]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - drivers/target/target_core_configfs.c
projects / mirror_ubuntu-bionic-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ASoC: wm_adsp: add support for DSP region lock
[mirror_ubuntu-bionic-kernel.git] / drivers / target / target_core_configfs.c
1 /*******************************************************************************
2 * Filename: target_core_configfs.c
3 *
4 * This file contains ConfigFS logic for the Generic Target Engine project.
5 *
6 * (c) Copyright 2008-2013 Datera, Inc.
7 *
8 * Nicholas A. Bellinger <nab@kernel.org>
9 *
10 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 ****************************************************************************/
22
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <generated/utsrelease.h>
26 #include <linux/utsname.h>
27 #include <linux/init.h>
28 #include <linux/fs.h>
29 #include <linux/namei.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/delay.h>
33 #include <linux/unistd.h>
34 #include <linux/string.h>
35 #include <linux/parser.h>
36 #include <linux/syscalls.h>
37 #include <linux/configfs.h>
38 #include <linux/spinlock.h>
39
40 #include <target/target_core_base.h>
41 #include <target/target_core_backend.h>
42 #include <target/target_core_fabric.h>
43
44 #include "target_core_internal.h"
45 #include "target_core_alua.h"
46 #include "target_core_pr.h"
47 #include "target_core_rd.h"
48 #include "target_core_xcopy.h"
49
50 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
51 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
52 { \
53 struct config_item_type *cit = &tb->tb_##_name##_cit; \
54 \
55 cit->ct_item_ops = _item_ops; \
56 cit->ct_group_ops = _group_ops; \
57 cit->ct_attrs = _attrs; \
58 cit->ct_owner = tb->ops->owner; \
59 pr_debug("Setup generic %s\n", __stringify(_name)); \
60 }
61
62 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
63 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
64 { \
65 struct config_item_type *cit = &tb->tb_##_name##_cit; \
66 \
67 cit->ct_item_ops = _item_ops; \
68 cit->ct_group_ops = _group_ops; \
69 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
70 cit->ct_owner = tb->ops->owner; \
71 pr_debug("Setup generic %s\n", __stringify(_name)); \
72 }
73
74 extern struct t10_alua_lu_gp *default_lu_gp;
75
76 static LIST_HEAD(g_tf_list);
77 static DEFINE_MUTEX(g_tf_lock);
78
79 static struct config_group target_core_hbagroup;
80 static struct config_group alua_group;
81 static struct config_group alua_lu_gps_group;
82
83 static inline struct se_hba *
84 item_to_hba(struct config_item *item)
85 {
86 return container_of(to_config_group(item), struct se_hba, hba_group);
87 }
88
89 /*
90 * Attributes for /sys/kernel/config/target/
91 */
92 static ssize_t target_core_item_version_show(struct config_item *item,
93 char *page)
94 {
95 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
96 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
97 utsname()->sysname, utsname()->machine);
98 }
99
100 CONFIGFS_ATTR_RO(target_core_item_, version);
101
102 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
103 static char db_root_stage[DB_ROOT_LEN];
104
105 static ssize_t target_core_item_dbroot_show(struct config_item *item,
106 char *page)
107 {
108 return sprintf(page, "%s\n", db_root);
109 }
110
111 static ssize_t target_core_item_dbroot_store(struct config_item *item,
112 const char *page, size_t count)
113 {
114 ssize_t read_bytes;
115 struct file *fp;
116
117 mutex_lock(&g_tf_lock);
118 if (!list_empty(&g_tf_list)) {
119 mutex_unlock(&g_tf_lock);
120 pr_err("db_root: cannot be changed: target drivers registered");
121 return -EINVAL;
122 }
123
124 if (count > (DB_ROOT_LEN - 1)) {
125 mutex_unlock(&g_tf_lock);
126 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
127 (int)count, DB_ROOT_LEN - 1);
128 return -EINVAL;
129 }
130
131 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
132 if (!read_bytes) {
133 mutex_unlock(&g_tf_lock);
134 return -EINVAL;
135 }
136 if (db_root_stage[read_bytes - 1] == '\n')
137 db_root_stage[read_bytes - 1] = '\0';
138
139 /* validate new db root before accepting it */
140 fp = filp_open(db_root_stage, O_RDONLY, 0);
141 if (IS_ERR(fp)) {
142 mutex_unlock(&g_tf_lock);
143 pr_err("db_root: cannot open: %s\n", db_root_stage);
144 return -EINVAL;
145 }
146 if (!S_ISDIR(file_inode(fp)->i_mode)) {
147 filp_close(fp, NULL);
148 mutex_unlock(&g_tf_lock);
149 pr_err("db_root: not a directory: %s\n", db_root_stage);
150 return -EINVAL;
151 }
152 filp_close(fp, NULL);
153
154 strncpy(db_root, db_root_stage, read_bytes);
155
156 mutex_unlock(&g_tf_lock);
157
158 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 /*
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
428 */
429 if (!tfo->fabric_make_wwn) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
431 return -EINVAL;
432 }
433 if (!tfo->fabric_drop_wwn) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
435 return -EINVAL;
436 }
437 if (!tfo->fabric_make_tpg) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fabric_drop_tpg) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
443 return -EINVAL;
444 }
445
446 return 0;
447 }
448
449 int target_register_template(const struct target_core_fabric_ops *fo)
450 {
451 struct target_fabric_configfs *tf;
452 int ret;
453
454 ret = target_fabric_tf_ops_check(fo);
455 if (ret)
456 return ret;
457
458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
459 if (!tf) {
460 pr_err("%s: could not allocate memory!\n", __func__);
461 return -ENOMEM;
462 }
463
464 INIT_LIST_HEAD(&tf->tf_list);
465 atomic_set(&tf->tf_access_cnt, 0);
466 tf->tf_ops = fo;
467 target_fabric_setup_cits(tf);
468
469 mutex_lock(&g_tf_lock);
470 list_add_tail(&tf->tf_list, &g_tf_list);
471 mutex_unlock(&g_tf_lock);
472
473 return 0;
474 }
475 EXPORT_SYMBOL(target_register_template);
476
477 void target_unregister_template(const struct target_core_fabric_ops *fo)
478 {
479 struct target_fabric_configfs *t;
480
481 mutex_lock(&g_tf_lock);
482 list_for_each_entry(t, &g_tf_list, tf_list) {
483 if (!strcmp(t->tf_ops->name, fo->name)) {
484 BUG_ON(atomic_read(&t->tf_access_cnt));
485 list_del(&t->tf_list);
486 mutex_unlock(&g_tf_lock);
487 /*
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
491 */
492 rcu_barrier();
493 kfree(t);
494 return;
495 }
496 }
497 mutex_unlock(&g_tf_lock);
498 }
499 EXPORT_SYMBOL(target_unregister_template);
500
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
504
505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
506 {
507 return container_of(to_config_group(item), struct se_dev_attrib,
508 da_group);
509 }
510
511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513 static ssize_t _name##_show(struct config_item *item, char *page) \
514 { \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
516 }
517
518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
529 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
530 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
532 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
533 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
534 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
535 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
536 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
537 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
538 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
539 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
540 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
541 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
542 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
544 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
547 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
548
549 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
550 static ssize_t _name##_store(struct config_item *item, const char *page,\
551 size_t count) \
552 { \
553 struct se_dev_attrib *da = to_attrib(item); \
554 u32 val; \
555 int ret; \
556 \
557 ret = kstrtou32(page, 0, &val); \
558 if (ret < 0) \
559 return ret; \
560 da->_name = val; \
561 return count; \
562 }
563
564 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
566 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
569
570 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
571 static ssize_t _name##_store(struct config_item *item, const char *page, \
572 size_t count) \
573 { \
574 struct se_dev_attrib *da = to_attrib(item); \
575 bool flag; \
576 int ret; \
577 \
578 ret = strtobool(page, &flag); \
579 if (ret < 0) \
580 return ret; \
581 da->_name = flag; \
582 return count; \
583 }
584
585 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
590
591 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
592 static ssize_t _name##_store(struct config_item *item, const char *page,\
593 size_t count) \
594 { \
595 printk_once(KERN_WARNING \
596 "ignoring deprecated %s attribute\n", \
597 __stringify(_name)); \
598 return count; \
599 }
600
601 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
602 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
603
604 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
605 {
606 const char *configname;
607
608 configname = config_item_name(&dev->dev_group.cg_item);
609 if (strlen(configname) >= 16) {
610 pr_warn("dev[%p]: Backstore name '%s' is too long for "
611 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
612 configname);
613 }
614 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
615 }
616
617 static ssize_t emulate_model_alias_store(struct config_item *item,
618 const char *page, size_t count)
619 {
620 struct se_dev_attrib *da = to_attrib(item);
621 struct se_device *dev = da->da_dev;
622 bool flag;
623 int ret;
624
625 if (dev->export_count) {
626 pr_err("dev[%p]: Unable to change model alias"
627 " while export_count is %d\n",
628 dev, dev->export_count);
629 return -EINVAL;
630 }
631
632 ret = strtobool(page, &flag);
633 if (ret < 0)
634 return ret;
635
636 if (flag) {
637 dev_set_t10_wwn_model_alias(dev);
638 } else {
639 strncpy(&dev->t10_wwn.model[0],
640 dev->transport->inquiry_prod, 16);
641 }
642 da->emulate_model_alias = flag;
643 return count;
644 }
645
646 static ssize_t emulate_write_cache_store(struct config_item *item,
647 const char *page, size_t count)
648 {
649 struct se_dev_attrib *da = to_attrib(item);
650 bool flag;
651 int ret;
652
653 ret = strtobool(page, &flag);
654 if (ret < 0)
655 return ret;
656
657 if (flag && da->da_dev->transport->get_write_cache) {
658 pr_err("emulate_write_cache not supported for this device\n");
659 return -EINVAL;
660 }
661
662 da->emulate_write_cache = flag;
663 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
664 da->da_dev, flag);
665 return count;
666 }
667
668 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
669 const char *page, size_t count)
670 {
671 struct se_dev_attrib *da = to_attrib(item);
672 u32 val;
673 int ret;
674
675 ret = kstrtou32(page, 0, &val);
676 if (ret < 0)
677 return ret;
678
679 if (val != 0 && val != 1 && val != 2) {
680 pr_err("Illegal value %d\n", val);
681 return -EINVAL;
682 }
683
684 if (da->da_dev->export_count) {
685 pr_err("dev[%p]: Unable to change SE Device"
686 " UA_INTRLCK_CTRL while export_count is %d\n",
687 da->da_dev, da->da_dev->export_count);
688 return -EINVAL;
689 }
690 da->emulate_ua_intlck_ctrl = val;
691 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
692 da->da_dev, val);
693 return count;
694 }
695
696 static ssize_t emulate_tas_store(struct config_item *item,
697 const char *page, size_t count)
698 {
699 struct se_dev_attrib *da = to_attrib(item);
700 bool flag;
701 int ret;
702
703 ret = strtobool(page, &flag);
704 if (ret < 0)
705 return ret;
706
707 if (da->da_dev->export_count) {
708 pr_err("dev[%p]: Unable to change SE Device TAS while"
709 " export_count is %d\n",
710 da->da_dev, da->da_dev->export_count);
711 return -EINVAL;
712 }
713 da->emulate_tas = flag;
714 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
715 da->da_dev, flag ? "Enabled" : "Disabled");
716
717 return count;
718 }
719
720 static ssize_t emulate_tpu_store(struct config_item *item,
721 const char *page, size_t count)
722 {
723 struct se_dev_attrib *da = to_attrib(item);
724 bool flag;
725 int ret;
726
727 ret = strtobool(page, &flag);
728 if (ret < 0)
729 return ret;
730
731 /*
732 * We expect this value to be non-zero when generic Block Layer
733 * Discard supported is detected iblock_create_virtdevice().
