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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / target / target_core_configfs.c
blobf0435228515505bc71effbd054443ae65d2e2c62
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*******************************************************************************
3 * Filename: target_core_configfs.c
4 *
5 * This file contains ConfigFS logic for the Generic Target Engine project.
6 *
7 * (c) Copyright 2008-2013 Datera, Inc.
8 *
9 * Nicholas A. Bellinger <nab@kernel.org>
10 *
11 * based on configfs Copyright (C) 2005 Oracle. All rights reserved.
12 *
13 ****************************************************************************/
14
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <generated/utsrelease.h>
18 #include <linux/utsname.h>
19 #include <linux/init.h>
20 #include <linux/fs.h>
21 #include <linux/namei.h>
22 #include <linux/slab.h>
23 #include <linux/types.h>
24 #include <linux/delay.h>
25 #include <linux/unistd.h>
26 #include <linux/string.h>
27 #include <linux/parser.h>
28 #include <linux/syscalls.h>
29 #include <linux/configfs.h>
30 #include <linux/spinlock.h>
31
32 #include <target/target_core_base.h>
33 #include <target/target_core_backend.h>
34 #include <target/target_core_fabric.h>
35
36 #include "target_core_internal.h"
37 #include "target_core_alua.h"
38 #include "target_core_pr.h"
39 #include "target_core_rd.h"
40 #include "target_core_xcopy.h"
41
42 #define TB_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
43 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
44 { \
45 struct config_item_type *cit = &tb->tb_##_name##_cit; \
46 \
47 cit->ct_item_ops = _item_ops; \
48 cit->ct_group_ops = _group_ops; \
49 cit->ct_attrs = _attrs; \
50 cit->ct_owner = tb->ops->owner; \
51 pr_debug("Setup generic %s\n", __stringify(_name)); \
52 }
53
54 #define TB_CIT_SETUP_DRV(_name, _item_ops, _group_ops) \
55 static void target_core_setup_##_name##_cit(struct target_backend *tb) \
56 { \
57 struct config_item_type *cit = &tb->tb_##_name##_cit; \
58 \
59 cit->ct_item_ops = _item_ops; \
60 cit->ct_group_ops = _group_ops; \
61 cit->ct_attrs = tb->ops->tb_##_name##_attrs; \
62 cit->ct_owner = tb->ops->owner; \
63 pr_debug("Setup generic %s\n", __stringify(_name)); \
64 }
65
66 extern struct t10_alua_lu_gp *default_lu_gp;
67
68 static LIST_HEAD(g_tf_list);
69 static DEFINE_MUTEX(g_tf_lock);
70
71 static struct config_group target_core_hbagroup;
72 static struct config_group alua_group;
73 static struct config_group alua_lu_gps_group;
74
75 static inline struct se_hba *
76 item_to_hba(struct config_item *item)
77 {
78 return container_of(to_config_group(item), struct se_hba, hba_group);
79 }
80
81 /*
82 * Attributes for /sys/kernel/config/target/
83 */
84 static ssize_t target_core_item_version_show(struct config_item *item,
85 char *page)
86 {
87 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
88 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
89 utsname()->sysname, utsname()->machine);
90 }
91
92 CONFIGFS_ATTR_RO(target_core_item_, version);
93
94 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
95 static char db_root_stage[DB_ROOT_LEN];
96
97 static ssize_t target_core_item_dbroot_show(struct config_item *item,
98 char *page)
99 {
100 return sprintf(page, "%s\n", db_root);
101 }
102
103 static ssize_t target_core_item_dbroot_store(struct config_item *item,
104 const char *page, size_t count)
105 {
106 ssize_t read_bytes;
107 struct file *fp;
108
109 mutex_lock(&g_tf_lock);
110 if (!list_empty(&g_tf_list)) {
111 mutex_unlock(&g_tf_lock);
112 pr_err("db_root: cannot be changed: target drivers registered");
113 return -EINVAL;
114 }
115
116 if (count > (DB_ROOT_LEN - 1)) {
117 mutex_unlock(&g_tf_lock);
118 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
119 (int)count, DB_ROOT_LEN - 1);
120 return -EINVAL;
121 }
122
123 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
124 if (!read_bytes) {
125 mutex_unlock(&g_tf_lock);
126 return -EINVAL;
127 }
128 if (db_root_stage[read_bytes - 1] == '\n')
129 db_root_stage[read_bytes - 1] = '\0';
130
131 /* validate new db root before accepting it */
132 fp = filp_open(db_root_stage, O_RDONLY, 0);
133 if (IS_ERR(fp)) {
134 mutex_unlock(&g_tf_lock);
135 pr_err("db_root: cannot open: %s\n", db_root_stage);
136 return -EINVAL;
137 }
138 if (!S_ISDIR(file_inode(fp)->i_mode)) {
139 filp_close(fp, NULL);
140 mutex_unlock(&g_tf_lock);
141 pr_err("db_root: not a directory: %s\n", db_root_stage);
142 return -EINVAL;
143 }
144 filp_close(fp, NULL);
145
146 strncpy(db_root, db_root_stage, read_bytes);
147
148 mutex_unlock(&g_tf_lock);
149
150 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
151
152 return read_bytes;
153 }
154
155 CONFIGFS_ATTR(target_core_item_, dbroot);
156
157 static struct target_fabric_configfs *target_core_get_fabric(
158 const char *name)
159 {
160 struct target_fabric_configfs *tf;
161
162 if (!name)
163 return NULL;
164
165 mutex_lock(&g_tf_lock);
166 list_for_each_entry(tf, &g_tf_list, tf_list) {
167 const char *cmp_name = tf->tf_ops->fabric_alias;
168 if (!cmp_name)
169 cmp_name = tf->tf_ops->fabric_name;
170 if (!strcmp(cmp_name, name)) {
171 atomic_inc(&tf->tf_access_cnt);
172 mutex_unlock(&g_tf_lock);
173 return tf;
174 }
175 }
176 mutex_unlock(&g_tf_lock);
177
178 return NULL;
179 }
180
181 /*
182 * Called from struct target_core_group_ops->make_group()
183 */
184 static struct config_group *target_core_register_fabric(
185 struct config_group *group,
186 const char *name)
187 {
188 struct target_fabric_configfs *tf;
189 int ret;
190
191 pr_debug("Target_Core_ConfigFS: REGISTER -> group: %p name:"
192 " %s\n", group, name);
193
194 tf = target_core_get_fabric(name);
195 if (!tf) {
196 pr_debug("target_core_register_fabric() trying autoload for %s\n",
197 name);
198
199 /*
200 * Below are some hardcoded request_module() calls to automatically
201 * local fabric modules when the following is called:
202 *
203 * mkdir -p /sys/kernel/config/target/$MODULE_NAME
204 *
205 * Note that this does not limit which TCM fabric module can be
206 * registered, but simply provids auto loading logic for modules with
207 * mkdir(2) system calls with known TCM fabric modules.
208 */
209
210 if (!strncmp(name, "iscsi", 5)) {
211 /*
212 * Automatically load the LIO Target fabric module when the
213 * following is called:
214 *
215 * mkdir -p $CONFIGFS/target/iscsi
216 */
217 ret = request_module("iscsi_target_mod");
218 if (ret < 0) {
219 pr_debug("request_module() failed for"
220 " iscsi_target_mod.ko: %d\n", ret);
221 return ERR_PTR(-EINVAL);
222 }
223 } else if (!strncmp(name, "loopback", 8)) {
224 /*
225 * Automatically load the tcm_loop fabric module when the
226 * following is called:
227 *
228 * mkdir -p $CONFIGFS/target/loopback
229 */
230 ret = request_module("tcm_loop");
231 if (ret < 0) {
232 pr_debug("request_module() failed for"
233 " tcm_loop.ko: %d\n", ret);
234 return ERR_PTR(-EINVAL);
235 }
236 }
237
238 tf = target_core_get_fabric(name);
239 }
240
241 if (!tf) {
242 pr_debug("target_core_get_fabric() failed for %s\n",
243 name);
244 return ERR_PTR(-EINVAL);
245 }
246 pr_debug("Target_Core_ConfigFS: REGISTER -> Located fabric:"
247 " %s\n", tf->tf_ops->fabric_name);
248 /*
249 * On a successful target_core_get_fabric() look, the returned
250 * struct target_fabric_configfs *tf will contain a usage reference.
251 */
252 pr_debug("Target_Core_ConfigFS: REGISTER tfc_wwn_cit -> %p\n",
253 &tf->tf_wwn_cit);
254
255 config_group_init_type_name(&tf->tf_group, name, &tf->tf_wwn_cit);
256
257 config_group_init_type_name(&tf->tf_disc_group, "discovery_auth",
258 &tf->tf_discovery_cit);
259 configfs_add_default_group(&tf->tf_disc_group, &tf->tf_group);
260
261 pr_debug("Target_Core_ConfigFS: REGISTER -> Allocated Fabric: %s\n",
262 config_item_name(&tf->tf_group.cg_item));
263 return &tf->tf_group;
264 }
265
266 /*
267 * Called from struct target_core_group_ops->drop_item()
268 */
269 static void target_core_deregister_fabric(
270 struct config_group *group,
271 struct config_item *item)
272 {
273 struct target_fabric_configfs *tf = container_of(
274 to_config_group(item), struct target_fabric_configfs, tf_group);
275
276 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Looking up %s in"
277 " tf list\n", config_item_name(item));
278
279 pr_debug("Target_Core_ConfigFS: DEREGISTER -> located fabric:"
280 " %s\n", tf->tf_ops->fabric_name);
281 atomic_dec(&tf->tf_access_cnt);
282
283 pr_debug("Target_Core_ConfigFS: DEREGISTER -> Releasing ci"
284 " %s\n", config_item_name(item));
285
286 configfs_remove_default_groups(&tf->tf_group);
287 config_item_put(item);
288 }
289
290 static struct configfs_group_operations target_core_fabric_group_ops = {
291 .make_group = &target_core_register_fabric,
292 .drop_item = &target_core_deregister_fabric,
293 };
294
295 /*
296 * All item attributes appearing in /sys/kernel/target/ appear here.
297 */
298 static struct configfs_attribute *target_core_fabric_item_attrs[] = {
299 &target_core_item_attr_version,
300 &target_core_item_attr_dbroot,
301 NULL,
302 };
303
304 /*
305 * Provides Fabrics Groups and Item Attributes for /sys/kernel/config/target/
306 */
307 static const struct config_item_type target_core_fabrics_item = {
308 .ct_group_ops = &target_core_fabric_group_ops,
309 .ct_attrs = target_core_fabric_item_attrs,
310 .ct_owner = THIS_MODULE,
311 };
312
313 static struct configfs_subsystem target_core_fabrics = {
314 .su_group = {
315 .cg_item = {
316 .ci_namebuf = "target",
317 .ci_type = &target_core_fabrics_item,
318 },
319 },
320 };
321
322 int target_depend_item(struct config_item *item)
323 {
324 return configfs_depend_item(&target_core_fabrics, item);
325 }
326 EXPORT_SYMBOL(target_depend_item);
327
328 void target_undepend_item(struct config_item *item)
329 {
330 return configfs_undepend_item(item);
331 }
332 EXPORT_SYMBOL(target_undepend_item);
333
334 /*##############################################################################
335 // Start functions called by external Target Fabrics Modules
336 //############################################################################*/
337
338 static int target_fabric_tf_ops_check(const struct target_core_fabric_ops *tfo)
339 {
340 if (tfo->fabric_alias) {
341 if (strlen(tfo->fabric_alias) >= TARGET_FABRIC_NAME_SIZE) {
342 pr_err("Passed alias: %s exceeds "
343 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_alias);
344 return -EINVAL;
345 }
346 }
347 if (!tfo->fabric_name) {
348 pr_err("Missing tfo->fabric_name\n");
349 return -EINVAL;
350 }
351 if (strlen(tfo->fabric_name) >= TARGET_FABRIC_NAME_SIZE) {
352 pr_err("Passed name: %s exceeds "
353 "TARGET_FABRIC_NAME_SIZE\n", tfo->fabric_name);
354 return -EINVAL;
355 }
356 if (!tfo->tpg_get_wwn) {
357 pr_err("Missing tfo->tpg_get_wwn()\n");
358 return -EINVAL;
359 }
360 if (!tfo->tpg_get_tag) {
361 pr_err("Missing tfo->tpg_get_tag()\n");
362 return -EINVAL;
363 }
364 if (!tfo->tpg_check_demo_mode) {
365 pr_err("Missing tfo->tpg_check_demo_mode()\n");
366 return -EINVAL;
367 }
368 if (!tfo->tpg_check_demo_mode_cache) {
369 pr_err("Missing tfo->tpg_check_demo_mode_cache()\n");
370 return -EINVAL;
371 }
372 if (!tfo->tpg_check_demo_mode_write_protect) {
373 pr_err("Missing tfo->tpg_check_demo_mode_write_protect()\n");
374 return -EINVAL;
375 }
376 if (!tfo->tpg_check_prod_mode_write_protect) {
377 pr_err("Missing tfo->tpg_check_prod_mode_write_protect()\n");
378 return -EINVAL;
379 }
380 if (!tfo->tpg_get_inst_index) {
381 pr_err("Missing tfo->tpg_get_inst_index()\n");
382 return -EINVAL;
383 }
384 if (!tfo->release_cmd) {
385 pr_err("Missing tfo->release_cmd()\n");
386 return -EINVAL;
387 }
388 if (!tfo->sess_get_index) {
389 pr_err("Missing tfo->sess_get_index()\n");
390 return -EINVAL;
391 }
392 if (!tfo->write_pending) {
393 pr_err("Missing tfo->write_pending()\n");
394 return -EINVAL;
395 }
396 if (!tfo->set_default_node_attributes) {
397 pr_err("Missing tfo->set_default_node_attributes()\n");
398 return -EINVAL;
399 }
400 if (!tfo->get_cmd_state) {
401 pr_err("Missing tfo->get_cmd_state()\n");
402 return -EINVAL;
403 }
404 if (!tfo->queue_data_in) {
405 pr_err("Missing tfo->queue_data_in()\n");
406 return -EINVAL;
407 }
408 if (!tfo->queue_status) {
409 pr_err("Missing tfo->queue_status()\n");
410 return -EINVAL;
411 }
412 if (!tfo->queue_tm_rsp) {
413 pr_err("Missing tfo->queue_tm_rsp()\n");
414 return -EINVAL;
415 }
416 if (!tfo->aborted_task) {
417 pr_err("Missing tfo->aborted_task()\n");
418 return -EINVAL;
419 }
420 if (!tfo->check_stop_free) {
421 pr_err("Missing tfo->check_stop_free()\n");
422 return -EINVAL;
423 }
424 /*
425 * We at least require tfo->fabric_make_wwn(), tfo->fabric_drop_wwn()
426 * tfo->fabric_make_tpg() and tfo->fabric_drop_tpg() in
427 * target_core_fabric_configfs.c WWN+TPG group context code.
