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spi: davinci: Choose correct pre-scaler limit based on SOC
[deliverable/linux.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 #include <target/target_core_fabric_configfs.h>
44 #include <target/configfs_macros.h>
45
46 #include "target_core_internal.h"
47 #include "target_core_alua.h"
48 #include "target_core_pr.h"
49 #include "target_core_rd.h"
50 #include "target_core_xcopy.h"
51
52 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
53 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
54 { \
55 struct config_item_type *cit = &tb->tb_##_name##_cit; \
56 \
57 cit->ct_item_ops = _item_ops; \
58 cit->ct_group_ops = _group_ops; \
59 cit->ct_attrs = _attrs; \
60 cit->ct_owner = tb->ops->owner; \
61 pr_debug("Setup generic %s\n", __stringify(_name)); \
62 }
63
64 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
65 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
66 { \
67 struct config_item_type *cit = &tb->tb_##_name##_cit; \
68 \
69 cit->ct_item_ops = _item_ops; \
70 cit->ct_group_ops = _group_ops; \
71 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
72 cit->ct_owner = tb->ops->owner; \
73 pr_debug("Setup generic %s\n", __stringify(_name)); \
74 }
75
76 extern struct t10_alua_lu_gp *default_lu_gp;
77
78 static LIST_HEAD(g_tf_list);
79 static DEFINE_MUTEX(g_tf_lock);
80
81 struct target_core_configfs_attribute {
82 struct configfs_attribute attr;
83 ssize_t (*show)(void *, char *);
84 ssize_t (*store)(void *, const char *, size_t);
85 };
86
87 static struct config_group target_core_hbagroup;
88 static struct config_group alua_group;
89 static struct config_group alua_lu_gps_group;
90
91 static inline struct se_hba *
92 item_to_hba(struct config_item *item)
93 {
94 return container_of(to_config_group(item), struct se_hba, hba_group);
95 }
96
97 /*
98 * Attributes for /sys/kernel/config/target/
99 */
100 static ssize_t target_core_attr_show(struct config_item *item,
101 struct configfs_attribute *attr,
102 char *page)
103 {
104 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
105 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
106 utsname()->sysname, utsname()->machine);
107 }
108
109 static struct configfs_item_operations target_core_fabric_item_ops = {
110 .show_attribute = target_core_attr_show,
111 };
112
113 static struct configfs_attribute target_core_item_attr_version = {
114 .ca_owner = THIS_MODULE,
115 .ca_name = "version",
116 .ca_mode = S_IRUGO,
117 };
118
119 static struct target_fabric_configfs *target_core_get_fabric(
120 const char *name)
121 {
122 struct target_fabric_configfs *tf;
123
124 if (!name)
125 return NULL;
126
127 mutex_lock(&g_tf_lock);
128 list_for_each_entry(tf, &g_tf_list, tf_list) {
129 if (!strcmp(tf->tf_ops->name, name)) {
130 atomic_inc(&tf->tf_access_cnt);
131 mutex_unlock(&g_tf_lock);
132 return tf;
133 }
134 }
135 mutex_unlock(&g_tf_lock);
136
137 return NULL;
138 }
139
140 /*
141 * Called from struct target_core_group_ops->make_group()
142 */
143 static struct config_group *target_core_register_fabric(
144 struct config_group *group,
145 const char *name)
146 {
147 struct target_fabric_configfs *tf;
148 int ret;
149
150 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
151 " %s\n", group, name);
152
153 tf = target_core_get_fabric(name);
154 if (!tf) {
155 pr_debug("target_core_register_fabric() trying autoload for %s\n",
156 name);
157
158 /*
159 * Below are some hardcoded request_module() calls to automatically
160 * local fabric modules when the following is called:
161 *
162 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
163 *
164 * Note that this does not limit which TCM fabric module can be
165 * registered, but simply provids auto loading logic for modules with
166 * mkdir(2) system calls with known TCM fabric modules.
167 */
168
169 if (!strncmp(name, "iscsi", 5)) {
170 /*
171 * Automatically load the LIO Target fabric module when the
172 * following is called:
173 *
174 * mkdir -p $CONFIGFS/target/iscsi
175 */
176 ret = request_module("iscsi_target_mod");
177 if (ret < 0) {
178 pr_debug("request_module() failed for"
179 " iscsi_target_mod.ko: %d\n", ret);
180 return ERR_PTR(-EINVAL);
181 }
182 } else if (!strncmp(name, "loopback", 8)) {
183 /*
184 * Automatically load the tcm_loop fabric module when the
185 * following is called:
186 *
187 * mkdir -p $CONFIGFS/target/loopback
188 */
189 ret = request_module("tcm_loop");
190 if (ret < 0) {
191 pr_debug("request_module() failed for"
192 " tcm_loop.ko: %d\n", ret);
193 return ERR_PTR(-EINVAL);
194 }
195 }
196
197 tf = target_core_get_fabric(name);
198 }
199
200 if (!tf) {
201 pr_debug("target_core_get_fabric() failed for %s\n",
202 name);
203 return ERR_PTR(-EINVAL);
204 }
205 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
206 " %s\n", tf->tf_ops->name);
207 /*
208 * On a successful target_core_get_fabric() look, the returned
209 * struct target_fabric_configfs *tf will contain a usage reference.
210 */
211 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
212 &tf->tf_wwn_cit);
213
214 tf->tf_group.default_groups = tf->tf_default_groups;
215 tf->tf_group.default_groups[0] = &tf->tf_disc_group;
216 tf->tf_group.default_groups[1] = NULL;
217
218 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
219 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
220 &tf->tf_discovery_cit);
221
222 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric:"
223 " %s\n", tf->tf_group.cg_item.ci_name);
224 return &tf->tf_group;
225 }
226
227 /*
228 * Called from struct target_core_group_ops->drop_item()
229 */
230 static void target_core_deregister_fabric(
231 struct config_group *group,
232 struct config_item *item)
233 {
234 struct target_fabric_configfs *tf = container_of(
235 to_config_group(item), struct target_fabric_configfs, tf_group);
236 struct config_group *tf_group;
237 struct config_item *df_item;
238 int i;
239
240 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
241 " tf list\n", config_item_name(item));
242
243 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
244 " %s\n", tf->tf_ops->name);
245 atomic_dec(&tf->tf_access_cnt);
246
247 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
248 " %s\n", config_item_name(item));
249
250 tf_group = &tf->tf_group;
251 for (i = 0; tf_group->default_groups[i]; i++) {
252 df_item = &tf_group->default_groups[i]->cg_item;
253 tf_group->default_groups[i] = NULL;
254 config_item_put(df_item);
255 }
256 config_item_put(item);
257 }
258
259 static struct configfs_group_operations target_core_fabric_group_ops = {
260 .make_group = &target_core_register_fabric,
261 .drop_item = &target_core_deregister_fabric,
262 };
263
264 /*
265 * All item attributes appearing in /sys/kernel/target/ appear here.
266 */
267 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
268 &target_core_item_attr_version,
269 NULL,
270 };
271
272 /*
273 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
274 */
275 static struct config_item_type target_core_fabrics_item = {
276 .ct_item_ops = &target_core_fabric_item_ops,
277 .ct_group_ops = &target_core_fabric_group_ops,
278 .ct_attrs = target_core_fabric_item_attrs,
279 .ct_owner = THIS_MODULE,
280 };
281
282 static struct configfs_subsystem target_core_fabrics = {
283 .su_group = {
284 .cg_item = {
285 .ci_namebuf = "target",
286 .ci_type = &target_core_fabrics_item,
287 },
288 },
289 };
290
291 int target_depend_item(struct config_item *item)
292 {
293 return configfs_depend_item(&target_core_fabrics, item);
294 }
295 EXPORT_SYMBOL(target_depend_item);
296
297 void target_undepend_item(struct config_item *item)
298 {
299 return configfs_undepend_item(&target_core_fabrics, item);
300 }
301 EXPORT_SYMBOL(target_undepend_item);
302
303 /*##############################################################################
304 // Start functions called by external Target Fabrics Modules
305 //############################################################################*/
306
307 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
308 {
309 if (!tfo->name) {
310 pr_err("Missing tfo->name\n");
311 return -EINVAL;
312 }
313 if (strlen(tfo->name) >= TARGET_FABRIC_NAME_SIZE) {
314 pr_err("Passed name: %s exceeds TARGET_FABRIC"
315 "_NAME_SIZE\n", tfo->name);
316 return -EINVAL;
317 }
318 if (!tfo->get_fabric_name) {
319 pr_err("Missing tfo->get_fabric_name()\n");
320 return -EINVAL;
321 }
322 if (!tfo->tpg_get_wwn) {
323 pr_err("Missing tfo->tpg_get_wwn()\n");
324 return -EINVAL;
325 }
326 if (!tfo->tpg_get_tag) {
327 pr_err("Missing tfo->tpg_get_tag()\n");
328 return -EINVAL;
329 }
330 if (!tfo->tpg_check_demo_mode) {
331 pr_err("Missing tfo->tpg_check_demo_mode()\n");
332 return -EINVAL;
333 }
334 if (!tfo->tpg_check_demo_mode_cache) {
335 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
336 return -EINVAL;
337 }
338 if (!tfo->tpg_check_demo_mode_write_protect) {
339 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
340 return -EINVAL;
341 }
342 if (!tfo->tpg_check_prod_mode_write_protect) {
343 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
344 return -EINVAL;
345 }
346 if (!tfo->tpg_get_inst_index) {
347 pr_err("Missing tfo->tpg_get_inst_index()\n");
348 return -EINVAL;
349 }
350 if (!tfo->release_cmd) {
351 pr_err("Missing tfo->release_cmd()\n");
352 return -EINVAL;
353 }
354 if (!tfo->shutdown_session) {
355 pr_err("Missing tfo->shutdown_session()\n");
356 return -EINVAL;
357 }
358 if (!tfo->close_session) {
359 pr_err("Missing tfo->close_session()\n");
360 return -EINVAL;
361 }
362 if (!tfo->sess_get_index) {
363 pr_err("Missing tfo->sess_get_index()\n");
364 return -EINVAL;
365 }
366 if (!tfo->write_pending) {
367 pr_err("Missing tfo->write_pending()\n");
368 return -EINVAL;
369 }
370 if (!tfo->write_pending_status) {
371 pr_err("Missing tfo->write_pending_status()\n");
372 return -EINVAL;
373 }
374 if (!tfo->set_default_node_attributes) {
375 pr_err("Missing tfo->set_default_node_attributes()\n");
376 return -EINVAL;
377 }
378 if (!tfo->get_cmd_state) {
379 pr_err("Missing tfo->get_cmd_state()\n");
380 return -EINVAL;
381 }
382 if (!tfo->queue_data_in) {
383 pr_err("Missing tfo->queue_data_in()\n");
384 return -EINVAL;
385 }
386 if (!tfo->queue_status) {
387 pr_err("Missing tfo->queue_status()\n");
388 return -EINVAL;
389 }
390 if (!tfo->queue_tm_rsp) {
391 pr_err("Missing tfo->queue_tm_rsp()\n");
392 return -EINVAL;
393 }
394 if (!tfo->aborted_task) {
395 pr_err("Missing tfo->aborted_task()\n");
396 return -EINVAL;
397 }
398 /*
399 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
400 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
401 * target_core_fabric_configfs.c WWN+TPG group context code.
