_len);
1153 CONFIGFS_ATTR_RO(, alua_support);
1154 CONFIGFS_ATTR_RO(, pgr_support);
1155
1156 /*
1157 * dev_attrib attributes for devices using the target core SBC/SPC
1158 * interpreter. Any backend using spc_parse_cdb should be using
1159 * these.
1160 */
1161 struct configfs_attribute *sbc_attrib_attrs[] = {
1162 &attr_emulate_model_alias,
1163 &attr_emulate_dpo,
1164 &attr_emulate_fua_write,
1165 &attr_emulate_fua_read,
1166 &attr_emulate_write_cache,
1167 &attr_emulate_ua_intlck_ctrl,
1168 &attr_emulate_tas,
1169 &attr_emulate_tpu,
1170 &attr_emulate_tpws,
1171 &attr_emulate_caw,
1172 &attr_emulate_3pc,
1173 &attr_emulate_pr,
1174 &attr_pi_prot_type,
1175 &attr_hw_pi_prot_type,
1176 &attr_pi_prot_format,
1177 &attr_pi_prot_verify,
1178 &attr_enforce_pr_isids,
1179 &attr_is_nonrot,
1180 &attr_emulate_rest_reord,
1181 &attr_force_pr_aptpl,
1182 &attr_hw_block_size,
1183 &attr_block_size,
1184 &attr_hw_max_sectors,
1185 &attr_optimal_sectors,
1186 &attr_hw_queue_depth,
1187 &attr_queue_depth,
1188 &attr_max_unmap_lba_count,
1189 &attr_max_unmap_block_desc_count,
1190 &attr_unmap_granularity,
1191 &attr_unmap_granularity_alignment,
1192 &attr_unmap_zeroes_data,
1193 &attr_max_write_same_len,
1194 &attr_alua_support,
1195 &attr_pgr_support,
1196 NULL,
1197 };
1198 EXPORT_SYMBOL(sbc_attrib_attrs);
1199
1200 /*
1201 * Minimal dev_attrib attributes for devices passing through CDBs.
1202 * In this case we only provide a few read-only attributes for
1203 * backwards compatibility.
1204 */
1205 struct configfs_attribute *passthrough_attrib_attrs[] = {
1206 &attr_hw_pi_prot_type,
1207 &attr_hw_block_size,
1208 &attr_hw_max_sectors,
1209 &attr_hw_queue_depth,
1210 &attr_alua_support,
1211 &attr_pgr_support,
1212 NULL,
1213 };
1214 EXPORT_SYMBOL(passthrough_attrib_attrs);
1215
1216 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1217 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1218
1219 /* End functions for struct config_item_type tb_dev_attrib_cit */
1220
1221 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1222
1223 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1224 {
1225 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1226 }
1227
1228 /*
1229 * STANDARD and VPD page 0x83 T10 Vendor Identification
1230 */
1231 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1232 char *page)
1233 {
1234 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1235 }
1236
1237 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1238 const char *page, size_t count)
1239 {
1240 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1241 struct se_device *dev = t10_wwn->t10_dev;
1242 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1243 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1244 char *stripped = NULL;
1245 size_t len;
1246 int i;
1247
1248 len = strlcpy(buf, page, sizeof(buf));
1249 if (len < sizeof(buf)) {
1250 /* Strip any newline added from userspace. */
1251 stripped = strstrip(buf);
1252 len = strlen(stripped);
1253 }
1254 if (len > INQUIRY_VENDOR_LEN) {
1255 pr_err("Emulated T10 Vendor Identification exceeds"
1256 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1257 "\n");
1258 return -EOVERFLOW;
1259 }
1260
1261 /*
1262 * SPC 4.3.1:
1263 * ASCII data fields shall contain only ASCII printable characters (i.e.,
1264 * code values 20h to 7Eh) and may be terminated with one or more ASCII
1265 * null (00h) characters.
1266 */
1267 for (i = 0; i < len; i++) {
1268 if ((stripped[i] < 0x20) || (stripped[i] > 0x7E)) {
1269 pr_err("Emulated T10 Vendor Identification contains"
1270 " non-ASCII-printable characters\n");
1271 return -EINVAL;
1272 }
1273 }
1274
1275 /*
1276 * Check to see if any active exports exist. If they do exist, fail
1277 * here as changing this information on the fly (underneath the
1278 * initiator side OS dependent multipath code) could cause negative
1279 * effects.
1280 */
1281 if (dev->export_count) {
1282 pr_err("Unable to set T10 Vendor Identification while"
1283 " active %d exports exist\n", dev->export_count);
1284 return -EINVAL;
1285 }
1286
1287 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1288 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1289
1290 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1291 " %s\n", dev->t10_wwn.vendor);
1292
1293 return count;
1294 }
1295
1296 /*
1297 * VPD page 0x80 Unit serial
1298 */
1299 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1300 char *page)
1301 {
1302 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1303 &to_t10_wwn(item)->unit_serial[0]);
1304 }
1305
1306 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1307 const char *page, size_t count)
1308 {
1309 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1310 struct se_device *dev = t10_wwn->t10_dev;
1311 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1312
1313 /*
1314 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1315 * from the struct scsi_device level firmware, do not allow
1316 * VPD Unit Serial to be emulated.
1317 *
1318 * Note this struct scsi_device could also be emulating VPD
1319 * information from its drivers/scsi LLD. But for now we assume
1320 * it is doing 'the right thing' wrt a world wide unique
1321 * VPD Unit Serial Number that OS dependent multipath can depend on.
1322 */
1323 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1324 pr_err("Underlying SCSI device firmware provided VPD"
1325 " Unit Serial, ignoring request\n");
1326 return -EOPNOTSUPP;
1327 }
1328
1329 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1330 pr_err("Emulated VPD Unit Serial exceeds"
1331 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1332 return -EOVERFLOW;
1333 }
1334 /*
1335 * Check to see if any active $FABRIC_MOD exports exist. If they
1336 * do exist, fail here as changing this information on the fly
1337 * (underneath the initiator side OS dependent multipath code)
1338 * could cause negative effects.
1339 */
1340 if (dev->export_count) {
1341 pr_err("Unable to set VPD Unit Serial while"
1342 " active %d $FABRIC_MOD exports exist\n",
1343 dev->export_count);
1344 return -EINVAL;
1345 }
1346
1347 /*
1348 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1349 *
1350 * Also, strip any newline added from the userspace
1351 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1352 */
1353 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1354 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1355 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1356 "%s", strstrip(buf));
1357 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1358
1359 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1360 " %s\n", dev->t10_wwn.unit_serial);
1361
1362 return count;
1363 }
1364
1365 /*
1366 * VPD page 0x83 Protocol Identifier
1367 */
1368 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1369 char *page)
1370 {
1371 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1372 struct t10_vpd *vpd;
1373 unsigned char buf[VPD_TMP_BUF_SIZE];
1374 ssize_t len = 0;
1375
1376 memset(buf, 0, VPD_TMP_BUF_SIZE);
1377
1378 spin_lock(&t10_wwn->t10_vpd_lock);
1379 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1380 if (!vpd->protocol_identifier_set)
1381 continue;
1382
1383 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1384
1385 if (len + strlen(buf) >= PAGE_SIZE)
1386 break;
1387
1388 len += sprintf(page+len, "%s", buf);
1389 }
1390 spin_unlock(&t10_wwn->t10_vpd_lock);
1391
1392 return len;
1393 }
1394
1395 /*
1396 * Generic wrapper for dumping VPD identifiers by association.
