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x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blob70657fd564406b3c137b02c3f61824f387f554aa
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43
44 #include "target_core_internal.h"
45 #include "target_core_alua.h"
46 #include "target_core_pr.h"
47 #include "target_core_rd.h"
48 #include "target_core_xcopy.h"
49
50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
52 { \
53 struct config_item_type *cit = &tb->tb_##_name##_cit; \
54 \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = _attrs; \
58 cit->ct_owner = tb->ops->owner; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
60 }
61
62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
64 { \
65 struct config_item_type *cit = &tb->tb_##_name##_cit; \
66 \
67 cit->ct_item_ops = _item_ops; \
68 cit->ct_group_ops = _group_ops; \
69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
70 cit->ct_owner = tb->ops->owner; \
71 pr_debug("Setup generic %s\n", __stringify(_name)); \
72 }
73
74 extern struct t10_alua_lu_gp *default_lu_gp;
75
76 static LIST_HEAD(g_tf_list);
77 static DEFINE_MUTEX(g_tf_lock);
78
79 static struct config_group target_core_hbagroup;
80 static struct config_group alua_group;
81 static struct config_group alua_lu_gps_group;
82
83 static inline struct se_hba *
84 item_to_hba(struct config_item *item)
85 {
86 return container_of(to_config_group(item), struct se_hba, hba_group);
87 }
88
89 /*
90 * Attributes for /sys/kernel/config/target/
91 */
92 static ssize_t target_core_item_version_show(struct config_item *item,
93 char *page)
94 {
95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
97 utsname()->sysname, utsname()->machine);
98 }
99
100 CONFIGFS_ATTR_RO(target_core_item_, version);
101
102 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
103 static char db_root_stage[DB_ROOT_LEN];
104
105 static ssize_t target_core_item_dbroot_show(struct config_item *item,
106 char *page)
107 {
108 return sprintf(page, "%s\n", db_root);
109 }
110
111 static ssize_t target_core_item_dbroot_store(struct config_item *item,
112 const char *page, size_t count)
113 {
114 ssize_t read_bytes;
115 struct file *fp;
116
117 mutex_lock(&g_tf_lock);
118 if (!list_empty(&g_tf_list)) {
119 mutex_unlock(&g_tf_lock);
120 pr_err("db_root: cannot be changed: target drivers registered");
121 return -EINVAL;
122 }
123
124 if (count > (DB_ROOT_LEN - 1)) {
125 mutex_unlock(&g_tf_lock);
126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
127 (int)count, DB_ROOT_LEN - 1);
128 return -EINVAL;
129 }
130
131 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
132 if (!read_bytes) {
133 mutex_unlock(&g_tf_lock);
134 return -EINVAL;
135 }
136 if (db_root_stage[read_bytes - 1] == '\n')
137 db_root_stage[read_bytes - 1] = '\0';
138
139 /* validate new db root before accepting it */
140 fp = filp_open(db_root_stage, O_RDONLY, 0);
141 if (IS_ERR(fp)) {
142 mutex_unlock(&g_tf_lock);
143 pr_err("db_root: cannot open: %s\n", db_root_stage);
144 return -EINVAL;
145 }
146 if (!S_ISDIR(file_inode(fp)->i_mode)) {
147 filp_close(fp, NULL);
148 mutex_unlock(&g_tf_lock);
149 pr_err("db_root: not a directory: %s\n", db_root_stage);
150 return -EINVAL;
151 }
152 filp_close(fp, NULL);
153
154 strncpy(db_root, db_root_stage, read_bytes);
155
156 mutex_unlock(&g_tf_lock);
157
158 return read_bytes;
159 }
160
161 CONFIGFS_ATTR(target_core_item_, dbroot);
162
163 static struct target_fabric_configfs *target_core_get_fabric(
164 const char *name)
165 {
166 struct target_fabric_configfs *tf;
167
168 if (!name)
169 return NULL;
170
171 mutex_lock(&g_tf_lock);
172 list_for_each_entry(tf, &g_tf_list, tf_list) {
173 if (!strcmp(tf->tf_ops->name, name)) {
174 atomic_inc(&tf->tf_access_cnt);
175 mutex_unlock(&g_tf_lock);
176 return tf;
177 }
178 }
179 mutex_unlock(&g_tf_lock);
180
181 return NULL;
182 }
183
184 /*
185 * Called from struct target_core_group_ops->make_group()
186 */
187 static struct config_group *target_core_register_fabric(
188 struct config_group *group,
189 const char *name)
190 {
191 struct target_fabric_configfs *tf;
192 int ret;
193
194 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
195 " %s\n", group, name);
196
197 tf = target_core_get_fabric(name);
198 if (!tf) {
199 pr_debug("target_core_register_fabric() trying autoload for %s\n",
200 name);
201
202 /*
203 * Below are some hardcoded request_module() calls to automatically
204 * local fabric modules when the following is called:
205 *
206 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
207 *
208 * Note that this does not limit which TCM fabric module can be
209 * registered, but simply provids auto loading logic for modules with
210 * mkdir(2) system calls with known TCM fabric modules.
211 */
212
213 if (!strncmp(name, "iscsi", 5)) {
214 /*
215 * Automatically load the LIO Target fabric module when the
216 * following is called:
217 *
218 * mkdir -p $CONFIGFS/target/iscsi
219 */
220 ret = request_module("iscsi_target_mod");
221 if (ret < 0) {
222 pr_debug("request_module() failed for"
223 " iscsi_target_mod.ko: %d\n", ret);
224 return ERR_PTR(-EINVAL);
225 }
226 } else if (!strncmp(name, "loopback", 8)) {
227 /*
228 * Automatically load the tcm_loop fabric module when the
229 * following is called:
230 *
231 * mkdir -p $CONFIGFS/target/loopback
232 */
233 ret = request_module("tcm_loop");
234 if (ret < 0) {
235 pr_debug("request_module() failed for"
236 " tcm_loop.ko: %d\n", ret);
237 return ERR_PTR(-EINVAL);
238 }
239 }
240
241 tf = target_core_get_fabric(name);
242 }
243
244 if (!tf) {
245 pr_debug("target_core_get_fabric() failed for %s\n",
246 name);
247 return ERR_PTR(-EINVAL);
248 }
249 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
250 " %s\n", tf->tf_ops->name);
251 /*
252 * On a successful target_core_get_fabric() look, the returned
253 * struct target_fabric_configfs *tf will contain a usage reference.
254 */
255 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
256 &tf->tf_wwn_cit);
257
258 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
259
260 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
261 &tf->tf_discovery_cit);
262 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
263
264 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
265 " %s\n", tf->tf_group.cg_item.ci_name);
266 return &tf->tf_group;
267 }
268
269 /*
270 * Called from struct target_core_group_ops->drop_item()
271 */
272 static void target_core_deregister_fabric(
273 struct config_group *group,
274 struct config_item *item)
275 {
276 struct target_fabric_configfs *tf = container_of(
277 to_config_group(item), struct target_fabric_configfs, tf_group);
278
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
280 " tf list\n", config_item_name(item));
281
282 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
283 " %s\n", tf->tf_ops->name);
284 atomic_dec(&tf->tf_access_cnt);
285
286 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
287 " %s\n", config_item_name(item));
288
289 configfs_remove_default_groups(&tf->tf_group);
290 config_item_put(item);
291 }
292
293 static struct configfs_group_operations target_core_fabric_group_ops = {
294 .make_group = &target_core_register_fabric,
295 .drop_item = &target_core_deregister_fabric,
296 };
297
298 /*
299 * All item attributes appearing in /sys/kernel/target/ appear here.
300 */
301 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
302 &target_core_item_attr_version,
303 &target_core_item_attr_dbroot,
304 NULL,
305 };
306
307 /*
308 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
309 */
310 static struct config_item_type target_core_fabrics_item = {
311 .ct_group_ops = &target_core_fabric_group_ops,
312 .ct_attrs = target_core_fabric_item_attrs,
313 .ct_owner = THIS_MODULE,
314 };
315
316 static struct configfs_subsystem target_core_fabrics = {
317 .su_group = {
318 .cg_item = {
319 .ci_namebuf = "target",
320 .ci_type = &target_core_fabrics_item,
321 },
322 },
323 };
324
325 int target_depend_item(struct config_item *item)
326 {
327 return configfs_depend_item(&target_core_fabrics, item);
328 }
329 EXPORT_SYMBOL(target_depend_item);
330
331 void target_undepend_item(struct config_item *item)
332 {
333 return configfs_undepend_item(item);
334 }
335 EXPORT_SYMBOL(target_undepend_item);
336
337 /*##############################################################################
338 // Start functions called by external Target Fabrics Modules
339 //############################################################################*/
340
341 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
342 {
343 if (!tfo->name) {
344 pr_err("Missing tfo->name\n");
345 return -EINVAL;
346 }
347 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
348 pr_err("Passed name: %s exceeds TARGET_FABRIC"
349 "_NAME_SIZE\n", tfo->name);
350 return -EINVAL;
351 }
352 if (!tfo->get_fabric_name) {
353 pr_err("Missing tfo->get_fabric_name()\n");
354 return -EINVAL;
355 }
356 if (!tfo->tpg_get_wwn) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
358 return -EINVAL;
359 }
360 if (!tfo->tpg_get_tag) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_check_demo_mode) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_check_demo_mode_cache) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_check_demo_mode_write_protect) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_check_prod_mode_write_protect) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_inst_index) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
382 return -EINVAL;
383 }
384 if (!tfo->release_cmd) {
385 pr_err("Missing tfo->release_cmd()\n");
386 return -EINVAL;
387 }
388 if (!tfo->sess_get_index) {
389 pr_err("Missing tfo->sess_get_index()\n");
390 return -EINVAL;
391 }
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
394 return -EINVAL;
395 }
396 if (!tfo->write_pending_status) {
397 pr_err("Missing tfo->write_pending_status()\n");
398 return -EINVAL;
399 }
400 if (!tfo->set_default_node_attributes) {
401 pr_err("Missing tfo->set_default_node_attributes()\n");
402 return -EINVAL;
403 }
404 if (!tfo->get_cmd_state) {
405 pr_err("Missing tfo->get_cmd_state()\n");
406 return -EINVAL;
407 }
408 if (!tfo->queue_data_in) {
409 pr_err("Missing tfo->queue_data_in()\n");
410 return -EINVAL;
411 }
412 if (!tfo->queue_status) {
413 pr_err("Missing tfo->queue_status()\n");
414 return -EINVAL;
415 }
416 if (!tfo->queue_tm_rsp) {
417 pr_err("Missing tfo->queue_tm_rsp()\n");
418 return -EINVAL;
419 }
420 if (!tfo->aborted_task) {
421 pr_err("Missing tfo->aborted_task()\n");
422 return -EINVAL;
423 }
424 if (!tfo->check_stop_free) {
425 pr_err("Missing tfo->check_stop_free()\n");
426 return -EINVAL;
427 }
428 /*
429 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
430 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
431 * target_core_fabric_configfs.c WWN+TPG group context code.