402 */
403 if (!tfo->fabric_make_wwn) {
404 pr_err("Missing tfo->fabric_make_wwn()\n");
405 return -EINVAL;
406 }
407 if (!tfo->fabric_drop_wwn) {
408 pr_err("Missing tfo->fabric_drop_wwn()\n");
409 return -EINVAL;
410 }
411 if (!tfo->fabric_make_tpg) {
412 pr_err("Missing tfo->fabric_make_tpg()\n");
413 return -EINVAL;
414 }
415 if (!tfo->fabric_drop_tpg) {
416 pr_err("Missing tfo->fabric_drop_tpg()\n");
417 return -EINVAL;
418 }
419
420 return 0;
421 }
422
423 int target_register_template(const struct target_core_fabric_ops *fo)
424 {
425 struct target_fabric_configfs *tf;
426 int ret;
427
428 ret = target_fabric_tf_ops_check(fo);
429 if (ret)
430 return ret;
431
432 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
433 if (!tf) {
434 pr_err("%s: could not allocate memory!\n", __func__);
435 return -ENOMEM;
436 }
437
438 INIT_LIST_HEAD(&tf->tf_list);
439 atomic_set(&tf->tf_access_cnt, 0);
440 tf->tf_ops = fo;
441 target_fabric_setup_cits(tf);
442
443 mutex_lock(&g_tf_lock);
444 list_add_tail(&tf->tf_list, &g_tf_list);
445 mutex_unlock(&g_tf_lock);
446
447 return 0;
448 }
449 EXPORT_SYMBOL(target_register_template);
450
451 void target_unregister_template(const struct target_core_fabric_ops *fo)
452 {
453 struct target_fabric_configfs *t;
454
455 mutex_lock(&g_tf_lock);
456 list_for_each_entry(t, &g_tf_list, tf_list) {
457 if (!strcmp(t->tf_ops->name, fo->name)) {
458 BUG_ON(atomic_read(&t->tf_access_cnt));
459 list_del(&t->tf_list);
460 kfree(t);
461 break;
462 }
463 }
464 mutex_unlock(&g_tf_lock);
465 }
466 EXPORT_SYMBOL(target_unregister_template);
467
468 /*##############################################################################
469 // Stop functions called by external Target Fabrics Modules
470 //############################################################################*/
471
472 /* Start functions for struct config_item_type tb_dev_attrib_cit */
473 #define DEF_TB_DEV_ATTRIB_SHOW(_name) \
474 static ssize_t show_##_name(struct se_dev_attrib *da, char *page) \
475 { \
476 return snprintf(page, PAGE_SIZE, "%u\n", da->_name); \
477 }
478
479 DEF_TB_DEV_ATTRIB_SHOW(emulate_model_alias);
480 DEF_TB_DEV_ATTRIB_SHOW(emulate_dpo);
481 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_write);
482 DEF_TB_DEV_ATTRIB_SHOW(emulate_fua_read);
483 DEF_TB_DEV_ATTRIB_SHOW(emulate_write_cache);
484 DEF_TB_DEV_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
485 DEF_TB_DEV_ATTRIB_SHOW(emulate_tas);
486 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpu);
487 DEF_TB_DEV_ATTRIB_SHOW(emulate_tpws);
488 DEF_TB_DEV_ATTRIB_SHOW(emulate_caw);
489 DEF_TB_DEV_ATTRIB_SHOW(emulate_3pc);
490 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_type);
491 DEF_TB_DEV_ATTRIB_SHOW(hw_pi_prot_type);
492 DEF_TB_DEV_ATTRIB_SHOW(pi_prot_format);
493 DEF_TB_DEV_ATTRIB_SHOW(enforce_pr_isids);
494 DEF_TB_DEV_ATTRIB_SHOW(is_nonrot);
495 DEF_TB_DEV_ATTRIB_SHOW(emulate_rest_reord);
496 DEF_TB_DEV_ATTRIB_SHOW(force_pr_aptpl);
497 DEF_TB_DEV_ATTRIB_SHOW(hw_block_size);
498 DEF_TB_DEV_ATTRIB_SHOW(block_size);
499 DEF_TB_DEV_ATTRIB_SHOW(hw_max_sectors);
500 DEF_TB_DEV_ATTRIB_SHOW(optimal_sectors);
501 DEF_TB_DEV_ATTRIB_SHOW(hw_queue_depth);
502 DEF_TB_DEV_ATTRIB_SHOW(queue_depth);
503 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_lba_count);
504 DEF_TB_DEV_ATTRIB_SHOW(max_unmap_block_desc_count);
505 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity);
506 DEF_TB_DEV_ATTRIB_SHOW(unmap_granularity_alignment);
507 DEF_TB_DEV_ATTRIB_SHOW(max_write_same_len);
508
509 #define DEF_TB_DEV_ATTRIB_STORE_U32(_name) \
510 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
511 size_t count) \
512 { \
513 u32 val; \
514 int ret; \
515 \
516 ret = kstrtou32(page, 0, &val); \
517 if (ret < 0) \
518 return ret; \
519 da->_name = val; \
520 return count; \
521 }
522
523 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_lba_count);
524 DEF_TB_DEV_ATTRIB_STORE_U32(max_unmap_block_desc_count);
525 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity);
526 DEF_TB_DEV_ATTRIB_STORE_U32(unmap_granularity_alignment);
527 DEF_TB_DEV_ATTRIB_STORE_U32(max_write_same_len);
528
529 #define DEF_TB_DEV_ATTRIB_STORE_BOOL(_name) \
530 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
531 size_t count) \
532 { \
533 bool flag; \
534 int ret; \
535 \
536 ret = strtobool(page, &flag); \
537 if (ret < 0) \
538 return ret; \
539 da->_name = flag; \
540 return count; \
541 }
542
543 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_fua_write);
544 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_caw);
545 DEF_TB_DEV_ATTRIB_STORE_BOOL(emulate_3pc);
546 DEF_TB_DEV_ATTRIB_STORE_BOOL(enforce_pr_isids);
547 DEF_TB_DEV_ATTRIB_STORE_BOOL(is_nonrot);
548
549 #define DEF_TB_DEV_ATTRIB_STORE_STUB(_name) \
550 static ssize_t store_##_name(struct se_dev_attrib *da, const char *page,\
551 size_t count) \
552 { \
553 printk_once(KERN_WARNING \
554 "ignoring deprecated ##_name## attribute\n"); \
555 return count; \
556 }
557
558 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_dpo);
559 DEF_TB_DEV_ATTRIB_STORE_STUB(emulate_fua_read);
560
561 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
562 {
563 const char *configname;
564
565 configname = config_item_name(&dev->dev_group.cg_item);
566 if (strlen(configname) >= 16) {
567 pr_warn("dev[%p]: Backstore name '%s' is too long for "
568 "INQUIRY_MODEL, truncating to 16 bytes\n", dev,
569 configname);
570 }
571 snprintf(&dev->t10_wwn.model[0], 16, "%s", configname);
572 }
573
574 static ssize_t store_emulate_model_alias(struct se_dev_attrib *da,
575 const char *page, size_t count)
576 {
577 struct se_device *dev = da->da_dev;
578 bool flag;
579 int ret;
580
581 if (dev->export_count) {
582 pr_err("dev[%p]: Unable to change model alias"
583 " while export_count is %d\n",
584 dev, dev->export_count);
585 return -EINVAL;
586 }
587
588 ret = strtobool(page, &flag);
589 if (ret < 0)
590 return ret;
591
592 if (flag) {
593 dev_set_t10_wwn_model_alias(dev);
594 } else {
595 strncpy(&dev->t10_wwn.model[0],
596 dev->transport->inquiry_prod, 16);
597 }
598 da->emulate_model_alias = flag;
599 return count;
600 }
601
602 static ssize_t store_emulate_write_cache(struct se_dev_attrib *da,
603 const char *page, size_t count)
604 {
605 bool flag;
606 int ret;
607
608 ret = strtobool(page, &flag);
609 if (ret < 0)
610 return ret;
611
612 if (flag && da->da_dev->transport->get_write_cache) {
613 pr_err("emulate_write_cache not supported for this device\n");
614 return -EINVAL;
615 }
616
617 da->emulate_write_cache = flag;
618 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
619 da->da_dev, flag);
620 return count;
621 }
622
623 static ssize_t store_emulate_ua_intlck_ctrl(struct se_dev_attrib *da,
624 const char *page, size_t count)
625 {
626 u32 val;
627 int ret;
628
629 ret = kstrtou32(page, 0, &val);
630 if (ret < 0)
631 return ret;
632
633 if (val != 0 && val != 1 && val != 2) {
634 pr_err("Illegal value %d\n", val);
635 return -EINVAL;
636 }
637
638 if (da->da_dev->export_count) {
639 pr_err("dev[%p]: Unable to change SE Device"
640 " UA_INTRLCK_CTRL while export_count is %d\n",
641 da->da_dev, da->da_dev->export_count);
642 return -EINVAL;
643 }
644 da->emulate_ua_intlck_ctrl = val;
645 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
646 da->da_dev, val);
647 return count;
648 }
649
650 static ssize_t store_emulate_tas(struct se_dev_attrib *da,
651 const char *page, size_t count)
652 {
653 bool flag;
654 int ret;
655
656 ret = strtobool(page, &flag);
657 if (ret < 0)
658 return ret;
659
660 if (da->da_dev->export_count) {
661 pr_err("dev[%p]: Unable to change SE Device TAS while"
662 " export_count is %d\n",
663 da->da_dev, da->da_dev->export_count);
664 return -EINVAL;
665 }
666 da->emulate_tas = flag;
667 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
668 da->da_dev, flag ? "Enabled" : "Disabled");
669
670 return count;
671 }
672
673 static ssize_t store_emulate_tpu(struct se_dev_attrib *da,
674 const char *page, size_t count)
675 {
676 bool flag;
677 int ret;
678
679 ret = strtobool(page, &flag);
680 if (ret < 0)
681 return ret;
682
683 /*
684 * We expect this value to be non-zero when generic Block Layer
685 * Discard supported is detected iblock_create_virtdevice().
686 */
687 if (flag && !da->max_unmap_block_desc_count) {
688 pr_err("Generic Block Discard not supported\n");
689 return -ENOSYS;
690 }
691
692 da->emulate_tpu = flag;
693 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
694 da->da_dev, flag);
695 return count;
696 }
697
698 static ssize_t store_emulate_tpws(struct se_dev_attrib *da,
699 const char *page, size_t count)
700 {
701 bool flag;
702 int ret;
703
704 ret = strtobool(page, &flag);
705 if (ret < 0)
706 return ret;
707
708 /*
709 * We expect this value to be non-zero when generic Block Layer
710 * Discard supported is detected iblock_create_virtdevice().
711 */
712 if (flag && !da->max_unmap_block_desc_count) {
713 pr_err("Generic Block Discard not supported\n");
714 return -ENOSYS;
715 }
716
717 da->emulate_tpws = flag;
718 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
719 da->da_dev, flag);
720 return count;
721 }
722
723 static ssize_t store_pi_prot_type(struct se_dev_attrib *da,
724 const char *page, size_t count)
725 {
726 int old_prot = da->pi_prot_type, ret;
727 struct se_device *dev = da->da_dev;
728 u32 flag;
729
730 ret = kstrtou32(page, 0, &flag);
731 if (ret < 0)
732 return ret;
733
734 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
735 pr_err("Illegal value %d for pi_prot_type\n", flag);
736 return -EINVAL;
737 }
738 if (flag == 2) {
739 pr_err("DIF TYPE2 protection currently not supported\n");
740 return -ENOSYS;
741 }
742 if (da->hw_pi_prot_type) {
743 pr_warn("DIF protection enabled on underlying hardware,"
744 " ignoring\n");
745 return count;
746 }
747 if (!dev->transport->init_prot || !dev->transport->free_prot) {
748 /* 0 is only allowed value for non-supporting backends */
749 if (flag == 0)
750 return 0;
751
752 pr_err("DIF protection not supported by backend: %s\n",
753 dev->transport->name);
754 return -ENOSYS;
755 }
756 if (!(dev->dev_flags & DF_CONFIGURED)) {
757 pr_err("DIF protection requires device to be configured\n");
758 return -ENODEV;
759 }
760 if (dev->export_count) {
761 pr_err("dev[%p]: Unable to change SE Device PROT type while"
762 " export_count is %d\n", dev, dev->export_count);
763 return -EINVAL;
764 }
765
766 da->pi_prot_type = flag;
767
768 if (flag && !old_prot) {
769 ret = dev->transport->init_prot(dev);
770 if (ret) {
771 da->pi_prot_type = old_prot;
772 return ret;
773 }
774
775 } else if (!flag && old_prot) {
776 dev->transport->free_prot(dev);
777 }
778
779 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
780 return count;
781 }
782
783 static ssize_t store_pi_prot_format(struct se_dev_attrib *da,
784 const char *page, size_t count)
785 {
786 struct se_device *dev = da->da_dev;
787 bool flag;
788 int ret;
789
790 ret = strtobool(page, &flag);
791 if (ret < 0)
792 return ret;
793
794 if (!flag)
795 return count;
796
797 if (!dev->transport->format_prot) {
798 pr_err("DIF protection format not supported by backend %s\n",
799 dev->transport->name);
800 return -ENOSYS;
801 }
802 if (!(dev->dev_flags & DF_CONFIGURED)) {
803 pr_err("DIF protection format requires device to be configured\n");
804 return -ENODEV;
805 }
806 if (dev->export_count) {
807 pr_err("dev[%p]: Unable to format SE Device PROT type while"
808 " export_count is %d\n", dev, dev->export_count);
809 return -EINVAL;
810 }
811
812 ret = dev->transport->format_prot(dev);
813 if (ret)
814 return ret;
815
816 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
817 return count;
818 }
819
820 static ssize_t store_force_pr_aptpl(struct se_dev_attrib *da,
821 const char *page, size_t count)
822 {
823 bool flag;
824 int ret;
825
826 ret = strtobool(page, &flag);
827 if (ret < 0)
828 return ret;
829 if (da->da_dev->export_count) {
830 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
831 " export_count is %d\n",
832 da->da_dev, da->da_dev->export_count);
833 return -EINVAL;
834 }
835
836 da->force_pr_aptpl = flag;
837 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
838 return count;
839 }
840
841 static ssize_t store_emulate_rest_reord(struct se_dev_attrib *da,
842 const char *page, size_t count)
843 {
844 bool flag;
845 int ret;
846
847 ret = strtobool(page, &flag);
848 if (ret < 0)
849 return ret;
850
851 if (flag != 0) {
852 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
853 " reordering not implemented\n", da->da_dev);
854 return -ENOSYS;
855 }
856 da->emulate_rest_reord = flag;
857 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
858 da->da_dev, flag);
859 return count;
860 }
861
862 /*
863 * Note, this can only be called on unexported SE Device Object.
864 */
865 static ssize_t store_queue_depth(struct se_dev_attrib *da,
866 const char *page, size_t count)
867 {
868 struct se_device *dev = da->da_dev;
869 u32 val;
870 int ret;
871
872 ret = kstrtou32(page, 0, &val);
873 if (ret < 0)
874 return ret;
875
876 if (dev->export_count) {
877 pr_err("dev[%p]: Unable to change SE Device TCQ while"
878 " export_count is %d\n",
879 dev, dev->export_count);
880 return -EINVAL;
881 }
882 if (!val) {
883 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
884 return -EINVAL;
885 }
886
887 if (val > dev->dev_attrib.queue_depth) {
888 if (val > dev->dev_attrib.hw_queue_depth) {
889 pr_err("dev[%p]: Passed queue_depth:"
890 " %u exceeds TCM/SE_Device MAX"
891 " TCQ: %u\n", dev, val,
892 dev->dev_attrib.hw_queue_depth);
893 return -EINVAL;
894 }
895 }
896 da->queue_depth = dev->queue_depth = val;
897 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
898 return count;
899 }
900
901 static ssize_t store_optimal_sectors(struct se_dev_attrib *da,
902 const char *page, size_t count)
903 {
904 u32 val;
905 int ret;
906
907 ret = kstrtou32(page, 0, &val);
908 if (ret < 0)
909 return ret;
910
911 if (da->da_dev->export_count) {
912 pr_err("dev[%p]: Unable to change SE Device"
913 " optimal_sectors while export_count is %d\n",
914 da->da_dev, da->da_dev->export_count);
915 return -EINVAL;
916 }
917 if (val > da->hw_max_sectors) {
918 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
919 " greater than hw_max_sectors: %u\n",
920 da->da_dev, val, da->hw_max_sectors);
921 return -EINVAL;
922 }
923
924 da->optimal_sectors = val;
925 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
926 da->da_dev, val);
927 return count;
928 }
929
930 static ssize_t store_block_size(struct se_dev_attrib *da,
931 const char *page, size_t count)
932 {
933 u32 val;
934 int ret;
935
936 ret = kstrtou32(page, 0, &val);
937 if (ret < 0)
938 return ret;
939
940 if (da->da_dev->export_count) {
941 pr_err("dev[%p]: Unable to change SE Device block_size"
942 " while export_count is %d\n",
943 da->da_dev, da->da_dev->export_count);
944 return -EINVAL;
945 }
946
947 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
948 pr_err("dev[%p]: Illegal value for block_device: %u"
949 " for SE device, must be 512, 1024, 2048 or 4096\n",
950 da->da_dev, val);
951 return -EINVAL;
952 }
953
954 da->block_size = val;
955 if (da->max_bytes_per_io)
956 da->hw_max_sectors = da->max_bytes_per_io / val;
957
958 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
959 da->da_dev, val);
960 return count;
961 }
962
963 CONFIGFS_EATTR_STRUCT(target_backend_dev_attrib, se_dev_attrib);
964 #define TB_DEV_ATTR(_backend, _name, _mode) \
965 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
966 __CONFIGFS_EATTR(_name, _mode, \
967 show_##_name, \
968 store_##_name);
969
970 #define TB_DEV_ATTR_RO(_backend, _name) \
971 static struct target_backend_dev_attrib_attribute _backend##_dev_attrib_##_name = \
972 __CONFIGFS_EATTR_RO(_name, \
973 show_##_name);
974
975 TB_DEV_ATTR(target_core, emulate_model_alias, S_IRUGO | S_IWUSR);
976 TB_DEV_ATTR(target_core, emulate_dpo, S_IRUGO | S_IWUSR);
977 TB_DEV_ATTR(target_core, emulate_fua_write, S_IRUGO | S_IWUSR);
978 TB_DEV_ATTR(target_core, emulate_fua_read, S_IRUGO | S_IWUSR);
979 TB_DEV_ATTR(target_core, emulate_write_cache, S_IRUGO | S_IWUSR);
980 TB_DEV_ATTR(target_core, emulate_ua_intlck_ctrl, S_IRUGO | S_IWUSR);
981 TB_DEV_ATTR(target_core, emulate_tas, S_IRUGO | S_IWUSR);
982 TB_DEV_ATTR(target_core, emulate_tpu, S_IRUGO | S_IWUSR);
983 TB_DEV_ATTR(target_core, emulate_tpws, S_IRUGO | S_IWUSR);
984 TB_DEV_ATTR(target_core, emulate_caw, S_IRUGO | S_IWUSR);
985 TB_DEV_ATTR(target_core, emulate_3pc, S_IRUGO | S_IWUSR);
986 TB_DEV_ATTR(target_core, pi_prot_type, S_IRUGO | S_IWUSR);
987 TB_DEV_ATTR_RO(target_core, hw_pi_prot_type);
988 TB_DEV_ATTR(target_core, pi_prot_format, S_IRUGO | S_IWUSR);
989 TB_DEV_ATTR(target_core, enforce_pr_isids, S_IRUGO | S_IWUSR);
990 TB_DEV_ATTR(target_core, is_nonrot, S_IRUGO | S_IWUSR);
991 TB_DEV_ATTR(target_core, emulate_rest_reord, S_IRUGO | S_IWUSR);
992 TB_DEV_ATTR(target_core, force_pr_aptpl, S_IRUGO | S_IWUSR)
993 TB_DEV_ATTR_RO(target_core, hw_block_size);
994 TB_DEV_ATTR(target_core, block_size, S_IRUGO | S_IWUSR)
995 TB_DEV_ATTR_RO(target_core, hw_max_sectors);
996 TB_DEV_ATTR(target_core, optimal_sectors, S_IRUGO | S_IWUSR);
997 TB_DEV_ATTR_RO(target_core, hw_queue_depth);
998 TB_DEV_ATTR(target_core, queue_depth, S_IRUGO | S_IWUSR);
999 TB_DEV_ATTR(target_core, max_unmap_lba_count, S_IRUGO | S_IWUSR);
1000 TB_DEV_ATTR(target_core, max_unmap_block_desc_count, S_IRUGO | S_IWUSR);
1001 TB_DEV_ATTR(target_core, unmap_granularity, S_IRUGO | S_IWUSR);
1002 TB_DEV_ATTR(target_core, unmap_granularity_alignment, S_IRUGO | S_IWUSR);
1003 TB_DEV_ATTR(target_core, max_write_same_len, S_IRUGO | S_IWUSR);
1004
1005 CONFIGFS_EATTR_STRUCT(target_core_dev_attrib, se_dev_attrib);
1006 CONFIGFS_EATTR_OPS(target_core_dev_attrib, se_dev_attrib, da_group);
1007
1008 /*
1009 * dev_attrib attributes for devices using the target core SBC/SPC
1010 * interpreter. Any backend using spc_parse_cdb should be using
1011 * these.
