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Merge tag 'mmc-v4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
[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 const struct config_item_type target_core_fabrics_item = {
311 .ct_group_ops = &target_core_fabric_group_ops,
312 .ct_attrs = target_core_fabric_item_attrs,
313 .ct_owner = THIS_MODULE,
314 };
315
316 static struct configfs_subsystem target_core_fabrics = {
317 .su_group = {
318 .cg_item = {
319 .ci_namebuf = "target",
320 .ci_type = &target_core_fabrics_item,
321 },
322 },
323 };
324
325 int target_depend_item(struct config_item *item)
326 {
327 return configfs_depend_item(&target_core_fabrics, item);
328 }
329 EXPORT_SYMBOL(target_depend_item);
330
331 void target_undepend_item(struct config_item *item)
332 {
333 return configfs_undepend_item(item);
334 }
335 EXPORT_SYMBOL(target_undepend_item);
336
337 /*##############################################################################
338 // Start functions called by external Target Fabrics Modules
339 //############################################################################*/
340
341 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
342 {
343 if (!tfo->name) {
344 pr_err("Missing tfo->name\n");
345 return -EINVAL;
346 }
347 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
348 pr_err("Passed name: %s exceeds TARGET_FABRIC"
349 "_NAME_SIZE\n", tfo->name);
350 return -EINVAL;
351 }
352 if (!tfo->get_fabric_name) {
353 pr_err("Missing tfo->get_fabric_name()\n");
354 return -EINVAL;
355 }
356 if (!tfo->tpg_get_wwn) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
358 return -EINVAL;
359 }
360 if (!tfo->tpg_get_tag) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_check_demo_mode) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_check_demo_mode_cache) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_check_demo_mode_write_protect) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_check_prod_mode_write_protect) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_inst_index) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
382 return -EINVAL;
383 }
384 if (!tfo->release_cmd) {
385 pr_err("Missing tfo->release_cmd()\n");
386 return -EINVAL;
387 }
388 if (!tfo->sess_get_index) {
389 pr_err("Missing tfo->sess_get_index()\n");
390 return -EINVAL;
391 }
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
394 return -EINVAL;
395 }
396 if (!tfo->write_pending_status) {
397 pr_err("Missing tfo->write_pending_status()\n");
398 return -EINVAL;
399 }
400 if (!tfo->set_default_node_attributes) {
401 pr_err("Missing tfo->set_default_node_attributes()\n");
402 return -EINVAL;
403 }
404 if (!tfo->get_cmd_state) {
405 pr_err("Missing tfo->get_cmd_state()\n");
406 return -EINVAL;
407 }
408 if (!tfo->queue_data_in) {
409 pr_err("Missing tfo->queue_data_in()\n");
410 return -EINVAL;
411 }
412 if (!tfo->queue_status) {
413 pr_err("Missing tfo->queue_status()\n");
414 return -EINVAL;
415 }
416 if (!tfo->queue_tm_rsp) {
417 pr_err("Missing tfo->queue_tm_rsp()\n");
418 return -EINVAL;
419 }
420 if (!tfo->aborted_task) {
421 pr_err("Missing tfo->aborted_task()\n");
422 return -EINVAL;
423 }
424 if (!tfo->check_stop_free) {
425 pr_err("Missing tfo->check_stop_free()\n");
426 return -EINVAL;
427 }
428 /*
429 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
430 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
431 * target_core_fabric_configfs.c WWN+TPG group context code.
432 */
433 if (!tfo->fabric_make_wwn) {
434 pr_err("Missing tfo->fabric_make_wwn()\n");
435 return -EINVAL;
436 }
437 if (!tfo->fabric_drop_wwn) {
438 pr_err("Missing tfo->fabric_drop_wwn()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fabric_make_tpg) {
442 pr_err("Missing tfo->fabric_make_tpg()\n");
443 return -EINVAL;
444 }
445 if (!tfo->fabric_drop_tpg) {
446 pr_err("Missing tfo->fabric_drop_tpg()\n");
447 return -EINVAL;
448 }
449
450 return 0;
451 }
452
453 int target_register_template(const struct target_core_fabric_ops *fo)
454 {
455 struct target_fabric_configfs *tf;
456 int ret;
457
458 ret = target_fabric_tf_ops_check(fo);
459 if (ret)
460 return ret;
461
462 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
463 if (!tf) {
464 pr_err("%s: could not allocate memory!\n", __func__);
465 return -ENOMEM;
466 }
467
468 INIT_LIST_HEAD(&tf->tf_list);
469 atomic_set(&tf->tf_access_cnt, 0);
470 tf->tf_ops = fo;
471 target_fabric_setup_cits(tf);
472
473 mutex_lock(&g_tf_lock);
474 list_add_tail(&tf->tf_list, &g_tf_list);
475 mutex_unlock(&g_tf_lock);
476
477 return 0;
478 }
479 EXPORT_SYMBOL(target_register_template);
480
481 void target_unregister_template(const struct target_core_fabric_ops *fo)
482 {
483 struct target_fabric_configfs *t;
484
485 mutex_lock(&g_tf_lock);
486 list_for_each_entry(t, &g_tf_list, tf_list) {
487 if (!strcmp(t->tf_ops->name, fo->name)) {
488 BUG_ON(atomic_read(&t->tf_access_cnt));
489 list_del(&t->tf_list);
490 mutex_unlock(&g_tf_lock);
491 /*
492 * Wait for any outstanding fabric se_deve_entry->rcu_head
493 * callbacks to complete post kfree_rcu(), before allowing
494 * fabric driver unload of TFO->module to proceed.
495 */
496 rcu_barrier();
497 kfree(t);
498 return;
499 }
500 }
501 mutex_unlock(&g_tf_lock);
502 }
503 EXPORT_SYMBOL(target_unregister_template);
504
505 /*##############################################################################
506 // Stop functions called by external Target Fabrics Modules
507 //############################################################################*/
508
509 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
510 {
511 return container_of(to_config_group(item), struct se_dev_attrib,
512 da_group);
513 }
514
515 /* Start functions for struct config_item_type tb_dev_attrib_cit */
516 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
517 static ssize_t _name##_show(struct config_item *item, char *page) \
518 { \
519 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
520 }
521
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
531 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
532 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
534 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
535 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_format);
536 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
537 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
538 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
539 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
540 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
541 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
542 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
543 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
544 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
545 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
546 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
547 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
548 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
549 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
550 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
551 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
552 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
553
554 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
555 static ssize_t _name##_store(struct config_item *item, const char *page,\
556 size_t count) \
557 { \
558 struct se_dev_attrib *da = to_attrib(item); \
559 u32 val; \
560 int ret; \
561 \
562 ret = kstrtou32(page, 0, &val); \
563 if (ret < 0) \
564 return ret; \
565 da->_name = val; \
566 return count; \
567 }
568
569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
571 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
572 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
573 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
574
575 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
576 static ssize_t _name##_store(struct config_item *item, const char *page, \
577 size_t count) \
578 { \
579 struct se_dev_attrib *da = to_attrib(item); \
580 bool flag; \
581 int ret; \
582 \
583 ret = strtobool(page, &flag); \
584 if (ret < 0) \
585 return ret; \
586 da->_name = flag; \
587 return count; \
588 }
589
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
593 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
594 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
595
596 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
597 static ssize_t _name##_store(struct config_item *item, const char *page,\
598 size_t count) \
599 { \
600 printk_once(KERN_WARNING \
601 "ignoring deprecated %s attribute\n", \
602 __stringify(_name)); \
603 return count; \
604 }
605
606 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
607 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
608
609 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
610 {
611 const char *configname;
612
613 configname = config_item_name(&dev->dev_group.cg_item);
614 if (strlen(configname) >= 16) {
615 pr_warn("dev[%p]: Backstore name '%s' is too long for "
616 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
617 configname);
618 }
619 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
620 }
621
622 static ssize_t emulate_model_alias_store(struct config_item *item,
623 const char *page, size_t count)
624 {
625 struct se_dev_attrib *da = to_attrib(item);
626 struct se_device *dev = da->da_dev;
627 bool flag;
628 int ret;
629
630 if (dev->export_count) {
631 pr_err("dev[%p]: Unable to change model alias"
632 " while export_count is %d\n",
633 dev, dev->export_count);
634 return -EINVAL;
635 }
636
637 ret = strtobool(page, &flag);
638 if (ret < 0)
639 return ret;
640
641 if (flag) {
642 dev_set_t10_wwn_model_alias(dev);
643 } else {
644 strncpy(&dev->t10_wwn.model[0],
645 dev->transport->inquiry_prod, 16);
646 }
647 da->emulate_model_alias = flag;
648 return count;
649 }
650
651 static ssize_t emulate_write_cache_store(struct config_item *item,
652 const char *page, size_t count)
653 {
654 struct se_dev_attrib *da = to_attrib(item);
655 bool flag;
656 int ret;
657
658 ret = strtobool(page, &flag);
659 if (ret < 0)
660 return ret;
661
662 if (flag && da->da_dev->transport->get_write_cache) {
663 pr_err("emulate_write_cache not supported for this device\n");
664 return -EINVAL;
665 }
666
667 da->emulate_write_cache = flag;
668 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
669 da->da_dev, flag);
670 return count;
671 }
672
673 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
674 const char *page, size_t count)
675 {
676 struct se_dev_attrib *da = to_attrib(item);
677 u32 val;
678 int ret;
679
680 ret = kstrtou32(page, 0, &val);
681 if (ret < 0)
682 return ret;
683
684 if (val != 0 && val != 1 && val != 2) {
685 pr_err("Illegal value %d\n", val);
686 return -EINVAL;
687 }
688
689 if (da->da_dev->export_count) {
690 pr_err("dev[%p]: Unable to change SE Device"
691 " UA_INTRLCK_CTRL while export_count is %d\n",
692 da->da_dev, da->da_dev->export_count);
693 return -EINVAL;
694 }
695 da->emulate_ua_intlck_ctrl = val;
696 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
697 da->da_dev, val);
698 return count;
699 }
700
701 static ssize_t emulate_tas_store(struct config_item *item,
702 const char *page, size_t count)
703 {
704 struct se_dev_attrib *da = to_attrib(item);
705 bool flag;
706 int ret;
707
708 ret = strtobool(page, &flag);
709 if (ret < 0)
710 return ret;
711
712 if (da->da_dev->export_count) {
713 pr_err("dev[%p]: Unable to change SE Device TAS while"
714 " export_count is %d\n",
715 da->da_dev, da->da_dev->export_count);
716 return -EINVAL;
717 }
718 da->emulate_tas = flag;
719 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
720 da->da_dev, flag ? "Enabled" : "Disabled");
721
722 return count;
723 }
724
725 static ssize_t emulate_tpu_store(struct config_item *item,
726 const char *page, size_t count)
727 {
728 struct se_dev_attrib *da = to_attrib(item);
729 bool flag;
730 int ret;
731
732 ret = strtobool(page, &flag);
733 if (ret < 0)
734 return ret;
735
736 /*
737 * We expect this value to be non-zero when generic Block Layer
738 * Discard supported is detected iblock_create_virtdevice().
