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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / target / target_core_configfs.c
blobc40217f44b1bc53d149e8d5ea12c0e5297373800
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * Filename: target_core_configfs.c
4 *
5 * This file contains ConfigFS logic for the Generic Target Engine project.
6 *
7 * (c) Copyright 2008-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 ****************************************************************************/
14
15 #include <linux/kstrtox.h>
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <generated/utsrelease.h>
19 #include <linux/utsname.h>
20 #include <linux/init.h>
21 #include <linux/fs.h>
22 #include <linux/namei.h>
23 #include <linux/slab.h>
24 #include <linux/types.h>
25 #include <linux/delay.h>
26 #include <linux/unistd.h>
27 #include <linux/string.h>
28 #include <linux/parser.h>
29 #include <linux/syscalls.h>
30 #include <linux/configfs.h>
31 #include <linux/spinlock.h>
32
33 #include <target/target_core_base.h>
34 #include <target/target_core_backend.h>
35 #include <target/target_core_fabric.h>
36
37 #include "target_core_internal.h"
38 #include "target_core_alua.h"
39 #include "target_core_pr.h"
40 #include "target_core_rd.h"
41 #include "target_core_xcopy.h"
42
43 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
44 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
45 { \
46 struct config_item_type *cit = &tb->tb_##_name##_cit; \
47 \
48 cit->ct_item_ops = _item_ops; \
49 cit->ct_group_ops = _group_ops; \
50 cit->ct_attrs = _attrs; \
51 cit->ct_owner = tb->ops->owner; \
52 pr_debug("Setup generic %s\n", __stringify(_name)); \
53 }
54
55 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
56 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
57 { \
58 struct config_item_type *cit = &tb->tb_##_name##_cit; \
59 \
60 cit->ct_item_ops = _item_ops; \
61 cit->ct_group_ops = _group_ops; \
62 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
63 cit->ct_owner = tb->ops->owner; \
64 pr_debug("Setup generic %s\n", __stringify(_name)); \
65 }
66
67 extern struct t10_alua_lu_gp *default_lu_gp;
68
69 static LIST_HEAD(g_tf_list);
70 static DEFINE_MUTEX(g_tf_lock);
71
72 static struct config_group target_core_hbagroup;
73 static struct config_group alua_group;
74 static struct config_group alua_lu_gps_group;
75
76 static unsigned int target_devices;
77 static DEFINE_MUTEX(target_devices_lock);
78
79 static inline struct se_hba *
80 item_to_hba(struct config_item *item)
81 {
82 return container_of(to_config_group(item), struct se_hba, hba_group);
83 }
84
85 /*
86 * Attributes for /sys/kernel/config/target/
87 */
88 static ssize_t target_core_item_version_show(struct config_item *item,
89 char *page)
90 {
91 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
92 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
93 utsname()->sysname, utsname()->machine);
94 }
95
96 CONFIGFS_ATTR_RO(target_core_item_, version);
97
98 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
99 static char db_root_stage[DB_ROOT_LEN];
100
101 static ssize_t target_core_item_dbroot_show(struct config_item *item,
102 char *page)
103 {
104 return sprintf(page, "%s\n", db_root);
105 }
106
107 static ssize_t target_core_item_dbroot_store(struct config_item *item,
108 const char *page, size_t count)
109 {
110 ssize_t read_bytes;
111 struct file *fp;
112 ssize_t r = -EINVAL;
113
114 mutex_lock(&target_devices_lock);
115 if (target_devices) {
116 pr_err("db_root: cannot be changed because it's in use\n");
117 goto unlock;
118 }
119
120 if (count > (DB_ROOT_LEN - 1)) {
121 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
122 (int)count, DB_ROOT_LEN - 1);
123 goto unlock;
124 }
125
126 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
127 if (!read_bytes)
128 goto unlock;
129
130 if (db_root_stage[read_bytes - 1] == '\n')
131 db_root_stage[read_bytes - 1] = '\0';
132
133 /* validate new db root before accepting it */
134 fp = filp_open(db_root_stage, O_RDONLY, 0);
135 if (IS_ERR(fp)) {
136 pr_err("db_root: cannot open: %s\n", db_root_stage);
137 goto unlock;
138 }
139 if (!S_ISDIR(file_inode(fp)->i_mode)) {
140 filp_close(fp, NULL);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 goto unlock;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
148
149 r = read_bytes;
150
151 unlock:
152 mutex_unlock(&target_devices_lock);
153 return r;
154 }
155
156 CONFIGFS_ATTR(target_core_item_, dbroot);
157
158 static struct target_fabric_configfs *target_core_get_fabric(
159 const char *name)
160 {
161 struct target_fabric_configfs *tf;
162
163 if (!name)
164 return NULL;
165
166 mutex_lock(&g_tf_lock);
167 list_for_each_entry(tf, &g_tf_list, tf_list) {
168 const char *cmp_name = tf->tf_ops->fabric_alias;
169 if (!cmp_name)
170 cmp_name = tf->tf_ops->fabric_name;
171 if (!strcmp(cmp_name, name)) {
172 atomic_inc(&tf->tf_access_cnt);
173 mutex_unlock(&g_tf_lock);
174 return tf;
175 }
176 }
177 mutex_unlock(&g_tf_lock);
178
179 return NULL;
180 }
181
182 /*
183 * Called from struct target_core_group_ops->make_group()
184 */
185 static struct config_group *target_core_register_fabric(
186 struct config_group *group,
187 const char *name)
188 {
189 struct target_fabric_configfs *tf;
190 int ret;
191
192 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
193 " %s\n", group, name);
194
195 tf = target_core_get_fabric(name);
196 if (!tf) {
197 pr_debug("target_core_register_fabric() trying autoload for %s\n",
198 name);
199
200 /*
201 * Below are some hardcoded request_module() calls to automatically
202 * local fabric modules when the following is called:
203 *
204 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
205 *
206 * Note that this does not limit which TCM fabric module can be
207 * registered, but simply provids auto loading logic for modules with
208 * mkdir(2) system calls with known TCM fabric modules.
209 */
210
211 if (!strncmp(name, "iscsi", 5)) {
212 /*
213 * Automatically load the LIO Target fabric module when the
214 * following is called:
215 *
216 * mkdir -p $CONFIGFS/target/iscsi
217 */
218 ret = request_module("iscsi_target_mod");
219 if (ret < 0) {
220 pr_debug("request_module() failed for"
221 " iscsi_target_mod.ko: %d\n", ret);
222 return ERR_PTR(-EINVAL);
223 }
224 } else if (!strncmp(name, "loopback", 8)) {
225 /*
226 * Automatically load the tcm_loop fabric module when the
227 * following is called:
228 *
229 * mkdir -p $CONFIGFS/target/loopback
230 */
231 ret = request_module("tcm_loop");
232 if (ret < 0) {
233 pr_debug("request_module() failed for"
234 " tcm_loop.ko: %d\n", ret);
235 return ERR_PTR(-EINVAL);
236 }
237 }
238
239 tf = target_core_get_fabric(name);
240 }
241
242 if (!tf) {
243 pr_debug("target_core_get_fabric() failed for %s\n",
244 name);
245 return ERR_PTR(-EINVAL);
246 }
247 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
248 " %s\n", tf->tf_ops->fabric_name);
249 /*
250 * On a successful target_core_get_fabric() look, the returned
251 * struct target_fabric_configfs *tf will contain a usage reference.
252 */
253 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
254 &tf->tf_wwn_cit);
255
256 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
257
258 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
259 &tf->tf_discovery_cit);
260 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
261
262 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
263 config_item_name(&tf->tf_group.cg_item));
264 return &tf->tf_group;
265 }
266
267 /*
268 * Called from struct target_core_group_ops->drop_item()
269 */
270 static void target_core_deregister_fabric(
271 struct config_group *group,
272 struct config_item *item)
273 {
274 struct target_fabric_configfs *tf = container_of(
275 to_config_group(item), struct target_fabric_configfs, tf_group);
276
277 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
278 " tf list\n", config_item_name(item));
279
280 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
281 " %s\n", tf->tf_ops->fabric_name);
282 atomic_dec(&tf->tf_access_cnt);
283
284 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
285 " %s\n", config_item_name(item));
286
287 configfs_remove_default_groups(&tf->tf_group);
288 config_item_put(item);
289 }
290
291 static struct configfs_group_operations target_core_fabric_group_ops = {
292 .make_group = &target_core_register_fabric,
293 .drop_item = &target_core_deregister_fabric,
294 };
295
296 /*
297 * All item attributes appearing in /sys/kernel/target/ appear here.
298 */
299 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
300 &target_core_item_attr_version,
301 &target_core_item_attr_dbroot,
302 NULL,
303 };
304
305 /*
306 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
307 */
308 static const struct config_item_type target_core_fabrics_item = {
309 .ct_group_ops = &target_core_fabric_group_ops,
310 .ct_attrs = target_core_fabric_item_attrs,
311 .ct_owner = THIS_MODULE,
312 };
313
314 static struct configfs_subsystem target_core_fabrics = {
315 .su_group = {
316 .cg_item = {
317 .ci_namebuf = "target",
318 .ci_type = &target_core_fabrics_item,
319 },
320 },
321 };
322
323 int target_depend_item(struct config_item *item)
324 {
325 return configfs_depend_item(&target_core_fabrics, item);
326 }
327 EXPORT_SYMBOL(target_depend_item);
328
329 void target_undepend_item(struct config_item *item)
330 {
331 return configfs_undepend_item(item);
332 }
333 EXPORT_SYMBOL(target_undepend_item);
334
335 /*##############################################################################
336 // Start functions called by external Target Fabrics Modules
337 //############################################################################*/
338 static int target_disable_feature(struct se_portal_group *se_tpg)
339 {
340 return 0;
341 }
342
343 static u32 target_default_get_inst_index(struct se_portal_group *se_tpg)
344 {
345 return 1;
346 }
347
348 static u32 target_default_sess_get_index(struct se_session *se_sess)
349 {
350 return 0;
351 }
352
353 static void target_set_default_node_attributes(struct se_node_acl *se_acl)
354 {
355 }
356
357 static int target_default_get_cmd_state(struct se_cmd *se_cmd)
358 {
359 return 0;
360 }
361
362 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
363 {
364 if (tfo->fabric_alias) {
365 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
366 pr_err("Passed alias: %s exceeds "
367 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
368 return -EINVAL;
369 }
370 }
371 if (!tfo->fabric_name) {
372 pr_err("Missing tfo->fabric_name\n");
373 return -EINVAL;
374 }
375 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
376 pr_err("Passed name: %s exceeds "
377 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_wwn) {
381 pr_err("Missing tfo->tpg_get_wwn()\n");
382 return -EINVAL;
383 }
384 if (!tfo->tpg_get_tag) {
385 pr_err("Missing tfo->tpg_get_tag()\n");
386 return -EINVAL;
387 }
388 if (!tfo->release_cmd) {
389 pr_err("Missing tfo->release_cmd()\n");
390 return -EINVAL;
391 }
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
394 return -EINVAL;
395 }
396 if (!tfo->queue_data_in) {
397 pr_err("Missing tfo->queue_data_in()\n");
398 return -EINVAL;
399 }
400 if (!tfo->queue_status) {
401 pr_err("Missing tfo->queue_status()\n");
402 return -EINVAL;
403 }
404 if (!tfo->queue_tm_rsp) {
405 pr_err("Missing tfo->queue_tm_rsp()\n");
406 return -EINVAL;
407 }
408 if (!tfo->aborted_task) {
409 pr_err("Missing tfo->aborted_task()\n");
410 return -EINVAL;
411 }
412 if (!tfo->check_stop_free) {
413 pr_err("Missing tfo->check_stop_free()\n");
414 return -EINVAL;
415 }
416 /*
417 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
418 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
419 * target_core_fabric_configfs.c WWN+TPG group context code.