428 */
429 if (!tfo->fabric_make_wwn) {
430 pr_err("Missing tfo->fabric_make_wwn()\n");
431 return -EINVAL;
432 }
433 if (!tfo->fabric_drop_wwn) {
434 pr_err("Missing tfo->fabric_drop_wwn()\n");
435 return -EINVAL;
436 }
437 if (!tfo->fabric_make_tpg) {
438 pr_err("Missing tfo->fabric_make_tpg()\n");
439 return -EINVAL;
440 }
441 if (!tfo->fabric_drop_tpg) {
442 pr_err("Missing tfo->fabric_drop_tpg()\n");
443 return -EINVAL;
444 }
445
446 return 0;
447 }
448
449 int target_register_template(const struct target_core_fabric_ops *fo)
450 {
451 struct target_fabric_configfs *tf;
452 int ret;
453
454 ret = target_fabric_tf_ops_check(fo);
455 if (ret)
456 return ret;
457
458 tf = kzalloc(sizeof(struct target_fabric_configfs), GFP_KERNEL);
459 if (!tf) {
460 pr_err("%s: could not allocate memory!\n", __func__);
461 return -ENOMEM;
462 }
463
464 INIT_LIST_HEAD(&tf->tf_list);
465 atomic_set(&tf->tf_access_cnt, 0);
466 tf->tf_ops = fo;
467 target_fabric_setup_cits(tf);
468
469 mutex_lock(&g_tf_lock);
470 list_add_tail(&tf->tf_list, &g_tf_list);
471 mutex_unlock(&g_tf_lock);
472
473 return 0;
474 }
475 EXPORT_SYMBOL(target_register_template);
476
477 void target_unregister_template(const struct target_core_fabric_ops *fo)
478 {
479 struct target_fabric_configfs *t;
480
481 mutex_lock(&g_tf_lock);
482 list_for_each_entry(t, &g_tf_list, tf_list) {
483 if (!strcmp(t->tf_ops->fabric_name, fo->fabric_name)) {
484 BUG_ON(atomic_read(&t->tf_access_cnt));
485 list_del(&t->tf_list);
486 mutex_unlock(&g_tf_lock);
487 /*
488 * Wait for any outstanding fabric se_deve_entry->rcu_head
489 * callbacks to complete post kfree_rcu(), before allowing
490 * fabric driver unload of TFO->module to proceed.
491 */
492 rcu_barrier();
493 kfree(t);
494 return;
495 }
496 }
497 mutex_unlock(&g_tf_lock);
498 }
499 EXPORT_SYMBOL(target_unregister_template);
500
501 /*##############################################################################
502 // Stop functions called by external Target Fabrics Modules
503 //############################################################################*/
504
505 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
506 {
507 return container_of(to_config_group(item), struct se_dev_attrib,
508 da_group);
509 }
510
511 /* Start functions for struct config_item_type tb_dev_attrib_cit */
512 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
513 static ssize_t _name##_show(struct config_item *item, char *page) \
514 { \
515 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
516 }
517
518 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
530 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
531 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
532 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
533 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
534 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
535 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
536 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
537 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
538 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
539 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
540 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
541 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
542 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
543 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
545 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
548 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
549
550 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
551 static ssize_t _name##_store(struct config_item *item, const char *page,\
552 size_t count) \
553 { \
554 struct se_dev_attrib *da = to_attrib(item); \
555 u32 val; \
556 int ret; \
557 \
558 ret = kstrtou32(page, 0, &val); \
559 if (ret < 0) \
560 return ret; \
561 da->_name = val; \
562 return count; \
563 }
564
565 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
570
571 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
572 static ssize_t _name##_store(struct config_item *item, const char *page, \
573 size_t count) \
574 { \
575 struct se_dev_attrib *da = to_attrib(item); \
576 bool flag; \
577 int ret; \
578 \
579 ret = strtobool(page, &flag); \
580 if (ret < 0) \
581 return ret; \
582 da->_name = flag; \
583 return count; \
584 }
585
586 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
592
593 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
594 static ssize_t _name##_store(struct config_item *item, const char *page,\
595 size_t count) \
596 { \
597 printk_once(KERN_WARNING \
598 "ignoring deprecated %s attribute\n", \
599 __stringify(_name)); \
600 return count; \
601 }
602
603 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
605
606 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
607 {
608 const char *configname;
609
610 configname = config_item_name(&dev->dev_group.cg_item);
611 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
612 pr_warn("dev[%p]: Backstore name '%s' is too long for "
613 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
614 configname);
615 }
616 /*
617 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
618 * here without potentially breaking existing setups, so continue to
619 * truncate one byte shorter than what can be carried in INQUIRY.
620 */
621 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
622 }
623
624 static ssize_t emulate_model_alias_store(struct config_item *item,
625 const char *page, size_t count)
626 {
627 struct se_dev_attrib *da = to_attrib(item);
628 struct se_device *dev = da->da_dev;
629 bool flag;
630 int ret;
631
632 if (dev->export_count) {
633 pr_err("dev[%p]: Unable to change model alias"
634 " while export_count is %d\n",
635 dev, dev->export_count);
636 return -EINVAL;
637 }
638
639 ret = strtobool(page, &flag);
640 if (ret < 0)
641 return ret;
642
643 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
644 if (flag) {
645 dev_set_t10_wwn_model_alias(dev);
646 } else {
647 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
648 sizeof(dev->t10_wwn.model));
649 }
650 da->emulate_model_alias = flag;
651 return count;
652 }
653
654 static ssize_t emulate_write_cache_store(struct config_item *item,
655 const char *page, size_t count)
656 {
657 struct se_dev_attrib *da = to_attrib(item);
658 bool flag;
659 int ret;
660
661 ret = strtobool(page, &flag);
662 if (ret < 0)
663 return ret;
664
665 if (flag && da->da_dev->transport->get_write_cache) {
666 pr_err("emulate_write_cache not supported for this device\n");
667 return -EINVAL;
668 }
669
670 da->emulate_write_cache = flag;
671 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
672 da->da_dev, flag);
673 return count;
674 }
675
676 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
677 const char *page, size_t count)
678 {
679 struct se_dev_attrib *da = to_attrib(item);
680 u32 val;
681 int ret;
682
683 ret = kstrtou32(page, 0, &val);
684 if (ret < 0)
685 return ret;
686
687 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
688 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
689 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
690 pr_err("Illegal value %d\n", val);
691 return -EINVAL;
692 }
693
694 if (da->da_dev->export_count) {
695 pr_err("dev[%p]: Unable to change SE Device"
696 " UA_INTRLCK_CTRL while export_count is %d\n",
697 da->da_dev, da->da_dev->export_count);
698 return -EINVAL;
699 }
700 da->emulate_ua_intlck_ctrl = val;
701 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
702 da->da_dev, val);
703 return count;
704 }
705
706 static ssize_t emulate_tas_store(struct config_item *item,
707 const char *page, size_t count)
708 {
709 struct se_dev_attrib *da = to_attrib(item);
710 bool flag;
711 int ret;
712
713 ret = strtobool(page, &flag);
714 if (ret < 0)
715 return ret;
716
717 if (da->da_dev->export_count) {
718 pr_err("dev[%p]: Unable to change SE Device TAS while"
719 " export_count is %d\n",
720 da->da_dev, da->da_dev->export_count);
721 return -EINVAL;
722 }
723 da->emulate_tas = flag;
724 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
725 da->da_dev, flag ? "Enabled" : "Disabled");
726
727 return count;
728 }
729
730 static ssize_t emulate_tpu_store(struct config_item *item,
731 const char *page, size_t count)
732 {
733 struct se_dev_attrib *da = to_attrib(item);
734 bool flag;
735 int ret;
736
737 ret = strtobool(page, &flag);
738 if (ret < 0)
739 return ret;
740
741 /*
742 * We expect this value to be non-zero when generic Block Layer
743 * Discard supported is detected iblock_create_virtdevice().
744 */
745 if (flag && !da->max_unmap_block_desc_count) {
746 pr_err("Generic Block Discard not supported\n");
747 return -ENOSYS;
748 }
749
750 da->emulate_tpu = flag;
751 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
752 da->da_dev, flag);
753 return count;
754 }
755
756 static ssize_t emulate_tpws_store(struct config_item *item,
757 const char *page, size_t count)
758 {
759 struct se_dev_attrib *da = to_attrib(item);
760 bool flag;
761 int ret;
762
763 ret = strtobool(page, &flag);
764 if (ret < 0)
765 return ret;
766
767 /*
768 * We expect this value to be non-zero when generic Block Layer
769 * Discard supported is detected iblock_create_virtdevice().