739 */
740 if (flag && !da->max_unmap_block_desc_count) {
741 pr_err("Generic Block Discard not supported\n");
742 return -ENOSYS;
743 }
744
745 da->emulate_tpu = flag;
746 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
747 da->da_dev, flag);
748 return count;
749 }
750
751 static ssize_t emulate_tpws_store(struct config_item *item,
752 const char *page, size_t count)
753 {
754 struct se_dev_attrib *da = to_attrib(item);
755 bool flag;
756 int ret;
757
758 ret = strtobool(page, &flag);
759 if (ret < 0)
760 return ret;
761
762 /*
763 * We expect this value to be non-zero when generic Block Layer
764 * Discard supported is detected iblock_create_virtdevice().
765 */
766 if (flag && !da->max_unmap_block_desc_count) {
767 pr_err("Generic Block Discard not supported\n");
768 return -ENOSYS;
769 }
770
771 da->emulate_tpws = flag;
772 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
773 da->da_dev, flag);
774 return count;
775 }
776
777 static ssize_t pi_prot_type_store(struct config_item *item,
778 const char *page, size_t count)
779 {
780 struct se_dev_attrib *da = to_attrib(item);
781 int old_prot = da->pi_prot_type, ret;
782 struct se_device *dev = da->da_dev;
783 u32 flag;
784
785 ret = kstrtou32(page, 0, &flag);
786 if (ret < 0)
787 return ret;
788
789 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
790 pr_err("Illegal value %d for pi_prot_type\n", flag);
791 return -EINVAL;
792 }
793 if (flag == 2) {
794 pr_err("DIF TYPE2 protection currently not supported\n");
795 return -ENOSYS;
796 }
797 if (da->hw_pi_prot_type) {
798 pr_warn("DIF protection enabled on underlying hardware,"
799 " ignoring\n");
800 return count;
801 }
802 if (!dev->transport->init_prot || !dev->transport->free_prot) {
803 /* 0 is only allowed value for non-supporting backends */
804 if (flag == 0)
805 return count;
806
807 pr_err("DIF protection not supported by backend: %s\n",
808 dev->transport->name);
809 return -ENOSYS;
810 }
811 if (!(dev->dev_flags & DF_CONFIGURED)) {
812 pr_err("DIF protection requires device to be configured\n");
813 return -ENODEV;
814 }
815 if (dev->export_count) {
816 pr_err("dev[%p]: Unable to change SE Device PROT type while"
817 " export_count is %d\n", dev, dev->export_count);
818 return -EINVAL;
819 }
820
821 da->pi_prot_type = flag;
822
823 if (flag && !old_prot) {
824 ret = dev->transport->init_prot(dev);
825 if (ret) {
826 da->pi_prot_type = old_prot;
827 da->pi_prot_verify = (bool) da->pi_prot_type;
828 return ret;
829 }
830
831 } else if (!flag && old_prot) {
832 dev->transport->free_prot(dev);
833 }
834
835 da->pi_prot_verify = (bool) da->pi_prot_type;
836 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
837 return count;
838 }
839
840 static ssize_t pi_prot_format_store(struct config_item *item,
841 const char *page, size_t count)
842 {
843 struct se_dev_attrib *da = to_attrib(item);
844 struct se_device *dev = da->da_dev;
845 bool flag;
846 int ret;
847
848 ret = strtobool(page, &flag);
849 if (ret < 0)
850 return ret;
851
852 if (!flag)
853 return count;
854
855 if (!dev->transport->format_prot) {
856 pr_err("DIF protection format not supported by backend %s\n",
857 dev->transport->name);
858 return -ENOSYS;
859 }
860 if (!(dev->dev_flags & DF_CONFIGURED)) {
861 pr_err("DIF protection format requires device to be configured\n");
862 return -ENODEV;
863 }
864 if (dev->export_count) {
865 pr_err("dev[%p]: Unable to format SE Device PROT type while"
866 " export_count is %d\n", dev, dev->export_count);
867 return -EINVAL;
868 }
869
870 ret = dev->transport->format_prot(dev);
871 if (ret)
872 return ret;
873
874 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
875 return count;
876 }
877
878 static ssize_t pi_prot_verify_store(struct config_item *item,
879 const char *page, size_t count)
880 {
881 struct se_dev_attrib *da = to_attrib(item);
882 bool flag;
883 int ret;
884
885 ret = strtobool(page, &flag);
886 if (ret < 0)
887 return ret;
888
889 if (!flag) {
890 da->pi_prot_verify = flag;
891 return count;
892 }
893 if (da->hw_pi_prot_type) {
894 pr_warn("DIF protection enabled on underlying hardware,"
895 " ignoring\n");
896 return count;
897 }
898 if (!da->pi_prot_type) {
899 pr_warn("DIF protection not supported by backend, ignoring\n");
900 return count;
901 }
902 da->pi_prot_verify = flag;
903
904 return count;
905 }
906
907 static ssize_t force_pr_aptpl_store(struct config_item *item,
908 const char *page, size_t count)
909 {
910 struct se_dev_attrib *da = to_attrib(item);
911 bool flag;
912 int ret;
913
914 ret = strtobool(page, &flag);
915 if (ret < 0)
916 return ret;
917 if (da->da_dev->export_count) {
918 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
919 " export_count is %d\n",
920 da->da_dev, da->da_dev->export_count);
921 return -EINVAL;
922 }
923
924 da->force_pr_aptpl = flag;
925 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
926 return count;
927 }
928
929 static ssize_t emulate_rest_reord_store(struct config_item *item,
930 const char *page, size_t count)
931 {
932 struct se_dev_attrib *da = to_attrib(item);
933 bool flag;
934 int ret;
935
936 ret = strtobool(page, &flag);
937 if (ret < 0)
938 return ret;
939
940 if (flag != 0) {
941 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
942 " reordering not implemented\n", da->da_dev);
943 return -ENOSYS;
944 }
945 da->emulate_rest_reord = flag;
946 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
947 da->da_dev, flag);
948 return count;
949 }
950
951 static ssize_t unmap_zeroes_data_store(struct config_item *item,
952 const char *page, size_t count)
953 {
954 struct se_dev_attrib *da = to_attrib(item);
955 bool flag;
956 int ret;
957
958 ret = strtobool(page, &flag);
959 if (ret < 0)
960 return ret;
961
962 if (da->da_dev->export_count) {
963 pr_err("dev[%p]: Unable to change SE Device"
964 " unmap_zeroes_data while export_count is %d\n",
965 da->da_dev, da->da_dev->export_count);
966 return -EINVAL;
967 }
968 /*
969 * We expect this value to be non-zero when generic Block Layer
970 * Discard supported is detected iblock_configure_device().
971 */
972 if (flag && !da->max_unmap_block_desc_count) {
973 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
974 " because max_unmap_block_desc_count is zero\n",
975 da->da_dev);
976 return -ENOSYS;
977 }
978 da->unmap_zeroes_data = flag;
979 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
980 da->da_dev, flag);
981 return count;
982 }
983
984 /*
985 * Note, this can only be called on unexported SE Device Object.
986 */
987 static ssize_t queue_depth_store(struct config_item *item,
988 const char *page, size_t count)
989 {
990 struct se_dev_attrib *da = to_attrib(item);
991 struct se_device *dev = da->da_dev;
992 u32 val;
993 int ret;
994
995 ret = kstrtou32(page, 0, &val);
996 if (ret < 0)
997 return ret;
998
999 if (dev->export_count) {
1000 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1001 " export_count is %d\n",
1002 dev, dev->export_count);
1003 return -EINVAL;
1004 }
1005 if (!val) {
1006 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1007 return -EINVAL;
1008 }
1009
1010 if (val > dev->dev_attrib.queue_depth) {
1011 if (val > dev->dev_attrib.hw_queue_depth) {
1012 pr_err("dev[%p]: Passed queue_depth:"
1013 " %u exceeds TCM/SE_Device MAX"
1014 " TCQ: %u\n", dev, val,
1015 dev->dev_attrib.hw_queue_depth);
1016 return -EINVAL;
1017 }
1018 }
1019 da->queue_depth = dev->queue_depth = val;
1020 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1021 return count;
1022 }
1023
1024 static ssize_t optimal_sectors_store(struct config_item *item,
1025 const char *page, size_t count)
1026 {
1027 struct se_dev_attrib *da = to_attrib(item);
1028 u32 val;
1029 int ret;
1030
1031 ret = kstrtou32(page, 0, &val);
1032 if (ret < 0)
1033 return ret;
1034
1035 if (da->da_dev->export_count) {
1036 pr_err("dev[%p]: Unable to change SE Device"
1037 " optimal_sectors while export_count is %d\n",
1038 da->da_dev, da->da_dev->export_count);
1039 return -EINVAL;
1040 }
1041 if (val > da->hw_max_sectors) {
1042 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1043 " greater than hw_max_sectors: %u\n",
1044 da->da_dev, val, da->hw_max_sectors);
1045 return -EINVAL;
1046 }
1047
1048 da->optimal_sectors = val;
1049 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1050 da->da_dev, val);
1051 return count;
1052 }
1053
1054 static ssize_t block_size_store(struct config_item *item,
1055 const char *page, size_t count)
1056 {
1057 struct se_dev_attrib *da = to_attrib(item);
1058 u32 val;
1059 int ret;
1060
1061 ret = kstrtou32(page, 0, &val);
1062 if (ret < 0)
1063 return ret;
1064
1065 if (da->da_dev->export_count) {
1066 pr_err("dev[%p]: Unable to change SE Device block_size"
1067 " while export_count is %d\n",
1068 da->da_dev, da->da_dev->export_count);
1069 return -EINVAL;
1070 }
1071
1072 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1073 pr_err("dev[%p]: Illegal value for block_device: %u"
1074 " for SE device, must be 512, 1024, 2048 or 4096\n",
1075 da->da_dev, val);
1076 return -EINVAL;
1077 }
1078
1079 da->block_size = val;
1080 if (da->max_bytes_per_io)
1081 da->hw_max_sectors = da->max_bytes_per_io / val;
1082
1083 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1084 da->da_dev, val);
1085 return count;
1086 }
1087
1088 static ssize_t alua_support_show(struct config_item *item, char *page)
1089 {
1090 struct se_dev_attrib *da = to_attrib(item);
1091 u8 flags = da->da_dev->transport->transport_flags;
1092
1093 return snprintf(page, PAGE_SIZE, "%d\n",
1094 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1095 }
1096
1097 static ssize_t pgr_support_show(struct config_item *item, char *page)
1098 {
1099 struct se_dev_attrib *da = to_attrib(item);
1100 u8 flags = da->da_dev->transport->transport_flags;
1101
1102 return snprintf(page, PAGE_SIZE, "%d\n",
1103 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1104 }
1105
1106 CONFIGFS_ATTR(, emulate_model_alias);
1107 CONFIGFS_ATTR(, emulate_dpo);
1108 CONFIGFS_ATTR(, emulate_fua_write);
1109 CONFIGFS_ATTR(, emulate_fua_read);
1110 CONFIGFS_ATTR(, emulate_write_cache);
1111 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1112 CONFIGFS_ATTR(, emulate_tas);
1113 CONFIGFS_ATTR(, emulate_tpu);
1114 CONFIGFS_ATTR(, emulate_tpws);
1115 CONFIGFS_ATTR(, emulate_caw);
1116 CONFIGFS_ATTR(, emulate_3pc);
1117 CONFIGFS_ATTR(, pi_prot_type);
1118 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1119 CONFIGFS_ATTR(, pi_prot_format);
1120 CONFIGFS_ATTR(, pi_prot_verify);
1121 CONFIGFS_ATTR(, enforce_pr_isids);
1122 CONFIGFS_ATTR(, is_nonrot);
1123 CONFIGFS_ATTR(, emulate_rest_reord);
1124 CONFIGFS_ATTR(, force_pr_aptpl);
1125 CONFIGFS_ATTR_RO(, hw_block_size);
1126 CONFIGFS_ATTR(, block_size);
1127 CONFIGFS_ATTR_RO(, hw_max_sectors);
1128 CONFIGFS_ATTR(, optimal_sectors);
1129 CONFIGFS_ATTR_RO(, hw_queue_depth);
1130 CONFIGFS_ATTR(, queue_depth);
1131 CONFIGFS_ATTR(, max_unmap_lba_count);
1132 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1133 CONFIGFS_ATTR(, unmap_granularity);
1134 CONFIGFS_ATTR(, unmap_granularity_alignment);
1135 CONFIGFS_ATTR(, unmap_zeroes_data);
1136 CONFIGFS_ATTR(, max_write_same_len);
1137 CONFIGFS_ATTR_RO(, alua_support);
1138 CONFIGFS_ATTR_RO(, pgr_support);
1139
1140 /*
1141 * dev_attrib attributes for devices using the target core SBC/SPC
1142 * interpreter. Any backend using spc_parse_cdb should be using
1143 * these.