1012 */
1013 struct configfs_attribute *sbc_attrib_attrs[] = {
1014 &target_core_dev_attrib_emulate_model_alias.attr,
1015 &target_core_dev_attrib_emulate_dpo.attr,
1016 &target_core_dev_attrib_emulate_fua_write.attr,
1017 &target_core_dev_attrib_emulate_fua_read.attr,
1018 &target_core_dev_attrib_emulate_write_cache.attr,
1019 &target_core_dev_attrib_emulate_ua_intlck_ctrl.attr,
1020 &target_core_dev_attrib_emulate_tas.attr,
1021 &target_core_dev_attrib_emulate_tpu.attr,
1022 &target_core_dev_attrib_emulate_tpws.attr,
1023 &target_core_dev_attrib_emulate_caw.attr,
1024 &target_core_dev_attrib_emulate_3pc.attr,
1025 &target_core_dev_attrib_pi_prot_type.attr,
1026 &target_core_dev_attrib_hw_pi_prot_type.attr,
1027 &target_core_dev_attrib_pi_prot_format.attr,
1028 &target_core_dev_attrib_enforce_pr_isids.attr,
1029 &target_core_dev_attrib_is_nonrot.attr,
1030 &target_core_dev_attrib_emulate_rest_reord.attr,
1031 &target_core_dev_attrib_force_pr_aptpl.attr,
1032 &target_core_dev_attrib_hw_block_size.attr,
1033 &target_core_dev_attrib_block_size.attr,
1034 &target_core_dev_attrib_hw_max_sectors.attr,
1035 &target_core_dev_attrib_optimal_sectors.attr,
1036 &target_core_dev_attrib_hw_queue_depth.attr,
1037 &target_core_dev_attrib_queue_depth.attr,
1038 &target_core_dev_attrib_max_unmap_lba_count.attr,
1039 &target_core_dev_attrib_max_unmap_block_desc_count.attr,
1040 &target_core_dev_attrib_unmap_granularity.attr,
1041 &target_core_dev_attrib_unmap_granularity_alignment.attr,
1042 &target_core_dev_attrib_max_write_same_len.attr,
1043 NULL,
1044 };
1045 EXPORT_SYMBOL(sbc_attrib_attrs);
1046
1047 TB_DEV_ATTR_RO(target_pt, hw_pi_prot_type);
1048 TB_DEV_ATTR_RO(target_pt, hw_block_size);
1049 TB_DEV_ATTR_RO(target_pt, hw_max_sectors);
1050 TB_DEV_ATTR_RO(target_pt, hw_queue_depth);
1051
1052 /*
1053 * Minimal dev_attrib attributes for devices passing through CDBs.
1054 * In this case we only provide a few read-only attributes for
1055 * backwards compatibility.
1056 */
1057 struct configfs_attribute *passthrough_attrib_attrs[] = {
1058 &target_pt_dev_attrib_hw_pi_prot_type.attr,
1059 &target_pt_dev_attrib_hw_block_size.attr,
1060 &target_pt_dev_attrib_hw_max_sectors.attr,
1061 &target_pt_dev_attrib_hw_queue_depth.attr,
1062 NULL,
1063 };
1064 EXPORT_SYMBOL(passthrough_attrib_attrs);
1065
1066 static struct configfs_item_operations target_core_dev_attrib_ops = {
1067 .show_attribute = target_core_dev_attrib_attr_show,
1068 .store_attribute = target_core_dev_attrib_attr_store,
1069 };
1070
1071 TB_CIT_SETUP_DRV(dev_attrib, &target_core_dev_attrib_ops, NULL);
1072
1073 /* End functions for struct config_item_type tb_dev_attrib_cit */
1074
1075 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1076
1077 CONFIGFS_EATTR_STRUCT(target_core_dev_wwn, t10_wwn);
1078 #define SE_DEV_WWN_ATTR(_name, _mode) \
1079 static struct target_core_dev_wwn_attribute target_core_dev_wwn_##_name = \
1080 __CONFIGFS_EATTR(_name, _mode, \
1081 target_core_dev_wwn_show_attr_##_name, \
1082 target_core_dev_wwn_store_attr_##_name);
1083
1084 #define SE_DEV_WWN_ATTR_RO(_name); \
1085 do { \
1086 static struct target_core_dev_wwn_attribute \
1087 target_core_dev_wwn_##_name = \
1088 __CONFIGFS_EATTR_RO(_name, \
1089 target_core_dev_wwn_show_attr_##_name); \
1090 } while (0);
1091
1092 /*
1093 * VPD page 0x80 Unit serial
1094 */
1095 static ssize_t target_core_dev_wwn_show_attr_vpd_unit_serial(
1096 struct t10_wwn *t10_wwn,
1097 char *page)
1098 {
1099 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1100 &t10_wwn->unit_serial[0]);
1101 }
1102
1103 static ssize_t target_core_dev_wwn_store_attr_vpd_unit_serial(
1104 struct t10_wwn *t10_wwn,
1105 const char *page,
1106 size_t count)
1107 {
1108 struct se_device *dev = t10_wwn->t10_dev;
1109 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1110
1111 /*
1112 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1113 * from the struct scsi_device level firmware, do not allow
1114 * VPD Unit Serial to be emulated.
1115 *
1116 * Note this struct scsi_device could also be emulating VPD
1117 * information from its drivers/scsi LLD. But for now we assume
1118 * it is doing 'the right thing' wrt a world wide unique
1119 * VPD Unit Serial Number that OS dependent multipath can depend on.
1120 */
1121 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1122 pr_err("Underlying SCSI device firmware provided VPD"
1123 " Unit Serial, ignoring request\n");
1124 return -EOPNOTSUPP;
1125 }
1126
1127 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1128 pr_err("Emulated VPD Unit Serial exceeds"
1129 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1130 return -EOVERFLOW;
1131 }
1132 /*
1133 * Check to see if any active $FABRIC_MOD exports exist. If they
1134 * do exist, fail here as changing this information on the fly
1135 * (underneath the initiator side OS dependent multipath code)
1136 * could cause negative effects.
1137 */
1138 if (dev->export_count) {
1139 pr_err("Unable to set VPD Unit Serial while"
1140 " active %d $FABRIC_MOD exports exist\n",
1141 dev->export_count);
1142 return -EINVAL;
1143 }
1144
1145 /*
1146 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1147 *
1148 * Also, strip any newline added from the userspace
1149 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1150 */
1151 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1152 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1153 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1154 "%s", strstrip(buf));
1155 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1156
1157 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1158 " %s\n", dev->t10_wwn.unit_serial);
1159
1160 return count;
1161 }
1162
1163 SE_DEV_WWN_ATTR(vpd_unit_serial, S_IRUGO | S_IWUSR);
1164
1165 /*
1166 * VPD page 0x83 Protocol Identifier
1167 */
1168 static ssize_t target_core_dev_wwn_show_attr_vpd_protocol_identifier(
1169 struct t10_wwn *t10_wwn,
1170 char *page)
1171 {
1172 struct t10_vpd *vpd;
1173 unsigned char buf[VPD_TMP_BUF_SIZE];
1174 ssize_t len = 0;
1175
1176 memset(buf, 0, VPD_TMP_BUF_SIZE);
1177
1178 spin_lock(&t10_wwn->t10_vpd_lock);
1179 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1180 if (!vpd->protocol_identifier_set)
1181 continue;
1182
1183 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1184
1185 if (len + strlen(buf) >= PAGE_SIZE)
1186 break;
1187
1188 len += sprintf(page+len, "%s", buf);
1189 }
1190 spin_unlock(&t10_wwn->t10_vpd_lock);
1191
1192 return len;
1193 }
1194
1195 static ssize_t target_core_dev_wwn_store_attr_vpd_protocol_identifier(
1196 struct t10_wwn *t10_wwn,
1197 const char *page,
1198 size_t count)
1199 {
1200 return -ENOSYS;
1201 }
1202
1203 SE_DEV_WWN_ATTR(vpd_protocol_identifier, S_IRUGO | S_IWUSR);
1204
1205 /*
1206 * Generic wrapper for dumping VPD identifiers by association.
1207 */
1208 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1209 static ssize_t target_core_dev_wwn_show_attr_##_name( \
1210 struct t10_wwn *t10_wwn, \
1211 char *page) \
1212 { \
1213 struct t10_vpd *vpd; \
1214 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1215 ssize_t len = 0; \
1216 \
1217 spin_lock(&t10_wwn->t10_vpd_lock); \
1218 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1219 if (vpd->association != _assoc) \
1220 continue; \
1221 \
1222 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1223 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1224 if (len + strlen(buf) >= PAGE_SIZE) \
1225 break; \
1226 len += sprintf(page+len, "%s", buf); \
1227 \
1228 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1229 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1230 if (len + strlen(buf) >= PAGE_SIZE) \
1231 break; \
1232 len += sprintf(page+len, "%s", buf); \
1233 \
1234 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1235 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1236 if (len + strlen(buf) >= PAGE_SIZE) \
1237 break; \
1238 len += sprintf(page+len, "%s", buf); \
1239 } \
1240 spin_unlock(&t10_wwn->t10_vpd_lock); \
1241 \
1242 return len; \
1243 }
1244
1245 /*
1246 * VPD page 0x83 Association: Logical Unit
1247 */
1248 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1249
1250 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_logical_unit(
1251 struct t10_wwn *t10_wwn,
1252 const char *page,
1253 size_t count)
1254 {
1255 return -ENOSYS;
1256 }
1257
1258 SE_DEV_WWN_ATTR(vpd_assoc_logical_unit, S_IRUGO | S_IWUSR);
1259
1260 /*
1261 * VPD page 0x83 Association: Target Port
1262 */
1263 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1264
1265 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_target_port(
1266 struct t10_wwn *t10_wwn,
1267 const char *page,
1268 size_t count)
1269 {
1270 return -ENOSYS;
1271 }
1272
1273 SE_DEV_WWN_ATTR(vpd_assoc_target_port, S_IRUGO | S_IWUSR);
1274
1275 /*
1276 * VPD page 0x83 Association: SCSI Target Device
1277 */
1278 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1279
1280 static ssize_t target_core_dev_wwn_store_attr_vpd_assoc_scsi_target_device(
1281 struct t10_wwn *t10_wwn,
1282 const char *page,
1283 size_t count)
1284 {
1285 return -ENOSYS;
1286 }
1287
1288 SE_DEV_WWN_ATTR(vpd_assoc_scsi_target_device, S_IRUGO | S_IWUSR);
1289
1290 CONFIGFS_EATTR_OPS(target_core_dev_wwn, t10_wwn, t10_wwn_group);
1291
1292 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1293 &target_core_dev_wwn_vpd_unit_serial.attr,
1294 &target_core_dev_wwn_vpd_protocol_identifier.attr,
1295 &target_core_dev_wwn_vpd_assoc_logical_unit.attr,
1296 &target_core_dev_wwn_vpd_assoc_target_port.attr,
1297 &target_core_dev_wwn_vpd_assoc_scsi_target_device.attr,
1298 NULL,
1299 };
1300
1301 static struct configfs_item_operations target_core_dev_wwn_ops = {
1302 .show_attribute = target_core_dev_wwn_attr_show,
1303 .store_attribute = target_core_dev_wwn_attr_store,
1304 };
1305
1306 TB_CIT_SETUP(dev_wwn, &target_core_dev_wwn_ops, NULL, target_core_dev_wwn_attrs);
1307
1308 /* End functions for struct config_item_type tb_dev_wwn_cit */
1309
1310 /* Start functions for struct config_item_type tb_dev_pr_cit */
1311
1312 CONFIGFS_EATTR_STRUCT(target_core_dev_pr, se_device);
1313 #define SE_DEV_PR_ATTR(_name, _mode) \
1314 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1315 __CONFIGFS_EATTR(_name, _mode, \
1316 target_core_dev_pr_show_attr_##_name, \
1317 target_core_dev_pr_store_attr_##_name);
1318
1319 #define SE_DEV_PR_ATTR_RO(_name); \
1320 static struct target_core_dev_pr_attribute target_core_dev_pr_##_name = \
1321 __CONFIGFS_EATTR_RO(_name, \
1322 target_core_dev_pr_show_attr_##_name);
1323
1324 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1325 char *page)
1326 {
1327 struct se_node_acl *se_nacl;
1328 struct t10_pr_registration *pr_reg;
1329 char i_buf[PR_REG_ISID_ID_LEN];
1330
1331 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1332
1333 pr_reg = dev->dev_pr_res_holder;
1334 if (!pr_reg)
1335 return sprintf(page, "No SPC-3 Reservation holder\n");
1336
1337 se_nacl = pr_reg->pr_reg_nacl;
1338 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1339
1340 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1341 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1342 se_nacl->initiatorname, i_buf);
1343 }
1344
1345 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1346 char *page)
1347 {
1348 struct se_node_acl *se_nacl;
1349 ssize_t len;
1350
1351 se_nacl = dev->dev_reserved_node_acl;
1352 if (se_nacl) {
1353 len = sprintf(page,
1354 "SPC-2 Reservation: %s Initiator: %s\n",
1355 se_nacl->se_tpg->se_tpg_tfo->get_fabric_name(),
1356 se_nacl->initiatorname);
1357 } else {
1358 len = sprintf(page, "No SPC-2 Reservation holder\n");
1359 }
1360 return len;
1361 }
1362
1363 static ssize_t target_core_dev_pr_show_attr_res_holder(struct se_device *dev,
1364 char *page)
1365 {
1366 int ret;
1367
1368 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1369 return sprintf(page, "Passthrough\n");
1370
1371 spin_lock(&dev->dev_reservation_lock);
1372 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1373 ret = target_core_dev_pr_show_spc2_res(dev, page);
1374 else
1375 ret = target_core_dev_pr_show_spc3_res(dev, page);
1376 spin_unlock(&dev->dev_reservation_lock);
1377 return ret;
1378 }
1379
1380 SE_DEV_PR_ATTR_RO(res_holder);
1381
1382 static ssize_t target_core_dev_pr_show_attr_res_pr_all_tgt_pts(
1383 struct se_device *dev, char *page)
1384 {
1385 ssize_t len = 0;
1386
1387 spin_lock(&dev->dev_reservation_lock);
1388 if (!dev->dev_pr_res_holder) {
1389 len = sprintf(page, "No SPC-3 Reservation holder\n");
1390 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1391 len = sprintf(page, "SPC-3 Reservation: All Target"
1392 " Ports registration\n");
1393 } else {
1394 len = sprintf(page, "SPC-3 Reservation: Single"
1395 " Target Port registration\n");
1396 }
1397
1398 spin_unlock(&dev->dev_reservation_lock);
1399 return len;
1400 }
1401
1402 SE_DEV_PR_ATTR_RO(res_pr_all_tgt_pts);
1403
1404 static ssize_t target_core_dev_pr_show_attr_res_pr_generation(
1405 struct se_device *dev, char *page)
1406 {
1407 return sprintf(page, "0x%08x\n", dev->t10_pr.pr_generation);
1408 }
1409
1410 SE_DEV_PR_ATTR_RO(res_pr_generation);
1411
1412 /*
1413 * res_pr_holder_tg_port
1414 */
1415 static ssize_t target_core_dev_pr_show_attr_res_pr_holder_tg_port(
1416 struct se_device *dev, char *page)
1417 {
1418 struct se_node_acl *se_nacl;
1419 struct se_portal_group *se_tpg;