432 */
433 if (!tfo->fabric_make_wwn) {
434 pr_err("Missing tfo->fabric_make_wwn()\n");
435 return -EINVAL;
436 }
437 if (!tfo->fabric_drop_wwn) {
438 pr_err("Missing tfo->fabric_drop_wwn()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fabric_make_tpg) {
442 pr_err("Missing tfo->fabric_make_tpg()\n");
443 return -EINVAL;
444 }
445 if (!tfo->fabric_drop_tpg) {
446 pr_err("Missing tfo->fabric_drop_tpg()\n");
447 return -EINVAL;
448 }
449
450 return 0;
451 }
452
453 int target_register_template(const struct target_core_fabric_ops *fo)
454 {
455 struct target_fabric_configfs *tf;
456 int ret;
457
458 ret = target_fabric_tf_ops_check(fo);
459 if (ret)
460 return ret;
461
462 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
463 if (!tf) {
464 pr_err("%s: could not allocate memory!\n", __func__);
465 return -ENOMEM;
466 }
467
468 INIT_LIST_HEAD(&tf->tf_list);
469 atomic_set(&tf->tf_access_cnt, 0);
470 tf->tf_ops = fo;
471 target_fabric_setup_cits(tf);
472
473 mutex_lock(&g_tf_lock);
474 list_add_tail(&tf->tf_list, &g_tf_list);
475 mutex_unlock(&g_tf_lock);
476
477 return 0;
478 }
479 EXPORT_SYMBOL(target_register_template);
480
481 void target_unregister_template(const struct target_core_fabric_ops *fo)
482 {
483 struct target_fabric_configfs *t;
484
485 mutex_lock(&g_tf_lock);
486 list_for_each_entry(t, &g_tf_list, tf_list) {
487 if (!strcmp(t->tf_ops->name, fo->name)) {
488 BUG_ON(atomic_read(&t->tf_access_cnt));
489 list_del(&t->tf_list);
490 mutex_unlock(&g_tf_lock);
491 /*
492 * Wait for any outstanding fabric se_deve_entry->rcu_head
493 * callbacks to complete post kfree_rcu(), before allowing
494 * fabric driver unload of TFO->module to proceed.
495 */
496 rcu_barrier();
497 kfree(t);
498 return;
499 }
500 }
501 mutex_unlock(&g_tf_lock);
502 }
503 EXPORT_SYMBOL(target_unregister_template);
504
505 /*##############################################################################
506 // Stop functions called by external Target Fabrics Modules
507 //############################################################################*/
508
509 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
510 {
511 return container_of(to_config_group(item), struct se_dev_attrib,
512 da_group);
513 }
514
515 /* Start functions for struct config_item_type tb_dev_attrib_cit */
516 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
517 static ssize_t _name##_show(struct config_item *item, char *page) \
518 { \
519 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
520 }
521
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
534 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
535 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
536 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
537 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
538 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
539 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
540 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
541 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
542 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
543 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
544 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
545 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
546 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
547 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
549 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
550 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
551 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
552
553 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
554 static ssize_t _name##_store(struct config_item *item, const char *page,\
555 size_t count) \
556 { \
557 struct se_dev_attrib *da = to_attrib(item); \
558 u32 val; \
559 int ret; \
560 \
561 ret = kstrtou32(page, 0, &val); \
562 if (ret < 0) \
563 return ret; \
564 da->_name = val; \
565 return count; \
566 }
567
568 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
570 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
571 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
572 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
573
574 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
575 static ssize_t _name##_store(struct config_item *item, const char *page, \
576 size_t count) \
577 { \
578 struct se_dev_attrib *da = to_attrib(item); \
579 bool flag; \
580 int ret; \
581 \
582 ret = strtobool(page, &flag); \
583 if (ret < 0) \
584 return ret; \
585 da->_name = flag; \
586 return count; \
587 }
588
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
593 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
594
595 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
596 static ssize_t _name##_store(struct config_item *item, const char *page,\
597 size_t count) \
598 { \
599 printk_once(KERN_WARNING \
600 "ignoring deprecated %s attribute\n", \
601 __stringify(_name)); \
602 return count; \
603 }
604
605 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
606 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
607
608 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
609 {
610 const char *configname;
611
612 configname = config_item_name(&dev->dev_group.cg_item);
613 if (strlen(configname) >= 16) {
614 pr_warn("dev[%p]: Backstore name '%s' is too long for "
615 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
616 configname);
617 }
618 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
619 }
620
621 static ssize_t emulate_model_alias_store(struct config_item *item,
622 const char *page, size_t count)
623 {
624 struct se_dev_attrib *da = to_attrib(item);
625 struct se_device *dev = da->da_dev;
626 bool flag;
627 int ret;
628
629 if (dev->export_count) {
630 pr_err("dev[%p]: Unable to change model alias"
631 " while export_count is %d\n",
632 dev, dev->export_count);
633 return -EINVAL;
634 }
635
636 ret = strtobool(page, &flag);
637 if (ret < 0)
638 return ret;
639
640 if (flag) {
641 dev_set_t10_wwn_model_alias(dev);
642 } else {
643 strncpy(&dev->t10_wwn.model[0],
644 dev->transport->inquiry_prod, 16);
645 }
646 da->emulate_model_alias = flag;
647 return count;
648 }
649
650 static ssize_t emulate_write_cache_store(struct config_item *item,
651 const char *page, size_t count)
652 {
653 struct se_dev_attrib *da = to_attrib(item);
654 bool flag;
655 int ret;
656
657 ret = strtobool(page, &flag);
658 if (ret < 0)
659 return ret;
660
661 if (flag && da->da_dev->transport->get_write_cache) {
662 pr_err("emulate_write_cache not supported for this device\n");
663 return -EINVAL;
664 }
665
666 da->emulate_write_cache = flag;
667 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
668 da->da_dev, flag);
669 return count;
670 }
671
672 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
673 const char *page, size_t count)
674 {
675 struct se_dev_attrib *da = to_attrib(item);
676 u32 val;
677 int ret;
678
679 ret = kstrtou32(page, 0, &val);
680 if (ret < 0)
681 return ret;
682
683 if (val != 0 && val != 1 && val != 2) {
684 pr_err("Illegal value %d\n", val);
685 return -EINVAL;
686 }
687
688 if (da->da_dev->export_count) {
689 pr_err("dev[%p]: Unable to change SE Device"
690 " UA_INTRLCK_CTRL while export_count is %d\n",
691 da->da_dev, da->da_dev->export_count);
692 return -EINVAL;
693 }
694 da->emulate_ua_intlck_ctrl = val;
695 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
696 da->da_dev, val);
697 return count;
698 }
699
700 static ssize_t emulate_tas_store(struct config_item *item,
701 const char *page, size_t count)
702 {
703 struct se_dev_attrib *da = to_attrib(item);
704 bool flag;
705 int ret;
706
707 ret = strtobool(page, &flag);
708 if (ret < 0)
709 return ret;
710
711 if (da->da_dev->export_count) {
712 pr_err("dev[%p]: Unable to change SE Device TAS while"
713 " export_count is %d\n",
714 da->da_dev, da->da_dev->export_count);
715 return -EINVAL;
716 }
717 da->emulate_tas = flag;
718 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
719 da->da_dev, flag ? "Enabled" : "Disabled");
720
721 return count;
722 }
723
724 static ssize_t emulate_tpu_store(struct config_item *item,
725 const char *page, size_t count)
726 {
727 struct se_dev_attrib *da = to_attrib(item);
728 bool flag;
729 int ret;
730
731 ret = strtobool(page, &flag);
732 if (ret < 0)
733 return ret;
734
735 /*
736 * We expect this value to be non-zero when generic Block Layer
737 * Discard supported is detected iblock_create_virtdevice().
738 */
739 if (flag && !da->max_unmap_block_desc_count) {
740 pr_err("Generic Block Discard not supported\n");
741 return -ENOSYS;
742 }
743
744 da->emulate_tpu = flag;
745 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
746 da->da_dev, flag);
747 return count;
748 }
749
750 static ssize_t emulate_tpws_store(struct config_item *item,
751 const char *page, size_t count)
752 {
753 struct se_dev_attrib *da = to_attrib(item);
754 bool flag;
755 int ret;
756
757 ret = strtobool(page, &flag);
758 if (ret < 0)
759 return ret;
760
761 /*
762 * We expect this value to be non-zero when generic Block Layer
763 * Discard supported is detected iblock_create_virtdevice().
764 */
765 if (flag && !da->max_unmap_block_desc_count) {
766 pr_err("Generic Block Discard not supported\n");
767 return -ENOSYS;
768 }
769
770 da->emulate_tpws = flag;
771 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
772 da->da_dev, flag);
773 return count;
774 }
775
776 static ssize_t pi_prot_type_store(struct config_item *item,
777 const char *page, size_t count)
778 {
779 struct se_dev_attrib *da = to_attrib(item);
780 int old_prot = da->pi_prot_type, ret;
781 struct se_device *dev = da->da_dev;
782 u32 flag;
783
784 ret = kstrtou32(page, 0, &flag);
785 if (ret < 0)
786 return ret;
787
788 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
789 pr_err("Illegal value %d for pi_prot_type\n", flag);
790 return -EINVAL;
791 }
792 if (flag == 2) {
793 pr_err("DIF TYPE2 protection currently not supported\n");
794 return -ENOSYS;
795 }
796 if (da->hw_pi_prot_type) {
797 pr_warn("DIF protection enabled on underlying hardware,"
798 " ignoring\n");
799 return count;
800 }
801 if (!dev->transport->init_prot || !dev->transport->free_prot) {
802 /* 0 is only allowed value for non-supporting backends */
803 if (flag == 0)
804 return count;
805
806 pr_err("DIF protection not supported by backend: %s\n",
807 dev->transport->name);
808 return -ENOSYS;
809 }
810 if (!(dev->dev_flags & DF_CONFIGURED)) {
811 pr_err("DIF protection requires device to be configured\n");
812 return -ENODEV;
813 }
814 if (dev->export_count) {
815 pr_err("dev[%p]: Unable to change SE Device PROT type while"
816 " export_count is %d\n", dev, dev->export_count);
817 return -EINVAL;
818 }
819
820 da->pi_prot_type = flag;
821
822 if (flag && !old_prot) {
823 ret = dev->transport->init_prot(dev);
824 if (ret) {
825 da->pi_prot_type = old_prot;
826 return ret;
827 }
828
829 } else if (!flag && old_prot) {
830 dev->transport->free_prot(dev);
831 }
832
833 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
834 return count;
835 }
836
837 static ssize_t pi_prot_format_store(struct config_item *item,
838 const char *page, size_t count)
839 {
840 struct se_dev_attrib *da = to_attrib(item);
841 struct se_device *dev = da->da_dev;
842 bool flag;
843 int ret;
844
845 ret = strtobool(page, &flag);
846 if (ret < 0)
847 return ret;
848
849 if (!flag)
850 return count;
851
852 if (!dev->transport->format_prot) {
853 pr_err("DIF protection format not supported by backend %s\n",
854 dev->transport->name);
855 return -ENOSYS;
856 }
857 if (!(dev->dev_flags & DF_CONFIGURED)) {
858 pr_err("DIF protection format requires device to be configured\n");
859 return -ENODEV;
860 }
861 if (dev->export_count) {
862 pr_err("dev[%p]: Unable to format SE Device PROT type while"
863 " export_count is %d\n", dev, dev->export_count);
864 return -EINVAL;
865 }
866
867 ret = dev->transport->format_prot(dev);
868 if (ret)
869 return ret;
870
871 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
872 return count;
873 }
874
875 static ssize_t force_pr_aptpl_store(struct config_item *item,
876 const char *page, size_t count)
877 {
878 struct se_dev_attrib *da = to_attrib(item);
879 bool flag;
880 int ret;
881
882 ret = strtobool(page, &flag);
883 if (ret < 0)
884 return ret;
885 if (da->da_dev->export_count) {
886 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
887 " export_count is %d\n",
888 da->da_dev, da->da_dev->export_count);
889 return -EINVAL;
890 }
891
892 da->force_pr_aptpl = flag;
893 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
894 return count;
895 }
896
897 static ssize_t emulate_rest_reord_store(struct config_item *item,
898 const char *page, size_t count)
899 {
900 struct se_dev_attrib *da = to_attrib(item);
901 bool flag;
902 int ret;
903
904 ret = strtobool(page, &flag);
905 if (ret < 0)
906 return ret;
907
908 if (flag != 0) {
909 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
910 " reordering not implemented\n", da->da_dev);
911 return -ENOSYS;
912 }
913 da->emulate_rest_reord = flag;
914 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
915 da->da_dev, flag);
916 return count;
917 }
918
919 static ssize_t unmap_zeroes_data_store(struct config_item *item,
920 const char *page, size_t count)
921 {
922 struct se_dev_attrib *da = to_attrib(item);
923 bool flag;
924 int ret;
925
926 ret = strtobool(page, &flag);
927 if (ret < 0)
928 return ret;
929
930 if (da->da_dev->export_count) {
931 pr_err("dev[%p]: Unable to change SE Device"
932 " unmap_zeroes_data while export_count is %d\n",
933 da->da_dev, da->da_dev->export_count);
934 return -EINVAL;
935 }
936 /*
937 * We expect this value to be non-zero when generic Block Layer
938 * Discard supported is detected iblock_configure_device().