1144 */
1145 struct configfs_attribute *sbc_attrib_attrs[] = {
1146 &attr_emulate_model_alias,
1147 &attr_emulate_dpo,
1148 &attr_emulate_fua_write,
1149 &attr_emulate_fua_read,
1150 &attr_emulate_write_cache,
1151 &attr_emulate_ua_intlck_ctrl,
1152 &attr_emulate_tas,
1153 &attr_emulate_tpu,
1154 &attr_emulate_tpws,
1155 &attr_emulate_caw,
1156 &attr_emulate_3pc,
1157 &attr_pi_prot_type,
1158 &attr_hw_pi_prot_type,
1159 &attr_pi_prot_format,
1160 &attr_pi_prot_verify,
1161 &attr_enforce_pr_isids,
1162 &attr_is_nonrot,
1163 &attr_emulate_rest_reord,
1164 &attr_force_pr_aptpl,
1165 &attr_hw_block_size,
1166 &attr_block_size,
1167 &attr_hw_max_sectors,
1168 &attr_optimal_sectors,
1169 &attr_hw_queue_depth,
1170 &attr_queue_depth,
1171 &attr_max_unmap_lba_count,
1172 &attr_max_unmap_block_desc_count,
1173 &attr_unmap_granularity,
1174 &attr_unmap_granularity_alignment,
1175 &attr_unmap_zeroes_data,
1176 &attr_max_write_same_len,
1177 &attr_alua_support,
1178 &attr_pgr_support,
1179 NULL,
1180 };
1181 EXPORT_SYMBOL(sbc_attrib_attrs);
1182
1183 /*
1184 * Minimal dev_attrib attributes for devices passing through CDBs.
1185 * In this case we only provide a few read-only attributes for
1186 * backwards compatibility.
1187 */
1188 struct configfs_attribute *passthrough_attrib_attrs[] = {
1189 &attr_hw_pi_prot_type,
1190 &attr_hw_block_size,
1191 &attr_hw_max_sectors,
1192 &attr_hw_queue_depth,
1193 &attr_alua_support,
1194 &attr_pgr_support,
1195 NULL,
1196 };
1197 EXPORT_SYMBOL(passthrough_attrib_attrs);
1198
1199 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1200
1201 /* End functions for struct config_item_type tb_dev_attrib_cit */
1202
1203 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1204
1205 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1206 {
1207 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1208 }
1209
1210 /*
1211 * VPD page 0x80 Unit serial
1212 */
1213 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1214 char *page)
1215 {
1216 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1217 &to_t10_wwn(item)->unit_serial[0]);
1218 }
1219
1220 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1221 const char *page, size_t count)
1222 {
1223 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1224 struct se_device *dev = t10_wwn->t10_dev;
1225 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1226
1227 /*
1228 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1229 * from the struct scsi_device level firmware, do not allow
1230 * VPD Unit Serial to be emulated.
1231 *
1232 * Note this struct scsi_device could also be emulating VPD
1233 * information from its drivers/scsi LLD. But for now we assume
1234 * it is doing 'the right thing' wrt a world wide unique
1235 * VPD Unit Serial Number that OS dependent multipath can depend on.
1236 */
1237 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1238 pr_err("Underlying SCSI device firmware provided VPD"
1239 " Unit Serial, ignoring request\n");
1240 return -EOPNOTSUPP;
1241 }
1242
1243 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1244 pr_err("Emulated VPD Unit Serial exceeds"
1245 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1246 return -EOVERFLOW;
1247 }
1248 /*
1249 * Check to see if any active $FABRIC_MOD exports exist. If they
1250 * do exist, fail here as changing this information on the fly
1251 * (underneath the initiator side OS dependent multipath code)
1252 * could cause negative effects.
1253 */
1254 if (dev->export_count) {
1255 pr_err("Unable to set VPD Unit Serial while"
1256 " active %d $FABRIC_MOD exports exist\n",
1257 dev->export_count);
1258 return -EINVAL;
1259 }
1260
1261 /*
1262 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1263 *
1264 * Also, strip any newline added from the userspace
1265 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1266 */
1267 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1268 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1269 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1270 "%s", strstrip(buf));
1271 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1272
1273 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1274 " %s\n", dev->t10_wwn.unit_serial);
1275
1276 return count;
1277 }
1278
1279 /*
1280 * VPD page 0x83 Protocol Identifier
1281 */
1282 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1283 char *page)
1284 {
1285 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1286 struct t10_vpd *vpd;
1287 unsigned char buf[VPD_TMP_BUF_SIZE];
1288 ssize_t len = 0;
1289
1290 memset(buf, 0, VPD_TMP_BUF_SIZE);
1291
1292 spin_lock(&t10_wwn->t10_vpd_lock);
1293 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1294 if (!vpd->protocol_identifier_set)
1295 continue;
1296
1297 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1298
1299 if (len + strlen(buf) >= PAGE_SIZE)
1300 break;
1301
1302 len += sprintf(page+len, "%s", buf);
1303 }
1304 spin_unlock(&t10_wwn->t10_vpd_lock);
1305
1306 return len;
1307 }
1308
1309 /*
1310 * Generic wrapper for dumping VPD identifiers by association.
