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 unsigned int target_devices;
76 static DEFINE_MUTEX(target_devices_lock);
77
78 static inline struct se_hba *
item_to_hba(struct config_item * item)79 item_to_hba(struct config_item *item)
80 {
81 return container_of(to_config_group(item), struct se_hba, hba_group);
82 }
83
84 /*
85 * Attributes for /sys/kernel/config/target/
86 */
target_core_item_version_show(struct config_item * item,char * page)87 static ssize_t target_core_item_version_show(struct config_item *item,
88 char *page)
89 {
90 return sprintf(page, "Target Engine Core ConfigFS Infrastructure %s"
91 " on %s/%s on "UTS_RELEASE"\n", TARGET_CORE_VERSION,
92 utsname()->sysname, utsname()->machine);
93 }
94
95 CONFIGFS_ATTR_RO(target_core_item_, version);
96
97 char db_root[DB_ROOT_LEN] = DB_ROOT_DEFAULT;
98 static char db_root_stage[DB_ROOT_LEN];
99
target_core_item_dbroot_show(struct config_item * item,char * page)100 static ssize_t target_core_item_dbroot_show(struct config_item *item,
101 char *page)
102 {
103 return sprintf(page, "%s\n", db_root);
104 }
105
target_core_item_dbroot_store(struct config_item * item,const char * page,size_t count)106 static ssize_t target_core_item_dbroot_store(struct config_item *item,
107 const char *page, size_t count)
108 {
109 ssize_t read_bytes;
110 struct file *fp;
111 ssize_t r = -EINVAL;
112
113 mutex_lock(&target_devices_lock);
114 if (target_devices) {
115 pr_err("db_root: cannot be changed because it's in use\n");
116 goto unlock;
117 }
118
119 if (count > (DB_ROOT_LEN - 1)) {
120 pr_err("db_root: count %d exceeds DB_ROOT_LEN-1: %u\n",
121 (int)count, DB_ROOT_LEN - 1);
122 goto unlock;
123 }
124
125 read_bytes = snprintf(db_root_stage, DB_ROOT_LEN, "%s", page);
126 if (!read_bytes)
127 goto unlock;
128
129 if (db_root_stage[read_bytes - 1] == '\n')
130 db_root_stage[read_bytes - 1] = '\0';
131
132 /* validate new db root before accepting it */
133 fp = filp_open(db_root_stage, O_RDONLY, 0);
134 if (IS_ERR(fp)) {
135 pr_err("db_root: cannot open: %s\n", db_root_stage);
136 goto unlock;
137 }
138 if (!S_ISDIR(file_inode(fp)->i_mode)) {
139 filp_close(fp, NULL);
140 pr_err("db_root: not a directory: %s\n", db_root_stage);
141 goto unlock;
142 }
143 filp_close(fp, NULL);
144
145 strncpy(db_root, db_root_stage, read_bytes);
146 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
147
148 r = read_bytes;
149
150 unlock:
151 mutex_unlock(&target_devices_lock);
152 return r;
153 }
154
155 CONFIGFS_ATTR(target_core_item_, dbroot);
156
target_core_get_fabric(const char * name)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 */
target_core_register_fabric(struct config_group * group,const char * name)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 */
target_core_deregister_fabric(struct config_group * group,struct config_item * item)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
target_depend_item(struct config_item * item)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
target_undepend_item(struct config_item * item)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
target_fabric_tf_ops_check(const struct target_core_fabric_ops * tfo)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
target_register_template(const struct target_core_fabric_ops * fo)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
target_unregister_template(const struct target_core_fabric_ops * fo)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->tf_tpg_base_cit.ct_attrs);
494 kfree(t);
495 return;
496 }
497 }
498 mutex_unlock(&g_tf_lock);
499 }
500 EXPORT_SYMBOL(target_unregister_template);
501
502 /*##############################################################################
503 // Stop functions called by external Target Fabrics Modules
504 //############################################################################*/
505
to_attrib(struct config_item * item)506 static inline struct se_dev_attrib *to_attrib(struct config_item *item)
507 {
508 return container_of(to_config_group(item), struct se_dev_attrib,
509 da_group);
510 }
511
512 /* Start functions for struct config_item_type tb_dev_attrib_cit */
513 #define DEF_CONFIGFS_ATTRIB_SHOW(_name) \
514 static ssize_t _name##_show(struct config_item *item, char *page) \
515 { \
516 return snprintf(page, PAGE_SIZE, "%u\n", to_attrib(item)->_name); \
517 }
518
519 DEF_CONFIGFS_ATTRIB_SHOW(emulate_model_alias);
520 DEF_CONFIGFS_ATTRIB_SHOW(emulate_dpo);
521 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_write);
522 DEF_CONFIGFS_ATTRIB_SHOW(emulate_fua_read);
523 DEF_CONFIGFS_ATTRIB_SHOW(emulate_write_cache);
524 DEF_CONFIGFS_ATTRIB_SHOW(emulate_ua_intlck_ctrl);
525 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tas);
526 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpu);
527 DEF_CONFIGFS_ATTRIB_SHOW(emulate_tpws);
528 DEF_CONFIGFS_ATTRIB_SHOW(emulate_caw);
529 DEF_CONFIGFS_ATTRIB_SHOW(emulate_3pc);
530 DEF_CONFIGFS_ATTRIB_SHOW(emulate_pr);
531 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_type);
532 DEF_CONFIGFS_ATTRIB_SHOW(hw_pi_prot_type);
533 DEF_CONFIGFS_ATTRIB_SHOW(pi_prot_verify);
534 DEF_CONFIGFS_ATTRIB_SHOW(enforce_pr_isids);
535 DEF_CONFIGFS_ATTRIB_SHOW(is_nonrot);
536 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rest_reord);
537 DEF_CONFIGFS_ATTRIB_SHOW(force_pr_aptpl);
538 DEF_CONFIGFS_ATTRIB_SHOW(hw_block_size);
539 DEF_CONFIGFS_ATTRIB_SHOW(block_size);
540 DEF_CONFIGFS_ATTRIB_SHOW(hw_max_sectors);
541 DEF_CONFIGFS_ATTRIB_SHOW(optimal_sectors);
542 DEF_CONFIGFS_ATTRIB_SHOW(hw_queue_depth);
543 DEF_CONFIGFS_ATTRIB_SHOW(queue_depth);
544 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_lba_count);
545 DEF_CONFIGFS_ATTRIB_SHOW(max_unmap_block_desc_count);
546 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity);
547 DEF_CONFIGFS_ATTRIB_SHOW(unmap_granularity_alignment);
548 DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
549 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
550
551 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name) \
552 static ssize_t _name##_store(struct config_item *item, const char *page,\
553 size_t count) \
554 { \
555 struct se_dev_attrib *da = to_attrib(item); \
556 u32 val; \
557 int ret; \
558 \
559 ret = kstrtou32(page, 0, &val); \
560 if (ret < 0) \
561 return ret; \
562 da->_name = val; \
563 return count; \
564 }
565
566 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_lba_count);
567 DEF_CONFIGFS_ATTRIB_STORE_U32(max_unmap_block_desc_count);
568 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity);
569 DEF_CONFIGFS_ATTRIB_STORE_U32(unmap_granularity_alignment);
570 DEF_CONFIGFS_ATTRIB_STORE_U32(max_write_same_len);
571
572 #define DEF_CONFIGFS_ATTRIB_STORE_BOOL(_name) \
573 static ssize_t _name##_store(struct config_item *item, const char *page, \
574 size_t count) \
575 { \
576 struct se_dev_attrib *da = to_attrib(item); \
577 bool flag; \
578 int ret; \
579 \
580 ret = strtobool(page, &flag); \
581 if (ret < 0) \
582 return ret; \
583 da->_name = flag; \
584 return count; \
585 }
586
587 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_fua_write);
588 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_caw);
589 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_3pc);
590 DEF_CONFIGFS_ATTRIB_STORE_BOOL(emulate_pr);
591 DEF_CONFIGFS_ATTRIB_STORE_BOOL(enforce_pr_isids);
592 DEF_CONFIGFS_ATTRIB_STORE_BOOL(is_nonrot);
593
594 #define DEF_CONFIGFS_ATTRIB_STORE_STUB(_name) \
595 static ssize_t _name##_store(struct config_item *item, const char *page,\
596 size_t count) \
597 { \
598 printk_once(KERN_WARNING \
599 "ignoring deprecated %s attribute\n", \
600 __stringify(_name)); \
601 return count; \
602 }
603
604 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_dpo);
605 DEF_CONFIGFS_ATTRIB_STORE_STUB(emulate_fua_read);
606
dev_set_t10_wwn_model_alias(struct se_device * dev)607 static void dev_set_t10_wwn_model_alias(struct se_device *dev)
608 {
609 const char *configname;
610
611 configname = config_item_name(&dev->dev_group.cg_item);
612 if (strlen(configname) >= INQUIRY_MODEL_LEN) {
613 pr_warn("dev[%p]: Backstore name '%s' is too long for "
614 "INQUIRY_MODEL, truncating to 15 characters\n", dev,
615 configname);
616 }
617 /*
618 * XXX We can't use sizeof(dev->t10_wwn.model) (INQUIRY_MODEL_LEN + 1)
619 * here without potentially breaking existing setups, so continue to
620 * truncate one byte shorter than what can be carried in INQUIRY.
621 */
622 strlcpy(dev->t10_wwn.model, configname, INQUIRY_MODEL_LEN);
623 }
624
emulate_model_alias_store(struct config_item * item,const char * page,size_t count)625 static ssize_t emulate_model_alias_store(struct config_item *item,
626 const char *page, size_t count)
627 {
628 struct se_dev_attrib *da = to_attrib(item);
629 struct se_device *dev = da->da_dev;
630 bool flag;
631 int ret;
632
633 if (dev->export_count) {
634 pr_err("dev[%p]: Unable to change model alias"
635 " while export_count is %d\n",
636 dev, dev->export_count);
637 return -EINVAL;
638 }
639
640 ret = strtobool(page, &flag);
641 if (ret < 0)
642 return ret;
643
644 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
645 if (flag) {
646 dev_set_t10_wwn_model_alias(dev);
647 } else {
648 strlcpy(dev->t10_wwn.model, dev->transport->inquiry_prod,
649 sizeof(dev->t10_wwn.model));
650 }
651 da->emulate_model_alias = flag;
652 return count;
653 }
654
emulate_write_cache_store(struct config_item * item,const char * page,size_t count)655 static ssize_t emulate_write_cache_store(struct config_item *item,
656 const char *page, size_t count)
657 {
658 struct se_dev_attrib *da = to_attrib(item);
659 bool flag;
660 int ret;
661
662 ret = strtobool(page, &flag);
663 if (ret < 0)
664 return ret;
665
666 if (flag && da->da_dev->transport->get_write_cache) {
667 pr_err("emulate_write_cache not supported for this device\n");
668 return -EINVAL;
669 }
670
671 da->emulate_write_cache = flag;
672 pr_debug("dev[%p]: SE Device WRITE_CACHE_EMULATION flag: %d\n",
673 da->da_dev, flag);
674 return count;
675 }
676
emulate_ua_intlck_ctrl_store(struct config_item * item,const char * page,size_t count)677 static ssize_t emulate_ua_intlck_ctrl_store(struct config_item *item,
678 const char *page, size_t count)
679 {
680 struct se_dev_attrib *da = to_attrib(item);
681 u32 val;
682 int ret;
683
684 ret = kstrtou32(page, 0, &val);
685 if (ret < 0)
686 return ret;
687
688 if (val != TARGET_UA_INTLCK_CTRL_CLEAR
689 && val != TARGET_UA_INTLCK_CTRL_NO_CLEAR
690 && val != TARGET_UA_INTLCK_CTRL_ESTABLISH_UA) {
691 pr_err("Illegal value %d\n", val);
692 return -EINVAL;
693 }
694
695 if (da->da_dev->export_count) {
696 pr_err("dev[%p]: Unable to change SE Device"
697 " UA_INTRLCK_CTRL while export_count is %d\n",
698 da->da_dev, da->da_dev->export_count);
699 return -EINVAL;
700 }
701 da->emulate_ua_intlck_ctrl = val;
702 pr_debug("dev[%p]: SE Device UA_INTRLCK_CTRL flag: %d\n",
703 da->da_dev, val);
704 return count;
705 }
706
emulate_tas_store(struct config_item * item,const char * page,size_t count)707 static ssize_t emulate_tas_store(struct config_item *item,
708 const char *page, size_t count)
709 {
710 struct se_dev_attrib *da = to_attrib(item);
711 bool flag;
712 int ret;
713
714 ret = strtobool(page, &flag);
715 if (ret < 0)
716 return ret;
717
718 if (da->da_dev->export_count) {
719 pr_err("dev[%p]: Unable to change SE Device TAS while"
720 " export_count is %d\n",
721 da->da_dev, da->da_dev->export_count);
722 return -EINVAL;
723 }
724 da->emulate_tas = flag;
725 pr_debug("dev[%p]: SE Device TASK_ABORTED status bit: %s\n",
726 da->da_dev, flag ? "Enabled" : "Disabled");
727
728 return count;
729 }
730
emulate_tpu_store(struct config_item * item,const char * page,size_t count)731 static ssize_t emulate_tpu_store(struct config_item *item,
732 const char *page, size_t count)
733 {
734 struct se_dev_attrib *da = to_attrib(item);
735 struct se_device *dev = da->da_dev;
736 bool flag;
737 int ret;
738
739 ret = strtobool(page, &flag);
740 if (ret < 0)
741 return ret;
742
743 /*
744 * We expect this value to be non-zero when generic Block Layer
745 * Discard supported is detected iblock_create_virtdevice().
746 */
747 if (flag && !da->max_unmap_block_desc_count) {
748 if (!dev->transport->configure_unmap ||
749 !dev->transport->configure_unmap(dev)) {
750 pr_err("Generic Block Discard not supported\n");
751 return -ENOSYS;
752 }
753 }
754
755 da->emulate_tpu = flag;
756 pr_debug("dev[%p]: SE Device Thin Provisioning UNMAP bit: %d\n",
757 da->da_dev, flag);
758 return count;
759 }
760
emulate_tpws_store(struct config_item * item,const char * page,size_t count)761 static ssize_t emulate_tpws_store(struct config_item *item,
762 const char *page, size_t count)
763 {
764 struct se_dev_attrib *da = to_attrib(item);
765 struct se_device *dev = da->da_dev;
766 bool flag;
767 int ret;
768
769 ret = strtobool(page, &flag);
770 if (ret < 0)
771 return ret;
772
773 /*
774 * We expect this value to be non-zero when generic Block Layer
775 * Discard supported is detected iblock_create_virtdevice().