1397 */
1398 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1399 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1400 char *page) \
1401 { \
1402 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1403 struct t10_vpd *vpd; \
1404 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1405 ssize_t len = 0; \
1406 \
1407 spin_lock(&t10_wwn->t10_vpd_lock); \
1408 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1409 if (vpd->association != _assoc) \
1410 continue; \
1411 \
1412 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1413 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1414 if (len + strlen(buf) >= PAGE_SIZE) \
1415 break; \
1416 len += sprintf(page+len, "%s", buf); \
1417 \
1418 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1419 transport_dump_vpd_ident_type(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(vpd, buf, VPD_TMP_BUF_SIZE); \
1426 if (len + strlen(buf) >= PAGE_SIZE) \
1427 break; \
1428 len += sprintf(page+len, "%s", buf); \
1429 } \
1430 spin_unlock(&t10_wwn->t10_vpd_lock); \
1431 \
1432 return len; \
1433 }
1434
1435 /* VPD page 0x83 Association: Logical Unit */
1436 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1437 /* VPD page 0x83 Association: Target Port */
1438 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1439 /* VPD page 0x83 Association: SCSI Target Device */
1440 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1441
1442 CONFIGFS_ATTR(target_wwn_, vendor_id);
1443 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1444 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1445 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1446 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1447 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1448
1449 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1450 &target_wwn_attr_vendor_id,
1451 &target_wwn_attr_vpd_unit_serial,
1452 &target_wwn_attr_vpd_protocol_identifier,
1453 &target_wwn_attr_vpd_assoc_logical_unit,
1454 &target_wwn_attr_vpd_assoc_target_port,
1455 &target_wwn_attr_vpd_assoc_scsi_target_device,
1456 NULL,
1457 };
1458
1459 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1460
1461 /* End functions for struct config_item_type tb_dev_wwn_cit */
1462
1463 /* Start functions for struct config_item_type tb_dev_pr_cit */
1464
1465 static struct se_device *pr_to_dev(struct config_item *item)
1466 {
1467 return container_of(to_config_group(item), struct se_device,
1468 dev_pr_group);
1469 }
1470
1471 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1472 char *page)
1473 {
1474 struct se_node_acl *se_nacl;
1475 struct t10_pr_registration *pr_reg;
1476 char i_buf[PR_REG_ISID_ID_LEN];
1477
1478 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1479
1480 pr_reg = dev->dev_pr_res_holder;
1481 if (!pr_reg)
1482 return sprintf(page, "No SPC-3 Reservation holder\n");
1483
1484 se_nacl = pr_reg->pr_reg_nacl;
1485 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1486
1487 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1488 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1489 se_nacl->initiatorname, i_buf);
1490 }
1491
1492 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1493 char *page)
1494 {
1495 struct se_node_acl *se_nacl;
1496 ssize_t len;
1497
1498 se_nacl = dev->dev_reserved_node_acl;
1499 if (se_nacl) {
1500 len = sprintf(page,
1501 "SPC-2 Reservation: %s Initiator: %s\n",
1502 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1503 se_nacl->initiatorname);
1504 } else {
1505 len = sprintf(page, "No SPC-2 Reservation holder\n");
1506 }
1507 return len;
1508 }
1509
1510 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1511 {
1512 struct se_device *dev = pr_to_dev(item);
1513 int ret;
1514
1515 if (!dev->dev_attrib.emulate_pr)
1516 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1517
1518 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1519 return sprintf(page, "Passthrough\n");
1520
1521 spin_lock(&dev->dev_reservation_lock);
1522 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1523 ret = target_core_dev_pr_show_spc2_res(dev, page);
1524 else
1525 ret = target_core_dev_pr_show_spc3_res(dev, page);
1526 spin_unlock(&dev->dev_reservation_lock);
1527 return ret;
1528 }
1529
1530 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1531 char *page)
1532 {
1533 struct se_device *dev = pr_to_dev(item);
1534 ssize_t len = 0;
1535
1536 spin_lock(&dev->dev_reservation_lock);
1537 if (!dev->dev_pr_res_holder) {
1538 len = sprintf(page, "No SPC-3 Reservation holder\n");
1539 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1540 len = sprintf(page, "SPC-3 Reservation: All Target"
1541 " Ports registration\n");
1542 } else {
1543 len = sprintf(page, "SPC-3 Reservation: Single"
1544 " Target Port registration\n");
1545 }
1546
1547 spin_unlock(&dev->dev_reservation_lock);
1548 return len;
1549 }
1550
1551 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1552 char *page)
1553 {
1554 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1555 }
1556
1557
1558 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1559 char *page)
1560 {
1561 struct se_device *dev = pr_to_dev(item);
1562 struct se_node_acl *se_nacl;
1563 struct se_portal_group *se_tpg;
1564 struct t10_pr_registration *pr_reg;
1565 const struct target_core_fabric_ops *tfo;
1566 ssize_t len = 0;
1567
1568 spin_lock(&dev->dev_reservation_lock);
1569 pr_reg = dev->dev_pr_res_holder;
1570 if (!pr_reg) {
1571 len = sprintf(page, "No SPC-3 Reservation holder\n");
1572 goto out_unlock;
1573 }
1574
1575 se_nacl = pr_reg->pr_reg_nacl;
1576 se_tpg = se_nacl->se_tpg;
1577 tfo = se_tpg->se_tpg_tfo;
1578
1579 len += sprintf(page+len, "SPC-3 Reservation: %s"
1580 " Target Node Endpoint: %s\n", tfo->fabric_name,
1581 tfo->tpg_get_wwn(se_tpg));
1582 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1583 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1584 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1585 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1586 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1587
1588 out_unlock:
1589 spin_unlock(&dev->dev_reservation_lock);
1590 return len;
1591 }
1592
1593
1594 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1595 char *page)
1596 {
1597 struct se_device *dev = pr_to_dev(item);
1598 const struct target_core_fabric_ops *tfo;
1599 struct t10_pr_registration *pr_reg;
1600 unsigned char buf[384];
1601 char i_buf[PR_REG_ISID_ID_LEN];
1602 ssize_t len = 0;
1603 int reg_count = 0;
1604
1605 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1606
1607 spin_lock(&dev->t10_pr.registration_lock);
1608 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1609 pr_reg_list) {
1610
1611 memset(buf, 0, 384);
1612 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1613 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1614 core_pr_dump_initiator_port(pr_reg, i_buf,
1615 PR_REG_ISID_ID_LEN);
1616 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1617 tfo->fabric_name,
1618 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1619 pr_reg->pr_res_generation);
1620
1621 if (len + strlen(buf) >= PAGE_SIZE)
1622 break;
1623
1624 len += sprintf(page+len, "%s", buf);
1625 reg_count++;
1626 }
1627 spin_unlock(&dev->t10_pr.registration_lock);
1628
1629 if (!reg_count)
1630 len += sprintf(page+len, "None\n");
1631
1632 return len;
1633 }
1634
1635 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1636 {
1637 struct se_device *dev = pr_to_dev(item);
1638 struct t10_pr_registration *pr_reg;
1639 ssize_t len = 0;
1640
1641 spin_lock(&dev->dev_reservation_lock);
1642 pr_reg = dev->dev_pr_res_holder;
1643 if (pr_reg) {
1644 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1645 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1646 } else {
1647 len = sprintf(page, "No SPC-3 Reservation holder\n");
1648 }
1649
1650 spin_unlock(&dev->dev_reservation_lock);
1651 return len;
1652 }
1653
1654 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1655 {
1656 struct se_device *dev = pr_to_dev(item);
1657
1658 if (!dev->dev_attrib.emulate_pr)
1659 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1660 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1661 return sprintf(page, "SPC_PASSTHROUGH\n");
1662 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1663 return sprintf(page, "SPC2_RESERVATIONS\n");
1664
1665 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1666 }
1667
1668 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1669 char *page)
1670 {
1671 struct se_device *dev = pr_to_dev(item);
1672
1673 if (!dev->dev_attrib.emulate_pr ||
1674 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1675 return 0;
1676
1677 return sprintf(page, "APTPL Bit Status: %s\n",
1678 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1679 }
1680
1681 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1682 char *page)
1683 {
1684 struct se_device *dev = pr_to_dev(item);
1685
1686 if (!dev->dev_attrib.emulate_pr ||
1687 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1688 return 0;
1689
1690 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1691 }
1692
1693 enum {
1694 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1695 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1696 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1697 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1698 };