939 */
940 if (flag && !da->max_unmap_block_desc_count) {
941 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
942 " because max_unmap_block_desc_count is zero\n",
943 da->da_dev);
944 return -ENOSYS;
945 }
946 da->unmap_zeroes_data = flag;
947 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
948 da->da_dev, flag);
949 return count;
950 }
951
952 /*
953 * Note, this can only be called on unexported SE Device Object.
954 */
955 static ssize_t queue_depth_store(struct config_item *item,
956 const char *page, size_t count)
957 {
958 struct se_dev_attrib *da = to_attrib(item);
959 struct se_device *dev = da->da_dev;
960 u32 val;
961 int ret;
962
963 ret = kstrtou32(page, 0, &val);
964 if (ret < 0)
965 return ret;
966
967 if (dev->export_count) {
968 pr_err("dev[%p]: Unable to change SE Device TCQ while"
969 " export_count is %d\n",
970 dev, dev->export_count);
971 return -EINVAL;
972 }
973 if (!val) {
974 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
975 return -EINVAL;
976 }
977
978 if (val > dev->dev_attrib.queue_depth) {
979 if (val > dev->dev_attrib.hw_queue_depth) {
980 pr_err("dev[%p]: Passed queue_depth:"
981 " %u exceeds TCM/SE_Device MAX"
982 " TCQ: %u\n", dev, val,
983 dev->dev_attrib.hw_queue_depth);
984 return -EINVAL;
985 }
986 }
987 da->queue_depth = dev->queue_depth = val;
988 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
989 return count;
990 }
991
992 static ssize_t optimal_sectors_store(struct config_item *item,
993 const char *page, size_t count)
994 {
995 struct se_dev_attrib *da = to_attrib(item);
996 u32 val;
997 int ret;
998
999 ret = kstrtou32(page, 0, &val);
1000 if (ret < 0)
1001 return ret;
1002
1003 if (da->da_dev->export_count) {
1004 pr_err("dev[%p]: Unable to change SE Device"
1005 " optimal_sectors while export_count is %d\n",
1006 da->da_dev, da->da_dev->export_count);
1007 return -EINVAL;
1008 }
1009 if (val > da->hw_max_sectors) {
1010 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1011 " greater than hw_max_sectors: %u\n",
1012 da->da_dev, val, da->hw_max_sectors);
1013 return -EINVAL;
1014 }
1015
1016 da->optimal_sectors = val;
1017 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1018 da->da_dev, val);
1019 return count;
1020 }
1021
1022 static ssize_t block_size_store(struct config_item *item,
1023 const char *page, size_t count)
1024 {
1025 struct se_dev_attrib *da = to_attrib(item);
1026 u32 val;
1027 int ret;
1028
1029 ret = kstrtou32(page, 0, &val);
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 block_size"
1035 " while export_count is %d\n",
1036 da->da_dev, da->da_dev->export_count);
1037 return -EINVAL;
1038 }
1039
1040 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1041 pr_err("dev[%p]: Illegal value for block_device: %u"
1042 " for SE device, must be 512, 1024, 2048 or 4096\n",
1043 da->da_dev, val);
1044 return -EINVAL;
1045 }
1046
1047 da->block_size = val;
1048 if (da->max_bytes_per_io)
1049 da->hw_max_sectors = da->max_bytes_per_io / val;
1050
1051 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1052 da->da_dev, val);
1053 return count;
1054 }
1055
1056 CONFIGFS_ATTR(, emulate_model_alias);
1057 CONFIGFS_ATTR(, emulate_dpo);
1058 CONFIGFS_ATTR(, emulate_fua_write);
1059 CONFIGFS_ATTR(, emulate_fua_read);
1060 CONFIGFS_ATTR(, emulate_write_cache);
1061 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1062 CONFIGFS_ATTR(, emulate_tas);
1063 CONFIGFS_ATTR(, emulate_tpu);
1064 CONFIGFS_ATTR(, emulate_tpws);
1065 CONFIGFS_ATTR(, emulate_caw);
1066 CONFIGFS_ATTR(, emulate_3pc);
1067 CONFIGFS_ATTR(, pi_prot_type);
1068 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1069 CONFIGFS_ATTR(, pi_prot_format);
1070 CONFIGFS_ATTR(, enforce_pr_isids);
1071 CONFIGFS_ATTR(, is_nonrot);
1072 CONFIGFS_ATTR(, emulate_rest_reord);
1073 CONFIGFS_ATTR(, force_pr_aptpl);
1074 CONFIGFS_ATTR_RO(, hw_block_size);
1075 CONFIGFS_ATTR(, block_size);
1076 CONFIGFS_ATTR_RO(, hw_max_sectors);
1077 CONFIGFS_ATTR(, optimal_sectors);
1078 CONFIGFS_ATTR_RO(, hw_queue_depth);
1079 CONFIGFS_ATTR(, queue_depth);
1080 CONFIGFS_ATTR(, max_unmap_lba_count);
1081 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1082 CONFIGFS_ATTR(, unmap_granularity);
1083 CONFIGFS_ATTR(, unmap_granularity_alignment);
1084 CONFIGFS_ATTR(, unmap_zeroes_data);
1085 CONFIGFS_ATTR(, max_write_same_len);
1086
1087 /*
1088 * dev_attrib attributes for devices using the target core SBC/SPC
1089 * interpreter. Any backend using spc_parse_cdb should be using
1090 * these.
1091 */
1092 struct configfs_attribute *sbc_attrib_attrs[] = {
1093 &attr_emulate_model_alias,
1094 &attr_emulate_dpo,
1095 &attr_emulate_fua_write,
1096 &attr_emulate_fua_read,
1097 &attr_emulate_write_cache,
1098 &attr_emulate_ua_intlck_ctrl,
1099 &attr_emulate_tas,
1100 &attr_emulate_tpu,
1101 &attr_emulate_tpws,
1102 &attr_emulate_caw,
1103 &attr_emulate_3pc,
1104 &attr_pi_prot_type,
1105 &attr_hw_pi_prot_type,
1106 &attr_pi_prot_format,
1107 &attr_enforce_pr_isids,
1108 &attr_is_nonrot,
1109 &attr_emulate_rest_reord,
1110 &attr_force_pr_aptpl,
1111 &attr_hw_block_size,
1112 &attr_block_size,
1113 &attr_hw_max_sectors,
1114 &attr_optimal_sectors,
1115 &attr_hw_queue_depth,
1116 &attr_queue_depth,
1117 &attr_max_unmap_lba_count,
1118 &attr_max_unmap_block_desc_count,
1119 &attr_unmap_granularity,
1120 &attr_unmap_granularity_alignment,
1121 &attr_unmap_zeroes_data,
1122 &attr_max_write_same_len,
1123 NULL,
1124 };
1125 EXPORT_SYMBOL(sbc_attrib_attrs);
1126
1127 /*
1128 * Minimal dev_attrib attributes for devices passing through CDBs.
1129 * In this case we only provide a few read-only attributes for
1130 * backwards compatibility.
1131 */
1132 struct configfs_attribute *passthrough_attrib_attrs[] = {
1133 &attr_hw_pi_prot_type,
1134 &attr_hw_block_size,
1135 &attr_hw_max_sectors,
1136 &attr_hw_queue_depth,
1137 NULL,
1138 };
1139 EXPORT_SYMBOL(passthrough_attrib_attrs);
1140
1141 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1142
1143 /* End functions for struct config_item_type tb_dev_attrib_cit */
1144
1145 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1146
1147 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1148 {
1149 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1150 }
1151
1152 /*
1153 * VPD page 0x80 Unit serial
1154 */
1155 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1156 char *page)
1157 {
1158 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1159 &to_t10_wwn(item)->unit_serial[0]);
1160 }
1161
1162 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1163 const char *page, size_t count)
1164 {
1165 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1166 struct se_device *dev = t10_wwn->t10_dev;
1167 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1168
1169 /*
1170 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1171 * from the struct scsi_device level firmware, do not allow
1172 * VPD Unit Serial to be emulated.
1173 *
1174 * Note this struct scsi_device could also be emulating VPD
1175 * information from its drivers/scsi LLD. But for now we assume
1176 * it is doing 'the right thing' wrt a world wide unique
1177 * VPD Unit Serial Number that OS dependent multipath can depend on.
1178 */
1179 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1180 pr_err("Underlying SCSI device firmware provided VPD"
1181 " Unit Serial, ignoring request\n");
1182 return -EOPNOTSUPP;
1183 }
1184
1185 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1186 pr_err("Emulated VPD Unit Serial exceeds"
1187 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1188 return -EOVERFLOW;
1189 }
1190 /*
1191 * Check to see if any active $FABRIC_MOD exports exist. If they
1192 * do exist, fail here as changing this information on the fly
1193 * (underneath the initiator side OS dependent multipath code)
1194 * could cause negative effects.
1195 */
1196 if (dev->export_count) {
1197 pr_err("Unable to set VPD Unit Serial while"
1198 " active %d $FABRIC_MOD exports exist\n",
1199 dev->export_count);
1200 return -EINVAL;
1201 }
1202
1203 /*
1204 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1205 *
1206 * Also, strip any newline added from the userspace
1207 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1208 */
1209 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1210 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1211 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1212 "%s", strstrip(buf));
1213 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1214
1215 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1216 " %s\n", dev->t10_wwn.unit_serial);
1217
1218 return count;
1219 }
1220
1221 /*
1222 * VPD page 0x83 Protocol Identifier
1223 */
1224 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1225 char *page)
1226 {
1227 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1228 struct t10_vpd *vpd;
1229 unsigned char buf[VPD_TMP_BUF_SIZE];
1230 ssize_t len = 0;
1231
1232 memset(buf, 0, VPD_TMP_BUF_SIZE);
1233
1234 spin_lock(&t10_wwn->t10_vpd_lock);
1235 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1236 if (!vpd->protocol_identifier_set)
1237 continue;
1238
1239 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1240
1241 if (len + strlen(buf) >= PAGE_SIZE)
1242 break;
1243
1244 len += sprintf(page+len, "%s", buf);
1245 }
1246 spin_unlock(&t10_wwn->t10_vpd_lock);
1247
1248 return len;
1249 }
1250
1251 /*
1252 * Generic wrapper for dumping VPD identifiers by association.