420 */
421 if (!tfo->fabric_make_wwn) {
422 pr_err("Missing tfo->fabric_make_wwn()\n");
423 return -EINVAL;
424 }
425 if (!tfo->fabric_drop_wwn) {
426 pr_err("Missing tfo->fabric_drop_wwn()\n");
427 return -EINVAL;
428 }
429 if (!tfo->fabric_make_tpg) {
430 pr_err("Missing tfo->fabric_make_tpg()\n");
431 return -EINVAL;
432 }
433 if (!tfo->fabric_drop_tpg) {
434 pr_err("Missing tfo->fabric_drop_tpg()\n");
435 return -EINVAL;
436 }
437
438 return 0;
439 }
440
441 static void target_set_default_ops(struct target_core_fabric_ops *tfo)
442 {
443 if (!tfo->tpg_check_demo_mode)
444 tfo->tpg_check_demo_mode = target_disable_feature;
445
446 if (!tfo->tpg_check_demo_mode_cache)
447 tfo->tpg_check_demo_mode_cache = target_disable_feature;
448
449 if (!tfo->tpg_check_demo_mode_write_protect)
450 tfo->tpg_check_demo_mode_write_protect = target_disable_feature;
451
452 if (!tfo->tpg_check_prod_mode_write_protect)
453 tfo->tpg_check_prod_mode_write_protect = target_disable_feature;
454
455 if (!tfo->tpg_get_inst_index)
456 tfo->tpg_get_inst_index = target_default_get_inst_index;
457
458 if (!tfo->sess_get_index)
459 tfo->sess_get_index = target_default_sess_get_index;
460
461 if (!tfo->set_default_node_attributes)
462 tfo->set_default_node_attributes = target_set_default_node_attributes;
463
464 if (!tfo->get_cmd_state)
465 tfo->get_cmd_state = target_default_get_cmd_state;
466 }
467
468 int target_register_template(const struct target_core_fabric_ops *fo)
469 {
470 struct target_core_fabric_ops *tfo;
471 struct target_fabric_configfs *tf;
472 int ret;
473
474 ret = target_fabric_tf_ops_check(fo);
475 if (ret)
476 return ret;
477
478 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
479 if (!tf) {
480 pr_err("%s: could not allocate memory!\n", __func__);
481 return -ENOMEM;
482 }
483 tfo = kzalloc(sizeof(struct target_core_fabric_ops), GFP_KERNEL);
484 if (!tfo) {
485 kfree(tf);
486 pr_err("%s: could not allocate memory!\n", __func__);
487 return -ENOMEM;
488 }
489 memcpy(tfo, fo, sizeof(*tfo));
490 target_set_default_ops(tfo);
491
492 INIT_LIST_HEAD(&tf->tf_list);
493 atomic_set(&tf->tf_access_cnt, 0);
494 tf->tf_ops = tfo;
495 target_fabric_setup_cits(tf);
496
497 mutex_lock(&g_tf_lock);
498 list_add_tail(&tf->tf_list, &g_tf_list);
499 mutex_unlock(&g_tf_lock);
500
501 return 0;
502 }
503 EXPORT_SYMBOL(target_register_template);
504
505 void target_unregister_template(const struct target_core_fabric_ops *fo)
506 {
507 struct target_fabric_configfs *t;
508
509 mutex_lock(&g_tf_lock);
510 list_for_each_entry(t, &g_tf_list, tf_list) {
511 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
512 BUG_ON(atomic_read(&t->tf_access_cnt));
513 list_del(&t->tf_list);
514 mutex_unlock(&g_tf_lock);
515 /*
516 * Wait for any outstanding fabric se_deve_entry->rcu_head
517 * callbacks to complete post kfree_rcu(), before allowing
518 * fabric driver unload of TFO->module to proceed.
519 */
520 rcu_barrier();
521 kfree(t->tf_tpg_base_cit.ct_attrs);
522 kfree(t->tf_ops);
523 kfree(t);
524 return;
525 }
526 }
527 mutex_unlock(&g_tf_lock);
528 }
529 EXPORT_SYMBOL(target_unregister_template);
530
531 /*##############################################################################
532 // Stop functions called by external Target Fabrics Modules
533 //############################################################################*/
534
535 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
536 {
537 return container_of(to_config_group(item), struct se_dev_attrib,
538 da_group);
539 }
540
541 /* Start functions for struct config_item_type tb_dev_attrib_cit */
542 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
543 static ssize_t _name##_show(struct config_item *item, char *page) \
544 { \
545 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
546 }
547
548 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
549 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
550 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
551 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
552 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
553 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
554 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
555 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
556 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
557 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
558 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
559 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
560 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
561 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
562 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
563 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
564 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
565 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
566 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
567 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
568 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
569 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
570 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
571 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
572 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
573 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
574 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
575 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
576 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
577 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
578 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
579 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
580 DEF_CONFIGFS_ATTRIB_SHOW(submit_type);
581
582 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
583 static ssize_t _name##_store(struct config_item *item, const char *page,\
584 size_t count) \
585 { \
586 struct se_dev_attrib *da = to_attrib(item); \
587 u32 val; \
588 int ret; \
589 \
590 ret = kstrtou32(page, 0, &val); \
591 if (ret < 0) \
592 return ret; \
593 da->_name = val; \
594 return count; \
595 }
596
597 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
598 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
599 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
600 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
601 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
602
603 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
604 static ssize_t _name##_store(struct config_item *item, const char *page, \
605 size_t count) \
606 { \
607 struct se_dev_attrib *da = to_attrib(item); \
608 bool flag; \
609 int ret; \
610 \
611 ret = kstrtobool(page, &flag); \
612 if (ret < 0) \
613 return ret; \
614 da->_name = flag; \
615 return count; \
616 }
617
618 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
619 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
620 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
621 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
622 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
623 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
624
625 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
626 static ssize_t _name##_store(struct config_item *item, const char *page,\
627 size_t count) \
628 { \
629 printk_once(KERN_WARNING \
630 "ignoring deprecated %s attribute\n", \
631 __stringify(_name)); \
632 return count; \
633 }
634
635 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
636 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
637
638 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
639 {
640 const char *configname;
641
642 configname = config_item_name(&dev->dev_group.cg_item);
643 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
644 pr_warn("dev[%p]: Backstore name '%s' is too long for "
645 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
646 configname);
647 }
648 /*
649 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
650 * here without potentially breaking existing setups, so continue to
651 * truncate one byte shorter than what can be carried in INQUIRY.
652 */
653 strscpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
654 }
655
656 static ssize_t emulate_model_alias_store(struct config_item *item,
657 const char *page, size_t count)
658 {
659 struct se_dev_attrib *da = to_attrib(item);
660 struct se_device *dev = da->da_dev;
661 bool flag;
662 int ret;
663
664 if (dev->export_count) {
665 pr_err("dev[%p]: Unable to change model alias"
666 " while export_count is %d\n",
667 dev, dev->export_count);
668 return -EINVAL;
669 }
670
671 ret = kstrtobool(page, &flag);
672 if (ret < 0)
673 return ret;
674
675 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
676 if (flag) {
677 dev_set_t10_wwn_model_alias(dev);
678 } else {
679 strscpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
680 sizeof(dev->t10_wwn.model));
681 }
682 da->emulate_model_alias = flag;
683 return count;
684 }
685
686 static ssize_t emulate_write_cache_store(struct config_item *item,
687 const char *page, size_t count)
688 {
689 struct se_dev_attrib *da = to_attrib(item);
690 bool flag;
691 int ret;
692
693 ret = kstrtobool(page, &flag);
694 if (ret < 0)
695 return ret;
696
697 if (flag && da->da_dev->transport->get_write_cache) {
698 pr_err("emulate_write_cache not supported for this device\n");
699 return -EINVAL;
700 }
701
702 da->emulate_write_cache = flag;
703 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
704 da->da_dev, flag);
705 return count;
706 }
707
708 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
709 const char *page, size_t count)
710 {
711 struct se_dev_attrib *da = to_attrib(item);
712 u32 val;
713 int ret;
714
715 ret = kstrtou32(page, 0, &val);
716 if (ret < 0)
717 return ret;
718
719 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
720 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
721 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
722 pr_err("Illegal value %d\n", val);
723 return -EINVAL;
724 }
725
726 if (da->da_dev->export_count) {
727 pr_err("dev[%p]: Unable to change SE Device"
728 " UA_INTRLCK_CTRL while export_count is %d\n",
729 da->da_dev, da->da_dev->export_count);
730 return -EINVAL;
731 }
732 da->emulate_ua_intlck_ctrl = val;
733 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
734 da->da_dev, val);
735 return count;
736 }
737
738 static ssize_t emulate_tas_store(struct config_item *item,
739 const char *page, size_t count)
740 {
741 struct se_dev_attrib *da = to_attrib(item);
742 bool flag;
743 int ret;
744
745 ret = kstrtobool(page, &flag);
746 if (ret < 0)
747 return ret;
748
749 if (da->da_dev->export_count) {
750 pr_err("dev[%p]: Unable to change SE Device TAS while"
751 " export_count is %d\n",
752 da->da_dev, da->da_dev->export_count);
753 return -EINVAL;
754 }
755 da->emulate_tas = flag;
756 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
757 da->da_dev, flag ? "Enabled" : "Disabled");
758
759 return count;
760 }
761
762 static int target_try_configure_unmap(struct se_device *dev,
763 const char *config_opt)
764 {
765 if (!dev->transport->configure_unmap) {
766 pr_err("Generic Block Discard not supported\n");
767 return -ENOSYS;
768 }
769
770 if (!target_dev_configured(dev)) {
771 pr_err("Generic Block Discard setup for %s requires device to be configured\n",
772 config_opt);
773 return -ENODEV;
774 }
775
776 if (!dev->transport->configure_unmap(dev)) {
777 pr_err("Generic Block Discard setup for %s failed\n",
778 config_opt);
779 return -ENOSYS;
780 }
781
782 return 0;
783 }
784
785 static ssize_t emulate_tpu_store(struct config_item *item,
786 const char *page, size_t count)
787 {
788 struct se_dev_attrib *da = to_attrib(item);
789 struct se_device *dev = da->da_dev;
790 bool flag;
791 int ret;
792
793 ret = kstrtobool(page, &flag);
794 if (ret < 0)
795 return ret;
796
797 /*
798 * We expect this value to be non-zero when generic Block Layer
799 * Discard supported is detected iblock_create_virtdevice().
800 */
801 if (flag && !da->max_unmap_block_desc_count) {
802 ret = target_try_configure_unmap(dev, "emulate_tpu");
803 if (ret)
804 return ret;
805 }
806
807 da->emulate_tpu = flag;
808 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
809 da->da_dev, flag);
810 return count;
811 }
812
813 static ssize_t emulate_tpws_store(struct config_item *item,
814 const char *page, size_t count)
815 {
816 struct se_dev_attrib *da = to_attrib(item);
817 struct se_device *dev = da->da_dev;
818 bool flag;
819 int ret;
820
821 ret = kstrtobool(page, &flag);
822 if (ret < 0)
823 return ret;
824
825 /*
826 * We expect this value to be non-zero when generic Block Layer
827 * Discard supported is detected iblock_create_virtdevice().
828 */
829 if (flag && !da->max_unmap_block_desc_count) {
830 ret = target_try_configure_unmap(dev, "emulate_tpws");
831 if (ret)
832 return ret;
833 }
834
835 da->emulate_tpws = flag;
836 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
837 da->da_dev, flag);
838 return count;
839 }
840
841 static ssize_t pi_prot_type_store(struct config_item *item,
842 const char *page, size_t count)
843 {
844 struct se_dev_attrib *da = to_attrib(item);
845 int old_prot = da->pi_prot_type, ret;
846 struct se_device *dev = da->da_dev;
847 u32 flag;
848
849 ret = kstrtou32(page, 0, &flag);
850 if (ret < 0)
851 return ret;
852
853 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
854 pr_err("Illegal value %d for pi_prot_type\n", flag);
855 return -EINVAL;
856 }
857 if (flag == 2) {
858 pr_err("DIF TYPE2 protection currently not supported\n");
859 return -ENOSYS;
860 }
861 if (da->hw_pi_prot_type) {
862 pr_warn("DIF protection enabled on underlying hardware,"
863 " ignoring\n");
864 return count;
865 }
866 if (!dev->transport->init_prot || !dev->transport->free_prot) {
867 /* 0 is only allowed value for non-supporting backends */
868 if (flag == 0)
869 return count;
870
871 pr_err("DIF protection 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 requires device to be configured\n");
877 return -ENODEV;
878 }
879 if (dev->export_count) {
880 pr_err("dev[%p]: Unable to change SE Device PROT type while"
881 " export_count is %d\n", dev, dev->export_count);
882 return -EINVAL;
883 }
884
885 da->pi_prot_type = flag;
886
887 if (flag && !old_prot) {
888 ret = dev->transport->init_prot(dev);
889 if (ret) {
890 da->pi_prot_type = old_prot;
891 da->pi_prot_verify = (bool) da->pi_prot_type;
892 return ret;
893 }
894
895 } else if (!flag && old_prot) {
896 dev->transport->free_prot(dev);
897 }
898
899 da->pi_prot_verify = (bool) da->pi_prot_type;
900 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
901 return count;
902 }
903
904 /* always zero, but attr needs to remain RW to avoid userspace breakage */
905 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
906 {
907 return snprintf(page, PAGE_SIZE, "0\n");
908 }
909
910 static ssize_t pi_prot_format_store(struct config_item *item,
911 const char *page, size_t count)
912 {
913 struct se_dev_attrib *da = to_attrib(item);
914 struct se_device *dev = da->da_dev;
915 bool flag;
916 int ret;
917
918 ret = kstrtobool(page, &flag);
919 if (ret < 0)
920 return ret;
921
922 if (!flag)
923 return count;
924
925 if (!dev->transport->format_prot) {
926 pr_err("DIF protection format not supported by backend %s\n",
927 dev->transport->name);
928 return -ENOSYS;
929 }
930 if (!target_dev_configured(dev)) {
931 pr_err("DIF protection format requires device to be configured\n");
932 return -ENODEV;
933 }
934 if (dev->export_count) {
935 pr_err("dev[%p]: Unable to format SE Device PROT type while"
936 " export_count is %d\n", dev, dev->export_count);
937 return -EINVAL;
938 }
939
940 ret = dev->transport->format_prot(dev);
941 if (ret)
942 return ret;
943
944 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
945 return count;
946 }
947
948 static ssize_t pi_prot_verify_store(struct config_item *item,
949 const char *page, size_t count)
950 {
951 struct se_dev_attrib *da = to_attrib(item);
952 bool flag;
953 int ret;
954
955 ret = kstrtobool(page, &flag);
956 if (ret < 0)
957 return ret;
958
959 if (!flag) {
960 da->pi_prot_verify = flag;
961 return count;
962 }
963 if (da->hw_pi_prot_type) {
964 pr_warn("DIF protection enabled on underlying hardware,"
965 " ignoring\n");
966 return count;
967 }
968 if (!da->pi_prot_type) {
969 pr_warn("DIF protection not supported by backend, ignoring\n");
970 return count;
971 }
972 da->pi_prot_verify = flag;
973
974 return count;
975 }
976
977 static ssize_t force_pr_aptpl_store(struct config_item *item,
978 const char *page, size_t count)
979 {
980 struct se_dev_attrib *da = to_attrib(item);
981 bool flag;
982 int ret;
983
984 ret = kstrtobool(page, &flag);
985 if (ret < 0)
986 return ret;
987 if (da->da_dev->export_count) {
988 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
989 " export_count is %d\n",
990 da->da_dev, da->da_dev->export_count);
991 return -EINVAL;
992 }
993
994 da->force_pr_aptpl = flag;
995 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
996 return count;
997 }
998
999 static ssize_t emulate_rest_reord_store(struct config_item *item,
1000 const char *page, size_t count)
1001 {
1002 struct se_dev_attrib *da = to_attrib(item);
1003 bool flag;
1004 int ret;
1005
1006 ret = kstrtobool(page, &flag);
1007 if (ret < 0)
1008 return ret;
1009
1010 if (flag != 0) {
1011 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
1012 " reordering not implemented\n", da->da_dev);
1013 return -ENOSYS;
1014 }
1015 da->emulate_rest_reord = flag;
1016 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
1017 da->da_dev, flag);
1018 return count;
1019 }
1020
1021 static ssize_t unmap_zeroes_data_store(struct config_item *item,
1022 const char *page, size_t count)
1023 {
1024 struct se_dev_attrib *da = to_attrib(item);
1025 struct se_device *dev = da->da_dev;
1026 bool flag;
1027 int ret;
1028
1029 ret = kstrtobool(page, &flag);
1030 if (ret < 0)
1031 return ret;
1032
1033 if (da->da_dev->export_count) {
1034 pr_err("dev[%p]: Unable to change SE Device"
1035 " unmap_zeroes_data while export_count is %d\n",
1036 da->da_dev, da->da_dev->export_count);
1037 return -EINVAL;
1038 }
1039 /*
1040 * We expect this value to be non-zero when generic Block Layer
1041 * Discard supported is detected iblock_configure_device().