1699
1700 static match_table_t tokens = {
1701 {Opt_initiator_fabric, "initiator_fabric=%s"},
1702 {Opt_initiator_node, "initiator_node=%s"},
1703 {Opt_initiator_sid, "initiator_sid=%s"},
1704 {Opt_sa_res_key, "sa_res_key=%s"},
1705 {Opt_res_holder, "res_holder=%d"},
1706 {Opt_res_type, "res_type=%d"},
1707 {Opt_res_scope, "res_scope=%d"},
1708 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1709 {Opt_mapped_lun, "mapped_lun=%u"},
1710 {Opt_target_fabric, "target_fabric=%s"},
1711 {Opt_target_node, "target_node=%s"},
1712 {Opt_tpgt, "tpgt=%d"},
1713 {Opt_port_rtpi, "port_rtpi=%d"},
1714 {Opt_target_lun, "target_lun=%u"},
1715 {Opt_err, NULL}
1716 };
1717
1718 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1719 const char *page, size_t count)
1720 {
1721 struct se_device *dev = pr_to_dev(item);
1722 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1723 unsigned char *t_fabric = NULL, *t_port = NULL;
1724 char *orig, *ptr, *opts;
1725 substring_t args[MAX_OPT_ARGS];
1726 unsigned long long tmp_ll;
1727 u64 sa_res_key = 0;
1728 u64 mapped_lun = 0, target_lun = 0;
1729 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1730 u16 tpgt = 0;
1731 u8 type = 0;
1732
1733 if (!dev->dev_attrib.emulate_pr ||
1734 (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1735 return count;
1736 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1737 return count;
1738
1739 if (dev->export_count) {
1740 pr_debug("Unable to process APTPL metadata while"
1741 " active fabric exports exist\n");
1742 return -EINVAL;
1743 }
1744
1745 opts = kstrdup(page, GFP_KERNEL);
1746 if (!opts)
1747 return -ENOMEM;
1748
1749 orig = opts;
1750 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1751 if (!*ptr)
1752 continue;
1753
1754 token = match_token(ptr, tokens, args);
1755 switch (token) {
1756 case Opt_initiator_fabric:
1757 i_fabric = match_strdup(args);
1758 if (!i_fabric) {
1759 ret = -ENOMEM;
1760 goto out;
1761 }
1762 break;
1763 case Opt_initiator_node:
1764 i_port = match_strdup(args);
1765 if (!i_port) {
1766 ret = -ENOMEM;
1767 goto out;
1768 }
1769 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1770 pr_err("APTPL metadata initiator_node="
1771 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1772 PR_APTPL_MAX_IPORT_LEN);
1773 ret = -EINVAL;
1774 break;
1775 }
1776 break;
1777 case Opt_initiator_sid:
1778 isid = match_strdup(args);
1779 if (!isid) {
1780 ret = -ENOMEM;
1781 goto out;
1782 }
1783 if (strlen(isid) >= PR_REG_ISID_LEN) {
1784 pr_err("APTPL metadata initiator_isid"
1785 "= exceeds PR_REG_ISID_LEN: %d\n",
1786 PR_REG_ISID_LEN);
1787 ret = -EINVAL;
1788 break;
1789 }
1790 break;
1791 case Opt_sa_res_key:
1792 ret = match_u64(args, &tmp_ll);
1793 if (ret < 0) {
1794 pr_err("kstrtoull() failed for sa_res_key=\n");
1795 goto out;
1796 }
1797 sa_res_key = (u64)tmp_ll;
1798 break;
1799 /*
1800 * PR APTPL Metadata for Reservation
1801 */
1802 case Opt_res_holder:
1803 ret = match_int(args, &arg);
1804 if (ret)
1805 goto out;
1806 res_holder = arg;
1807 break;
1808 case Opt_res_type:
1809 ret = match_int(args, &arg);
1810 if (ret)
1811 goto out;
1812 type = (u8)arg;
1813 break;
1814 case Opt_res_scope:
1815 ret = match_int(args, &arg);
1816 if (ret)
1817 goto out;
1818 break;
1819 case Opt_res_all_tg_pt:
1820 ret = match_int(args, &arg);
1821 if (ret)
1822 goto out;
1823 all_tg_pt = (int)arg;
1824 break;
1825 case Opt_mapped_lun:
1826 ret = match_u64(args, &tmp_ll);
1827 if (ret)
1828 goto out;
1829 mapped_lun = (u64)tmp_ll;
1830 break;
1831 /*
1832 * PR APTPL Metadata for Target Port
1833 */
1834 case Opt_target_fabric:
1835 t_fabric = match_strdup(args);
1836 if (!t_fabric) {
1837 ret = -ENOMEM;
1838 goto out;
1839 }
1840 break;
1841 case Opt_target_node:
1842 t_port = match_strdup(args);
1843 if (!t_port) {
1844 ret = -ENOMEM;
1845 goto out;
1846 }
1847 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1848 pr_err("APTPL metadata target_node="
1849 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1850 PR_APTPL_MAX_TPORT_LEN);
1851 ret = -EINVAL;
1852 break;
1853 }
1854 break;
1855 case Opt_tpgt:
1856 ret = match_int(args, &arg);
1857 if (ret)
1858 goto out;
1859 tpgt = (u16)arg;
1860 break;
1861 case Opt_port_rtpi:
1862 ret = match_int(args, &arg);
1863 if (ret)
1864 goto out;
1865 break;
1866 case Opt_target_lun:
1867 ret = match_u64(args, &tmp_ll);
1868 if (ret)
1869 goto out;
1870 target_lun = (u64)tmp_ll;
1871 break;
1872 default:
1873 break;
1874 }
1875 }
1876
1877 if (!i_port || !t_port || !sa_res_key) {
1878 pr_err("Illegal parameters for APTPL registration\n");
1879 ret = -EINVAL;
1880 goto out;
1881 }
1882
1883 if (res_holder && !(type)) {
1884 pr_err("Illegal PR type: 0x%02x for reservation"
1885 " holder\n", type);
1886 ret = -EINVAL;
1887 goto out;
1888 }
1889
1890 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1891 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1892 res_holder, all_tg_pt, type);
1893 out:
1894 kfree(i_fabric);
1895 kfree(i_port);
1896 kfree(isid);
1897 kfree(t_fabric);
1898 kfree(t_port);
1899 kfree(orig);
1900 return (ret == 0) ? count : ret;
1901 }
1902
1903
1904 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1905 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1906 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1907 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1908 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1909 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1910 CONFIGFS_ATTR_RO(target_pr_, res_type);
1911 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1912 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1913
1914 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1915 &target_pr_attr_res_holder,
1916 &target_pr_attr_res_pr_all_tgt_pts,
1917 &target_pr_attr_res_pr_generation,
1918 &target_pr_attr_res_pr_holder_tg_port,
1919 &target_pr_attr_res_pr_registered_i_pts,
1920 &target_pr_attr_res_pr_type,
1921 &target_pr_attr_res_type,
1922 &target_pr_attr_res_aptpl_active,
1923 &target_pr_attr_res_aptpl_metadata,
1924 NULL,
1925 };
1926
1927 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1928
1929 /* End functions for struct config_item_type tb_dev_pr_cit */
1930
1931 /* Start functions for struct config_item_type tb_dev_cit */
1932
1933 static inline struct se_device *to_device(struct config_item *item)
1934 {
1935 return container_of(to_config_group(item), struct se_device, dev_group);
1936 }
1937
1938 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1939 {
1940 struct se_device *dev = to_device(item);
1941 int bl = 0;
1942 ssize_t read_bytes = 0;
1943
1944 transport_dump_dev_state(dev, page, &bl);
1945 read_bytes += bl;
1946 read_bytes += dev->transport->show_configfs_dev_params(dev,
1947 page+read_bytes);
1948 return read_bytes;
1949 }
1950
1951 static ssize_t target_dev_control_store(struct config_item *item,
1952 const char *page, size_t count)
1953 {
1954 struct se_device *dev = to_device(item);
1955
1956 return dev->transport->set_configfs_dev_params(dev, page, count);
1957 }
1958
1959 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1960 {
1961 struct se_device *dev = to_device(item);
1962
1963 if (!(dev->dev_flags & DF_USING_ALIAS))
1964 return 0;
1965
1966 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1967 }
1968
1969 static ssize_t target_dev_alias_store(struct config_item *item,
1970 const char *page, size_t count)
1971 {
1972 struct se_device *dev = to_device(item);
1973 struct se_hba *hba = dev->se_hba;
1974 ssize_t read_bytes;
1975
1976 if (count > (SE_DEV_ALIAS_LEN-1)) {
1977 pr_err("alias count: %d exceeds"
1978 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1979 SE_DEV_ALIAS_LEN-1);
1980 return -EINVAL;
1981 }
1982
1983 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1984 if (!read_bytes)
1985 return -EINVAL;
1986 if (dev->dev_alias[read_bytes - 1] == '\n')
1987 dev->dev_alias[read_bytes - 1] = '\0';
1988
1989 dev->dev_flags |= DF_USING_ALIAS;
1990
1991 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1992 config_item_name(&hba->hba_group.cg_item),
1993 config_item_name(&dev->dev_group.cg_item),
1994 dev->dev_alias);
1995
1996 return read_bytes;
1997 }
1998
1999 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2000 {
2001 struct se_device *dev = to_device(item);
2002
2003 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2004 return 0;
2005
2006 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2007 }
2008
2009 static ssize_t target_dev_udev_path_store(struct config_item *item,
2010 const char *page, size_t count)
2011 {
2012 struct se_device *dev = to_device(item);
2013 struct se_hba *hba = dev->se_hba;
2014 ssize_t read_bytes;
2015
2016 if (count > (SE_UDEV_PATH_LEN-1)) {
2017 pr_err("udev_path count: %d exceeds"
2018 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2019 SE_UDEV_PATH_LEN-1);
2020 return -EINVAL;
2021 }
2022
2023 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2024 "%s", page);
2025 if (!read_bytes)
2026 return -EINVAL;
2027 if (dev->udev_path[read_bytes - 1] == '\n')
2028 dev->udev_path[read_bytes - 1] = '\0';
2029
2030 dev->dev_flags |= DF_USING_UDEV_PATH;
2031
2032 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2033 config_item_name(&hba->hba_group.cg_item),
2034 config_item_name(&dev->dev_group.cg_item),