734 */
735 if (flag && !da->max_unmap_block_desc_count) {
736 pr_err("Generic Block Discard not supported\n");
737 return -ENOSYS;
738 }
739
740 da->emulate_tpu = flag;
741 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
742 da->da_dev, flag);
743 return count;
744 }
745
746 static ssize_t emulate_tpws_store(struct config_item *item,
747 const char *page, size_t count)
748 {
749 struct se_dev_attrib *da = to_attrib(item);
750 bool flag;
751 int ret;
752
753 ret = strtobool(page, &flag);
754 if (ret < 0)
755 return ret;
756
757 /*
758 * We expect this value to be non-zero when generic Block Layer
759 * Discard supported is detected iblock_create_virtdevice().
760 */
761 if (flag && !da->max_unmap_block_desc_count) {
762 pr_err("Generic Block Discard not supported\n");
763 return -ENOSYS;
764 }
765
766 da->emulate_tpws = flag;
767 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
768 da->da_dev, flag);
769 return count;
770 }
771
772 static ssize_t pi_prot_type_store(struct config_item *item,
773 const char *page, size_t count)
774 {
775 struct se_dev_attrib *da = to_attrib(item);
776 int old_prot = da->pi_prot_type, ret;
777 struct se_device *dev = da->da_dev;
778 u32 flag;
779
780 ret = kstrtou32(page, 0, &flag);
781 if (ret < 0)
782 return ret;
783
784 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
785 pr_err("Illegal value %d for pi_prot_type\n", flag);
786 return -EINVAL;
787 }
788 if (flag == 2) {
789 pr_err("DIF TYPE2 protection currently not supported\n");
790 return -ENOSYS;
791 }
792 if (da->hw_pi_prot_type) {
793 pr_warn("DIF protection enabled on underlying hardware,"
794 " ignoring\n");
795 return count;
796 }
797 if (!dev->transport->init_prot || !dev->transport->free_prot) {
798 /* 0 is only allowed value for non-supporting backends */
799 if (flag == 0)
800 return count;
801
802 pr_err("DIF protection not supported by backend: %s\n",
803 dev->transport->name);
804 return -ENOSYS;
805 }
806 if (!(dev->dev_flags & DF_CONFIGURED)) {
807 pr_err("DIF protection requires device to be configured\n");
808 return -ENODEV;
809 }
810 if (dev->export_count) {
811 pr_err("dev[%p]: Unable to change SE Device PROT type while"
812 " export_count is %d\n", dev, dev->export_count);
813 return -EINVAL;
814 }
815
816 da->pi_prot_type = flag;
817
818 if (flag && !old_prot) {
819 ret = dev->transport->init_prot(dev);
820 if (ret) {
821 da->pi_prot_type = old_prot;
822 return ret;
823 }
824
825 } else if (!flag && old_prot) {
826 dev->transport->free_prot(dev);
827 }
828
829 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
830 return count;
831 }
832
833 static ssize_t pi_prot_format_store(struct config_item *item,
834 const char *page, size_t count)
835 {
836 struct se_dev_attrib *da = to_attrib(item);
837 struct se_device *dev = da->da_dev;
838 bool flag;
839 int ret;
840
841 ret = strtobool(page, &flag);
842 if (ret < 0)
843 return ret;
844
845 if (!flag)
846 return count;
847
848 if (!dev->transport->format_prot) {
849 pr_err("DIF protection format not supported by backend %s\n",
850 dev->transport->name);
851 return -ENOSYS;
852 }
853 if (!(dev->dev_flags & DF_CONFIGURED)) {
854 pr_err("DIF protection format requires device to be configured\n");
855 return -ENODEV;
856 }
857 if (dev->export_count) {
858 pr_err("dev[%p]: Unable to format SE Device PROT type while"
859 " export_count is %d\n", dev, dev->export_count);
860 return -EINVAL;
861 }
862
863 ret = dev->transport->format_prot(dev);
864 if (ret)
865 return ret;
866
867 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
868 return count;
869 }
870
871 static ssize_t force_pr_aptpl_store(struct config_item *item,
872 const char *page, size_t count)
873 {
874 struct se_dev_attrib *da = to_attrib(item);
875 bool flag;
876 int ret;
877
878 ret = strtobool(page, &flag);
879 if (ret < 0)
880 return ret;
881 if (da->da_dev->export_count) {
882 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
883 " export_count is %d\n",
884 da->da_dev, da->da_dev->export_count);
885 return -EINVAL;
886 }
887
888 da->force_pr_aptpl = flag;
889 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
890 return count;
891 }
892
893 static ssize_t emulate_rest_reord_store(struct config_item *item,
894 const char *page, size_t count)
895 {
896 struct se_dev_attrib *da = to_attrib(item);
897 bool flag;
898 int ret;
899
900 ret = strtobool(page, &flag);
901 if (ret < 0)
902 return ret;
903
904 if (flag != 0) {
905 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
906 " reordering not implemented\n", da->da_dev);
907 return -ENOSYS;
908 }
909 da->emulate_rest_reord = flag;
910 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
911 da->da_dev, flag);
912 return count;
913 }
914
915 static ssize_t unmap_zeroes_data_store(struct config_item *item,
916 const char *page, size_t count)
917 {
918 struct se_dev_attrib *da = to_attrib(item);
919 bool flag;
920 int ret;
921
922 ret = strtobool(page, &flag);
923 if (ret < 0)
924 return ret;
925
926 if (da->da_dev->export_count) {
927 pr_err("dev[%p]: Unable to change SE Device"
928 " unmap_zeroes_data while export_count is %d\n",
929 da->da_dev, da->da_dev->export_count);
930 return -EINVAL;
931 }
932 /*
933 * We expect this value to be non-zero when generic Block Layer
934 * Discard supported is detected iblock_configure_device().
935 */
936 if (flag && !da->max_unmap_block_desc_count) {
937 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
938 " because max_unmap_block_desc_count is zero\n",
939 da->da_dev);
940 return -ENOSYS;
941 }
942 da->unmap_zeroes_data = flag;
943 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
944 da->da_dev, flag);
945 return count;
946 }
947
948 /*
949 * Note, this can only be called on unexported SE Device Object.
950 */
951 static ssize_t queue_depth_store(struct config_item *item,
952 const char *page, size_t count)
953 {
954 struct se_dev_attrib *da = to_attrib(item);
955 struct se_device *dev = da->da_dev;
956 u32 val;
957 int ret;
958
959 ret = kstrtou32(page, 0, &val);
960 if (ret < 0)
961 return ret;
962
963 if (dev->export_count) {
964 pr_err("dev[%p]: Unable to change SE Device TCQ while"
965 " export_count is %d\n",
966 dev, dev->export_count);
967 return -EINVAL;
968 }
969 if (!val) {
970 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
971 return -EINVAL;
972 }
973
974 if (val > dev->dev_attrib.queue_depth) {
975 if (val > dev->dev_attrib.hw_queue_depth) {
976 pr_err("dev[%p]: Passed queue_depth:"
977 " %u exceeds TCM/SE_Device MAX"
978 " TCQ: %u\n", dev, val,
979 dev->dev_attrib.hw_queue_depth);
980 return -EINVAL;
981 }
982 }
983 da->queue_depth = dev->queue_depth = val;
984 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
985 return count;
986 }
987
988 static ssize_t optimal_sectors_store(struct config_item *item,
989 const char *page, size_t count)
990 {
991 struct se_dev_attrib *da = to_attrib(item);
992 u32 val;
993 int ret;
994
995 ret = kstrtou32(page, 0, &val);
996 if (ret < 0)
997 return ret;
998
999 if (da->da_dev->export_count) {
1000 pr_err("dev[%p]: Unable to change SE Device"
1001 " optimal_sectors while export_count is %d\n",
1002 da->da_dev, da->da_dev->export_count);
1003 return -EINVAL;
1004 }
1005 if (val > da->hw_max_sectors) {
1006 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1007 " greater than hw_max_sectors: %u\n",
1008 da->da_dev, val, da->hw_max_sectors);
1009 return -EINVAL;
1010 }
1011
1012 da->optimal_sectors = val;
1013 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1014 da->da_dev, val);
1015 return count;
1016 }
1017
1018 static ssize_t block_size_store(struct config_item *item,
1019 const char *page, size_t count)
1020 {
1021 struct se_dev_attrib *da = to_attrib(item);
1022 u32 val;
1023 int ret;
1024
1025 ret = kstrtou32(page, 0, &val);
1026 if (ret < 0)
1027 return ret;
1028
1029 if (da->da_dev->export_count) {
1030 pr_err("dev[%p]: Unable to change SE Device block_size"
1031 " while export_count is %d\n",
1032 da->da_dev, da->da_dev->export_count);
1033 return -EINVAL;
1034 }
1035
1036 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1037 pr_err("dev[%p]: Illegal value for block_device: %u"
1038 " for SE device, must be 512, 1024, 2048 or 4096\n",
1039 da->da_dev, val);
1040 return -EINVAL;
1041 }
1042
1043 da->block_size = val;
1044 if (da->max_bytes_per_io)
1045 da->hw_max_sectors = da->max_bytes_per_io / val;
1046
1047 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1048 da->da_dev, val);
1049 return count;
1050 }
1051
1052 CONFIGFS_ATTR(, emulate_model_alias);
1053 CONFIGFS_ATTR(, emulate_dpo);
1054 CONFIGFS_ATTR(, emulate_fua_write);
1055 CONFIGFS_ATTR(, emulate_fua_read);
1056 CONFIGFS_ATTR(, emulate_write_cache);
1057 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1058 CONFIGFS_ATTR(, emulate_tas);
1059 CONFIGFS_ATTR(, emulate_tpu);
1060 CONFIGFS_ATTR(, emulate_tpws);
1061 CONFIGFS_ATTR(, emulate_caw);
1062 CONFIGFS_ATTR(, emulate_3pc);
1063 CONFIGFS_ATTR(, pi_prot_type);
1064 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1065 CONFIGFS_ATTR(, pi_prot_format);
1066 CONFIGFS_ATTR(, enforce_pr_isids);
1067 CONFIGFS_ATTR(, is_nonrot);
1068 CONFIGFS_ATTR(, emulate_rest_reord);
1069 CONFIGFS_ATTR(, force_pr_aptpl);
1070 CONFIGFS_ATTR_RO(, hw_block_size);
1071 CONFIGFS_ATTR(, block_size);
1072 CONFIGFS_ATTR_RO(, hw_max_sectors);
1073 CONFIGFS_ATTR(, optimal_sectors);
1074 CONFIGFS_ATTR_RO(, hw_queue_depth);
1075 CONFIGFS_ATTR(, queue_depth);
1076 CONFIGFS_ATTR(, max_unmap_lba_count);
1077 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1078 CONFIGFS_ATTR(, unmap_granularity);
1079 CONFIGFS_ATTR(, unmap_granularity_alignment);
1080 CONFIGFS_ATTR(, unmap_zeroes_data);
1081 CONFIGFS_ATTR(, max_write_same_len);
1082
1083 /*
1084 * dev_attrib attributes for devices using the target core SBC/SPC
1085 * interpreter. Any backend using spc_parse_cdb should be using
1086 * these.