1253 */
1254 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1255 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1256 char *page) \
1257 { \
1258 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1259 struct t10_vpd *vpd; \
1260 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1261 ssize_t len = 0; \
1262 \
1263 spin_lock(&t10_wwn->t10_vpd_lock); \
1264 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1265 if (vpd->association != _assoc) \
1266 continue; \
1267 \
1268 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1269 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1270 if (len + strlen(buf) >= PAGE_SIZE) \
1271 break; \
1272 len += sprintf(page+len, "%s", buf); \
1273 \
1274 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1275 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1276 if (len + strlen(buf) >= PAGE_SIZE) \
1277 break; \
1278 len += sprintf(page+len, "%s", buf); \
1279 \
1280 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1281 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1282 if (len + strlen(buf) >= PAGE_SIZE) \
1283 break; \
1284 len += sprintf(page+len, "%s", buf); \
1285 } \
1286 spin_unlock(&t10_wwn->t10_vpd_lock); \
1287 \
1288 return len; \
1289 }
1290
1291 /* VPD page 0x83 Association: Logical Unit */
1292 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1293 /* VPD page 0x83 Association: Target Port */
1294 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1295 /* VPD page 0x83 Association: SCSI Target Device */
1296 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1297
1298 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1299 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1300 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1301 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1302 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1303
1304 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1305 &target_wwn_attr_vpd_unit_serial,
1306 &target_wwn_attr_vpd_protocol_identifier,
1307 &target_wwn_attr_vpd_assoc_logical_unit,
1308 &target_wwn_attr_vpd_assoc_target_port,
1309 &target_wwn_attr_vpd_assoc_scsi_target_device,
1310 NULL,
1311 };
1312
1313 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1314
1315 /* End functions for struct config_item_type tb_dev_wwn_cit */
1316
1317 /* Start functions for struct config_item_type tb_dev_pr_cit */
1318
1319 static struct se_device *pr_to_dev(struct config_item *item)
1320 {
1321 return container_of(to_config_group(item), struct se_device,
1322 dev_pr_group);
1323 }
1324
1325 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1326 char *page)
1327 {
1328 struct se_node_acl *se_nacl;
1329 struct t10_pr_registration *pr_reg;
1330 char i_buf[PR_REG_ISID_ID_LEN];
1331
1332 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1333
1334 pr_reg = dev->dev_pr_res_holder;
1335 if (!pr_reg)
1336 return sprintf(page, "No SPC-3 Reservation holder\n");
1337
1338 se_nacl = pr_reg->pr_reg_nacl;
1339 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1340
1341 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1342 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1343 se_nacl->initiatorname, i_buf);
1344 }
1345
1346 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1347 char *page)
1348 {
1349 struct se_node_acl *se_nacl;
1350 ssize_t len;
1351
1352 se_nacl = dev->dev_reserved_node_acl;
1353 if (se_nacl) {
1354 len = sprintf(page,
1355 "SPC-2 Reservation: %s Initiator: %s\n",
1356 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1357 se_nacl->initiatorname);
1358 } else {
1359 len = sprintf(page, "No SPC-2 Reservation holder\n");
1360 }
1361 return len;
1362 }
1363
1364 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1365 {
1366 struct se_device *dev = pr_to_dev(item);
1367 int ret;
1368
1369 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1370 return sprintf(page, "Passthrough\n");
1371
1372 spin_lock(&dev->dev_reservation_lock);
1373 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1374 ret = target_core_dev_pr_show_spc2_res(dev, page);
1375 else
1376 ret = target_core_dev_pr_show_spc3_res(dev, page);
1377 spin_unlock(&dev->dev_reservation_lock);
1378 return ret;
1379 }
1380
1381 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1382 char *page)
1383 {
1384 struct se_device *dev = pr_to_dev(item);
1385 ssize_t len = 0;
1386
1387 spin_lock(&dev->dev_reservation_lock);
1388 if (!dev->dev_pr_res_holder) {
1389 len = sprintf(page, "No SPC-3 Reservation holder\n");
1390 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1391 len = sprintf(page, "SPC-3 Reservation: All Target"
1392 " Ports registration\n");
1393 } else {
1394 len = sprintf(page, "SPC-3 Reservation: Single"
1395 " Target Port registration\n");
1396 }
1397
1398 spin_unlock(&dev->dev_reservation_lock);
1399 return len;
1400 }
1401
1402 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1403 char *page)
1404 {
1405 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1406 }
1407
1408
1409 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1410 char *page)
1411 {
1412 struct se_device *dev = pr_to_dev(item);
1413 struct se_node_acl *se_nacl;
1414 struct se_portal_group *se_tpg;
1415 struct t10_pr_registration *pr_reg;
1416 const struct target_core_fabric_ops *tfo;
1417 ssize_t len = 0;
1418
1419 spin_lock(&dev->dev_reservation_lock);
1420 pr_reg = dev->dev_pr_res_holder;
1421 if (!pr_reg) {
1422 len = sprintf(page, "No SPC-3 Reservation holder\n");
1423 goto out_unlock;
1424 }
1425
1426 se_nacl = pr_reg->pr_reg_nacl;
1427 se_tpg = se_nacl->se_tpg;
1428 tfo = se_tpg->se_tpg_tfo;
1429
1430 len += sprintf(page+len, "SPC-3 Reservation: %s"
1431 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1432 tfo->tpg_get_wwn(se_tpg));
1433 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1434 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1435 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1436 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1437 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1438
1439 out_unlock:
1440 spin_unlock(&dev->dev_reservation_lock);
1441 return len;
1442 }
1443
1444
1445 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1446 char *page)
1447 {
1448 struct se_device *dev = pr_to_dev(item);
1449 const struct target_core_fabric_ops *tfo;
1450 struct t10_pr_registration *pr_reg;
1451 unsigned char buf[384];
1452 char i_buf[PR_REG_ISID_ID_LEN];
1453 ssize_t len = 0;
1454 int reg_count = 0;
1455
1456 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1457
1458 spin_lock(&dev->t10_pr.registration_lock);
1459 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1460 pr_reg_list) {
1461
1462 memset(buf, 0, 384);
1463 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1464 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1465 core_pr_dump_initiator_port(pr_reg, i_buf,
1466 PR_REG_ISID_ID_LEN);
1467 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1468 tfo->get_fabric_name(),
1469 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1470 pr_reg->pr_res_generation);
1471
1472 if (len + strlen(buf) >= PAGE_SIZE)
1473 break;
1474
1475 len += sprintf(page+len, "%s", buf);
1476 reg_count++;
1477 }
1478 spin_unlock(&dev->t10_pr.registration_lock);
1479
1480 if (!reg_count)
1481 len += sprintf(page+len, "None\n");
1482
1483 return len;
1484 }
1485
1486 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1487 {
1488 struct se_device *dev = pr_to_dev(item);
1489 struct t10_pr_registration *pr_reg;
1490 ssize_t len = 0;
1491
1492 spin_lock(&dev->dev_reservation_lock);
1493 pr_reg = dev->dev_pr_res_holder;
1494 if (pr_reg) {
1495 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1496 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1497 } else {
1498 len = sprintf(page, "No SPC-3 Reservation holder\n");
1499 }
1500
1501 spin_unlock(&dev->dev_reservation_lock);
1502 return len;
1503 }
1504
1505 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1506 {
1507 struct se_device *dev = pr_to_dev(item);
1508
1509 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1510 return sprintf(page, "SPC_PASSTHROUGH\n");
1511 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1512 return sprintf(page, "SPC2_RESERVATIONS\n");
1513 else
1514 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1515 }
1516
1517 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1518 char *page)
1519 {
1520 struct se_device *dev = pr_to_dev(item);
1521
1522 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1523 return 0;
1524
1525 return sprintf(page, "APTPL Bit Status: %s\n",
1526 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1527 }
1528
1529 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1530 char *page)
1531 {
1532 struct se_device *dev = pr_to_dev(item);
1533
1534 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1535 return 0;
1536
1537 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1538 }
1539
1540 enum {
1541 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1542 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1543 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1544 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1545 };
1546
1547 static match_table_t tokens = {
1548 {Opt_initiator_fabric, "initiator_fabric=%s"},
1549 {Opt_initiator_node, "initiator_node=%s"},
1550 {Opt_initiator_sid, "initiator_sid=%s"},
1551 {Opt_sa_res_key, "sa_res_key=%s"},
1552 {Opt_res_holder, "res_holder=%d"},
1553 {Opt_res_type, "res_type=%d"},
1554 {Opt_res_scope, "res_scope=%d"},
1555 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1556 {Opt_mapped_lun, "mapped_lun=%lld"},
1557 {Opt_target_fabric, "target_fabric=%s"},
1558 {Opt_target_node, "target_node=%s"},
1559 {Opt_tpgt, "tpgt=%d"},
1560 {Opt_port_rtpi, "port_rtpi=%d"},
1561 {Opt_target_lun, "target_lun=%lld"},
1562 {Opt_err, NULL}
1563 };
1564
1565 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1566 const char *page, size_t count)
1567 {
1568 struct se_device *dev = pr_to_dev(item);
1569 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1570 unsigned char *t_fabric = NULL, *t_port = NULL;
1571 char *orig, *ptr, *opts;
1572 substring_t args[MAX_OPT_ARGS];
1573 unsigned long long tmp_ll;
1574 u64 sa_res_key = 0;
1575 u64 mapped_lun = 0, target_lun = 0;
1576 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1577 u16 tpgt = 0;
1578 u8 type = 0;
1579
1580 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1581 return count;
1582 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1583 return count;
1584
1585 if (dev->export_count) {
1586 pr_debug("Unable to process APTPL metadata while"
1587 " active fabric exports exist\n");
1588 return -EINVAL;
1589 }
1590
1591 opts = kstrdup(page, GFP_KERNEL);
1592 if (!opts)
1593 return -ENOMEM;
1594
1595 orig = opts;
1596 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1597 if (!*ptr)
1598 continue;
1599
1600 token = match_token(ptr, tokens, args);