770 */
771 if (flag && !da->max_unmap_block_desc_count) {
772 pr_err("Generic Block Discard not supported\n");
773 return -ENOSYS;
774 }
775
776 da->emulate_tpws = flag;
777 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
778 da->da_dev, flag);
779 return count;
780 }
781
782 static ssize_t pi_prot_type_store(struct config_item *item,
783 const char *page, size_t count)
784 {
785 struct se_dev_attrib *da = to_attrib(item);
786 int old_prot = da->pi_prot_type, ret;
787 struct se_device *dev = da->da_dev;
788 u32 flag;
789
790 ret = kstrtou32(page, 0, &flag);
791 if (ret < 0)
792 return ret;
793
794 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
795 pr_err("Illegal value %d for pi_prot_type\n", flag);
796 return -EINVAL;
797 }
798 if (flag == 2) {
799 pr_err("DIF TYPE2 protection currently not supported\n");
800 return -ENOSYS;
801 }
802 if (da->hw_pi_prot_type) {
803 pr_warn("DIF protection enabled on underlying hardware,"
804 " ignoring\n");
805 return count;
806 }
807 if (!dev->transport->init_prot || !dev->transport->free_prot) {
808 /* 0 is only allowed value for non-supporting backends */
809 if (flag == 0)
810 return count;
811
812 pr_err("DIF protection not supported by backend: %s\n",
813 dev->transport->name);
814 return -ENOSYS;
815 }
816 if (!target_dev_configured(dev)) {
817 pr_err("DIF protection requires device to be configured\n");
818 return -ENODEV;
819 }
820 if (dev->export_count) {
821 pr_err("dev[%p]: Unable to change SE Device PROT type while"
822 " export_count is %d\n", dev, dev->export_count);
823 return -EINVAL;
824 }
825
826 da->pi_prot_type = flag;
827
828 if (flag && !old_prot) {
829 ret = dev->transport->init_prot(dev);
830 if (ret) {
831 da->pi_prot_type = old_prot;
832 da->pi_prot_verify = (bool) da->pi_prot_type;
833 return ret;
834 }
835
836 } else if (!flag && old_prot) {
837 dev->transport->free_prot(dev);
838 }
839
840 da->pi_prot_verify = (bool) da->pi_prot_type;
841 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
842 return count;
843 }
844
845 /* always zero, but attr needs to remain RW to avoid userspace breakage */
846 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
847 {
848 return snprintf(page, PAGE_SIZE, "0\n");
849 }
850
851 static ssize_t pi_prot_format_store(struct config_item *item,
852 const char *page, size_t count)
853 {
854 struct se_dev_attrib *da = to_attrib(item);
855 struct se_device *dev = da->da_dev;
856 bool flag;
857 int ret;
858
859 ret = strtobool(page, &flag);
860 if (ret < 0)
861 return ret;
862
863 if (!flag)
864 return count;
865
866 if (!dev->transport->format_prot) {
867 pr_err("DIF protection format not supported by backend %s\n",
868 dev->transport->name);
869 return -ENOSYS;
870 }
871 if (!target_dev_configured(dev)) {
872 pr_err("DIF protection format requires device to be configured\n");
873 return -ENODEV;
874 }
875 if (dev->export_count) {
876 pr_err("dev[%p]: Unable to format SE Device PROT type while"
877 " export_count is %d\n", dev, dev->export_count);
878 return -EINVAL;
879 }
880
881 ret = dev->transport->format_prot(dev);
882 if (ret)
883 return ret;
884
885 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
886 return count;
887 }
888
889 static ssize_t pi_prot_verify_store(struct config_item *item,
890 const char *page, size_t count)
891 {
892 struct se_dev_attrib *da = to_attrib(item);
893 bool flag;
894 int ret;
895
896 ret = strtobool(page, &flag);
897 if (ret < 0)
898 return ret;
899
900 if (!flag) {
901 da->pi_prot_verify = flag;
902 return count;
903 }
904 if (da->hw_pi_prot_type) {
905 pr_warn("DIF protection enabled on underlying hardware,"
906 " ignoring\n");
907 return count;
908 }
909 if (!da->pi_prot_type) {
910 pr_warn("DIF protection not supported by backend, ignoring\n");
911 return count;
912 }
913 da->pi_prot_verify = flag;
914
915 return count;
916 }
917
918 static ssize_t force_pr_aptpl_store(struct config_item *item,
919 const char *page, size_t count)
920 {
921 struct se_dev_attrib *da = to_attrib(item);
922 bool flag;
923 int ret;
924
925 ret = strtobool(page, &flag);
926 if (ret < 0)
927 return ret;
928 if (da->da_dev->export_count) {
929 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
930 " export_count is %d\n",
931 da->da_dev, da->da_dev->export_count);
932 return -EINVAL;
933 }
934
935 da->force_pr_aptpl = flag;
936 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
937 return count;
938 }
939
940 static ssize_t emulate_rest_reord_store(struct config_item *item,
941 const char *page, size_t count)
942 {
943 struct se_dev_attrib *da = to_attrib(item);
944 bool flag;
945 int ret;
946
947 ret = strtobool(page, &flag);
948 if (ret < 0)
949 return ret;
950
951 if (flag != 0) {
952 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
953 " reordering not implemented\n", da->da_dev);
954 return -ENOSYS;
955 }
956 da->emulate_rest_reord = flag;
957 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
958 da->da_dev, flag);
959 return count;
960 }
961
962 static ssize_t unmap_zeroes_data_store(struct config_item *item,
963 const char *page, size_t count)
964 {
965 struct se_dev_attrib *da = to_attrib(item);
966 bool flag;
967 int ret;
968
969 ret = strtobool(page, &flag);
970 if (ret < 0)
971 return ret;
972
973 if (da->da_dev->export_count) {
974 pr_err("dev[%p]: Unable to change SE Device"
975 " unmap_zeroes_data while export_count is %d\n",
976 da->da_dev, da->da_dev->export_count);
977 return -EINVAL;
978 }
979 /*
980 * We expect this value to be non-zero when generic Block Layer
981 * Discard supported is detected iblock_configure_device().
982 */
983 if (flag && !da->max_unmap_block_desc_count) {
984 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set"
985 " because max_unmap_block_desc_count is zero\n",
986 da->da_dev);
987 return -ENOSYS;
988 }
989 da->unmap_zeroes_data = flag;
990 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
991 da->da_dev, flag);
992 return count;
993 }
994
995 /*
996 * Note, this can only be called on unexported SE Device Object.
997 */
998 static ssize_t queue_depth_store(struct config_item *item,
999 const char *page, size_t count)
1000 {
1001 struct se_dev_attrib *da = to_attrib(item);
1002 struct se_device *dev = da->da_dev;
1003 u32 val;
1004 int ret;
1005
1006 ret = kstrtou32(page, 0, &val);
1007 if (ret < 0)
1008 return ret;
1009
1010 if (dev->export_count) {
1011 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1012 " export_count is %d\n",
1013 dev, dev->export_count);
1014 return -EINVAL;
1015 }
1016 if (!val) {
1017 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1018 return -EINVAL;
1019 }
1020
1021 if (val > dev->dev_attrib.queue_depth) {
1022 if (val > dev->dev_attrib.hw_queue_depth) {
1023 pr_err("dev[%p]: Passed queue_depth:"
1024 " %u exceeds TCM/SE_Device MAX"
1025 " TCQ: %u\n", dev, val,
1026 dev->dev_attrib.hw_queue_depth);
1027 return -EINVAL;
1028 }
1029 }
1030 da->queue_depth = dev->queue_depth = val;
1031 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1032 return count;
1033 }
1034
1035 static ssize_t optimal_sectors_store(struct config_item *item,
1036 const char *page, size_t count)
1037 {
1038 struct se_dev_attrib *da = to_attrib(item);
1039 u32 val;
1040 int ret;
1041
1042 ret = kstrtou32(page, 0, &val);
1043 if (ret < 0)
1044 return ret;
1045
1046 if (da->da_dev->export_count) {
1047 pr_err("dev[%p]: Unable to change SE Device"
1048 " optimal_sectors while export_count is %d\n",
1049 da->da_dev, da->da_dev->export_count);
1050 return -EINVAL;
1051 }
1052 if (val > da->hw_max_sectors) {
1053 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1054 " greater than hw_max_sectors: %u\n",
1055 da->da_dev, val, da->hw_max_sectors);
1056 return -EINVAL;
1057 }
1058
1059 da->optimal_sectors = val;
1060 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1061 da->da_dev, val);
1062 return count;
1063 }
1064
1065 static ssize_t block_size_store(struct config_item *item,
1066 const char *page, size_t count)
1067 {
1068 struct se_dev_attrib *da = to_attrib(item);
1069 u32 val;
1070 int ret;
1071
1072 ret = kstrtou32(page, 0, &val);
1073 if (ret < 0)
1074 return ret;
1075
1076 if (da->da_dev->export_count) {
1077 pr_err("dev[%p]: Unable to change SE Device block_size"
1078 " while export_count is %d\n",
1079 da->da_dev, da->da_dev->export_count);
1080 return -EINVAL;
1081 }
1082
1083 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1084 pr_err("dev[%p]: Illegal value for block_device: %u"
1085 " for SE device, must be 512, 1024, 2048 or 4096\n",
1086 da->da_dev, val);
1087 return -EINVAL;
1088 }
1089
1090 da->block_size = val;
1091 if (da->max_bytes_per_io)
1092 da->hw_max_sectors = da->max_bytes_per_io / val;
1093
1094 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1095 da->da_dev, val);
1096 return count;
1097 }
1098
1099 static ssize_t alua_support_show(struct config_item *item, char *page)
1100 {
1101 struct se_dev_attrib *da = to_attrib(item);
1102 u8 flags = da->da_dev->transport_flags;
1103
1104 return snprintf(page, PAGE_SIZE, "%d\n",
1105 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1106 }
1107
1108 static ssize_t alua_support_store(struct config_item *item,
1109 const char *page, size_t count)
1110 {
1111 struct se_dev_attrib *da = to_attrib(item);
1112 struct se_device *dev = da->da_dev;
1113 bool flag;
1114 int ret;
1115
1116 if (!(dev->transport->transport_flags_changeable &
1117 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1118 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1119 " alua_support has fixed value\n", dev);
1120 return -EINVAL;
1121 }
1122
1123 ret = strtobool(page, &flag);
1124 if (ret < 0)
1125 return ret;
1126
1127 if (flag)
1128 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1129 else
1130 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1131 return count;
1132 }
1133
1134 static ssize_t pgr_support_show(struct config_item *item, char *page)
1135 {
1136 struct se_dev_attrib *da = to_attrib(item);
1137 u8 flags = da->da_dev->transport_flags;
1138
1139 return snprintf(page, PAGE_SIZE, "%d\n",
1140 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1141 }
1142
1143 static ssize_t pgr_support_store(struct config_item *item,
1144 const char *page, size_t count)
1145 {
1146 struct se_dev_attrib *da = to_attrib(item);
1147 struct se_device *dev = da->da_dev;
1148 bool flag;
1149 int ret;
1150
1151 if (!(dev->transport->transport_flags_changeable &
1152 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1153 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1154 " pgr_support has fixed value\n", dev);
1155 return -EINVAL;
1156 }
1157
1158 ret = strtobool(page, &flag);
1159 if (ret < 0)
1160 return ret;
1161
1162 if (flag)
1163 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1164 else
1165 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1166 return count;
1167 }
1168
1169 CONFIGFS_ATTR(, emulate_model_alias);
1170 CONFIGFS_ATTR(, emulate_dpo);
1171 CONFIGFS_ATTR(, emulate_fua_write);
1172 CONFIGFS_ATTR(, emulate_fua_read);
1173 CONFIGFS_ATTR(, emulate_write_cache);
1174 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1175 CONFIGFS_ATTR(, emulate_tas);
1176 CONFIGFS_ATTR(, emulate_tpu);
1177 CONFIGFS_ATTR(, emulate_tpws);
1178 CONFIGFS_ATTR(, emulate_caw);
1179 CONFIGFS_ATTR(, emulate_3pc);
1180 CONFIGFS_ATTR(, emulate_pr);
1181 CONFIGFS_ATTR(, pi_prot_type);
1182 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1183 CONFIGFS_ATTR(, pi_prot_format);
1184 CONFIGFS_ATTR(, pi_prot_verify);
1185 CONFIGFS_ATTR(, enforce_pr_isids);
1186 CONFIGFS_ATTR(, is_nonrot);
1187 CONFIGFS_ATTR(, emulate_rest_reord);
1188 CONFIGFS_ATTR(, force_pr_aptpl);
1189 CONFIGFS_ATTR_RO(, hw_block_size);
1190 CONFIGFS_ATTR(, block_size);
1191 CONFIGFS_ATTR_RO(, hw_max_sectors);
1192 CONFIGFS_ATTR(, optimal_sectors);
1193 CONFIGFS_ATTR_RO(, hw_queue_depth);
1194 CONFIGFS_ATTR(, queue_depth);
1195 CONFIGFS_ATTR(, max_unmap_lba_count);
1196 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1197 CONFIGFS_ATTR(, unmap_granularity);
1198 CONFIGFS_ATTR(, unmap_granularity_alignment);
1199 CONFIGFS_ATTR(, unmap_zeroes_data);
1200 CONFIGFS_ATTR(, max_write_same_len);
1201 CONFIGFS_ATTR(, alua_support);
1202 CONFIGFS_ATTR(, pgr_support);
1203
1204 /*
1205 * dev_attrib attributes for devices using the target core SBC/SPC
1206 * interpreter. Any backend using spc_parse_cdb should be using
1207 * these.
1208 */
1209 struct configfs_attribute *sbc_attrib_attrs[] = {
1210 &attr_emulate_model_alias,
1211 &attr_emulate_dpo,
1212 &attr_emulate_fua_write,
1213 &attr_emulate_fua_read,
1214 &attr_emulate_write_cache,
1215 &attr_emulate_ua_intlck_ctrl,
1216 &attr_emulate_tas,
1217 &attr_emulate_tpu,
1218 &attr_emulate_tpws,
1219 &attr_emulate_caw,
1220 &attr_emulate_3pc,
1221 &attr_emulate_pr,
1222 &attr_pi_prot_type,
1223 &attr_hw_pi_prot_type,
1224 &attr_pi_prot_format,
1225 &attr_pi_prot_verify,
1226 &attr_enforce_pr_isids,
1227 &attr_is_nonrot,
1228 &attr_emulate_rest_reord,
1229 &attr_force_pr_aptpl,
1230 &attr_hw_block_size,
1231 &attr_block_size,
1232 &attr_hw_max_sectors,
1233 &attr_optimal_sectors,
1234 &attr_hw_queue_depth,
1235 &attr_queue_depth,
1236 &attr_max_unmap_lba_count,
1237 &attr_max_unmap_block_desc_count,
1238 &attr_unmap_granularity,
1239 &attr_unmap_granularity_alignment,
1240 &attr_unmap_zeroes_data,
1241 &attr_max_write_same_len,
1242 &attr_alua_support,
1243 &attr_pgr_support,
1244 NULL,
1245 };
1246 EXPORT_SYMBOL(sbc_attrib_attrs);
1247
1248 /*
1249 * Minimal dev_attrib attributes for devices passing through CDBs.
1250 * In this case we only provide a few read-only attributes for
1251 * backwards compatibility.
1252 */
1253 struct configfs_attribute *passthrough_attrib_attrs[] = {
1254 &attr_hw_pi_prot_type,
1255 &attr_hw_block_size,
1256 &attr_hw_max_sectors,
1257 &attr_hw_queue_depth,
1258 &attr_emulate_pr,
1259 &attr_alua_support,
1260 &attr_pgr_support,
1261 NULL,
1262 };
1263 EXPORT_SYMBOL(passthrough_attrib_attrs);
1264
1265 /*
1266 * pr related dev_attrib attributes for devices passing through CDBs,
1267 * but allowing in core pr emulation.
