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Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[mirror_ubuntu-jammy-kernel.git] / drivers / target / target_core_configfs.c
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 static ssize_t
1483 target_wwn_company_id_show(struct config_item *item,
1484 char *page)
1485 {
1486 return snprintf(page, PAGE_SIZE, "%#08x\n",
1487 to_t10_wwn(item)->company_id);
1488 }
1489
1490 static ssize_t
1491 target_wwn_company_id_store(struct config_item *item,
1492 const char *page, size_t count)
1493 {
1494 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1495 struct se_device *dev = t10_wwn->t10_dev;
1496 u32 val;
1497 int ret;
1498
1499 /*
1500 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1501 * form OUI assigned by the IEEE.
1502 */
1503 ret = kstrtou32(page, 0, &val);
1504 if (ret < 0)
1505 return ret;
1506
1507 if (val >= 0x1000000)
1508 return -EOVERFLOW;
1509
1510 /*
1511 * Check to see if any active exports exist. If they do exist, fail
1512 * here as changing this information on the fly (underneath the
1513 * initiator side OS dependent multipath code) could cause negative
1514 * effects.
1515 */
1516 if (dev->export_count) {
1517 pr_err("Unable to set Company ID while %u exports exist\n",
1518 dev->export_count);
1519 return -EINVAL;
1520 }
1521
1522 t10_wwn->company_id = val;
1523
1524 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1525 t10_wwn->company_id);
1526
1527 return count;
1528 }
1529
1530 /*
1531 * VPD page 0x80 Unit serial
1532 */
1533 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1534 char *page)
1535 {
1536 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1537 &to_t10_wwn(item)->unit_serial[0]);
1538 }
1539
1540 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1541 const char *page, size_t count)
1542 {
1543 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1544 struct se_device *dev = t10_wwn->t10_dev;
1545 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1546
1547 /*
1548 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1549 * from the struct scsi_device level firmware, do not allow
1550 * VPD Unit Serial to be emulated.
1551 *
1552 * Note this struct scsi_device could also be emulating VPD
1553 * information from its drivers/scsi LLD. But for now we assume
1554 * it is doing 'the right thing' wrt a world wide unique
1555 * VPD Unit Serial Number that OS dependent multipath can depend on.
1556 */
1557 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1558 pr_err("Underlying SCSI device firmware provided VPD"
1559 " Unit Serial, ignoring request\n");
1560 return -EOPNOTSUPP;
1561 }
1562
1563 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1564 pr_err("Emulated VPD Unit Serial exceeds"
1565 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1566 return -EOVERFLOW;
1567 }
1568 /*
1569 * Check to see if any active $FABRIC_MOD exports exist. If they
1570 * do exist, fail here as changing this information on the fly
1571 * (underneath the initiator side OS dependent multipath code)
1572 * could cause negative effects.
1573 */
1574 if (dev->export_count) {
1575 pr_err("Unable to set VPD Unit Serial while"
1576 " active %d $FABRIC_MOD exports exist\n",
1577 dev->export_count);
1578 return -EINVAL;
1579 }
1580
1581 /*
1582 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1583 *
1584 * Also, strip any newline added from the userspace
1585 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1586 */
1587 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1588 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1589 "%s", strstrip(buf));
1590 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1591
1592 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1593 " %s\n", dev->t10_wwn.unit_serial);
1594
1595 return count;
1596 }
1597
1598 /*
1599 * VPD page 0x83 Protocol Identifier
1600 */
1601 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1602 char *page)
1603 {
1604 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1605 struct t10_vpd *vpd;
1606 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1607 ssize_t len = 0;
1608
1609 spin_lock(&t10_wwn->t10_vpd_lock);
1610 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1611 if (!vpd->protocol_identifier_set)
1612 continue;
1613
1614 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1615
1616 if (len + strlen(buf) >= PAGE_SIZE)
1617 break;
1618
1619 len += sprintf(page+len, "%s", buf);
1620 }
1621 spin_unlock(&t10_wwn->t10_vpd_lock);
1622
1623 return len;
1624 }
1625
1626 /*
1627 * Generic wrapper for dumping VPD identifiers by association.
1628 */
1629 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1630 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1631 char *page) \
1632 { \
1633 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1634 struct t10_vpd *vpd; \
1635 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1636 ssize_t len = 0; \
1637 \
1638 spin_lock(&t10_wwn->t10_vpd_lock); \
1639 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1640 if (vpd->association != _assoc) \
1641 continue; \
1642 \
1643 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1644 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1645 if (len + strlen(buf) >= PAGE_SIZE) \
1646 break; \
1647 len += sprintf(page+len, "%s", buf); \
1648 \
1649 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1650 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1651 if (len + strlen(buf) >= PAGE_SIZE) \
1652 break; \
1653 len += sprintf(page+len, "%s", buf); \
1654 \
1655 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1656 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1657 if (len + strlen(buf) >= PAGE_SIZE) \
1658 break; \
1659 len += sprintf(page+len, "%s", buf); \
1660 } \
1661 spin_unlock(&t10_wwn->t10_vpd_lock); \
1662 \
1663 return len; \
1664 }
1665
1666 /* VPD page 0x83 Association: Logical Unit */
1667 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1668 /* VPD page 0x83 Association: Target Port */
1669 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1670 /* VPD page 0x83 Association: SCSI Target Device */
1671 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1672
1673 CONFIGFS_ATTR(target_wwn_, vendor_id);
1674 CONFIGFS_ATTR(target_wwn_, product_id);
1675 CONFIGFS_ATTR(target_wwn_, revision);
1676 CONFIGFS_ATTR(target_wwn_, company_id);
1677 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1678 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1679 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1680 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1681 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1682
1683 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1684 &target_wwn_attr_vendor_id,
1685 &target_wwn_attr_product_id,
1686 &target_wwn_attr_revision,
1687 &target_wwn_attr_company_id,
1688 &target_wwn_attr_vpd_unit_serial,
1689 &target_wwn_attr_vpd_protocol_identifier,
1690 &target_wwn_attr_vpd_assoc_logical_unit,
1691 &target_wwn_attr_vpd_assoc_target_port,
1692 &target_wwn_attr_vpd_assoc_scsi_target_device,
1693 NULL,
1694 };
1695
1696 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1697
1698 /* End functions for struct config_item_type tb_dev_wwn_cit */
1699
1700 /* Start functions for struct config_item_type tb_dev_pr_cit */
1701
1702 static struct se_device *pr_to_dev(struct config_item *item)
1703 {
1704 return container_of(to_config_group(item), struct se_device,
1705 dev_pr_group);
1706 }
1707
1708 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1709 char *page)
1710 {
1711 struct se_node_acl *se_nacl;
1712 struct t10_pr_registration *pr_reg;
1713 char i_buf[PR_REG_ISID_ID_LEN] = { };
1714
1715 pr_reg = dev->dev_pr_res_holder;
1716 if (!pr_reg)
1717 return sprintf(page, "No SPC-3 Reservation holder\n");
1718
1719 se_nacl = pr_reg->pr_reg_nacl;
1720 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1721
1722 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1723 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1724 se_nacl->initiatorname, i_buf);
1725 }
1726
1727 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1728 char *page)
1729 {
1730 struct se_session *sess = dev->reservation_holder;
1731 struct se_node_acl *se_nacl;
1732 ssize_t len;
1733
1734 if (sess) {
1735 se_nacl = sess->se_node_acl;
1736 len = sprintf(page,
1737 "SPC-2 Reservation: %s Initiator: %s\n",
1738 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1739 se_nacl->initiatorname);
1740 } else {
1741 len = sprintf(page, "No SPC-2 Reservation holder\n");
1742 }
1743 return len;
1744 }
1745