1601 switch (token) {
1602 case Opt_initiator_fabric:
1603 i_fabric = match_strdup(args);
1604 if (!i_fabric) {
1605 ret = -ENOMEM;
1606 goto out;
1607 }
1608 break;
1609 case Opt_initiator_node:
1610 i_port = match_strdup(args);
1611 if (!i_port) {
1612 ret = -ENOMEM;
1613 goto out;
1614 }
1615 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1616 pr_err("APTPL metadata initiator_node="
1617 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1618 PR_APTPL_MAX_IPORT_LEN);
1619 ret = -EINVAL;
1620 break;
1621 }
1622 break;
1623 case Opt_initiator_sid:
1624 isid = match_strdup(args);
1625 if (!isid) {
1626 ret = -ENOMEM;
1627 goto out;
1628 }
1629 if (strlen(isid) >= PR_REG_ISID_LEN) {
1630 pr_err("APTPL metadata initiator_isid"
1631 "= exceeds PR_REG_ISID_LEN: %d\n",
1632 PR_REG_ISID_LEN);
1633 ret = -EINVAL;
1634 break;
1635 }
1636 break;
1637 case Opt_sa_res_key:
1638 ret = kstrtoull(args->from, 0, &tmp_ll);
1639 if (ret < 0) {
1640 pr_err("kstrtoull() failed for sa_res_key=\n");
1641 goto out;
1642 }
1643 sa_res_key = (u64)tmp_ll;
1644 break;
1645 /*
1646 * PR APTPL Metadata for Reservation
1647 */
1648 case Opt_res_holder:
1649 ret = match_int(args, &arg);
1650 if (ret)
1651 goto out;
1652 res_holder = arg;
1653 break;
1654 case Opt_res_type:
1655 ret = match_int(args, &arg);
1656 if (ret)
1657 goto out;
1658 type = (u8)arg;
1659 break;
1660 case Opt_res_scope:
1661 ret = match_int(args, &arg);
1662 if (ret)
1663 goto out;
1664 break;
1665 case Opt_res_all_tg_pt:
1666 ret = match_int(args, &arg);
1667 if (ret)
1668 goto out;
1669 all_tg_pt = (int)arg;
1670 break;
1671 case Opt_mapped_lun:
1672 ret = match_int(args, &arg);
1673 if (ret)
1674 goto out;
1675 mapped_lun = (u64)arg;
1676 break;
1677 /*
1678 * PR APTPL Metadata for Target Port
1679 */
1680 case Opt_target_fabric:
1681 t_fabric = match_strdup(args);
1682 if (!t_fabric) {
1683 ret = -ENOMEM;
1684 goto out;
1685 }
1686 break;
1687 case Opt_target_node:
1688 t_port = match_strdup(args);
1689 if (!t_port) {
1690 ret = -ENOMEM;
1691 goto out;
1692 }
1693 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1694 pr_err("APTPL metadata target_node="
1695 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1696 PR_APTPL_MAX_TPORT_LEN);
1697 ret = -EINVAL;
1698 break;
1699 }
1700 break;
1701 case Opt_tpgt:
1702 ret = match_int(args, &arg);
1703 if (ret)
1704 goto out;
1705 tpgt = (u16)arg;
1706 break;
1707 case Opt_port_rtpi:
1708 ret = match_int(args, &arg);
1709 if (ret)
1710 goto out;
1711 break;
1712 case Opt_target_lun:
1713 ret = match_int(args, &arg);
1714 if (ret)
1715 goto out;
1716 target_lun = (u64)arg;
1717 break;
1718 default:
1719 break;
1720 }
1721 }
1722
1723 if (!i_port || !t_port || !sa_res_key) {
1724 pr_err("Illegal parameters for APTPL registration\n");
1725 ret = -EINVAL;
1726 goto out;
1727 }
1728
1729 if (res_holder && !(type)) {
1730 pr_err("Illegal PR type: 0x%02x for reservation"
1731 " holder\n", type);
1732 ret = -EINVAL;
1733 goto out;
1734 }
1735
1736 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1737 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1738 res_holder, all_tg_pt, type);
1739 out:
1740 kfree(i_fabric);
1741 kfree(i_port);
1742 kfree(isid);
1743 kfree(t_fabric);
1744 kfree(t_port);
1745 kfree(orig);
1746 return (ret == 0) ? count : ret;
1747 }
1748
1749
1750 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1751 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1752 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1753 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1754 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1755 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1756 CONFIGFS_ATTR_RO(target_pr_, res_type);
1757 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1758 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1759
1760 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1761 &target_pr_attr_res_holder,
1762 &target_pr_attr_res_pr_all_tgt_pts,
1763 &target_pr_attr_res_pr_generation,
1764 &target_pr_attr_res_pr_holder_tg_port,
1765 &target_pr_attr_res_pr_registered_i_pts,
1766 &target_pr_attr_res_pr_type,
1767 &target_pr_attr_res_type,
1768 &target_pr_attr_res_aptpl_active,
1769 &target_pr_attr_res_aptpl_metadata,
1770 NULL,
1771 };
1772
1773 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1774
1775 /* End functions for struct config_item_type tb_dev_pr_cit */
1776
1777 /* Start functions for struct config_item_type tb_dev_cit */
1778
1779 static inline struct se_device *to_device(struct config_item *item)
1780 {
1781 return container_of(to_config_group(item), struct se_device, dev_group);
1782 }
1783
1784 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1785 {
1786 struct se_device *dev = to_device(item);
1787 int bl = 0;
1788 ssize_t read_bytes = 0;
1789
1790 transport_dump_dev_state(dev, page, &bl);
1791 read_bytes += bl;
1792 read_bytes += dev->transport->show_configfs_dev_params(dev,
1793 page+read_bytes);
1794 return read_bytes;
1795 }
1796
1797 static ssize_t target_dev_control_store(struct config_item *item,
1798 const char *page, size_t count)
1799 {
1800 struct se_device *dev = to_device(item);
1801
1802 return dev->transport->set_configfs_dev_params(dev, page, count);
1803 }
1804
1805 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1806 {
1807 struct se_device *dev = to_device(item);
1808
1809 if (!(dev->dev_flags & DF_USING_ALIAS))
1810 return 0;
1811
1812 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1813 }
1814
1815 static ssize_t target_dev_alias_store(struct config_item *item,
1816 const char *page, size_t count)
1817 {
1818 struct se_device *dev = to_device(item);
1819 struct se_hba *hba = dev->se_hba;
1820 ssize_t read_bytes;
1821
1822 if (count > (SE_DEV_ALIAS_LEN-1)) {
1823 pr_err("alias count: %d exceeds"
1824 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1825 SE_DEV_ALIAS_LEN-1);
1826 return -EINVAL;
1827 }
1828
1829 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1830 if (!read_bytes)
1831 return -EINVAL;
1832 if (dev->dev_alias[read_bytes - 1] == '\n')
1833 dev->dev_alias[read_bytes - 1] = '\0';
1834
1835 dev->dev_flags |= DF_USING_ALIAS;
1836
1837 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1838 config_item_name(&hba->hba_group.cg_item),
1839 config_item_name(&dev->dev_group.cg_item),
1840 dev->dev_alias);
1841
1842 return read_bytes;
1843 }
1844
1845 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1846 {
1847 struct se_device *dev = to_device(item);
1848
1849 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1850 return 0;
1851
1852 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1853 }
1854
1855 static ssize_t target_dev_udev_path_store(struct config_item *item,
1856 const char *page, size_t count)
1857 {
1858 struct se_device *dev = to_device(item);
1859 struct se_hba *hba = dev->se_hba;
1860 ssize_t read_bytes;
1861
1862 if (count > (SE_UDEV_PATH_LEN-1)) {
1863 pr_err("udev_path count: %d exceeds"
1864 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1865 SE_UDEV_PATH_LEN-1);
1866 return -EINVAL;
1867 }
1868
1869 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1870 "%s", page);
1871 if (!read_bytes)
1872 return -EINVAL;
1873 if (dev->udev_path[read_bytes - 1] == '\n')
1874 dev->udev_path[read_bytes - 1] = '\0';
1875
1876 dev->dev_flags |= DF_USING_UDEV_PATH;
1877
1878 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1879 config_item_name(&hba->hba_group.cg_item),
1880 config_item_name(&dev->dev_group.cg_item),
1881 dev->udev_path);
1882
1883 return read_bytes;
1884 }
1885
1886 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1887 {
1888 struct se_device *dev = to_device(item);
1889
1890 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1891 }
1892
1893 static ssize_t target_dev_enable_store(struct config_item *item,
1894 const char *page, size_t count)
1895 {
1896 struct se_device *dev = to_device(item);
1897 char *ptr;
1898 int ret;
1899
1900 ptr = strstr(page, "1");
1901 if (!ptr) {
1902 pr_err("For dev_enable ops, only valid value"
1903 " is \"1\"\n");
1904 return -EINVAL;
1905 }
1906
1907 ret = target_configure_device(dev);
1908 if (ret)
1909 return ret;
1910 return count;
1911 }
1912
1913 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1914 {
1915 struct se_device *dev = to_device(item);
1916 struct config_item *lu_ci;
1917 struct t10_alua_lu_gp *lu_gp;
1918 struct t10_alua_lu_gp_member *lu_gp_mem;
1919 ssize_t len = 0;
1920
1921 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1922 if (!lu_gp_mem)
1923 return 0;
1924
1925 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1926 lu_gp = lu_gp_mem->lu_gp;
1927 if (lu_gp) {
1928 lu_ci = &lu_gp->lu_gp_group.cg_item;
1929 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1930 config_item_name(lu_ci), lu_gp->lu_gp_id);
1931 }
1932 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1933
1934 return len;
1935 }
1936
1937 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1938 const char *page, size_t count)
1939 {
1940 struct se_device *dev = to_device(item);
1941 struct se_hba *hba = dev->se_hba;
1942 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1943 struct t10_alua_lu_gp_member *lu_gp_mem;
1944 unsigned char buf[LU_GROUP_NAME_BUF];
1945 int move = 0;
1946
1947 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1948 if (!lu_gp_mem)
1949 return count;
1950
1951 if (count > LU_GROUP_NAME_BUF) {
1952 pr_err("ALUA LU Group Alias too large!\n");
1953 return -EINVAL;
1954 }
1955 memset(buf, 0, LU_GROUP_NAME_BUF);
1956 memcpy(buf, page, count);
1957 /*
1958 * Any ALUA logical unit alias besides "NULL" means we will be
1959 * making a new group association.
1960 */
1961 if (strcmp(strstrip(buf), "NULL")) {
1962 /*
1963 * core_alua_get_lu_gp_by_name() will increment reference to
1964 * struct t10_alua_lu_gp. This reference is released with
1965 * core_alua_get_lu_gp_by_name below().
1966 */
1967 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1968 if (!lu_gp_new)
1969 return -ENODEV;
1970 }
1971
1972 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1973 lu_gp = lu_gp_mem->lu_gp;
1974 if (lu_gp) {
1975 /*
1976 * Clearing an existing lu_gp association, and replacing
1977 * with NULL
1978 */
1979 if (!lu_gp_new) {
1980 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1981 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1982 " %hu\n",
1983 config_item_name(&hba->hba_group.cg_item),
1984 config_item_name(&dev->dev_group.cg_item),
1985 config_item_name(&lu_gp->lu_gp_group.cg_item),
1986 lu_gp->lu_gp_id);
1987
1988 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1989 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1990
1991 return count;
1992 }
1993 /*
1994 * Removing existing association of lu_gp_mem with lu_gp
1995 */
1996 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1997 move = 1;
1998 }
1999 /*
2000 * Associate lu_gp_mem with lu_gp_new.