1268 */
1269 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1270 &attr_enforce_pr_isids,
1271 &attr_force_pr_aptpl,
1272 NULL,
1273 };
1274 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1275
1276 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1277 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1278
1279 /* End functions for struct config_item_type tb_dev_attrib_cit */
1280
1281 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1282
1283 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1284 {
1285 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1286 }
1287
1288 static ssize_t target_check_inquiry_data(char *buf)
1289 {
1290 size_t len;
1291 int i;
1292
1293 len = strlen(buf);
1294
1295 /*
1296 * SPC 4.3.1:
1297 * ASCII data fields shall contain only ASCII printable characters
1298 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1299 * more ASCII null (00h) characters.
1300 */
1301 for (i = 0; i < len; i++) {
1302 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1303 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1304 return -EINVAL;
1305 }
1306 }
1307
1308 return len;
1309 }
1310
1311 /*
1312 * STANDARD and VPD page 0x83 T10 Vendor Identification
1313 */
1314 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1315 char *page)
1316 {
1317 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1318 }
1319
1320 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1321 const char *page, size_t count)
1322 {
1323 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1324 struct se_device *dev = t10_wwn->t10_dev;
1325 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1326 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1327 char *stripped = NULL;
1328 size_t len;
1329 ssize_t ret;
1330
1331 len = strlcpy(buf, page, sizeof(buf));
1332 if (len < sizeof(buf)) {
1333 /* Strip any newline added from userspace. */
1334 stripped = strstrip(buf);
1335 len = strlen(stripped);
1336 }
1337 if (len > INQUIRY_VENDOR_LEN) {
1338 pr_err("Emulated T10 Vendor Identification exceeds"
1339 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1340 "\n");
1341 return -EOVERFLOW;
1342 }
1343
1344 ret = target_check_inquiry_data(stripped);
1345
1346 if (ret < 0)
1347 return ret;
1348
1349 /*
1350 * Check to see if any active exports exist. If they do exist, fail
1351 * here as changing this information on the fly (underneath the
1352 * initiator side OS dependent multipath code) could cause negative
1353 * effects.
1354 */
1355 if (dev->export_count) {
1356 pr_err("Unable to set T10 Vendor Identification while"
1357 " active %d exports exist\n", dev->export_count);
1358 return -EINVAL;
1359 }
1360
1361 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1362 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1363
1364 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1365 " %s\n", dev->t10_wwn.vendor);
1366
1367 return count;
1368 }
1369
1370 static ssize_t target_wwn_product_id_show(struct config_item *item,
1371 char *page)
1372 {
1373 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1374 }
1375
1376 static ssize_t target_wwn_product_id_store(struct config_item *item,
1377 const char *page, size_t count)
1378 {
1379 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1380 struct se_device *dev = t10_wwn->t10_dev;
1381 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1382 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1383 char *stripped = NULL;
1384 size_t len;
1385 ssize_t ret;
1386
1387 len = strlcpy(buf, page, sizeof(buf));
1388 if (len < sizeof(buf)) {
1389 /* Strip any newline added from userspace. */
1390 stripped = strstrip(buf);
1391 len = strlen(stripped);
1392 }
1393 if (len > INQUIRY_MODEL_LEN) {
1394 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1395 __stringify(INQUIRY_MODEL_LEN)
1396 "\n");
1397 return -EOVERFLOW;
1398 }
1399
1400 ret = target_check_inquiry_data(stripped);
1401
1402 if (ret < 0)
1403 return ret;
1404
1405 /*
1406 * Check to see if any active exports exist. If they do exist, fail
1407 * here as changing this information on the fly (underneath the
1408 * initiator side OS dependent multipath code) could cause negative
1409 * effects.
1410 */
1411 if (dev->export_count) {
1412 pr_err("Unable to set T10 Model while active %d exports exist\n",
1413 dev->export_count);
1414 return -EINVAL;
1415 }
1416
1417 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1418 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1419
1420 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1421 dev->t10_wwn.model);
1422
1423 return count;
1424 }
1425
1426 static ssize_t target_wwn_revision_show(struct config_item *item,
1427 char *page)
1428 {
1429 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1430 }
1431
1432 static ssize_t target_wwn_revision_store(struct config_item *item,
1433 const char *page, size_t count)
1434 {
1435 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1436 struct se_device *dev = t10_wwn->t10_dev;
1437 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1438 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1439 char *stripped = NULL;
1440 size_t len;
1441 ssize_t ret;
1442
1443 len = strlcpy(buf, page, sizeof(buf));
1444 if (len < sizeof(buf)) {
1445 /* Strip any newline added from userspace. */
1446 stripped = strstrip(buf);
1447 len = strlen(stripped);
1448 }
1449 if (len > INQUIRY_REVISION_LEN) {
1450 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1451 __stringify(INQUIRY_REVISION_LEN)
1452 "\n");
1453 return -EOVERFLOW;
1454 }
1455
1456 ret = target_check_inquiry_data(stripped);
1457
1458 if (ret < 0)
1459 return ret;
1460
1461 /*
1462 * Check to see if any active exports exist. If they do exist, fail
1463 * here as changing this information on the fly (underneath the
1464 * initiator side OS dependent multipath code) could cause negative
1465 * effects.
1466 */
1467 if (dev->export_count) {
1468 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1469 dev->export_count);
1470 return -EINVAL;
1471 }
1472
1473 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1474 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1475
1476 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1477 dev->t10_wwn.revision);
1478
1479 return count;
1480 }
1481
1482 /*
1483 * VPD page 0x80 Unit serial
1484 */
1485 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1486 char *page)
1487 {
1488 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1489 &to_t10_wwn(item)->unit_serial[0]);
1490 }
1491
1492 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1493 const char *page, size_t count)
1494 {
1495 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1496 struct se_device *dev = t10_wwn->t10_dev;
1497 unsigned char buf[INQUIRY_VPD_SERIAL_LEN];
1498
1499 /*
1500 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1501 * from the struct scsi_device level firmware, do not allow
1502 * VPD Unit Serial to be emulated.
1503 *
1504 * Note this struct scsi_device could also be emulating VPD
1505 * information from its drivers/scsi LLD. But for now we assume
1506 * it is doing 'the right thing' wrt a world wide unique
1507 * VPD Unit Serial Number that OS dependent multipath can depend on.
1508 */
1509 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1510 pr_err("Underlying SCSI device firmware provided VPD"
1511 " Unit Serial, ignoring request\n");
1512 return -EOPNOTSUPP;
1513 }
1514
1515 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1516 pr_err("Emulated VPD Unit Serial exceeds"
1517 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1518 return -EOVERFLOW;
1519 }
1520 /*
1521 * Check to see if any active $FABRIC_MOD exports exist. If they
1522 * do exist, fail here as changing this information on the fly
1523 * (underneath the initiator side OS dependent multipath code)
1524 * could cause negative effects.
1525 */
1526 if (dev->export_count) {
1527 pr_err("Unable to set VPD Unit Serial while"
1528 " active %d $FABRIC_MOD exports exist\n",
1529 dev->export_count);
1530 return -EINVAL;
1531 }
1532
1533 /*
1534 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1535 *
1536 * Also, strip any newline added from the userspace
1537 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1538 */
1539 memset(buf, 0, INQUIRY_VPD_SERIAL_LEN);
1540 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1541 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1542 "%s", strstrip(buf));
1543 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1544
1545 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1546 " %s\n", dev->t10_wwn.unit_serial);
1547
1548 return count;
1549 }
1550
1551 /*
1552 * VPD page 0x83 Protocol Identifier
1553 */
1554 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1555 char *page)
1556 {
1557 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1558 struct t10_vpd *vpd;
1559 unsigned char buf[VPD_TMP_BUF_SIZE];
1560 ssize_t len = 0;
1561
1562 memset(buf, 0, VPD_TMP_BUF_SIZE);
1563
1564 spin_lock(&t10_wwn->t10_vpd_lock);
1565 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1566 if (!vpd->protocol_identifier_set)
1567 continue;
1568
1569 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1570
1571 if (len + strlen(buf) >= PAGE_SIZE)
1572 break;
1573
1574 len += sprintf(page+len, "%s", buf);
1575 }
1576 spin_unlock(&t10_wwn->t10_vpd_lock);
1577
1578 return len;
1579 }
1580
1581 /*
1582 * Generic wrapper for dumping VPD identifiers by association.
1583 */
1584 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1585 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1586 char *page) \
1587 { \
1588 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1589 struct t10_vpd *vpd; \
1590 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1591 ssize_t len = 0; \
1592 \
1593 spin_lock(&t10_wwn->t10_vpd_lock); \
1594 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1595 if (vpd->association != _assoc) \
1596 continue; \
1597 \
1598 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1599 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1600 if (len + strlen(buf) >= PAGE_SIZE) \
1601 break; \
1602 len += sprintf(page+len, "%s", buf); \
1603 \
1604 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1605 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1606 if (len + strlen(buf) >= PAGE_SIZE) \
1607 break; \
1608 len += sprintf(page+len, "%s", buf); \
1609 \
1610 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1611 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1612 if (len + strlen(buf) >= PAGE_SIZE) \
1613 break; \
1614 len += sprintf(page+len, "%s", buf); \
1615 } \
1616 spin_unlock(&t10_wwn->t10_vpd_lock); \
1617 \
1618 return len; \
1619 }
1620
1621 /* VPD page 0x83 Association: Logical Unit */
1622 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1623 /* VPD page 0x83 Association: Target Port */
1624 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1625 /* VPD page 0x83 Association: SCSI Target Device */
1626 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1627
1628 CONFIGFS_ATTR(target_wwn_, vendor_id);
1629 CONFIGFS_ATTR(target_wwn_, product_id);
1630 CONFIGFS_ATTR(target_wwn_, revision);
1631 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1632 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1633 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1634 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1635 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1636
1637 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1638 &target_wwn_attr_vendor_id,
1639 &target_wwn_attr_product_id,
1640 &target_wwn_attr_revision,
1641 &target_wwn_attr_vpd_unit_serial,
1642 &target_wwn_attr_vpd_protocol_identifier,
1643 &target_wwn_attr_vpd_assoc_logical_unit,
1644 &target_wwn_attr_vpd_assoc_target_port,
1645 &target_wwn_attr_vpd_assoc_scsi_target_device,
1646 NULL,
1647 };
1648
1649 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1650
1651 /* End functions for struct config_item_type tb_dev_wwn_cit */
1652
1653 /* Start functions for struct config_item_type tb_dev_pr_cit */
1654
1655 static struct se_device *pr_to_dev(struct config_item *item)
1656 {
1657 return container_of(to_config_group(item), struct se_device,
1658 dev_pr_group);
1659 }
1660
1661 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1662 char *page)
1663 {
1664 struct se_node_acl *se_nacl;
1665 struct t10_pr_registration *pr_reg;
1666 char i_buf[PR_REG_ISID_ID_LEN];
1667
1668 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1669
1670 pr_reg = dev->dev_pr_res_holder;
1671 if (!pr_reg)
1672 return sprintf(page, "No SPC-3 Reservation holder\n");
1673
1674 se_nacl = pr_reg->pr_reg_nacl;
1675 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1676
1677 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1678 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1679 se_nacl->initiatorname, i_buf);
1680 }
1681
1682 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1683 char *page)
1684 {
1685 struct se_session *sess = dev->reservation_holder;
1686 struct se_node_acl *se_nacl;
1687 ssize_t len;
1688
1689 if (sess) {
1690 se_nacl = sess->se_node_acl;
1691 len = sprintf(page,
1692 "SPC-2 Reservation: %s Initiator: %s\n",
1693 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1694 se_nacl->initiatorname);
1695 } else {
1696 len = sprintf(page, "No SPC-2 Reservation holder\n");
1697 }
1698 return len;
1699 }
1700
1701 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1702 {
1703 struct se_device *dev = pr_to_dev(item);
1704 int ret;
1705
1706 if (!dev->dev_attrib.emulate_pr)
1707 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1708
1709 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1710 return sprintf(page, "Passthrough\n");
1711
1712 spin_lock(&dev->dev_reservation_lock);
1713 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1714 ret = target_core_dev_pr_show_spc2_res(dev, page);
1715 else
1716 ret = target_core_dev_pr_show_spc3_res(dev, page);
1717 spin_unlock(&dev->dev_reservation_lock);
1718 return ret;
1719 }
1720
1721 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1722 char *page)
1723 {
1724 struct se_device *dev = pr_to_dev(item);
1725 ssize_t len = 0;
1726
1727 spin_lock(&dev->dev_reservation_lock);
1728 if (!dev->dev_pr_res_holder) {
1729 len = sprintf(page, "No SPC-3 Reservation holder\n");
1730 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1731 len = sprintf(page, "SPC-3 Reservation: All Target"
1732 " Ports registration\n");
1733 } else {
1734 len = sprintf(page, "SPC-3 Reservation: Single"
1735 " Target Port registration\n");
1736 }
1737
1738 spin_unlock(&dev->dev_reservation_lock);
1739 return len;
1740 }
1741
1742 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1743 char *page)
1744 {
1745 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1746 }
1747
1748
1749 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1750 char *page)
1751 {
1752 struct se_device *dev = pr_to_dev(item);
1753 struct se_node_acl *se_nacl;
1754 struct se_portal_group *se_tpg;
1755 struct t10_pr_registration *pr_reg;
1756 const struct target_core_fabric_ops *tfo;
1757 ssize_t len = 0;
1758
1759 spin_lock(&dev->dev_reservation_lock);
1760 pr_reg = dev->dev_pr_res_holder;
1761 if (!pr_reg) {
1762 len = sprintf(page, "No SPC-3 Reservation holder\n");