1042 */
1043 if (flag && !da->max_unmap_block_desc_count) {
1044 ret = target_try_configure_unmap(dev, "unmap_zeroes_data");
1045 if (ret)
1046 return ret;
1047 }
1048 da->unmap_zeroes_data = flag;
1049 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
1050 da->da_dev, flag);
1051 return count;
1052 }
1053
1054 /*
1055 * Note, this can only be called on unexported SE Device Object.
1056 */
1057 static ssize_t queue_depth_store(struct config_item *item,
1058 const char *page, size_t count)
1059 {
1060 struct se_dev_attrib *da = to_attrib(item);
1061 struct se_device *dev = da->da_dev;
1062 u32 val;
1063 int ret;
1064
1065 ret = kstrtou32(page, 0, &val);
1066 if (ret < 0)
1067 return ret;
1068
1069 if (dev->export_count) {
1070 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1071 " export_count is %d\n",
1072 dev, dev->export_count);
1073 return -EINVAL;
1074 }
1075 if (!val) {
1076 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1077 return -EINVAL;
1078 }
1079
1080 if (val > dev->dev_attrib.queue_depth) {
1081 if (val > dev->dev_attrib.hw_queue_depth) {
1082 pr_err("dev[%p]: Passed queue_depth:"
1083 " %u exceeds TCM/SE_Device MAX"
1084 " TCQ: %u\n", dev, val,
1085 dev->dev_attrib.hw_queue_depth);
1086 return -EINVAL;
1087 }
1088 }
1089 da->queue_depth = dev->queue_depth = val;
1090 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1091 return count;
1092 }
1093
1094 static ssize_t optimal_sectors_store(struct config_item *item,
1095 const char *page, size_t count)
1096 {
1097 struct se_dev_attrib *da = to_attrib(item);
1098 u32 val;
1099 int ret;
1100
1101 ret = kstrtou32(page, 0, &val);
1102 if (ret < 0)
1103 return ret;
1104
1105 if (da->da_dev->export_count) {
1106 pr_err("dev[%p]: Unable to change SE Device"
1107 " optimal_sectors while export_count is %d\n",
1108 da->da_dev, da->da_dev->export_count);
1109 return -EINVAL;
1110 }
1111 if (val > da->hw_max_sectors) {
1112 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1113 " greater than hw_max_sectors: %u\n",
1114 da->da_dev, val, da->hw_max_sectors);
1115 return -EINVAL;
1116 }
1117
1118 da->optimal_sectors = val;
1119 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1120 da->da_dev, val);
1121 return count;
1122 }
1123
1124 static ssize_t block_size_store(struct config_item *item,
1125 const char *page, size_t count)
1126 {
1127 struct se_dev_attrib *da = to_attrib(item);
1128 u32 val;
1129 int ret;
1130
1131 ret = kstrtou32(page, 0, &val);
1132 if (ret < 0)
1133 return ret;
1134
1135 if (da->da_dev->export_count) {
1136 pr_err("dev[%p]: Unable to change SE Device block_size"
1137 " while export_count is %d\n",
1138 da->da_dev, da->da_dev->export_count);
1139 return -EINVAL;
1140 }
1141
1142 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1143 pr_err("dev[%p]: Illegal value for block_device: %u"
1144 " for SE device, must be 512, 1024, 2048 or 4096\n",
1145 da->da_dev, val);
1146 return -EINVAL;
1147 }
1148
1149 da->block_size = val;
1150
1151 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1152 da->da_dev, val);
1153 return count;
1154 }
1155
1156 static ssize_t alua_support_show(struct config_item *item, char *page)
1157 {
1158 struct se_dev_attrib *da = to_attrib(item);
1159 u8 flags = da->da_dev->transport_flags;
1160
1161 return snprintf(page, PAGE_SIZE, "%d\n",
1162 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1163 }
1164
1165 static ssize_t alua_support_store(struct config_item *item,
1166 const char *page, size_t count)
1167 {
1168 struct se_dev_attrib *da = to_attrib(item);
1169 struct se_device *dev = da->da_dev;
1170 bool flag, oldflag;
1171 int ret;
1172
1173 ret = kstrtobool(page, &flag);
1174 if (ret < 0)
1175 return ret;
1176
1177 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1178 if (flag == oldflag)
1179 return count;
1180
1181 if (!(dev->transport->transport_flags_changeable &
1182 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1183 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1184 " alua_support has fixed value\n", dev);
1185 return -ENOSYS;
1186 }
1187
1188 if (flag)
1189 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1190 else
1191 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1192 return count;
1193 }
1194
1195 static ssize_t pgr_support_show(struct config_item *item, char *page)
1196 {
1197 struct se_dev_attrib *da = to_attrib(item);
1198 u8 flags = da->da_dev->transport_flags;
1199
1200 return snprintf(page, PAGE_SIZE, "%d\n",
1201 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1202 }
1203
1204 static ssize_t pgr_support_store(struct config_item *item,
1205 const char *page, size_t count)
1206 {
1207 struct se_dev_attrib *da = to_attrib(item);
1208 struct se_device *dev = da->da_dev;
1209 bool flag, oldflag;
1210 int ret;
1211
1212 ret = kstrtobool(page, &flag);
1213 if (ret < 0)
1214 return ret;
1215
1216 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1217 if (flag == oldflag)
1218 return count;
1219
1220 if (!(dev->transport->transport_flags_changeable &
1221 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1222 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1223 " pgr_support has fixed value\n", dev);
1224 return -ENOSYS;
1225 }
1226
1227 if (flag)
1228 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1229 else
1230 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1231 return count;
1232 }
1233
1234 static ssize_t emulate_rsoc_store(struct config_item *item,
1235 const char *page, size_t count)
1236 {
1237 struct se_dev_attrib *da = to_attrib(item);
1238 bool flag;
1239 int ret;
1240
1241 ret = kstrtobool(page, &flag);
1242 if (ret < 0)
1243 return ret;
1244
1245 da->emulate_rsoc = flag;
1246 pr_debug("dev[%p]: SE Device REPORT_SUPPORTED_OPERATION_CODES_EMULATION flag: %d\n",
1247 da->da_dev, flag);
1248 return count;
1249 }
1250
1251 static ssize_t submit_type_store(struct config_item *item, const char *page,
1252 size_t count)
1253 {
1254 struct se_dev_attrib *da = to_attrib(item);
1255 int ret;
1256 u8 val;
1257
1258 ret = kstrtou8(page, 0, &val);
1259 if (ret < 0)
1260 return ret;
1261
1262 if (val > TARGET_QUEUE_SUBMIT)
1263 return -EINVAL;
1264
1265 da->submit_type = val;
1266 return count;
1267 }
1268
1269 CONFIGFS_ATTR(, emulate_model_alias);
1270 CONFIGFS_ATTR(, emulate_dpo);
1271 CONFIGFS_ATTR(, emulate_fua_write);
1272 CONFIGFS_ATTR(, emulate_fua_read);
1273 CONFIGFS_ATTR(, emulate_write_cache);
1274 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1275 CONFIGFS_ATTR(, emulate_tas);
1276 CONFIGFS_ATTR(, emulate_tpu);
1277 CONFIGFS_ATTR(, emulate_tpws);
1278 CONFIGFS_ATTR(, emulate_caw);
1279 CONFIGFS_ATTR(, emulate_3pc);
1280 CONFIGFS_ATTR(, emulate_pr);
1281 CONFIGFS_ATTR(, emulate_rsoc);
1282 CONFIGFS_ATTR(, pi_prot_type);
1283 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1284 CONFIGFS_ATTR(, pi_prot_format);
1285 CONFIGFS_ATTR(, pi_prot_verify);
1286 CONFIGFS_ATTR(, enforce_pr_isids);
1287 CONFIGFS_ATTR(, is_nonrot);
1288 CONFIGFS_ATTR(, emulate_rest_reord);
1289 CONFIGFS_ATTR(, force_pr_aptpl);
1290 CONFIGFS_ATTR_RO(, hw_block_size);
1291 CONFIGFS_ATTR(, block_size);
1292 CONFIGFS_ATTR_RO(, hw_max_sectors);
1293 CONFIGFS_ATTR(, optimal_sectors);
1294 CONFIGFS_ATTR_RO(, hw_queue_depth);
1295 CONFIGFS_ATTR(, queue_depth);
1296 CONFIGFS_ATTR(, max_unmap_lba_count);
1297 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1298 CONFIGFS_ATTR(, unmap_granularity);
1299 CONFIGFS_ATTR(, unmap_granularity_alignment);
1300 CONFIGFS_ATTR(, unmap_zeroes_data);
1301 CONFIGFS_ATTR(, max_write_same_len);
1302 CONFIGFS_ATTR(, alua_support);
1303 CONFIGFS_ATTR(, pgr_support);
1304 CONFIGFS_ATTR(, submit_type);
1305
1306 /*
1307 * dev_attrib attributes for devices using the target core SBC/SPC
1308 * interpreter. Any backend using spc_parse_cdb should be using
1309 * these.
1310 */
1311 struct configfs_attribute *sbc_attrib_attrs[] = {
1312 &attr_emulate_model_alias,
1313 &attr_emulate_dpo,
1314 &attr_emulate_fua_write,
1315 &attr_emulate_fua_read,
1316 &attr_emulate_write_cache,
1317 &attr_emulate_ua_intlck_ctrl,
1318 &attr_emulate_tas,
1319 &attr_emulate_tpu,
1320 &attr_emulate_tpws,
1321 &attr_emulate_caw,
1322 &attr_emulate_3pc,
1323 &attr_emulate_pr,
1324 &attr_pi_prot_type,
1325 &attr_hw_pi_prot_type,
1326 &attr_pi_prot_format,
1327 &attr_pi_prot_verify,
1328 &attr_enforce_pr_isids,
1329 &attr_is_nonrot,
1330 &attr_emulate_rest_reord,
1331 &attr_force_pr_aptpl,
1332 &attr_hw_block_size,
1333 &attr_block_size,
1334 &attr_hw_max_sectors,
1335 &attr_optimal_sectors,
1336 &attr_hw_queue_depth,
1337 &attr_queue_depth,
1338 &attr_max_unmap_lba_count,
1339 &attr_max_unmap_block_desc_count,
1340 &attr_unmap_granularity,
1341 &attr_unmap_granularity_alignment,
1342 &attr_unmap_zeroes_data,
1343 &attr_max_write_same_len,
1344 &attr_alua_support,
1345 &attr_pgr_support,
1346 &attr_emulate_rsoc,
1347 &attr_submit_type,
1348 NULL,
1349 };
1350 EXPORT_SYMBOL(sbc_attrib_attrs);
1351
1352 /*
1353 * Minimal dev_attrib attributes for devices passing through CDBs.
1354 * In this case we only provide a few read-only attributes for
1355 * backwards compatibility.
1356 */
1357 struct configfs_attribute *passthrough_attrib_attrs[] = {
1358 &attr_hw_pi_prot_type,
1359 &attr_hw_block_size,
1360 &attr_hw_max_sectors,
1361 &attr_hw_queue_depth,
1362 &attr_emulate_pr,
1363 &attr_alua_support,
1364 &attr_pgr_support,
1365 &attr_submit_type,
1366 NULL,
1367 };
1368 EXPORT_SYMBOL(passthrough_attrib_attrs);
1369
1370 /*
1371 * pr related dev_attrib attributes for devices passing through CDBs,
1372 * but allowing in core pr emulation.