1746 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1747 {
1748 struct se_device *dev = pr_to_dev(item);
1749 int ret;
1750
1751 if (!dev->dev_attrib.emulate_pr)
1752 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1753
1754 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1755 return sprintf(page, "Passthrough\n");
1756
1757 spin_lock(&dev->dev_reservation_lock);
1758 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1759 ret = target_core_dev_pr_show_spc2_res(dev, page);
1760 else
1761 ret = target_core_dev_pr_show_spc3_res(dev, page);
1762 spin_unlock(&dev->dev_reservation_lock);
1763 return ret;
1764 }
1765
1766 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1767 char *page)
1768 {
1769 struct se_device *dev = pr_to_dev(item);
1770 ssize_t len = 0;
1771
1772 spin_lock(&dev->dev_reservation_lock);
1773 if (!dev->dev_pr_res_holder) {
1774 len = sprintf(page, "No SPC-3 Reservation holder\n");
1775 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1776 len = sprintf(page, "SPC-3 Reservation: All Target"
1777 " Ports registration\n");
1778 } else {
1779 len = sprintf(page, "SPC-3 Reservation: Single"
1780 " Target Port registration\n");
1781 }
1782
1783 spin_unlock(&dev->dev_reservation_lock);
1784 return len;
1785 }
1786
1787 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1788 char *page)
1789 {
1790 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1791 }
1792
1793
1794 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1795 char *page)
1796 {
1797 struct se_device *dev = pr_to_dev(item);
1798 struct se_node_acl *se_nacl;
1799 struct se_portal_group *se_tpg;
1800 struct t10_pr_registration *pr_reg;
1801 const struct target_core_fabric_ops *tfo;
1802 ssize_t len = 0;
1803
1804 spin_lock(&dev->dev_reservation_lock);
1805 pr_reg = dev->dev_pr_res_holder;
1806 if (!pr_reg) {
1807 len = sprintf(page, "No SPC-3 Reservation holder\n");
1808 goto out_unlock;
1809 }
1810
1811 se_nacl = pr_reg->pr_reg_nacl;
1812 se_tpg = se_nacl->se_tpg;
1813 tfo = se_tpg->se_tpg_tfo;
1814
1815 len += sprintf(page+len, "SPC-3 Reservation: %s"
1816 " Target Node Endpoint: %s\n", tfo->fabric_name,
1817 tfo->tpg_get_wwn(se_tpg));
1818 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1819 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1820 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1821 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1822 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1823
1824 out_unlock:
1825 spin_unlock(&dev->dev_reservation_lock);
1826 return len;
1827 }
1828
1829
1830 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1831 char *page)
1832 {
1833 struct se_device *dev = pr_to_dev(item);
1834 const struct target_core_fabric_ops *tfo;
1835 struct t10_pr_registration *pr_reg;
1836 unsigned char buf[384];
1837 char i_buf[PR_REG_ISID_ID_LEN];
1838 ssize_t len = 0;
1839 int reg_count = 0;
1840
1841 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1842
1843 spin_lock(&dev->t10_pr.registration_lock);
1844 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1845 pr_reg_list) {
1846
1847 memset(buf, 0, 384);
1848 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1849 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1850 core_pr_dump_initiator_port(pr_reg, i_buf,
1851 PR_REG_ISID_ID_LEN);
1852 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1853 tfo->fabric_name,
1854 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1855 pr_reg->pr_res_generation);
1856
1857 if (len + strlen(buf) >= PAGE_SIZE)
1858 break;
1859
1860 len += sprintf(page+len, "%s", buf);
1861 reg_count++;
1862 }
1863 spin_unlock(&dev->t10_pr.registration_lock);
1864
1865 if (!reg_count)
1866 len += sprintf(page+len, "None\n");
1867
1868 return len;
1869 }
1870
1871 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1872 {
1873 struct se_device *dev = pr_to_dev(item);
1874 struct t10_pr_registration *pr_reg;
1875 ssize_t len = 0;
1876
1877 spin_lock(&dev->dev_reservation_lock);
1878 pr_reg = dev->dev_pr_res_holder;
1879 if (pr_reg) {
1880 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1881 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1882 } else {
1883 len = sprintf(page, "No SPC-3 Reservation holder\n");
1884 }
1885
1886 spin_unlock(&dev->dev_reservation_lock);
1887 return len;
1888 }
1889
1890 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1891 {
1892 struct se_device *dev = pr_to_dev(item);
1893
1894 if (!dev->dev_attrib.emulate_pr)
1895 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1896 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1897 return sprintf(page, "SPC_PASSTHROUGH\n");
1898 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1899 return sprintf(page, "SPC2_RESERVATIONS\n");
1900
1901 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1902 }
1903
1904 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1905 char *page)
1906 {
1907 struct se_device *dev = pr_to_dev(item);
1908
1909 if (!dev->dev_attrib.emulate_pr ||
1910 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1911 return 0;
1912
1913 return sprintf(page, "APTPL Bit Status: %s\n",
1914 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1915 }
1916
1917 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1918 char *page)
1919 {
1920 struct se_device *dev = pr_to_dev(item);
1921
1922 if (!dev->dev_attrib.emulate_pr ||
1923 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1924 return 0;
1925
1926 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1927 }
1928
1929 enum {
1930 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1931 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1932 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1933 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1934 };
1935
1936 static match_table_t tokens = {
1937 {Opt_initiator_fabric, "initiator_fabric=%s"},
1938 {Opt_initiator_node, "initiator_node=%s"},
1939 {Opt_initiator_sid, "initiator_sid=%s"},
1940 {Opt_sa_res_key, "sa_res_key=%s"},
1941 {Opt_res_holder, "res_holder=%d"},
1942 {Opt_res_type, "res_type=%d"},
1943 {Opt_res_scope, "res_scope=%d"},
1944 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1945 {Opt_mapped_lun, "mapped_lun=%u"},
1946 {Opt_target_fabric, "target_fabric=%s"},
1947 {Opt_target_node, "target_node=%s"},
1948 {Opt_tpgt, "tpgt=%d"},
1949 {Opt_port_rtpi, "port_rtpi=%d"},
1950 {Opt_target_lun, "target_lun=%u"},
1951 {Opt_err, NULL}
1952 };
1953
1954 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1955 const char *page, size_t count)
1956 {
1957 struct se_device *dev = pr_to_dev(item);
1958 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1959 unsigned char *t_fabric = NULL, *t_port = NULL;
1960 char *orig, *ptr, *opts;
1961 substring_t args[MAX_OPT_ARGS];
1962 unsigned long long tmp_ll;
1963 u64 sa_res_key = 0;
1964 u64 mapped_lun = 0, target_lun = 0;
1965 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1966 u16 tpgt = 0;
1967 u8 type = 0;
1968
1969 if (!dev->dev_attrib.emulate_pr ||
1970 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1971 return count;
1972 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1973 return count;
1974
1975 if (dev->export_count) {
1976 pr_debug("Unable to process APTPL metadata while"
1977 " active fabric exports exist\n");
1978 return -EINVAL;
1979 }
1980
1981 opts = kstrdup(page, GFP_KERNEL);
1982 if (!opts)
1983 return -ENOMEM;
1984
1985 orig = opts;
1986 while ((ptr = strsep(&opts, ",\n")) != NULL) {
1987 if (!*ptr)
1988 continue;
1989
1990 token = match_token(ptr, tokens, args);
1991 switch (token) {
1992 case Opt_initiator_fabric:
1993 i_fabric = match_strdup(args);
1994 if (!i_fabric) {
1995 ret = -ENOMEM;
1996 goto out;
1997 }
1998 break;
1999 case Opt_initiator_node:
2000 i_port = match_strdup(args);
2001 if (!i_port) {
2002 ret = -ENOMEM;
2003 goto out;
2004 }
2005 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2006 pr_err("APTPL metadata initiator_node="
2007 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2008 PR_APTPL_MAX_IPORT_LEN);
2009 ret = -EINVAL;
2010 break;
2011 }
2012 break;
2013 case Opt_initiator_sid:
2014 isid = match_strdup(args);
2015 if (!isid) {
2016 ret = -ENOMEM;
2017 goto out;
2018 }
2019 if (strlen(isid) >= PR_REG_ISID_LEN) {
2020 pr_err("APTPL metadata initiator_isid"
2021 "= exceeds PR_REG_ISID_LEN: %d\n",
2022 PR_REG_ISID_LEN);
2023 ret = -EINVAL;
2024 break;
2025 }
2026 break;
2027 case Opt_sa_res_key:
2028 ret = match_u64(args, &tmp_ll);
2029 if (ret < 0) {
2030 pr_err("kstrtoull() failed for sa_res_key=\n");
2031 goto out;
2032 }
2033 sa_res_key = (u64)tmp_ll;