1763 goto out_unlock;
1764 }
1765
1766 se_nacl = pr_reg->pr_reg_nacl;
1767 se_tpg = se_nacl->se_tpg;
1768 tfo = se_tpg->se_tpg_tfo;
1769
1770 len += sprintf(page+len, "SPC-3 Reservation: %s"
1771 " Target Node Endpoint: %s\n", tfo->fabric_name,
1772 tfo->tpg_get_wwn(se_tpg));
1773 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1774 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1775 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1776 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1777 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1778
1779 out_unlock:
1780 spin_unlock(&dev->dev_reservation_lock);
1781 return len;
1782 }
1783
1784
1785 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1786 char *page)
1787 {
1788 struct se_device *dev = pr_to_dev(item);
1789 const struct target_core_fabric_ops *tfo;
1790 struct t10_pr_registration *pr_reg;
1791 unsigned char buf[384];
1792 char i_buf[PR_REG_ISID_ID_LEN];
1793 ssize_t len = 0;
1794 int reg_count = 0;
1795
1796 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1797
1798 spin_lock(&dev->t10_pr.registration_lock);
1799 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1800 pr_reg_list) {
1801
1802 memset(buf, 0, 384);
1803 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1804 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1805 core_pr_dump_initiator_port(pr_reg, i_buf,
1806 PR_REG_ISID_ID_LEN);
1807 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1808 tfo->fabric_name,
1809 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1810 pr_reg->pr_res_generation);
1811
1812 if (len + strlen(buf) >= PAGE_SIZE)
1813 break;
1814
1815 len += sprintf(page+len, "%s", buf);
1816 reg_count++;
1817 }
1818 spin_unlock(&dev->t10_pr.registration_lock);
1819
1820 if (!reg_count)
1821 len += sprintf(page+len, "None\n");
1822
1823 return len;
1824 }
1825
1826 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1827 {
1828 struct se_device *dev = pr_to_dev(item);
1829 struct t10_pr_registration *pr_reg;
1830 ssize_t len = 0;
1831
1832 spin_lock(&dev->dev_reservation_lock);
1833 pr_reg = dev->dev_pr_res_holder;
1834 if (pr_reg) {
1835 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1836 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1837 } else {
1838 len = sprintf(page, "No SPC-3 Reservation holder\n");
1839 }
1840
1841 spin_unlock(&dev->dev_reservation_lock);
1842 return len;
1843 }
1844
1845 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1846 {
1847 struct se_device *dev = pr_to_dev(item);
1848
1849 if (!dev->dev_attrib.emulate_pr)
1850 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1851 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1852 return sprintf(page, "SPC_PASSTHROUGH\n");
1853 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1854 return sprintf(page, "SPC2_RESERVATIONS\n");
1855
1856 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1857 }
1858
1859 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1860 char *page)
1861 {
1862 struct se_device *dev = pr_to_dev(item);
1863
1864 if (!dev->dev_attrib.emulate_pr ||
1865 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1866 return 0;
1867
1868 return sprintf(page, "APTPL Bit Status: %s\n",
1869 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1870 }
1871
1872 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1873 char *page)
1874 {
1875 struct se_device *dev = pr_to_dev(item);
1876
1877 if (!dev->dev_attrib.emulate_pr ||
1878 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1879 return 0;
1880
1881 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1882 }
1883
1884 enum {
1885 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1886 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1887 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1888 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1889 };
1890
1891 static match_table_t tokens = {
1892 {Opt_initiator_fabric, "initiator_fabric=%s"},
1893 {Opt_initiator_node, "initiator_node=%s"},
1894 {Opt_initiator_sid, "initiator_sid=%s"},
1895 {Opt_sa_res_key, "sa_res_key=%s"},
1896 {Opt_res_holder, "res_holder=%d"},
1897 {Opt_res_type, "res_type=%d"},
1898 {Opt_res_scope, "res_scope=%d"},
1899 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1900 {Opt_mapped_lun, "mapped_lun=%u"},
1901 {Opt_target_fabric, "target_fabric=%s"},
1902 {Opt_target_node, "target_node=%s"},
1903 {Opt_tpgt, "tpgt=%d"},
1904 {Opt_port_rtpi, "port_rtpi=%d"},
1905 {Opt_target_lun, "target_lun=%u"},
1906 {Opt_err, NULL}
1907 };
1908
1909 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1910 const char *page, size_t count)
1911 {
1912 struct se_device *dev = pr_to_dev(item);
1913 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1914 unsigned char *t_fabric = NULL, *t_port = NULL;
1915 char *orig, *ptr, *opts;
1916 substring_t args[MAX_OPT_ARGS];
1917 unsigned long long tmp_ll;
1918 u64 sa_res_key = 0;
1919 u64 mapped_lun = 0, target_lun = 0;
1920 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1921 u16 tpgt = 0;
1922 u8 type = 0;
1923
1924 if (!dev->dev_attrib.emulate_pr ||
1925 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1926 return count;
1927 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1928 return count;
1929
1930 if (dev->export_count) {
1931 pr_debug("Unable to process APTPL metadata while"
1932 " active fabric exports exist\n");
1933 return -EINVAL;
1934 }
1935
1936 opts = kstrdup(page, GFP_KERNEL);
1937 if (!opts)
1938 return -ENOMEM;
1939
1940 orig = opts;
1941 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1942 if (!*ptr)
1943 continue;
1944
1945 token = match_token(ptr, tokens, args);
1946 switch (token) {
1947 case Opt_initiator_fabric:
1948 i_fabric = match_strdup(args);
1949 if (!i_fabric) {
1950 ret = -ENOMEM;
1951 goto out;
1952 }
1953 break;
1954 case Opt_initiator_node:
1955 i_port = match_strdup(args);
1956 if (!i_port) {
1957 ret = -ENOMEM;
1958 goto out;
1959 }
1960 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
1961 pr_err("APTPL metadata initiator_node="
1962 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
1963 PR_APTPL_MAX_IPORT_LEN);
1964 ret = -EINVAL;
1965 break;
1966 }
1967 break;
1968 case Opt_initiator_sid:
1969 isid = match_strdup(args);
1970 if (!isid) {
1971 ret = -ENOMEM;
1972 goto out;
1973 }
1974 if (strlen(isid) >= PR_REG_ISID_LEN) {
1975 pr_err("APTPL metadata initiator_isid"
1976 "= exceeds PR_REG_ISID_LEN: %d\n",
1977 PR_REG_ISID_LEN);
1978 ret = -EINVAL;
1979 break;
1980 }
1981 break;
1982 case Opt_sa_res_key:
1983 ret = match_u64(args, &tmp_ll);
1984 if (ret < 0) {
1985 pr_err("kstrtoull() failed for sa_res_key=\n");
1986 goto out;
1987 }
1988 sa_res_key = (u64)tmp_ll;
1989 break;
1990 /*
1991 * PR APTPL Metadata for Reservation
1992 */
1993 case Opt_res_holder:
1994 ret = match_int(args, &arg);
1995 if (ret)
1996 goto out;
1997 res_holder = arg;
1998 break;
1999 case Opt_res_type:
2000 ret = match_int(args, &arg);
2001 if (ret)
2002 goto out;
2003 type = (u8)arg;
2004 break;
2005 case Opt_res_scope:
2006 ret = match_int(args, &arg);
2007 if (ret)
2008 goto out;
2009 break;
2010 case Opt_res_all_tg_pt:
2011 ret = match_int(args, &arg);
2012 if (ret)
2013 goto out;
2014 all_tg_pt = (int)arg;
2015 break;
2016 case Opt_mapped_lun:
2017 ret = match_u64(args, &tmp_ll);
2018 if (ret)
2019 goto out;
2020 mapped_lun = (u64)tmp_ll;
2021 break;
2022 /*
2023 * PR APTPL Metadata for Target Port
2024 */
2025 case Opt_target_fabric:
2026 t_fabric = match_strdup(args);
2027 if (!t_fabric) {
2028 ret = -ENOMEM;
2029 goto out;
2030 }
2031 break;
2032 case Opt_target_node:
2033 t_port = match_strdup(args);
2034 if (!t_port) {
2035 ret = -ENOMEM;
2036 goto out;
2037 }
2038 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2039 pr_err("APTPL metadata target_node="
2040 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2041 PR_APTPL_MAX_TPORT_LEN);
2042 ret = -EINVAL;
2043 break;
2044 }
2045 break;
2046 case Opt_tpgt:
2047 ret = match_int(args, &arg);
2048 if (ret)
2049 goto out;
2050 tpgt = (u16)arg;
2051 break;
2052 case Opt_port_rtpi:
2053 ret = match_int(args, &arg);
2054 if (ret)
2055 goto out;
2056 break;
2057 case Opt_target_lun:
2058 ret = match_u64(args, &tmp_ll);
2059 if (ret)
2060 goto out;
2061 target_lun = (u64)tmp_ll;
2062 break;
2063 default:
2064 break;
2065 }
2066 }
2067
2068 if (!i_port || !t_port || !sa_res_key) {
2069 pr_err("Illegal parameters for APTPL registration\n");
2070 ret = -EINVAL;
2071 goto out;
2072 }
2073
2074 if (res_holder && !(type)) {
2075 pr_err("Illegal PR type: 0x%02x for reservation"
2076 " holder\n", type);
2077 ret = -EINVAL;
2078 goto out;
2079 }
2080
2081 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2082 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2083 res_holder, all_tg_pt, type);
2084 out:
2085 kfree(i_fabric);
2086 kfree(i_port);
2087 kfree(isid);
2088 kfree(t_fabric);
2089 kfree(t_port);
2090 kfree(orig);
2091 return (ret == 0) ? count : ret;
2092 }
2093
2094
2095 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2096 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2097 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2098 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2099 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2100 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2101 CONFIGFS_ATTR_RO(target_pr_, res_type);
2102 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2103 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2104
2105 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2106 &target_pr_attr_res_holder,
2107 &target_pr_attr_res_pr_all_tgt_pts,
2108 &target_pr_attr_res_pr_generation,
2109 &target_pr_attr_res_pr_holder_tg_port,
2110 &target_pr_attr_res_pr_registered_i_pts,
2111 &target_pr_attr_res_pr_type,
2112 &target_pr_attr_res_type,
2113 &target_pr_attr_res_aptpl_active,
2114 &target_pr_attr_res_aptpl_metadata,
2115 NULL,
2116 };
2117
2118 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2119
2120 /* End functions for struct config_item_type tb_dev_pr_cit */
2121
2122 /* Start functions for struct config_item_type tb_dev_cit */
2123
2124 static inline struct se_device *to_device(struct config_item *item)
2125 {
2126 return container_of(to_config_group(item), struct se_device, dev_group);
2127 }
2128
2129 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2130 {
2131 struct se_device *dev = to_device(item);
2132 int bl = 0;
2133 ssize_t read_bytes = 0;
2134
2135 transport_dump_dev_state(dev, page, &bl);
2136 read_bytes += bl;
2137 read_bytes += dev->transport->show_configfs_dev_params(dev,
2138 page+read_bytes);
2139 return read_bytes;
2140 }
2141
2142 static ssize_t target_dev_control_store(struct config_item *item,
2143 const char *page, size_t count)
2144 {
2145 struct se_device *dev = to_device(item);
2146
2147 return dev->transport->set_configfs_dev_params(dev, page, count);
2148 }
2149
2150 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2151 {
2152 struct se_device *dev = to_device(item);
2153
2154 if (!(dev->dev_flags & DF_USING_ALIAS))
2155 return 0;
2156
2157 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2158 }
2159
2160 static ssize_t target_dev_alias_store(struct config_item *item,
2161 const char *page, size_t count)
2162 {
2163 struct se_device *dev = to_device(item);
2164 struct se_hba *hba = dev->se_hba;
2165 ssize_t read_bytes;
2166
2167 if (count > (SE_DEV_ALIAS_LEN-1)) {
2168 pr_err("alias count: %d exceeds"
2169 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2170 SE_DEV_ALIAS_LEN-1);
2171 return -EINVAL;
2172 }
2173
2174 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2175 if (!read_bytes)
2176 return -EINVAL;
2177 if (dev->dev_alias[read_bytes - 1] == '\n')
2178 dev->dev_alias[read_bytes - 1] = '\0';
2179
2180 dev->dev_flags |= DF_USING_ALIAS;
2181
2182 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2183 config_item_name(&hba->hba_group.cg_item),
2184 config_item_name(&dev->dev_group.cg_item),
2185 dev->dev_alias);
2186
2187 return read_bytes;
2188 }
2189
2190 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2191 {
2192 struct se_device *dev = to_device(item);
2193
2194 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2195 return 0;
2196
2197 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2198 }
2199
2200 static ssize_t target_dev_udev_path_store(struct config_item *item,
2201 const char *page, size_t count)
2202 {
2203 struct se_device *dev = to_device(item);
2204 struct se_hba *hba = dev->se_hba;
2205 ssize_t read_bytes;
2206
2207 if (count > (SE_UDEV_PATH_LEN-1)) {
2208 pr_err("udev_path count: %d exceeds"
2209 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2210 SE_UDEV_PATH_LEN-1);
2211 return -EINVAL;
2212 }
2213
2214 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2215 "%s", page);
2216 if (!read_bytes)
2217 return -EINVAL;
2218 if (dev->udev_path[read_bytes - 1] == '\n')
2219 dev->udev_path[read_bytes - 1] = '\0';
2220
2221 dev->dev_flags |= DF_USING_UDEV_PATH;
2222
2223 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2224 config_item_name(&hba->hba_group.cg_item),
2225 config_item_name(&dev->dev_group.cg_item),
2226 dev->udev_path);
2227
2228 return read_bytes;
2229 }
2230
2231 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2232 {
2233 struct se_device *dev = to_device(item);
2234
2235 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2236 }
2237
2238 static ssize_t target_dev_enable_store(struct config_item *item,
2239 const char *page, size_t count)
2240 {
2241 struct se_device *dev = to_device(item);
2242 char *ptr;
2243 int ret;
2244
2245 ptr = strstr(page, "1");
2246 if (!ptr) {
2247 pr_err("For dev_enable ops, only valid value"
2248 " is \"1\"\n");
2249 return -EINVAL;
2250 }
2251
2252 ret = target_configure_device(dev);
2253 if (ret)
2254 return ret;
2255 return count;
2256 }
2257
2258 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2259 {
2260 struct se_device *dev = to_device(item);
2261 struct config_item *lu_ci;
2262 struct t10_alua_lu_gp *lu_gp;
2263 struct t10_alua_lu_gp_member *lu_gp_mem;
2264 ssize_t len = 0;
2265
2266 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2267 if (!lu_gp_mem)
2268 return 0;
2269
2270 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2271 lu_gp = lu_gp_mem->lu_gp;
2272 if (lu_gp) {
2273 lu_ci = &lu_gp->lu_gp_group.cg_item;
2274 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2275 config_item_name(lu_ci), lu_gp->lu_gp_id);
2276 }
2277 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2278
2279 return len;
2280 }
2281
2282 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2283 const char *page, size_t count)
2284 {
2285 struct se_device *dev = to_device(item);
2286 struct se_hba *hba = dev->se_hba;
2287 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2288 struct t10_alua_lu_gp_member *lu_gp_mem;
2289 unsigned char buf[LU_GROUP_NAME_BUF];
2290 int move = 0;
2291
2292 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2293 if (!lu_gp_mem)
2294 return count;
2295
2296 if (count > LU_GROUP_NAME_BUF) {
2297 pr_err("ALUA LU Group Alias too large!\n");
2298 return -EINVAL;
2299 }
2300 memset(buf, 0, LU_GROUP_NAME_BUF);
2301 memcpy(buf, page, count);
2302 /*
2303 * Any ALUA logical unit alias besides "NULL" means we will be
2304 * making a new group association.