1420 struct t10_pr_registration *pr_reg;
1421 const struct target_core_fabric_ops *tfo;
1422 ssize_t len = 0;
1423
1424 spin_lock(&dev->dev_reservation_lock);
1425 pr_reg = dev->dev_pr_res_holder;
1426 if (!pr_reg) {
1427 len = sprintf(page, "No SPC-3 Reservation holder\n");
1428 goto out_unlock;
1429 }
1430
1431 se_nacl = pr_reg->pr_reg_nacl;
1432 se_tpg = se_nacl->se_tpg;
1433 tfo = se_tpg->se_tpg_tfo;
1434
1435 len += sprintf(page+len, "SPC-3 Reservation: %s"
1436 " Target Node Endpoint: %s\n", tfo->get_fabric_name(),
1437 tfo->tpg_get_wwn(se_tpg));
1438 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1439 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1440 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1441 tfo->get_fabric_name(), tfo->tpg_get_tag(se_tpg),
1442 tfo->get_fabric_name(), pr_reg->pr_aptpl_target_lun);
1443
1444 out_unlock:
1445 spin_unlock(&dev->dev_reservation_lock);
1446 return len;
1447 }
1448
1449 SE_DEV_PR_ATTR_RO(res_pr_holder_tg_port);
1450
1451 static ssize_t target_core_dev_pr_show_attr_res_pr_registered_i_pts(
1452 struct se_device *dev, char *page)
1453 {
1454 const struct target_core_fabric_ops *tfo;
1455 struct t10_pr_registration *pr_reg;
1456 unsigned char buf[384];
1457 char i_buf[PR_REG_ISID_ID_LEN];
1458 ssize_t len = 0;
1459 int reg_count = 0;
1460
1461 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1462
1463 spin_lock(&dev->t10_pr.registration_lock);
1464 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1465 pr_reg_list) {
1466
1467 memset(buf, 0, 384);
1468 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1469 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1470 core_pr_dump_initiator_port(pr_reg, i_buf,
1471 PR_REG_ISID_ID_LEN);
1472 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1473 tfo->get_fabric_name(),
1474 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1475 pr_reg->pr_res_generation);
1476
1477 if (len + strlen(buf) >= PAGE_SIZE)
1478 break;
1479
1480 len += sprintf(page+len, "%s", buf);
1481 reg_count++;
1482 }
1483 spin_unlock(&dev->t10_pr.registration_lock);
1484
1485 if (!reg_count)
1486 len += sprintf(page+len, "None\n");
1487
1488 return len;
1489 }
1490
1491 SE_DEV_PR_ATTR_RO(res_pr_registered_i_pts);
1492
1493 static ssize_t target_core_dev_pr_show_attr_res_pr_type(
1494 struct se_device *dev, char *page)
1495 {
1496 struct t10_pr_registration *pr_reg;
1497 ssize_t len = 0;
1498
1499 spin_lock(&dev->dev_reservation_lock);
1500 pr_reg = dev->dev_pr_res_holder;
1501 if (pr_reg) {
1502 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1503 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1504 } else {
1505 len = sprintf(page, "No SPC-3 Reservation holder\n");
1506 }
1507
1508 spin_unlock(&dev->dev_reservation_lock);
1509 return len;
1510 }
1511
1512 SE_DEV_PR_ATTR_RO(res_pr_type);
1513
1514 static ssize_t target_core_dev_pr_show_attr_res_type(
1515 struct se_device *dev, char *page)
1516 {
1517 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1518 return sprintf(page, "SPC_PASSTHROUGH\n");
1519 else if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1520 return sprintf(page, "SPC2_RESERVATIONS\n");
1521 else
1522 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1523 }
1524
1525 SE_DEV_PR_ATTR_RO(res_type);
1526
1527 static ssize_t target_core_dev_pr_show_attr_res_aptpl_active(
1528 struct se_device *dev, char *page)
1529 {
1530 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1531 return 0;
1532
1533 return sprintf(page, "APTPL Bit Status: %s\n",
1534 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1535 }
1536
1537 SE_DEV_PR_ATTR_RO(res_aptpl_active);
1538
1539 /*
1540 * res_aptpl_metadata
1541 */
1542 static ssize_t target_core_dev_pr_show_attr_res_aptpl_metadata(
1543 struct se_device *dev, char *page)
1544 {
1545 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1546 return 0;
1547
1548 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1549 }
1550
1551 enum {
1552 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1553 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1554 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1555 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1556 };
1557
1558 static match_table_t tokens = {
1559 {Opt_initiator_fabric, "initiator_fabric=%s"},
1560 {Opt_initiator_node, "initiator_node=%s"},
1561 {Opt_initiator_sid, "initiator_sid=%s"},
1562 {Opt_sa_res_key, "sa_res_key=%s"},
1563 {Opt_res_holder, "res_holder=%d"},
1564 {Opt_res_type, "res_type=%d"},
1565 {Opt_res_scope, "res_scope=%d"},
1566 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1567 {Opt_mapped_lun, "mapped_lun=%lld"},
1568 {Opt_target_fabric, "target_fabric=%s"},
1569 {Opt_target_node, "target_node=%s"},
1570 {Opt_tpgt, "tpgt=%d"},
1571 {Opt_port_rtpi, "port_rtpi=%d"},
1572 {Opt_target_lun, "target_lun=%lld"},
1573 {Opt_err, NULL}
1574 };
1575
1576 static ssize_t target_core_dev_pr_store_attr_res_aptpl_metadata(
1577 struct se_device *dev,
1578 const char *page,
1579 size_t count)
1580 {
1581 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1582 unsigned char *t_fabric = NULL, *t_port = NULL;
1583 char *orig, *ptr, *opts;
1584 substring_t args[MAX_OPT_ARGS];
1585 unsigned long long tmp_ll;
1586 u64 sa_res_key = 0;
1587 u64 mapped_lun = 0, target_lun = 0;
1588 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1589 u16 tpgt = 0;
1590 u8 type = 0;
1591
1592 if (dev->transport->transport_flags & TRANSPORT_FLAG_PASSTHROUGH)
1593 return 0;
1594 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1595 return 0;
1596
1597 if (dev->export_count) {
1598 pr_debug("Unable to process APTPL metadata while"
1599 " active fabric exports exist\n");
1600 return -EINVAL;
1601 }
1602
1603 opts = kstrdup(page, GFP_KERNEL);
1604 if (!opts)
1605 return -ENOMEM;
1606
1607 orig = opts;
1608 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1609 if (!*ptr)
1610 continue;
1611
1612 token = match_token(ptr, tokens, args);
1613 switch (token) {
1614 case Opt_initiator_fabric:
1615 i_fabric = match_strdup(args);
1616 if (!i_fabric) {
1617 ret = -ENOMEM;
1618 goto out;
1619 }
1620 break;
1621 case Opt_initiator_node:
1622 i_port = match_strdup(args);
1623 if (!i_port) {
1624 ret = -ENOMEM;
1625 goto out;
1626 }
1627 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1628 pr_err("APTPL metadata initiator_node="
1629 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1630 PR_APTPL_MAX_IPORT_LEN);
1631 ret = -EINVAL;
1632 break;
1633 }
1634 break;
1635 case Opt_initiator_sid:
1636 isid = match_strdup(args);
1637 if (!isid) {
1638 ret = -ENOMEM;
1639 goto out;
1640 }
1641 if (strlen(isid) >= PR_REG_ISID_LEN) {
1642 pr_err("APTPL metadata initiator_isid"
1643 "= exceeds PR_REG_ISID_LEN: %d\n",
1644 PR_REG_ISID_LEN);
1645 ret = -EINVAL;
1646 break;
1647 }
1648 break;
1649 case Opt_sa_res_key:
1650 ret = kstrtoull(args->from, 0, &tmp_ll);
1651 if (ret < 0) {
1652 pr_err("kstrtoull() failed for sa_res_key=\n");
1653 goto out;
1654 }
1655 sa_res_key = (u64)tmp_ll;
1656 break;
1657 /*
1658 * PR APTPL Metadata for Reservation
1659 */
1660 case Opt_res_holder:
1661 match_int(args, &arg);
1662 res_holder = arg;
1663 break;
1664 case Opt_res_type:
1665 match_int(args, &arg);
1666 type = (u8)arg;
1667 break;
1668 case Opt_res_scope:
1669 match_int(args, &arg);
1670 break;
1671 case Opt_res_all_tg_pt:
1672 match_int(args, &arg);
1673 all_tg_pt = (int)arg;
1674 break;
1675 case Opt_mapped_lun:
1676 match_int(args, &arg);
1677 mapped_lun = (u64)arg;
1678 break;
1679 /*
1680 * PR APTPL Metadata for Target Port
1681 */
1682 case Opt_target_fabric:
1683 t_fabric = match_strdup(args);
1684 if (!t_fabric) {
1685 ret = -ENOMEM;
1686 goto out;
1687 }
1688 break;
1689 case Opt_target_node:
1690 t_port = match_strdup(args);
1691 if (!t_port) {
1692 ret = -ENOMEM;
1693 goto out;
1694 }
1695 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
1696 pr_err("APTPL metadata target_node="
1697 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
1698 PR_APTPL_MAX_TPORT_LEN);
1699 ret = -EINVAL;
1700 break;
1701 }
1702 break;
1703 case Opt_tpgt:
1704 match_int(args, &arg);
1705 tpgt = (u16)arg;
1706 break;
1707 case Opt_port_rtpi:
1708 match_int(args, &arg);
1709 break;
1710 case Opt_target_lun:
1711 match_int(args, &arg);
1712 target_lun = (u64)arg;
1713 break;
1714 default:
1715 break;
1716 }
1717 }
1718
1719 if (!i_port || !t_port || !sa_res_key) {
1720 pr_err("Illegal parameters for APTPL registration\n");
1721 ret = -EINVAL;
1722 goto out;
1723 }
1724
1725 if (res_holder && !(type)) {
1726 pr_err("Illegal PR type: 0x%02x for reservation"
1727 " holder\n", type);
1728 ret = -EINVAL;
1729 goto out;
1730 }
1731
1732 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
1733 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
1734 res_holder, all_tg_pt, type);
1735 out:
1736 kfree(i_fabric);
1737 kfree(i_port);
1738 kfree(isid);
1739 kfree(t_fabric);
1740 kfree(t_port);
1741 kfree(orig);
1742 return (ret == 0) ? count : ret;
1743 }
1744
1745 SE_DEV_PR_ATTR(res_aptpl_metadata, S_IRUGO | S_IWUSR);
1746
1747 CONFIGFS_EATTR_OPS(target_core_dev_pr, se_device, dev_pr_group);
1748
1749 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
1750 &target_core_dev_pr_res_holder.attr,
1751 &target_core_dev_pr_res_pr_all_tgt_pts.attr,
1752 &target_core_dev_pr_res_pr_generation.attr,
1753 &target_core_dev_pr_res_pr_holder_tg_port.attr,
1754 &target_core_dev_pr_res_pr_registered_i_pts.attr,
1755 &target_core_dev_pr_res_pr_type.attr,
1756 &target_core_dev_pr_res_type.attr,
1757 &target_core_dev_pr_res_aptpl_active.attr,
1758 &target_core_dev_pr_res_aptpl_metadata.attr,
1759 NULL,
1760 };
1761
1762 static struct configfs_item_operations target_core_dev_pr_ops = {
1763 .show_attribute = target_core_dev_pr_attr_show,
1764 .store_attribute = target_core_dev_pr_attr_store,
1765 };
1766
1767 TB_CIT_SETUP(dev_pr, &target_core_dev_pr_ops, NULL, target_core_dev_pr_attrs);
1768
1769 /* End functions for struct config_item_type tb_dev_pr_cit */
1770
1771 /* Start functions for struct config_item_type tb_dev_cit */
1772
1773 static ssize_t target_core_show_dev_info(void *p, char *page)
1774 {
1775 struct se_device *dev = p;
1776 int bl = 0;
1777 ssize_t read_bytes = 0;
1778
1779 transport_dump_dev_state(dev, page, &bl);
1780 read_bytes += bl;
1781 read_bytes += dev->transport->show_configfs_dev_params(dev,
1782 page+read_bytes);
1783 return read_bytes;
1784 }
1785
1786 static struct target_core_configfs_attribute target_core_attr_dev_info = {
1787 .attr = { .ca_owner = THIS_MODULE,
1788 .ca_name = "info",
1789 .ca_mode = S_IRUGO },
1790 .show = target_core_show_dev_info,
1791 .store = NULL,
1792 };
1793
1794 static ssize_t target_core_store_dev_control(
1795 void *p,
1796 const char *page,
1797 size_t count)
1798 {
1799 struct se_device *dev = p;
1800
1801 return dev->transport->set_configfs_dev_params(dev, page, count);
1802 }
1803
1804 static struct target_core_configfs_attribute target_core_attr_dev_control = {
1805 .attr = { .ca_owner = THIS_MODULE,
1806 .ca_name = "control",
1807 .ca_mode = S_IWUSR },
1808 .show = NULL,
1809 .store = target_core_store_dev_control,
1810 };
1811
1812 static ssize_t target_core_show_dev_alias(void *p, char *page)
1813 {
1814 struct se_device *dev = p;
1815
1816 if (!(dev->dev_flags & DF_USING_ALIAS))
1817 return 0;
1818
1819 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
1820 }
1821
1822 static ssize_t target_core_store_dev_alias(
1823 void *p,
1824 const char *page,
1825 size_t count)
1826 {
1827 struct se_device *dev = p;
1828 struct se_hba *hba = dev->se_hba;
1829 ssize_t read_bytes;
1830
1831 if (count > (SE_DEV_ALIAS_LEN-1)) {
1832 pr_err("alias count: %d exceeds"
1833 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
1834 SE_DEV_ALIAS_LEN-1);
1835 return -EINVAL;
1836 }
1837
1838 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
1839 if (!read_bytes)
1840 return -EINVAL;
1841 if (dev->dev_alias[read_bytes - 1] == '\n')
1842 dev->dev_alias[read_bytes - 1] = '\0';
1843
1844 dev->dev_flags |= DF_USING_ALIAS;
1845
1846 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
1847 config_item_name(&hba->hba_group.cg_item),
1848 config_item_name(&dev->dev_group.cg_item),
1849 dev->dev_alias);
1850
1851 return read_bytes;
1852 }
1853
1854 static struct target_core_configfs_attribute target_core_attr_dev_alias = {
1855 .attr = { .ca_owner = THIS_MODULE,
1856 .ca_name = "alias",
1857 .ca_mode = S_IRUGO | S_IWUSR },
1858 .show = target_core_show_dev_alias,
1859 .store = target_core_store_dev_alias,
1860 };
1861
1862 static ssize_t target_core_show_dev_udev_path(void *p, char *page)
1863 {
1864 struct se_device *dev = p;
1865
1866 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
1867 return 0;
1868
1869 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
1870 }
1871
1872 static ssize_t target_core_store_dev_udev_path(
1873 void *p,
1874 const char *page,
1875 size_t count)
1876 {
1877 struct se_device *dev = p;
1878 struct se_hba *hba = dev->se_hba;
1879 ssize_t read_bytes;
1880
1881 if (count > (SE_UDEV_PATH_LEN-1)) {
1882 pr_err("udev_path count: %d exceeds"
1883 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
1884 SE_UDEV_PATH_LEN-1);
1885 return -EINVAL;
1886 }
1887
1888 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
1889 "%s", page);
1890 if (!read_bytes)
1891 return -EINVAL;
1892 if (dev->udev_path[read_bytes - 1] == '\n')