2035 dev->udev_path);
2036
2037 return read_bytes;
2038 }
2039
2040 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2041 {
2042 struct se_device *dev = to_device(item);
2043
2044 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2045 }
2046
2047 static ssize_t target_dev_enable_store(struct config_item *item,
2048 const char *page, size_t count)
2049 {
2050 struct se_device *dev = to_device(item);
2051 char *ptr;
2052 int ret;
2053
2054 ptr = strstr(page, "1");
2055 if (!ptr) {
2056 pr_err("For dev_enable ops, only valid value"
2057 " is \"1\"\n");
2058 return -EINVAL;
2059 }
2060
2061 ret = target_configure_device(dev);
2062 if (ret)
2063 return ret;
2064 return count;
2065 }
2066
2067 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2068 {
2069 struct se_device *dev = to_device(item);
2070 struct config_item *lu_ci;
2071 struct t10_alua_lu_gp *lu_gp;
2072 struct t10_alua_lu_gp_member *lu_gp_mem;
2073 ssize_t len = 0;
2074
2075 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2076 if (!lu_gp_mem)
2077 return 0;
2078
2079 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2080 lu_gp = lu_gp_mem->lu_gp;
2081 if (lu_gp) {
2082 lu_ci = &lu_gp->lu_gp_group.cg_item;
2083 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2084 config_item_name(lu_ci), lu_gp->lu_gp_id);
2085 }
2086 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2087
2088 return len;
2089 }
2090
2091 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2092 const char *page, size_t count)
2093 {
2094 struct se_device *dev = to_device(item);
2095 struct se_hba *hba = dev->se_hba;
2096 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2097 struct t10_alua_lu_gp_member *lu_gp_mem;
2098 unsigned char buf[LU_GROUP_NAME_BUF];
2099 int move = 0;
2100
2101 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2102 if (!lu_gp_mem)
2103 return count;
2104
2105 if (count > LU_GROUP_NAME_BUF) {
2106 pr_err("ALUA LU Group Alias too large!\n");
2107 return -EINVAL;
2108 }
2109 memset(buf, 0, LU_GROUP_NAME_BUF);
2110 memcpy(buf, page, count);
2111 /*
2112 * Any ALUA logical unit alias besides "NULL" means we will be
2113 * making a new group association.
2114 */
2115 if (strcmp(strstrip(buf), "NULL")) {
2116 /*
2117 * core_alua_get_lu_gp_by_name() will increment reference to
2118 * struct t10_alua_lu_gp. This reference is released with
2119 * core_alua_get_lu_gp_by_name below().
2120 */
2121 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2122 if (!lu_gp_new)
2123 return -ENODEV;
2124 }
2125
2126 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2127 lu_gp = lu_gp_mem->lu_gp;
2128 if (lu_gp) {
2129 /*
2130 * Clearing an existing lu_gp association, and replacing
2131 * with NULL
2132 */
2133 if (!lu_gp_new) {
2134 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2135 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2136 " %hu\n",
2137 config_item_name(&hba->hba_group.cg_item),
2138 config_item_name(&dev->dev_group.cg_item),
2139 config_item_name(&lu_gp->lu_gp_group.cg_item),
2140 lu_gp->lu_gp_id);
2141
2142 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2143 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2144
2145 return count;
2146 }
2147 /*
2148 * Removing existing association of lu_gp_mem with lu_gp
2149 */
2150 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2151 move = 1;
2152 }
2153 /*
2154 * Associate lu_gp_mem with lu_gp_new.
2155 */
2156 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2157 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2158
2159 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2160 " core/alua/lu_gps/%s, ID: %hu\n",
2161 (move) ? "Moving" : "Adding",
2162 config_item_name(&hba->hba_group.cg_item),
2163 config_item_name(&dev->dev_group.cg_item),
2164 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2165 lu_gp_new->lu_gp_id);
2166
2167 core_alua_put_lu_gp_from_name(lu_gp_new);
2168 return count;
2169 }
2170
2171 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2172 {
2173 struct se_device *dev = to_device(item);
2174 struct t10_alua_lba_map *map;
2175 struct t10_alua_lba_map_member *mem;
2176 char *b = page;
2177 int bl = 0;
2178 char state;
2179
2180 spin_lock(&dev->t10_alua.lba_map_lock);
2181 if (!list_empty(&dev->t10_alua.lba_map_list))
2182 bl += sprintf(b + bl, "%u %u\n",
2183 dev->t10_alua.lba_map_segment_size,
2184 dev->t10_alua.lba_map_segment_multiplier);
2185 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2186 bl += sprintf(b + bl, "%llu %llu",
2187 map->lba_map_first_lba, map->lba_map_last_lba);
2188 list_for_each_entry(mem, &map->lba_map_mem_list,
2189 lba_map_mem_list) {
2190 switch (mem->lba_map_mem_alua_state) {
2191 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2192 state = 'O';
2193 break;
2194 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2195 state = 'A';
2196 break;
2197 case ALUA_ACCESS_STATE_STANDBY:
2198 state = 'S';
2199 break;
2200 case ALUA_ACCESS_STATE_UNAVAILABLE:
2201 state = 'U';
2202 break;
2203 default:
2204 state = '.';
2205 break;
2206 }
2207 bl += sprintf(b + bl, " %d:%c",
2208 mem->lba_map_mem_alua_pg_id, state);
2209 }
2210 bl += sprintf(b + bl, "\n");
2211 }
2212 spin_unlock(&dev->t10_alua.lba_map_lock);
2213 return bl;
2214 }
2215
2216 static ssize_t target_dev_lba_map_store(struct config_item *item,
2217 const char *page, size_t count)
2218 {
2219 struct se_device *dev = to_device(item);
2220 struct t10_alua_lba_map *lba_map = NULL;
2221 struct list_head lba_list;
2222 char *map_entries, *orig, *ptr;
2223 char state;
2224 int pg_num = -1, pg;
2225 int ret = 0, num = 0, pg_id, alua_state;
2226 unsigned long start_lba = -1, end_lba = -1;
2227 unsigned long segment_size = -1, segment_mult = -1;
2228
2229 orig = map_entries = kstrdup(page, GFP_KERNEL);
2230 if (!map_entries)
2231 return -ENOMEM;
2232
2233 INIT_LIST_HEAD(&lba_list);
2234 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2235 if (!*ptr)
2236 continue;
2237
2238 if (num == 0) {
2239 if (sscanf(ptr, "%lu %lu\n",
2240 &segment_size, &segment_mult) != 2) {
2241 pr_err("Invalid line %d\n", num);
2242 ret = -EINVAL;
2243 break;
2244 }
2245 num++;
2246 continue;
2247 }
2248 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2249 pr_err("Invalid line %d\n", num);
2250 ret = -EINVAL;
2251 break;
2252 }
2253 ptr = strchr(ptr, ' ');
2254 if (!ptr) {
2255 pr_err("Invalid line %d, missing end lba\n", num);
2256 ret = -EINVAL;
2257 break;
2258 }
2259 ptr++;
2260 ptr = strchr(ptr, ' ');
2261 if (!ptr) {
2262 pr_err("Invalid line %d, missing state definitions\n",
2263 num);
2264 ret = -EINVAL;
2265 break;
2266 }
2267 ptr++;
2268 lba_map = core_alua_allocate_lba_map(&lba_list,
2269 start_lba, end_lba);
2270 if (IS_ERR(lba_map)) {
2271 ret = PTR_ERR(lba_map);
2272 break;
2273 }
2274 pg = 0;
2275 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2276 switch (state) {
2277 case 'O':
2278 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2279 break;
2280 case 'A':
2281 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2282 break;
2283 case 'S':
2284 alua_state = ALUA_ACCESS_STATE_STANDBY;
2285 break;
2286 case 'U':
2287 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2288 break;
2289 default:
2290 pr_err("Invalid ALUA state '%c'\n", state);
2291 ret = -EINVAL;
2292 goto out;
2293 }
2294
2295 ret = core_alua_allocate_lba_map_mem(lba_map,
2296 pg_id, alua_state);
2297 if (ret) {
2298 pr_err("Invalid target descriptor %d:%c "
2299 "at line %d\n",
2300 pg_id, state, num);
2301 break;
2302 }
2303 pg++;
2304 ptr = strchr(ptr, ' ');
2305 if (ptr)
2306 ptr++;
2307 else
2308 break;
2309 }
2310 if (pg_num == -1)
2311 pg_num = pg;
2312 else if (pg != pg_num) {
2313 pr_err("Only %d from %d port groups definitions "
2314 "at line %d\n", pg, pg_num, num);
2315 ret = -EINVAL;
2316 break;
2317 }
2318 num++;
2319 }
2320 out:
2321 if (ret) {
2322 core_alua_free_lba_map(&lba_list);
2323 count = ret;
2324 } else
2325 core_alua_set_lba_map(dev, &lba_list,
2326 segment_size, segment_mult);
2327 kfree(orig);
2328 return count;
2329 }
2330
2331 CONFIGFS_ATTR_RO(target_dev_, info);
2332 CONFIGFS_ATTR_WO(target_dev_, control);
2333 CONFIGFS_ATTR(target_dev_, alias);
2334 CONFIGFS_ATTR(target_dev_, udev_path);
2335 CONFIGFS_ATTR(target_dev_, enable);
2336 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2337 CONFIGFS_ATTR(target_dev_, lba_map);
2338
2339 static struct configfs_attribute *target_core_dev_attrs[] = {
2340 &target_dev_attr_info,
2341 &target_dev_attr_control,
2342 &target_dev_attr_alias,
2343 &target_dev_attr_udev_path,
2344 &target_dev_attr_enable,
2345 &target_dev_attr_alua_lu_gp,
2346 &target_dev_attr_lba_map,
2347 NULL,
2348 };
2349
2350 static void target_core_dev_release(struct config_item *item)
2351 {
2352 struct config_group *dev_cg = to_config_group(item);
2353 struct se_device *dev =
2354 container_of(dev_cg, struct se_device, dev_group);
2355
2356 target_free_device(dev);
2357 }
2358
2359 /*
2360 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2361 * within target_fabric_port_link()
2362 */
2363 struct configfs_item_operations target_core_dev_item_ops = {
2364 .release = target_core_dev_release,
2365 };
2366
2367 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2368
2369 /* End functions for struct config_item_type tb_dev_cit */
2370