1311 */
1312 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1313 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1314 char *page) \
1315 { \
1316 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1317 struct t10_vpd *vpd; \
1318 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1319 ssize_t len = 0; \
1320 \
1321 spin_lock(&t10_wwn->t10_vpd_lock); \
1322 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1323 if (vpd->association != _assoc) \
1324 continue; \
1325 \
1326 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1327 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1328 if (len + strlen(buf) >= PAGE_SIZE) \
1329 break; \
1330 len += sprintf(page+len, "%s", buf); \
1331 \
1332 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1333 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1334 if (len + strlen(buf) >= PAGE_SIZE) \
1335 break; \
1336 len += sprintf(page+len, "%s", buf); \
1337 \
1338 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1339 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1340 if (len + strlen(buf) >= PAGE_SIZE) \
1341 break; \
1342 len += sprintf(page+len, "%s", buf); \
1343 } \
1344 spin_unlock(&t10_wwn->t10_vpd_lock); \
1345 \
1346 return len; \
1347 }
1348
1349 /* VPD page 0x83 Association: Logical Unit */
1350 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1351 /* VPD page 0x83 Association: Target Port */
1352 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1353 /* VPD page 0x83 Association: SCSI Target Device */
1354 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1355
1356 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1357 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1358 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1359 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1360 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1361
1362 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1363 &target_wwn_attr_vpd_unit_serial,
1364 &target_wwn_attr_vpd_protocol_identifier,
1365 &target_wwn_attr_vpd_assoc_logical_unit,
1366 &target_wwn_attr_vpd_assoc_target_port,
1367 &target_wwn_attr_vpd_assoc_scsi_target_device,
1368 NULL,
1369 };
1370
1371 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1372
1373 /* End functions for struct config_item_type tb_dev_wwn_cit */
1374
1375 /* Start functions for struct config_item_type tb_dev_pr_cit */
1376
1377 static struct se_device *pr_to_dev(struct config_item *item)
1378 {
1379 return container_of(to_config_group(item), struct se_device,
1380 dev_pr_group);
1381 }
1382
1383 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1384 char *page)
1385 {
1386 struct se_node_acl *se_nacl;
1387 struct t10_pr_registration *pr_reg;
1388 char i_buf[PR_REG_ISID_ID_LEN];
1389
1390 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1391
1392 pr_reg = dev->dev_pr_res_holder;
1393 if (!pr_reg)
1394 return sprintf(page, "No SPC-3 Reservation holder\n");
1395
1396 se_nacl = pr_reg->pr_reg_nacl;
1397 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1398
1399 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1400 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1401 se_nacl->initiatorname, i_buf);
1402 }
1403
1404 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1405 char *page)
1406 {
1407 struct se_node_acl *se_nacl;
1408 ssize_t len;
1409
1410 se_nacl = dev->dev_reserved_node_acl;
1411 if (se_nacl) {
1412 len = sprintf(page,
1413 "SPC-2 Reservation: %s Initiator: %s\n",
1414 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1415 se_nacl->initiatorname);
1416 } else {
1417 len = sprintf(page, "No SPC-2 Reservation holder\n");
1418 }
1419 return len;
1420 }
1421
1422 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1423 {
1424 struct se_device *dev = pr_to_dev(item);
1425 int ret;
1426
1427 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1428 return sprintf(page, "Passthrough\n");
1429
1430 spin_lock(&dev->dev_reservation_lock);
1431 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1432 ret = target_core_dev_pr_show_spc2_res(dev, page);
1433 else
1434 ret = target_core_dev_pr_show_spc3_res(dev, page);
1435 spin_unlock(&dev->dev_reservation_lock);
1436 return ret;
1437 }
1438
1439 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1440 char *page)
1441 {
1442 struct se_device *dev = pr_to_dev(item);
1443 ssize_t len = 0;
1444
1445 spin_lock(&dev->dev_reservation_lock);
1446 if (!dev->dev_pr_res_holder) {
1447 len = sprintf(page, "No SPC-3 Reservation holder\n");
1448 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1449 len = sprintf(page, "SPC-3 Reservation: All Target"
1450 " Ports registration\n");
1451 } else {
1452 len = sprintf(page, "SPC-3 Reservation: Single"
1453 " Target Port registration\n");
1454 }
1455
1456 spin_unlock(&dev->dev_reservation_lock);
1457 return len;
1458 }
1459
1460 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1461 char *page)
1462 {
1463 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1464 }
1465
1466
1467 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1468 char *page)
1469 {
1470 struct se_device *dev = pr_to_dev(item);
1471 struct se_node_acl *se_nacl;
1472 struct se_portal_group *se_tpg;
1473 struct t10_pr_registration *pr_reg;
1474 const struct target_core_fabric_ops *tfo;
1475 ssize_t len = 0;
1476
1477 spin_lock(&dev->dev_reservation_lock);
1478 pr_reg = dev->dev_pr_res_holder;
1479 if (!pr_reg) {
1480 len = sprintf(page, "No SPC-3 Reservation holder\n");
1481 goto out_unlock;
1482 }
1483
1484 se_nacl = pr_reg->pr_reg_nacl;
1485 se_tpg = se_nacl->se_tpg;
1486 tfo = se_tpg->se_tpg_tfo;
1487
1488 len += sprintf(page+len, "SPC-3 Reservation: %s"
1489 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1490 tfo->tpg_get_wwn(se_tpg));
1491 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1492 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1493 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1494 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1495 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1496
1497 out_unlock:
1498 spin_unlock(&dev->dev_reservation_lock);
1499 return len;
1500 }
1501
1502
1503 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1504 char *page)
1505 {
1506 struct se_device *dev = pr_to_dev(item);
1507 const struct target_core_fabric_ops *tfo;
1508 struct t10_pr_registration *pr_reg;
1509 unsigned char buf[384];
1510 char i_buf[PR_REG_ISID_ID_LEN];
1511 ssize_t len = 0;
1512 int reg_count = 0;
1513
1514 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1515
1516 spin_lock(&dev->t10_pr.registration_lock);
1517 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1518 pr_reg_list) {
1519
1520 memset(buf, 0, 384);
1521 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1522 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1523 core_pr_dump_initiator_port(pr_reg, i_buf,
1524 PR_REG_ISID_ID_LEN);
1525 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1526 tfo->get_fabric_name(),
1527 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1528 pr_reg->pr_res_generation);
1529
1530 if (len + strlen(buf) >= PAGE_SIZE)
1531 break;
1532
1533 len += sprintf(page+len, "%s", buf);
1534 reg_count++;
1535 }
1536 spin_unlock(&dev->t10_pr.registration_lock);
1537
1538 if (!reg_count)
1539 len += sprintf(page+len, "None\n");
1540
1541 return len;
1542 }
1543
1544 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1545 {
1546 struct se_device *dev = pr_to_dev(item);
1547 struct t10_pr_registration *pr_reg;
1548 ssize_t len = 0;
1549
1550 spin_lock(&dev->dev_reservation_lock);
1551 pr_reg = dev->dev_pr_res_holder;
1552 if (pr_reg) {
1553 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1554 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1555 } else {
1556 len = sprintf(page, "No SPC-3 Reservation holder\n");
1557 }
1558
1559 spin_unlock(&dev->dev_reservation_lock);
1560 return len;
1561 }
1562
1563 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1564 {
1565 struct se_device *dev = pr_to_dev(item);
1566
1567 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1568 return sprintf(page, "SPC_PASSTHROUGH\n");
1569 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1570 return sprintf(page, "SPC2_RESERVATIONS\n");
1571 else
1572 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1573 }
1574
1575 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1576 char *page)
1577 {
1578 struct se_device *dev = pr_to_dev(item);
1579
1580 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1581 return 0;
1582
1583 return sprintf(page, "APTPL Bit Status: %s\n",
1584 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1585 }
1586
1587 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1588 char *page)
1589 {
1590 struct se_device *dev = pr_to_dev(item);
1591
1592 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1593 return 0;
1594
1595 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1596 }
1597
1598 enum {
1599 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1600 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1601 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1602 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1603 };
1604
1605 static match_table_t tokens = {
1606 {Opt_initiator_fabric, "initiator_fabric=%s"},
1607 {Opt_initiator_node, "initiator_node=%s"},
1608 {Opt_initiator_sid, "initiator_sid=%s"},
1609 {Opt_sa_res_key, "sa_res_key=%s"},
1610 {Opt_res_holder, "res_holder=%d"},
1611 {Opt_res_type, "res_type=%d"},
1612 {Opt_res_scope, "res_scope=%d"},
1613 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1614 {Opt_mapped_lun, "mapped_lun=%u"},
1615 {Opt_target_fabric, "target_fabric=%s"},
1616 {Opt_target_node, "target_node=%s"},
1617 {Opt_tpgt, "tpgt=%d"},
1618 {Opt_port_rtpi, "port_rtpi=%d"},
1619 {Opt_target_lun, "target_lun=%u"},
1620 {Opt_err, NULL}
1621 };
1622
1623 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1624 const char *page, size_t count)
1625 {
1626 struct se_device *dev = pr_to_dev(item);
1627 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1628 unsigned char *t_fabric = NULL, *t_port = NULL;
1629 char *orig, *ptr, *opts;
1630 substring_t args[MAX_OPT_ARGS];
1631 unsigned long long tmp_ll;
1632 u64 sa_res_key = 0;
1633 u64 mapped_lun = 0, target_lun = 0;
1634 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1635 u16 tpgt = 0;
1636 u8 type = 0;
1637
1638 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1639 return count;
1640 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1641 return count;
1642
1643 if (dev->export_count) {
1644 pr_debug("Unable to process APTPL metadata while"
1645 " active fabric exports exist\n");
1646 return -EINVAL;
1647 }
1648
1649 opts = kstrdup(page, GFP_KERNEL);
1650 if (!opts)
1651 return -ENOMEM;
1652
1653 orig = opts;
1654 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1655 if (!*ptr)
1656 continue;
1657
1658 token = match_token(ptr, tokens, args);