1373 */
1374 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1375 &attr_enforce_pr_isids,
1376 &attr_force_pr_aptpl,
1377 NULL,
1378 };
1379 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1380
1381 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1382 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1383
1384 /* End functions for struct config_item_type tb_dev_attrib_cit */
1385
1386 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1387
1388 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1389 {
1390 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1391 }
1392
1393 static ssize_t target_check_inquiry_data(char *buf)
1394 {
1395 size_t len;
1396 int i;
1397
1398 len = strlen(buf);
1399
1400 /*
1401 * SPC 4.3.1:
1402 * ASCII data fields shall contain only ASCII printable characters
1403 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1404 * more ASCII null (00h) characters.
1405 */
1406 for (i = 0; i < len; i++) {
1407 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1408 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1409 return -EINVAL;
1410 }
1411 }
1412
1413 return len;
1414 }
1415
1416 /*
1417 * STANDARD and VPD page 0x83 T10 Vendor Identification
1418 */
1419 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1420 char *page)
1421 {
1422 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1423 }
1424
1425 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1426 const char *page, size_t count)
1427 {
1428 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1429 struct se_device *dev = t10_wwn->t10_dev;
1430 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1431 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1432 char *stripped = NULL;
1433 ssize_t len;
1434 ssize_t ret;
1435
1436 len = strscpy(buf, page, sizeof(buf));
1437 if (len > 0) {
1438 /* Strip any newline added from userspace. */
1439 stripped = strstrip(buf);
1440 len = strlen(stripped);
1441 }
1442 if (len < 0 || len > INQUIRY_VENDOR_LEN) {
1443 pr_err("Emulated T10 Vendor Identification exceeds"
1444 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1445 "\n");
1446 return -EOVERFLOW;
1447 }
1448
1449 ret = target_check_inquiry_data(stripped);
1450
1451 if (ret < 0)
1452 return ret;
1453
1454 /*
1455 * Check to see if any active exports exist. If they do exist, fail
1456 * here as changing this information on the fly (underneath the
1457 * initiator side OS dependent multipath code) could cause negative
1458 * effects.
1459 */
1460 if (dev->export_count) {
1461 pr_err("Unable to set T10 Vendor Identification while"
1462 " active %d exports exist\n", dev->export_count);
1463 return -EINVAL;
1464 }
1465
1466 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1467 strscpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1468
1469 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1470 " %s\n", dev->t10_wwn.vendor);
1471
1472 return count;
1473 }
1474
1475 static ssize_t target_wwn_product_id_show(struct config_item *item,
1476 char *page)
1477 {
1478 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1479 }
1480
1481 static ssize_t target_wwn_product_id_store(struct config_item *item,
1482 const char *page, size_t count)
1483 {
1484 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1485 struct se_device *dev = t10_wwn->t10_dev;
1486 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1487 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1488 char *stripped = NULL;
1489 ssize_t len;
1490 ssize_t ret;
1491
1492 len = strscpy(buf, page, sizeof(buf));
1493 if (len > 0) {
1494 /* Strip any newline added from userspace. */
1495 stripped = strstrip(buf);
1496 len = strlen(stripped);
1497 }
1498 if (len < 0 || len > INQUIRY_MODEL_LEN) {
1499 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1500 __stringify(INQUIRY_MODEL_LEN)
1501 "\n");
1502 return -EOVERFLOW;
1503 }
1504
1505 ret = target_check_inquiry_data(stripped);
1506
1507 if (ret < 0)
1508 return ret;
1509
1510 /*
1511 * Check to see if any active exports exist. If they do exist, fail
1512 * here as changing this information on the fly (underneath the
1513 * initiator side OS dependent multipath code) could cause negative
1514 * effects.
1515 */
1516 if (dev->export_count) {
1517 pr_err("Unable to set T10 Model while active %d exports exist\n",
1518 dev->export_count);
1519 return -EINVAL;
1520 }
1521
1522 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1523 strscpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1524
1525 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1526 dev->t10_wwn.model);
1527
1528 return count;
1529 }
1530
1531 static ssize_t target_wwn_revision_show(struct config_item *item,
1532 char *page)
1533 {
1534 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1535 }
1536
1537 static ssize_t target_wwn_revision_store(struct config_item *item,
1538 const char *page, size_t count)
1539 {
1540 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1541 struct se_device *dev = t10_wwn->t10_dev;
1542 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1543 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1544 char *stripped = NULL;
1545 ssize_t len;
1546 ssize_t ret;
1547
1548 len = strscpy(buf, page, sizeof(buf));
1549 if (len > 0) {
1550 /* Strip any newline added from userspace. */
1551 stripped = strstrip(buf);
1552 len = strlen(stripped);
1553 }
1554 if (len < 0 || len > INQUIRY_REVISION_LEN) {
1555 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1556 __stringify(INQUIRY_REVISION_LEN)
1557 "\n");
1558 return -EOVERFLOW;
1559 }
1560
1561 ret = target_check_inquiry_data(stripped);
1562
1563 if (ret < 0)
1564 return ret;
1565
1566 /*
1567 * Check to see if any active exports exist. If they do exist, fail
1568 * here as changing this information on the fly (underneath the
1569 * initiator side OS dependent multipath code) could cause negative
1570 * effects.
1571 */
1572 if (dev->export_count) {
1573 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1574 dev->export_count);
1575 return -EINVAL;
1576 }
1577
1578 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1579 strscpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1580
1581 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1582 dev->t10_wwn.revision);
1583
1584 return count;
1585 }
1586
1587 static ssize_t
1588 target_wwn_company_id_show(struct config_item *item,
1589 char *page)
1590 {
1591 return snprintf(page, PAGE_SIZE, "%#08x\n",
1592 to_t10_wwn(item)->company_id);
1593 }
1594
1595 static ssize_t
1596 target_wwn_company_id_store(struct config_item *item,
1597 const char *page, size_t count)
1598 {
1599 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1600 struct se_device *dev = t10_wwn->t10_dev;
1601 u32 val;
1602 int ret;
1603
1604 /*
1605 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1606 * form OUI assigned by the IEEE.
1607 */
1608 ret = kstrtou32(page, 0, &val);
1609 if (ret < 0)
1610 return ret;
1611
1612 if (val >= 0x1000000)
1613 return -EOVERFLOW;
1614
1615 /*
1616 * Check to see if any active exports exist. If they do exist, fail
1617 * here as changing this information on the fly (underneath the
1618 * initiator side OS dependent multipath code) could cause negative
1619 * effects.
1620 */
1621 if (dev->export_count) {
1622 pr_err("Unable to set Company ID while %u exports exist\n",
1623 dev->export_count);
1624 return -EINVAL;
1625 }
1626
1627 t10_wwn->company_id = val;
1628
1629 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1630 t10_wwn->company_id);
1631
1632 return count;
1633 }
1634
1635 /*
1636 * VPD page 0x80 Unit serial
1637 */
1638 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1639 char *page)
1640 {
1641 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1642 &to_t10_wwn(item)->unit_serial[0]);
1643 }
1644
1645 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1646 const char *page, size_t count)
1647 {
1648 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1649 struct se_device *dev = t10_wwn->t10_dev;
1650 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1651
1652 /*
1653 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1654 * from the struct scsi_device level firmware, do not allow
1655 * VPD Unit Serial to be emulated.
1656 *
1657 * Note this struct scsi_device could also be emulating VPD
1658 * information from its drivers/scsi LLD. But for now we assume
1659 * it is doing 'the right thing' wrt a world wide unique
1660 * VPD Unit Serial Number that OS dependent multipath can depend on.
1661 */
1662 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1663 pr_err("Underlying SCSI device firmware provided VPD"
1664 " Unit Serial, ignoring request\n");
1665 return -EOPNOTSUPP;
1666 }
1667
1668 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1669 pr_err("Emulated VPD Unit Serial exceeds"
1670 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1671 return -EOVERFLOW;
1672 }
1673 /*
1674 * Check to see if any active $FABRIC_MOD exports exist. If they
1675 * do exist, fail here as changing this information on the fly
1676 * (underneath the initiator side OS dependent multipath code)
1677 * could cause negative effects.
1678 */
1679 if (dev->export_count) {
1680 pr_err("Unable to set VPD Unit Serial while"
1681 " active %d $FABRIC_MOD exports exist\n",
1682 dev->export_count);
1683 return -EINVAL;
1684 }
1685
1686 /*
1687 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1688 *
1689 * Also, strip any newline added from the userspace
1690 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1691 */
1692 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1693 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1694 "%s", strstrip(buf));
1695 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1696
1697 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1698 " %s\n", dev->t10_wwn.unit_serial);
1699
1700 return count;
1701 }
1702
1703 /*
1704 * VPD page 0x83 Protocol Identifier
1705 */
1706 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1707 char *page)
1708 {
1709 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1710 struct t10_vpd *vpd;
1711 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1712 ssize_t len = 0;
1713
1714 spin_lock(&t10_wwn->t10_vpd_lock);
1715 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1716 if (!vpd->protocol_identifier_set)
1717 continue;
1718
1719 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1720
1721 if (len + strlen(buf) >= PAGE_SIZE)
1722 break;
1723
1724 len += sprintf(page+len, "%s", buf);
1725 }
1726 spin_unlock(&t10_wwn->t10_vpd_lock);
1727
1728 return len;
1729 }
1730
1731 /*
1732 * Generic wrapper for dumping VPD identifiers by association.
1733 */
1734 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1735 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1736 char *page) \
1737 { \
1738 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1739 struct t10_vpd *vpd; \
1740 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1741 ssize_t len = 0; \
1742 \
1743 spin_lock(&t10_wwn->t10_vpd_lock); \
1744 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1745 if (vpd->association != _assoc) \
1746 continue; \
1747 \
1748 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1749 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1750 if (len + strlen(buf) >= PAGE_SIZE) \
1751 break; \
1752 len += sprintf(page+len, "%s", buf); \
1753 \
1754 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1755 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1756 if (len + strlen(buf) >= PAGE_SIZE) \
1757 break; \
1758 len += sprintf(page+len, "%s", buf); \
1759 \
1760 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1761 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1762 if (len + strlen(buf) >= PAGE_SIZE) \
1763 break; \
1764 len += sprintf(page+len, "%s", buf); \
1765 } \
1766 spin_unlock(&t10_wwn->t10_vpd_lock); \
1767 \
1768 return len; \
1769 }
1770
1771 /* VPD page 0x83 Association: Logical Unit */
1772 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1773 /* VPD page 0x83 Association: Target Port */
1774 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1775 /* VPD page 0x83 Association: SCSI Target Device */
1776 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1777
1778 CONFIGFS_ATTR(target_wwn_, vendor_id);
1779 CONFIGFS_ATTR(target_wwn_, product_id);
1780 CONFIGFS_ATTR(target_wwn_, revision);
1781 CONFIGFS_ATTR(target_wwn_, company_id);
1782 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1783 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1784 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1785 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1786 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1787
1788 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1789 &target_wwn_attr_vendor_id,
1790 &target_wwn_attr_product_id,
1791 &target_wwn_attr_revision,
1792 &target_wwn_attr_company_id,
1793 &target_wwn_attr_vpd_unit_serial,
1794 &target_wwn_attr_vpd_protocol_identifier,
1795 &target_wwn_attr_vpd_assoc_logical_unit,
1796 &target_wwn_attr_vpd_assoc_target_port,
1797 &target_wwn_attr_vpd_assoc_scsi_target_device,
1798 NULL,
1799 };
1800
1801 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1802
1803 /* End functions for struct config_item_type tb_dev_wwn_cit */
1804
1805 /* Start functions for struct config_item_type tb_dev_pr_cit */
1806
1807 static struct se_device *pr_to_dev(struct config_item *item)
1808 {
1809 return container_of(to_config_group(item), struct se_device,
1810 dev_pr_group);
1811 }
1812
1813 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1814 char *page)
1815 {
1816 struct se_node_acl *se_nacl;
1817 struct t10_pr_registration *pr_reg;
1818 char i_buf[PR_REG_ISID_ID_LEN] = { };
1819
1820 pr_reg = dev->dev_pr_res_holder;
1821 if (!pr_reg)
1822 return sprintf(page, "No SPC-3 Reservation holder\n");
1823
1824 se_nacl = pr_reg->pr_reg_nacl;
1825 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1826
1827 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1828 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1829 se_nacl->initiatorname, i_buf);
1830 }
1831
1832 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1833 char *page)
1834 {
1835 struct se_session *sess = dev->reservation_holder;
1836 struct se_node_acl *se_nacl;
1837 ssize_t len;
1838
1839 if (sess) {
1840 se_nacl = sess->se_node_acl;
1841 len = sprintf(page,
1842 "SPC-2 Reservation: %s Initiator: %s\n",
1843 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1844 se_nacl->initiatorname);
1845 } else {
1846 len = sprintf(page, "No SPC-2 Reservation holder\n");
1847 }
1848 return len;
1849 }
1850
1851 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1852 {
1853 struct se_device *dev = pr_to_dev(item);
1854 int ret;
1855
1856 if (!dev->dev_attrib.emulate_pr)
1857 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1858
1859 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1860 return sprintf(page, "Passthrough\n");
1861
1862 spin_lock(&dev->dev_reservation_lock);
1863 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1864 ret = target_core_dev_pr_show_spc2_res(dev, page);
1865 else
1866 ret = target_core_dev_pr_show_spc3_res(dev, page);
1867 spin_unlock(&dev->dev_reservation_lock);
1868 return ret;
1869 }
1870
1871 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1872 char *page)
1873 {
1874 struct se_device *dev = pr_to_dev(item);
1875 ssize_t len = 0;
1876
1877 spin_lock(&dev->dev_reservation_lock);
1878 if (!dev->dev_pr_res_holder) {
1879 len = sprintf(page, "No SPC-3 Reservation holder\n");
1880 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1881 len = sprintf(page, "SPC-3 Reservation: All Target"
1882 " Ports registration\n");
1883 } else {
1884 len = sprintf(page, "SPC-3 Reservation: Single"
1885 " Target Port registration\n");
1886 }
1887
1888 spin_unlock(&dev->dev_reservation_lock);
1889 return len;
1890 }
1891