776 */
777 if (flag && !da->max_unmap_block_desc_count) {
778 if (!dev->transport->configure_unmap ||
779 !dev->transport->configure_unmap(dev)) {
780 pr_err("Generic Block Discard not supported\n");
781 return -ENOSYS;
782 }
783 }
784
785 da->emulate_tpws = flag;
786 pr_debug("dev[%p]: SE Device Thin Provisioning WRITE_SAME: %d\n",
787 da->da_dev, flag);
788 return count;
789 }
790
pi_prot_type_store(struct config_item * item,const char * page,size_t count)791 static ssize_t pi_prot_type_store(struct config_item *item,
792 const char *page, size_t count)
793 {
794 struct se_dev_attrib *da = to_attrib(item);
795 int old_prot = da->pi_prot_type, ret;
796 struct se_device *dev = da->da_dev;
797 u32 flag;
798
799 ret = kstrtou32(page, 0, &flag);
800 if (ret < 0)
801 return ret;
802
803 if (flag != 0 && flag != 1 && flag != 2 && flag != 3) {
804 pr_err("Illegal value %d for pi_prot_type\n", flag);
805 return -EINVAL;
806 }
807 if (flag == 2) {
808 pr_err("DIF TYPE2 protection currently not supported\n");
809 return -ENOSYS;
810 }
811 if (da->hw_pi_prot_type) {
812 pr_warn("DIF protection enabled on underlying hardware,"
813 " ignoring\n");
814 return count;
815 }
816 if (!dev->transport->init_prot || !dev->transport->free_prot) {
817 /* 0 is only allowed value for non-supporting backends */
818 if (flag == 0)
819 return count;
820
821 pr_err("DIF protection not supported by backend: %s\n",
822 dev->transport->name);
823 return -ENOSYS;
824 }
825 if (!target_dev_configured(dev)) {
826 pr_err("DIF protection requires device to be configured\n");
827 return -ENODEV;
828 }
829 if (dev->export_count) {
830 pr_err("dev[%p]: Unable to change SE Device PROT type while"
831 " export_count is %d\n", dev, dev->export_count);
832 return -EINVAL;
833 }
834
835 da->pi_prot_type = flag;
836
837 if (flag && !old_prot) {
838 ret = dev->transport->init_prot(dev);
839 if (ret) {
840 da->pi_prot_type = old_prot;
841 da->pi_prot_verify = (bool) da->pi_prot_type;
842 return ret;
843 }
844
845 } else if (!flag && old_prot) {
846 dev->transport->free_prot(dev);
847 }
848
849 da->pi_prot_verify = (bool) da->pi_prot_type;
850 pr_debug("dev[%p]: SE Device Protection Type: %d\n", dev, flag);
851 return count;
852 }
853
854 /* always zero, but attr needs to remain RW to avoid userspace breakage */
pi_prot_format_show(struct config_item * item,char * page)855 static ssize_t pi_prot_format_show(struct config_item *item, char *page)
856 {
857 return snprintf(page, PAGE_SIZE, "0\n");
858 }
859
pi_prot_format_store(struct config_item * item,const char * page,size_t count)860 static ssize_t pi_prot_format_store(struct config_item *item,
861 const char *page, size_t count)
862 {
863 struct se_dev_attrib *da = to_attrib(item);
864 struct se_device *dev = da->da_dev;
865 bool flag;
866 int ret;
867
868 ret = strtobool(page, &flag);
869 if (ret < 0)
870 return ret;
871
872 if (!flag)
873 return count;
874
875 if (!dev->transport->format_prot) {
876 pr_err("DIF protection format not supported by backend %s\n",
877 dev->transport->name);
878 return -ENOSYS;
879 }
880 if (!target_dev_configured(dev)) {
881 pr_err("DIF protection format requires device to be configured\n");
882 return -ENODEV;
883 }
884 if (dev->export_count) {
885 pr_err("dev[%p]: Unable to format SE Device PROT type while"
886 " export_count is %d\n", dev, dev->export_count);
887 return -EINVAL;
888 }
889
890 ret = dev->transport->format_prot(dev);
891 if (ret)
892 return ret;
893
894 pr_debug("dev[%p]: SE Device Protection Format complete\n", dev);
895 return count;
896 }
897
pi_prot_verify_store(struct config_item * item,const char * page,size_t count)898 static ssize_t pi_prot_verify_store(struct config_item *item,
899 const char *page, size_t count)
900 {
901 struct se_dev_attrib *da = to_attrib(item);
902 bool flag;
903 int ret;
904
905 ret = strtobool(page, &flag);
906 if (ret < 0)
907 return ret;
908
909 if (!flag) {
910 da->pi_prot_verify = flag;
911 return count;
912 }
913 if (da->hw_pi_prot_type) {
914 pr_warn("DIF protection enabled on underlying hardware,"
915 " ignoring\n");
916 return count;
917 }
918 if (!da->pi_prot_type) {
919 pr_warn("DIF protection not supported by backend, ignoring\n");
920 return count;
921 }
922 da->pi_prot_verify = flag;
923
924 return count;
925 }
926
force_pr_aptpl_store(struct config_item * item,const char * page,size_t count)927 static ssize_t force_pr_aptpl_store(struct config_item *item,
928 const char *page, size_t count)
929 {
930 struct se_dev_attrib *da = to_attrib(item);
931 bool flag;
932 int ret;
933
934 ret = strtobool(page, &flag);
935 if (ret < 0)
936 return ret;
937 if (da->da_dev->export_count) {
938 pr_err("dev[%p]: Unable to set force_pr_aptpl while"
939 " export_count is %d\n",
940 da->da_dev, da->da_dev->export_count);
941 return -EINVAL;
942 }
943
944 da->force_pr_aptpl = flag;
945 pr_debug("dev[%p]: SE Device force_pr_aptpl: %d\n", da->da_dev, flag);
946 return count;
947 }
948
emulate_rest_reord_store(struct config_item * item,const char * page,size_t count)949 static ssize_t emulate_rest_reord_store(struct config_item *item,
950 const char *page, size_t count)
951 {
952 struct se_dev_attrib *da = to_attrib(item);
953 bool flag;
954 int ret;
955
956 ret = strtobool(page, &flag);
957 if (ret < 0)
958 return ret;
959
960 if (flag != 0) {
961 printk(KERN_ERR "dev[%p]: SE Device emulation of restricted"
962 " reordering not implemented\n", da->da_dev);
963 return -ENOSYS;
964 }
965 da->emulate_rest_reord = flag;
966 pr_debug("dev[%p]: SE Device emulate_rest_reord: %d\n",
967 da->da_dev, flag);
968 return count;
969 }
970
unmap_zeroes_data_store(struct config_item * item,const char * page,size_t count)971 static ssize_t unmap_zeroes_data_store(struct config_item *item,
972 const char *page, size_t count)
973 {
974 struct se_dev_attrib *da = to_attrib(item);
975 struct se_device *dev = da->da_dev;
976 bool flag;
977 int ret;
978
979 ret = strtobool(page, &flag);
980 if (ret < 0)
981 return ret;
982
983 if (da->da_dev->export_count) {
984 pr_err("dev[%p]: Unable to change SE Device"
985 " unmap_zeroes_data while export_count is %d\n",
986 da->da_dev, da->da_dev->export_count);
987 return -EINVAL;
988 }
989 /*
990 * We expect this value to be non-zero when generic Block Layer
991 * Discard supported is detected iblock_configure_device().
992 */
993 if (flag && !da->max_unmap_block_desc_count) {
994 if (!dev->transport->configure_unmap ||
995 !dev->transport->configure_unmap(dev)) {
996 pr_err("dev[%p]: Thin Provisioning LBPRZ will not be set because max_unmap_block_desc_count is zero\n",
997 da->da_dev);
998 return -ENOSYS;
999 }
1000 }
1001 da->unmap_zeroes_data = flag;
1002 pr_debug("dev[%p]: SE Device Thin Provisioning LBPRZ bit: %d\n",
1003 da->da_dev, flag);
1004 return count;
1005 }
1006
1007 /*
1008 * Note, this can only be called on unexported SE Device Object.
1009 */
queue_depth_store(struct config_item * item,const char * page,size_t count)1010 static ssize_t queue_depth_store(struct config_item *item,
1011 const char *page, size_t count)
1012 {
1013 struct se_dev_attrib *da = to_attrib(item);
1014 struct se_device *dev = da->da_dev;
1015 u32 val;
1016 int ret;
1017
1018 ret = kstrtou32(page, 0, &val);
1019 if (ret < 0)
1020 return ret;
1021
1022 if (dev->export_count) {
1023 pr_err("dev[%p]: Unable to change SE Device TCQ while"
1024 " export_count is %d\n",
1025 dev, dev->export_count);
1026 return -EINVAL;
1027 }
1028 if (!val) {
1029 pr_err("dev[%p]: Illegal ZERO value for queue_depth\n", dev);
1030 return -EINVAL;
1031 }
1032
1033 if (val > dev->dev_attrib.queue_depth) {
1034 if (val > dev->dev_attrib.hw_queue_depth) {
1035 pr_err("dev[%p]: Passed queue_depth:"
1036 " %u exceeds TCM/SE_Device MAX"
1037 " TCQ: %u\n", dev, val,
1038 dev->dev_attrib.hw_queue_depth);
1039 return -EINVAL;
1040 }
1041 }
1042 da->queue_depth = dev->queue_depth = val;
1043 pr_debug("dev[%p]: SE Device TCQ Depth changed to: %u\n", dev, val);
1044 return count;
1045 }
1046
optimal_sectors_store(struct config_item * item,const char * page,size_t count)1047 static ssize_t optimal_sectors_store(struct config_item *item,
1048 const char *page, size_t count)
1049 {
1050 struct se_dev_attrib *da = to_attrib(item);
1051 u32 val;
1052 int ret;
1053
1054 ret = kstrtou32(page, 0, &val);
1055 if (ret < 0)
1056 return ret;
1057
1058 if (da->da_dev->export_count) {
1059 pr_err("dev[%p]: Unable to change SE Device"
1060 " optimal_sectors while export_count is %d\n",
1061 da->da_dev, da->da_dev->export_count);
1062 return -EINVAL;
1063 }
1064 if (val > da->hw_max_sectors) {
1065 pr_err("dev[%p]: Passed optimal_sectors %u cannot be"
1066 " greater than hw_max_sectors: %u\n",
1067 da->da_dev, val, da->hw_max_sectors);
1068 return -EINVAL;
1069 }
1070
1071 da->optimal_sectors = val;
1072 pr_debug("dev[%p]: SE Device optimal_sectors changed to %u\n",
1073 da->da_dev, val);
1074 return count;
1075 }
1076
block_size_store(struct config_item * item,const char * page,size_t count)1077 static ssize_t block_size_store(struct config_item *item,
1078 const char *page, size_t count)
1079 {
1080 struct se_dev_attrib *da = to_attrib(item);
1081 u32 val;
1082 int ret;
1083
1084 ret = kstrtou32(page, 0, &val);
1085 if (ret < 0)
1086 return ret;
1087
1088 if (da->da_dev->export_count) {
1089 pr_err("dev[%p]: Unable to change SE Device block_size"
1090 " while export_count is %d\n",
1091 da->da_dev, da->da_dev->export_count);
1092 return -EINVAL;
1093 }
1094
1095 if (val != 512 && val != 1024 && val != 2048 && val != 4096) {
1096 pr_err("dev[%p]: Illegal value for block_device: %u"
1097 " for SE device, must be 512, 1024, 2048 or 4096\n",
1098 da->da_dev, val);
1099 return -EINVAL;
1100 }
1101
1102 da->block_size = val;
1103 if (da->max_bytes_per_io)
1104 da->hw_max_sectors = da->max_bytes_per_io / val;
1105
1106 pr_debug("dev[%p]: SE Device block_size changed to %u\n",
1107 da->da_dev, val);
1108 return count;
1109 }
1110
alua_support_show(struct config_item * item,char * page)1111 static ssize_t alua_support_show(struct config_item *item, char *page)
1112 {
1113 struct se_dev_attrib *da = to_attrib(item);
1114 u8 flags = da->da_dev->transport_flags;
1115
1116 return snprintf(page, PAGE_SIZE, "%d\n",
1117 flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA ? 0 : 1);
1118 }
1119
alua_support_store(struct config_item * item,const char * page,size_t count)1120 static ssize_t alua_support_store(struct config_item *item,
1121 const char *page, size_t count)
1122 {
1123 struct se_dev_attrib *da = to_attrib(item);
1124 struct se_device *dev = da->da_dev;
1125 bool flag, oldflag;
1126 int ret;
1127
1128 ret = strtobool(page, &flag);
1129 if (ret < 0)
1130 return ret;
1131
1132 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_ALUA);
1133 if (flag == oldflag)
1134 return count;
1135
1136 if (!(dev->transport->transport_flags_changeable &
1137 TRANSPORT_FLAG_PASSTHROUGH_ALUA)) {
1138 pr_err("dev[%p]: Unable to change SE Device alua_support:"
1139 " alua_support has fixed value\n", dev);
1140 return -ENOSYS;
1141 }
1142
1143 if (flag)
1144 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1145 else
1146 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_ALUA;
1147 return count;
1148 }
1149
pgr_support_show(struct config_item * item,char * page)1150 static ssize_t pgr_support_show(struct config_item *item, char *page)
1151 {
1152 struct se_dev_attrib *da = to_attrib(item);
1153 u8 flags = da->da_dev->transport_flags;
1154
1155 return snprintf(page, PAGE_SIZE, "%d\n",
1156 flags & TRANSPORT_FLAG_PASSTHROUGH_PGR ? 0 : 1);
1157 }
1158
pgr_support_store(struct config_item * item,const char * page,size_t count)1159 static ssize_t pgr_support_store(struct config_item *item,
1160 const char *page, size_t count)
1161 {
1162 struct se_dev_attrib *da = to_attrib(item);
1163 struct se_device *dev = da->da_dev;
1164 bool flag, oldflag;
1165 int ret;
1166
1167 ret = strtobool(page, &flag);
1168 if (ret < 0)
1169 return ret;
1170
1171 oldflag = !(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR);
1172 if (flag == oldflag)
1173 return count;
1174
1175 if (!(dev->transport->transport_flags_changeable &
1176 TRANSPORT_FLAG_PASSTHROUGH_PGR)) {
1177 pr_err("dev[%p]: Unable to change SE Device pgr_support:"
1178 " pgr_support has fixed value\n", dev);
1179 return -ENOSYS;
1180 }
1181
1182 if (flag)
1183 dev->transport_flags &= ~TRANSPORT_FLAG_PASSTHROUGH_PGR;
1184 else
1185 dev->transport_flags |= TRANSPORT_FLAG_PASSTHROUGH_PGR;
1186 return count;
1187 }
1188
1189 CONFIGFS_ATTR(, emulate_model_alias);
1190 CONFIGFS_ATTR(, emulate_dpo);
1191 CONFIGFS_ATTR(, emulate_fua_write);
1192 CONFIGFS_ATTR(, emulate_fua_read);
1193 CONFIGFS_ATTR(, emulate_write_cache);
1194 CONFIGFS_ATTR(, emulate_ua_intlck_ctrl);
1195 CONFIGFS_ATTR(, emulate_tas);
1196 CONFIGFS_ATTR(, emulate_tpu);
1197 CONFIGFS_ATTR(, emulate_tpws);
1198 CONFIGFS_ATTR(, emulate_caw);
1199 CONFIGFS_ATTR(, emulate_3pc);
1200 CONFIGFS_ATTR(, emulate_pr);
1201 CONFIGFS_ATTR(, pi_prot_type);
1202 CONFIGFS_ATTR_RO(, hw_pi_prot_type);
1203 CONFIGFS_ATTR(, pi_prot_format);
1204 CONFIGFS_ATTR(, pi_prot_verify);
1205 CONFIGFS_ATTR(, enforce_pr_isids);
1206 CONFIGFS_ATTR(, is_nonrot);
1207 CONFIGFS_ATTR(, emulate_rest_reord);
1208 CONFIGFS_ATTR(, force_pr_aptpl);
1209 CONFIGFS_ATTR_RO(, hw_block_size);
1210 CONFIGFS_ATTR(, block_size);
1211 CONFIGFS_ATTR_RO(, hw_max_sectors);
1212 CONFIGFS_ATTR(, optimal_sectors);
1213 CONFIGFS_ATTR_RO(, hw_queue_depth);
1214 CONFIGFS_ATTR(, queue_depth);
1215 CONFIGFS_ATTR(, max_unmap_lba_count);
1216 CONFIGFS_ATTR(, max_unmap_block_desc_count);
1217 CONFIGFS_ATTR(, unmap_granularity);
1218 CONFIGFS_ATTR(, unmap_granularity_alignment);
1219 CONFIGFS_ATTR(, unmap_zeroes_data);
1220 CONFIGFS_ATTR(, max_write_same_len);
1221 CONFIGFS_ATTR(, alua_support);
1222 CONFIGFS_ATTR(, pgr_support);
1223
1224 /*
1225 * dev_attrib attributes for devices using the target core SBC/SPC
1226 * interpreter. Any backend using spc_parse_cdb should be using
1227 * these.
1228 */
1229 struct configfs_attribute *sbc_attrib_attrs[] = {
1230 &attr_emulate_model_alias,
1231 &attr_emulate_dpo,
1232 &attr_emulate_fua_write,
1233 &attr_emulate_fua_read,
1234 &attr_emulate_write_cache,
1235 &attr_emulate_ua_intlck_ctrl,
1236 &attr_emulate_tas,
1237 &attr_emulate_tpu,
1238 &attr_emulate_tpws,
1239 &attr_emulate_caw,
1240 &attr_emulate_3pc,
1241 &attr_emulate_pr,
1242 &attr_pi_prot_type,
1243 &attr_hw_pi_prot_type,
1244 &attr_pi_prot_format,
1245 &attr_pi_prot_verify,
1246 &attr_enforce_pr_isids,
1247 &attr_is_nonrot,
1248 &attr_emulate_rest_reord,
1249 &attr_force_pr_aptpl,
1250 &attr_hw_block_size,
1251 &attr_block_size,
1252 &attr_hw_max_sectors,
1253 &attr_optimal_sectors,
1254 &attr_hw_queue_depth,
1255 &attr_queue_depth,
1256 &attr_max_unmap_lba_count,
1257 &attr_max_unmap_block_desc_count,
1258 &attr_unmap_granularity,
1259 &attr_unmap_granularity_alignment,
1260 &attr_unmap_zeroes_data,
1261 &attr_max_write_same_len,
1262 &attr_alua_support,
1263 &attr_pgr_support,
1264 NULL,
1265 };
1266 EXPORT_SYMBOL(sbc_attrib_attrs);
1267
1268 /*
1269 * Minimal dev_attrib attributes for devices passing through CDBs.
1270 * In this case we only provide a few read-only attributes for
1271 * backwards compatibility.
1272 */
1273 struct configfs_attribute *passthrough_attrib_attrs[] = {
1274 &attr_hw_pi_prot_type,
1275 &attr_hw_block_size,
1276 &attr_hw_max_sectors,
1277 &attr_hw_queue_depth,
1278 &attr_emulate_pr,
1279 &attr_alua_support,
1280 &attr_pgr_support,
1281 NULL,
1282 };
1283 EXPORT_SYMBOL(passthrough_attrib_attrs);
1284
1285 /*
1286 * pr related dev_attrib attributes for devices passing through CDBs,
1287 * but allowing in core pr emulation.