2034 break;
2035 /*
2036 * PR APTPL Metadata for Reservation
2037 */
2038 case Opt_res_holder:
2039 ret = match_int(args, &arg);
2040 if (ret)
2041 goto out;
2042 res_holder = arg;
2043 break;
2044 case Opt_res_type:
2045 ret = match_int(args, &arg);
2046 if (ret)
2047 goto out;
2048 type = (u8)arg;
2049 break;
2050 case Opt_res_scope:
2051 ret = match_int(args, &arg);
2052 if (ret)
2053 goto out;
2054 break;
2055 case Opt_res_all_tg_pt:
2056 ret = match_int(args, &arg);
2057 if (ret)
2058 goto out;
2059 all_tg_pt = (int)arg;
2060 break;
2061 case Opt_mapped_lun:
2062 ret = match_u64(args, &tmp_ll);
2063 if (ret)
2064 goto out;
2065 mapped_lun = (u64)tmp_ll;
2066 break;
2067 /*
2068 * PR APTPL Metadata for Target Port
2069 */
2070 case Opt_target_fabric:
2071 t_fabric = match_strdup(args);
2072 if (!t_fabric) {
2073 ret = -ENOMEM;
2074 goto out;
2075 }
2076 break;
2077 case Opt_target_node:
2078 t_port = match_strdup(args);
2079 if (!t_port) {
2080 ret = -ENOMEM;
2081 goto out;
2082 }
2083 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2084 pr_err("APTPL metadata target_node="
2085 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2086 PR_APTPL_MAX_TPORT_LEN);
2087 ret = -EINVAL;
2088 break;
2089 }
2090 break;
2091 case Opt_tpgt:
2092 ret = match_int(args, &arg);
2093 if (ret)
2094 goto out;
2095 tpgt = (u16)arg;
2096 break;
2097 case Opt_port_rtpi:
2098 ret = match_int(args, &arg);
2099 if (ret)
2100 goto out;
2101 break;
2102 case Opt_target_lun:
2103 ret = match_u64(args, &tmp_ll);
2104 if (ret)
2105 goto out;
2106 target_lun = (u64)tmp_ll;
2107 break;
2108 default:
2109 break;
2110 }
2111 }
2112
2113 if (!i_port || !t_port || !sa_res_key) {
2114 pr_err("Illegal parameters for APTPL registration\n");
2115 ret = -EINVAL;
2116 goto out;
2117 }
2118
2119 if (res_holder && !(type)) {
2120 pr_err("Illegal PR type: 0x%02x for reservation"
2121 " holder\n", type);
2122 ret = -EINVAL;
2123 goto out;
2124 }
2125
2126 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2127 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2128 res_holder, all_tg_pt, type);
2129 out:
2130 kfree(i_fabric);
2131 kfree(i_port);
2132 kfree(isid);
2133 kfree(t_fabric);
2134 kfree(t_port);
2135 kfree(orig);
2136 return (ret == 0) ? count : ret;
2137 }
2138
2139
2140 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2141 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2142 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2143 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2144 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2145 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2146 CONFIGFS_ATTR_RO(target_pr_, res_type);
2147 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2148 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2149
2150 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2151 &target_pr_attr_res_holder,
2152 &target_pr_attr_res_pr_all_tgt_pts,
2153 &target_pr_attr_res_pr_generation,
2154 &target_pr_attr_res_pr_holder_tg_port,
2155 &target_pr_attr_res_pr_registered_i_pts,
2156 &target_pr_attr_res_pr_type,
2157 &target_pr_attr_res_type,
2158 &target_pr_attr_res_aptpl_active,
2159 &target_pr_attr_res_aptpl_metadata,
2160 NULL,
2161 };
2162
2163 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2164
2165 /* End functions for struct config_item_type tb_dev_pr_cit */
2166
2167 /* Start functions for struct config_item_type tb_dev_cit */
2168
2169 static inline struct se_device *to_device(struct config_item *item)
2170 {
2171 return container_of(to_config_group(item), struct se_device, dev_group);
2172 }
2173
2174 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2175 {
2176 struct se_device *dev = to_device(item);
2177 int bl = 0;
2178 ssize_t read_bytes = 0;
2179
2180 transport_dump_dev_state(dev, page, &bl);
2181 read_bytes += bl;
2182 read_bytes += dev->transport->show_configfs_dev_params(dev,
2183 page+read_bytes);
2184 return read_bytes;
2185 }
2186
2187 static ssize_t target_dev_control_store(struct config_item *item,
2188 const char *page, size_t count)
2189 {
2190 struct se_device *dev = to_device(item);
2191
2192 return dev->transport->set_configfs_dev_params(dev, page, count);
2193 }
2194
2195 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2196 {
2197 struct se_device *dev = to_device(item);
2198
2199 if (!(dev->dev_flags & DF_USING_ALIAS))
2200 return 0;
2201
2202 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2203 }
2204
2205 static ssize_t target_dev_alias_store(struct config_item *item,
2206 const char *page, size_t count)
2207 {
2208 struct se_device *dev = to_device(item);
2209 struct se_hba *hba = dev->se_hba;
2210 ssize_t read_bytes;
2211
2212 if (count > (SE_DEV_ALIAS_LEN-1)) {
2213 pr_err("alias count: %d exceeds"
2214 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2215 SE_DEV_ALIAS_LEN-1);
2216 return -EINVAL;
2217 }
2218
2219 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2220 if (!read_bytes)
2221 return -EINVAL;
2222 if (dev->dev_alias[read_bytes - 1] == '\n')
2223 dev->dev_alias[read_bytes - 1] = '\0';
2224
2225 dev->dev_flags |= DF_USING_ALIAS;
2226
2227 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2228 config_item_name(&hba->hba_group.cg_item),
2229 config_item_name(&dev->dev_group.cg_item),
2230 dev->dev_alias);
2231
2232 return read_bytes;
2233 }
2234
2235 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2236 {
2237 struct se_device *dev = to_device(item);
2238
2239 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2240 return 0;
2241
2242 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2243 }
2244
2245 static ssize_t target_dev_udev_path_store(struct config_item *item,
2246 const char *page, size_t count)
2247 {
2248 struct se_device *dev = to_device(item);
2249 struct se_hba *hba = dev->se_hba;
2250 ssize_t read_bytes;
2251
2252 if (count > (SE_UDEV_PATH_LEN-1)) {
2253 pr_err("udev_path count: %d exceeds"
2254 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2255 SE_UDEV_PATH_LEN-1);
2256 return -EINVAL;
2257 }
2258
2259 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2260 "%s", page);
2261 if (!read_bytes)
2262 return -EINVAL;
2263 if (dev->udev_path[read_bytes - 1] == '\n')
2264 dev->udev_path[read_bytes - 1] = '\0';
2265
2266 dev->dev_flags |= DF_USING_UDEV_PATH;
2267
2268 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2269 config_item_name(&hba->hba_group.cg_item),
2270 config_item_name(&dev->dev_group.cg_item),
2271 dev->udev_path);
2272
2273 return read_bytes;
2274 }
2275
2276 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2277 {
2278 struct se_device *dev = to_device(item);
2279
2280 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2281 }
2282
2283 static ssize_t target_dev_enable_store(struct config_item *item,
2284 const char *page, size_t count)
2285 {
2286 struct se_device *dev = to_device(item);
2287 char *ptr;
2288 int ret;
2289
2290 ptr = strstr(page, "1");
2291 if (!ptr) {
2292 pr_err("For dev_enable ops, only valid value"
2293 " is \"1\"\n");
2294 return -EINVAL;
2295 }
2296
2297 ret = target_configure_device(dev);
2298 if (ret)
2299 return ret;
2300 return count;
2301 }
2302
2303 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2304 {
2305 struct se_device *dev = to_device(item);
2306 struct config_item *lu_ci;
2307 struct t10_alua_lu_gp *lu_gp;
2308 struct t10_alua_lu_gp_member *lu_gp_mem;
2309 ssize_t len = 0;
2310
2311 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2312 if (!lu_gp_mem)
2313 return 0;
2314
2315 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2316 lu_gp = lu_gp_mem->lu_gp;
2317 if (lu_gp) {
2318 lu_ci = &lu_gp->lu_gp_group.cg_item;
2319 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2320 config_item_name(lu_ci), lu_gp->lu_gp_id);
2321 }
2322 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2323
2324 return len;
2325 }
2326
2327 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2328 const char *page, size_t count)
2329 {
2330 struct se_device *dev = to_device(item);
2331 struct se_hba *hba = dev->se_hba;
2332 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2333 struct t10_alua_lu_gp_member *lu_gp_mem;
2334 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2335 int move = 0;
2336
2337 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2338 if (!lu_gp_mem)
2339 return count;
2340
2341 if (count > LU_GROUP_NAME_BUF) {
2342 pr_err("ALUA LU Group Alias too large!\n");
2343 return -EINVAL;
2344 }
2345 memcpy(buf, page, count);
2346 /*
2347 * Any ALUA logical unit alias besides "NULL" means we will be
2348 * making a new group association.