1892 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1893 char *page)
1894 {
1895 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1896 }
1897
1898
1899 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1900 char *page)
1901 {
1902 struct se_device *dev = pr_to_dev(item);
1903 struct se_node_acl *se_nacl;
1904 struct se_portal_group *se_tpg;
1905 struct t10_pr_registration *pr_reg;
1906 const struct target_core_fabric_ops *tfo;
1907 ssize_t len = 0;
1908
1909 spin_lock(&dev->dev_reservation_lock);
1910 pr_reg = dev->dev_pr_res_holder;
1911 if (!pr_reg) {
1912 len = sprintf(page, "No SPC-3 Reservation holder\n");
1913 goto out_unlock;
1914 }
1915
1916 se_nacl = pr_reg->pr_reg_nacl;
1917 se_tpg = se_nacl->se_tpg;
1918 tfo = se_tpg->se_tpg_tfo;
1919
1920 len += sprintf(page+len, "SPC-3 Reservation: %s"
1921 " Target Node Endpoint: %s\n", tfo->fabric_name,
1922 tfo->tpg_get_wwn(se_tpg));
1923 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1924 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1925 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1926 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1927 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1928
1929 out_unlock:
1930 spin_unlock(&dev->dev_reservation_lock);
1931 return len;
1932 }
1933
1934
1935 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1936 char *page)
1937 {
1938 struct se_device *dev = pr_to_dev(item);
1939 const struct target_core_fabric_ops *tfo;
1940 struct t10_pr_registration *pr_reg;
1941 unsigned char buf[384];
1942 char i_buf[PR_REG_ISID_ID_LEN];
1943 ssize_t len = 0;
1944 int reg_count = 0;
1945
1946 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1947
1948 spin_lock(&dev->t10_pr.registration_lock);
1949 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1950 pr_reg_list) {
1951
1952 memset(buf, 0, 384);
1953 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1954 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1955 core_pr_dump_initiator_port(pr_reg, i_buf,
1956 PR_REG_ISID_ID_LEN);
1957 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1958 tfo->fabric_name,
1959 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1960 pr_reg->pr_res_generation);
1961
1962 if (len + strlen(buf) >= PAGE_SIZE)
1963 break;
1964
1965 len += sprintf(page+len, "%s", buf);
1966 reg_count++;
1967 }
1968 spin_unlock(&dev->t10_pr.registration_lock);
1969
1970 if (!reg_count)
1971 len += sprintf(page+len, "None\n");
1972
1973 return len;
1974 }
1975
1976 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1977 {
1978 struct se_device *dev = pr_to_dev(item);
1979 struct t10_pr_registration *pr_reg;
1980 ssize_t len = 0;
1981
1982 spin_lock(&dev->dev_reservation_lock);
1983 pr_reg = dev->dev_pr_res_holder;
1984 if (pr_reg) {
1985 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1986 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1987 } else {
1988 len = sprintf(page, "No SPC-3 Reservation holder\n");
1989 }
1990
1991 spin_unlock(&dev->dev_reservation_lock);
1992 return len;
1993 }
1994
1995 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1996 {
1997 struct se_device *dev = pr_to_dev(item);
1998
1999 if (!dev->dev_attrib.emulate_pr)
2000 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
2001 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
2002 return sprintf(page, "SPC_PASSTHROUGH\n");
2003 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
2004 return sprintf(page, "SPC2_RESERVATIONS\n");
2005
2006 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
2007 }
2008
2009 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
2010 char *page)
2011 {
2012 struct se_device *dev = pr_to_dev(item);
2013
2014 if (!dev->dev_attrib.emulate_pr ||
2015 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
2016 return 0;
2017
2018 return sprintf(page, "APTPL Bit Status: %s\n",
2019 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
2020 }
2021
2022 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
2023 char *page)
2024 {
2025 struct se_device *dev = pr_to_dev(item);
2026
2027 if (!dev->dev_attrib.emulate_pr ||
2028 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
2029 return 0;
2030
2031 return sprintf(page, "Ready to process PR APTPL metadata..\n");
2032 }
2033
2034 enum {
2035 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
2036 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
2037 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
2038 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
2039 };
2040
2041 static match_table_t tokens = {
2042 {Opt_initiator_fabric, "initiator_fabric=%s"},
2043 {Opt_initiator_node, "initiator_node=%s"},
2044 {Opt_initiator_sid, "initiator_sid=%s"},
2045 {Opt_sa_res_key, "sa_res_key=%s"},
2046 {Opt_res_holder, "res_holder=%d"},
2047 {Opt_res_type, "res_type=%d"},
2048 {Opt_res_scope, "res_scope=%d"},
2049 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
2050 {Opt_mapped_lun, "mapped_lun=%u"},
2051 {Opt_target_fabric, "target_fabric=%s"},
2052 {Opt_target_node, "target_node=%s"},
2053 {Opt_tpgt, "tpgt=%d"},
2054 {Opt_port_rtpi, "port_rtpi=%d"},
2055 {Opt_target_lun, "target_lun=%u"},
2056 {Opt_err, NULL}
2057 };
2058
2059 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
2060 const char *page, size_t count)
2061 {
2062 struct se_device *dev = pr_to_dev(item);
2063 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
2064 unsigned char *t_fabric = NULL, *t_port = NULL;
2065 char *orig, *ptr, *opts;
2066 substring_t args[MAX_OPT_ARGS];
2067 unsigned long long tmp_ll;
2068 u64 sa_res_key = 0;
2069 u64 mapped_lun = 0, target_lun = 0;
2070 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
2071 u16 tpgt = 0;
2072 u8 type = 0;
2073
2074 if (!dev->dev_attrib.emulate_pr ||
2075 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
2076 return count;
2077 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
2078 return count;
2079
2080 if (dev->export_count) {
2081 pr_debug("Unable to process APTPL metadata while"
2082 " active fabric exports exist\n");
2083 return -EINVAL;
2084 }
2085
2086 opts = kstrdup(page, GFP_KERNEL);
2087 if (!opts)
2088 return -ENOMEM;
2089
2090 orig = opts;
2091 while ((ptr = strsep(&opts, ",\n")) != NULL) {
2092 if (!*ptr)
2093 continue;
2094
2095 token = match_token(ptr, tokens, args);
2096 switch (token) {
2097 case Opt_initiator_fabric:
2098 i_fabric = match_strdup(args);
2099 if (!i_fabric) {
2100 ret = -ENOMEM;
2101 goto out;
2102 }
2103 break;
2104 case Opt_initiator_node:
2105 i_port = match_strdup(args);
2106 if (!i_port) {
2107 ret = -ENOMEM;
2108 goto out;
2109 }
2110 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2111 pr_err("APTPL metadata initiator_node="
2112 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2113 PR_APTPL_MAX_IPORT_LEN);
2114 ret = -EINVAL;
2115 break;
2116 }
2117 break;
2118 case Opt_initiator_sid:
2119 isid = match_strdup(args);
2120 if (!isid) {
2121 ret = -ENOMEM;
2122 goto out;
2123 }
2124 if (strlen(isid) >= PR_REG_ISID_LEN) {
2125 pr_err("APTPL metadata initiator_isid"
2126 "= exceeds PR_REG_ISID_LEN: %d\n",
2127 PR_REG_ISID_LEN);
2128 ret = -EINVAL;
2129 break;
2130 }
2131 break;
2132 case Opt_sa_res_key:
2133 ret = match_u64(args, &tmp_ll);
2134 if (ret < 0) {
2135 pr_err("kstrtoull() failed for sa_res_key=\n");
2136 goto out;
2137 }
2138 sa_res_key = (u64)tmp_ll;
2139 break;
2140 /*
2141 * PR APTPL Metadata for Reservation
2142 */
2143 case Opt_res_holder:
2144 ret = match_int(args, &arg);
2145 if (ret)
2146 goto out;
2147 res_holder = arg;
2148 break;
2149 case Opt_res_type:
2150 ret = match_int(args, &arg);
2151 if (ret)
2152 goto out;
2153 type = (u8)arg;
2154 break;
2155 case Opt_res_scope:
2156 ret = match_int(args, &arg);
2157 if (ret)
2158 goto out;
2159 break;
2160 case Opt_res_all_tg_pt:
2161 ret = match_int(args, &arg);
2162 if (ret)
2163 goto out;
2164 all_tg_pt = (int)arg;
2165 break;
2166 case Opt_mapped_lun:
2167 ret = match_u64(args, &tmp_ll);
2168 if (ret)
2169 goto out;
2170 mapped_lun = (u64)tmp_ll;
2171 break;
2172 /*
2173 * PR APTPL Metadata for Target Port
2174 */
2175 case Opt_target_fabric:
2176 t_fabric = match_strdup(args);
2177 if (!t_fabric) {
2178 ret = -ENOMEM;
2179 goto out;
2180 }
2181 break;
2182 case Opt_target_node:
2183 t_port = match_strdup(args);
2184 if (!t_port) {
2185 ret = -ENOMEM;
2186 goto out;
2187 }
2188 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2189 pr_err("APTPL metadata target_node="
2190 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2191 PR_APTPL_MAX_TPORT_LEN);
2192 ret = -EINVAL;
2193 break;
2194 }
2195 break;
2196 case Opt_tpgt:
2197 ret = match_int(args, &arg);
2198 if (ret)
2199 goto out;
2200 tpgt = (u16)arg;
2201 break;
2202 case Opt_port_rtpi:
2203 ret = match_int(args, &arg);
2204 if (ret)
2205 goto out;
2206 break;
2207 case Opt_target_lun:
2208 ret = match_u64(args, &tmp_ll);
2209 if (ret)
2210 goto out;
2211 target_lun = (u64)tmp_ll;
2212 break;
2213 default:
2214 break;
2215 }
2216 }
2217
2218 if (!i_port || !t_port || !sa_res_key) {
2219 pr_err("Illegal parameters for APTPL registration\n");
2220 ret = -EINVAL;
2221 goto out;
2222 }
2223
2224 if (res_holder && !(type)) {
2225 pr_err("Illegal PR type: 0x%02x for reservation"
2226 " holder\n", type);
2227 ret = -EINVAL;
2228 goto out;
2229 }
2230
2231 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2232 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2233 res_holder, all_tg_pt, type);
2234 out:
2235 kfree(i_fabric);
2236 kfree(i_port);
2237 kfree(isid);
2238 kfree(t_fabric);
2239 kfree(t_port);
2240 kfree(orig);
2241 return (ret == 0) ? count : ret;
2242 }
2243
2244
2245 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2246 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2247 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2248 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2249 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2250 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2251 CONFIGFS_ATTR_RO(target_pr_, res_type);
2252 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2253 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2254
2255 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2256 &target_pr_attr_res_holder,
2257 &target_pr_attr_res_pr_all_tgt_pts,
2258 &target_pr_attr_res_pr_generation,
2259 &target_pr_attr_res_pr_holder_tg_port,
2260 &target_pr_attr_res_pr_registered_i_pts,
2261 &target_pr_attr_res_pr_type,
2262 &target_pr_attr_res_type,
2263 &target_pr_attr_res_aptpl_active,
2264 &target_pr_attr_res_aptpl_metadata,
2265 NULL,
2266 };
2267
2268 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2269
2270 /* End functions for struct config_item_type tb_dev_pr_cit */
2271
2272 /* Start functions for struct config_item_type tb_dev_cit */
2273
2274 static inline struct se_device *to_device(struct config_item *item)
2275 {
2276 return container_of(to_config_group(item), struct se_device, dev_group);
2277 }
2278
2279 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2280 {
2281 struct se_device *dev = to_device(item);
2282 int bl = 0;
2283 ssize_t read_bytes = 0;
2284
2285 transport_dump_dev_state(dev, page, &bl);
2286 read_bytes += bl;
2287 read_bytes += dev->transport->show_configfs_dev_params(dev,
2288 page+read_bytes);
2289 return read_bytes;
2290 }
2291
2292 static ssize_t target_dev_control_store(struct config_item *item,
2293 const char *page, size_t count)
2294 {
2295 struct se_device *dev = to_device(item);
2296
2297 return dev->transport->set_configfs_dev_params(dev, page, count);
2298 }
2299
2300 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2301 {
2302 struct se_device *dev = to_device(item);
2303
2304 if (!(dev->dev_flags & DF_USING_ALIAS))
2305 return 0;
2306
2307 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2308 }
2309
2310 static ssize_t target_dev_alias_store(struct config_item *item,
2311 const char *page, size_t count)
2312 {
2313 struct se_device *dev = to_device(item);
2314 struct se_hba *hba = dev->se_hba;
2315 ssize_t read_bytes;
2316
2317 if (count > (SE_DEV_ALIAS_LEN-1)) {
2318 pr_err("alias count: %d exceeds"
2319 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2320 SE_DEV_ALIAS_LEN-1);
2321 return -EINVAL;
2322 }
2323
2324 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2325 if (!read_bytes)
2326 return -EINVAL;
2327 if (dev->dev_alias[read_bytes - 1] == '\n')
2328 dev->dev_alias[read_bytes - 1] = '\0';
2329
2330 dev->dev_flags |= DF_USING_ALIAS;
2331
2332 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2333 config_item_name(&hba->hba_group.cg_item),
2334 config_item_name(&dev->dev_group.cg_item),
2335 dev->dev_alias);
2336
2337 return read_bytes;
2338 }
2339
2340 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2341 {
2342 struct se_device *dev = to_device(item);
2343
2344 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2345 return 0;
2346
2347 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2348 }
2349
2350 static ssize_t target_dev_udev_path_store(struct config_item *item,
2351 const char *page, size_t count)
2352 {
2353 struct se_device *dev = to_device(item);
2354 struct se_hba *hba = dev->se_hba;
2355 ssize_t read_bytes;
2356
2357 if (count > (SE_UDEV_PATH_LEN-1)) {
2358 pr_err("udev_path count: %d exceeds"
2359 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2360 SE_UDEV_PATH_LEN-1);
2361 return -EINVAL;
2362 }
2363
2364 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2365 "%s", page);
2366 if (!read_bytes)
2367 return -EINVAL;
2368 if (dev->udev_path[read_bytes - 1] == '\n')
2369 dev->udev_path[read_bytes - 1] = '\0';
2370
2371 dev->dev_flags |= DF_USING_UDEV_PATH;
2372
2373 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2374 config_item_name(&hba->hba_group.cg_item),
2375 config_item_name(&dev->dev_group.cg_item),
2376 dev->udev_path);
2377
2378 return read_bytes;
2379 }
2380
2381 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2382 {
2383 struct se_device *dev = to_device(item);
2384
2385 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2386 }
2387
2388 static ssize_t target_dev_enable_store(struct config_item *item,
2389 const char *page, size_t count)
2390 {
2391 struct se_device *dev = to_device(item);
2392 char *ptr;
2393 int ret;
2394
2395 ptr = strstr(page, "1");
2396 if (!ptr) {
2397 pr_err("For dev_enable ops, only valid value"
2398 " is \"1\"\n");
2399 return -EINVAL;
2400 }
2401
2402 ret = target_configure_device(dev);
2403 if (ret)
2404 return ret;
2405 return count;
2406 }
2407
2408 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2409 {
2410 struct se_device *dev = to_device(item);
2411 struct config_item *lu_ci;
2412 struct t10_alua_lu_gp *lu_gp;
2413 struct t10_alua_lu_gp_member *lu_gp_mem;
2414 ssize_t len = 0;
2415
2416 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2417 if (!lu_gp_mem)
2418 return 0;
2419
2420 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2421 lu_gp = lu_gp_mem->lu_gp;
2422 if (lu_gp) {
2423 lu_ci = &lu_gp->lu_gp_group.cg_item;
2424 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2425 config_item_name(lu_ci), lu_gp->lu_gp_id);
2426 }
2427 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2428
2429 return len;
2430 }
2431
2432 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2433 const char *page, size_t count)
2434 {
2435 struct se_device *dev = to_device(item);
2436 struct se_hba *hba = dev->se_hba;
2437 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2438 struct t10_alua_lu_gp_member *lu_gp_mem;
2439 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2440 int move = 0;
2441
2442 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2443 if (!lu_gp_mem)
2444 return count;
2445
2446 if (count > LU_GROUP_NAME_BUF) {
2447 pr_err("ALUA LU Group Alias too large!\n");
2448 return -EINVAL;
2449 }
2450 memcpy(buf, page, count);
2451 /*
2452 * Any ALUA logical unit alias besides "NULL" means we will be
2453 * making a new group association.