1288 */
1289 struct configfs_attribute *passthrough_pr_attrib_attrs[] = {
1290 &attr_enforce_pr_isids,
1291 &attr_force_pr_aptpl,
1292 NULL,
1293 };
1294 EXPORT_SYMBOL(passthrough_pr_attrib_attrs);
1295
1296 TB_CIT_SETUP_DRV(dev_attrib, NULL, NULL);
1297 TB_CIT_SETUP_DRV(dev_action, NULL, NULL);
1298
1299 /* End functions for struct config_item_type tb_dev_attrib_cit */
1300
1301 /* Start functions for struct config_item_type tb_dev_wwn_cit */
1302
to_t10_wwn(struct config_item * item)1303 static struct t10_wwn *to_t10_wwn(struct config_item *item)
1304 {
1305 return container_of(to_config_group(item), struct t10_wwn, t10_wwn_group);
1306 }
1307
target_check_inquiry_data(char * buf)1308 static ssize_t target_check_inquiry_data(char *buf)
1309 {
1310 size_t len;
1311 int i;
1312
1313 len = strlen(buf);
1314
1315 /*
1316 * SPC 4.3.1:
1317 * ASCII data fields shall contain only ASCII printable characters
1318 * (i.e., code values 20h to 7Eh) and may be terminated with one or
1319 * more ASCII null (00h) characters.
1320 */
1321 for (i = 0; i < len; i++) {
1322 if (buf[i] < 0x20 || buf[i] > 0x7E) {
1323 pr_err("Emulated T10 Inquiry Data contains non-ASCII-printable characters\n");
1324 return -EINVAL;
1325 }
1326 }
1327
1328 return len;
1329 }
1330
1331 /*
1332 * STANDARD and VPD page 0x83 T10 Vendor Identification
1333 */
target_wwn_vendor_id_show(struct config_item * item,char * page)1334 static ssize_t target_wwn_vendor_id_show(struct config_item *item,
1335 char *page)
1336 {
1337 return sprintf(page, "%s\n", &to_t10_wwn(item)->vendor[0]);
1338 }
1339
target_wwn_vendor_id_store(struct config_item * item,const char * page,size_t count)1340 static ssize_t target_wwn_vendor_id_store(struct config_item *item,
1341 const char *page, size_t count)
1342 {
1343 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1344 struct se_device *dev = t10_wwn->t10_dev;
1345 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1346 unsigned char buf[INQUIRY_VENDOR_LEN + 2];
1347 char *stripped = NULL;
1348 size_t len;
1349 ssize_t ret;
1350
1351 len = strlcpy(buf, page, sizeof(buf));
1352 if (len < sizeof(buf)) {
1353 /* Strip any newline added from userspace. */
1354 stripped = strstrip(buf);
1355 len = strlen(stripped);
1356 }
1357 if (len > INQUIRY_VENDOR_LEN) {
1358 pr_err("Emulated T10 Vendor Identification exceeds"
1359 " INQUIRY_VENDOR_LEN: " __stringify(INQUIRY_VENDOR_LEN)
1360 "\n");
1361 return -EOVERFLOW;
1362 }
1363
1364 ret = target_check_inquiry_data(stripped);
1365
1366 if (ret < 0)
1367 return ret;
1368
1369 /*
1370 * Check to see if any active exports exist. If they do exist, fail
1371 * here as changing this information on the fly (underneath the
1372 * initiator side OS dependent multipath code) could cause negative
1373 * effects.
1374 */
1375 if (dev->export_count) {
1376 pr_err("Unable to set T10 Vendor Identification while"
1377 " active %d exports exist\n", dev->export_count);
1378 return -EINVAL;
1379 }
1380
1381 BUILD_BUG_ON(sizeof(dev->t10_wwn.vendor) != INQUIRY_VENDOR_LEN + 1);
1382 strlcpy(dev->t10_wwn.vendor, stripped, sizeof(dev->t10_wwn.vendor));
1383
1384 pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
1385 " %s\n", dev->t10_wwn.vendor);
1386
1387 return count;
1388 }
1389
target_wwn_product_id_show(struct config_item * item,char * page)1390 static ssize_t target_wwn_product_id_show(struct config_item *item,
1391 char *page)
1392 {
1393 return sprintf(page, "%s\n", &to_t10_wwn(item)->model[0]);
1394 }
1395
target_wwn_product_id_store(struct config_item * item,const char * page,size_t count)1396 static ssize_t target_wwn_product_id_store(struct config_item *item,
1397 const char *page, size_t count)
1398 {
1399 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1400 struct se_device *dev = t10_wwn->t10_dev;
1401 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1402 unsigned char buf[INQUIRY_MODEL_LEN + 2];
1403 char *stripped = NULL;
1404 size_t len;
1405 ssize_t ret;
1406
1407 len = strlcpy(buf, page, sizeof(buf));
1408 if (len < sizeof(buf)) {
1409 /* Strip any newline added from userspace. */
1410 stripped = strstrip(buf);
1411 len = strlen(stripped);
1412 }
1413 if (len > INQUIRY_MODEL_LEN) {
1414 pr_err("Emulated T10 Vendor exceeds INQUIRY_MODEL_LEN: "
1415 __stringify(INQUIRY_MODEL_LEN)
1416 "\n");
1417 return -EOVERFLOW;
1418 }
1419
1420 ret = target_check_inquiry_data(stripped);
1421
1422 if (ret < 0)
1423 return ret;
1424
1425 /*
1426 * Check to see if any active exports exist. If they do exist, fail
1427 * here as changing this information on the fly (underneath the
1428 * initiator side OS dependent multipath code) could cause negative
1429 * effects.
1430 */
1431 if (dev->export_count) {
1432 pr_err("Unable to set T10 Model while active %d exports exist\n",
1433 dev->export_count);
1434 return -EINVAL;
1435 }
1436
1437 BUILD_BUG_ON(sizeof(dev->t10_wwn.model) != INQUIRY_MODEL_LEN + 1);
1438 strlcpy(dev->t10_wwn.model, stripped, sizeof(dev->t10_wwn.model));
1439
1440 pr_debug("Target_Core_ConfigFS: Set emulated T10 Model Identification: %s\n",
1441 dev->t10_wwn.model);
1442
1443 return count;
1444 }
1445
target_wwn_revision_show(struct config_item * item,char * page)1446 static ssize_t target_wwn_revision_show(struct config_item *item,
1447 char *page)
1448 {
1449 return sprintf(page, "%s\n", &to_t10_wwn(item)->revision[0]);
1450 }
1451
target_wwn_revision_store(struct config_item * item,const char * page,size_t count)1452 static ssize_t target_wwn_revision_store(struct config_item *item,
1453 const char *page, size_t count)
1454 {
1455 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1456 struct se_device *dev = t10_wwn->t10_dev;
1457 /* +2 to allow for a trailing (stripped) '\n' and null-terminator */
1458 unsigned char buf[INQUIRY_REVISION_LEN + 2];
1459 char *stripped = NULL;
1460 size_t len;
1461 ssize_t ret;
1462
1463 len = strlcpy(buf, page, sizeof(buf));
1464 if (len < sizeof(buf)) {
1465 /* Strip any newline added from userspace. */
1466 stripped = strstrip(buf);
1467 len = strlen(stripped);
1468 }
1469 if (len > INQUIRY_REVISION_LEN) {
1470 pr_err("Emulated T10 Revision exceeds INQUIRY_REVISION_LEN: "
1471 __stringify(INQUIRY_REVISION_LEN)
1472 "\n");
1473 return -EOVERFLOW;
1474 }
1475
1476 ret = target_check_inquiry_data(stripped);
1477
1478 if (ret < 0)
1479 return ret;
1480
1481 /*
1482 * Check to see if any active exports exist. If they do exist, fail
1483 * here as changing this information on the fly (underneath the
1484 * initiator side OS dependent multipath code) could cause negative
1485 * effects.
1486 */
1487 if (dev->export_count) {
1488 pr_err("Unable to set T10 Revision while active %d exports exist\n",
1489 dev->export_count);
1490 return -EINVAL;
1491 }
1492
1493 BUILD_BUG_ON(sizeof(dev->t10_wwn.revision) != INQUIRY_REVISION_LEN + 1);
1494 strlcpy(dev->t10_wwn.revision, stripped, sizeof(dev->t10_wwn.revision));
1495
1496 pr_debug("Target_Core_ConfigFS: Set emulated T10 Revision: %s\n",
1497 dev->t10_wwn.revision);
1498
1499 return count;
1500 }
1501
1502 static ssize_t
target_wwn_company_id_show(struct config_item * item,char * page)1503 target_wwn_company_id_show(struct config_item *item,
1504 char *page)
1505 {
1506 return snprintf(page, PAGE_SIZE, "%#08x\n",
1507 to_t10_wwn(item)->company_id);
1508 }
1509
1510 static ssize_t
target_wwn_company_id_store(struct config_item * item,const char * page,size_t count)1511 target_wwn_company_id_store(struct config_item *item,
1512 const char *page, size_t count)
1513 {
1514 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1515 struct se_device *dev = t10_wwn->t10_dev;
1516 u32 val;
1517 int ret;
1518
1519 /*
1520 * The IEEE COMPANY_ID field should contain a 24-bit canonical
1521 * form OUI assigned by the IEEE.
1522 */
1523 ret = kstrtou32(page, 0, &val);
1524 if (ret < 0)
1525 return ret;
1526
1527 if (val >= 0x1000000)
1528 return -EOVERFLOW;
1529
1530 /*
1531 * Check to see if any active exports exist. If they do exist, fail
1532 * here as changing this information on the fly (underneath the
1533 * initiator side OS dependent multipath code) could cause negative
1534 * effects.
1535 */
1536 if (dev->export_count) {
1537 pr_err("Unable to set Company ID while %u exports exist\n",
1538 dev->export_count);
1539 return -EINVAL;
1540 }
1541
1542 t10_wwn->company_id = val;
1543
1544 pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n",
1545 t10_wwn->company_id);
1546
1547 return count;
1548 }
1549
1550 /*
1551 * VPD page 0x80 Unit serial
1552 */
target_wwn_vpd_unit_serial_show(struct config_item * item,char * page)1553 static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
1554 char *page)
1555 {
1556 return sprintf(page, "T10 VPD Unit Serial Number: %s\n",
1557 &to_t10_wwn(item)->unit_serial[0]);
1558 }
1559
target_wwn_vpd_unit_serial_store(struct config_item * item,const char * page,size_t count)1560 static ssize_t target_wwn_vpd_unit_serial_store(struct config_item *item,
1561 const char *page, size_t count)
1562 {
1563 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1564 struct se_device *dev = t10_wwn->t10_dev;
1565 unsigned char buf[INQUIRY_VPD_SERIAL_LEN] = { };
1566
1567 /*
1568 * If Linux/SCSI subsystem_api_t plugin got a VPD Unit Serial
1569 * from the struct scsi_device level firmware, do not allow
1570 * VPD Unit Serial to be emulated.
1571 *
1572 * Note this struct scsi_device could also be emulating VPD
1573 * information from its drivers/scsi LLD. But for now we assume
1574 * it is doing 'the right thing' wrt a world wide unique
1575 * VPD Unit Serial Number that OS dependent multipath can depend on.
1576 */
1577 if (dev->dev_flags & DF_FIRMWARE_VPD_UNIT_SERIAL) {
1578 pr_err("Underlying SCSI device firmware provided VPD"
1579 " Unit Serial, ignoring request\n");
1580 return -EOPNOTSUPP;
1581 }
1582
1583 if (strlen(page) >= INQUIRY_VPD_SERIAL_LEN) {
1584 pr_err("Emulated VPD Unit Serial exceeds"
1585 " INQUIRY_VPD_SERIAL_LEN: %d\n", INQUIRY_VPD_SERIAL_LEN);
1586 return -EOVERFLOW;
1587 }
1588 /*
1589 * Check to see if any active $FABRIC_MOD exports exist. If they
1590 * do exist, fail here as changing this information on the fly
1591 * (underneath the initiator side OS dependent multipath code)
1592 * could cause negative effects.
1593 */
1594 if (dev->export_count) {
1595 pr_err("Unable to set VPD Unit Serial while"
1596 " active %d $FABRIC_MOD exports exist\n",
1597 dev->export_count);
1598 return -EINVAL;
1599 }
1600
1601 /*
1602 * This currently assumes ASCII encoding for emulated VPD Unit Serial.
1603 *
1604 * Also, strip any newline added from the userspace
1605 * echo $UUID > $TARGET/$HBA/$STORAGE_OBJECT/wwn/vpd_unit_serial
1606 */
1607 snprintf(buf, INQUIRY_VPD_SERIAL_LEN, "%s", page);
1608 snprintf(dev->t10_wwn.unit_serial, INQUIRY_VPD_SERIAL_LEN,
1609 "%s", strstrip(buf));
1610 dev->dev_flags |= DF_EMULATED_VPD_UNIT_SERIAL;
1611
1612 pr_debug("Target_Core_ConfigFS: Set emulated VPD Unit Serial:"
1613 " %s\n", dev->t10_wwn.unit_serial);
1614
1615 return count;
1616 }
1617
1618 /*
1619 * VPD page 0x83 Protocol Identifier
1620 */
target_wwn_vpd_protocol_identifier_show(struct config_item * item,char * page)1621 static ssize_t target_wwn_vpd_protocol_identifier_show(struct config_item *item,
1622 char *page)
1623 {
1624 struct t10_wwn *t10_wwn = to_t10_wwn(item);
1625 struct t10_vpd *vpd;
1626 unsigned char buf[VPD_TMP_BUF_SIZE] = { };
1627 ssize_t len = 0;
1628
1629 spin_lock(&t10_wwn->t10_vpd_lock);
1630 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) {
1631 if (!vpd->protocol_identifier_set)
1632 continue;
1633
1634 transport_dump_vpd_proto_id(vpd, buf, VPD_TMP_BUF_SIZE);
1635
1636 if (len + strlen(buf) >= PAGE_SIZE)
1637 break;
1638
1639 len += sprintf(page+len, "%s", buf);
1640 }
1641 spin_unlock(&t10_wwn->t10_vpd_lock);
1642
1643 return len;
1644 }
1645
1646 /*
1647 * Generic wrapper for dumping VPD identifiers by association.