1659 switch (token) {
1660 case Opt_initiator_fabric:
1661 i_fabric = match_strdup(args);
1662 if (!i_fabric) {
1663 ret = -ENOMEM;
1664 goto out;
1665 }
1666 break;
1667 case Opt_initiator_node:
1668 i_port = match_strdup(args);
1669 if (!i_port) {
1670 ret = -ENOMEM;
1671 goto out;
1672 }
1673 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1674 pr_err("APTPL metadata initiator_node="
1675 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1676 PR_APTPL_MAX_IPORT_LEN);
1677 ret = -EINVAL;
1678 break;
1679 }
1680 break;
1681 case Opt_initiator_sid:
1682 isid = match_strdup(args);
1683 if (!isid) {
1684 ret = -ENOMEM;
1685 goto out;
1686 }
1687 if (strlen(isid) >= PR_REG_ISID_LEN) {
1688 pr_err("APTPL metadata initiator_isid"
1689 "= exceeds PR_REG_ISID_LEN: %d\n",
1690 PR_REG_ISID_LEN);
1691 ret = -EINVAL;
1692 break;
1693 }
1694 break;
1695 case Opt_sa_res_key:
1696 ret = match_u64(args, &tmp_ll);
1697 if (ret < 0) {
1698 pr_err("kstrtoull() failed for sa_res_key=\n");
1699 goto out;
1700 }
1701 sa_res_key = (u64)tmp_ll;
1702 break;
1703 /*
1704 * PR APTPL Metadata for Reservation
1705 */
1706 case Opt_res_holder:
1707 ret = match_int(args, &arg);
1708 if (ret)
1709 goto out;
1710 res_holder = arg;
1711 break;
1712 case Opt_res_type:
1713 ret = match_int(args, &arg);
1714 if (ret)
1715 goto out;
1716 type = (u8)arg;
1717 break;
1718 case Opt_res_scope:
1719 ret = match_int(args, &arg);
1720 if (ret)
1721 goto out;
1722 break;
1723 case Opt_res_all_tg_pt:
1724 ret = match_int(args, &arg);
1725 if (ret)
1726 goto out;
1727 all_tg_pt = (int)arg;
1728 break;
1729 case Opt_mapped_lun:
1730 ret = match_u64(args, &tmp_ll);
1731 if (ret)
1732 goto out;
1733 mapped_lun = (u64)tmp_ll;
1734 break;
1735 /*
1736 * PR APTPL Metadata for Target Port
1737 */
1738 case Opt_target_fabric:
1739 t_fabric = match_strdup(args);
1740 if (!t_fabric) {
1741 ret = -ENOMEM;
1742 goto out;
1743 }
1744 break;
1745 case Opt_target_node:
1746 t_port = match_strdup(args);
1747 if (!t_port) {
1748 ret = -ENOMEM;
1749 goto out;
1750 }
1751 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1752 pr_err("APTPL metadata target_node="
1753 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1754 PR_APTPL_MAX_TPORT_LEN);
1755 ret = -EINVAL;
1756 break;
1757 }
1758 break;
1759 case Opt_tpgt:
1760 ret = match_int(args, &arg);
1761 if (ret)
1762 goto out;
1763 tpgt = (u16)arg;
1764 break;
1765 case Opt_port_rtpi:
1766 ret = match_int(args, &arg);
1767 if (ret)
1768 goto out;
1769 break;
1770 case Opt_target_lun:
1771 ret = match_u64(args, &tmp_ll);
1772 if (ret)
1773 goto out;
1774 target_lun = (u64)tmp_ll;
1775 break;
1776 default:
1777 break;
1778 }
1779 }
1780
1781 if (!i_port || !t_port || !sa_res_key) {
1782 pr_err("Illegal parameters for APTPL registration\n");
1783 ret = -EINVAL;
1784 goto out;
1785 }
1786
1787 if (res_holder && !(type)) {
1788 pr_err("Illegal PR type: 0x%02x for reservation"
1789 " holder\n", type);
1790 ret = -EINVAL;
1791 goto out;
1792 }
1793
1794 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1795 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1796 res_holder, all_tg_pt, type);
1797 out:
1798 kfree(i_fabric);
1799 kfree(i_port);
1800 kfree(isid);
1801 kfree(t_fabric);
1802 kfree(t_port);
1803 kfree(orig);
1804 return (ret == 0) ? count : ret;
1805 }
1806
1807
1808 CONFIGFS_ATTR_RO(target_pr_, res_holder);
1809 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
1810 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
1811 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
1812 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
1813 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
1814 CONFIGFS_ATTR_RO(target_pr_, res_type);
1815 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
1816 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
1817
1818 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1819 &target_pr_attr_res_holder,
1820 &target_pr_attr_res_pr_all_tgt_pts,
1821 &target_pr_attr_res_pr_generation,
1822 &target_pr_attr_res_pr_holder_tg_port,
1823 &target_pr_attr_res_pr_registered_i_pts,
1824 &target_pr_attr_res_pr_type,
1825 &target_pr_attr_res_type,
1826 &target_pr_attr_res_aptpl_active,
1827 &target_pr_attr_res_aptpl_metadata,
1828 NULL,
1829 };
1830
1831 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
1832
1833 /* End functions for struct config_item_type tb_dev_pr_cit */
1834
1835 /* Start functions for struct config_item_type tb_dev_cit */
1836
1837 static inline struct se_device *to_device(struct config_item *item)
1838 {
1839 return container_of(to_config_group(item), struct se_device, dev_group);
1840 }
1841
1842 static ssize_t target_dev_info_show(struct config_item *item, char *page)
1843 {
1844 struct se_device *dev = to_device(item);
1845 int bl = 0;
1846 ssize_t read_bytes = 0;
1847
1848 transport_dump_dev_state(dev, page, &bl);
1849 read_bytes += bl;
1850 read_bytes += dev->transport->show_configfs_dev_params(dev,
1851 page+read_bytes);
1852 return read_bytes;
1853 }
1854
1855 static ssize_t target_dev_control_store(struct config_item *item,
1856 const char *page, size_t count)
1857 {
1858 struct se_device *dev = to_device(item);
1859
1860 return dev->transport->set_configfs_dev_params(dev, page, count);
1861 }
1862
1863 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
1864 {
1865 struct se_device *dev = to_device(item);
1866
1867 if (!(dev->dev_flags & DF_USING_ALIAS))
1868 return 0;
1869
1870 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1871 }
1872
1873 static ssize_t target_dev_alias_store(struct config_item *item,
1874 const char *page, size_t count)
1875 {
1876 struct se_device *dev = to_device(item);
1877 struct se_hba *hba = dev->se_hba;
1878 ssize_t read_bytes;
1879
1880 if (count > (SE_DEV_ALIAS_LEN-1)) {
1881 pr_err("alias count: %d exceeds"
1882 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1883 SE_DEV_ALIAS_LEN-1);
1884 return -EINVAL;
1885 }
1886
1887 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1888 if (!read_bytes)
1889 return -EINVAL;
1890 if (dev->dev_alias[read_bytes - 1] == '\n')
1891 dev->dev_alias[read_bytes - 1] = '\0';
1892
1893 dev->dev_flags |= DF_USING_ALIAS;
1894
1895 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1896 config_item_name(&hba->hba_group.cg_item),
1897 config_item_name(&dev->dev_group.cg_item),
1898 dev->dev_alias);
1899
1900 return read_bytes;
1901 }
1902
1903 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
1904 {
1905 struct se_device *dev = to_device(item);
1906
1907 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1908 return 0;
1909
1910 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1911 }
1912
1913 static ssize_t target_dev_udev_path_store(struct config_item *item,
1914 const char *page, size_t count)
1915 {
1916 struct se_device *dev = to_device(item);
1917 struct se_hba *hba = dev->se_hba;
1918 ssize_t read_bytes;
1919
1920 if (count > (SE_UDEV_PATH_LEN-1)) {
1921 pr_err("udev_path count: %d exceeds"
1922 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1923 SE_UDEV_PATH_LEN-1);
1924 return -EINVAL;
1925 }
1926
1927 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1928 "%s", page);
1929 if (!read_bytes)
1930 return -EINVAL;
1931 if (dev->udev_path[read_bytes - 1] == '\n')
1932 dev->udev_path[read_bytes - 1] = '\0';
1933
1934 dev->dev_flags |= DF_USING_UDEV_PATH;
1935
1936 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1937 config_item_name(&hba->hba_group.cg_item),
1938 config_item_name(&dev->dev_group.cg_item),
1939 dev->udev_path);
1940
1941 return read_bytes;
1942 }
1943
1944 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
1945 {
1946 struct se_device *dev = to_device(item);
1947
1948 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1949 }
1950
1951 static ssize_t target_dev_enable_store(struct config_item *item,
1952 const char *page, size_t count)
1953 {
1954 struct se_device *dev = to_device(item);
1955 char *ptr;
1956 int ret;
1957
1958 ptr = strstr(page, "1");
1959 if (!ptr) {
1960 pr_err("For dev_enable ops, only valid value"
1961 " is \"1\"\n");
1962 return -EINVAL;
1963 }
1964
1965 ret = target_configure_device(dev);
1966 if (ret)
1967 return ret;
1968 return count;
1969 }
1970
1971 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
1972 {
1973 struct se_device *dev = to_device(item);
1974 struct config_item *lu_ci;
1975 struct t10_alua_lu_gp *lu_gp;
1976 struct t10_alua_lu_gp_member *lu_gp_mem;
1977 ssize_t len = 0;
1978
1979 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1980 if (!lu_gp_mem)
1981 return 0;
1982
1983 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1984 lu_gp = lu_gp_mem->lu_gp;
1985 if (lu_gp) {
1986 lu_ci = &lu_gp->lu_gp_group.cg_item;
1987 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1988 config_item_name(lu_ci), lu_gp->lu_gp_id);
1989 }
1990 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1991
1992 return len;
1993 }
1994
1995 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
1996 const char *page, size_t count)
1997 {
1998 struct se_device *dev = to_device(item);
1999 struct se_hba *hba = dev->se_hba;
2000 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2001 struct t10_alua_lu_gp_member *lu_gp_mem;
2002 unsigned char buf[LU_GROUP_NAME_BUF];
2003 int move = 0;
2004
2005 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2006 if (!lu_gp_mem)
2007 return count;
2008
2009 if (count > LU_GROUP_NAME_BUF) {
2010 pr_err("ALUA LU Group Alias too large!\n");
2011 return -EINVAL;
2012 }
2013 memset(buf, 0, LU_GROUP_NAME_BUF);
2014 memcpy(buf, page, count);
2015 /*
2016 * Any ALUA logical unit alias besides "NULL" means we will be
2017 * making a new group association.
2018 */
2019 if (strcmp(strstrip(buf), "NULL")) {
2020 /*
2021 * core_alua_get_lu_gp_by_name() will increment reference to
2022 * struct t10_alua_lu_gp. This reference is released with
2023 * core_alua_get_lu_gp_by_name below().
2024 */
2025 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2026 if (!lu_gp_new)
2027 return -ENODEV;
2028 }
2029
2030 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2031 lu_gp = lu_gp_mem->lu_gp;
2032 if (lu_gp) {
2033 /*
2034 * Clearing an existing lu_gp association, and replacing
2035 * with NULL
2036 */
2037 if (!lu_gp_new) {
2038 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2039 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2040 " %hu\n",
2041 config_item_name(&hba->hba_group.cg_item),
2042 config_item_name(&dev->dev_group.cg_item),
2043 config_item_name(&lu_gp->lu_gp_group.cg_item),
2044 lu_gp->lu_gp_id);
2045
2046 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2047 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2048
2049 return count;
2050 }
2051 /*
2052 * Removing existing association of lu_gp_mem with lu_gp
2053 */
2054 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2055 move = 1;
2056 }
2057 /*
2058 * Associate lu_gp_mem with lu_gp_new.