2349 */
2350 if (strcmp(strstrip(buf), "NULL")) {
2351 /*
2352 * core_alua_get_lu_gp_by_name() will increment reference to
2353 * struct t10_alua_lu_gp. This reference is released with
2354 * core_alua_get_lu_gp_by_name below().
2355 */
2356 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2357 if (!lu_gp_new)
2358 return -ENODEV;
2359 }
2360
2361 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2362 lu_gp = lu_gp_mem->lu_gp;
2363 if (lu_gp) {
2364 /*
2365 * Clearing an existing lu_gp association, and replacing
2366 * with NULL
2367 */
2368 if (!lu_gp_new) {
2369 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2370 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2371 " %hu\n",
2372 config_item_name(&hba->hba_group.cg_item),
2373 config_item_name(&dev->dev_group.cg_item),
2374 config_item_name(&lu_gp->lu_gp_group.cg_item),
2375 lu_gp->lu_gp_id);
2376
2377 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2378 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2379
2380 return count;
2381 }
2382 /*
2383 * Removing existing association of lu_gp_mem with lu_gp
2384 */
2385 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2386 move = 1;
2387 }
2388 /*
2389 * Associate lu_gp_mem with lu_gp_new.
2390 */
2391 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2392 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2393
2394 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2395 " core/alua/lu_gps/%s, ID: %hu\n",
2396 (move) ? "Moving" : "Adding",
2397 config_item_name(&hba->hba_group.cg_item),
2398 config_item_name(&dev->dev_group.cg_item),
2399 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2400 lu_gp_new->lu_gp_id);
2401
2402 core_alua_put_lu_gp_from_name(lu_gp_new);
2403 return count;
2404 }
2405
2406 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2407 {
2408 struct se_device *dev = to_device(item);
2409 struct t10_alua_lba_map *map;
2410 struct t10_alua_lba_map_member *mem;
2411 char *b = page;
2412 int bl = 0;
2413 char state;
2414
2415 spin_lock(&dev->t10_alua.lba_map_lock);
2416 if (!list_empty(&dev->t10_alua.lba_map_list))
2417 bl += sprintf(b + bl, "%u %u\n",
2418 dev->t10_alua.lba_map_segment_size,
2419 dev->t10_alua.lba_map_segment_multiplier);
2420 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2421 bl += sprintf(b + bl, "%llu %llu",
2422 map->lba_map_first_lba, map->lba_map_last_lba);
2423 list_for_each_entry(mem, &map->lba_map_mem_list,
2424 lba_map_mem_list) {
2425 switch (mem->lba_map_mem_alua_state) {
2426 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2427 state = 'O';
2428 break;
2429 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2430 state = 'A';
2431 break;
2432 case ALUA_ACCESS_STATE_STANDBY:
2433 state = 'S';
2434 break;
2435 case ALUA_ACCESS_STATE_UNAVAILABLE:
2436 state = 'U';
2437 break;
2438 default:
2439 state = '.';
2440 break;
2441 }
2442 bl += sprintf(b + bl, " %d:%c",
2443 mem->lba_map_mem_alua_pg_id, state);
2444 }
2445 bl += sprintf(b + bl, "\n");
2446 }
2447 spin_unlock(&dev->t10_alua.lba_map_lock);
2448 return bl;
2449 }
2450
2451 static ssize_t target_dev_lba_map_store(struct config_item *item,
2452 const char *page, size_t count)
2453 {
2454 struct se_device *dev = to_device(item);
2455 struct t10_alua_lba_map *lba_map = NULL;
2456 struct list_head lba_list;
2457 char *map_entries, *orig, *ptr;
2458 char state;
2459 int pg_num = -1, pg;
2460 int ret = 0, num = 0, pg_id, alua_state;
2461 unsigned long start_lba = -1, end_lba = -1;
2462 unsigned long segment_size = -1, segment_mult = -1;
2463
2464 orig = map_entries = kstrdup(page, GFP_KERNEL);
2465 if (!map_entries)
2466 return -ENOMEM;
2467
2468 INIT_LIST_HEAD(&lba_list);
2469 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2470 if (!*ptr)
2471 continue;
2472
2473 if (num == 0) {
2474 if (sscanf(ptr, "%lu %lu\n",
2475 &segment_size, &segment_mult) != 2) {
2476 pr_err("Invalid line %d\n", num);
2477 ret = -EINVAL;
2478 break;
2479 }
2480 num++;
2481 continue;
2482 }
2483 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2484 pr_err("Invalid line %d\n", num);
2485 ret = -EINVAL;
2486 break;
2487 }
2488 ptr = strchr(ptr, ' ');
2489 if (!ptr) {
2490 pr_err("Invalid line %d, missing end lba\n", num);
2491 ret = -EINVAL;
2492 break;
2493 }
2494 ptr++;
2495 ptr = strchr(ptr, ' ');
2496 if (!ptr) {
2497 pr_err("Invalid line %d, missing state definitions\n",
2498 num);
2499 ret = -EINVAL;
2500 break;
2501 }
2502 ptr++;
2503 lba_map = core_alua_allocate_lba_map(&lba_list,
2504 start_lba, end_lba);
2505 if (IS_ERR(lba_map)) {
2506 ret = PTR_ERR(lba_map);
2507 break;
2508 }
2509 pg = 0;
2510 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2511 switch (state) {
2512 case 'O':
2513 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2514 break;
2515 case 'A':
2516 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2517 break;
2518 case 'S':
2519 alua_state = ALUA_ACCESS_STATE_STANDBY;
2520 break;
2521 case 'U':
2522 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2523 break;
2524 default:
2525 pr_err("Invalid ALUA state '%c'\n", state);
2526 ret = -EINVAL;
2527 goto out;
2528 }
2529
2530 ret = core_alua_allocate_lba_map_mem(lba_map,
2531 pg_id, alua_state);
2532 if (ret) {
2533 pr_err("Invalid target descriptor %d:%c "
2534 "at line %d\n",
2535 pg_id, state, num);
2536 break;
2537 }
2538 pg++;
2539 ptr = strchr(ptr, ' ');
2540 if (ptr)
2541 ptr++;
2542 else
2543 break;
2544 }
2545 if (pg_num == -1)
2546 pg_num = pg;
2547 else if (pg != pg_num) {
2548 pr_err("Only %d from %d port groups definitions "
2549 "at line %d\n", pg, pg_num, num);
2550 ret = -EINVAL;
2551 break;
2552 }
2553 num++;
2554 }
2555 out:
2556 if (ret) {
2557 core_alua_free_lba_map(&lba_list);
2558 count = ret;
2559 } else
2560 core_alua_set_lba_map(dev, &lba_list,
2561 segment_size, segment_mult);
2562 kfree(orig);
2563 return count;
2564 }
2565
2566 CONFIGFS_ATTR_RO(target_dev_, info);
2567 CONFIGFS_ATTR_WO(target_dev_, control);
2568 CONFIGFS_ATTR(target_dev_, alias);
2569 CONFIGFS_ATTR(target_dev_, udev_path);
2570 CONFIGFS_ATTR(target_dev_, enable);
2571 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2572 CONFIGFS_ATTR(target_dev_, lba_map);
2573
2574 static struct configfs_attribute *target_core_dev_attrs[] = {
2575 &target_dev_attr_info,
2576 &target_dev_attr_control,
2577 &target_dev_attr_alias,
2578 &target_dev_attr_udev_path,
2579 &target_dev_attr_enable,
2580 &target_dev_attr_alua_lu_gp,
2581 &target_dev_attr_lba_map,
2582 NULL,
2583 };
2584
2585 static void target_core_dev_release(struct config_item *item)
2586 {
2587 struct config_group *dev_cg = to_config_group(item);
2588 struct se_device *dev =
2589 container_of(dev_cg, struct se_device, dev_group);
2590
2591 target_free_device(dev);
2592 }
2593
2594 /*
2595 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2596 * within target_fabric_port_link()
2597 */
2598 struct configfs_item_operations target_core_dev_item_ops = {
2599 .release = target_core_dev_release,
2600 };
2601
2602 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2603
2604 /* End functions for struct config_item_type tb_dev_cit */
2605
2606 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2607
2608 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2609 {
2610 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2611 lu_gp_group);
2612 }
2613
2614 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2615 {
2616 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2617
2618 if (!lu_gp->lu_gp_valid_id)
2619 return 0;
2620 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2621 }
2622
2623 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2624 const char *page, size_t count)
2625 {
2626 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2627 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2628 unsigned long lu_gp_id;
2629 int ret;
2630
2631 ret = kstrtoul(page, 0, &lu_gp_id);
2632 if (ret < 0) {
2633 pr_err("kstrtoul() returned %d for"
2634 " lu_gp_id\n", ret);
2635 return ret;
2636 }
2637 if (lu_gp_id > 0x0000ffff) {
2638 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2639 " 0x0000ffff\n", lu_gp_id);
2640 return -EINVAL;
2641 }
2642
2643 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2644 if (ret < 0)
2645 return -EINVAL;
2646
2647 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2648 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2649 config_item_name(&alua_lu_gp_cg->cg_item),
2650 lu_gp->lu_gp_id);
2651
2652 return count;
2653 }
2654