1648 */
1649 #define DEF_DEV_WWN_ASSOC_SHOW(_name, _assoc) \
1650 static ssize_t target_wwn_##_name##_show(struct config_item *item, \
1651 char *page) \
1652 { \
1653 struct t10_wwn *t10_wwn = to_t10_wwn(item); \
1654 struct t10_vpd *vpd; \
1655 unsigned char buf[VPD_TMP_BUF_SIZE]; \
1656 ssize_t len = 0; \
1657 \
1658 spin_lock(&t10_wwn->t10_vpd_lock); \
1659 list_for_each_entry(vpd, &t10_wwn->t10_vpd_list, vpd_list) { \
1660 if (vpd->association != _assoc) \
1661 continue; \
1662 \
1663 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1664 transport_dump_vpd_assoc(vpd, buf, VPD_TMP_BUF_SIZE); \
1665 if (len + strlen(buf) >= PAGE_SIZE) \
1666 break; \
1667 len += sprintf(page+len, "%s", buf); \
1668 \
1669 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1670 transport_dump_vpd_ident_type(vpd, buf, VPD_TMP_BUF_SIZE); \
1671 if (len + strlen(buf) >= PAGE_SIZE) \
1672 break; \
1673 len += sprintf(page+len, "%s", buf); \
1674 \
1675 memset(buf, 0, VPD_TMP_BUF_SIZE); \
1676 transport_dump_vpd_ident(vpd, buf, VPD_TMP_BUF_SIZE); \
1677 if (len + strlen(buf) >= PAGE_SIZE) \
1678 break; \
1679 len += sprintf(page+len, "%s", buf); \
1680 } \
1681 spin_unlock(&t10_wwn->t10_vpd_lock); \
1682 \
1683 return len; \
1684 }
1685
1686 /* VPD page 0x83 Association: Logical Unit */
1687 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_logical_unit, 0x00);
1688 /* VPD page 0x83 Association: Target Port */
1689 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
1690 /* VPD page 0x83 Association: SCSI Target Device */
1691 DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
1692
1693 CONFIGFS_ATTR(target_wwn_, vendor_id);
1694 CONFIGFS_ATTR(target_wwn_, product_id);
1695 CONFIGFS_ATTR(target_wwn_, revision);
1696 CONFIGFS_ATTR(target_wwn_, company_id);
1697 CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
1698 CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
1699 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
1700 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
1701 CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
1702
1703 static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
1704 &target_wwn_attr_vendor_id,
1705 &target_wwn_attr_product_id,
1706 &target_wwn_attr_revision,
1707 &target_wwn_attr_company_id,
1708 &target_wwn_attr_vpd_unit_serial,
1709 &target_wwn_attr_vpd_protocol_identifier,
1710 &target_wwn_attr_vpd_assoc_logical_unit,
1711 &target_wwn_attr_vpd_assoc_target_port,
1712 &target_wwn_attr_vpd_assoc_scsi_target_device,
1713 NULL,
1714 };
1715
1716 TB_CIT_SETUP(dev_wwn, NULL, NULL, target_core_dev_wwn_attrs);
1717
1718 /* End functions for struct config_item_type tb_dev_wwn_cit */
1719
1720 /* Start functions for struct config_item_type tb_dev_pr_cit */
1721
pr_to_dev(struct config_item * item)1722 static struct se_device *pr_to_dev(struct config_item *item)
1723 {
1724 return container_of(to_config_group(item), struct se_device,
1725 dev_pr_group);
1726 }
1727
target_core_dev_pr_show_spc3_res(struct se_device * dev,char * page)1728 static ssize_t target_core_dev_pr_show_spc3_res(struct se_device *dev,
1729 char *page)
1730 {
1731 struct se_node_acl *se_nacl;
1732 struct t10_pr_registration *pr_reg;
1733 char i_buf[PR_REG_ISID_ID_LEN] = { };
1734
1735 pr_reg = dev->dev_pr_res_holder;
1736 if (!pr_reg)
1737 return sprintf(page, "No SPC-3 Reservation holder\n");
1738
1739 se_nacl = pr_reg->pr_reg_nacl;
1740 core_pr_dump_initiator_port(pr_reg, i_buf, PR_REG_ISID_ID_LEN);
1741
1742 return sprintf(page, "SPC-3 Reservation: %s Initiator: %s%s\n",
1743 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1744 se_nacl->initiatorname, i_buf);
1745 }
1746
target_core_dev_pr_show_spc2_res(struct se_device * dev,char * page)1747 static ssize_t target_core_dev_pr_show_spc2_res(struct se_device *dev,
1748 char *page)
1749 {
1750 struct se_session *sess = dev->reservation_holder;
1751 struct se_node_acl *se_nacl;
1752 ssize_t len;
1753
1754 if (sess) {
1755 se_nacl = sess->se_node_acl;
1756 len = sprintf(page,
1757 "SPC-2 Reservation: %s Initiator: %s\n",
1758 se_nacl->se_tpg->se_tpg_tfo->fabric_name,
1759 se_nacl->initiatorname);
1760 } else {
1761 len = sprintf(page, "No SPC-2 Reservation holder\n");
1762 }
1763 return len;
1764 }
1765
target_pr_res_holder_show(struct config_item * item,char * page)1766 static ssize_t target_pr_res_holder_show(struct config_item *item, char *page)
1767 {
1768 struct se_device *dev = pr_to_dev(item);
1769 int ret;
1770
1771 if (!dev->dev_attrib.emulate_pr)
1772 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1773
1774 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1775 return sprintf(page, "Passthrough\n");
1776
1777 spin_lock(&dev->dev_reservation_lock);
1778 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1779 ret = target_core_dev_pr_show_spc2_res(dev, page);
1780 else
1781 ret = target_core_dev_pr_show_spc3_res(dev, page);
1782 spin_unlock(&dev->dev_reservation_lock);
1783 return ret;
1784 }
1785
target_pr_res_pr_all_tgt_pts_show(struct config_item * item,char * page)1786 static ssize_t target_pr_res_pr_all_tgt_pts_show(struct config_item *item,
1787 char *page)
1788 {
1789 struct se_device *dev = pr_to_dev(item);
1790 ssize_t len = 0;
1791
1792 spin_lock(&dev->dev_reservation_lock);
1793 if (!dev->dev_pr_res_holder) {
1794 len = sprintf(page, "No SPC-3 Reservation holder\n");
1795 } else if (dev->dev_pr_res_holder->pr_reg_all_tg_pt) {
1796 len = sprintf(page, "SPC-3 Reservation: All Target"
1797 " Ports registration\n");
1798 } else {
1799 len = sprintf(page, "SPC-3 Reservation: Single"
1800 " Target Port registration\n");
1801 }
1802
1803 spin_unlock(&dev->dev_reservation_lock);
1804 return len;
1805 }
1806
target_pr_res_pr_generation_show(struct config_item * item,char * page)1807 static ssize_t target_pr_res_pr_generation_show(struct config_item *item,
1808 char *page)
1809 {
1810 return sprintf(page, "0x%08x\n", pr_to_dev(item)->t10_pr.pr_generation);
1811 }
1812
1813
target_pr_res_pr_holder_tg_port_show(struct config_item * item,char * page)1814 static ssize_t target_pr_res_pr_holder_tg_port_show(struct config_item *item,
1815 char *page)
1816 {
1817 struct se_device *dev = pr_to_dev(item);
1818 struct se_node_acl *se_nacl;
1819 struct se_portal_group *se_tpg;
1820 struct t10_pr_registration *pr_reg;
1821 const struct target_core_fabric_ops *tfo;
1822 ssize_t len = 0;
1823
1824 spin_lock(&dev->dev_reservation_lock);
1825 pr_reg = dev->dev_pr_res_holder;
1826 if (!pr_reg) {
1827 len = sprintf(page, "No SPC-3 Reservation holder\n");
1828 goto out_unlock;
1829 }
1830
1831 se_nacl = pr_reg->pr_reg_nacl;
1832 se_tpg = se_nacl->se_tpg;
1833 tfo = se_tpg->se_tpg_tfo;
1834
1835 len += sprintf(page+len, "SPC-3 Reservation: %s"
1836 " Target Node Endpoint: %s\n", tfo->fabric_name,
1837 tfo->tpg_get_wwn(se_tpg));
1838 len += sprintf(page+len, "SPC-3 Reservation: Relative Port"
1839 " Identifier Tag: %hu %s Portal Group Tag: %hu"
1840 " %s Logical Unit: %llu\n", pr_reg->tg_pt_sep_rtpi,
1841 tfo->fabric_name, tfo->tpg_get_tag(se_tpg),
1842 tfo->fabric_name, pr_reg->pr_aptpl_target_lun);
1843
1844 out_unlock:
1845 spin_unlock(&dev->dev_reservation_lock);
1846 return len;
1847 }
1848
1849
target_pr_res_pr_registered_i_pts_show(struct config_item * item,char * page)1850 static ssize_t target_pr_res_pr_registered_i_pts_show(struct config_item *item,
1851 char *page)
1852 {
1853 struct se_device *dev = pr_to_dev(item);
1854 const struct target_core_fabric_ops *tfo;
1855 struct t10_pr_registration *pr_reg;
1856 unsigned char buf[384];
1857 char i_buf[PR_REG_ISID_ID_LEN];
1858 ssize_t len = 0;
1859 int reg_count = 0;
1860
1861 len += sprintf(page+len, "SPC-3 PR Registrations:\n");
1862
1863 spin_lock(&dev->t10_pr.registration_lock);
1864 list_for_each_entry(pr_reg, &dev->t10_pr.registration_list,
1865 pr_reg_list) {
1866
1867 memset(buf, 0, 384);
1868 memset(i_buf, 0, PR_REG_ISID_ID_LEN);
1869 tfo = pr_reg->pr_reg_nacl->se_tpg->se_tpg_tfo;
1870 core_pr_dump_initiator_port(pr_reg, i_buf,
1871 PR_REG_ISID_ID_LEN);
1872 sprintf(buf, "%s Node: %s%s Key: 0x%016Lx PRgen: 0x%08x\n",
1873 tfo->fabric_name,
1874 pr_reg->pr_reg_nacl->initiatorname, i_buf, pr_reg->pr_res_key,
1875 pr_reg->pr_res_generation);
1876
1877 if (len + strlen(buf) >= PAGE_SIZE)
1878 break;
1879
1880 len += sprintf(page+len, "%s", buf);
1881 reg_count++;
1882 }
1883 spin_unlock(&dev->t10_pr.registration_lock);
1884
1885 if (!reg_count)
1886 len += sprintf(page+len, "None\n");
1887
1888 return len;
1889 }
1890
target_pr_res_pr_type_show(struct config_item * item,char * page)1891 static ssize_t target_pr_res_pr_type_show(struct config_item *item, char *page)
1892 {
1893 struct se_device *dev = pr_to_dev(item);
1894 struct t10_pr_registration *pr_reg;
1895 ssize_t len = 0;
1896
1897 spin_lock(&dev->dev_reservation_lock);
1898 pr_reg = dev->dev_pr_res_holder;
1899 if (pr_reg) {
1900 len = sprintf(page, "SPC-3 Reservation Type: %s\n",
1901 core_scsi3_pr_dump_type(pr_reg->pr_res_type));
1902 } else {
1903 len = sprintf(page, "No SPC-3 Reservation holder\n");
1904 }
1905
1906 spin_unlock(&dev->dev_reservation_lock);
1907 return len;
1908 }
1909
target_pr_res_type_show(struct config_item * item,char * page)1910 static ssize_t target_pr_res_type_show(struct config_item *item, char *page)
1911 {
1912 struct se_device *dev = pr_to_dev(item);
1913
1914 if (!dev->dev_attrib.emulate_pr)
1915 return sprintf(page, "SPC_RESERVATIONS_DISABLED\n");
1916 if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)
1917 return sprintf(page, "SPC_PASSTHROUGH\n");
1918 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1919 return sprintf(page, "SPC2_RESERVATIONS\n");
1920
1921 return sprintf(page, "SPC3_PERSISTENT_RESERVATIONS\n");
1922 }
1923
target_pr_res_aptpl_active_show(struct config_item * item,char * page)1924 static ssize_t target_pr_res_aptpl_active_show(struct config_item *item,
1925 char *page)
1926 {
1927 struct se_device *dev = pr_to_dev(item);
1928
1929 if (!dev->dev_attrib.emulate_pr ||
1930 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1931 return 0;
1932
1933 return sprintf(page, "APTPL Bit Status: %s\n",
1934 (dev->t10_pr.pr_aptpl_active) ? "Activated" : "Disabled");
1935 }
1936
target_pr_res_aptpl_metadata_show(struct config_item * item,char * page)1937 static ssize_t target_pr_res_aptpl_metadata_show(struct config_item *item,
1938 char *page)
1939 {
1940 struct se_device *dev = pr_to_dev(item);
1941
1942 if (!dev->dev_attrib.emulate_pr ||
1943 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1944 return 0;
1945
1946 return sprintf(page, "Ready to process PR APTPL metadata..\n");
1947 }
1948
1949 enum {
1950 Opt_initiator_fabric, Opt_initiator_node, Opt_initiator_sid,
1951 Opt_sa_res_key, Opt_res_holder, Opt_res_type, Opt_res_scope,
1952 Opt_res_all_tg_pt, Opt_mapped_lun, Opt_target_fabric,
1953 Opt_target_node, Opt_tpgt, Opt_port_rtpi, Opt_target_lun, Opt_err
1954 };
1955
1956 static match_table_t tokens = {
1957 {Opt_initiator_fabric, "initiator_fabric=%s"},
1958 {Opt_initiator_node, "initiator_node=%s"},
1959 {Opt_initiator_sid, "initiator_sid=%s"},
1960 {Opt_sa_res_key, "sa_res_key=%s"},
1961 {Opt_res_holder, "res_holder=%d"},
1962 {Opt_res_type, "res_type=%d"},
1963 {Opt_res_scope, "res_scope=%d"},
1964 {Opt_res_all_tg_pt, "res_all_tg_pt=%d"},
1965 {Opt_mapped_lun, "mapped_lun=%u"},
1966 {Opt_target_fabric, "target_fabric=%s"},
1967 {Opt_target_node, "target_node=%s"},
1968 {Opt_tpgt, "tpgt=%d"},
1969 {Opt_port_rtpi, "port_rtpi=%d"},
1970 {Opt_target_lun, "target_lun=%u"},
1971 {Opt_err, NULL}
1972 };
1973
target_pr_res_aptpl_metadata_store(struct config_item * item,const char * page,size_t count)1974 static ssize_t target_pr_res_aptpl_metadata_store(struct config_item *item,
1975 const char *page, size_t count)
1976 {
1977 struct se_device *dev = pr_to_dev(item);
1978 unsigned char *i_fabric = NULL, *i_port = NULL, *isid = NULL;
1979 unsigned char *t_fabric = NULL, *t_port = NULL;
1980 char *orig, *ptr, *opts;
1981 substring_t args[MAX_OPT_ARGS];
1982 unsigned long long tmp_ll;
1983 u64 sa_res_key = 0;
1984 u64 mapped_lun = 0, target_lun = 0;
1985 int ret = -1, res_holder = 0, all_tg_pt = 0, arg, token;
1986 u16 tpgt = 0;
1987 u8 type = 0;
1988
1989 if (!dev->dev_attrib.emulate_pr ||
1990 (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR))
1991 return count;
1992 if (dev->dev_reservation_flags & DRF_SPC2_RESERVATIONS)
1993 return count;
1994
1995 if (dev->export_count) {
1996 pr_debug("Unable to process APTPL metadata while"
1997 " active fabric exports exist\n");
1998 return -EINVAL;
1999 }
2000
2001 opts = kstrdup(page, GFP_KERNEL);
2002 if (!opts)
2003 return -ENOMEM;
2004
2005 orig = opts;
2006 while ((ptr = strsep(&opts, ",\n")) != NULL) {
2007 if (!*ptr)
2008 continue;
2009
2010 token = match_token(ptr, tokens, args);
2011 switch (token) {
2012 case Opt_initiator_fabric:
2013 i_fabric = match_strdup(args);
2014 if (!i_fabric) {
2015 ret = -ENOMEM;
2016 goto out;
2017 }
2018 break;
2019 case Opt_initiator_node:
2020 i_port = match_strdup(args);
2021 if (!i_port) {
2022 ret = -ENOMEM;
2023 goto out;
2024 }
2025 if (strlen(i_port) >= PR_APTPL_MAX_IPORT_LEN) {
2026 pr_err("APTPL metadata initiator_node="
2027 " exceeds PR_APTPL_MAX_IPORT_LEN: %d\n",
2028 PR_APTPL_MAX_IPORT_LEN);
2029 ret = -EINVAL;
2030 break;