2059 */
2060 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2061 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2062
2063 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2064 " core/alua/lu_gps/%s, ID: %hu\n",
2065 (move) ? "Moving" : "Adding",
2066 config_item_name(&hba->hba_group.cg_item),
2067 config_item_name(&dev->dev_group.cg_item),
2068 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2069 lu_gp_new->lu_gp_id);
2070
2071 core_alua_put_lu_gp_from_name(lu_gp_new);
2072 return count;
2073 }
2074
2075 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2076 {
2077 struct se_device *dev = to_device(item);
2078 struct t10_alua_lba_map *map;
2079 struct t10_alua_lba_map_member *mem;
2080 char *b = page;
2081 int bl = 0;
2082 char state;
2083
2084 spin_lock(&dev->t10_alua.lba_map_lock);
2085 if (!list_empty(&dev->t10_alua.lba_map_list))
2086 bl += sprintf(b + bl, "%u %u\n",
2087 dev->t10_alua.lba_map_segment_size,
2088 dev->t10_alua.lba_map_segment_multiplier);
2089 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2090 bl += sprintf(b + bl, "%llu %llu",
2091 map->lba_map_first_lba, map->lba_map_last_lba);
2092 list_for_each_entry(mem, &map->lba_map_mem_list,
2093 lba_map_mem_list) {
2094 switch (mem->lba_map_mem_alua_state) {
2095 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2096 state = 'O';
2097 break;
2098 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2099 state = 'A';
2100 break;
2101 case ALUA_ACCESS_STATE_STANDBY:
2102 state = 'S';
2103 break;
2104 case ALUA_ACCESS_STATE_UNAVAILABLE:
2105 state = 'U';
2106 break;
2107 default:
2108 state = '.';
2109 break;
2110 }
2111 bl += sprintf(b + bl, " %d:%c",
2112 mem->lba_map_mem_alua_pg_id, state);
2113 }
2114 bl += sprintf(b + bl, "\n");
2115 }
2116 spin_unlock(&dev->t10_alua.lba_map_lock);
2117 return bl;
2118 }
2119
2120 static ssize_t target_dev_lba_map_store(struct config_item *item,
2121 const char *page, size_t count)
2122 {
2123 struct se_device *dev = to_device(item);
2124 struct t10_alua_lba_map *lba_map = NULL;
2125 struct list_head lba_list;
2126 char *map_entries, *orig, *ptr;
2127 char state;
2128 int pg_num = -1, pg;
2129 int ret = 0, num = 0, pg_id, alua_state;
2130 unsigned long start_lba = -1, end_lba = -1;
2131 unsigned long segment_size = -1, segment_mult = -1;
2132
2133 orig = map_entries = kstrdup(page, GFP_KERNEL);
2134 if (!map_entries)
2135 return -ENOMEM;
2136
2137 INIT_LIST_HEAD(&lba_list);
2138 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2139 if (!*ptr)
2140 continue;
2141
2142 if (num == 0) {
2143 if (sscanf(ptr, "%lu %lu\n",
2144 &segment_size, &segment_mult) != 2) {
2145 pr_err("Invalid line %d\n", num);
2146 ret = -EINVAL;
2147 break;
2148 }
2149 num++;
2150 continue;
2151 }
2152 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2153 pr_err("Invalid line %d\n", num);
2154 ret = -EINVAL;
2155 break;
2156 }
2157 ptr = strchr(ptr, ' ');
2158 if (!ptr) {
2159 pr_err("Invalid line %d, missing end lba\n", num);
2160 ret = -EINVAL;
2161 break;
2162 }
2163 ptr++;
2164 ptr = strchr(ptr, ' ');
2165 if (!ptr) {
2166 pr_err("Invalid line %d, missing state definitions\n",
2167 num);
2168 ret = -EINVAL;
2169 break;
2170 }
2171 ptr++;
2172 lba_map = core_alua_allocate_lba_map(&lba_list,
2173 start_lba, end_lba);
2174 if (IS_ERR(lba_map)) {
2175 ret = PTR_ERR(lba_map);
2176 break;
2177 }
2178 pg = 0;
2179 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2180 switch (state) {
2181 case 'O':
2182 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2183 break;
2184 case 'A':
2185 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2186 break;
2187 case 'S':
2188 alua_state = ALUA_ACCESS_STATE_STANDBY;
2189 break;
2190 case 'U':
2191 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2192 break;
2193 default:
2194 pr_err("Invalid ALUA state '%c'\n", state);
2195 ret = -EINVAL;
2196 goto out;
2197 }
2198
2199 ret = core_alua_allocate_lba_map_mem(lba_map,
2200 pg_id, alua_state);
2201 if (ret) {
2202 pr_err("Invalid target descriptor %d:%c "
2203 "at line %d\n",
2204 pg_id, state, num);
2205 break;
2206 }
2207 pg++;
2208 ptr = strchr(ptr, ' ');
2209 if (ptr)
2210 ptr++;
2211 else
2212 break;
2213 }
2214 if (pg_num == -1)
2215 pg_num = pg;
2216 else if (pg != pg_num) {
2217 pr_err("Only %d from %d port groups definitions "
2218 "at line %d\n", pg, pg_num, num);
2219 ret = -EINVAL;
2220 break;
2221 }
2222 num++;
2223 }
2224 out:
2225 if (ret) {
2226 core_alua_free_lba_map(&lba_list);
2227 count = ret;
2228 } else
2229 core_alua_set_lba_map(dev, &lba_list,
2230 segment_size, segment_mult);
2231 kfree(orig);
2232 return count;
2233 }
2234
2235 CONFIGFS_ATTR_RO(target_dev_, info);
2236 CONFIGFS_ATTR_WO(target_dev_, control);
2237 CONFIGFS_ATTR(target_dev_, alias);
2238 CONFIGFS_ATTR(target_dev_, udev_path);
2239 CONFIGFS_ATTR(target_dev_, enable);
2240 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2241 CONFIGFS_ATTR(target_dev_, lba_map);
2242
2243 static struct configfs_attribute *target_core_dev_attrs[] = {
2244 &target_dev_attr_info,
2245 &target_dev_attr_control,
2246 &target_dev_attr_alias,
2247 &target_dev_attr_udev_path,
2248 &target_dev_attr_enable,
2249 &target_dev_attr_alua_lu_gp,
2250 &target_dev_attr_lba_map,
2251 NULL,
2252 };
2253
2254 static void target_core_dev_release(struct config_item *item)
2255 {
2256 struct config_group *dev_cg = to_config_group(item);
2257 struct se_device *dev =
2258 container_of(dev_cg, struct se_device, dev_group);
2259
2260 target_free_device(dev);
2261 }
2262
2263 /*
2264 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2265 * within target_fabric_port_link()
2266 */
2267 struct configfs_item_operations target_core_dev_item_ops = {
2268 .release = target_core_dev_release,
2269 };
2270
2271 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2272
2273 /* End functions for struct config_item_type tb_dev_cit */
2274
2275 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2276
2277 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2278 {
2279 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2280 lu_gp_group);
2281 }
2282
2283 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2284 {
2285 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2286
2287 if (!lu_gp->lu_gp_valid_id)
2288 return 0;
2289 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2290 }
2291
2292 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2293 const char *page, size_t count)
2294 {
2295 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2296 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2297 unsigned long lu_gp_id;
2298 int ret;
2299
2300 ret = kstrtoul(page, 0, &lu_gp_id);
2301 if (ret < 0) {
2302 pr_err("kstrtoul() returned %d for"
2303 " lu_gp_id\n", ret);
2304 return ret;
2305 }
2306 if (lu_gp_id > 0x0000ffff) {
2307 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2308 " 0x0000ffff\n", lu_gp_id);
2309 return -EINVAL;
2310 }
2311
2312 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2313 if (ret < 0)
2314 return -EINVAL;
2315
2316 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2317 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2318 config_item_name(&alua_lu_gp_cg->cg_item),
2319 lu_gp->lu_gp_id);
2320
2321 return count;
2322 }
2323
2324 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2325 {
2326 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2327 struct se_device *dev;
2328 struct se_hba *hba;
2329 struct t10_alua_lu_gp_member *lu_gp_mem;
2330 ssize_t len = 0, cur_len;
2331 unsigned char buf[LU_GROUP_NAME_BUF];
2332
2333 memset(buf, 0, LU_GROUP_NAME_BUF);
2334
2335 spin_lock(&lu_gp->lu_gp_lock);
2336 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2337 dev = lu_gp_mem->lu_gp_mem_dev;
2338 hba = dev->se_hba;
2339
2340 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2341 config_item_name(&hba->hba_group.cg_item),
2342 config_item_name(&dev->dev_group.cg_item));
2343 cur_len++; /* Extra byte for NULL terminator */
2344
2345 if ((cur_len + len) > PAGE_SIZE) {
2346 pr_warn("Ran out of lu_gp_show_attr"
2347 "_members buffer\n");
2348 break;
2349 }
2350 memcpy(page+len, buf, cur_len);
2351 len += cur_len;
2352 }
2353 spin_unlock(&lu_gp->lu_gp_lock);
2354
2355 return len;
2356 }
2357
2358 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2359 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2360
2361 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2362 &target_lu_gp_attr_lu_gp_id,
2363 &target_lu_gp_attr_members,
2364 NULL,
2365 };
2366
2367 static void target_core_alua_lu_gp_release(struct config_item *item)
2368 {
2369 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2370 struct t10_alua_lu_gp, lu_gp_group);
2371
2372 core_alua_free_lu_gp(lu_gp);
2373 }
2374
2375 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2376 .release = target_core_alua_lu_gp_release,
2377 };
2378
2379 static const struct config_item_type target_core_alua_lu_gp_cit = {
2380 .ct_item_ops = &target_core_alua_lu_gp_ops,
2381 .ct_attrs = target_core_alua_lu_gp_attrs,
2382 .ct_owner = THIS_MODULE,
2383 };
2384
2385 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2386
2387 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2388
2389 static struct config_group *target_core_alua_create_lu_gp(
2390 struct config_group *group,
2391 const char *name)
2392 {
2393 struct t10_alua_lu_gp *lu_gp;
2394 struct config_group *alua_lu_gp_cg = NULL;
2395 struct config_item *alua_lu_gp_ci = NULL;
2396
2397 lu_gp = core_alua_allocate_lu_gp(name, 0);
2398 if (IS_ERR(lu_gp))
2399 return NULL;
2400
2401 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2402 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2403
2404 config_group_init_type_name(alua_lu_gp_cg, name,
2405 &target_core_alua_lu_gp_cit);
2406
2407 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2408 " Group: core/alua/lu_gps/%s\n",
2409 config_item_name(alua_lu_gp_ci));
2410
2411 return alua_lu_gp_cg;
2412
2413 }
2414
2415 static void target_core_alua_drop_lu_gp(
2416 struct config_group *group,
2417 struct config_item *item)
2418 {
2419 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2420 struct t10_alua_lu_gp, lu_gp_group);
2421
2422 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2423 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2424 config_item_name(item), lu_gp->lu_gp_id);
2425 /*
2426 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2427 * -> target_core_alua_lu_gp_release()
2428 */
2429 config_item_put(item);
2430 }
2431
2432 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2433 .make_group = &target_core_alua_create_lu_gp,
2434 .drop_item = &target_core_alua_drop_lu_gp,
2435 };
2436
2437 static const struct config_item_type target_core_alua_lu_gps_cit = {
2438 .ct_item_ops = NULL,
2439 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2440 .ct_owner = THIS_MODULE,
2441 };
2442
2443 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2444
2445 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2446
2447 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2448 {
2449 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2450 tg_pt_gp_group);
2451 }
2452
2453 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2454 char *page)
2455 {
2456 return sprintf(page, "%d\n",
2457 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2458 }
2459
2460 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2461 const char *page, size_t count)
2462 {
2463 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2464 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2465 unsigned long tmp;
2466 int new_state, ret;
2467
2468 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2469 pr_err("Unable to do implicit ALUA on non valid"
2470 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2471 return -EINVAL;
2472 }
2473 if (!(dev->dev_flags & DF_CONFIGURED)) {
2474 pr_err("Unable to set alua_access_state while device is"
2475 " not configured\n");
2476 return -ENODEV;
2477 }
2478
2479 ret = kstrtoul(page, 0, &tmp);
2480 if (ret < 0) {
2481 pr_err("Unable to extract new ALUA access state from"
2482 " %s\n", page);
2483 return ret;
2484 }
2485 new_state = (int)tmp;
2486
2487 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2488 pr_err("Unable to process implicit configfs ALUA"
2489 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2490 return -EINVAL;
2491 }
2492 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2493 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2494 /* LBA DEPENDENT is only allowed with implicit ALUA */
2495 pr_err("Unable to process implicit configfs ALUA transition"
2496 " while explicit ALUA management is enabled\n");
2497 return -EINVAL;
2498 }
2499
2500 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2501 NULL, NULL, new_state, 0);
2502 return (!ret) ? count : -EINVAL;
2503 }
2504
2505 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2506 char *page)
2507 {
2508 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2509 return sprintf(page, "%s\n",
2510 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2511 }
2512
2513 static ssize_t target_tg_pt_gp_alua_access_status_store(
2514 struct config_item *item, const char *page, size_t count)
2515 {
2516 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2517 unsigned long tmp;
2518 int new_status, ret;
2519
2520 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2521 pr_err("Unable to do set ALUA access status on non"
2522 " valid tg_pt_gp ID: %hu\n",
2523 tg_pt_gp->tg_pt_gp_valid_id);
2524 return -EINVAL;
2525 }
2526
2527 ret = kstrtoul(page, 0, &tmp);
2528 if (ret < 0) {
2529 pr_err("Unable to extract new ALUA access status"
2530 " from %s\n", page);
2531 return ret;
2532 }
2533 new_status = (int)tmp;
2534
2535 if ((new_status != ALUA_STATUS_NONE) &&
2536 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2537 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2538 pr_err("Illegal ALUA access status: 0x%02x\n",
2539 new_status);
2540 return -EINVAL;
2541 }
2542
2543 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2544 return count;
2545 }
2546
2547 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2548 char *page)
2549 {
2550 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2551 }
2552
2553 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2554 const char *page, size_t count)
2555 {
2556 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2557 }
2558
2559 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2560 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2561 struct config_item *item, char *p) \
2562 { \
2563 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2564 return sprintf(p, "%d\n", \