1087 */
1088 struct configfs_attribute *sbc_attrib_attrs[] = {
1089 &attr_emulate_model_alias,
1090 &attr_emulate_dpo,
1091 &attr_emulate_fua_write,
1092 &attr_emulate_fua_read,
1093 &attr_emulate_write_cache,
1094 &attr_emulate_ua_intlck_ctrl,
1095 &attr_emulate_tas,
1096 &attr_emulate_tpu,
1097 &attr_emulate_tpws,
1098 &attr_emulate_caw,
1099 &attr_emulate_3pc,
1100 &attr_pi_prot_type,
1101 &attr_hw_pi_prot_type,
1102 &attr_pi_prot_format,
1103 &attr_enforce_pr_isids,
1104 &attr_is_nonrot,
1105 &attr_emulate_rest_reord,
1106 &attr_force_pr_aptpl,
1107 &attr_hw_block_size,
1108 &attr_block_size,
1109 &attr_hw_max_sectors,
1110 &attr_optimal_sectors,
1111 &attr_hw_queue_depth,
1112 &attr_queue_depth,
1113 &attr_max_unmap_lba_count,
1114 &attr_max_unmap_block_desc_count,
1115 &attr_unmap_granularity,
1116 &attr_unmap_granularity_alignment,
1117 &attr_unmap_zeroes_data,
1118 &attr_max_write_same_len,
1119 NULL,
1120 };
1121 EXPORT_SYMBOL(sbc_attrib_attrs);
1122
1123 /*
1124 * Minimal dev_attrib attributes for devices passing through CDBs.
1125 * In this case we only provide a few read-only attributes for
1126 * backwards compatibility.
1127 */
1128 struct configfs_attribute *passthrough_attrib_attrs[] = {
1129 &attr_hw_pi_prot_type,
1130 &attr_hw_block_size,
1131 &attr_hw_max_sectors,
1132 &attr_hw_queue_depth,
1133 NULL,
1134 };
1135 EXPORT_SYMBOL(passthrough_attrib_attrs);
1136
1137 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1138
1139 /* End functions for struct config_item_type tb_dev_attrib_cit */
1140
1141 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1142
1143 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1144 {
1145 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1146 }
1147
1148 /*
1149 * VPD page 0x80 Unit serial
1150 */
1151 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1152 char *page)
1153 {
1154 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1155 &to_t10_wwn(item)->unit_serial[0]);
1156 }
1157
1158 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1159 const char *page, size_t count)
1160 {
1161 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1162 struct se_device *dev = t10_wwn->t10_dev;
1163 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1164
1165 /*
1166 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1167 * from the struct scsi_device level firmware, do not allow
1168 * VPD Unit Serial to be emulated.
1169 *
1170 * Note this struct scsi_device could also be emulating VPD
1171 * information from its drivers/scsi LLD. But for now we assume
1172 * it is doing 'the right thing' wrt a world wide unique
1173 * VPD Unit Serial Number that OS dependent multipath can depend on.
1174 */
1175 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1176 pr_err("Underlying SCSI device firmware provided VPD"
1177 " Unit Serial, ignoring request\n");
1178 return -EOPNOTSUPP;
1179 }
1180
1181 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1182 pr_err("Emulated VPD Unit Serial exceeds"
1183 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1184 return -EOVERFLOW;
1185 }
1186 /*
1187 * Check to see if any active $FABRIC_MOD exports exist. If they
1188 * do exist, fail here as changing this information on the fly
1189 * (underneath the initiator side OS dependent multipath code)
1190 * could cause negative effects.
1191 */
1192 if (dev->export_count) {
1193 pr_err("Unable to set VPD Unit Serial while"
1194 " active %d $FABRIC_MOD exports exist\n",
1195 dev->export_count);
1196 return -EINVAL;
1197 }
1198
1199 /*
1200 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1201 *
1202 * Also, strip any newline added from the userspace
1203 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1204 */
1205 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1206 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1207 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1208 "%s", strstrip(buf));
1209 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1210
1211 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1212 " %s\n", dev->t10_wwn.unit_serial);
1213
1214 return count;
1215 }
1216
1217 /*
1218 * VPD page 0x83 Protocol Identifier
1219 */
1220 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1221 char *page)
1222 {
1223 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1224 struct t10_vpd *vpd;
1225 unsigned char buf[VPD_TMP_BUF_SIZE];
1226 ssize_t len = 0;
1227
1228 memset(buf, 0, VPD_TMP_BUF_SIZE);
1229
1230 spin_lock(&t10_wwn->t10_vpd_lock);
1231 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1232 if (!vpd->protocol_identifier_set)
1233 continue;
1234
1235 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1236
1237 if (len + strlen(buf) >= PAGE_SIZE)
1238 break;
1239
1240 len += sprintf(page+len, "%s", buf);
1241 }
1242 spin_unlock(&t10_wwn->t10_vpd_lock);
1243
1244 return len;
1245 }
1246
1247 /*
1248 * Generic wrapper for dumping VPD identifiers by association.
1249 */
1250 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1251 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1252 char *page) \
1253 { \
1254 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1255 struct t10_vpd *vpd; \
1256 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1257 ssize_t len = 0; \
1258 \
1259 spin_lock(&t10_wwn->t10_vpd_lock); \
1260 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1261 if (vpd->association != _assoc) \
1262 continue; \
1263 \
1264 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1265 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1266 if (len + strlen(buf) >= PAGE_SIZE) \
1267 break; \
1268 len += sprintf(page+len, "%s", buf); \
1269 \
1270 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1271 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1272 if (len + strlen(buf) >= PAGE_SIZE) \
1273 break; \
1274 len += sprintf(page+len, "%s", buf); \
1275 \
1276 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1277 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1278 if (len + strlen(buf) >= PAGE_SIZE) \
1279 break; \
1280 len += sprintf(page+len, "%s", buf); \
1281 } \
1282 spin_unlock(&t10_wwn->t10_vpd_lock); \
1283 \
1284 return len; \
1285 }
1286
1287 /* VPD page 0x83 Association: Logical Unit */
1288 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1289 /* VPD page 0x83 Association: Target Port */
1290 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1291 /* VPD page 0x83 Association: SCSI Target Device */
1292 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1293
1294 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1295 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1296 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1297 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1298 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1299
1300 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1301 &target_wwn_attr_vpd_unit_serial,
1302 &target_wwn_attr_vpd_protocol_identifier,
1303 &target_wwn_attr_vpd_assoc_logical_unit,
1304 &target_wwn_attr_vpd_assoc_target_port,
1305 &target_wwn_attr_vpd_assoc_scsi_target_device,
1306 NULL,
1307 };
1308
1309 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1310
1311 /* End functions for struct config_item_type tb_dev_wwn_cit */
1312
1313 /* Start functions for struct config_item_type tb_dev_pr_cit */
1314
1315 static struct se_device *pr_to_dev(struct config_item *item)
1316 {
1317 return container_of(to_config_group(item), struct se_device,
1318 dev_pr_group);
1319 }
1320
1321 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1322 char *page)
1323 {
1324 struct se_node_acl *se_nacl;
1325 struct t10_pr_registration *pr_reg;
1326 char i_buf[PR_REG_ISID_ID_LEN];
1327
1328 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1329
1330 pr_reg = dev->dev_pr_res_holder;
1331 if (!pr_reg)
1332 return sprintf(page, "No SPC-3 Reservation holder\n");
1333
1334 se_nacl = pr_reg->pr_reg_nacl;
1335 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1336
1337 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1338 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1339 se_nacl->initiatorname, i_buf);
1340 }
1341
1342 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1343 char *page)
1344 {
1345 struct se_node_acl *se_nacl;
1346 ssize_t len;
1347
1348 se_nacl = dev->dev_reserved_node_acl;
1349 if (se_nacl) {
1350 len = sprintf(page,
1351 "SPC-2 Reservation: %s Initiator: %s\n",
1352 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1353 se_nacl->initiatorname);
1354 } else {
1355 len = sprintf(page, "No SPC-2 Reservation holder\n");
1356 }
1357 return len;
1358 }
1359
1360 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1361 {
1362 struct se_device *dev = pr_to_dev(item);
1363 int ret;
1364
1365 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1366 return sprintf(page, "Passthrough\n");
1367
1368 spin_lock(&dev->dev_reservation_lock);
1369 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1370 ret = target_core_dev_pr_show_spc2_res(dev, page);
1371 else
1372 ret = target_core_dev_pr_show_spc3_res(dev, page);
1373 spin_unlock(&dev->dev_reservation_lock);
1374 return ret;
1375 }
1376
1377 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1378 char *page)
1379 {
1380 struct se_device *dev = pr_to_dev(item);
1381 ssize_t len = 0;
1382
1383 spin_lock(&dev->dev_reservation_lock);
1384 if (!dev->dev_pr_res_holder) {
1385 len = sprintf(page, "No SPC-3 Reservation holder\n");
1386 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1387 len = sprintf(page, "SPC-3 Reservation: All Target"
1388 " Ports registration\n");
1389 } else {
1390 len = sprintf(page, "SPC-3 Reservation: Single"
1391 " Target Port registration\n");
1392 }
1393
1394 spin_unlock(&dev->dev_reservation_lock);
1395 return len;
1396 }
1397
1398 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1399 char *page)
1400 {
1401 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1402 }
1403
1404
1405 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1406 char *page)
1407 {
1408 struct se_device *dev = pr_to_dev(item);
1409 struct se_node_acl *se_nacl;
1410 struct se_portal_group *se_tpg;
1411 struct t10_pr_registration *pr_reg;
1412 const struct target_core_fabric_ops *tfo;
1413 ssize_t len = 0;
1414
1415 spin_lock(&dev->dev_reservation_lock);
1416 pr_reg = dev->dev_pr_res_holder;
1417 if (!pr_reg) {
1418 len = sprintf(page, "No SPC-3 Reservation holder\n");
1419 goto out_unlock;
1420 }
1421
1422 se_nacl = pr_reg->pr_reg_nacl;
1423 se_tpg = se_nacl->se_tpg;
1424 tfo = se_tpg->se_tpg_tfo;
1425
1426 len += sprintf(page+len, "SPC-3 Reservation: %s"
1427 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1428 tfo->tpg_get_wwn(se_tpg));
1429 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1430 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1431 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1432 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1433 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1434
1435 out_unlock:
1436 spin_unlock(&dev->dev_reservation_lock);
1437 return len;
1438 }
1439
1440
1441 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1442 char *page)
1443 {