1893 dev->udev_path[read_bytes - 1] = '\0';
1894
1895 dev->dev_flags |= DF_USING_UDEV_PATH;
1896
1897 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
1898 config_item_name(&hba->hba_group.cg_item),
1899 config_item_name(&dev->dev_group.cg_item),
1900 dev->udev_path);
1901
1902 return read_bytes;
1903 }
1904
1905 static struct target_core_configfs_attribute target_core_attr_dev_udev_path = {
1906 .attr = { .ca_owner = THIS_MODULE,
1907 .ca_name = "udev_path",
1908 .ca_mode = S_IRUGO | S_IWUSR },
1909 .show = target_core_show_dev_udev_path,
1910 .store = target_core_store_dev_udev_path,
1911 };
1912
1913 static ssize_t target_core_show_dev_enable(void *p, char *page)
1914 {
1915 struct se_device *dev = p;
1916
1917 return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
1918 }
1919
1920 static ssize_t target_core_store_dev_enable(
1921 void *p,
1922 const char *page,
1923 size_t count)
1924 {
1925 struct se_device *dev = p;
1926 char *ptr;
1927 int ret;
1928
1929 ptr = strstr(page, "1");
1930 if (!ptr) {
1931 pr_err("For dev_enable ops, only valid value"
1932 " is \"1\"\n");
1933 return -EINVAL;
1934 }
1935
1936 ret = target_configure_device(dev);
1937 if (ret)
1938 return ret;
1939 return count;
1940 }
1941
1942 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
1943 .attr = { .ca_owner = THIS_MODULE,
1944 .ca_name = "enable",
1945 .ca_mode = S_IRUGO | S_IWUSR },
1946 .show = target_core_show_dev_enable,
1947 .store = target_core_store_dev_enable,
1948 };
1949
1950 static ssize_t target_core_show_alua_lu_gp(void *p, char *page)
1951 {
1952 struct se_device *dev = p;
1953 struct config_item *lu_ci;
1954 struct t10_alua_lu_gp *lu_gp;
1955 struct t10_alua_lu_gp_member *lu_gp_mem;
1956 ssize_t len = 0;
1957
1958 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1959 if (!lu_gp_mem)
1960 return 0;
1961
1962 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
1963 lu_gp = lu_gp_mem->lu_gp;
1964 if (lu_gp) {
1965 lu_ci = &lu_gp->lu_gp_group.cg_item;
1966 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
1967 config_item_name(lu_ci), lu_gp->lu_gp_id);
1968 }
1969 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
1970
1971 return len;
1972 }
1973
1974 static ssize_t target_core_store_alua_lu_gp(
1975 void *p,
1976 const char *page,
1977 size_t count)
1978 {
1979 struct se_device *dev = p;
1980 struct se_hba *hba = dev->se_hba;
1981 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
1982 struct t10_alua_lu_gp_member *lu_gp_mem;
1983 unsigned char buf[LU_GROUP_NAME_BUF];
1984 int move = 0;
1985
1986 lu_gp_mem = dev->dev_alua_lu_gp_mem;
1987 if (!lu_gp_mem)
1988 return 0;
1989
1990 if (count > LU_GROUP_NAME_BUF) {
1991 pr_err("ALUA LU Group Alias too large!\n");
1992 return -EINVAL;
1993 }
1994 memset(buf, 0, LU_GROUP_NAME_BUF);
1995 memcpy(buf, page, count);
1996 /*
1997 * Any ALUA logical unit alias besides "NULL" means we will be
1998 * making a new group association.
1999 */
2000 if (strcmp(strstrip(buf), "NULL")) {
2001 /*
2002 * core_alua_get_lu_gp_by_name() will increment reference to
2003 * struct t10_alua_lu_gp. This reference is released with
2004 * core_alua_get_lu_gp_by_name below().
2005 */
2006 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2007 if (!lu_gp_new)
2008 return -ENODEV;
2009 }
2010
2011 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2012 lu_gp = lu_gp_mem->lu_gp;
2013 if (lu_gp) {
2014 /*
2015 * Clearing an existing lu_gp association, and replacing
2016 * with NULL
2017 */
2018 if (!lu_gp_new) {
2019 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2020 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2021 " %hu\n",
2022 config_item_name(&hba->hba_group.cg_item),
2023 config_item_name(&dev->dev_group.cg_item),
2024 config_item_name(&lu_gp->lu_gp_group.cg_item),
2025 lu_gp->lu_gp_id);
2026
2027 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2028 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2029
2030 return count;
2031 }
2032 /*
2033 * Removing existing association of lu_gp_mem with lu_gp
2034 */
2035 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2036 move = 1;
2037 }
2038 /*
2039 * Associate lu_gp_mem with lu_gp_new.
2040 */
2041 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2042 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2043
2044 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2045 " core/alua/lu_gps/%s, ID: %hu\n",
2046 (move) ? "Moving" : "Adding",
2047 config_item_name(&hba->hba_group.cg_item),
2048 config_item_name(&dev->dev_group.cg_item),
2049 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2050 lu_gp_new->lu_gp_id);
2051
2052 core_alua_put_lu_gp_from_name(lu_gp_new);
2053 return count;
2054 }
2055
2056 static struct target_core_configfs_attribute target_core_attr_dev_alua_lu_gp = {
2057 .attr = { .ca_owner = THIS_MODULE,
2058 .ca_name = "alua_lu_gp",
2059 .ca_mode = S_IRUGO | S_IWUSR },
2060 .show = target_core_show_alua_lu_gp,
2061 .store = target_core_store_alua_lu_gp,
2062 };
2063
2064 static ssize_t target_core_show_dev_lba_map(void *p, char *page)
2065 {
2066 struct se_device *dev = p;
2067 struct t10_alua_lba_map *map;
2068 struct t10_alua_lba_map_member *mem;
2069 char *b = page;
2070 int bl = 0;
2071 char state;
2072
2073 spin_lock(&dev->t10_alua.lba_map_lock);
2074 if (!list_empty(&dev->t10_alua.lba_map_list))
2075 bl += sprintf(b + bl, "%u %u\n",
2076 dev->t10_alua.lba_map_segment_size,
2077 dev->t10_alua.lba_map_segment_multiplier);
2078 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2079 bl += sprintf(b + bl, "%llu %llu",
2080 map->lba_map_first_lba, map->lba_map_last_lba);
2081 list_for_each_entry(mem, &map->lba_map_mem_list,
2082 lba_map_mem_list) {
2083 switch (mem->lba_map_mem_alua_state) {
2084 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2085 state = 'O';
2086 break;
2087 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2088 state = 'A';
2089 break;
2090 case ALUA_ACCESS_STATE_STANDBY:
2091 state = 'S';
2092 break;
2093 case ALUA_ACCESS_STATE_UNAVAILABLE:
2094 state = 'U';
2095 break;
2096 default:
2097 state = '.';
2098 break;
2099 }
2100 bl += sprintf(b + bl, " %d:%c",
2101 mem->lba_map_mem_alua_pg_id, state);
2102 }
2103 bl += sprintf(b + bl, "\n");
2104 }
2105 spin_unlock(&dev->t10_alua.lba_map_lock);
2106 return bl;
2107 }
2108
2109 static ssize_t target_core_store_dev_lba_map(
2110 void *p,
2111 const char *page,
2112 size_t count)
2113 {
2114 struct se_device *dev = p;
2115 struct t10_alua_lba_map *lba_map = NULL;
2116 struct list_head lba_list;
2117 char *map_entries, *ptr;
2118 char state;
2119 int pg_num = -1, pg;
2120 int ret = 0, num = 0, pg_id, alua_state;
2121 unsigned long start_lba = -1, end_lba = -1;
2122 unsigned long segment_size = -1, segment_mult = -1;
2123
2124 map_entries = kstrdup(page, GFP_KERNEL);
2125 if (!map_entries)
2126 return -ENOMEM;
2127
2128 INIT_LIST_HEAD(&lba_list);
2129 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2130 if (!*ptr)
2131 continue;
2132
2133 if (num == 0) {
2134 if (sscanf(ptr, "%lu %lu\n",
2135 &segment_size, &segment_mult) != 2) {
2136 pr_err("Invalid line %d\n", num);
2137 ret = -EINVAL;
2138 break;
2139 }
2140 num++;
2141 continue;
2142 }
2143 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2144 pr_err("Invalid line %d\n", num);
2145 ret = -EINVAL;
2146 break;
2147 }
2148 ptr = strchr(ptr, ' ');
2149 if (!ptr) {
2150 pr_err("Invalid line %d, missing end lba\n", num);
2151 ret = -EINVAL;
2152 break;
2153 }
2154 ptr++;
2155 ptr = strchr(ptr, ' ');
2156 if (!ptr) {
2157 pr_err("Invalid line %d, missing state definitions\n",
2158 num);
2159 ret = -EINVAL;
2160 break;
2161 }
2162 ptr++;
2163 lba_map = core_alua_allocate_lba_map(&lba_list,
2164 start_lba, end_lba);
2165 if (IS_ERR(lba_map)) {
2166 ret = PTR_ERR(lba_map);
2167 break;
2168 }
2169 pg = 0;
2170 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2171 switch (state) {
2172 case 'O':
2173 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2174 break;
2175 case 'A':
2176 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2177 break;
2178 case 'S':
2179 alua_state = ALUA_ACCESS_STATE_STANDBY;
2180 break;
2181 case 'U':
2182 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2183 break;
2184 default:
2185 pr_err("Invalid ALUA state '%c'\n", state);
2186 ret = -EINVAL;
2187 goto out;
2188 }
2189
2190 ret = core_alua_allocate_lba_map_mem(lba_map,
2191 pg_id, alua_state);
2192 if (ret) {
2193 pr_err("Invalid target descriptor %d:%c "
2194 "at line %d\n",
2195 pg_id, state, num);
2196 break;
2197 }
2198 pg++;
2199 ptr = strchr(ptr, ' ');
2200 if (ptr)
2201 ptr++;
2202 else
2203 break;
2204 }
2205 if (pg_num == -1)
2206 pg_num = pg;
2207 else if (pg != pg_num) {
2208 pr_err("Only %d from %d port groups definitions "
2209 "at line %d\n", pg, pg_num, num);
2210 ret = -EINVAL;
2211 break;
2212 }
2213 num++;
2214 }
2215 out:
2216 if (ret) {
2217 core_alua_free_lba_map(&lba_list);
2218 count = ret;
2219 } else
2220 core_alua_set_lba_map(dev, &lba_list,
2221 segment_size, segment_mult);
2222 kfree(map_entries);
2223 return count;
2224 }
2225
2226 static struct target_core_configfs_attribute target_core_attr_dev_lba_map = {
2227 .attr = { .ca_owner = THIS_MODULE,
2228 .ca_name = "lba_map",
2229 .ca_mode = S_IRUGO | S_IWUSR },
2230 .show = target_core_show_dev_lba_map,
2231 .store = target_core_store_dev_lba_map,
2232 };
2233
2234 static struct configfs_attribute *target_core_dev_attrs[] = {
2235 &target_core_attr_dev_info.attr,
2236 &target_core_attr_dev_control.attr,
2237 &target_core_attr_dev_alias.attr,
2238 &target_core_attr_dev_udev_path.attr,
2239 &target_core_attr_dev_enable.attr,
2240 &target_core_attr_dev_alua_lu_gp.attr,
2241 &target_core_attr_dev_lba_map.attr,
2242 NULL,
2243 };
2244
2245 static void target_core_dev_release(struct config_item *item)
2246 {
2247 struct config_group *dev_cg = to_config_group(item);
2248 struct se_device *dev =
2249 container_of(dev_cg, struct se_device, dev_group);
2250
2251 kfree(dev_cg->default_groups);
2252 target_free_device(dev);
2253 }
2254
2255 static ssize_t target_core_dev_show(struct config_item *item,
2256 struct configfs_attribute *attr,
2257 char *page)
2258 {
2259 struct config_group *dev_cg = to_config_group(item);
2260 struct se_device *dev =
2261 container_of(dev_cg, struct se_device, dev_group);
2262 struct target_core_configfs_attribute *tc_attr = container_of(
2263 attr, struct target_core_configfs_attribute, attr);
2264
2265 if (!tc_attr->show)
2266 return -EINVAL;
2267
2268 return tc_attr->show(dev, page);
2269 }
2270
2271 static ssize_t target_core_dev_store(struct config_item *item,
2272 struct configfs_attribute *attr,
2273 const char *page, size_t count)
2274 {
2275 struct config_group *dev_cg = to_config_group(item);
2276 struct se_device *dev =
2277 container_of(dev_cg, struct se_device, dev_group);
2278 struct target_core_configfs_attribute *tc_attr = container_of(
2279 attr, struct target_core_configfs_attribute, attr);
2280
2281 if (!tc_attr->store)
2282 return -EINVAL;
2283
2284 return tc_attr->store(dev, page, count);
2285 }
2286
2287 static struct configfs_item_operations target_core_dev_item_ops = {
2288 .release = target_core_dev_release,
2289 .show_attribute = target_core_dev_show,
2290 .store_attribute = target_core_dev_store,
2291 };
2292
2293 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2294
2295 /* End functions for struct config_item_type tb_dev_cit */
2296
2297 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2298
2299 CONFIGFS_EATTR_STRUCT(target_core_alua_lu_gp, t10_alua_lu_gp);
2300 #define SE_DEV_ALUA_LU_ATTR(_name, _mode) \
2301 static struct target_core_alua_lu_gp_attribute \
2302 target_core_alua_lu_gp_##_name = \
2303 __CONFIGFS_EATTR(_name, _mode, \
2304 target_core_alua_lu_gp_show_attr_##_name, \
2305 target_core_alua_lu_gp_store_attr_##_name);
2306
2307 #define SE_DEV_ALUA_LU_ATTR_RO(_name) \
2308 static struct target_core_alua_lu_gp_attribute \
2309 target_core_alua_lu_gp_##_name = \
2310 __CONFIGFS_EATTR_RO(_name, \
2311 target_core_alua_lu_gp_show_attr_##_name);
2312
2313 /*
2314 * lu_gp_id
2315 */
2316 static ssize_t target_core_alua_lu_gp_show_attr_lu_gp_id(
2317 struct t10_alua_lu_gp *lu_gp,
2318 char *page)
2319 {
2320 if (!lu_gp->lu_gp_valid_id)
2321 return 0;
2322
2323 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2324 }
2325
2326 static ssize_t target_core_alua_lu_gp_store_attr_lu_gp_id(
2327 struct t10_alua_lu_gp *lu_gp,
2328 const char *page,
2329 size_t count)
2330 {
2331 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2332 unsigned long lu_gp_id;
2333 int ret;
2334
2335 ret = kstrtoul(page, 0, &lu_gp_id);
2336 if (ret < 0) {
2337 pr_err("kstrtoul() returned %d for"
2338 " lu_gp_id\n", ret);
2339 return ret;
2340 }
2341 if (lu_gp_id > 0x0000ffff) {
2342 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2343 " 0x0000ffff\n", lu_gp_id);
2344 return -EINVAL;
2345 }
2346
2347 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2348 if (ret < 0)
2349 return -EINVAL;
2350
2351 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2352 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2353 config_item_name(&alua_lu_gp_cg->cg_item),
2354 lu_gp->lu_gp_id);
2355
2356 return count;
2357 }
2358
2359 SE_DEV_ALUA_LU_ATTR(lu_gp_id, S_IRUGO | S_IWUSR);
2360
2361 /*
2362 * members
2363 */
2364 static ssize_t target_core_alua_lu_gp_show_attr_members(