2454 */
2455 if (strcmp(strstrip(buf), "NULL")) {
2456 /*
2457 * core_alua_get_lu_gp_by_name() will increment reference to
2458 * struct t10_alua_lu_gp. This reference is released with
2459 * core_alua_get_lu_gp_by_name below().
2460 */
2461 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2462 if (!lu_gp_new)
2463 return -ENODEV;
2464 }
2465
2466 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2467 lu_gp = lu_gp_mem->lu_gp;
2468 if (lu_gp) {
2469 /*
2470 * Clearing an existing lu_gp association, and replacing
2471 * with NULL
2472 */
2473 if (!lu_gp_new) {
2474 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2475 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2476 " %hu\n",
2477 config_item_name(&hba->hba_group.cg_item),
2478 config_item_name(&dev->dev_group.cg_item),
2479 config_item_name(&lu_gp->lu_gp_group.cg_item),
2480 lu_gp->lu_gp_id);
2481
2482 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2483 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2484
2485 return count;
2486 }
2487 /*
2488 * Removing existing association of lu_gp_mem with lu_gp
2489 */
2490 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2491 move = 1;
2492 }
2493 /*
2494 * Associate lu_gp_mem with lu_gp_new.
2495 */
2496 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2497 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2498
2499 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2500 " core/alua/lu_gps/%s, ID: %hu\n",
2501 (move) ? "Moving" : "Adding",
2502 config_item_name(&hba->hba_group.cg_item),
2503 config_item_name(&dev->dev_group.cg_item),
2504 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2505 lu_gp_new->lu_gp_id);
2506
2507 core_alua_put_lu_gp_from_name(lu_gp_new);
2508 return count;
2509 }
2510
2511 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2512 {
2513 struct se_device *dev = to_device(item);
2514 struct t10_alua_lba_map *map;
2515 struct t10_alua_lba_map_member *mem;
2516 char *b = page;
2517 int bl = 0;
2518 char state;
2519
2520 spin_lock(&dev->t10_alua.lba_map_lock);
2521 if (!list_empty(&dev->t10_alua.lba_map_list))
2522 bl += sprintf(b + bl, "%u %u\n",
2523 dev->t10_alua.lba_map_segment_size,
2524 dev->t10_alua.lba_map_segment_multiplier);
2525 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2526 bl += sprintf(b + bl, "%llu %llu",
2527 map->lba_map_first_lba, map->lba_map_last_lba);
2528 list_for_each_entry(mem, &map->lba_map_mem_list,
2529 lba_map_mem_list) {
2530 switch (mem->lba_map_mem_alua_state) {
2531 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2532 state = 'O';
2533 break;
2534 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2535 state = 'A';
2536 break;
2537 case ALUA_ACCESS_STATE_STANDBY:
2538 state = 'S';
2539 break;
2540 case ALUA_ACCESS_STATE_UNAVAILABLE:
2541 state = 'U';
2542 break;
2543 default:
2544 state = '.';
2545 break;
2546 }
2547 bl += sprintf(b + bl, " %d:%c",
2548 mem->lba_map_mem_alua_pg_id, state);
2549 }
2550 bl += sprintf(b + bl, "\n");
2551 }
2552 spin_unlock(&dev->t10_alua.lba_map_lock);
2553 return bl;
2554 }
2555
2556 static ssize_t target_dev_lba_map_store(struct config_item *item,
2557 const char *page, size_t count)
2558 {
2559 struct se_device *dev = to_device(item);
2560 struct t10_alua_lba_map *lba_map = NULL;
2561 struct list_head lba_list;
2562 char *map_entries, *orig, *ptr;
2563 char state;
2564 int pg_num = -1, pg;
2565 int ret = 0, num = 0, pg_id, alua_state;
2566 unsigned long start_lba = -1, end_lba = -1;
2567 unsigned long segment_size = -1, segment_mult = -1;
2568
2569 orig = map_entries = kstrdup(page, GFP_KERNEL);
2570 if (!map_entries)
2571 return -ENOMEM;
2572
2573 INIT_LIST_HEAD(&lba_list);
2574 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2575 if (!*ptr)
2576 continue;
2577
2578 if (num == 0) {
2579 if (sscanf(ptr, "%lu %lu\n",
2580 &segment_size, &segment_mult) != 2) {
2581 pr_err("Invalid line %d\n", num);
2582 ret = -EINVAL;
2583 break;
2584 }
2585 num++;
2586 continue;
2587 }
2588 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2589 pr_err("Invalid line %d\n", num);
2590 ret = -EINVAL;
2591 break;
2592 }
2593 ptr = strchr(ptr, ' ');
2594 if (!ptr) {
2595 pr_err("Invalid line %d, missing end lba\n", num);
2596 ret = -EINVAL;
2597 break;
2598 }
2599 ptr++;
2600 ptr = strchr(ptr, ' ');
2601 if (!ptr) {
2602 pr_err("Invalid line %d, missing state definitions\n",
2603 num);
2604 ret = -EINVAL;
2605 break;
2606 }
2607 ptr++;
2608 lba_map = core_alua_allocate_lba_map(&lba_list,
2609 start_lba, end_lba);
2610 if (IS_ERR(lba_map)) {
2611 ret = PTR_ERR(lba_map);
2612 break;
2613 }
2614 pg = 0;
2615 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2616 switch (state) {
2617 case 'O':
2618 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2619 break;
2620 case 'A':
2621 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2622 break;
2623 case 'S':
2624 alua_state = ALUA_ACCESS_STATE_STANDBY;
2625 break;
2626 case 'U':
2627 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2628 break;
2629 default:
2630 pr_err("Invalid ALUA state '%c'\n", state);
2631 ret = -EINVAL;
2632 goto out;
2633 }
2634
2635 ret = core_alua_allocate_lba_map_mem(lba_map,
2636 pg_id, alua_state);
2637 if (ret) {
2638 pr_err("Invalid target descriptor %d:%c "
2639 "at line %d\n",
2640 pg_id, state, num);
2641 break;
2642 }
2643 pg++;
2644 ptr = strchr(ptr, ' ');
2645 if (ptr)
2646 ptr++;
2647 else
2648 break;
2649 }
2650 if (pg_num == -1)
2651 pg_num = pg;
2652 else if (pg != pg_num) {
2653 pr_err("Only %d from %d port groups definitions "
2654 "at line %d\n", pg, pg_num, num);
2655 ret = -EINVAL;
2656 break;
2657 }
2658 num++;
2659 }
2660 out:
2661 if (ret) {
2662 core_alua_free_lba_map(&lba_list);
2663 count = ret;
2664 } else
2665 core_alua_set_lba_map(dev, &lba_list,
2666 segment_size, segment_mult);
2667 kfree(orig);
2668 return count;
2669 }
2670
2671 CONFIGFS_ATTR_RO(target_dev_, info);
2672 CONFIGFS_ATTR_WO(target_dev_, control);
2673 CONFIGFS_ATTR(target_dev_, alias);
2674 CONFIGFS_ATTR(target_dev_, udev_path);
2675 CONFIGFS_ATTR(target_dev_, enable);
2676 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2677 CONFIGFS_ATTR(target_dev_, lba_map);
2678
2679 static struct configfs_attribute *target_core_dev_attrs[] = {
2680 &target_dev_attr_info,
2681 &target_dev_attr_control,
2682 &target_dev_attr_alias,
2683 &target_dev_attr_udev_path,
2684 &target_dev_attr_enable,
2685 &target_dev_attr_alua_lu_gp,
2686 &target_dev_attr_lba_map,
2687 NULL,
2688 };
2689
2690 static void target_core_dev_release(struct config_item *item)
2691 {
2692 struct config_group *dev_cg = to_config_group(item);
2693 struct se_device *dev =
2694 container_of(dev_cg, struct se_device, dev_group);
2695
2696 target_free_device(dev);
2697 }
2698
2699 /*
2700 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2701 * within target_fabric_port_link()
2702 */
2703 struct configfs_item_operations target_core_dev_item_ops = {
2704 .release = target_core_dev_release,
2705 };
2706
2707 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2708
2709 /* End functions for struct config_item_type tb_dev_cit */
2710
2711 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2712
2713 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2714 {
2715 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2716 lu_gp_group);
2717 }
2718
2719 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2720 {
2721 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2722
2723 if (!lu_gp->lu_gp_valid_id)
2724 return 0;
2725 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2726 }
2727
2728 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2729 const char *page, size_t count)
2730 {
2731 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2732 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2733 unsigned long lu_gp_id;
2734 int ret;
2735
2736 ret = kstrtoul(page, 0, &lu_gp_id);
2737 if (ret < 0) {
2738 pr_err("kstrtoul() returned %d for"
2739 " lu_gp_id\n", ret);
2740 return ret;
2741 }
2742 if (lu_gp_id > 0x0000ffff) {
2743 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2744 " 0x0000ffff\n", lu_gp_id);
2745 return -EINVAL;
2746 }
2747
2748 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2749 if (ret < 0)
2750 return -EINVAL;
2751
2752 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2753 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2754 config_item_name(&alua_lu_gp_cg->cg_item),
2755 lu_gp->lu_gp_id);
2756
2757 return count;
2758 }
2759
2760 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2761 {
2762 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2763 struct se_device *dev;
2764 struct se_hba *hba;
2765 struct t10_alua_lu_gp_member *lu_gp_mem;
2766 ssize_t len = 0, cur_len;
2767 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2768
2769 spin_lock(&lu_gp->lu_gp_lock);
2770 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2771 dev = lu_gp_mem->lu_gp_mem_dev;
2772 hba = dev->se_hba;
2773
2774 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2775 config_item_name(&hba->hba_group.cg_item),
2776 config_item_name(&dev->dev_group.cg_item));
2777 cur_len++; /* Extra byte for NULL terminator */
2778
2779 if ((cur_len + len) > PAGE_SIZE) {
2780 pr_warn("Ran out of lu_gp_show_attr"
2781 "_members buffer\n");
2782 break;
2783 }
2784 memcpy(page+len, buf, cur_len);
2785 len += cur_len;
2786 }
2787 spin_unlock(&lu_gp->lu_gp_lock);
2788
2789 return len;
2790 }
2791
2792 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2793 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2794
2795 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2796 &target_lu_gp_attr_lu_gp_id,
2797 &target_lu_gp_attr_members,
2798 NULL,
2799 };
2800
2801 static void target_core_alua_lu_gp_release(struct config_item *item)
2802 {
2803 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2804 struct t10_alua_lu_gp, lu_gp_group);
2805
2806 core_alua_free_lu_gp(lu_gp);
2807 }
2808
2809 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2810 .release = target_core_alua_lu_gp_release,
2811 };
2812
2813 static const struct config_item_type target_core_alua_lu_gp_cit = {
2814 .ct_item_ops = &target_core_alua_lu_gp_ops,
2815 .ct_attrs = target_core_alua_lu_gp_attrs,
2816 .ct_owner = THIS_MODULE,
2817 };
2818
2819 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2820
2821 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2822
2823 static struct config_group *target_core_alua_create_lu_gp(
2824 struct config_group *group,
2825 const char *name)
2826 {
2827 struct t10_alua_lu_gp *lu_gp;
2828 struct config_group *alua_lu_gp_cg = NULL;
2829 struct config_item *alua_lu_gp_ci = NULL;
2830
2831 lu_gp = core_alua_allocate_lu_gp(name, 0);
2832 if (IS_ERR(lu_gp))
2833 return NULL;
2834
2835 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2836 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2837
2838 config_group_init_type_name(alua_lu_gp_cg, name,
2839 &target_core_alua_lu_gp_cit);
2840
2841 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2842 " Group: core/alua/lu_gps/%s\n",
2843 config_item_name(alua_lu_gp_ci));
2844
2845 return alua_lu_gp_cg;
2846
2847 }
2848
2849 static void target_core_alua_drop_lu_gp(
2850 struct config_group *group,
2851 struct config_item *item)
2852 {
2853 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2854 struct t10_alua_lu_gp, lu_gp_group);
2855
2856 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2857 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2858 config_item_name(item), lu_gp->lu_gp_id);
2859 /*
2860 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2861 * -> target_core_alua_lu_gp_release()
2862 */
2863 config_item_put(item);
2864 }
2865
2866 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2867 .make_group = &target_core_alua_create_lu_gp,
2868 .drop_item = &target_core_alua_drop_lu_gp,
2869 };
2870
2871 static const struct config_item_type target_core_alua_lu_gps_cit = {
2872 .ct_item_ops = NULL,
2873 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2874 .ct_owner = THIS_MODULE,
2875 };
2876
2877 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2878
2879 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2880
2881 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2882 {
2883 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2884 tg_pt_gp_group);
2885 }
2886
2887 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2888 char *page)
2889 {
2890 return sprintf(page, "%d\n",
2891 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2892 }
2893
2894 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2895 const char *page, size_t count)
2896 {
2897 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2898 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2899 unsigned long tmp;
2900 int new_state, ret;
2901
2902 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2903 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2904 return -EINVAL;
2905 }
2906 if (!target_dev_configured(dev)) {
2907 pr_err("Unable to set alua_access_state while device is"
2908 " not configured\n");
2909 return -ENODEV;
2910 }