2305 */
2306 if (strcmp(strstrip(buf), "NULL")) {
2307 /*
2308 * core_alua_get_lu_gp_by_name() will increment reference to
2309 * struct t10_alua_lu_gp. This reference is released with
2310 * core_alua_get_lu_gp_by_name below().
2311 */
2312 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2313 if (!lu_gp_new)
2314 return -ENODEV;
2315 }
2316
2317 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2318 lu_gp = lu_gp_mem->lu_gp;
2319 if (lu_gp) {
2320 /*
2321 * Clearing an existing lu_gp association, and replacing
2322 * with NULL
2323 */
2324 if (!lu_gp_new) {
2325 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2326 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2327 " %hu\n",
2328 config_item_name(&hba->hba_group.cg_item),
2329 config_item_name(&dev->dev_group.cg_item),
2330 config_item_name(&lu_gp->lu_gp_group.cg_item),
2331 lu_gp->lu_gp_id);
2332
2333 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2334 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2335
2336 return count;
2337 }
2338 /*
2339 * Removing existing association of lu_gp_mem with lu_gp
2340 */
2341 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2342 move = 1;
2343 }
2344 /*
2345 * Associate lu_gp_mem with lu_gp_new.
2346 */
2347 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2348 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2349
2350 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2351 " core/alua/lu_gps/%s, ID: %hu\n",
2352 (move) ? "Moving" : "Adding",
2353 config_item_name(&hba->hba_group.cg_item),
2354 config_item_name(&dev->dev_group.cg_item),
2355 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2356 lu_gp_new->lu_gp_id);
2357
2358 core_alua_put_lu_gp_from_name(lu_gp_new);
2359 return count;
2360 }
2361
2362 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2363 {
2364 struct se_device *dev = to_device(item);
2365 struct t10_alua_lba_map *map;
2366 struct t10_alua_lba_map_member *mem;
2367 char *b = page;
2368 int bl = 0;
2369 char state;
2370
2371 spin_lock(&dev->t10_alua.lba_map_lock);
2372 if (!list_empty(&dev->t10_alua.lba_map_list))
2373 bl += sprintf(b + bl, "%u %u\n",
2374 dev->t10_alua.lba_map_segment_size,
2375 dev->t10_alua.lba_map_segment_multiplier);
2376 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2377 bl += sprintf(b + bl, "%llu %llu",
2378 map->lba_map_first_lba, map->lba_map_last_lba);
2379 list_for_each_entry(mem, &map->lba_map_mem_list,
2380 lba_map_mem_list) {
2381 switch (mem->lba_map_mem_alua_state) {
2382 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2383 state = 'O';
2384 break;
2385 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2386 state = 'A';
2387 break;
2388 case ALUA_ACCESS_STATE_STANDBY:
2389 state = 'S';
2390 break;
2391 case ALUA_ACCESS_STATE_UNAVAILABLE:
2392 state = 'U';
2393 break;
2394 default:
2395 state = '.';
2396 break;
2397 }
2398 bl += sprintf(b + bl, " %d:%c",
2399 mem->lba_map_mem_alua_pg_id, state);
2400 }
2401 bl += sprintf(b + bl, "\n");
2402 }
2403 spin_unlock(&dev->t10_alua.lba_map_lock);
2404 return bl;
2405 }
2406
2407 static ssize_t target_dev_lba_map_store(struct config_item *item,
2408 const char *page, size_t count)
2409 {
2410 struct se_device *dev = to_device(item);
2411 struct t10_alua_lba_map *lba_map = NULL;
2412 struct list_head lba_list;
2413 char *map_entries, *orig, *ptr;
2414 char state;
2415 int pg_num = -1, pg;
2416 int ret = 0, num = 0, pg_id, alua_state;
2417 unsigned long start_lba = -1, end_lba = -1;
2418 unsigned long segment_size = -1, segment_mult = -1;
2419
2420 orig = map_entries = kstrdup(page, GFP_KERNEL);
2421 if (!map_entries)
2422 return -ENOMEM;
2423
2424 INIT_LIST_HEAD(&lba_list);
2425 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2426 if (!*ptr)
2427 continue;
2428
2429 if (num == 0) {
2430 if (sscanf(ptr, "%lu %lu\n",
2431 &segment_size, &segment_mult) != 2) {
2432 pr_err("Invalid line %d\n", num);
2433 ret = -EINVAL;
2434 break;
2435 }
2436 num++;
2437 continue;
2438 }
2439 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2440 pr_err("Invalid line %d\n", num);
2441 ret = -EINVAL;
2442 break;
2443 }
2444 ptr = strchr(ptr, ' ');
2445 if (!ptr) {
2446 pr_err("Invalid line %d, missing end lba\n", num);
2447 ret = -EINVAL;
2448 break;
2449 }
2450 ptr++;
2451 ptr = strchr(ptr, ' ');
2452 if (!ptr) {
2453 pr_err("Invalid line %d, missing state definitions\n",
2454 num);
2455 ret = -EINVAL;
2456 break;
2457 }
2458 ptr++;
2459 lba_map = core_alua_allocate_lba_map(&lba_list,
2460 start_lba, end_lba);
2461 if (IS_ERR(lba_map)) {
2462 ret = PTR_ERR(lba_map);
2463 break;
2464 }
2465 pg = 0;
2466 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2467 switch (state) {
2468 case 'O':
2469 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2470 break;
2471 case 'A':
2472 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2473 break;
2474 case 'S':
2475 alua_state = ALUA_ACCESS_STATE_STANDBY;
2476 break;
2477 case 'U':
2478 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2479 break;
2480 default:
2481 pr_err("Invalid ALUA state '%c'\n", state);
2482 ret = -EINVAL;
2483 goto out;
2484 }
2485
2486 ret = core_alua_allocate_lba_map_mem(lba_map,
2487 pg_id, alua_state);
2488 if (ret) {
2489 pr_err("Invalid target descriptor %d:%c "
2490 "at line %d\n",
2491 pg_id, state, num);
2492 break;
2493 }
2494 pg++;
2495 ptr = strchr(ptr, ' ');
2496 if (ptr)
2497 ptr++;
2498 else
2499 break;
2500 }
2501 if (pg_num == -1)
2502 pg_num = pg;
2503 else if (pg != pg_num) {
2504 pr_err("Only %d from %d port groups definitions "
2505 "at line %d\n", pg, pg_num, num);
2506 ret = -EINVAL;
2507 break;
2508 }
2509 num++;
2510 }
2511 out:
2512 if (ret) {
2513 core_alua_free_lba_map(&lba_list);
2514 count = ret;
2515 } else
2516 core_alua_set_lba_map(dev, &lba_list,
2517 segment_size, segment_mult);
2518 kfree(orig);
2519 return count;
2520 }
2521
2522 CONFIGFS_ATTR_RO(target_dev_, info);
2523 CONFIGFS_ATTR_WO(target_dev_, control);
2524 CONFIGFS_ATTR(target_dev_, alias);
2525 CONFIGFS_ATTR(target_dev_, udev_path);
2526 CONFIGFS_ATTR(target_dev_, enable);
2527 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2528 CONFIGFS_ATTR(target_dev_, lba_map);
2529
2530 static struct configfs_attribute *target_core_dev_attrs[] = {
2531 &target_dev_attr_info,
2532 &target_dev_attr_control,
2533 &target_dev_attr_alias,
2534 &target_dev_attr_udev_path,
2535 &target_dev_attr_enable,
2536 &target_dev_attr_alua_lu_gp,
2537 &target_dev_attr_lba_map,
2538 NULL,
2539 };
2540
2541 static void target_core_dev_release(struct config_item *item)
2542 {
2543 struct config_group *dev_cg = to_config_group(item);
2544 struct se_device *dev =
2545 container_of(dev_cg, struct se_device, dev_group);
2546
2547 target_free_device(dev);
2548 }
2549
2550 /*
2551 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2552 * within target_fabric_port_link()
2553 */
2554 struct configfs_item_operations target_core_dev_item_ops = {
2555 .release = target_core_dev_release,
2556 };
2557
2558 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2559
2560 /* End functions for struct config_item_type tb_dev_cit */
2561
2562 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2563
2564 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2565 {
2566 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2567 lu_gp_group);
2568 }
2569
2570 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2571 {
2572 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2573
2574 if (!lu_gp->lu_gp_valid_id)
2575 return 0;
2576 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2577 }
2578
2579 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2580 const char *page, size_t count)
2581 {
2582 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2583 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2584 unsigned long lu_gp_id;
2585 int ret;
2586
2587 ret = kstrtoul(page, 0, &lu_gp_id);
2588 if (ret < 0) {
2589 pr_err("kstrtoul() returned %d for"
2590 " lu_gp_id\n", ret);
2591 return ret;
2592 }
2593 if (lu_gp_id > 0x0000ffff) {
2594 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2595 " 0x0000ffff\n", lu_gp_id);
2596 return -EINVAL;
2597 }
2598
2599 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2600 if (ret < 0)
2601 return -EINVAL;
2602
2603 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2604 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2605 config_item_name(&alua_lu_gp_cg->cg_item),
2606 lu_gp->lu_gp_id);
2607
2608 return count;
2609 }
2610
2611 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2612 {
2613 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2614 struct se_device *dev;
2615 struct se_hba *hba;
2616 struct t10_alua_lu_gp_member *lu_gp_mem;
2617 ssize_t len = 0, cur_len;
2618 unsigned char buf[LU_GROUP_NAME_BUF];
2619
2620 memset(buf, 0, LU_GROUP_NAME_BUF);
2621
2622 spin_lock(&lu_gp->lu_gp_lock);
2623 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2624 dev = lu_gp_mem->lu_gp_mem_dev;
2625 hba = dev->se_hba;
2626
2627 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2628 config_item_name(&hba->hba_group.cg_item),
2629 config_item_name(&dev->dev_group.cg_item));
2630 cur_len++; /* Extra byte for NULL terminator */
2631
2632 if ((cur_len + len) > PAGE_SIZE) {
2633 pr_warn("Ran out of lu_gp_show_attr"
2634 "_members buffer\n");
2635 break;
2636 }
2637 memcpy(page+len, buf, cur_len);
2638 len += cur_len;
2639 }
2640 spin_unlock(&lu_gp->lu_gp_lock);
2641
2642 return len;
2643 }
2644
2645 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2646 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2647
2648 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2649 &target_lu_gp_attr_lu_gp_id,
2650 &target_lu_gp_attr_members,
2651 NULL,
2652 };
2653
2654 static void target_core_alua_lu_gp_release(struct config_item *item)
2655 {
2656 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2657 struct t10_alua_lu_gp, lu_gp_group);
2658
2659 core_alua_free_lu_gp(lu_gp);
2660 }
2661
2662 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2663 .release = target_core_alua_lu_gp_release,
2664 };
2665
2666 static const struct config_item_type target_core_alua_lu_gp_cit = {
2667 .ct_item_ops = &target_core_alua_lu_gp_ops,
2668 .ct_attrs = target_core_alua_lu_gp_attrs,
2669 .ct_owner = THIS_MODULE,
2670 };
2671
2672 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2673
2674 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2675
2676 static struct config_group *target_core_alua_create_lu_gp(
2677 struct config_group *group,
2678 const char *name)
2679 {
2680 struct t10_alua_lu_gp *lu_gp;
2681 struct config_group *alua_lu_gp_cg = NULL;
2682 struct config_item *alua_lu_gp_ci = NULL;
2683
2684 lu_gp = core_alua_allocate_lu_gp(name, 0);
2685 if (IS_ERR(lu_gp))
2686 return NULL;
2687
2688 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2689 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2690
2691 config_group_init_type_name(alua_lu_gp_cg, name,
2692 &target_core_alua_lu_gp_cit);
2693
2694 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2695 " Group: core/alua/lu_gps/%s\n",
2696 config_item_name(alua_lu_gp_ci));
2697
2698 return alua_lu_gp_cg;
2699
2700 }
2701
2702 static void target_core_alua_drop_lu_gp(
2703 struct config_group *group,
2704 struct config_item *item)
2705 {
2706 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2707 struct t10_alua_lu_gp, lu_gp_group);
2708
2709 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2710 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2711 config_item_name(item), lu_gp->lu_gp_id);
2712 /*
2713 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2714 * -> target_core_alua_lu_gp_release()
2715 */
2716 config_item_put(item);
2717 }
2718
2719 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2720 .make_group = &target_core_alua_create_lu_gp,
2721 .drop_item = &target_core_alua_drop_lu_gp,
2722 };
2723
2724 static const struct config_item_type target_core_alua_lu_gps_cit = {
2725 .ct_item_ops = NULL,
2726 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2727 .ct_owner = THIS_MODULE,
2728 };
2729
2730 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2731
2732 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2733
2734 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2735 {
2736 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2737 tg_pt_gp_group);
2738 }
2739
2740 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2741 char *page)
2742 {
2743 return sprintf(page, "%d\n",
2744 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2745 }
2746
2747 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2748 const char *page, size_t count)
2749 {
2750 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2751 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2752 unsigned long tmp;
2753 int new_state, ret;
2754
2755 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2756 pr_err("Unable to do implicit ALUA on non valid"
2757 " tg_pt_gp ID: %hu\n", tg_pt_gp->tg_pt_gp_valid_id);
2758 return -EINVAL;
2759 }
2760 if (!target_dev_configured(dev)) {
2761 pr_err("Unable to set alua_access_state while device is"
2762 " not configured\n");
2763 return -ENODEV;
2764 }
2765
2766 ret = kstrtoul(page, 0, &tmp);