2365 struct t10_alua_lu_gp *lu_gp,
2366 char *page)
2367 {
2368 struct se_device *dev;
2369 struct se_hba *hba;
2370 struct t10_alua_lu_gp_member *lu_gp_mem;
2371 ssize_t len = 0, cur_len;
2372 unsigned char buf[LU_GROUP_NAME_BUF];
2373
2374 memset(buf, 0, LU_GROUP_NAME_BUF);
2375
2376 spin_lock(&lu_gp->lu_gp_lock);
2377 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2378 dev = lu_gp_mem->lu_gp_mem_dev;
2379 hba = dev->se_hba;
2380
2381 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2382 config_item_name(&hba->hba_group.cg_item),
2383 config_item_name(&dev->dev_group.cg_item));
2384 cur_len++; /* Extra byte for NULL terminator */
2385
2386 if ((cur_len + len) > PAGE_SIZE) {
2387 pr_warn("Ran out of lu_gp_show_attr"
2388 "_members buffer\n");
2389 break;
2390 }
2391 memcpy(page+len, buf, cur_len);
2392 len += cur_len;
2393 }
2394 spin_unlock(&lu_gp->lu_gp_lock);
2395
2396 return len;
2397 }
2398
2399 SE_DEV_ALUA_LU_ATTR_RO(members);
2400
2401 CONFIGFS_EATTR_OPS(target_core_alua_lu_gp, t10_alua_lu_gp, lu_gp_group);
2402
2403 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2404 &target_core_alua_lu_gp_lu_gp_id.attr,
2405 &target_core_alua_lu_gp_members.attr,
2406 NULL,
2407 };
2408
2409 static void target_core_alua_lu_gp_release(struct config_item *item)
2410 {
2411 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2412 struct t10_alua_lu_gp, lu_gp_group);
2413
2414 core_alua_free_lu_gp(lu_gp);
2415 }
2416
2417 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2418 .release = target_core_alua_lu_gp_release,
2419 .show_attribute = target_core_alua_lu_gp_attr_show,
2420 .store_attribute = target_core_alua_lu_gp_attr_store,
2421 };
2422
2423 static struct config_item_type target_core_alua_lu_gp_cit = {
2424 .ct_item_ops = &target_core_alua_lu_gp_ops,
2425 .ct_attrs = target_core_alua_lu_gp_attrs,
2426 .ct_owner = THIS_MODULE,
2427 };
2428
2429 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2430
2431 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2432
2433 static struct config_group *target_core_alua_create_lu_gp(
2434 struct config_group *group,
2435 const char *name)
2436 {
2437 struct t10_alua_lu_gp *lu_gp;
2438 struct config_group *alua_lu_gp_cg = NULL;
2439 struct config_item *alua_lu_gp_ci = NULL;
2440
2441 lu_gp = core_alua_allocate_lu_gp(name, 0);
2442 if (IS_ERR(lu_gp))
2443 return NULL;
2444
2445 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2446 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2447
2448 config_group_init_type_name(alua_lu_gp_cg, name,
2449 &target_core_alua_lu_gp_cit);
2450
2451 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2452 " Group: core/alua/lu_gps/%s\n",
2453 config_item_name(alua_lu_gp_ci));
2454
2455 return alua_lu_gp_cg;
2456
2457 }
2458
2459 static void target_core_alua_drop_lu_gp(
2460 struct config_group *group,
2461 struct config_item *item)
2462 {
2463 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2464 struct t10_alua_lu_gp, lu_gp_group);
2465
2466 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2467 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2468 config_item_name(item), lu_gp->lu_gp_id);
2469 /*
2470 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2471 * -> target_core_alua_lu_gp_release()
2472 */
2473 config_item_put(item);
2474 }
2475
2476 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2477 .make_group = &target_core_alua_create_lu_gp,
2478 .drop_item = &target_core_alua_drop_lu_gp,
2479 };
2480
2481 static struct config_item_type target_core_alua_lu_gps_cit = {
2482 .ct_item_ops = NULL,
2483 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2484 .ct_owner = THIS_MODULE,
2485 };
2486
2487 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2488
2489 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2490
2491 CONFIGFS_EATTR_STRUCT(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp);
2492 #define SE_DEV_ALUA_TG_PT_ATTR(_name, _mode) \
2493 static struct target_core_alua_tg_pt_gp_attribute \
2494 target_core_alua_tg_pt_gp_##_name = \
2495 __CONFIGFS_EATTR(_name, _mode, \
2496 target_core_alua_tg_pt_gp_show_attr_##_name, \
2497 target_core_alua_tg_pt_gp_store_attr_##_name);
2498
2499 #define SE_DEV_ALUA_TG_PT_ATTR_RO(_name) \
2500 static struct target_core_alua_tg_pt_gp_attribute \
2501 target_core_alua_tg_pt_gp_##_name = \
2502 __CONFIGFS_EATTR_RO(_name, \
2503 target_core_alua_tg_pt_gp_show_attr_##_name);
2504
2505 /*
2506 * alua_access_state
2507 */
2508 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_state(
2509 struct t10_alua_tg_pt_gp *tg_pt_gp,
2510 char *page)
2511 {
2512 return sprintf(page, "%d\n",
2513 atomic_read(&tg_pt_gp->tg_pt_gp_alua_access_state));
2514 }
2515
2516 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_state(
2517 struct t10_alua_tg_pt_gp *tg_pt_gp,
2518 const char *page,
2519 size_t count)
2520 {
2521 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2522 unsigned long tmp;
2523 int new_state, ret;
2524
2525 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2526 pr_err("Unable to do implicit ALUA on non valid"
2527 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2528 return -EINVAL;
2529 }
2530 if (!(dev->dev_flags & DF_CONFIGURED)) {
2531 pr_err("Unable to set alua_access_state while device is"
2532 " not configured\n");
2533 return -ENODEV;
2534 }
2535
2536 ret = kstrtoul(page, 0, &tmp);
2537 if (ret < 0) {
2538 pr_err("Unable to extract new ALUA access state from"
2539 " %s\n", page);
2540 return ret;
2541 }
2542 new_state = (int)tmp;
2543
2544 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2545 pr_err("Unable to process implicit configfs ALUA"
2546 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2547 return -EINVAL;
2548 }
2549 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2550 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2551 /* LBA DEPENDENT is only allowed with implicit ALUA */
2552 pr_err("Unable to process implicit configfs ALUA transition"
2553 " while explicit ALUA management is enabled\n");
2554 return -EINVAL;
2555 }
2556
2557 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2558 NULL, NULL, new_state, 0);
2559 return (!ret) ? count : -EINVAL;
2560 }
2561
2562 SE_DEV_ALUA_TG_PT_ATTR(alua_access_state, S_IRUGO | S_IWUSR);
2563
2564 /*
2565 * alua_access_status
2566 */
2567 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_status(
2568 struct t10_alua_tg_pt_gp *tg_pt_gp,
2569 char *page)
2570 {
2571 return sprintf(page, "%s\n",
2572 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2573 }
2574
2575 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_status(
2576 struct t10_alua_tg_pt_gp *tg_pt_gp,
2577 const char *page,
2578 size_t count)
2579 {
2580 unsigned long tmp;
2581 int new_status, ret;
2582
2583 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2584 pr_err("Unable to do set ALUA access status on non"
2585 " valid tg_pt_gp ID: %hu\n",
2586 tg_pt_gp->tg_pt_gp_valid_id);
2587 return -EINVAL;
2588 }
2589
2590 ret = kstrtoul(page, 0, &tmp);
2591 if (ret < 0) {
2592 pr_err("Unable to extract new ALUA access status"
2593 " from %s\n", page);
2594 return ret;
2595 }
2596 new_status = (int)tmp;
2597
2598 if ((new_status != ALUA_STATUS_NONE) &&
2599 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2600 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2601 pr_err("Illegal ALUA access status: 0x%02x\n",
2602 new_status);
2603 return -EINVAL;
2604 }
2605
2606 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2607 return count;
2608 }
2609
2610 SE_DEV_ALUA_TG_PT_ATTR(alua_access_status, S_IRUGO | S_IWUSR);
2611
2612 /*
2613 * alua_access_type
2614 */
2615 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_access_type(
2616 struct t10_alua_tg_pt_gp *tg_pt_gp,
2617 char *page)
2618 {
2619 return core_alua_show_access_type(tg_pt_gp, page);
2620 }
2621
2622 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_access_type(
2623 struct t10_alua_tg_pt_gp *tg_pt_gp,
2624 const char *page,
2625 size_t count)
2626 {
2627 return core_alua_store_access_type(tg_pt_gp, page, count);
2628 }
2629
2630 SE_DEV_ALUA_TG_PT_ATTR(alua_access_type, S_IRUGO | S_IWUSR);
2631
2632 /*
2633 * alua_supported_states
2634 */
2635
2636 #define SE_DEV_ALUA_SUPPORT_STATE_SHOW(_name, _var, _bit) \
2637 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_support_##_name( \
2638 struct t10_alua_tg_pt_gp *t, char *p) \
2639 { \
2640 return sprintf(p, "%d\n", !!(t->_var & _bit)); \
2641 }
2642
2643 #define SE_DEV_ALUA_SUPPORT_STATE_STORE(_name, _var, _bit) \
2644 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_support_##_name(\
2645 struct t10_alua_tg_pt_gp *t, const char *p, size_t c) \
2646 { \
2647 unsigned long tmp; \
2648 int ret; \
2649 \
2650 if (!t->tg_pt_gp_valid_id) { \
2651 pr_err("Unable to do set ##_name ALUA state on non" \
2652 " valid tg_pt_gp ID: %hu\n", \
2653 t->tg_pt_gp_valid_id); \
2654 return -EINVAL; \
2655 } \
2656 \
2657 ret = kstrtoul(p, 0, &tmp); \
2658 if (ret < 0) { \
2659 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2660 return -EINVAL; \
2661 } \
2662 if (tmp > 1) { \
2663 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2664 return -EINVAL; \
2665 } \
2666 if (tmp) \
2667 t->_var |= _bit; \
2668 else \
2669 t->_var &= ~_bit; \
2670 \
2671 return c; \
2672 }
2673
2674 SE_DEV_ALUA_SUPPORT_STATE_SHOW(transitioning,
2675 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2676 SE_DEV_ALUA_SUPPORT_STATE_STORE(transitioning,
2677 tg_pt_gp_alua_supported_states, ALUA_T_SUP);
2678 SE_DEV_ALUA_TG_PT_ATTR(alua_support_transitioning, S_IRUGO | S_IWUSR);
2679
2680 SE_DEV_ALUA_SUPPORT_STATE_SHOW(offline,
2681 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2682 SE_DEV_ALUA_SUPPORT_STATE_STORE(offline,
2683 tg_pt_gp_alua_supported_states, ALUA_O_SUP);
2684 SE_DEV_ALUA_TG_PT_ATTR(alua_support_offline, S_IRUGO | S_IWUSR);
2685
2686 SE_DEV_ALUA_SUPPORT_STATE_SHOW(lba_dependent,
2687 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2688 SE_DEV_ALUA_SUPPORT_STATE_STORE(lba_dependent,
2689 tg_pt_gp_alua_supported_states, ALUA_LBD_SUP);
2690 SE_DEV_ALUA_TG_PT_ATTR(alua_support_lba_dependent, S_IRUGO);
2691
2692 SE_DEV_ALUA_SUPPORT_STATE_SHOW(unavailable,
2693 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2694 SE_DEV_ALUA_SUPPORT_STATE_STORE(unavailable,
2695 tg_pt_gp_alua_supported_states, ALUA_U_SUP);
2696 SE_DEV_ALUA_TG_PT_ATTR(alua_support_unavailable, S_IRUGO | S_IWUSR);
2697
2698 SE_DEV_ALUA_SUPPORT_STATE_SHOW(standby,
2699 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2700 SE_DEV_ALUA_SUPPORT_STATE_STORE(standby,
2701 tg_pt_gp_alua_supported_states, ALUA_S_SUP);
2702 SE_DEV_ALUA_TG_PT_ATTR(alua_support_standby, S_IRUGO | S_IWUSR);
2703
2704 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_optimized,
2705 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2706 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_optimized,
2707 tg_pt_gp_alua_supported_states, ALUA_AO_SUP);
2708 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_optimized, S_IRUGO | S_IWUSR);
2709
2710 SE_DEV_ALUA_SUPPORT_STATE_SHOW(active_nonoptimized,
2711 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2712 SE_DEV_ALUA_SUPPORT_STATE_STORE(active_nonoptimized,
2713 tg_pt_gp_alua_supported_states, ALUA_AN_SUP);
2714 SE_DEV_ALUA_TG_PT_ATTR(alua_support_active_nonoptimized, S_IRUGO | S_IWUSR);
2715
2716 /*
2717 * alua_write_metadata
2718 */
2719 static ssize_t target_core_alua_tg_pt_gp_show_attr_alua_write_metadata(
2720 struct t10_alua_tg_pt_gp *tg_pt_gp,
2721 char *page)
2722 {
2723 return sprintf(page, "%d\n", tg_pt_gp->tg_pt_gp_write_metadata);
2724 }
2725
2726 static ssize_t target_core_alua_tg_pt_gp_store_attr_alua_write_metadata(
2727 struct t10_alua_tg_pt_gp *tg_pt_gp,
2728 const char *page,
2729 size_t count)
2730 {
2731 unsigned long tmp;
2732 int ret;
2733
2734 ret = kstrtoul(page, 0, &tmp);
2735 if (ret < 0) {
2736 pr_err("Unable to extract alua_write_metadata\n");
2737 return ret;
2738 }
2739
2740 if ((tmp != 0) && (tmp != 1)) {
2741 pr_err("Illegal value for alua_write_metadata:"
2742 " %lu\n", tmp);
2743 return -EINVAL;
2744 }
2745 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2746
2747 return count;
2748 }
2749
2750 SE_DEV_ALUA_TG_PT_ATTR(alua_write_metadata, S_IRUGO | S_IWUSR);
2751
2752
2753
2754 /*
2755 * nonop_delay_msecs
2756 */
2757 static ssize_t target_core_alua_tg_pt_gp_show_attr_nonop_delay_msecs(
2758 struct t10_alua_tg_pt_gp *tg_pt_gp,
2759 char *page)
2760 {
2761 return core_alua_show_nonop_delay_msecs(tg_pt_gp, page);
2762
2763 }
2764
2765 static ssize_t target_core_alua_tg_pt_gp_store_attr_nonop_delay_msecs(
2766 struct t10_alua_tg_pt_gp *tg_pt_gp,
2767 const char *page,
2768 size_t count)
2769 {
2770 return core_alua_store_nonop_delay_msecs(tg_pt_gp, page, count);
2771 }
2772
2773 SE_DEV_ALUA_TG_PT_ATTR(nonop_delay_msecs, S_IRUGO | S_IWUSR);
2774
2775 /*
2776 * trans_delay_msecs
2777 */
2778 static ssize_t target_core_alua_tg_pt_gp_show_attr_trans_delay_msecs(
2779 struct t10_alua_tg_pt_gp *tg_pt_gp,
2780 char *page)
2781 {
2782 return core_alua_show_trans_delay_msecs(tg_pt_gp, page);
2783 }
2784
2785 static ssize_t target_core_alua_tg_pt_gp_store_attr_trans_delay_msecs(
2786 struct t10_alua_tg_pt_gp *tg_pt_gp,
2787 const char *page,
2788 size_t count)
2789 {
2790 return core_alua_store_trans_delay_msecs(tg_pt_gp, page, count);
2791 }
2792