2655 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2656 {
2657 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2658 struct se_device *dev;
2659 struct se_hba *hba;
2660 struct t10_alua_lu_gp_member *lu_gp_mem;
2661 ssize_t len = 0, cur_len;
2662 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2663
2664 spin_lock(&lu_gp->lu_gp_lock);
2665 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2666 dev = lu_gp_mem->lu_gp_mem_dev;
2667 hba = dev->se_hba;
2668
2669 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2670 config_item_name(&hba->hba_group.cg_item),
2671 config_item_name(&dev->dev_group.cg_item));
2672 cur_len++; /* Extra byte for NULL terminator */
2673
2674 if ((cur_len + len) > PAGE_SIZE) {
2675 pr_warn("Ran out of lu_gp_show_attr"
2676 "_members buffer\n");
2677 break;
2678 }
2679 memcpy(page+len, buf, cur_len);
2680 len += cur_len;
2681 }
2682 spin_unlock(&lu_gp->lu_gp_lock);
2683
2684 return len;
2685 }
2686
2687 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2688 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2689
2690 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2691 &target_lu_gp_attr_lu_gp_id,
2692 &target_lu_gp_attr_members,
2693 NULL,
2694 };
2695
2696 static void target_core_alua_lu_gp_release(struct config_item *item)
2697 {
2698 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2699 struct t10_alua_lu_gp, lu_gp_group);
2700
2701 core_alua_free_lu_gp(lu_gp);
2702 }
2703
2704 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2705 .release = target_core_alua_lu_gp_release,
2706 };
2707
2708 static const struct config_item_type target_core_alua_lu_gp_cit = {
2709 .ct_item_ops = &target_core_alua_lu_gp_ops,
2710 .ct_attrs = target_core_alua_lu_gp_attrs,
2711 .ct_owner = THIS_MODULE,
2712 };
2713
2714 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2715
2716 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2717
2718 static struct config_group *target_core_alua_create_lu_gp(
2719 struct config_group *group,
2720 const char *name)
2721 {
2722 struct t10_alua_lu_gp *lu_gp;
2723 struct config_group *alua_lu_gp_cg = NULL;
2724 struct config_item *alua_lu_gp_ci = NULL;
2725
2726 lu_gp = core_alua_allocate_lu_gp(name, 0);
2727 if (IS_ERR(lu_gp))
2728 return NULL;
2729
2730 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2731 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2732
2733 config_group_init_type_name(alua_lu_gp_cg, name,
2734 &target_core_alua_lu_gp_cit);
2735
2736 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2737 " Group: core/alua/lu_gps/%s\n",
2738 config_item_name(alua_lu_gp_ci));
2739
2740 return alua_lu_gp_cg;
2741
2742 }
2743
2744 static void target_core_alua_drop_lu_gp(
2745 struct config_group *group,
2746 struct config_item *item)
2747 {
2748 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2749 struct t10_alua_lu_gp, lu_gp_group);
2750
2751 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2752 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2753 config_item_name(item), lu_gp->lu_gp_id);
2754 /*
2755 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2756 * -> target_core_alua_lu_gp_release()
2757 */
2758 config_item_put(item);
2759 }
2760
2761 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2762 .make_group = &target_core_alua_create_lu_gp,
2763 .drop_item = &target_core_alua_drop_lu_gp,
2764 };
2765
2766 static const struct config_item_type target_core_alua_lu_gps_cit = {
2767 .ct_item_ops = NULL,
2768 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2769 .ct_owner = THIS_MODULE,
2770 };
2771
2772 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2773
2774 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2775
2776 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2777 {
2778 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2779 tg_pt_gp_group);
2780 }
2781
2782 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2783 char *page)
2784 {
2785 return sprintf(page, "%d\n",
2786 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2787 }
2788
2789 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2790 const char *page, size_t count)
2791 {
2792 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2793 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2794 unsigned long tmp;
2795 int new_state, ret;
2796
2797 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2798 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2799 return -EINVAL;
2800 }
2801 if (!target_dev_configured(dev)) {
2802 pr_err("Unable to set alua_access_state while device is"
2803 " not configured\n");
2804 return -ENODEV;
2805 }
2806
2807 ret = kstrtoul(page, 0, &tmp);
2808 if (ret < 0) {
2809 pr_err("Unable to extract new ALUA access state from"
2810 " %s\n", page);
2811 return ret;
2812 }
2813 new_state = (int)tmp;
2814
2815 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2816 pr_err("Unable to process implicit configfs ALUA"
2817 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2818 return -EINVAL;
2819 }
2820 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2821 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2822 /* LBA DEPENDENT is only allowed with implicit ALUA */
2823 pr_err("Unable to process implicit configfs ALUA transition"
2824 " while explicit ALUA management is enabled\n");
2825 return -EINVAL;
2826 }
2827
2828 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2829 NULL, NULL, new_state, 0);
2830 return (!ret) ? count : -EINVAL;
2831 }
2832
2833 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2834 char *page)
2835 {
2836 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2837 return sprintf(page, "%s\n",
2838 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2839 }
2840
2841 static ssize_t target_tg_pt_gp_alua_access_status_store(
2842 struct config_item *item, const char *page, size_t count)
2843 {
2844 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2845 unsigned long tmp;
2846 int new_status, ret;
2847
2848 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2849 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2850 return -EINVAL;
2851 }
2852
2853 ret = kstrtoul(page, 0, &tmp);
2854 if (ret < 0) {
2855 pr_err("Unable to extract new ALUA access status"
2856 " from %s\n", page);
2857 return ret;
2858 }
2859 new_status = (int)tmp;
2860
2861 if ((new_status != ALUA_STATUS_NONE) &&
2862 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2863 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2864 pr_err("Illegal ALUA access status: 0x%02x\n",
2865 new_status);
2866 return -EINVAL;
2867 }
2868
2869 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2870 return count;
2871 }
2872
2873 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2874 char *page)
2875 {
2876 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2877 }
2878
2879 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2880 const char *page, size_t count)
2881 {
2882 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2883 }
2884
2885 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2886 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2887 struct config_item *item, char *p) \
2888 { \
2889 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2890 return sprintf(p, "%d\n", \
2891 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2892 } \
2893 \
2894 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2895 struct config_item *item, const char *p, size_t c) \
2896 { \
2897 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2898 unsigned long tmp; \
2899 int ret; \
2900 \
2901 if (!t->tg_pt_gp_valid_id) { \
2902 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2903 return -EINVAL; \
2904 } \
2905 \
2906 ret = kstrtoul(p, 0, &tmp); \
2907 if (ret < 0) { \
2908 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2909 return -EINVAL; \
2910 } \
2911 if (tmp > 1) { \
2912 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2913 return -EINVAL; \
2914 } \
2915 if (tmp) \
2916 t->tg_pt_gp_alua_supported_states |= _bit; \
2917 else \
2918 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2919 \
2920 return c; \
2921 }
2922
2923 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2924 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2925 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2926 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2927 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2928 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2929 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2930