2031 }
2032 break;
2033 case Opt_initiator_sid:
2034 isid = match_strdup(args);
2035 if (!isid) {
2036 ret = -ENOMEM;
2037 goto out;
2038 }
2039 if (strlen(isid) >= PR_REG_ISID_LEN) {
2040 pr_err("APTPL metadata initiator_isid"
2041 "= exceeds PR_REG_ISID_LEN: %d\n",
2042 PR_REG_ISID_LEN);
2043 ret = -EINVAL;
2044 break;
2045 }
2046 break;
2047 case Opt_sa_res_key:
2048 ret = match_u64(args, &tmp_ll);
2049 if (ret < 0) {
2050 pr_err("kstrtoull() failed for sa_res_key=\n");
2051 goto out;
2052 }
2053 sa_res_key = (u64)tmp_ll;
2054 break;
2055 /*
2056 * PR APTPL Metadata for Reservation
2057 */
2058 case Opt_res_holder:
2059 ret = match_int(args, &arg);
2060 if (ret)
2061 goto out;
2062 res_holder = arg;
2063 break;
2064 case Opt_res_type:
2065 ret = match_int(args, &arg);
2066 if (ret)
2067 goto out;
2068 type = (u8)arg;
2069 break;
2070 case Opt_res_scope:
2071 ret = match_int(args, &arg);
2072 if (ret)
2073 goto out;
2074 break;
2075 case Opt_res_all_tg_pt:
2076 ret = match_int(args, &arg);
2077 if (ret)
2078 goto out;
2079 all_tg_pt = (int)arg;
2080 break;
2081 case Opt_mapped_lun:
2082 ret = match_u64(args, &tmp_ll);
2083 if (ret)
2084 goto out;
2085 mapped_lun = (u64)tmp_ll;
2086 break;
2087 /*
2088 * PR APTPL Metadata for Target Port
2089 */
2090 case Opt_target_fabric:
2091 t_fabric = match_strdup(args);
2092 if (!t_fabric) {
2093 ret = -ENOMEM;
2094 goto out;
2095 }
2096 break;
2097 case Opt_target_node:
2098 t_port = match_strdup(args);
2099 if (!t_port) {
2100 ret = -ENOMEM;
2101 goto out;
2102 }
2103 if (strlen(t_port) >= PR_APTPL_MAX_TPORT_LEN) {
2104 pr_err("APTPL metadata target_node="
2105 " exceeds PR_APTPL_MAX_TPORT_LEN: %d\n",
2106 PR_APTPL_MAX_TPORT_LEN);
2107 ret = -EINVAL;
2108 break;
2109 }
2110 break;
2111 case Opt_tpgt:
2112 ret = match_int(args, &arg);
2113 if (ret)
2114 goto out;
2115 tpgt = (u16)arg;
2116 break;
2117 case Opt_port_rtpi:
2118 ret = match_int(args, &arg);
2119 if (ret)
2120 goto out;
2121 break;
2122 case Opt_target_lun:
2123 ret = match_u64(args, &tmp_ll);
2124 if (ret)
2125 goto out;
2126 target_lun = (u64)tmp_ll;
2127 break;
2128 default:
2129 break;
2130 }
2131 }
2132
2133 if (!i_port || !t_port || !sa_res_key) {
2134 pr_err("Illegal parameters for APTPL registration\n");
2135 ret = -EINVAL;
2136 goto out;
2137 }
2138
2139 if (res_holder && !(type)) {
2140 pr_err("Illegal PR type: 0x%02x for reservation"
2141 " holder\n", type);
2142 ret = -EINVAL;
2143 goto out;
2144 }
2145
2146 ret = core_scsi3_alloc_aptpl_registration(&dev->t10_pr, sa_res_key,
2147 i_port, isid, mapped_lun, t_port, tpgt, target_lun,
2148 res_holder, all_tg_pt, type);
2149 out:
2150 kfree(i_fabric);
2151 kfree(i_port);
2152 kfree(isid);
2153 kfree(t_fabric);
2154 kfree(t_port);
2155 kfree(orig);
2156 return (ret == 0) ? count : ret;
2157 }
2158
2159
2160 CONFIGFS_ATTR_RO(target_pr_, res_holder);
2161 CONFIGFS_ATTR_RO(target_pr_, res_pr_all_tgt_pts);
2162 CONFIGFS_ATTR_RO(target_pr_, res_pr_generation);
2163 CONFIGFS_ATTR_RO(target_pr_, res_pr_holder_tg_port);
2164 CONFIGFS_ATTR_RO(target_pr_, res_pr_registered_i_pts);
2165 CONFIGFS_ATTR_RO(target_pr_, res_pr_type);
2166 CONFIGFS_ATTR_RO(target_pr_, res_type);
2167 CONFIGFS_ATTR_RO(target_pr_, res_aptpl_active);
2168 CONFIGFS_ATTR(target_pr_, res_aptpl_metadata);
2169
2170 static struct configfs_attribute *target_core_dev_pr_attrs[] = {
2171 &target_pr_attr_res_holder,
2172 &target_pr_attr_res_pr_all_tgt_pts,
2173 &target_pr_attr_res_pr_generation,
2174 &target_pr_attr_res_pr_holder_tg_port,
2175 &target_pr_attr_res_pr_registered_i_pts,
2176 &target_pr_attr_res_pr_type,
2177 &target_pr_attr_res_type,
2178 &target_pr_attr_res_aptpl_active,
2179 &target_pr_attr_res_aptpl_metadata,
2180 NULL,
2181 };
2182
2183 TB_CIT_SETUP(dev_pr, NULL, NULL, target_core_dev_pr_attrs);
2184
2185 /* End functions for struct config_item_type tb_dev_pr_cit */
2186
2187 /* Start functions for struct config_item_type tb_dev_cit */
2188
to_device(struct config_item * item)2189 static inline struct se_device *to_device(struct config_item *item)
2190 {
2191 return container_of(to_config_group(item), struct se_device, dev_group);
2192 }
2193
target_dev_info_show(struct config_item * item,char * page)2194 static ssize_t target_dev_info_show(struct config_item *item, char *page)
2195 {
2196 struct se_device *dev = to_device(item);
2197 int bl = 0;
2198 ssize_t read_bytes = 0;
2199
2200 transport_dump_dev_state(dev, page, &bl);
2201 read_bytes += bl;
2202 read_bytes += dev->transport->show_configfs_dev_params(dev,
2203 page+read_bytes);
2204 return read_bytes;
2205 }
2206
target_dev_control_store(struct config_item * item,const char * page,size_t count)2207 static ssize_t target_dev_control_store(struct config_item *item,
2208 const char *page, size_t count)
2209 {
2210 struct se_device *dev = to_device(item);
2211
2212 return dev->transport->set_configfs_dev_params(dev, page, count);
2213 }
2214
target_dev_alias_show(struct config_item * item,char * page)2215 static ssize_t target_dev_alias_show(struct config_item *item, char *page)
2216 {
2217 struct se_device *dev = to_device(item);
2218
2219 if (!(dev->dev_flags & DF_USING_ALIAS))
2220 return 0;
2221
2222 return snprintf(page, PAGE_SIZE, "%s\n", dev->dev_alias);
2223 }
2224
target_dev_alias_store(struct config_item * item,const char * page,size_t count)2225 static ssize_t target_dev_alias_store(struct config_item *item,
2226 const char *page, size_t count)
2227 {
2228 struct se_device *dev = to_device(item);
2229 struct se_hba *hba = dev->se_hba;
2230 ssize_t read_bytes;
2231
2232 if (count > (SE_DEV_ALIAS_LEN-1)) {
2233 pr_err("alias count: %d exceeds"
2234 " SE_DEV_ALIAS_LEN-1: %u\n", (int)count,
2235 SE_DEV_ALIAS_LEN-1);
2236 return -EINVAL;
2237 }
2238
2239 read_bytes = snprintf(&dev->dev_alias[0], SE_DEV_ALIAS_LEN, "%s", page);
2240 if (!read_bytes)
2241 return -EINVAL;
2242 if (dev->dev_alias[read_bytes - 1] == '\n')
2243 dev->dev_alias[read_bytes - 1] = '\0';
2244
2245 dev->dev_flags |= DF_USING_ALIAS;
2246
2247 pr_debug("Target_Core_ConfigFS: %s/%s set alias: %s\n",
2248 config_item_name(&hba->hba_group.cg_item),
2249 config_item_name(&dev->dev_group.cg_item),
2250 dev->dev_alias);
2251
2252 return read_bytes;
2253 }
2254
target_dev_udev_path_show(struct config_item * item,char * page)2255 static ssize_t target_dev_udev_path_show(struct config_item *item, char *page)
2256 {
2257 struct se_device *dev = to_device(item);
2258
2259 if (!(dev->dev_flags & DF_USING_UDEV_PATH))
2260 return 0;
2261
2262 return snprintf(page, PAGE_SIZE, "%s\n", dev->udev_path);
2263 }
2264
target_dev_udev_path_store(struct config_item * item,const char * page,size_t count)2265 static ssize_t target_dev_udev_path_store(struct config_item *item,
2266 const char *page, size_t count)
2267 {
2268 struct se_device *dev = to_device(item);
2269 struct se_hba *hba = dev->se_hba;
2270 ssize_t read_bytes;
2271
2272 if (count > (SE_UDEV_PATH_LEN-1)) {
2273 pr_err("udev_path count: %d exceeds"
2274 " SE_UDEV_PATH_LEN-1: %u\n", (int)count,
2275 SE_UDEV_PATH_LEN-1);
2276 return -EINVAL;
2277 }
2278
2279 read_bytes = snprintf(&dev->udev_path[0], SE_UDEV_PATH_LEN,
2280 "%s", page);
2281 if (!read_bytes)
2282 return -EINVAL;
2283 if (dev->udev_path[read_bytes - 1] == '\n')
2284 dev->udev_path[read_bytes - 1] = '\0';
2285
2286 dev->dev_flags |= DF_USING_UDEV_PATH;
2287
2288 pr_debug("Target_Core_ConfigFS: %s/%s set udev_path: %s\n",
2289 config_item_name(&hba->hba_group.cg_item),
2290 config_item_name(&dev->dev_group.cg_item),
2291 dev->udev_path);
2292
2293 return read_bytes;
2294 }
2295
target_dev_enable_show(struct config_item * item,char * page)2296 static ssize_t target_dev_enable_show(struct config_item *item, char *page)
2297 {
2298 struct se_device *dev = to_device(item);
2299
2300 return snprintf(page, PAGE_SIZE, "%d\n", target_dev_configured(dev));
2301 }
2302
target_dev_enable_store(struct config_item * item,const char * page,size_t count)2303 static ssize_t target_dev_enable_store(struct config_item *item,
2304 const char *page, size_t count)
2305 {
2306 struct se_device *dev = to_device(item);
2307 char *ptr;
2308 int ret;
2309
2310 ptr = strstr(page, "1");
2311 if (!ptr) {
2312 pr_err("For dev_enable ops, only valid value"
2313 " is \"1\"\n");
2314 return -EINVAL;
2315 }
2316
2317 ret = target_configure_device(dev);
2318 if (ret)
2319 return ret;
2320 return count;
2321 }
2322
target_dev_alua_lu_gp_show(struct config_item * item,char * page)2323 static ssize_t target_dev_alua_lu_gp_show(struct config_item *item, char *page)
2324 {
2325 struct se_device *dev = to_device(item);
2326 struct config_item *lu_ci;
2327 struct t10_alua_lu_gp *lu_gp;
2328 struct t10_alua_lu_gp_member *lu_gp_mem;
2329 ssize_t len = 0;
2330
2331 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2332 if (!lu_gp_mem)
2333 return 0;
2334
2335 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2336 lu_gp = lu_gp_mem->lu_gp;
2337 if (lu_gp) {
2338 lu_ci = &lu_gp->lu_gp_group.cg_item;
2339 len += sprintf(page, "LU Group Alias: %s\nLU Group ID: %hu\n",
2340 config_item_name(lu_ci), lu_gp->lu_gp_id);
2341 }
2342 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2343
2344 return len;
2345 }
2346
target_dev_alua_lu_gp_store(struct config_item * item,const char * page,size_t count)2347 static ssize_t target_dev_alua_lu_gp_store(struct config_item *item,
2348 const char *page, size_t count)
2349 {
2350 struct se_device *dev = to_device(item);
2351 struct se_hba *hba = dev->se_hba;
2352 struct t10_alua_lu_gp *lu_gp = NULL, *lu_gp_new = NULL;
2353 struct t10_alua_lu_gp_member *lu_gp_mem;
2354 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2355 int move = 0;
2356
2357 lu_gp_mem = dev->dev_alua_lu_gp_mem;
2358 if (!lu_gp_mem)
2359 return count;
2360
2361 if (count > LU_GROUP_NAME_BUF) {
2362 pr_err("ALUA LU Group Alias too large!\n");
2363 return -EINVAL;
2364 }
2365 memcpy(buf, page, count);
2366 /*
2367 * Any ALUA logical unit alias besides "NULL" means we will be
2368 * making a new group association.
2369 */
2370 if (strcmp(strstrip(buf), "NULL")) {
2371 /*
2372 * core_alua_get_lu_gp_by_name() will increment reference to
2373 * struct t10_alua_lu_gp. This reference is released with
2374 * core_alua_get_lu_gp_by_name below().
2375 */
2376 lu_gp_new = core_alua_get_lu_gp_by_name(strstrip(buf));
2377 if (!lu_gp_new)
2378 return -ENODEV;
2379 }
2380
2381 spin_lock(&lu_gp_mem->lu_gp_mem_lock);
2382 lu_gp = lu_gp_mem->lu_gp;
2383 if (lu_gp) {
2384 /*
2385 * Clearing an existing lu_gp association, and replacing
2386 * with NULL
2387 */
2388 if (!lu_gp_new) {
2389 pr_debug("Target_Core_ConfigFS: Releasing %s/%s"
2390 " from ALUA LU Group: core/alua/lu_gps/%s, ID:"
2391 " %hu\n",
2392 config_item_name(&hba->hba_group.cg_item),
2393 config_item_name(&dev->dev_group.cg_item),
2394 config_item_name(&lu_gp->lu_gp_group.cg_item),
2395 lu_gp->lu_gp_id);
2396
2397 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2398 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2399
2400 return count;
2401 }
2402 /*
2403 * Removing existing association of lu_gp_mem with lu_gp
2404 */
2405 __core_alua_drop_lu_gp_mem(lu_gp_mem, lu_gp);
2406 move = 1;
2407 }
2408 /*
2409 * Associate lu_gp_mem with lu_gp_new.
2410 */
2411 __core_alua_attach_lu_gp_mem(lu_gp_mem, lu_gp_new);
2412 spin_unlock(&lu_gp_mem->lu_gp_mem_lock);
2413
2414 pr_debug("Target_Core_ConfigFS: %s %s/%s to ALUA LU Group:"
2415 " core/alua/lu_gps/%s, ID: %hu\n",
2416 (move) ? "Moving" : "Adding",
2417 config_item_name(&hba->hba_group.cg_item),
2418 config_item_name(&dev->dev_group.cg_item),
2419 config_item_name(&lu_gp_new->lu_gp_group.cg_item),
2420 lu_gp_new->lu_gp_id);
2421
2422 core_alua_put_lu_gp_from_name(lu_gp_new);
2423 return count;
2424 }
2425
target_dev_lba_map_show(struct config_item * item,char * page)2426 static ssize_t target_dev_lba_map_show(struct config_item *item, char *page)
2427 {
2428 struct se_device *dev = to_device(item);
2429 struct t10_alua_lba_map *map;
2430 struct t10_alua_lba_map_member *mem;
2431 char *b = page;
2432 int bl = 0;
2433 char state;
2434
2435 spin_lock(&dev->t10_alua.lba_map_lock);
2436 if (!list_empty(&dev->t10_alua.lba_map_list))
2437 bl += sprintf(b + bl, "%u %u\n",
2438 dev->t10_alua.lba_map_segment_size,
2439 dev->t10_alua.lba_map_segment_multiplier);
2440 list_for_each_entry(map, &dev->t10_alua.lba_map_list, lba_map_list) {
2441 bl += sprintf(b + bl, "%llu %llu",
2442 map->lba_map_first_lba, map->lba_map_last_lba);
2443 list_for_each_entry(mem, &map->lba_map_mem_list,
2444 lba_map_mem_list) {
2445 switch (mem->lba_map_mem_alua_state) {
2446 case ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED:
2447 state = 'O';
2448 break;
2449 case ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED:
2450 state = 'A';
2451 break;
2452 case ALUA_ACCESS_STATE_STANDBY:
2453 state = 'S';
2454 break;
2455 case ALUA_ACCESS_STATE_UNAVAILABLE:
2456 state = 'U';
2457 break;
2458 default:
2459 state = '.';
2460 break;
2461 }
2462 bl += sprintf(b + bl, " %d:%c",
2463 mem->lba_map_mem_alua_pg_id, state);
2464 }
2465 bl += sprintf(b + bl, "\n");
2466 }
2467 spin_unlock(&dev->t10_alua.lba_map_lock);
2468 return bl;
2469 }
2470
target_dev_lba_map_store(struct config_item * item,const char * page,size_t count)2471 static ssize_t target_dev_lba_map_store(struct config_item *item,