2371 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2372
2373 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2374 {
2375 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2376 lu_gp_group);
2377 }
2378
2379 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2380 {
2381 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2382
2383 if (!lu_gp->lu_gp_valid_id)
2384 return 0;
2385 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2386 }
2387
2388 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2389 const char *page, size_t count)
2390 {
2391 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2392 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2393 unsigned long lu_gp_id;
2394 int ret;
2395
2396 ret = kstrtoul(page, 0, &lu_gp_id);
2397 if (ret < 0) {
2398 pr_err("kstrtoul() returned %d for"
2399 " lu_gp_id\n", ret);
2400 return ret;
2401 }
2402 if (lu_gp_id > 0x0000ffff) {
2403 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2404 " 0x0000ffff\n", lu_gp_id);
2405 return -EINVAL;
2406 }
2407
2408 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2409 if (ret < 0)
2410 return -EINVAL;
2411
2412 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2413 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2414 config_item_name(&alua_lu_gp_cg->cg_item),
2415 lu_gp->lu_gp_id);
2416
2417 return count;
2418 }
2419
2420 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2421 {
2422 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2423 struct se_device *dev;
2424 struct se_hba *hba;
2425 struct t10_alua_lu_gp_member *lu_gp_mem;
2426 ssize_t len = 0, cur_len;
2427 unsigned char buf[LU_GROUP_NAME_BUF];
2428
2429 memset(buf, 0, LU_GROUP_NAME_BUF);
2430
2431 spin_lock(&lu_gp->lu_gp_lock);
2432 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2433 dev = lu_gp_mem->lu_gp_mem_dev;
2434 hba = dev->se_hba;
2435
2436 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2437 config_item_name(&hba->hba_group.cg_item),
2438 config_item_name(&dev->dev_group.cg_item));
2439 cur_len++; /* Extra byte for NULL terminator */
2440
2441 if ((cur_len + len) > PAGE_SIZE) {
2442 pr_warn("Ran out of lu_gp_show_attr"
2443 "_members buffer\n");
2444 break;
2445 }
2446 memcpy(page+len, buf, cur_len);
2447 len += cur_len;
2448 }
2449 spin_unlock(&lu_gp->lu_gp_lock);
2450
2451 return len;
2452 }
2453
2454 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2455 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2456
2457 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2458 &target_lu_gp_attr_lu_gp_id,
2459 &target_lu_gp_attr_members,
2460 NULL,
2461 };
2462
2463 static void target_core_alua_lu_gp_release(struct config_item *item)
2464 {
2465 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2466 struct t10_alua_lu_gp, lu_gp_group);
2467
2468 core_alua_free_lu_gp(lu_gp);
2469 }
2470
2471 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2472 .release = target_core_alua_lu_gp_release,
2473 };
2474
2475 static const struct config_item_type target_core_alua_lu_gp_cit = {
2476 .ct_item_ops = &target_core_alua_lu_gp_ops,
2477 .ct_attrs = target_core_alua_lu_gp_attrs,
2478 .ct_owner = THIS_MODULE,
2479 };
2480
2481 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2482
2483 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2484
2485 static struct config_group *target_core_alua_create_lu_gp(
2486 struct config_group *group,
2487 const char *name)
2488 {
2489 struct t10_alua_lu_gp *lu_gp;
2490 struct config_group *alua_lu_gp_cg = NULL;
2491 struct config_item *alua_lu_gp_ci = NULL;
2492
2493 lu_gp = core_alua_allocate_lu_gp(name, 0);
2494 if (IS_ERR(lu_gp))
2495 return NULL;
2496
2497 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2498 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2499
2500 config_group_init_type_name(alua_lu_gp_cg, name,
2501 &target_core_alua_lu_gp_cit);
2502
2503 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2504 " Group: core/alua/lu_gps/%s\n",
2505 config_item_name(alua_lu_gp_ci));
2506
2507 return alua_lu_gp_cg;
2508
2509 }
2510
2511 static void target_core_alua_drop_lu_gp(
2512 struct config_group *group,
2513 struct config_item *item)
2514 {
2515 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2516 struct t10_alua_lu_gp, lu_gp_group);
2517
2518 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2519 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2520 config_item_name(item), lu_gp->lu_gp_id);
2521 /*
2522 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2523 * -> target_core_alua_lu_gp_release()
2524 */
2525 config_item_put(item);
2526 }
2527
2528 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2529 .make_group = &target_core_alua_create_lu_gp,
2530 .drop_item = &target_core_alua_drop_lu_gp,
2531 };
2532
2533 static const struct config_item_type target_core_alua_lu_gps_cit = {
2534 .ct_item_ops = NULL,
2535 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2536 .ct_owner = THIS_MODULE,
2537 };
2538
2539 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2540
2541 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2542
2543 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2544 {
2545 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2546 tg_pt_gp_group);
2547 }
2548
2549 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2550 char *page)
2551 {
2552 return sprintf(page, "%d\n",
2553 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2554 }
2555
2556 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2557 const char *page, size_t count)
2558 {
2559 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2560 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2561 unsigned long tmp;
2562 int new_state, ret;
2563
2564 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2565 pr_err("Unable to do implicit ALUA on non valid"
2566 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2567 return -EINVAL;
2568 }
2569 if (!target_dev_configured(dev)) {
2570 pr_err("Unable to set alua_access_state while device is"
2571 " not configured\n");
2572 return -ENODEV;
2573 }
2574
2575 ret = kstrtoul(page, 0, &tmp);
2576 if (ret < 0) {
2577 pr_err("Unable to extract new ALUA access state from"
2578 " %s\n", page);
2579 return ret;
2580 }
2581 new_state = (int)tmp;
2582
2583 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2584 pr_err("Unable to process implicit configfs ALUA"
2585 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2586 return -EINVAL;
2587 }
2588 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2589 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2590 /* LBA DEPENDENT is only allowed with implicit ALUA */
2591 pr_err("Unable to process implicit configfs ALUA transition"
2592 " while explicit ALUA management is enabled\n");
2593 return -EINVAL;
2594 }
2595
2596 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2597 NULL, NULL, new_state, 0);
2598 return (!ret) ? count : -EINVAL;
2599 }
2600
2601 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2602 char *page)
2603 {
2604 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2605 return sprintf(page, "%s\n",
2606 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2607 }
2608
2609 static ssize_t target_tg_pt_gp_alua_access_status_store(
2610 struct config_item *item, const char *page, size_t count)
2611 {
2612 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2613 unsigned long tmp;
2614 int new_status, ret;
2615
2616 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2617 pr_err("Unable to do set ALUA access status on non"
2618 " valid tg_pt_gp ID: %hu\n",
2619 tg_pt_gp->tg_pt_gp_valid_id);
2620 return -EINVAL;
2621 }
2622
2623 ret = kstrtoul(page, 0, &tmp);
2624 if (ret < 0) {
2625 pr_err("Unable to extract new ALUA access status"
2626 " from %s\n", page);
2627 return ret;
2628 }
2629 new_status = (int)tmp;
2630
2631 if ((new_status != ALUA_STATUS_NONE) &&
2632 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2633 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2634 pr_err("Illegal ALUA access status: 0x%02x\n",
2635 new_status);
2636 return -EINVAL;
2637 }
2638
2639 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2640 return count;
2641 }
2642
2643 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2644 char *page)
2645 {
2646 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2647 }
2648
2649 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2650 const char *page, size_t count)
2651 {
2652 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2653 }
2654
2655 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2656 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2657 struct config_item *item, char *p) \
2658 { \
2659 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2660 return sprintf(p, "%d\n", \
2661 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2662 } \
2663 \
2664 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2665 struct config_item *item, const char *p, size_t c) \
2666 { \
2667 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2668 unsigned long tmp; \
2669 int ret; \
2670 \
2671 if (!t->tg_pt_gp_valid_id) { \
2672 pr_err("Unable to do set " #_name " ALUA state on non" \
2673 " valid tg_pt_gp ID: %hu\n", \
2674 t->tg_pt_gp_valid_id); \
2675 return -EINVAL; \
2676 } \
2677 \
2678 ret = kstrtoul(p, 0, &tmp); \
2679 if (ret < 0) { \