1444 struct se_device *dev = pr_to_dev(item);
1445 const struct target_core_fabric_ops *tfo;
1446 struct t10_pr_registration *pr_reg;
1447 unsigned char buf[384];
1448 char i_buf[PR_REG_ISID_ID_LEN];
1449 ssize_t len = 0;
1450 int reg_count = 0;
1451
1452 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1453
1454 spin_lock(&dev->t10_pr.registration_lock);
1455 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1456 pr_reg_list) {
1457
1458 memset(buf, 0, 384);
1459 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1460 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1461 core_pr_dump_initiator_port(pr_reg, i_buf,
1462 PR_REG_ISID_ID_LEN);
1463 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1464 tfo->get_fabric_name(),
1465 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1466 pr_reg->pr_res_generation);
1467
1468 if (len + strlen(buf) >= PAGE_SIZE)
1469 break;
1470
1471 len += sprintf(page+len, "%s", buf);
1472 reg_count++;
1473 }
1474 spin_unlock(&dev->t10_pr.registration_lock);
1475
1476 if (!reg_count)
1477 len += sprintf(page+len, "None\n");
1478
1479 return len;
1480 }
1481
1482 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1483 {
1484 struct se_device *dev = pr_to_dev(item);
1485 struct t10_pr_registration *pr_reg;
1486 ssize_t len = 0;
1487
1488 spin_lock(&dev->dev_reservation_lock);
1489 pr_reg = dev->dev_pr_res_holder;
1490 if (pr_reg) {
1491 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1492 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1493 } else {
1494 len = sprintf(page, "No SPC-3 Reservation holder\n");
1495 }
1496
1497 spin_unlock(&dev->dev_reservation_lock);
1498 return len;
1499 }
1500
1501 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1502 {
1503 struct se_device *dev = pr_to_dev(item);
1504
1505 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1506 return sprintf(page, "SPC_PASSTHROUGH\n");
1507 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1508 return sprintf(page, "SPC2_RESERVATIONS\n");
1509 else
1510 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1511 }
1512
1513 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1514 char *page)
1515 {
1516 struct se_device *dev = pr_to_dev(item);
1517
1518 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1519 return 0;
1520
1521 return sprintf(page, "APTPL Bit Status: %s\n",
1522 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1523 }
1524
1525 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1526 char *page)
1527 {
1528 struct se_device *dev = pr_to_dev(item);
1529
1530 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1531 return 0;
1532
1533 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1534 }
1535
1536 enum {
1537 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1538 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1539 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1540 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1541 };
1542
1543 static match_table_t tokens = {
1544 {Opt_initiator_fabric, "initiator_fabric=%s"},
1545 {Opt_initiator_node, "initiator_node=%s"},
1546 {Opt_initiator_sid, "initiator_sid=%s"},
1547 {Opt_sa_res_key, "sa_res_key=%s"},
1548 {Opt_res_holder, "res_holder=%d"},
1549 {Opt_res_type, "res_type=%d"},
1550 {Opt_res_scope, "res_scope=%d"},
1551 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1552 {Opt_mapped_lun, "mapped_lun=%lld"},
1553 {Opt_target_fabric, "target_fabric=%s"},
1554 {Opt_target_node, "target_node=%s"},
1555 {Opt_tpgt, "tpgt=%d"},
1556 {Opt_port_rtpi, "port_rtpi=%d"},
1557 {Opt_target_lun, "target_lun=%lld"},
1558 {Opt_err, NULL}
1559 };
1560
1561 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1562 const char *page, size_t count)
1563 {
1564 struct se_device *dev = pr_to_dev(item);
1565 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1566 unsigned char *t_fabric = NULL, *t_port = NULL;
1567 char *orig, *ptr, *opts;
1568 substring_t args[MAX_OPT_ARGS];
1569 unsigned long long tmp_ll;
1570 u64 sa_res_key = 0;
1571 u64 mapped_lun = 0, target_lun = 0;
1572 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1573 u16 tpgt = 0;
1574 u8 type = 0;
1575
1576 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1577 return count;
1578 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1579 return count;
1580
1581 if (dev->export_count) {
1582 pr_debug("Unable to process APTPL metadata while"
1583 " active fabric exports exist\n");
1584 return -EINVAL;
1585 }
1586
1587 opts = kstrdup(page, GFP_KERNEL);
1588 if (!opts)
1589 return -ENOMEM;
1590
1591 orig = opts;
1592 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1593 if (!*ptr)
1594 continue;
1595
1596 token = match_token(ptr, tokens, args);
1597 switch (token) {
1598 case Opt_initiator_fabric:
1599 i_fabric = match_strdup(args);
1600 if (!i_fabric) {
1601 ret = -ENOMEM;
1602 goto out;
1603 }
1604 break;
1605 case Opt_initiator_node:
1606 i_port = match_strdup(args);
1607 if (!i_port) {
1608 ret = -ENOMEM;
1609 goto out;
1610 }
1611 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1612 pr_err("APTPL metadata initiator_node="
1613 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1614 PR_APTPL_MAX_IPORT_LEN);
1615 ret = -EINVAL;
1616 break;
1617 }
1618 break;
1619 case Opt_initiator_sid:
1620 isid = match_strdup(args);
1621 if (!isid) {
1622 ret = -ENOMEM;
1623 goto out;
1624 }
1625 if (strlen(isid) >= PR_REG_ISID_LEN) {
1626 pr_err("APTPL metadata initiator_isid"
1627 "= exceeds PR_REG_ISID_LEN: %d\n",
1628 PR_REG_ISID_LEN);
1629 ret = -EINVAL;
1630 break;
1631 }
1632 break;
1633 case Opt_sa_res_key:
1634 ret = kstrtoull(args->from, 0, &tmp_ll);
1635 if (ret < 0) {
1636 pr_err("kstrtoull() failed for sa_res_key=\n");
1637 goto out;
1638 }
1639 sa_res_key = (u64)tmp_ll;
1640 break;
1641 /*
1642 * PR APTPL Metadata for Reservation
1643 */
1644 case Opt_res_holder:
1645 ret = match_int(args, &arg);
1646 if (ret)
1647 goto out;
1648 res_holder = arg;
1649 break;
1650 case Opt_res_type:
1651 ret = match_int(args, &arg);
1652 if (ret)
1653 goto out;
1654 type = (u8)arg;
1655 break;
1656 case Opt_res_scope:
1657 ret = match_int(args, &arg);
1658 if (ret)
1659 goto out;
1660 break;
1661 case Opt_res_all_tg_pt:
1662 ret = match_int(args, &arg);
1663 if (ret)
1664 goto out;
1665 all_tg_pt = (int)arg;
1666 break;
1667 case Opt_mapped_lun:
1668 ret = match_int(args, &arg);
1669 if (ret)
1670 goto out;
1671 mapped_lun = (u64)arg;
1672 break;
1673 /*
1674 * PR APTPL Metadata for Target Port
1675 */
1676 case Opt_target_fabric:
1677 t_fabric = match_strdup(args);
1678 if (!t_fabric) {
1679 ret = -ENOMEM;
1680 goto out;
1681 }
1682 break;
1683 case Opt_target_node:
1684 t_port = match_strdup(args);
1685 if (!t_port) {
1686 ret = -ENOMEM;
1687 goto out;
1688 }
1689 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1690 pr_err("APTPL metadata target_node="
1691 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1692 PR_APTPL_MAX_TPORT_LEN);
1693 ret = -EINVAL;
1694 break;
1695 }
1696 break;
1697 case Opt_tpgt:
1698 ret = match_int(args, &arg);
1699 if (ret)
1700 goto out;
1701 tpgt = (u16)arg;
1702 break;
1703 case Opt_port_rtpi:
1704 ret = match_int(args, &arg);
1705 if (ret)
1706 goto out;
1707 break;
1708 case Opt_target_lun:
1709 ret = match_int(args, &arg);
1710 if (ret)
1711 goto out;
1712 target_lun = (u64)arg;
1713 break;
1714 default:
1715 break;
1716 }
1717 }
1718
1719 if (!i_port || !t_port || !sa_res_key) {
1720 pr_err("Illegal parameters for APTPL registration\n");
1721 ret = -EINVAL;
1722 goto out;
1723 }
1724
1725 if (res_holder && !(type)) {
1726 pr_err("Illegal PR type: 0x%02x for reservation"
1727 " holder\n", type);
1728 ret = -EINVAL;
1729 goto out;
1730 }
1731
1732 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1733 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1734 res_holder, all_tg_pt, type);
1735 out:
1736 kfree(i_fabric);
1737 kfree(i_port);
1738 kfree(isid);
1739 kfree(t_fabric);
1740 kfree(t_port);
1741 kfree(orig);
1742 return (ret == 0) ? count : ret;
1743 }
1744
1745
1746 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1747 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1748 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1749 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1750 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1751 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1752 CONFIGFS_ATTR_RO(target_pr_, res_type);
1753 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1754 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1755
1756 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1757 &target_pr_attr_res_holder,
1758 &target_pr_attr_res_pr_all_tgt_pts,
1759 &target_pr_attr_res_pr_generation,
1760 &target_pr_attr_res_pr_holder_tg_port,
1761 &target_pr_attr_res_pr_registered_i_pts,
1762 &target_pr_attr_res_pr_type,
1763 &target_pr_attr_res_type,
1764 &target_pr_attr_res_aptpl_active,
1765 &target_pr_attr_res_aptpl_metadata,
1766 NULL,
1767 };
1768
1769 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1770
1771 /* End functions for struct config_item_type tb_dev_pr_cit */
1772
1773 /* Start functions for struct config_item_type tb_dev_cit */
1774
1775 static inline struct se_device *to_device(struct config_item *item)
1776 {
1777 return container_of(to_config_group(item), struct se_device, dev_group);
1778 }
1779
1780 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1781 {
1782 struct se_device *dev = to_device(item);
1783 int bl = 0;
1784 ssize_t read_bytes = 0;
1785
1786 transport_dump_dev_state(dev, page, &bl);
1787 read_bytes += bl;
1788 read_bytes += dev->transport->show_configfs_dev_params(dev,
1789 page+read_bytes);
1790 return read_bytes;
1791 }
1792
1793 static ssize_t target_dev_control_store(struct config_item *item,
1794 const char *page, size_t count)
1795 {
1796 struct se_device *dev = to_device(item);
1797
1798 return dev->transport->set_configfs_dev_params(dev, page, count);
1799 }
1800
1801 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1802 {
1803 struct se_device *dev = to_device(item);
1804
1805 if (!(dev->dev_flags & DF_USING_ALIAS))
1806 return 0;
1807
1808 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1809 }
1810
1811 static ssize_t target_dev_alias_store(struct config_item *item,
1812 const char *page, size_t count)
1813 {
1814 struct se_device *dev = to_device(item);
1815 struct se_hba *hba = dev->se_hba;
1816 ssize_t read_bytes;
1817
1818 if (count > (SE_DEV_ALIAS_LEN-1)) {
1819 pr_err("alias count: %d exceeds"
1820 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1821 SE_DEV_ALIAS_LEN-1);
1822 return -EINVAL;
1823 }
1824
1825 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1826 if (!read_bytes)
1827 return -EINVAL;
1828 if (dev->dev_alias[read_bytes - 1] == '\n')
1829 dev->dev_alias[read_bytes - 1] = '\0';
1830
1831 dev->dev_flags |= DF_USING_ALIAS;
1832
1833 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1834 config_item_name(&hba->hba_group.cg_item),
1835 config_item_name(&dev->dev_group.cg_item),
1836 dev->dev_alias);
1837
1838 return read_bytes;
1839 }
1840
1841 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1842 {
1843 struct se_device *dev = to_device(item);