2472 const char *page, size_t count)
2473 {
2474 struct se_device *dev = to_device(item);
2475 struct t10_alua_lba_map *lba_map = NULL;
2476 struct list_head lba_list;
2477 char *map_entries, *orig, *ptr;
2478 char state;
2479 int pg_num = -1, pg;
2480 int ret = 0, num = 0, pg_id, alua_state;
2481 unsigned long start_lba = -1, end_lba = -1;
2482 unsigned long segment_size = -1, segment_mult = -1;
2483
2484 orig = map_entries = kstrdup(page, GFP_KERNEL);
2485 if (!map_entries)
2486 return -ENOMEM;
2487
2488 INIT_LIST_HEAD(&lba_list);
2489 while ((ptr = strsep(&map_entries, "\n")) != NULL) {
2490 if (!*ptr)
2491 continue;
2492
2493 if (num == 0) {
2494 if (sscanf(ptr, "%lu %lu\n",
2495 &segment_size, &segment_mult) != 2) {
2496 pr_err("Invalid line %d\n", num);
2497 ret = -EINVAL;
2498 break;
2499 }
2500 num++;
2501 continue;
2502 }
2503 if (sscanf(ptr, "%lu %lu", &start_lba, &end_lba) != 2) {
2504 pr_err("Invalid line %d\n", num);
2505 ret = -EINVAL;
2506 break;
2507 }
2508 ptr = strchr(ptr, ' ');
2509 if (!ptr) {
2510 pr_err("Invalid line %d, missing end lba\n", num);
2511 ret = -EINVAL;
2512 break;
2513 }
2514 ptr++;
2515 ptr = strchr(ptr, ' ');
2516 if (!ptr) {
2517 pr_err("Invalid line %d, missing state definitions\n",
2518 num);
2519 ret = -EINVAL;
2520 break;
2521 }
2522 ptr++;
2523 lba_map = core_alua_allocate_lba_map(&lba_list,
2524 start_lba, end_lba);
2525 if (IS_ERR(lba_map)) {
2526 ret = PTR_ERR(lba_map);
2527 break;
2528 }
2529 pg = 0;
2530 while (sscanf(ptr, "%d:%c", &pg_id, &state) == 2) {
2531 switch (state) {
2532 case 'O':
2533 alua_state = ALUA_ACCESS_STATE_ACTIVE_OPTIMIZED;
2534 break;
2535 case 'A':
2536 alua_state = ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED;
2537 break;
2538 case 'S':
2539 alua_state = ALUA_ACCESS_STATE_STANDBY;
2540 break;
2541 case 'U':
2542 alua_state = ALUA_ACCESS_STATE_UNAVAILABLE;
2543 break;
2544 default:
2545 pr_err("Invalid ALUA state '%c'\n", state);
2546 ret = -EINVAL;
2547 goto out;
2548 }
2549
2550 ret = core_alua_allocate_lba_map_mem(lba_map,
2551 pg_id, alua_state);
2552 if (ret) {
2553 pr_err("Invalid target descriptor %d:%c "
2554 "at line %d\n",
2555 pg_id, state, num);
2556 break;
2557 }
2558 pg++;
2559 ptr = strchr(ptr, ' ');
2560 if (ptr)
2561 ptr++;
2562 else
2563 break;
2564 }
2565 if (pg_num == -1)
2566 pg_num = pg;
2567 else if (pg != pg_num) {
2568 pr_err("Only %d from %d port groups definitions "
2569 "at line %d\n", pg, pg_num, num);
2570 ret = -EINVAL;
2571 break;
2572 }
2573 num++;
2574 }
2575 out:
2576 if (ret) {
2577 core_alua_free_lba_map(&lba_list);
2578 count = ret;
2579 } else
2580 core_alua_set_lba_map(dev, &lba_list,
2581 segment_size, segment_mult);
2582 kfree(orig);
2583 return count;
2584 }
2585
2586 CONFIGFS_ATTR_RO(target_dev_, info);
2587 CONFIGFS_ATTR_WO(target_dev_, control);
2588 CONFIGFS_ATTR(target_dev_, alias);
2589 CONFIGFS_ATTR(target_dev_, udev_path);
2590 CONFIGFS_ATTR(target_dev_, enable);
2591 CONFIGFS_ATTR(target_dev_, alua_lu_gp);
2592 CONFIGFS_ATTR(target_dev_, lba_map);
2593
2594 static struct configfs_attribute *target_core_dev_attrs[] = {
2595 &target_dev_attr_info,
2596 &target_dev_attr_control,
2597 &target_dev_attr_alias,
2598 &target_dev_attr_udev_path,
2599 &target_dev_attr_enable,
2600 &target_dev_attr_alua_lu_gp,
2601 &target_dev_attr_lba_map,
2602 NULL,
2603 };
2604
target_core_dev_release(struct config_item * item)2605 static void target_core_dev_release(struct config_item *item)
2606 {
2607 struct config_group *dev_cg = to_config_group(item);
2608 struct se_device *dev =
2609 container_of(dev_cg, struct se_device, dev_group);
2610
2611 target_free_device(dev);
2612 }
2613
2614 /*
2615 * Used in target_core_fabric_configfs.c to verify valid se_device symlink
2616 * within target_fabric_port_link()
2617 */
2618 struct configfs_item_operations target_core_dev_item_ops = {
2619 .release = target_core_dev_release,
2620 };
2621
2622 TB_CIT_SETUP(dev, &target_core_dev_item_ops, NULL, target_core_dev_attrs);
2623
2624 /* End functions for struct config_item_type tb_dev_cit */
2625
2626 /* Start functions for struct config_item_type target_core_alua_lu_gp_cit */
2627
to_lu_gp(struct config_item * item)2628 static inline struct t10_alua_lu_gp *to_lu_gp(struct config_item *item)
2629 {
2630 return container_of(to_config_group(item), struct t10_alua_lu_gp,
2631 lu_gp_group);
2632 }
2633
target_lu_gp_lu_gp_id_show(struct config_item * item,char * page)2634 static ssize_t target_lu_gp_lu_gp_id_show(struct config_item *item, char *page)
2635 {
2636 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2637
2638 if (!lu_gp->lu_gp_valid_id)
2639 return 0;
2640 return sprintf(page, "%hu\n", lu_gp->lu_gp_id);
2641 }
2642
target_lu_gp_lu_gp_id_store(struct config_item * item,const char * page,size_t count)2643 static ssize_t target_lu_gp_lu_gp_id_store(struct config_item *item,
2644 const char *page, size_t count)
2645 {
2646 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2647 struct config_group *alua_lu_gp_cg = &lu_gp->lu_gp_group;
2648 unsigned long lu_gp_id;
2649 int ret;
2650
2651 ret = kstrtoul(page, 0, &lu_gp_id);
2652 if (ret < 0) {
2653 pr_err("kstrtoul() returned %d for"
2654 " lu_gp_id\n", ret);
2655 return ret;
2656 }
2657 if (lu_gp_id > 0x0000ffff) {
2658 pr_err("ALUA lu_gp_id: %lu exceeds maximum:"
2659 " 0x0000ffff\n", lu_gp_id);
2660 return -EINVAL;
2661 }
2662
2663 ret = core_alua_set_lu_gp_id(lu_gp, (u16)lu_gp_id);
2664 if (ret < 0)
2665 return -EINVAL;
2666
2667 pr_debug("Target_Core_ConfigFS: Set ALUA Logical Unit"
2668 " Group: core/alua/lu_gps/%s to ID: %hu\n",
2669 config_item_name(&alua_lu_gp_cg->cg_item),
2670 lu_gp->lu_gp_id);
2671
2672 return count;
2673 }
2674
target_lu_gp_members_show(struct config_item * item,char * page)2675 static ssize_t target_lu_gp_members_show(struct config_item *item, char *page)
2676 {
2677 struct t10_alua_lu_gp *lu_gp = to_lu_gp(item);
2678 struct se_device *dev;
2679 struct se_hba *hba;
2680 struct t10_alua_lu_gp_member *lu_gp_mem;
2681 ssize_t len = 0, cur_len;
2682 unsigned char buf[LU_GROUP_NAME_BUF] = { };
2683
2684 spin_lock(&lu_gp->lu_gp_lock);
2685 list_for_each_entry(lu_gp_mem, &lu_gp->lu_gp_mem_list, lu_gp_mem_list) {
2686 dev = lu_gp_mem->lu_gp_mem_dev;
2687 hba = dev->se_hba;
2688
2689 cur_len = snprintf(buf, LU_GROUP_NAME_BUF, "%s/%s\n",
2690 config_item_name(&hba->hba_group.cg_item),
2691 config_item_name(&dev->dev_group.cg_item));
2692 cur_len++; /* Extra byte for NULL terminator */
2693
2694 if ((cur_len + len) > PAGE_SIZE) {
2695 pr_warn("Ran out of lu_gp_show_attr"
2696 "_members buffer\n");
2697 break;
2698 }
2699 memcpy(page+len, buf, cur_len);
2700 len += cur_len;
2701 }
2702 spin_unlock(&lu_gp->lu_gp_lock);
2703
2704 return len;
2705 }
2706
2707 CONFIGFS_ATTR(target_lu_gp_, lu_gp_id);
2708 CONFIGFS_ATTR_RO(target_lu_gp_, members);
2709
2710 static struct configfs_attribute *target_core_alua_lu_gp_attrs[] = {
2711 &target_lu_gp_attr_lu_gp_id,
2712 &target_lu_gp_attr_members,
2713 NULL,
2714 };
2715
target_core_alua_lu_gp_release(struct config_item * item)2716 static void target_core_alua_lu_gp_release(struct config_item *item)
2717 {
2718 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2719 struct t10_alua_lu_gp, lu_gp_group);
2720
2721 core_alua_free_lu_gp(lu_gp);
2722 }
2723
2724 static struct configfs_item_operations target_core_alua_lu_gp_ops = {
2725 .release = target_core_alua_lu_gp_release,
2726 };
2727
2728 static const struct config_item_type target_core_alua_lu_gp_cit = {
2729 .ct_item_ops = &target_core_alua_lu_gp_ops,
2730 .ct_attrs = target_core_alua_lu_gp_attrs,
2731 .ct_owner = THIS_MODULE,
2732 };
2733
2734 /* End functions for struct config_item_type target_core_alua_lu_gp_cit */
2735
2736 /* Start functions for struct config_item_type target_core_alua_lu_gps_cit */
2737
target_core_alua_create_lu_gp(struct config_group * group,const char * name)2738 static struct config_group *target_core_alua_create_lu_gp(
2739 struct config_group *group,
2740 const char *name)
2741 {
2742 struct t10_alua_lu_gp *lu_gp;
2743 struct config_group *alua_lu_gp_cg = NULL;
2744 struct config_item *alua_lu_gp_ci = NULL;
2745
2746 lu_gp = core_alua_allocate_lu_gp(name, 0);
2747 if (IS_ERR(lu_gp))
2748 return NULL;
2749
2750 alua_lu_gp_cg = &lu_gp->lu_gp_group;
2751 alua_lu_gp_ci = &alua_lu_gp_cg->cg_item;
2752
2753 config_group_init_type_name(alua_lu_gp_cg, name,
2754 &target_core_alua_lu_gp_cit);
2755
2756 pr_debug("Target_Core_ConfigFS: Allocated ALUA Logical Unit"
2757 " Group: core/alua/lu_gps/%s\n",
2758 config_item_name(alua_lu_gp_ci));
2759
2760 return alua_lu_gp_cg;
2761
2762 }
2763
target_core_alua_drop_lu_gp(struct config_group * group,struct config_item * item)2764 static void target_core_alua_drop_lu_gp(
2765 struct config_group *group,
2766 struct config_item *item)
2767 {
2768 struct t10_alua_lu_gp *lu_gp = container_of(to_config_group(item),
2769 struct t10_alua_lu_gp, lu_gp_group);
2770
2771 pr_debug("Target_Core_ConfigFS: Releasing ALUA Logical Unit"
2772 " Group: core/alua/lu_gps/%s, ID: %hu\n",
2773 config_item_name(item), lu_gp->lu_gp_id);
2774 /*
2775 * core_alua_free_lu_gp() is called from target_core_alua_lu_gp_ops->release()
2776 * -> target_core_alua_lu_gp_release()
2777 */
2778 config_item_put(item);
2779 }
2780
2781 static struct configfs_group_operations target_core_alua_lu_gps_group_ops = {
2782 .make_group = &target_core_alua_create_lu_gp,
2783 .drop_item = &target_core_alua_drop_lu_gp,
2784 };
2785
2786 static const struct config_item_type target_core_alua_lu_gps_cit = {
2787 .ct_item_ops = NULL,
2788 .ct_group_ops = &target_core_alua_lu_gps_group_ops,
2789 .ct_owner = THIS_MODULE,
2790 };
2791
2792 /* End functions for struct config_item_type target_core_alua_lu_gps_cit */
2793
2794 /* Start functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
2795
to_tg_pt_gp(struct config_item * item)2796 static inline struct t10_alua_tg_pt_gp *to_tg_pt_gp(struct config_item *item)
2797 {
2798 return container_of(to_config_group(item), struct t10_alua_tg_pt_gp,
2799 tg_pt_gp_group);
2800 }
2801
target_tg_pt_gp_alua_access_state_show(struct config_item * item,char * page)2802 static ssize_t target_tg_pt_gp_alua_access_state_show(struct config_item *item,
2803 char *page)
2804 {
2805 return sprintf(page, "%d\n",
2806 to_tg_pt_gp(item)->tg_pt_gp_alua_access_state);
2807 }
2808
target_tg_pt_gp_alua_access_state_store(struct config_item * item,const char * page,size_t count)2809 static ssize_t target_tg_pt_gp_alua_access_state_store(struct config_item *item,
2810 const char *page, size_t count)
2811 {
2812 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2813 struct se_device *dev = tg_pt_gp->tg_pt_gp_dev;
2814 unsigned long tmp;
2815 int new_state, ret;
2816
2817 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2818 pr_err("Unable to do implicit ALUA on invalid tg_pt_gp ID\n");
2819 return -EINVAL;
2820 }
2821 if (!target_dev_configured(dev)) {
2822 pr_err("Unable to set alua_access_state while device is"
2823 " not configured\n");
2824 return -ENODEV;
2825 }
2826
2827 ret = kstrtoul(page, 0, &tmp);
2828 if (ret < 0) {
2829 pr_err("Unable to extract new ALUA access state from"
2830 " %s\n", page);
2831 return ret;
2832 }
2833 new_state = (int)tmp;
2834
2835 if (!(tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_IMPLICIT_ALUA)) {
2836 pr_err("Unable to process implicit configfs ALUA"
2837 " transition while TPGS_IMPLICIT_ALUA is disabled\n");
2838 return -EINVAL;
2839 }
2840 if (tg_pt_gp->tg_pt_gp_alua_access_type & TPGS_EXPLICIT_ALUA &&
2841 new_state == ALUA_ACCESS_STATE_LBA_DEPENDENT) {
2842 /* LBA DEPENDENT is only allowed with implicit ALUA */
2843 pr_err("Unable to process implicit configfs ALUA transition"
2844 " while explicit ALUA management is enabled\n");
2845 return -EINVAL;
2846 }
2847
2848 ret = core_alua_do_port_transition(tg_pt_gp, dev,
2849 NULL, NULL, new_state, 0);
2850 return (!ret) ? count : -EINVAL;
2851 }
2852
target_tg_pt_gp_alua_access_status_show(struct config_item * item,char * page)2853 static ssize_t target_tg_pt_gp_alua_access_status_show(struct config_item *item,
2854 char *page)
2855 {
2856 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2857 return sprintf(page, "%s\n",
2858 core_alua_dump_status(tg_pt_gp->tg_pt_gp_alua_access_status));
2859 }
2860
target_tg_pt_gp_alua_access_status_store(struct config_item * item,const char * page,size_t count)2861 static ssize_t target_tg_pt_gp_alua_access_status_store(
2862 struct config_item *item, const char *page, size_t count)
2863 {
2864 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2865 unsigned long tmp;
2866 int new_status, ret;
2867
2868 if (!tg_pt_gp->tg_pt_gp_valid_id) {
2869 pr_err("Unable to set ALUA access status on invalid tg_pt_gp ID\n");
2870 return -EINVAL;
2871 }
2872
2873 ret = kstrtoul(page, 0, &tmp);
2874 if (ret < 0) {
2875 pr_err("Unable to extract new ALUA access status"
2876 " from %s\n", page);
2877 return ret;
2878 }
2879 new_status = (int)tmp;
2880
2881 if ((new_status != ALUA_STATUS_NONE) &&
2882 (new_status != ALUA_STATUS_ALTERED_BY_EXPLICIT_STPG) &&
2883 (new_status != ALUA_STATUS_ALTERED_BY_IMPLICIT_ALUA)) {
2884 pr_err("Illegal ALUA access status: 0x%02x\n",
2885 new_status);
2886 return -EINVAL;
2887 }
2888