2931 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2932 struct config_item *item, char *page)
2933 {
2934 return sprintf(page, "%d\n",
2935 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2936 }
2937
2938 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2939 struct config_item *item, const char *page, size_t count)
2940 {
2941 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2942 unsigned long tmp;
2943 int ret;
2944
2945 ret = kstrtoul(page, 0, &tmp);
2946 if (ret < 0) {
2947 pr_err("Unable to extract alua_write_metadata\n");
2948 return ret;
2949 }
2950
2951 if ((tmp != 0) && (tmp != 1)) {
2952 pr_err("Illegal value for alua_write_metadata:"
2953 " %lu\n", tmp);
2954 return -EINVAL;
2955 }
2956 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2957
2958 return count;
2959 }
2960
2961 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2962 char *page)
2963 {
2964 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2965 }
2966
2967 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2968 const char *page, size_t count)
2969 {
2970 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2971 count);
2972 }
2973
2974 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2975 char *page)
2976 {
2977 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2978 }
2979
2980 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
2981 const char *page, size_t count)
2982 {
2983 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
2984 count);
2985 }
2986
2987 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
2988 struct config_item *item, char *page)
2989 {
2990 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
2991 }
2992
2993 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
2994 struct config_item *item, const char *page, size_t count)
2995 {
2996 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
2997 count);
2998 }
2999
3000 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3001 char *page)
3002 {
3003 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3004 }
3005
3006 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3007 const char *page, size_t count)
3008 {
3009 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3010 }
3011
3012 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3013 char *page)
3014 {
3015 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3016
3017 if (!tg_pt_gp->tg_pt_gp_valid_id)
3018 return 0;
3019 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3020 }
3021
3022 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3023 const char *page, size_t count)
3024 {
3025 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3026 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3027 unsigned long tg_pt_gp_id;
3028 int ret;
3029
3030 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3031 if (ret < 0) {
3032 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3033 page);
3034 return ret;
3035 }
3036 if (tg_pt_gp_id > 0x0000ffff) {
3037 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3038 tg_pt_gp_id);
3039 return -EINVAL;
3040 }
3041
3042 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3043 if (ret < 0)
3044 return -EINVAL;
3045
3046 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3047 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3048 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3049 tg_pt_gp->tg_pt_gp_id);
3050
3051 return count;
3052 }
3053
3054 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3055 char *page)
3056 {
3057 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3058 struct se_lun *lun;
3059 ssize_t len = 0, cur_len;
3060 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3061
3062 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3063 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3064 lun_tg_pt_gp_link) {
3065 struct se_portal_group *tpg = lun->lun_tpg;
3066
3067 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3068 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3069 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3070 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3071 config_item_name(&lun->lun_group.cg_item));
3072 cur_len++; /* Extra byte for NULL terminator */
3073
3074 if ((cur_len + len) > PAGE_SIZE) {
3075 pr_warn("Ran out of lu_gp_show_attr"
3076 "_members buffer\n");
3077 break;
3078 }
3079 memcpy(page+len, buf, cur_len);
3080 len += cur_len;
3081 }
3082 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3083
3084 return len;
3085 }
3086
3087 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3088 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3089 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3090 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3091 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3092 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3093 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3094 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3095 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3096 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3097 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3098 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3099 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3100 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3101 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3102 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3103 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3104
3105 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3106 &target_tg_pt_gp_attr_alua_access_state,
3107 &target_tg_pt_gp_attr_alua_access_status,
3108 &target_tg_pt_gp_attr_alua_access_type,
3109 &target_tg_pt_gp_attr_alua_support_transitioning,
3110 &target_tg_pt_gp_attr_alua_support_offline,
3111 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3112 &target_tg_pt_gp_attr_alua_support_unavailable,
3113 &target_tg_pt_gp_attr_alua_support_standby,
3114 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3115 &target_tg_pt_gp_attr_alua_support_active_optimized,
3116 &target_tg_pt_gp_attr_alua_write_metadata,
3117 &target_tg_pt_gp_attr_nonop_delay_msecs,
3118 &target_tg_pt_gp_attr_trans_delay_msecs,
3119 &target_tg_pt_gp_attr_implicit_trans_secs,
3120 &target_tg_pt_gp_attr_preferred,
3121 &target_tg_pt_gp_attr_tg_pt_gp_id,
3122 &target_tg_pt_gp_attr_members,
3123 NULL,
3124 };
3125
3126 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3127 {
3128 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3129 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3130
3131 core_alua_free_tg_pt_gp(tg_pt_gp);
3132 }
3133
3134 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3135 .release = target_core_alua_tg_pt_gp_release,
3136 };
3137
3138 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3139 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3140 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3141 .ct_owner = THIS_MODULE,
3142 };
3143
3144 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3145
3146 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3147
3148 static struct config_group *target_core_alua_create_tg_pt_gp(
3149 struct config_group *group,
3150 const char *name)
3151 {
3152 struct t10_alua *alua = container_of(group, struct t10_alua,
3153 alua_tg_pt_gps_group);
3154 struct t10_alua_tg_pt_gp *tg_pt_gp;
3155 struct config_group *alua_tg_pt_gp_cg = NULL;
3156 struct config_item *alua_tg_pt_gp_ci = NULL;
3157
3158 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3159 if (!tg_pt_gp)
3160 return NULL;
3161
3162 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3163 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3164
3165 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3166 &target_core_alua_tg_pt_gp_cit);
3167
3168 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3169 " Group: alua/tg_pt_gps/%s\n",
3170 config_item_name(alua_tg_pt_gp_ci));
3171
3172 return alua_tg_pt_gp_cg;
3173 }
3174
3175 static void target_core_alua_drop_tg_pt_gp(
3176 struct config_group *group,
3177 struct config_item *item)
3178 {
3179 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3180 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3181
3182 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3183 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3184 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3185 /*
3186 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3187 * -> target_core_alua_tg_pt_gp_release().