1844
1845 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1846 return 0;
1847
1848 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1849 }
1850
1851 static ssize_t target_dev_udev_path_store(struct config_item *item,
1852 const char *page, size_t count)
1853 {
1854 struct se_device *dev = to_device(item);
1855 struct se_hba *hba = dev->se_hba;
1856 ssize_t read_bytes;
1857
1858 if (count > (SE_UDEV_PATH_LEN-1)) {
1859 pr_err("udev_path count: %d exceeds"
1860 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1861 SE_UDEV_PATH_LEN-1);
1862 return -EINVAL;
1863 }
1864
1865 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1866 "%s", page);
1867 if (!read_bytes)
1868 return -EINVAL;
1869 if (dev->udev_path[read_bytes - 1] == '\n')
1870 dev->udev_path[read_bytes - 1] = '\0';
1871
1872 dev->dev_flags |= DF_USING_UDEV_PATH;
1873
1874 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1875 config_item_name(&hba->hba_group.cg_item),
1876 config_item_name(&dev->dev_group.cg_item),
1877 dev->udev_path);
1878
1879 return read_bytes;
1880 }
1881
1882 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1883 {
1884 struct se_device *dev = to_device(item);
1885
1886 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1887 }
1888
1889 static ssize_t target_dev_enable_store(struct config_item *item,
1890 const char *page, size_t count)
1891 {
1892 struct se_device *dev = to_device(item);
1893 char *ptr;
1894 int ret;
1895
1896 ptr = strstr(page, "1");
1897 if (!ptr) {
1898 pr_err("For dev_enable ops, only valid value"
1899 " is \"1\"\n");
1900 return -EINVAL;
1901 }
1902
1903 ret = target_configure_device(dev);
1904 if (ret)
1905 return ret;
1906 return count;
1907 }
1908
1909 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1910 {
1911 struct se_device *dev = to_device(item);
1912 struct config_item *lu_ci;
1913 struct t10_alua_lu_gp *lu_gp;
1914 struct t10_alua_lu_gp_member *lu_gp_mem;
1915 ssize_t len = 0;
1916
1917 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1918 if (!lu_gp_mem)
1919 return 0;
1920
1921 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1922 lu_gp = lu_gp_mem->lu_gp;
1923 if (lu_gp) {
1924 lu_ci = &lu_gp->lu_gp_group.cg_item;
1925 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1926 config_item_name(lu_ci), lu_gp->lu_gp_id);
1927 }
1928 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1929
1930 return len;
1931 }
1932
1933 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1934 const char *page, size_t count)
1935 {
1936 struct se_device *dev = to_device(item);
1937 struct se_hba *hba = dev->se_hba;
1938 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1939 struct t10_alua_lu_gp_member *lu_gp_mem;
1940 unsigned char buf[LU_GROUP_NAME_BUF];
1941 int move = 0;
1942
1943 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1944 if (!lu_gp_mem)
1945 return count;
1946
1947 if (count > LU_GROUP_NAME_BUF) {
1948 pr_err("ALUA LU Group Alias too large!\n");
1949 return -EINVAL;
1950 }
1951 memset(buf, 0, LU_GROUP_NAME_BUF);
1952 memcpy(buf, page, count);
1953 /*
1954 * Any ALUA logical unit alias besides "NULL" means we will be
1955 * making a new group association.
1956 */
1957 if (strcmp(strstrip(buf), "NULL")) {
1958 /*
1959 * core_alua_get_lu_gp_by_name() will increment reference to
1960 * struct t10_alua_lu_gp. This reference is released with
1961 * core_alua_get_lu_gp_by_name below().
1962 */
1963 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
1964 if (!lu_gp_new)
1965 return -ENODEV;
1966 }
1967
1968 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1969 lu_gp = lu_gp_mem->lu_gp;
1970 if (lu_gp) {
1971 /*
1972 * Clearing an existing lu_gp association, and replacing
1973 * with NULL
1974 */
1975 if (!lu_gp_new) {
1976 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
1977 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
1978 " %hu\n",
1979 config_item_name(&hba->hba_group.cg_item),
1980 config_item_name(&dev->dev_group.cg_item),
1981 config_item_name(&lu_gp->lu_gp_group.cg_item),
1982 lu_gp->lu_gp_id);
1983
1984 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1985 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1986
1987 return count;
1988 }
1989 /*
1990 * Removing existing association of lu_gp_mem with lu_gp
1991 */
1992 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
1993 move = 1;
1994 }
1995 /*
1996 * Associate lu_gp_mem with lu_gp_new.
1997 */
1998 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
1999 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2000
2001 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2002 " core/alua/lu_gps/%s, ID: %hu\n",
2003 (move) ? "Moving" : "Adding",
2004 config_item_name(&hba->hba_group.cg_item),
2005 config_item_name(&dev->dev_group.cg_item),
2006 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2007 lu_gp_new->lu_gp_id);
2008
2009 core_alua_put_lu_gp_from_name(lu_gp_new);
2010 return count;
2011 }
2012
2013 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2014 {
2015 struct se_device *dev = to_device(item);
2016 struct t10_alua_lba_map *map;
2017 struct t10_alua_lba_map_member *mem;
2018 char *b = page;
2019 int bl = 0;
2020 char state;
2021
2022 spin_lock(&dev->t10_alua.lba_map_lock);
2023 if (!list_empty(&dev->t10_alua.lba_map_list))
2024 bl += sprintf(b + bl, "%u %u\n",
2025 dev->t10_alua.lba_map_segment_size,
2026 dev->t10_alua.lba_map_segment_multiplier);
2027 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2028 bl += sprintf(b + bl, "%llu %llu",
2029 map->lba_map_first_lba, map->lba_map_last_lba);
2030 list_for_each_entry(mem, &map->lba_map_mem_list,
2031 lba_map_mem_list) {
2032 switch (mem->lba_map_mem_alua_state) {
2033 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2034 state = 'O';
2035 break;
2036 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2037 state = 'A';
2038 break;
2039 case ALUA_ACCESS_STATE_STANDBY:
2040 state = 'S';
2041 break;
2042 case ALUA_ACCESS_STATE_UNAVAILABLE:
2043 state = 'U';
2044 break;
2045 default:
2046 state = '.';
2047 break;
2048 }
2049 bl += sprintf(b + bl, " %d:%c",
2050 mem->lba_map_mem_alua_pg_id, state);
2051 }
2052 bl += sprintf(b + bl, "\n");
2053 }
2054 spin_unlock(&dev->t10_alua.lba_map_lock);
2055 return bl;
2056 }
2057
2058 static ssize_t target_dev_lba_map_store(struct config_item *item,
2059 const char *page, size_t count)
2060 {
2061 struct se_device *dev = to_device(item);
2062 struct t10_alua_lba_map *lba_map = NULL;
2063 struct list_head lba_list;
2064 char *map_entries, *orig, *ptr;
2065 char state;
2066 int pg_num = -1, pg;
2067 int ret = 0, num = 0, pg_id, alua_state;
2068 unsigned long start_lba = -1, end_lba = -1;
2069 unsigned long segment_size = -1, segment_mult = -1;
2070
2071 orig = map_entries = kstrdup(page, GFP_KERNEL);
2072 if (!map_entries)
2073 return -ENOMEM;
2074
2075 INIT_LIST_HEAD(&lba_list);
2076 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2077 if (!*ptr)
2078 continue;
2079
2080 if (num == 0) {
2081 if (sscanf(ptr, "%lu %lu\n",
2082 &segment_size, &segment_mult) != 2) {
2083 pr_err("Invalid line %d\n", num);
2084 ret = -EINVAL;
2085 break;
2086 }
2087 num++;
2088 continue;
2089 }
2090 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2091 pr_err("Invalid line %d\n", num);
2092 ret = -EINVAL;
2093 break;
2094 }
2095 ptr = strchr(ptr, ' ');
2096 if (!ptr) {
2097 pr_err("Invalid line %d, missing end lba\n", num);
2098 ret = -EINVAL;
2099 break;
2100 }
2101 ptr++;
2102 ptr = strchr(ptr, ' ');
2103 if (!ptr) {
2104 pr_err("Invalid line %d, missing state definitions\n",
2105 num);
2106 ret = -EINVAL;
2107 break;
2108 }
2109 ptr++;
2110 lba_map = core_alua_allocate_lba_map(&lba_list,
2111 start_lba, end_lba);
2112 if (IS_ERR(lba_map)) {
2113 ret = PTR_ERR(lba_map);
2114 break;
2115 }
2116 pg = 0;
2117 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2118 switch (state) {
2119 case 'O':
2120 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2121 break;
2122 case 'A':
2123 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2124 break;
2125 case 'S':
2126 alua_state = ALUA_ACCESS_STATE_STANDBY;
2127 break;
2128 case 'U':
2129 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2130 break;
2131 default:
2132 pr_err("Invalid ALUA state '%c'\n", state);
2133 ret = -EINVAL;
2134 goto out;
2135 }
2136
2137 ret = core_alua_allocate_lba_map_mem(lba_map,
2138 pg_id, alua_state);
2139 if (ret) {
2140 pr_err("Invalid target descriptor %d:%c "
2141 "at line %d\n",
2142 pg_id, state, num);
2143 break;
2144 }
2145 pg++;
2146 ptr = strchr(ptr, ' ');
2147 if (ptr)
2148 ptr++;
2149 else
2150 break;
2151 }
2152 if (pg_num == -1)
2153 pg_num = pg;
2154 else if (pg != pg_num) {
2155 pr_err("Only %d from %d port groups definitions "
2156 "at line %d\n", pg, pg_num, num);
2157 ret = -EINVAL;
2158 break;
2159 }
2160 num++;
2161 }
2162 out:
2163 if (ret) {
2164 core_alua_free_lba_map(&lba_list);
2165 count = ret;
2166 } else
2167 core_alua_set_lba_map(dev, &lba_list,
2168 segment_size, segment_mult);
2169 kfree(orig);
2170 return count;
2171 }
2172
2173 CONFIGFS_ATTR_RO(target_dev_, info);
2174 CONFIGFS_ATTR_WO(target_dev_, control);
2175 CONFIGFS_ATTR(target_dev_, alias);
2176 CONFIGFS_ATTR(target_dev_, udev_path);
2177 CONFIGFS_ATTR(target_dev_, enable);
2178 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2179 CONFIGFS_ATTR(target_dev_, lba_map);
2180
2181 static struct configfs_attribute *target_core_dev_attrs[] = {
2182 &target_dev_attr_info,
2183 &target_dev_attr_control,
2184 &target_dev_attr_alias,
2185 &target_dev_attr_udev_path,
2186 &target_dev_attr_enable,
2187 &target_dev_attr_alua_lu_gp,
2188 &target_dev_attr_lba_map,
2189 NULL,
2190 };
2191
2192 static void target_core_dev_release(struct config_item *item)
2193 {
2194 struct config_group *dev_cg = to_config_group(item);
2195 struct se_device *dev =
2196 container_of(dev_cg, struct se_device, dev_group);
2197
2198 target_free_device(dev);
2199 }
2200
2201 static struct configfs_item_operations target_core_dev_item_ops = {
2202 .release = target_core_dev_release,
2203 };
2204
2205 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2206
2207 /* End functions for struct config_item_type tb_dev_cit */
2208
2209 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2210
2211 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2212 {
2213 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2214 lu_gp_group);
2215 }
2216
2217 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2218 {
2219 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2220
2221 if (!lu_gp->lu_gp_valid_id)
2222 return 0;
2223 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2224 }
2225
2226 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2227 const char *page, size_t count)
2228 {
2229 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2230 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2231 unsigned long lu_gp_id;
2232 int ret;
2233
2234 ret = kstrtoul(page, 0, &lu_gp_id);
2235 if (ret < 0) {
2236 pr_err("kstrtoul() returned %d for"
2237 " lu_gp_id\n", ret);
2238 return ret;
2239 }
2240 if (lu_gp_id > 0x0000ffff) {
2241 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2242 " 0x0000ffff\n", lu_gp_id);