2565 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2566 } \
2567 \
2568 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2569 struct config_item *item, const char *p, size_t c) \
2570 { \
2571 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2572 unsigned long tmp; \
2573 int ret; \
2574 \
2575 if (!t->tg_pt_gp_valid_id) { \
2576 pr_err("Unable to do set " #_name " ALUA state on non" \
2577 " valid tg_pt_gp ID: %hu\n", \
2578 t->tg_pt_gp_valid_id); \
2579 return -EINVAL; \
2580 } \
2581 \
2582 ret = kstrtoul(p, 0, &tmp); \
2583 if (ret < 0) { \
2584 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2585 return -EINVAL; \
2586 } \
2587 if (tmp > 1) { \
2588 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2589 return -EINVAL; \
2590 } \
2591 if (tmp) \
2592 t->tg_pt_gp_alua_supported_states |= _bit; \
2593 else \
2594 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2595 \
2596 return c; \
2597 }
2598
2599 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2600 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2601 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2602 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2603 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2604 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2605 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2606
2607 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2608 struct config_item *item, char *page)
2609 {
2610 return sprintf(page, "%d\n",
2611 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2612 }
2613
2614 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2615 struct config_item *item, const char *page, size_t count)
2616 {
2617 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2618 unsigned long tmp;
2619 int ret;
2620
2621 ret = kstrtoul(page, 0, &tmp);
2622 if (ret < 0) {
2623 pr_err("Unable to extract alua_write_metadata\n");
2624 return ret;
2625 }
2626
2627 if ((tmp != 0) && (tmp != 1)) {
2628 pr_err("Illegal value for alua_write_metadata:"
2629 " %lu\n", tmp);
2630 return -EINVAL;
2631 }
2632 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2633
2634 return count;
2635 }
2636
2637 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2638 char *page)
2639 {
2640 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2641 }
2642
2643 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2644 const char *page, size_t count)
2645 {
2646 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2647 count);
2648 }
2649
2650 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2651 char *page)
2652 {
2653 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2654 }
2655
2656 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2657 const char *page, size_t count)
2658 {
2659 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2660 count);
2661 }
2662
2663 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2664 struct config_item *item, char *page)
2665 {
2666 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2667 }
2668
2669 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2670 struct config_item *item, const char *page, size_t count)
2671 {
2672 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2673 count);
2674 }
2675
2676 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2677 char *page)
2678 {
2679 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2680 }
2681
2682 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2683 const char *page, size_t count)
2684 {
2685 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2686 }
2687
2688 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2689 char *page)
2690 {
2691 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2692
2693 if (!tg_pt_gp->tg_pt_gp_valid_id)
2694 return 0;
2695 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2696 }
2697
2698 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2699 const char *page, size_t count)
2700 {
2701 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2702 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2703 unsigned long tg_pt_gp_id;
2704 int ret;
2705
2706 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2707 if (ret < 0) {
2708 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2709 page);
2710 return ret;
2711 }
2712 if (tg_pt_gp_id > 0x0000ffff) {
2713 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
2714 tg_pt_gp_id);
2715 return -EINVAL;
2716 }
2717
2718 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2719 if (ret < 0)
2720 return -EINVAL;
2721
2722 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2723 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2724 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2725 tg_pt_gp->tg_pt_gp_id);
2726
2727 return count;
2728 }
2729
2730 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
2731 char *page)
2732 {
2733 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2734 struct se_lun *lun;
2735 ssize_t len = 0, cur_len;
2736 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2737
2738 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2739
2740 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2741 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2742 lun_tg_pt_gp_link) {
2743 struct se_portal_group *tpg = lun->lun_tpg;
2744
2745 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2746 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2747 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2748 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2749 config_item_name(&lun->lun_group.cg_item));
2750 cur_len++; /* Extra byte for NULL terminator */
2751
2752 if ((cur_len + len) > PAGE_SIZE) {
2753 pr_warn("Ran out of lu_gp_show_attr"
2754 "_members buffer\n");
2755 break;
2756 }
2757 memcpy(page+len, buf, cur_len);
2758 len += cur_len;
2759 }
2760 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2761
2762 return len;
2763 }
2764
2765 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
2766 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
2767 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
2768 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
2769 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
2770 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
2771 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
2772 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
2773 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
2774 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
2775 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
2776 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
2777 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
2778 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
2779 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
2780 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
2781 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
2782
2783 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2784 &target_tg_pt_gp_attr_alua_access_state,
2785 &target_tg_pt_gp_attr_alua_access_status,
2786 &target_tg_pt_gp_attr_alua_access_type,
2787 &target_tg_pt_gp_attr_alua_support_transitioning,
2788 &target_tg_pt_gp_attr_alua_support_offline,
2789 &target_tg_pt_gp_attr_alua_support_lba_dependent,
2790 &target_tg_pt_gp_attr_alua_support_unavailable,
2791 &target_tg_pt_gp_attr_alua_support_standby,
2792 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
2793 &target_tg_pt_gp_attr_alua_support_active_optimized,
2794 &target_tg_pt_gp_attr_alua_write_metadata,
2795 &target_tg_pt_gp_attr_nonop_delay_msecs,
2796 &target_tg_pt_gp_attr_trans_delay_msecs,
2797 &target_tg_pt_gp_attr_implicit_trans_secs,
2798 &target_tg_pt_gp_attr_preferred,
2799 &target_tg_pt_gp_attr_tg_pt_gp_id,
2800 &target_tg_pt_gp_attr_members,
2801 NULL,
2802 };
2803
2804 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2805 {
2806 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2807 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2808
2809 core_alua_free_tg_pt_gp(tg_pt_gp);
2810 }
2811
2812 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2813 .release = target_core_alua_tg_pt_gp_release,
2814 };
2815
2816 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
2817 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2818 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2819 .ct_owner = THIS_MODULE,
2820 };
2821
2822 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2823
2824 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2825
2826 static struct config_group *target_core_alua_create_tg_pt_gp(
2827 struct config_group *group,
2828 const char *name)
2829 {
2830 struct t10_alua *alua = container_of(group, struct t10_alua,
2831 alua_tg_pt_gps_group);
2832 struct t10_alua_tg_pt_gp *tg_pt_gp;
2833 struct config_group *alua_tg_pt_gp_cg = NULL;
2834 struct config_item *alua_tg_pt_gp_ci = NULL;
2835
2836 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2837 if (!tg_pt_gp)
2838 return NULL;
2839
2840 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2841 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2842
2843 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2844 &target_core_alua_tg_pt_gp_cit);
2845
2846 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2847 " Group: alua/tg_pt_gps/%s\n",
2848 config_item_name(alua_tg_pt_gp_ci));
2849
2850 return alua_tg_pt_gp_cg;
2851 }
2852
2853 static void target_core_alua_drop_tg_pt_gp(
2854 struct config_group *group,
2855 struct config_item *item)
2856 {
2857 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2858 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2859
2860 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
2861 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
2862 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
2863 /*
2864 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
2865 * -> target_core_alua_tg_pt_gp_release().
2866 */
2867 config_item_put(item);
2868 }
2869
2870 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
2871 .make_group = &target_core_alua_create_tg_pt_gp,
2872 .drop_item = &target_core_alua_drop_tg_pt_gp,
2873 };
2874
2875 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
2876
2877 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2878
2879 /* Start functions for struct config_item_type target_core_alua_cit */
2880
2881 /*
2882 * target_core_alua_cit is a ConfigFS group that lives under
2883 * /sys/kernel/config/target/core/alua. There are default groups
2884 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
2885 * target_core_alua_cit in target_core_init_configfs() below.
2886 */
2887 static const struct config_item_type target_core_alua_cit = {
2888 .ct_item_ops = NULL,
2889 .ct_attrs = NULL,
2890 .ct_owner = THIS_MODULE,
2891 };
2892
2893 /* End functions for struct config_item_type target_core_alua_cit */
2894
2895 /* Start functions for struct config_item_type tb_dev_stat_cit */
2896
2897 static struct config_group *target_core_stat_mkdir(
2898 struct config_group *group,
2899 const char *name)
2900 {
2901 return ERR_PTR(-ENOSYS);
2902 }
2903
2904 static void target_core_stat_rmdir(
2905 struct config_group *group,
2906 struct config_item *item)
2907 {
2908 return;
2909 }
2910
2911 static struct configfs_group_operations target_core_stat_group_ops = {
2912 .make_group = &target_core_stat_mkdir,
2913 .drop_item = &target_core_stat_rmdir,
2914 };
2915
2916 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
2917
2918 /* End functions for struct config_item_type tb_dev_stat_cit */
2919
2920 /* Start functions for struct config_item_type target_core_hba_cit */
2921
2922 static struct config_group *target_core_make_subdev(
2923 struct config_group *group,
2924 const char *name)
2925 {
2926 struct t10_alua_tg_pt_gp *tg_pt_gp;
2927 struct config_item *hba_ci = &group->cg_item;
2928 struct se_hba *hba = item_to_hba(hba_ci);
2929 struct target_backend *tb = hba->backend;
2930 struct se_device *dev;
2931 int errno = -ENOMEM, ret;
2932
2933 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
2934 if (ret)
2935 return ERR_PTR(ret);
2936
2937 dev = target_alloc_device(hba, name);
2938 if (!dev)
2939 goto out_unlock;
2940
2941 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
2942
2943 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
2944 &tb->tb_dev_attrib_cit);
2945 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
2946
2947 config_group_init_type_name(&dev->dev_pr_group, "pr",
2948 &tb->tb_dev_pr_cit);
2949 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
2950
2951 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
2952 &tb->tb_dev_wwn_cit);
2953 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
2954 &dev->dev_group);
2955
2956 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
2957 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
2958 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
2959 &dev->dev_group);
2960
2961 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
2962 "statistics", &tb->tb_dev_stat_cit);
2963 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
2964 &dev->dev_group);
2965
2966 /*
2967 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
2968 */
2969 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
2970 if (!tg_pt_gp)
2971 goto out_free_device;
2972 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
2973
2974 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
2975 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
2976 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
2977 &dev->t10_alua.alua_tg_pt_gps_group);
2978
2979 /*
2980 * Add core/$HBA/$DEV/statistics/ default groups
2981 */
2982 target_stat_setup_dev_default_groups(dev);
2983
2984 mutex_unlock(&hba->hba_access_mutex);
2985 return &dev->dev_group;
2986
2987 out_free_device:
2988 target_free_device(dev);
2989 out_unlock:
2990 mutex_unlock(&hba->hba_access_mutex);
2991 return ERR_PTR(errno);
2992 }
2993
2994 static void target_core_drop_subdev(
2995 struct config_group *group,
2996 struct config_item *item)
2997 {
2998 struct config_group *dev_cg = to_config_group(item);
2999 struct se_device *dev =
3000 container_of(dev_cg, struct se_device, dev_group);
3001 struct se_hba *hba;
3002
3003 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3004
3005 mutex_lock(&hba->hba_access_mutex);
3006
3007 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3008 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3009
3010 /*
3011 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3012 * directly from target_core_alua_tg_pt_gp_release().