2680 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2681 return -EINVAL; \
2682 } \
2683 if (tmp > 1) { \
2684 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2685 return -EINVAL; \
2686 } \
2687 if (tmp) \
2688 t->tg_pt_gp_alua_supported_states |= _bit; \
2689 else \
2690 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2691 \
2692 return c; \
2693 }
2694
2695 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2696 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2697 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2698 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2699 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2700 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2701 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2702
2703 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2704 struct config_item *item, char *page)
2705 {
2706 return sprintf(page, "%d\n",
2707 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2708 }
2709
2710 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2711 struct config_item *item, const char *page, size_t count)
2712 {
2713 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2714 unsigned long tmp;
2715 int ret;
2716
2717 ret = kstrtoul(page, 0, &tmp);
2718 if (ret < 0) {
2719 pr_err("Unable to extract alua_write_metadata\n");
2720 return ret;
2721 }
2722
2723 if ((tmp != 0) && (tmp != 1)) {
2724 pr_err("Illegal value for alua_write_metadata:"
2725 " %lu\n", tmp);
2726 return -EINVAL;
2727 }
2728 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2729
2730 return count;
2731 }
2732
2733 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2734 char *page)
2735 {
2736 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2737 }
2738
2739 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2740 const char *page, size_t count)
2741 {
2742 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2743 count);
2744 }
2745
2746 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2747 char *page)
2748 {
2749 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2750 }
2751
2752 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2753 const char *page, size_t count)
2754 {
2755 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2756 count);
2757 }
2758
2759 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2760 struct config_item *item, char *page)
2761 {
2762 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2763 }
2764
2765 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2766 struct config_item *item, const char *page, size_t count)
2767 {
2768 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2769 count);
2770 }
2771
2772 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2773 char *page)
2774 {
2775 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2776 }
2777
2778 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2779 const char *page, size_t count)
2780 {
2781 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2782 }
2783
2784 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2785 char *page)
2786 {
2787 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2788
2789 if (!tg_pt_gp->tg_pt_gp_valid_id)
2790 return 0;
2791 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2792 }
2793
2794 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2795 const char *page, size_t count)
2796 {
2797 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2798 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2799 unsigned long tg_pt_gp_id;
2800 int ret;
2801
2802 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2803 if (ret < 0) {
2804 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2805 page);
2806 return ret;
2807 }
2808 if (tg_pt_gp_id > 0x0000ffff) {
2809 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2810 tg_pt_gp_id);
2811 return -EINVAL;
2812 }
2813
2814 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2815 if (ret < 0)
2816 return -EINVAL;
2817
2818 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2819 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2820 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2821 tg_pt_gp->tg_pt_gp_id);
2822
2823 return count;
2824 }
2825
2826 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2827 char *page)
2828 {
2829 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2830 struct se_lun *lun;
2831 ssize_t len = 0, cur_len;
2832 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2833
2834 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2835
2836 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2837 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2838 lun_tg_pt_gp_link) {
2839 struct se_portal_group *tpg = lun->lun_tpg;
2840
2841 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2842 "/%s\n", tpg->se_tpg_tfo->fabric_name,
2843 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2844 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2845 config_item_name(&lun->lun_group.cg_item));
2846 cur_len++; /* Extra byte for NULL terminator */
2847
2848 if ((cur_len + len) > PAGE_SIZE) {
2849 pr_warn("Ran out of lu_gp_show_attr"
2850 "_members buffer\n");
2851 break;
2852 }
2853 memcpy(page+len, buf, cur_len);
2854 len += cur_len;
2855 }
2856 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2857
2858 return len;
2859 }
2860
2861 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2862 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2863 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2864 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2865 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2866 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2867 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2868 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2869 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2870 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2871 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2872 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2873 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2874 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2875 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2876 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2877 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2878
2879 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2880 &target_tg_pt_gp_attr_alua_access_state,
2881 &target_tg_pt_gp_attr_alua_access_status,
2882 &target_tg_pt_gp_attr_alua_access_type,
2883 &target_tg_pt_gp_attr_alua_support_transitioning,
2884 &target_tg_pt_gp_attr_alua_support_offline,
2885 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2886 &target_tg_pt_gp_attr_alua_support_unavailable,
2887 &target_tg_pt_gp_attr_alua_support_standby,
2888 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2889 &target_tg_pt_gp_attr_alua_support_active_optimized,
2890 &target_tg_pt_gp_attr_alua_write_metadata,
2891 &target_tg_pt_gp_attr_nonop_delay_msecs,
2892 &target_tg_pt_gp_attr_trans_delay_msecs,
2893 &target_tg_pt_gp_attr_implicit_trans_secs,
2894 &target_tg_pt_gp_attr_preferred,
2895 &target_tg_pt_gp_attr_tg_pt_gp_id,
2896 &target_tg_pt_gp_attr_members,
2897 NULL,
2898 };
2899
2900 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2901 {
2902 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2903 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2904
2905 core_alua_free_tg_pt_gp(tg_pt_gp);
2906 }
2907
2908 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2909 .release = target_core_alua_tg_pt_gp_release,
2910 };
2911
2912 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
2913 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2914 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2915 .ct_owner = THIS_MODULE,
2916 };
2917
2918 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2919
2920 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2921
2922 static struct config_group *target_core_alua_create_tg_pt_gp(
2923 struct config_group *group,
2924 const char *name)
2925 {
2926 struct t10_alua *alua = container_of(group, struct t10_alua,
2927 alua_tg_pt_gps_group);
2928 struct t10_alua_tg_pt_gp *tg_pt_gp;
2929 struct config_group *alua_tg_pt_gp_cg = NULL;
2930 struct config_item *alua_tg_pt_gp_ci = NULL;
2931
2932 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2933 if (!tg_pt_gp)
2934 return NULL;
2935
2936 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2937 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2938
2939 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2940 &target_core_alua_tg_pt_gp_cit);
2941
2942 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2943 " Group: alua/tg_pt_gps/%s\n",
2944 config_item_name(alua_tg_pt_gp_ci));
2945
2946 return alua_tg_pt_gp_cg;
2947 }
2948
2949 static void target_core_alua_drop_tg_pt_gp(
2950 struct config_group *group,
2951 struct config_item *item)
2952 {
2953 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2954 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2955
2956 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2957 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2958 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2959 /*
2960 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2961 * -> target_core_alua_tg_pt_gp_release().