2001 */
2002 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2003 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2004
2005 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2006 " core/alua/lu_gps/%s, ID: %hu\n",
2007 (move) ? "Moving" : "Adding",
2008 config_item_name(&hba->hba_group.cg_item),
2009 config_item_name(&dev->dev_group.cg_item),
2010 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2011 lu_gp_new->lu_gp_id);
2012
2013 core_alua_put_lu_gp_from_name(lu_gp_new);
2014 return count;
2015 }
2016
2017 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2018 {
2019 struct se_device *dev = to_device(item);
2020 struct t10_alua_lba_map *map;
2021 struct t10_alua_lba_map_member *mem;
2022 char *b = page;
2023 int bl = 0;
2024 char state;
2025
2026 spin_lock(&dev->t10_alua.lba_map_lock);
2027 if (!list_empty(&dev->t10_alua.lba_map_list))
2028 bl += sprintf(b + bl, "%u %u\n",
2029 dev->t10_alua.lba_map_segment_size,
2030 dev->t10_alua.lba_map_segment_multiplier);
2031 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2032 bl += sprintf(b + bl, "%llu %llu",
2033 map->lba_map_first_lba, map->lba_map_last_lba);
2034 list_for_each_entry(mem, &map->lba_map_mem_list,
2035 lba_map_mem_list) {
2036 switch (mem->lba_map_mem_alua_state) {
2037 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2038 state = 'O';
2039 break;
2040 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2041 state = 'A';
2042 break;
2043 case ALUA_ACCESS_STATE_STANDBY:
2044 state = 'S';
2045 break;
2046 case ALUA_ACCESS_STATE_UNAVAILABLE:
2047 state = 'U';
2048 break;
2049 default:
2050 state = '.';
2051 break;
2052 }
2053 bl += sprintf(b + bl, " %d:%c",
2054 mem->lba_map_mem_alua_pg_id, state);
2055 }
2056 bl += sprintf(b + bl, "\n");
2057 }
2058 spin_unlock(&dev->t10_alua.lba_map_lock);
2059 return bl;
2060 }
2061
2062 static ssize_t target_dev_lba_map_store(struct config_item *item,
2063 const char *page, size_t count)
2064 {
2065 struct se_device *dev = to_device(item);
2066 struct t10_alua_lba_map *lba_map = NULL;
2067 struct list_head lba_list;
2068 char *map_entries, *orig, *ptr;
2069 char state;
2070 int pg_num = -1, pg;
2071 int ret = 0, num = 0, pg_id, alua_state;
2072 unsigned long start_lba = -1, end_lba = -1;
2073 unsigned long segment_size = -1, segment_mult = -1;
2074
2075 orig = map_entries = kstrdup(page, GFP_KERNEL);
2076 if (!map_entries)
2077 return -ENOMEM;
2078
2079 INIT_LIST_HEAD(&lba_list);
2080 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2081 if (!*ptr)
2082 continue;
2083
2084 if (num == 0) {
2085 if (sscanf(ptr, "%lu %lu\n",
2086 &segment_size, &segment_mult) != 2) {
2087 pr_err("Invalid line %d\n", num);
2088 ret = -EINVAL;
2089 break;
2090 }
2091 num++;
2092 continue;
2093 }
2094 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2095 pr_err("Invalid line %d\n", num);
2096 ret = -EINVAL;
2097 break;
2098 }
2099 ptr = strchr(ptr, ' ');
2100 if (!ptr) {
2101 pr_err("Invalid line %d, missing end lba\n", num);
2102 ret = -EINVAL;
2103 break;
2104 }
2105 ptr++;
2106 ptr = strchr(ptr, ' ');
2107 if (!ptr) {
2108 pr_err("Invalid line %d, missing state definitions\n",
2109 num);
2110 ret = -EINVAL;
2111 break;
2112 }
2113 ptr++;
2114 lba_map = core_alua_allocate_lba_map(&lba_list,
2115 start_lba, end_lba);
2116 if (IS_ERR(lba_map)) {
2117 ret = PTR_ERR(lba_map);
2118 break;
2119 }
2120 pg = 0;
2121 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2122 switch (state) {
2123 case 'O':
2124 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2125 break;
2126 case 'A':
2127 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2128 break;
2129 case 'S':
2130 alua_state = ALUA_ACCESS_STATE_STANDBY;
2131 break;
2132 case 'U':
2133 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2134 break;
2135 default:
2136 pr_err("Invalid ALUA state '%c'\n", state);
2137 ret = -EINVAL;
2138 goto out;
2139 }
2140
2141 ret = core_alua_allocate_lba_map_mem(lba_map,
2142 pg_id, alua_state);
2143 if (ret) {
2144 pr_err("Invalid target descriptor %d:%c "
2145 "at line %d\n",
2146 pg_id, state, num);
2147 break;
2148 }
2149 pg++;
2150 ptr = strchr(ptr, ' ');
2151 if (ptr)
2152 ptr++;
2153 else
2154 break;
2155 }
2156 if (pg_num == -1)
2157 pg_num = pg;
2158 else if (pg != pg_num) {
2159 pr_err("Only %d from %d port groups definitions "
2160 "at line %d\n", pg, pg_num, num);
2161 ret = -EINVAL;
2162 break;
2163 }
2164 num++;
2165 }
2166 out:
2167 if (ret) {
2168 core_alua_free_lba_map(&lba_list);
2169 count = ret;
2170 } else
2171 core_alua_set_lba_map(dev, &lba_list,
2172 segment_size, segment_mult);
2173 kfree(orig);
2174 return count;
2175 }
2176
2177 CONFIGFS_ATTR_RO(target_dev_, info);
2178 CONFIGFS_ATTR_WO(target_dev_, control);
2179 CONFIGFS_ATTR(target_dev_, alias);
2180 CONFIGFS_ATTR(target_dev_, udev_path);
2181 CONFIGFS_ATTR(target_dev_, enable);
2182 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2183 CONFIGFS_ATTR(target_dev_, lba_map);
2184
2185 static struct configfs_attribute *target_core_dev_attrs[] = {
2186 &target_dev_attr_info,
2187 &target_dev_attr_control,
2188 &target_dev_attr_alias,
2189 &target_dev_attr_udev_path,
2190 &target_dev_attr_enable,
2191 &target_dev_attr_alua_lu_gp,
2192 &target_dev_attr_lba_map,
2193 NULL,
2194 };
2195
2196 static void target_core_dev_release(struct config_item *item)
2197 {
2198 struct config_group *dev_cg = to_config_group(item);
2199 struct se_device *dev =
2200 container_of(dev_cg, struct se_device, dev_group);
2201
2202 target_free_device(dev);
2203 }
2204
2205 static struct configfs_item_operations target_core_dev_item_ops = {
2206 .release = target_core_dev_release,
2207 };
2208
2209 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2210
2211 /* End functions for struct config_item_type tb_dev_cit */
2212
2213 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2214
2215 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2216 {
2217 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2218 lu_gp_group);
2219 }
2220
2221 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2222 {
2223 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2224
2225 if (!lu_gp->lu_gp_valid_id)
2226 return 0;
2227 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2228 }
2229
2230 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2231 const char *page, size_t count)
2232 {
2233 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2234 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2235 unsigned long lu_gp_id;
2236 int ret;
2237
2238 ret = kstrtoul(page, 0, &lu_gp_id);
2239 if (ret < 0) {
2240 pr_err("kstrtoul() returned %d for"
2241 " lu_gp_id\n", ret);
2242 return ret;
2243 }
2244 if (lu_gp_id > 0x0000ffff) {
2245 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2246 " 0x0000ffff\n", lu_gp_id);
2247 return -EINVAL;
2248 }
2249
2250 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2251 if (ret < 0)
2252 return -EINVAL;
2253
2254 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2255 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2256 config_item_name(&alua_lu_gp_cg->cg_item),
2257 lu_gp->lu_gp_id);
2258
2259 return count;
2260 }
2261
2262 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2263 {
2264 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2265 struct se_device *dev;
2266 struct se_hba *hba;
2267 struct t10_alua_lu_gp_member *lu_gp_mem;
2268 ssize_t len = 0, cur_len;
2269 unsigned char buf[LU_GROUP_NAME_BUF];
2270
2271 memset(buf, 0, LU_GROUP_NAME_BUF);
2272
2273 spin_lock(&lu_gp->lu_gp_lock);
2274 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2275 dev = lu_gp_mem->lu_gp_mem_dev;
2276 hba = dev->se_hba;
2277
2278 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2279 config_item_name(&hba->hba_group.cg_item),
2280 config_item_name(&dev->dev_group.cg_item));
2281 cur_len++; /* Extra byte for NULL terminator */
2282
2283 if ((cur_len + len) > PAGE_SIZE) {
2284 pr_warn("Ran out of lu_gp_show_attr"
2285 "_members buffer\n");
2286 break;
2287 }
2288 memcpy(page+len, buf, cur_len);
2289 len += cur_len;
2290 }
2291 spin_unlock(&lu_gp->lu_gp_lock);
2292
2293 return len;
2294 }
2295
2296 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2297 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2298
2299 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2300 &target_lu_gp_attr_lu_gp_id,
2301 &target_lu_gp_attr_members,
2302 NULL,
2303 };
2304
2305 static void target_core_alua_lu_gp_release(struct config_item *item)
2306 {
2307 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2308 struct t10_alua_lu_gp, lu_gp_group);
2309
2310 core_alua_free_lu_gp(lu_gp);
2311 }
2312
2313 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2314 .release = target_core_alua_lu_gp_release,
2315 };
2316
2317 static struct config_item_type target_core_alua_lu_gp_cit = {
2318 .ct_item_ops = &target_core_alua_lu_gp_ops,
2319 .ct_attrs = target_core_alua_lu_gp_attrs,
2320 .ct_owner = THIS_MODULE,
2321 };
2322
2323 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2324
2325 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2326
2327 static struct config_group *target_core_alua_create_lu_gp(
2328 struct config_group *group,
2329 const char *name)
2330 {
2331 struct t10_alua_lu_gp *lu_gp;
2332 struct config_group *alua_lu_gp_cg = NULL;
2333 struct config_item *alua_lu_gp_ci = NULL;
2334
2335 lu_gp = core_alua_allocate_lu_gp(name, 0);
2336 if (IS_ERR(lu_gp))
2337 return NULL;
2338
2339 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2340 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2341
2342 config_group_init_type_name(alua_lu_gp_cg, name,
2343 &target_core_alua_lu_gp_cit);
2344
2345 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2346 " Group: core/alua/lu_gps/%s\n",
2347 config_item_name(alua_lu_gp_ci));
2348
2349 return alua_lu_gp_cg;
2350
2351 }
2352
2353 static void target_core_alua_drop_lu_gp(
2354 struct config_group *group,
2355 struct config_item *item)
2356 {
2357 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2358 struct t10_alua_lu_gp, lu_gp_group);
2359
2360 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2361 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2362 config_item_name(item), lu_gp->lu_gp_id);
2363 /*
2364 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2365 * -> target_core_alua_lu_gp_release()
2366 */
2367 config_item_put(item);
2368 }
2369
2370 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2371 .make_group = &target_core_alua_create_lu_gp,
2372 .drop_item = &target_core_alua_drop_lu_gp,
2373 };
2374
2375 static struct config_item_type target_core_alua_lu_gps_cit = {
2376 .ct_item_ops = NULL,
2377 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2378 .ct_owner = THIS_MODULE,
2379 };
2380
2381 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2382
2383 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2384
2385 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2386 {
2387 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2388 tg_pt_gp_group);
2389 }
2390
2391 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2392 char *page)
2393 {
2394 return sprintf(page, "%d\n",
2395 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2396 }
2397
2398 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2399 const char *page, size_t count)
2400 {
2401 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2402 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2403 unsigned long tmp;
2404 int new_state, ret;
2405
2406 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2407 pr_err("Unable to do implicit ALUA on non valid"
2408 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2409 return -EINVAL;
2410 }
2411 if (!(dev->dev_flags & DF_CONFIGURED)) {
2412 pr_err("Unable to set alua_access_state while device is"
2413 " not configured\n");
2414 return -ENODEV;
2415 }
2416
2417 ret = kstrtoul(page, 0, &tmp);
2418 if (ret < 0) {
2419 pr_err("Unable to extract new ALUA access state from"
2420 " %s\n", page);
2421 return ret;
2422 }
2423 new_state = (int)tmp;
2424
2425 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2426 pr_err("Unable to process implicit configfs ALUA"
2427 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2428 return -EINVAL;
2429 }
2430 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2431 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2432 /* LBA DEPENDENT is only allowed with implicit ALUA */
2433 pr_err("Unable to process implicit configfs ALUA transition"
2434 " while explicit ALUA management is enabled\n");
2435 return -EINVAL;
2436 }
2437