2889 tg_pt_gp->tg_pt_gp_alua_access_status = new_status;
2890 return count;
2891 }
2892
target_tg_pt_gp_alua_access_type_show(struct config_item * item,char * page)2893 static ssize_t target_tg_pt_gp_alua_access_type_show(struct config_item *item,
2894 char *page)
2895 {
2896 return core_alua_show_access_type(to_tg_pt_gp(item), page);
2897 }
2898
target_tg_pt_gp_alua_access_type_store(struct config_item * item,const char * page,size_t count)2899 static ssize_t target_tg_pt_gp_alua_access_type_store(struct config_item *item,
2900 const char *page, size_t count)
2901 {
2902 return core_alua_store_access_type(to_tg_pt_gp(item), page, count);
2903 }
2904
2905 #define ALUA_SUPPORTED_STATE_ATTR(_name, _bit) \
2906 static ssize_t target_tg_pt_gp_alua_support_##_name##_show( \
2907 struct config_item *item, char *p) \
2908 { \
2909 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2910 return sprintf(p, "%d\n", \
2911 !!(t->tg_pt_gp_alua_supported_states & _bit)); \
2912 } \
2913 \
2914 static ssize_t target_tg_pt_gp_alua_support_##_name##_store( \
2915 struct config_item *item, const char *p, size_t c) \
2916 { \
2917 struct t10_alua_tg_pt_gp *t = to_tg_pt_gp(item); \
2918 unsigned long tmp; \
2919 int ret; \
2920 \
2921 if (!t->tg_pt_gp_valid_id) { \
2922 pr_err("Unable to set " #_name " ALUA state on invalid tg_pt_gp ID\n"); \
2923 return -EINVAL; \
2924 } \
2925 \
2926 ret = kstrtoul(p, 0, &tmp); \
2927 if (ret < 0) { \
2928 pr_err("Invalid value '%s', must be '0' or '1'\n", p); \
2929 return -EINVAL; \
2930 } \
2931 if (tmp > 1) { \
2932 pr_err("Invalid value '%ld', must be '0' or '1'\n", tmp); \
2933 return -EINVAL; \
2934 } \
2935 if (tmp) \
2936 t->tg_pt_gp_alua_supported_states |= _bit; \
2937 else \
2938 t->tg_pt_gp_alua_supported_states &= ~_bit; \
2939 \
2940 return c; \
2941 }
2942
2943 ALUA_SUPPORTED_STATE_ATTR(transitioning, ALUA_T_SUP);
2944 ALUA_SUPPORTED_STATE_ATTR(offline, ALUA_O_SUP);
2945 ALUA_SUPPORTED_STATE_ATTR(lba_dependent, ALUA_LBD_SUP);
2946 ALUA_SUPPORTED_STATE_ATTR(unavailable, ALUA_U_SUP);
2947 ALUA_SUPPORTED_STATE_ATTR(standby, ALUA_S_SUP);
2948 ALUA_SUPPORTED_STATE_ATTR(active_optimized, ALUA_AO_SUP);
2949 ALUA_SUPPORTED_STATE_ATTR(active_nonoptimized, ALUA_AN_SUP);
2950
target_tg_pt_gp_alua_write_metadata_show(struct config_item * item,char * page)2951 static ssize_t target_tg_pt_gp_alua_write_metadata_show(
2952 struct config_item *item, char *page)
2953 {
2954 return sprintf(page, "%d\n",
2955 to_tg_pt_gp(item)->tg_pt_gp_write_metadata);
2956 }
2957
target_tg_pt_gp_alua_write_metadata_store(struct config_item * item,const char * page,size_t count)2958 static ssize_t target_tg_pt_gp_alua_write_metadata_store(
2959 struct config_item *item, const char *page, size_t count)
2960 {
2961 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
2962 unsigned long tmp;
2963 int ret;
2964
2965 ret = kstrtoul(page, 0, &tmp);
2966 if (ret < 0) {
2967 pr_err("Unable to extract alua_write_metadata\n");
2968 return ret;
2969 }
2970
2971 if ((tmp != 0) && (tmp != 1)) {
2972 pr_err("Illegal value for alua_write_metadata:"
2973 " %lu\n", tmp);
2974 return -EINVAL;
2975 }
2976 tg_pt_gp->tg_pt_gp_write_metadata = (int)tmp;
2977
2978 return count;
2979 }
2980
target_tg_pt_gp_nonop_delay_msecs_show(struct config_item * item,char * page)2981 static ssize_t target_tg_pt_gp_nonop_delay_msecs_show(struct config_item *item,
2982 char *page)
2983 {
2984 return core_alua_show_nonop_delay_msecs(to_tg_pt_gp(item), page);
2985 }
2986
target_tg_pt_gp_nonop_delay_msecs_store(struct config_item * item,const char * page,size_t count)2987 static ssize_t target_tg_pt_gp_nonop_delay_msecs_store(struct config_item *item,
2988 const char *page, size_t count)
2989 {
2990 return core_alua_store_nonop_delay_msecs(to_tg_pt_gp(item), page,
2991 count);
2992 }
2993
target_tg_pt_gp_trans_delay_msecs_show(struct config_item * item,char * page)2994 static ssize_t target_tg_pt_gp_trans_delay_msecs_show(struct config_item *item,
2995 char *page)
2996 {
2997 return core_alua_show_trans_delay_msecs(to_tg_pt_gp(item), page);
2998 }
2999
target_tg_pt_gp_trans_delay_msecs_store(struct config_item * item,const char * page,size_t count)3000 static ssize_t target_tg_pt_gp_trans_delay_msecs_store(struct config_item *item,
3001 const char *page, size_t count)
3002 {
3003 return core_alua_store_trans_delay_msecs(to_tg_pt_gp(item), page,
3004 count);
3005 }
3006
target_tg_pt_gp_implicit_trans_secs_show(struct config_item * item,char * page)3007 static ssize_t target_tg_pt_gp_implicit_trans_secs_show(
3008 struct config_item *item, char *page)
3009 {
3010 return core_alua_show_implicit_trans_secs(to_tg_pt_gp(item), page);
3011 }
3012
target_tg_pt_gp_implicit_trans_secs_store(struct config_item * item,const char * page,size_t count)3013 static ssize_t target_tg_pt_gp_implicit_trans_secs_store(
3014 struct config_item *item, const char *page, size_t count)
3015 {
3016 return core_alua_store_implicit_trans_secs(to_tg_pt_gp(item), page,
3017 count);
3018 }
3019
target_tg_pt_gp_preferred_show(struct config_item * item,char * page)3020 static ssize_t target_tg_pt_gp_preferred_show(struct config_item *item,
3021 char *page)
3022 {
3023 return core_alua_show_preferred_bit(to_tg_pt_gp(item), page);
3024 }
3025
target_tg_pt_gp_preferred_store(struct config_item * item,const char * page,size_t count)3026 static ssize_t target_tg_pt_gp_preferred_store(struct config_item *item,
3027 const char *page, size_t count)
3028 {
3029 return core_alua_store_preferred_bit(to_tg_pt_gp(item), page, count);
3030 }
3031
target_tg_pt_gp_tg_pt_gp_id_show(struct config_item * item,char * page)3032 static ssize_t target_tg_pt_gp_tg_pt_gp_id_show(struct config_item *item,
3033 char *page)
3034 {
3035 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3036
3037 if (!tg_pt_gp->tg_pt_gp_valid_id)
3038 return 0;
3039 return sprintf(page, "%hu\n", tg_pt_gp->tg_pt_gp_id);
3040 }
3041
target_tg_pt_gp_tg_pt_gp_id_store(struct config_item * item,const char * page,size_t count)3042 static ssize_t target_tg_pt_gp_tg_pt_gp_id_store(struct config_item *item,
3043 const char *page, size_t count)
3044 {
3045 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3046 struct config_group *alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3047 unsigned long tg_pt_gp_id;
3048 int ret;
3049
3050 ret = kstrtoul(page, 0, &tg_pt_gp_id);
3051 if (ret < 0) {
3052 pr_err("ALUA tg_pt_gp_id: invalid value '%s' for tg_pt_gp_id\n",
3053 page);
3054 return ret;
3055 }
3056 if (tg_pt_gp_id > 0x0000ffff) {
3057 pr_err("ALUA tg_pt_gp_id: %lu exceeds maximum: 0x0000ffff\n",
3058 tg_pt_gp_id);
3059 return -EINVAL;
3060 }
3061
3062 ret = core_alua_set_tg_pt_gp_id(tg_pt_gp, (u16)tg_pt_gp_id);
3063 if (ret < 0)
3064 return -EINVAL;
3065
3066 pr_debug("Target_Core_ConfigFS: Set ALUA Target Port Group: "
3067 "core/alua/tg_pt_gps/%s to ID: %hu\n",
3068 config_item_name(&alua_tg_pt_gp_cg->cg_item),
3069 tg_pt_gp->tg_pt_gp_id);
3070
3071 return count;
3072 }
3073
target_tg_pt_gp_members_show(struct config_item * item,char * page)3074 static ssize_t target_tg_pt_gp_members_show(struct config_item *item,
3075 char *page)
3076 {
3077 struct t10_alua_tg_pt_gp *tg_pt_gp = to_tg_pt_gp(item);
3078 struct se_lun *lun;
3079 ssize_t len = 0, cur_len;
3080 unsigned char buf[TG_PT_GROUP_NAME_BUF] = { };
3081
3082 spin_lock(&tg_pt_gp->tg_pt_gp_lock);
3083 list_for_each_entry(lun, &tg_pt_gp->tg_pt_gp_lun_list,
3084 lun_tg_pt_gp_link) {
3085 struct se_portal_group *tpg = lun->lun_tpg;
3086
3087 cur_len = snprintf(buf, TG_PT_GROUP_NAME_BUF, "%s/%s/tpgt_%hu"
3088 "/%s\n", tpg->se_tpg_tfo->fabric_name,
3089 tpg->se_tpg_tfo->tpg_get_wwn(tpg),
3090 tpg->se_tpg_tfo->tpg_get_tag(tpg),
3091 config_item_name(&lun->lun_group.cg_item));
3092 cur_len++; /* Extra byte for NULL terminator */
3093
3094 if ((cur_len + len) > PAGE_SIZE) {
3095 pr_warn("Ran out of lu_gp_show_attr"
3096 "_members buffer\n");
3097 break;
3098 }
3099 memcpy(page+len, buf, cur_len);
3100 len += cur_len;
3101 }
3102 spin_unlock(&tg_pt_gp->tg_pt_gp_lock);
3103
3104 return len;
3105 }
3106
3107 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_state);
3108 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_status);
3109 CONFIGFS_ATTR(target_tg_pt_gp_, alua_access_type);
3110 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_transitioning);
3111 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_offline);
3112 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_lba_dependent);
3113 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_unavailable);
3114 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_standby);
3115 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_optimized);
3116 CONFIGFS_ATTR(target_tg_pt_gp_, alua_support_active_nonoptimized);
3117 CONFIGFS_ATTR(target_tg_pt_gp_, alua_write_metadata);
3118 CONFIGFS_ATTR(target_tg_pt_gp_, nonop_delay_msecs);
3119 CONFIGFS_ATTR(target_tg_pt_gp_, trans_delay_msecs);
3120 CONFIGFS_ATTR(target_tg_pt_gp_, implicit_trans_secs);
3121 CONFIGFS_ATTR(target_tg_pt_gp_, preferred);
3122 CONFIGFS_ATTR(target_tg_pt_gp_, tg_pt_gp_id);
3123 CONFIGFS_ATTR_RO(target_tg_pt_gp_, members);
3124
3125 static struct configfs_attribute *target_core_alua_tg_pt_gp_attrs[] = {
3126 &target_tg_pt_gp_attr_alua_access_state,
3127 &target_tg_pt_gp_attr_alua_access_status,
3128 &target_tg_pt_gp_attr_alua_access_type,
3129 &target_tg_pt_gp_attr_alua_support_transitioning,
3130 &target_tg_pt_gp_attr_alua_support_offline,
3131 &target_tg_pt_gp_attr_alua_support_lba_dependent,
3132 &target_tg_pt_gp_attr_alua_support_unavailable,
3133 &target_tg_pt_gp_attr_alua_support_standby,
3134 &target_tg_pt_gp_attr_alua_support_active_nonoptimized,
3135 &target_tg_pt_gp_attr_alua_support_active_optimized,
3136 &target_tg_pt_gp_attr_alua_write_metadata,
3137 &target_tg_pt_gp_attr_nonop_delay_msecs,
3138 &target_tg_pt_gp_attr_trans_delay_msecs,
3139 &target_tg_pt_gp_attr_implicit_trans_secs,
3140 &target_tg_pt_gp_attr_preferred,
3141 &target_tg_pt_gp_attr_tg_pt_gp_id,
3142 &target_tg_pt_gp_attr_members,
3143 NULL,
3144 };
3145
target_core_alua_tg_pt_gp_release(struct config_item * item)3146 static void target_core_alua_tg_pt_gp_release(struct config_item *item)
3147 {
3148 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3149 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3150
3151 core_alua_free_tg_pt_gp(tg_pt_gp);
3152 }
3153
3154 static struct configfs_item_operations target_core_alua_tg_pt_gp_ops = {
3155 .release = target_core_alua_tg_pt_gp_release,
3156 };
3157
3158 static const struct config_item_type target_core_alua_tg_pt_gp_cit = {
3159 .ct_item_ops = &target_core_alua_tg_pt_gp_ops,
3160 .ct_attrs = target_core_alua_tg_pt_gp_attrs,
3161 .ct_owner = THIS_MODULE,
3162 };
3163
3164 /* End functions for struct config_item_type target_core_alua_tg_pt_gp_cit */
3165
3166 /* Start functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3167
target_core_alua_create_tg_pt_gp(struct config_group * group,const char * name)3168 static struct config_group *target_core_alua_create_tg_pt_gp(
3169 struct config_group *group,
3170 const char *name)
3171 {
3172 struct t10_alua *alua = container_of(group, struct t10_alua,
3173 alua_tg_pt_gps_group);
3174 struct t10_alua_tg_pt_gp *tg_pt_gp;
3175 struct config_group *alua_tg_pt_gp_cg = NULL;
3176 struct config_item *alua_tg_pt_gp_ci = NULL;
3177
3178 tg_pt_gp = core_alua_allocate_tg_pt_gp(alua->t10_dev, name, 0);
3179 if (!tg_pt_gp)
3180 return NULL;
3181
3182 alua_tg_pt_gp_cg = &tg_pt_gp->tg_pt_gp_group;
3183 alua_tg_pt_gp_ci = &alua_tg_pt_gp_cg->cg_item;
3184
3185 config_group_init_type_name(alua_tg_pt_gp_cg, name,
3186 &target_core_alua_tg_pt_gp_cit);
3187
3188 pr_debug("Target_Core_ConfigFS: Allocated ALUA Target Port"
3189 " Group: alua/tg_pt_gps/%s\n",
3190 config_item_name(alua_tg_pt_gp_ci));
3191
3192 return alua_tg_pt_gp_cg;
3193 }
3194
target_core_alua_drop_tg_pt_gp(struct config_group * group,struct config_item * item)3195 static void target_core_alua_drop_tg_pt_gp(
3196 struct config_group *group,
3197 struct config_item *item)
3198 {
3199 struct t10_alua_tg_pt_gp *tg_pt_gp = container_of(to_config_group(item),
3200 struct t10_alua_tg_pt_gp, tg_pt_gp_group);
3201
3202 pr_debug("Target_Core_ConfigFS: Releasing ALUA Target Port"
3203 " Group: alua/tg_pt_gps/%s, ID: %hu\n",
3204 config_item_name(item), tg_pt_gp->tg_pt_gp_id);
3205 /*
3206 * core_alua_free_tg_pt_gp() is called from target_core_alua_tg_pt_gp_ops->release()
3207 * -> target_core_alua_tg_pt_gp_release().
3208 */
3209 config_item_put(item);
3210 }
3211
3212 static struct configfs_group_operations target_core_alua_tg_pt_gps_group_ops = {
3213 .make_group = &target_core_alua_create_tg_pt_gp,
3214 .drop_item = &target_core_alua_drop_tg_pt_gp,
3215 };
3216
3217 TB_CIT_SETUP(dev_alua_tg_pt_gps, NULL, &target_core_alua_tg_pt_gps_group_ops, NULL);
3218
3219 /* End functions for struct config_item_type tb_alua_tg_pt_gps_cit */
3220
3221 /* Start functions for struct config_item_type target_core_alua_cit */
3222
3223 /*
3224 * target_core_alua_cit is a ConfigFS group that lives under
3225 * /sys/kernel/config/target/core/alua. There are default groups
3226 * core/alua/lu_gps and core/alua/tg_pt_gps that are attached to
3227 * target_core_alua_cit in target_core_init_configfs() below.