3013 */
3014 dev->t10_alua.default_tg_pt_gp = NULL;
3015
3016 configfs_remove_default_groups(dev_cg);
3017
3018 /*
3019 * se_dev is released from target_core_dev_item_ops->release()
3020 */
3021 config_item_put(item);
3022 mutex_unlock(&hba->hba_access_mutex);
3023 }
3024
3025 static struct configfs_group_operations target_core_hba_group_ops = {
3026 .make_group = target_core_make_subdev,
3027 .drop_item = target_core_drop_subdev,
3028 };
3029
3030
3031 static inline struct se_hba *to_hba(struct config_item *item)
3032 {
3033 return container_of(to_config_group(item), struct se_hba, hba_group);
3034 }
3035
3036 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3037 {
3038 struct se_hba *hba = to_hba(item);
3039
3040 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3041 hba->hba_id, hba->backend->ops->name,
3042 TARGET_CORE_VERSION);
3043 }
3044
3045 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3046 {
3047 struct se_hba *hba = to_hba(item);
3048 int hba_mode = 0;
3049
3050 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3051 hba_mode = 1;
3052
3053 return sprintf(page, "%d\n", hba_mode);
3054 }
3055
3056 static ssize_t target_hba_mode_store(struct config_item *item,
3057 const char *page, size_t count)
3058 {
3059 struct se_hba *hba = to_hba(item);
3060 unsigned long mode_flag;
3061 int ret;
3062
3063 if (hba->backend->ops->pmode_enable_hba == NULL)
3064 return -EINVAL;
3065
3066 ret = kstrtoul(page, 0, &mode_flag);
3067 if (ret < 0) {
3068 pr_err("Unable to extract hba mode flag: %d\n", ret);
3069 return ret;
3070 }
3071
3072 if (hba->dev_count) {
3073 pr_err("Unable to set hba_mode with active devices\n");
3074 return -EINVAL;
3075 }
3076
3077 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3078 if (ret < 0)
3079 return -EINVAL;
3080 if (ret > 0)
3081 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3082 else if (ret == 0)
3083 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3084
3085 return count;
3086 }
3087
3088 CONFIGFS_ATTR_RO(target_, hba_info);
3089 CONFIGFS_ATTR(target_, hba_mode);
3090
3091 static void target_core_hba_release(struct config_item *item)
3092 {
3093 struct se_hba *hba = container_of(to_config_group(item),
3094 struct se_hba, hba_group);
3095 core_delete_hba(hba);
3096 }
3097
3098 static struct configfs_attribute *target_core_hba_attrs[] = {
3099 &target_attr_hba_info,
3100 &target_attr_hba_mode,
3101 NULL,
3102 };
3103
3104 static struct configfs_item_operations target_core_hba_item_ops = {
3105 .release = target_core_hba_release,
3106 };
3107
3108 static const struct config_item_type target_core_hba_cit = {
3109 .ct_item_ops = &target_core_hba_item_ops,
3110 .ct_group_ops = &target_core_hba_group_ops,
3111 .ct_attrs = target_core_hba_attrs,
3112 .ct_owner = THIS_MODULE,
3113 };
3114
3115 static struct config_group *target_core_call_addhbatotarget(
3116 struct config_group *group,
3117 const char *name)
3118 {
3119 char *se_plugin_str, *str, *str2;
3120 struct se_hba *hba;
3121 char buf[TARGET_CORE_NAME_MAX_LEN];
3122 unsigned long plugin_dep_id = 0;
3123 int ret;
3124
3125 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3126 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3127 pr_err("Passed *name strlen(): %d exceeds"
3128 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3129 TARGET_CORE_NAME_MAX_LEN);
3130 return ERR_PTR(-ENAMETOOLONG);
3131 }
3132 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3133
3134 str = strstr(buf, "_");
3135 if (!str) {
3136 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3137 return ERR_PTR(-EINVAL);
3138 }
3139 se_plugin_str = buf;
3140 /*
3141 * Special case for subsystem plugins that have "_" in their names.
3142 * Namely rd_direct and rd_mcp..
3143 */
3144 str2 = strstr(str+1, "_");
3145 if (str2) {
3146 *str2 = '\0'; /* Terminate for *se_plugin_str */
3147 str2++; /* Skip to start of plugin dependent ID */
3148 str = str2;
3149 } else {
3150 *str = '\0'; /* Terminate for *se_plugin_str */
3151 str++; /* Skip to start of plugin dependent ID */
3152 }
3153
3154 ret = kstrtoul(str, 0, &plugin_dep_id);
3155 if (ret < 0) {
3156 pr_err("kstrtoul() returned %d for"
3157 " plugin_dep_id\n", ret);
3158 return ERR_PTR(ret);
3159 }
3160 /*
3161 * Load up TCM subsystem plugins if they have not already been loaded.
3162 */
3163 transport_subsystem_check_init();
3164
3165 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3166 if (IS_ERR(hba))
3167 return ERR_CAST(hba);
3168
3169 config_group_init_type_name(&hba->hba_group, name,
3170 &target_core_hba_cit);
3171
3172 return &hba->hba_group;
3173 }
3174
3175 static void target_core_call_delhbafromtarget(
3176 struct config_group *group,
3177 struct config_item *item)
3178 {
3179 /*
3180 * core_delete_hba() is called from target_core_hba_item_ops->release()
3181 * -> target_core_hba_release()
3182 */
3183 config_item_put(item);
3184 }
3185
3186 static struct configfs_group_operations target_core_group_ops = {
3187 .make_group = target_core_call_addhbatotarget,
3188 .drop_item = target_core_call_delhbafromtarget,
3189 };
3190
3191 static const struct config_item_type target_core_cit = {
3192 .ct_item_ops = NULL,
3193 .ct_group_ops = &target_core_group_ops,
3194 .ct_attrs = NULL,
3195 .ct_owner = THIS_MODULE,
3196 };
3197
3198 /* Stop functions for struct config_item_type target_core_hba_cit */
3199
3200 void target_setup_backend_cits(struct target_backend *tb)
3201 {
3202 target_core_setup_dev_cit(tb);
3203 target_core_setup_dev_attrib_cit(tb);
3204 target_core_setup_dev_pr_cit(tb);
3205 target_core_setup_dev_wwn_cit(tb);
3206 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3207 target_core_setup_dev_stat_cit(tb);
3208 }
3209
3210 static int __init target_core_init_configfs(void)
3211 {
3212 struct configfs_subsystem *subsys = &target_core_fabrics;
3213 struct t10_alua_lu_gp *lu_gp;
3214 int ret;
3215
3216 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3217 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3218 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3219
3220 config_group_init(&subsys->su_group);
3221 mutex_init(&subsys->su_mutex);
3222
3223 ret = init_se_kmem_caches();
3224 if (ret < 0)
3225 return ret;
3226 /*
3227 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3228 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3229 */
3230 config_group_init_type_name(&target_core_hbagroup, "core",
3231 &target_core_cit);
3232 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3233
3234 /*
3235 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3236 */
3237 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3238 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3239
3240 /*
3241 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3242 * groups under /sys/kernel/config/target/core/alua/
3243 */
3244 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3245 &target_core_alua_lu_gps_cit);
3246 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3247
3248 /*
3249 * Add core/alua/lu_gps/default_lu_gp
3250 */
3251 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3252 if (IS_ERR(lu_gp)) {
3253 ret = -ENOMEM;
3254 goto out_global;
3255 }
3256
3257 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3258 &target_core_alua_lu_gp_cit);
3259 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3260
3261 default_lu_gp = lu_gp;
3262
3263 /*
3264 * Register the target_core_mod subsystem with configfs.
3265 */
3266 ret = configfs_register_subsystem(subsys);
3267 if (ret < 0) {
3268 pr_err("Error %d while registering subsystem %s\n",
3269 ret, subsys->su_group.cg_item.ci_namebuf);
3270 goto out_global;
3271 }
3272 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3273 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3274 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3275 /*
3276 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3277 */
3278 ret = rd_module_init();
3279 if (ret < 0)
3280 goto out;
3281
3282 ret = core_dev_setup_virtual_lun0();
3283 if (ret < 0)
3284 goto out;
3285
3286 ret = target_xcopy_setup_pt();
3287 if (ret < 0)
3288 goto out;
3289
3290 return 0;
3291
3292 out:
3293 configfs_unregister_subsystem(subsys);
3294 core_dev_release_virtual_lun0();
3295 rd_module_exit();
3296 out_global:
3297 if (default_lu_gp) {
3298 core_alua_free_lu_gp(default_lu_gp);
3299 default_lu_gp = NULL;
3300 }
3301 release_se_kmem_caches();
3302 return ret;
3303 }
3304
3305 static void __exit target_core_exit_configfs(void)
3306 {
3307 configfs_remove_default_groups(&alua_lu_gps_group);
3308 configfs_remove_default_groups(&alua_group);
3309 configfs_remove_default_groups(&target_core_hbagroup);
3310
3311 /*
3312 * We expect subsys->su_group.default_groups to be released
3313 * by configfs subsystem provider logic..
3314 */
3315 configfs_unregister_subsystem(&target_core_fabrics);
3316
3317 core_alua_free_lu_gp(default_lu_gp);
3318 default_lu_gp = NULL;
3319
3320 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3321 " Infrastructure\n");
3322
3323 core_dev_release_virtual_lun0();
3324 rd_module_exit();
3325 target_xcopy_release_pt();
3326 release_se_kmem_caches();
3327 }
3328
3329 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3330 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3331 MODULE_LICENSE("GPL");
3332
3333 module_init(target_core_init_configfs);
3334 module_exit(target_core_exit_configfs);
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