2911
2912 ret = kstrtoul(page, 0, &tmp);
2913 if (ret < 0) {
2914 pr_err("Unable to extract new ALUA access state from"
2915 " %s\n", page);
2916 return ret;
2917 }
2918 new_state = (int)tmp;
2919
2920 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2921 pr_err("Unable to process implicit configfs ALUA"
2922 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2923 return -EINVAL;
2924 }
2925 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2926 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2927 /* LBA DEPENDENT is only allowed with implicit ALUA */
2928 pr_err("Unable to process implicit configfs ALUA transition"
2929 " while explicit ALUA management is enabled\n");
2930 return -EINVAL;
2931 }
2932
2933 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2934 NULL, NULL, new_state, 0);
2935 return (!ret) ? count : -EINVAL;
2936 }
2937
2938 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2939 char *page)
2940 {
2941 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2942 return sprintf(page, "%s\n",
2943 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2944 }
2945
2946 static ssize_t target_tg_pt_gp_alua_access_status_store(
2947 struct config_item *item, const char *page, size_t count)
2948 {
2949 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2950 unsigned long tmp;
2951 int new_status, ret;
2952
2953 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2954 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2955 return -EINVAL;
2956 }
2957
2958 ret = kstrtoul(page, 0, &tmp);
2959 if (ret < 0) {
2960 pr_err("Unable to extract new ALUA access status"
2961 " from %s\n", page);
2962 return ret;
2963 }
2964 new_status = (int)tmp;
2965
2966 if ((new_status != ALUA_STATUS_NONE) &&
2967 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2968 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2969 pr_err("Illegal ALUA access status: 0x%02x\n",
2970 new_status);
2971 return -EINVAL;
2972 }
2973
2974 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2975 return count;
2976 }
2977
2978 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2979 char *page)
2980 {
2981 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2982 }
2983
2984 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2985 const char *page, size_t count)
2986 {
2987 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2988 }
2989
2990 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2991 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2992 struct config_item *item, char *p) \
2993 { \
2994 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2995 return sprintf(p, "%d\n", \
2996 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2997 } \
2998 \
2999 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
3000 struct config_item *item, const char *p, size_t c) \
3001 { \
3002 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
3003 unsigned long tmp; \
3004 int ret; \
3005 \
3006 if (!t->tg_pt_gp_valid_id) { \
3007 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
3008 return -EINVAL; \
3009 } \
3010 \
3011 ret = kstrtoul(p, 0, &tmp); \
3012 if (ret < 0) { \
3013 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
3014 return -EINVAL; \
3015 } \
3016 if (tmp > 1) { \
3017 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
3018 return -EINVAL; \
3019 } \
3020 if (tmp) \
3021 t->tg_pt_gp_alua_supported_states |= _bit; \
3022 else \
3023 t->tg_pt_gp_alua_supported_states &= ~_bit; \
3024 \
3025 return c; \
3026 }
3027
3028 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
3029 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
3030 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
3031 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
3032 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
3033 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
3034 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
3035
3036 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
3037 struct config_item *item, char *page)
3038 {
3039 return sprintf(page, "%d\n",
3040 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
3041 }
3042
3043 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
3044 struct config_item *item, const char *page, size_t count)
3045 {
3046 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3047 unsigned long tmp;
3048 int ret;
3049
3050 ret = kstrtoul(page, 0, &tmp);
3051 if (ret < 0) {
3052 pr_err("Unable to extract alua_write_metadata\n");
3053 return ret;
3054 }
3055
3056 if ((tmp != 0) && (tmp != 1)) {
3057 pr_err("Illegal value for alua_write_metadata:"
3058 " %lu\n", tmp);
3059 return -EINVAL;
3060 }
3061 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
3062
3063 return count;
3064 }
3065
3066 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
3067 char *page)
3068 {
3069 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
3070 }
3071
3072 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
3073 const char *page, size_t count)
3074 {
3075 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
3076 count);
3077 }
3078
3079 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
3080 char *page)
3081 {
3082 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
3083 }
3084
3085 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
3086 const char *page, size_t count)
3087 {
3088 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
3089 count);
3090 }
3091
3092 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
3093 struct config_item *item, char *page)
3094 {
3095 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
3096 }
3097
3098 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3099 struct config_item *item, const char *page, size_t count)
3100 {
3101 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3102 count);
3103 }
3104
3105 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3106 char *page)
3107 {
3108 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3109 }
3110
3111 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3112 const char *page, size_t count)
3113 {
3114 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3115 }
3116
3117 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3118 char *page)
3119 {
3120 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3121
3122 if (!tg_pt_gp->tg_pt_gp_valid_id)
3123 return 0;
3124 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3125 }
3126
3127 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3128 const char *page, size_t count)
3129 {
3130 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3131 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3132 unsigned long tg_pt_gp_id;
3133 int ret;
3134
3135 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3136 if (ret < 0) {
3137 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3138 page);
3139 return ret;
3140 }
3141 if (tg_pt_gp_id > 0x0000ffff) {
3142 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3143 tg_pt_gp_id);
3144 return -EINVAL;
3145 }
3146
3147 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3148 if (ret < 0)
3149 return -EINVAL;
3150
3151 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3152 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3153 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3154 tg_pt_gp->tg_pt_gp_id);
3155
3156 return count;
3157 }
3158
3159 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3160 char *page)
3161 {
3162 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3163 struct se_lun *lun;
3164 ssize_t len = 0, cur_len;
3165 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3166
3167 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3168 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3169 lun_tg_pt_gp_link) {
3170 struct se_portal_group *tpg = lun->lun_tpg;
3171
3172 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3173 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3174 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3175 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3176 config_item_name(&lun->lun_group.cg_item));
3177 cur_len++; /* Extra byte for NULL terminator */
3178
3179 if ((cur_len + len) > PAGE_SIZE) {
3180 pr_warn("Ran out of lu_gp_show_attr"
3181 "_members buffer\n");
3182 break;
3183 }
3184 memcpy(page+len, buf, cur_len);
3185 len += cur_len;
3186 }
3187 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3188
3189 return len;
3190 }
3191
3192 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3193 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3194 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3195 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3196 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3197 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3198 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3199 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3200 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3201 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3202 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3203 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3204 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3205 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3206 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3207 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3208 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3209
3210 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3211 &target_tg_pt_gp_attr_alua_access_state,
3212 &target_tg_pt_gp_attr_alua_access_status,
3213 &target_tg_pt_gp_attr_alua_access_type,
3214 &target_tg_pt_gp_attr_alua_support_transitioning,
3215 &target_tg_pt_gp_attr_alua_support_offline,
3216 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3217 &target_tg_pt_gp_attr_alua_support_unavailable,
3218 &target_tg_pt_gp_attr_alua_support_standby,
3219 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3220 &target_tg_pt_gp_attr_alua_support_active_optimized,
3221 &target_tg_pt_gp_attr_alua_write_metadata,
3222 &target_tg_pt_gp_attr_nonop_delay_msecs,
3223 &target_tg_pt_gp_attr_trans_delay_msecs,
3224 &target_tg_pt_gp_attr_implicit_trans_secs,
3225 &target_tg_pt_gp_attr_preferred,
3226 &target_tg_pt_gp_attr_tg_pt_gp_id,
3227 &target_tg_pt_gp_attr_members,
3228 NULL,
3229 };
3230
3231 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3232 {
3233 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3234 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3235
3236 core_alua_free_tg_pt_gp(tg_pt_gp);
3237 }
3238
3239 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3240 .release = target_core_alua_tg_pt_gp_release,
3241 };
3242
3243 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3244 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3245 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3246 .ct_owner = THIS_MODULE,
3247 };
3248
3249 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3250
3251 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3252
3253 static struct config_group *target_core_alua_create_tg_pt_gp(
3254 struct config_group *group,
3255 const char *name)
3256 {
3257 struct t10_alua *alua = container_of(group, struct t10_alua,
3258 alua_tg_pt_gps_group);
3259 struct t10_alua_tg_pt_gp *tg_pt_gp;
3260 struct config_group *alua_tg_pt_gp_cg = NULL;
3261 struct config_item *alua_tg_pt_gp_ci = NULL;
3262
3263 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3264 if (!tg_pt_gp)
3265 return NULL;
3266
3267 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3268 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3269
3270 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3271 &target_core_alua_tg_pt_gp_cit);
3272
3273 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3274 " Group: alua/tg_pt_gps/%s\n",
3275 config_item_name(alua_tg_pt_gp_ci));
3276
3277 return alua_tg_pt_gp_cg;
3278 }
3279
3280 static void target_core_alua_drop_tg_pt_gp(
3281 struct config_group *group,
3282 struct config_item *item)
3283 {
3284 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3285 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3286
3287 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3288 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3289 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3290 /*
3291 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3292 * -> target_core_alua_tg_pt_gp_release().
3293 */
3294 config_item_put(item);
3295 }
3296
3297 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3298 .make_group = &target_core_alua_create_tg_pt_gp,
3299 .drop_item = &target_core_alua_drop_tg_pt_gp,
3300 };
3301
3302 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3303
3304 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3305
3306 /* Start functions for struct config_item_type target_core_alua_cit */
3307
3308 /*
3309 * target_core_alua_cit is a ConfigFS group that lives under
3310 * /sys/kernel/config/target/core/alua. There are default groups
3311 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3312 * target_core_alua_cit in target_core_init_configfs() below.