3228 */
3229 static const struct config_item_type target_core_alua_cit = {
3230 .ct_item_ops = NULL,
3231 .ct_attrs = NULL,
3232 .ct_owner = THIS_MODULE,
3233 };
3234
3235 /* End functions for struct config_item_type target_core_alua_cit */
3236
3237 /* Start functions for struct config_item_type tb_dev_stat_cit */
3238
target_core_stat_mkdir(struct config_group * group,const char * name)3239 static struct config_group *target_core_stat_mkdir(
3240 struct config_group *group,
3241 const char *name)
3242 {
3243 return ERR_PTR(-ENOSYS);
3244 }
3245
target_core_stat_rmdir(struct config_group * group,struct config_item * item)3246 static void target_core_stat_rmdir(
3247 struct config_group *group,
3248 struct config_item *item)
3249 {
3250 return;
3251 }
3252
3253 static struct configfs_group_operations target_core_stat_group_ops = {
3254 .make_group = &target_core_stat_mkdir,
3255 .drop_item = &target_core_stat_rmdir,
3256 };
3257
3258 TB_CIT_SETUP(dev_stat, NULL, &target_core_stat_group_ops, NULL);
3259
3260 /* End functions for struct config_item_type tb_dev_stat_cit */
3261
3262 /* Start functions for struct config_item_type target_core_hba_cit */
3263
target_core_make_subdev(struct config_group * group,const char * name)3264 static struct config_group *target_core_make_subdev(
3265 struct config_group *group,
3266 const char *name)
3267 {
3268 struct t10_alua_tg_pt_gp *tg_pt_gp;
3269 struct config_item *hba_ci = &group->cg_item;
3270 struct se_hba *hba = item_to_hba(hba_ci);
3271 struct target_backend *tb = hba->backend;
3272 struct se_device *dev;
3273 int errno = -ENOMEM, ret;
3274
3275 ret = mutex_lock_interruptible(&hba->hba_access_mutex);
3276 if (ret)
3277 return ERR_PTR(ret);
3278
3279 dev = target_alloc_device(hba, name);
3280 if (!dev)
3281 goto out_unlock;
3282
3283 config_group_init_type_name(&dev->dev_group, name, &tb->tb_dev_cit);
3284
3285 config_group_init_type_name(&dev->dev_action_group, "action",
3286 &tb->tb_dev_action_cit);
3287 configfs_add_default_group(&dev->dev_action_group, &dev->dev_group);
3288
3289 config_group_init_type_name(&dev->dev_attrib.da_group, "attrib",
3290 &tb->tb_dev_attrib_cit);
3291 configfs_add_default_group(&dev->dev_attrib.da_group, &dev->dev_group);
3292
3293 config_group_init_type_name(&dev->dev_pr_group, "pr",
3294 &tb->tb_dev_pr_cit);
3295 configfs_add_default_group(&dev->dev_pr_group, &dev->dev_group);
3296
3297 config_group_init_type_name(&dev->t10_wwn.t10_wwn_group, "wwn",
3298 &tb->tb_dev_wwn_cit);
3299 configfs_add_default_group(&dev->t10_wwn.t10_wwn_group,
3300 &dev->dev_group);
3301
3302 config_group_init_type_name(&dev->t10_alua.alua_tg_pt_gps_group,
3303 "alua", &tb->tb_dev_alua_tg_pt_gps_cit);
3304 configfs_add_default_group(&dev->t10_alua.alua_tg_pt_gps_group,
3305 &dev->dev_group);
3306
3307 config_group_init_type_name(&dev->dev_stat_grps.stat_group,
3308 "statistics", &tb->tb_dev_stat_cit);
3309 configfs_add_default_group(&dev->dev_stat_grps.stat_group,
3310 &dev->dev_group);
3311
3312 /*
3313 * Add core/$HBA/$DEV/alua/default_tg_pt_gp
3314 */
3315 tg_pt_gp = core_alua_allocate_tg_pt_gp(dev, "default_tg_pt_gp", 1);
3316 if (!tg_pt_gp)
3317 goto out_free_device;
3318 dev->t10_alua.default_tg_pt_gp = tg_pt_gp;
3319
3320 config_group_init_type_name(&tg_pt_gp->tg_pt_gp_group,
3321 "default_tg_pt_gp", &target_core_alua_tg_pt_gp_cit);
3322 configfs_add_default_group(&tg_pt_gp->tg_pt_gp_group,
3323 &dev->t10_alua.alua_tg_pt_gps_group);
3324
3325 /*
3326 * Add core/$HBA/$DEV/statistics/ default groups
3327 */
3328 target_stat_setup_dev_default_groups(dev);
3329
3330 mutex_lock(&target_devices_lock);
3331 target_devices++;
3332 mutex_unlock(&target_devices_lock);
3333
3334 mutex_unlock(&hba->hba_access_mutex);
3335 return &dev->dev_group;
3336
3337 out_free_device:
3338 target_free_device(dev);
3339 out_unlock:
3340 mutex_unlock(&hba->hba_access_mutex);
3341 return ERR_PTR(errno);
3342 }
3343
target_core_drop_subdev(struct config_group * group,struct config_item * item)3344 static void target_core_drop_subdev(
3345 struct config_group *group,
3346 struct config_item *item)
3347 {
3348 struct config_group *dev_cg = to_config_group(item);
3349 struct se_device *dev =
3350 container_of(dev_cg, struct se_device, dev_group);
3351 struct se_hba *hba;
3352
3353 hba = item_to_hba(&dev->se_hba->hba_group.cg_item);
3354
3355 mutex_lock(&hba->hba_access_mutex);
3356
3357 configfs_remove_default_groups(&dev->dev_stat_grps.stat_group);
3358 configfs_remove_default_groups(&dev->t10_alua.alua_tg_pt_gps_group);
3359
3360 /*
3361 * core_alua_free_tg_pt_gp() is called from ->default_tg_pt_gp
3362 * directly from target_core_alua_tg_pt_gp_release().
3363 */
3364 dev->t10_alua.default_tg_pt_gp = NULL;
3365
3366 configfs_remove_default_groups(dev_cg);
3367
3368 /*
3369 * se_dev is released from target_core_dev_item_ops->release()
3370 */
3371 config_item_put(item);
3372
3373 mutex_lock(&target_devices_lock);
3374 target_devices--;
3375 mutex_unlock(&target_devices_lock);
3376
3377 mutex_unlock(&hba->hba_access_mutex);
3378 }
3379
3380 static struct configfs_group_operations target_core_hba_group_ops = {
3381 .make_group = target_core_make_subdev,
3382 .drop_item = target_core_drop_subdev,
3383 };
3384
3385
to_hba(struct config_item * item)3386 static inline struct se_hba *to_hba(struct config_item *item)
3387 {
3388 return container_of(to_config_group(item), struct se_hba, hba_group);
3389 }
3390
target_hba_info_show(struct config_item * item,char * page)3391 static ssize_t target_hba_info_show(struct config_item *item, char *page)
3392 {
3393 struct se_hba *hba = to_hba(item);
3394
3395 return sprintf(page, "HBA Index: %d plugin: %s version: %s\n",
3396 hba->hba_id, hba->backend->ops->name,
3397 TARGET_CORE_VERSION);
3398 }
3399
target_hba_mode_show(struct config_item * item,char * page)3400 static ssize_t target_hba_mode_show(struct config_item *item, char *page)
3401 {
3402 struct se_hba *hba = to_hba(item);
3403 int hba_mode = 0;
3404
3405 if (hba->hba_flags & HBA_FLAGS_PSCSI_MODE)
3406 hba_mode = 1;
3407
3408 return sprintf(page, "%d\n", hba_mode);
3409 }
3410
target_hba_mode_store(struct config_item * item,const char * page,size_t count)3411 static ssize_t target_hba_mode_store(struct config_item *item,
3412 const char *page, size_t count)
3413 {
3414 struct se_hba *hba = to_hba(item);
3415 unsigned long mode_flag;
3416 int ret;
3417
3418 if (hba->backend->ops->pmode_enable_hba == NULL)
3419 return -EINVAL;
3420
3421 ret = kstrtoul(page, 0, &mode_flag);
3422 if (ret < 0) {
3423 pr_err("Unable to extract hba mode flag: %d\n", ret);
3424 return ret;
3425 }
3426
3427 if (hba->dev_count) {
3428 pr_err("Unable to set hba_mode with active devices\n");
3429 return -EINVAL;
3430 }
3431
3432 ret = hba->backend->ops->pmode_enable_hba(hba, mode_flag);
3433 if (ret < 0)
3434 return -EINVAL;
3435 if (ret > 0)
3436 hba->hba_flags |= HBA_FLAGS_PSCSI_MODE;
3437 else if (ret == 0)
3438 hba->hba_flags &= ~HBA_FLAGS_PSCSI_MODE;
3439
3440 return count;
3441 }
3442
3443 CONFIGFS_ATTR_RO(target_, hba_info);
3444 CONFIGFS_ATTR(target_, hba_mode);
3445
target_core_hba_release(struct config_item * item)3446 static void target_core_hba_release(struct config_item *item)
3447 {
3448 struct se_hba *hba = container_of(to_config_group(item),
3449 struct se_hba, hba_group);
3450 core_delete_hba(hba);
3451 }
3452
3453 static struct configfs_attribute *target_core_hba_attrs[] = {
3454 &target_attr_hba_info,
3455 &target_attr_hba_mode,
3456 NULL,
3457 };
3458
3459 static struct configfs_item_operations target_core_hba_item_ops = {
3460 .release = target_core_hba_release,
3461 };
3462
3463 static const struct config_item_type target_core_hba_cit = {
3464 .ct_item_ops = &target_core_hba_item_ops,
3465 .ct_group_ops = &target_core_hba_group_ops,
3466 .ct_attrs = target_core_hba_attrs,
3467 .ct_owner = THIS_MODULE,
3468 };
3469
target_core_call_addhbatotarget(struct config_group * group,const char * name)3470 static struct config_group *target_core_call_addhbatotarget(
3471 struct config_group *group,
3472 const char *name)
3473 {
3474 char *se_plugin_str, *str, *str2;
3475 struct se_hba *hba;
3476 char buf[TARGET_CORE_NAME_MAX_LEN] = { };
3477 unsigned long plugin_dep_id = 0;
3478 int ret;
3479
3480 if (strlen(name) >= TARGET_CORE_NAME_MAX_LEN) {
3481 pr_err("Passed *name strlen(): %d exceeds"
3482 " TARGET_CORE_NAME_MAX_LEN: %d\n", (int)strlen(name),
3483 TARGET_CORE_NAME_MAX_LEN);
3484 return ERR_PTR(-ENAMETOOLONG);
3485 }
3486 snprintf(buf, TARGET_CORE_NAME_MAX_LEN, "%s", name);
3487
3488 str = strstr(buf, "_");
3489 if (!str) {
3490 pr_err("Unable to locate \"_\" for $SUBSYSTEM_PLUGIN_$HOST_ID\n");
3491 return ERR_PTR(-EINVAL);
3492 }
3493 se_plugin_str = buf;
3494 /*
3495 * Special case for subsystem plugins that have "_" in their names.
3496 * Namely rd_direct and rd_mcp..
3497 */
3498 str2 = strstr(str+1, "_");
3499 if (str2) {
3500 *str2 = '\0'; /* Terminate for *se_plugin_str */
3501 str2++; /* Skip to start of plugin dependent ID */
3502 str = str2;
3503 } else {
3504 *str = '\0'; /* Terminate for *se_plugin_str */
3505 str++; /* Skip to start of plugin dependent ID */
3506 }
3507
3508 ret = kstrtoul(str, 0, &plugin_dep_id);
3509 if (ret < 0) {
3510 pr_err("kstrtoul() returned %d for"
3511 " plugin_dep_id\n", ret);
3512 return ERR_PTR(ret);
3513 }
3514 /*
3515 * Load up TCM subsystem plugins if they have not already been loaded.
3516 */
3517 transport_subsystem_check_init();
3518
3519 hba = core_alloc_hba(se_plugin_str, plugin_dep_id, 0);
3520 if (IS_ERR(hba))
3521 return ERR_CAST(hba);
3522
3523 config_group_init_type_name(&hba->hba_group, name,
3524 &target_core_hba_cit);
3525
3526 return &hba->hba_group;
3527 }
3528
target_core_call_delhbafromtarget(struct config_group * group,struct config_item * item)3529 static void target_core_call_delhbafromtarget(
3530 struct config_group *group,
3531 struct config_item *item)
3532 {
3533 /*
3534 * core_delete_hba() is called from target_core_hba_item_ops->release()
3535 * -> target_core_hba_release()
3536 */
3537 config_item_put(item);
3538 }
3539
3540 static struct configfs_group_operations target_core_group_ops = {
3541 .make_group = target_core_call_addhbatotarget,
3542 .drop_item = target_core_call_delhbafromtarget,
3543 };
3544
3545 static const struct config_item_type target_core_cit = {
3546 .ct_item_ops = NULL,
3547 .ct_group_ops = &target_core_group_ops,
3548 .ct_attrs = NULL,
3549 .ct_owner = THIS_MODULE,
3550 };
3551
3552 /* Stop functions for struct config_item_type target_core_hba_cit */
3553
target_setup_backend_cits(struct target_backend * tb)3554 void target_setup_backend_cits(struct target_backend *tb)
3555 {
3556 target_core_setup_dev_cit(tb);
3557 target_core_setup_dev_action_cit(tb);
3558 target_core_setup_dev_attrib_cit(tb);
3559 target_core_setup_dev_pr_cit(tb);
3560 target_core_setup_dev_wwn_cit(tb);
3561 target_core_setup_dev_alua_tg_pt_gps_cit(tb);
3562 target_core_setup_dev_stat_cit(tb);
3563 }
3564
target_init_dbroot(void)3565 static void target_init_dbroot(void)
3566 {
3567 struct file *fp;
3568
3569 snprintf(db_root_stage, DB_ROOT_LEN, DB_ROOT_PREFERRED);
3570 fp = filp_open(db_root_stage, O_RDONLY, 0);
3571 if (IS_ERR(fp)) {
3572 pr_err("db_root: cannot open: %s\n", db_root_stage);
3573 return;
3574 }
3575 if (!S_ISDIR(file_inode(fp)->i_mode)) {
3576 filp_close(fp, NULL);
3577 pr_err("db_root: not a valid directory: %s\n", db_root_stage);
3578 return;
3579 }
3580 filp_close(fp, NULL);
3581
3582 strncpy(db_root, db_root_stage, DB_ROOT_LEN);
3583 pr_debug("Target_Core_ConfigFS: db_root set to %s\n", db_root);
3584 }
3585
target_core_init_configfs(void)3586 static int __init target_core_init_configfs(void)
3587 {
3588 struct configfs_subsystem *subsys = &target_core_fabrics;
3589 struct t10_alua_lu_gp *lu_gp;
3590 int ret;
3591
3592 pr_debug("TARGET_CORE[0]: Loading Generic Kernel Storage"
3593 " Engine: %s on %s/%s on "UTS_RELEASE"\n",
3594 TARGET_CORE_VERSION, utsname()->sysname, utsname()->machine);
3595
3596 config_group_init(&subsys->su_group);
3597 mutex_init(&subsys->su_mutex);
3598
3599 ret = init_se_kmem_caches();
3600 if (ret < 0)
3601 return ret;
3602 /*
3603 * Create $CONFIGFS/target/core default group for HBA <-> Storage Object
3604 * and ALUA Logical Unit Group and Target Port Group infrastructure.
3605 */
3606 config_group_init_type_name(&target_core_hbagroup, "core",
3607 &target_core_cit);
3608 configfs_add_default_group(&target_core_hbagroup, &subsys->su_group);
3609
3610 /*
3611 * Create ALUA infrastructure under /sys/kernel/config/target/core/alua/
3612 */
3613 config_group_init_type_name(&alua_group, "alua", &target_core_alua_cit);
3614 configfs_add_default_group(&alua_group, &target_core_hbagroup);
3615
3616 /*
3617 * Add ALUA Logical Unit Group and Target Port Group ConfigFS
3618 * groups under /sys/kernel/config/target/core/alua/
3619 */
3620 config_group_init_type_name(&alua_lu_gps_group, "lu_gps",
3621 &target_core_alua_lu_gps_cit);
3622 configfs_add_default_group(&alua_lu_gps_group, &alua_group);
3623
3624 /*
3625 * Add core/alua/lu_gps/default_lu_gp
3626 */
3627 lu_gp = core_alua_allocate_lu_gp("default_lu_gp", 1);
3628 if (IS_ERR(lu_gp)) {
3629 ret = -ENOMEM;
3630 goto out_global;
3631 }
3632
3633 config_group_init_type_name(&lu_gp->lu_gp_group, "default_lu_gp",
3634 &target_core_alua_lu_gp_cit);
3635 configfs_add_default_group(&lu_gp->lu_gp_group, &alua_lu_gps_group);
3636
3637 default_lu_gp = lu_gp;
3638
3639 /*
3640 * Register the target_core_mod subsystem with configfs.
3641 */
3642 ret = configfs_register_subsystem(subsys);
3643 if (ret < 0) {
3644 pr_err("Error %d while registering subsystem %s\n",
3645 ret, subsys->su_group.cg_item.ci_namebuf);
3646 goto out_global;
3647 }
3648 pr_debug("TARGET_CORE[0]: Initialized ConfigFS Fabric"
3649 " Infrastructure: "TARGET_CORE_VERSION" on %s/%s"
3650 " on "UTS_RELEASE"\n", utsname()->sysname, utsname()->machine);
3651 /*
3652 * Register built-in RAMDISK subsystem logic for virtual LUN 0
3653 */
3654 ret = rd_module_init();
3655 if (ret < 0)
3656 goto out;
3657
3658 ret = core_dev_setup_virtual_lun0();
3659 if (ret < 0)
3660 goto out;
3661
3662 ret = target_xcopy_setup_pt();
3663 if (ret < 0)
3664 goto out;
3665
3666 target_init_dbroot();
3667
3668 return 0;
3669
3670 out:
3671 configfs_unregister_subsystem(subsys);
3672 core_dev_release_virtual_lun0();
3673 rd_module_exit();
3674 out_global:
3675 if (default_lu_gp) {
3676 core_alua_free_lu_gp(default_lu_gp);
3677 default_lu_gp = NULL;
3678 }
3679 release_se_kmem_caches();
3680 return ret;
3681 }
3682
target_core_exit_configfs(void)3683 static void __exit target_core_exit_configfs(void)
3684 {
3685 configfs_remove_default_groups(&alua_lu_gps_group);
3686 configfs_remove_default_groups(&alua_group);
3687 configfs_remove_default_groups(&target_core_hbagroup);
3688
3689 /*
3690 * We expect subsys->su_group.default_groups to be released
3691 * by configfs subsystem provider logic..
3692 */
3693 configfs_unregister_subsystem(&target_core_fabrics);
3694
3695 core_alua_free_lu_gp(default_lu_gp);
3696 default_lu_gp = NULL;
3697
3698 pr_debug("TARGET_CORE[0]: Released ConfigFS Fabric"
3699 " Infrastructure\n");
3700
3701 core_dev_release_virtual_lun0();
3702 rd_module_exit();
3703 target_xcopy_release_pt();
3704 release_se_kmem_caches();
3705 }
3706
3707 MODULE_DESCRIPTION("Target_Core_Mod/ConfigFS");
3708 MODULE_AUTHOR("nab@Linux-iSCSI.org");
3709 MODULE_LICENSE("GPL");
3710
3711 module_init(target_core_init_configfs);
3712 module_exit(target_core_exit_configfs);
3713