2438 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2439 NULL, NULL, new_state, 0);
2440 return (!ret) ? count : -EINVAL;
2441 }
2442
2443 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2444 char *page)
2445 {
2446 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2447 return sprintf(page, "%s\n",
2448 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2449 }
2450
2451 static ssize_t target_tg_pt_gp_alua_access_status_store(
2452 struct config_item *item, const char *page, size_t count)
2453 {
2454 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2455 unsigned long tmp;
2456 int new_status, ret;
2457
2458 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2459 pr_err("Unable to do set ALUA access status on non"
2460 " valid tg_pt_gp ID: %hu\n",
2461 tg_pt_gp->tg_pt_gp_valid_id);
2462 return -EINVAL;
2463 }
2464
2465 ret = kstrtoul(page, 0, &tmp);
2466 if (ret < 0) {
2467 pr_err("Unable to extract new ALUA access status"
2468 " from %s\n", page);
2469 return ret;
2470 }
2471 new_status = (int)tmp;
2472
2473 if ((new_status != ALUA_STATUS_NONE) &&
2474 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2475 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2476 pr_err("Illegal ALUA access status: 0x%02x\n",
2477 new_status);
2478 return -EINVAL;
2479 }
2480
2481 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2482 return count;
2483 }
2484
2485 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2486 char *page)
2487 {
2488 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2489 }
2490
2491 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2492 const char *page, size_t count)
2493 {
2494 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2495 }
2496
2497 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2498 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2499 struct config_item *item, char *p) \
2500 { \
2501 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2502 return sprintf(p, "%d\n", \
2503 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2504 } \
2505 \
2506 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2507 struct config_item *item, const char *p, size_t c) \
2508 { \
2509 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2510 unsigned long tmp; \
2511 int ret; \
2512 \
2513 if (!t->tg_pt_gp_valid_id) { \
2514 pr_err("Unable to do set ##_name ALUA state on non" \
2515 " valid tg_pt_gp ID: %hu\n", \
2516 t->tg_pt_gp_valid_id); \
2517 return -EINVAL; \
2518 } \
2519 \
2520 ret = kstrtoul(p, 0, &tmp); \
2521 if (ret < 0) { \
2522 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2523 return -EINVAL; \
2524 } \
2525 if (tmp > 1) { \
2526 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2527 return -EINVAL; \
2528 } \
2529 if (tmp) \
2530 t->tg_pt_gp_alua_supported_states |= _bit; \
2531 else \
2532 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2533 \
2534 return c; \
2535 }
2536
2537 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2538 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2539 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2540 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2541 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2542 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2543 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2544
2545 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2546 struct config_item *item, char *page)
2547 {
2548 return sprintf(page, "%d\n",
2549 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2550 }
2551
2552 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2553 struct config_item *item, const char *page, size_t count)
2554 {
2555 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2556 unsigned long tmp;
2557 int ret;
2558
2559 ret = kstrtoul(page, 0, &tmp);
2560 if (ret < 0) {
2561 pr_err("Unable to extract alua_write_metadata\n");
2562 return ret;
2563 }
2564
2565 if ((tmp != 0) && (tmp != 1)) {
2566 pr_err("Illegal value for alua_write_metadata:"
2567 " %lu\n", tmp);
2568 return -EINVAL;
2569 }
2570 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2571
2572 return count;
2573 }
2574
2575 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2576 char *page)
2577 {
2578 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2579 }
2580
2581 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2582 const char *page, size_t count)
2583 {
2584 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2585 count);
2586 }
2587
2588 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2589 char *page)
2590 {
2591 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2592 }
2593
2594 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2595 const char *page, size_t count)
2596 {
2597 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2598 count);
2599 }
2600
2601 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2602 struct config_item *item, char *page)
2603 {
2604 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2605 }
2606
2607 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2608 struct config_item *item, const char *page, size_t count)
2609 {
2610 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2611 count);
2612 }
2613
2614 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2615 char *page)
2616 {
2617 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2618 }
2619
2620 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2621 const char *page, size_t count)
2622 {
2623 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2624 }
2625
2626 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2627 char *page)
2628 {
2629 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2630
2631 if (!tg_pt_gp->tg_pt_gp_valid_id)
2632 return 0;
2633 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2634 }
2635
2636 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2637 const char *page, size_t count)
2638 {
2639 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2640 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2641 unsigned long tg_pt_gp_id;
2642 int ret;
2643
2644 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2645 if (ret < 0) {
2646 pr_err("kstrtoul() returned %d for"
2647 " tg_pt_gp_id\n", ret);
2648 return ret;
2649 }
2650 if (tg_pt_gp_id > 0x0000ffff) {
2651 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2652 " 0x0000ffff\n", tg_pt_gp_id);
2653 return -EINVAL;
2654 }
2655
2656 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2657 if (ret < 0)
2658 return -EINVAL;
2659
2660 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2661 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2662 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2663 tg_pt_gp->tg_pt_gp_id);
2664
2665 return count;
2666 }
2667
2668 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2669 char *page)
2670 {
2671 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2672 struct se_lun *lun;
2673 ssize_t len = 0, cur_len;
2674 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2675
2676 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2677
2678 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2679 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2680 lun_tg_pt_gp_link) {
2681 struct se_portal_group *tpg = lun->lun_tpg;
2682
2683 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2684 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2685 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2686 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2687 config_item_name(&lun->lun_group.cg_item));
2688 cur_len++; /* Extra byte for NULL terminator */
2689
2690 if ((cur_len + len) > PAGE_SIZE) {
2691 pr_warn("Ran out of lu_gp_show_attr"
2692 "_members buffer\n");
2693 break;
2694 }
2695 memcpy(page+len, buf, cur_len);
2696 len += cur_len;
2697 }
2698 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2699
2700 return len;
2701 }
2702
2703 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2704 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2705 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2706 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2707 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2708 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2709 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2710 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2711 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2712 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2713 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2714 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2715 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2716 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2717 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2718 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2719 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2720
2721 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2722 &target_tg_pt_gp_attr_alua_access_state,
2723 &target_tg_pt_gp_attr_alua_access_status,
2724 &target_tg_pt_gp_attr_alua_access_type,
2725 &target_tg_pt_gp_attr_alua_support_transitioning,
2726 &target_tg_pt_gp_attr_alua_support_offline,
2727 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2728 &target_tg_pt_gp_attr_alua_support_unavailable,
2729 &target_tg_pt_gp_attr_alua_support_standby,
2730 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2731 &target_tg_pt_gp_attr_alua_support_active_optimized,
2732 &target_tg_pt_gp_attr_alua_write_metadata,
2733 &target_tg_pt_gp_attr_nonop_delay_msecs,
2734 &target_tg_pt_gp_attr_trans_delay_msecs,
2735 &target_tg_pt_gp_attr_implicit_trans_secs,
2736 &target_tg_pt_gp_attr_preferred,
2737 &target_tg_pt_gp_attr_tg_pt_gp_id,
2738 &target_tg_pt_gp_attr_members,
2739 NULL,
2740 };
2741
2742 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2743 {
2744 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2745 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2746
2747 core_alua_free_tg_pt_gp(tg_pt_gp);
2748 }
2749
2750 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2751 .release = target_core_alua_tg_pt_gp_release,
2752 };
2753
2754 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2755 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2756 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2757 .ct_owner = THIS_MODULE,
2758 };
2759
2760 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2761
2762 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2763
2764 static struct config_group *target_core_alua_create_tg_pt_gp(
2765 struct config_group *group,
2766 const char *name)
2767 {
2768 struct t10_alua *alua = container_of(group, struct t10_alua,
2769 alua_tg_pt_gps_group);
2770 struct t10_alua_tg_pt_gp *tg_pt_gp;
2771 struct config_group *alua_tg_pt_gp_cg = NULL;
2772 struct config_item *alua_tg_pt_gp_ci = NULL;
2773
2774 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2775 if (!tg_pt_gp)
2776 return NULL;
2777
2778 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2779 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2780
2781 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2782 &target_core_alua_tg_pt_gp_cit);
2783
2784 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2785 " Group: alua/tg_pt_gps/%s\n",
2786 config_item_name(alua_tg_pt_gp_ci));
2787
2788 return alua_tg_pt_gp_cg;
2789 }
2790
2791 static void target_core_alua_drop_tg_pt_gp(
2792 struct config_group *group,
2793 struct config_item *item)
2794 {
2795 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2796 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2797
2798 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2799 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2800 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2801 /*
2802 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2803 * -> target_core_alua_tg_pt_gp_release().
2804 */
2805 config_item_put(item);
2806 }
2807
2808 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2809 .make_group = &target_core_alua_create_tg_pt_gp,
2810 .drop_item = &target_core_alua_drop_tg_pt_gp,
2811 };
2812
2813 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2814
2815 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2816
2817 /* Start functions for struct config_item_type target_core_alua_cit */
2818
2819 /*
2820 * target_core_alua_cit is a ConfigFS group that lives under
2821 * /sys/kernel/config/target/core/alua. There are default groups
2822 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2823 * target_core_alua_cit in target_core_init_configfs() below.