2767 if (ret < 0) {
2768 pr_err("Unable to extract new ALUA access state from"
2769 " %s\n", page);
2770 return ret;
2771 }
2772 new_state = (int)tmp;
2773
2774 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2775 pr_err("Unable to process implicit configfs ALUA"
2776 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2777 return -EINVAL;
2778 }
2779 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2780 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2781 /* LBA DEPENDENT is only allowed with implicit ALUA */
2782 pr_err("Unable to process implicit configfs ALUA transition"
2783 " while explicit ALUA management is enabled\n");
2784 return -EINVAL;
2785 }
2786
2787 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2788 NULL, NULL, new_state, 0);
2789 return (!ret) ? count : -EINVAL;
2790 }
2791
2792 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2793 char *page)
2794 {
2795 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2796 return sprintf(page, "%s\n",
2797 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2798 }
2799
2800 static ssize_t target_tg_pt_gp_alua_access_status_store(
2801 struct config_item *item, const char *page, size_t count)
2802 {
2803 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2804 unsigned long tmp;
2805 int new_status, ret;
2806
2807 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2808 pr_err("Unable to do set ALUA access status on non"
2809 " valid tg_pt_gp ID: %hu\n",
2810 tg_pt_gp->tg_pt_gp_valid_id);
2811 return -EINVAL;
2812 }
2813
2814 ret = kstrtoul(page, 0, &tmp);
2815 if (ret < 0) {
2816 pr_err("Unable to extract new ALUA access status"
2817 " from %s\n", page);
2818 return ret;
2819 }
2820 new_status = (int)tmp;
2821
2822 if ((new_status != ALUA_STATUS_NONE) &&
2823 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2824 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2825 pr_err("Illegal ALUA access status: 0x%02x\n",
2826 new_status);
2827 return -EINVAL;
2828 }
2829
2830 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2831 return count;
2832 }
2833
2834 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2835 char *page)
2836 {
2837 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2838 }
2839
2840 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2841 const char *page, size_t count)
2842 {
2843 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2844 }
2845
2846 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2847 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2848 struct config_item *item, char *p) \
2849 { \
2850 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2851 return sprintf(p, "%d\n", \
2852 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2853 } \
2854 \
2855 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2856 struct config_item *item, const char *p, size_t c) \
2857 { \
2858 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2859 unsigned long tmp; \
2860 int ret; \
2861 \
2862 if (!t->tg_pt_gp_valid_id) { \
2863 pr_err("Unable to do set " #_name " ALUA state on non" \
2864 " valid tg_pt_gp ID: %hu\n", \
2865 t->tg_pt_gp_valid_id); \
2866 return -EINVAL; \
2867 } \
2868 \
2869 ret = kstrtoul(p, 0, &tmp); \
2870 if (ret < 0) { \
2871 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2872 return -EINVAL; \
2873 } \
2874 if (tmp > 1) { \
2875 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2876 return -EINVAL; \
2877 } \
2878 if (tmp) \
2879 t->tg_pt_gp_alua_supported_states |= _bit; \
2880 else \
2881 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2882 \
2883 return c; \
2884 }
2885
2886 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2887 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2888 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2889 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2890 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2891 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2892 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2893
2894 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2895 struct config_item *item, char *page)
2896 {
2897 return sprintf(page, "%d\n",
2898 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2899 }
2900
2901 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2902 struct config_item *item, const char *page, size_t count)
2903 {
2904 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2905 unsigned long tmp;
2906 int ret;
2907
2908 ret = kstrtoul(page, 0, &tmp);
2909 if (ret < 0) {
2910 pr_err("Unable to extract alua_write_metadata\n");
2911 return ret;
2912 }
2913
2914 if ((tmp != 0) && (tmp != 1)) {
2915 pr_err("Illegal value for alua_write_metadata:"
2916 " %lu\n", tmp);
2917 return -EINVAL;
2918 }
2919 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2920
2921 return count;
2922 }
2923
2924 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2925 char *page)
2926 {
2927 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2928 }
2929
2930 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2931 const char *page, size_t count)
2932 {
2933 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2934 count);
2935 }
2936
2937 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2938 char *page)
2939 {
2940 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2941 }
2942
2943 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2944 const char *page, size_t count)
2945 {
2946 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2947 count);
2948 }
2949
2950 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2951 struct config_item *item, char *page)
2952 {
2953 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2954 }
2955
2956 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2957 struct config_item *item, const char *page, size_t count)
2958 {
2959 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2960 count);
2961 }
2962
2963 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
2964 char *page)
2965 {
2966 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
2967 }
2968
2969 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
2970 const char *page, size_t count)
2971 {
2972 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
2973 }
2974
2975 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
2976 char *page)
2977 {
2978 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2979
2980 if (!tg_pt_gp->tg_pt_gp_valid_id)
2981 return 0;
2982 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
2983 }
2984
2985 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
2986 const char *page, size_t count)
2987 {
2988 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2989 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
2990 unsigned long tg_pt_gp_id;
2991 int ret;
2992
2993 ret = kstrtoul(page, 0, &tg_pt_gp_id);
2994 if (ret < 0) {
2995 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
2996 page);
2997 return ret;
2998 }
2999 if (tg_pt_gp_id > 0x0000ffff) {
3000 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3001 tg_pt_gp_id);
3002 return -EINVAL;
3003 }
3004
3005 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3006 if (ret < 0)
3007 return -EINVAL;
3008
3009 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3010 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3011 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3012 tg_pt_gp->tg_pt_gp_id);
3013
3014 return count;
3015 }
3016
3017 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3018 char *page)
3019 {
3020 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3021 struct se_lun *lun;
3022 ssize_t len = 0, cur_len;
3023 unsigned char buf[TG_PT_GROUP_NAME_BUF];
3024
3025 memset(buf, 0, TG_PT_GROUP_NAME_BUF);
3026
3027 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3028 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3029 lun_tg_pt_gp_link) {
3030 struct se_portal_group *tpg = lun->lun_tpg;
3031
3032 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3033 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3034 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3035 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3036 config_item_name(&lun->lun_group.cg_item));
3037 cur_len++; /* Extra byte for NULL terminator */
3038
3039 if ((cur_len + len) > PAGE_SIZE) {
3040 pr_warn("Ran out of lu_gp_show_attr"
3041 "_members buffer\n");
3042 break;
3043 }
3044 memcpy(page+len, buf, cur_len);
3045 len += cur_len;
3046 }
3047 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3048
3049 return len;
3050 }
3051
3052 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3053 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3054 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3055 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3056 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3057 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3058 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3059 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3060 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3061 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3062 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3063 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3064 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3065 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3066 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3067 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3068 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3069
3070 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3071 &target_tg_pt_gp_attr_alua_access_state,
3072 &target_tg_pt_gp_attr_alua_access_status,
3073 &target_tg_pt_gp_attr_alua_access_type,
3074 &target_tg_pt_gp_attr_alua_support_transitioning,
3075 &target_tg_pt_gp_attr_alua_support_offline,
3076 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3077 &target_tg_pt_gp_attr_alua_support_unavailable,
3078 &target_tg_pt_gp_attr_alua_support_standby,
3079 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3080 &target_tg_pt_gp_attr_alua_support_active_optimized,
3081 &target_tg_pt_gp_attr_alua_write_metadata,
3082 &target_tg_pt_gp_attr_nonop_delay_msecs,
3083 &target_tg_pt_gp_attr_trans_delay_msecs,
3084 &target_tg_pt_gp_attr_implicit_trans_secs,
3085 &target_tg_pt_gp_attr_preferred,
3086 &target_tg_pt_gp_attr_tg_pt_gp_id,
3087 &target_tg_pt_gp_attr_members,
3088 NULL,
3089 };
3090
3091 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3092 {
3093 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3094 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3095
3096 core_alua_free_tg_pt_gp(tg_pt_gp);
3097 }
3098
3099 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3100 .release = target_core_alua_tg_pt_gp_release,
3101 };
3102
3103 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3104 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3105 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3106 .ct_owner = THIS_MODULE,
3107 };
3108
3109 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3110
3111 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3112
3113 static struct config_group *target_core_alua_create_tg_pt_gp(
3114 struct config_group *group,
3115 const char *name)
3116 {
3117 struct t10_alua *alua = container_of(group, struct t10_alua,
3118 alua_tg_pt_gps_group);
3119 struct t10_alua_tg_pt_gp *tg_pt_gp;
3120 struct config_group *alua_tg_pt_gp_cg = NULL;
3121 struct config_item *alua_tg_pt_gp_ci = NULL;
3122
3123 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3124 if (!tg_pt_gp)
3125 return NULL;
3126
3127 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3128 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3129
3130 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3131 &target_core_alua_tg_pt_gp_cit);
3132
3133 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3134 " Group: alua/tg_pt_gps/%s\n",
3135 config_item_name(alua_tg_pt_gp_ci));
3136
3137 return alua_tg_pt_gp_cg;
3138 }
3139
3140 static void target_core_alua_drop_tg_pt_gp(
3141 struct config_group *group,
3142 struct config_item *item)
3143 {
3144 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3145 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3146
3147 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3148 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3149 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3150 /*
3151 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3152 * -> target_core_alua_tg_pt_gp_release().
3153 */
3154 config_item_put(item);
3155 }
3156
3157 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3158 .make_group = &target_core_alua_create_tg_pt_gp,
3159 .drop_item = &target_core_alua_drop_tg_pt_gp,
3160 };
3161
3162 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3163
3164 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3165
3166 /* Start functions for struct config_item_type target_core_alua_cit */
3167
3168 /*
3169 * target_core_alua_cit is a ConfigFS group that lives under
3170 * /sys/kernel/config/target/core/alua. There are default groups
3171 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3172 * target_core_alua_cit in target_core_init_configfs() below.