2962 */
2963 config_item_put(item);
2964 }
2965
2966 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2967 .make_group = &target_core_alua_create_tg_pt_gp,
2968 .drop_item = &target_core_alua_drop_tg_pt_gp,
2969 };
2970
2971 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2972
2973 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2974
2975 /* Start functions for struct config_item_type target_core_alua_cit */
2976
2977 /*
2978 * target_core_alua_cit is a ConfigFS group that lives under
2979 * /sys/kernel/config/target/core/alua. There are default groups
2980 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2981 * target_core_alua_cit in target_core_init_configfs() below.
2982 */
2983 static const struct config_item_type target_core_alua_cit = {
2984 .ct_item_ops = NULL,
2985 .ct_attrs = NULL,
2986 .ct_owner = THIS_MODULE,
2987 };
2988
2989 /* End functions for struct config_item_type target_core_alua_cit */
2990
2991 /* Start functions for struct config_item_type tb_dev_stat_cit */
2992
2993 static struct config_group *target_core_stat_mkdir(
2994 struct config_group *group,
2995 const char *name)
2996 {
2997 return ERR_PTR(-ENOSYS);
2998 }
2999
3000 static void target_core_stat_rmdir(
3001 struct config_group *group,
3002 struct config_item *item)
3003 {
3004 return;
3005 }
3006
3007 static struct configfs_group_operations target_core_stat_group_ops = {
3008 .make_group = &target_core_stat_mkdir,
3009 .drop_item = &target_core_stat_rmdir,
3010 };
3011
3012 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3013
3014 /* End functions for struct config_item_type tb_dev_stat_cit */
3015
3016 /* Start functions for struct config_item_type target_core_hba_cit */
3017
3018 static struct config_group *target_core_make_subdev(
3019 struct config_group *group,
3020 const char *name)
3021 {
3022 struct t10_alua_tg_pt_gp *tg_pt_gp;
3023 struct config_item *hba_ci = &group->cg_item;
3024 struct se_hba *hba = item_to_hba(hba_ci);
3025 struct target_backend *tb = hba->backend;
3026 struct se_device *dev;
3027 int errno = -ENOMEM, ret;
3028
3029 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3030 if (ret)
3031 return ERR_PTR(ret);
3032
3033 dev = target_alloc_device(hba, name);
3034 if (!dev)
3035 goto out_unlock;
3036
3037 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3038
3039 config_group_init_type_name(&dev->dev_action_group, "action",
3040 &tb->tb_dev_action_cit);
3041 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3042
3043 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3044 &tb->tb_dev_attrib_cit);
3045 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3046
3047 config_group_init_type_name(&dev->dev_pr_group, "pr",
3048 &tb->tb_dev_pr_cit);
3049 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3050
3051 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3052 &tb->tb_dev_wwn_cit);
3053 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3054 &dev->dev_group);
3055
3056 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3057 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3058 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3059 &dev->dev_group);
3060
3061 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3062 "statistics", &tb->tb_dev_stat_cit);
3063 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3064 &dev->dev_group);
3065
3066 /*
3067 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3068 */
3069 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3070 if (!tg_pt_gp)
3071 goto out_free_device;
3072 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3073
3074 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3075 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3076 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3077 &dev->t10_alua.alua_tg_pt_gps_group);
3078
3079 /*
3080 * Add core/$HBA/$DEV/statistics/ default groups
3081 */
3082 target_stat_setup_dev_default_groups(dev);
3083
3084 mutex_unlock(&hba->hba_access_mutex);
3085 return &dev->dev_group;
3086
3087 out_free_device:
3088 target_free_device(dev);
3089 out_unlock:
3090 mutex_unlock(&hba->hba_access_mutex);
3091 return ERR_PTR(errno);
3092 }
3093
3094 static void target_core_drop_subdev(
3095 struct config_group *group,
3096 struct config_item *item)
3097 {
3098 struct config_group *dev_cg = to_config_group(item);
3099 struct se_device *dev =
3100 container_of(dev_cg, struct se_device, dev_group);
3101 struct se_hba *hba;
3102
3103 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3104
3105 mutex_lock(&hba->hba_access_mutex);
3106
3107 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3108 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3109
3110 /*
3111 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3112 * directly from target_core_alua_tg_pt_gp_release().
3113 */
3114 dev->t10_alua.default_tg_pt_gp = NULL;
3115
3116 configfs_remove_default_groups(dev_cg);
3117
3118 /*
3119 * se_dev is released from target_core_dev_item_ops->release()
3120 */
3121 config_item_put(item);
3122 mutex_unlock(&hba->hba_access_mutex);
3123 }
3124
3125 static struct configfs_group_operations target_core_hba_group_ops = {
3126 .make_group = target_core_make_subdev,
3127 .drop_item = target_core_drop_subdev,
3128 };
3129
3130
3131 static inline struct se_hba *to_hba(struct config_item *item)
3132 {
3133 return container_of(to_config_group(item), struct se_hba, hba_group);
3134 }
3135
3136 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3137 {
3138 struct se_hba *hba = to_hba(item);
3139
3140 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3141 hba->hba_id, hba->backend->ops->name,
3142 TARGET_CORE_VERSION);
3143 }
3144
3145 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3146 {
3147 struct se_hba *hba = to_hba(item);
3148 int hba_mode = 0;
3149
3150 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3151 hba_mode = 1;
3152
3153 return sprintf(page, "%d\n", hba_mode);
3154 }
3155
3156 static ssize_t target_hba_mode_store(struct config_item *item,
3157 const char *page, size_t count)
3158 {
3159 struct se_hba *hba = to_hba(item);
3160 unsigned long mode_flag;
3161 int ret;
3162
3163 if (hba->backend->ops->pmode_enable_hba == NULL)
3164 return -EINVAL;
3165
3166 ret = kstrtoul(page, 0, &mode_flag);
3167 if (ret < 0) {
3168 pr_err("Unable to extract hba mode flag: %d\n", ret);
3169 return ret;
3170 }
3171
3172 if (hba->dev_count) {
3173 pr_err("Unable to set hba_mode with active devices\n");
3174 return -EINVAL;
3175 }
3176
3177 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3178 if (ret < 0)
3179 return -EINVAL;
3180 if (ret > 0)
3181 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3182 else if (ret == 0)
3183 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3184
3185 return count;
3186 }
3187
3188 CONFIGFS_ATTR_RO(target_, hba_info);
3189 CONFIGFS_ATTR(target_, hba_mode);
3190
3191 static void target_core_hba_release(struct config_item *item)
3192 {
3193 struct se_hba *hba = container_of(to_config_group(item),
3194 struct se_hba, hba_group);
3195 core_delete_hba(hba);
3196 }
3197
3198 static struct configfs_attribute *target_core_hba_attrs[] = {
3199 &target_attr_hba_info,
3200 &target_attr_hba_mode,
3201 NULL,
3202 };
3203
3204 static struct configfs_item_operations target_core_hba_item_ops = {
3205 .release = target_core_hba_release,
3206 };
3207
3208 static const struct config_item_type target_core_hba_cit = {
3209 .ct_item_ops = &target_core_hba_item_ops,
3210 .ct_group_ops = &target_core_hba_group_ops,
3211 .ct_attrs = target_core_hba_attrs,
3212 .ct_owner = THIS_MODULE,
3213 };
3214
3215 static struct config_group *target_core_call_addhbatotarget(
3216 struct config_group *group,
3217 const char *name)
3218 {
3219 char *se_plugin_str, *str, *str2;
3220 struct se_hba *hba;
3221 char buf[TARGET_CORE_NAME_MAX_LEN];
3222 unsigned long plugin_dep_id = 0;
3223 int ret;
3224
3225 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3226 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3227 pr_err("Passed *name strlen(): %d exceeds"
3228 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3229 TARGET_CORE_NAME_MAX_LEN);
3230 return ERR_PTR(-ENAMETOOLONG);
3231 }
3232 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3233
3234 str = strstr(buf, "_");
3235 if (!str) {
3236 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3237 return ERR_PTR(-EINVAL);
3238 }
3239 se_plugin_str = buf;
3240 /*
3241 * Special case for subsystem plugins that have "_" in their names.