2824 */
2825 static struct config_item_type target_core_alua_cit = {
2826 .ct_item_ops = NULL,
2827 .ct_attrs = NULL,
2828 .ct_owner = THIS_MODULE,
2829 };
2830
2831 /* End functions for struct config_item_type target_core_alua_cit */
2832
2833 /* Start functions for struct config_item_type tb_dev_stat_cit */
2834
2835 static struct config_group *target_core_stat_mkdir(
2836 struct config_group *group,
2837 const char *name)
2838 {
2839 return ERR_PTR(-ENOSYS);
2840 }
2841
2842 static void target_core_stat_rmdir(
2843 struct config_group *group,
2844 struct config_item *item)
2845 {
2846 return;
2847 }
2848
2849 static struct configfs_group_operations target_core_stat_group_ops = {
2850 .make_group = &target_core_stat_mkdir,
2851 .drop_item = &target_core_stat_rmdir,
2852 };
2853
2854 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2855
2856 /* End functions for struct config_item_type tb_dev_stat_cit */
2857
2858 /* Start functions for struct config_item_type target_core_hba_cit */
2859
2860 static struct config_group *target_core_make_subdev(
2861 struct config_group *group,
2862 const char *name)
2863 {
2864 struct t10_alua_tg_pt_gp *tg_pt_gp;
2865 struct config_item *hba_ci = &group->cg_item;
2866 struct se_hba *hba = item_to_hba(hba_ci);
2867 struct target_backend *tb = hba->backend;
2868 struct se_device *dev;
2869 int errno = -ENOMEM, ret;
2870
2871 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2872 if (ret)
2873 return ERR_PTR(ret);
2874
2875 dev = target_alloc_device(hba, name);
2876 if (!dev)
2877 goto out_unlock;
2878
2879 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2880
2881 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2882 &tb->tb_dev_attrib_cit);
2883 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2884
2885 config_group_init_type_name(&dev->dev_pr_group, "pr",
2886 &tb->tb_dev_pr_cit);
2887 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2888
2889 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2890 &tb->tb_dev_wwn_cit);
2891 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2892 &dev->dev_group);
2893
2894 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2895 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2896 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2897 &dev->dev_group);
2898
2899 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2900 "statistics", &tb->tb_dev_stat_cit);
2901 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2902 &dev->dev_group);
2903
2904 /*
2905 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2906 */
2907 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2908 if (!tg_pt_gp)
2909 goto out_free_device;
2910 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2911
2912 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2913 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2914 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2915 &dev->t10_alua.alua_tg_pt_gps_group);
2916
2917 /*
2918 * Add core/$HBA/$DEV/statistics/ default groups
2919 */
2920 target_stat_setup_dev_default_groups(dev);
2921
2922 mutex_unlock(&hba->hba_access_mutex);
2923 return &dev->dev_group;
2924
2925 out_free_device:
2926 target_free_device(dev);
2927 out_unlock:
2928 mutex_unlock(&hba->hba_access_mutex);
2929 return ERR_PTR(errno);
2930 }
2931
2932 static void target_core_drop_subdev(
2933 struct config_group *group,
2934 struct config_item *item)
2935 {
2936 struct config_group *dev_cg = to_config_group(item);
2937 struct se_device *dev =
2938 container_of(dev_cg, struct se_device, dev_group);
2939 struct se_hba *hba;
2940
2941 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2942
2943 mutex_lock(&hba->hba_access_mutex);
2944
2945 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
2946 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
2947
2948 /*
2949 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2950 * directly from target_core_alua_tg_pt_gp_release().
2951 */
2952 dev->t10_alua.default_tg_pt_gp = NULL;
2953
2954 configfs_remove_default_groups(dev_cg);
2955
2956 /*
2957 * se_dev is released from target_core_dev_item_ops->release()
2958 */
2959 config_item_put(item);
2960 mutex_unlock(&hba->hba_access_mutex);
2961 }
2962
2963 static struct configfs_group_operations target_core_hba_group_ops = {
2964 .make_group = target_core_make_subdev,
2965 .drop_item = target_core_drop_subdev,
2966 };
2967
2968
2969 static inline struct se_hba *to_hba(struct config_item *item)
2970 {
2971 return container_of(to_config_group(item), struct se_hba, hba_group);
2972 }
2973
2974 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2975 {
2976 struct se_hba *hba = to_hba(item);
2977
2978 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2979 hba->hba_id, hba->backend->ops->name,
2980 TARGET_CORE_VERSION);
2981 }
2982
2983 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2984 {
2985 struct se_hba *hba = to_hba(item);
2986 int hba_mode = 0;
2987
2988 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2989 hba_mode = 1;
2990
2991 return sprintf(page, "%d\n", hba_mode);
2992 }
2993
2994 static ssize_t target_hba_mode_store(struct config_item *item,
2995 const char *page, size_t count)
2996 {
2997 struct se_hba *hba = to_hba(item);
2998 unsigned long mode_flag;
2999 int ret;
3000
3001 if (hba->backend->ops->pmode_enable_hba == NULL)
3002 return -EINVAL;
3003
3004 ret = kstrtoul(page, 0, &mode_flag);
3005 if (ret < 0) {
3006 pr_err("Unable to extract hba mode flag: %d\n", ret);
3007 return ret;
3008 }
3009
3010 if (hba->dev_count) {
3011 pr_err("Unable to set hba_mode with active devices\n");
3012 return -EINVAL;
3013 }
3014
3015 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3016 if (ret < 0)
3017 return -EINVAL;
3018 if (ret > 0)
3019 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3020 else if (ret == 0)
3021 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3022
3023 return count;
3024 }
3025
3026 CONFIGFS_ATTR_RO(target_, hba_info);
3027 CONFIGFS_ATTR(target_, hba_mode);
3028
3029 static void target_core_hba_release(struct config_item *item)
3030 {
3031 struct se_hba *hba = container_of(to_config_group(item),
3032 struct se_hba, hba_group);
3033 core_delete_hba(hba);
3034 }
3035
3036 static struct configfs_attribute *target_core_hba_attrs[] = {
3037 &target_attr_hba_info,
3038 &target_attr_hba_mode,
3039 NULL,
3040 };
3041
3042 static struct configfs_item_operations target_core_hba_item_ops = {
3043 .release = target_core_hba_release,
3044 };
3045
3046 static struct config_item_type target_core_hba_cit = {
3047 .ct_item_ops = &target_core_hba_item_ops,
3048 .ct_group_ops = &target_core_hba_group_ops,
3049 .ct_attrs = target_core_hba_attrs,
3050 .ct_owner = THIS_MODULE,
3051 };
3052
3053 static struct config_group *target_core_call_addhbatotarget(
3054 struct config_group *group,
3055 const char *name)
3056 {
3057 char *se_plugin_str, *str, *str2;
3058 struct se_hba *hba;
3059 char buf[TARGET_CORE_NAME_MAX_LEN];
3060 unsigned long plugin_dep_id = 0;
3061 int ret;
3062
3063 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3064 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3065 pr_err("Passed *name strlen(): %d exceeds"
3066 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3067 TARGET_CORE_NAME_MAX_LEN);
3068 return ERR_PTR(-ENAMETOOLONG);
3069 }
3070 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3071
3072 str = strstr(buf, "_");
3073 if (!str) {
3074 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3075 return ERR_PTR(-EINVAL);
3076 }
3077 se_plugin_str = buf;
3078 /*
3079 * Special case for subsystem plugins that have "_" in their names.
3080 * Namely rd_direct and rd_mcp..
3081 */
3082 str2 = strstr(str+1, "_");
3083 if (str2) {
3084 *str2 = '\0'; /* Terminate for *se_plugin_str */
3085 str2++; /* Skip to start of plugin dependent ID */
3086 str = str2;
3087 } else {
3088 *str = '\0'; /* Terminate for *se_plugin_str */
3089 str++; /* Skip to start of plugin dependent ID */
3090 }
3091
3092 ret = kstrtoul(str, 0, &plugin_dep_id);
3093 if (ret < 0) {
3094 pr_err("kstrtoul() returned %d for"
3095 " plugin_dep_id\n", ret);
3096 return ERR_PTR(ret);
3097 }
3098 /*
3099 * Load up TCM subsystem plugins if they have not already been loaded.
3100 */
3101 transport_subsystem_check_init();
3102
3103 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3104 if (IS_ERR(hba))
3105 return ERR_CAST(hba);
3106
3107 config_group_init_type_name(&hba->hba_group, name,
3108 &target_core_hba_cit);
3109
3110 return &hba->hba_group;
3111 }
3112
3113 static void target_core_call_delhbafromtarget(
3114 struct config_group *group,
3115 struct config_item *item)
3116 {
3117 /*
3118 * core_delete_hba() is called from target_core_hba_item_ops->release()
3119 * -> target_core_hba_release()
3120 */
3121 config_item_put(item);
3122 }
3123
3124 static struct configfs_group_operations target_core_group_ops = {
3125 .make_group = target_core_call_addhbatotarget,
3126 .drop_item = target_core_call_delhbafromtarget,
3127 };
3128
3129 static struct config_item_type target_core_cit = {
3130 .ct_item_ops = NULL,
3131 .ct_group_ops = &target_core_group_ops,
3132 .ct_attrs = NULL,
3133 .ct_owner = THIS_MODULE,
3134 };
3135
3136 /* Stop functions for struct config_item_type target_core_hba_cit */
3137
3138 void target_setup_backend_cits(struct target_backend *tb)
3139 {
3140 target_core_setup_dev_cit(tb);
3141 target_core_setup_dev_attrib_cit(tb);
3142 target_core_setup_dev_pr_cit(tb);
3143 target_core_setup_dev_wwn_cit(tb);
3144 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3145 target_core_setup_dev_stat_cit(tb);
3146 }
3147
3148 static int __init target_core_init_configfs(void)
3149 {
3150 struct configfs_subsystem *subsys = &target_core_fabrics;
3151 struct t10_alua_lu_gp *lu_gp;
3152 int ret;
3153
3154 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3155 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3156 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3157
3158 config_group_init(&subsys->su_group);
3159 mutex_init(&subsys->su_mutex);
3160
3161 ret = init_se_kmem_caches();
3162 if (ret < 0)
3163 return ret;
3164 /*
3165 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3166 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3167 */
3168 config_group_init_type_name(&target_core_hbagroup, "core",
3169 &target_core_cit);
3170 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3171
3172 /*
3173 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3174 */
3175 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3176 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3177
3178 /*
3179 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3180 * groups under /sys/kernel/config/target/core/alua/
3181 */
3182 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3183 &target_core_alua_lu_gps_cit);
3184 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3185
3186 /*
3187 * Add core/alua/lu_gps/default_lu_gp
3188 */
3189 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3190 if (IS_ERR(lu_gp)) {
3191 ret = -ENOMEM;
3192 goto out_global;
3193 }
3194
3195 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3196 &target_core_alua_lu_gp_cit);
3197 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3198
3199 default_lu_gp = lu_gp;
3200
3201 /*
3202 * Register the target_core_mod subsystem with configfs.
3203 */
3204 ret = configfs_register_subsystem(subsys);
3205 if (ret < 0) {
3206 pr_err("Error %d while registering subsystem %s\n",
3207 ret, subsys->su_group.cg_item.ci_namebuf);
3208 goto out_global;
3209 }
3210 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3211 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3212 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3213 /*
3214 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3215 */
3216 ret = rd_module_init();
3217 if (ret < 0)
3218 goto out;
3219
3220 ret = core_dev_setup_virtual_lun0();
3221 if (ret < 0)
3222 goto out;
3223
3224 ret = target_xcopy_setup_pt();
3225 if (ret < 0)
3226 goto out;
3227
3228 return 0;
3229
3230 out:
3231 configfs_unregister_subsystem(subsys);
3232 core_dev_release_virtual_lun0();
3233 rd_module_exit();
3234 out_global:
3235 if (default_lu_gp) {
3236 core_alua_free_lu_gp(default_lu_gp);
3237 default_lu_gp = NULL;
3238 }
3239 release_se_kmem_caches();
3240 return ret;
3241 }
3242
3243 static void __exit target_core_exit_configfs(void)
3244 {
3245 configfs_remove_default_groups(&alua_lu_gps_group);
3246 configfs_remove_default_groups(&alua_group);
3247 configfs_remove_default_groups(&target_core_hbagroup);
3248
3249 /*
3250 * We expect subsys->su_group.default_groups to be released
3251 * by configfs subsystem provider logic..
3252 */
3253 configfs_unregister_subsystem(&target_core_fabrics);
3254
3255 core_alua_free_lu_gp(default_lu_gp);
3256 default_lu_gp = NULL;
3257
3258 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3259 " Infrastructure\n");
3260
3261 core_dev_release_virtual_lun0();
3262 rd_module_exit();
3263 target_xcopy_release_pt();
3264 release_se_kmem_caches();
3265 }
3266
3267 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3268 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3269 MODULE_LICENSE("GPL");
3270
3271 module_init(target_core_init_configfs);
3272 module_exit(target_core_exit_configfs);
Linux with added FPC-III support