3188 */
3189 config_item_put(item);
3190 }
3191
3192 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3193 .make_group = &target_core_alua_create_tg_pt_gp,
3194 .drop_item = &target_core_alua_drop_tg_pt_gp,
3195 };
3196
3197 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3198
3199 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3200
3201 /* Start functions for struct config_item_type target_core_alua_cit */
3202
3203 /*
3204 * target_core_alua_cit is a ConfigFS group that lives under
3205 * /sys/kernel/config/target/core/alua. There are default groups
3206 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3207 * target_core_alua_cit in target_core_init_configfs() below.
3208 */
3209 static const struct config_item_type target_core_alua_cit = {
3210 .ct_item_ops = NULL,
3211 .ct_attrs = NULL,
3212 .ct_owner = THIS_MODULE,
3213 };
3214
3215 /* End functions for struct config_item_type target_core_alua_cit */
3216
3217 /* Start functions for struct config_item_type tb_dev_stat_cit */
3218
3219 static struct config_group *target_core_stat_mkdir(
3220 struct config_group *group,
3221 const char *name)
3222 {
3223 return ERR_PTR(-ENOSYS);
3224 }
3225
3226 static void target_core_stat_rmdir(
3227 struct config_group *group,
3228 struct config_item *item)
3229 {
3230 return;
3231 }
3232
3233 static struct configfs_group_operations target_core_stat_group_ops = {
3234 .make_group = &target_core_stat_mkdir,
3235 .drop_item = &target_core_stat_rmdir,
3236 };
3237
3238 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3239
3240 /* End functions for struct config_item_type tb_dev_stat_cit */
3241
3242 /* Start functions for struct config_item_type target_core_hba_cit */
3243
3244 static struct config_group *target_core_make_subdev(
3245 struct config_group *group,
3246 const char *name)
3247 {
3248 struct t10_alua_tg_pt_gp *tg_pt_gp;
3249 struct config_item *hba_ci = &group->cg_item;
3250 struct se_hba *hba = item_to_hba(hba_ci);
3251 struct target_backend *tb = hba->backend;
3252 struct se_device *dev;
3253 int errno = -ENOMEM, ret;
3254
3255 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3256 if (ret)
3257 return ERR_PTR(ret);
3258
3259 dev = target_alloc_device(hba, name);
3260 if (!dev)
3261 goto out_unlock;
3262
3263 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3264
3265 config_group_init_type_name(&dev->dev_action_group, "action",
3266 &tb->tb_dev_action_cit);
3267 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3268
3269 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3270 &tb->tb_dev_attrib_cit);
3271 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3272
3273 config_group_init_type_name(&dev->dev_pr_group, "pr",
3274 &tb->tb_dev_pr_cit);
3275 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3276
3277 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3278 &tb->tb_dev_wwn_cit);
3279 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3280 &dev->dev_group);
3281
3282 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3283 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3284 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3285 &dev->dev_group);
3286
3287 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3288 "statistics", &tb->tb_dev_stat_cit);
3289 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3290 &dev->dev_group);
3291
3292 /*
3293 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3294 */
3295 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3296 if (!tg_pt_gp)
3297 goto out_free_device;
3298 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3299
3300 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3301 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3302 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3303 &dev->t10_alua.alua_tg_pt_gps_group);
3304
3305 /*
3306 * Add core/$HBA/$DEV/statistics/ default groups
3307 */
3308 target_stat_setup_dev_default_groups(dev);
3309
3310 mutex_unlock(&hba->hba_access_mutex);
3311 return &dev->dev_group;
3312
3313 out_free_device:
3314 target_free_device(dev);
3315 out_unlock:
3316 mutex_unlock(&hba->hba_access_mutex);
3317 return ERR_PTR(errno);
3318 }
3319
3320 static void target_core_drop_subdev(
3321 struct config_group *group,
3322 struct config_item *item)
3323 {
3324 struct config_group *dev_cg = to_config_group(item);
3325 struct se_device *dev =
3326 container_of(dev_cg, struct se_device, dev_group);
3327 struct se_hba *hba;
3328
3329 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3330
3331 mutex_lock(&hba->hba_access_mutex);
3332
3333 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3334 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3335
3336 /*
3337 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3338 * directly from target_core_alua_tg_pt_gp_release().
3339 */
3340 dev->t10_alua.default_tg_pt_gp = NULL;
3341
3342 configfs_remove_default_groups(dev_cg);
3343
3344 /*
3345 * se_dev is released from target_core_dev_item_ops->release()
3346 */
3347 config_item_put(item);
3348 mutex_unlock(&hba->hba_access_mutex);
3349 }
3350
3351 static struct configfs_group_operations target_core_hba_group_ops = {
3352 .make_group = target_core_make_subdev,
3353 .drop_item = target_core_drop_subdev,
3354 };
3355
3356
3357 static inline struct se_hba *to_hba(struct config_item *item)
3358 {
3359 return container_of(to_config_group(item), struct se_hba, hba_group);
3360 }
3361
3362 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3363 {
3364 struct se_hba *hba = to_hba(item);
3365
3366 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3367 hba->hba_id, hba->backend->ops->name,
3368 TARGET_CORE_VERSION);
3369 }
3370
3371 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3372 {
3373 struct se_hba *hba = to_hba(item);
3374 int hba_mode = 0;
3375
3376 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3377 hba_mode = 1;
3378
3379 return sprintf(page, "%d\n", hba_mode);
3380 }
3381
3382 static ssize_t target_hba_mode_store(struct config_item *item,
3383 const char *page, size_t count)
3384 {
3385 struct se_hba *hba = to_hba(item);
3386 unsigned long mode_flag;
3387 int ret;
3388
3389 if (hba->backend->ops->pmode_enable_hba == NULL)
3390 return -EINVAL;
3391
3392 ret = kstrtoul(page, 0, &mode_flag);
3393 if (ret < 0) {
3394 pr_err("Unable to extract hba mode flag: %d\n", ret);
3395 return ret;
3396 }
3397
3398 if (hba->dev_count) {
3399 pr_err("Unable to set hba_mode with active devices\n");
3400 return -EINVAL;
3401 }
3402
3403 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3404 if (ret < 0)
3405 return -EINVAL;
3406 if (ret > 0)
3407 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3408 else if (ret == 0)
3409 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3410
3411 return count;
3412 }
3413
3414 CONFIGFS_ATTR_RO(target_, hba_info);
3415 CONFIGFS_ATTR(target_, hba_mode);
3416
3417 static void target_core_hba_release(struct config_item *item)
3418 {
3419 struct se_hba *hba = container_of(to_config_group(item),
3420 struct se_hba, hba_group);
3421 core_delete_hba(hba);
3422 }
3423
3424 static struct configfs_attribute *target_core_hba_attrs[] = {
3425 &target_attr_hba_info,
3426 &target_attr_hba_mode,
3427 NULL,
3428 };
3429
3430 static struct configfs_item_operations target_core_hba_item_ops = {
3431 .release = target_core_hba_release,
3432 };
3433
3434 static const struct config_item_type target_core_hba_cit = {
3435 .ct_item_ops = &target_core_hba_item_ops,
3436 .ct_group_ops = &target_core_hba_group_ops,
3437 .ct_attrs = target_core_hba_attrs,
3438 .ct_owner = THIS_MODULE,
3439 };
3440
3441 static struct config_group *target_core_call_addhbatotarget(
3442 struct config_group *group,
3443 const char *name)
3444 {
3445 char *se_plugin_str, *str, *str2;
3446 struct se_hba *hba;
3447 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3448 unsigned long plugin_dep_id = 0;
3449 int ret;
3450
3451 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3452 pr_err("Passed *name strlen(): %d exceeds"
3453 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3454 TARGET_CORE_NAME_MAX_LEN);
3455 return ERR_PTR(-ENAMETOOLONG);
3456 }
3457 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3458
3459 str = strstr(buf, "_");
3460 if (!str) {
3461 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3462 return ERR_PTR(-EINVAL);
3463 }
3464 se_plugin_str = buf;
3465 /*
3466 * Special case for subsystem plugins that have "_" in their names.