2243 return -EINVAL;
2244 }
2245
2246 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2247 if (ret < 0)
2248 return -EINVAL;
2249
2250 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2251 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2252 config_item_name(&alua_lu_gp_cg->cg_item),
2253 lu_gp->lu_gp_id);
2254
2255 return count;
2256 }
2257
2258 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2259 {
2260 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2261 struct se_device *dev;
2262 struct se_hba *hba;
2263 struct t10_alua_lu_gp_member *lu_gp_mem;
2264 ssize_t len = 0, cur_len;
2265 unsigned char buf[LU_GROUP_NAME_BUF];
2266
2267 memset(buf, 0, LU_GROUP_NAME_BUF);
2268
2269 spin_lock(&lu_gp->lu_gp_lock);
2270 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2271 dev = lu_gp_mem->lu_gp_mem_dev;
2272 hba = dev->se_hba;
2273
2274 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2275 config_item_name(&hba->hba_group.cg_item),
2276 config_item_name(&dev->dev_group.cg_item));
2277 cur_len++; /* Extra byte for NULL terminator */
2278
2279 if ((cur_len + len) > PAGE_SIZE) {
2280 pr_warn("Ran out of lu_gp_show_attr"
2281 "_members buffer\n");
2282 break;
2283 }
2284 memcpy(page+len, buf, cur_len);
2285 len += cur_len;
2286 }
2287 spin_unlock(&lu_gp->lu_gp_lock);
2288
2289 return len;
2290 }
2291
2292 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2293 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2294
2295 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2296 &target_lu_gp_attr_lu_gp_id,
2297 &target_lu_gp_attr_members,
2298 NULL,
2299 };
2300
2301 static void target_core_alua_lu_gp_release(struct config_item *item)
2302 {
2303 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2304 struct t10_alua_lu_gp, lu_gp_group);
2305
2306 core_alua_free_lu_gp(lu_gp);
2307 }
2308
2309 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2310 .release = target_core_alua_lu_gp_release,
2311 };
2312
2313 static struct config_item_type target_core_alua_lu_gp_cit = {
2314 .ct_item_ops = &target_core_alua_lu_gp_ops,
2315 .ct_attrs = target_core_alua_lu_gp_attrs,
2316 .ct_owner = THIS_MODULE,
2317 };
2318
2319 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2320
2321 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2322
2323 static struct config_group *target_core_alua_create_lu_gp(
2324 struct config_group *group,
2325 const char *name)
2326 {
2327 struct t10_alua_lu_gp *lu_gp;
2328 struct config_group *alua_lu_gp_cg = NULL;
2329 struct config_item *alua_lu_gp_ci = NULL;
2330
2331 lu_gp = core_alua_allocate_lu_gp(name, 0);
2332 if (IS_ERR(lu_gp))
2333 return NULL;
2334
2335 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2336 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2337
2338 config_group_init_type_name(alua_lu_gp_cg, name,
2339 &target_core_alua_lu_gp_cit);
2340
2341 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2342 " Group: core/alua/lu_gps/%s\n",
2343 config_item_name(alua_lu_gp_ci));
2344
2345 return alua_lu_gp_cg;
2346
2347 }
2348
2349 static void target_core_alua_drop_lu_gp(
2350 struct config_group *group,
2351 struct config_item *item)
2352 {
2353 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2354 struct t10_alua_lu_gp, lu_gp_group);
2355
2356 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2357 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2358 config_item_name(item), lu_gp->lu_gp_id);
2359 /*
2360 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2361 * -> target_core_alua_lu_gp_release()
2362 */
2363 config_item_put(item);
2364 }
2365
2366 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2367 .make_group = &target_core_alua_create_lu_gp,
2368 .drop_item = &target_core_alua_drop_lu_gp,
2369 };
2370
2371 static struct config_item_type target_core_alua_lu_gps_cit = {
2372 .ct_item_ops = NULL,
2373 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2374 .ct_owner = THIS_MODULE,
2375 };
2376
2377 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2378
2379 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2380
2381 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2382 {
2383 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2384 tg_pt_gp_group);
2385 }
2386
2387 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2388 char *page)
2389 {
2390 return sprintf(page, "%d\n",
2391 atomic_read(&to_tg_pt_gp(item)->tg_pt_gp_alua_access_state));
2392 }
2393
2394 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2395 const char *page, size_t count)
2396 {
2397 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2398 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2399 unsigned long tmp;
2400 int new_state, ret;
2401
2402 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2403 pr_err("Unable to do implicit ALUA on non valid"
2404 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2405 return -EINVAL;
2406 }
2407 if (!(dev->dev_flags & DF_CONFIGURED)) {
2408 pr_err("Unable to set alua_access_state while device is"
2409 " not configured\n");
2410 return -ENODEV;
2411 }
2412
2413 ret = kstrtoul(page, 0, &tmp);
2414 if (ret < 0) {
2415 pr_err("Unable to extract new ALUA access state from"
2416 " %s\n", page);
2417 return ret;
2418 }
2419 new_state = (int)tmp;
2420
2421 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2422 pr_err("Unable to process implicit configfs ALUA"
2423 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2424 return -EINVAL;
2425 }
2426 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2427 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2428 /* LBA DEPENDENT is only allowed with implicit ALUA */
2429 pr_err("Unable to process implicit configfs ALUA transition"
2430 " while explicit ALUA management is enabled\n");
2431 return -EINVAL;
2432 }
2433
2434 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2435 NULL, NULL, new_state, 0);
2436 return (!ret) ? count : -EINVAL;
2437 }
2438
2439 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2440 char *page)
2441 {
2442 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2443 return sprintf(page, "%s\n",
2444 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2445 }
2446
2447 static ssize_t target_tg_pt_gp_alua_access_status_store(
2448 struct config_item *item, const char *page, size_t count)
2449 {
2450 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2451 unsigned long tmp;
2452 int new_status, ret;
2453
2454 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2455 pr_err("Unable to do set ALUA access status on non"
2456 " valid tg_pt_gp ID: %hu\n",
2457 tg_pt_gp->tg_pt_gp_valid_id);
2458 return -EINVAL;
2459 }
2460
2461 ret = kstrtoul(page, 0, &tmp);
2462 if (ret < 0) {
2463 pr_err("Unable to extract new ALUA access status"
2464 " from %s\n", page);
2465 return ret;
2466 }
2467 new_status = (int)tmp;
2468
2469 if ((new_status != ALUA_STATUS_NONE) &&
2470 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2471 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2472 pr_err("Illegal ALUA access status: 0x%02x\n",
2473 new_status);
2474 return -EINVAL;
2475 }
2476
2477 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2478 return count;
2479 }
2480
2481 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2482 char *page)
2483 {
2484 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2485 }
2486
2487 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2488 const char *page, size_t count)
2489 {
2490 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2491 }
2492
2493 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2494 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2495 struct config_item *item, char *p) \
2496 { \
2497 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2498 return sprintf(p, "%d\n", \
2499 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2500 } \
2501 \
2502 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2503 struct config_item *item, const char *p, size_t c) \
2504 { \
2505 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2506 unsigned long tmp; \
2507 int ret; \
2508 \
2509 if (!t->tg_pt_gp_valid_id) { \
2510 pr_err("Unable to do set ##_name ALUA state on non" \
2511 " valid tg_pt_gp ID: %hu\n", \
2512 t->tg_pt_gp_valid_id); \
2513 return -EINVAL; \
2514 } \
2515 \
2516 ret = kstrtoul(p, 0, &tmp); \
2517 if (ret < 0) { \
2518 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2519 return -EINVAL; \
2520 } \
2521 if (tmp > 1) { \
2522 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2523 return -EINVAL; \
2524 } \
2525 if (tmp) \
2526 t->tg_pt_gp_alua_supported_states |= _bit; \
2527 else \
2528 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2529 \
2530 return c; \
2531 }
2532
2533 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2534 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2535 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2536 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2537 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2538 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2539 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2540
2541 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2542 struct config_item *item, char *page)
2543 {
2544 return sprintf(page, "%d\n",
2545 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2546 }
2547
2548 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2549 struct config_item *item, const char *page, size_t count)
2550 {
2551 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2552 unsigned long tmp;
2553 int ret;
2554
2555 ret = kstrtoul(page, 0, &tmp);
2556 if (ret < 0) {
2557 pr_err("Unable to extract alua_write_metadata\n");
2558 return ret;
2559 }
2560
2561 if ((tmp != 0) && (tmp != 1)) {
2562 pr_err("Illegal value for alua_write_metadata:"
2563 " %lu\n", tmp);
2564 return -EINVAL;
2565 }
2566 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2567
2568 return count;
2569 }
2570
2571 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2572 char *page)
2573 {
2574 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2575 }
2576
2577 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2578 const char *page, size_t count)
2579 {
2580 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2581 count);
2582 }
2583
2584 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2585 char *page)
2586 {
2587 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2588 }
2589
2590 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2591 const char *page, size_t count)
2592 {
2593 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2594 count);
2595 }
2596
2597 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2598 struct config_item *item, char *page)
2599 {
2600 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2601 }
2602
2603 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2604 struct config_item *item, const char *page, size_t count)
2605 {
2606 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2607 count);
2608 }
2609
2610 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2611 char *page)
2612 {
2613 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2614 }