3173 */
3174 static const struct config_item_type target_core_alua_cit = {
3175 .ct_item_ops = NULL,
3176 .ct_attrs = NULL,
3177 .ct_owner = THIS_MODULE,
3178 };
3179
3180 /* End functions for struct config_item_type target_core_alua_cit */
3181
3182 /* Start functions for struct config_item_type tb_dev_stat_cit */
3183
3184 static struct config_group *target_core_stat_mkdir(
3185 struct config_group *group,
3186 const char *name)
3187 {
3188 return ERR_PTR(-ENOSYS);
3189 }
3190
3191 static void target_core_stat_rmdir(
3192 struct config_group *group,
3193 struct config_item *item)
3194 {
3195 return;
3196 }
3197
3198 static struct configfs_group_operations target_core_stat_group_ops = {
3199 .make_group = &target_core_stat_mkdir,
3200 .drop_item = &target_core_stat_rmdir,
3201 };
3202
3203 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3204
3205 /* End functions for struct config_item_type tb_dev_stat_cit */
3206
3207 /* Start functions for struct config_item_type target_core_hba_cit */
3208
3209 static struct config_group *target_core_make_subdev(
3210 struct config_group *group,
3211 const char *name)
3212 {
3213 struct t10_alua_tg_pt_gp *tg_pt_gp;
3214 struct config_item *hba_ci = &group->cg_item;
3215 struct se_hba *hba = item_to_hba(hba_ci);
3216 struct target_backend *tb = hba->backend;
3217 struct se_device *dev;
3218 int errno = -ENOMEM, ret;
3219
3220 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3221 if (ret)
3222 return ERR_PTR(ret);
3223
3224 dev = target_alloc_device(hba, name);
3225 if (!dev)
3226 goto out_unlock;
3227
3228 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3229
3230 config_group_init_type_name(&dev->dev_action_group, "action",
3231 &tb->tb_dev_action_cit);
3232 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3233
3234 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3235 &tb->tb_dev_attrib_cit);
3236 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3237
3238 config_group_init_type_name(&dev->dev_pr_group, "pr",
3239 &tb->tb_dev_pr_cit);
3240 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3241
3242 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3243 &tb->tb_dev_wwn_cit);
3244 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3245 &dev->dev_group);
3246
3247 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3248 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3249 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3250 &dev->dev_group);
3251
3252 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3253 "statistics", &tb->tb_dev_stat_cit);
3254 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3255 &dev->dev_group);
3256
3257 /*
3258 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3259 */
3260 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3261 if (!tg_pt_gp)
3262 goto out_free_device;
3263 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3264
3265 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3266 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3267 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3268 &dev->t10_alua.alua_tg_pt_gps_group);
3269
3270 /*
3271 * Add core/$HBA/$DEV/statistics/ default groups
3272 */
3273 target_stat_setup_dev_default_groups(dev);
3274
3275 mutex_unlock(&hba->hba_access_mutex);
3276 return &dev->dev_group;
3277
3278 out_free_device:
3279 target_free_device(dev);
3280 out_unlock:
3281 mutex_unlock(&hba->hba_access_mutex);
3282 return ERR_PTR(errno);
3283 }
3284
3285 static void target_core_drop_subdev(
3286 struct config_group *group,
3287 struct config_item *item)
3288 {
3289 struct config_group *dev_cg = to_config_group(item);
3290 struct se_device *dev =
3291 container_of(dev_cg, struct se_device, dev_group);
3292 struct se_hba *hba;
3293
3294 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3295
3296 mutex_lock(&hba->hba_access_mutex);
3297
3298 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3299 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3300
3301 /*
3302 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3303 * directly from target_core_alua_tg_pt_gp_release().
3304 */
3305 dev->t10_alua.default_tg_pt_gp = NULL;
3306
3307 configfs_remove_default_groups(dev_cg);
3308
3309 /*
3310 * se_dev is released from target_core_dev_item_ops->release()
3311 */
3312 config_item_put(item);
3313 mutex_unlock(&hba->hba_access_mutex);
3314 }
3315
3316 static struct configfs_group_operations target_core_hba_group_ops = {
3317 .make_group = target_core_make_subdev,
3318 .drop_item = target_core_drop_subdev,
3319 };
3320
3321
3322 static inline struct se_hba *to_hba(struct config_item *item)
3323 {
3324 return container_of(to_config_group(item), struct se_hba, hba_group);
3325 }
3326
3327 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3328 {
3329 struct se_hba *hba = to_hba(item);
3330
3331 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3332 hba->hba_id, hba->backend->ops->name,
3333 TARGET_CORE_VERSION);
3334 }
3335
3336 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3337 {
3338 struct se_hba *hba = to_hba(item);
3339 int hba_mode = 0;
3340
3341 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3342 hba_mode = 1;
3343
3344 return sprintf(page, "%d\n", hba_mode);
3345 }
3346
3347 static ssize_t target_hba_mode_store(struct config_item *item,
3348 const char *page, size_t count)
3349 {
3350 struct se_hba *hba = to_hba(item);
3351 unsigned long mode_flag;
3352 int ret;
3353
3354 if (hba->backend->ops->pmode_enable_hba == NULL)
3355 return -EINVAL;
3356
3357 ret = kstrtoul(page, 0, &mode_flag);
3358 if (ret < 0) {
3359 pr_err("Unable to extract hba mode flag: %d\n", ret);
3360 return ret;
3361 }
3362
3363 if (hba->dev_count) {
3364 pr_err("Unable to set hba_mode with active devices\n");
3365 return -EINVAL;
3366 }
3367
3368 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3369 if (ret < 0)
3370 return -EINVAL;
3371 if (ret > 0)
3372 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3373 else if (ret == 0)
3374 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3375
3376 return count;
3377 }
3378
3379 CONFIGFS_ATTR_RO(target_, hba_info);
3380 CONFIGFS_ATTR(target_, hba_mode);
3381
3382 static void target_core_hba_release(struct config_item *item)
3383 {
3384 struct se_hba *hba = container_of(to_config_group(item),
3385 struct se_hba, hba_group);
3386 core_delete_hba(hba);
3387 }
3388
3389 static struct configfs_attribute *target_core_hba_attrs[] = {
3390 &target_attr_hba_info,
3391 &target_attr_hba_mode,
3392 NULL,
3393 };
3394
3395 static struct configfs_item_operations target_core_hba_item_ops = {
3396 .release = target_core_hba_release,
3397 };
3398
3399 static const struct config_item_type target_core_hba_cit = {
3400 .ct_item_ops = &target_core_hba_item_ops,
3401 .ct_group_ops = &target_core_hba_group_ops,
3402 .ct_attrs = target_core_hba_attrs,
3403 .ct_owner = THIS_MODULE,
3404 };
3405
3406 static struct config_group *target_core_call_addhbatotarget(
3407 struct config_group *group,
3408 const char *name)
3409 {
3410 char *se_plugin_str, *str, *str2;
3411 struct se_hba *hba;
3412 char buf[TARGET_CORE_NAME_MAX_LEN];
3413 unsigned long plugin_dep_id = 0;
3414 int ret;
3415
3416 memset(buf, 0, TARGET_CORE_NAME_MAX_LEN);
3417 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3418 pr_err("Passed *name strlen(): %d exceeds"
3419 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3420 TARGET_CORE_NAME_MAX_LEN);
3421 return ERR_PTR(-ENAMETOOLONG);
3422 }
3423 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3424
3425 str = strstr(buf, "_");
3426 if (!str) {
3427 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3428 return ERR_PTR(-EINVAL);
3429 }
3430 se_plugin_str = buf;
3431 /*
3432 * Special case for subsystem plugins that have "_" in their names.
3433 * Namely rd_direct and rd_mcp..
3434 */
3435 str2 = strstr(str+1, "_");
3436 if (str2) {
3437 *str2 = '\0'; /* Terminate for *se_plugin_str */
3438 str2++; /* Skip to start of plugin dependent ID */
3439 str = str2;
3440 } else {
3441 *str = '\0'; /* Terminate for *se_plugin_str */
3442 str++; /* Skip to start of plugin dependent ID */
3443 }
3444
3445 ret = kstrtoul(str, 0, &plugin_dep_id);
3446 if (ret < 0) {
3447 pr_err("kstrtoul() returned %d for"
3448 " plugin_dep_id\n", ret);
3449 return ERR_PTR(ret);
3450 }
3451 /*
3452 * Load up TCM subsystem plugins if they have not already been loaded.
3453 */
3454 transport_subsystem_check_init();
3455
3456 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3457 if (IS_ERR(hba))
3458 return ERR_CAST(hba);
3459
3460 config_group_init_type_name(&hba->hba_group, name,
3461 &target_core_hba_cit);
3462
3463 return &hba->hba_group;
3464 }
3465
3466 static void target_core_call_delhbafromtarget(
3467 struct config_group *group,
3468 struct config_item *item)
3469 {
3470 /*
3471 * core_delete_hba() is called from target_core_hba_item_ops->release()
3472 * -> target_core_hba_release()
3473 */
3474 config_item_put(item);
3475 }
3476
3477 static struct configfs_group_operations target_core_group_ops = {
3478 .make_group = target_core_call_addhbatotarget,
3479 .drop_item = target_core_call_delhbafromtarget,
3480 };
3481
3482 static const struct config_item_type target_core_cit = {
3483 .ct_item_ops = NULL,
3484 .ct_group_ops = &target_core_group_ops,
3485 .ct_attrs = NULL,
3486 .ct_owner = THIS_MODULE,
3487 };
3488
3489 /* Stop functions for struct config_item_type target_core_hba_cit */
3490
3491 void target_setup_backend_cits(struct target_backend *tb)
3492 {
3493 target_core_setup_dev_cit(tb);
3494 target_core_setup_dev_action_cit(tb);
3495 target_core_setup_dev_attrib_cit(tb);
3496 target_core_setup_dev_pr_cit(tb);
3497 target_core_setup_dev_wwn_cit(tb);
3498 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3499 target_core_setup_dev_stat_cit(tb);
3500 }
3501
3502 static void target_init_dbroot(void)
3503 {
3504 struct file *fp;
3505
3506 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3507 fp = filp_open(db_root_stage, O_RDONLY, 0);
3508 if (IS_ERR(fp)) {
3509 pr_err("db_root: cannot open: %s\n", db_root_stage);
3510 return;
3511 }
3512 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3513 filp_close(fp, NULL);
3514 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3515 return;
3516 }
3517 filp_close(fp, NULL);
3518
3519 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3520 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3521 }
3522
3523 static int __init target_core_init_configfs(void)
3524 {
3525 struct configfs_subsystem *subsys = &target_core_fabrics;
3526 struct t10_alua_lu_gp *lu_gp;
3527 int ret;
3528
3529 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3530 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3531 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3532
3533 config_group_init(&subsys->su_group);
3534 mutex_init(&subsys->su_mutex);
3535
3536 ret = init_se_kmem_caches();
3537 if (ret < 0)
3538 return ret;
3539 /*
3540 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3541 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3542 */
3543 config_group_init_type_name(&target_core_hbagroup, "core",
3544 &target_core_cit);
3545 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3546
3547 /*
3548 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3549 */
3550 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3551 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3552
3553 /*
3554 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3555 * groups under /sys/kernel/config/target/core/alua/
3556 */
3557 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3558 &target_core_alua_lu_gps_cit);
3559 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3560
3561 /*
3562 * Add core/alua/lu_gps/default_lu_gp
3563 */
3564 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3565 if (IS_ERR(lu_gp)) {
3566 ret = -ENOMEM;
3567 goto out_global;
3568 }
3569
3570 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3571 &target_core_alua_lu_gp_cit);
3572 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3573
3574 default_lu_gp = lu_gp;
3575
3576 /*
3577 * Register the target_core_mod subsystem with configfs.
3578 */
3579 ret = configfs_register_subsystem(subsys);
3580 if (ret < 0) {
3581 pr_err("Error %d while registering subsystem %s\n",
3582 ret, subsys->su_group.cg_item.ci_namebuf);
3583 goto out_global;
3584 }
3585 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3586 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3587 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3588 /*
3589 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3590 */
3591 ret = rd_module_init();
3592 if (ret < 0)
3593 goto out;
3594
3595 ret = core_dev_setup_virtual_lun0();
3596 if (ret < 0)
3597 goto out;
3598
3599 ret = target_xcopy_setup_pt();
3600 if (ret < 0)
3601 goto out;
3602
3603 target_init_dbroot();
3604
3605 return 0;
3606
3607 out:
3608 configfs_unregister_subsystem(subsys);
3609 core_dev_release_virtual_lun0();
3610 rd_module_exit();
3611 out_global:
3612 if (default_lu_gp) {
3613 core_alua_free_lu_gp(default_lu_gp);
3614 default_lu_gp = NULL;
3615 }
3616 release_se_kmem_caches();
3617 return ret;
3618 }
3619
3620 static void __exit target_core_exit_configfs(void)
3621 {
3622 configfs_remove_default_groups(&alua_lu_gps_group);
3623 configfs_remove_default_groups(&alua_group);
3624 configfs_remove_default_groups(&target_core_hbagroup);
3625
3626 /*
3627 * We expect subsys->su_group.default_groups to be released
3628 * by configfs subsystem provider logic..
3629 */
3630 configfs_unregister_subsystem(&target_core_fabrics);
3631
3632 core_alua_free_lu_gp(default_lu_gp);
3633 default_lu_gp = NULL;
3634
3635 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3636 " Infrastructure\n");
3637
3638 core_dev_release_virtual_lun0();
3639 rd_module_exit();
3640 target_xcopy_release_pt();
3641 release_se_kmem_caches();
3642 }
3643
3644 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3645 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3646 MODULE_LICENSE("GPL");
3647
3648 module_init(target_core_init_configfs);
3649 module_exit(target_core_exit_configfs);
Linux with added FPC-III support