3467 * Namely rd_direct and rd_mcp..
3468 */
3469 str2 = strstr(str+1, "_");
3470 if (str2) {
3471 *str2 = '\0'; /* Terminate for *se_plugin_str */
3472 str2++; /* Skip to start of plugin dependent ID */
3473 str = str2;
3474 } else {
3475 *str = '\0'; /* Terminate for *se_plugin_str */
3476 str++; /* Skip to start of plugin dependent ID */
3477 }
3478
3479 ret = kstrtoul(str, 0, &plugin_dep_id);
3480 if (ret < 0) {
3481 pr_err("kstrtoul() returned %d for"
3482 " plugin_dep_id\n", ret);
3483 return ERR_PTR(ret);
3484 }
3485 /*
3486 * Load up TCM subsystem plugins if they have not already been loaded.
3487 */
3488 transport_subsystem_check_init();
3489
3490 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3491 if (IS_ERR(hba))
3492 return ERR_CAST(hba);
3493
3494 config_group_init_type_name(&hba->hba_group, name,
3495 &target_core_hba_cit);
3496
3497 return &hba->hba_group;
3498 }
3499
3500 static void target_core_call_delhbafromtarget(
3501 struct config_group *group,
3502 struct config_item *item)
3503 {
3504 /*
3505 * core_delete_hba() is called from target_core_hba_item_ops->release()
3506 * -> target_core_hba_release()
3507 */
3508 config_item_put(item);
3509 }
3510
3511 static struct configfs_group_operations target_core_group_ops = {
3512 .make_group = target_core_call_addhbatotarget,
3513 .drop_item = target_core_call_delhbafromtarget,
3514 };
3515
3516 static const struct config_item_type target_core_cit = {
3517 .ct_item_ops = NULL,
3518 .ct_group_ops = &target_core_group_ops,
3519 .ct_attrs = NULL,
3520 .ct_owner = THIS_MODULE,
3521 };
3522
3523 /* Stop functions for struct config_item_type target_core_hba_cit */
3524
3525 void target_setup_backend_cits(struct target_backend *tb)
3526 {
3527 target_core_setup_dev_cit(tb);
3528 target_core_setup_dev_action_cit(tb);
3529 target_core_setup_dev_attrib_cit(tb);
3530 target_core_setup_dev_pr_cit(tb);
3531 target_core_setup_dev_wwn_cit(tb);
3532 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3533 target_core_setup_dev_stat_cit(tb);
3534 }
3535
3536 static void target_init_dbroot(void)
3537 {
3538 struct file *fp;
3539
3540 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3541 fp = filp_open(db_root_stage, O_RDONLY, 0);
3542 if (IS_ERR(fp)) {
3543 pr_err("db_root: cannot open: %s\n", db_root_stage);
3544 return;
3545 }
3546 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3547 filp_close(fp, NULL);
3548 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3549 return;
3550 }
3551 filp_close(fp, NULL);
3552
3553 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3554 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3555 }
3556
3557 static int __init target_core_init_configfs(void)
3558 {
3559 struct configfs_subsystem *subsys = &target_core_fabrics;
3560 struct t10_alua_lu_gp *lu_gp;
3561 int ret;
3562
3563 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3564 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3565 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3566
3567 config_group_init(&subsys->su_group);
3568 mutex_init(&subsys->su_mutex);
3569
3570 ret = init_se_kmem_caches();
3571 if (ret < 0)
3572 return ret;
3573 /*
3574 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3575 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3576 */
3577 config_group_init_type_name(&target_core_hbagroup, "core",
3578 &target_core_cit);
3579 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3580
3581 /*
3582 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3583 */
3584 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3585 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3586
3587 /*
3588 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3589 * groups under /sys/kernel/config/target/core/alua/
3590 */
3591 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3592 &target_core_alua_lu_gps_cit);
3593 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3594
3595 /*
3596 * Add core/alua/lu_gps/default_lu_gp
3597 */
3598 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3599 if (IS_ERR(lu_gp)) {
3600 ret = -ENOMEM;
3601 goto out_global;
3602 }
3603
3604 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3605 &target_core_alua_lu_gp_cit);
3606 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3607
3608 default_lu_gp = lu_gp;
3609
3610 /*
3611 * Register the target_core_mod subsystem with configfs.
3612 */
3613 ret = configfs_register_subsystem(subsys);
3614 if (ret < 0) {
3615 pr_err("Error %d while registering subsystem %s\n",
3616 ret, subsys->su_group.cg_item.ci_namebuf);
3617 goto out_global;
3618 }
3619 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3620 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3621 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3622 /*
3623 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3624 */
3625 ret = rd_module_init();
3626 if (ret < 0)
3627 goto out;
3628
3629 ret = core_dev_setup_virtual_lun0();
3630 if (ret < 0)
3631 goto out;
3632
3633 ret = target_xcopy_setup_pt();
3634 if (ret < 0)
3635 goto out;
3636
3637 target_init_dbroot();
3638
3639 return 0;
3640
3641 out:
3642 configfs_unregister_subsystem(subsys);
3643 core_dev_release_virtual_lun0();
3644 rd_module_exit();
3645 out_global:
3646 if (default_lu_gp) {
3647 core_alua_free_lu_gp(default_lu_gp);
3648 default_lu_gp = NULL;
3649 }
3650 release_se_kmem_caches();
3651 return ret;
3652 }
3653
3654 static void __exit target_core_exit_configfs(void)
3655 {
3656 configfs_remove_default_groups(&alua_lu_gps_group);
3657 configfs_remove_default_groups(&alua_group);
3658 configfs_remove_default_groups(&target_core_hbagroup);
3659
3660 /*
3661 * We expect subsys->su_group.default_groups to be released
3662 * by configfs subsystem provider logic..
3663 */
3664 configfs_unregister_subsystem(&target_core_fabrics);
3665
3666 core_alua_free_lu_gp(default_lu_gp);
3667 default_lu_gp = NULL;
3668
3669 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3670 " Infrastructure\n");
3671
3672 core_dev_release_virtual_lun0();
3673 rd_module_exit();
3674 target_xcopy_release_pt();
3675 release_se_kmem_caches();
3676 }
3677
3678 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3679 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3680 MODULE_LICENSE("GPL");
3681
3682 module_init(target_core_init_configfs);
3683 module_exit(target_core_exit_configfs);
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