2615
2616 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2617 const char *page, size_t count)
2618 {
2619 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2620 }
2621
2622 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2623 char *page)
2624 {
2625 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2626
2627 if (!tg_pt_gp->tg_pt_gp_valid_id)
2628 return 0;
2629 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2630 }
2631
2632 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2633 const char *page, size_t count)
2634 {
2635 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2636 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2637 unsigned long tg_pt_gp_id;
2638 int ret;
2639
2640 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2641 if (ret < 0) {
2642 pr_err("kstrtoul() returned %d for"
2643 " tg_pt_gp_id\n", ret);
2644 return ret;
2645 }
2646 if (tg_pt_gp_id > 0x0000ffff) {
2647 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2648 " 0x0000ffff\n", tg_pt_gp_id);
2649 return -EINVAL;
2650 }
2651
2652 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2653 if (ret < 0)
2654 return -EINVAL;
2655
2656 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2657 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2658 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2659 tg_pt_gp->tg_pt_gp_id);
2660
2661 return count;
2662 }
2663
2664 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2665 char *page)
2666 {
2667 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2668 struct se_lun *lun;
2669 ssize_t len = 0, cur_len;
2670 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2671
2672 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2673
2674 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2675 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2676 lun_tg_pt_gp_link) {
2677 struct se_portal_group *tpg = lun->lun_tpg;
2678
2679 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2680 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2681 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2682 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2683 config_item_name(&lun->lun_group.cg_item));
2684 cur_len++; /* Extra byte for NULL terminator */
2685
2686 if ((cur_len + len) > PAGE_SIZE) {
2687 pr_warn("Ran out of lu_gp_show_attr"
2688 "_members buffer\n");
2689 break;
2690 }
2691 memcpy(page+len, buf, cur_len);
2692 len += cur_len;
2693 }
2694 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2695
2696 return len;
2697 }
2698
2699 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2700 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2701 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2702 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2703 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2704 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2705 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2706 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2707 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2708 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2709 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2710 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2711 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2712 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2713 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2714 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2715 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2716
2717 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2718 &target_tg_pt_gp_attr_alua_access_state,
2719 &target_tg_pt_gp_attr_alua_access_status,
2720 &target_tg_pt_gp_attr_alua_access_type,
2721 &target_tg_pt_gp_attr_alua_support_transitioning,
2722 &target_tg_pt_gp_attr_alua_support_offline,
2723 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2724 &target_tg_pt_gp_attr_alua_support_unavailable,
2725 &target_tg_pt_gp_attr_alua_support_standby,
2726 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2727 &target_tg_pt_gp_attr_alua_support_active_optimized,
2728 &target_tg_pt_gp_attr_alua_write_metadata,
2729 &target_tg_pt_gp_attr_nonop_delay_msecs,
2730 &target_tg_pt_gp_attr_trans_delay_msecs,
2731 &target_tg_pt_gp_attr_implicit_trans_secs,
2732 &target_tg_pt_gp_attr_preferred,
2733 &target_tg_pt_gp_attr_tg_pt_gp_id,
2734 &target_tg_pt_gp_attr_members,
2735 NULL,
2736 };
2737
2738 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2739 {
2740 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2741 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2742
2743 core_alua_free_tg_pt_gp(tg_pt_gp);
2744 }
2745
2746 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2747 .release = target_core_alua_tg_pt_gp_release,
2748 };
2749
2750 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2751 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2752 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2753 .ct_owner = THIS_MODULE,
2754 };
2755
2756 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2757
2758 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2759
2760 static struct config_group *target_core_alua_create_tg_pt_gp(
2761 struct config_group *group,
2762 const char *name)
2763 {
2764 struct t10_alua *alua = container_of(group, struct t10_alua,
2765 alua_tg_pt_gps_group);
2766 struct t10_alua_tg_pt_gp *tg_pt_gp;
2767 struct config_group *alua_tg_pt_gp_cg = NULL;
2768 struct config_item *alua_tg_pt_gp_ci = NULL;
2769
2770 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2771 if (!tg_pt_gp)
2772 return NULL;
2773
2774 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2775 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2776
2777 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2778 &target_core_alua_tg_pt_gp_cit);
2779
2780 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2781 " Group: alua/tg_pt_gps/%s\n",
2782 config_item_name(alua_tg_pt_gp_ci));
2783
2784 return alua_tg_pt_gp_cg;
2785 }
2786
2787 static void target_core_alua_drop_tg_pt_gp(
2788 struct config_group *group,
2789 struct config_item *item)
2790 {
2791 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2792 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2793
2794 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2795 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2796 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2797 /*
2798 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2799 * -> target_core_alua_tg_pt_gp_release().
2800 */
2801 config_item_put(item);
2802 }
2803
2804 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2805 .make_group = &target_core_alua_create_tg_pt_gp,
2806 .drop_item = &target_core_alua_drop_tg_pt_gp,
2807 };
2808
2809 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2810
2811 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2812
2813 /* Start functions for struct config_item_type target_core_alua_cit */
2814
2815 /*
2816 * target_core_alua_cit is a ConfigFS group that lives under
2817 * /sys/kernel/config/target/core/alua. There are default groups
2818 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2819 * target_core_alua_cit in target_core_init_configfs() below.
2820 */
2821 static struct config_item_type target_core_alua_cit = {
2822 .ct_item_ops = NULL,
2823 .ct_attrs = NULL,
2824 .ct_owner = THIS_MODULE,
2825 };
2826
2827 /* End functions for struct config_item_type target_core_alua_cit */
2828
2829 /* Start functions for struct config_item_type tb_dev_stat_cit */
2830
2831 static struct config_group *target_core_stat_mkdir(
2832 struct config_group *group,
2833 const char *name)
2834 {
2835 return ERR_PTR(-ENOSYS);
2836 }
2837
2838 static void target_core_stat_rmdir(
2839 struct config_group *group,
2840 struct config_item *item)
2841 {
2842 return;
2843 }
2844
2845 static struct configfs_group_operations target_core_stat_group_ops = {
2846 .make_group = &target_core_stat_mkdir,
2847 .drop_item = &target_core_stat_rmdir,
2848 };
2849
2850 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2851
2852 /* End functions for struct config_item_type tb_dev_stat_cit */
2853
2854 /* Start functions for struct config_item_type target_core_hba_cit */
2855
2856 static struct config_group *target_core_make_subdev(
2857 struct config_group *group,
2858 const char *name)
2859 {
2860 struct t10_alua_tg_pt_gp *tg_pt_gp;
2861 struct config_item *hba_ci = &group->cg_item;
2862 struct se_hba *hba = item_to_hba(hba_ci);
2863 struct target_backend *tb = hba->backend;
2864 struct se_device *dev;
2865 int errno = -ENOMEM, ret;
2866
2867 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2868 if (ret)
2869 return ERR_PTR(ret);
2870
2871 dev = target_alloc_device(hba, name);
2872 if (!dev)
2873 goto out_unlock;
2874
2875 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2876
2877 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2878 &tb->tb_dev_attrib_cit);
2879 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2880
2881 config_group_init_type_name(&dev->dev_pr_group, "pr",
2882 &tb->tb_dev_pr_cit);
2883 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2884
2885 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2886 &tb->tb_dev_wwn_cit);
2887 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2888 &dev->dev_group);
2889
2890 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2891 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2892 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2893 &dev->dev_group);
2894
2895 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2896 "statistics", &tb->tb_dev_stat_cit);
2897 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2898 &dev->dev_group);
2899
2900 /*
2901 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2902 */
2903 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2904 if (!tg_pt_gp)
2905 goto out_free_device;
2906 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2907
2908 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2909 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2910 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2911 &dev->t10_alua.alua_tg_pt_gps_group);
2912
2913 /*
2914 * Add core/$HBA/$DEV/statistics/ default groups
2915 */
2916 target_stat_setup_dev_default_groups(dev);
2917
2918 mutex_unlock(&hba->hba_access_mutex);
2919 return &dev->dev_group;
2920
2921 out_free_device:
2922 target_free_device(dev);
2923 out_unlock:
2924 mutex_unlock(&hba->hba_access_mutex);
2925 return ERR_PTR(errno);
2926 }
2927
2928 static void target_core_drop_subdev(
2929 struct config_group *group,
2930 struct config_item *item)
2931 {
2932 struct config_group *dev_cg = to_config_group(item);
2933 struct se_device *dev =
2934 container_of(dev_cg, struct se_device, dev_group);
2935 struct se_hba *hba;
2936
2937 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
2938
2939 mutex_lock(&hba->hba_access_mutex);
2940
2941 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
2942 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
2943
2944 /*
2945 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
2946 * directly from target_core_alua_tg_pt_gp_release().