3313 */
3314 static const struct config_item_type target_core_alua_cit = {
3315 .ct_item_ops = NULL,
3316 .ct_attrs = NULL,
3317 .ct_owner = THIS_MODULE,
3318 };
3319
3320 /* End functions for struct config_item_type target_core_alua_cit */
3321
3322 /* Start functions for struct config_item_type tb_dev_stat_cit */
3323
3324 static struct config_group *target_core_stat_mkdir(
3325 struct config_group *group,
3326 const char *name)
3327 {
3328 return ERR_PTR(-ENOSYS);
3329 }
3330
3331 static void target_core_stat_rmdir(
3332 struct config_group *group,
3333 struct config_item *item)
3334 {
3335 return;
3336 }
3337
3338 static struct configfs_group_operations target_core_stat_group_ops = {
3339 .make_group = &target_core_stat_mkdir,
3340 .drop_item = &target_core_stat_rmdir,
3341 };
3342
3343 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3344
3345 /* End functions for struct config_item_type tb_dev_stat_cit */
3346
3347 /* Start functions for struct config_item_type target_core_hba_cit */
3348
3349 static struct config_group *target_core_make_subdev(
3350 struct config_group *group,
3351 const char *name)
3352 {
3353 struct t10_alua_tg_pt_gp *tg_pt_gp;
3354 struct config_item *hba_ci = &group->cg_item;
3355 struct se_hba *hba = item_to_hba(hba_ci);
3356 struct target_backend *tb = hba->backend;
3357 struct se_device *dev;
3358 int errno = -ENOMEM, ret;
3359
3360 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3361 if (ret)
3362 return ERR_PTR(ret);
3363
3364 dev = target_alloc_device(hba, name);
3365 if (!dev)
3366 goto out_unlock;
3367
3368 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3369
3370 config_group_init_type_name(&dev->dev_action_group, "action",
3371 &tb->tb_dev_action_cit);
3372 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3373
3374 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3375 &tb->tb_dev_attrib_cit);
3376 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3377
3378 config_group_init_type_name(&dev->dev_pr_group, "pr",
3379 &tb->tb_dev_pr_cit);
3380 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3381
3382 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3383 &tb->tb_dev_wwn_cit);
3384 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3385 &dev->dev_group);
3386
3387 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3388 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3389 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3390 &dev->dev_group);
3391
3392 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3393 "statistics", &tb->tb_dev_stat_cit);
3394 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3395 &dev->dev_group);
3396
3397 /*
3398 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3399 */
3400 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3401 if (!tg_pt_gp)
3402 goto out_free_device;
3403 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3404
3405 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3406 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3407 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3408 &dev->t10_alua.alua_tg_pt_gps_group);
3409
3410 /*
3411 * Add core/$HBA/$DEV/statistics/ default groups
3412 */
3413 target_stat_setup_dev_default_groups(dev);
3414
3415 mutex_lock(&target_devices_lock);
3416 target_devices++;
3417 mutex_unlock(&target_devices_lock);
3418
3419 mutex_unlock(&hba->hba_access_mutex);
3420 return &dev->dev_group;
3421
3422 out_free_device:
3423 target_free_device(dev);
3424 out_unlock:
3425 mutex_unlock(&hba->hba_access_mutex);
3426 return ERR_PTR(errno);
3427 }
3428
3429 static void target_core_drop_subdev(
3430 struct config_group *group,
3431 struct config_item *item)
3432 {
3433 struct config_group *dev_cg = to_config_group(item);
3434 struct se_device *dev =
3435 container_of(dev_cg, struct se_device, dev_group);
3436 struct se_hba *hba;
3437
3438 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3439
3440 mutex_lock(&hba->hba_access_mutex);
3441
3442 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3443 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3444
3445 /*
3446 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3447 * directly from target_core_alua_tg_pt_gp_release().
3448 */
3449 dev->t10_alua.default_tg_pt_gp = NULL;
3450
3451 configfs_remove_default_groups(dev_cg);
3452
3453 /*
3454 * se_dev is released from target_core_dev_item_ops->release()
3455 */
3456 config_item_put(item);
3457
3458 mutex_lock(&target_devices_lock);
3459 target_devices--;
3460 mutex_unlock(&target_devices_lock);
3461
3462 mutex_unlock(&hba->hba_access_mutex);
3463 }
3464
3465 static struct configfs_group_operations target_core_hba_group_ops = {
3466 .make_group = target_core_make_subdev,
3467 .drop_item = target_core_drop_subdev,
3468 };
3469
3470
3471 static inline struct se_hba *to_hba(struct config_item *item)
3472 {
3473 return container_of(to_config_group(item), struct se_hba, hba_group);
3474 }
3475
3476 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3477 {
3478 struct se_hba *hba = to_hba(item);
3479
3480 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3481 hba->hba_id, hba->backend->ops->name,
3482 TARGET_CORE_VERSION);
3483 }
3484
3485 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3486 {
3487 struct se_hba *hba = to_hba(item);
3488 int hba_mode = 0;
3489
3490 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3491 hba_mode = 1;
3492
3493 return sprintf(page, "%d\n", hba_mode);
3494 }
3495
3496 static ssize_t target_hba_mode_store(struct config_item *item,
3497 const char *page, size_t count)
3498 {
3499 struct se_hba *hba = to_hba(item);
3500 unsigned long mode_flag;
3501 int ret;
3502
3503 if (hba->backend->ops->pmode_enable_hba == NULL)
3504 return -EINVAL;
3505
3506 ret = kstrtoul(page, 0, &mode_flag);
3507 if (ret < 0) {
3508 pr_err("Unable to extract hba mode flag: %d\n", ret);
3509 return ret;
3510 }
3511
3512 if (hba->dev_count) {
3513 pr_err("Unable to set hba_mode with active devices\n");
3514 return -EINVAL;
3515 }
3516
3517 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3518 if (ret < 0)
3519 return -EINVAL;
3520 if (ret > 0)
3521 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3522 else if (ret == 0)
3523 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3524
3525 return count;
3526 }
3527
3528 CONFIGFS_ATTR_RO(target_, hba_info);
3529 CONFIGFS_ATTR(target_, hba_mode);
3530
3531 static void target_core_hba_release(struct config_item *item)
3532 {
3533 struct se_hba *hba = container_of(to_config_group(item),
3534 struct se_hba, hba_group);
3535 core_delete_hba(hba);
3536 }
3537
3538 static struct configfs_attribute *target_core_hba_attrs[] = {
3539 &target_attr_hba_info,
3540 &target_attr_hba_mode,
3541 NULL,
3542 };
3543
3544 static struct configfs_item_operations target_core_hba_item_ops = {
3545 .release = target_core_hba_release,
3546 };
3547
3548 static const struct config_item_type target_core_hba_cit = {
3549 .ct_item_ops = &target_core_hba_item_ops,
3550 .ct_group_ops = &target_core_hba_group_ops,
3551 .ct_attrs = target_core_hba_attrs,
3552 .ct_owner = THIS_MODULE,
3553 };
3554
3555 static struct config_group *target_core_call_addhbatotarget(
3556 struct config_group *group,
3557 const char *name)
3558 {
3559 char *se_plugin_str, *str, *str2;
3560 struct se_hba *hba;
3561 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3562 unsigned long plugin_dep_id = 0;
3563 int ret;
3564
3565 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3566 pr_err("Passed *name strlen(): %d exceeds"
3567 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3568 TARGET_CORE_NAME_MAX_LEN);
3569 return ERR_PTR(-ENAMETOOLONG);
3570 }
3571 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3572
3573 str = strstr(buf, "_");
3574 if (!str) {
3575 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3576 return ERR_PTR(-EINVAL);
3577 }
3578 se_plugin_str = buf;
3579 /*
3580 * Special case for subsystem plugins that have "_" in their names.
3581 * Namely rd_direct and rd_mcp..
3582 */
3583 str2 = strstr(str+1, "_");
3584 if (str2) {
3585 *str2 = '\0'; /* Terminate for *se_plugin_str */
3586 str2++; /* Skip to start of plugin dependent ID */
3587 str = str2;
3588 } else {
3589 *str = '\0'; /* Terminate for *se_plugin_str */
3590 str++; /* Skip to start of plugin dependent ID */
3591 }
3592
3593 ret = kstrtoul(str, 0, &plugin_dep_id);
3594 if (ret < 0) {
3595 pr_err("kstrtoul() returned %d for"
3596 " plugin_dep_id\n", ret);
3597 return ERR_PTR(ret);
3598 }
3599 /*
3600 * Load up TCM subsystem plugins if they have not already been loaded.
3601 */
3602 transport_subsystem_check_init();
3603
3604 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3605 if (IS_ERR(hba))
3606 return ERR_CAST(hba);
3607
3608 config_group_init_type_name(&hba->hba_group, name,
3609 &target_core_hba_cit);
3610
3611 return &hba->hba_group;
3612 }
3613
3614 static void target_core_call_delhbafromtarget(
3615 struct config_group *group,
3616 struct config_item *item)
3617 {
3618 /*
3619 * core_delete_hba() is called from target_core_hba_item_ops->release()
3620 * -> target_core_hba_release()
3621 */
3622 config_item_put(item);
3623 }
3624
3625 static struct configfs_group_operations target_core_group_ops = {
3626 .make_group = target_core_call_addhbatotarget,
3627 .drop_item = target_core_call_delhbafromtarget,
3628 };
3629
3630 static const struct config_item_type target_core_cit = {
3631 .ct_item_ops = NULL,
3632 .ct_group_ops = &target_core_group_ops,
3633 .ct_attrs = NULL,
3634 .ct_owner = THIS_MODULE,
3635 };
3636
3637 /* Stop functions for struct config_item_type target_core_hba_cit */
3638
3639 void target_setup_backend_cits(struct target_backend *tb)
3640 {
3641 target_core_setup_dev_cit(tb);
3642 target_core_setup_dev_action_cit(tb);
3643 target_core_setup_dev_attrib_cit(tb);
3644 target_core_setup_dev_pr_cit(tb);
3645 target_core_setup_dev_wwn_cit(tb);
3646 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3647 target_core_setup_dev_stat_cit(tb);
3648 }
3649
3650 static void target_init_dbroot(void)
3651 {
3652 struct file *fp;
3653
3654 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3655 fp = filp_open(db_root_stage, O_RDONLY, 0);
3656 if (IS_ERR(fp)) {
3657 pr_err("db_root: cannot open: %s\n", db_root_stage);
3658 return;
3659 }
3660 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3661 filp_close(fp, NULL);
3662 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3663 return;
3664 }
3665 filp_close(fp, NULL);
3666
3667 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3668 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3669 }
3670
3671 static int __init target_core_init_configfs(void)
3672 {
3673 struct configfs_subsystem *subsys = &target_core_fabrics;
3674 struct t10_alua_lu_gp *lu_gp;
3675 struct cred *kern_cred;
3676 const struct cred *old_cred;
3677 int ret;
3678
3679 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3680 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3681 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3682
3683 config_group_init(&subsys->su_group);
3684 mutex_init(&subsys->su_mutex);
3685
3686 ret = init_se_kmem_caches();
3687 if (ret < 0)
3688 return ret;
3689 /*
3690 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3691 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3692 */
3693 config_group_init_type_name(&target_core_hbagroup, "core",
3694 &target_core_cit);
3695 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3696
3697 /*
3698 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3699 */
3700 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3701 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3702
3703 /*
3704 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3705 * groups under /sys/kernel/config/target/core/alua/
3706 */
3707 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3708 &target_core_alua_lu_gps_cit);
3709 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3710
3711 /*
3712 * Add core/alua/lu_gps/default_lu_gp
3713 */
3714 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3715 if (IS_ERR(lu_gp)) {
3716 ret = -ENOMEM;
3717 goto out_global;
3718 }
3719
3720 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3721 &target_core_alua_lu_gp_cit);
3722 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3723
3724 default_lu_gp = lu_gp;
3725
3726 /*
3727 * Register the target_core_mod subsystem with configfs.
3728 */
3729 ret = configfs_register_subsystem(subsys);
3730 if (ret < 0) {
3731 pr_err("Error %d while registering subsystem %s\n",
3732 ret, subsys->su_group.cg_item.ci_namebuf);
3733 goto out_global;
3734 }
3735 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3736 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3737 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3738 /*
3739 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3740 */
3741 ret = rd_module_init();
3742 if (ret < 0)
3743 goto out;
3744
3745 ret = core_dev_setup_virtual_lun0();
3746 if (ret < 0)
3747 goto out;
3748
3749 ret = target_xcopy_setup_pt();
3750 if (ret < 0)
3751 goto out;
3752
3753 /* We use the kernel credentials to access the target directory */
3754 kern_cred = prepare_kernel_cred(&init_task);
3755 if (!kern_cred) {
3756 ret = -ENOMEM;
3757 goto out;
3758 }
3759 old_cred = override_creds(kern_cred);
3760 target_init_dbroot();
3761 revert_creds(old_cred);
3762 put_cred(kern_cred);
3763
3764 return 0;
3765
3766 out:
3767 target_xcopy_release_pt();
3768 configfs_unregister_subsystem(subsys);
3769 core_dev_release_virtual_lun0();
3770 rd_module_exit();
3771 out_global:
3772 if (default_lu_gp) {
3773 core_alua_free_lu_gp(default_lu_gp);
3774 default_lu_gp = NULL;
3775 }
3776 release_se_kmem_caches();
3777 return ret;
3778 }
3779
3780 static void __exit target_core_exit_configfs(void)
3781 {
3782 configfs_remove_default_groups(&alua_lu_gps_group);
3783 configfs_remove_default_groups(&alua_group);
3784 configfs_remove_default_groups(&target_core_hbagroup);
3785
3786 /*
3787 * We expect subsys->su_group.default_groups to be released
3788 * by configfs subsystem provider logic..
3789 */
3790 configfs_unregister_subsystem(&target_core_fabrics);
3791
3792 core_alua_free_lu_gp(default_lu_gp);
3793 default_lu_gp = NULL;
3794
3795 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3796 " Infrastructure\n");
3797
3798 core_dev_release_virtual_lun0();
3799 rd_module_exit();
3800 target_xcopy_release_pt();
3801 release_se_kmem_caches();
3802 }
3803
3804 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3805 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3806 MODULE_LICENSE("GPL");
3807
3808 module_init(target_core_init_configfs);
3809 module_exit(target_core_exit_configfs);
Kernel DRM miscellaneous fixes and cross-tree changes