2793 SE_DEV_ALUA_TG_PT_ATTR(trans_delay_msecs, S_IRUGO | S_IWUSR);
2794
2795 /*
2796 * implicit_trans_secs
2797 */
2798 static ssize_t target_core_alua_tg_pt_gp_show_attr_implicit_trans_secs(
2799 struct t10_alua_tg_pt_gp *tg_pt_gp,
2800 char *page)
2801 {
2802 return core_alua_show_implicit_trans_secs(tg_pt_gp, page);
2803 }
2804
2805 static ssize_t target_core_alua_tg_pt_gp_store_attr_implicit_trans_secs(
2806 struct t10_alua_tg_pt_gp *tg_pt_gp,
2807 const char *page,
2808 size_t count)
2809 {
2810 return core_alua_store_implicit_trans_secs(tg_pt_gp, page, count);
2811 }
2812
2813 SE_DEV_ALUA_TG_PT_ATTR(implicit_trans_secs, S_IRUGO | S_IWUSR);
2814
2815 /*
2816 * preferred
2817 */
2818
2819 static ssize_t target_core_alua_tg_pt_gp_show_attr_preferred(
2820 struct t10_alua_tg_pt_gp *tg_pt_gp,
2821 char *page)
2822 {
2823 return core_alua_show_preferred_bit(tg_pt_gp, page);
2824 }
2825
2826 static ssize_t target_core_alua_tg_pt_gp_store_attr_preferred(
2827 struct t10_alua_tg_pt_gp *tg_pt_gp,
2828 const char *page,
2829 size_t count)
2830 {
2831 return core_alua_store_preferred_bit(tg_pt_gp, page, count);
2832 }
2833
2834 SE_DEV_ALUA_TG_PT_ATTR(preferred, S_IRUGO | S_IWUSR);
2835
2836 /*
2837 * tg_pt_gp_id
2838 */
2839 static ssize_t target_core_alua_tg_pt_gp_show_attr_tg_pt_gp_id(
2840 struct t10_alua_tg_pt_gp *tg_pt_gp,
2841 char *page)
2842 {
2843 if (!tg_pt_gp->tg_pt_gp_valid_id)
2844 return 0;
2845
2846 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2847 }
2848
2849 static ssize_t target_core_alua_tg_pt_gp_store_attr_tg_pt_gp_id(
2850 struct t10_alua_tg_pt_gp *tg_pt_gp,
2851 const char *page,
2852 size_t count)
2853 {
2854 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2855 unsigned long tg_pt_gp_id;
2856 int ret;
2857
2858 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2859 if (ret < 0) {
2860 pr_err("kstrtoul() returned %d for"
2861 " tg_pt_gp_id\n", ret);
2862 return ret;
2863 }
2864 if (tg_pt_gp_id > 0x0000ffff) {
2865 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum:"
2866 " 0x0000ffff\n", tg_pt_gp_id);
2867 return -EINVAL;
2868 }
2869
2870 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
2871 if (ret < 0)
2872 return -EINVAL;
2873
2874 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
2875 "core/alua/tg_pt_gps/%s to ID: %hu\n",
2876 config_item_name(&alua_tg_pt_gp_cg->cg_item),
2877 tg_pt_gp->tg_pt_gp_id);
2878
2879 return count;
2880 }
2881
2882 SE_DEV_ALUA_TG_PT_ATTR(tg_pt_gp_id, S_IRUGO | S_IWUSR);
2883
2884 /*
2885 * members
2886 */
2887 static ssize_t target_core_alua_tg_pt_gp_show_attr_members(
2888 struct t10_alua_tg_pt_gp *tg_pt_gp,
2889 char *page)
2890 {
2891 struct se_lun *lun;
2892 ssize_t len = 0, cur_len;
2893 unsigned char buf[TG_PT_GROUP_NAME_BUF];
2894
2895 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
2896
2897 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
2898 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
2899 lun_tg_pt_gp_link) {
2900 struct se_portal_group *tpg = lun->lun_tpg;
2901
2902 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
2903 "/%s\n", tpg->se_tpg_tfo->get_fabric_name(),
2904 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
2905 tpg->se_tpg_tfo->tpg_get_tag(tpg),
2906 config_item_name(&lun->lun_group.cg_item));
2907 cur_len++; /* Extra byte for NULL terminator */
2908
2909 if ((cur_len + len) > PAGE_SIZE) {
2910 pr_warn("Ran out of lu_gp_show_attr"
2911 "_members buffer\n");
2912 break;
2913 }
2914 memcpy(page+len, buf, cur_len);
2915 len += cur_len;
2916 }
2917 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
2918
2919 return len;
2920 }
2921
2922 SE_DEV_ALUA_TG_PT_ATTR_RO(members);
2923
2924 CONFIGFS_EATTR_OPS(target_core_alua_tg_pt_gp, t10_alua_tg_pt_gp,
2925 tg_pt_gp_group);
2926
2927 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
2928 &target_core_alua_tg_pt_gp_alua_access_state.attr,
2929 &target_core_alua_tg_pt_gp_alua_access_status.attr,
2930 &target_core_alua_tg_pt_gp_alua_access_type.attr,
2931 &target_core_alua_tg_pt_gp_alua_support_transitioning.attr,
2932 &target_core_alua_tg_pt_gp_alua_support_offline.attr,
2933 &target_core_alua_tg_pt_gp_alua_support_lba_dependent.attr,
2934 &target_core_alua_tg_pt_gp_alua_support_unavailable.attr,
2935 &target_core_alua_tg_pt_gp_alua_support_standby.attr,
2936 &target_core_alua_tg_pt_gp_alua_support_active_nonoptimized.attr,
2937 &target_core_alua_tg_pt_gp_alua_support_active_optimized.attr,
2938 &target_core_alua_tg_pt_gp_alua_write_metadata.attr,
2939 &target_core_alua_tg_pt_gp_nonop_delay_msecs.attr,
2940 &target_core_alua_tg_pt_gp_trans_delay_msecs.attr,
2941 &target_core_alua_tg_pt_gp_implicit_trans_secs.attr,
2942 &target_core_alua_tg_pt_gp_preferred.attr,
2943 &target_core_alua_tg_pt_gp_tg_pt_gp_id.attr,
2944 &target_core_alua_tg_pt_gp_members.attr,
2945 NULL,
2946 };
2947
2948 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
2949 {
2950 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
2951 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
2952
2953 core_alua_free_tg_pt_gp(tg_pt_gp);
2954 }
2955
2956 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
2957 .release = target_core_alua_tg_pt_gp_release,
2958 .show_attribute = target_core_alua_tg_pt_gp_attr_show,
2959 .store_attribute = target_core_alua_tg_pt_gp_attr_store,
2960 };
2961
2962 static struct config_item_type target_core_alua_tg_pt_gp_cit = {
2963 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
2964 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
2965 .ct_owner = THIS_MODULE,
2966 };
2967
2968 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2969
2970 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
2971
2972 static struct config_group *target_core_alua_create_tg_pt_gp(
2973 struct config_group *group,
2974 const char *name)
2975 {
2976 struct t10_alua *alua = container_of(group, struct t10_alua,
2977 alua_tg_pt_gps_group);
2978 struct t10_alua_tg_pt_gp *tg_pt_gp;
2979 struct config_group *alua_tg_pt_gp_cg = NULL;
2980 struct config_item *alua_tg_pt_gp_ci = NULL;
2981
2982 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
2983 if (!tg_pt_gp)
2984 return NULL;
2985
2986 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2987 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
2988
2989 config_group_init_type_name(alua_tg_pt_gp_cg, name,
2990 &target_core_alua_tg_pt_gp_cit);
2991
2992 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
2993 " Group: alua/tg_pt_gps/%s\n",
2994 config_item_name(alua_tg_pt_gp_ci));
2995
2996 return alua_tg_pt_gp_cg;
2997 }
2998
2999 static void target_core_alua_drop_tg_pt_gp(
3000 struct config_group *group,
3001 struct config_item *item)
3002 {
3003 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3004 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3005
3006 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3007 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3008 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3009 /*
3010 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3011 * -> target_core_alua_tg_pt_gp_release().
3012 */
3013 config_item_put(item);
3014 }
3015
3016 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3017 .make_group = &target_core_alua_create_tg_pt_gp,
3018 .drop_item = &target_core_alua_drop_tg_pt_gp,
3019 };
3020
3021 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3022
3023 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3024
3025 /* Start functions for struct config_item_type target_core_alua_cit */
3026
3027 /*
3028 * target_core_alua_cit is a ConfigFS group that lives under
3029 * /sys/kernel/config/target/core/alua. There are default groups
3030 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3031 * target_core_alua_cit in target_core_init_configfs() below.
3032 */
3033 static struct config_item_type target_core_alua_cit = {
3034 .ct_item_ops = NULL,
3035 .ct_attrs = NULL,
3036 .ct_owner = THIS_MODULE,
3037 };
3038
3039 /* End functions for struct config_item_type target_core_alua_cit */
3040
3041 /* Start functions for struct config_item_type tb_dev_stat_cit */
3042
3043 static struct config_group *target_core_stat_mkdir(
3044 struct config_group *group,
3045 const char *name)
3046 {
3047 return ERR_PTR(-ENOSYS);
3048 }
3049
3050 static void target_core_stat_rmdir(
3051 struct config_group *group,
3052 struct config_item *item)
3053 {
3054 return;
3055 }
3056
3057 static struct configfs_group_operations target_core_stat_group_ops = {
3058 .make_group = &target_core_stat_mkdir,
3059 .drop_item = &target_core_stat_rmdir,
3060 };
3061
3062 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3063
3064 /* End functions for struct config_item_type tb_dev_stat_cit */
3065
3066 /* Start functions for struct config_item_type target_core_hba_cit */
3067
3068 static struct config_group *target_core_make_subdev(
3069 struct config_group *group,
3070 const char *name)
3071 {
3072 struct t10_alua_tg_pt_gp *tg_pt_gp;
3073 struct config_item *hba_ci = &group->cg_item;
3074 struct se_hba *hba = item_to_hba(hba_ci);
3075 struct target_backend *tb = hba->backend;
3076 struct se_device *dev;
3077 struct config_group *dev_cg = NULL, *tg_pt_gp_cg = NULL;
3078 struct config_group *dev_stat_grp = NULL;
3079 int errno = -ENOMEM, ret;
3080
3081 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3082 if (ret)
3083 return ERR_PTR(ret);
3084
3085 dev = target_alloc_device(hba, name);
3086 if (!dev)
3087 goto out_unlock;
3088
3089 dev_cg = &dev->dev_group;
3090
3091 dev_cg->default_groups = kmalloc(sizeof(struct config_group *) * 6,
3092 GFP_KERNEL);
3093 if (!dev_cg->default_groups)
3094 goto out_free_device;
3095
3096 config_group_init_type_name(dev_cg, name, &tb->tb_dev_cit);
3097 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3098 &tb->tb_dev_attrib_cit);
3099 config_group_init_type_name(&dev->dev_pr_group, "pr",
3100 &tb->tb_dev_pr_cit);
3101 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3102 &tb->tb_dev_wwn_cit);
3103 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3104 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3105 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3106 "statistics", &tb->tb_dev_stat_cit);
3107
3108 dev_cg->default_groups[0] = &dev->dev_attrib.da_group;
3109 dev_cg->default_groups[1] = &dev->dev_pr_group;
3110 dev_cg->default_groups[2] = &dev->t10_wwn.t10_wwn_group;
3111 dev_cg->default_groups[3] = &dev->t10_alua.alua_tg_pt_gps_group;
3112 dev_cg->default_groups[4] = &dev->dev_stat_grps.stat_group;
3113 dev_cg->default_groups[5] = NULL;
3114 /*
3115 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3116 */
3117 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3118 if (!tg_pt_gp)
3119 goto out_free_dev_cg_default_groups;
3120 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3121
3122 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3123 tg_pt_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3124 GFP_KERNEL);
3125 if (!tg_pt_gp_cg->default_groups) {
3126 pr_err("Unable to allocate tg_pt_gp_cg->"
3127 "default_groups\n");
3128 goto out_free_tg_pt_gp;
3129 }
3130
3131 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3132 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3133 tg_pt_gp_cg->default_groups[0] = &tg_pt_gp->tg_pt_gp_group;
3134 tg_pt_gp_cg->default_groups[1] = NULL;
3135 /*
3136 * Add core/$HBA/$DEV/statistics/ default groups
3137 */
3138 dev_stat_grp = &dev->dev_stat_grps.stat_group;
3139 dev_stat_grp->default_groups = kmalloc(sizeof(struct config_group *) * 4,
3140 GFP_KERNEL);
3141 if (!dev_stat_grp->default_groups) {
3142 pr_err("Unable to allocate dev_stat_grp->default_groups\n");
3143 goto out_free_tg_pt_gp_cg_default_groups;
3144 }
3145 target_stat_setup_dev_default_groups(dev);
3146
3147 mutex_unlock(&hba->hba_access_mutex);
3148 return dev_cg;
3149
3150 out_free_tg_pt_gp_cg_default_groups:
3151 kfree(tg_pt_gp_cg->default_groups);
3152 out_free_tg_pt_gp:
3153 core_alua_free_tg_pt_gp(tg_pt_gp);
3154 out_free_dev_cg_default_groups:
3155 kfree(dev_cg->default_groups);
3156 out_free_device:
3157 target_free_device(dev);
3158 out_unlock:
3159 mutex_unlock(&hba->hba_access_mutex);
3160 return ERR_PTR(errno);
3161 }
3162
3163 static void target_core_drop_subdev(
3164 struct config_group *group,
3165 struct config_item *item)
3166 {
3167 struct config_group *dev_cg = to_config_group(item);
3168 struct se_device *dev =
3169 container_of(dev_cg, struct se_device, dev_group);
3170 struct se_hba *hba;
3171 struct config_item *df_item;
3172 struct config_group *tg_pt_gp_cg, *dev_stat_grp;
3173 int i;
3174
3175 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3176
3177 mutex_lock(&hba->hba_access_mutex);
3178
3179 dev_stat_grp = &dev->dev_stat_grps.stat_group;
3180 for (i = 0; dev_stat_grp->default_groups[i]; i++) {
3181 df_item = &dev_stat_grp->default_groups[i]->cg_item;
3182 dev_stat_grp->default_groups[i] = NULL;
3183 config_item_put(df_item);
3184 }
3185 kfree(dev_stat_grp->default_groups);
3186
3187 tg_pt_gp_cg = &dev->t10_alua.alua_tg_pt_gps_group;
3188 for (i = 0; tg_pt_gp_cg->default_groups[i]; i++) {
3189 df_item = &tg_pt_gp_cg->default_groups[i]->cg_item;
3190 tg_pt_gp_cg->default_groups[i] = NULL;
3191 config_item_put(df_item);
3192 }
3193 kfree(tg_pt_gp_cg->default_groups);
3194 /*
3195 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3196 * directly from target_core_alua_tg_pt_gp_release().