2947 */
2948 dev->t10_alua.default_tg_pt_gp = NULL;
2949
2950 configfs_remove_default_groups(dev_cg);
2951
2952 /*
2953 * se_dev is released from target_core_dev_item_ops->release()
2954 */
2955 config_item_put(item);
2956 mutex_unlock(&hba->hba_access_mutex);
2957 }
2958
2959 static struct configfs_group_operations target_core_hba_group_ops = {
2960 .make_group = target_core_make_subdev,
2961 .drop_item = target_core_drop_subdev,
2962 };
2963
2964
2965 static inline struct se_hba *to_hba(struct config_item *item)
2966 {
2967 return container_of(to_config_group(item), struct se_hba, hba_group);
2968 }
2969
2970 static ssize_t target_hba_info_show(struct config_item *item, char *page)
2971 {
2972 struct se_hba *hba = to_hba(item);
2973
2974 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
2975 hba->hba_id, hba->backend->ops->name,
2976 TARGET_CORE_VERSION);
2977 }
2978
2979 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
2980 {
2981 struct se_hba *hba = to_hba(item);
2982 int hba_mode = 0;
2983
2984 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
2985 hba_mode = 1;
2986
2987 return sprintf(page, "%d\n", hba_mode);
2988 }
2989
2990 static ssize_t target_hba_mode_store(struct config_item *item,
2991 const char *page, size_t count)
2992 {
2993 struct se_hba *hba = to_hba(item);
2994 unsigned long mode_flag;
2995 int ret;
2996
2997 if (hba->backend->ops->pmode_enable_hba == NULL)
2998 return -EINVAL;
2999
3000 ret = kstrtoul(page, 0, &mode_flag);
3001 if (ret < 0) {
3002 pr_err("Unable to extract hba mode flag: %d\n", ret);
3003 return ret;
3004 }
3005
3006 if (hba->dev_count) {
3007 pr_err("Unable to set hba_mode with active devices\n");
3008 return -EINVAL;
3009 }
3010
3011 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3012 if (ret < 0)
3013 return -EINVAL;
3014 if (ret > 0)
3015 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3016 else if (ret == 0)
3017 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3018
3019 return count;
3020 }
3021
3022 CONFIGFS_ATTR_RO(target_, hba_info);
3023 CONFIGFS_ATTR(target_, hba_mode);
3024
3025 static void target_core_hba_release(struct config_item *item)
3026 {
3027 struct se_hba *hba = container_of(to_config_group(item),
3028 struct se_hba, hba_group);
3029 core_delete_hba(hba);
3030 }
3031
3032 static struct configfs_attribute *target_core_hba_attrs[] = {
3033 &target_attr_hba_info,
3034 &target_attr_hba_mode,
3035 NULL,
3036 };
3037
3038 static struct configfs_item_operations target_core_hba_item_ops = {
3039 .release = target_core_hba_release,
3040 };
3041
3042 static struct config_item_type target_core_hba_cit = {
3043 .ct_item_ops = &target_core_hba_item_ops,
3044 .ct_group_ops = &target_core_hba_group_ops,
3045 .ct_attrs = target_core_hba_attrs,
3046 .ct_owner = THIS_MODULE,
3047 };
3048
3049 static struct config_group *target_core_call_addhbatotarget(
3050 struct config_group *group,
3051 const char *name)
3052 {
3053 char *se_plugin_str, *str, *str2;
3054 struct se_hba *hba;
3055 char buf[TARGET_CORE_NAME_MAX_LEN];
3056 unsigned long plugin_dep_id = 0;
3057 int ret;
3058
3059 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3060 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3061 pr_err("Passed *name strlen(): %d exceeds"
3062 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3063 TARGET_CORE_NAME_MAX_LEN);
3064 return ERR_PTR(-ENAMETOOLONG);
3065 }
3066 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3067
3068 str = strstr(buf, "_");
3069 if (!str) {
3070 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3071 return ERR_PTR(-EINVAL);
3072 }
3073 se_plugin_str = buf;
3074 /*
3075 * Special case for subsystem plugins that have "_" in their names.
3076 * Namely rd_direct and rd_mcp..
3077 */
3078 str2 = strstr(str+1, "_");
3079 if (str2) {
3080 *str2 = '\0'; /* Terminate for *se_plugin_str */
3081 str2++; /* Skip to start of plugin dependent ID */
3082 str = str2;
3083 } else {
3084 *str = '\0'; /* Terminate for *se_plugin_str */
3085 str++; /* Skip to start of plugin dependent ID */
3086 }
3087
3088 ret = kstrtoul(str, 0, &plugin_dep_id);
3089 if (ret < 0) {
3090 pr_err("kstrtoul() returned %d for"
3091 " plugin_dep_id\n", ret);
3092 return ERR_PTR(ret);
3093 }
3094 /*
3095 * Load up TCM subsystem plugins if they have not already been loaded.
3096 */
3097 transport_subsystem_check_init();
3098
3099 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3100 if (IS_ERR(hba))
3101 return ERR_CAST(hba);
3102
3103 config_group_init_type_name(&hba->hba_group, name,
3104 &target_core_hba_cit);
3105
3106 return &hba->hba_group;
3107 }
3108
3109 static void target_core_call_delhbafromtarget(
3110 struct config_group *group,
3111 struct config_item *item)
3112 {
3113 /*
3114 * core_delete_hba() is called from target_core_hba_item_ops->release()
3115 * -> target_core_hba_release()
3116 */
3117 config_item_put(item);
3118 }
3119
3120 static struct configfs_group_operations target_core_group_ops = {
3121 .make_group = target_core_call_addhbatotarget,
3122 .drop_item = target_core_call_delhbafromtarget,
3123 };
3124
3125 static struct config_item_type target_core_cit = {
3126 .ct_item_ops = NULL,
3127 .ct_group_ops = &target_core_group_ops,
3128 .ct_attrs = NULL,
3129 .ct_owner = THIS_MODULE,
3130 };
3131
3132 /* Stop functions for struct config_item_type target_core_hba_cit */
3133
3134 void target_setup_backend_cits(struct target_backend *tb)
3135 {
3136 target_core_setup_dev_cit(tb);
3137 target_core_setup_dev_attrib_cit(tb);
3138 target_core_setup_dev_pr_cit(tb);
3139 target_core_setup_dev_wwn_cit(tb);
3140 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3141 target_core_setup_dev_stat_cit(tb);
3142 }
3143
3144 static int __init target_core_init_configfs(void)
3145 {
3146 struct configfs_subsystem *subsys = &target_core_fabrics;
3147 struct t10_alua_lu_gp *lu_gp;
3148 int ret;
3149
3150 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3151 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3152 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3153
3154 config_group_init(&subsys->su_group);
3155 mutex_init(&subsys->su_mutex);
3156
3157 ret = init_se_kmem_caches();
3158 if (ret < 0)
3159 return ret;
3160 /*
3161 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3162 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3163 */
3164 config_group_init_type_name(&target_core_hbagroup, "core",
3165 &target_core_cit);
3166 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3167
3168 /*
3169 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3170 */
3171 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3172 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3173
3174 /*
3175 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3176 * groups under /sys/kernel/config/target/core/alua/
3177 */
3178 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3179 &target_core_alua_lu_gps_cit);
3180 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3181
3182 /*
3183 * Add core/alua/lu_gps/default_lu_gp
3184 */
3185 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3186 if (IS_ERR(lu_gp)) {
3187 ret = -ENOMEM;
3188 goto out_global;
3189 }
3190
3191 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3192 &target_core_alua_lu_gp_cit);
3193 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3194
3195 default_lu_gp = lu_gp;
3196
3197 /*
3198 * Register the target_core_mod subsystem with configfs.
3199 */
3200 ret = configfs_register_subsystem(subsys);
3201 if (ret < 0) {
3202 pr_err("Error %d while registering subsystem %s\n",
3203 ret, subsys->su_group.cg_item.ci_namebuf);
3204 goto out_global;
3205 }
3206 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3207 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3208 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3209 /*
3210 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3211 */
3212 ret = rd_module_init();
3213 if (ret < 0)
3214 goto out;
3215
3216 ret = core_dev_setup_virtual_lun0();
3217 if (ret < 0)
3218 goto out;
3219
3220 ret = target_xcopy_setup_pt();
3221 if (ret < 0)
3222 goto out;
3223
3224 return 0;
3225
3226 out:
3227 configfs_unregister_subsystem(subsys);
3228 core_dev_release_virtual_lun0();
3229 rd_module_exit();
3230 out_global:
3231 if (default_lu_gp) {
3232 core_alua_free_lu_gp(default_lu_gp);
3233 default_lu_gp = NULL;
3234 }
3235 release_se_kmem_caches();
3236 return ret;
3237 }
3238
3239 static void __exit target_core_exit_configfs(void)
3240 {
3241 configfs_remove_default_groups(&alua_lu_gps_group);
3242 configfs_remove_default_groups(&alua_group);
3243 configfs_remove_default_groups(&target_core_hbagroup);
3244
3245 /*
3246 * We expect subsys->su_group.default_groups to be released
3247 * by configfs subsystem provider logic..
3248 */
3249 configfs_unregister_subsystem(&target_core_fabrics);
3250
3251 core_alua_free_lu_gp(default_lu_gp);
3252 default_lu_gp = NULL;
3253
3254 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3255 " Infrastructure\n");
3256
3257 core_dev_release_virtual_lun0();
3258 rd_module_exit();
3259 target_xcopy_release_pt();
3260 release_se_kmem_caches();
3261 }
3262
3263 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3264 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3265 MODULE_LICENSE("GPL");
3266
3267 module_init(target_core_init_configfs);
3268 module_exit(target_core_exit_configfs);
ubuntu-bionic-kernel mirror