3242 * Namely rd_direct and rd_mcp..
3243 */
3244 str2 = strstr(str+1, "_");
3245 if (str2) {
3246 *str2 = '\0'; /* Terminate for *se_plugin_str */
3247 str2++; /* Skip to start of plugin dependent ID */
3248 str = str2;
3249 } else {
3250 *str = '\0'; /* Terminate for *se_plugin_str */
3251 str++; /* Skip to start of plugin dependent ID */
3252 }
3253
3254 ret = kstrtoul(str, 0, &plugin_dep_id);
3255 if (ret < 0) {
3256 pr_err("kstrtoul() returned %d for"
3257 " plugin_dep_id\n", ret);
3258 return ERR_PTR(ret);
3259 }
3260 /*
3261 * Load up TCM subsystem plugins if they have not already been loaded.
3262 */
3263 transport_subsystem_check_init();
3264
3265 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3266 if (IS_ERR(hba))
3267 return ERR_CAST(hba);
3268
3269 config_group_init_type_name(&hba->hba_group, name,
3270 &target_core_hba_cit);
3271
3272 return &hba->hba_group;
3273 }
3274
3275 static void target_core_call_delhbafromtarget(
3276 struct config_group *group,
3277 struct config_item *item)
3278 {
3279 /*
3280 * core_delete_hba() is called from target_core_hba_item_ops->release()
3281 * -> target_core_hba_release()
3282 */
3283 config_item_put(item);
3284 }
3285
3286 static struct configfs_group_operations target_core_group_ops = {
3287 .make_group = target_core_call_addhbatotarget,
3288 .drop_item = target_core_call_delhbafromtarget,
3289 };
3290
3291 static const struct config_item_type target_core_cit = {
3292 .ct_item_ops = NULL,
3293 .ct_group_ops = &target_core_group_ops,
3294 .ct_attrs = NULL,
3295 .ct_owner = THIS_MODULE,
3296 };
3297
3298 /* Stop functions for struct config_item_type target_core_hba_cit */
3299
3300 void target_setup_backend_cits(struct target_backend *tb)
3301 {
3302 target_core_setup_dev_cit(tb);
3303 target_core_setup_dev_action_cit(tb);
3304 target_core_setup_dev_attrib_cit(tb);
3305 target_core_setup_dev_pr_cit(tb);
3306 target_core_setup_dev_wwn_cit(tb);
3307 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3308 target_core_setup_dev_stat_cit(tb);
3309 }
3310
3311 static void target_init_dbroot(void)
3312 {
3313 struct file *fp;
3314
3315 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3316 fp = filp_open(db_root_stage, O_RDONLY, 0);
3317 if (IS_ERR(fp)) {
3318 pr_err("db_root: cannot open: %s\n", db_root_stage);
3319 return;
3320 }
3321 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3322 filp_close(fp, NULL);
3323 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3324 return;
3325 }
3326 filp_close(fp, NULL);
3327
3328 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3329 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3330 }
3331
3332 static int __init target_core_init_configfs(void)
3333 {
3334 struct configfs_subsystem *subsys = &target_core_fabrics;
3335 struct t10_alua_lu_gp *lu_gp;
3336 int ret;
3337
3338 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3339 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3340 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3341
3342 config_group_init(&subsys->su_group);
3343 mutex_init(&subsys->su_mutex);
3344
3345 ret = init_se_kmem_caches();
3346 if (ret < 0)
3347 return ret;
3348 /*
3349 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3350 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3351 */
3352 config_group_init_type_name(&target_core_hbagroup, "core",
3353 &target_core_cit);
3354 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3355
3356 /*
3357 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3358 */
3359 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3360 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3361
3362 /*
3363 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3364 * groups under /sys/kernel/config/target/core/alua/
3365 */
3366 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3367 &target_core_alua_lu_gps_cit);
3368 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3369
3370 /*
3371 * Add core/alua/lu_gps/default_lu_gp
3372 */
3373 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3374 if (IS_ERR(lu_gp)) {
3375 ret = -ENOMEM;
3376 goto out_global;
3377 }
3378
3379 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3380 &target_core_alua_lu_gp_cit);
3381 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3382
3383 default_lu_gp = lu_gp;
3384
3385 /*
3386 * Register the target_core_mod subsystem with configfs.
3387 */
3388 ret = configfs_register_subsystem(subsys);
3389 if (ret < 0) {
3390 pr_err("Error %d while registering subsystem %s\n",
3391 ret, subsys->su_group.cg_item.ci_namebuf);
3392 goto out_global;
3393 }
3394 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3395 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3396 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3397 /*
3398 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3399 */
3400 ret = rd_module_init();
3401 if (ret < 0)
3402 goto out;
3403
3404 ret = core_dev_setup_virtual_lun0();
3405 if (ret < 0)
3406 goto out;
3407
3408 ret = target_xcopy_setup_pt();
3409 if (ret < 0)
3410 goto out;
3411
3412 target_init_dbroot();
3413
3414 return 0;
3415
3416 out:
3417 configfs_unregister_subsystem(subsys);
3418 core_dev_release_virtual_lun0();
3419 rd_module_exit();
3420 out_global:
3421 if (default_lu_gp) {
3422 core_alua_free_lu_gp(default_lu_gp);
3423 default_lu_gp = NULL;
3424 }
3425 release_se_kmem_caches();
3426 return ret;
3427 }
3428
3429 static void __exit target_core_exit_configfs(void)
3430 {
3431 configfs_remove_default_groups(&alua_lu_gps_group);
3432 configfs_remove_default_groups(&alua_group);
3433 configfs_remove_default_groups(&target_core_hbagroup);
3434
3435 /*
3436 * We expect subsys->su_group.default_groups to be released
3437 * by configfs subsystem provider logic..
3438 */
3439 configfs_unregister_subsystem(&target_core_fabrics);
3440
3441 core_alua_free_lu_gp(default_lu_gp);
3442 default_lu_gp = NULL;
3443
3444 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3445 " Infrastructure\n");
3446
3447 core_dev_release_virtual_lun0();
3448 rd_module_exit();
3449 target_xcopy_release_pt();
3450 release_se_kmem_caches();
3451 }
3452
3453 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3454 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3455 MODULE_LICENSE("GPL");
3456
3457 module_init(target_core_init_configfs);
3458 module_exit(target_core_exit_configfs);
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