3197 */
3198 dev->t10_alua.default_tg_pt_gp = NULL;
3199
3200 for (i = 0; dev_cg->default_groups[i]; i++) {
3201 df_item = &dev_cg->default_groups[i]->cg_item;
3202 dev_cg->default_groups[i] = NULL;
3203 config_item_put(df_item);
3204 }
3205 /*
3206 * se_dev is released from target_core_dev_item_ops->release()
3207 */
3208 config_item_put(item);
3209 mutex_unlock(&hba->hba_access_mutex);
3210 }
3211
3212 static struct configfs_group_operations target_core_hba_group_ops = {
3213 .make_group = target_core_make_subdev,
3214 .drop_item = target_core_drop_subdev,
3215 };
3216
3217 CONFIGFS_EATTR_STRUCT(target_core_hba, se_hba);
3218 #define SE_HBA_ATTR(_name, _mode) \
3219 static struct target_core_hba_attribute \
3220 target_core_hba_##_name = \
3221 __CONFIGFS_EATTR(_name, _mode, \
3222 target_core_hba_show_attr_##_name, \
3223 target_core_hba_store_attr_##_name);
3224
3225 #define SE_HBA_ATTR_RO(_name) \
3226 static struct target_core_hba_attribute \
3227 target_core_hba_##_name = \
3228 __CONFIGFS_EATTR_RO(_name, \
3229 target_core_hba_show_attr_##_name);
3230
3231 static ssize_t target_core_hba_show_attr_hba_info(
3232 struct se_hba *hba,
3233 char *page)
3234 {
3235 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3236 hba->hba_id, hba->backend->ops->name,
3237 TARGET_CORE_VERSION);
3238 }
3239
3240 SE_HBA_ATTR_RO(hba_info);
3241
3242 static ssize_t target_core_hba_show_attr_hba_mode(struct se_hba *hba,
3243 char *page)
3244 {
3245 int hba_mode = 0;
3246
3247 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3248 hba_mode = 1;
3249
3250 return sprintf(page, "%d\n", hba_mode);
3251 }
3252
3253 static ssize_t target_core_hba_store_attr_hba_mode(struct se_hba *hba,
3254 const char *page, size_t count)
3255 {
3256 unsigned long mode_flag;
3257 int ret;
3258
3259 if (hba->backend->ops->pmode_enable_hba == NULL)
3260 return -EINVAL;
3261
3262 ret = kstrtoul(page, 0, &mode_flag);
3263 if (ret < 0) {
3264 pr_err("Unable to extract hba mode flag: %d\n", ret);
3265 return ret;
3266 }
3267
3268 if (hba->dev_count) {
3269 pr_err("Unable to set hba_mode with active devices\n");
3270 return -EINVAL;
3271 }
3272
3273 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3274 if (ret < 0)
3275 return -EINVAL;
3276 if (ret > 0)
3277 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3278 else if (ret == 0)
3279 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3280
3281 return count;
3282 }
3283
3284 SE_HBA_ATTR(hba_mode, S_IRUGO | S_IWUSR);
3285
3286 CONFIGFS_EATTR_OPS(target_core_hba, se_hba, hba_group);
3287
3288 static void target_core_hba_release(struct config_item *item)
3289 {
3290 struct se_hba *hba = container_of(to_config_group(item),
3291 struct se_hba, hba_group);
3292 core_delete_hba(hba);
3293 }
3294
3295 static struct configfs_attribute *target_core_hba_attrs[] = {
3296 &target_core_hba_hba_info.attr,
3297 &target_core_hba_hba_mode.attr,
3298 NULL,
3299 };
3300
3301 static struct configfs_item_operations target_core_hba_item_ops = {
3302 .release = target_core_hba_release,
3303 .show_attribute = target_core_hba_attr_show,
3304 .store_attribute = target_core_hba_attr_store,
3305 };
3306
3307 static struct config_item_type target_core_hba_cit = {
3308 .ct_item_ops = &target_core_hba_item_ops,
3309 .ct_group_ops = &target_core_hba_group_ops,
3310 .ct_attrs = target_core_hba_attrs,
3311 .ct_owner = THIS_MODULE,
3312 };
3313
3314 static struct config_group *target_core_call_addhbatotarget(
3315 struct config_group *group,
3316 const char *name)
3317 {
3318 char *se_plugin_str, *str, *str2;
3319 struct se_hba *hba;
3320 char buf[TARGET_CORE_NAME_MAX_LEN];
3321 unsigned long plugin_dep_id = 0;
3322 int ret;
3323
3324 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3325 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3326 pr_err("Passed *name strlen(): %d exceeds"
3327 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3328 TARGET_CORE_NAME_MAX_LEN);
3329 return ERR_PTR(-ENAMETOOLONG);
3330 }
3331 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3332
3333 str = strstr(buf, "_");
3334 if (!str) {
3335 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3336 return ERR_PTR(-EINVAL);
3337 }
3338 se_plugin_str = buf;
3339 /*
3340 * Special case for subsystem plugins that have "_" in their names.
3341 * Namely rd_direct and rd_mcp..
3342 */
3343 str2 = strstr(str+1, "_");
3344 if (str2) {
3345 *str2 = '\0'; /* Terminate for *se_plugin_str */
3346 str2++; /* Skip to start of plugin dependent ID */
3347 str = str2;
3348 } else {
3349 *str = '\0'; /* Terminate for *se_plugin_str */
3350 str++; /* Skip to start of plugin dependent ID */
3351 }
3352
3353 ret = kstrtoul(str, 0, &plugin_dep_id);
3354 if (ret < 0) {
3355 pr_err("kstrtoul() returned %d for"
3356 " plugin_dep_id\n", ret);
3357 return ERR_PTR(ret);
3358 }
3359 /*
3360 * Load up TCM subsystem plugins if they have not already been loaded.
3361 */
3362 transport_subsystem_check_init();
3363
3364 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3365 if (IS_ERR(hba))
3366 return ERR_CAST(hba);
3367
3368 config_group_init_type_name(&hba->hba_group, name,
3369 &target_core_hba_cit);
3370
3371 return &hba->hba_group;
3372 }
3373
3374 static void target_core_call_delhbafromtarget(
3375 struct config_group *group,
3376 struct config_item *item)
3377 {
3378 /*
3379 * core_delete_hba() is called from target_core_hba_item_ops->release()
3380 * -> target_core_hba_release()
3381 */
3382 config_item_put(item);
3383 }
3384
3385 static struct configfs_group_operations target_core_group_ops = {
3386 .make_group = target_core_call_addhbatotarget,
3387 .drop_item = target_core_call_delhbafromtarget,
3388 };
3389
3390 static struct config_item_type target_core_cit = {
3391 .ct_item_ops = NULL,
3392 .ct_group_ops = &target_core_group_ops,
3393 .ct_attrs = NULL,
3394 .ct_owner = THIS_MODULE,
3395 };
3396
3397 /* Stop functions for struct config_item_type target_core_hba_cit */
3398
3399 void target_setup_backend_cits(struct target_backend *tb)
3400 {
3401 target_core_setup_dev_cit(tb);
3402 target_core_setup_dev_attrib_cit(tb);
3403 target_core_setup_dev_pr_cit(tb);
3404 target_core_setup_dev_wwn_cit(tb);
3405 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3406 target_core_setup_dev_stat_cit(tb);
3407 }
3408
3409 static int __init target_core_init_configfs(void)
3410 {
3411 struct config_group *target_cg, *hba_cg = NULL, *alua_cg = NULL;
3412 struct config_group *lu_gp_cg = NULL;
3413 struct configfs_subsystem *subsys = &target_core_fabrics;
3414 struct t10_alua_lu_gp *lu_gp;
3415 int ret;
3416
3417 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3418 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3419 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3420
3421 config_group_init(&subsys->su_group);
3422 mutex_init(&subsys->su_mutex);
3423
3424 ret = init_se_kmem_caches();
3425 if (ret < 0)
3426 return ret;
3427 /*
3428 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3429 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3430 */
3431 target_cg = &subsys->su_group;
3432 target_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3433 GFP_KERNEL);
3434 if (!target_cg->default_groups) {
3435 pr_err("Unable to allocate target_cg->default_groups\n");
3436 ret = -ENOMEM;
3437 goto out_global;
3438 }
3439
3440 config_group_init_type_name(&target_core_hbagroup,
3441 "core", &target_core_cit);
3442 target_cg->default_groups[0] = &target_core_hbagroup;
3443 target_cg->default_groups[1] = NULL;
3444 /*
3445 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3446 */
3447 hba_cg = &target_core_hbagroup;
3448 hba_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3449 GFP_KERNEL);
3450 if (!hba_cg->default_groups) {
3451 pr_err("Unable to allocate hba_cg->default_groups\n");
3452 ret = -ENOMEM;
3453 goto out_global;
3454 }
3455 config_group_init_type_name(&alua_group,
3456 "alua", &target_core_alua_cit);
3457 hba_cg->default_groups[0] = &alua_group;
3458 hba_cg->default_groups[1] = NULL;
3459 /*
3460 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3461 * groups under /sys/kernel/config/target/core/alua/
3462 */
3463 alua_cg = &alua_group;
3464 alua_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3465 GFP_KERNEL);
3466 if (!alua_cg->default_groups) {
3467 pr_err("Unable to allocate alua_cg->default_groups\n");
3468 ret = -ENOMEM;
3469 goto out_global;
3470 }
3471
3472 config_group_init_type_name(&alua_lu_gps_group,
3473 "lu_gps", &target_core_alua_lu_gps_cit);
3474 alua_cg->default_groups[0] = &alua_lu_gps_group;
3475 alua_cg->default_groups[1] = NULL;
3476 /*
3477 * Add core/alua/lu_gps/default_lu_gp
3478 */
3479 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3480 if (IS_ERR(lu_gp)) {
3481 ret = -ENOMEM;
3482 goto out_global;
3483 }
3484
3485 lu_gp_cg = &alua_lu_gps_group;
3486 lu_gp_cg->default_groups = kmalloc(sizeof(struct config_group *) * 2,
3487 GFP_KERNEL);
3488 if (!lu_gp_cg->default_groups) {
3489 pr_err("Unable to allocate lu_gp_cg->default_groups\n");
3490 ret = -ENOMEM;
3491 goto out_global;
3492 }
3493
3494 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3495 &target_core_alua_lu_gp_cit);
3496 lu_gp_cg->default_groups[0] = &lu_gp->lu_gp_group;
3497 lu_gp_cg->default_groups[1] = NULL;
3498 default_lu_gp = lu_gp;
3499 /*
3500 * Register the target_core_mod subsystem with configfs.
3501 */
3502 ret = configfs_register_subsystem(subsys);
3503 if (ret < 0) {
3504 pr_err("Error %d while registering subsystem %s\n",
3505 ret, subsys->su_group.cg_item.ci_namebuf);
3506 goto out_global;
3507 }
3508 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3509 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3510 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3511 /*
3512 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3513 */
3514 ret = rd_module_init();
3515 if (ret < 0)
3516 goto out;
3517
3518 ret = core_dev_setup_virtual_lun0();
3519 if (ret < 0)
3520 goto out;
3521
3522 ret = target_xcopy_setup_pt();
3523 if (ret < 0)
3524 goto out;
3525
3526 return 0;
3527
3528 out:
3529 configfs_unregister_subsystem(subsys);
3530 core_dev_release_virtual_lun0();
3531 rd_module_exit();
3532 out_global:
3533 if (default_lu_gp) {
3534 core_alua_free_lu_gp(default_lu_gp);
3535 default_lu_gp = NULL;
3536 }
3537 if (lu_gp_cg)
3538 kfree(lu_gp_cg->default_groups);
3539 if (alua_cg)
3540 kfree(alua_cg->default_groups);
3541 if (hba_cg)
3542 kfree(hba_cg->default_groups);
3543 kfree(target_cg->default_groups);
3544 release_se_kmem_caches();
3545 return ret;
3546 }
3547
3548 static void __exit target_core_exit_configfs(void)
3549 {
3550 struct config_group *hba_cg, *alua_cg, *lu_gp_cg;
3551 struct config_item *item;
3552 int i;
3553
3554 lu_gp_cg = &alua_lu_gps_group;
3555 for (i = 0; lu_gp_cg->default_groups[i]; i++) {
3556 item = &lu_gp_cg->default_groups[i]->cg_item;
3557 lu_gp_cg->default_groups[i] = NULL;
3558 config_item_put(item);
3559 }
3560 kfree(lu_gp_cg->default_groups);
3561 lu_gp_cg->default_groups = NULL;
3562
3563 alua_cg = &alua_group;
3564 for (i = 0; alua_cg->default_groups[i]; i++) {
3565 item = &alua_cg->default_groups[i]->cg_item;
3566 alua_cg->default_groups[i] = NULL;
3567 config_item_put(item);
3568 }
3569 kfree(alua_cg->default_groups);
3570 alua_cg->default_groups = NULL;
3571
3572 hba_cg = &target_core_hbagroup;
3573 for (i = 0; hba_cg->default_groups[i]; i++) {
3574 item = &hba_cg->default_groups[i]->cg_item;
3575 hba_cg->default_groups[i] = NULL;
3576 config_item_put(item);
3577 }
3578 kfree(hba_cg->default_groups);
3579 hba_cg->default_groups = NULL;
3580 /*
3581 * We expect subsys->su_group.default_groups to be released
3582 * by configfs subsystem provider logic..
3583 */
3584 configfs_unregister_subsystem(&target_core_fabrics);
3585 kfree(target_core_fabrics.su_group.default_groups);
3586
3587 core_alua_free_lu_gp(default_lu_gp);
3588 default_lu_gp = NULL;
3589
3590 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3591 " Infrastructure\n");
3592
3593 core_dev_release_virtual_lun0();
3594 rd_module_exit();
3595 target_xcopy_release_pt();
3596 release_se_kmem_caches();
3597 }
3598
3599 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3600 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3601 MODULE_LICENSE("GPL");
3602
3603 module_init(target_core_init_configfs);
3604 module_exit(target_core_exit_configfs);
Linux kernel - Deliverables
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